Release 2019.8.3

This reverts commit e9c9bf3cbd.

.gitignore

@@ -7,3 +7,6 @@ guide/public
 .idea
 .vscode
 \#*\#
+cscope.*
+cloudflared
+!cmd/cloudflared/

Dockerfile

@@ -0,0 +1,12 @@
+FROM golang:1.12 as builder
+WORKDIR /go/src/github.com/cloudflare/cloudflared/
+RUN apt-get update && apt-get install -y --no-install-recommends upx
+# Run after `apt-get update` to improve rebuild scenarios
+COPY . .
+RUN make cloudflared
+RUN upx --no-progress cloudflared
+
+FROM gcr.io/distroless/base
+COPY --from=builder /go/src/github.com/cloudflare/cloudflared/cloudflared /usr/local/bin/
+ENTRYPOINT ["cloudflared", "--no-autoupdate"]
+CMD ["version"]

Gopkg.lock

@@ -2,31 +2,69 @@
 
 
 [[projects]]
+  digest = "1:3d3a509c5ba327e8573bb57f9da8430c63a46a06886eb1d2ffc8af4e76f31c72"
+  name = "cloud.google.com/go"
+  packages = ["civil"]
+  pruneopts = "UT"
+  revision = "cdaaf98f9226c39dc162b8e55083b2fbc67b4674"
+  version = "v0.43.0"
+
+[[projects]]
+  digest = "1:9f3b30d9f8e0d7040f729b82dcbc8f0dead820a133b3147ce355fc451f32d761"
   name = "github.com/BurntSushi/toml"
   packages = ["."]
-  revision = "b26d9c308763d68093482582cea63d69be07a0f0"
-  version = "v0.3.0"
+  pruneopts = "UT"
+  revision = "3012a1dbe2e4bd1391d42b32f0577cb7bbc7f005"
+  version = "v0.3.1"
 
 [[projects]]
-  branch = "master"
+  digest = "1:c84a587136cb69cecc11f3dbe9f9001444044c0dba74997b07f7e4c150b07cda"
+  name = "github.com/DATA-DOG/go-sqlmock"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "3f9954f6f6697845b082ca57995849ddf614f450"
+  version = "v1.3.3"
+
+[[projects]]
+  digest = "1:d6afaeed1502aa28e80a4ed0981d570ad91b2579193404256ce672ed0a609e0d"
   name = "github.com/beorn7/perks"
   packages = ["quantile"]
-  revision = "3a771d992973f24aa725d07868b467d1ddfceafb"
+  pruneopts = "UT"
+  revision = "4b2b341e8d7715fae06375aa633dbb6e91b3fb46"
+  version = "v1.0.0"
 
 [[projects]]
+  digest = "1:fed1f537c2f1269fe475a8556c393fe466641682d73ef8fd0491cd3aa1e47bad"
   name = "github.com/certifi/gocertifi"
   packages = ["."]
+  pruneopts = "UT"
   revision = "deb3ae2ef2610fde3330947281941c562861188b"
   version = "2018.01.18"
 
 [[projects]]
-  branch = "master"
+  digest = "1:e5003c19d396d8b3cf1324ea0bf49b00f13e9466d0297d1268b641f1c617c3a2"
   name = "github.com/cloudflare/brotli-go"
   packages = ["."]
+  pruneopts = "T"
   revision = "18c9f6c67e3dfc12e0ddaca748d2887f97a7ac28"
 
+[[projects]]
+  digest = "1:6dbb2bbc7e6333e691c4d82fd86485f0695a35902fbb9b2df5f72e22ab0040f3"
+  name = "github.com/cloudflare/golibs"
+  packages = ["lrucache"]
+  pruneopts = "UT"
+  revision = "333127dbecfcc23a8db7d9a4f52785d23aff44a1"
+
 [[projects]]
   branch = "master"
+  digest = "1:05756b73bf7eae03d6f6c5f0ae83de42ce296e7d83336563dd9ce2072106d5e6"
+  name = "github.com/cloudflare/golz4"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "ef862a3cdc58a6f1fee4e3af3d44fbe279194cde"
+
+[[projects]]
+  digest = "1:3f9506ee991cdee1f05bf0cd3e34b5cd922dc00d6a950fb4beb4e07ab1c4d3d1"
   name = "github.com/coredns/coredns"
   packages = [
     "core/dnsserver",
@@ -52,52 +90,50 @@
     "plugin/pkg/uniq",
     "plugin/pkg/watch",
     "plugin/test",
-    "request"
+    "request",
   ]
-  revision = "992e7928c7c258628d2b13b769acc86781b9faea"
+  pruneopts = "UT"
+  revision = "2e322f6e8a54f18c6aef9c25a7c432c291a3d9f7"
+  version = "v1.2.0"
 
 [[projects]]
-  branch = "master"
+  branch = "v2"
+  digest = "1:ca6ce07b0d28c6044411b9c966cd845233e27c2ff91d08a3a869631f329c9918"
   name = "github.com/coreos/go-oidc"
-  packages = [
-    "http",
-    "jose",
-    "key",
-    "oauth2",
-    "oidc"
-  ]
-  revision = "a93f71fdfe73d2c0f5413c0565eea0af6523a6df"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "274971e2c94cd6fb17614979e2899edbc81af146"
 
 [[projects]]
+  digest = "1:1da3a221f0bc090792d3a2a080ff09008427c0e0f0533a4ed6abd8994421da73"
   name = "github.com/coreos/go-systemd"
   packages = ["daemon"]
-  revision = "39ca1b05acc7ad1220e09f133283b8859a8b71ab"
-  version = "v17"
-
-[[projects]]
-  name = "github.com/coreos/pkg"
-  packages = [
-    "health",
-    "httputil",
-    "timeutil"
-  ]
-  revision = "97fdf19511ea361ae1c100dd393cc47f8dcfa1e1"
-  version = "v4"
+  pruneopts = "UT"
+  revision = "95778dfbb74eb7e4dbaf43bf7d71809650ef8076"
+  version = "v19"
 
 [[projects]]
+  digest = "1:ffe9824d294da03b391f44e1ae8281281b4afc1bdaa9588c9097785e3af10cec"
   name = "github.com/davecgh/go-spew"
   packages = ["spew"]
-  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
-  version = "v1.1.0"
+  pruneopts = "UT"
+  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
+  version = "v1.1.1"
 
 [[projects]]
   branch = "master"
-  name = "github.com/elgs/gosqljson"
-  packages = ["."]
-  revision = "027aa4915315a0b2825c0f025cea347829b974fa"
+  digest = "1:27cbe99893a40975358d20736d80adc95ef395d3bf5923f802f3de259533c94a"
+  name = "github.com/denisenkom/go-mssqldb"
+  packages = [
+    ".",
+    "internal/cp",
+    "internal/querytext",
+  ]
+  pruneopts = "UT"
+  revision = "11b2859924c1e3c3da056fd4e0976b93883f3545"
 
 [[projects]]
-  branch = "master"
+  digest = "1:d4268b2a09b1f736633577c4ac93f2a5356c73742fff5344e2451aeec60a7ad0"
   name = "github.com/equinox-io/equinox"
   packages = [
     ".",
@@ -105,229 +141,380 @@
     "internal/go-update/internal/binarydist",
     "internal/go-update/internal/osext",
     "internal/osext",
-    "proto"
+    "proto",
   ]
-  revision = "f24972fa72facf59d05c91c848b65eac38815915"
+  pruneopts = "UT"
+  revision = "5205c98a6c11dc72747ce12fff6cd620a99fde05"
+  version = "v1.2.0"
 
 [[projects]]
-  branch = "master"
+  digest = "1:433763f10d88dba9b533a7ea2fe9f5ee11e57e00306eb97a1f6090fd978e8fa1"
   name = "github.com/facebookgo/grace"
   packages = ["gracenet"]
+  pruneopts = "UT"
   revision = "75cf19382434e82df4dd84953f566b8ad23d6e9e"
 
+[[projects]]
+  digest = "1:296cda2c4a6a7a54964d7b3b0815e2aed215da75217b72033060ffb1c4e4b6ae"
+  name = "github.com/felixge/httpsnoop"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "eadd4fad6aac69ae62379194fe0219f3dbc80fd3"
+  version = "v1.0.0"
+
 [[projects]]
   branch = "master"
+  digest = "1:50a46ab1d5edbbdd55125b4d37f1bf503d0807c26461f9ad7b358d6006641d09"
   name = "github.com/flynn/go-shlex"
   packages = ["."]
+  pruneopts = "UT"
   revision = "3f9db97f856818214da2e1057f8ad84803971cff"
 
 [[projects]]
-  branch = "master"
+  digest = "1:d4623fc7bf7e281d9107367cc4a9e76ed3e86b1eec1a4e30630c870bef1fedd0"
   name = "github.com/getsentry/raven-go"
   packages = ["."]
+  pruneopts = "UT"
   revision = "ed7bcb39ff10f39ab08e317ce16df282845852fa"
 
+[[projects]]
+  digest = "1:ec6f9bf5e274c833c911923c9193867f3f18788c461f76f05f62bb1510e0ae65"
+  name = "github.com/go-sql-driver/mysql"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "72cd26f257d44c1114970e19afddcd812016007e"
+  version = "v1.4.1"
+
 [[projects]]
   branch = "master"
+  digest = "1:3e6afc3ed8a72949aa735c00fddc23427dc9384ccfd51cf0d91a412e668da632"
   name = "github.com/golang-collections/collections"
   packages = ["queue"]
+  pruneopts = "UT"
   revision = "604e922904d35e97f98a774db7881f049cd8d970"
 
 [[projects]]
+  branch = "master"
+  digest = "1:01745416ed734d0dbd8f2a25344536e399ee60319654873da12b107e9e3cb309"
+  name = "github.com/golang/gddo"
+  packages = ["httputil/header"]
+  pruneopts = "UT"
+  revision = "af0f2af80721261f4d211b2c9563f7b46b2aab06"
+
+[[projects]]
+  digest = "1:239c4c7fd2159585454003d9be7207167970194216193a8a210b8d29576f19c9"
   name = "github.com/golang/protobuf"
   packages = [
     "proto",
     "ptypes",
     "ptypes/any",
     "ptypes/duration",
-    "ptypes/timestamp"
+    "ptypes/timestamp",
   ]
-  revision = "b4deda0973fb4c70b50d226b1af49f3da59f5265"
-  version = "v1.1.0"
+  pruneopts = "UT"
+  revision = "b5d812f8a3706043e23a9cd5babf2e5423744d30"
+  version = "v1.3.1"
 
 [[projects]]
+  digest = "1:582b704bebaa06b48c29b0cec224a6058a09c86883aaddabde889cd1a5f73e1b"
   name = "github.com/google/uuid"
   packages = ["."]
-  revision = "064e2069ce9c359c118179501254f67d7d37ba24"
-  version = "0.2"
-
-[[projects]]
-  name = "github.com/gorilla/context"
-  packages = ["."]
-  revision = "08b5f424b9271eedf6f9f0ce86cb9396ed337a42"
+  pruneopts = "UT"
+  revision = "0cd6bf5da1e1c83f8b45653022c74f71af0538a4"
   version = "v1.1.1"
 
 [[projects]]
+  digest = "1:d5f97fc268267ec1b61c3453058c738246fc3e746f14b1ae25161513b7367b0c"
   name = "github.com/gorilla/mux"
   packages = ["."]
-  revision = "e3702bed27f0d39777b0b37b664b6280e8ef8fbf"
-  version = "v1.6.2"
+  pruneopts = "UT"
+  revision = "c5c6c98bc25355028a63748a498942a6398ccd22"
+  version = "v1.7.1"
 
 [[projects]]
+  digest = "1:43dd08a10854b2056e615d1b1d22ac94559d822e1f8b6fcc92c1a1057e85188e"
   name = "github.com/gorilla/websocket"
   packages = ["."]
+  pruneopts = "UT"
   revision = "ea4d1f681babbce9545c9c5f3d5194a789c89f5b"
   version = "v1.2.0"
 
 [[projects]]
   branch = "master"
+  digest = "1:1a1206efd03a54d336dce7bb8719e74f2f8932f661cb9f57d5813a1d99c083d8"
   name = "github.com/grpc-ecosystem/grpc-opentracing"
   packages = ["go/otgrpc"]
+  pruneopts = "UT"
   revision = "8e809c8a86450a29b90dcc9efbf062d0fe6d9746"
 
 [[projects]]
-  name = "github.com/jonboulle/clockwork"
-  packages = ["."]
-  revision = "2eee05ed794112d45db504eb05aa693efd2b8b09"
-  version = "v0.1.0"
+  digest = "1:6c41d4f998a03b6604227ccad36edaed6126c397e5d78709ef4814a1145a6757"
+  name = "github.com/jmoiron/sqlx"
+  packages = [
+    ".",
+    "reflectx",
+  ]
+  pruneopts = "UT"
+  revision = "d161d7a76b5661016ad0b085869f77fd410f3e6a"
+  version = "v1.2.0"
 
 [[projects]]
-  branch = "master"
+  digest = "1:31e761d97c76151dde79e9d28964a812c46efc5baee4085b86f68f0c654450de"
+  name = "github.com/konsorten/go-windows-terminal-sequences"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "f55edac94c9bbba5d6182a4be46d86a2c9b5b50e"
+  version = "v1.0.2"
+
+[[projects]]
+  digest = "1:177a18252d40bf39a867876456854717780b0b1212fdae231d31e93b6f885d80"
+  name = "github.com/kshvakov/clickhouse"
+  packages = [
+    ".",
+    "lib/binary",
+    "lib/cityhash102",
+    "lib/column",
+    "lib/data",
+    "lib/leakypool",
+    "lib/lz4",
+    "lib/protocol",
+    "lib/types",
+    "lib/writebuffer",
+  ]
+  pruneopts = "UT"
+  revision = "43e176a8d165376662f4d67203c71cc8a027c86b"
+  version = "v1.3.9"
+
+[[projects]]
+  digest = "1:12cb143f2148bf54bcd9fe622abac17325e85eeb1d84b8ec6caf1c80232108fd"
   name = "github.com/lib/pq"
   packages = [
     ".",
-    "oid"
+    "oid",
+    "scram",
   ]
-  revision = "90697d60dd844d5ef6ff15135d0203f65d2f53b8"
+  pruneopts = "UT"
+  revision = "3427c32cb71afc948325f299f040e53c1dd78979"
+  version = "v1.2.0"
 
 [[projects]]
+  digest = "1:2fa7b0155cd54479a755c629de26f888a918e13f8857a2c442205d825368e084"
   name = "github.com/mattn/go-colorable"
   packages = ["."]
-  revision = "167de6bfdfba052fa6b2d3664c8f5272e23c9072"
-  version = "v0.0.9"
+  pruneopts = "UT"
+  revision = "3a70a971f94a22f2fa562ffcc7a0eb45f5daf045"
+  version = "v0.1.1"
 
 [[projects]]
+  digest = "1:e150b5fafbd7607e2d638e4e5cf43aa4100124e5593385147b0a74e2733d8b0d"
   name = "github.com/mattn/go-isatty"
   packages = ["."]
-  revision = "0360b2af4f38e8d38c7fce2a9f4e702702d73a39"
-  version = "v0.0.3"
+  pruneopts = "UT"
+  revision = "c2a7a6ca930a4cd0bc33a3f298eb71960732a3a7"
+  version = "v0.0.7"
 
 [[projects]]
+  digest = "1:79e87abf06b873987dee86598950f5b51732ac454d5a5cab6445a14330e6c9e3"
+  name = "github.com/mattn/go-sqlite3"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "b612a2feea6aa87c6d052d9086572551df06497e"
+  version = "v1.11.0"
+
+[[projects]]
+  digest = "1:ff5ebae34cfbf047d505ee150de27e60570e8c394b3b8fdbb720ff6ac71985fc"
   name = "github.com/matttproud/golang_protobuf_extensions"
   packages = ["pbutil"]
+  pruneopts = "UT"
   revision = "c12348ce28de40eed0136aa2b644d0ee0650e56c"
   version = "v1.0.1"
 
 [[projects]]
-  branch = "master"
+  digest = "1:75fa16a231ef40da3e462d651c20b9df20bde0777bdc1ac0982242c79057ee71"
   name = "github.com/mholt/caddy"
   packages = [
     ".",
     "caddyfile",
-    "telemetry"
+    "telemetry",
   ]
+  pruneopts = "UT"
   revision = "d3b731e9255b72d4571a5aac125634cf1b6031dc"
 
 [[projects]]
+  digest = "1:2b4b4b2e5544c2a11a486c1b631357aa2ddf766e50c1b2483cf809da2c511234"
   name = "github.com/miekg/dns"
   packages = ["."]
-  revision = "5a2b9fab83ff0f8bfc99684bd5f43a37abe560f1"
-  version = "v1.0.8"
+  pruneopts = "UT"
+  revision = "73601d4aed9d844322611759d7f3619110b7c88e"
+  version = "v1.1.8"
 
 [[projects]]
-  branch = "master"
+  digest = "1:5d231480e1c64a726869bc4142d270184c419749d34f167646baa21008eb0a79"
   name = "github.com/mitchellh/go-homedir"
   packages = ["."]
-  revision = "3864e76763d94a6df2f9960b16a20a33da9f9a66"
+  pruneopts = "UT"
+  revision = "af06845cf3004701891bf4fdb884bfe4920b3727"
+  version = "v1.1.0"
 
 [[projects]]
+  digest = "1:dd3d50b46f8d3c88a8d3986f2e5344db582c457469a7cb3a0dda953c669cdf9a"
+  name = "github.com/mitchellh/go-server-timing"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "1ca01db910d57d64ec1c68f27105614b77558e28"
+  version = "v1.0.0"
+
+[[projects]]
+  digest = "1:53bc4cd4914cd7cd52139990d5170d6dc99067ae31c56530621b18b35fc30318"
+  name = "github.com/mitchellh/mapstructure"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "3536a929edddb9a5b34bd6861dc4a9647cb459fe"
+  version = "v1.1.2"
+
+[[projects]]
+  digest = "1:11e62d6050198055e6cd87ed57e5d8c669e84f839c16e16f192374d913d1a70d"
   name = "github.com/opentracing/opentracing-go"
   packages = [
     ".",
     "ext",
-    "log"
+    "log",
   ]
-  revision = "1949ddbfd147afd4d964a9f00b24eb291e0e7c38"
-  version = "v1.0.2"
+  pruneopts = "UT"
+  revision = "659c90643e714681897ec2521c60567dd21da733"
+  version = "v1.1.0"
 
 [[projects]]
+  digest = "1:40e195917a951a8bf867cd05de2a46aaf1806c50cf92eebf4c16f78cd196f747"
   name = "github.com/pkg/errors"
   packages = ["."]
+  pruneopts = "UT"
   revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
   version = "v0.8.0"
 
 [[projects]]
+  digest = "1:0028cb19b2e4c3112225cd871870f2d9cf49b9b4276531f03438a88e94be86fe"
   name = "github.com/pmezard/go-difflib"
   packages = ["difflib"]
+  pruneopts = "UT"
   revision = "792786c7400a136282c1664665ae0a8db921c6c2"
   version = "v1.0.0"
 
 [[projects]]
+  branch = "master"
+  digest = "1:bd9efe4e0b0f768302a1e2f0c22458149278de533e521206e5ddc71848c269a0"
+  name = "github.com/pquerna/cachecontrol"
+  packages = [
+    ".",
+    "cacheobject",
+  ]
+  pruneopts = "UT"
+  revision = "1555304b9b35fdd2b425bccf1a5613677705e7d0"
+
+[[projects]]
+  digest = "1:c968b29db5d68ec97de404b6d058d5937fa015a141b3b4f7a0d87d5f8226f04c"
   name = "github.com/prometheus/client_golang"
   packages = [
     "prometheus",
-    "prometheus/promhttp"
+    "prometheus/promhttp",
   ]
+  pruneopts = "UT"
   revision = "967789050ba94deca04a5e84cce8ad472ce313c1"
   version = "v0.9.0-pre1"
 
 [[projects]]
   branch = "master"
+  digest = "1:2d5cd61daa5565187e1d96bae64dbbc6080dacf741448e9629c64fd93203b0d4"
   name = "github.com/prometheus/client_model"
   packages = ["go"]
-  revision = "99fa1f4be8e564e8a6b613da7fa6f46c9edafc6c"
+  pruneopts = "UT"
+  revision = "fd36f4220a901265f90734c3183c5f0c91daa0b8"
 
 [[projects]]
-  branch = "master"
+  digest = "1:35cf6bdf68db765988baa9c4f10cc5d7dda1126a54bd62e252dbcd0b1fc8da90"
   name = "github.com/prometheus/common"
   packages = [
     "expfmt",
     "internal/bitbucket.org/ww/goautoneg",
-    "model"
+    "model",
   ]
-  revision = "7600349dcfe1abd18d72d3a1770870d9800a7801"
+  pruneopts = "UT"
+  revision = "a82f4c12f983cc2649298185f296632953e50d3e"
+  version = "v0.3.0"
 
 [[projects]]
   branch = "master"
+  digest = "1:49b09905e781d7775c086604cc00083e1832d0783f1f421b79f42657c457d029"
   name = "github.com/prometheus/procfs"
-  packages = [
-    ".",
-    "internal/util",
-    "nfs",
-    "xfs"
-  ]
-  revision = "ae68e2d4c00fed4943b5f6698d504a5fe083da8a"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "8368d24ba045f26503eb745b624d930cbe214c79"
 
 [[projects]]
+  digest = "1:1a23fdd843129ef761ffe7651bc5fe7c5b09fbe933e92783ab06cc11c37b7b37"
   name = "github.com/rifflock/lfshook"
   packages = ["."]
-  revision = "bf539943797a1f34c1f502d07de419b5238ae6c6"
-  version = "v2.3"
+  pruneopts = "UT"
+  revision = "b9218ef580f59a2e72dad1aa33d660150445d05a"
+  version = "v2.4"
 
 [[projects]]
+  digest = "1:04457f9f6f3ffc5fea48e71d62f2ca256637dee0a04d710288e27e05c8b41976"
   name = "github.com/sirupsen/logrus"
   packages = ["."]
-  revision = "c155da19408a8799da419ed3eeb0cb5db0ad5dbc"
-  version = "v1.0.5"
+  pruneopts = "UT"
+  revision = "839c75faf7f98a33d445d181f3018b5c3409a45e"
+  version = "v1.4.2"
 
 [[projects]]
+  digest = "1:7e8d267900c7fa7f35129a2a37596e38ed0f11ca746d6d9ba727980ee138f9f6"
   name = "github.com/stretchr/testify"
-  packages = ["assert"]
-  revision = "f35b8ab0b5a2cef36673838d662e249dd9c94686"
-  version = "v1.2.2"
+  packages = [
+    "assert",
+    "require",
+  ]
+  pruneopts = "UT"
+  revision = "12b6f73e6084dad08a7c6e575284b177ecafbc71"
+  version = "v1.2.1"
 
 [[projects]]
   branch = "master"
+  digest = "1:cac263b8eb2e9ad2327b70e03be1de1227040bfb3be26b49c4b56cbed568afc7"
+  name = "github.com/xo/dburl"
+  packages = ["."]
+  pruneopts = "UT"
+  revision = "98997a05b24fc069c79fa13b05ccf376c22a326c"
+
+[[projects]]
+  branch = "master"
+  digest = "1:1a9391a80fe548ffcf90aee8ae35bfb0b188198b57a3fe2ef5bb099ba4b4f610"
   name = "golang.org/x/crypto"
   packages = [
     "curve25519",
     "ed25519",
     "ed25519/internal/edwards25519",
+    "internal/chacha20",
     "internal/subtle",
+    "md4",
     "nacl/box",
     "nacl/secretbox",
+    "pbkdf2",
     "poly1305",
     "salsa20/salsa",
-    "ssh/terminal"
+    "ssh",
+    "ssh/terminal",
   ]
-  revision = "a49355c7e3f8fe157a85be2f77e6e269a0f89602"
+  pruneopts = "UT"
+  revision = "f416ebab96af27ca70b6e5c23d6a0747530da626"
 
 [[projects]]
   branch = "master"
+  digest = "1:6b3dbfffba73ea0d8131ecb5738fe87f6addc4c7b73154b9d58e2693ad6a6256"
   name = "golang.org/x/net"
   packages = [
     "bpf",
     "context",
+    "context/ctxhttp",
     "http/httpguts",
     "http2",
     "http2/hpack",
@@ -338,30 +525,47 @@
     "ipv4",
     "ipv6",
     "trace",
-    "websocket"
+    "websocket",
   ]
-  revision = "32a936f46389aa10549d60bd7833e54b01685d09"
+  pruneopts = "UT"
+  revision = "1da14a5a36f220ea3f03470682b737b1dfd5de22"
 
 [[projects]]
   branch = "master"
+  digest = "1:8d1c112fb1679fa097e9a9255a786ee47383fa2549a3da71bcb1334a693ebcfe"
+  name = "golang.org/x/oauth2"
+  packages = [
+    ".",
+    "internal",
+  ]
+  pruneopts = "UT"
+  revision = "0f29369cfe4552d0e4bcddc57cc75f4d7e672a33"
+
+[[projects]]
+  digest = "1:39ebcc2b11457b703ae9ee2e8cca0f68df21969c6102cb3b705f76cca0ea0239"
   name = "golang.org/x/sync"
   packages = ["errgroup"]
+  pruneopts = "UT"
   revision = "1d60e4601c6fd243af51cc01ddf169918a5407ca"
 
 [[projects]]
   branch = "master"
+  digest = "1:77751d02e939d7078faedaeec10c09af575a09c528d84d18f2cb45a84bd1889a"
   name = "golang.org/x/sys"
   packages = [
+    "cpu",
     "unix",
     "windows",
     "windows/registry",
     "windows/svc",
     "windows/svc/eventlog",
-    "windows/svc/mgr"
+    "windows/svc/mgr",
   ]
-  revision = "ce36f3865eeb42541ce3f87f32f8462c5687befa"
+  pruneopts = "UT"
+  revision = "12500544f89f9420afe9529ba8940bf72d294972"
 
 [[projects]]
+  digest = "1:a2ab62866c75542dd18d2b069fec854577a20211d7c0ea6ae746072a1dccdd18"
   name = "golang.org/x/text"
   packages = [
     "collate",
@@ -377,34 +581,63 @@
     "unicode/bidi",
     "unicode/cldr",
     "unicode/norm",
-    "unicode/rangetable"
+    "unicode/rangetable",
   ]
+  pruneopts = "UT"
   revision = "f21a4dfb5e38f5895301dc265a8def02365cc3d0"
   version = "v0.3.0"
 
 [[projects]]
-  branch = "master"
-  name = "google.golang.org/genproto"
-  packages = ["googleapis/rpc/status"]
-  revision = "ff3583edef7de132f219f0efc00e097cabcc0ec0"
+  digest = "1:7e8b9c5ae49011b12ae8473834ac1a7bb8ac029ba201270c723e4c280c9e4855"
+  name = "google.golang.org/appengine"
+  packages = [
+    "cloudsql",
+    "internal",
+    "internal/base",
+    "internal/datastore",
+    "internal/log",
+    "internal/remote_api",
+    "internal/urlfetch",
+    "urlfetch",
+  ]
+  pruneopts = "UT"
+  revision = "b2f4a3cf3c67576a2ee09e1fe62656a5086ce880"
+  version = "v1.6.1"
 
 [[projects]]
+  branch = "master"
+  digest = "1:c3076e7defee87de1236f1814beb588f40a75544c60121e6eb38b3b3721783e2"
+  name = "google.golang.org/genproto"
+  packages = ["googleapis/rpc/status"]
+  pruneopts = "UT"
+  revision = "d1146b9035b912113a38af3b138eb2af567b2c67"
+
+[[projects]]
+  digest = "1:31d87f39886fb38a2b6c097ff3b9f985d6960772170d64a68246f7790e955746"
   name = "google.golang.org/grpc"
   packages = [
     ".",
     "balancer",
     "balancer/base",
     "balancer/roundrobin",
+    "binarylog/grpc_binarylog_v1",
     "codes",
     "connectivity",
     "credentials",
+    "credentials/internal",
     "encoding",
     "encoding/proto",
     "grpclog",
     "internal",
     "internal/backoff",
+    "internal/balancerload",
+    "internal/binarylog",
     "internal/channelz",
+    "internal/envconfig",
     "internal/grpcrand",
+    "internal/grpcsync",
+    "internal/syscall",
+    "internal/transport",
     "keepalive",
     "metadata",
     "naming",
@@ -415,28 +648,53 @@
     "stats",
     "status",
     "tap",
-    "transport"
   ]
-  revision = "168a6198bcb0ef175f7dacec0b8691fc141dc9b8"
-  version = "v1.13.0"
+  pruneopts = "UT"
+  revision = "236199dd5f8031d698fb64091194aecd1c3895b2"
+  version = "v1.20.0"
+
+[[projects]]
+  branch = "v1"
+  digest = "1:6f70106e7bc1c803e8a0a4519e09c12d154771acfa2559206e97b033bbd1dd38"
+  name = "gopkg.in/coreos/go-oidc.v1"
+  packages = ["jose"]
+  pruneopts = "UT"
+  revision = "e860bd55bfa7d7cb35d30d26a167982584f616b0"
+
+[[projects]]
+  digest = "1:8c05919580be8a5be668709d7e5a69d5cd19b8ee9f23d62ce5b10d3457bf6a13"
+  name = "gopkg.in/square/go-jose.v2"
+  packages = [
+    ".",
+    "cipher",
+    "json",
+  ]
+  pruneopts = "UT"
+  revision = "730df5f748271903322feb182be83b43ebbbe27d"
+  version = "v2.3.1"
 
 [[projects]]
   branch = "altsrc-parse-durations"
+  digest = "1:0370b1bceda03dbfade3abbde639a43f1113bab711ec760452e5c0dcc0c14787"
   name = "gopkg.in/urfave/cli.v2"
   packages = [
     ".",
-    "altsrc"
+    "altsrc",
   ]
+  pruneopts = "UT"
   revision = "d604b6ffeee878fbf084fd2761466b6649989cee"
   source = "https://github.com/cbranch/cli"
 
 [[projects]]
+  digest = "1:4d2e5a73dc1500038e504a8d78b986630e3626dc027bc030ba5c75da257cdb96"
   name = "gopkg.in/yaml.v2"
   packages = ["."]
-  revision = "5420a8b6744d3b0345ab293f6fcba19c978f1183"
-  version = "v2.2.1"
+  pruneopts = "UT"
+  revision = "51d6538a90f86fe93ac480b35f37b2be17fef232"
+  version = "v2.2.2"
 
 [[projects]]
+  digest = "1:8ffc3ddc31414c0a71220957bb723b16510d7fcb5b3880dc0da4cf6d39c31642"
   name = "zombiezen.com/go/capnproto2"
   packages = [
     ".",
@@ -452,8 +710,9 @@
     "rpc/internal/refcount",
     "schemas",
     "server",
-    "std/capnp/rpc"
+    "std/capnp/rpc",
   ]
+  pruneopts = "UT"
   revision = "7cfd211c19c7f5783c695f3654efa46f0df259c3"
   source = "https://github.com/zombiezen/go-capnproto2"
   version = "v2.17.1"
@@ -461,6 +720,69 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "0907565b36c43c6a1c461648f1e69d0367864b61f112e01948f7b008e44598e5"
+  input-imports = [
+    "github.com/DATA-DOG/go-sqlmock",
+    "github.com/cloudflare/brotli-go",
+    "github.com/cloudflare/golibs/lrucache",
+    "github.com/coredns/coredns/core/dnsserver",
+    "github.com/coredns/coredns/plugin",
+    "github.com/coredns/coredns/plugin/cache",
+    "github.com/coredns/coredns/plugin/metrics/vars",
+    "github.com/coredns/coredns/plugin/pkg/dnstest",
+    "github.com/coredns/coredns/plugin/pkg/rcode",
+    "github.com/coredns/coredns/request",
+    "github.com/coreos/go-oidc",
+    "github.com/coreos/go-systemd/daemon",
+    "github.com/denisenkom/go-mssqldb",
+    "github.com/equinox-io/equinox",
+    "github.com/facebookgo/grace/gracenet",
+    "github.com/getsentry/raven-go",
+    "github.com/go-sql-driver/mysql",
+    "github.com/golang-collections/collections/queue",
+    "github.com/google/uuid",
+    "github.com/gorilla/mux",
+    "github.com/gorilla/websocket",
+    "github.com/jmoiron/sqlx",
+    "github.com/kshvakov/clickhouse",
+    "github.com/lib/pq",
+    "github.com/mattn/go-colorable",
+    "github.com/mattn/go-sqlite3",
+    "github.com/miekg/dns",
+    "github.com/mitchellh/go-homedir",
+    "github.com/mitchellh/go-server-timing",
+    "github.com/mitchellh/mapstructure",
+    "github.com/pkg/errors",
+    "github.com/prometheus/client_golang/prometheus",
+    "github.com/prometheus/client_golang/prometheus/promhttp",
+    "github.com/rifflock/lfshook",
+    "github.com/sirupsen/logrus",
+    "github.com/stretchr/testify/assert",
+    "github.com/stretchr/testify/require",
+    "github.com/xo/dburl",
+    "golang.org/x/crypto/nacl/box",
+    "golang.org/x/crypto/ssh",
+    "golang.org/x/crypto/ssh/terminal",
+    "golang.org/x/net/context",
+    "golang.org/x/net/http2",
+    "golang.org/x/net/http2/hpack",
+    "golang.org/x/net/idna",
+    "golang.org/x/net/trace",
+    "golang.org/x/net/websocket",
+    "golang.org/x/sync/errgroup",
+    "golang.org/x/sys/windows",
+    "golang.org/x/sys/windows/svc",
+    "golang.org/x/sys/windows/svc/eventlog",
+    "golang.org/x/sys/windows/svc/mgr",
+    "gopkg.in/coreos/go-oidc.v1/jose",
+    "gopkg.in/urfave/cli.v2",
+    "gopkg.in/urfave/cli.v2/altsrc",
+    "zombiezen.com/go/capnproto2",
+    "zombiezen.com/go/capnproto2/encoding/text",
+    "zombiezen.com/go/capnproto2/pogs",
+    "zombiezen.com/go/capnproto2/rpc",
+    "zombiezen.com/go/capnproto2/schemas",
+    "zombiezen.com/go/capnproto2/server",
+    "zombiezen.com/go/capnproto2/std/capnp/rpc",
+  ]
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -6,39 +6,37 @@
     name = "github.com/cloudflare/brotli-go"
     unused-packages = false
 
-
-
 [[constraint]]
   name = "github.com/facebookgo/grace"
-  branch = "master"
+  revision = "75cf19382434e82df4dd84953f566b8ad23d6e9e"
 
 [[constraint]]
   name = "github.com/getsentry/raven-go"
-  branch = "master"
+  revision = "ed7bcb39ff10f39ab08e317ce16df282845852fa"
 
 [[constraint]]
   name = "github.com/pkg/errors"
-  version = "0.8.0"
+  version = "=0.8.0"
 
 [[constraint]]
   name = "github.com/prometheus/client_golang"
-  version = "0.9.0-pre1"
+  version = "=0.9.0-pre1"
 
 [[constraint]]
   name = "github.com/sirupsen/logrus"
-  version = "1.0.3"
+  version = "=1.4.2"
 
 [[constraint]]
   name = "github.com/stretchr/testify"
-  version = "1.2.1"
+  version = "=1.2.1"
 
 [[constraint]]
   name = "golang.org/x/net"
-  branch = "master"
+  branch = "master"  # master required by github.com/miekg/dns
 
 [[constraint]]
   name = "golang.org/x/sync"
-  branch = "master"
+  revision = "1d60e4601c6fd243af51cc01ddf169918a5407ca"
 
 [[constraint]]
   name = "gopkg.in/urfave/cli.v2"
@@ -48,27 +46,72 @@
 [[constraint]]
   name = "zombiezen.com/go/capnproto2"
   source = "https://github.com/zombiezen/go-capnproto2"
+  version = "=2.17.1"
 
 [[constraint]]
   name = "github.com/gorilla/websocket"
-  version = "1.2.0"
+  version = "=1.2.0"
 
 [[constraint]]
   name = "github.com/coredns/coredns"
-  branch = "master"
+  version = "=1.2.0"
+
+[[constraint]]
+  name = "github.com/miekg/dns"
+  version = "=1.1.8"
 
 [[constraint]]
   name = "github.com/cloudflare/brotli-go"
-  branch = "master"
+  revision = "18c9f6c67e3dfc12e0ddaca748d2887f97a7ac28"
 
 [[override]]
   name = "github.com/mholt/caddy"
-  branch = "master"
+  revision = "d3b731e9255b72d4571a5aac125634cf1b6031dc"
 
 [[constraint]]
-  branch = "master"
-  name = "github.com/coreos/go-oidc"
-
-[[constraint]]
-  branch = "master"
   name = "golang.org/x/crypto"
+  branch = "master"  # master required by github.com/miekg/dns
+
+[[constraint]]
+  name = "github.com/cloudflare/golibs"
+  revision = "333127dbecfcc23a8db7d9a4f52785d23aff44a1"
+
+[[constraint]]
+  name = "github.com/google/uuid"
+  version = "=1.1.1"
+
+[[constraint]]
+  name = "github.com/mitchellh/mapstructure"
+  version = "1.1.2"
+
+[[constraint]]
+  name = "github.com/jmoiron/sqlx"
+  version = "1.2.0"
+
+[[constraint]]
+  name = "github.com/go-sql-driver/mysql"
+  version = "1.4.1"
+
+[[constraint]]
+  name = "github.com/mattn/go-sqlite3"
+  version = "1.11.0"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/denisenkom/go-mssqldb"
+
+[[constraint]]
+  name = "github.com/kshvakov/clickhouse"
+  version = "1.3.9"
+
+[[constraint]]
+  name = "github.com/DATA-DOG/go-sqlmock"
+  version = "1.3.3"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/xo/dburl"
+
+[[constraint]]
+  branch = "v2"
+  name = "github.com/coreos/go-oidc"

Makefile

@@ -16,15 +16,27 @@ ifeq ($(EQUINOX_IS_DRAFT), true)
 	EQUINOX_FLAGS := --draft $(EQUINOX_FLAGS)
 endif
 
+ifeq ($(GOARCH),)
+	GOARCH := amd64
+endif
+
 .PHONY: all
 all: cloudflared test
 
+.PHONY: clean
+clean:
+	go clean
+
 .PHONY: cloudflared
-cloudflared:
+cloudflared: tunnel-deps
 	go build -v $(VERSION_FLAGS) $(IMPORT_PATH)/cmd/cloudflared
 
+.PHONY: container
+container:
+	docker build -t cloudflare/cloudflared:"$(VERSION)" .
+
 .PHONY: test
-test:
+test: vet
 	go test -v -race $(VERSION_FLAGS) ./...
 
 .PHONY: cloudflared-deb
@@ -32,7 +44,7 @@ cloudflared-deb: cloudflared
 	mkdir -p $(PACKAGE_DIR)
 	cp cloudflared $(PACKAGE_DIR)/cloudflared
 	fakeroot fpm -C $(PACKAGE_DIR) -s dir -t deb --deb-compression bzip2 \
-		-a $(GOARCH) -v $(VERSION) -n cloudflared
+		-a $(GOARCH) -v $(VERSION) -n cloudflared cloudflared=/usr/local/bin/
 
 .PHONY: cloudflared-darwin-amd64.tgz
 cloudflared-darwin-amd64.tgz: cloudflared
@@ -43,8 +55,8 @@ cloudflared-darwin-amd64.tgz: cloudflared
 homebrew-upload: cloudflared-darwin-amd64.tgz
 	aws s3 --endpoint-url $(S3_ENDPOINT) cp --acl public-read $$^ $(S3_URI)/cloudflared-$$(VERSION)-$1.tgz
 	aws s3 --endpoint-url $(S3_ENDPOINT) cp --acl public-read $(S3_URI)/cloudflared-$$(VERSION)-$1.tgz  $(S3_URI)/cloudflared-stable-$1.tgz
-		
-.PHONY: homebrew-release 
+
+.PHONY: homebrew-release
 homebrew-release: homebrew-upload
 	./publish-homebrew-formula.sh cloudflared-darwin-amd64.tgz $(VERSION) homebrew-cloudflare
 
@@ -55,3 +67,17 @@ release: bin/equinox
 bin/equinox:
 	mkdir -p bin
 	curl -s https://bin.equinox.io/c/75JtLRTsJ3n/release-tool-beta-$(EQUINOX_PLATFORM).tgz | tar xz -C bin/
+
+.PHONY: tunnel-deps
+tunnel-deps: tunnelrpc/tunnelrpc.capnp.go
+
+tunnelrpc/tunnelrpc.capnp.go: tunnelrpc/tunnelrpc.capnp
+	which capnp  # https://capnproto.org/install.html
+	which capnpc-go  # go get zombiezen.com/go/capnproto2/capnpc-go
+	capnp compile -ogo tunnelrpc/tunnelrpc.capnp
+
+.PHONY: vet
+vet:
+	go vet ./...
+	which go-sumtype  # go get github.com/BurntSushi/go-sumtype
+	go-sumtype $$(go list ./...)

RELEASE_NOTES

@@ -1,10 +1,166 @@
-2018.9.0
-- 2018-07-30 TUN-801: Rapid SQL Proxy
-- 2018-08-20 Fixed name bug
-- 2018-08-21 Added interactive password & refactored naming
-- 2018-07-30 TUN-801: Fixed SQL Gateway Dependencies
-- 2018-08-21 Ascii art for Cloudflared
-- 2018-08-27 TUN-833: Don't log system root certificate loading failure on Windows
+2019.8.3
+- 2019-08-20 STOR-519: Add db-connect, a SQL over HTTPS server
+- 2019-08-20 Release 2019.8.2
+- 2019-08-20 Revert "AUTH-1941: Adds initial SSH server implementation"
+- 2019-08-11 TUN-2163: Add GrapQLType method to Scope interface
+- 2019-08-06 TUN-2152: Requests with a query in the URL are erroneously escaped
+- 2019-07-18 AUTH-1941: Adds initial SSH server implementation
+
+2019.8.1
+- 2019-08-05 TUN-2111: Implement custom serialization logic for FallibleConfig and OriginConfig
+- 2019-08-06 Revert "TUN-1736: Missing headers when passing an invalid path"
+
+2019.8.0
+- 2019-07-11 TUN-1956: Go 1.12 update
+- 2019-07-24 TUN-1736: Missing headers when passing an invalid path
+- 2019-07-30 TUN-2117: read group/system-name from CLI, send it to edge
+- 2019-08-02 TUN-2125: Add PostgresType() to Scope
+- 2019-08-05 TUN-2147: Implemented ScopeUnmarshaler
+- 2019-07-31 TUN-2110: Implement custom deserialization logic for OriginConfig
+- 2019-07-31 AUTH-1972: Deletes token lock file if backoff retry attempts exceeded and intercepts signals until lock is released
+
+2019.7.0
+- 2019-05-28 TUN-1913: Define OriginService for each type of origin
+- 2019-04-29 Build a docker container
+- 2019-06-12 TUN-1952: Group ClientConfig fields by the component that uses the config, and return the part of the config that failed to be applied
+- 2019-06-05 TUN-1893: Proxy requests to the origin based on tunnel hostname
+- 2019-06-17 TUN-1961: Create EdgeConnectionManager to maintain outbound connections to the edge
+- 2019-06-18 TUN-1885: Reconfigure cloudflared on receiving new ClientConfig
+- 2019-06-19 TUN-1976: Pass tunnel hostname through header
+- 2019-06-20 TUN-1982: Load custom origin CA when OriginCAPool is specified
+- 2019-06-26 TUN-2005: Upgrade logrus
+- 2019-06-20 TUN-1981: Write response header & body on proxy error to notify eyeballs of failure category
+- 2019-06-20 TUN-1977: Validate OriginConfig has valid URL, and use scheme to determine if a HTTPOriginService is expecting HTTP or Unix
+- 2019-06-13 DoH: change the media type to application/dns-message
+- 2019-06-26 AUTH-1736: Better handling of token revocation
+
+2019.6.0
+- 2019-05-17 TUN-1828: Update declarative tunnel config struct
+- 2019-05-29 Handle exit code on err
+- 2019-05-29 AUTH-1802: Fixed ssh-config templating
+- 2019-05-30 TUN-1914: Conflate HTTP and Unix OriginConfig, and add TLS config to WebSocketOriginConfig
+- 2019-06-03 AUTH-1811: ssh-gen config fixes
+
+2019.5.0
+- 2019-04-25 TUN-1781: ServeStream should return early on error
+- 2019-04-30 TUN-1786: Remove low-level Windows service logging
+- 2019-05-03 TUN-1807: Send cloudflared version in Connect RPC
+- 2019-01-23 AUTH-1557: Short Lived Certs
+- 2019-05-13 TUN-1847: Log a distinct message when OpenStream fails while waiting for response headers
+- 2019-05-13 AUTH-1706: fixes and testing
+- 2019-05-22 TUN-1880: Save debug and warn level log to logfile
+- 2019-05-22 AUTH-1781: fixed race condition for short lived certs, doc required config
+
+2019.4.1
+- 2019-03-18 TUN-1626: Create new supervisor to establish connection with origintunneld
+- 2019-04-04 TUN-1619: Add flag to test declarative tunnels.
+- 2019-04-05 TUN-1577: decompose carrier.StartServer to make TestStartServer less flappy
+- 2019-03-29 TUN-1606: Define CloudflaredConfig RPC structure, interface for cloudflared's RPC server
+- 2019-04-02 TUN-1682: Add context to OpenStream to prevent it from blocking indefinitely.
+- 2019-04-16 TUN-1732: cloudflared metrics should track userHostnames
+- 2019-04-17 TUN-1734: Pin packages at exact versions
+- 2019-04-18 TUN-1669: Update license message in help text. Also fix test
+
+2019.4.0
+- 2019-03-28 TUN-1648: ConnectionID is now a UUID
+- 2019-04-01 TUN-1673: Conflate Hello and Connect RPCs
+
+2019.3.2
+- 2019-03-22 TUN-1637: Free tunnels shouldn't require cert.pem
+- 2019-03-18 TUN-1604: Define Connect RPC call
+
+2019.3.1
+- 2019-03-09 Add rdp as a supported protocol in URL validation (#76)
+- 2019-03-15 TUN-1613: improved cloudflared RegisterTunnel fail metrics
+- 2019-03-17 TUN-1615: revert miekg/dns to last known working revision
+
+2019.3.0
+- 2018-12-28 make http transport aware of proxy from envvar
+- 2019-02-28 TUN-1559: fix nil dereference in TunnelConfig.CloseConnOnce
+- 2019-03-04 TUN-1451: Make non-interactive, non-service execution possible on Windows
+- 2019-03-04 TUN-1562: Refactor connectedSignal to be safe to close multiple times
+- 2019-02-27 TUN-1550: Add validation timeout for non-responsive origins
+- 2019-03-06 AUTH-1531: Named flags for ssh service tokens
+- 2019-02-14 Support unix sockets.
+- 2019-03-08 TUN-1389: Non-scalar flags in a cloudflared config.yml don't get logged
+- 2019-03-07 TUN-1522: If we can't get SRV from default resolver, get them from 1.1.1.1 DoT
+
+2019.2.1
+- 2019-02-14 TUN-1381:  should tell you if you're on the latest version rather than just exiting silently
+- 2019-02-15 TUN-1467: build with Go 1.11
+- 2019-02-15 AUTH-1519: Added logging
+- 2019-02-19 TUN-1525: cloudflared metrics for registration success/fail
+- 2019-02-19 TUN-1510: Wrap the close() in sync.Once.Do
+
+2019.2.0
+- 2019-01-24 AUTH-1462: better curl arg parsing
+- 2019-02-01 TUN-1456: Only make one UUID
+- 2019-01-30 cloudflared/linux_service: Add missing /etc/init.d shebang
+- 2019-02-07 AUTH-1511: Add custom headers for ssh command
+- 2019-02-01 AUTH-1503: Added RDP support
+- 2019-02-01 AUTH-1403: Print the paths in the ssh-config instructions
+
+2019.1.0
+- 2018-12-10 TUN-1231: Horizontal overflow wrapping on the Hello page
+- 2018-12-17 TUN-1140: Show usage if invoked with no args or config
+- 2018-11-06 TUN-632 Filter out common network exceptions from going to Sentry on StartServer
+- 2019-01-07 TUN-1138: Install cloudflared service directory with 755 permissions
+- 2019-01-07 TUN-1265: Silent exit when failing to parse config
+- 2019-01-10 TUN-1350: Enhance error messages with cloudflarestatus.com link, if relevant
+- 2019-01-16 TUN-1358: Close readyList after Muxer.Serve() has stopped running
+- 2019-01-24 AUTH-1423: move from stdout to stderr
+- 2019-01-24 AUTH-1404: reauth if the token is about to expire within 15 minutes
+- 2019-01-24 AUTH-1459: improved ssh streaming error message
+- 2019-01-24 AUTH-1211: print all the versions
+- 2019-01-24 AUTH-1337: fix url path
+- 2019-01-28 TUN-1418: Rename ProtocolLogger to TransportLogger, and use TransportLogger to log RPC events.
+- 2019-01-28 TUN-1419: Identify request/response headers/content length with ray ID
+
+2018.12.1
+- 2018-12-11 TUN-1270: cloudflared panic (HA metrics missing label)
+
+2018.12.0
+- 2018-11-15 TUN-1196: Allow TLS config client CA and root CA to be constructed from multiple certificates
+- 2018-11-20 TUN-1209: TLS Config Certificates and GetCertificate can both be set
+- 2018-11-26 TUN-1212: Expose tunnel_id in metrics
+- 2018-11-30 TUN-1204: remove 'cloudflared hello' command
+- 2018-12-04 Fix license URL typo
+- 2018-12-07 TUN-1250: ValidateHTTPService shouldn't follow 302s
+
+2018.11.0
+- 2018-10-31 AUTH-1282: Fixed an issue where we were receiving as opposed sending on the channel.
+- 2018-11-06 TUN-1179: Fix log message in cmd/cloudflared/transfer.Run
+- 2018-11-13 AUTH-1308: get jwt even when you are already logged in
+- 2018-11-12 TUN-1190: check URL parse error when starting SSH proxy server
+- 2018-11-15 AUTH-1320: Fixed request issue and unhide the ssh command
+
+2018.10.5
+- 2018-10-18 TUN-968: Flow control for large requests/responses
+- 2018-10-26 TUN-1158: Windows: use process arguments rather than trivial service arguments
+- 2018-10-20 #30: Fix the Content-Length header for HTTP2->HTTP1
+- 2018-10-29 TUN-1160: pass Host header during origin url validation
+
+2018.10.4
+- 2018-09-21 AUTH-1070: added SSH/protocol forwarding
+- 2018-10-19 AUTH-1235: fixed packaging of deb dev file
+- 2018-10-19 TUN-1097: Host missing from WebSocket request
+- 2018-10-19 AUTH-1188: UX Review and Changes for CLI SSH Access
+
+2018.10.3
+- 2018-10-08 TUN-1099: Bring back changes in 2018.10.1
+- 2018-10-08 TUN-1098: removed deprecation error
+- 2018-10-08 TUN-1101: False negatives in Cloudflared error reporting
+
+2018.10.2
+- 2018-10-06 TUN-1093: Revert cloudflared to 2018.8.0
+
+2018.10.1
+- 2018-10-03 TUN-1012: Normalize config filename for Linux services
+- 2018-10-05 TUN-1081: cloudflared now generates UUIDs
+- 2018-10-05 TUN-1083: fixed incorrect help menu
+- 2018-10-05 TUN-1086: fixed config option
+
+2018.10.0
 - 2018-08-15 AUTH-910, AUTH-1049, AUTH-1068, AUTH-1056: Generate and store Access tokens with E2EE option, curl/cmd wrapper
 - 2018-09-11 TUN-890: To support free tunnels, hostname can now be ""
 - 2018-09-12 TUN-810: Cloudflared should open dash/argotunnel not dash/warp
@@ -17,6 +173,13 @@
 - 2018-09-18 AUTH-1136: addressing beta feedback
 - 2018-09-26 AUTH-1165: hide access command
 - 2018-09-26 TUN-1046: Document that delta compression is a beta feature
+- 2018-09-28 TUN-1056: Lint error broke build
+- 2018-09-27 TUN-1052: Origintunneld can send back an Origincert to Cloudflared
+- 2018-09-28 TUN-1052: Changing type of OriginCert to :Data
+- 2018-10-01 TUN-1062: Makefile target for regenerating Capn Proto definitions
+- 2018-10-02 TUN-1064: Revert OriginCert capnp changes in Cloudflared. Reverts commits a1ee2342e97 and 8c756c45785.
+- 2018-10-03 TUN-1076: Pin capnproto2 to version 2.17.1
+- 2018-10-03 AUTH-1199: unhide access command, added beta label
 
 2018.8.0
 - 2018-05-01 Initial commit

carrier/carrier.go

@@ -0,0 +1,216 @@
+//Package carrier provides a WebSocket proxy to carry or proxy a connection
+//from the local client to the edge. See it as a wrapper around any protocol
+//that it packages up in a WebSocket connection to the edge.
+package carrier
+
+import (
+	"io"
+	"net"
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/token"
+	cloudflaredWebsocket "github.com/cloudflare/cloudflared/websocket"
+	"github.com/gorilla/websocket"
+	"github.com/sirupsen/logrus"
+)
+
+type StartOptions struct {
+	OriginURL string
+	Headers   http.Header
+}
+
+// StdinoutStream is empty struct for wrapping stdin/stdout
+// into a single ReadWriter
+type StdinoutStream struct {
+}
+
+// Read will read from Stdin
+func (c *StdinoutStream) Read(p []byte) (int, error) {
+	return os.Stdin.Read(p)
+
+}
+
+// Write will write to Stdout
+func (c *StdinoutStream) Write(p []byte) (int, error) {
+	return os.Stdout.Write(p)
+}
+
+// Helper to allow defering the response close with a check that the resp is not nil
+func closeRespBody(resp *http.Response) {
+	if resp != nil {
+		resp.Body.Close()
+	}
+}
+
+// StartClient will copy the data from stdin/stdout over a WebSocket connection
+// to the edge (originURL)
+func StartClient(logger *logrus.Logger, stream io.ReadWriter, options *StartOptions) error {
+	return serveStream(logger, stream, options)
+}
+
+// StartServer will setup a listener on a specified address/port and then
+// forward connections to the origin by calling `Serve()`.
+func StartServer(logger *logrus.Logger, address string, shutdownC <-chan struct{}, options *StartOptions) error {
+	listener, err := net.Listen("tcp", address)
+	if err != nil {
+		logger.WithError(err).Error("failed to start forwarding server")
+		return err
+	}
+	logger.Info("Started listening on ", address)
+	return Serve(logger, listener, shutdownC, options)
+}
+
+// Serve accepts incoming connections on the specified net.Listener.
+// Each connection is handled in a new goroutine: its data is copied over a
+// WebSocket connection to the edge (originURL).
+// `Serve` always closes `listener`.
+func Serve(logger *logrus.Logger, listener net.Listener, shutdownC <-chan struct{}, options *StartOptions) error {
+	defer listener.Close()
+	for {
+		select {
+		case <-shutdownC:
+			return nil
+		default:
+			conn, err := listener.Accept()
+			if err != nil {
+				return err
+			}
+			go serveConnection(logger, conn, options)
+		}
+	}
+}
+
+// serveConnection handles connections for the Serve() call
+func serveConnection(logger *logrus.Logger, c net.Conn, options *StartOptions) {
+	defer c.Close()
+	serveStream(logger, c, options)
+}
+
+// serveStream will serve the data over the WebSocket stream
+func serveStream(logger *logrus.Logger, conn io.ReadWriter, options *StartOptions) error {
+	wsConn, err := createWebsocketStream(options)
+	if err != nil {
+		logger.WithError(err).Errorf("failed to connect to %s\n", options.OriginURL)
+		return err
+	}
+	defer wsConn.Close()
+
+	cloudflaredWebsocket.Stream(wsConn, conn)
+
+	return nil
+}
+
+// createWebsocketStream will create a WebSocket connection to stream data over
+// It also handles redirects from Access and will present that flow if
+// the token is not present on the request
+func createWebsocketStream(options *StartOptions) (*cloudflaredWebsocket.Conn, error) {
+	req, err := http.NewRequest(http.MethodGet, options.OriginURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header = options.Headers
+
+	wsConn, resp, err := cloudflaredWebsocket.ClientConnect(req, nil)
+	defer closeRespBody(resp)
+	if err != nil && isAccessResponse(resp) {
+		wsConn, err = createAccessAuthenticatedStream(options)
+		if err != nil {
+			return nil, err
+		}
+	} else if err != nil {
+		return nil, err
+	}
+
+	return &cloudflaredWebsocket.Conn{Conn: wsConn}, nil
+}
+
+// isAccessResponse checks the http Response to see if the url location
+// contains the Access structure.
+func isAccessResponse(resp *http.Response) bool {
+	if resp == nil || resp.StatusCode <= 300 {
+		return false
+	}
+
+	location, err := resp.Location()
+	if err != nil || location == nil {
+		return false
+	}
+	if strings.HasPrefix(location.Path, "/cdn-cgi/access/login") {
+		return true
+	}
+
+	return false
+}
+
+// createAccessAuthenticatedStream will try load a token from storage and make
+// a connection with the token set on the request. If it still get redirect,
+// this probably means the token in storage is invalid (expired/revoked). If that
+// happens it deletes the token and runs the connection again, so the user can
+// login again and generate a new one.
+func createAccessAuthenticatedStream(options *StartOptions) (*websocket.Conn, error) {
+	wsConn, resp, err := createAccessWebSocketStream(options)
+	defer closeRespBody(resp)
+	if err == nil {
+		return wsConn, nil
+	}
+
+	if !isAccessResponse(resp) {
+		return nil, err
+	}
+
+	// Access Token is invalid for some reason. Go through regen flow
+	originReq, err := http.NewRequest(http.MethodGet, options.OriginURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	if err := token.RemoveTokenIfExists(originReq.URL); err != nil {
+		return nil, err
+	}
+	wsConn, resp, err = createAccessWebSocketStream(options)
+	defer closeRespBody(resp)
+	if err != nil {
+		return nil, err
+	}
+
+	return wsConn, nil
+}
+
+// createAccessWebSocketStream builds an Access request and makes a connection
+func createAccessWebSocketStream(options *StartOptions) (*websocket.Conn, *http.Response, error) {
+	req, err := buildAccessRequest(options)
+	if err != nil {
+		return nil, nil, err
+	}
+	return cloudflaredWebsocket.ClientConnect(req, nil)
+}
+
+// buildAccessRequest builds an HTTP request with the Access token set
+func buildAccessRequest(options *StartOptions) (*http.Request, error) {
+	req, err := http.NewRequest(http.MethodGet, options.OriginURL, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	token, err := token.FetchToken(req.URL)
+	if err != nil {
+		return nil, err
+	}
+
+	// We need to create a new request as FetchToken will modify req (boo mutable)
+	// as it has to follow redirect on the API and such, so here we init a new one
+	originRequest, err := http.NewRequest(http.MethodGet, options.OriginURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	originRequest.Header.Set("cf-access-token", token)
+
+	for k, v := range options.Headers {
+		if len(v) >= 1 {
+			originRequest.Header.Set(k, v[0])
+		}
+	}
+
+	return originRequest, nil
+}

carrier/carrier_test.go

@@ -0,0 +1,155 @@
+package carrier
+
+import (
+	"bytes"
+	"io"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"sync"
+	"testing"
+
+	ws "github.com/gorilla/websocket"
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	// example in Sec-Websocket-Key in rfc6455
+	testSecWebsocketKey = "dGhlIHNhbXBsZSBub25jZQ=="
+)
+
+type testStreamer struct {
+	buf *bytes.Buffer
+	l   sync.RWMutex
+}
+
+func newTestStream() *testStreamer {
+	return &testStreamer{buf: new(bytes.Buffer)}
+}
+
+func (s *testStreamer) Read(p []byte) (int, error) {
+	s.l.RLock()
+	defer s.l.RUnlock()
+	return s.buf.Read(p)
+
+}
+
+func (s *testStreamer) Write(p []byte) (int, error) {
+	s.l.Lock()
+	defer s.l.Unlock()
+	return s.buf.Write(p)
+}
+
+func TestStartClient(t *testing.T) {
+	message := "Good morning Austin! Time for another sunny day in the great state of Texas."
+	logger := logrus.New()
+	ts := newTestWebSocketServer()
+	defer ts.Close()
+
+	buf := newTestStream()
+	options := &StartOptions{
+		OriginURL: "http://" + ts.Listener.Addr().String(),
+		Headers:   nil,
+	}
+	err := StartClient(logger, buf, options)
+	assert.NoError(t, err)
+	buf.Write([]byte(message))
+
+	readBuffer := make([]byte, len(message))
+	buf.Read(readBuffer)
+	assert.Equal(t, message, string(readBuffer))
+}
+
+func TestStartServer(t *testing.T) {
+	listener, err := net.Listen("tcp", "localhost:")
+	if err != nil {
+		t.Fatalf("Error starting listener: %v", err)
+	}
+	message := "Good morning Austin! Time for another sunny day in the great state of Texas."
+	logger := logrus.New()
+	shutdownC := make(chan struct{})
+	ts := newTestWebSocketServer()
+	defer ts.Close()
+	options := &StartOptions{
+		OriginURL: "http://" + ts.Listener.Addr().String(),
+		Headers:   nil,
+	}
+
+	go func() {
+		err := Serve(logger, listener, shutdownC, options)
+		if err != nil {
+			t.Fatalf("Error running server: %v", err)
+		}
+	}()
+
+	conn, err := net.Dial("tcp", listener.Addr().String())
+	conn.Write([]byte(message))
+
+	readBuffer := make([]byte, len(message))
+	conn.Read(readBuffer)
+	assert.Equal(t, string(readBuffer), message)
+}
+
+func TestIsAccessResponse(t *testing.T) {
+	validLocationHeader := http.Header{}
+	validLocationHeader.Add("location", "https://test.cloudflareaccess.com/cdn-cgi/access/login/blahblah")
+	invalidLocationHeader := http.Header{}
+	invalidLocationHeader.Add("location", "https://google.com")
+	testCases := []struct {
+		Description string
+		In          *http.Response
+		ExpectedOut bool
+	}{
+		{"nil response", nil, false},
+		{"redirect with no location", &http.Response{StatusCode: http.StatusPermanentRedirect}, false},
+		{"200 ok", &http.Response{StatusCode: http.StatusOK}, false},
+		{"redirect with location", &http.Response{StatusCode: http.StatusPermanentRedirect, Header: validLocationHeader}, true},
+		{"redirect with invalid location", &http.Response{StatusCode: http.StatusPermanentRedirect, Header: invalidLocationHeader}, false},
+	}
+
+	for i, tc := range testCases {
+		if isAccessResponse(tc.In) != tc.ExpectedOut {
+			t.Fatalf("Failed case %d -- %s", i, tc.Description)
+		}
+	}
+
+}
+
+func newTestWebSocketServer() *httptest.Server {
+	upgrader := ws.Upgrader{
+		ReadBufferSize:  1024,
+		WriteBufferSize: 1024,
+	}
+
+	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		conn, _ := upgrader.Upgrade(w, r, nil)
+		defer conn.Close()
+		for {
+			mt, message, err := conn.ReadMessage()
+			if err != nil {
+				break
+			}
+
+			if err := conn.WriteMessage(mt, []byte(message)); err != nil {
+				break
+			}
+		}
+	}))
+}
+
+func testRequest(t *testing.T, url string, stream io.ReadWriter) *http.Request {
+	req, err := http.NewRequest("GET", url, stream)
+	if err != nil {
+		t.Fatalf("testRequestHeader error")
+	}
+
+	req.Header.Add("Connection", "Upgrade")
+	req.Header.Add("Upgrade", "WebSocket")
+	req.Header.Add("Sec-Websocket-Key", testSecWebsocketKey)
+	req.Header.Add("Sec-Websocket-Protocol", "tunnel-protocol")
+	req.Header.Add("Sec-Websocket-Version", "13")
+	req.Header.Add("User-Agent", "curl/7.59.0")
+
+	return req
+}

cfsetup.yaml

@@ -1,6 +1,7 @@
-pinned_go: &pinned_go go=1.9.3-1
+pinned_go: &pinned_go go=1.12.7-1
 build_dir: &build_dir /cfsetup_build/src/github.com/cloudflare/cloudflared/
-stretch:
+default-flavor: stretch
+stretch: &stretch
   build:
     build_dir: *build_dir
     builddeps:
@@ -46,15 +47,15 @@ stretch:
       - export CC=arm-linux-gnueabihf-gcc
       - make release
   release-linux-386:
-      build_dir: *build_dir
-      builddeps:
-        - *pinned_go
-        - gcc-multilib
-      post-cache:
-        - export GOPATH=/cfsetup_build/
-        - export GOOS=linux
-        - export GOARCH=386
-        - make release
+    build_dir: *build_dir
+    builddeps:
+      - *pinned_go
+      - gcc-multilib
+    post-cache:
+      - export GOPATH=/cfsetup_build/
+      - export GOOS=linux
+      - export GOARCH=386
+      - make release
   release-windows-amd64:
     build_dir: *build_dir
     builddeps:
@@ -86,4 +87,20 @@ stretch:
       - export GOPATH=/cfsetup_build/
       - export GOOS=linux
       - export GOARCH=amd64
+      - sudo chown -R $(whoami) /cfsetup_build/
+      - go get github.com/BurntSushi/go-sumtype
+      - export PATH="$GOPATH/bin:$PATH"
       - make test
+
+jessie: *stretch
+
+# cfsetup compose
+default-stack: test_dbconnect
+test_dbconnect:
+  compose:
+    up-args:
+      - --renew-anon-volumes
+      - --abort-on-container-exit
+      - --exit-code-from=cloudflared
+    files:
+      - dbconnect/integration_test/dbconnect.yaml

cmd/cloudflared/access/carrier.go

@@ -0,0 +1,68 @@
+package access
+
+import (
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/cloudflare/cloudflared/carrier"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/validation"
+	"github.com/pkg/errors"
+	cli "gopkg.in/urfave/cli.v2"
+)
+
+// ssh will start a WS proxy server for server mode
+// or copy from stdin/stdout for client mode
+// useful for proxying other protocols (like ssh) over websockets
+// (which you can put Access in front of)
+func ssh(c *cli.Context) error {
+	// get the hostname from the cmdline and error out if its not provided
+	rawHostName := c.String(sshHostnameFlag)
+	hostname, err := validation.ValidateHostname(rawHostName)
+	if err != nil || rawHostName == "" {
+		return cli.ShowCommandHelp(c, "ssh")
+	}
+	originURL := "https://" + hostname
+
+	// get the headers from the cmdline and add them
+	headers := buildRequestHeaders(c.StringSlice(sshHeaderFlag))
+	if c.IsSet(sshTokenIDFlag) {
+		headers.Add("CF-Access-Client-Id", c.String(sshTokenIDFlag))
+	}
+	if c.IsSet(sshTokenSecretFlag) {
+		headers.Add("CF-Access-Client-Secret", c.String(sshTokenSecretFlag))
+	}
+
+	options := &carrier.StartOptions{
+		OriginURL: originURL,
+		Headers:   headers,
+	}
+
+	if c.NArg() > 0 || c.IsSet(sshURLFlag) {
+		localForwarder, err := config.ValidateUrl(c)
+		if err != nil {
+			logger.WithError(err).Error("Error validating origin URL")
+			return errors.Wrap(err, "error validating origin URL")
+		}
+		forwarder, err := url.Parse(localForwarder)
+		if err != nil {
+			logger.WithError(err).Error("Error validating origin URL")
+			return errors.Wrap(err, "error validating origin URL")
+		}
+		return carrier.StartServer(logger, forwarder.Host, shutdownC, options)
+	}
+
+	return carrier.StartClient(logger, &carrier.StdinoutStream{}, options)
+}
+
+func buildRequestHeaders(values []string) http.Header {
+	headers := make(http.Header)
+	for _, valuePair := range values {
+		split := strings.Split(valuePair, ":")
+		if len(split) > 1 {
+			headers.Add(strings.TrimSpace(split[0]), strings.TrimSpace(split[1]))
+		}
+	}
+	return headers
+}

cmd/cloudflared/access/carrier_test.go

@@ -0,0 +1,18 @@
+package access
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBuildRequestHeaders(t *testing.T) {
+	headers := make(http.Header)
+	headers.Add("client", "value")
+	headers.Add("secret", "safe-value")
+
+	values := buildRequestHeaders([]string{"client: value", "secret: safe-value", "trash"})
+	assert.Equal(t, headers.Get("client"), values.Get("client"))
+	assert.Equal(t, headers.Get("secret"), values.Get("secret"))
+}

cmd/cloudflared/access/cmd.go

@@ -5,8 +5,13 @@ import (
 	"fmt"
 	"net/url"
 	"os"
+	"strings"
+	"text/template"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/shell"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/token"
+	"github.com/cloudflare/cloudflared/sshgen"
+	"github.com/cloudflare/cloudflared/validation"
 	"golang.org/x/net/idna"
 
 	"github.com/cloudflare/cloudflared/log"
@@ -14,8 +19,44 @@ import (
 	cli "gopkg.in/urfave/cli.v2"
 )
 
+const (
+	sshHostnameFlag    = "hostname"
+	sshURLFlag         = "url"
+	sshHeaderFlag      = "header"
+	sshTokenIDFlag     = "service-token-id"
+	sshTokenSecretFlag = "service-token-secret"
+	sshGenCertFlag     = "short-lived-cert"
+	sshConfigTemplate  = `
+Add to your {{.Home}}/.ssh/config:
+
+Host {{.Hostname}}
+{{- if .ShortLivedCerts}}
+  ProxyCommand bash -c '{{.Cloudflared}} access ssh-gen --hostname %h; ssh -tt %r@cfpipe-{{.Hostname}} >&2 <&1' 
+
+Host cfpipe-{{.Hostname}}
+  HostName {{.Hostname}}
+  ProxyCommand {{.Cloudflared}} access ssh --hostname %h
+  IdentityFile ~/.cloudflared/{{.Hostname}}-cf_key
+  CertificateFile ~/.cloudflared/{{.Hostname}}-cf_key-cert.pub
+{{- else}}
+  ProxyCommand {{.Cloudflared}} access ssh --hostname %h
+{{end}}
+`
+)
+
 const sentryDSN = "https://56a9c9fa5c364ab28f34b14f35ea0f1b@sentry.io/189878"
 
+var (
+	logger         = log.CreateLogger()
+	shutdownC      chan struct{}
+	graceShutdownC chan struct{}
+)
+
+// Init will initialize and store vars from the main program
+func Init(s, g chan struct{}) {
+	shutdownC, graceShutdownC = s, g
+}
+
 // Flags return the global flags for Access related commands (hopefully none)
 func Flags() []cli.Flag {
 	return []cli.Flag{} // no flags yet.
@@ -26,13 +67,13 @@ func Commands() []*cli.Command {
 	return []*cli.Command{
 		{
 			Name:     "access",
-			Category: "Access",
+			Category: "Access (BETA)",
 			Usage:    "access <subcommand>",
-			Description: `Cloudflare Access protects internal resources by securing, authenticating and monitoring access 
+			Description: `(BETA) Cloudflare Access protects internal resources by securing, authenticating and monitoring access 
 			per-user and by application. With Cloudflare Access, only authenticated users with the required permissions are 
 			able to reach sensitive resources. The commands provided here allow you to interact with Access protected 
-			applications from the command line.`,
-			Hidden: true, // This is hidden until we official launch access cli auth
+			applications from the command line. This feature is considered beta. Your feedback is greatly appreciated!
+			https://cfl.re/CLIAuthBeta`,
 			Subcommands: []*cli.Command{
 				{
 					Name:   "login",
@@ -53,7 +94,7 @@ func Commands() []*cli.Command {
 				{
 					Name:   "curl",
 					Action: curl,
-					Usage:  "curl <args>",
+					Usage:  "curl [--allow-request, -ar] <url> [<curl args>...]",
 					Description: `The curl subcommand wraps curl and automatically injects the JWT into a cf-access-token
 					header when using curl to reach an application behind Access.`,
 					ArgsUsage:       "allow-request will allow the curl request to continue even if the jwt is not present.",
@@ -61,7 +102,7 @@ func Commands() []*cli.Command {
 				},
 				{
 					Name:        "token",
-					Action:      token,
+					Action:      generateToken,
 					Usage:       "token -app=<url of access application>",
 					ArgsUsage:   "url of Access application",
 					Description: `The token subcommand produces a JWT which can be used to authenticate requests.`,
@@ -71,6 +112,67 @@ func Commands() []*cli.Command {
 						},
 					},
 				},
+				{
+					Name:        "ssh",
+					Action:      ssh,
+					Aliases:     []string{"rdp"},
+					Usage:       "",
+					ArgsUsage:   "",
+					Description: `The ssh subcommand sends data over a proxy to the Cloudflare edge.`,
+					Flags: []cli.Flag{
+						&cli.StringFlag{
+							Name:  sshHostnameFlag,
+							Usage: "specify the hostname of your application.",
+						},
+						&cli.StringFlag{
+							Name:  sshURLFlag,
+							Usage: "specify the host:port to forward data to Cloudflare edge.",
+						},
+						&cli.StringSliceFlag{
+							Name:    sshHeaderFlag,
+							Aliases: []string{"H"},
+							Usage:   "specify additional headers you wish to send.",
+						},
+						&cli.StringSliceFlag{
+							Name:    sshTokenIDFlag,
+							Aliases: []string{"id"},
+							Usage:   "specify an Access service token ID you wish to use.",
+						},
+						&cli.StringSliceFlag{
+							Name:    sshTokenSecretFlag,
+							Aliases: []string{"secret"},
+							Usage:   "specify an Access service token secret you wish to use.",
+						},
+					},
+				},
+				{
+					Name:        "ssh-config",
+					Action:      sshConfig,
+					Usage:       "",
+					Description: `Prints an example configuration ~/.ssh/config`,
+					Flags: []cli.Flag{
+						&cli.StringFlag{
+							Name:  sshHostnameFlag,
+							Usage: "specify the hostname of your application.",
+						},
+						&cli.BoolFlag{
+							Name:  sshGenCertFlag,
+							Usage: "specify if you wish to generate short lived certs.",
+						},
+					},
+				},
+				{
+					Name:        "ssh-gen",
+					Action:      sshGen,
+					Usage:       "",
+					Description: `Generates a short lived certificate for given hostname`,
+					Flags: []cli.Flag{
+						&cli.StringFlag{
+							Name:  sshHostnameFlag,
+							Usage: "specify the hostname of your application.",
+						},
+					},
+				},
 			},
 		},
 	}
@@ -86,10 +188,12 @@ func login(c *cli.Context) error {
 		logger.Errorf("Please provide the url of the Access application\n")
 		return err
 	}
-	if _, err := fetchToken(c, appURL); err != nil {
+	token, err := token.FetchToken(appURL)
+	if err != nil {
 		logger.Errorf("Failed to fetch token: %s\n", err)
 		return err
 	}
+	fmt.Fprintf(os.Stdout, "Successfully fetched your token:\n\n%s\n\n", string(token))
 
 	return nil
 }
@@ -104,18 +208,19 @@ func curl(c *cli.Context) error {
 		return errors.New("incorrect args")
 	}
 
-	cmdArgs, appURL, allowRequest, err := buildCurlCmdArgs(args.Slice())
+	cmdArgs, allowRequest := parseAllowRequest(args.Slice())
+	appURL, err := getAppURL(cmdArgs)
 	if err != nil {
 		return err
 	}
 
-	token, err := getTokenIfExists(appURL)
-	if err != nil || token == "" {
+	tok, err := token.GetTokenIfExists(appURL)
+	if err != nil || tok == "" {
 		if allowRequest {
 			logger.Warn("You don't have an Access token set. Please run access token <access application> to fetch one.")
 			return shell.Run("curl", cmdArgs...)
 		}
-		token, err = fetchToken(c, appURL)
+		tok, err = token.FetchToken(appURL)
 		if err != nil {
 			logger.Error("Failed to refresh token: ", err)
 			return err
@@ -123,37 +228,118 @@ func curl(c *cli.Context) error {
 	}
 
 	cmdArgs = append(cmdArgs, "-H")
-	cmdArgs = append(cmdArgs, fmt.Sprintf("cf-access-token: %s", token))
+	cmdArgs = append(cmdArgs, fmt.Sprintf("cf-access-token: %s", tok))
 	return shell.Run("curl", cmdArgs...)
 }
 
 // token dumps provided token to stdout
-func token(c *cli.Context) error {
+func generateToken(c *cli.Context) error {
 	raven.SetDSN(sentryDSN)
 	appURL, err := url.Parse(c.String("app"))
 	if err != nil || c.NumFlags() < 1 {
 		fmt.Fprintln(os.Stderr, "Please provide a url.")
 		return err
 	}
-	token, err := getTokenIfExists(appURL)
-	if err != nil || token == "" {
+	tok, err := token.GetTokenIfExists(appURL)
+	if err != nil || tok == "" {
 		fmt.Fprintln(os.Stderr, "Unable to find token for provided application. Please run token command to generate token.")
 		return err
 	}
 
-	if _, err := fmt.Fprint(os.Stdout, token); err != nil {
+	if _, err := fmt.Fprint(os.Stdout, tok); err != nil {
 		fmt.Fprintln(os.Stderr, "Failed to write token to stdout.")
 		return err
 	}
 	return nil
 }
 
+// sshConfig prints an example SSH config to stdout
+func sshConfig(c *cli.Context) error {
+	genCertBool := c.Bool(sshGenCertFlag)
+	hostname := c.String(sshHostnameFlag)
+	if hostname == "" {
+		hostname = "[your hostname]"
+	}
+
+	type config struct {
+		Home            string
+		ShortLivedCerts bool
+		Hostname        string
+		Cloudflared     string
+	}
+
+	t := template.Must(template.New("sshConfig").Parse(sshConfigTemplate))
+	return t.Execute(os.Stdout, config{Home: os.Getenv("HOME"), ShortLivedCerts: genCertBool, Hostname: hostname, Cloudflared: cloudflaredPath()})
+}
+
+// sshGen generates a short lived certificate for provided hostname
+func sshGen(c *cli.Context) error {
+	// get the hostname from the cmdline and error out if its not provided
+	rawHostName := c.String(sshHostnameFlag)
+	hostname, err := validation.ValidateHostname(rawHostName)
+	if err != nil || rawHostName == "" {
+		return cli.ShowCommandHelp(c, "ssh-gen")
+	}
+
+	originURL, err := url.Parse("https://" + hostname)
+	if err != nil {
+		return err
+	}
+
+	// this fetchToken function mutates the appURL param. We should refactor that
+	fetchTokenURL := &url.URL{}
+	*fetchTokenURL = *originURL
+	token, err := token.FetchToken(fetchTokenURL)
+	if err != nil {
+		return err
+	}
+
+	if err := sshgen.GenerateShortLivedCertificate(originURL, token); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// getAppURL will pull the appURL needed for fetching a user's Access token
+func getAppURL(cmdArgs []string) (*url.URL, error) {
+	if len(cmdArgs) < 1 {
+		logger.Error("Please provide a valid URL as the first argument to curl.")
+		return nil, errors.New("not a valid url")
+	}
+
+	u, err := processURL(cmdArgs[0])
+	if err != nil {
+		logger.Error("Please provide a valid URL as the first argument to curl.")
+		return nil, err
+	}
+
+	return u, err
+}
+
+// parseAllowRequest will parse cmdArgs and return a copy of the args and result
+// of the allow request was present
+func parseAllowRequest(cmdArgs []string) ([]string, bool) {
+	if len(cmdArgs) > 1 {
+		if cmdArgs[0] == "--allow-request" || cmdArgs[0] == "-ar" {
+			return cmdArgs[1:], true
+		}
+	}
+
+	return cmdArgs, false
+}
+
 // processURL will preprocess the string (parse to a url, convert to punycode, etc).
 func processURL(s string) (*url.URL, error) {
 	u, err := url.ParseRequestURI(s)
 	if err != nil {
 		return nil, err
 	}
+
+	if u.Host == "" {
+		return nil, errors.New("not a valid host")
+	}
+
 	host, err := idna.ToASCII(u.Hostname())
 	if err != nil { // we fail to convert to punycode, just return the url we parsed.
 		return u, nil
@@ -167,33 +353,22 @@ func processURL(s string) (*url.URL, error) {
 	return u, nil
 }
 
-// buildCurlCmdArgs will build the curl cmd args
-func buildCurlCmdArgs(cmdArgs []string) ([]string, *url.URL, bool, error) {
-	allowRequest, iAllowRequest := false, 0
-	var appURL *url.URL
-	for i, arg := range cmdArgs {
-		if arg == "-allow-request" || arg == "-ar" {
-			iAllowRequest = i
-			allowRequest = true
-		}
-
-		u, err := processURL(arg)
-		if err == nil {
-			appURL = u
-			cmdArgs[i] = appURL.String()
+// cloudflaredPath pulls the full path of cloudflared on disk
+func cloudflaredPath() string {
+	for _, p := range strings.Split(os.Getenv("PATH"), ":") {
+		path := fmt.Sprintf("%s/%s", p, "cloudflared")
+		if isFileThere(path) {
+			return path
 		}
 	}
-
-	if appURL == nil {
-		logger.Error("Please provide a valid URL.")
-		return cmdArgs, appURL, allowRequest, errors.New("invalid url")
-	}
-
-	if allowRequest {
-		// remove from cmdArgs
-		cmdArgs[iAllowRequest] = cmdArgs[len(cmdArgs)-1]
-		cmdArgs = cmdArgs[:len(cmdArgs)-1]
-	}
-
-	return cmdArgs, appURL, allowRequest, nil
+	return "cloudflared"
+}
+
+// isFileThere will check for the presence of candidate path
+func isFileThere(candidate string) bool {
+	fi, err := os.Stat(candidate)
+	if err != nil || fi.IsDir() || !fi.Mode().IsRegular() {
+		return false
+	}
+	return true
 }

cmd/cloudflared/access/token.go

@@ -1,90 +0,0 @@
-package access
-
-import (
-	"fmt"
-	"io/ioutil"
-	"net/url"
-	"os"
-	"path/filepath"
-	"strings"
-	"time"
-
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/transfer"
-	"github.com/cloudflare/cloudflared/log"
-	"github.com/coreos/go-oidc/jose"
-	"github.com/coreos/go-oidc/oidc"
-	homedir "github.com/mitchellh/go-homedir"
-	cli "gopkg.in/urfave/cli.v2"
-)
-
-var logger = log.CreateLogger()
-
-// fetchToken will either load a stored token or generate a new one
-func fetchToken(c *cli.Context, appURL *url.URL) (string, error) {
-	if token, err := getTokenIfExists(appURL); token != "" && err == nil {
-		fmt.Fprintf(os.Stdout, "You have an existing token:\n\n%s\n\n", token)
-		return token, nil
-	}
-
-	path, err := generateFilePathForTokenURL(appURL)
-	if err != nil {
-		return "", err
-	}
-
-	// this weird parameter is the resource name (token) and the key/value
-	// we want to send to the transfer service. the key is token and the value
-	// is blank (basically just the id generated in the transfer service)
-	const resourceName, key, value = "token", "token", ""
-	token, err := transfer.Run(c, appURL, resourceName, key, value, path, true)
-	if err != nil {
-		return "", err
-	}
-
-	fmt.Fprintf(os.Stdout, "Successfully fetched your token:\n\n%s\n\n", string(token))
-	return string(token), nil
-}
-
-// getTokenIfExists will return the token from local storage if it exists
-func getTokenIfExists(url *url.URL) (string, error) {
-	path, err := generateFilePathForTokenURL(url)
-	if err != nil {
-		return "", err
-	}
-	content, err := ioutil.ReadFile(path)
-	if err != nil {
-		return "", err
-	}
-	token, err := jose.ParseJWT(string(content))
-	if err != nil {
-		return "", err
-	}
-
-	claims, err := token.Claims()
-	if err != nil {
-		return "", err
-	}
-	ident, err := oidc.IdentityFromClaims(claims)
-	if err == nil && ident.ExpiresAt.After(time.Now()) {
-		return token.Encode(), nil
-	}
-	return "", err
-}
-
-// generateFilePathForTokenURL will return a filepath for given access application url
-func generateFilePathForTokenURL(url *url.URL) (string, error) {
-	configPath, err := homedir.Expand(config.DefaultConfigDirs[0])
-	if err != nil {
-		return "", err
-	}
-	ok, err := config.FileExists(configPath)
-	if !ok && err == nil {
-		// create config directory if doesn't already exist
-		err = os.Mkdir(configPath, 0700)
-	}
-	if err != nil {
-		return "", err
-	}
-	name := strings.Replace(fmt.Sprintf("%s%s-token", url.Hostname(), url.EscapedPath()), "/", "-", -1)
-	return filepath.Join(configPath, name), nil
-}

cmd/cloudflared/buildinfo/build_info.go

@@ -0,0 +1,28 @@
+package buildinfo
+
+import (
+	"runtime"
+
+	"github.com/sirupsen/logrus"
+)
+
+type BuildInfo struct {
+	GoOS               string `json:"go_os"`
+	GoVersion          string `json:"go_version"`
+	GoArch             string `json:"go_arch"`
+	CloudflaredVersion string `json:"cloudflared_version"`
+}
+
+func GetBuildInfo(cloudflaredVersion string) *BuildInfo {
+	return &BuildInfo{
+		GoOS:               runtime.GOOS,
+		GoVersion:          runtime.Version(),
+		GoArch:             runtime.GOARCH,
+		CloudflaredVersion: cloudflaredVersion,
+	}
+}
+
+func (bi *BuildInfo) Log(logger *logrus.Logger) {
+	logger.Infof("Version %s", bi.CloudflaredVersion)
+	logger.Infof("GOOS: %s, GOVersion: %s, GoArch: %s", bi.GoOS, bi.GoVersion, bi.GoArch)
+}

cmd/cloudflared/config/configuration.go

@@ -1,22 +1,27 @@
 package config
 
 import (
+	"errors"
 	"os"
 	"path/filepath"
 
+	"github.com/cloudflare/cloudflared/validation"
 	homedir "github.com/mitchellh/go-homedir"
 	"gopkg.in/urfave/cli.v2"
 	"gopkg.in/urfave/cli.v2/altsrc"
 )
 
 var (
-	defaultConfigFiles = []string{"config.yml", "config.yaml"}
+	// File names from which we attempt to read configuration.
+	DefaultConfigFiles = []string{"config.yml", "config.yaml"}
 
 	// Launchd doesn't set root env variables, so there is default
 	// Windows default config dir was ~/cloudflare-warp in documentation; let's keep it compatible
 	DefaultConfigDirs = []string{"~/.cloudflared", "~/.cloudflare-warp", "~/cloudflare-warp", "/usr/local/etc/cloudflared", "/etc/cloudflared"}
 )
 
+const DefaultCredentialFile = "cert.pem"
+
 // FileExists checks to see if a file exist at the provided path.
 func FileExists(path string) (bool, error) {
 	f, err := os.Open(path)
@@ -40,11 +45,11 @@ func FindInputSourceContext(context *cli.Context) (altsrc.InputSourceContext, er
 }
 
 // FindDefaultConfigPath returns the first path that contains a config file.
-// If none of the combination of defaultConfigDirs (differs by OS for legacy reasons)
-// and defaultConfigFiles contains a config file, return empty string.
+// If none of the combination of DefaultConfigDirs and DefaultConfigFiles
+// contains a config file, return empty string.
 func FindDefaultConfigPath() string {
 	for _, configDir := range DefaultConfigDirs {
-		for _, configFile := range defaultConfigFiles {
+		for _, configFile := range DefaultConfigFiles {
 			dirPath, err := homedir.Expand(configDir)
 			if err != nil {
 				continue
@@ -57,3 +62,26 @@ func FindDefaultConfigPath() string {
 	}
 	return ""
 }
+
+// ValidateUnixSocket ensures --unix-socket param is used exclusively
+// i.e. it fails if a user specifies both --url and --unix-socket
+func ValidateUnixSocket(c *cli.Context) (string, error) {
+	if c.IsSet("unix-socket") && (c.IsSet("url") || c.NArg() > 0) {
+		return "", errors.New("--unix-socket must be used exclusivly.")
+	}
+	return c.String("unix-socket"), nil
+}
+
+// ValidateUrl will validate url flag correctness. It can be either from --url or argument
+// Notice ValidateUnixSocket, it will enforce --unix-socket is not used with --url or argument
+func ValidateUrl(c *cli.Context) (string, error) {
+	var url = c.String("url")
+	if c.NArg() > 0 {
+		if c.IsSet("url") {
+			return "", errors.New("Specified origin urls using both --url and argument. Decide which one you want, I can only support one.")
+		}
+		url = c.Args().Get(0)
+	}
+	validUrl, err := validation.ValidateUrl(url)
+	return validUrl, err
+}

cmd/cloudflared/linux_service.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
 	cli "gopkg.in/urfave/cli.v2"
 )
 
@@ -30,12 +31,14 @@ func runApp(app *cli.App, shutdownC, graceShutdownC chan struct{}) {
 	app.Run(os.Args)
 }
 
+// The directory and files that are used by the service.
+// These are hard-coded in the templates below.
 const (
 	serviceConfigDir      = "/etc/cloudflared"
-	defaultCredentialFile = "cert.pem"
+	serviceConfigFile     = "config.yml"
+	serviceCredentialFile = "cert.pem"
 )
 
-var defaultConfigFiles = []string{"config.yml", "config.yaml"}
 var systemdTemplates = []ServiceTemplate{
 	{
 		Path: "/etc/systemd/system/cloudflared.service",
@@ -81,7 +84,8 @@ WantedBy=timers.target
 var sysvTemplate = ServiceTemplate{
 	Path:     "/etc/init.d/cloudflared",
 	FileMode: 0755,
-	Content: `# For RedHat and cousins:
+	Content: `#!/bin/sh
+# For RedHat and cousins:
 # chkconfig: 2345 99 01
 # description: Argo Tunnel agent
 # processname: {{.Path}}
@@ -178,6 +182,23 @@ func isSystemd() bool {
 	return false
 }
 
+func copyUserConfiguration(userConfigDir, userConfigFile, userCredentialFile string) error {
+	if err := ensureConfigDirExists(serviceConfigDir); err != nil {
+		return err
+	}
+	srcCredentialPath := filepath.Join(userConfigDir, userCredentialFile)
+	destCredentialPath := filepath.Join(serviceConfigDir, serviceCredentialFile)
+	if err := copyCredential(srcCredentialPath, destCredentialPath); err != nil {
+		return err
+	}
+	srcConfigPath := filepath.Join(userConfigDir, userConfigFile)
+	destConfigPath := filepath.Join(serviceConfigDir, serviceConfigFile)
+	if err := copyConfig(srcConfigPath, destConfigPath); err != nil {
+		return err
+	}
+	return nil
+}
+
 func installLinuxService(c *cli.Context) error {
 	etPath, err := os.Executable()
 	if err != nil {
@@ -185,11 +206,12 @@ func installLinuxService(c *cli.Context) error {
 	}
 	templateArgs := ServiceTemplateArgs{Path: etPath}
 
-	defaultConfigDir := filepath.Dir(c.String("config"))
-	defaultConfigFile := filepath.Base(c.String("config"))
-	if err = copyCredentials(serviceConfigDir, defaultConfigDir, defaultConfigFile, defaultCredentialFile); err != nil {
+	userConfigDir := filepath.Dir(c.String("config"))
+	userConfigFile := filepath.Base(c.String("config"))
+	userCredentialFile := config.DefaultCredentialFile
+	if err = copyUserConfiguration(userConfigDir, userConfigFile, userCredentialFile); err != nil {
 		logger.WithError(err).Infof("Failed to copy user configuration. Before running the service, ensure that %s contains two files, %s and %s",
-			serviceConfigDir, defaultCredentialFile, defaultConfigFiles[0])
+			serviceConfigDir, serviceCredentialFile, serviceConfigFile)
 		return err
 	}
 

cmd/cloudflared/main.go

@@ -2,35 +2,41 @@ package main
 
 import (
 	"fmt"
-	"os"
+	"strings"
 	"time"
 
-	"golang.org/x/crypto/ssh/terminal"
-
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/access"
-	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/tunnel"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
 	"github.com/cloudflare/cloudflared/log"
 	"github.com/cloudflare/cloudflared/metrics"
 
-	"github.com/getsentry/raven-go"
-	"github.com/mitchellh/go-homedir"
-	"gopkg.in/urfave/cli.v2"
-	"gopkg.in/urfave/cli.v2/altsrc"
+	raven "github.com/getsentry/raven-go"
+	homedir "github.com/mitchellh/go-homedir"
+	cli "gopkg.in/urfave/cli.v2"
 
 	"github.com/pkg/errors"
 )
 
 const (
-	developerPortal = "https://developers.cloudflare.com/argo-tunnel"
-	licenseUrl      = developerPortal + "/licence/"
+	versionText = "Print the version"
 )
 
 var (
 	Version   = "DEV"
 	BuildTime = "unknown"
 	logger    = log.CreateLogger()
+	// Mostly network errors that we don't want reported back to Sentry, this is done by substring match.
+	ignoredErrors = []string{
+		"connection reset by peer",
+		"An existing connection was forcibly closed by the remote host.",
+		"use of closed connection",
+		"You need to enable Argo Smart Routing",
+		"3001 connection closed",
+		"3002 connection dropped",
+		"rpc exception: dial tcp",
+		"rpc exception: EOF",
+	}
 )
 
 func main() {
@@ -44,24 +50,38 @@ func main() {
 	// Windows service manager closes this channel when it receives stop command.
 	graceShutdownC := make(chan struct{})
 
+	cli.VersionFlag = &cli.BoolFlag{
+		Name:    "version",
+		Aliases: []string{"v", "V"},
+		Usage:   versionText,
+	}
+
 	app := &cli.App{}
 	app.Name = "cloudflared"
-	app.Copyright = fmt.Sprintf(`(c) %d Cloudflare Inc.
-   Use is subject to the license agreement at %s`, time.Now().Year(), licenseUrl)
+	app.Usage = "Cloudflare's command-line tool and agent"
+	app.ArgsUsage = "origin-url"
+	app.Copyright = fmt.Sprintf(
+		`(c) %d Cloudflare Inc.
+   Your installation of cloudflared software constitutes a symbol of your signature indicating that you accept
+   the terms of the Cloudflare License (https://developers.cloudflare.com/argo-tunnel/license/),
+   Terms (https://www.cloudflare.com/terms/) and Privacy Policy (https://www.cloudflare.com/privacypolicy/).`,
+		time.Now().Year(),
+	)
 	app.Version = fmt.Sprintf("%s (built %s)", Version, BuildTime)
-	app.Description = `cloudflared connects your machine or user identity to Cloudflare's global network. 
+	app.Description = `cloudflared connects your machine or user identity to Cloudflare's global network.
 	You can use it to authenticate a session to reach an API behind Access, route web traffic to this machine,
 	and configure access control.`
 	app.Flags = flags()
 	app.Action = action(Version, shutdownC, graceShutdownC)
-	app.Before = before(app.Flags)
-	app.Commands = commands()
+	app.Before = tunnel.Before
+	app.Commands = commands(cli.ShowVersion)
 
 	tunnel.Init(Version, shutdownC, graceShutdownC) // we need this to support the tunnel sub command...
+	access.Init(shutdownC, graceShutdownC)
 	runApp(app, shutdownC, graceShutdownC)
 }
 
-func commands() []*cli.Command {
+func commands(version func(c *cli.Context)) []*cli.Command {
 	cmds := []*cli.Command{
 		{
 			Name:      "update",
@@ -74,6 +94,15 @@ Otherwise, does nothing.
 
 To determine if an update happened in a script, check for error code 64.`,
 		},
+		{
+			Name: "version",
+			Action: func(c *cli.Context) (err error) {
+				version(c)
+				return nil
+			},
+			Usage:       versionText,
+			Description: versionText,
+		},
 	}
 	cmds = append(cmds, tunnel.Commands()...)
 	cmds = append(cmds, access.Commands()...)
@@ -85,39 +114,27 @@ func flags() []cli.Flag {
 	return append(flags, access.Flags()...)
 }
 
+func isEmptyInvocation(c *cli.Context) bool {
+	return c.NArg() == 0 && c.NumFlags() == 0
+}
+
 func action(version string, shutdownC, graceShutdownC chan struct{}) cli.ActionFunc {
 	return func(c *cli.Context) (err error) {
-		if isRunningFromTerminal() {
-			logger.Error("Use of cloudflared without commands is deprecated.")
-			cli.ShowAppHelp(c)
-			return nil
+		if isEmptyInvocation(c) {
+			cli.ShowAppHelpAndExit(c, 1)
 		}
 		tags := make(map[string]string)
 		tags["hostname"] = c.String("hostname")
 		raven.SetTagsContext(tags)
 		raven.CapturePanic(func() { err = tunnel.StartServer(c, version, shutdownC, graceShutdownC) }, nil)
+		exitCode := 0
 		if err != nil {
-			raven.CaptureError(err, nil)
+			handleError(err)
+			exitCode = 1
 		}
-		return err
-	}
-}
-
-func before(flags []cli.Flag) cli.BeforeFunc {
-	return func(context *cli.Context) error {
-		inputSource, err := config.FindInputSourceContext(context)
-		if err != nil {
-			logger.WithError(err).Infof("Cannot load configuration from %s", context.String("config"))
-			return err
-		} else if inputSource != nil {
-			err := altsrc.ApplyInputSourceValues(context, inputSource, flags)
-			if err != nil {
-				logger.WithError(err).Infof("Cannot apply configuration from %s", context.String("config"))
-				return err
-			}
-			logger.Infof("Applied configuration from %s", context.String("config"))
-		}
-		return nil
+		// we already handle error printing, so we pass an empty string so we
+		// don't have to print again.
+		return cli.Exit("", exitCode)
 	}
 }
 
@@ -134,6 +151,13 @@ func userHomeDir() (string, error) {
 	return homeDir, nil
 }
 
-func isRunningFromTerminal() bool {
-	return terminal.IsTerminal(int(os.Stdout.Fd()))
+// In order to keep the amount of noise sent to Sentry low, typical network errors can be filtered out here by a substring match.
+func handleError(err error) {
+	errorMessage := err.Error()
+	for _, ignoredErrorMessage := range ignoredErrors {
+		if strings.Contains(errorMessage, ignoredErrorMessage) {
+			return
+		}
+	}
+	raven.CaptureError(err, nil)
 }

cmd/cloudflared/path/path.go

@@ -0,0 +1,30 @@
+package path
+
+import (
+	"fmt"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/mitchellh/go-homedir"
+)
+
+// GenerateFilePathFromURL will return a filepath for given access application url
+func GenerateFilePathFromURL(url *url.URL, suffix string) (string, error) {
+	configPath, err := homedir.Expand(config.DefaultConfigDirs[0])
+	if err != nil {
+		return "", err
+	}
+	ok, err := config.FileExists(configPath)
+	if !ok && err == nil {
+		// create config directory if doesn't already exist
+		err = os.Mkdir(configPath, 0700)
+	}
+	if err != nil {
+		return "", err
+	}
+	name := strings.Replace(fmt.Sprintf("%s%s-%s", url.Hostname(), url.EscapedPath(), suffix), "/", "-", -1)
+	return filepath.Join(configPath, name), nil
+}

cmd/cloudflared/service_template.go

@@ -8,7 +8,6 @@ import (
 	"io/ioutil"
 	"os"
 	"os/exec"
-	"path/filepath"
 	"text/template"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
@@ -97,7 +96,7 @@ func runCommand(command string, args ...string) error {
 func ensureConfigDirExists(configDir string) error {
 	ok, err := config.FileExists(configDir)
 	if !ok && err == nil {
-		err = os.Mkdir(configDir, 0700)
+		err = os.Mkdir(configDir, 0755)
 	}
 	return err
 }
@@ -120,8 +119,7 @@ func openFile(path string, create bool) (file *os.File, exists bool, err error)
 	return file, false, err
 }
 
-func copyCertificate(srcConfigDir, destConfigDir, credentialFile string) error {
-	destCredentialPath := filepath.Join(destConfigDir, credentialFile)
+func copyCredential(srcCredentialPath, destCredentialPath string) error {
 	destFile, exists, err := openFile(destCredentialPath, true)
 	if err != nil {
 		return err
@@ -131,7 +129,6 @@ func copyCertificate(srcConfigDir, destConfigDir, credentialFile string) error {
 	}
 	defer destFile.Close()
 
-	srcCredentialPath := filepath.Join(srcConfigDir, credentialFile)
 	srcFile, _, err := openFile(srcCredentialPath, false)
 	if err != nil {
 		return err
@@ -147,17 +144,8 @@ func copyCertificate(srcConfigDir, destConfigDir, credentialFile string) error {
 	return nil
 }
 
-func copyCredentials(serviceConfigDir, defaultConfigDir, defaultConfigFile, defaultCredentialFile string) error {
-	if err := ensureConfigDirExists(serviceConfigDir); err != nil {
-		return err
-	}
-
-	if err := copyCertificate(defaultConfigDir, serviceConfigDir, defaultCredentialFile); err != nil {
-		return err
-	}
-
+func copyConfig(srcConfigPath, destConfigPath string) error {
 	// Copy or create config
-	destConfigPath := filepath.Join(serviceConfigDir, defaultConfigFile)
 	destFile, exists, err := openFile(destConfigPath, true)
 	if err != nil {
 		logger.WithError(err).Infof("cannot open %s", destConfigPath)
@@ -168,7 +156,6 @@ func copyCredentials(serviceConfigDir, defaultConfigDir, defaultConfigFile, defa
 	}
 	defer destFile.Close()
 
-	srcConfigPath := filepath.Join(defaultConfigDir, defaultConfigFile)
 	srcFile, _, err := openFile(srcConfigPath, false)
 	if err != nil {
 		fmt.Println("Your service needs a config file that at least specifies the hostname option.")

cmd/cloudflared/token/token.go

@@ -0,0 +1,179 @@
+package token
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"net/url"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/path"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/transfer"
+	"github.com/cloudflare/cloudflared/log"
+	"github.com/cloudflare/cloudflared/origin"
+	"gopkg.in/coreos/go-oidc.v1/jose"
+)
+
+const (
+	keyName = "token"
+)
+
+var logger = log.CreateLogger()
+
+type lock struct {
+	lockFilePath string
+	backoff      *origin.BackoffHandler
+	sigHandler   *signalHandler
+}
+
+type signalHandler struct {
+	sigChannel chan os.Signal
+	signals    []os.Signal
+}
+
+func (s *signalHandler) register(handler func()) {
+	s.sigChannel = make(chan os.Signal, 1)
+	signal.Notify(s.sigChannel, s.signals...)
+	go func(s *signalHandler) {
+		for range s.sigChannel {
+			handler()
+		}
+	}(s)
+}
+
+func (s *signalHandler) deregister() {
+	signal.Stop(s.sigChannel)
+	close(s.sigChannel)
+}
+
+func errDeleteTokenFailed(lockFilePath string) error {
+	return fmt.Errorf("failed to acquire a new Access token. Please try to delete %s", lockFilePath)
+}
+
+// newLock will get a new file lock
+func newLock(path string) *lock {
+	lockPath := path + ".lock"
+	return &lock{
+		lockFilePath: lockPath,
+		backoff:      &origin.BackoffHandler{MaxRetries: 7},
+		sigHandler: &signalHandler{
+			signals: []os.Signal{syscall.SIGINT, syscall.SIGTERM},
+		},
+	}
+}
+
+func (l *lock) Acquire() error {
+	// Intercept SIGINT and SIGTERM to release lock before exiting
+	l.sigHandler.register(func() {
+		l.deleteLockFile()
+		os.Exit(0)
+	})
+
+	// Check for a path.lock file
+	// if the lock file exists; start polling
+	// if not, create the lock file and go through the normal flow.
+	// See AUTH-1736 for the reason why we do all this
+	for isTokenLocked(l.lockFilePath) {
+		if l.backoff.Backoff(context.Background()) {
+			continue
+		}
+
+		if err := l.deleteLockFile(); err != nil {
+			return err
+		}
+	}
+
+	// Create a lock file so other processes won't also try to get the token at
+	// the same time
+	if err := ioutil.WriteFile(l.lockFilePath, []byte{}, 0600); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (l *lock) deleteLockFile() error {
+	if err := os.Remove(l.lockFilePath); err != nil && !os.IsNotExist(err) {
+		return errDeleteTokenFailed(l.lockFilePath)
+	}
+	return nil
+}
+
+func (l *lock) Release() error {
+	defer l.sigHandler.deregister()
+	return l.deleteLockFile()
+}
+
+// isTokenLocked checks to see if there is another process attempting to get the token already
+func isTokenLocked(lockFilePath string) bool {
+	exists, err := config.FileExists(lockFilePath)
+	return exists && err == nil
+}
+
+// FetchToken will either load a stored token or generate a new one
+func FetchToken(appURL *url.URL) (string, error) {
+	if token, err := GetTokenIfExists(appURL); token != "" && err == nil {
+		return token, nil
+	}
+
+	path, err := path.GenerateFilePathFromURL(appURL, keyName)
+	if err != nil {
+		return "", err
+	}
+
+	fileLock := newLock(path)
+
+	err = fileLock.Acquire()
+	if err != nil {
+		return "", err
+	}
+	defer fileLock.Release()
+
+	// check to see if another process has gotten a token while we waited for the lock
+	if token, err := GetTokenIfExists(appURL); token != "" && err == nil {
+		return token, nil
+	}
+
+	// this weird parameter is the resource name (token) and the key/value
+	// we want to send to the transfer service. the key is token and the value
+	// is blank (basically just the id generated in the transfer service)
+	token, err := transfer.Run(appURL, keyName, keyName, "", path, true)
+	if err != nil {
+		return "", err
+	}
+
+	return string(token), nil
+}
+
+// GetTokenIfExists will return the token from local storage if it exists
+func GetTokenIfExists(url *url.URL) (string, error) {
+	path, err := path.GenerateFilePathFromURL(url, keyName)
+	if err != nil {
+		return "", err
+	}
+	content, err := ioutil.ReadFile(path)
+	if err != nil {
+		return "", err
+	}
+	token, err := jose.ParseJWT(string(content))
+	if err != nil {
+		return "", err
+	}
+
+	return token.Encode(), nil
+}
+
+// RemoveTokenIfExists removes the a token from local storage if it exists
+func RemoveTokenIfExists(url *url.URL) error {
+	path, err := path.GenerateFilePathFromURL(url, keyName)
+	if err != nil {
+		return err
+	}
+	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+		return err
+	}
+
+	return nil
+}

cmd/cloudflared/token/token_test.go

@@ -0,0 +1,52 @@
+package token
+
+import (
+	"os"
+	"syscall"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSignalHandler(t *testing.T) {
+	sigHandler := signalHandler{signals: []os.Signal{syscall.SIGUSR1}}
+	handlerRan := false
+	done := make(chan struct{})
+	timer := time.NewTimer(time.Second)
+	sigHandler.register(func(){
+		handlerRan = true
+		done <- struct{}{}
+	})
+
+	p, err := os.FindProcess(os.Getpid())
+	require.Nil(t, err)
+	p.Signal(syscall.SIGUSR1)
+
+	// Blocks for up to one second to make sure the handler callback runs before the assert.
+	select {
+		case <- done:
+			assert.True(t, handlerRan)
+		case <- timer.C:
+			t.Fail()
+	}
+	sigHandler.deregister()
+}
+
+func TestSignalHandlerClose(t *testing.T) {
+	sigHandler := signalHandler{signals: []os.Signal{syscall.SIGUSR1}}
+	done := make(chan struct{})
+	timer := time.NewTimer(time.Second)
+	sigHandler.register(func(){done <- struct{}{}})
+	sigHandler.deregister()
+
+	p, err := os.FindProcess(os.Getpid())
+	require.Nil(t, err)
+	p.Signal(syscall.SIGUSR1)
+	select {
+	case <- done:
+		t.Fail()
+	case <- timer.C:
+	}
+}

cmd/cloudflared/transfer/transfer.go

@@ -10,13 +10,11 @@ import (
 	"net/http"
 	"net/url"
 	"os"
-	"path/filepath"
 	"time"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/encrypter"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/shell"
 	"github.com/cloudflare/cloudflared/log"
-	cli "gopkg.in/urfave/cli.v2"
 )
 
 const (
@@ -32,7 +30,7 @@ var logger = log.CreateLogger()
 // The "dance" we refer to is building a HTTP request, opening that in a browser waiting for
 // the user to complete an action, while it long polls in the background waiting for an
 // action to be completed to download the resource.
-func Run(c *cli.Context, transferURL *url.URL, resourceName, key, value, path string, shouldEncrypt bool) ([]byte, error) {
+func Run(transferURL *url.URL, resourceName, key, value, path string, shouldEncrypt bool) ([]byte, error) {
 	encrypterClient, err := encrypter.New("cloudflared_priv.pem", "cloudflared_pub.pem")
 	if err != nil {
 		return nil, err
@@ -42,23 +40,18 @@ func Run(c *cli.Context, transferURL *url.URL, resourceName, key, value, path st
 		return nil, err
 	}
 
+	// See AUTH-1423 for why we use stderr (the way git wraps ssh)
 	err = shell.OpenBrowser(requestURL)
 	if err != nil {
-		fmt.Fprintf(os.Stdout, "Please open the following URL and log in with your Cloudflare account:\n\n%s\n\nLeave cloudflared running to download the %s automatically.\n", resourceName, requestURL)
+		fmt.Fprintf(os.Stderr, "Please open the following URL and log in with your Cloudflare account:\n\n%s\n\nLeave cloudflared running to download the %s automatically.\n", requestURL, resourceName)
 	} else {
-		fmt.Fprintf(os.Stdout, "A browser window should have opened at the following URL:\n\n%s\n\nIf the browser failed to open, open it yourself and visit the URL above.\n", requestURL)
-	}
-
-	// for local debugging
-	baseURL := baseStoreURL
-	if c.IsSet("url") {
-		baseURL = c.String("url")
+		fmt.Fprintf(os.Stderr, "A browser window should have opened at the following URL:\n\n%s\n\nIf the browser failed to open, open it yourself and visit the URL above.\n", requestURL)
 	}
 
 	var resourceData []byte
 
 	if shouldEncrypt {
-		buf, key, err := transferRequest(baseURL + filepath.Join("transfer", encrypterClient.PublicKey()))
+		buf, key, err := transferRequest(baseStoreURL + "transfer/" + encrypterClient.PublicKey())
 		if err != nil {
 			return nil, err
 		}
@@ -74,7 +67,7 @@ func Run(c *cli.Context, transferURL *url.URL, resourceName, key, value, path st
 
 		resourceData = decrypted
 	} else {
-		buf, _, err := transferRequest(baseURL + filepath.Join(encrypterClient.PublicKey()))
+		buf, _, err := transferRequest(baseStoreURL + encrypterClient.PublicKey())
 		if err != nil {
 			return nil, err
 		}
@@ -90,21 +83,19 @@ func Run(c *cli.Context, transferURL *url.URL, resourceName, key, value, path st
 
 // BuildRequestURL creates a request suitable for a resource transfer.
 // it will return a constructed url based off the base url and query key/value provided.
-// follow will follow redirects.
-func buildRequestURL(baseURL *url.URL, key, value string, follow bool) (string, error) {
+// cli will build a url for cli transfer request.
+func buildRequestURL(baseURL *url.URL, key, value string, cli bool) (string, error) {
 	q := baseURL.Query()
 	q.Set(key, value)
 	baseURL.RawQuery = q.Encode()
-	if !follow {
+	if !cli {
 		return baseURL.String(), nil
 	}
 
-	response, err := http.Get(baseURL.String())
-	if err != nil {
-		return "", err
-	}
-	return response.Request.URL.String(), nil
-
+	q.Set("redirect_url", baseURL.String()) // we add the token as a query param on both the redirect_url
+	baseURL.RawQuery = q.Encode()           // and this actual baseURL.
+	baseURL.Path = "cdn-cgi/access/cli"
+	return baseURL.String(), nil
 }
 
 // transferRequest downloads the requested resource from the request URL

cmd/cloudflared/tunnel/cmd.go

@@ -1,28 +1,40 @@
 package tunnel
 
 import (
+	"context"
 	"fmt"
 	"io/ioutil"
+	"net"
+	"net/url"
 	"os"
+	"reflect"
 	"runtime/trace"
 	"sync"
-	"syscall"
 	"time"
 
-	"github.com/getsentry/raven-go"
-	"golang.org/x/crypto/ssh/terminal"
+	"github.com/cloudflare/cloudflared/dbconnect"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
 
+	"github.com/cloudflare/cloudflared/connection"
+	"github.com/cloudflare/cloudflared/supervisor"
+	"github.com/google/uuid"
+
+	"github.com/getsentry/raven-go"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
-	"github.com/cloudflare/cloudflared/cmd/sqlgateway"
 	"github.com/cloudflare/cloudflared/hello"
 	"github.com/cloudflare/cloudflared/metrics"
 	"github.com/cloudflare/cloudflared/origin"
+	"github.com/cloudflare/cloudflared/signal"
+	"github.com/cloudflare/cloudflared/tlsconfig"
 	"github.com/cloudflare/cloudflared/tunneldns"
+	"github.com/cloudflare/cloudflared/websocket"
 	"github.com/coreos/go-systemd/daemon"
 	"github.com/facebookgo/grace/gracenet"
 	"github.com/pkg/errors"
-	cli "gopkg.in/urfave/cli.v2"
+	"gopkg.in/urfave/cli.v2"
 	"gopkg.in/urfave/cli.v2/altsrc"
 )
 
@@ -53,20 +65,6 @@ func Commands() []*cli.Command {
 			},
 			Hidden: true,
 		},
-		{
-			Name:   "hello",
-			Action: helloWorld,
-			Usage:  "Run a simple \"Hello World\" server for testing Argo Tunnel.",
-			Flags: []cli.Flag{
-				&cli.IntFlag{
-					Name:  "port",
-					Usage: "Listen on the selected port.",
-					Value: 8080,
-				},
-			},
-			ArgsUsage: " ", // can't be the empty string or we get the default output
-			Hidden:    true,
-		},
 		{
 			Name:   "proxy-dns",
 			Action: tunneldns.Run,
@@ -100,60 +98,7 @@ func Commands() []*cli.Command {
 			ArgsUsage: " ", // can't be the empty string or we get the default output
 			Hidden:    false,
 		},
-		{
-			Name: "db",
-			Action: func(c *cli.Context) error {
-				tags := make(map[string]string)
-				tags["hostname"] = c.String("hostname")
-				raven.SetTagsContext(tags)
-
-				fmt.Printf("\nSQL Database Password: ")
-				pass, err := terminal.ReadPassword(int(syscall.Stdin))
-				if err != nil {
-					logger.Error(err)
-				}
-
-				go sqlgateway.StartProxy(c, logger, string(pass))
-
-				raven.CapturePanic(func() { err = tunnel(c) }, nil)
-				if err != nil {
-					raven.CaptureError(err, nil)
-				}
-				return err
-			},
-			Before: func(c *cli.Context) error {
-				if c.String("config") == "" {
-					logger.Warnf("Cannot determine default configuration path. No file %v in %v", defaultConfigFiles, config.DefaultConfigDirs)
-				}
-				inputSource, err := config.FindInputSourceContext(c)
-				if err != nil {
-					logger.WithError(err).Infof("Cannot load configuration from %s", c.String("config"))
-					return err
-				} else if inputSource != nil {
-					err := altsrc.ApplyInputSourceValues(c, inputSource, c.App.Flags)
-					if err != nil {
-						logger.WithError(err).Infof("Cannot apply configuration from %s", c.String("config"))
-						return err
-					}
-					logger.Infof("Applied configuration from %s", c.String("config"))
-				}
-				return nil
-			},
-			Usage: "SQL Gateway is an SQL over HTTP reverse proxy",
-			Flags: []cli.Flag{
-				&cli.BoolFlag{
-					Name:  "db",
-					Value: true,
-					Usage: "Enable the SQL Gateway Proxy",
-				},
-				&cli.StringFlag{
-					Name:  "address",
-					Value: "",
-					Usage: "Database connection string: db://user:pass",
-				},
-			},
-			Hidden: true,
-		},
+		dbConnectCmd(),
 	}
 
 	var subcommands []*cli.Command
@@ -166,6 +111,7 @@ func Commands() []*cli.Command {
 	cmds = append(cmds, &cli.Command{
 		Name:      "tunnel",
 		Action:    tunnel,
+		Before:    Before,
 		Category:  "Tunnel",
 		Usage:     "Make a locally-running web service accessible over the internet using Argo Tunnel.",
 		ArgsUsage: "[origin-url]",
@@ -203,24 +149,24 @@ func Init(v string, s, g chan struct{}) {
 }
 
 func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan struct{}) error {
-	raven.SetDSN(sentryDSN)
+	_ = raven.SetDSN(sentryDSN)
 	var wg sync.WaitGroup
 	listeners := gracenet.Net{}
 	errC := make(chan error)
-	connectedSignal := make(chan struct{})
+	connectedSignal := signal.New(make(chan struct{}))
 	dnsReadySignal := make(chan struct{})
 
 	if c.String("config") == "" {
-		logger.Warnf("Cannot determine default configuration path. No file %v in %v", defaultConfigFiles, config.DefaultConfigDirs)
+		logger.Warnf("Cannot determine default configuration path. No file %v in %v", config.DefaultConfigFiles, config.DefaultConfigDirs)
 	}
 
 	if err := configMainLogger(c); err != nil {
 		return errors.Wrap(err, "Error configuring logger")
 	}
 
-	protoLogger, err := configProtoLogger(c)
+	transportLogger, err := configTransportLogger(c)
 	if err != nil {
-		return errors.Wrap(err, "Error configuring protocol logger")
+		return errors.Wrap(err, "Error configuring transport logger")
 	}
 
 	if c.IsSet("trace-output") {
@@ -231,12 +177,15 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 
 		defer func() {
 			if err := tmpTraceFile.Close(); err != nil {
-				logger.WithError(err).Error("Failed to close trace output file %s", tmpTraceFile.Name())
+				logger.WithError(err).Errorf("Failed to close trace output file %s", tmpTraceFile.Name())
 			}
 			if err := os.Rename(tmpTraceFile.Name(), c.String("trace-output")); err != nil {
 				logger.WithError(err).Errorf("Failed to rename temporary trace output file %s to %s", tmpTraceFile.Name(), c.String("trace-output"))
 			} else {
-				os.Remove(tmpTraceFile.Name())
+				err := os.Remove(tmpTraceFile.Name())
+				if err != nil {
+					logger.WithError(err).Errorf("Failed to remove the temporary trace file %s", tmpTraceFile.Name())
+				}
 			}
 		}()
 
@@ -248,7 +197,7 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 	}
 
 	if c.String("logfile") != "" {
-		if err := initLogFile(c, logger, protoLogger); err != nil {
+		if err := initLogFile(c, logger, transportLogger); err != nil {
 			logger.Error(err)
 		}
 	}
@@ -257,9 +206,8 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 		return err
 	}
 
-	buildInfo := origin.GetBuildInfo()
-	logger.Infof("Build info: %+v", *buildInfo)
-	logger.Infof("Version %s", version)
+	buildInfo := buildinfo.GetBuildInfo(version)
+	buildInfo.Log(logger)
 	logClientOptions(c)
 
 	if c.IsSet("proxy-dns") {
@@ -275,16 +223,6 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 	// Wait for proxy-dns to come up (if used)
 	<-dnsReadySignal
 
-	// update needs to be after DNS proxy is up to resolve equinox server address
-	if updater.IsAutoupdateEnabled(c) {
-		logger.Infof("Autoupdate frequency is set to %v", c.Duration("autoupdate-freq"))
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			errC <- updater.Autoupdate(c.Duration("autoupdate-freq"), &listeners, shutdownC)
-		}()
-	}
-
 	metricsListener, err := listeners.Listen("tcp", c.String("metrics"))
 	if err != nil {
 		logger.WithError(err).Error("Error opening metrics server listener")
@@ -302,14 +240,42 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 		go writePidFile(connectedSignal, c.String("pidfile"))
 	}
 
+	cloudflaredID, err := uuid.NewRandom()
+	if err != nil {
+		logger.WithError(err).Error("Cannot generate cloudflared ID")
+		return err
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() {
+		<-shutdownC
+		cancel()
+	}()
+
+	if c.IsSet("use-declarative-tunnels") {
+		return startDeclarativeTunnel(ctx, c, cloudflaredID, buildInfo, &listeners)
+	}
+
+	// update needs to be after DNS proxy is up to resolve equinox server address
+	if updater.IsAutoupdateEnabled(c) {
+		logger.Infof("Autoupdate frequency is set to %v", c.Duration("autoupdate-freq"))
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			autoupdater := updater.NewAutoUpdater(c.Duration("autoupdate-freq"), &listeners)
+			errC <- autoupdater.Run(ctx)
+		}()
+	}
+
 	// Serve DNS proxy stand-alone if no hostname or tag or app is going to run
 	if dnsProxyStandAlone(c) {
-		close(connectedSignal)
+		connectedSignal.Notify()
 		// no grace period, handle SIGINT/SIGTERM immediately
 		return waitToShutdown(&wg, errC, shutdownC, graceShutdownC, 0)
 	}
 
 	if c.IsSet("hello-world") {
+		logger.Infof("hello-world set")
 		helloListener, err := hello.CreateTLSListener("127.0.0.1:")
 		if err != nil {
 			logger.WithError(err).Error("Cannot start Hello World Server")
@@ -324,7 +290,21 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 		c.Set("url", "https://"+helloListener.Addr().String())
 	}
 
-	tunnelConfig, err := prepareTunnelConfig(c, buildInfo, version, logger, protoLogger)
+	if host := hostnameFromURI(c.String("url")); host != "" {
+		listener, err := net.Listen("tcp", "127.0.0.1:")
+		if err != nil {
+			logger.WithError(err).Error("Cannot start Websocket Proxy Server")
+			return errors.Wrap(err, "Cannot start Websocket Proxy Server")
+		}
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			errC <- websocket.StartProxyServer(logger, listener, host, shutdownC)
+		}()
+		c.Set("url", "http://"+listener.Addr().String())
+	}
+
+	tunnelConfig, err := prepareTunnelConfig(c, buildInfo, version, logger, transportLogger)
 	if err != nil {
 		return err
 	}
@@ -332,12 +312,153 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
-		errC <- origin.StartTunnelDaemon(tunnelConfig, graceShutdownC, connectedSignal)
+		errC <- origin.StartTunnelDaemon(ctx, tunnelConfig, connectedSignal, cloudflaredID)
 	}()
 
 	return waitToShutdown(&wg, errC, shutdownC, graceShutdownC, c.Duration("grace-period"))
 }
 
+func Before(c *cli.Context) error {
+	if c.String("config") == "" {
+		logger.Debugf("Cannot determine default configuration path. No file %v in %v", config.DefaultConfigFiles, config.DefaultConfigDirs)
+	}
+	inputSource, err := config.FindInputSourceContext(c)
+	if err != nil {
+		logger.WithError(err).Errorf("Cannot load configuration from %s", c.String("config"))
+		return err
+	} else if inputSource != nil {
+		err := altsrc.ApplyInputSourceValues(c, inputSource, c.App.Flags)
+		if err != nil {
+			logger.WithError(err).Errorf("Cannot apply configuration from %s", c.String("config"))
+			return err
+		}
+		logger.Debugf("Applied configuration from %s", c.String("config"))
+	}
+	return nil
+}
+
+func startDeclarativeTunnel(ctx context.Context,
+	c *cli.Context,
+	cloudflaredID uuid.UUID,
+	buildInfo *buildinfo.BuildInfo,
+	listeners *gracenet.Net,
+) error {
+	reverseProxyOrigin, err := defaultOriginConfig(c)
+	if err != nil {
+		logger.WithError(err)
+		return err
+	}
+	reverseProxyConfig, err := pogs.NewReverseProxyConfig(
+		c.String("hostname"),
+		reverseProxyOrigin,
+		c.Uint64("retries"),
+		c.Duration("proxy-connection-timeout"),
+		c.Uint64("compression-quality"),
+	)
+	if err != nil {
+		logger.WithError(err).Error("Cannot initialize default client config because reverse proxy config is invalid")
+		return err
+	}
+	defaultClientConfig := &pogs.ClientConfig{
+		Version: pogs.InitVersion(),
+		SupervisorConfig: &pogs.SupervisorConfig{
+			AutoUpdateFrequency:    c.Duration("autoupdate-freq"),
+			MetricsUpdateFrequency: c.Duration("metrics-update-freq"),
+			GracePeriod:            c.Duration("grace-period"),
+		},
+		EdgeConnectionConfig: &pogs.EdgeConnectionConfig{
+			NumHAConnections:    uint8(c.Int("ha-connections")),
+			HeartbeatInterval:   c.Duration("heartbeat-interval"),
+			Timeout:             c.Duration("dial-edge-timeout"),
+			MaxFailedHeartbeats: c.Uint64("heartbeat-count"),
+		},
+		DoHProxyConfigs:     []*pogs.DoHProxyConfig{},
+		ReverseProxyConfigs: []*pogs.ReverseProxyConfig{reverseProxyConfig},
+	}
+
+	autoupdater := updater.NewAutoUpdater(defaultClientConfig.SupervisorConfig.AutoUpdateFrequency, listeners)
+
+	originCert, err := getOriginCert(c)
+	if err != nil {
+		logger.WithError(err).Error("error getting origin cert")
+		return err
+	}
+	toEdgeTLSConfig, err := tlsconfig.CreateTunnelConfig(c)
+	if err != nil {
+		logger.WithError(err).Error("unable to create TLS config to connect with edge")
+		return err
+	}
+
+	tags, err := NewTagSliceFromCLI(c.StringSlice("tag"))
+	if err != nil {
+		logger.WithError(err).Error("unable to parse tag")
+		return err
+	}
+
+	var scope pogs.Scope
+	if c.IsSet("group") == c.IsSet("system-name") {
+		err = fmt.Errorf("exactly one of --group or --system-name must be specified")
+		logger.WithError(err).Error("unable to determine scope")
+		return err
+	} else if c.IsSet("group") {
+		scope = pogs.NewGroup(c.String("group"))
+	} else {
+		scope = pogs.NewSystemName(c.String("system-name"))
+	}
+
+	cloudflaredConfig := &connection.CloudflaredConfig{
+		BuildInfo:     buildInfo,
+		CloudflaredID: cloudflaredID,
+		Scope:         scope,
+		Tags:          tags,
+	}
+
+	serviceDiscoverer, err := serviceDiscoverer(c, logger)
+	if err != nil {
+		logger.WithError(err).Error("unable to create service discoverer")
+		return err
+	}
+	supervisor, err := supervisor.NewSupervisor(defaultClientConfig, originCert, toEdgeTLSConfig,
+		serviceDiscoverer, cloudflaredConfig, autoupdater, updater.SupportAutoUpdate(), logger)
+	if err != nil {
+		logger.WithError(err).Error("unable to create Supervisor")
+		return err
+	}
+	return supervisor.Run(ctx)
+}
+
+func defaultOriginConfig(c *cli.Context) (pogs.OriginConfig, error) {
+	if c.IsSet("hello-world") {
+		return &pogs.HelloWorldOriginConfig{}, nil
+	}
+	originConfig := &pogs.HTTPOriginConfig{
+		TCPKeepAlive:           c.Duration("proxy-tcp-keepalive"),
+		DialDualStack:          !c.Bool("proxy-no-happy-eyeballs"),
+		TLSHandshakeTimeout:    c.Duration("proxy-tls-timeout"),
+		TLSVerify:              !c.Bool("no-tls-verify"),
+		OriginCAPool:           c.String("origin-ca-pool"),
+		OriginServerName:       c.String("origin-server-name"),
+		MaxIdleConnections:     c.Uint64("proxy-keepalive-connections"),
+		IdleConnectionTimeout:  c.Duration("proxy-keepalive-timeout"),
+		ProxyConnectionTimeout: c.Duration("proxy-connection-timeout"),
+		ExpectContinueTimeout:  c.Duration("proxy-expect-continue-timeout"),
+		ChunkedEncoding:        c.Bool("no-chunked-encoding"),
+	}
+	if c.IsSet("unix-socket") {
+		unixSocket, err := config.ValidateUnixSocket(c)
+		if err != nil {
+			return nil, errors.Wrap(err, "error validating --unix-socket")
+		}
+		originConfig.URLString = unixSocket
+	}
+	originAddr, err := config.ValidateUrl(c)
+	if err != nil {
+		return nil, errors.Wrap(err, "error validating origin URL")
+	}
+	originConfig.URLString = originAddr
+	return originConfig, nil
+}
+
 func waitToShutdown(wg *sync.WaitGroup,
 	errC chan error,
 	shutdownC, graceShutdownC chan struct{},
@@ -365,13 +486,13 @@ func waitToShutdown(wg *sync.WaitGroup,
 	return err
 }
 
-func notifySystemd(waitForSignal chan struct{}) {
-	<-waitForSignal
+func notifySystemd(waitForSignal *signal.Signal) {
+	<-waitForSignal.Wait()
 	daemon.SdNotify(false, "READY=1")
 }
 
-func writePidFile(waitForSignal chan struct{}, pidFile string) {
-	<-waitForSignal
+func writePidFile(waitForSignal *signal.Signal, pidFile string) {
+	<-waitForSignal.Wait()
 	file, err := os.Create(pidFile)
 	if err != nil {
 		logger.WithError(err).Errorf("Unable to write pid to %s", pidFile)
@@ -380,6 +501,81 @@ func writePidFile(waitForSignal chan struct{}, pidFile string) {
 	fmt.Fprintf(file, "%d", os.Getpid())
 }
 
+func hostnameFromURI(uri string) string {
+	u, err := url.Parse(uri)
+	if err != nil {
+		return ""
+	}
+	switch u.Scheme {
+	case "ssh":
+		return addPortIfMissing(u, 22)
+	case "rdp":
+		return addPortIfMissing(u, 3389)
+	}
+	return ""
+}
+
+func addPortIfMissing(uri *url.URL, port int) string {
+	if uri.Port() != "" {
+		return uri.Host
+	}
+	return fmt.Sprintf("%s:%d", uri.Hostname(), port)
+}
+
+func dbConnectCmd() *cli.Command {
+	cmd := dbconnect.Cmd()
+
+	// Append the tunnel commands so users can customize the daemon settings.
+	cmd.Flags = appendFlags(Flags(), cmd.Flags...)
+
+	// Override before to run tunnel validation before dbconnect validation.
+	cmd.Before = func(c *cli.Context) error {
+		err := Before(c)
+		if err == nil {
+			err = dbconnect.CmdBefore(c)
+		}
+		return err
+	}
+
+	// Override action to setup the Proxy, then if successful, start the tunnel daemon.
+	cmd.Action = func(c *cli.Context) error {
+		err := dbconnect.CmdAction(c)
+		if err == nil {
+			err = tunnel(c)
+		}
+		return err
+	}
+
+	return cmd
+}
+
+// appendFlags will append extra flags to a slice of flags.
+//
+// The cli package will panic if two flags exist with the same name,
+// so if extraFlags contains a flag that was already defined, modify the
+// original flags to use the extra version.
+func appendFlags(flags []cli.Flag, extraFlags ...cli.Flag) []cli.Flag {
+	for _, extra := range extraFlags {
+		var found bool
+
+		// Check if an extra flag overrides an existing flag.
+		for i, flag := range flags {
+			if reflect.DeepEqual(extra.Names(), flag.Names()) {
+				flags[i] = extra
+				found = true
+				break
+			}
+		}
+
+		// Append the extra flag if it has nothing to override.
+		if !found {
+			flags = append(flags, extra)
+		}
+	}
+
+	return flags
+}
+
 func tunnelFlags(shouldHide bool) []cli.Flag {
 	return []cli.Flag{
 		&cli.StringFlag{
@@ -390,8 +586,8 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 		},
 		altsrc.NewDurationFlag(&cli.DurationFlag{
 			Name:   "autoupdate-freq",
-			Usage:  "Autoupdate frequency. Default is 24h.",
-			Value:  time.Hour * 24,
+			Usage:  fmt.Sprintf("Autoupdate frequency. Default is %v.", updater.DefaultCheckUpdateFreq),
+			Value:  updater.DefaultCheckUpdateFreq,
 			Hidden: shouldHide,
 		}),
 		altsrc.NewBoolFlag(&cli.BoolFlag{
@@ -413,8 +609,8 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			Hidden:  true,
 		}),
 		altsrc.NewStringFlag(&cli.StringFlag{
-			Name:    "cacert",
-			Usage:   "Certificate Authority authenticating the Cloudflare tunnel connection.",
+			Name:    tlsconfig.CaCertFlag,
+			Usage:   "Certificate Authority authenticating connections with Cloudflare's edge network.",
 			EnvVars: []string{"TUNNEL_CACERT"},
 			Hidden:  true,
 		}),
@@ -432,7 +628,7 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			Hidden:  shouldHide,
 		}),
 		altsrc.NewStringFlag(&cli.StringFlag{
-			Name:    "origin-ca-pool",
+			Name:    tlsconfig.OriginCAPoolFlag,
 			Usage:   "Path to the CA for the certificate of your origin. This option should be used only if your certificate is not signed by Cloudflare.",
 			EnvVars: []string{"TUNNEL_ORIGIN_CA_POOL"},
 			Hidden:  shouldHide,
@@ -444,6 +640,12 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"TUNNEL_URL"},
 			Hidden:  shouldHide,
 		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    "unix-socket",
+			Usage:   "Path to unix socket to use instead of --url",
+			EnvVars: []string{"TUNNEL_UNIX_SOCKET"},
+			Hidden:  shouldHide,
+		}),
 		altsrc.NewStringFlag(&cli.StringFlag{
 			Name:    "hostname",
 			Usage:   "Set a hostname on a Cloudflare zone to route traffic through this tunnel.",
@@ -521,15 +723,16 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 		altsrc.NewStringFlag(&cli.StringFlag{
 			Name:    "loglevel",
 			Value:   "info",
-			Usage:   "Application logging level {panic, fatal, error, warn, info, debug}",
+			Usage:   "Application logging level {panic, fatal, error, warn, info, debug}. " + debugLevelWarning,
 			EnvVars: []string{"TUNNEL_LOGLEVEL"},
 			Hidden:  shouldHide,
 		}),
 		altsrc.NewStringFlag(&cli.StringFlag{
-			Name:    "proto-loglevel",
+			Name:    "transport-loglevel",
+			Aliases: []string{"proto-loglevel"}, // This flag used to be called proto-loglevel
 			Value:   "warn",
-			Usage:   "Protocol logging level {panic, fatal, error, warn, info, debug}",
-			EnvVars: []string{"TUNNEL_PROTO_LOGLEVEL"},
+			Usage:   "Transport logging level(previously called protocol logging level) {panic, fatal, error, warn, info, debug}",
+			EnvVars: []string{"TUNNEL_PROTO_LOGLEVEL", "TUNNEL_TRANSPORT_LOGLEVEL"},
 			Hidden:  shouldHide,
 		}),
 		altsrc.NewUintFlag(&cli.UintFlag{
@@ -598,6 +801,18 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			Value:  time.Second * 90,
 			Hidden: shouldHide,
 		}),
+		altsrc.NewDurationFlag(&cli.DurationFlag{
+			Name:   "proxy-connection-timeout",
+			Usage:  "HTTP proxy timeout for closing an idle connection",
+			Value:  time.Second * 90,
+			Hidden: shouldHide,
+		}),
+		altsrc.NewDurationFlag(&cli.DurationFlag{
+			Name:   "proxy-expect-continue-timeout",
+			Usage:  "HTTP proxy timeout for closing an idle connection",
+			Value:  time.Second * 90,
+			Hidden: shouldHide,
+		}),
 		altsrc.NewBoolFlag(&cli.BoolFlag{
 			Name:    "proxy-dns",
 			Usage:   "Run a DNS over HTTPS proxy server.",
@@ -651,5 +866,30 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"TUNNEL_TRACE_OUTPUT"},
 			Hidden:  shouldHide,
 		}),
+		altsrc.NewBoolFlag(&cli.BoolFlag{
+			Name:    "use-declarative-tunnels",
+			Usage:   "Test establishing connections with declarative tunnel methods.",
+			EnvVars: []string{"TUNNEL_USE_DECLARATIVE"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    "system-name",
+			Usage:   "Unique identifier for this cloudflared instance. It can be configured individually in the Declarative Tunnel UI. Mutually exclusive with `--group`.",
+			EnvVars: []string{"TUNNEL_SYSTEM_NAME"},
+			Hidden:  true,
+		}),
+		altsrc.NewStringFlag(&cli.StringFlag{
+			Name:    "group",
+			Usage:   "Name of a group of cloudflared instances, of which this instance should be an identical copy. They can be configured collectively in the Declarative Tunnel UI. Mutually exclusive with `--system-name`.",
+			EnvVars: []string{"TUNNEL_GROUP"},
+			Hidden:  true,
+		}),
+		altsrc.NewDurationFlag(&cli.DurationFlag{
+			Name:    "dial-edge-timeout",
+			Usage:   "Maximum wait time to set up a connection with the edge",
+			Value:   time.Second * 15,
+			EnvVars: []string{"DIAL_EDGE_TIMEOUT"},
+			Hidden:  true,
+		}),
 	}
 }

cmd/cloudflared/tunnel/cmd_test.go

@@ -0,0 +1,17 @@
+package tunnel
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestHostnameFromURI(t *testing.T) {
+	assert.Equal(t, "awesome.warptunnels.horse:22", hostnameFromURI("ssh://awesome.warptunnels.horse:22"))
+	assert.Equal(t, "awesome.warptunnels.horse:22", hostnameFromURI("ssh://awesome.warptunnels.horse"))
+	assert.Equal(t, "awesome.warptunnels.horse:2222", hostnameFromURI("ssh://awesome.warptunnels.horse:2222"))
+	assert.Equal(t, "localhost:3389", hostnameFromURI("rdp://localhost"))
+	assert.Equal(t, "localhost:3390", hostnameFromURI("rdp://localhost:3390"))
+	assert.Equal(t, "", hostnameFromURI("trash"))
+	assert.Equal(t, "", hostnameFromURI("https://awesomesauce.com"))
+}

cmd/cloudflared/tunnel/configuration.go

@@ -1,49 +1,45 @@
 package tunnel
 
 import (
+	"context"
 	"crypto/tls"
-	"crypto/x509"
-	"encoding/hex"
 	"fmt"
 	"io/ioutil"
-	"math/rand"
 	"net"
 	"net/http"
 	"os"
 	"path/filepath"
-	"runtime"
 	"strings"
 	"time"
 
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/cloudflare/cloudflared/connection"
 	"github.com/cloudflare/cloudflared/origin"
 	"github.com/cloudflare/cloudflared/tlsconfig"
 	tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
 	"github.com/cloudflare/cloudflared/validation"
-	"golang.org/x/crypto/ssh/terminal"
-
-	"github.com/sirupsen/logrus"
-	"gopkg.in/urfave/cli.v2"
 
+	"github.com/google/uuid"
 	"github.com/mitchellh/go-homedir"
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"golang.org/x/crypto/ssh/terminal"
+	"gopkg.in/urfave/cli.v2"
 )
 
 var (
-	defaultConfigFiles = []string{"config.yml", "config.yaml"}
-	developerPortal    = "https://developers.cloudflare.com/argo-tunnel"
-	quickStartUrl      = developerPortal + "/quickstart/quickstart/"
-	serviceUrl         = developerPortal + "/reference/service/"
-	argumentsUrl       = developerPortal + "/reference/arguments/"
+	developerPortal = "https://developers.cloudflare.com/argo-tunnel"
+	quickStartUrl   = developerPortal + "/quickstart/quickstart/"
+	serviceUrl      = developerPortal + "/reference/service/"
+	argumentsUrl    = developerPortal + "/reference/arguments/"
 )
 
-const defaultCredentialFile = "cert.pem"
-
-// returns the first path that contains a cert.pem file. If none of the defaultConfigDirs
-// (differs by OS for legacy reasons) contains a cert.pem file, return empty string
+// returns the first path that contains a cert.pem file. If none of the DefaultConfigDirs
+// contains a cert.pem file, return empty string
 func findDefaultOriginCertPath() string {
 	for _, defaultConfigDir := range config.DefaultConfigDirs {
-		originCertPath, _ := homedir.Expand(filepath.Join(defaultConfigDir, defaultCredentialFile))
+		originCertPath, _ := homedir.Expand(filepath.Join(defaultConfigDir, config.DefaultCredentialFile))
 		if ok, _ := config.FileExists(originCertPath); ok {
 			return originCertPath
 		}
@@ -51,11 +47,13 @@ func findDefaultOriginCertPath() string {
 	return ""
 }
 
-func generateRandomClientID() string {
-	r := rand.New(rand.NewSource(time.Now().UnixNano()))
-	id := make([]byte, 32)
-	r.Read(id)
-	return hex.EncodeToString(id)
+func generateRandomClientID(logger *logrus.Logger) (string, error) {
+	u, err := uuid.NewRandom()
+	if err != nil {
+		logger.WithError(err).Error("couldn't create UUID for client ID")
+		return "", err
+	}
+	return u.String(), nil
 }
 
 func handleDeprecatedOptions(c *cli.Context) error {
@@ -67,26 +65,21 @@ func handleDeprecatedOptions(c *cli.Context) error {
 	return nil
 }
 
-// validate url. It can be either from --url or argument
-func validateUrl(c *cli.Context) (string, error) {
-	var url = c.String("url")
-	if c.NArg() > 0 {
-		if c.IsSet("url") {
-			return "", errors.New("Specified origin urls using both --url and argument. Decide which one you want, I can only support one.")
-		}
-		url = c.Args().Get(0)
-	}
-	validUrl, err := validation.ValidateUrl(url)
-	return validUrl, err
-}
-
 func logClientOptions(c *cli.Context) {
 	flags := make(map[string]interface{})
 	for _, flag := range c.LocalFlagNames() {
 		flags[flag] = c.Generic(flag)
 	}
+
+	sliceFlags := []string{"header", "tag", "proxy-dns-upstream", "upstream", "edge"}
+	for _, sliceFlag := range sliceFlags {
+		if len(c.StringSlice(sliceFlag)) > 0 {
+			flags[sliceFlag] = strings.Join(c.StringSlice(sliceFlag), ", ")
+		}
+	}
+
 	if len(flags) > 0 {
-		logger.Infof("Flags %v", flags)
+		logger.WithFields(flags).Info("Flags")
 	}
 
 	envs := make(map[string]string)
@@ -111,7 +104,7 @@ func dnsProxyStandAlone(c *cli.Context) bool {
 
 func getOriginCert(c *cli.Context) ([]byte, error) {
 	if c.String("origincert") == "" {
-		logger.Warnf("Cannot determine default origin certificate path. No file %s in %v", defaultCredentialFile, config.DefaultConfigDirs)
+		logger.Warnf("Cannot determine default origin certificate path. No file %s in %v", config.DefaultCredentialFile, config.DefaultConfigDirs)
 		if isRunningFromTerminal() {
 			logger.Errorf("You need to specify the origin certificate path with --origincert option, or set TUNNEL_ORIGIN_CERT environment variable. See %s for more information.", argumentsUrl)
 			return nil, fmt.Errorf("Client didn't specify origincert path when running from terminal")
@@ -152,15 +145,24 @@ If you don't have a certificate signed by Cloudflare, run the command:
 	return originCert, nil
 }
 
-func prepareTunnelConfig(c *cli.Context, buildInfo *origin.BuildInfo, version string, logger, protoLogger *logrus.Logger) (*origin.TunnelConfig, error) {
+func prepareTunnelConfig(
+	c *cli.Context,
+	buildInfo *buildinfo.BuildInfo,
+	version string, logger,
+	transportLogger *logrus.Logger,
+) (*origin.TunnelConfig, error) {
 	hostname, err := validation.ValidateHostname(c.String("hostname"))
 	if err != nil {
 		logger.WithError(err).Error("Invalid hostname")
 		return nil, errors.Wrap(err, "Invalid hostname")
 	}
+	isFreeTunnel := hostname == ""
 	clientID := c.String("id")
 	if !c.IsSet("id") {
-		clientID = generateRandomClientID()
+		clientID, err = generateRandomClientID(logger)
+		if err != nil {
+			return nil, err
+		}
 	}
 
 	tags, err := NewTagSliceFromCLI(c.StringSlice("tag"))
@@ -171,19 +173,21 @@ func prepareTunnelConfig(c *cli.Context, buildInfo *origin.BuildInfo, version st
 
 	tags = append(tags, tunnelpogs.Tag{Name: "ID", Value: clientID})
 
-	originURL, err := validateUrl(c)
+	originURL, err := config.ValidateUrl(c)
 	if err != nil {
 		logger.WithError(err).Error("Error validating origin URL")
 		return nil, errors.Wrap(err, "Error validating origin URL")
 	}
-	logger.Infof("Proxying tunnel requests to %s", originURL)
 
-	originCert, err := getOriginCert(c)
-	if err != nil {
-		return nil, errors.Wrap(err, "Error getting origin cert")
+	var originCert []byte
+	if !isFreeTunnel {
+		originCert, err = getOriginCert(c)
+		if err != nil {
+			return nil, errors.Wrap(err, "Error getting origin cert")
+		}
 	}
 
-	originCertPool, err := loadCertPool(c, logger)
+	originCertPool, err := tlsconfig.LoadOriginCA(c, logger)
 	if err != nil {
 		logger.WithError(err).Error("Error loading cert pool")
 		return nil, errors.Wrap(err, "Error loading cert pool")
@@ -191,12 +195,7 @@ func prepareTunnelConfig(c *cli.Context, buildInfo *origin.BuildInfo, version st
 
 	tunnelMetrics := origin.NewTunnelMetrics()
 	httpTransport := &http.Transport{
-		Proxy: http.ProxyFromEnvironment,
-		DialContext: (&net.Dialer{
-			Timeout:   c.Duration("proxy-connect-timeout"),
-			KeepAlive: c.Duration("proxy-tcp-keepalive"),
-			DualStack: !c.Bool("proxy-no-happy-eyeballs"),
-		}).DialContext,
+		Proxy:                 http.ProxyFromEnvironment,
 		MaxIdleConns:          c.Int("proxy-keepalive-connections"),
 		IdleConnTimeout:       c.Duration("proxy-keepalive-timeout"),
 		TLSHandshakeTimeout:   c.Duration("proxy-tls-timeout"),
@@ -204,69 +203,84 @@ func prepareTunnelConfig(c *cli.Context, buildInfo *origin.BuildInfo, version st
 		TLSClientConfig:       &tls.Config{RootCAs: originCertPool, InsecureSkipVerify: c.IsSet("no-tls-verify")},
 	}
 
+	dialContext := (&net.Dialer{
+		Timeout:   c.Duration("proxy-connect-timeout"),
+		KeepAlive: c.Duration("proxy-tcp-keepalive"),
+		DualStack: !c.Bool("proxy-no-happy-eyeballs"),
+	}).DialContext
+
+	if c.IsSet("unix-socket") {
+		unixSocket, err := config.ValidateUnixSocket(c)
+		if err != nil {
+			logger.WithError(err).Error("Error validating --unix-socket")
+			return nil, errors.Wrap(err, "Error validating --unix-socket")
+		}
+
+		logger.Infof("Proxying tunnel requests to unix:%s", unixSocket)
+		httpTransport.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) {
+			// if --unix-socket specified, enforce network type "unix"
+			return dialContext(ctx, "unix", unixSocket)
+		}
+	} else {
+		logger.Infof("Proxying tunnel requests to %s", originURL)
+		httpTransport.DialContext = dialContext
+	}
+
 	if !c.IsSet("hello-world") && c.IsSet("origin-server-name") {
 		httpTransport.TLSClientConfig.ServerName = c.String("origin-server-name")
 	}
 
-	err = validation.ValidateHTTPService(originURL, httpTransport)
+	err = validation.ValidateHTTPService(originURL, hostname, httpTransport)
 	if err != nil {
 		logger.WithError(err).Error("unable to connect to the origin")
 		return nil, errors.Wrap(err, "unable to connect to the origin")
 	}
 
+	toEdgeTLSConfig, err := tlsconfig.CreateTunnelConfig(c)
+	if err != nil {
+		logger.WithError(err).Error("unable to create TLS config to connect with edge")
+		return nil, errors.Wrap(err, "unable to create TLS config to connect with edge")
+	}
+
 	return &origin.TunnelConfig{
-		EdgeAddrs:          c.StringSlice("edge"),
-		OriginUrl:          originURL,
-		Hostname:           hostname,
-		OriginCert:         originCert,
-		TlsConfig:          tlsconfig.CreateTunnelConfig(c, c.StringSlice("edge")),
-		ClientTlsConfig:    httpTransport.TLSClientConfig,
-		Retries:            c.Uint("retries"),
-		HeartbeatInterval:  c.Duration("heartbeat-interval"),
-		MaxHeartbeats:      c.Uint64("heartbeat-count"),
-		ClientID:           clientID,
-		BuildInfo:          buildInfo,
-		ReportedVersion:    version,
-		LBPool:             c.String("lb-pool"),
-		Tags:               tags,
-		HAConnections:      c.Int("ha-connections"),
-		HTTPTransport:      httpTransport,
-		Metrics:            tunnelMetrics,
-		MetricsUpdateFreq:  c.Duration("metrics-update-freq"),
-		ProtocolLogger:     protoLogger,
-		Logger:             logger,
-		IsAutoupdated:      c.Bool("is-autoupdated"),
-		GracePeriod:        c.Duration("grace-period"),
-		RunFromTerminal:    isRunningFromTerminal(),
-		NoChunkedEncoding:  c.Bool("no-chunked-encoding"),
-		CompressionQuality: c.Uint64("compression-quality"),
+		BuildInfo:            buildInfo,
+		ClientID:             clientID,
+		ClientTlsConfig:      httpTransport.TLSClientConfig,
+		CompressionQuality:   c.Uint64("compression-quality"),
+		EdgeAddrs:            c.StringSlice("edge"),
+		GracePeriod:          c.Duration("grace-period"),
+		HAConnections:        c.Int("ha-connections"),
+		HTTPTransport:        httpTransport,
+		HeartbeatInterval:    c.Duration("heartbeat-interval"),
+		Hostname:             hostname,
+		IncidentLookup:       origin.NewIncidentLookup(),
+		IsAutoupdated:        c.Bool("is-autoupdated"),
+		IsFreeTunnel:         isFreeTunnel,
+		LBPool:               c.String("lb-pool"),
+		Logger:               logger,
+		MaxHeartbeats:        c.Uint64("heartbeat-count"),
+		Metrics:              tunnelMetrics,
+		MetricsUpdateFreq:    c.Duration("metrics-update-freq"),
+		NoChunkedEncoding:    c.Bool("no-chunked-encoding"),
+		OriginCert:           originCert,
+		OriginUrl:            originURL,
+		ReportedVersion:      version,
+		Retries:              c.Uint("retries"),
+		RunFromTerminal:      isRunningFromTerminal(),
+		Tags:                 tags,
+		TlsConfig:            toEdgeTLSConfig,
+		TransportLogger:      transportLogger,
+		UseDeclarativeTunnel: c.Bool("use-declarative-tunnels"),
 	}, nil
 }
 
-func loadCertPool(c *cli.Context, logger *logrus.Logger) (*x509.CertPool, error) {
-	const originCAPoolFlag = "origin-ca-pool"
-	originCAPoolFilename := c.String(originCAPoolFlag)
-	var originCustomCAPool []byte
-
-	if originCAPoolFilename != "" {
-		var err error
-		originCustomCAPool, err = ioutil.ReadFile(originCAPoolFilename)
-		if err != nil {
-			return nil, errors.Wrap(err, fmt.Sprintf("unable to read the file %s for --%s", originCAPoolFilename, originCAPoolFlag))
-		}
+func serviceDiscoverer(c *cli.Context, logger *logrus.Logger) (connection.EdgeServiceDiscoverer, error) {
+	// If --edge is specfied, resolve edge server addresses
+	if len(c.StringSlice("edge")) > 0 {
+		return connection.NewEdgeHostnameResolver(c.StringSlice("edge"))
 	}
-
-	originCertPool, err := tlsconfig.LoadOriginCertPool(originCustomCAPool)
-	if err != nil {
-		return nil, errors.Wrap(err, "error loading the certificate pool")
-	}
-
-	// Windows users should be notified that they can use the flag
-	if runtime.GOOS == "windows" && originCAPoolFilename == "" {
-		logger.Infof("cloudflared does not support loading the system root certificate pool on Windows. Please use the --%s to specify it", originCAPoolFlag)
-	}
-
-	return originCertPool, nil
+	// Otherwise lookup edge server addresses through service discovery
+	return connection.NewEdgeAddrResolver(logger)
 }
 
 func isRunningFromTerminal() bool {

cmd/cloudflared/tunnel/configuration_test.go

@@ -0,0 +1,214 @@
+// +build ignore
+// TODO: Remove the above build tag and include this test when we start compiling with Golang 1.10.0+
+
+package tunnel
+
+import (
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/asn1"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+// Generated using `openssl req -newkey rsa:512 -nodes -x509 -days 3650`
+var samplePEM = []byte(`
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+`)
+
+var systemCertPoolSubjects []*pkix.Name
+
+type certificateFixture struct {
+	ou string
+	cn string
+}
+
+func TestMain(m *testing.M) {
+	systemCertPool, err := x509.SystemCertPool()
+	if isUnrecoverableError(err) {
+		os.Exit(1)
+	}
+
+	if systemCertPool == nil {
+		// On Windows, let's just assume the system cert pool was empty
+		systemCertPool = x509.NewCertPool()
+	}
+
+	systemCertPoolSubjects, err = getCertPoolSubjects(systemCertPool)
+	if err != nil {
+		os.Exit(1)
+	}
+
+	os.Exit(m.Run())
+}
+
+func TestLoadOriginCertPoolJustSystemPool(t *testing.T) {
+	certPoolSubjects := loadCertPoolSubjects(t, nil)
+	extraSubjects := subjectSubtract(systemCertPoolSubjects, certPoolSubjects)
+
+	// Remove extra subjects from the cert pool
+	var filteredSystemCertPoolSubjects []*pkix.Name
+
+	t.Log(extraSubjects)
+
+OUTER:
+	for _, subject := range certPoolSubjects {
+		for _, extraSubject := range extraSubjects {
+			if subject == extraSubject {
+				t.Log(extraSubject)
+				continue OUTER
+			}
+		}
+
+		filteredSystemCertPoolSubjects = append(filteredSystemCertPoolSubjects, subject)
+	}
+
+	assert.Equal(t, len(filteredSystemCertPoolSubjects), len(systemCertPoolSubjects))
+
+	difference := subjectSubtract(systemCertPoolSubjects, filteredSystemCertPoolSubjects)
+	assert.Equal(t, 0, len(difference))
+}
+
+func TestLoadOriginCertPoolCFCertificates(t *testing.T) {
+	certPoolSubjects := loadCertPoolSubjects(t, nil)
+
+	extraSubjects := subjectSubtract(systemCertPoolSubjects, certPoolSubjects)
+
+	expected := []*certificateFixture{
+		{ou: "CloudFlare Origin SSL ECC Certificate Authority"},
+		{ou: "CloudFlare Origin SSL Certificate Authority"},
+		{cn: "origin-pull.cloudflare.net"},
+		{cn: "Argo Tunnel Sample Hello Server Certificate"},
+	}
+
+	assertFixturesMatchSubjects(t, expected, extraSubjects)
+}
+
+func TestLoadOriginCertPoolWithExtraPEMs(t *testing.T) {
+	certPoolWithoutPEMSubjects := loadCertPoolSubjects(t, nil)
+	certPoolWithPEMSubjects := loadCertPoolSubjects(t, samplePEM)
+
+	difference := subjectSubtract(certPoolWithoutPEMSubjects, certPoolWithPEMSubjects)
+
+	assert.Equal(t, 2, len(difference))
+
+	expected := []*certificateFixture{
+		{cn: "Test One"},
+		{cn: "Test Two"},
+	}
+
+	assertFixturesMatchSubjects(t, expected, difference)
+}
+
+func loadCertPoolSubjects(t *testing.T, originCAPoolPEM []byte) []*pkix.Name {
+	certPool, err := loadOriginCertPool(originCAPoolPEM)
+	if isUnrecoverableError(err) {
+		t.Fatal(err)
+	}
+	assert.NotEmpty(t, certPool.Subjects())
+	certPoolSubjects, err := getCertPoolSubjects(certPool)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return certPoolSubjects
+}
+
+func assertFixturesMatchSubjects(t *testing.T, fixtures []*certificateFixture, subjects []*pkix.Name) {
+	assert.Equal(t, len(fixtures), len(subjects))
+
+	for _, fixture := range fixtures {
+		found := false
+		for _, subject := range subjects {
+			found = found || fixtureMatchesSubjectPredicate(fixture, subject)
+		}
+
+		if !found {
+			t.Fail()
+		}
+	}
+}
+
+func fixtureMatchesSubjectPredicate(fixture *certificateFixture, subject *pkix.Name) bool {
+	cnMatch := true
+	if fixture.cn != "" {
+		cnMatch = fixture.cn == subject.CommonName
+	}
+
+	ouMatch := true
+	if fixture.ou != "" {
+		ouMatch = len(subject.OrganizationalUnit) > 0 && fixture.ou == subject.OrganizationalUnit[0]
+	}
+
+	return cnMatch && ouMatch
+}
+
+func subjectSubtract(left []*pkix.Name, right []*pkix.Name) []*pkix.Name {
+	var difference []*pkix.Name
+
+	var found bool
+	for _, r := range right {
+		found = false
+		for _, l := range left {
+			if (*l).String() == (*r).String() {
+				found = true
+			}
+		}
+
+		if !found {
+			difference = append(difference, r)
+		}
+	}
+
+	return difference
+}
+
+func getCertPoolSubjects(certPool *x509.CertPool) ([]*pkix.Name, error) {
+	var subjects []*pkix.Name
+
+	for _, subject := range certPool.Subjects() {
+		var sequence pkix.RDNSequence
+		_, err := asn1.Unmarshal(subject, &sequence)
+		if err != nil {
+			return nil, err
+		}
+
+		name := pkix.Name{}
+		name.FillFromRDNSequence(&sequence)
+
+		subjects = append(subjects, &name)
+	}
+
+	return subjects, nil
+}
+
+func isUnrecoverableError(err error) bool {
+	return err != nil && err.Error() != "crypto/x509: system root pool is not available on Windows"
+}

cmd/cloudflared/tunnel/hello.go

@@ -1,20 +0,0 @@
-package tunnel
-
-import (
-	"fmt"
-
-	"gopkg.in/urfave/cli.v2"
-
-	"github.com/cloudflare/cloudflared/hello"
-)
-
-func helloWorld(c *cli.Context) error {
-	address := fmt.Sprintf(":%d", c.Int("port"))
-	listener, err := hello.CreateTLSListener(address)
-	if err != nil {
-		return err
-	}
-	defer listener.Close()
-	err = hello.StartHelloWorldServer(logger, listener, nil)
-	return err
-}

cmd/cloudflared/tunnel/logger.go

@@ -13,6 +13,9 @@ import (
 	"github.com/pkg/errors"
 )
 
+const debugLevelWarning = "At debug level, request URL, method, protocol, content legnth and header will be logged. " +
+	"Response status, content length and header will also be logged in debug level."
+
 var logger = log.CreateLogger()
 
 func configMainLogger(c *cli.Context) error {
@@ -22,18 +25,21 @@ func configMainLogger(c *cli.Context) error {
 		return errors.Wrap(err, "Unknown logging level specified")
 	}
 	logger.SetLevel(logLevel)
+	if logLevel == logrus.DebugLevel {
+		logger.Warn(debugLevelWarning)
+	}
 	return nil
 }
 
-func configProtoLogger(c *cli.Context) (*logrus.Logger, error) {
-	protoLogLevel, err := logrus.ParseLevel(c.String("proto-loglevel"))
+func configTransportLogger(c *cli.Context) (*logrus.Logger, error) {
+	transportLogLevel, err := logrus.ParseLevel(c.String("transport-loglevel"))
 	if err != nil {
-		logger.WithError(err).Fatal("Unknown protocol logging level specified")
-		return nil, errors.Wrap(err, "Unknown protocol logging level specified")
+		logger.WithError(err).Fatal("Unknown transport logging level specified")
+		return nil, errors.Wrap(err, "Unknown transport logging level specified")
 	}
-	protoLogger := logrus.New()
-	protoLogger.Level = protoLogLevel
-	return protoLogger, nil
+	transportLogger := logrus.New()
+	transportLogger.Level = transportLogLevel
+	return transportLogger, nil
 }
 
 func initLogFile(c *cli.Context, loggers ...*logrus.Logger) error {
@@ -53,6 +59,8 @@ func initLogFile(c *cli.Context, loggers ...*logrus.Logger) error {
 	}
 	defer f.Close()
 	pathMap := lfshook.PathMap{
+		logrus.DebugLevel: filePath,
+		logrus.WarnLevel:  filePath,
 		logrus.InfoLevel:  filePath,
 		logrus.ErrorLevel: filePath,
 		logrus.FatalLevel: filePath,

cmd/cloudflared/tunnel/login.go

@@ -33,7 +33,7 @@ func login(c *cli.Context) error {
 		return err
 	}
 
-	_, err = transfer.Run(c, loginURL, "cert", "callback", callbackStoreURL, path, false)
+	_, err = transfer.Run(loginURL, "cert", "callback", callbackStoreURL, path, false)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "Failed to write the certificate due to the following error:\n%v\n\nYour browser will download the certificate instead. You will have to manually\ncopy it to the following path:\n\n%s\n", err, path)
 		return err
@@ -56,7 +56,7 @@ func checkForExistingCert() (string, bool, error) {
 	if err != nil {
 		return "", false, err
 	}
-	path := filepath.Join(configPath, defaultCredentialFile)
+	path := filepath.Join(configPath, config.DefaultCredentialFile)
 	fileInfo, err := os.Stat(path)
 	if err == nil && fileInfo.Size() > 0 {
 		return path, true, nil

cmd/cloudflared/updater/update.go

@@ -1,6 +1,7 @@
 package updater
 
 import (
+	"context"
 	"os"
 	"runtime"
 	"time"
@@ -14,6 +15,7 @@ import (
 )
 
 const (
+	DefaultCheckUpdateFreq   = time.Hour * 24
 	appID                    = "app_idCzgxYerVD"
 	noUpdateInShellMessage   = "cloudflared will not automatically update when run from the shell. To enable auto-updates, run cloudflared as a service: https://developers.cloudflare.com/argo-tunnel/reference/service/"
 	noUpdateOnWindowsMessage = "cloudflared will not automatically update on Windows systems."
@@ -30,77 +32,146 @@ EKx0BZogHSor9Wy5VztdFaAaVbsJiCbO
 	logger = log.CreateLogger()
 )
 
-type ReleaseInfo struct {
+type UpdateOutcome struct {
 	Updated bool
 	Version string
 	Error   error
 }
 
-func checkForUpdates() ReleaseInfo {
+func (uo *UpdateOutcome) noUpdate() bool {
+	return uo.Error != nil && uo.Updated == false
+}
+
+func checkForUpdateAndApply() UpdateOutcome {
 	var opts equinox.Options
 	if err := opts.SetPublicKeyPEM(publicKey); err != nil {
-		return ReleaseInfo{Error: err}
+		return UpdateOutcome{Error: err}
 	}
 
 	resp, err := equinox.Check(appID, opts)
 	switch {
 	case err == equinox.NotAvailableErr:
-		return ReleaseInfo{}
+		return UpdateOutcome{}
 	case err != nil:
-		return ReleaseInfo{Error: err}
+		return UpdateOutcome{Error: err}
 	}
 
 	err = resp.Apply()
 	if err != nil {
-		return ReleaseInfo{Error: err}
+		return UpdateOutcome{Error: err}
 	}
 
-	return ReleaseInfo{Updated: true, Version: resp.ReleaseVersion}
+	return UpdateOutcome{Updated: true, Version: resp.ReleaseVersion}
 }
 
 func Update(_ *cli.Context) error {
-	if updateApplied() {
-		os.Exit(64)
+	updateOutcome := loggedUpdate()
+	if updateOutcome.Error != nil {
+		os.Exit(10)
 	}
-	return nil
+
+	if updateOutcome.noUpdate() {
+		logger.Infof("cloudflared is up to date (%s)", updateOutcome.Version)
+	}
+
+	return updateOutcome.Error
 }
 
-func Autoupdate(freq time.Duration, listeners *gracenet.Net, shutdownC chan struct{}) error {
-	tickC := time.Tick(freq)
+// Checks for an update and applies it if one is available
+func loggedUpdate() UpdateOutcome {
+	updateOutcome := checkForUpdateAndApply()
+	if updateOutcome.Updated {
+		logger.Infof("cloudflared has been updated to version %s", updateOutcome.Version)
+	}
+	if updateOutcome.Error != nil {
+		logger.WithError(updateOutcome.Error).Error("update check failed")
+	}
+
+	return updateOutcome
+}
+
+// AutoUpdater periodically checks for new version of cloudflared.
+type AutoUpdater struct {
+	configurable     *configurable
+	listeners        *gracenet.Net
+	updateConfigChan chan *configurable
+}
+
+// AutoUpdaterConfigurable is the attributes of AutoUpdater that can be reconfigured during runtime
+type configurable struct {
+	enabled bool
+	freq    time.Duration
+}
+
+func NewAutoUpdater(freq time.Duration, listeners *gracenet.Net) *AutoUpdater {
+	updaterConfigurable := &configurable{
+		enabled: true,
+		freq:    freq,
+	}
+	if freq == 0 {
+		updaterConfigurable.enabled = false
+		updaterConfigurable.freq = DefaultCheckUpdateFreq
+	}
+	return &AutoUpdater{
+		configurable:     updaterConfigurable,
+		listeners:        listeners,
+		updateConfigChan: make(chan *configurable),
+	}
+}
+
+func (a *AutoUpdater) Run(ctx context.Context) error {
+	ticker := time.NewTicker(a.configurable.freq)
 	for {
-		if updateApplied() {
-			os.Args = append(os.Args, "--is-autoupdated=true")
-			pid, err := listeners.StartProcess()
-			if err != nil {
-				logger.WithError(err).Error("Unable to restart server automatically")
-				return err
+		if a.configurable.enabled {
+			updateOutcome := loggedUpdate()
+			if updateOutcome.Updated {
+				os.Args = append(os.Args, "--is-autoupdated=true")
+				pid, err := a.listeners.StartProcess()
+				if err != nil {
+					logger.WithError(err).Error("Unable to restart server automatically")
+					return err
+				}
+				// stop old process after autoupdate. Otherwise we create a new process
+				// after each update
+				logger.Infof("PID of the new process is %d", pid)
+				return nil
 			}
-			// stop old process after autoupdate. Otherwise we create a new process
-			// after each update
-			logger.Infof("PID of the new process is %d", pid)
-			return nil
 		}
 		select {
-		case <-tickC:
-		case <-shutdownC:
-			return nil
+		case <-ctx.Done():
+			return ctx.Err()
+		case newConfigurable := <-a.updateConfigChan:
+			ticker.Stop()
+			a.configurable = newConfigurable
+			ticker = time.NewTicker(a.configurable.freq)
+			// Check if there is new version of cloudflared after receiving new AutoUpdaterConfigurable
+		case <-ticker.C:
 		}
 	}
 }
 
-func updateApplied() bool {
-	releaseInfo := checkForUpdates()
-	if releaseInfo.Updated {
-		logger.Infof("Updated to version %s", releaseInfo.Version)
-		return true
+// Update is the method to pass new AutoUpdaterConfigurable to a running AutoUpdater. It is safe to be called concurrently
+func (a *AutoUpdater) Update(newFreq time.Duration) {
+	newConfigurable := &configurable{
+		enabled: true,
+		freq:    newFreq,
 	}
-	if releaseInfo.Error != nil {
-		logger.WithError(releaseInfo.Error).Error("Update check failed")
+	// A ero duration means autoupdate is disabled
+	if newFreq == 0 {
+		newConfigurable.enabled = false
+		newConfigurable.freq = DefaultCheckUpdateFreq
 	}
-	return false
+	a.updateConfigChan <- newConfigurable
 }
 
 func IsAutoupdateEnabled(c *cli.Context) bool {
+	if !SupportAutoUpdate() {
+		return false
+	}
+	return !c.Bool("no-autoupdate") && c.Duration("autoupdate-freq") != 0
+}
+
+func SupportAutoUpdate() bool {
 	if runtime.GOOS == "windows" {
 		logger.Info(noUpdateOnWindowsMessage)
 		return false
@@ -110,8 +181,7 @@ func IsAutoupdateEnabled(c *cli.Context) bool {
 		logger.Info(noUpdateInShellMessage)
 		return false
 	}
-
-	return !c.Bool("no-autoupdate") && c.Duration("autoupdate-freq") != 0
+	return true
 }
 
 func isRunningFromTerminal() bool {

cmd/cloudflared/updater/update_test.go

@@ -0,0 +1,26 @@
+package updater
+
+import (
+	"context"
+	"testing"
+
+	"github.com/facebookgo/grace/gracenet"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestDisabledAutoUpdater(t *testing.T) {
+	listeners := &gracenet.Net{}
+	autoupdater := NewAutoUpdater(0, listeners)
+	ctx, cancel := context.WithCancel(context.Background())
+	errC := make(chan error)
+	go func() {
+		errC <- autoupdater.Run(ctx)
+	}()
+
+	assert.False(t, autoupdater.configurable.enabled)
+	assert.Equal(t, DefaultCheckUpdateFreq, autoupdater.configurable.freq)
+
+	cancel()
+	// Make sure that autoupdater terminates after canceling the context
+	assert.Equal(t, context.Canceled, <-errC)
+}

cmd/cloudflared/windows_service.go

@@ -8,6 +8,7 @@ package main
 import (
 	"fmt"
 	"os"
+	"syscall"
 	"time"
 	"unsafe"
 
@@ -30,6 +31,10 @@ const (
 	// not defined in golang.org/x/sys/windows package
 	// https://msdn.microsoft.com/en-us/library/windows/desktop/ms681988(v=vs.85).aspx
 	serviceConfigFailureActionsFlag = 4
+
+	// ERROR_FAILED_SERVICE_CONTROLLER_CONNECT
+	// https://docs.microsoft.com/en-us/windows/desktop/debug/system-error-codes--1000-1299-
+	serviceControllerConnectionFailure = 1063
 )
 
 func runApp(app *cli.App, shutdownC, graceShutdownC chan struct{}) {
@@ -50,16 +55,48 @@ func runApp(app *cli.App, shutdownC, graceShutdownC chan struct{}) {
 		},
 	})
 
+	// `IsAnInteractiveSession()` isn't exactly equivalent to "should the
+	// process run as a normal EXE?" There are legitimate non-service cases,
+	// like running cloudflared in a GCP startup script, for which
+	// `IsAnInteractiveSession()` returns false. For more context, see:
+	//     https://github.com/judwhite/go-svc/issues/6
+	// It seems that the "correct way" to check "is this a normal EXE?" is:
+	//     1. attempt to connect to the Service Control Manager
+	//     2. get ERROR_FAILED_SERVICE_CONTROLLER_CONNECT
+	// This involves actually trying to start the service.
+
 	isIntSess, err := svc.IsAnInteractiveSession()
 	if err != nil {
 		logger.Fatalf("failed to determine if we are running in an interactive session: %v", err)
 	}
-
 	if isIntSess {
 		app.Run(os.Args)
 		return
 	}
 
+	// Run executes service name by calling windowsService which is a Handler
+	// interface that implements Execute method.
+	// It will set service status to stop after Execute returns
+	err = svc.Run(windowsServiceName, &windowsService{app: app, shutdownC: shutdownC, graceShutdownC: graceShutdownC})
+	if err != nil {
+		if errno, ok := err.(syscall.Errno); ok && int(errno) == serviceControllerConnectionFailure {
+			// Hack: assume this is a false negative from the IsAnInteractiveSession() check above.
+			// Run the app in "interactive" mode anyway.
+			app.Run(os.Args)
+			return
+		}
+		logger.Fatalf("%s service failed: %v", windowsServiceName, err)
+	}
+}
+
+type windowsService struct {
+	app            *cli.App
+	shutdownC      chan struct{}
+	graceShutdownC chan struct{}
+}
+
+// called by the package code at the start of the service
+func (s *windowsService) Execute(serviceArgs []string, r <-chan svc.ChangeRequest, statusChan chan<- svc.Status) (ssec bool, errno uint32) {
 	elog, err := eventlog.Open(windowsServiceName)
 	if err != nil {
 		logger.WithError(err).Errorf("Cannot open event log for %s", windowsServiceName)
@@ -68,26 +105,23 @@ func runApp(app *cli.App, shutdownC, graceShutdownC chan struct{}) {
 	defer elog.Close()
 
 	elog.Info(1, fmt.Sprintf("%s service starting", windowsServiceName))
-	// Run executes service name by calling windowsService which is a Handler
-	// interface that implements Execute method.
-	// It will set service status to stop after Execute returns
-	err = svc.Run(windowsServiceName, &windowsService{app: app, elog: elog, shutdownC: shutdownC, graceShutdownC: graceShutdownC})
-	if err != nil {
-		elog.Error(1, fmt.Sprintf("%s service failed: %v", windowsServiceName, err))
-		return
+	defer func() {
+		elog.Info(1, fmt.Sprintf("%s service stopped", windowsServiceName))
+	}()
+
+	// the arguments passed here are only meaningful if they were manually
+	// specified by the user, e.g. using the Services console or `sc start`.
+	// https://docs.microsoft.com/en-us/windows/desktop/services/service-entry-point
+	// https://stackoverflow.com/a/6235139
+	var args []string
+	if len(serviceArgs) > 1 {
+		args = serviceArgs
+	} else {
+		// fall back to the arguments from ImagePath (or, as sc calls it, binPath)
+		args = os.Args
 	}
-	elog.Info(1, fmt.Sprintf("%s service stopped", windowsServiceName))
-}
+	elog.Info(1, fmt.Sprintf("%s service arguments: %v", windowsServiceName, args))
 
-type windowsService struct {
-	app            *cli.App
-	elog           *eventlog.Log
-	shutdownC      chan struct{}
-	graceShutdownC chan struct{}
-}
-
-// called by the package code at the start of the service
-func (s *windowsService) Execute(args []string, r <-chan svc.ChangeRequest, statusChan chan<- svc.Status) (ssec bool, errno uint32) {
 	const cmdsAccepted = svc.AcceptStop | svc.AcceptShutdown
 	statusChan <- svc.Status{State: svc.StartPending}
 	errC := make(chan error)
@@ -101,26 +135,23 @@ func (s *windowsService) Execute(args []string, r <-chan svc.ChangeRequest, stat
 		case c := <-r:
 			switch c.Cmd {
 			case svc.Interrogate:
-				s.elog.Info(1, fmt.Sprintf("control request 1 #%d", c))
 				statusChan <- c.CurrentStatus
 			case svc.Stop:
-				s.elog.Info(1, "received stop control request")
 				close(s.graceShutdownC)
 				statusChan <- svc.Status{State: svc.StopPending}
 			case svc.Shutdown:
-				s.elog.Info(1, "received shutdown control request")
 				close(s.shutdownC)
 				statusChan <- svc.Status{State: svc.StopPending}
 			default:
-				s.elog.Error(1, fmt.Sprintf("unexpected control request #%d", c))
+				elog.Error(1, fmt.Sprintf("unexpected control request #%d", c))
 			}
 		case err := <-errC:
 			ssec = true
 			if err != nil {
-				s.elog.Error(1, fmt.Sprintf("cloudflared terminated with error %v", err))
+				elog.Error(1, fmt.Sprintf("cloudflared terminated with error %v", err))
 				errno = 1
 			} else {
-				s.elog.Info(1, "cloudflared terminated without error")
+				elog.Info(1, "cloudflared terminated without error")
 				errno = 0
 			}
 			return

cmd/sqlgateway/sqlgateway.go

@@ -1,148 +0,0 @@
-package sqlgateway
-
-import (
-	"database/sql"
-	"encoding/json"
-	"fmt"
-	"math/rand"
-	"net/http"
-	"strings"
-	"time"
-
-	_ "github.com/lib/pq"
-	cli "gopkg.in/urfave/cli.v2"
-
-	"github.com/elgs/gosqljson"
-
-	"github.com/gorilla/mux"
-	"github.com/sirupsen/logrus"
-)
-
-type Message struct {
-	Connection Connection    `json:"connection"`
-	Command    string        `json:"command"`
-	Params     []interface{} `json:"params"`
-}
-
-type Connection struct {
-	SSLMode string `json:"sslmode"`
-	Token   string `json:"token"`
-}
-
-type Response struct {
-	Columns []string   `json:"columns"`
-	Rows    [][]string `json:"rows"`
-	Error   string     `json:"error"`
-}
-
-type Proxy struct {
-	Context  *cli.Context
-	Router   *mux.Router
-	Token    string
-	User     string
-	Password string
-	Driver   string
-	Database string
-	Logger   *logrus.Logger
-}
-
-func StartProxy(c *cli.Context, logger *logrus.Logger, password string) error {
-	proxy := NewProxy(c, logger, password)
-
-	logger.Infof("Starting SQL Gateway Proxy on port %s", strings.Split(c.String("url"), ":")[1])
-
-	err := http.ListenAndServe(":"+strings.Split(c.String("url"), ":")[1], proxy.Router)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func randID(n int, c *cli.Context) string {
-	charBytes := []byte("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890")
-	b := make([]byte, n)
-	for i := range b {
-		b[i] = charBytes[rand.Intn(len(charBytes))]
-	}
-	return fmt.Sprintf("%s&%s", c.String("hostname"), b)
-}
-
-// db://user@dbname
-func parseInfo(input string) (string, string, string) {
-	p1 := strings.Split(input, "://")
-	p2 := strings.Split(p1[1], "@")
-	return p1[0], p2[0], p2[1]
-}
-
-func NewProxy(c *cli.Context, logger *logrus.Logger, pass string) *Proxy {
-	rand.Seed(time.Now().UnixNano())
-	driver, user, dbname := parseInfo(c.String("address"))
-	proxy := Proxy{
-		Context:  c,
-		Router:   mux.NewRouter(),
-		Token:    randID(64, c),
-		Logger:   logger,
-		User:     user,
-		Password: pass,
-		Database: dbname,
-		Driver:   driver,
-	}
-
-	logger.Info(fmt.Sprintf(`
-
-	--------------------
-	SQL Gateway Proxy
-	Token: %s
-	--------------------
-
-	`, proxy.Token))
-
-	proxy.Router.HandleFunc("/", proxy.proxyRequest).Methods("POST")
-	return &proxy
-}
-
-func (proxy *Proxy) proxyRequest(rw http.ResponseWriter, req *http.Request) {
-	var message Message
-	response := Response{}
-
-	err := json.NewDecoder(req.Body).Decode(&message)
-	if err != nil {
-		proxy.Logger.Error(err)
-		http.Error(rw, fmt.Sprintf("400 - %s", err.Error()), http.StatusBadRequest)
-		return
-	}
-
-	if message.Connection.Token != proxy.Token {
-		proxy.Logger.Error("Invalid token")
-		http.Error(rw, "400 - Invalid token", http.StatusBadRequest)
-		return
-	}
-
-	connStr := fmt.Sprintf("user=%s password=%s dbname=%s sslmode=%s", proxy.User, proxy.Password, proxy.Database, message.Connection.SSLMode)
-
-	db, err := sql.Open(proxy.Driver, connStr)
-	defer db.Close()
-
-	if err != nil {
-		proxy.Logger.Error(err)
-		http.Error(rw, fmt.Sprintf("400 - %s", err.Error()), http.StatusBadRequest)
-		return
-
-	} else {
-		proxy.Logger.Info("Forwarding SQL: ", message.Command)
-		rw.Header().Set("Content-Type", "application/json")
-
-		headers, data, err := gosqljson.QueryDbToArray(db, "lower", message.Command, message.Params...)
-
-		if err != nil {
-			proxy.Logger.Error(err)
-			http.Error(rw, fmt.Sprintf("400 - %s", err.Error()), http.StatusBadRequest)
-			return
-
-		} else {
-			response = Response{headers, data, ""}
-		}
-	}
-	json.NewEncoder(rw).Encode(response)
-}

connection/connection.go

@@ -0,0 +1,81 @@
+package connection
+
+import (
+	"context"
+	"net"
+	"time"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/tunnelrpc"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	"github.com/google/uuid"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+
+	rpc "zombiezen.com/go/capnproto2/rpc"
+)
+
+const (
+	openStreamTimeout = 30 * time.Second
+)
+
+type dialError struct {
+	cause error
+}
+
+func (e dialError) Error() string {
+	return e.cause.Error()
+}
+
+type Connection struct {
+	id    uuid.UUID
+	muxer *h2mux.Muxer
+}
+
+func newConnection(muxer *h2mux.Muxer, edgeIP *net.TCPAddr) (*Connection, error) {
+	id, err := uuid.NewRandom()
+	if err != nil {
+		return nil, err
+	}
+	return &Connection{
+		id:    id,
+		muxer: muxer,
+	}, nil
+}
+
+func (c *Connection) Serve(ctx context.Context) error {
+	// Serve doesn't return until h2mux is shutdown
+	return c.muxer.Serve(ctx)
+}
+
+// Connect is used to establish connections with cloudflare's edge network
+func (c *Connection) Connect(ctx context.Context, parameters *tunnelpogs.ConnectParameters, logger *logrus.Entry) (*pogs.ConnectResult, error) {
+	openStreamCtx, cancel := context.WithTimeout(ctx, openStreamTimeout)
+	defer cancel()
+
+	rpcConn, err := c.newRPConn(openStreamCtx, logger)
+	if err != nil {
+		return nil, errors.Wrap(err, "cannot create new RPC connection")
+	}
+	defer rpcConn.Close()
+
+	tsClient := tunnelpogs.TunnelServer_PogsClient{Client: rpcConn.Bootstrap(ctx)}
+
+	return tsClient.Connect(ctx, parameters)
+}
+
+func (c *Connection) Shutdown() {
+	c.muxer.Shutdown()
+}
+
+func (c *Connection) newRPConn(ctx context.Context, logger *logrus.Entry) (*rpc.Conn, error) {
+	stream, err := c.muxer.OpenRPCStream(ctx)
+	if err != nil {
+		return nil, err
+	}
+	return rpc.NewConn(
+		tunnelrpc.NewTransportLogger(logger.WithField("rpc", "connect"), rpc.StreamTransport(stream)),
+		tunnelrpc.ConnLog(logger.WithField("rpc", "connect")),
+	), nil
+}

connection/discovery.go

@@ -0,0 +1,254 @@
+package connection
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+)
+
+const (
+	// Used to discover HA Warp servers
+	srvService = "warp"
+	srvProto   = "tcp"
+	srvName    = "cloudflarewarp.com"
+
+	// Used to fallback to DoT when we can't use the default resolver to
+	// discover HA Warp servers (GitHub issue #75).
+	dotServerName = "cloudflare-dns.com"
+	dotServerAddr = "1.1.1.1:853"
+	dotTimeout    = time.Duration(15 * time.Second)
+
+	// SRV record resolution TTL
+	resolveEdgeAddrTTL = 1 * time.Hour
+)
+
+var friendlyDNSErrorLines = []string{
+	`Please try the following things to diagnose this issue:`,
+	`  1. ensure that cloudflarewarp.com is returning "warp" service records.`,
+	`     Run your system's equivalent of: dig srv _warp._tcp.cloudflarewarp.com`,
+	`  2. ensure that your DNS resolver is not returning compressed SRV records.`,
+	`     See GitHub issue https://github.com/golang/go/issues/27546`,
+	`     For example, you could use Cloudflare's 1.1.1.1 as your resolver:`,
+	`     https://developers.cloudflare.com/1.1.1.1/setting-up-1.1.1.1/`,
+}
+
+// EdgeServiceDiscoverer is an interface for looking up Cloudflare's edge network addresses
+type EdgeServiceDiscoverer interface {
+	// Addr returns an address to connect to cloudflare's edge network
+	Addr() *net.TCPAddr
+	// AvailableAddrs returns the number of unique addresses
+	AvailableAddrs() uint8
+	// Refresh rediscover Cloudflare's edge network addresses
+	Refresh() error
+}
+
+// EdgeAddrResolver discovers the addresses of Cloudflare's edge network through SRV record.
+// It implements EdgeServiceDiscoverer interface
+type EdgeAddrResolver struct {
+	sync.Mutex
+	// Addrs to connect to cloudflare's edge network
+	addrs []*net.TCPAddr
+	// index of the next element to use in addrs
+	nextAddrIndex int
+	logger        *logrus.Entry
+}
+
+func NewEdgeAddrResolver(logger *logrus.Logger) (EdgeServiceDiscoverer, error) {
+	r := &EdgeAddrResolver{
+		logger: logger.WithField("subsystem", " edgeAddrResolver"),
+	}
+	if err := r.Refresh(); err != nil {
+		return nil, err
+	}
+	return r, nil
+}
+
+func (r *EdgeAddrResolver) Addr() *net.TCPAddr {
+	r.Lock()
+	defer r.Unlock()
+	addr := r.addrs[r.nextAddrIndex]
+	r.nextAddrIndex = (r.nextAddrIndex + 1) % len(r.addrs)
+	return addr
+}
+
+func (r *EdgeAddrResolver) AvailableAddrs() uint8 {
+	r.Lock()
+	defer r.Unlock()
+	return uint8(len(r.addrs))
+}
+
+func (r *EdgeAddrResolver) Refresh() error {
+	newAddrs, err := EdgeDiscovery(r.logger)
+	if err != nil {
+		return err
+	}
+	r.Lock()
+	defer r.Unlock()
+	r.addrs = newAddrs
+	r.nextAddrIndex = 0
+	return nil
+}
+
+// HA service discovery lookup
+func EdgeDiscovery(logger *logrus.Entry) ([]*net.TCPAddr, error) {
+	_, addrs, err := net.LookupSRV(srvService, srvProto, srvName)
+	if err != nil {
+		// Try to fall back to DoT from Cloudflare directly.
+		//
+		// Note: Instead of DoT, we could also have used DoH. Either of these:
+		//     - directly via the JSON API (https://1.1.1.1/dns-query?ct=application/dns-json&name=_warp._tcp.cloudflarewarp.com&type=srv)
+		//     - indirectly via `tunneldns.NewUpstreamHTTPS()`
+		// But both of these cases miss out on a key feature from the stdlib:
+		//     "The returned records are sorted by priority and randomized by weight within a priority."
+		//     (https://golang.org/pkg/net/#Resolver.LookupSRV)
+		// Does this matter? I don't know. It may someday. Let's use DoT so we don't need to worry about it.
+		// See also: Go feature request for stdlib-supported DoH: https://github.com/golang/go/issues/27552
+		r := fallbackResolver(dotServerName, dotServerAddr)
+		ctx, cancel := context.WithTimeout(context.Background(), dotTimeout)
+		defer cancel()
+		_, fallbackAddrs, fallbackErr := r.LookupSRV(ctx, srvService, srvProto, srvName)
+		if fallbackErr != nil || len(fallbackAddrs) == 0 {
+			// use the original DNS error `err` in messages, not `fallbackErr`
+			logger.Errorln("Error looking up Cloudflare edge IPs: the DNS query failed:", err)
+			for _, s := range friendlyDNSErrorLines {
+				logger.Errorln(s)
+			}
+			return nil, errors.Wrap(err, "Could not lookup srv records on _warp._tcp.cloudflarewarp.com")
+		}
+		// Accept the fallback results and keep going
+		addrs = fallbackAddrs
+	}
+	var resolvedIPsPerCNAME [][]*net.TCPAddr
+	var lookupErr error
+	for _, addr := range addrs {
+		ips, err := resolveSRVToTCP(addr)
+		if err != nil || len(ips) == 0 {
+			// don't return early, we might be able to resolve other addresses
+			lookupErr = err
+			continue
+		}
+		resolvedIPsPerCNAME = append(resolvedIPsPerCNAME, ips)
+	}
+	ips := flattenServiceIPs(resolvedIPsPerCNAME)
+	if lookupErr == nil && len(ips) == 0 {
+		return nil, fmt.Errorf("Unknown service discovery error")
+	}
+	return ips, lookupErr
+}
+
+func resolveSRVToTCP(srv *net.SRV) ([]*net.TCPAddr, error) {
+	ips, err := net.LookupIP(srv.Target)
+	if err != nil {
+		return nil, err
+	}
+	addrs := make([]*net.TCPAddr, len(ips))
+	for i, ip := range ips {
+		addrs[i] = &net.TCPAddr{IP: ip, Port: int(srv.Port)}
+	}
+	return addrs, nil
+}
+
+// FlattenServiceIPs transposes and flattens the input slices such that the
+// first element of the n inner slices are the first n elements of the result.
+func flattenServiceIPs(ipsByService [][]*net.TCPAddr) []*net.TCPAddr {
+	var result []*net.TCPAddr
+	for len(ipsByService) > 0 {
+		filtered := ipsByService[:0]
+		for _, ips := range ipsByService {
+			if len(ips) == 0 {
+				// sanity check
+				continue
+			}
+			result = append(result, ips[0])
+			if len(ips) > 1 {
+				filtered = append(filtered, ips[1:])
+			}
+		}
+		ipsByService = filtered
+	}
+	return result
+}
+
+// Inspiration: https://github.com/artyom/dot/blob/master/dot.go
+func fallbackResolver(serverName, serverAddress string) *net.Resolver {
+	return &net.Resolver{
+		PreferGo: true,
+		Dial: func(ctx context.Context, _ string, _ string) (net.Conn, error) {
+			var dialer net.Dialer
+			conn, err := dialer.DialContext(ctx, "tcp", serverAddress)
+			if err != nil {
+				return nil, err
+			}
+			tlsConfig := &tls.Config{ServerName: serverName}
+			return tls.Client(conn, tlsConfig), nil
+		},
+	}
+}
+
+// EdgeHostnameResolver discovers the addresses of Cloudflare's edge network via a list of server hostnames.
+// It implements EdgeServiceDiscoverer interface, and is used mainly for testing connectivity.
+type EdgeHostnameResolver struct {
+	sync.Mutex
+	// hostnames of edge servers
+	hostnames []string
+	// Addrs to connect to cloudflare's edge network
+	addrs []*net.TCPAddr
+	// index of the next element to use in addrs
+	nextAddrIndex int
+}
+
+func NewEdgeHostnameResolver(edgeHostnames []string) (EdgeServiceDiscoverer, error) {
+	r := &EdgeHostnameResolver{
+		hostnames: edgeHostnames,
+	}
+	if err := r.Refresh(); err != nil {
+		return nil, err
+	}
+	return r, nil
+}
+
+func (r *EdgeHostnameResolver) Addr() *net.TCPAddr {
+	r.Lock()
+	defer r.Unlock()
+	addr := r.addrs[r.nextAddrIndex]
+	r.nextAddrIndex = (r.nextAddrIndex + 1) % len(r.addrs)
+	return addr
+}
+
+func (r *EdgeHostnameResolver) AvailableAddrs() uint8 {
+	r.Lock()
+	defer r.Unlock()
+	return uint8(len(r.addrs))
+}
+
+func (r *EdgeHostnameResolver) Refresh() error {
+	newAddrs, err := ResolveAddrs(r.hostnames)
+	if err != nil {
+		return err
+	}
+	r.Lock()
+	defer r.Unlock()
+	r.addrs = newAddrs
+	r.nextAddrIndex = 0
+	return nil
+}
+
+// Resolve TCP address given a list of addresses. Address can be a hostname, however, it will return at most one
+// of the hostname's IP addresses
+func ResolveAddrs(addrs []string) ([]*net.TCPAddr, error) {
+	var tcpAddrs []*net.TCPAddr
+	for _, addr := range addrs {
+		tcpAddr, err := net.ResolveTCPAddr("tcp", addr)
+		if err != nil {
+			return nil, err
+		}
+		tcpAddrs = append(tcpAddrs, tcpAddr)
+	}
+	return tcpAddrs, nil
+}

connection/discovery_test.go

@@ -1,4 +1,4 @@
-package origin
+package connection
 
 import (
 	"net"
@@ -7,8 +7,26 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+type mockEdgeServiceDiscoverer struct {
+}
+
+func (mr *mockEdgeServiceDiscoverer) Addr() *net.TCPAddr {
+	return &net.TCPAddr{
+		IP:   net.ParseIP("127.0.0.1"),
+		Port: 63102,
+	}
+}
+
+func (mr *mockEdgeServiceDiscoverer) AvailableAddrs() uint8 {
+	return 1
+}
+
+func (mr *mockEdgeServiceDiscoverer) Refresh() error {
+	return nil
+}
+
 func TestFlattenServiceIPs(t *testing.T) {
-	result := FlattenServiceIPs([][]*net.TCPAddr{
+	result := flattenServiceIPs([][]*net.TCPAddr{
 		[]*net.TCPAddr{
 			&net.TCPAddr{Port: 1},
 			&net.TCPAddr{Port: 2},

connection/manager.go

@@ -0,0 +1,284 @@
+package connection
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	"github.com/google/uuid"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+)
+
+const (
+	quickStartLink = "https://developers.cloudflare.com/argo-tunnel/quickstart/"
+	faqLink        = "https://developers.cloudflare.com/argo-tunnel/faq/"
+)
+
+// EdgeManager manages connections with the edge
+type EdgeManager struct {
+	// streamHandler handles stream opened by the edge
+	streamHandler h2mux.MuxedStreamHandler
+	// TLSConfig is the TLS configuration to connect with edge
+	tlsConfig *tls.Config
+	// cloudflaredConfig is the cloudflared configuration that is determined when the process first starts
+	cloudflaredConfig *CloudflaredConfig
+	// serviceDiscoverer returns the next edge addr to connect to
+	serviceDiscoverer EdgeServiceDiscoverer
+	// state is attributes of ConnectionManager that can change during runtime.
+	state *edgeManagerState
+
+	logger *logrus.Entry
+}
+
+// EdgeConnectionManagerConfigurable is the configurable attributes of a EdgeConnectionManager
+type EdgeManagerConfigurable struct {
+	TunnelHostnames []h2mux.TunnelHostname
+	*pogs.EdgeConnectionConfig
+}
+
+type CloudflaredConfig struct {
+	CloudflaredID uuid.UUID
+	Tags          []pogs.Tag
+	BuildInfo     *buildinfo.BuildInfo
+	Scope         pogs.Scope
+}
+
+func NewEdgeManager(
+	streamHandler h2mux.MuxedStreamHandler,
+	edgeConnMgrConfigurable *EdgeManagerConfigurable,
+	userCredential []byte,
+	tlsConfig *tls.Config,
+	serviceDiscoverer EdgeServiceDiscoverer,
+	cloudflaredConfig *CloudflaredConfig,
+	logger *logrus.Logger,
+) *EdgeManager {
+	return &EdgeManager{
+		streamHandler:     streamHandler,
+		tlsConfig:         tlsConfig,
+		cloudflaredConfig: cloudflaredConfig,
+		serviceDiscoverer: serviceDiscoverer,
+		state:             newEdgeConnectionManagerState(edgeConnMgrConfigurable, userCredential),
+		logger:            logger.WithField("subsystem", "connectionManager"),
+	}
+}
+
+func (em *EdgeManager) Run(ctx context.Context) error {
+	defer em.shutdown()
+
+	resolveEdgeIPTicker := time.Tick(resolveEdgeAddrTTL)
+	for {
+		select {
+		case <-ctx.Done():
+			return errors.Wrap(ctx.Err(), "EdgeConnectionManager terminated")
+		case <-resolveEdgeIPTicker:
+			if err := em.serviceDiscoverer.Refresh(); err != nil {
+				em.logger.WithError(err).Warn("Cannot refresh Cloudflare edge addresses")
+			}
+		default:
+			time.Sleep(1 * time.Second)
+		}
+		// Create/delete connection one at a time, so we don't need to adjust for connections that are being created/deleted
+		// in shouldCreateConnection or shouldReduceConnection calculation
+		if em.state.shouldCreateConnection(em.serviceDiscoverer.AvailableAddrs()) {
+			if err := em.newConnection(ctx); err != nil {
+				em.logger.WithError(err).Error("cannot create new connection")
+			}
+		} else if em.state.shouldReduceConnection() {
+			if err := em.closeConnection(ctx); err != nil {
+				em.logger.WithError(err).Error("cannot close connection")
+			}
+		}
+	}
+}
+
+func (em *EdgeManager) UpdateConfigurable(newConfigurable *EdgeManagerConfigurable) {
+	em.logger.Infof("New edge connection manager configuration %+v", newConfigurable)
+	em.state.updateConfigurable(newConfigurable)
+}
+
+func (em *EdgeManager) newConnection(ctx context.Context) error {
+	edgeIP := em.serviceDiscoverer.Addr()
+	edgeConn, err := em.dialEdge(ctx, edgeIP)
+	if err != nil {
+		return errors.Wrap(err, "dial edge error")
+	}
+	configurable := em.state.getConfigurable()
+	// Establish a muxed connection with the edge
+	// Client mux handshake with agent server
+	muxer, err := h2mux.Handshake(edgeConn, edgeConn, h2mux.MuxerConfig{
+		Timeout:           configurable.Timeout,
+		Handler:           em.streamHandler,
+		IsClient:          true,
+		HeartbeatInterval: configurable.HeartbeatInterval,
+		MaxHeartbeats:     configurable.MaxFailedHeartbeats,
+		Logger:            em.logger.WithField("subsystem", "muxer"),
+	})
+	if err != nil {
+		return errors.Wrap(err, "couldn't perform handshake with edge")
+	}
+
+	h2muxConn, err := newConnection(muxer, edgeIP)
+	if err != nil {
+		return errors.Wrap(err, "couldn't create h2mux connection")
+	}
+
+	go em.serveConn(ctx, h2muxConn)
+
+	connResult, err := h2muxConn.Connect(ctx, &pogs.ConnectParameters{
+		CloudflaredID:       em.cloudflaredConfig.CloudflaredID,
+		CloudflaredVersion:  em.cloudflaredConfig.BuildInfo.CloudflaredVersion,
+		NumPreviousAttempts: 0,
+		OriginCert:          em.state.getUserCredential(),
+		Scope:               em.cloudflaredConfig.Scope,
+		Tags:                em.cloudflaredConfig.Tags,
+	}, em.logger)
+	if err != nil {
+		h2muxConn.Shutdown()
+		return errors.Wrap(err, "couldn't connect to edge")
+	}
+
+	if connErr := connResult.Err; connErr != nil {
+		if !connErr.ShouldRetry {
+			return errors.Wrap(connErr, em.noRetryMessage())
+		}
+		return errors.Wrapf(connErr, "edge responded with RetryAfter=%v", connErr.RetryAfter)
+	}
+
+	em.state.newConnection(h2muxConn)
+	em.logger.Infof("connected to %s", connResult.ServerInfo.LocationName)
+	return nil
+}
+
+func (em *EdgeManager) closeConnection(ctx context.Context) error {
+	conn := em.state.getFirstConnection()
+	if conn == nil {
+		return fmt.Errorf("no connection to close")
+	}
+	conn.Shutdown()
+	return nil
+}
+
+func (em *EdgeManager) serveConn(ctx context.Context, conn *Connection) {
+	err := conn.Serve(ctx)
+	em.logger.WithError(err).Warn("Connection closed")
+	em.state.closeConnection(conn)
+}
+
+func (em *EdgeManager) dialEdge(ctx context.Context, edgeIP *net.TCPAddr) (*tls.Conn, error) {
+	timeout := em.state.getConfigurable().Timeout
+	// Inherit from parent context so we can cancel (Ctrl-C) while dialing
+	dialCtx, dialCancel := context.WithTimeout(ctx, timeout)
+	defer dialCancel()
+
+	dialer := net.Dialer{DualStack: true}
+	edgeConn, err := dialer.DialContext(dialCtx, "tcp", edgeIP.String())
+	if err != nil {
+		return nil, dialError{cause: errors.Wrap(err, "DialContext error")}
+	}
+	tlsEdgeConn := tls.Client(edgeConn, em.tlsConfig)
+	tlsEdgeConn.SetDeadline(time.Now().Add(timeout))
+
+	if err = tlsEdgeConn.Handshake(); err != nil {
+		return nil, dialError{cause: errors.Wrap(err, "Handshake with edge error")}
+	}
+	// clear the deadline on the conn; h2mux has its own timeouts
+	tlsEdgeConn.SetDeadline(time.Time{})
+	return tlsEdgeConn, nil
+}
+
+func (em *EdgeManager) noRetryMessage() string {
+	messageTemplate := "cloudflared could not register an Argo Tunnel on your account. Please confirm the following before trying again:" +
+		"1. You have Argo Smart Routing enabled in your account, See Enable Argo section of %s." +
+		"2. Your credential at %s is still valid. See %s."
+	return fmt.Sprintf(messageTemplate, quickStartLink, em.state.getConfigurable().UserCredentialPath, faqLink)
+}
+
+func (em *EdgeManager) shutdown() {
+	em.state.shutdown()
+}
+
+type edgeManagerState struct {
+	sync.RWMutex
+	configurable   *EdgeManagerConfigurable
+	userCredential []byte
+	conns          map[uuid.UUID]*Connection
+}
+
+func newEdgeConnectionManagerState(configurable *EdgeManagerConfigurable, userCredential []byte) *edgeManagerState {
+	return &edgeManagerState{
+		configurable:   configurable,
+		userCredential: userCredential,
+		conns:          make(map[uuid.UUID]*Connection),
+	}
+}
+
+func (ems *edgeManagerState) shouldCreateConnection(availableEdgeAddrs uint8) bool {
+	ems.RLock()
+	defer ems.RUnlock()
+	expectedHAConns := ems.configurable.NumHAConnections
+	if availableEdgeAddrs < expectedHAConns {
+		expectedHAConns = availableEdgeAddrs
+	}
+	return uint8(len(ems.conns)) < expectedHAConns
+}
+
+func (ems *edgeManagerState) shouldReduceConnection() bool {
+	ems.RLock()
+	defer ems.RUnlock()
+	return uint8(len(ems.conns)) > ems.configurable.NumHAConnections
+}
+
+func (ems *edgeManagerState) newConnection(conn *Connection) {
+	ems.Lock()
+	defer ems.Unlock()
+	ems.conns[conn.id] = conn
+}
+
+func (ems *edgeManagerState) closeConnection(conn *Connection) {
+	ems.Lock()
+	defer ems.Unlock()
+	delete(ems.conns, conn.id)
+}
+
+func (ems *edgeManagerState) getFirstConnection() *Connection {
+	ems.RLock()
+	defer ems.RUnlock()
+
+	for _, conn := range ems.conns {
+		return conn
+	}
+	return nil
+}
+
+func (ems *edgeManagerState) shutdown() {
+	ems.Lock()
+	defer ems.Unlock()
+	for _, conn := range ems.conns {
+		conn.Shutdown()
+	}
+}
+
+func (ems *edgeManagerState) getConfigurable() *EdgeManagerConfigurable {
+	ems.Lock()
+	defer ems.Unlock()
+	return ems.configurable
+}
+
+func (ems *edgeManagerState) updateConfigurable(newConfigurable *EdgeManagerConfigurable) {
+	ems.Lock()
+	defer ems.Unlock()
+	ems.configurable = newConfigurable
+}
+
+func (ems *edgeManagerState) getUserCredential() []byte {
+	ems.RLock()
+	defer ems.RUnlock()
+	return ems.userCredential
+}

connection/manager_test.go

@@ -0,0 +1,77 @@
+package connection
+
+import (
+	"testing"
+	"time"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	"github.com/google/uuid"
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	configurable = &EdgeManagerConfigurable{
+		[]h2mux.TunnelHostname{
+			"http.example.com",
+			"ws.example.com",
+			"hello.example.com",
+		},
+		&pogs.EdgeConnectionConfig{
+			NumHAConnections:    1,
+			HeartbeatInterval:   1 * time.Second,
+			Timeout:             5 * time.Second,
+			MaxFailedHeartbeats: 3,
+			UserCredentialPath:  "/etc/cloudflared/cert.pem",
+		},
+	}
+	cloudflaredConfig = &CloudflaredConfig{
+		CloudflaredID: uuid.New(),
+		Tags: []pogs.Tag{
+			{Name: "pool", Value: "east-6"},
+		},
+		BuildInfo: &buildinfo.BuildInfo{
+			GoOS:               "linux",
+			GoVersion:          "1.12",
+			GoArch:             "amd64",
+			CloudflaredVersion: "2019.6.0",
+		},
+	}
+)
+
+type mockStreamHandler struct {
+}
+
+func (msh *mockStreamHandler) ServeStream(*h2mux.MuxedStream) error {
+	return nil
+}
+
+func mockEdgeManager() *EdgeManager {
+	return NewEdgeManager(
+		&mockStreamHandler{},
+		configurable,
+		[]byte{},
+		nil,
+		&mockEdgeServiceDiscoverer{},
+		cloudflaredConfig,
+		logrus.New(),
+	)
+}
+
+func TestUpdateConfigurable(t *testing.T) {
+	m := mockEdgeManager()
+	newConfigurable := &EdgeManagerConfigurable{
+		[]h2mux.TunnelHostname{
+			"second.example.com",
+		},
+		&pogs.EdgeConnectionConfig{
+			NumHAConnections: 2,
+		},
+	}
+	m.UpdateConfigurable(newConfigurable)
+
+	assert.Equal(t, newConfigurable, m.state.getConfigurable())
+}

dbconnect/client.go

@@ -0,0 +1,145 @@
+package dbconnect
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"strings"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
+
+// Client is an interface to talk to any database.
+//
+// Currently, the only implementation is SQLClient, but its structure
+// should be designed to handle a MongoClient or RedisClient in the future.
+type Client interface {
+	Ping(context.Context) error
+	Submit(context.Context, *Command) (interface{}, error)
+}
+
+// NewClient creates a database client based on its URL scheme.
+func NewClient(ctx context.Context, originURL *url.URL) (Client, error) {
+	return NewSQLClient(ctx, originURL)
+}
+
+// Command is a standard, non-vendor format for submitting database commands.
+//
+// When determining the scope of this struct, refer to the following litmus test:
+// Could this (roughly) conform to SQL, Document-based, and Key-value command formats?
+type Command struct {
+	Statement string        `json:"statement"`
+	Arguments Arguments     `json:"arguments,omitempty"`
+	Mode      string        `json:"mode,omitempty"`
+	Isolation string        `json:"isolation,omitempty"`
+	Timeout   time.Duration `json:"timeout,omitempty"`
+}
+
+// Validate enforces the contract of Command: non empty statement (both in length and logic),
+// lowercase mode and isolation, non-zero timeout, and valid Arguments.
+func (cmd *Command) Validate() error {
+	if cmd.Statement == "" {
+		return fmt.Errorf("cannot provide an empty statement")
+	}
+
+	if strings.Map(func(char rune) rune {
+		if char == ';' || unicode.IsSpace(char) {
+			return -1
+		}
+		return char
+	}, cmd.Statement) == "" {
+		return fmt.Errorf("cannot provide a statement with no logic: '%s'", cmd.Statement)
+	}
+
+	cmd.Mode = strings.ToLower(cmd.Mode)
+	cmd.Isolation = strings.ToLower(cmd.Isolation)
+
+	if cmd.Timeout.Nanoseconds() <= 0 {
+		cmd.Timeout = 24 * time.Hour
+	}
+
+	return cmd.Arguments.Validate()
+}
+
+// UnmarshalJSON converts a byte representation of JSON into a Command, which is also validated.
+func (cmd *Command) UnmarshalJSON(data []byte) error {
+	// Alias is required to avoid infinite recursion from the default UnmarshalJSON.
+	type Alias Command
+	alias := &struct {
+		*Alias
+	}{
+		Alias: (*Alias)(cmd),
+	}
+
+	err := json.Unmarshal(data, &alias)
+	if err == nil {
+		err = cmd.Validate()
+	}
+
+	return err
+}
+
+// Arguments is a wrapper for either map-based or array-based Command arguments.
+//
+// Each field is mutually-exclusive and some Client implementations may not
+// support both fields (eg. MySQL does not accept named arguments).
+type Arguments struct {
+	Named      map[string]interface{}
+	Positional []interface{}
+}
+
+// Validate enforces the contract of Arguments: non nil, mutually exclusive, and no empty or reserved keys.
+func (args *Arguments) Validate() error {
+	if args.Named == nil {
+		args.Named = map[string]interface{}{}
+	}
+	if args.Positional == nil {
+		args.Positional = []interface{}{}
+	}
+
+	if len(args.Named) > 0 && len(args.Positional) > 0 {
+		return fmt.Errorf("both named and positional arguments cannot be specified: %+v and %+v", args.Named, args.Positional)
+	}
+
+	for key := range args.Named {
+		if key == "" {
+			return fmt.Errorf("named arguments cannot contain an empty key: %+v", args.Named)
+		}
+		if !utf8.ValidString(key) {
+			return fmt.Errorf("named argument does not conform to UTF-8 encoding: %s", key)
+		}
+		if strings.HasPrefix(key, "_") {
+			return fmt.Errorf("named argument cannot start with a reserved keyword '_': %s", key)
+		}
+		if unicode.IsNumber([]rune(key)[0]) {
+			return fmt.Errorf("named argument cannot start with a number: %s", key)
+		}
+	}
+
+	return nil
+}
+
+// UnmarshalJSON converts a byte representation of JSON into Arguments, which is also validated.
+func (args *Arguments) UnmarshalJSON(data []byte) error {
+	var obj interface{}
+	err := json.Unmarshal(data, &obj)
+	if err != nil {
+		return err
+	}
+
+	named, ok := obj.(map[string]interface{})
+	if ok {
+		args.Named = named
+	} else {
+		positional, ok := obj.([]interface{})
+		if ok {
+			args.Positional = positional
+		} else {
+			return fmt.Errorf("arguments must either be an object {\"0\":\"val\"} or an array [\"val\"]: %s", string(data))
+		}
+	}
+
+	return args.Validate()
+}

dbconnect/client_test.go

@@ -0,0 +1,183 @@
+package dbconnect
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCommandValidateEmpty(t *testing.T) {
+	stmts := []string{
+		"",
+		";",
+		" \n\t",
+		";\n;\t;",
+	}
+
+	for _, stmt := range stmts {
+		cmd := Command{Statement: stmt}
+
+		assert.Error(t, cmd.Validate(), stmt)
+	}
+}
+
+func TestCommandValidateMode(t *testing.T) {
+	modes := []string{
+		"",
+		"query",
+		"ExEc",
+		"PREPARE",
+	}
+
+	for _, mode := range modes {
+		cmd := Command{Statement: "Ok", Mode: mode}
+
+		assert.NoError(t, cmd.Validate(), mode)
+		assert.Equal(t, strings.ToLower(mode), cmd.Mode)
+	}
+}
+
+func TestCommandValidateIsolation(t *testing.T) {
+	isos := []string{
+		"",
+		"default",
+		"read_committed",
+		"SNAPshot",
+	}
+
+	for _, iso := range isos {
+		cmd := Command{Statement: "Ok", Isolation: iso}
+
+		assert.NoError(t, cmd.Validate(), iso)
+		assert.Equal(t, strings.ToLower(iso), cmd.Isolation)
+	}
+}
+
+func TestCommandValidateTimeout(t *testing.T) {
+	cmd := Command{Statement: "Ok", Timeout: 0}
+
+	assert.NoError(t, cmd.Validate())
+	assert.NotZero(t, cmd.Timeout)
+
+	cmd = Command{Statement: "Ok", Timeout: 1 * time.Second}
+
+	assert.NoError(t, cmd.Validate())
+	assert.Equal(t, 1*time.Second, cmd.Timeout)
+}
+
+func TestCommandValidateArguments(t *testing.T) {
+	cmd := Command{Statement: "Ok", Arguments: Arguments{
+		Named:      map[string]interface{}{"key": "val"},
+		Positional: []interface{}{"val"},
+	}}
+
+	assert.Error(t, cmd.Validate())
+}
+
+func TestCommandUnmarshalJSON(t *testing.T) {
+	strs := []string{
+		"{\"statement\":\"Ok\"}",
+		"{\"statement\":\"Ok\",\"arguments\":[0, 3.14, \"apple\"],\"mode\":\"query\"}",
+		"{\"statement\":\"Ok\",\"isolation\":\"read_uncommitted\",\"timeout\":1000}",
+	}
+
+	for _, str := range strs {
+		var cmd Command
+		assert.NoError(t, json.Unmarshal([]byte(str), &cmd), str)
+	}
+
+	strs = []string{
+		"",
+		"\"",
+		"{}",
+		"{\"argument\":{\"key\":\"val\"}}",
+		"{\"statement\":[\"Ok\"]}",
+	}
+
+	for _, str := range strs {
+		var cmd Command
+		assert.Error(t, json.Unmarshal([]byte(str), &cmd), str)
+	}
+}
+
+func TestArgumentsValidateNotNil(t *testing.T) {
+	args := Arguments{}
+
+	assert.NoError(t, args.Validate())
+	assert.NotNil(t, args.Named)
+	assert.NotNil(t, args.Positional)
+}
+
+func TestArgumentsValidateMutuallyExclusive(t *testing.T) {
+	args := []Arguments{
+		Arguments{},
+		Arguments{Named: map[string]interface{}{"key": "val"}},
+		Arguments{Positional: []interface{}{"val"}},
+	}
+
+	for _, arg := range args {
+		assert.NoError(t, arg.Validate())
+		assert.False(t, len(arg.Named) > 0 && len(arg.Positional) > 0)
+	}
+
+	args = []Arguments{
+		Arguments{
+			Named:      map[string]interface{}{"key": "val"},
+			Positional: []interface{}{"val"},
+		},
+	}
+
+	for _, arg := range args {
+		assert.Error(t, arg.Validate())
+		assert.True(t, len(arg.Named) > 0 && len(arg.Positional) > 0)
+	}
+}
+
+func TestArgumentsValidateKeys(t *testing.T) {
+	keys := []string{
+		"",
+		"_",
+		"_key",
+		"1",
+		"1key",
+		"\xf0\x28\x8c\xbc", // non-utf8
+	}
+
+	for _, key := range keys {
+		args := Arguments{Named: map[string]interface{}{key: "val"}}
+
+		assert.Error(t, args.Validate(), key)
+	}
+}
+
+func TestArgumentsUnmarshalJSON(t *testing.T) {
+	strs := []string{
+		"{}",
+		"{\"key\":\"val\"}",
+		"{\"key\":[1, 3.14, {\"key\":\"val\"}]}",
+		"[]",
+		"[\"key\",\"val\"]",
+		"[{}]",
+	}
+
+	for _, str := range strs {
+		var args Arguments
+		assert.NoError(t, json.Unmarshal([]byte(str), &args), str)
+	}
+
+	strs = []string{
+		"",
+		"\"",
+		"1",
+		"\"key\"",
+		"{\"key\",\"val\"}",
+	}
+
+	for _, str := range strs {
+		var args Arguments
+		assert.Error(t, json.Unmarshal([]byte(str), &args), str)
+	}
+}

dbconnect/cmd.go

@@ -0,0 +1,157 @@
+package dbconnect
+
+import (
+	"context"
+	"log"
+	"net"
+	"strconv"
+
+	"gopkg.in/urfave/cli.v2"
+	"gopkg.in/urfave/cli.v2/altsrc"
+)
+
+// Cmd is the entrypoint command for dbconnect.
+//
+// The tunnel package is responsible for appending this to tunnel.Commands().
+func Cmd() *cli.Command {
+	return &cli.Command{
+		Category:  "Database Connect (ALPHA)",
+		Name:      "db-connect",
+		Usage:     "Access your SQL database from Cloudflare Workers or the browser",
+		ArgsUsage: " ",
+		Description: `
+		Creates a connection between your database and the Cloudflare edge.
+		Now you can execute SQL commands anywhere you can send HTTPS requests.
+
+		Connect your database with any of the following commands, you can also try the "playground" without a database:
+
+			cloudflared db-connect --hostname sql.mysite.com --url postgres://user:pass@localhost?sslmode=disable \
+			                       --auth-domain mysite.cloudflareaccess.com --application-aud my-access-policy-tag
+			cloudflared db-connect --hostname sql-dev.mysite.com --url mysql://localhost --insecure
+			cloudflared db-connect --playground
+		
+		Requests should be authenticated using Cloudflare Access, learn more about how to enable it here:
+
+			https://developers.cloudflare.com/access/service-auth/service-token/
+		`,
+		Flags: []cli.Flag{
+			altsrc.NewStringFlag(&cli.StringFlag{
+				Name:    "url",
+				Usage:   "URL to the database (eg. postgres://user:pass@localhost?sslmode=disable)",
+				EnvVars: []string{"TUNNEL_URL"},
+			}),
+			altsrc.NewStringFlag(&cli.StringFlag{
+				Name:    "hostname",
+				Usage:   "Hostname to accept commands over HTTPS (eg. sql.mysite.com)",
+				EnvVars: []string{"TUNNEL_HOSTNAME"},
+			}),
+			altsrc.NewStringFlag(&cli.StringFlag{
+				Name:    "auth-domain",
+				Usage:   "Cloudflare Access authentication domain for your account (eg. mysite.cloudflareaccess.com)",
+				EnvVars: []string{"TUNNEL_ACCESS_AUTH_DOMAIN"},
+			}),
+			altsrc.NewStringFlag(&cli.StringFlag{
+				Name:    "application-aud",
+				Usage:   "Cloudflare Access application \"AUD\" to verify JWTs from requests",
+				EnvVars: []string{"TUNNEL_ACCESS_APPLICATION_AUD"},
+			}),
+			altsrc.NewBoolFlag(&cli.BoolFlag{
+				Name:    "insecure",
+				Usage:   "Disable authentication, the database will be open to the Internet",
+				Value:   false,
+				EnvVars: []string{"TUNNEL_ACCESS_INSECURE"},
+			}),
+			altsrc.NewBoolFlag(&cli.BoolFlag{
+				Name:    "playground",
+				Usage:   "Run a temporary, in-memory SQLite3 database for testing",
+				Value:   false,
+				EnvVars: []string{"TUNNEL_HELLO_WORLD"},
+			}),
+			altsrc.NewStringFlag(&cli.StringFlag{
+				Name:    "loglevel",
+				Value:   "debug", // Make it more verbose than the tunnel default 'info'.
+				EnvVars: []string{"TUNNEL_LOGLEVEL"},
+				Hidden:  true,
+			}),
+		},
+		Before: CmdBefore,
+		Action: CmdAction,
+		Hidden: true,
+	}
+}
+
+// CmdBefore runs some validation checks before running the command.
+func CmdBefore(c *cli.Context) error {
+	// Show the help text is no flags are specified.
+	if c.NumFlags() == 0 {
+		return cli.ShowSubcommandHelp(c)
+	}
+
+	// Hello-world and playground are synonymous with each other,
+	// unset hello-world to prevent tunnel from initializing the hello package.
+	if c.IsSet("hello-world") {
+		c.Set("playground", "true")
+		c.Set("hello-world", "false")
+	}
+
+	// Unix-socket database urls are supported, but the logic is the same as url.
+	if c.IsSet("unix-socket") {
+		c.Set("url", c.String("unix-socket"))
+		c.Set("unix-socket", "")
+	}
+
+	// When playground mode is enabled, run with an in-memory database.
+	if c.IsSet("playground") {
+		c.Set("url", "sqlite3::memory:?cache=shared")
+		c.Set("insecure", strconv.FormatBool(!c.IsSet("auth-domain") && !c.IsSet("application-aud")))
+	}
+
+	// At this point, insecure configurations are valid.
+	if c.Bool("insecure") {
+		return nil
+	}
+
+	// Ensure that secure configurations specify a hostname, domain, and tag for JWT validation.
+	if !c.IsSet("hostname") || !c.IsSet("auth-domain") || !c.IsSet("application-aud") {
+		log.Fatal("must specify --hostname, --auth-domain, and --application-aud unless you want to run in --insecure mode")
+	}
+
+	return nil
+}
+
+// CmdAction starts the Proxy and sets the url in cli.Context to point to the Proxy address.
+func CmdAction(c *cli.Context) error {
+	// STOR-612: sync with context in tunnel daemon.
+	ctx := context.Background()
+
+	var proxy *Proxy
+	var err error
+	if c.Bool("insecure") {
+		proxy, err = NewInsecureProxy(ctx, c.String("url"))
+	} else {
+		proxy, err = NewSecureProxy(ctx, c.String("url"), c.String("auth-domain"), c.String("application-aud"))
+	}
+
+	if err != nil {
+		log.Fatal(err)
+		return err
+	}
+
+	listenerC := make(chan net.Listener)
+	defer close(listenerC)
+
+	// Since the Proxy should only talk to the tunnel daemon, find the next available
+	// localhost port and start to listen to requests.
+	go func() {
+		err := proxy.Start(ctx, "127.0.0.1:", listenerC)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}()
+
+	// Block until the the Proxy is online, retreive its address, and change the url to point to it.
+	// This is effectively "handing over" control to the tunnel package so it can run the tunnel daemon.
+	c.Set("url", "https://"+(<-listenerC).Addr().String())
+
+	return nil
+}

dbconnect/cmd_test.go

@@ -0,0 +1,27 @@
+package dbconnect
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"gopkg.in/urfave/cli.v2"
+)
+
+func TestCmd(t *testing.T) {
+	tests := [][]string{
+		{"cloudflared", "db-connect", "--playground"},
+		{"cloudflared", "db-connect", "--playground", "--hostname", "sql.mysite.com"},
+		{"cloudflared", "db-connect", "--url", "sqlite3::memory:?cache=shared", "--insecure"},
+		{"cloudflared", "db-connect", "--url", "sqlite3::memory:?cache=shared", "--hostname", "sql.mysite.com", "--auth-domain", "mysite.cloudflareaccess.com", "--application-aud", "aud"},
+	}
+
+	app := &cli.App{
+		Name:     "cloudflared",
+		Commands: []*cli.Command{Cmd()},
+	}
+
+	for _, test := range tests {
+		assert.NoError(t, app.Run(test))
+	}
+}

dbconnect/integration_test/dbconnect.yaml

@@ -0,0 +1,78 @@
+# docker-compose -f ./dbconnect/integration_test/dbconnect.yaml up --build --force-recreate --renew-anon-volumes --exit-code-from cloudflared
+
+version: "2.3"
+networks:
+  test-dbconnect-network:
+    driver: bridge
+services:
+  cloudflared:
+    build:
+      context: ../../
+      dockerfile: dev.Dockerfile
+    command: go test github.com/cloudflare/cloudflared/dbconnect/integration_test -v
+    depends_on:
+      postgres:
+        condition: service_healthy
+      mysql:
+        condition: service_healthy
+      mssql:
+        condition: service_healthy
+      clickhouse:
+        condition: service_healthy
+    environment:
+      DBCONNECT_INTEGRATION_TEST: "true"
+      POSTGRESQL_URL: postgres://postgres:secret@postgres/db?sslmode=disable
+      MYSQL_URL: mysql://root:secret@mysql/db?tls=false
+      MSSQL_URL: mssql://sa:secret12345!@mssql
+      CLICKHOUSE_URL: clickhouse://clickhouse:9000/db
+    networks:
+      - test-dbconnect-network
+  postgres:
+    image: postgres:11.4-alpine
+    environment:
+      POSTGRES_DB: db
+      POSTGRES_PASSWORD: secret
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "postgres"]
+      start_period: 3s
+      interval: 1s
+      timeout: 3s
+      retries: 10
+    networks:
+      - test-dbconnect-network
+  mysql:
+    image: mysql:8.0
+    environment:
+      MYSQL_DATABASE: db
+      MYSQL_ROOT_PASSWORD: secret
+    healthcheck:
+      test: ["CMD", "mysqladmin", "ping"]
+      start_period: 3s
+      interval: 1s
+      timeout: 3s
+      retries: 10
+    networks:
+      - test-dbconnect-network
+  mssql:
+    image: mcr.microsoft.com/mssql/server:2017-CU8-ubuntu
+    environment:
+      ACCEPT_EULA: "Y"
+      SA_PASSWORD: secret12345!
+    healthcheck:
+      test: ["CMD", "/opt/mssql-tools/bin/sqlcmd", "-S", "localhost", "-U", "sa", "-P", "secret12345!", "-Q", "SELECT 1"]
+      start_period: 3s
+      interval: 1s
+      timeout: 3s
+      retries: 10
+    networks:
+      - test-dbconnect-network
+  clickhouse:
+    image: yandex/clickhouse-server:19.11
+    healthcheck:
+      test: ["CMD", "clickhouse-client", "--query", "SELECT 1"]
+      start_period: 3s
+      interval: 1s
+      timeout: 3s
+      retries: 10
+    networks:
+      - test-dbconnect-network

dbconnect/integration_test/sql_test.go

@@ -0,0 +1,265 @@
+package dbconnect_test
+
+import (
+	"context"
+	"log"
+	"net/url"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/cloudflare/cloudflared/dbconnect"
+)
+
+func TestIntegrationPostgreSQL(t *testing.T) {
+	ctx, pq := helperNewSQLClient(t, "POSTGRESQL_URL")
+
+	err := pq.Ping(ctx)
+	assert.NoError(t, err)
+
+	_, err = pq.Submit(ctx, &dbconnect.Command{
+		Statement: "CREATE TABLE t (a TEXT, b UUID, c JSON, d INET[], e SERIAL);",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+
+	_, err = pq.Submit(ctx, &dbconnect.Command{
+		Statement: "INSERT INTO t VALUES ($1, $2, $3, $4);",
+		Mode:      "exec",
+		Arguments: dbconnect.Arguments{
+			Positional: []interface{}{
+				"text",
+				"6b8d686d-bd8e-43bc-b09a-cfcbbe702c10",
+				"{\"bool\":true,\"array\":[\"a\", 1, 3.14],\"embed\":{\"num\":21}}",
+				[]string{"1.1.1.1", "1.0.0.1"},
+			},
+		},
+	})
+	assert.NoError(t, err)
+
+	_, err = pq.Submit(ctx, &dbconnect.Command{
+		Statement: "UPDATE t SET b = NULL;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+
+	res, err := pq.Submit(ctx, &dbconnect.Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "query",
+	})
+	assert.NoError(t, err)
+	assert.IsType(t, make([]map[string]interface{}, 0), res)
+
+	actual := res.([]map[string]interface{})[0]
+	expected := map[string]interface{}{
+		"a": "text",
+		"b": nil,
+		"c": map[string]interface{}{
+			"bool":  true,
+			"array": []interface{}{"a", float64(1), 3.14},
+			"embed": map[string]interface{}{"num": float64(21)},
+		},
+		"d": "{1.1.1.1,1.0.0.1}",
+		"e": int64(1),
+	}
+	assert.EqualValues(t, expected, actual)
+
+	_, err = pq.Submit(ctx, &dbconnect.Command{
+		Statement: "DROP TABLE t;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+}
+
+func TestIntegrationMySQL(t *testing.T) {
+	ctx, my := helperNewSQLClient(t, "MYSQL_URL")
+
+	err := my.Ping(ctx)
+	assert.NoError(t, err)
+
+	_, err = my.Submit(ctx, &dbconnect.Command{
+		Statement: "CREATE TABLE t (a CHAR, b TINYINT, c FLOAT, d JSON, e YEAR);",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+
+	_, err = my.Submit(ctx, &dbconnect.Command{
+		Statement: "INSERT INTO t VALUES (?, ?, ?, ?, ?);",
+		Mode:      "exec",
+		Arguments: dbconnect.Arguments{
+			Positional: []interface{}{
+				"a",
+				10,
+				3.14,
+				"{\"bool\":true}",
+				2000,
+			},
+		},
+	})
+	assert.NoError(t, err)
+
+	_, err = my.Submit(ctx, &dbconnect.Command{
+		Statement: "ALTER TABLE t ADD COLUMN f GEOMETRY;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+
+	res, err := my.Submit(ctx, &dbconnect.Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "query",
+	})
+	assert.NoError(t, err)
+	assert.IsType(t, make([]map[string]interface{}, 0), res)
+
+	actual := res.([]map[string]interface{})[0]
+	expected := map[string]interface{}{
+		"a": "a",
+		"b": float64(10),
+		"c": 3.14,
+		"d": map[string]interface{}{"bool": true},
+		"e": float64(2000),
+		"f": nil,
+	}
+	assert.EqualValues(t, expected, actual)
+
+	_, err = my.Submit(ctx, &dbconnect.Command{
+		Statement: "DROP TABLE t;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+}
+
+func TestIntegrationMSSQL(t *testing.T) {
+	ctx, ms := helperNewSQLClient(t, "MSSQL_URL")
+
+	err := ms.Ping(ctx)
+	assert.NoError(t, err)
+
+	_, err = ms.Submit(ctx, &dbconnect.Command{
+		Statement: "CREATE TABLE t (a BIT, b DECIMAL, c MONEY, d TEXT);",
+		Mode:      "exec"})
+	assert.NoError(t, err)
+
+	_, err = ms.Submit(ctx, &dbconnect.Command{
+		Statement: "INSERT INTO t VALUES (?, ?, ?, ?);",
+		Mode:      "exec",
+		Arguments: dbconnect.Arguments{
+			Positional: []interface{}{
+				0,
+				3,
+				"$0.99",
+				"text",
+			},
+		},
+	})
+	assert.NoError(t, err)
+
+	_, err = ms.Submit(ctx, &dbconnect.Command{
+		Statement: "UPDATE t SET d = NULL;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+
+	res, err := ms.Submit(ctx, &dbconnect.Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "query",
+	})
+	assert.NoError(t, err)
+	assert.IsType(t, make([]map[string]interface{}, 0), res)
+
+	actual := res.([]map[string]interface{})[0]
+	expected := map[string]interface{}{
+		"a": false,
+		"b": float64(3),
+		"c": float64(0.99),
+		"d": nil,
+	}
+	assert.EqualValues(t, expected, actual)
+
+	_, err = ms.Submit(ctx, &dbconnect.Command{
+		Statement: "DROP TABLE t;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+}
+
+func TestIntegrationClickhouse(t *testing.T) {
+	ctx, ch := helperNewSQLClient(t, "CLICKHOUSE_URL")
+
+	err := ch.Ping(ctx)
+	assert.NoError(t, err)
+
+	_, err = ch.Submit(ctx, &dbconnect.Command{
+		Statement: "CREATE TABLE t (a UUID, b String, c Float64, d UInt32, e Int16, f Array(Enum8('a'=1, 'b'=2, 'c'=3))) engine=Memory;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+
+	_, err = ch.Submit(ctx, &dbconnect.Command{
+		Statement: "INSERT INTO t VALUES (?, ?, ?, ?, ?, ?);",
+		Mode:      "exec",
+		Arguments: dbconnect.Arguments{
+			Positional: []interface{}{
+				"ec65f626-6f50-4c86-9628-6314ef1edacd",
+				"",
+				3.14,
+				314,
+				-144,
+				[]string{"a", "b", "c"},
+			},
+		},
+	})
+	assert.NoError(t, err)
+
+	res, err := ch.Submit(ctx, &dbconnect.Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "query",
+	})
+	assert.NoError(t, err)
+	assert.IsType(t, make([]map[string]interface{}, 0), res)
+
+	actual := res.([]map[string]interface{})[0]
+	expected := map[string]interface{}{
+		"a": "ec65f626-6f50-4c86-9628-6314ef1edacd",
+		"b": "",
+		"c": float64(3.14),
+		"d": uint32(314),
+		"e": int16(-144),
+		"f": []string{"a", "b", "c"},
+	}
+	assert.EqualValues(t, expected, actual)
+
+	_, err = ch.Submit(ctx, &dbconnect.Command{
+		Statement: "DROP TABLE t;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+}
+
+func helperNewSQLClient(t *testing.T, env string) (context.Context, dbconnect.Client) {
+	_, ok := os.LookupEnv("DBCONNECT_INTEGRATION_TEST")
+	if ok {
+		t.Helper()
+	} else {
+		t.SkipNow()
+	}
+
+	val, ok := os.LookupEnv(env)
+	if !ok {
+		log.Fatalf("must provide database url as environment variable: %s", env)
+	}
+
+	parsed, err := url.Parse(val)
+	if err != nil {
+		log.Fatalf("cannot provide invalid database url: %s=%s", env, val)
+	}
+
+	ctx := context.Background()
+	client, err := dbconnect.NewSQLClient(ctx, parsed)
+	if err != nil {
+		log.Fatalf("could not start test client: %s", err)
+	}
+
+	return ctx, client
+}

dbconnect/proxy.go

@@ -0,0 +1,274 @@
+package dbconnect
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/cloudflare/cloudflared/hello"
+	"github.com/cloudflare/cloudflared/validation"
+	"github.com/gorilla/mux"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+
+	timing "github.com/mitchellh/go-server-timing"
+)
+
+// Proxy is an HTTP server that proxies requests to a Client.
+type Proxy struct {
+	client          Client
+	accessValidator *validation.Access
+	logger          *logrus.Logger
+}
+
+// NewInsecureProxy creates a Proxy that talks to a Client at an origin.
+//
+// In insecure mode, the Proxy will allow all Command requests.
+func NewInsecureProxy(ctx context.Context, origin string) (*Proxy, error) {
+	originURL, err := url.Parse(origin)
+	if err != nil {
+		return nil, errors.Wrap(err, "must provide a valid database url")
+	}
+
+	client, err := NewClient(ctx, originURL)
+	if err != nil {
+		return nil, err
+	}
+
+	err = client.Ping(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not connect to the database")
+	}
+
+	return &Proxy{client, nil, logrus.New()}, nil
+}
+
+// NewSecureProxy creates a Proxy that talks to a Client at an origin.
+//
+// In secure mode, the Proxy will reject any Command requests that are
+// not authenticated by Cloudflare Access with a valid JWT.
+func NewSecureProxy(ctx context.Context, origin, authDomain, applicationAUD string) (*Proxy, error) {
+	proxy, err := NewInsecureProxy(ctx, origin)
+	if err != nil {
+		return nil, err
+	}
+
+	validator, err := validation.NewAccessValidator(ctx, authDomain, authDomain, applicationAUD)
+	if err != nil {
+		return nil, err
+	}
+
+	proxy.accessValidator = validator
+	return proxy, err
+}
+
+// IsInsecure gets whether the Proxy will accept a Command from any source.
+func (proxy *Proxy) IsInsecure() bool {
+	return proxy.accessValidator == nil
+}
+
+// IsAllowed checks whether a http.Request is allowed to receive data.
+//
+// By default, requests must pass through Cloudflare Access for authentication.
+// If the proxy is explcitly set to insecure mode, all requests will be allowed.
+func (proxy *Proxy) IsAllowed(r *http.Request, verbose ...bool) bool {
+	if proxy.IsInsecure() {
+		return true
+	}
+
+	// Access and Tunnel should prevent bad JWTs from even reaching the origin,
+	// but validate tokens anyway as an abundance of caution.
+	err := proxy.accessValidator.ValidateRequest(r.Context(), r)
+	if err == nil {
+		return true
+	}
+
+	// Warn administrators that invalid JWTs are being rejected. This is indicative
+	// of either a misconfiguration of the CLI or a massive failure of upstream systems.
+	if len(verbose) > 0 {
+		proxy.httpLog(r, err).Error("Failed JWT authentication")
+	}
+
+	return false
+}
+
+// Start the Proxy at a given address and notify the listener channel when the server is online.
+func (proxy *Proxy) Start(ctx context.Context, addr string, listenerC chan<- net.Listener) error {
+	// STOR-611: use a seperate listener and consider web socket support.
+	httpListener, err := hello.CreateTLSListener(addr)
+	if err != nil {
+		return errors.Wrapf(err, "could not create listener at %s", addr)
+	}
+
+	errC := make(chan error)
+	defer close(errC)
+
+	// Starts the HTTP server and begins to serve requests.
+	go func() {
+		errC <- proxy.httpListen(ctx, httpListener)
+	}()
+
+	// Continually ping the server until it comes online or 10 attempts fail.
+	go func() {
+		var err error
+		for i := 0; i < 10; i++ {
+			_, err = http.Get("http://" + httpListener.Addr().String())
+
+			// Once no error was detected, notify the listener channel and return.
+			if err == nil {
+				listenerC <- httpListener
+				return
+			}
+
+			// Backoff between requests to ping the server.
+			<-time.After(1 * time.Second)
+		}
+		errC <- errors.Wrap(err, "took too long for the http server to start")
+	}()
+
+	return <-errC
+}
+
+// httpListen starts the httpServer and blocks until the context closes.
+func (proxy *Proxy) httpListen(ctx context.Context, listener net.Listener) error {
+	httpServer := &http.Server{
+		Addr:         listener.Addr().String(),
+		Handler:      timing.Middleware(proxy.httpRouter(), nil),
+		ReadTimeout:  10 * time.Second,
+		WriteTimeout: 60 * time.Second,
+		IdleTimeout:  60 * time.Second,
+	}
+
+	go func() {
+		<-ctx.Done()
+		httpServer.Close()
+		listener.Close()
+	}()
+
+	return httpServer.Serve(listener)
+}
+
+// httpRouter creates a mux.Router for the Proxy.
+func (proxy *Proxy) httpRouter() *mux.Router {
+	router := mux.NewRouter()
+
+	router.HandleFunc("/ping", proxy.httpPing()).Methods("GET", "HEAD")
+	router.HandleFunc("/submit", proxy.httpSubmit()).Methods("POST")
+
+	return router
+}
+
+// httpPing tests the connection to the database.
+//
+// By default, this endpoint is unauthenticated to allow for health checks.
+// To enable authentication, Cloudflare Access must be enabled on this route.
+func (proxy *Proxy) httpPing() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+		metric := timing.FromContext(ctx).NewMetric("db").Start()
+		err := proxy.client.Ping(ctx)
+		metric.Stop()
+
+		if err == nil {
+			proxy.httpRespond(w, r, http.StatusOK, "")
+		} else {
+			proxy.httpRespondErr(w, r, http.StatusInternalServerError, err)
+		}
+	}
+}
+
+// httpSubmit sends a command to the database and returns its response.
+//
+// By default, this endpoint will reject requests that do not pass through Cloudflare Access.
+// To disable authentication, the --insecure flag must be specified in the command line.
+func (proxy *Proxy) httpSubmit() http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if !proxy.IsAllowed(r, true) {
+			proxy.httpRespondErr(w, r, http.StatusForbidden, fmt.Errorf(""))
+			return
+		}
+
+		var cmd Command
+		err := json.NewDecoder(r.Body).Decode(&cmd)
+		if err != nil {
+			proxy.httpRespondErr(w, r, http.StatusBadRequest, err)
+			return
+		}
+
+		ctx := r.Context()
+		metric := timing.FromContext(ctx).NewMetric("db").Start()
+		data, err := proxy.client.Submit(ctx, &cmd)
+		metric.Stop()
+
+		if err != nil {
+			proxy.httpRespondErr(w, r, http.StatusUnprocessableEntity, err)
+			return
+		}
+
+		w.Header().Set("Content-type", "application/json")
+		err = json.NewEncoder(w).Encode(data)
+		if err != nil {
+			proxy.httpRespondErr(w, r, http.StatusInternalServerError, err)
+		}
+	}
+}
+
+// httpRespond writes a status code and string response to the response writer.
+func (proxy *Proxy) httpRespond(w http.ResponseWriter, r *http.Request, status int, message string) {
+	w.WriteHeader(status)
+
+	// Only expose the message detail of the reponse if the request is not HEAD
+	// and the user is authenticated. For example, this prevents an unauthenticated
+	// failed health check from accidentally leaking sensitive information about the Client.
+	if r.Method != http.MethodHead && proxy.IsAllowed(r) {
+		if message == "" {
+			message = http.StatusText(status)
+		}
+		fmt.Fprint(w, message)
+	}
+}
+
+// httpRespondErr is similar to httpRespond, except it formats errors to be more friendly.
+func (proxy *Proxy) httpRespondErr(w http.ResponseWriter, r *http.Request, defaultStatus int, err error) {
+	status, err := httpError(defaultStatus, err)
+
+	proxy.httpRespond(w, r, status, err.Error())
+	proxy.httpLog(r, err).Warn("Database connect error")
+}
+
+// httpLog returns a logrus.Entry that is formatted to output a request Cf-ray.
+func (proxy *Proxy) httpLog(r *http.Request, err error) *logrus.Entry {
+	return proxy.logger.WithContext(r.Context()).WithField("CF-RAY", r.Header.Get("Cf-ray")).WithError(err)
+}
+
+// httpError extracts common errors and returns an status code and friendly error.
+func httpError(defaultStatus int, err error) (int, error) {
+	if err == nil {
+		return http.StatusNotImplemented, fmt.Errorf("error expected but found none")
+	}
+
+	if err == io.EOF {
+		return http.StatusBadRequest, fmt.Errorf("request body cannot be empty")
+	}
+
+	if err == context.DeadlineExceeded {
+		return http.StatusRequestTimeout, err
+	}
+
+	_, ok := err.(net.Error)
+	if ok {
+		return http.StatusRequestTimeout, err
+	}
+
+	if err == context.Canceled {
+		// Does not exist in Golang, but would be: http.StatusClientClosedWithoutResponse
+		return 444, err
+	}
+
+	return defaultStatus, err
+}

dbconnect/proxy_test.go

@@ -0,0 +1,238 @@
+package dbconnect
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/gorilla/mux"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewInsecureProxy(t *testing.T) {
+	origins := []string{
+		"",
+		":/",
+		"http://localhost",
+		"tcp://localhost:9000?debug=true",
+		"mongodb://127.0.0.1",
+	}
+
+	for _, origin := range origins {
+		proxy, err := NewInsecureProxy(context.Background(), origin)
+
+		assert.Error(t, err)
+		assert.Empty(t, proxy)
+	}
+}
+
+func TestProxyIsAllowed(t *testing.T) {
+	proxy := helperNewProxy(t)
+	req := httptest.NewRequest("GET", "https://1.1.1.1/ping", nil)
+	assert.True(t, proxy.IsAllowed(req))
+
+	proxy = helperNewProxy(t, true)
+	req.Header.Set("Cf-access-jwt-assertion", "xxx")
+	assert.False(t, proxy.IsAllowed(req))
+}
+
+func TestProxyStart(t *testing.T) {
+	proxy := helperNewProxy(t)
+	ctx := context.Background()
+	listenerC := make(chan net.Listener)
+
+	err := proxy.Start(ctx, "1.1.1.1:", listenerC)
+	assert.Error(t, err)
+
+	err = proxy.Start(ctx, "127.0.0.1:-1", listenerC)
+	assert.Error(t, err)
+
+	ctx, cancel := context.WithTimeout(ctx, 0)
+	defer cancel()
+
+	err = proxy.Start(ctx, "127.0.0.1:", listenerC)
+	assert.IsType(t, http.ErrServerClosed, err)
+}
+
+func TestProxyHTTPRouter(t *testing.T) {
+	proxy := helperNewProxy(t)
+	router := proxy.httpRouter()
+
+	tests := []struct {
+		path   string
+		method string
+		valid  bool
+	}{
+		{"", "GET", false},
+		{"/", "GET", false},
+		{"/ping", "GET", true},
+		{"/ping", "HEAD", true},
+		{"/ping", "POST", false},
+		{"/submit", "POST", true},
+		{"/submit", "GET", false},
+		{"/submit/extra", "POST", false},
+	}
+
+	for _, test := range tests {
+		match := &mux.RouteMatch{}
+		ok := router.Match(httptest.NewRequest(test.method, "https://1.1.1.1"+test.path, nil), match)
+
+		assert.True(t, ok == test.valid, test.path)
+	}
+}
+
+func TestProxyHTTPPing(t *testing.T) {
+	proxy := helperNewProxy(t)
+
+	server := httptest.NewServer(proxy.httpPing())
+	defer server.Close()
+	client := server.Client()
+
+	res, err := client.Get(server.URL)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, res.StatusCode)
+	assert.Equal(t, int64(2), res.ContentLength)
+
+	res, err = client.Head(server.URL)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusOK, res.StatusCode)
+	assert.Equal(t, int64(-1), res.ContentLength)
+}
+
+func TestProxyHTTPSubmit(t *testing.T) {
+	proxy := helperNewProxy(t)
+
+	server := httptest.NewServer(proxy.httpSubmit())
+	defer server.Close()
+	client := server.Client()
+
+	tests := []struct {
+		input  string
+		status int
+		output string
+	}{
+		{"", http.StatusBadRequest, "request body cannot be empty"},
+		{"{}", http.StatusBadRequest, "cannot provide an empty statement"},
+		{"{\"statement\":\"Ok\"}", http.StatusUnprocessableEntity, "cannot provide invalid sql mode: ''"},
+		{"{\"statement\":\"Ok\",\"mode\":\"query\"}", http.StatusUnprocessableEntity, "near \"Ok\": syntax error"},
+		{"{\"statement\":\"CREATE TABLE t (a INT);\",\"mode\":\"exec\"}", http.StatusOK, "{\"last_insert_id\":0,\"rows_affected\":0}\n"},
+	}
+
+	for _, test := range tests {
+		res, err := client.Post(server.URL, "application/json", strings.NewReader(test.input))
+
+		assert.NoError(t, err)
+		assert.Equal(t, test.status, res.StatusCode)
+		if res.StatusCode > http.StatusOK {
+			assert.Equal(t, "text/plain; charset=utf-8", res.Header.Get("Content-type"))
+		} else {
+			assert.Equal(t, "application/json", res.Header.Get("Content-type"))
+		}
+
+		data, err := ioutil.ReadAll(res.Body)
+		defer res.Body.Close()
+		str := string(data)
+
+		assert.NoError(t, err)
+		assert.Equal(t, test.output, str)
+	}
+}
+
+func TestProxyHTTPSubmitForbidden(t *testing.T) {
+	proxy := helperNewProxy(t, true)
+
+	server := httptest.NewServer(proxy.httpSubmit())
+	defer server.Close()
+	client := server.Client()
+
+	res, err := client.Get(server.URL)
+
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusForbidden, res.StatusCode)
+	assert.Zero(t, res.ContentLength)
+}
+
+func TestProxyHTTPRespond(t *testing.T) {
+	proxy := helperNewProxy(t)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		proxy.httpRespond(w, r, http.StatusAccepted, "Hello")
+	}))
+	defer server.Close()
+	client := server.Client()
+
+	res, err := client.Get(server.URL)
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusAccepted, res.StatusCode)
+	assert.Equal(t, int64(5), res.ContentLength)
+
+	data, err := ioutil.ReadAll(res.Body)
+	defer res.Body.Close()
+	assert.Equal(t, []byte("Hello"), data)
+}
+
+func TestProxyHTTPRespondForbidden(t *testing.T) {
+	proxy := helperNewProxy(t, true)
+
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		proxy.httpRespond(w, r, http.StatusAccepted, "Hello")
+	}))
+	defer server.Close()
+	client := server.Client()
+
+	res, err := client.Get(server.URL)
+
+	assert.NoError(t, err)
+	assert.Equal(t, http.StatusAccepted, res.StatusCode)
+	assert.Equal(t, int64(0), res.ContentLength)
+}
+
+func TestHTTPError(t *testing.T) {
+	_, errTimeout := net.DialTimeout("tcp", "127.0.0.1", 0)
+	assert.Error(t, errTimeout)
+
+	tests := []struct {
+		input  error
+		status int
+		output error
+	}{
+		{nil, http.StatusNotImplemented, fmt.Errorf("error expected but found none")},
+		{io.EOF, http.StatusBadRequest, fmt.Errorf("request body cannot be empty")},
+		{context.DeadlineExceeded, http.StatusRequestTimeout, nil},
+		{context.Canceled, 444, nil},
+		{errTimeout, http.StatusRequestTimeout, nil},
+		{fmt.Errorf(""), http.StatusInternalServerError, nil},
+	}
+
+	for _, test := range tests {
+		status, err := httpError(http.StatusInternalServerError, test.input)
+
+		assert.Error(t, err)
+		assert.Equal(t, test.status, status)
+		if test.output == nil {
+			test.output = test.input
+		}
+		assert.Equal(t, test.output, err)
+	}
+}
+
+func helperNewProxy(t *testing.T, secure ...bool) *Proxy {
+	t.Helper()
+
+	proxy, err := NewSecureProxy(context.Background(), "file::memory:?cache=shared", "test.cloudflareaccess.com", "")
+	assert.NoError(t, err)
+	assert.NotNil(t, proxy)
+
+	if len(secure) == 0 {
+		proxy.accessValidator = nil // Mark as insecure
+	}
+
+	return proxy
+}

dbconnect/sql.go

@@ -0,0 +1,318 @@
+package dbconnect
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+	"net/url"
+	"reflect"
+	"strings"
+
+	"github.com/jmoiron/sqlx"
+	"github.com/pkg/errors"
+	"github.com/xo/dburl"
+
+	// SQL drivers self-register with the database/sql package.
+	// https://github.com/golang/go/wiki/SQLDrivers
+	_ "github.com/denisenkom/go-mssqldb"
+	_ "github.com/go-sql-driver/mysql"
+	_ "github.com/mattn/go-sqlite3"
+
+	"github.com/kshvakov/clickhouse"
+	"github.com/lib/pq"
+)
+
+// SQLClient is a Client that talks to a SQL database.
+type SQLClient struct {
+	Dialect string
+	driver  *sqlx.DB
+}
+
+// NewSQLClient creates a SQL client based on its URL scheme.
+func NewSQLClient(ctx context.Context, originURL *url.URL) (Client, error) {
+	res, err := dburl.Parse(originURL.String())
+	if err != nil {
+		helpText := fmt.Sprintf("supported drivers: %+q, see documentation for more details: %s", sql.Drivers(), "https://godoc.org/github.com/xo/dburl")
+		return nil, fmt.Errorf("could not parse sql database url '%s': %s\n%s", originURL, err.Error(), helpText)
+	}
+
+	// Establishes the driver, but does not test the connection.
+	driver, err := sqlx.Open(res.Driver, res.DSN)
+	if err != nil {
+		return nil, fmt.Errorf("could not open sql driver %s: %s\n%s", res.Driver, err.Error(), res.DSN)
+	}
+
+	// Closes the driver, will occur when the context finishes.
+	go func() {
+		<-ctx.Done()
+		driver.Close()
+	}()
+
+	return &SQLClient{driver.DriverName(), driver}, nil
+}
+
+// Ping verifies a connection to the database is still alive.
+func (client *SQLClient) Ping(ctx context.Context) error {
+	return client.driver.PingContext(ctx)
+}
+
+// Submit queries or executes a command to the SQL database.
+func (client *SQLClient) Submit(ctx context.Context, cmd *Command) (interface{}, error) {
+	txx, err := cmd.ValidateSQL(client.Dialect)
+	if err != nil {
+		return nil, err
+	}
+
+	ctx, cancel := context.WithTimeout(ctx, cmd.Timeout)
+	defer cancel()
+
+	var res interface{}
+
+	// Get the next available sql.Conn and submit the Command.
+	err = sqlConn(ctx, client.driver, txx, func(conn *sql.Conn) error {
+		stmt := cmd.Statement
+		args := cmd.Arguments.Positional
+
+		if cmd.Mode == "query" {
+			res, err = sqlQuery(ctx, conn, stmt, args)
+		} else {
+			res, err = sqlExec(ctx, conn, stmt, args)
+		}
+
+		return err
+	})
+
+	return res, err
+}
+
+// ValidateSQL extends the contract of Command for SQL dialects:
+// mode is conformed, arguments are []sql.NamedArg, and isolation is a sql.IsolationLevel.
+//
+// When the command should not be wrapped in a transaction, *sql.TxOptions and error will both be nil.
+func (cmd *Command) ValidateSQL(dialect string) (*sql.TxOptions, error) {
+	err := cmd.Validate()
+	if err != nil {
+		return nil, err
+	}
+
+	mode, err := sqlMode(cmd.Mode)
+	if err != nil {
+		return nil, err
+	}
+
+	// Mutates Arguments to only use positional arguments with the type sql.NamedArg.
+	// This is a required by the sql.Driver before submitting arguments.
+	cmd.Arguments.sql(dialect)
+
+	iso, err := sqlIsolation(cmd.Isolation)
+	if err != nil {
+		return nil, err
+	}
+
+	// When isolation is out-of-range, this is indicative that no
+	// transaction should be executed and sql.TxOptions should be nil.
+	if iso < sql.LevelDefault {
+		return nil, nil
+	}
+
+	// In query mode, execute the transaction in read-only, unless it's Microsoft SQL
+	// which does not support that type of transaction.
+	readOnly := mode == "query" && dialect != "mssql"
+
+	return &sql.TxOptions{Isolation: iso, ReadOnly: readOnly}, nil
+}
+
+// sqlConn gets the next available sql.Conn in the connection pool and runs a function to use it.
+//
+// If the transaction options are nil, run the useIt function outside a transaction.
+// This is potentially an unsafe operation if the command does not clean up its state.
+func sqlConn(ctx context.Context, driver *sqlx.DB, txx *sql.TxOptions, useIt func(*sql.Conn) error) error {
+	conn, err := driver.Conn(ctx)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	// If transaction options are specified, begin and defer a rollback to catch errors.
+	var tx *sql.Tx
+	if txx != nil {
+		tx, err = conn.BeginTx(ctx, txx)
+		if err != nil {
+			return err
+		}
+		defer tx.Rollback()
+	}
+
+	err = useIt(conn)
+
+	// Check if useIt was successful and a transaction exists before committing.
+	if err == nil && tx != nil {
+		err = tx.Commit()
+	}
+
+	return err
+}
+
+// sqlQuery queries rows on a sql.Conn and returns an array of result objects.
+func sqlQuery(ctx context.Context, conn *sql.Conn, stmt string, args []interface{}) ([]map[string]interface{}, error) {
+	rows, err := conn.QueryContext(ctx, stmt, args...)
+	if err == nil {
+		return sqlRows(rows)
+	}
+	return nil, err
+}
+
+// sqlExec executes a command on a sql.Conn and returns the result of the operation.
+func sqlExec(ctx context.Context, conn *sql.Conn, stmt string, args []interface{}) (sqlResult, error) {
+	exec, err := conn.ExecContext(ctx, stmt, args...)
+	if err == nil {
+		return sqlResultFrom(exec), nil
+	}
+	return sqlResult{}, err
+}
+
+// sql mutates Arguments to contain a positional []sql.NamedArg.
+//
+// The actual return type is []interface{} due to the native Golang
+// function signatures for sql.Exec and sql.Query being generic.
+func (args *Arguments) sql(dialect string) {
+	result := args.Positional
+
+	for i, val := range result {
+		result[i] = sqlArg("", val, dialect)
+	}
+
+	for key, val := range args.Named {
+		result = append(result, sqlArg(key, val, dialect))
+	}
+
+	args.Positional = result
+	args.Named = map[string]interface{}{}
+}
+
+// sqlArg creates a sql.NamedArg from a key-value pair and an optional dialect.
+//
+// Certain dialects will need to wrap objects, such as arrays, to conform its driver requirements.
+func sqlArg(key, val interface{}, dialect string) sql.NamedArg {
+	switch reflect.ValueOf(val).Kind() {
+
+	// PostgreSQL and Clickhouse require arrays to be wrapped before
+	// being inserted into the driver interface.
+	case reflect.Slice, reflect.Array:
+		switch dialect {
+		case "postgres":
+			val = pq.Array(val)
+		case "clickhouse":
+			val = clickhouse.Array(val)
+		}
+	}
+
+	return sql.Named(fmt.Sprint(key), val)
+}
+
+// sqlIsolation tries to match a string to a sql.IsolationLevel.
+func sqlIsolation(str string) (sql.IsolationLevel, error) {
+	if str == "none" {
+		return sql.IsolationLevel(-1), nil
+	}
+
+	for iso := sql.LevelDefault; ; iso++ {
+		if iso > sql.LevelLinearizable {
+			return -1, fmt.Errorf("cannot provide an invalid sql isolation level: '%s'", str)
+		}
+
+		if str == "" || strings.EqualFold(iso.String(), strings.ReplaceAll(str, "_", " ")) {
+			return iso, nil
+		}
+	}
+}
+
+// sqlMode tries to match a string to a command mode: 'query' or 'exec' for now.
+func sqlMode(str string) (string, error) {
+	switch str {
+	case "query", "exec":
+		return str, nil
+	default:
+		return "", fmt.Errorf("cannot provide invalid sql mode: '%s'", str)
+	}
+}
+
+// sqlRows scans through a SQL result set and returns an array of objects.
+func sqlRows(rows *sql.Rows) ([]map[string]interface{}, error) {
+	columns, err := rows.Columns()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not extract columns from result")
+	}
+	defer rows.Close()
+
+	types, err := rows.ColumnTypes()
+	if err != nil {
+		// Some drivers do not support type extraction, so fail silently and continue.
+		types = make([]*sql.ColumnType, len(columns))
+	}
+
+	values := make([]interface{}, len(columns))
+	pointers := make([]interface{}, len(columns))
+
+	var results []map[string]interface{}
+	for rows.Next() {
+		for i := range columns {
+			pointers[i] = &values[i]
+		}
+		rows.Scan(pointers...)
+
+		// Convert a row, an array of values, into an object where
+		// each key is the name of its respective column.
+		entry := make(map[string]interface{})
+		for i, col := range columns {
+			entry[col] = sqlValue(values[i], types[i])
+		}
+		results = append(results, entry)
+	}
+
+	return results, nil
+}
+
+// sqlValue handles special cases where sql.Rows does not return a "human-readable" object.
+func sqlValue(val interface{}, col *sql.ColumnType) interface{} {
+	bytes, ok := val.([]byte)
+	if ok {
+		// Opportunistically check for embeded JSON and convert it to a first-class object.
+		var embeded interface{}
+		if json.Unmarshal(bytes, &embeded) == nil {
+			return embeded
+		}
+
+		// STOR-604: investigate a way to coerce PostgreSQL arrays '{a, b, ...}' into JSON.
+		// Although easy with strings, it becomes more difficult with special types like INET[].
+
+		return string(bytes)
+	}
+
+	return val
+}
+
+// sqlResult is a thin wrapper around sql.Result.
+type sqlResult struct {
+	LastInsertId int64 `json:"last_insert_id"`
+	RowsAffected int64 `json:"rows_affected"`
+}
+
+// sqlResultFrom converts sql.Result into a JSON-marshable sqlResult.
+func sqlResultFrom(res sql.Result) sqlResult {
+	insertID, errID := res.LastInsertId()
+	rowsAffected, errRows := res.RowsAffected()
+
+	// If an error occurs when extracting the result, it is because the
+	// driver does not support that specific field. Instead of passing this
+	// to the user, omit the field in the response.
+	if errID != nil {
+		insertID = -1
+	}
+	if errRows != nil {
+		rowsAffected = -1
+	}
+
+	return sqlResult{insertID, rowsAffected}
+}

dbconnect/sql_test.go

@@ -0,0 +1,336 @@
+package dbconnect
+
+import (
+	"context"
+	"database/sql"
+	"fmt"
+	"net/url"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/kshvakov/clickhouse"
+	"github.com/lib/pq"
+
+	"github.com/DATA-DOG/go-sqlmock"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewSQLClient(t *testing.T) {
+	originURLs := []string{
+		"postgres://localhost",
+		"cockroachdb://localhost:1337",
+		"postgresql://user:pass@127.0.0.1",
+		"mysql://localhost",
+		"clickhouse://127.0.0.1:9000/?debug",
+		"sqlite3::memory:",
+		"file:test.db?cache=shared",
+	}
+
+	for _, originURL := range originURLs {
+		origin, _ := url.Parse(originURL)
+		_, err := NewSQLClient(context.Background(), origin)
+
+		assert.NoError(t, err, originURL)
+	}
+
+	originURLs = []string{
+		"",
+		"/",
+		"http://localhost",
+		"coolthing://user:pass@127.0.0.1",
+	}
+
+	for _, originURL := range originURLs {
+		origin, _ := url.Parse(originURL)
+		_, err := NewSQLClient(context.Background(), origin)
+
+		assert.Error(t, err, originURL)
+	}
+}
+
+func TestArgumentsSQL(t *testing.T) {
+	args := []Arguments{
+		Arguments{
+			Positional: []interface{}{
+				"val", 10, 3.14,
+			},
+		},
+		Arguments{
+			Named: map[string]interface{}{
+				"key": time.Unix(0, 0),
+			},
+		},
+	}
+
+	var nameType sql.NamedArg
+	for _, arg := range args {
+		arg.sql("")
+		for _, named := range arg.Positional {
+			assert.IsType(t, nameType, named)
+		}
+	}
+}
+
+func TestSQLArg(t *testing.T) {
+	tests := []struct {
+		key     interface{}
+		val     interface{}
+		dialect string
+		arg     sql.NamedArg
+	}{
+		{"key", "val", "mssql", sql.Named("key", "val")},
+		{0, 1, "sqlite3", sql.Named("0", 1)},
+		{1, []string{"a", "b", "c"}, "postgres", sql.Named("1", pq.Array([]string{"a", "b", "c"}))},
+		{"in", []uint{0, 1}, "clickhouse", sql.Named("in", clickhouse.Array([]uint{0, 1}))},
+		{"", time.Unix(0, 0), "", sql.Named("", time.Unix(0, 0))},
+	}
+
+	for _, test := range tests {
+		arg := sqlArg(test.key, test.val, test.dialect)
+		assert.Equal(t, test.arg, arg, test.key)
+	}
+}
+
+func TestSQLIsolation(t *testing.T) {
+	tests := []struct {
+		str string
+		iso sql.IsolationLevel
+	}{
+		{"", sql.LevelDefault},
+		{"DEFAULT", sql.LevelDefault},
+		{"read_UNcommitted", sql.LevelReadUncommitted},
+		{"serializable", sql.LevelSerializable},
+		{"none", sql.IsolationLevel(-1)},
+		{"SNAP shot", -2},
+		{"blah", -2},
+	}
+
+	for _, test := range tests {
+		iso, err := sqlIsolation(test.str)
+
+		if test.iso < -1 {
+			assert.Error(t, err, test.str)
+		} else {
+			assert.NoError(t, err)
+			assert.Equal(t, test.iso, iso, test.str)
+		}
+	}
+}
+
+func TestSQLMode(t *testing.T) {
+	modes := []string{
+		"query",
+		"exec",
+	}
+
+	for _, mode := range modes {
+		actual, err := sqlMode(mode)
+
+		assert.NoError(t, err)
+		assert.Equal(t, strings.ToLower(mode), actual, mode)
+	}
+
+	modes = []string{
+		"",
+		"blah",
+	}
+
+	for _, mode := range modes {
+		_, err := sqlMode(mode)
+
+		assert.Error(t, err)
+	}
+}
+
+func helperRows(mockRows *sqlmock.Rows) *sql.Rows {
+	db, mock, _ := sqlmock.New()
+	mock.ExpectQuery("SELECT").WillReturnRows(mockRows)
+	rows, _ := db.Query("SELECT")
+	return rows
+}
+
+func TestSQLRows(t *testing.T) {
+	actual, err := sqlRows(helperRows(sqlmock.NewRows(
+		[]string{"name", "age", "dept"}).
+		AddRow("alice", 19, "prod")))
+	expected := []map[string]interface{}{map[string]interface{}{
+		"name": "alice",
+		"age":  int64(19),
+		"dept": "prod"}}
+
+	assert.NoError(t, err)
+	assert.ElementsMatch(t, expected, actual)
+}
+
+func TestSQLValue(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		output interface{}
+	}{
+		{"hello", "hello"},
+		{1, 1},
+		{false, false},
+		{[]byte("random"), "random"},
+		{[]byte("{\"json\":true}"), map[string]interface{}{"json": true}},
+		{[]byte("[]"), []interface{}{}},
+	}
+
+	for _, test := range tests {
+		assert.Equal(t, test.output, sqlValue(test.input, nil), test.input)
+	}
+}
+
+func TestSQLResultFrom(t *testing.T) {
+	res := sqlResultFrom(sqlmock.NewResult(1, 2))
+	assert.Equal(t, sqlResult{1, 2}, res)
+
+	res = sqlResultFrom(sqlmock.NewErrorResult(fmt.Errorf("")))
+	assert.Equal(t, sqlResult{-1, -1}, res)
+}
+
+func helperSQLite3(t *testing.T) (context.Context, Client) {
+	t.Helper()
+
+	ctx := context.Background()
+	url, _ := url.Parse("file::memory:?cache=shared")
+
+	sqlite3, err := NewSQLClient(ctx, url)
+	assert.NoError(t, err)
+
+	return ctx, sqlite3
+}
+
+func TestPing(t *testing.T) {
+	ctx, sqlite3 := helperSQLite3(t)
+	err := sqlite3.Ping(ctx)
+
+	assert.NoError(t, err)
+}
+
+func TestSubmit(t *testing.T) {
+	ctx, sqlite3 := helperSQLite3(t)
+
+	res, err := sqlite3.Submit(ctx, &Command{
+		Statement: "CREATE TABLE t (a INTEGER, b FLOAT, c TEXT, d BLOB);",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, sqlResult{0, 0}, res)
+
+	res, err = sqlite3.Submit(ctx, &Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "query",
+	})
+	assert.NoError(t, err)
+	assert.Empty(t, res)
+
+	res, err = sqlite3.Submit(ctx, &Command{
+		Statement: "INSERT INTO t VALUES (?, ?, ?, ?);",
+		Mode:      "exec",
+		Arguments: Arguments{
+			Positional: []interface{}{
+				1,
+				3.14,
+				"text",
+				"blob",
+			},
+		},
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, sqlResult{1, 1}, res)
+
+	res, err = sqlite3.Submit(ctx, &Command{
+		Statement: "UPDATE t SET c = NULL;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, sqlResult{1, 1}, res)
+
+	res, err = sqlite3.Submit(ctx, &Command{
+		Statement: "SELECT * FROM t WHERE a = ?;",
+		Mode:      "query",
+		Arguments: Arguments{
+			Positional: []interface{}{1},
+		},
+	})
+	assert.NoError(t, err)
+	assert.Len(t, res, 1)
+
+	resf, ok := res.([]map[string]interface{})
+	assert.True(t, ok)
+	assert.EqualValues(t, map[string]interface{}{
+		"a": int64(1),
+		"b": 3.14,
+		"c": nil,
+		"d": "blob",
+	}, resf[0])
+
+	res, err = sqlite3.Submit(ctx, &Command{
+		Statement: "DROP TABLE t;",
+		Mode:      "exec",
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, sqlResult{1, 1}, res)
+}
+
+func TestSubmitTransaction(t *testing.T) {
+	ctx, sqlite3 := helperSQLite3(t)
+
+	res, err := sqlite3.Submit(ctx, &Command{
+		Statement: "BEGIN;",
+		Mode:      "exec",
+	})
+	assert.Error(t, err)
+	assert.Empty(t, res)
+
+	res, err = sqlite3.Submit(ctx, &Command{
+		Statement: "BEGIN; CREATE TABLE tt (a INT); COMMIT;",
+		Mode:      "exec",
+		Isolation: "none",
+	})
+	assert.NoError(t, err)
+	assert.Equal(t, sqlResult{0, 0}, res)
+
+	rows, err := sqlite3.Submit(ctx, &Command{
+		Statement: "SELECT * FROM tt;",
+		Mode:      "query",
+		Isolation: "repeatable_read",
+	})
+	assert.NoError(t, err)
+	assert.Empty(t, rows)
+}
+
+func TestSubmitTimeout(t *testing.T) {
+	ctx, sqlite3 := helperSQLite3(t)
+
+	res, err := sqlite3.Submit(ctx, &Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "query",
+		Timeout:   1 * time.Nanosecond,
+	})
+	assert.Error(t, err)
+	assert.Empty(t, res)
+}
+
+func TestSubmitMode(t *testing.T) {
+	ctx, sqlite3 := helperSQLite3(t)
+
+	res, err := sqlite3.Submit(ctx, &Command{
+		Statement: "SELECT * FROM t;",
+		Mode:      "notanoption",
+	})
+	assert.Error(t, err)
+	assert.Empty(t, res)
+}
+
+func TestSubmitEmpty(t *testing.T) {
+	ctx, sqlite3 := helperSQLite3(t)
+
+	res, err := sqlite3.Submit(ctx, &Command{
+		Statement: "; ; ; ;",
+		Mode:      "query",
+	})
+	assert.Error(t, err)
+	assert.Empty(t, res)
+}

dev.Dockerfile

@@ -0,0 +1,4 @@
+FROM golang:1.12 as builder
+WORKDIR /go/src/github.com/cloudflare/cloudflared/
+RUN apt-get update
+COPY . .

h2mux/error.go

@@ -7,6 +7,7 @@ import (
 )
 
 var (
+	// HTTP2 error codes: https://http2.github.io/http2-spec/#ErrorCodes
 	ErrHandshakeTimeout               = MuxerHandshakeError{"1000 handshake timeout"}
 	ErrBadHandshakeNotSettings        = MuxerHandshakeError{"1001 unexpected response"}
 	ErrBadHandshakeUnexpectedAck      = MuxerHandshakeError{"1002 unexpected response"}
@@ -19,9 +20,11 @@ var (
 	ErrUnknownStream       = MuxerProtocolError{"2002 unknown stream", http2.ErrCodeProtocol}
 	ErrInvalidStream       = MuxerProtocolError{"2003 invalid stream", http2.ErrCodeProtocol}
 
-	ErrStreamHeadersSent = MuxerApplicationError{"3000 headers already sent"}
-	ErrConnectionClosed  = MuxerApplicationError{"3001 connection closed"}
-	ErrConnectionDropped = MuxerApplicationError{"3002 connection dropped"}
+	ErrStreamHeadersSent      = MuxerApplicationError{"3000 headers already sent"}
+	ErrConnectionClosed       = MuxerApplicationError{"3001 connection closed"}
+	ErrConnectionDropped      = MuxerApplicationError{"3002 connection dropped"}
+	ErrOpenStreamTimeout      = MuxerApplicationError{"3003 open stream timeout"}
+	ErrResponseHeadersTimeout = MuxerApplicationError{"3004 timeout waiting for initial response headers"}
 
 	ErrClosedStream = MuxerStreamError{"4000 stream closed", http2.ErrCodeStreamClosed}
 )

h2mux/h2mux.go

@@ -15,11 +15,12 @@ import (
 )
 
 const (
-	defaultFrameSize  uint32        = 1 << 14 // Minimum frame size in http2 spec
-	defaultWindowSize uint32        = 65535
-	maxWindowSize     uint32        = (1 << 31) - 1 // 2^31-1 = 2147483647, max window size specified in http2 spec
-	defaultTimeout    time.Duration = 5 * time.Second
-	defaultRetries    uint64        = 5
+	defaultFrameSize         uint32        = 1 << 14       // Minimum frame size in http2 spec
+	defaultWindowSize        uint32        = (1 << 16) - 1 // Minimum window size in http2 spec
+	maxWindowSize            uint32        = (1 << 31) - 1 // 2^31-1 = 2147483647, max window size in http2 spec
+	defaultTimeout           time.Duration = 5 * time.Second
+	defaultRetries           uint64        = 5
+	defaultWriteBufferMaxLen int           = 1024 * 1024 * 512 // 500mb
 
 	SettingMuxerMagic http2.SettingID = 0x42db
 	MuxerMagicOrigin  uint32          = 0xa2e43c8b
@@ -49,6 +50,12 @@ type MuxerConfig struct {
 	// Logger to use
 	Logger             *log.Entry
 	CompressionQuality CompressionSetting
+	// Initial size for HTTP2 flow control windows
+	DefaultWindowSize uint32
+	// Largest allowable size for HTTP2 flow control windows
+	MaxWindowSize uint32
+	// Largest allowable capacity for the buffer of data to be sent
+	StreamWriteBufferMaxLen int
 }
 
 type Muxer struct {
@@ -64,7 +71,7 @@ type Muxer struct {
 	// muxWriter is the write process.
 	muxWriter *MuxWriter
 	// muxMetricsUpdater is the process to update metrics
-	muxMetricsUpdater *muxMetricsUpdater
+	muxMetricsUpdater muxMetricsUpdater
 	// newStreamChan is used to create new streams on the writer thread.
 	// The writer will assign the next available stream ID.
 	newStreamChan chan MuxedStreamRequest
@@ -87,6 +94,14 @@ type Header struct {
 	Name, Value string
 }
 
+func RPCHeaders() []Header {
+	return []Header{
+		{Name: ":method", Value: "RPC"},
+		{Name: ":scheme", Value: "capnp"},
+		{Name: ":path", Value: "*"},
+	}
+}
+
 // Handshake establishes a muxed connection with the peer.
 // After the handshake completes, it is possible to open and accept streams.
 func Handshake(
@@ -98,6 +113,15 @@ func Handshake(
 	if config.Timeout == 0 {
 		config.Timeout = defaultTimeout
 	}
+	if config.DefaultWindowSize == 0 {
+		config.DefaultWindowSize = defaultWindowSize
+	}
+	if config.MaxWindowSize == 0 {
+		config.MaxWindowSize = maxWindowSize
+	}
+	if config.StreamWriteBufferMaxLen == 0 {
+		config.StreamWriteBufferMaxLen = defaultWriteBufferMaxLen
+	}
 	// Initialise connection state fields
 	m := &Muxer{
 		f:             http2.NewFramer(w, r), // A framer that writes to w and reads from r
@@ -147,11 +171,6 @@ func Handshake(
 	// set up reader/writer pair ready for serve
 	streamErrors := NewStreamErrorMap()
 	goAwayChan := make(chan http2.ErrCode, 1)
-	updateRTTChan := make(chan *roundTripMeasurement, 1)
-	updateReceiveWindowChan := make(chan uint32, 1)
-	updateSendWindowChan := make(chan uint32, 1)
-	updateInBoundBytesChan := make(chan uint64)
-	updateOutBoundBytesChan := make(chan uint64)
 	inBoundCounter := NewAtomicCounter(0)
 	outBoundCounter := NewAtomicCounter(0)
 	pingTimestamp := NewPingTimestamp()
@@ -168,6 +187,14 @@ func Handshake(
 		config.Logger.Warn("Minimum number of unacked heartbeats to send before closing the connection has been adjusted to ", maxRetries)
 	}
 
+	compBytesBefore, compBytesAfter := NewAtomicCounter(0), NewAtomicCounter(0)
+
+	m.muxMetricsUpdater = newMuxMetricsUpdater(
+		m.abortChan,
+		compBytesBefore,
+		compBytesAfter,
+	)
+
 	m.explicitShutdown = NewBooleanFuse()
 	m.muxReader = &MuxReader{
 		f:                       m.f,
@@ -179,47 +206,30 @@ func Handshake(
 		abortChan:               m.abortChan,
 		pingTimestamp:           pingTimestamp,
 		connActive:              connActive,
-		initialStreamWindow:     defaultWindowSize,
-		streamWindowMax:         maxWindowSize,
+		initialStreamWindow:     m.config.DefaultWindowSize,
+		streamWindowMax:         m.config.MaxWindowSize,
+		streamWriteBufferMaxLen: m.config.StreamWriteBufferMaxLen,
 		r:                       m.r,
-		updateRTTChan:           updateRTTChan,
-		updateReceiveWindowChan: updateReceiveWindowChan,
-		updateSendWindowChan:    updateSendWindowChan,
+		metricsUpdater:          m.muxMetricsUpdater,
 		bytesRead:               inBoundCounter,
-		updateInBoundBytesChan:  updateInBoundBytesChan,
 	}
 	m.muxWriter = &MuxWriter{
-		f:                       m.f,
-		streams:                 m.streams,
-		streamErrors:            streamErrors,
-		readyStreamChan:         m.readyList.ReadyChannel(),
-		newStreamChan:           m.newStreamChan,
-		goAwayChan:              goAwayChan,
-		abortChan:               m.abortChan,
-		pingTimestamp:           pingTimestamp,
-		idleTimer:               NewIdleTimer(idleDuration, maxRetries),
-		connActiveChan:          connActive.WaitChannel(),
-		maxFrameSize:            defaultFrameSize,
-		updateReceiveWindowChan: updateReceiveWindowChan,
-		updateSendWindowChan:    updateSendWindowChan,
-		bytesWrote:              outBoundCounter,
-		updateOutBoundBytesChan: updateOutBoundBytesChan,
+		f:               m.f,
+		streams:         m.streams,
+		streamErrors:    streamErrors,
+		readyStreamChan: m.readyList.ReadyChannel(),
+		newStreamChan:   m.newStreamChan,
+		goAwayChan:      goAwayChan,
+		abortChan:       m.abortChan,
+		pingTimestamp:   pingTimestamp,
+		idleTimer:       NewIdleTimer(idleDuration, maxRetries),
+		connActiveChan:  connActive.WaitChannel(),
+		maxFrameSize:    defaultFrameSize,
+		metricsUpdater:  m.muxMetricsUpdater,
+		bytesWrote:      outBoundCounter,
 	}
 	m.muxWriter.headerEncoder = hpack.NewEncoder(&m.muxWriter.headerBuffer)
 
-	compBytesBefore, compBytesAfter := NewAtomicCounter(0), NewAtomicCounter(0)
-
-	m.muxMetricsUpdater = newMuxMetricsUpdater(
-		updateRTTChan,
-		updateReceiveWindowChan,
-		updateSendWindowChan,
-		updateInBoundBytesChan,
-		updateOutBoundBytesChan,
-		m.abortChan,
-		compBytesBefore,
-		compBytesAfter,
-	)
-
 	if m.compressionQuality.dictSize > 0 && m.compressionQuality.nDicts > 0 {
 		nd, sz := m.compressionQuality.nDicts, m.compressionQuality.dictSize
 		writeDicts, dictChan := newH2WriteDictionaries(
@@ -305,6 +315,12 @@ func joinErrorsWithTimeout(errChan <-chan error, receiveCount int, timeout time.
 	return nil
 }
 
+// Serve runs the event loops that comprise h2mux:
+// - MuxReader.run()
+// - MuxWriter.run()
+// - muxMetricsUpdater.run()
+// In the normal case, Shutdown() is called concurrently with Serve() to stop
+// these loops.
 func (m *Muxer) Serve(ctx context.Context) error {
 	errGroup, _ := errgroup.WithContext(ctx)
 	errGroup.Go(func() error {
@@ -335,6 +351,7 @@ func (m *Muxer) Serve(ctx context.Context) error {
 	return nil
 }
 
+// Shutdown is called to initiate the "happy path" of muxer termination.
 func (m *Muxer) Shutdown() {
 	m.explicitShutdown.Fuse(true)
 	m.muxReader.Shutdown()
@@ -370,15 +387,17 @@ func isConnectionClosedError(err error) bool {
 
 // OpenStream opens a new data stream with the given headers.
 // Called by proxy server and tunnel
-func (m *Muxer) OpenStream(headers []Header, body io.Reader) (*MuxedStream, error) {
+func (m *Muxer) OpenStream(ctx context.Context, headers []Header, body io.Reader) (*MuxedStream, error) {
 	stream := &MuxedStream{
 		responseHeadersReceived: make(chan struct{}),
 		readBuffer:              NewSharedBuffer(),
 		writeBuffer:             &bytes.Buffer{},
-		receiveWindow:           defaultWindowSize,
-		receiveWindowCurrentMax: defaultWindowSize, // Initial window size limit. exponentially increase it when receiveWindow is exhausted
-		receiveWindowMax:        maxWindowSize,
-		sendWindow:              defaultWindowSize,
+		writeBufferMaxLen:       m.config.StreamWriteBufferMaxLen,
+		writeBufferHasSpace:     make(chan struct{}, 1),
+		receiveWindow:           m.config.DefaultWindowSize,
+		receiveWindowCurrentMax: m.config.DefaultWindowSize,
+		receiveWindowMax:        m.config.MaxWindowSize,
+		sendWindow:              m.config.DefaultWindowSize,
 		readyList:               m.readyList,
 		writeHeaders:            headers,
 		dictionaries:            m.muxReader.dictionaries,
@@ -386,25 +405,66 @@ func (m *Muxer) OpenStream(headers []Header, body io.Reader) (*MuxedStream, erro
 
 	select {
 	// Will be received by mux writer
-	case m.newStreamChan <- MuxedStreamRequest{stream: stream, body: body}:
+	case <-ctx.Done():
+		return nil, ErrOpenStreamTimeout
 	case <-m.abortChan:
 		return nil, ErrConnectionClosed
+	case m.newStreamChan <- MuxedStreamRequest{stream: stream, body: body}:
 	}
+
 	select {
+	case <-ctx.Done():
+		return nil, ErrResponseHeadersTimeout
+	case <-m.abortChan:
+		return nil, ErrConnectionClosed
 	case <-stream.responseHeadersReceived:
 		return stream, nil
+	}
+}
+
+func (m *Muxer) OpenRPCStream(ctx context.Context) (*MuxedStream, error) {
+	stream := &MuxedStream{
+		responseHeadersReceived: make(chan struct{}),
+		readBuffer:              NewSharedBuffer(),
+		writeBuffer:             &bytes.Buffer{},
+		writeBufferMaxLen:       m.config.StreamWriteBufferMaxLen,
+		writeBufferHasSpace:     make(chan struct{}, 1),
+		receiveWindow:           m.config.DefaultWindowSize,
+		receiveWindowCurrentMax: m.config.DefaultWindowSize,
+		receiveWindowMax:        m.config.MaxWindowSize,
+		sendWindow:              m.config.DefaultWindowSize,
+		readyList:               m.readyList,
+		writeHeaders:            RPCHeaders(),
+		dictionaries:            m.muxReader.dictionaries,
+	}
+
+	select {
+	// Will be received by mux writer
+	case <-ctx.Done():
+		return nil, ErrOpenStreamTimeout
 	case <-m.abortChan:
 		return nil, ErrConnectionClosed
+	case m.newStreamChan <- MuxedStreamRequest{stream: stream, body: nil}:
+	}
+
+	select {
+	case <-ctx.Done():
+		return nil, ErrResponseHeadersTimeout
+	case <-m.abortChan:
+		return nil, ErrConnectionClosed
+	case <-stream.responseHeadersReceived:
+		return stream, nil
 	}
 }
 
 func (m *Muxer) Metrics() *MuxerMetrics {
-	return m.muxMetricsUpdater.Metrics()
+	return m.muxMetricsUpdater.metrics()
 }
 
 func (m *Muxer) abort() {
 	m.abortOnce.Do(func() {
 		close(m.abortChan)
+		m.readyList.Close()
 		m.streams.Abort()
 	})
 }

h2mux/h2mux_test.go

@@ -15,7 +15,15 @@ import (
 	"testing"
 	"time"
 
+	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/sync/errgroup"
+)
+
+const (
+	testOpenStreamTimeout = time.Millisecond * 5000
+	testHandshakeTimeout  = time.Millisecond * 1000
 )
 
 func TestMain(m *testing.M) {
@@ -35,86 +43,80 @@ type DefaultMuxerPair struct {
 	doneC           chan struct{}
 }
 
-func NewDefaultMuxerPair() *DefaultMuxerPair {
+func NewDefaultMuxerPair(t assert.TestingT, f MuxedStreamFunc) *DefaultMuxerPair {
 	origin, edge := net.Pipe()
-	return &DefaultMuxerPair{
+	p := &DefaultMuxerPair{
 		OriginMuxConfig: MuxerConfig{
-			Timeout: time.Second,
-			IsClient: true,
-			Name: "origin",
-			Logger: log.NewEntry(log.New()),
+			Timeout:                 testHandshakeTimeout,
+			Handler:                 f,
+			IsClient:                true,
+			Name:                    "origin",
+			Logger:                  log.NewEntry(log.New()),
+			DefaultWindowSize:       (1 << 8) - 1,
+			MaxWindowSize:           (1 << 15) - 1,
+			StreamWriteBufferMaxLen: 1024,
 		},
-		OriginConn:      origin,
-		EdgeMuxConfig:   MuxerConfig{
-			Timeout: time.Second,
-			IsClient: false,
-			Name: "edge",
-			Logger: log.NewEntry(log.New()),
+		OriginConn: origin,
+		EdgeMuxConfig: MuxerConfig{
+			Timeout:                 testHandshakeTimeout,
+			IsClient:                false,
+			Name:                    "edge",
+			Logger:                  log.NewEntry(log.New()),
+			DefaultWindowSize:       (1 << 8) - 1,
+			MaxWindowSize:           (1 << 15) - 1,
+			StreamWriteBufferMaxLen: 1024,
 		},
-		EdgeConn:        edge,
-		doneC:           make(chan struct{}),
+		EdgeConn: edge,
+		doneC:    make(chan struct{}),
 	}
+	assert.NoError(t, p.Handshake())
+	return p
 }
 
-func NewCompressedMuxerPair(quality CompressionSetting) *DefaultMuxerPair {
+func NewCompressedMuxerPair(t assert.TestingT, quality CompressionSetting, f MuxedStreamFunc) *DefaultMuxerPair {
 	origin, edge := net.Pipe()
-	return &DefaultMuxerPair{
+	p := &DefaultMuxerPair{
 		OriginMuxConfig: MuxerConfig{
-			Timeout: time.Second,
-			IsClient: true,
-			Name: "origin",
+			Timeout:            time.Second,
+			Handler:            f,
+			IsClient:           true,
+			Name:               "origin",
 			CompressionQuality: quality,
-			Logger: log.NewEntry(log.New()),
+			Logger:             log.NewEntry(log.New()),
 		},
-		OriginConn:      origin,
-		EdgeMuxConfig:   MuxerConfig{
-			Timeout: time.Second,
-			IsClient: false,
-			Name: "edge",
+		OriginConn: origin,
+		EdgeMuxConfig: MuxerConfig{
+			Timeout:            time.Second,
+			IsClient:           false,
+			Name:               "edge",
 			CompressionQuality: quality,
-			Logger: log.NewEntry(log.New()),
+			Logger:             log.NewEntry(log.New()),
 		},
-		EdgeConn:        edge,
-		doneC:           make(chan struct{}),
+		EdgeConn: edge,
+		doneC:    make(chan struct{}),
 	}
+	assert.NoError(t, p.Handshake())
+	return p
 }
 
-func (p *DefaultMuxerPair) Handshake(t *testing.T) {
-	edgeErrC := make(chan error)
-	originErrC := make(chan error)
-	go func() {
-		var err error
+func (p *DefaultMuxerPair) Handshake() error {
+	ctx, cancel := context.WithTimeout(context.Background(), testHandshakeTimeout)
+	defer cancel()
+	errGroup, _ := errgroup.WithContext(ctx)
+	errGroup.Go(func() (err error) {
 		p.EdgeMux, err = Handshake(p.EdgeConn, p.EdgeConn, p.EdgeMuxConfig)
-		edgeErrC <- err
-	}()
-	go func() {
-		var err error
+		return errors.Wrap(err, "edge handshake failure")
+	})
+	errGroup.Go(func() (err error) {
 		p.OriginMux, err = Handshake(p.OriginConn, p.OriginConn, p.OriginMuxConfig)
-		originErrC <- err
-	}()
+		return errors.Wrap(err, "origin handshake failure")
+	})
 
-	select {
-	case err := <-edgeErrC:
-		if err != nil {
-			t.Fatalf("edge handshake failure: %s", err)
-		}
-	case <-time.After(time.Second * 5):
-		t.Fatalf("edge handshake timeout")
-	}
-
-	select {
-	case err := <-originErrC:
-		if err != nil {
-			t.Fatalf("origin handshake failure: %s", err)
-		}
-	case <-time.After(time.Second * 5):
-		t.Fatalf("origin handshake timeout")
-	}
+	return errGroup.Wait()
 }
 
-func (p *DefaultMuxerPair) HandshakeAndServe(t *testing.T) {
+func (p *DefaultMuxerPair) Serve(t assert.TestingT) {
 	ctx := context.Background()
-	p.Handshake(t)
 	var wg sync.WaitGroup
 	wg.Add(2)
 	go func() {
@@ -149,18 +151,23 @@ func (p *DefaultMuxerPair) Wait(t *testing.T) {
 	}
 }
 
+func (p *DefaultMuxerPair) OpenEdgeMuxStream(headers []Header, body io.Reader) (*MuxedStream, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), testOpenStreamTimeout)
+	defer cancel()
+	return p.EdgeMux.OpenStream(ctx, headers, body)
+}
+
 func TestHandshake(t *testing.T) {
-	muxPair := NewDefaultMuxerPair()
-	muxPair.Handshake(t)
+	f := func(stream *MuxedStream) error {
+		return nil
+	}
+	muxPair := NewDefaultMuxerPair(t, f)
 	AssertIfPipeReadable(t, muxPair.OriginConn)
 	AssertIfPipeReadable(t, muxPair.EdgeConn)
 }
 
 func TestSingleStream(t *testing.T) {
-	closeC := make(chan struct{})
-	muxPair := NewDefaultMuxerPair()
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
-		defer close(closeC)
+	f := MuxedStreamFunc(func(stream *MuxedStream) error {
 		if len(stream.Headers) != 1 {
 			t.Fatalf("expected %d headers, got %d", 1, len(stream.Headers))
 		}
@@ -175,8 +182,6 @@ func TestSingleStream(t *testing.T) {
 		})
 		buf := []byte("Hello world")
 		stream.Write(buf)
-		// after this receive, the edge closed the stream
-		<-closeC
 		n, err := io.ReadFull(stream, buf)
 		if n > 0 {
 			t.Fatalf("read %d bytes after EOF", n)
@@ -186,9 +191,10 @@ func TestSingleStream(t *testing.T) {
 		}
 		return nil
 	})
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, f)
+	muxPair.Serve(t)
 
-	stream, err := muxPair.EdgeMux.OpenStream(
+	stream, err := muxPair.OpenEdgeMuxStream(
 		[]Header{{Name: "test-header", Value: "headerValue"}},
 		nil,
 	)
@@ -216,7 +222,6 @@ func TestSingleStream(t *testing.T) {
 		t.Fatalf("expected response body %s, got %s", "Hello world", responseBody)
 	}
 	stream.Close()
-	closeC <- struct{}{}
 	n, err = stream.Write([]byte("aaaaa"))
 	if n > 0 {
 		t.Fatalf("wrote %d bytes after EOF", n)
@@ -224,14 +229,11 @@ func TestSingleStream(t *testing.T) {
 	if err != io.EOF {
 		t.Fatalf("expected EOF, got %s", err)
 	}
-	<-closeC
 }
 
 func TestSingleStreamLargeResponseBody(t *testing.T) {
-	muxPair := NewDefaultMuxerPair()
 	bodySize := 1 << 24
-	streamReady := make(chan struct{})
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
+	f := MuxedStreamFunc(func(stream *MuxedStream) error {
 		if len(stream.Headers) != 1 {
 			t.Fatalf("expected %d headers, got %d", 1, len(stream.Headers))
 		}
@@ -257,14 +259,13 @@ func TestSingleStreamLargeResponseBody(t *testing.T) {
 		if n != len(payload) {
 			t.Fatalf("origin short write: %d/%d bytes", n, len(payload))
 		}
-		t.Log("Payload written; signaling that the stream is ready")
-		streamReady <- struct{}{}
 
 		return nil
 	})
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, f)
+	muxPair.Serve(t)
 
-	stream, err := muxPair.EdgeMux.OpenStream(
+	stream, err := muxPair.OpenEdgeMuxStream(
 		[]Header{{Name: "test-header", Value: "headerValue"}},
 		nil,
 	)
@@ -282,9 +283,6 @@ func TestSingleStreamLargeResponseBody(t *testing.T) {
 	}
 	responseBody := make([]byte, bodySize)
 
-	<-streamReady
-	t.Log("Received stream ready signal; resuming the test")
-
 	n, err := io.ReadFull(stream, responseBody)
 	if err != nil {
 		t.Fatalf("error from (*MuxedStream).Read: %s", err)
@@ -295,10 +293,7 @@ func TestSingleStreamLargeResponseBody(t *testing.T) {
 }
 
 func TestMultipleStreams(t *testing.T) {
-	muxPair := NewDefaultMuxerPair()
-	maxStreams := 64
-	errorsC := make(chan error, maxStreams)
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
+	f := MuxedStreamFunc(func(stream *MuxedStream) error {
 		if len(stream.Headers) != 1 {
 			t.Fatalf("expected %d headers, got %d", 1, len(stream.Headers))
 		}
@@ -314,15 +309,18 @@ func TestMultipleStreams(t *testing.T) {
 		log.Debugf("Wrote body for stream %s", stream.Headers[0].Value)
 		return nil
 	})
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, f)
+	muxPair.Serve(t)
 
+	maxStreams := 64
+	errorsC := make(chan error, maxStreams)
 	var wg sync.WaitGroup
 	wg.Add(maxStreams)
 	for i := 0; i < maxStreams; i++ {
 		go func(tokenId int) {
 			defer wg.Done()
 			tokenString := fmt.Sprintf("%d", tokenId)
-			stream, err := muxPair.EdgeMux.OpenStream(
+			stream, err := muxPair.OpenEdgeMuxStream(
 				[]Header{{Name: "client-token", Value: tokenString}},
 				nil,
 			)
@@ -367,20 +365,18 @@ func TestMultipleStreams(t *testing.T) {
 		log.Error(err)
 	}
 	if testFail {
-		t.Fatalf("TestMultipleStreamsFlowControl failed")
+		t.Fatalf("TestMultipleStreams failed")
 	}
 }
 
 func TestMultipleStreamsFlowControl(t *testing.T) {
 	maxStreams := 32
-	errorsC := make(chan error, maxStreams)
-	streamReady := make(chan struct{})
 	responseSizes := make([]int32, maxStreams)
 	for i := 0; i < maxStreams; i++ {
 		responseSizes[i] = rand.Int31n(int32(defaultWindowSize << 4))
 	}
-	muxPair := NewDefaultMuxerPair()
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
+
+	f := MuxedStreamFunc(func(stream *MuxedStream) error {
 		if len(stream.Headers) != 1 {
 			t.Fatalf("expected %d headers, got %d", 1, len(stream.Headers))
 		}
@@ -398,7 +394,6 @@ func TestMultipleStreamsFlowControl(t *testing.T) {
 			payload[i] = byte(i % 256)
 		}
 		n, err := stream.Write(payload)
-		streamReady <- struct{}{}
 		if err != nil {
 			t.Fatalf("origin write error: %s", err)
 		}
@@ -407,64 +402,48 @@ func TestMultipleStreamsFlowControl(t *testing.T) {
 		}
 		return nil
 	})
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, f)
+	muxPair.Serve(t)
 
-	var wg sync.WaitGroup
-	wg.Add(maxStreams)
+	errGroup, _ := errgroup.WithContext(context.Background())
 	for i := 0; i < maxStreams; i++ {
-		go func(tokenId int) {
-			defer wg.Done()
-			stream, err := muxPair.EdgeMux.OpenStream(
+		errGroup.Go(func() error {
+			stream, err := muxPair.OpenEdgeMuxStream(
 				[]Header{{Name: "test-header", Value: "headerValue"}},
 				nil,
 			)
 			if err != nil {
-				errorsC <- fmt.Errorf("stream %d error in OpenStream: %s", stream.streamID, err)
-				return
+				return fmt.Errorf("error in OpenStream: %d %s", stream.streamID, err)
 			}
 			if len(stream.Headers) != 1 {
-				errorsC <- fmt.Errorf("stream %d expected %d headers, got %d", stream.streamID, 1, len(stream.Headers))
-				return
+				return fmt.Errorf("stream %d expected %d headers, got %d", stream.streamID, 1, len(stream.Headers))
 			}
 			if stream.Headers[0].Name != "response-header" {
-				errorsC <- fmt.Errorf("stream %d expected header name %s, got %s", stream.streamID, "response-header", stream.Headers[0].Name)
-				return
+				return fmt.Errorf("stream %d expected header name %s, got %s", stream.streamID, "response-header", stream.Headers[0].Name)
 			}
 			if stream.Headers[0].Value != "responseValue" {
-				errorsC <- fmt.Errorf("stream %d expected header value %s, got %s", stream.streamID, "responseValue", stream.Headers[0].Value)
-				return
+				return fmt.Errorf("stream %d expected header value %s, got %s", stream.streamID, "responseValue", stream.Headers[0].Value)
 			}
 
-			<-streamReady
 			responseBody := make([]byte, responseSizes[(stream.streamID-2)/2])
 			n, err := io.ReadFull(stream, responseBody)
 			if err != nil {
-				errorsC <- fmt.Errorf("stream %d error from (*MuxedStream).Read: %s", stream.streamID, err)
-				return
+				return fmt.Errorf("stream %d error from (*MuxedStream).Read: %s", stream.streamID, err)
 			}
 			if n != len(responseBody) {
-				errorsC <- fmt.Errorf("stream %d expected response body to have %d bytes, got %d", stream.streamID, len(responseBody), n)
-				return
+				return fmt.Errorf("stream %d expected response body to have %d bytes, got %d", stream.streamID, len(responseBody), n)
 			}
-		}(i)
-	}
-	wg.Wait()
-	close(errorsC)
-	testFail := false
-	for err := range errorsC {
-		testFail = true
-		log.Error(err)
-	}
-	if testFail {
-		t.Fatalf("TestMultipleStreamsFlowControl failed")
+			return nil
+		})
 	}
+	assert.NoError(t, errGroup.Wait())
 }
 
 func TestGracefulShutdown(t *testing.T) {
 	sendC := make(chan struct{})
 	responseBuf := bytes.Repeat([]byte("Hello world"), 65536)
-	muxPair := NewDefaultMuxerPair()
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
+
+	f := MuxedStreamFunc(func(stream *MuxedStream) error {
 		stream.WriteHeaders([]Header{
 			{Name: "response-header", Value: "responseValue"},
 		})
@@ -482,18 +461,19 @@ func TestGracefulShutdown(t *testing.T) {
 		log.Debugf("Handler ends")
 		return nil
 	})
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, f)
+	muxPair.Serve(t)
 
-	stream, err := muxPair.EdgeMux.OpenStream(
+	stream, err := muxPair.OpenEdgeMuxStream(
 		[]Header{{Name: "test-header", Value: "headerValue"}},
 		nil,
 	)
-	// Start graceful shutdown of the edge mux - this should also close the origin mux when done
-	muxPair.EdgeMux.Shutdown()
-	close(sendC)
 	if err != nil {
 		t.Fatalf("error in OpenStream: %s", err)
 	}
+	// Start graceful shutdown of the edge mux - this should also close the origin mux when done
+	muxPair.EdgeMux.Shutdown()
+	close(sendC)
 	responseBody := make([]byte, len(responseBuf))
 	log.Debugf("Waiting for %d bytes", len(responseBuf))
 	n, err := io.ReadFull(stream, responseBody)
@@ -514,8 +494,8 @@ func TestUnexpectedShutdown(t *testing.T) {
 	sendC := make(chan struct{})
 	handlerFinishC := make(chan struct{})
 	responseBuf := bytes.Repeat([]byte("Hello world"), 65536)
-	muxPair := NewDefaultMuxerPair()
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
+
+	f := MuxedStreamFunc(func(stream *MuxedStream) error {
 		defer close(handlerFinishC)
 		stream.WriteHeaders([]Header{
 			{Name: "response-header", Value: "responseValue"},
@@ -536,9 +516,10 @@ func TestUnexpectedShutdown(t *testing.T) {
 		}
 		return nil
 	})
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, f)
+	muxPair.Serve(t)
 
-	stream, err := muxPair.EdgeMux.OpenStream(
+	stream, err := muxPair.OpenEdgeMuxStream(
 		[]Header{{Name: "test-header", Value: "headerValue"}},
 		nil,
 	)
@@ -583,9 +564,8 @@ func EchoHandler(stream *MuxedStream) error {
 
 func TestOpenAfterDisconnect(t *testing.T) {
 	for i := 0; i < 3; i++ {
-		muxPair := NewDefaultMuxerPair()
-		muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(EchoHandler)
-		muxPair.HandshakeAndServe(t)
+		muxPair := NewDefaultMuxerPair(t, EchoHandler)
+		muxPair.Serve(t)
 
 		switch i {
 		case 0:
@@ -600,7 +580,7 @@ func TestOpenAfterDisconnect(t *testing.T) {
 			muxPair.EdgeConn.Close()
 		}
 
-		_, err := muxPair.EdgeMux.OpenStream(
+		_, err := muxPair.OpenEdgeMuxStream(
 			[]Header{{Name: "test-header", Value: "headerValue"}},
 			nil,
 		)
@@ -611,11 +591,10 @@ func TestOpenAfterDisconnect(t *testing.T) {
 }
 
 func TestHPACK(t *testing.T) {
-	muxPair := NewDefaultMuxerPair()
-	muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(EchoHandler)
-	muxPair.HandshakeAndServe(t)
+	muxPair := NewDefaultMuxerPair(t, EchoHandler)
+	muxPair.Serve(t)
 
-	stream, err := muxPair.EdgeMux.OpenStream(
+	stream, err := muxPair.OpenEdgeMuxStream(
 		[]Header{
 			{Name: ":method", Value: "RPC"},
 			{Name: ":scheme", Value: "capnp"},
@@ -629,7 +608,7 @@ func TestHPACK(t *testing.T) {
 	stream.Close()
 
 	for i := 0; i < 3; i++ {
-		stream, err := muxPair.EdgeMux.OpenStream(
+		stream, err := muxPair.OpenEdgeMuxStream(
 			[]Header{
 				{Name: ":method", Value: "GET"},
 				{Name: ":scheme", Value: "https"},
@@ -691,8 +670,6 @@ func AssertIfPipeReadable(t *testing.T, pipe io.ReadCloser) {
 func TestMultipleStreamsWithDictionaries(t *testing.T) {
 
 	for q := CompressionNone; q <= CompressionMax; q++ {
-		muxPair := NewCompressedMuxerPair(q)
-
 		htmlBody := `<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"` +
 			`"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">` +
 			`<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">` +
@@ -715,7 +692,7 @@ func TestMultipleStreamsWithDictionaries(t *testing.T) {
 			`</body>` +
 			`</html>`
 
-		muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(func(stream *MuxedStream) error {
+		f := MuxedStreamFunc(func(stream *MuxedStream) error {
 			var contentType string
 			var pathHeader Header
 
@@ -747,8 +724,8 @@ func TestMultipleStreamsWithDictionaries(t *testing.T) {
 
 			return nil
 		})
-
-		muxPair.HandshakeAndServe(t)
+		muxPair := NewCompressedMuxerPair(t, q, f)
+		muxPair.Serve(t)
 
 		var wg sync.WaitGroup
 
@@ -782,88 +759,105 @@ func TestMultipleStreamsWithDictionaries(t *testing.T) {
 		}
 
 		wg.Add(len(paths))
+		errorsC := make(chan error, len(paths))
 
 		for i, s := range paths {
-			go func(i int, path string) {
-				stream, err := muxPair.EdgeMux.OpenStream(
+			go func(index int, path string) {
+				defer wg.Done()
+				stream, err := muxPair.OpenEdgeMuxStream(
 					[]Header{
 						{Name: ":method", Value: "GET"},
 						{Name: ":scheme", Value: "https"},
 						{Name: ":authority", Value: "tunnel.otterlyadorable.co.uk"},
 						{Name: ":path", Value: path},
 						{Name: "cf-ray", Value: "378948953f044408-SFO-DOG"},
-						{Name: "idx", Value: strconv.Itoa(i)},
+						{Name: "idx", Value: strconv.Itoa(index)},
 						{Name: "accept-encoding", Value: "gzip, br"},
 					},
 					nil,
 				)
 				if err != nil {
-					t.Fatalf("error in OpenStream: %s", err)
+					errorsC <- fmt.Errorf("error in OpenStream: %v", err)
+					return
 				}
 
-				expectBody := strings.Replace(htmlBody, "paragraph", path, 1) + strconv.Itoa(i)
+				expectBody := strings.Replace(htmlBody, "paragraph", path, 1) + strconv.Itoa(index)
 				responseBody := make([]byte, len(expectBody)*2)
 				n, err := stream.Read(responseBody)
 				if err != nil {
-					log.Printf("error from (*MuxedStream).Read: %s", err)
-					t.Fatalf("error from (*MuxedStream).Read: %s", err)
+					errorsC <- fmt.Errorf("stream %d error from (*MuxedStream).Read: %s", stream.streamID, err)
+					return
 				}
 				if n != len(expectBody) {
-					log.Printf("expected response body to have %d bytes, got %d", len(expectBody), n)
-					t.Fatalf("expected response body to have %d bytes, got %d", len(expectBody), n)
+					errorsC <- fmt.Errorf("stream %d expected response body to have %d bytes, got %d", stream.streamID, len(expectBody), n)
+					return
 				}
 				if string(responseBody[:n]) != expectBody {
-					log.Printf("expected response body %s, got %s", expectBody, responseBody[:n])
-					t.Fatalf("expected response body %s, got %s", expectBody, responseBody[:n])
+					errorsC <- fmt.Errorf("stream %d expected response body %s, got %s", stream.streamID, expectBody, responseBody[:n])
+					return
 				}
-				wg.Done()
 			}(i, s)
-			time.Sleep(1 * time.Millisecond)
 		}
-		wg.Wait()
 
-		if q > CompressionNone && muxPair.OriginMux.muxMetricsUpdater.compBytesBefore.Value() <= 10*muxPair.OriginMux.muxMetricsUpdater.compBytesAfter.Value() {
+		wg.Wait()
+		close(errorsC)
+		testFail := false
+		for err := range errorsC {
+			testFail = true
+			log.Error(err)
+		}
+		if testFail {
+			t.Fatalf("TestMultipleStreams failed")
+		}
+
+		originMuxMetrics := muxPair.OriginMux.Metrics()
+		if q > CompressionNone && originMuxMetrics.CompBytesBefore.Value() <= 10*originMuxMetrics.CompBytesAfter.Value() {
 			t.Fatalf("Cross-stream compression is expected to give a better compression ratio")
 		}
 	}
 }
 
-func sampleSiteHandler(stream *MuxedStream) error {
-	var contentType string
-	var pathHeader Header
+func sampleSiteHandler(files map[string][]byte) MuxedStreamFunc {
+	return func(stream *MuxedStream) error {
+		var contentType string
+		var pathHeader Header
 
-	for _, h := range stream.Headers {
-		if h.Name == ":path" {
-			pathHeader = h
-			break
+		for _, h := range stream.Headers {
+			if h.Name == ":path" {
+				pathHeader = h
+				break
+			}
 		}
-	}
 
-	if pathHeader.Name != ":path" {
-		panic("Couldn't find :path header in test")
-	}
+		if pathHeader.Name != ":path" {
+			return fmt.Errorf("Couldn't find :path header in test")
+		}
 
-	if strings.Contains(pathHeader.Value, "html") {
-		contentType = "text/html; charset=utf-8"
-	} else if strings.Contains(pathHeader.Value, "js") {
-		contentType = "application/javascript"
-	} else if strings.Contains(pathHeader.Value, "css") {
-		contentType = "text/css"
-	} else {
-		contentType = "img/gif"
+		if strings.Contains(pathHeader.Value, "html") {
+			contentType = "text/html; charset=utf-8"
+		} else if strings.Contains(pathHeader.Value, "js") {
+			contentType = "application/javascript"
+		} else if strings.Contains(pathHeader.Value, "css") {
+			contentType = "text/css"
+		} else {
+			contentType = "img/gif"
+		}
+		stream.WriteHeaders([]Header{
+			Header{Name: "content-type", Value: contentType},
+		})
+		log.Debugf("Wrote headers for stream %s", pathHeader.Value)
+		file, ok := files[pathHeader.Value]
+		if !ok {
+			return fmt.Errorf("%s content is not preloaded", pathHeader.Value)
+		}
+		stream.Write(file)
+		log.Debugf("Wrote body for stream %s", pathHeader.Value)
+		return nil
 	}
-	stream.WriteHeaders([]Header{
-		Header{Name: "content-type", Value: contentType},
-	})
-	log.Debugf("Wrote headers for stream %s", pathHeader.Value)
-	b, _ := ioutil.ReadFile("./sample" + pathHeader.Value)
-	stream.Write(b)
-	log.Debugf("Wrote body for stream %s", pathHeader.Value)
-	return nil
 }
 
-func sampleSiteTest(t *testing.T, muxPair *DefaultMuxerPair, path string) {
-	stream, err := muxPair.EdgeMux.OpenStream(
+func sampleSiteTest(muxPair *DefaultMuxerPair, path string, files map[string][]byte) error {
+	stream, err := muxPair.OpenEdgeMuxStream(
 		[]Header{
 			{Name: ":method", Value: "GET"},
 			{Name: ":scheme", Value: "https"},
@@ -875,86 +869,152 @@ func sampleSiteTest(t *testing.T, muxPair *DefaultMuxerPair, path string) {
 		nil,
 	)
 	if err != nil {
-		t.Fatalf("error in OpenStream: %s", err)
+		return fmt.Errorf("error in OpenStream: %v", err)
 	}
-	expectBody, _ := ioutil.ReadFile("./sample" + path)
-	responseBody := make([]byte, len(expectBody))
+	file, ok := files[path]
+	if !ok {
+		return fmt.Errorf("%s content is not preloaded", path)
+	}
+	responseBody := make([]byte, len(file))
 	n, err := io.ReadFull(stream, responseBody)
-	log.Debugf("Got body for stream %s", path)
 	if err != nil {
-		t.Fatalf("error from (*MuxedStream).Read: %s", err)
+		return fmt.Errorf("error from (*MuxedStream).Read: %v", err)
 	}
-	if n != len(expectBody) {
-		t.Fatalf("expected response body to have %d bytes, got %d", len(expectBody), n)
+	if n != len(file) {
+		return fmt.Errorf("expected response body to have %d bytes, got %d", len(file), n)
 	}
-	if string(responseBody[:n]) != string(expectBody) {
-		t.Fatalf("expected response body %s, got %s", expectBody, responseBody[:n])
+	if string(responseBody[:n]) != string(file) {
+		return fmt.Errorf("expected response body %s, got %s", file, responseBody[:n])
 	}
+	return nil
+}
+
+func loadSampleFiles(paths []string) (map[string][]byte, error) {
+	files := make(map[string][]byte)
+	for _, path := range paths {
+		if _, ok := files[path]; !ok {
+			expectBody, err := ioutil.ReadFile(path)
+			if err != nil {
+				return nil, err
+			}
+			files[path] = expectBody
+		}
+	}
+	return files, nil
 }
 
 func TestSampleSiteWithDictionaries(t *testing.T) {
+	paths := []string{
+		"./sample/index.html",
+		"./sample/index2.html",
+		"./sample/index1.html",
+		"./sample/ghost-url.min.js",
+		"./sample/jquery.fitvids.js",
+		"./sample/index1.html",
+		"./sample/index2.html",
+		"./sample/index.html",
+	}
+	files, err := loadSampleFiles(paths)
+	assert.NoError(t, err)
+
 	for q := CompressionNone; q <= CompressionMax; q++ {
-		muxPair := NewCompressedMuxerPair(q)
-		muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(sampleSiteHandler)
-		muxPair.HandshakeAndServe(t)
+		muxPair := NewCompressedMuxerPair(t, q, sampleSiteHandler(files))
+		muxPair.Serve(t)
 
 		var wg sync.WaitGroup
-
-		paths := []string{
-			"/index.html",
-			"/index2.html",
-			"/index1.html",
-			"/ghost-url.min.js",
-			"/jquery.fitvids.js",
-			"/index1.html",
-			"/index2.html",
-			"/index.html",
-		}
+		errC := make(chan error, len(paths))
 
 		wg.Add(len(paths))
 		for _, s := range paths {
 			go func(path string) {
-				sampleSiteTest(t, muxPair, path)
-				wg.Done()
+				defer wg.Done()
+				errC <- sampleSiteTest(muxPair, path, files)
 			}(s)
 		}
-		wg.Wait()
 
-		if q > CompressionNone && muxPair.OriginMux.muxMetricsUpdater.compBytesBefore.Value() <= 10*muxPair.OriginMux.muxMetricsUpdater.compBytesAfter.Value() {
+		wg.Wait()
+		close(errC)
+
+		for err := range errC {
+			assert.NoError(t, err)
+		}
+
+		originMuxMetrics := muxPair.OriginMux.Metrics()
+		if q > CompressionNone && originMuxMetrics.CompBytesBefore.Value() <= 10*originMuxMetrics.CompBytesAfter.Value() {
 			t.Fatalf("Cross-stream compression is expected to give a better compression ratio")
 		}
 	}
 }
 
 func TestLongSiteWithDictionaries(t *testing.T) {
+	paths := []string{
+		"./sample/index.html",
+		"./sample/index1.html",
+		"./sample/index2.html",
+		"./sample/ghost-url.min.js",
+		"./sample/jquery.fitvids.js",
+	}
+	files, err := loadSampleFiles(paths)
+	assert.NoError(t, err)
 	for q := CompressionNone; q <= CompressionMedium; q++ {
-		muxPair := NewCompressedMuxerPair(q)
-		muxPair.OriginMuxConfig.Handler = MuxedStreamFunc(sampleSiteHandler)
-		muxPair.HandshakeAndServe(t)
+		muxPair := NewCompressedMuxerPair(t, q, sampleSiteHandler(files))
+		muxPair.Serve(t)
 
-		var wg sync.WaitGroup
 		rand.Seed(time.Now().Unix())
 
-		paths := []string{
-			"/index.html",
-			"/index1.html",
-			"/index2.html",
-			"/ghost-url.min.js",
-			"/jquery.fitvids.js"}
-
-		tstLen := 1000
-		wg.Add(tstLen)
+		tstLen := 500
+		errGroup, _ := errgroup.WithContext(context.Background())
 		for i := 0; i < tstLen; i++ {
-			path := paths[rand.Int()%len(paths)]
-			go func(path string) {
-				sampleSiteTest(t, muxPair, path)
-				wg.Done()
-			}(path)
+			errGroup.Go(func() error {
+				path := paths[rand.Int()%len(paths)]
+				return sampleSiteTest(muxPair, path, files)
+			})
 		}
-		wg.Wait()
+		assert.NoError(t, errGroup.Wait())
 
-		if q > CompressionNone && muxPair.OriginMux.muxMetricsUpdater.compBytesBefore.Value() <= 100*muxPair.OriginMux.muxMetricsUpdater.compBytesAfter.Value() {
+		originMuxMetrics := muxPair.OriginMux.Metrics()
+		if q > CompressionNone && originMuxMetrics.CompBytesBefore.Value() <= 10*originMuxMetrics.CompBytesAfter.Value() {
 			t.Fatalf("Cross-stream compression is expected to give a better compression ratio")
 		}
 	}
 }
+
+func BenchmarkOpenStream(b *testing.B) {
+	const streams = 5000
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		f := MuxedStreamFunc(func(stream *MuxedStream) error {
+			if len(stream.Headers) != 1 {
+				b.Fatalf("expected %d headers, got %d", 1, len(stream.Headers))
+			}
+			if stream.Headers[0].Name != "test-header" {
+				b.Fatalf("expected header name %s, got %s", "test-header", stream.Headers[0].Name)
+			}
+			if stream.Headers[0].Value != "headerValue" {
+				b.Fatalf("expected header value %s, got %s", "headerValue", stream.Headers[0].Value)
+			}
+			stream.WriteHeaders([]Header{
+				{Name: "response-header", Value: "responseValue"},
+			})
+			return nil
+		})
+		muxPair := NewDefaultMuxerPair(b, f)
+		muxPair.Serve(b)
+		b.StartTimer()
+		openStreams(b, muxPair, streams)
+	}
+}
+
+func openStreams(b *testing.B, muxPair *DefaultMuxerPair, n int) {
+	errGroup, _ := errgroup.WithContext(context.Background())
+	for i := 0; i < n; i++ {
+		errGroup.Go(func() error {
+			_, err := muxPair.OpenEdgeMuxStream(
+				[]Header{{Name: "test-header", Value: "headerValue"}},
+				nil,
+			)
+			return err
+		})
+	}
+	assert.NoError(b, errGroup.Wait())
+}

h2mux/muxedstream.go

@@ -17,73 +17,126 @@ type ReadWriteClosedCloser interface {
 	Closed() bool
 }
 
+// MuxedStream is logically an HTTP/2 stream, with an additional buffer for outgoing data.
 type MuxedStream struct {
-	Headers []Header
-
 	streamID uint32
 
+	// The "Receive" end of the stream
+	readBufferLock sync.RWMutex
+	readBuffer     ReadWriteClosedCloser
+	// This is the amount of bytes that are in our receive window
+	// (how much data we can receive into this stream).
+	receiveWindow uint32
+	// current receive window size limit. Exponentially increase it when it's exhausted
+	receiveWindowCurrentMax uint32
+	// hard limit set in http2 spec. 2^31-1
+	receiveWindowMax uint32
+	// The desired size increment for receiveWindow.
+	// If this is nonzero, a WINDOW_UPDATE frame needs to be sent.
+	windowUpdate uint32
+	// The headers that were most recently received.
+	// Particularly:
+	//     * for an eyeball-initiated stream (as passed to TunnelHandler::ServeStream),
+	//       these are the request headers
+	//     * for a cloudflared-initiated stream (as created by Register/UnregisterTunnel),
+	//       these are the response headers.
+	// They are useful in both of these contexts; hence `Headers` is public.
+	Headers []Header
+	// For use in the context of a cloudflared-initiated stream.
 	responseHeadersReceived chan struct{}
 
-	readBuffer    ReadWriteClosedCloser
-	receiveWindow uint32
-	// current window size limit. Exponentially increase it when it's exhausted
-	receiveWindowCurrentMax uint32
-	// limit set in http2 spec. 2^31-1
-	receiveWindowMax uint32
-
-	// nonzero if a WINDOW_UPDATE frame for a stream needs to be sent
-	windowUpdate uint32
-
-	writeLock sync.Mutex
-	// The zero value for Buffer is an empty buffer ready to use.
+	// The "Send" end of the stream
+	writeLock   sync.Mutex
 	writeBuffer ReadWriteLengther
-
+	// The maximum capacity that the send buffer should grow to.
+	writeBufferMaxLen int
+	// A channel to be notified when the send buffer is not full.
+	writeBufferHasSpace chan struct{}
+	// This is the amount of bytes that are in the peer's receive window
+	// (how much data we can send from this stream).
 	sendWindow uint32
-
-	readyList    *ReadyList
+	// Reference to the muxer's readyList; signal this for stream data to be sent.
+	readyList *ReadyList
+	// The headers that should be sent, and a flag so we only send them once.
 	headersSent  bool
 	writeHeaders []Header
+
+	// EOF-related fields
 	// true if the write end of this stream has been closed
 	writeEOF bool
 	// true if we have sent EOF to the peer
 	sentEOF bool
 	// true if the peer sent us an EOF
 	receivedEOF bool
-
-	// dictionary that was used to compress the stream
+	// If valid, tunnelHostname is used to identify which origin service is the intended recipient of the request
+	tunnelHostname TunnelHostname
+	// Compression-related fields
 	receivedUseDict bool
 	method          string
 	contentType     string
 	path            string
 	dictionaries    h2Dictionaries
-	readBufferLock  sync.RWMutex
+}
+
+type TunnelHostname string
+
+func (th TunnelHostname) String() string {
+	return string(th)
+}
+
+func (th TunnelHostname) IsSet() bool {
+	return th != ""
 }
 
 func (s *MuxedStream) Read(p []byte) (n int, err error) {
+	var readBuffer ReadWriteClosedCloser
 	if s.dictionaries.read != nil {
 		s.readBufferLock.RLock()
-		b := s.readBuffer
+		readBuffer = s.readBuffer
 		s.readBufferLock.RUnlock()
-		return b.Read(p)
+	} else {
+		readBuffer = s.readBuffer
 	}
-	return s.readBuffer.Read(p)
+	n, err = readBuffer.Read(p)
+	s.replenishReceiveWindow(uint32(n))
+	return
 }
 
-func (s *MuxedStream) Write(p []byte) (n int, err error) {
+// Blocks until len(p) bytes have been written to the buffer
+func (s *MuxedStream) Write(p []byte) (int, error) {
+	// If assignDictToStream returns success, then it will have acquired the
+	// writeLock. Otherwise we must acquire it ourselves.
 	ok := assignDictToStream(s, p)
 	if !ok {
 		s.writeLock.Lock()
 	}
 	defer s.writeLock.Unlock()
+
 	if s.writeEOF {
 		return 0, io.EOF
 	}
-	n, err = s.writeBuffer.Write(p)
-	if n != len(p) || err != nil {
-		return n, err
+	totalWritten := 0
+	for totalWritten < len(p) {
+		// If the buffer is full, block till there is more room.
+		// Use a loop to recheck the buffer size after the lock is reacquired.
+		for s.writeBufferMaxLen <= s.writeBuffer.Len() {
+			s.writeLock.Unlock()
+			<-s.writeBufferHasSpace
+			s.writeLock.Lock()
+		}
+		amountToWrite := len(p) - totalWritten
+		spaceAvailable := s.writeBufferMaxLen - s.writeBuffer.Len()
+		if spaceAvailable < amountToWrite {
+			amountToWrite = spaceAvailable
+		}
+		amountWritten, err := s.writeBuffer.Write(p[totalWritten : totalWritten+amountToWrite])
+		totalWritten += amountWritten
+		if err != nil {
+			return totalWritten, err
+		}
+		s.writeNotify()
 	}
-	s.writeNotify()
-	return n, nil
+	return totalWritten, nil
 }
 
 func (s *MuxedStream) Close() error {
@@ -143,6 +196,25 @@ func (s *MuxedStream) WriteHeaders(headers []Header) error {
 	return nil
 }
 
+// IsRPCStream returns if the stream is used to transport RPC.
+func (s *MuxedStream) IsRPCStream() bool {
+	rpcHeaders := RPCHeaders()
+	if len(s.Headers) != len(rpcHeaders) {
+		return false
+	}
+	// The headers order matters, so RPC stream should be opened with OpenRPCStream method and let MuxWriter serializes the headers.
+	for i, rpcHeader := range rpcHeaders {
+		if s.Headers[i] != rpcHeader {
+			return false
+		}
+	}
+	return true
+}
+
+func (s *MuxedStream) TunnelHostname() TunnelHostname {
+	return s.tunnelHostname
+}
+
 func (s *MuxedStream) getReceiveWindow() uint32 {
 	s.writeLock.Lock()
 	defer s.writeLock.Unlock()
@@ -164,9 +236,9 @@ func (s *MuxedStream) writeNotify() {
 // receive window (how much data we can send).
 func (s *MuxedStream) replenishSendWindow(bytes uint32) {
 	s.writeLock.Lock()
+	defer s.writeLock.Unlock()
 	s.sendWindow += bytes
 	s.writeNotify()
-	s.writeLock.Unlock()
 }
 
 // Call by muxreader when it receives a data frame
@@ -178,17 +250,30 @@ func (s *MuxedStream) consumeReceiveWindow(bytes uint32) bool {
 		return false
 	}
 	s.receiveWindow -= bytes
-	if s.receiveWindow < s.receiveWindowCurrentMax/2 {
+	if s.receiveWindow < s.receiveWindowCurrentMax/2 && s.receiveWindowCurrentMax < s.receiveWindowMax {
 		// exhausting client send window (how much data client can send)
-		if s.receiveWindowCurrentMax < s.receiveWindowMax {
-			s.receiveWindowCurrentMax <<= 1
+		// and there is room to grow the receive window
+		newMax := s.receiveWindowCurrentMax << 1
+		if newMax > s.receiveWindowMax {
+			newMax = s.receiveWindowMax
 		}
-		s.windowUpdate += s.receiveWindowCurrentMax - s.receiveWindow
+		s.windowUpdate += newMax - s.receiveWindowCurrentMax
+		s.receiveWindowCurrentMax = newMax
+		// notify MuxWriter to write WINDOW_UPDATE frame
 		s.writeNotify()
 	}
 	return true
 }
 
+// Arranges for the MuxWriter to send a WINDOW_UPDATE
+// Called by MuxedStream::Read when data has left the read buffer.
+func (s *MuxedStream) replenishReceiveWindow(bytes uint32) {
+	s.writeLock.Lock()
+	defer s.writeLock.Unlock()
+	s.windowUpdate += bytes
+	s.writeNotify()
+}
+
 // receiveEOF should be called when the peer indicates no more data will be sent.
 // Returns true if the socket is now closed (i.e. the write side is already closed).
 func (s *MuxedStream) receiveEOF() (closed bool) {
@@ -226,7 +311,8 @@ type streamChunk struct {
 	// true if a HEADERS frame should be sent
 	sendHeaders bool
 	headers     []Header
-	// nonzero if a WINDOW_UPDATE frame should be sent
+	// nonzero if a WINDOW_UPDATE frame should be sent;
+	// in that case, it is the increment value to use
 	windowUpdate uint32
 	// true if data frames should be sent
 	sendData bool
@@ -249,11 +335,23 @@ func (s *MuxedStream) getChunk() *streamChunk {
 		eof:          s.writeEOF && uint32(s.writeBuffer.Len()) <= s.sendWindow,
 	}
 
-	// Copies at most s.sendWindow bytes
+	// Copy at most s.sendWindow bytes, adjust the sendWindow accordingly
 	writeLen, _ := io.CopyN(&chunk.buffer, s.writeBuffer, int64(s.sendWindow))
 	s.sendWindow -= uint32(writeLen)
+
+	// Non-blocking channel send. This will allow MuxedStream::Write() to continue, if needed
+	if s.writeBuffer.Len() < s.writeBufferMaxLen {
+		select {
+		case s.writeBufferHasSpace <- struct{}{}:
+		default:
+		}
+	}
+
+	// When we write the chunk, we'll write the WINDOW_UPDATE frame if needed
 	s.receiveWindow += s.windowUpdate
 	s.windowUpdate = 0
+
+	// When we write the chunk, we'll write the headers if needed
 	s.headersSent = true
 
 	// if this chunk contains the end of the stream, close the stream now

h2mux/muxedstream_test.go

@@ -23,47 +23,55 @@ func TestFlowControlSingleStream(t *testing.T) {
 		sendWindow:              testWindowSize,
 		readyList:               NewReadyList(),
 	}
+	var tempWindowUpdate uint32
+	var tempStreamChunk *streamChunk
+
 	assert.True(t, stream.consumeReceiveWindow(testWindowSize/2))
 	dataSent := testWindowSize / 2
 	assert.Equal(t, testWindowSize-dataSent, stream.receiveWindow)
 	assert.Equal(t, testWindowSize, stream.receiveWindowCurrentMax)
-	assert.Equal(t, uint32(0), stream.windowUpdate)
-	tempWindowUpdate := stream.windowUpdate
-
-	streamChunk := stream.getChunk()
-	assert.Equal(t, tempWindowUpdate, streamChunk.windowUpdate)
-	assert.Equal(t, testWindowSize-dataSent, stream.receiveWindow)
-	assert.Equal(t, uint32(0), stream.windowUpdate)
 	assert.Equal(t, testWindowSize, stream.sendWindow)
+	assert.Equal(t, uint32(0), stream.windowUpdate)
+
+	tempStreamChunk = stream.getChunk()
+	assert.Equal(t, uint32(0), tempStreamChunk.windowUpdate)
+	assert.Equal(t, testWindowSize-dataSent, stream.receiveWindow)
+	assert.Equal(t, testWindowSize, stream.receiveWindowCurrentMax)
+	assert.Equal(t, testWindowSize, stream.sendWindow)
+	assert.Equal(t, uint32(0), stream.windowUpdate)
 
 	assert.True(t, stream.consumeReceiveWindow(2))
 	dataSent += 2
 	assert.Equal(t, testWindowSize-dataSent, stream.receiveWindow)
 	assert.Equal(t, testWindowSize<<1, stream.receiveWindowCurrentMax)
-	assert.Equal(t, (testWindowSize<<1)-stream.receiveWindow, stream.windowUpdate)
+	assert.Equal(t, testWindowSize, stream.sendWindow)
+	assert.Equal(t, testWindowSize, stream.windowUpdate)
 	tempWindowUpdate = stream.windowUpdate
 
-	streamChunk = stream.getChunk()
-	assert.Equal(t, tempWindowUpdate, streamChunk.windowUpdate)
-	assert.Equal(t, testWindowSize<<1, stream.receiveWindow)
-	assert.Equal(t, uint32(0), stream.windowUpdate)
+	tempStreamChunk = stream.getChunk()
+	assert.Equal(t, tempWindowUpdate, tempStreamChunk.windowUpdate)
+	assert.Equal(t, (testWindowSize<<1)-dataSent, stream.receiveWindow)
+	assert.Equal(t, testWindowSize<<1, stream.receiveWindowCurrentMax)
 	assert.Equal(t, testWindowSize, stream.sendWindow)
+	assert.Equal(t, uint32(0), stream.windowUpdate)
 
 	assert.True(t, stream.consumeReceiveWindow(testWindowSize+10))
-	dataSent = testWindowSize + 10
+	dataSent += testWindowSize + 10
 	assert.Equal(t, (testWindowSize<<1)-dataSent, stream.receiveWindow)
 	assert.Equal(t, testWindowSize<<2, stream.receiveWindowCurrentMax)
-	assert.Equal(t, (testWindowSize<<2)-stream.receiveWindow, stream.windowUpdate)
+	assert.Equal(t, testWindowSize, stream.sendWindow)
+	assert.Equal(t, testWindowSize<<1, stream.windowUpdate)
 	tempWindowUpdate = stream.windowUpdate
 
-	streamChunk = stream.getChunk()
-	assert.Equal(t, tempWindowUpdate, streamChunk.windowUpdate)
-	assert.Equal(t, testWindowSize<<2, stream.receiveWindow)
-	assert.Equal(t, uint32(0), stream.windowUpdate)
+	tempStreamChunk = stream.getChunk()
+	assert.Equal(t, tempWindowUpdate, tempStreamChunk.windowUpdate)
+	assert.Equal(t, (testWindowSize<<2)-dataSent, stream.receiveWindow)
+	assert.Equal(t, testWindowSize<<2, stream.receiveWindowCurrentMax)
 	assert.Equal(t, testWindowSize, stream.sendWindow)
+	assert.Equal(t, uint32(0), stream.windowUpdate)
 
 	assert.False(t, stream.consumeReceiveWindow(testMaxWindowSize+1))
-	assert.Equal(t, testWindowSize<<2, stream.receiveWindow)
+	assert.Equal(t, (testWindowSize<<2)-dataSent, stream.receiveWindow)
 	assert.Equal(t, testMaxWindowSize, stream.receiveWindowCurrentMax)
 }
 
@@ -90,3 +98,30 @@ func TestMuxedStreamEOF(t *testing.T) {
 		assert.Equal(t, 0, n)
 	}
 }
+
+func TestIsRPCStream(t *testing.T) {
+	tests := []struct {
+		stream      *MuxedStream
+		isRPCStream bool
+	}{
+		{
+			stream:      &MuxedStream{},
+			isRPCStream: false,
+		},
+		{
+			stream:      &MuxedStream{Headers: RPCHeaders()},
+			isRPCStream: true,
+		},
+		{
+			stream: &MuxedStream{Headers: []Header{
+				{Name: ":method", Value: "rpc"},
+				{Name: ":scheme", Value: "Capnp"},
+				{Name: ":path", Value: "/"},
+			}},
+			isRPCStream: false,
+		},
+	}
+	for _, test := range tests {
+		assert.Equal(t, test.isRPCStream, test.stream.IsRPCStream())
+	}
+}

h2mux/muxmetrics.go

@@ -17,7 +17,24 @@ const (
 	updateFreq = time.Second
 )
 
-type muxMetricsUpdater struct {
+type muxMetricsUpdater interface {
+	// metrics returns the latest metrics
+	metrics() *MuxerMetrics
+	// run is a blocking call to start the event loop
+	run(logger *log.Entry) error
+	// updateRTTChan is called by muxReader to report new RTT measurements
+	updateRTT(rtt *roundTripMeasurement)
+	//updateReceiveWindowChan is called by muxReader and muxWriter when receiveWindow size is updated
+	updateReceiveWindow(receiveWindow uint32)
+	//updateSendWindowChan is called by muxReader and muxWriter when sendWindow size is updated
+	updateSendWindow(sendWindow uint32)
+	// updateInBoundBytesChan is called  periodicallyby muxReader to report bytesRead
+	updateInBoundBytes(inBoundBytes uint64)
+	// updateOutBoundBytesChan is called periodically by muxWriter to report bytesWrote
+	updateOutBoundBytes(outBoundBytes uint64)
+}
+
+type muxMetricsUpdaterImpl struct {
 	// rttData keeps record of rtt, rttMin, rttMax and last measured time
 	rttData *rttData
 	// receiveWindowData keeps record of receive window measurement
@@ -28,16 +45,16 @@ type muxMetricsUpdater struct {
 	inBoundRate *rate
 	// outBoundRate is outgoing bytes/sec
 	outBoundRate *rate
-	// updateRTTChan is the channel to receive new RTT measurement from muxReader
-	updateRTTChan <-chan *roundTripMeasurement
-	//updateReceiveWindowChan is the channel to receive updated receiveWindow size from muxReader and muxWriter
-	updateReceiveWindowChan <-chan uint32
-	//updateSendWindowChan is the channel to receive updated sendWindow size from muxReader and muxWriter
-	updateSendWindowChan <-chan uint32
-	// updateInBoundBytesChan us the channel to receive bytesRead from muxReader
-	updateInBoundBytesChan <-chan uint64
-	// updateOutBoundBytesChan us the channel to receive bytesWrote from muxWriter
-	updateOutBoundBytesChan <-chan uint64
+	// updateRTTChan is the channel to receive new RTT measurement
+	updateRTTChan chan *roundTripMeasurement
+	//updateReceiveWindowChan is the channel to receive updated receiveWindow size
+	updateReceiveWindowChan chan uint32
+	//updateSendWindowChan is the channel to receive updated sendWindow size
+	updateSendWindowChan chan uint32
+	// updateInBoundBytesChan us the channel to receive bytesRead
+	updateInBoundBytesChan chan uint64
+	// updateOutBoundBytesChan us the channel to receive bytesWrote
+	updateOutBoundBytesChan chan uint64
 	// shutdownC is to signal the muxerMetricsUpdater to shutdown
 	abortChan <-chan struct{}
 
@@ -84,15 +101,16 @@ type rate struct {
 }
 
 func newMuxMetricsUpdater(
-	updateRTTChan <-chan *roundTripMeasurement,
-	updateReceiveWindowChan <-chan uint32,
-	updateSendWindowChan <-chan uint32,
-	updateInBoundBytesChan <-chan uint64,
-	updateOutBoundBytesChan <-chan uint64,
 	abortChan <-chan struct{},
 	compBytesBefore, compBytesAfter *AtomicCounter,
-) *muxMetricsUpdater {
-	return &muxMetricsUpdater{
+) muxMetricsUpdater {
+	updateRTTChan := make(chan *roundTripMeasurement, 1)
+	updateReceiveWindowChan := make(chan uint32, 1)
+	updateSendWindowChan := make(chan uint32, 1)
+	updateInBoundBytesChan := make(chan uint64)
+	updateOutBoundBytesChan := make(chan uint64)
+
+	return &muxMetricsUpdaterImpl{
 		rttData:                 newRTTData(),
 		receiveWindowData:       newFlowControlData(),
 		sendWindowData:          newFlowControlData(),
@@ -109,7 +127,7 @@ func newMuxMetricsUpdater(
 	}
 }
 
-func (updater *muxMetricsUpdater) Metrics() *MuxerMetrics {
+func (updater *muxMetricsUpdaterImpl) metrics() *MuxerMetrics {
 	m := &MuxerMetrics{}
 	m.RTT, m.RTTMin, m.RTTMax = updater.rttData.metrics()
 	m.ReceiveWindowAve, m.ReceiveWindowMin, m.ReceiveWindowMax = updater.receiveWindowData.metrics()
@@ -120,7 +138,7 @@ func (updater *muxMetricsUpdater) Metrics() *MuxerMetrics {
 	return m
 }
 
-func (updater *muxMetricsUpdater) run(parentLogger *log.Entry) error {
+func (updater *muxMetricsUpdaterImpl) run(parentLogger *log.Entry) error {
 	logger := parentLogger.WithFields(log.Fields{
 		"subsystem": "mux",
 		"dir":       "metrics",
@@ -152,6 +170,43 @@ func (updater *muxMetricsUpdater) run(parentLogger *log.Entry) error {
 	}
 }
 
+func (updater *muxMetricsUpdaterImpl) updateRTT(rtt *roundTripMeasurement) {
+	select {
+	case updater.updateRTTChan <- rtt:
+	case <-updater.abortChan:
+	}
+
+}
+
+func (updater *muxMetricsUpdaterImpl) updateReceiveWindow(receiveWindow uint32) {
+	select {
+	case updater.updateReceiveWindowChan <- receiveWindow:
+	case <-updater.abortChan:
+	}
+}
+
+func (updater *muxMetricsUpdaterImpl) updateSendWindow(sendWindow uint32) {
+	select {
+	case updater.updateSendWindowChan <- sendWindow:
+	case <-updater.abortChan:
+	}
+}
+
+func (updater *muxMetricsUpdaterImpl) updateInBoundBytes(inBoundBytes uint64) {
+	select {
+	case updater.updateInBoundBytesChan <- inBoundBytes:
+	case <-updater.abortChan:
+	}
+
+}
+
+func (updater *muxMetricsUpdaterImpl) updateOutBoundBytes(outBoundBytes uint64) {
+	select {
+	case updater.updateOutBoundBytesChan <- outBoundBytes:
+	case <-updater.abortChan:
+	}
+}
+
 func newRTTData() *rttData {
 	return &rttData{}
 }

h2mux/muxmetrics_test.go

@@ -86,24 +86,11 @@ func TestFlowControlDataUpdate(t *testing.T) {
 }
 
 func TestMuxMetricsUpdater(t *testing.T) {
-	t.Skip("Race condition")
-	updateRTTChan := make(chan *roundTripMeasurement)
-	updateReceiveWindowChan := make(chan uint32)
-	updateSendWindowChan := make(chan uint32)
-	updateInBoundBytesChan := make(chan uint64)
-	updateOutBoundBytesChan := make(chan uint64)
-	abortChan := make(chan struct{})
+	t.Skip("Inherently racy test due to muxMetricsUpdaterImpl.run()")
 	errChan := make(chan error)
+	abortChan := make(chan struct{})
 	compBefore, compAfter := NewAtomicCounter(0), NewAtomicCounter(0)
-	m := newMuxMetricsUpdater(updateRTTChan,
-		updateReceiveWindowChan,
-		updateSendWindowChan,
-		updateInBoundBytesChan,
-		updateOutBoundBytesChan,
-		abortChan,
-		compBefore,
-		compAfter,
-	)
+	m := newMuxMetricsUpdater(abortChan, compBefore, compAfter)
 	logger := log.NewEntry(log.New())
 
 	go func() {
@@ -116,42 +103,44 @@ func TestMuxMetricsUpdater(t *testing.T) {
 	// mock muxReader
 	readerStart := time.Now()
 	rm := &roundTripMeasurement{receiveTime: readerStart, sendTime: readerStart}
-	updateRTTChan <- rm
+	m.updateRTT(rm)
 	go func() {
 		defer wg.Done()
-		// Becareful if dataPoints is not divisibile by 4
+		assert.Equal(t, 0, dataPoints%4,
+			"dataPoints is not divisible by 4; this test should be adjusted accordingly")
 		readerSend := readerStart.Add(time.Millisecond)
 		for i := 1; i <= dataPoints/4; i++ {
 			readerReceive := readerSend.Add(time.Duration(i) * time.Millisecond)
 			rm := &roundTripMeasurement{receiveTime: readerReceive, sendTime: readerSend}
-			updateRTTChan <- rm
+			m.updateRTT(rm)
 			readerSend = readerReceive.Add(time.Millisecond)
+			m.updateReceiveWindow(uint32(i))
+			m.updateSendWindow(uint32(i))
 
-			updateReceiveWindowChan <- uint32(i)
-			updateSendWindowChan <- uint32(i)
-
-			updateInBoundBytesChan <- uint64(i)
+			m.updateInBoundBytes(uint64(i))
 		}
 	}()
 
 	// mock muxWriter
 	go func() {
 		defer wg.Done()
+		assert.Equal(t, 0, dataPoints%4,
+			"dataPoints is not divisible by 4; this test should be adjusted accordingly")
 		for j := dataPoints/4 + 1; j <= dataPoints/2; j++ {
-			updateReceiveWindowChan <- uint32(j)
-			updateSendWindowChan <- uint32(j)
+			m.updateReceiveWindow(uint32(j))
+			m.updateSendWindow(uint32(j))
 
-			// should always be disgard since the send time is before readerSend
+			// should always be disgarded since the send time is before readerSend
 			rm := &roundTripMeasurement{receiveTime: readerStart, sendTime: readerStart.Add(-time.Duration(j*dataPoints) * time.Millisecond)}
-			updateRTTChan <- rm
+			m.updateRTT(rm)
 
-			updateOutBoundBytesChan <- uint64(j)
+			m.updateOutBoundBytes(uint64(j))
 		}
 
 	}()
 	wg.Wait()
 
-	metrics := m.Metrics()
+	metrics := m.metrics()
 	points := dataPoints / 2
 	assert.Equal(t, time.Millisecond, metrics.RTTMin)
 	assert.Equal(t, time.Duration(dataPoints/4)*time.Millisecond, metrics.RTTMax)

h2mux/muxreader.go

@@ -11,6 +11,10 @@ import (
 	"golang.org/x/net/http2"
 )
 
+const (
+	CloudflaredProxyTunnelHostnameHeader = "cf-cloudflared-proxy-tunnel-hostname"
+)
+
 type MuxReader struct {
 	// f is used to read HTTP2 frames.
 	f *http2.Framer
@@ -35,18 +39,14 @@ type MuxReader struct {
 	initialStreamWindow uint32
 	// The max value for the send window of a stream.
 	streamWindowMax uint32
+	// The max size for the write buffer of a stream
+	streamWriteBufferMaxLen int
 	// r is a reference to the underlying connection used when shutting down.
 	r io.Closer
-	// updateRTTChan is the channel to send new RTT measurement to muxerMetricsUpdater
-	updateRTTChan chan<- *roundTripMeasurement
-	// updateReceiveWindowChan is the channel to update receiveWindow size to muxerMetricsUpdater
-	updateReceiveWindowChan chan<- uint32
-	// updateSendWindowChan is the channel to update sendWindow size to muxerMetricsUpdater
-	updateSendWindowChan chan<- uint32
-	// bytesRead is the amount of bytes read from data frame since the last time we send bytes read to metrics
+	// metricsUpdater is used to report metrics
+	metricsUpdater muxMetricsUpdater
+	// bytesRead is the amount of bytes read from data frames since the last time we called metricsUpdater.updateInBoundBytes()
 	bytesRead *AtomicCounter
-	// updateOutBoundBytesChan is the channel to send bytesWrote to muxerMetricsUpdater
-	updateInBoundBytesChan chan<- uint64
 	// dictionaries holds the h2 cross-stream compression dictionaries
 	dictionaries h2Dictionaries
 }
@@ -79,7 +79,7 @@ func (r *MuxReader) run(parentLogger *log.Entry) error {
 			case <-r.abortChan:
 				return
 			case <-tickC:
-				r.updateInBoundBytesChan <- r.bytesRead.Count()
+				r.metricsUpdater.updateInBoundBytes(r.bytesRead.Count())
 			}
 		}
 	}()
@@ -153,6 +153,8 @@ func (r *MuxReader) newMuxedStream(streamID uint32) *MuxedStream {
 		streamID:                streamID,
 		readBuffer:              NewSharedBuffer(),
 		writeBuffer:             &bytes.Buffer{},
+		writeBufferMaxLen:       r.streamWriteBufferMaxLen,
+		writeBufferHasSpace:     make(chan struct{}, 1),
 		receiveWindow:           r.initialStreamWindow,
 		receiveWindowCurrentMax: r.initialStreamWindow,
 		receiveWindowMax:        r.streamWindowMax,
@@ -237,6 +239,8 @@ func (r *MuxReader) receiveHeaderData(frame *http2.MetaHeadersFrame) error {
 			if r.dictionaries.write != nil {
 				continue
 			}
+		case CloudflaredProxyTunnelHostnameHeader:
+			stream.tunnelHostname = TunnelHostname(header.Value)
 		}
 		headers = append(headers, Header{Name: header.Name, Value: header.Value})
 	}
@@ -285,7 +289,7 @@ func (r *MuxReader) receiveFrameData(frame *http2.DataFrame, parentLogger *log.E
 	if !stream.consumeReceiveWindow(uint32(len(data))) {
 		return r.streamError(stream.streamID, http2.ErrCodeFlowControl)
 	}
-	r.updateReceiveWindowChan <- stream.getReceiveWindow()
+	r.metricsUpdater.updateReceiveWindow(stream.getReceiveWindow())
 	return nil
 }
 
@@ -297,13 +301,13 @@ func (r *MuxReader) receivePingData(frame *http2.PingFrame) {
 		return
 	}
 
-	// Update updates the computed values with a new measurement.
-	// outgoingTime is the time that the probe was sent.
-	// We assume that time.Now() is the time we received that probe.
-	r.updateRTTChan <- &roundTripMeasurement{
+	// Update the computed RTT aggregations with a new measurement.
+	// `ts` is the time that the probe was sent.
+	// We assume that `time.Now()` is the time we received that probe.
+	r.metricsUpdater.updateRTT(&roundTripMeasurement{
 		receiveTime: time.Now(),
 		sendTime:    time.Unix(0, ts),
-	}
+	})
 }
 
 // Receive a GOAWAY from the peer. Gracefully shut down our connection.
@@ -464,7 +468,7 @@ func (r *MuxReader) updateStreamWindow(frame *http2.WindowUpdateFrame) error {
 		return nil
 	}
 	stream.replenishSendWindow(frame.Increment)
-	r.updateSendWindowChan <- stream.getSendWindow()
+	r.metricsUpdater.updateSendWindow(stream.getSendWindow())
 	return nil
 }
 

h2mux/muxreader_test.go

@@ -0,0 +1,107 @@
+package h2mux
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+var (
+	methodHeader = Header{
+		Name:  ":method",
+		Value: "GET",
+	}
+	schemeHeader = Header{
+		Name:  ":scheme",
+		Value: "https",
+	}
+	pathHeader = Header{
+		Name:  ":path",
+		Value: "/api/tunnels",
+	}
+	tunnelHostnameHeader = Header{
+		Name:  CloudflaredProxyTunnelHostnameHeader,
+		Value: "tunnel.example.com",
+	}
+	respStatusHeader = Header{
+		Name:  ":status",
+		Value: "200",
+	}
+)
+
+type mockOriginStreamHandler struct {
+	stream *MuxedStream
+}
+
+func (mosh *mockOriginStreamHandler) ServeStream(stream *MuxedStream) error {
+	mosh.stream = stream
+	// Echo tunnel hostname in header
+	stream.WriteHeaders([]Header{respStatusHeader})
+	return nil
+}
+
+func getCloudflaredProxyTunnelHostnameHeader(stream *MuxedStream) string {
+	for _, header := range stream.Headers {
+		if header.Name == CloudflaredProxyTunnelHostnameHeader {
+			return header.Value
+		}
+	}
+	return ""
+}
+
+func assertOpenStreamSucceed(t *testing.T, stream *MuxedStream, err error) {
+	assert.NoError(t, err)
+	assert.Len(t, stream.Headers, 1)
+	assert.Equal(t, respStatusHeader, stream.Headers[0])
+}
+
+func TestMissingHeaders(t *testing.T) {
+	originHandler := &mockOriginStreamHandler{}
+	muxPair := NewDefaultMuxerPair(t, originHandler.ServeStream)
+	muxPair.Serve(t)
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	reqHeaders := []Header{
+		{
+			Name:  "content-type",
+			Value: "application/json",
+		},
+	}
+
+	// Request doesn't contain CloudflaredProxyTunnelHostnameHeader
+	stream, err := muxPair.EdgeMux.OpenStream(ctx, reqHeaders, nil)
+	assertOpenStreamSucceed(t, stream, err)
+
+	assert.Empty(t, originHandler.stream.method)
+	assert.Empty(t, originHandler.stream.path)
+	assert.False(t, originHandler.stream.TunnelHostname().IsSet())
+}
+
+func TestReceiveHeaderData(t *testing.T) {
+	originHandler := &mockOriginStreamHandler{}
+	muxPair := NewDefaultMuxerPair(t, originHandler.ServeStream)
+	muxPair.Serve(t)
+
+	reqHeaders := []Header{
+		methodHeader,
+		schemeHeader,
+		pathHeader,
+		tunnelHostnameHeader,
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	defer cancel()
+
+	reqHeaders = append(reqHeaders, tunnelHostnameHeader)
+	stream, err := muxPair.EdgeMux.OpenStream(ctx, reqHeaders, nil)
+	assertOpenStreamSucceed(t, stream, err)
+
+	assert.Equal(t, methodHeader.Value, originHandler.stream.method)
+	assert.Equal(t, pathHeader.Value, originHandler.stream.path)
+	assert.True(t, originHandler.stream.TunnelHostname().IsSet())
+	assert.Equal(t, tunnelHostnameHeader.Value, originHandler.stream.TunnelHostname().String())
+}

h2mux/muxwriter.go

@@ -40,14 +40,11 @@ type MuxWriter struct {
 	headerEncoder *hpack.Encoder
 	// headerBuffer is the temporary buffer used by headerEncoder.
 	headerBuffer bytes.Buffer
-	// updateReceiveWindowChan is the channel to update receiveWindow size to muxerMetricsUpdater
-	updateReceiveWindowChan chan<- uint32
-	// updateSendWindowChan is the channel to update sendWindow size to muxerMetricsUpdater
-	updateSendWindowChan chan<- uint32
-	// bytesWrote is the amount of bytes wrote to data frame since the last time we send bytes wrote to metrics
+
+	// metricsUpdater is used to report metrics
+	metricsUpdater muxMetricsUpdater
+	// bytesWrote is the amount of bytes written to data frames since the last time we called metricsUpdater.updateOutBoundBytes()
 	bytesWrote *AtomicCounter
-	// updateOutBoundBytesChan is the channel to send bytesWrote to muxerMetricsUpdater
-	updateOutBoundBytesChan chan<- uint64
 
 	useDictChan <-chan useDictRequest
 }
@@ -83,7 +80,7 @@ func (w *MuxWriter) run(parentLogger *log.Entry) error {
 			case <-w.abortChan:
 				return
 			case <-tickC:
-				w.updateOutBoundBytesChan <- w.bytesWrote.Count()
+				w.metricsUpdater.updateOutBoundBytes(w.bytesWrote.Count())
 			}
 		}
 	}()
@@ -172,8 +169,8 @@ func (w *MuxWriter) run(parentLogger *log.Entry) error {
 func (w *MuxWriter) writeStreamData(stream *MuxedStream, logger *log.Entry) error {
 	logger.Debug("writable")
 	chunk := stream.getChunk()
-	w.updateReceiveWindowChan <- stream.getReceiveWindow()
-	w.updateSendWindowChan <- stream.getSendWindow()
+	w.metricsUpdater.updateReceiveWindow(stream.getReceiveWindow())
+	w.metricsUpdater.updateSendWindow(stream.getSendWindow())
 	if chunk.sendHeadersFrame() {
 		err := w.writeHeaders(chunk.streamID, chunk.headers)
 		if err != nil {

h2mux/readylist.go

@@ -1,15 +1,23 @@
 package h2mux
 
+import "sync"
+
 // ReadyList multiplexes several event signals onto a single channel.
 type ReadyList struct {
+	// signalC is used to signal that a stream can be enqueued
 	signalC chan uint32
-	waitC   chan uint32
+	// waitC is used to signal the ID of the first ready descriptor
+	waitC chan uint32
+	// doneC is used to signal that run should terminate
+	doneC     chan struct{}
+	closeOnce sync.Once
 }
 
 func NewReadyList() *ReadyList {
 	rl := &ReadyList{
 		signalC: make(chan uint32),
 		waitC:   make(chan uint32),
+		doneC:   make(chan struct{}),
 	}
 	go rl.run()
 	return rl
@@ -17,7 +25,11 @@ func NewReadyList() *ReadyList {
 
 // ID is the stream ID
 func (r *ReadyList) Signal(ID uint32) {
-	r.signalC <- ID
+	select {
+	case r.signalC <- ID:
+	// ReadyList already closed
+	case <-r.doneC:
+	}
 }
 
 func (r *ReadyList) ReadyChannel() <-chan uint32 {
@@ -25,7 +37,9 @@ func (r *ReadyList) ReadyChannel() <-chan uint32 {
 }
 
 func (r *ReadyList) Close() {
-	close(r.signalC)
+	r.closeOnce.Do(func() {
+		close(r.doneC)
+	})
 }
 
 func (r *ReadyList) run() {
@@ -35,28 +49,25 @@ func (r *ReadyList) run() {
 	activeDescriptors := newReadyDescriptorMap()
 	for {
 		if firstReady == nil {
-			// Wait for first ready descriptor
-			i, ok := <-r.signalC
-			if !ok {
-				// closed
+			select {
+			case i := <-r.signalC:
+				firstReady = activeDescriptors.SetIfMissing(i)
+			case <-r.doneC:
 				return
 			}
-			firstReady = activeDescriptors.SetIfMissing(i)
 		}
 		select {
 		case r.waitC <- firstReady.ID:
 			activeDescriptors.Delete(firstReady.ID)
 			firstReady = queue.Dequeue()
-		case i, ok := <-r.signalC:
-			if !ok {
-				// closed
-				return
-			}
+		case i := <-r.signalC:
 			newReady := activeDescriptors.SetIfMissing(i)
 			if newReady != nil {
 				// key doesn't exist
 				queue.Enqueue(newReady)
 			}
+		case <-r.doneC:
+			return
 		}
 	}
 }

h2mux/readylist_test.go

@@ -3,36 +3,59 @@ package h2mux
 import (
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/assert"
 )
 
-func TestReadyList(t *testing.T) {
+func assertEmpty(t *testing.T, rl *ReadyList) {
+	select {
+	case <-rl.ReadyChannel():
+		t.Fatal("Spurious wakeup")
+	default:
+	}
+}
+
+func assertClosed(t *testing.T, rl *ReadyList) {
+	select {
+	case _, ok := <-rl.ReadyChannel():
+		assert.False(t, ok, "ReadyChannel was not closed")
+	case <-time.After(100 * time.Millisecond):
+		t.Fatalf("Timeout")
+	}
+}
+
+func receiveWithTimeout(t *testing.T, rl *ReadyList) uint32 {
+	select {
+	case i := <-rl.ReadyChannel():
+		return i
+	case <-time.After(100 * time.Millisecond):
+		t.Fatalf("Timeout")
+		return 0
+	}
+}
+
+func TestReadyListEmpty(t *testing.T) {
 	rl := NewReadyList()
-	c := rl.ReadyChannel()
-	// helper functions
-	assertEmpty := func() {
-		select {
-		case <-c:
-			t.Fatalf("Spurious wakeup")
-		default:
-		}
-	}
-	receiveWithTimeout := func() uint32 {
-		select {
-		case i := <-c:
-			return i
-		case <-time.After(100 * time.Millisecond):
-			t.Fatalf("Timeout")
-			return 0
-		}
-	}
+
 	// no signals, receive should fail
-	assertEmpty()
+	assertEmpty(t, rl)
+}
+func TestReadyListSignal(t *testing.T) {
+	rl := NewReadyList()
+	assertEmpty(t, rl)
+
 	rl.Signal(0)
-	if receiveWithTimeout() != 0 {
+	if receiveWithTimeout(t, rl) != 0 {
 		t.Fatalf("Received wrong ID of signalled event")
 	}
-	// no new signals, receive should fail
-	assertEmpty()
+
+	assertEmpty(t, rl)
+}
+
+func TestReadyListMultipleSignals(t *testing.T) {
+	rl := NewReadyList()
+	assertEmpty(t, rl)
+
 	// Signals should not block;
 	// Duplicate unhandled signals should not cause multiple wakeups
 	signalled := [5]bool{}
@@ -42,12 +65,45 @@ func TestReadyList(t *testing.T) {
 	}
 	// All signals should be received once (in any order)
 	for range signalled {
-		i := receiveWithTimeout()
+		i := receiveWithTimeout(t, rl)
 		if signalled[i] {
 			t.Fatalf("Received signal %d more than once", i)
 		}
 		signalled[i] = true
 	}
+	for i := range signalled {
+		if !signalled[i] {
+			t.Fatalf("Never received signal %d", i)
+		}
+	}
+	assertEmpty(t, rl)
+}
+
+func TestReadyListClose(t *testing.T) {
+	rl := NewReadyList()
+	rl.Close()
+
+	// readyList.run() occurs in a separate goroutine,
+	// so there's no way to directly check that run() has terminated.
+	// Perform an indirect check: is the ready channel closed?
+	assertClosed(t, rl)
+
+	// a second rl.Close() shouldn't cause a panic
+	rl.Close()
+
+	// Signal shouldn't block after Close()
+	done := make(chan struct{})
+	go func() {
+		for i := 0; i < 5; i++ {
+			rl.Signal(uint32(i))
+		}
+		close(done)
+	}()
+	select {
+	case <-done:
+	case <-time.After(100 * time.Millisecond):
+		t.Fatal("Test timed out")
+	}
 }
 
 func TestReadyDescriptorQueue(t *testing.T) {

hello/hello.go

@@ -43,7 +43,7 @@ const indexTemplate = `
     <meta name="description" content="Argo Tunnel Connection">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <style>
-      html{line-height:1.15;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}section{display:block}h1{font-size:2em;margin:.67em 0}a{background-color:transparent;-webkit-text-decoration-skip:objects}/* 1 */::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}/* 1 */a,body,dd,div,dl,dt,h1,h4,html,p,section{box-sizing:border-box}.bt{border-top-style:solid;border-top-width:1px}.bl{border-left-style:solid;border-left-width:1px}.b--orange{border-color:#f38020}.br1{border-radius:.125rem}.bw2{border-width:.25rem}.dib{display:inline-block}.sans-serif{font-family:open sans,-apple-system,BlinkMacSystemFont,avenir next,avenir,helvetica neue,helvetica,ubuntu,roboto,noto,segoe ui,arial,sans-serif}.code{font-family:Consolas,monaco,monospace}.b{font-weight:700}.fw3{font-weight:300}.fw4{font-weight:400}.fw5{font-weight:500}.fw6{font-weight:600}.lh-copy{line-height:1.5}.link{text-decoration:none}.link,.link:active,.link:focus,.link:hover,.link:link,.link:visited{transition:color .15s ease-in}.link:focus{outline:1px dotted currentColor}.mw-100{max-width:100%}.mw4{max-width:8rem}.mw7{max-width:48rem}.bg-light-gray{background-color:#f7f7f7}.link-hover:hover{background-color:#1f679e}.white{color:#fff}.bg-white{background-color:#fff}.bg-blue{background-color:#408bc9}.pb2{padding-bottom:.5rem}.pb6{padding-bottom:8rem}.pt3{padding-top:1rem}.pt5{padding-top:4rem}.pv2{padding-top:.5rem;padding-bottom:.5rem}.ph3{padding-left:1rem;padding-right:1rem}.ph4{padding-left:2rem;padding-right:2rem}.ml0{margin-left:0}.mb1{margin-bottom:.25rem}.mb2{margin-bottom:.5rem}.mb3{margin-bottom:1rem}.mt5{margin-top:4rem}.ttu{text-transform:uppercase}.f4{font-size:1.25rem}.f5{font-size:1rem}.f6{font-size:.875rem}.f7{font-size:.75rem}.measure{max-width:30em}.center{margin-left:auto}.center{margin-right:auto}@media screen and (min-width:30em){.f2-ns{font-size:2.25rem}}@media screen and (min-width:30em) and (max-width:60em){.f5-m{font-size:1rem}}@media screen and (min-width:60em){.f4-l{font-size:1.25rem}}
+      html{line-height:1.15;-ms-text-size-adjust:100%;-webkit-text-size-adjust:100%}body{margin:0}section{display:block}h1{font-size:2em;margin:.67em 0}a{background-color:transparent;-webkit-text-decoration-skip:objects}/* 1 */::-webkit-file-upload-button{-webkit-appearance:button;font:inherit}/* 1 */a,body,dd,div,dl,dt,h1,h4,html,p,section{box-sizing:border-box}.bt{border-top-style:solid;border-top-width:1px}.bl{border-left-style:solid;border-left-width:1px}.b--orange{border-color:#f38020}.br1{border-radius:.125rem}.bw2{border-width:.25rem}.dib{display:inline-block}.sans-serif{font-family:open sans,-apple-system,BlinkMacSystemFont,avenir next,avenir,helvetica neue,helvetica,ubuntu,roboto,noto,segoe ui,arial,sans-serif}.overflow-x-auto{overflow-x:auto}.code{font-family:Consolas,monaco,monospace}.b{font-weight:700}.fw3{font-weight:300}.fw4{font-weight:400}.fw5{font-weight:500}.fw6{font-weight:600}.lh-copy{line-height:1.5}.link{text-decoration:none}.link,.link:active,.link:focus,.link:hover,.link:link,.link:visited{transition:color .15s ease-in}.link:focus{outline:1px dotted currentColor}.mw-100{max-width:100%}.mw4{max-width:8rem}.mw7{max-width:48rem}.bg-light-gray{background-color:#f7f7f7}.link-hover:hover{background-color:#1f679e}.white{color:#fff}.bg-white{background-color:#fff}.bg-blue{background-color:#408bc9}.pb2{padding-bottom:.5rem}.pb6{padding-bottom:8rem}.pt3{padding-top:1rem}.pt5{padding-top:4rem}.pv2{padding-top:.5rem;padding-bottom:.5rem}.ph3{padding-left:1rem;padding-right:1rem}.ph4{padding-left:2rem;padding-right:2rem}.ml0{margin-left:0}.mb1{margin-bottom:.25rem}.mb2{margin-bottom:.5rem}.mb3{margin-bottom:1rem}.mt5{margin-top:4rem}.ttu{text-transform:uppercase}.f4{font-size:1.25rem}.f5{font-size:1rem}.f6{font-size:.875rem}.f7{font-size:.75rem}.measure{max-width:30em}.center{margin-left:auto}.center{margin-right:auto}@media screen and (min-width:30em){.f2-ns{font-size:2.25rem}}@media screen and (min-width:30em) and (max-width:60em){.f5-m{font-size:1rem}}@media screen and (min-width:60em){.f4-l{font-size:1.25rem}}
     .st0{fill:#FFF}.st1{fill:#f48120}.st2{fill:#faad3f}.st3{fill:#404041}
     </style>
   </head>
@@ -91,7 +91,6 @@ const indexTemplate = `
 </html>
 `
 
-
 func StartHelloWorldServer(logger *logrus.Logger, listener net.Listener, shutdownC <-chan struct{}) error {
 	logger.Infof("Starting Hello World server at %s", listener.Addr())
 	serverName := defaultServerName
@@ -132,7 +131,6 @@ func CreateTLSListener(address string) (net.Listener, error) {
 	return listener, err
 }
 
-
 func uptimeHandler(startTime time.Time) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		// Note that if autoupdate is enabled, the uptime is reset when a new client

metrics/metrics.go

@@ -1,6 +1,7 @@
 package metrics
 
 import (
+	"context"
 	"net"
 	"net/http"
 	_ "net/http/pprof"
@@ -8,7 +9,6 @@ import (
 	"sync"
 	"time"
 
-	"golang.org/x/net/context"
 	"golang.org/x/net/trace"
 
 	"github.com/prometheus/client_golang/prometheus"

origin/backoffhandler.go

@@ -1,9 +1,8 @@
 package origin
 
 import (
+	"context"
 	"time"
-
-	"golang.org/x/net/context"
 )
 
 // Redeclare time functions so they can be overridden in tests.

origin/backoffhandler_test.go

@@ -1,10 +1,9 @@
 package origin
 
 import (
+	"context"
 	"testing"
 	"time"
-
-	"golang.org/x/net/context"
 )
 
 func immediateTimeAfter(time.Duration) <-chan time.Time {

origin/build_info.go

@@ -1,19 +0,0 @@
-package origin
-
-import (
-	"runtime"
-)
-
-type BuildInfo struct {
-	GoOS               string `json:"go_os"`
-	GoVersion          string `json:"go_version"`
-	GoArch             string `json:"go_arch"`
-}
-
-func GetBuildInfo() *BuildInfo {
-	return &BuildInfo{
-		GoOS:      runtime.GOOS,
-		GoVersion: runtime.Version(),
-		GoArch:    runtime.GOARCH,
-	}
-}

origin/cloudflare_status_page.go

@@ -0,0 +1,117 @@
+package origin
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/cloudflare/golibs/lrucache"
+)
+
+// StatusPage.io API docs:
+// https://www.cloudflarestatus.com/api/v2/#incidents-unresolved
+const (
+	activeIncidentsURL    = "https://yh6f0r4529hb.statuspage.io/api/v2/incidents/unresolved.json"
+	argoTunnelKeyword     = "argo tunnel"
+	incidentDetailsPrefix = "https://www.cloudflarestatus.com/incidents/"
+)
+
+// IncidentLookup is an object that checks for active incidents in
+// the Cloudflare infrastructure.
+type IncidentLookup interface {
+	ActiveIncidents() []Incident
+}
+
+// NewIncidentLookup returns a new IncidentLookup instance that caches its
+// results with a 1-minute TTL.
+func NewIncidentLookup() IncidentLookup {
+	return newCachedIncidentLookup(fetchActiveIncidents)
+}
+
+type IncidentUpdate struct {
+	Body string
+}
+
+type Incident struct {
+	Name    string
+	ID      string           `json:"id"`
+	Updates []IncidentUpdate `json:"incident_updates"`
+}
+
+type StatusPage struct {
+	Incidents []Incident
+}
+
+func (i Incident) URL() string {
+	return incidentDetailsPrefix + i.ID
+}
+
+func parseStatusPage(data []byte) (*StatusPage, error) {
+	var result StatusPage
+	err := json.Unmarshal(data, &result)
+	return &result, err
+}
+
+func isArgoTunnelIncident(i Incident) bool {
+	if strings.Contains(strings.ToLower(i.Name), argoTunnelKeyword) {
+		return true
+	}
+	for _, u := range i.Updates {
+		if strings.Contains(strings.ToLower(u.Body), argoTunnelKeyword) {
+			return true
+		}
+	}
+	return false
+}
+
+func fetchActiveIncidents() (incidents []Incident) {
+	resp, err := http.Get(activeIncidentsURL)
+	if err != nil {
+		return
+	}
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return
+	}
+	statusPage, err := parseStatusPage(body)
+	if err != nil {
+		return
+	}
+	for _, i := range statusPage.Incidents {
+		if isArgoTunnelIncident(i) {
+			incidents = append(incidents, i)
+		}
+	}
+	return incidents
+}
+
+type cachedIncidentLookup struct {
+	cache          *lrucache.LRUCache
+	ttl            time.Duration
+	uncachedLookup func() []Incident
+}
+
+func newCachedIncidentLookup(uncachedLookup func() []Incident) *cachedIncidentLookup {
+	return &cachedIncidentLookup{
+		cache:          lrucache.NewLRUCache(1),
+		ttl:            time.Minute,
+		uncachedLookup: uncachedLookup,
+	}
+}
+
+// We only need one cache entry. Always use the empty string as its key.
+const cacheKey = ""
+
+func (c *cachedIncidentLookup) ActiveIncidents() []Incident {
+	if cached, ok := c.cache.GetNotStale(cacheKey); ok {
+		if incidents, ok := cached.([]Incident); ok {
+			return incidents
+		}
+	}
+	incidents := c.uncachedLookup()
+	c.cache.Set(cacheKey, incidents, time.Now().Add(c.ttl))
+	return incidents
+}

origin/cloudflare_status_page_test.go

@@ -0,0 +1,386 @@
+package origin
+
+import (
+	"testing"
+	"time"
+
+	"github.com/cloudflare/golibs/lrucache"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParseStatusPage(t *testing.T) {
+	testCases := []struct {
+		input  []byte
+		output *StatusPage
+		fail   bool
+	}{
+		{
+			input: []byte(`<html>
+				<head><title>504 Gateway Time-out</title></head>
+				<body><center><h1>504 Gateway Time-out</h1></center></body>
+			</html>`),
+			output: nil,
+			fail:   true,
+		},
+		{
+			input: []byte(`{
+				"page": {
+					"id": "yh6f0r4529hb",
+					"name": "Cloudflare",
+					"url": "https://www.cloudflarestatus.com",
+					"time_zone": "Etc/UTC",
+					"updated_at": "2019-01-10T20:11:38.750Z"
+				},
+				"incidents": [
+					{
+						"name": "Cloudflare API service issues",
+						"status": "resolved",
+						"created_at": "2018-09-17T19:29:21.132Z",
+						"updated_at": "2018-09-18T07:45:41.313Z",
+						"monitoring_at": "2018-09-17T21:35:06.492Z",
+						"resolved_at": "2018-09-18T07:45:41.290Z",
+						"shortlink": "http://stspg.io/7f079791e",
+						"id": "q746ybtyb6q0",
+						"page_id": "yh6f0r4529hb",
+						"incident_updates": [
+							{
+								"status": "resolved",
+								"body": "Cloudflare has resolved the issue and the service have resumed normal operation.",
+								"created_at": "2018-09-18T07:45:41.290Z",
+								"updated_at": "2018-09-18T07:45:41.290Z",
+								"display_at": "2018-09-18T07:45:41.290Z",
+								"affected_components": [
+									{
+										"code": "g4tb35rs9yw7",
+										"name": "Cloudflare customer dashboard and APIs - Cloudflare APIs",
+										"old_status": "operational",
+										"new_status": "operational"
+									}
+								],
+								"deliver_notifications": true,
+								"tweet_id": null,
+								"id": "zl5g2pl5zhfs",
+								"incident_id": "q746ybtyb6q0",
+								"custom_tweet": null
+							},
+							{
+								"status": "monitoring",
+								"body": "Cloudflare has implemented a fix for this issue and is currently monitoring the results.\r\n\r\nWe will update the status once the issue is resolved.",
+								"created_at": "2018-09-17T21:35:06.492Z",
+								"updated_at": "2018-09-17T21:35:06.492Z",
+								"display_at": "2018-09-17T21:35:06.492Z",
+								"affected_components": [
+									{
+										"code": "g4tb35rs9yw7",
+										"name": "Cloudflare customer dashboard and APIs - Cloudflare APIs",
+										"old_status": "degraded_performance",
+										"new_status": "operational"
+									}
+								],
+								"deliver_notifications": false,
+								"tweet_id": null,
+								"id": "0001sv3chdnx",
+								"incident_id": "q746ybtyb6q0",
+								"custom_tweet": null
+							},
+							{
+								"status": "investigating",
+								"body": "We are continuing to investigate this issue.",
+								"created_at": "2018-09-17T19:30:08.049Z",
+								"updated_at": "2018-09-17T19:30:08.049Z",
+								"display_at": "2018-09-17T19:30:08.049Z",
+								"affected_components": [
+									{
+										"code": "g4tb35rs9yw7",
+										"name": "Cloudflare customer dashboard and APIs - Cloudflare APIs",
+										"old_status": "operational",
+										"new_status": "degraded_performance"
+									}
+								],
+								"deliver_notifications": false,
+								"tweet_id": null,
+								"id": "qdr164tfpq7m",
+								"incident_id": "q746ybtyb6q0",
+								"custom_tweet": null
+							},
+							{
+								"status": "investigating",
+								"body": "Cloudflare is investigating issues with APIs and Page Rule delays for Page Rule updates.  Cloudflare Page Rule service delivery is unaffected and is operating normally.  Also, these issues do not affect the Cloudflare CDN and therefore, do not impact customer websites.",
+								"created_at": "2018-09-17T19:29:21.201Z",
+								"updated_at": "2018-09-17T19:29:21.201Z",
+								"display_at": "2018-09-17T19:29:21.201Z",
+								"affected_components": [
+									{
+										"code": "g4tb35rs9yw7",
+										"name": "Cloudflare customer dashboard and APIs - Cloudflare APIs",
+										"old_status": "operational",
+										"new_status": "operational"
+									}
+								],
+								"deliver_notifications": false,
+								"tweet_id": null,
+								"id": "qzl2n0q8tskg",
+								"incident_id": "q746ybtyb6q0",
+								"custom_tweet": null
+							}
+						],
+						"components": [
+							{
+								"status": "operational",
+								"name": "Cloudflare APIs",
+								"created_at": "2014-10-09T03:32:07.158Z",
+								"updated_at": "2019-01-01T22:58:30.846Z",
+								"position": 2,
+								"description": null,
+								"showcase": false,
+								"id": "g4tb35rs9yw7",
+								"page_id": "yh6f0r4529hb",
+								"group_id": "1km35smx8p41",
+								"group": false,
+								"only_show_if_degraded": false,
+								"automation_email": "component+g4tb35rs9yw7@notifications.statuspage.io"
+							}
+						],
+						"impact": "minor"
+					},
+					{
+						"name": "Web Analytics Delays",
+						"status": "resolved",
+						"created_at": "2018-09-17T18:05:39.907Z",
+						"updated_at": "2018-09-17T22:53:05.078Z",
+						"monitoring_at": null,
+						"resolved_at": "2018-09-17T22:53:05.057Z",
+						"shortlink": "http://stspg.io/cb208928c",
+						"id": "wqfk9mzs5qt1",
+						"page_id": "yh6f0r4529hb",
+						"incident_updates": [
+							{
+								"status": "resolved",
+								"body": "Cloudflare has resolved the issue and Web Analytics have resumed normal operation.",
+								"created_at": "2018-09-17T22:53:05.057Z",
+								"updated_at": "2018-09-17T22:53:05.057Z",
+								"display_at": "2018-09-17T22:53:05.057Z",
+								"affected_components": [
+									{
+										"code": "4c231tkdlpcl",
+										"name": "Cloudflare customer dashboard and APIs - Analytics",
+										"old_status": "degraded_performance",
+										"new_status": "operational"
+									}
+								],
+								"deliver_notifications": false,
+								"tweet_id": null,
+								"id": "93y1w00yqzk4",
+								"incident_id": "wqfk9mzs5qt1",
+								"custom_tweet": null
+							},
+							{
+								"status": "investigating",
+								"body": "There is a delay in processing Cloudflare Web Analytics. This affects timely delivery of customer data.\n\nThese delays do not impact analytics for DNS and Rate Limiting.",
+								"created_at": "2018-09-17T18:05:40.033Z",
+								"updated_at": "2018-09-17T18:05:40.033Z",
+								"display_at": "2018-09-17T18:05:40.033Z",
+								"affected_components": [
+									{
+										"code": "4c231tkdlpcl",
+										"name": "Cloudflare customer dashboard and APIs - Analytics",
+										"old_status": "operational",
+										"new_status": "degraded_performance"
+									}
+								],
+								"deliver_notifications": false,
+								"tweet_id": null,
+								"id": "362t6lv0vrpk",
+								"incident_id": "wqfk9mzs5qt1",
+								"custom_tweet": null
+							}
+						],
+						"components": [
+							{
+								"status": "operational",
+								"name": "Analytics",
+								"created_at": "2014-11-13T11:54:10.191Z",
+								"updated_at": "2018-12-31T08:20:52.349Z",
+								"position": 3,
+								"description": "Customer data",
+								"showcase": false,
+								"id": "4c231tkdlpcl",
+								"page_id": "yh6f0r4529hb",
+								"group_id": "1km35smx8p41",
+								"group": false,
+								"only_show_if_degraded": false,
+								"automation_email": "component+4c231tkdlpcl@notifications.statuspage.io"
+							}
+						],
+						"impact": "minor"
+					}
+				]
+			}`),
+			output: &StatusPage{
+				Incidents: []Incident{
+					Incident{
+						Name: "Cloudflare API service issues",
+						ID:   "q746ybtyb6q0",
+						Updates: []IncidentUpdate{
+							IncidentUpdate{
+								Body: "Cloudflare has resolved the issue and the service have resumed normal operation.",
+							},
+							IncidentUpdate{
+								Body: "Cloudflare has implemented a fix for this issue and is currently monitoring the results.\r\n\r\nWe will update the status once the issue is resolved.",
+							},
+							IncidentUpdate{
+								Body: "We are continuing to investigate this issue.",
+							},
+							IncidentUpdate{
+								Body: "Cloudflare is investigating issues with APIs and Page Rule delays for Page Rule updates.  Cloudflare Page Rule service delivery is unaffected and is operating normally.  Also, these issues do not affect the Cloudflare CDN and therefore, do not impact customer websites.",
+							},
+						},
+					},
+					Incident{
+						Name: "Web Analytics Delays",
+						ID:   "wqfk9mzs5qt1",
+						Updates: []IncidentUpdate{
+							IncidentUpdate{
+								Body: "Cloudflare has resolved the issue and Web Analytics have resumed normal operation.",
+							},
+							IncidentUpdate{
+								Body: "There is a delay in processing Cloudflare Web Analytics. This affects timely delivery of customer data.\n\nThese delays do not impact analytics for DNS and Rate Limiting.",
+							},
+						},
+					},
+				},
+			},
+			fail: false,
+		},
+	}
+
+	for _, testCase := range testCases {
+		output, err := parseStatusPage(testCase.input)
+		if testCase.fail {
+			assert.Error(t, err)
+		} else {
+			assert.Nil(t, err)
+			assert.Equal(t, testCase.output, output)
+		}
+	}
+}
+
+func TestIsArgoTunnelIncident(t *testing.T) {
+	testCases := []struct {
+		input  Incident
+		output bool
+	}{
+		{
+			input:  Incident{},
+			output: false,
+		},
+		{
+			input:  Incident{Name: "An Argo Tunnel incident"},
+			output: true,
+		},
+		{
+			input:  Incident{Name: "an argo tunnel incident"},
+			output: true,
+		},
+		{
+			input:  Incident{Name: "an aRgO TuNnEl incident"},
+			output: true,
+		},
+		{
+			input:  Incident{Name: "an argotunnel incident"},
+			output: false,
+		},
+		{
+			input:  Incident{Name: "irrelevant"},
+			output: false,
+		},
+		{
+			input: Incident{
+				Name: "irrelevant",
+				Updates: []IncidentUpdate{
+					IncidentUpdate{Body: "irrelevant"},
+					IncidentUpdate{Body: "an Argo Tunnel incident"},
+					IncidentUpdate{Body: "irrelevant"},
+				},
+			},
+			output: true,
+		},
+		{
+			input: Incident{
+				Name: "an Argo Tunnel incident",
+				Updates: []IncidentUpdate{
+					IncidentUpdate{Body: "irrelevant"},
+					IncidentUpdate{Body: "irrelevant"},
+					IncidentUpdate{Body: "irrelevant"},
+				},
+			},
+			output: true,
+		},
+	}
+	for _, testCase := range testCases {
+		actual := isArgoTunnelIncident(testCase.input)
+		assert.Equal(t, testCase.output, actual, "Test case failed: %v", testCase.input)
+	}
+}
+
+func TestIncidentURL(t *testing.T) {
+	incident := Incident{
+		ID: "s6k0dnn5347b",
+	}
+	assert.Equal(t, "https://www.cloudflarestatus.com/incidents/s6k0dnn5347b", incident.URL())
+}
+
+func TestNewCachedIncidentLookup(t *testing.T) {
+	c := newCachedIncidentLookup(func() []Incident { return nil })
+	assert.Equal(t, time.Minute, c.ttl)
+	assert.Equal(t, 1, c.cache.Capacity())
+}
+
+func TestCachedIncidentLookup(t *testing.T) {
+	expected := []Incident{
+		Incident{
+			Name: "An incident",
+			ID:   "incidentID",
+		},
+	}
+
+	var shouldCallUncachedLookup bool
+	c := &cachedIncidentLookup{
+		cache: lrucache.NewLRUCache(1),
+		ttl:   50 * time.Millisecond,
+		uncachedLookup: func() []Incident {
+			if !shouldCallUncachedLookup {
+				t.Fatal("uncachedLookup shouldn't have been called")
+			}
+			return expected
+		},
+	}
+
+	shouldCallUncachedLookup = true
+	assert.Equal(t, expected, c.ActiveIncidents())
+
+	shouldCallUncachedLookup = false
+	assert.Equal(t, expected, c.ActiveIncidents())
+	assert.Equal(t, expected, c.ActiveIncidents())
+
+	time.Sleep(50 * time.Millisecond)
+	shouldCallUncachedLookup = true
+	assert.Equal(t, expected, c.ActiveIncidents())
+}
+
+func TestCachedIncidentLookupDoesntPanic(t *testing.T) {
+	expected := []Incident{
+		Incident{
+			Name: "An incident",
+			ID:   "incidentID",
+		},
+	}
+	c := &cachedIncidentLookup{
+		cache:          lrucache.NewLRUCache(1),
+		ttl:            50 * time.Millisecond,
+		uncachedLookup: func() []Incident { return expected },
+	}
+	c.cache.Set(cacheKey, 42, time.Now().Add(30*time.Minute))
+	actual := c.ActiveIncidents()
+	assert.Equal(t, expected, actual)
+}

origin/discovery.go

@@ -1,82 +0,0 @@
-package origin
-
-import (
-	"fmt"
-	"net"
-)
-
-const (
-	// Used to discover HA Warp servers
-	srvService = "warp"
-	srvProto   = "tcp"
-	srvName    = "cloudflarewarp.com"
-)
-
-func ResolveEdgeIPs(addresses []string) ([]*net.TCPAddr, error) {
-	if len(addresses) > 0 {
-		var tcpAddrs []*net.TCPAddr
-		for _, address := range addresses {
-			// Addresses specified (for testing, usually)
-			tcpAddr, err := net.ResolveTCPAddr("tcp", address)
-			if err != nil {
-				return nil, err
-			}
-			tcpAddrs = append(tcpAddrs, tcpAddr)
-		}
-		return tcpAddrs, nil
-	}
-	// HA service discovery lookup
-	_, addrs, err := net.LookupSRV(srvService, srvProto, srvName)
-	if err != nil {
-		return nil, err
-	}
-	var resolvedIPsPerCNAME [][]*net.TCPAddr
-	var lookupErr error
-	for _, addr := range addrs {
-		ips, err := ResolveSRVToTCP(addr)
-		if err != nil || len(ips) == 0 {
-			// don't return early, we might be able to resolve other addresses
-			lookupErr = err
-			continue
-		}
-		resolvedIPsPerCNAME = append(resolvedIPsPerCNAME, ips)
-	}
-	ips := FlattenServiceIPs(resolvedIPsPerCNAME)
-	if lookupErr == nil && len(ips) == 0 {
-		return nil, fmt.Errorf("Unknown service discovery error")
-	}
-	return ips, lookupErr
-}
-
-func ResolveSRVToTCP(srv *net.SRV) ([]*net.TCPAddr, error) {
-	ips, err := net.LookupIP(srv.Target)
-	if err != nil {
-		return nil, err
-	}
-	addrs := make([]*net.TCPAddr, len(ips))
-	for i, ip := range ips {
-		addrs[i] = &net.TCPAddr{IP: ip, Port: int(srv.Port)}
-	}
-	return addrs, nil
-}
-
-// FlattenServiceIPs transposes and flattens the input slices such that the
-// first element of the n inner slices are the first n elements of the result.
-func FlattenServiceIPs(ipsByService [][]*net.TCPAddr) []*net.TCPAddr {
-	var result []*net.TCPAddr
-	for len(ipsByService) > 0 {
-		filtered := ipsByService[:0]
-		for _, ips := range ipsByService {
-			if len(ips) == 0 {
-				// sanity check
-				continue
-			}
-			result = append(result, ips[0])
-			if len(ips) > 1 {
-				filtered = append(filtered, ips[1:])
-			}
-		}
-		ipsByService = filtered
-	}
-	return result
-}

origin/metrics.go

@@ -51,7 +51,13 @@ type TunnelMetrics struct {
 	// oldServerLocations stores the last server the tunnel was connected to
 	oldServerLocations map[string]string
 
-	muxerMetrics *muxerMetrics
+	regSuccess prometheus.Counter
+	regFail    *prometheus.CounterVec
+	rpcFail    *prometheus.CounterVec
+
+	muxerMetrics        *muxerMetrics
+	tunnelsHA           tunnelsForHA
+	userHostnamesCounts *prometheus.CounterVec
 }
 
 func newMuxerMetrics() *muxerMetrics {
@@ -341,6 +347,40 @@ func NewTunnelMetrics() *TunnelMetrics {
 	)
 	prometheus.MustRegister(serverLocations)
 
+	rpcFail := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "tunnel_rpc_fail",
+			Help: "Count of RPC connection errors by type",
+		},
+		[]string{"error"},
+	)
+	prometheus.MustRegister(rpcFail)
+
+	registerFail := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "tunnel_register_fail",
+			Help: "Count of tunnel registration errors by type",
+		},
+		[]string{"error"},
+	)
+	prometheus.MustRegister(registerFail)
+
+	userHostnamesCounts := prometheus.NewCounterVec(
+		prometheus.CounterOpts{
+			Name: "user_hostnames_counts",
+			Help: "Which user hostnames cloudflared is serving",
+		},
+		[]string{"userHostname"},
+	)
+	prometheus.MustRegister(userHostnamesCounts)
+
+	registerSuccess := prometheus.NewCounter(
+		prometheus.CounterOpts{
+			Name: "tunnel_register_success",
+			Help: "Count of successful tunnel registrations",
+		})
+	prometheus.MustRegister(registerSuccess)
+
 	return &TunnelMetrics{
 		haConnections:                  haConnections,
 		totalRequests:                  totalRequests,
@@ -355,6 +395,11 @@ func NewTunnelMetrics() *TunnelMetrics {
 		serverLocations:                serverLocations,
 		oldServerLocations:             make(map[string]string),
 		muxerMetrics:                   newMuxerMetrics(),
+		tunnelsHA:                      NewTunnelsForHA(),
+		regSuccess:                     registerSuccess,
+		regFail:                        registerFail,
+		rpcFail:                        rpcFail,
+		userHostnamesCounts:            userHostnamesCounts,
 	}
 }
 
@@ -375,7 +420,7 @@ func (t *TunnelMetrics) incrementRequests(connectionID string) {
 	var concurrentRequests uint64
 	var ok bool
 	if concurrentRequests, ok = t.concurrentRequests[connectionID]; ok {
-		t.concurrentRequests[connectionID] += 1
+		t.concurrentRequests[connectionID]++
 		concurrentRequests++
 	} else {
 		t.concurrentRequests[connectionID] = 1
@@ -395,7 +440,7 @@ func (t *TunnelMetrics) incrementRequests(connectionID string) {
 func (t *TunnelMetrics) decrementConcurrentRequests(connectionID string) {
 	t.concurrentRequestsLock.Lock()
 	if _, ok := t.concurrentRequests[connectionID]; ok {
-		t.concurrentRequests[connectionID] -= 1
+		t.concurrentRequests[connectionID]--
 	}
 	t.concurrentRequestsLock.Unlock()
 

origin/supervisor.go

@@ -1,11 +1,17 @@
 package origin
 
 import (
+	"context"
 	"fmt"
 	"net"
 	"time"
 
-	"golang.org/x/net/context"
+	"github.com/sirupsen/logrus"
+
+	"github.com/cloudflare/cloudflared/connection"
+	"github.com/cloudflare/cloudflared/signal"
+
+	"github.com/google/uuid"
 )
 
 const (
@@ -30,6 +36,8 @@ type Supervisor struct {
 	// currently-connecting tunnels to finish connecting so we can reset backoff timer
 	nextConnectedIndex  int
 	nextConnectedSignal chan struct{}
+
+	logger *logrus.Entry
 }
 
 type resolveResult struct {
@@ -47,12 +55,13 @@ func NewSupervisor(config *TunnelConfig) *Supervisor {
 		config:            config,
 		tunnelErrors:      make(chan tunnelError),
 		tunnelsConnecting: map[int]chan struct{}{},
+		logger:            config.Logger.WithField("subsystem", "supervisor"),
 	}
 }
 
-func (s *Supervisor) Run(ctx context.Context, connectedSignal chan struct{}) error {
+func (s *Supervisor) Run(ctx context.Context, connectedSignal *signal.Signal, u uuid.UUID) error {
 	logger := s.config.Logger
-	if err := s.initialize(ctx, connectedSignal); err != nil {
+	if err := s.initialize(ctx, connectedSignal, u); err != nil {
 		return err
 	}
 	var tunnelsWaiting []int
@@ -95,7 +104,7 @@ func (s *Supervisor) Run(ctx context.Context, connectedSignal chan struct{}) err
 		case <-backoffTimer:
 			backoffTimer = nil
 			for _, index := range tunnelsWaiting {
-				go s.startTunnel(ctx, index, s.newConnectedTunnelSignal(index))
+				go s.startTunnel(ctx, index, s.newConnectedTunnelSignal(index), u)
 			}
 			tunnelsActive += len(tunnelsWaiting)
 			tunnelsWaiting = nil
@@ -119,9 +128,11 @@ func (s *Supervisor) Run(ctx context.Context, connectedSignal chan struct{}) err
 	}
 }
 
-func (s *Supervisor) initialize(ctx context.Context, connectedSignal chan struct{}) error {
-	logger := s.config.Logger
-	edgeIPs, err := ResolveEdgeIPs(s.config.EdgeAddrs)
+func (s *Supervisor) initialize(ctx context.Context, connectedSignal *signal.Signal, u uuid.UUID) error {
+	logger := s.logger
+
+	edgeIPs, err := s.resolveEdgeIPs()
+
 	if err != nil {
 		logger.Infof("ResolveEdgeIPs err")
 		return err
@@ -134,7 +145,7 @@ func (s *Supervisor) initialize(ctx context.Context, connectedSignal chan struct
 	s.lastResolve = time.Now()
 	// check entitlement and version too old error before attempting to register more tunnels
 	s.nextUnusedEdgeIP = s.config.HAConnections
-	go s.startFirstTunnel(ctx, connectedSignal)
+	go s.startFirstTunnel(ctx, connectedSignal, u)
 	select {
 	case <-ctx.Done():
 		<-s.tunnelErrors
@@ -142,11 +153,12 @@ func (s *Supervisor) initialize(ctx context.Context, connectedSignal chan struct
 		return fmt.Errorf("context was canceled")
 	case tunnelError := <-s.tunnelErrors:
 		return tunnelError.err
-	case <-connectedSignal:
+	case <-connectedSignal.Wait():
 	}
 	// At least one successful connection, so start the rest
 	for i := 1; i < s.config.HAConnections; i++ {
-		go s.startTunnel(ctx, i, make(chan struct{}))
+		ch := signal.New(make(chan struct{}))
+		go s.startTunnel(ctx, i, ch, u)
 		time.Sleep(registrationInterval)
 	}
 	return nil
@@ -154,8 +166,8 @@ func (s *Supervisor) initialize(ctx context.Context, connectedSignal chan struct
 
 // startTunnel starts the first tunnel connection. The resulting error will be sent on
 // s.tunnelErrors. It will send a signal via connectedSignal if registration succeed
-func (s *Supervisor) startFirstTunnel(ctx context.Context, connectedSignal chan struct{}) {
-	err := ServeTunnelLoop(ctx, s.config, s.getEdgeIP(0), 0, connectedSignal)
+func (s *Supervisor) startFirstTunnel(ctx context.Context, connectedSignal *signal.Signal, u uuid.UUID) {
+	err := ServeTunnelLoop(ctx, s.config, s.getEdgeIP(0), 0, connectedSignal, u)
 	defer func() {
 		s.tunnelErrors <- tunnelError{index: 0, err: err}
 	}()
@@ -176,23 +188,23 @@ func (s *Supervisor) startFirstTunnel(ctx context.Context, connectedSignal chan
 		default:
 			return
 		}
-		err = ServeTunnelLoop(ctx, s.config, s.getEdgeIP(0), 0, connectedSignal)
+		err = ServeTunnelLoop(ctx, s.config, s.getEdgeIP(0), 0, connectedSignal, u)
 	}
 }
 
 // startTunnel starts a new tunnel connection. The resulting error will be sent on
 // s.tunnelErrors.
-func (s *Supervisor) startTunnel(ctx context.Context, index int, connectedSignal chan struct{}) {
-	err := ServeTunnelLoop(ctx, s.config, s.getEdgeIP(index), uint8(index), connectedSignal)
+func (s *Supervisor) startTunnel(ctx context.Context, index int, connectedSignal *signal.Signal, u uuid.UUID) {
+	err := ServeTunnelLoop(ctx, s.config, s.getEdgeIP(index), uint8(index), connectedSignal, u)
 	s.tunnelErrors <- tunnelError{index: index, err: err}
 }
 
-func (s *Supervisor) newConnectedTunnelSignal(index int) chan struct{} {
-	signal := make(chan struct{})
-	s.tunnelsConnecting[index] = signal
-	s.nextConnectedSignal = signal
+func (s *Supervisor) newConnectedTunnelSignal(index int) *signal.Signal {
+	sig := make(chan struct{})
+	s.tunnelsConnecting[index] = sig
+	s.nextConnectedSignal = sig
 	s.nextConnectedIndex = index
-	return signal
+	return signal.New(sig)
 }
 
 func (s *Supervisor) waitForNextTunnel(index int) bool {
@@ -210,6 +222,15 @@ func (s *Supervisor) getEdgeIP(index int) *net.TCPAddr {
 	return s.edgeIPs[index%len(s.edgeIPs)]
 }
 
+func (s *Supervisor) resolveEdgeIPs() ([]*net.TCPAddr, error) {
+	// If --edge is specfied, resolve edge server addresses
+	if len(s.config.EdgeAddrs) > 0 {
+		return connection.ResolveAddrs(s.config.EdgeAddrs)
+	}
+	// Otherwise lookup edge server addresses through service discovery
+	return connection.EdgeDiscovery(s.logger)
+}
+
 func (s *Supervisor) refreshEdgeIPs() {
 	if s.resolverC != nil {
 		return
@@ -219,7 +240,7 @@ func (s *Supervisor) refreshEdgeIPs() {
 	}
 	s.resolverC = make(chan resolveResult)
 	go func() {
-		edgeIPs, err := ResolveEdgeIPs(s.config.EdgeAddrs)
+		edgeIPs, err := s.resolveEdgeIPs()
 		s.resolverC <- resolveResult{edgeIPs: edgeIPs, err: err}
 	}()
 }

origin/tunnel.go

@@ -2,6 +2,7 @@ package origin
 
 import (
 	"bufio"
+	"context"
 	"crypto/tls"
 	"fmt"
 	"io"
@@ -10,58 +11,68 @@ import (
 	"net/url"
 	"strconv"
 	"strings"
+	"sync"
 	"time"
 
-	"golang.org/x/net/context"
-	"golang.org/x/sync/errgroup"
-
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/buildinfo"
 	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/signal"
+	"github.com/cloudflare/cloudflared/streamhandler"
 	"github.com/cloudflare/cloudflared/tunnelrpc"
 	tunnelpogs "github.com/cloudflare/cloudflared/tunnelrpc/pogs"
 	"github.com/cloudflare/cloudflared/validation"
 	"github.com/cloudflare/cloudflared/websocket"
 
 	raven "github.com/getsentry/raven-go"
+	"github.com/google/uuid"
 	"github.com/pkg/errors"
+	"github.com/prometheus/client_golang/prometheus"
 	_ "github.com/prometheus/client_golang/prometheus"
 	log "github.com/sirupsen/logrus"
+	"golang.org/x/sync/errgroup"
 	rpc "zombiezen.com/go/capnproto2/rpc"
 )
 
 const (
 	dialTimeout              = 15 * time.Second
+	openStreamTimeout        = 30 * time.Second
 	lbProbeUserAgentPrefix   = "Mozilla/5.0 (compatible; Cloudflare-Traffic-Manager/1.0; +https://www.cloudflare.com/traffic-manager/;"
 	TagHeaderNamePrefix      = "Cf-Warp-Tag-"
 	DuplicateConnectionError = "EDUPCONN"
 )
 
 type TunnelConfig struct {
-	EdgeAddrs          []string
-	OriginUrl          string
-	Hostname           string
-	OriginCert         []byte
-	TlsConfig          *tls.Config
-	ClientTlsConfig    *tls.Config
-	Retries            uint
-	HeartbeatInterval  time.Duration
-	MaxHeartbeats      uint64
-	ClientID           string
-	BuildInfo          *BuildInfo
-	ReportedVersion    string
-	LBPool             string
-	Tags               []tunnelpogs.Tag
-	HAConnections      int
-	HTTPTransport      http.RoundTripper
-	Metrics            *TunnelMetrics
-	MetricsUpdateFreq  time.Duration
-	ProtocolLogger     *log.Logger
-	Logger             *log.Logger
-	IsAutoupdated      bool
-	GracePeriod        time.Duration
-	RunFromTerminal    bool
-	NoChunkedEncoding  bool
-	WSGI               bool
-	CompressionQuality uint64
+	BuildInfo            *buildinfo.BuildInfo
+	ClientID             string
+	ClientTlsConfig      *tls.Config
+	CloseConnOnce        *sync.Once // Used to close connectedSignal no more than once
+	CompressionQuality   uint64
+	EdgeAddrs            []string
+	GracePeriod          time.Duration
+	HAConnections        int
+	HTTPTransport        http.RoundTripper
+	HeartbeatInterval    time.Duration
+	Hostname             string
+	IncidentLookup       IncidentLookup
+	IsAutoupdated        bool
+	IsFreeTunnel         bool
+	LBPool               string
+	Logger               *log.Logger
+	MaxHeartbeats        uint64
+	Metrics              *TunnelMetrics
+	MetricsUpdateFreq    time.Duration
+	NoChunkedEncoding    bool
+	OriginCert           []byte
+	ReportedVersion      string
+	Retries              uint
+	RunFromTerminal      bool
+	Tags                 []tunnelpogs.Tag
+	TlsConfig            *tls.Config
+	TransportLogger      *log.Logger
+	UseDeclarativeTunnel bool
+	WSGI                 bool
+	// OriginUrl may not be used if a user specifies a unix socket.
+	OriginUrl string
 }
 
 type dialError struct {
@@ -99,11 +110,16 @@ type clientRegisterTunnelError struct {
 	cause error
 }
 
+func newClientRegisterTunnelError(cause error, counter *prometheus.CounterVec) clientRegisterTunnelError {
+	counter.WithLabelValues(cause.Error()).Inc()
+	return clientRegisterTunnelError{cause: cause}
+}
+
 func (e clientRegisterTunnelError) Error() string {
 	return e.cause.Error()
 }
 
-func (c *TunnelConfig) RegistrationOptions(connectionID uint8, OriginLocalIP string) *tunnelpogs.RegistrationOptions {
+func (c *TunnelConfig) RegistrationOptions(connectionID uint8, OriginLocalIP string, uuid uuid.UUID) *tunnelpogs.RegistrationOptions {
 	policy := tunnelrpc.ExistingTunnelPolicy_balance
 	if c.HAConnections <= 1 && c.LBPool == "" {
 		policy = tunnelrpc.ExistingTunnelPolicy_disconnect
@@ -120,48 +136,35 @@ func (c *TunnelConfig) RegistrationOptions(connectionID uint8, OriginLocalIP str
 		IsAutoupdated:        c.IsAutoupdated,
 		RunFromTerminal:      c.RunFromTerminal,
 		CompressionQuality:   c.CompressionQuality,
+		UUID:                 uuid.String(),
 	}
 }
 
-func StartTunnelDaemon(config *TunnelConfig, shutdownC <-chan struct{}, connectedSignal chan struct{}) error {
-	ctx, cancel := context.WithCancel(context.Background())
-	go func() {
-		<-shutdownC
-		cancel()
-	}()
-	// If a user specified negative HAConnections, we will treat it as requesting 1 connection
-	if config.HAConnections > 1 {
-		return NewSupervisor(config).Run(ctx, connectedSignal)
-	} else {
-		addrs, err := ResolveEdgeIPs(config.EdgeAddrs)
-		if err != nil {
-			return err
-		}
-		return ServeTunnelLoop(ctx, config, addrs[0], 0, connectedSignal)
-	}
+func StartTunnelDaemon(ctx context.Context, config *TunnelConfig, connectedSignal *signal.Signal, cloudflaredID uuid.UUID) error {
+	return NewSupervisor(config).Run(ctx, connectedSignal, cloudflaredID)
 }
 
 func ServeTunnelLoop(ctx context.Context,
 	config *TunnelConfig,
 	addr *net.TCPAddr,
 	connectionID uint8,
-	connectedSignal chan struct{},
+	connectedSignal *signal.Signal,
+	u uuid.UUID,
 ) error {
 	logger := config.Logger
 	config.Metrics.incrementHaConnections()
 	defer config.Metrics.decrementHaConnections()
 	backoff := BackoffHandler{MaxRetries: config.Retries}
-	// Used to close connectedSignal no more than once
 	connectedFuse := h2mux.NewBooleanFuse()
 	go func() {
 		if connectedFuse.Await() {
-			close(connectedSignal)
+			connectedSignal.Notify()
 		}
 	}()
 	// Ensure the above goroutine will terminate if we return without connecting
 	defer connectedFuse.Fuse(false)
 	for {
-		err, recoverable := ServeTunnel(ctx, config, addr, connectionID, connectedFuse, &backoff)
+		err, recoverable := ServeTunnel(ctx, config, addr, connectionID, connectedFuse, &backoff, u)
 		if recoverable {
 			if duration, ok := backoff.GetBackoffDuration(ctx); ok {
 				logger.Infof("Retrying in %s seconds", duration)
@@ -180,6 +183,7 @@ func ServeTunnel(
 	connectionID uint8,
 	connectedFuse *h2mux.BooleanFuse,
 	backoff *BackoffHandler,
+	u uuid.UUID,
 ) (err error, recoverable bool) {
 	// Treat panics as recoverable errors
 	defer func() {
@@ -219,7 +223,7 @@ func ServeTunnel(
 	errGroup, serveCtx := errgroup.WithContext(ctx)
 
 	errGroup.Go(func() error {
-		err := RegisterTunnel(serveCtx, handler.muxer, config, connectionID, originLocalIP)
+		err := RegisterTunnel(serveCtx, handler.muxer, config, connectionID, originLocalIP, u)
 		if err == nil {
 			connectedFuse.Fuse(true)
 			backoff.SetGracePeriod()
@@ -233,7 +237,7 @@ func ServeTunnel(
 			select {
 			case <-serveCtx.Done():
 				// UnregisterTunnel blocks until the RPC call returns
-				err := UnregisterTunnel(handler.muxer, config.GracePeriod, config.Logger)
+				err := UnregisterTunnel(handler.muxer, config.GracePeriod, config.TransportLogger)
 				handler.muxer.Shutdown()
 				return err
 			case <-updateMetricsTickC:
@@ -263,6 +267,9 @@ func ServeTunnel(
 			logger.WithError(castedErr.cause).Error("Register tunnel error from server side")
 			// Don't send registration error return from server to Sentry. They are
 			// logged on server side
+			if incidents := config.IncidentLookup.ActiveIncidents(); len(incidents) > 0 {
+				logger.Error(activeIncidentsMsg(incidents))
+			}
 			return castedErr.cause, !castedErr.permanent
 		case clientRegisterTunnelError:
 			logger.WithError(castedErr.cause).Error("Register tunnel error on client side")
@@ -290,24 +297,27 @@ func IsRPCStreamResponse(headers []h2mux.Header) bool {
 	return true
 }
 
-func RegisterTunnel(ctx context.Context, muxer *h2mux.Muxer, config *TunnelConfig, connectionID uint8, originLocalIP string) error {
-	config.Logger.Debug("initiating RPC stream to register")
-	stream, err := muxer.OpenStream([]h2mux.Header{
-		{Name: ":method", Value: "RPC"},
-		{Name: ":scheme", Value: "capnp"},
-		{Name: ":path", Value: "*"},
-	}, nil)
+func RegisterTunnel(
+	ctx context.Context,
+	muxer *h2mux.Muxer,
+	config *TunnelConfig,
+	connectionID uint8,
+	originLocalIP string,
+	uuid uuid.UUID,
+) error {
+	config.TransportLogger.Debug("initiating RPC stream to register")
+	stream, err := openStream(ctx, muxer)
 	if err != nil {
 		// RPC stream open error
-		return clientRegisterTunnelError{cause: err}
+		return newClientRegisterTunnelError(err, config.Metrics.rpcFail)
 	}
 	if !IsRPCStreamResponse(stream.Headers) {
 		// stream response error
-		return clientRegisterTunnelError{cause: err}
+		return newClientRegisterTunnelError(err, config.Metrics.rpcFail)
 	}
 	conn := rpc.NewConn(
-		tunnelrpc.NewTransportLogger(config.Logger.WithField("subsystem", "rpc-register"), rpc.StreamTransport(stream)),
-		tunnelrpc.ConnLog(config.Logger.WithField("subsystem", "rpc-transport")),
+		tunnelrpc.NewTransportLogger(config.TransportLogger.WithField("subsystem", "rpc-register"), rpc.StreamTransport(stream)),
+		tunnelrpc.ConnLog(config.TransportLogger.WithField("subsystem", "rpc-transport")),
 	)
 	defer conn.Close()
 	ts := tunnelpogs.TunnelServer_PogsClient{Client: conn.Bootstrap(ctx)}
@@ -320,47 +330,64 @@ func RegisterTunnel(ctx context.Context, muxer *h2mux.Muxer, config *TunnelConfi
 		ctx,
 		config.OriginCert,
 		config.Hostname,
-		config.RegistrationOptions(connectionID, originLocalIP),
+		config.RegistrationOptions(connectionID, originLocalIP, uuid),
 	)
 	LogServerInfo(serverInfoPromise.Result(), connectionID, config.Metrics, config.Logger)
 	if err != nil {
 		// RegisterTunnel RPC failure
-		return clientRegisterTunnelError{cause: err}
+		return newClientRegisterTunnelError(err, config.Metrics.regFail)
 	}
 	for _, logLine := range registration.LogLines {
 		config.Logger.Info(logLine)
 	}
-	if registration.Err == DuplicateConnectionError {
-		return dupConnRegisterTunnelError{}
-	} else if registration.Err != "" {
-		return serverRegisterTunnelError{
-			cause:     fmt.Errorf("Server error: %s", registration.Err),
-			permanent: registration.PermanentFailure,
-		}
+
+	if regErr := processRegisterTunnelError(registration.Err, registration.PermanentFailure, config.Metrics); regErr != nil {
+		return regErr
 	}
 
 	if registration.TunnelID != "" {
-		config.Logger.Info("Tunnel ID: " + registration.TunnelID)
+		config.Metrics.tunnelsHA.AddTunnelID(connectionID, registration.TunnelID)
+		config.Logger.Infof("Each HA connection's tunnel IDs: %v", config.Metrics.tunnelsHA.String())
 	}
 
 	// Print out the user's trial zone URL in a nice box (if they requested and got one)
-	if isTrialTunnel := config.Hostname == "" && registration.Url != ""; isTrialTunnel {
-		for _, line := range asciiBox(trialZoneMsg(registration.Url), 2) {
-			config.Logger.Infoln(line)
+	if isTrialTunnel := config.Hostname == ""; isTrialTunnel {
+		if url, err := url.Parse(registration.Url); err == nil {
+			for _, line := range asciiBox(trialZoneMsg(url.String()), 2) {
+				config.Logger.Infoln(line)
+			}
+		} else {
+			config.Logger.Errorln("Failed to connect tunnel, please try again.")
+			return fmt.Errorf("empty URL in response from Cloudflare edge")
 		}
 	}
 
+	config.Metrics.userHostnamesCounts.WithLabelValues(registration.Url).Inc()
+
 	config.Logger.Infof("Route propagating, it may take up to 1 minute for your new route to become functional")
 	return nil
 }
 
+func processRegisterTunnelError(err string, permanentFailure bool, metrics *TunnelMetrics) error {
+	if err == "" {
+		metrics.regSuccess.Inc()
+		return nil
+	}
+
+	metrics.regFail.WithLabelValues(err).Inc()
+	if err == DuplicateConnectionError {
+		return dupConnRegisterTunnelError{}
+	}
+	return serverRegisterTunnelError{
+		cause:     fmt.Errorf("Server error: %s", err),
+		permanent: permanentFailure,
+	}
+}
+
 func UnregisterTunnel(muxer *h2mux.Muxer, gracePeriod time.Duration, logger *log.Logger) error {
 	logger.Debug("initiating RPC stream to unregister")
-	stream, err := muxer.OpenStream([]h2mux.Header{
-		{Name: ":method", Value: "RPC"},
-		{Name: ":scheme", Value: "capnp"},
-		{Name: ":path", Value: "*"},
-	}, nil)
+	ctx := context.Background()
+	stream, err := openStream(ctx, muxer)
 	if err != nil {
 		// RPC stream open error
 		return err
@@ -369,7 +396,6 @@ func UnregisterTunnel(muxer *h2mux.Muxer, gracePeriod time.Duration, logger *log
 		// stream response error
 		return err
 	}
-	ctx := context.Background()
 	conn := rpc.NewConn(
 		tunnelrpc.NewTransportLogger(logger.WithField("subsystem", "rpc-unregister"), rpc.StreamTransport(stream)),
 		tunnelrpc.ConnLog(logger.WithField("subsystem", "rpc-transport")),
@@ -380,6 +406,16 @@ func UnregisterTunnel(muxer *h2mux.Muxer, gracePeriod time.Duration, logger *log
 	return ts.UnregisterTunnel(ctx, gracePeriod.Nanoseconds())
 }
 
+func openStream(ctx context.Context, muxer *h2mux.Muxer) (*h2mux.MuxedStream, error) {
+	openStreamCtx, cancel := context.WithTimeout(ctx, openStreamTimeout)
+	defer cancel()
+	return muxer.OpenStream(openStreamCtx, []h2mux.Header{
+		{Name: ":method", Value: "RPC"},
+		{Name: ":scheme", Value: "capnp"},
+		{Name: ":path", Value: "*"},
+	}, nil)
+}
+
 func LogServerInfo(
 	promise tunnelrpc.ServerInfo_Promise,
 	connectionID uint8,
@@ -400,33 +436,6 @@ func LogServerInfo(
 	metrics.registerServerLocation(uint8ToString(connectionID), serverInfo.LocationName)
 }
 
-func H2RequestHeadersToH1Request(h2 []h2mux.Header, h1 *http.Request) error {
-	for _, header := range h2 {
-		switch header.Name {
-		case ":method":
-			h1.Method = header.Value
-		case ":scheme":
-		case ":authority":
-			// Otherwise the host header will be based on the origin URL
-			h1.Host = header.Value
-		case ":path":
-			u, err := url.Parse(header.Value)
-			if err != nil {
-				return fmt.Errorf("unparseable path")
-			}
-			resolved := h1.URL.ResolveReference(u)
-			// prevent escaping base URL
-			if !strings.HasPrefix(resolved.String(), h1.URL.String()) {
-				return fmt.Errorf("invalid path")
-			}
-			h1.URL = resolved
-		default:
-			h1.Header.Add(http.CanonicalHeaderKey(header.Name), header.Value)
-		}
-	}
-	return nil
-}
-
 func H1ResponseToH2Response(h1 *http.Response) (h2 []h2mux.Header) {
 	h2 = []h2mux.Header{{Name: ":status", Value: fmt.Sprintf("%d", h1.StatusCode)}}
 	for headerName, headerValues := range h1.Header {
@@ -437,10 +446,6 @@ func H1ResponseToH2Response(h1 *http.Response) (h2 []h2mux.Header) {
 	return
 }
 
-func FindCfRayHeader(h1 *http.Request) string {
-	return h1.Header.Get("Cf-Ray")
-}
-
 type TunnelHandler struct {
 	originUrl  string
 	muxer      *h2mux.Muxer
@@ -503,7 +508,7 @@ func NewTunnelHandler(ctx context.Context,
 		IsClient:           true,
 		HeartbeatInterval:  config.HeartbeatInterval,
 		MaxHeartbeats:      config.MaxHeartbeats,
-		Logger:             config.ProtocolLogger.WithFields(log.Fields{}),
+		Logger:             config.TransportLogger.WithFields(log.Fields{}),
 		CompressionQuality: h2mux.CompressionSetting(config.CompressionQuality),
 	})
 	if err != nil {
@@ -520,65 +525,93 @@ func (h *TunnelHandler) AppendTagHeaders(r *http.Request) {
 
 func (h *TunnelHandler) ServeStream(stream *h2mux.MuxedStream) error {
 	h.metrics.incrementRequests(h.connectionID)
+	defer h.metrics.decrementConcurrentRequests(h.connectionID)
+
+	req, reqErr := h.createRequest(stream)
+	if reqErr != nil {
+		h.logError(stream, reqErr)
+		return reqErr
+	}
+
+	cfRay := streamhandler.FindCfRayHeader(req)
+	lbProbe := streamhandler.IsLBProbeRequest(req)
+	h.logRequest(req, cfRay, lbProbe)
+
+	var resp *http.Response
+	var respErr error
+	if websocket.IsWebSocketUpgrade(req) {
+		resp, respErr = h.serveWebsocket(stream, req)
+	} else {
+		resp, respErr = h.serveHTTP(stream, req)
+	}
+	if respErr != nil {
+		h.logError(stream, respErr)
+		return respErr
+	}
+	h.logResponseOk(resp, cfRay, lbProbe)
+	return nil
+}
+
+func (h *TunnelHandler) createRequest(stream *h2mux.MuxedStream) (*http.Request, error) {
 	req, err := http.NewRequest("GET", h.originUrl, h2mux.MuxedStreamReader{MuxedStream: stream})
 	if err != nil {
-		h.logger.WithError(err).Panic("Unexpected error from http.NewRequest")
+		return nil, errors.Wrap(err, "Unexpected error from http.NewRequest")
 	}
-	err = H2RequestHeadersToH1Request(stream.Headers, req)
+	err = streamhandler.H2RequestHeadersToH1Request(stream.Headers, req)
 	if err != nil {
-		h.logger.WithError(err).Error("invalid request received")
+		return nil, errors.Wrap(err, "invalid request received")
 	}
 	h.AppendTagHeaders(req)
-	cfRay := FindCfRayHeader(req)
-	lbProbe := isLBProbeRequest(req)
-	h.logRequest(req, cfRay, lbProbe)
-	if websocket.IsWebSocketUpgrade(req) {
-		conn, response, err := websocket.ClientConnect(req, h.tlsConfig)
-		if err != nil {
-			h.logError(stream, err)
-		} else {
-			stream.WriteHeaders(H1ResponseToH2Response(response))
-			defer conn.Close()
-			// Copy to/from stream to the undelying connection. Use the underlying
-			// connection because cloudflared doesn't operate on the message themselves
-			websocket.Stream(conn.UnderlyingConn(), stream)
-			h.metrics.incrementResponses(h.connectionID, "200")
-			h.logResponse(response, cfRay, lbProbe)
-		}
-	} else {
-		// Support for WSGI Servers by switching transfer encoding from chunked to gzip/deflate
-		if h.noChunkedEncoding {
-			req.TransferEncoding = []string{"gzip", "deflate"}
-			cLength, err := strconv.Atoi(req.Header.Get("Content-Length"))
-			if err == nil {
-				req.ContentLength = int64(cLength)
-			}
-		}
+	return req, nil
+}
 
-		// Request origin to keep connection alive to improve performance
-		req.Header.Set("Connection", "keep-alive")
+func (h *TunnelHandler) serveWebsocket(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
+	conn, response, err := websocket.ClientConnect(req, h.tlsConfig)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	err = stream.WriteHeaders(H1ResponseToH2Response(response))
+	if err != nil {
+		return nil, errors.Wrap(err, "Error writing response header")
+	}
+	// Copy to/from stream to the undelying connection. Use the underlying
+	// connection because cloudflared doesn't operate on the message themselves
+	websocket.Stream(conn.UnderlyingConn(), stream)
+	return response, nil
+}
 
-		response, err := h.httpClient.RoundTrip(req)
-
-		if err != nil {
-			h.logError(stream, err)
-		} else {
-			defer response.Body.Close()
-			stream.WriteHeaders(H1ResponseToH2Response(response))
-			if h.isEventStream(response) {
-				h.writeEventStream(stream, response.Body)
-			} else {
-				// Use CopyBuffer, because Copy only allocates a 32KiB buffer, and cross-stream
-				// compression generates dictionary on first write
-				io.CopyBuffer(stream, response.Body, make([]byte, 512*1024))
-			}
-
-			h.metrics.incrementResponses(h.connectionID, "200")
-			h.logResponse(response, cfRay, lbProbe)
+func (h *TunnelHandler) serveHTTP(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
+	// Support for WSGI Servers by switching transfer encoding from chunked to gzip/deflate
+	if h.noChunkedEncoding {
+		req.TransferEncoding = []string{"gzip", "deflate"}
+		cLength, err := strconv.Atoi(req.Header.Get("Content-Length"))
+		if err == nil {
+			req.ContentLength = int64(cLength)
 		}
 	}
-	h.metrics.decrementConcurrentRequests(h.connectionID)
-	return nil
+
+	// Request origin to keep connection alive to improve performance
+	req.Header.Set("Connection", "keep-alive")
+
+	response, err := h.httpClient.RoundTrip(req)
+	if err != nil {
+		return nil, errors.Wrap(err, "Error proxying request to origin")
+	}
+	defer response.Body.Close()
+
+	err = stream.WriteHeaders(H1ResponseToH2Response(response))
+	if err != nil {
+		return nil, errors.Wrap(err, "Error writing response header")
+	}
+	if h.isEventStream(response) {
+		h.writeEventStream(stream, response.Body)
+	} else {
+		// Use CopyBuffer, because Copy only allocates a 32KiB buffer, and cross-stream
+		// compression generates dictionary on first write
+		io.CopyBuffer(stream, response.Body, make([]byte, 512*1024))
+	}
+	return response, nil
 }
 
 func (h *TunnelHandler) writeEventStream(stream *h2mux.MuxedStream, responseBody io.ReadCloser) {
@@ -608,25 +641,42 @@ func (h *TunnelHandler) logError(stream *h2mux.MuxedStream, err error) {
 }
 
 func (h *TunnelHandler) logRequest(req *http.Request, cfRay string, lbProbe bool) {
+	logger := log.NewEntry(h.logger)
 	if cfRay != "" {
-		h.logger.WithField("CF-RAY", cfRay).Debugf("%s %s %s", req.Method, req.URL, req.Proto)
+		logger = logger.WithField("CF-RAY", cfRay)
+		logger.Debugf("%s %s %s", req.Method, req.URL, req.Proto)
 	} else if lbProbe {
-		h.logger.Debugf("Load Balancer health check %s %s %s", req.Method, req.URL, req.Proto)
+		logger.Debugf("Load Balancer health check %s %s %s", req.Method, req.URL, req.Proto)
 	} else {
-		h.logger.Warnf("All requests should have a CF-RAY header. Please open a support ticket with Cloudflare. %s %s %s ", req.Method, req.URL, req.Proto)
+		logger.Warnf("All requests should have a CF-RAY header. Please open a support ticket with Cloudflare. %s %s %s ", req.Method, req.URL, req.Proto)
+	}
+	logger.Debugf("Request Headers %+v", req.Header)
+
+	if contentLen := req.ContentLength; contentLen == -1 {
+		logger.Debugf("Request Content length unknown")
+	} else {
+		logger.Debugf("Request content length %d", contentLen)
 	}
-	h.logger.Debugf("Request Headers %+v", req.Header)
 }
 
-func (h *TunnelHandler) logResponse(r *http.Response, cfRay string, lbProbe bool) {
+func (h *TunnelHandler) logResponseOk(r *http.Response, cfRay string, lbProbe bool) {
+	h.metrics.incrementResponses(h.connectionID, "200")
+	logger := log.NewEntry(h.logger)
 	if cfRay != "" {
-		h.logger.WithField("CF-RAY", cfRay).Debugf("%s", r.Status)
+		logger = logger.WithField("CF-RAY", cfRay)
+		logger.Debugf("%s", r.Status)
 	} else if lbProbe {
-		h.logger.Debugf("Response to Load Balancer health check %s", r.Status)
+		logger.Debugf("Response to Load Balancer health check %s", r.Status)
 	} else {
-		h.logger.Infof("%s", r.Status)
+		logger.Infof("%s", r.Status)
+	}
+	logger.Debugf("Response Headers %+v", r.Header)
+
+	if contentLen := r.ContentLength; contentLen == -1 {
+		logger.Debugf("Response content length unknown")
+	} else {
+		logger.Debugf("Response content length %d", contentLen)
 	}
-	h.logger.Debugf("Response Headers %+v", r.Header)
 }
 
 func (h *TunnelHandler) UpdateMetrics(connectionID string) {
@@ -637,10 +687,6 @@ func uint8ToString(input uint8) string {
 	return strconv.FormatUint(uint64(input), 10)
 }
 
-func isLBProbeRequest(req *http.Request) bool {
-	return strings.HasPrefix(req.UserAgent(), lbProbeUserAgentPrefix)
-}
-
 // Print out the given lines in a nice ASCII box.
 func asciiBox(lines []string, padding int) (box []string) {
 	maxLen := maxLen(lines)
@@ -672,3 +718,17 @@ func trialZoneMsg(url string) []string {
 		"  " + url,
 	}
 }
+
+func activeIncidentsMsg(incidents []Incident) string {
+	preamble := "There is an active Cloudflare incident that may be related:"
+	if len(incidents) > 1 {
+		preamble = "There are active Cloudflare incidents that may be related:"
+	}
+	incidentStrings := []string{}
+	for _, incident := range incidents {
+		incidentString := fmt.Sprintf("%s (%s)", incident.Name, incident.URL())
+		incidentStrings = append(incidentStrings, incidentString)
+	}
+	return preamble + " " + strings.Join(incidentStrings, "; ")
+
+}

origin/tunnelsforha.go

@@ -0,0 +1,50 @@
+package origin
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+// tunnelsForHA maps this cloudflared instance's HA connections to the tunnel IDs they serve.
+type tunnelsForHA struct {
+	sync.Mutex
+	metrics *prometheus.GaugeVec
+	entries map[uint8]string
+}
+
+// NewTunnelsForHA initializes the Prometheus metrics etc for a tunnelsForHA.
+func NewTunnelsForHA() tunnelsForHA {
+	metrics := prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "tunnel_ids",
+			Help: "The ID of all tunnels (and their corresponding HA connection ID) running in this instance of cloudflared.",
+		},
+		[]string{"tunnel_id", "ha_conn_id"},
+	)
+	prometheus.MustRegister(metrics)
+
+	return tunnelsForHA{
+		metrics: metrics,
+		entries: make(map[uint8]string),
+	}
+}
+
+// Track a new tunnel ID, removing the disconnected tunnel (if any) and update metrics.
+func (t *tunnelsForHA) AddTunnelID(haConn uint8, tunnelID string) {
+	t.Lock()
+	defer t.Unlock()
+	haStr := fmt.Sprintf("%v", haConn)
+	if oldTunnelID, ok := t.entries[haConn]; ok {
+		t.metrics.WithLabelValues(oldTunnelID, haStr).Dec()
+	}
+	t.entries[haConn] = tunnelID
+	t.metrics.WithLabelValues(tunnelID, haStr).Inc()
+}
+
+func (t *tunnelsForHA) String() string {
+	t.Lock()
+	defer t.Unlock()
+	return fmt.Sprintf("%v", t.entries)
+}

originservice/originservice.go

@@ -0,0 +1,235 @@
+// Package client defines and implements interface to proxy to HTTP, websocket and hello world origins
+package originservice
+
+import (
+	"bufio"
+	"crypto/tls"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/hello"
+	"github.com/cloudflare/cloudflared/log"
+	"github.com/cloudflare/cloudflared/websocket"
+
+	"github.com/pkg/errors"
+)
+
+// OriginService is an interface to proxy requests to different type of origins
+type OriginService interface {
+	Proxy(stream *h2mux.MuxedStream, req *http.Request) (resp *http.Response, err error)
+	URL() *url.URL
+	Summary() string
+	Shutdown()
+}
+
+// HTTPService talks to origin using HTTP/HTTPS
+type HTTPService struct {
+	client          http.RoundTripper
+	originURL       *url.URL
+	chunkedEncoding bool
+}
+
+func NewHTTPService(transport http.RoundTripper, url *url.URL, chunkedEncoding bool) OriginService {
+	return &HTTPService{
+		client:          transport,
+		originURL:       url,
+		chunkedEncoding: chunkedEncoding,
+	}
+}
+
+func (hc *HTTPService) Proxy(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
+	// Support for WSGI Servers by switching transfer encoding from chunked to gzip/deflate
+	if !hc.chunkedEncoding {
+		req.TransferEncoding = []string{"gzip", "deflate"}
+		cLength, err := strconv.Atoi(req.Header.Get("Content-Length"))
+		if err == nil {
+			req.ContentLength = int64(cLength)
+		}
+	}
+
+	// Request origin to keep connection alive to improve performance
+	req.Header.Set("Connection", "keep-alive")
+
+	resp, err := hc.client.RoundTrip(req)
+	if err != nil {
+		return nil, errors.Wrap(err, "error proxying request to HTTP origin")
+	}
+	defer resp.Body.Close()
+
+	err = stream.WriteHeaders(h1ResponseToH2Response(resp))
+	if err != nil {
+		return nil, errors.Wrap(err, "error writing response header to HTTP origin")
+	}
+	if isEventStream(resp) {
+		writeEventStream(stream, resp.Body)
+	} else {
+		// Use CopyBuffer, because Copy only allocates a 32KiB buffer, and cross-stream
+		// compression generates dictionary on first write
+		io.CopyBuffer(stream, resp.Body, make([]byte, 512*1024))
+	}
+	return resp, nil
+}
+
+func (hc *HTTPService) URL() *url.URL {
+	return hc.originURL
+}
+
+func (hc *HTTPService) Summary() string {
+	return fmt.Sprintf("HTTP service listening on %s", hc.originURL)
+}
+
+func (hc *HTTPService) Shutdown() {}
+
+// WebsocketService talks to origin using WS/WSS
+type WebsocketService struct {
+	tlsConfig *tls.Config
+	originURL *url.URL
+	shutdownC chan struct{}
+}
+
+func NewWebSocketService(tlsConfig *tls.Config, url *url.URL) (OriginService, error) {
+	listener, err := net.Listen("tcp", "127.0.0.1:")
+	if err != nil {
+		return nil, errors.Wrap(err, "cannot start Websocket Proxy Server")
+	}
+	shutdownC := make(chan struct{})
+	go func() {
+		websocket.StartProxyServer(log.CreateLogger(), listener, url.String(), shutdownC)
+	}()
+	return &WebsocketService{
+		tlsConfig: tlsConfig,
+		originURL: url,
+		shutdownC: shutdownC,
+	}, nil
+}
+
+func (wsc *WebsocketService) Proxy(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
+	if !websocket.IsWebSocketUpgrade(req) {
+		return nil, fmt.Errorf("request is not a websocket connection")
+	}
+	conn, response, err := websocket.ClientConnect(req, wsc.tlsConfig)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	err = stream.WriteHeaders(h1ResponseToH2Response(response))
+	if err != nil {
+		return nil, errors.Wrap(err, "error writing response header to websocket origin")
+	}
+	// Copy to/from stream to the undelying connection. Use the underlying
+	// connection because cloudflared doesn't operate on the message themselves
+	websocket.Stream(conn.UnderlyingConn(), stream)
+	return response, nil
+}
+
+func (wsc *WebsocketService) URL() *url.URL {
+	return wsc.originURL
+}
+
+func (wsc *WebsocketService) Summary() string {
+	return fmt.Sprintf("Websocket listening on %s", wsc.originURL)
+}
+
+func (wsc *WebsocketService) Shutdown() {
+	close(wsc.shutdownC)
+}
+
+// HelloWorldService talks to the hello world example origin
+type HelloWorldService struct {
+	client    http.RoundTripper
+	listener  net.Listener
+	originURL *url.URL
+	shutdownC chan struct{}
+}
+
+func NewHelloWorldService(transport http.RoundTripper) (OriginService, error) {
+	listener, err := hello.CreateTLSListener("127.0.0.1:")
+	if err != nil {
+		return nil, errors.Wrap(err, "cannot start Hello World Server")
+	}
+	shutdownC := make(chan struct{})
+	go func() {
+		hello.StartHelloWorldServer(log.CreateLogger(), listener, shutdownC)
+	}()
+	return &HelloWorldService{
+		client:   transport,
+		listener: listener,
+		originURL: &url.URL{
+			Scheme: "https",
+			Host:   listener.Addr().String(),
+		},
+		shutdownC: shutdownC,
+	}, nil
+}
+
+func (hwc *HelloWorldService) Proxy(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
+	// Request origin to keep connection alive to improve performance
+	req.Header.Set("Connection", "keep-alive")
+	resp, err := hwc.client.RoundTrip(req)
+	if err != nil {
+		return nil, errors.Wrap(err, "error proxying request to Hello World origin")
+	}
+	defer resp.Body.Close()
+
+	err = stream.WriteHeaders(h1ResponseToH2Response(resp))
+	if err != nil {
+		return nil, errors.Wrap(err, "error writing response header to Hello World origin")
+	}
+
+	// Use CopyBuffer, because Copy only allocates a 32KiB buffer, and cross-stream
+	// compression generates dictionary on first write
+	io.CopyBuffer(stream, resp.Body, make([]byte, 512*1024))
+
+	return resp, nil
+}
+
+func (hwc *HelloWorldService) URL() *url.URL {
+	return hwc.originURL
+}
+
+func (hwc *HelloWorldService) Summary() string {
+	return fmt.Sprintf("Hello World service listening on %s", hwc.originURL)
+}
+
+func (hwc *HelloWorldService) Shutdown() {
+	hwc.listener.Close()
+}
+
+func isEventStream(resp *http.Response) bool {
+	// Check if content-type is text/event-stream. We need to check if the header value starts with text/event-stream
+	// because text/event-stream; charset=UTF-8 is also valid
+	// Ref: https://tools.ietf.org/html/rfc7231#section-3.1.1.1
+	for _, contentType := range resp.Header["content-type"] {
+		if strings.HasPrefix(strings.ToLower(contentType), "text/event-stream") {
+			return true
+		}
+	}
+	return false
+}
+
+func writeEventStream(stream *h2mux.MuxedStream, respBody io.ReadCloser) {
+	reader := bufio.NewReader(respBody)
+	for {
+		line, err := reader.ReadBytes('\n')
+		if err != nil {
+			break
+		}
+		stream.Write(line)
+	}
+}
+
+func h1ResponseToH2Response(h1 *http.Response) (h2 []h2mux.Header) {
+	h2 = []h2mux.Header{{Name: ":status", Value: fmt.Sprintf("%d", h1.StatusCode)}}
+	for headerName, headerValues := range h1.Header {
+		for _, headerValue := range headerValues {
+			h2 = append(h2, h2mux.Header{Name: strings.ToLower(headerName), Value: headerValue})
+		}
+	}
+	return
+}

originservice/originservice_test.go

@@ -0,0 +1,60 @@
+package originservice
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsEventStream(t *testing.T) {
+	tests := []struct {
+		resp          *http.Response
+		isEventStream bool
+	}{
+		{
+			resp:          &http.Response{},
+			isEventStream: false,
+		},
+		{
+			// isEventStream checks all headers
+			resp: &http.Response{
+				Header: http.Header{
+					"accept":       []string{"text/html"},
+					"content-type": []string{"text/event-stream"},
+				},
+			},
+			isEventStream: true,
+		},
+		{
+			// Content-Type and text/event-stream are case-insensitive. text/event-stream can be followed by OWS parameter
+			resp: &http.Response{
+				Header: http.Header{
+					"content-type": []string{"Text/event-stream;charset=utf-8"},
+				},
+			},
+			isEventStream: true,
+		},
+		{
+			// Content-Type and text/event-stream are case-insensitive. text/event-stream can be followed by OWS parameter
+			resp: &http.Response{
+				Header: http.Header{
+					"content-type": []string{"appication/json", "text/html", "Text/event-stream;charset=utf-8"},
+				},
+			},
+			isEventStream: true,
+		},
+		{
+			// Not an event stream because the content-type value doesn't start with text/event-stream
+			resp: &http.Response{
+				Header: http.Header{
+					"content-type": []string{" text/event-stream"},
+				},
+			},
+			isEventStream: false,
+		},
+	}
+	for _, test := range tests {
+		assert.Equal(t, test.isEventStream, isEventStream(test.resp), "Header: %v", test.resp.Header)
+	}
+}

signal/safe_signal.go

@@ -0,0 +1,33 @@
+package signal
+
+import (
+	"sync"
+)
+
+// Signal lets goroutines signal that some event has occurred. Other goroutines can wait for the signal.
+type Signal struct {
+	ch   chan struct{}
+	once sync.Once
+}
+
+// New wraps a channel and turns it into a signal for a one-time event.
+func New(ch chan struct{}) *Signal {
+	return &Signal{
+		ch:   ch,
+		once: sync.Once{},
+	}
+}
+
+// Notify alerts any goroutines waiting on this signal that the event has occurred.
+// After the first call to Notify(), future calls are no-op.
+func (s *Signal) Notify() {
+	s.once.Do(func() {
+		close(s.ch)
+	})
+}
+
+// Wait returns a channel which will be written to when Notify() is called for the first time.
+// This channel will never be written to a second time.
+func (s *Signal) Wait() <-chan struct{} {
+	return s.ch
+}

signal/safe_signal_test.go

@@ -0,0 +1,25 @@
+package signal
+
+import (
+	"testing"
+)
+
+func TestMultiNotifyDoesntCrash(t *testing.T) {
+	sig := New(make(chan struct{}))
+	sig.Notify()
+	sig.Notify()
+	// If code has reached here without crashing, the test has passed.
+}
+
+func TestWait(t *testing.T) {
+	sig := New(make(chan struct{}))
+	sig.Notify()
+	select {
+	case <-sig.Wait():
+		// Test succeeds
+		return
+	default:
+		// sig.Wait() should have been read from, because sig.Notify() wrote to it.
+		t.Fail()
+	}
+}

sshgen/sshgen.go

@@ -0,0 +1,188 @@
+package sshgen
+
+import (
+	"bytes"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/x509"
+	"encoding/json"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	cfpath "github.com/cloudflare/cloudflared/cmd/cloudflared/path"
+	homedir "github.com/mitchellh/go-homedir"
+	gossh "golang.org/x/crypto/ssh"
+	"gopkg.in/coreos/go-oidc.v1/jose"
+)
+
+const (
+	signEndpoint = "/cdn-cgi/access/cert_sign"
+	keyName      = "cf_key"
+)
+
+// signPayload represents the request body sent to the sign handler API
+type signPayload struct {
+	PublicKey string `json:"public_key"`
+	JWT       string `json:"jwt"`
+	Issuer    string `json:"issuer"`
+}
+
+// signResponse represents the response body from the sign handler API
+type signResponse struct {
+	KeyID       string    `json:"id"`
+	Certificate string    `json:"certificate"`
+	ExpiresAt   time.Time `json:"expires_at"`
+}
+
+// ErrorResponse struct stores error information after any error-prone function
+type errorResponse struct {
+	Status  int    `json:"status"`
+	Message string `json:"message"`
+}
+
+var mockRequest func(url, contentType string, body io.Reader) (*http.Response, error) = nil
+
+// GenerateShortLivedCertificate generates and stores a keypair for short lived certs
+func GenerateShortLivedCertificate(appURL *url.URL, token string) error {
+	fullName, err := cfpath.GenerateFilePathFromURL(appURL, keyName)
+	if err != nil {
+		return err
+	}
+
+	cert, err := handleCertificateGeneration(token, fullName)
+	if err != nil {
+		return err
+	}
+
+	name := fullName + "-cert.pub"
+	if err := writeKey(name, []byte(cert)); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// handleCertificateGeneration takes a JWT and uses it build a signPayload
+// to send to the Sign endpoint with the public key from the keypair it generated
+func handleCertificateGeneration(token, fullName string) (string, error) {
+	if token == "" {
+		return "", errors.New("invalid token")
+	}
+
+	jwt, err := jose.ParseJWT(token)
+	if err != nil {
+		return "", err
+	}
+
+	claims, err := jwt.Claims()
+	if err != nil {
+		return "", err
+	}
+
+	issuer, _, err := claims.StringClaim("iss")
+	if err != nil {
+		return "", err
+	}
+
+	pub, err := generateKeyPair(fullName)
+	if err != nil {
+		return "", err
+	}
+
+	buf, err := json.Marshal(&signPayload{
+		PublicKey: string(pub),
+		JWT:       token,
+		Issuer:    issuer,
+	})
+	if err != nil {
+		return "", err
+	}
+
+	var res *http.Response
+	if mockRequest != nil {
+		res, err = mockRequest(issuer+signEndpoint, "application/json", bytes.NewBuffer(buf))
+	} else {
+		res, err = http.Post(issuer+signEndpoint, "application/json", bytes.NewBuffer(buf))
+	}
+
+	if err != nil {
+		return "", err
+	}
+	defer res.Body.Close()
+
+	decoder := json.NewDecoder(res.Body)
+
+	if res.StatusCode != 200 {
+		var errResponse errorResponse
+		if err := decoder.Decode(&errResponse); err != nil {
+			return "", err
+		}
+		return "", fmt.Errorf("%d: %s", errResponse.Status, errResponse.Message)
+	}
+
+	var signRes signResponse
+	if err := decoder.Decode(&signRes); err != nil {
+		return "", err
+	}
+	return signRes.Certificate, err
+}
+
+// generateKeyPair creates a EC keypair (P256) and stores them in the homedir.
+// returns the generated public key from the successful keypair generation
+func generateKeyPair(fullName string) ([]byte, error) {
+	pubKeyName := fullName + ".pub"
+
+	exist, err := config.FileExists(pubKeyName)
+	if err != nil {
+		return nil, err
+	}
+	if exist {
+		return ioutil.ReadFile(pubKeyName)
+	}
+
+	key, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
+	if err != nil {
+		return nil, err
+	}
+	parsed, err := x509.MarshalECPrivateKey(key)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := writeKey(fullName, pem.EncodeToMemory(&pem.Block{
+		Type:  "EC PRIVATE KEY",
+		Bytes: parsed,
+	})); err != nil {
+		return nil, err
+	}
+
+	pub, err := gossh.NewPublicKey(&key.PublicKey)
+	if err != nil {
+		return nil, err
+	}
+	data := gossh.MarshalAuthorizedKey(pub)
+
+	if err := writeKey(pubKeyName, data); err != nil {
+		return nil, err
+	}
+
+	return data, nil
+}
+
+// writeKey will write a key to disk in DER format (it's a standard pem key)
+func writeKey(filename string, data []byte) error {
+	filepath, err := homedir.Expand(filename)
+	if err != nil {
+		return err
+	}
+
+	return ioutil.WriteFile(filepath, data, 0600)
+}

sshgen/sshgen_test.go

@@ -0,0 +1,112 @@
+package sshgen
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	cfpath "github.com/cloudflare/cloudflared/cmd/cloudflared/path"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/coreos/go-oidc.v1/jose"
+)
+
+const (
+	audTest   = "cf-test-aud"
+	nonceTest = "asfd"
+)
+
+type signingArguments struct {
+	Principals   []string `json:"principals"`
+	ClientPubKey string   `json:"public_key"`
+	Duration     string   `json:"duration"`
+}
+
+func TestCertGenSuccess(t *testing.T) {
+	url, _ := url.Parse("https://cf-test-access.com/testpath")
+	token := tokenGenerator()
+
+	fullName, err := cfpath.GenerateFilePathFromURL(url, keyName)
+	assert.NoError(t, err)
+
+	pubKeyName := fullName + ".pub"
+	certKeyName := fullName + "-cert.pub"
+
+	defer func() {
+		os.Remove(fullName)
+		os.Remove(pubKeyName)
+		os.Remove(certKeyName)
+	}()
+
+	resp := signingArguments{
+		Principals:   []string{"dalton"},
+		ClientPubKey: "ecdsa-sha2-nistp256-cert-v01@openssh.com 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",
+		Duration:     "3m",
+	}
+	w := httptest.NewRecorder()
+	respJson, err := json.Marshal(resp)
+	assert.NoError(t, err)
+	w.Write(respJson)
+	mockRequest = func(url, contentType string, body io.Reader) (*http.Response, error) {
+		assert.Contains(t, "/cdn-cgi/access/cert_sign", url)
+		assert.Equal(t, "application/json", contentType)
+		buf, err := ioutil.ReadAll(body)
+		assert.NoError(t, err)
+		assert.NotEmpty(t, buf)
+		return w.Result(), nil
+	}
+
+	err = GenerateShortLivedCertificate(url, token)
+	assert.NoError(t, err)
+
+	exist, err := config.FileExists(fullName)
+	assert.NoError(t, err)
+	if !exist {
+		assert.FailNow(t, fmt.Sprintf("key should exist at: %s", fullName), fullName)
+		return
+	}
+
+	exist, err = config.FileExists(pubKeyName)
+	assert.NoError(t, err)
+	if !exist {
+		assert.FailNow(t, fmt.Sprintf("key should exist at: %s", pubKeyName), pubKeyName)
+		return
+	}
+
+	exist, err = config.FileExists(certKeyName)
+	assert.NoError(t, err)
+	if !exist {
+		assert.FailNow(t, fmt.Sprintf("key should exist at: %s", certKeyName), certKeyName)
+		return
+	}
+}
+
+func tokenGenerator() string {
+	iat := time.Now().Unix()
+	exp := time.Now().Add(time.Minute * 5).Unix()
+	claims := jose.Claims{}
+	claims.Add("aud", audTest)
+	claims.Add("iat", iat)
+	claims.Add("nonce", nonceTest)
+	claims.Add("exp", exp)
+
+	k, err := rsa.GenerateKey(rand.Reader, 512)
+	if err != nil {
+		return ""
+	}
+	signer := jose.NewSignerRSA("asdf", *k)
+	token, terr := jose.NewSignedJWT(claims, signer)
+	if terr != nil {
+		return ""
+	}
+	return token.Encode()
+}

streamhandler/request.go

@@ -0,0 +1,66 @@
+package streamhandler
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"strconv"
+	"strings"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/pkg/errors"
+)
+
+const (
+	lbProbeUserAgentPrefix = "Mozilla/5.0 (compatible; Cloudflare-Traffic-Manager/1.0; +https://www.cloudflare.com/traffic-manager/;"
+)
+
+func FindCfRayHeader(h1 *http.Request) string {
+	return h1.Header.Get("Cf-Ray")
+}
+
+func IsLBProbeRequest(req *http.Request) bool {
+	return strings.HasPrefix(req.UserAgent(), lbProbeUserAgentPrefix)
+}
+
+func createRequest(stream *h2mux.MuxedStream, url *url.URL) (*http.Request, error) {
+	req, err := http.NewRequest(http.MethodGet, url.String(), h2mux.MuxedStreamReader{MuxedStream: stream})
+	if err != nil {
+		return nil, errors.Wrap(err, "unexpected error from http.NewRequest")
+	}
+	err = H2RequestHeadersToH1Request(stream.Headers, req)
+	if err != nil {
+		return nil, errors.Wrap(err, "invalid request received")
+	}
+	return req, nil
+}
+
+func H2RequestHeadersToH1Request(h2 []h2mux.Header, h1 *http.Request) error {
+	for _, header := range h2 {
+		switch header.Name {
+		case ":method":
+			h1.Method = header.Value
+		case ":scheme":
+		case ":authority":
+			// Otherwise the host header will be based on the origin URL
+			h1.Host = header.Value
+		case ":path":
+			// Separate the path and the (optional) query from each other
+			chunks := strings.SplitN(header.Value, "?", 2)
+
+			h1.URL.Path = chunks[0]
+			if len(chunks) > 1 {
+				h1.URL.RawQuery = chunks[1]
+			}
+		case "content-length":
+			contentLength, err := strconv.ParseInt(header.Value, 10, 64)
+			if err != nil {
+				return fmt.Errorf("unparseable content length")
+			}
+			h1.ContentLength = contentLength
+		default:
+			h1.Header.Add(http.CanonicalHeaderKey(header.Name), header.Value)
+		}
+	}
+	return nil
+}

streamhandler/request_test.go

@@ -0,0 +1,104 @@
+package streamhandler
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestH2RequestHeadersToH1Request_RegularHeaders(t *testing.T) {
+	request, err := http.NewRequest(http.MethodGet, "http://example.com", nil)
+	assert.NoError(t, err)
+
+	headersConversionErr := H2RequestHeadersToH1Request(
+		[]h2mux.Header{
+			h2mux.Header{
+				Name:  "Mock header 1",
+				Value: "Mock value 1",
+			},
+			h2mux.Header{
+				Name:  "Mock header 2",
+				Value: "Mock value 2",
+			},
+		},
+		request,
+	)
+
+	assert.Equal(t, http.Header{
+		"Mock header 1": []string{"Mock value 1"},
+		"Mock header 2": []string{"Mock value 2"},
+	}, request.Header)
+
+	assert.NoError(t, headersConversionErr)
+}
+
+func TestH2RequestHeadersToH1Request_NoHeaders(t *testing.T) {
+	request, err := http.NewRequest(http.MethodGet, "http://example.com", nil)
+	assert.NoError(t, err)
+
+	headersConversionErr := H2RequestHeadersToH1Request(
+		[]h2mux.Header{},
+		request,
+	)
+
+	assert.Equal(t, http.Header{}, request.Header)
+
+	assert.NoError(t, headersConversionErr)
+}
+
+func TestH2RequestHeadersToH1Request_InvalidHostPath(t *testing.T) {
+	request, err := http.NewRequest(http.MethodGet, "http://example.com", nil)
+	assert.NoError(t, err)
+
+	headersConversionErr := H2RequestHeadersToH1Request(
+		[]h2mux.Header{
+			h2mux.Header{
+				Name:  ":path",
+				Value: "//bad_path/",
+			},
+			h2mux.Header{
+				Name:  "Mock header",
+				Value: "Mock value",
+			},
+		},
+		request,
+	)
+
+	assert.Equal(t, http.Header{
+		"Mock header": []string{"Mock value"},
+	}, request.Header)
+
+	assert.Equal(t, "http://example.com//bad_path/", request.URL.String())
+
+	assert.NoError(t, headersConversionErr)
+}
+
+func TestH2RequestHeadersToH1Request_HostPathWithQuery(t *testing.T) {
+	request, err := http.NewRequest(http.MethodGet, "http://example.com/", nil)
+	assert.NoError(t, err)
+
+	headersConversionErr := H2RequestHeadersToH1Request(
+		[]h2mux.Header{
+			h2mux.Header{
+				Name:  ":path",
+				Value: "/?query",
+			},
+			h2mux.Header{
+				Name:  "Mock header",
+				Value: "Mock value",
+			},
+		},
+		request,
+	)
+
+	assert.Equal(t, http.Header{
+		"Mock header": []string{"Mock value"},
+	}, request.Header)
+
+	assert.Equal(t, "http://example.com/?query", request.URL.String())
+
+	assert.NoError(t, headersConversionErr)
+}

streamhandler/stream_handler.go

@@ -0,0 +1,183 @@
+package streamhandler
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/tunnelhostnamemapper"
+	"github.com/cloudflare/cloudflared/tunnelrpc"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"zombiezen.com/go/capnproto2/rpc"
+)
+
+const (
+	statusPseudoHeader = ":status"
+)
+
+type httpErrorStatus struct {
+	status string
+	text   []byte
+}
+
+var (
+	statusBadRequest = newHTTPErrorStatus(http.StatusBadRequest)
+	statusNotFound   = newHTTPErrorStatus(http.StatusNotFound)
+	statusBadGateway = newHTTPErrorStatus(http.StatusBadGateway)
+)
+
+func newHTTPErrorStatus(status int) *httpErrorStatus {
+	return &httpErrorStatus{
+		status: strconv.Itoa(status),
+		text:   []byte(http.StatusText(status)),
+	}
+}
+
+// StreamHandler handles new stream opened by the edge. The streams can be used to proxy requests or make RPC.
+type StreamHandler struct {
+	// newConfigChan is a send-only channel to notify Supervisor of a new ClientConfig
+	newConfigChan chan<- *pogs.ClientConfig
+	// useConfigResultChan is a receive-only channel for Supervisor to communicate the result of applying a new ClientConfig
+	useConfigResultChan <-chan *pogs.UseConfigurationResult
+	// originMapper maps tunnel hostname to origin service
+	tunnelHostnameMapper *tunnelhostnamemapper.TunnelHostnameMapper
+	logger               *logrus.Entry
+}
+
+// NewStreamHandler creates a new StreamHandler
+func NewStreamHandler(newConfigChan chan<- *pogs.ClientConfig,
+	useConfigResultChan <-chan *pogs.UseConfigurationResult,
+	logger *logrus.Logger,
+) *StreamHandler {
+	return &StreamHandler{
+		newConfigChan:        newConfigChan,
+		useConfigResultChan:  useConfigResultChan,
+		tunnelHostnameMapper: tunnelhostnamemapper.NewTunnelHostnameMapper(),
+		logger:               logger.WithField("subsystem", "streamHandler"),
+	}
+}
+
+// UseConfiguration implements ClientService
+func (s *StreamHandler) UseConfiguration(ctx context.Context, config *pogs.ClientConfig) (*pogs.UseConfigurationResult, error) {
+	select {
+	case <-ctx.Done():
+		err := fmt.Errorf("Timeout while sending new config to Supervisor")
+		s.logger.Error(err)
+		return nil, err
+	case s.newConfigChan <- config:
+	}
+	select {
+	case <-ctx.Done():
+		err := fmt.Errorf("Timeout applying new configuration")
+		s.logger.Error(err)
+		return nil, err
+	case result := <-s.useConfigResultChan:
+		return result, nil
+	}
+}
+
+// UpdateConfig replaces current originmapper mapping with mappings from newConfig
+func (s *StreamHandler) UpdateConfig(newConfig []*pogs.ReverseProxyConfig) (failedConfigs []*pogs.FailedConfig) {
+	// TODO: TUN-1968: Gracefully apply new config
+	s.tunnelHostnameMapper.DeleteAll()
+	for _, tunnelConfig := range newConfig {
+		tunnelHostname := tunnelConfig.TunnelHostname
+		originSerice, err := tunnelConfig.OriginConfigJSONHandler.OriginConfig.Service()
+		if err != nil {
+			s.logger.WithField("tunnelHostname", tunnelHostname).WithError(err).Error("Invalid origin service config")
+			failedConfigs = append(failedConfigs, &pogs.FailedConfig{
+				Config: tunnelConfig,
+				Reason: tunnelConfig.FailReason(err),
+			})
+			continue
+		}
+		s.tunnelHostnameMapper.Add(tunnelConfig.TunnelHostname, originSerice)
+		s.logger.WithField("tunnelHostname", tunnelHostname).Infof("New origin service config: %v", originSerice.Summary())
+	}
+	return
+}
+
+// ServeStream implements MuxedStreamHandler interface
+func (s *StreamHandler) ServeStream(stream *h2mux.MuxedStream) error {
+	if stream.IsRPCStream() {
+		return s.serveRPC(stream)
+	}
+	if err := s.serveRequest(stream); err != nil {
+		s.logger.Error(err)
+		return err
+	}
+	return nil
+}
+
+func (s *StreamHandler) serveRPC(stream *h2mux.MuxedStream) error {
+	stream.WriteHeaders([]h2mux.Header{{Name: ":status", Value: "200"}})
+	main := pogs.ClientService_ServerToClient(s)
+	rpcLogger := s.logger.WithField("subsystem", "clientserver-rpc")
+	rpcConn := rpc.NewConn(
+		tunnelrpc.NewTransportLogger(rpcLogger, rpc.StreamTransport(stream)),
+		rpc.MainInterface(main.Client),
+		tunnelrpc.ConnLog(s.logger.WithField("subsystem", "clientserver-rpc-transport")),
+	)
+	return rpcConn.Wait()
+}
+
+func (s *StreamHandler) serveRequest(stream *h2mux.MuxedStream) error {
+	tunnelHostname := stream.TunnelHostname()
+	if !tunnelHostname.IsSet() {
+		s.writeErrorStatus(stream, statusBadRequest)
+		return fmt.Errorf("stream doesn't have tunnelHostname")
+	}
+
+	originService, ok := s.tunnelHostnameMapper.Get(tunnelHostname)
+	if !ok {
+		s.writeErrorStatus(stream, statusNotFound)
+		return fmt.Errorf("cannot map tunnel hostname %s to origin", tunnelHostname)
+	}
+
+	req, err := createRequest(stream, originService.URL())
+	if err != nil {
+		s.writeErrorStatus(stream, statusBadRequest)
+		return errors.Wrap(err, "cannot create request")
+	}
+
+	logger := s.requestLogger(req, tunnelHostname)
+	logger.Debugf("Request Headers %+v", req.Header)
+
+	resp, err := originService.Proxy(stream, req)
+	if err != nil {
+		s.writeErrorStatus(stream, statusBadGateway)
+		return errors.Wrap(err, "cannot proxy request")
+	}
+
+	logger.WithField("status", resp.Status).Debugf("Response Headers %+v", resp.Header)
+	return nil
+}
+
+func (s *StreamHandler) requestLogger(req *http.Request, tunnelHostname h2mux.TunnelHostname) *logrus.Entry {
+	cfRay := FindCfRayHeader(req)
+	lbProbe := IsLBProbeRequest(req)
+	logger := s.logger.WithField("tunnelHostname", tunnelHostname)
+	if cfRay != "" {
+		logger = logger.WithField("CF-RAY", cfRay)
+		logger.Debugf("%s %s %s", req.Method, req.URL, req.Proto)
+	} else if lbProbe {
+		logger.Debugf("Load Balancer health check %s %s %s", req.Method, req.URL, req.Proto)
+	} else {
+		logger.Warnf("Requests %v does not have CF-RAY header. Please open a support ticket with Cloudflare.", req)
+	}
+	return logger
+}
+
+func (s *StreamHandler) writeErrorStatus(stream *h2mux.MuxedStream, status *httpErrorStatus) {
+	stream.WriteHeaders([]h2mux.Header{
+		{
+			Name:  statusPseudoHeader,
+			Value: status.status,
+		},
+	})
+	stream.Write(status.text)
+}

streamhandler/stream_handler_test.go

@@ -0,0 +1,227 @@
+package streamhandler
+
+import (
+	"context"
+	"io"
+	"net"
+	"net/http"
+	"net/http/httptest"
+	"strconv"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/sync/errgroup"
+)
+
+const (
+	testOpenStreamTimeout = time.Millisecond * 5000
+	testHandshakeTimeout  = time.Millisecond * 1000
+)
+
+var (
+	testTunnelHostname = h2mux.TunnelHostname("123.cftunnel.com")
+	baseHeaders        = []h2mux.Header{
+		{Name: ":method", Value: "GET"},
+		{Name: ":scheme", Value: "http"},
+		{Name: ":authority", Value: "example.com"},
+		{Name: ":path", Value: "/"},
+	}
+	tunnelHostnameHeader = h2mux.Header{
+		Name:  h2mux.CloudflaredProxyTunnelHostnameHeader,
+		Value: testTunnelHostname.String(),
+	}
+)
+
+func TestServeRequest(t *testing.T) {
+	configChan := make(chan *pogs.ClientConfig)
+	useConfigResultChan := make(chan *pogs.UseConfigurationResult)
+	streamHandler := NewStreamHandler(configChan, useConfigResultChan, logrus.New())
+
+	message := []byte("Hello cloudflared")
+	httpServer := httptest.NewServer(&mockHTTPHandler{message})
+
+	reverseProxyConfigs := []*pogs.ReverseProxyConfig{
+		{
+			TunnelHostname: testTunnelHostname,
+			OriginConfigJSONHandler: &pogs.OriginConfigJSONHandler{
+				OriginConfig: &pogs.HTTPOriginConfig{
+					URLString: httpServer.URL,
+				},
+			},
+		},
+	}
+	streamHandler.UpdateConfig(reverseProxyConfigs)
+
+	muxPair := NewDefaultMuxerPair(t, streamHandler)
+	muxPair.Serve(t)
+
+	ctx, cancel := context.WithTimeout(context.Background(), testOpenStreamTimeout)
+	defer cancel()
+
+	headers := append(baseHeaders, tunnelHostnameHeader)
+	stream, err := muxPair.EdgeMux.OpenStream(ctx, headers, nil)
+	assert.NoError(t, err)
+	assertStatusHeader(t, http.StatusOK, stream.Headers)
+	assertRespBody(t, message, stream)
+}
+
+func TestServeBadRequest(t *testing.T) {
+	configChan := make(chan *pogs.ClientConfig)
+	useConfigResultChan := make(chan *pogs.UseConfigurationResult)
+	streamHandler := NewStreamHandler(configChan, useConfigResultChan, logrus.New())
+
+	muxPair := NewDefaultMuxerPair(t, streamHandler)
+	muxPair.Serve(t)
+
+	ctx, cancel := context.WithTimeout(context.Background(), testOpenStreamTimeout)
+	defer cancel()
+
+	// No tunnel hostname header, expect to get 400 Bad Request
+	stream, err := muxPair.EdgeMux.OpenStream(ctx, baseHeaders, nil)
+	assert.NoError(t, err)
+	assertStatusHeader(t, http.StatusBadRequest, stream.Headers)
+	assertRespBody(t, statusBadRequest.text, stream)
+
+	// No mapping for the tunnel hostname, expect to get 404 Not Found
+	headers := append(baseHeaders, tunnelHostnameHeader)
+	stream, err = muxPair.EdgeMux.OpenStream(ctx, headers, nil)
+	assert.NoError(t, err)
+	assertStatusHeader(t, http.StatusNotFound, stream.Headers)
+	assertRespBody(t, statusNotFound.text, stream)
+
+	// Nothing listening on empty url, so proxy would fail. Expect to get 502 Bad Gateway
+	reverseProxyConfigs := []*pogs.ReverseProxyConfig{
+		{
+			TunnelHostname: testTunnelHostname,
+			OriginConfigJSONHandler: &pogs.OriginConfigJSONHandler{
+				OriginConfig: &pogs.HTTPOriginConfig{
+					URLString: "",
+				},
+			},
+		},
+	}
+	streamHandler.UpdateConfig(reverseProxyConfigs)
+	stream, err = muxPair.EdgeMux.OpenStream(ctx, headers, nil)
+	assert.NoError(t, err)
+	assertStatusHeader(t, http.StatusBadGateway, stream.Headers)
+	assertRespBody(t, statusBadGateway.text, stream)
+
+	// Invalid content-length, wouldn't not be able to create a request. Expect to get 400 Bad Request
+	headers = append(headers, h2mux.Header{
+		Name:  "content-length",
+		Value: "x",
+	})
+	stream, err = muxPair.EdgeMux.OpenStream(ctx, headers, nil)
+	assert.NoError(t, err)
+	assertStatusHeader(t, http.StatusBadRequest, stream.Headers)
+	assertRespBody(t, statusBadRequest.text, stream)
+}
+
+func assertStatusHeader(t *testing.T, expectedStatus int, headers []h2mux.Header) {
+	assert.Equal(t, statusPseudoHeader, headers[0].Name)
+	assert.Equal(t, strconv.Itoa(expectedStatus), headers[0].Value)
+}
+
+func assertRespBody(t *testing.T, expectedRespBody []byte, stream *h2mux.MuxedStream) {
+	respBody := make([]byte, len(expectedRespBody))
+	_, err := stream.Read(respBody)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedRespBody, respBody)
+}
+
+type DefaultMuxerPair struct {
+	OriginMuxConfig h2mux.MuxerConfig
+	OriginMux       *h2mux.Muxer
+	OriginConn      net.Conn
+	EdgeMuxConfig   h2mux.MuxerConfig
+	EdgeMux         *h2mux.Muxer
+	EdgeConn        net.Conn
+	doneC           chan struct{}
+}
+
+func NewDefaultMuxerPair(t assert.TestingT, h h2mux.MuxedStreamHandler) *DefaultMuxerPair {
+	origin, edge := net.Pipe()
+	p := &DefaultMuxerPair{
+		OriginMuxConfig: h2mux.MuxerConfig{
+			Timeout:                 testHandshakeTimeout,
+			Handler:                 h,
+			IsClient:                true,
+			Name:                    "origin",
+			Logger:                  logrus.NewEntry(logrus.New()),
+			DefaultWindowSize:       (1 << 8) - 1,
+			MaxWindowSize:           (1 << 15) - 1,
+			StreamWriteBufferMaxLen: 1024,
+		},
+		OriginConn: origin,
+		EdgeMuxConfig: h2mux.MuxerConfig{
+			Timeout:                 testHandshakeTimeout,
+			IsClient:                false,
+			Name:                    "edge",
+			Logger:                  logrus.NewEntry(logrus.New()),
+			DefaultWindowSize:       (1 << 8) - 1,
+			MaxWindowSize:           (1 << 15) - 1,
+			StreamWriteBufferMaxLen: 1024,
+		},
+		EdgeConn: edge,
+		doneC:    make(chan struct{}),
+	}
+	assert.NoError(t, p.Handshake())
+	return p
+}
+
+func (p *DefaultMuxerPair) Handshake() error {
+	ctx, cancel := context.WithTimeout(context.Background(), testHandshakeTimeout)
+	defer cancel()
+	errGroup, _ := errgroup.WithContext(ctx)
+	errGroup.Go(func() (err error) {
+		p.EdgeMux, err = h2mux.Handshake(p.EdgeConn, p.EdgeConn, p.EdgeMuxConfig)
+		return errors.Wrap(err, "edge handshake failure")
+	})
+	errGroup.Go(func() (err error) {
+		p.OriginMux, err = h2mux.Handshake(p.OriginConn, p.OriginConn, p.OriginMuxConfig)
+		return errors.Wrap(err, "origin handshake failure")
+	})
+
+	return errGroup.Wait()
+}
+
+func (p *DefaultMuxerPair) Serve(t assert.TestingT) {
+	ctx := context.Background()
+	var wg sync.WaitGroup
+	wg.Add(2)
+	go func() {
+		err := p.EdgeMux.Serve(ctx)
+		if err != nil && err != io.EOF && err != io.ErrClosedPipe {
+			t.Errorf("error in edge muxer Serve(): %s", err)
+		}
+		p.OriginMux.Shutdown()
+		wg.Done()
+	}()
+	go func() {
+		err := p.OriginMux.Serve(ctx)
+		if err != nil && err != io.EOF && err != io.ErrClosedPipe {
+			t.Errorf("error in origin muxer Serve(): %s", err)
+		}
+		p.EdgeMux.Shutdown()
+		wg.Done()
+	}()
+	go func() {
+		// notify when both muxes have stopped serving
+		wg.Wait()
+		close(p.doneC)
+	}()
+}
+
+type mockHTTPHandler struct {
+	message []byte
+}
+
+func (mth *mockHTTPHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	w.Write(mth.message)
+}

supervisor/supervisor.go

@@ -0,0 +1,179 @@
+package supervisor
+
+import (
+	"context"
+	"crypto/tls"
+	"fmt"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+
+	"golang.org/x/sync/errgroup"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/updater"
+	"github.com/cloudflare/cloudflared/connection"
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/streamhandler"
+	"github.com/cloudflare/cloudflared/tunnelrpc/pogs"
+	"github.com/sirupsen/logrus"
+)
+
+type Supervisor struct {
+	connManager         *connection.EdgeManager
+	streamHandler       *streamhandler.StreamHandler
+	autoupdater         *updater.AutoUpdater
+	supportAutoupdate   bool
+	newConfigChan       <-chan *pogs.ClientConfig
+	useConfigResultChan chan<- *pogs.UseConfigurationResult
+	state               *state
+	logger              *logrus.Entry
+}
+
+func NewSupervisor(
+	defaultClientConfig *pogs.ClientConfig,
+	userCredential []byte,
+	tlsConfig *tls.Config,
+	serviceDiscoverer connection.EdgeServiceDiscoverer,
+	cloudflaredConfig *connection.CloudflaredConfig,
+	autoupdater *updater.AutoUpdater,
+	supportAutoupdate bool,
+	logger *logrus.Logger,
+) (*Supervisor, error) {
+	newConfigChan := make(chan *pogs.ClientConfig)
+	useConfigResultChan := make(chan *pogs.UseConfigurationResult)
+	streamHandler := streamhandler.NewStreamHandler(newConfigChan, useConfigResultChan, logger)
+	invalidConfigs := streamHandler.UpdateConfig(defaultClientConfig.ReverseProxyConfigs)
+
+	if len(invalidConfigs) > 0 {
+		for _, invalidConfig := range invalidConfigs {
+			logger.Errorf("Tunnel %+v is invalid, reason: %s", invalidConfig.Config, invalidConfig.Reason)
+		}
+		return nil, fmt.Errorf("At least 1 Tunnel config is invalid")
+	}
+
+	tunnelHostnames := make([]h2mux.TunnelHostname, len(defaultClientConfig.ReverseProxyConfigs))
+	for i, reverseProxyConfig := range defaultClientConfig.ReverseProxyConfigs {
+		tunnelHostnames[i] = reverseProxyConfig.TunnelHostname
+	}
+	defaultEdgeMgrConfigurable := &connection.EdgeManagerConfigurable{
+		TunnelHostnames:      tunnelHostnames,
+		EdgeConnectionConfig: defaultClientConfig.EdgeConnectionConfig,
+	}
+	return &Supervisor{
+		connManager: connection.NewEdgeManager(streamHandler, defaultEdgeMgrConfigurable, userCredential, tlsConfig,
+			serviceDiscoverer, cloudflaredConfig, logger),
+		streamHandler:       streamHandler,
+		autoupdater:         autoupdater,
+		supportAutoupdate:   supportAutoupdate,
+		newConfigChan:       newConfigChan,
+		useConfigResultChan: useConfigResultChan,
+		state:               newState(defaultClientConfig),
+		logger:              logger.WithField("subsystem", "supervisor"),
+	}, nil
+}
+
+func (s *Supervisor) Run(ctx context.Context) error {
+	errGroup, groupCtx := errgroup.WithContext(ctx)
+
+	errGroup.Go(func() error {
+		return s.connManager.Run(groupCtx)
+	})
+
+	errGroup.Go(func() error {
+		return s.listenToNewConfig(groupCtx)
+	})
+
+	errGroup.Go(func() error {
+		return s.listenToShutdownSignal(groupCtx)
+	})
+
+	if s.supportAutoupdate {
+		errGroup.Go(func() error {
+			return s.autoupdater.Run(groupCtx)
+		})
+	}
+
+	err := errGroup.Wait()
+	s.logger.Warnf("Supervisor terminated, reason: %v", err)
+	return err
+}
+
+func (s *Supervisor) listenToShutdownSignal(serveCtx context.Context) error {
+	signals := make(chan os.Signal, 10)
+	signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT)
+	defer signal.Stop(signals)
+
+	select {
+	case <-serveCtx.Done():
+		return serveCtx.Err()
+	case sig := <-signals:
+		return fmt.Errorf("received %v signal", sig)
+	}
+}
+
+func (s *Supervisor) listenToNewConfig(ctx context.Context) error {
+	for {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+		case newConfig := <-s.newConfigChan:
+			s.useConfigResultChan <- s.notifySubsystemsNewConfig(newConfig)
+		}
+	}
+}
+
+func (s *Supervisor) notifySubsystemsNewConfig(newConfig *pogs.ClientConfig) *pogs.UseConfigurationResult {
+	s.logger.Infof("Received configuration %v", newConfig.Version)
+	if s.state.hasAppliedVersion(newConfig.Version) {
+		s.logger.Infof("%v has been applied", newConfig.Version)
+		return &pogs.UseConfigurationResult{
+			Success: true,
+		}
+	}
+
+	s.state.updateConfig(newConfig)
+	var tunnelHostnames []h2mux.TunnelHostname
+	for _, tunnelConfig := range newConfig.ReverseProxyConfigs {
+		tunnelHostnames = append(tunnelHostnames, tunnelConfig.TunnelHostname)
+	}
+	// Update connManager configurable
+	s.connManager.UpdateConfigurable(&connection.EdgeManagerConfigurable{
+		TunnelHostnames:      tunnelHostnames,
+		EdgeConnectionConfig: newConfig.EdgeConnectionConfig,
+	})
+	// Update streamHandler tunnelHostnameMapper mapping
+	failedConfigs := s.streamHandler.UpdateConfig(newConfig.ReverseProxyConfigs)
+
+	if s.supportAutoupdate {
+		s.autoupdater.Update(newConfig.SupervisorConfig.AutoUpdateFrequency)
+	}
+
+	return &pogs.UseConfigurationResult{
+		Success:       len(failedConfigs) == 0,
+		FailedConfigs: failedConfigs,
+	}
+}
+
+type state struct {
+	sync.RWMutex
+	currentConfig *pogs.ClientConfig
+}
+
+func newState(currentConfig *pogs.ClientConfig) *state {
+	return &state{
+		currentConfig: currentConfig,
+	}
+}
+
+func (s *state) hasAppliedVersion(incomingVersion pogs.Version) bool {
+	s.RLock()
+	defer s.RUnlock()
+	return s.currentConfig.Version.IsNewerOrEqual(incomingVersion)
+}
+
+func (s *state) updateConfig(newConfig *pogs.ClientConfig) {
+	s.Lock()
+	defer s.Unlock()
+	s.currentConfig = newConfig
+}

tlsconfig/certreloader.go

@@ -2,16 +2,24 @@ package tlsconfig
 
 import (
 	"crypto/tls"
-	"errors"
+	"crypto/x509"
 	"fmt"
+	"io/ioutil"
+	"net"
+	"runtime"
 	"sync"
 
-	tunnellog "github.com/cloudflare/cloudflared/log"
 	"github.com/getsentry/raven-go"
-	log "github.com/sirupsen/logrus"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 	"gopkg.in/urfave/cli.v2"
 )
 
+const (
+	OriginCAPoolFlag = "origin-ca-pool"
+	CaCertFlag       = "cacert"
+)
+
 // CertReloader can load and reload a TLS certificate from a particular filepath.
 // Hooks into tls.Config's GetCertificate to allow a TLS server to update its certificate without restarting.
 type CertReloader struct {
@@ -21,18 +29,14 @@ type CertReloader struct {
 	keyPath     string
 }
 
-// NewCertReloader makes a CertReloader, memorizing the filepaths in the context/flags.
-func NewCertReloader(c *cli.Context, f CLIFlags) (*CertReloader, error) {
-	if !c.IsSet(f.Cert) {
-		return nil, errors.New("CertReloader: cert not provided")
-	}
-	if !c.IsSet(f.Key) {
-		return nil, errors.New("CertReloader: key not provided")
-	}
+// NewCertReloader makes a CertReloader. It loads the cert during initialization to make sure certPath and keyPath are valid
+func NewCertReloader(certPath, keyPath string) (*CertReloader, error) {
 	cr := new(CertReloader)
-	cr.certPath = c.String(f.Cert)
-	cr.keyPath = c.String(f.Key)
-	cr.LoadCert()
+	cr.certPath = certPath
+	cr.keyPath = keyPath
+	if err := cr.LoadCert(); err != nil {
+		return nil, err
+	}
 	return cr, nil
 }
 
@@ -45,18 +49,153 @@ func (cr *CertReloader) Cert(clientHello *tls.ClientHelloInfo) (*tls.Certificate
 
 // LoadCert loads a TLS certificate from the CertReloader's specified filepath.
 // Call this after writing a new certificate to the disk (e.g. after renewing a certificate)
-func (cr *CertReloader) LoadCert() {
+func (cr *CertReloader) LoadCert() error {
 	cr.Lock()
 	defer cr.Unlock()
 
-	log.SetFormatter(&tunnellog.JSONFormatter{})
-	log.Info("Reloading certificate")
 	cert, err := tls.LoadX509KeyPair(cr.certPath, cr.keyPath)
 
 	// Keep the old certificate if there's a problem reading the new one.
 	if err != nil {
 		raven.CaptureError(fmt.Errorf("Error parsing X509 key pair: %v", err), nil)
-		return
+		return err
 	}
 	cr.certificate = &cert
+	return nil
+}
+
+func LoadOriginCA(c *cli.Context, logger *logrus.Logger) (*x509.CertPool, error) {
+	var originCustomCAPool []byte
+
+	originCAPoolFilename := c.String(OriginCAPoolFlag)
+	if originCAPoolFilename != "" {
+		var err error
+		originCustomCAPool, err = ioutil.ReadFile(originCAPoolFilename)
+		if err != nil {
+			return nil, errors.Wrap(err, fmt.Sprintf("unable to read the file %s for --%s", originCAPoolFilename, OriginCAPoolFlag))
+		}
+	}
+
+	originCertPool, err := loadOriginCertPool(originCustomCAPool, logger)
+	if err != nil {
+		return nil, errors.Wrap(err, "error loading the certificate pool")
+	}
+
+	// Windows users should be notified that they can use the flag
+	if runtime.GOOS == "windows" && originCAPoolFilename == "" {
+		logger.Infof("cloudflared does not support loading the system root certificate pool on Windows. Please use the --%s to specify it", OriginCAPoolFlag)
+	}
+
+	return originCertPool, nil
+}
+
+func LoadCustomOriginCA(originCAFilename string) (*x509.CertPool, error) {
+	// First, obtain the system certificate pool
+	certPool, err := x509.SystemCertPool()
+	if err != nil {
+		certPool = x509.NewCertPool()
+	}
+
+	// Next, append the Cloudflare CAs into the system pool
+	cfRootCA, err := GetCloudflareRootCA()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not append Cloudflare Root CAs to cloudflared certificate pool")
+	}
+	for _, cert := range cfRootCA {
+		certPool.AddCert(cert)
+	}
+
+	if originCAFilename == "" {
+		return certPool, nil
+	}
+
+	customOriginCA, err := ioutil.ReadFile(originCAFilename)
+	if err != nil {
+		return nil, errors.Wrap(err, fmt.Sprintf("unable to read the file %s", originCAFilename))
+	}
+
+	if !certPool.AppendCertsFromPEM(customOriginCA) {
+		return nil, fmt.Errorf("error appending custom CA to cert pool")
+	}
+	return certPool, nil
+}
+
+func CreateTunnelConfig(c *cli.Context) (*tls.Config, error) {
+	var rootCAs []string
+	if c.String(CaCertFlag) != "" {
+		rootCAs = append(rootCAs, c.String(CaCertFlag))
+	}
+
+	userConfig := &TLSParameters{RootCAs: rootCAs}
+	tlsConfig, err := GetConfig(userConfig)
+	if err != nil {
+		return nil, err
+	}
+
+	if tlsConfig.RootCAs == nil {
+		rootCAPool := x509.NewCertPool()
+		cfRootCA, err := GetCloudflareRootCA()
+		if err != nil {
+			return nil, errors.Wrap(err, "could not append Cloudflare Root CAs to cloudflared certificate pool")
+		}
+		for _, cert := range cfRootCA {
+			rootCAPool.AddCert(cert)
+		}
+		tlsConfig.RootCAs = rootCAPool
+		tlsConfig.ServerName = "cftunnel.com"
+	} else if edgeAddrs := c.StringSlice("edge"); len(edgeAddrs) > 0 {
+		// Set for development environments and for testing specific origintunneld instances
+		tlsConfig.ServerName, _, _ = net.SplitHostPort(edgeAddrs[0])
+	}
+
+	if tlsConfig.ServerName == "" && !tlsConfig.InsecureSkipVerify {
+		return nil, fmt.Errorf("either ServerName or InsecureSkipVerify must be specified in the tls.Config")
+	}
+	return tlsConfig, nil
+}
+
+func loadOriginCertPool(originCAPoolPEM []byte, logger *logrus.Logger) (*x509.CertPool, error) {
+	// Get the global pool
+	certPool, err := loadGlobalCertPool(logger)
+	if err != nil {
+		return nil, err
+	}
+
+	// Then, add any custom origin CA pool the user may have passed
+	if originCAPoolPEM != nil {
+		if !certPool.AppendCertsFromPEM(originCAPoolPEM) {
+			logger.Warn("could not append the provided origin CA to the cloudflared certificate pool")
+		}
+	}
+
+	return certPool, nil
+}
+
+func loadGlobalCertPool(logger *logrus.Logger) (*x509.CertPool, error) {
+	// First, obtain the system certificate pool
+	certPool, err := x509.SystemCertPool()
+	if err != nil {
+		if runtime.GOOS != "windows" { // See https://github.com/golang/go/issues/16736
+			logger.WithError(err).Warn("error obtaining the system certificates")
+		}
+		certPool = x509.NewCertPool()
+	}
+
+	// Next, append the Cloudflare CAs into the system pool
+	cfRootCA, err := GetCloudflareRootCA()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not append Cloudflare Root CAs to cloudflared certificate pool")
+	}
+	for _, cert := range cfRootCA {
+		certPool.AddCert(cert)
+	}
+
+	// Finally, add the Hello certificate into the pool (since it's self-signed)
+	helloCert, err := GetHelloCertificateX509()
+	if err != nil {
+		return nil, errors.Wrap(err, "could not append Hello server certificate to cloudflared certificate pool")
+	}
+	certPool.AddCert(helloCert)
+
+	return certPool, nil
 }

tlsconfig/cloudflare_ca.go

@@ -2,6 +2,7 @@ package tlsconfig
 
 import (
 	"crypto/x509"
+	"encoding/pem"
 )
 
 // TODO: remove the Origin CA root certs when migrated to Authenticated Origin Pull certs
@@ -85,11 +86,26 @@ QzMmZpRpIBB321ZBlcnlxiTJvWxvbCPHKHj20VwwAz7LONF59s84ZsOqfoBv8gKM
 s0s5dsq5zpLeaw==
 -----END CERTIFICATE-----`)
 
-func GetCloudflareRootCA() *x509.CertPool {
-	ca := x509.NewCertPool()
-	if !ca.AppendCertsFromPEM([]byte(cloudflareRootCA)) {
-		// should never happen
-		panic("failure loading Cloudflare origin CA pem")
+func GetCloudflareRootCA() ([]*x509.Certificate, error) {
+	var certs []*x509.Certificate
+	pemBlocks := cloudflareRootCA
+	for len(pemBlocks) > 0 {
+		var block *pem.Block
+		block, pemBlocks = pem.Decode(pemBlocks)
+		if block == nil {
+			break
+		}
+		if block.Type != "CERTIFICATE" {
+			continue
+		}
+
+		cert, err := x509.ParseCertificate(block.Bytes)
+		if err != nil {
+			return nil, err
+		}
+
+		certs = append(certs, cert)
 	}
-	return ca
+
+	return certs, nil
 }

tlsconfig/testcert.pem

@@ -0,0 +1,13 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

tlsconfig/testcert2.pem

@@ -0,0 +1,13 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

tlsconfig/testkey.pem

@@ -0,0 +1,10 @@
+-----BEGIN PRIVATE KEY-----
+MIIBVQIBADANBgkqhkiG9w0BAQEFAASCAT8wggE7AgEAAkEA5A2lNGfnAt/xJIjn
+HaSkO9t0PLuV+FqYnYSfhD7DLVxIqnxufz+jKFUXtBOyKYMZMjjjmlX2cN80k9gH
+chbTHQIDAQABAkAoeDtu91lJa1AxuZG58vOqI6GW/Xr5naojmdts7m5YaAhDa7DE
+zJUp4d8SP5cGBf1/PB3x6Cu9UviFNQ16wmzJAiEA8gUm4UYpWZD4Ze2l/xb+BK8D
+IglSUIy1VxW+X1G55wMCIQDxOfXiFzPqnv/e5avKGv6CU11Dhmbi1OpiyybZTjGz
+XwIhAM3bE/cJdqJ4bNBGE6umIupY8pFA3IMnLBempwbsvPOBAiEAgzJ+5OSxu92W
+VGidsmJUIhWtF9i1hJFAmVLcYjwBFAkCICtjP/vv0qOZWk4mAAn2zz9UVWp45DSR
+p/FA8V77ohXD
+-----END PRIVATE KEY-----

tlsconfig/tlsconfig.go

@@ -6,150 +6,86 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"io/ioutil"
-	"net"
 
-	"github.com/cloudflare/cloudflared/log"
 	"github.com/pkg/errors"
-	"gopkg.in/urfave/cli.v2"
-	"runtime"
 )
 
-var logger = log.CreateLogger()
-
-// CLIFlags names the flags used to configure TLS for a command or subsystem.
-// The nil value for a field means the flag is ignored.
-type CLIFlags struct {
-	Cert       string
-	Key        string
-	ClientCert string
-	RootCA     string
+// Config is the user provided parameters to create a tls.Config
+type TLSParameters struct {
+	Cert             string
+	Key              string
+	GetCertificate   *CertReloader
+	ClientCAs        []string
+	RootCAs          []string
+	ServerName       string
+	CurvePreferences []tls.CurveID
 }
 
-// GetConfig returns a TLS configuration according to the flags defined in f and
-// set by the user.
-func (f CLIFlags) GetConfig(c *cli.Context) *tls.Config {
-	config := &tls.Config{}
-
-	if c.IsSet(f.Cert) && c.IsSet(f.Key) {
-		cert, err := tls.LoadX509KeyPair(c.String(f.Cert), c.String(f.Key))
+// GetConfig returns a TLS configuration according to the Config set by the user.
+func GetConfig(p *TLSParameters) (*tls.Config, error) {
+	tlsconfig := &tls.Config{}
+	if p.Cert != "" && p.Key != "" {
+		cert, err := tls.LoadX509KeyPair(p.Cert, p.Key)
 		if err != nil {
-			logger.WithError(err).Fatal("Error parsing X509 key pair")
+			return nil, errors.Wrap(err, "Error parsing X509 key pair")
 		}
-		config.Certificates = []tls.Certificate{cert}
-		config.BuildNameToCertificate()
+		tlsconfig.Certificates = []tls.Certificate{cert}
+		// BuildNameToCertificate parses Certificates and builds NameToCertificate from common name
+		// and SAN fields of leaf certificates
+		tlsconfig.BuildNameToCertificate()
 	}
-	return f.finishGettingConfig(c, config)
-}
 
-func (f CLIFlags) GetConfigReloadableCert(c *cli.Context, cr *CertReloader) *tls.Config {
-	config := &tls.Config{
-		GetCertificate: cr.Cert,
+	if p.GetCertificate != nil {
+		// GetCertificate is called when client supplies SNI info or Certificates is empty.
+		// Order of retrieving certificate is GetCertificate, NameToCertificate and lastly first element of Certificates
+		tlsconfig.GetCertificate = p.GetCertificate.Cert
 	}
-	config.BuildNameToCertificate()
-	return f.finishGettingConfig(c, config)
-}
 
-func (f CLIFlags) finishGettingConfig(c *cli.Context, config *tls.Config) *tls.Config {
-	if c.IsSet(f.ClientCert) {
+	if len(p.ClientCAs) > 0 {
 		// set of root certificate authorities that servers use if required to verify a client certificate
 		// by the policy in ClientAuth
-		config.ClientCAs = LoadCert(c.String(f.ClientCert))
+		clientCAs, err := LoadCert(p.ClientCAs)
+		if err != nil {
+			return nil, errors.Wrap(err, "Error loading client CAs")
+		}
+		tlsconfig.ClientCAs = clientCAs
 		// server's policy for TLS Client Authentication. Default is no client cert
-		config.ClientAuth = tls.RequireAndVerifyClientCert
+		tlsconfig.ClientAuth = tls.RequireAndVerifyClientCert
 	}
-	// set of root certificate authorities that clients use when verifying server certificates
-	if c.IsSet(f.RootCA) {
-		config.RootCAs = LoadCert(c.String(f.RootCA))
+
+	if len(p.RootCAs) > 0 {
+		rootCAs, err := LoadCert(p.RootCAs)
+		if err != nil {
+			return nil, errors.Wrap(err, "Error loading root CAs")
+		}
+		tlsconfig.RootCAs = rootCAs
 	}
-	// we optimize CurveP256
-	config.CurvePreferences = []tls.CurveID{tls.CurveP256}
-	return config
+
+	if p.ServerName != "" {
+		tlsconfig.ServerName = p.ServerName
+	}
+
+	if len(p.CurvePreferences) > 0 {
+		tlsconfig.CurvePreferences = p.CurvePreferences
+	} else {
+		// Cloudflare optimize CurveP256
+		tlsconfig.CurvePreferences = []tls.CurveID{tls.CurveP256}
+	}
+
+	return tlsconfig, nil
 }
 
 // LoadCert creates a CertPool containing all certificates in a PEM-format file.
-func LoadCert(certPath string) *x509.CertPool {
-	caCert, err := ioutil.ReadFile(certPath)
-	if err != nil {
-		logger.WithError(err).Fatalf("Error reading certificate %s", certPath)
-	}
+func LoadCert(certPaths []string) (*x509.CertPool, error) {
 	ca := x509.NewCertPool()
-	if !ca.AppendCertsFromPEM(caCert) {
-		logger.WithError(err).Fatalf("Error parsing certificate %s", certPath)
-	}
-	return ca
-}
-
-func LoadGlobalCertPool() (*x509.CertPool, error) {
-	success := false
-
-	// First, obtain the system certificate pool
-	certPool, systemCertPoolErr := x509.SystemCertPool()
-	if systemCertPoolErr != nil {
-		if runtime.GOOS != "windows" {
-			logger.Warnf("error obtaining the system certificates: %s", systemCertPoolErr)
+	for _, certPath := range certPaths {
+		caCert, err := ioutil.ReadFile(certPath)
+		if err != nil {
+			return nil, errors.Wrapf(err, "Error reading certificate %s", certPath)
 		}
-		certPool = x509.NewCertPool()
-	} else {
-		success = true
-	}
-
-	// Next, append the Cloudflare CA pool into the system pool
-	if !certPool.AppendCertsFromPEM(cloudflareRootCA) {
-		logger.Warn("could not append the CF certificate to the cloudflared certificate pool")
-	} else {
-		success = true
-	}
-
-	if success != true { // Obtaining any of the CAs has failed; this is a fatal error
-		return nil, errors.New("error loading any of the CAs into the global certificate pool")
-	}
-
-	// Finally, add the Hello certificate into the pool (since it's self-signed)
-	helloCertificate, err := GetHelloCertificateX509()
-	if err != nil {
-		logger.Warn("error obtaining the Hello server certificate")
-	}
-
-	certPool.AddCert(helloCertificate)
-
-	return certPool, nil
-}
-
-func LoadOriginCertPool(originCAPoolPEM []byte) (*x509.CertPool, error) {
-	success := false
-
-	// Get the global pool
-	certPool, globalPoolErr := LoadGlobalCertPool()
-	if globalPoolErr != nil {
-		certPool = x509.NewCertPool()
-	} else {
-		success = true
-	}
-
-	// Then, add any custom origin CA pool the user may have passed
-	if originCAPoolPEM != nil {
-		if !certPool.AppendCertsFromPEM(originCAPoolPEM) {
-			logger.Warn("could not append the provided origin CA to the cloudflared certificate pool")
-		} else {
-			success = true
+		if !ca.AppendCertsFromPEM(caCert) {
+			return nil, errors.Wrapf(err, "Error parsing certificate %s", certPath)
 		}
 	}
-
-	if success != true {
-		return nil, errors.New("error loading any of the CAs into the origin certificate pool")
-	}
-
-	return certPool, nil
-}
-
-func CreateTunnelConfig(c *cli.Context, addrs []string) *tls.Config {
-	tlsConfig := CLIFlags{RootCA: "cacert"}.GetConfig(c)
-	if tlsConfig.RootCAs == nil {
-		tlsConfig.RootCAs = GetCloudflareRootCA()
-		tlsConfig.ServerName = "cftunnel.com"
-	} else if len(addrs) > 0 {
-		// Set for development environments and for testing specific origintunneld instances
-		tlsConfig.ServerName, _, _ = net.SplitHostPort(addrs[0])
-	}
-	return tlsConfig
+	return ca, nil
 }

tlsconfig/tlsconfig_test.go

@@ -1,214 +1,84 @@
-// +build ignore
 // TODO: Remove the above build tag and include this test when we start compiling with Golang 1.10.0+
 
 package tlsconfig
 
 import (
-	"crypto/x509"
-	"crypto/x509/pkix"
-	"encoding/asn1"
-	"os"
+	"crypto/tls"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
 )
 
-// Generated using `openssl req -newkey rsa:512 -nodes -x509 -days 3650`
-var samplePEM = []byte(`
------BEGIN CERTIFICATE-----
-MIIB4DCCAYoCCQCb/H0EUrdXEjANBgkqhkiG9w0BAQsFADB3MQswCQYDVQQGEwJV
-UzEOMAwGA1UECAwFVGV4YXMxDzANBgNVBAcMBkF1c3RpbjEZMBcGA1UECgwQQ2xv
-dWRmbGFyZSwgSW5jLjEZMBcGA1UECwwQUHJvZHVjdCBTdHJhdGVneTERMA8GA1UE
-AwwIVGVzdCBPbmUwHhcNMTgwNDI2MTYxMDUxWhcNMjgwNDIzMTYxMDUxWjB3MQsw
-CQYDVQQGEwJVUzEOMAwGA1UECAwFVGV4YXMxDzANBgNVBAcMBkF1c3RpbjEZMBcG
-A1UECgwQQ2xvdWRmbGFyZSwgSW5jLjEZMBcGA1UECwwQUHJvZHVjdCBTdHJhdGVn
-eTERMA8GA1UEAwwIVGVzdCBPbmUwXDANBgkqhkiG9w0BAQEFAANLADBIAkEAwVQD
-K0SJ25UFLznm2pU3zhzMEvpDEofHVNnCjk4mlDrtVop7PkKZ8pDEmuQANltUrxC8
-yHBE2wXMv+GlH+bDtwIDAQABMA0GCSqGSIb3DQEBCwUAA0EAjVYQzozIFPkt/HRY
-uUoZ8zEHIDICb0syFf5VAjm9AgTwIPzUmD+c5vl6LWDnxq7L45nLCzhhQ6YmiwDz
-X7Wcyg==
------END CERTIFICATE-----
------BEGIN CERTIFICATE-----
-MIIB4DCCAYoCCQDZfCdAJ+mwzDANBgkqhkiG9w0BAQsFADB3MQswCQYDVQQGEwJV
-UzEOMAwGA1UECAwFVGV4YXMxDzANBgNVBAcMBkF1c3RpbjEZMBcGA1UECgwQQ2xv
-dWRmbGFyZSwgSW5jLjEZMBcGA1UECwwQUHJvZHVjdCBTdHJhdGVneTERMA8GA1UE
-AwwIVGVzdCBUd28wHhcNMTgwNDI2MTYxMTIwWhcNMjgwNDIzMTYxMTIwWjB3MQsw
-CQYDVQQGEwJVUzEOMAwGA1UECAwFVGV4YXMxDzANBgNVBAcMBkF1c3RpbjEZMBcG
-A1UECgwQQ2xvdWRmbGFyZSwgSW5jLjEZMBcGA1UECwwQUHJvZHVjdCBTdHJhdGVn
-eTERMA8GA1UEAwwIVGVzdCBUd28wXDANBgkqhkiG9w0BAQEFAANLADBIAkEAoHKp
-ROVK3zCSsH7ocYeyRAML4V7SFAbZcb4WIwDnE08oMBVRkQVcW5tqEkvG3RiClfzV
-wZIJ3CfqKIeSNSDU9wIDAQABMA0GCSqGSIb3DQEBCwUAA0EAJw2gUbnPiq4C2p5b
-iWzlA9Q7aKo+VQ4H7IZS7tTccr59nVjvH/TG3eWujpnocr4TOqW9M3CK1DF9mUGP
-3pQ3Jg==
------END CERTIFICATE-----
-`)
+// testcert.pem and testcert2.pem are Generated using `openssl req -newkey rsa:512 -nodes -x509 -days 3650`
+const (
+	testcertCommonName = "localhost"
+)
 
-var systemCertPoolSubjects []*pkix.Name
+func TestGetFromEmptyConfig(t *testing.T) {
+	c := &TLSParameters{}
 
-type certificateFixture struct {
-	ou string
-	cn string
+	tlsConfig, err := GetConfig(c)
+	assert.NoError(t, err)
+	assert.Empty(t, tlsConfig.Certificates)
+
+	assert.Empty(t, tlsConfig.NameToCertificate)
+
+	assert.Nil(t, tlsConfig.ClientCAs)
+	assert.Equal(t, tls.NoClientCert, tlsConfig.ClientAuth)
+
+	assert.Nil(t, tlsConfig.RootCAs)
+
+	assert.Len(t, tlsConfig.CurvePreferences, 1)
+	assert.Equal(t, tls.CurveP256, tlsConfig.CurvePreferences[0])
 }
 
-func TestMain(m *testing.M) {
-	systemCertPool, err := x509.SystemCertPool()
-	if isUnrecoverableError(err) {
-		os.Exit(1)
-	}
+func TestGetConfig(t *testing.T) {
+	cert, err := tls.LoadX509KeyPair("testcert.pem", "testkey.pem")
+	assert.NoError(t, err)
 
-	if systemCertPool == nil {
-		// On Windows, let's just assume the system cert pool was empty
-		systemCertPool = x509.NewCertPool()
+	c := &TLSParameters{
+		Cert:             "testcert.pem",
+		Key:              "testkey.pem",
+		ClientCAs:        []string{"testcert.pem", "testcert2.pem"},
+		RootCAs:          []string{"testcert.pem", "testcert2.pem"},
+		ServerName:       "test",
+		CurvePreferences: []tls.CurveID{tls.CurveP384},
 	}
+	tlsConfig, err := GetConfig(c)
+	assert.NoError(t, err)
+	assert.Len(t, tlsConfig.Certificates, 1)
+	assert.Equal(t, cert, tlsConfig.Certificates[0])
 
-	systemCertPoolSubjects, err = getCertPoolSubjects(systemCertPool)
-	if err != nil {
-		os.Exit(1)
-	}
+	assert.Equal(t, cert, *tlsConfig.NameToCertificate[testcertCommonName])
 
-	os.Exit(m.Run())
+	assert.NotNil(t, tlsConfig.ClientCAs)
+	assert.Equal(t, tls.RequireAndVerifyClientCert, tlsConfig.ClientAuth)
+
+	assert.NotNil(t, tlsConfig.RootCAs)
+
+	assert.Len(t, tlsConfig.CurvePreferences, 1)
+	assert.Equal(t, tls.CurveP384, tlsConfig.CurvePreferences[0])
 }
 
-func TestLoadOriginCertPoolJustSystemPool(t *testing.T) {
-	certPoolSubjects := loadCertPoolSubjects(t, nil)
-	extraSubjects := subjectSubtract(systemCertPoolSubjects, certPoolSubjects)
+func TestCertReloader(t *testing.T) {
+	expectedCert, err := tls.LoadX509KeyPair("testcert.pem", "testkey.pem")
+	assert.NoError(t, err)
 
-	// Remove extra subjects from the cert pool
-	var filteredSystemCertPoolSubjects []*pkix.Name
+	certReloader, err := NewCertReloader("testcert.pem", "testkey.pem")
+	assert.NoError(t, err)
 
-	t.Log(extraSubjects)
+	chi := &tls.ClientHelloInfo{ServerName: testcertCommonName}
+	cert, err := certReloader.Cert(chi)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedCert, *cert)
 
-OUTER:
-	for _, subject := range certPoolSubjects {
-		for _, extraSubject := range extraSubjects {
-			if subject == extraSubject {
-				t.Log(extraSubject)
-				continue OUTER
-			}
-		}
-
-		filteredSystemCertPoolSubjects = append(filteredSystemCertPoolSubjects, subject)
+	c := &TLSParameters{
+		GetCertificate: certReloader,
 	}
+	tlsConfig, err := GetConfig(c)
+	assert.NoError(t, err)
 
-	assert.Equal(t, len(filteredSystemCertPoolSubjects), len(systemCertPoolSubjects))
-
-	difference := subjectSubtract(systemCertPoolSubjects, filteredSystemCertPoolSubjects)
-	assert.Equal(t, 0, len(difference))
-}
-
-func TestLoadOriginCertPoolCFCertificates(t *testing.T) {
-	certPoolSubjects := loadCertPoolSubjects(t, nil)
-
-	extraSubjects := subjectSubtract(systemCertPoolSubjects, certPoolSubjects)
-
-	expected := []*certificateFixture{
-		{ou: "CloudFlare Origin SSL ECC Certificate Authority"},
-		{ou: "CloudFlare Origin SSL Certificate Authority"},
-		{cn: "origin-pull.cloudflare.net"},
-		{cn: "Argo Tunnel Sample Hello Server Certificate"},
-	}
-
-	assertFixturesMatchSubjects(t, expected, extraSubjects)
-}
-
-func TestLoadOriginCertPoolWithExtraPEMs(t *testing.T) {
-	certPoolWithoutPEMSubjects := loadCertPoolSubjects(t, nil)
-	certPoolWithPEMSubjects := loadCertPoolSubjects(t, samplePEM)
-
-	difference := subjectSubtract(certPoolWithoutPEMSubjects, certPoolWithPEMSubjects)
-
-	assert.Equal(t, 2, len(difference))
-
-	expected := []*certificateFixture{
-		{cn: "Test One"},
-		{cn: "Test Two"},
-	}
-
-	assertFixturesMatchSubjects(t, expected, difference)
-}
-
-func loadCertPoolSubjects(t *testing.T, originCAPoolPEM []byte) []*pkix.Name {
-	certPool, err := LoadOriginCertPool(originCAPoolPEM)
-	if isUnrecoverableError(err) {
-		t.Fatal(err)
-	}
-	assert.NotEmpty(t, certPool.Subjects())
-	certPoolSubjects, err := getCertPoolSubjects(certPool)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	return certPoolSubjects
-}
-
-func assertFixturesMatchSubjects(t *testing.T, fixtures []*certificateFixture, subjects []*pkix.Name) {
-	assert.Equal(t, len(fixtures), len(subjects))
-
-	for _, fixture := range fixtures {
-		found := false
-		for _, subject := range subjects {
-			found = found || fixtureMatchesSubjectPredicate(fixture, subject)
-		}
-
-		if !found {
-			t.Fail()
-		}
-	}
-}
-
-func fixtureMatchesSubjectPredicate(fixture *certificateFixture, subject *pkix.Name) bool {
-	cnMatch := true
-	if fixture.cn != "" {
-		cnMatch = fixture.cn == subject.CommonName
-	}
-
-	ouMatch := true
-	if fixture.ou != "" {
-		ouMatch = len(subject.OrganizationalUnit) > 0 && fixture.ou == subject.OrganizationalUnit[0]
-	}
-
-	return cnMatch && ouMatch
-}
-
-func subjectSubtract(left []*pkix.Name, right []*pkix.Name) []*pkix.Name {
-	var difference []*pkix.Name
-
-	var found bool
-	for _, r := range right {
-		found = false
-		for _, l := range left {
-			if (*l).String() == (*r).String() {
-				found = true
-			}
-		}
-
-		if !found {
-			difference = append(difference, r)
-		}
-	}
-
-	return difference
-}
-
-func getCertPoolSubjects(certPool *x509.CertPool) ([]*pkix.Name, error) {
-	var subjects []*pkix.Name
-
-	for _, subject := range certPool.Subjects() {
-		var sequence pkix.RDNSequence
-		_, err := asn1.Unmarshal(subject, &sequence)
-		if err != nil {
-			return nil, err
-		}
-
-		name := pkix.Name{}
-		name.FillFromRDNSequence(&sequence)
-
-		subjects = append(subjects, &name)
-	}
-
-	return subjects, nil
-}
-
-func isUnrecoverableError(err error) bool {
-	return err != nil && err.Error() != "crypto/x509: system root pool is not available on Windows"
+	cert, err = tlsConfig.GetCertificate(chi)
+	assert.NoError(t, err)
+	assert.Equal(t, expectedCert, *cert)
 }

tunneldns/https_proxy.go

@@ -1,10 +1,11 @@
 package tunneldns
 
 import (
+	"context"
+
 	"github.com/coredns/coredns/plugin"
 	"github.com/miekg/dns"
 	"github.com/pkg/errors"
-	"golang.org/x/net/context"
 )
 
 // Upstream is a simplified interface for proxy destination

tunneldns/https_upstream.go

@@ -2,6 +2,7 @@ package tunneldns
 
 import (
 	"bytes"
+	"context"
 	"crypto/tls"
 	"fmt"
 	"io/ioutil"
@@ -12,7 +13,6 @@ import (
 	"github.com/miekg/dns"
 	"github.com/pkg/errors"
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/net/context"
 	"golang.org/x/net/http2"
 )
 
@@ -39,6 +39,7 @@ func NewUpstreamHTTPS(endpoint string) (Upstream, error) {
 		TLSClientConfig:    tls,
 		DisableCompression: true,
 		MaxIdleConns:       1,
+		Proxy:              http.ProxyFromEnvironment,
 	}
 	http2.ConfigureTransport(transport)
 
@@ -81,7 +82,7 @@ func (u *UpstreamHTTPS) exchangeWireformat(msg []byte) ([]byte, error) {
 		return nil, errors.Wrap(err, "failed to create an HTTPS request")
 	}
 
-	req.Header.Add("Content-Type", "application/dns-udpwireformat")
+	req.Header.Add("Content-Type", "application/dns-message")
 	req.Host = u.endpoint.Hostname()
 
 	resp, err := u.client.Do(req)

tunneldns/metrics.go

@@ -1,6 +1,8 @@
 package tunneldns
 
 import (
+	"context"
+
 	"github.com/coredns/coredns/plugin"
 	"github.com/coredns/coredns/plugin/metrics/vars"
 	"github.com/coredns/coredns/plugin/pkg/dnstest"
@@ -8,7 +10,6 @@ import (
 	"github.com/coredns/coredns/request"
 	"github.com/miekg/dns"
 	"github.com/prometheus/client_golang/prometheus"
-	"golang.org/x/net/context"
 )
 
 // MetricsPlugin is an adapter for CoreDNS and built-in metrics

tunnelhostnamemapper/tunnelhostnamemapper.go

@@ -0,0 +1,49 @@
+package tunnelhostnamemapper
+
+import (
+	"sync"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/originservice"
+)
+
+// TunnelHostnameMapper maps TunnelHostname to an OriginService
+type TunnelHostnameMapper struct {
+	sync.RWMutex
+	tunnelHostnameToOrigin map[h2mux.TunnelHostname]originservice.OriginService
+}
+
+func NewTunnelHostnameMapper() *TunnelHostnameMapper {
+	return &TunnelHostnameMapper{
+		tunnelHostnameToOrigin: make(map[h2mux.TunnelHostname]originservice.OriginService),
+	}
+}
+
+// Get an OriginService given a TunnelHostname
+func (om *TunnelHostnameMapper) Get(key h2mux.TunnelHostname) (originservice.OriginService, bool) {
+	om.RLock()
+	defer om.RUnlock()
+	originService, ok := om.tunnelHostnameToOrigin[key]
+	return originService, ok
+}
+
+// Add a mapping. If there is already an OriginService with this key, shutdown the old origin service and replace it
+// with the new one
+func (om *TunnelHostnameMapper) Add(key h2mux.TunnelHostname, os originservice.OriginService) {
+	om.Lock()
+	defer om.Unlock()
+	if oldOS, ok := om.tunnelHostnameToOrigin[key]; ok {
+		oldOS.Shutdown()
+	}
+	om.tunnelHostnameToOrigin[key] = os
+}
+
+// DeleteAll mappings, and shutdown all OriginService
+func (om *TunnelHostnameMapper) DeleteAll() {
+	om.Lock()
+	defer om.Unlock()
+	for key, os := range om.tunnelHostnameToOrigin {
+		os.Shutdown()
+		delete(om.tunnelHostnameToOrigin, key)
+	}
+}

tunnelhostnamemapper/tunnelhostnamemapper_test.go

@@ -0,0 +1,74 @@
+package tunnelhostnamemapper
+
+import (
+	"fmt"
+	"net/http"
+	"net/url"
+	"sync"
+	"testing"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/originservice"
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	routines = 1000
+)
+
+func TestTunnelHostnameMapperConcurrentAccess(t *testing.T) {
+	thm := NewTunnelHostnameMapper()
+
+	concurrentOps(t, func(i int) {
+		// om is empty
+		os, ok := thm.Get(tunnelHostname(i))
+		assert.False(t, ok)
+		assert.Nil(t, os)
+	})
+
+	firstURL, err := url.Parse("https://127.0.0.1:8080")
+	assert.NoError(t, err)
+	httpOS := originservice.NewHTTPService(http.DefaultTransport, firstURL, false)
+	concurrentOps(t, func(i int) {
+		thm.Add(tunnelHostname(i), httpOS)
+	})
+
+	concurrentOps(t, func(i int) {
+		os, ok := thm.Get(tunnelHostname(i))
+		assert.True(t, ok)
+		assert.Equal(t, httpOS, os)
+	})
+
+	secondURL, err := url.Parse("https://127.0.0.1:8080")
+	assert.NoError(t, err)
+	secondHTTPOS := originservice.NewHTTPService(http.DefaultTransport, secondURL, true)
+	concurrentOps(t, func(i int) {
+		// Add should httpOS with secondHTTPOS
+		thm.Add(tunnelHostname(i), secondHTTPOS)
+	})
+
+	concurrentOps(t, func(i int) {
+		os, ok := thm.Get(tunnelHostname(i))
+		assert.True(t, ok)
+		assert.Equal(t, secondHTTPOS, os)
+	})
+
+	thm.DeleteAll()
+	assert.Empty(t, thm.tunnelHostnameToOrigin)
+}
+
+func concurrentOps(t *testing.T, f func(i int)) {
+	var wg sync.WaitGroup
+	wg.Add(routines)
+	for i := 0; i < routines; i++ {
+		go func(i int) {
+			f(i)
+			wg.Done()
+		}(i)
+	}
+	wg.Wait()
+}
+
+func tunnelHostname(i int) h2mux.TunnelHostname {
+	return h2mux.TunnelHostname(fmt.Sprintf("%d.cftunnel.com", i))
+}

tunnelrpc/log.go

@@ -1,8 +1,9 @@
 package tunnelrpc
 
 import (
+	"context"
+
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/net/context"
 	"golang.org/x/net/trace"
 	"zombiezen.com/go/capnproto2/rpc"
 )

tunnelrpc/logtransport.go

@@ -3,9 +3,9 @@ package tunnelrpc
 
 import (
 	"bytes"
+	"context"
 
 	log "github.com/sirupsen/logrus"
-	"golang.org/x/net/context"
 	"zombiezen.com/go/capnproto2/encoding/text"
 	"zombiezen.com/go/capnproto2/rpc"
 	rpccapnp "zombiezen.com/go/capnproto2/std/capnp/rpc"

tunnelrpc/pogs/config.go

@@ -0,0 +1,799 @@
+package pogs
+
+import (
+	"context"
+	"crypto/tls"
+	"crypto/x509"
+	"encoding/json"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/cloudflare/cloudflared/h2mux"
+	"github.com/cloudflare/cloudflared/originservice"
+	"github.com/cloudflare/cloudflared/tlsconfig"
+	"github.com/cloudflare/cloudflared/tunnelrpc"
+
+	"github.com/pkg/errors"
+	capnp "zombiezen.com/go/capnproto2"
+	"zombiezen.com/go/capnproto2/pogs"
+	"zombiezen.com/go/capnproto2/rpc"
+	"zombiezen.com/go/capnproto2/server"
+)
+
+///
+/// Structs
+///
+
+// ClientConfig is a collection of FallibleConfig that determines how cloudflared should function
+type ClientConfig struct {
+	Version              Version               `json:"version"`
+	SupervisorConfig     *SupervisorConfig     `json:"supervisor_config"`
+	EdgeConnectionConfig *EdgeConnectionConfig `json:"edge_connection_config"`
+	DoHProxyConfigs      []*DoHProxyConfig     `json:"doh_proxy_configs"`
+	ReverseProxyConfigs  []*ReverseProxyConfig `json:"reverse_proxy_configs"`
+}
+
+// Version type models the version of a ClientConfig
+type Version uint64
+
+func InitVersion() Version {
+	return Version(0)
+}
+
+func (v Version) IsNewerOrEqual(comparedVersion Version) bool {
+	return v >= comparedVersion
+}
+
+func (v Version) String() string {
+	return fmt.Sprintf("Version: %d", v)
+}
+
+// FallibleConfig is an interface implemented by configs that cloudflared might not be able to apply
+type FallibleConfig interface {
+	FailReason(err error) string
+	jsonType() string
+}
+
+// SupervisorConfig specifies config of components managed by Supervisor other than ConnectionManager
+type SupervisorConfig struct {
+	AutoUpdateFrequency    time.Duration `json:"auto_update_frequency"`
+	MetricsUpdateFrequency time.Duration `json:"metrics_update_frequency"`
+	GracePeriod            time.Duration `json:"grace_period"`
+}
+
+// FailReason impelents FallibleConfig interface for SupervisorConfig
+func (sc *SupervisorConfig) FailReason(err error) string {
+	return fmt.Sprintf("Cannot apply SupervisorConfig, err: %v", err)
+}
+
+func (sc *SupervisorConfig) MarshalJSON() ([]byte, error) {
+	marshaler := make(map[string]SupervisorConfig, 1)
+	marshaler[sc.jsonType()] = *sc
+	return json.Marshal(marshaler)
+}
+
+func (sc *SupervisorConfig) jsonType() string {
+	return "supervisor_config"
+}
+
+// EdgeConnectionConfig specifies what parameters and how may connections should ConnectionManager establish with edge
+type EdgeConnectionConfig struct {
+	NumHAConnections    uint8         `json:"num_ha_connections"`
+	HeartbeatInterval   time.Duration `json:"heartbeat_interval"`
+	Timeout             time.Duration `json:"timeout"`
+	MaxFailedHeartbeats uint64        `json:"max_failed_heartbeats"`
+	UserCredentialPath  string        `json:"user_credential_path"`
+}
+
+// FailReason impelents FallibleConfig interface for EdgeConnectionConfig
+func (cmc *EdgeConnectionConfig) FailReason(err error) string {
+	return fmt.Sprintf("Cannot apply EdgeConnectionConfig, err: %v", err)
+}
+
+func (cmc *EdgeConnectionConfig) MarshalJSON() ([]byte, error) {
+	marshaler := make(map[string]EdgeConnectionConfig, 1)
+	marshaler[cmc.jsonType()] = *cmc
+	return json.Marshal(marshaler)
+}
+
+func (cmc *EdgeConnectionConfig) jsonType() string {
+	return "edge_connection_config"
+}
+
+// DoHProxyConfig is configuration for DNS over HTTPS service
+type DoHProxyConfig struct {
+	ListenHost string   `json:"listen_host"`
+	ListenPort uint16   `json:"listen_port"`
+	Upstreams  []string `json:"upstreams"`
+}
+
+// FailReason impelents FallibleConfig interface for DoHProxyConfig
+func (dpc *DoHProxyConfig) FailReason(err error) string {
+	return fmt.Sprintf("Cannot apply DoHProxyConfig, err: %v", err)
+}
+
+func (dpc *DoHProxyConfig) MarshalJSON() ([]byte, error) {
+	marshaler := make(map[string]DoHProxyConfig, 1)
+	marshaler[dpc.jsonType()] = *dpc
+	return json.Marshal(marshaler)
+}
+
+func (dpc *DoHProxyConfig) jsonType() string {
+	return "doh_proxy_config"
+}
+
+// ReverseProxyConfig how and for what hostnames can this cloudflared proxy
+type ReverseProxyConfig struct {
+	TunnelHostname          h2mux.TunnelHostname     `json:"tunnel_hostname"`
+	OriginConfigJSONHandler *OriginConfigJSONHandler `json:"origin_config"`
+	Retries                 uint64                   `json:"retries"`
+	ConnectionTimeout       time.Duration            `json:"connection_timeout"`
+	CompressionQuality      uint64                   `json:"compression_quality"`
+}
+
+func NewReverseProxyConfig(
+	tunnelHostname string,
+	originConfig OriginConfig,
+	retries uint64,
+	connectionTimeout time.Duration,
+	compressionQuality uint64,
+) (*ReverseProxyConfig, error) {
+	if originConfig == nil {
+		return nil, fmt.Errorf("NewReverseProxyConfig: originConfigUnmarshaler was null")
+	}
+	return &ReverseProxyConfig{
+		TunnelHostname:          h2mux.TunnelHostname(tunnelHostname),
+		OriginConfigJSONHandler: &OriginConfigJSONHandler{originConfig},
+		Retries:                 retries,
+		ConnectionTimeout:       connectionTimeout,
+		CompressionQuality:      compressionQuality,
+	}, nil
+}
+
+// FailReason impelents FallibleConfig interface for ReverseProxyConfig
+func (rpc *ReverseProxyConfig) FailReason(err error) string {
+	return fmt.Sprintf("Cannot apply ReverseProxyConfig, err: %v", err)
+}
+
+func (rpc *ReverseProxyConfig) MarshalJSON() ([]byte, error) {
+	marshaler := make(map[string]ReverseProxyConfig, 1)
+	marshaler[rpc.jsonType()] = *rpc
+	return json.Marshal(marshaler)
+}
+
+func (rpc *ReverseProxyConfig) jsonType() string {
+	return "reverse_proxy_config"
+}
+
+//go-sumtype:decl OriginConfig
+type OriginConfig interface {
+	// Service returns a OriginService used to proxy to the origin
+	Service() (originservice.OriginService, error)
+	// go-sumtype requires at least one unexported method, otherwise it will complain that interface is not sealed
+	jsonType() string
+}
+
+type originType int
+
+const (
+	httpType originType = iota
+	wsType
+	helloWorldType
+)
+
+func (ot originType) String() string {
+	switch ot {
+	case httpType:
+		return "Http"
+	case wsType:
+		return "WebSocket"
+	case helloWorldType:
+		return "HelloWorld"
+	default:
+		return "unknown"
+	}
+}
+
+type HTTPOriginConfig struct {
+	URLString              string        `capnp:"urlString" json:"url_string" mapstructure:"url_string"`
+	TCPKeepAlive           time.Duration `capnp:"tcpKeepAlive" json:"tcp_keep_alive" mapstructure:"tcp_keep_alive"`
+	DialDualStack          bool          `json:"dial_dual_stack" mapstructure:"dial_dual_stack"`
+	TLSHandshakeTimeout    time.Duration `capnp:"tlsHandshakeTimeout" json:"tls_handshake_timeout" mapstructure:"tls_handshake_timeout"`
+	TLSVerify              bool          `capnp:"tlsVerify" json:"tls_verify" mapstructure:"tls_verify"`
+	OriginCAPool           string        `json:"origin_ca_pool" mapstructure:"origin_ca_pool"`
+	OriginServerName       string        `json:"origin_server_name" mapstructure:"origin_server_name"`
+	MaxIdleConnections     uint64        `json:"max_idle_connections" mapstructure:"max_idle_connections"`
+	IdleConnectionTimeout  time.Duration `json:"idle_connection_timeout" mapstructure:"idle_connection_timeout"`
+	ProxyConnectionTimeout time.Duration `json:"proxy_connection_timeout" mapstructure:"proxy_connection_timeout"`
+	ExpectContinueTimeout  time.Duration `json:"expect_continue_timeout" mapstructure:"expect_continue_timeout"`
+	ChunkedEncoding        bool          `json:"chunked_encoding" mapstructure:"chunked_encoding"`
+}
+
+func (hc *HTTPOriginConfig) Service() (originservice.OriginService, error) {
+	rootCAs, err := tlsconfig.LoadCustomOriginCA(hc.OriginCAPool)
+	if err != nil {
+		return nil, err
+	}
+
+	dialContext := (&net.Dialer{
+		Timeout:   hc.ProxyConnectionTimeout,
+		KeepAlive: hc.TCPKeepAlive,
+		DualStack: hc.DialDualStack,
+	}).DialContext
+	transport := &http.Transport{
+		Proxy:       http.ProxyFromEnvironment,
+		DialContext: dialContext,
+		TLSClientConfig: &tls.Config{
+			RootCAs:            rootCAs,
+			ServerName:         hc.OriginServerName,
+			InsecureSkipVerify: hc.TLSVerify,
+		},
+		TLSHandshakeTimeout:   hc.TLSHandshakeTimeout,
+		MaxIdleConns:          int(hc.MaxIdleConnections),
+		IdleConnTimeout:       hc.IdleConnectionTimeout,
+		ExpectContinueTimeout: hc.ExpectContinueTimeout,
+	}
+	url, err := url.Parse(hc.URLString)
+	if err != nil {
+		return nil, errors.Wrapf(err, "%s is not a valid URL", hc.URLString)
+	}
+	if url.Scheme == "unix" {
+		transport.DialContext = func(ctx context.Context, _, _ string) (net.Conn, error) {
+			return dialContext(ctx, "unix", url.Host)
+		}
+	}
+	return originservice.NewHTTPService(transport, url, hc.ChunkedEncoding), nil
+}
+
+func (_ *HTTPOriginConfig) jsonType() string {
+	return httpType.String()
+}
+
+type WebSocketOriginConfig struct {
+	URLString        string `capnp:"urlString" json:"url_string" mapstructure:"url_string"`
+	TLSVerify        bool   `capnp:"tlsVerify" json:"tls_verify" mapstructure:"tls_verify"`
+	OriginCAPool     string `json:"origin_ca_pool" mapstructure:"origin_ca_pool"`
+	OriginServerName string `json:"origin_server_name" mapstructure:"origin_server_name"`
+}
+
+func (wsc *WebSocketOriginConfig) Service() (originservice.OriginService, error) {
+	rootCAs, err := tlsconfig.LoadCustomOriginCA(wsc.OriginCAPool)
+	if err != nil {
+		return nil, err
+	}
+	tlsConfig := &tls.Config{
+		RootCAs:            rootCAs,
+		ServerName:         wsc.OriginServerName,
+		InsecureSkipVerify: wsc.TLSVerify,
+	}
+
+	url, err := url.Parse(wsc.URLString)
+	if err != nil {
+		return nil, errors.Wrapf(err, "%s is not a valid URL", wsc.URLString)
+	}
+	return originservice.NewWebSocketService(tlsConfig, url)
+}
+
+func (_ *WebSocketOriginConfig) jsonType() string {
+	return wsType.String()
+}
+
+type HelloWorldOriginConfig struct{}
+
+func (_ *HelloWorldOriginConfig) Service() (originservice.OriginService, error) {
+	helloCert, err := tlsconfig.GetHelloCertificateX509()
+	if err != nil {
+		return nil, errors.Wrap(err, "Cannot get Hello World server certificate")
+	}
+	rootCAs := x509.NewCertPool()
+	rootCAs.AddCert(helloCert)
+	transport := &http.Transport{
+		Proxy: http.ProxyFromEnvironment,
+		DialContext: (&net.Dialer{
+			Timeout:   30 * time.Second,
+			KeepAlive: 30 * time.Second,
+			DualStack: true,
+		}).DialContext,
+		TLSClientConfig: &tls.Config{
+			RootCAs: rootCAs,
+		},
+		MaxIdleConns:          100,
+		IdleConnTimeout:       90 * time.Second,
+		TLSHandshakeTimeout:   10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+	}
+	return originservice.NewHelloWorldService(transport)
+}
+
+func (_ *HelloWorldOriginConfig) jsonType() string {
+	return helloWorldType.String()
+}
+
+/*
+ * Boilerplate to convert between these structs and the primitive structs
+ * generated by capnp-go.
+ * Mnemonics for variable names in this section:
+ *   - `p` is for POGS (plain old Go struct)
+ *   - `s` (and `ss`) is for "capnp.Struct", which is the fundamental type
+ *     underlying the capnp-go data structures.
+ */
+
+func MarshalClientConfig(s tunnelrpc.ClientConfig, p *ClientConfig) error {
+	s.SetVersion(uint64(p.Version))
+
+	supervisorConfig, err := s.NewSupervisorConfig()
+	if err != nil {
+		return errors.Wrap(err, "failed to get SupervisorConfig")
+	}
+	if err = MarshalSupervisorConfig(supervisorConfig, p.SupervisorConfig); err != nil {
+		return errors.Wrap(err, "MarshalSupervisorConfig error")
+	}
+
+	edgeConnectionConfig, err := s.NewEdgeConnectionConfig()
+	if err != nil {
+		return errors.Wrap(err, "failed to get EdgeConnectionConfig")
+	}
+	if err := MarshalEdgeConnectionConfig(edgeConnectionConfig, p.EdgeConnectionConfig); err != nil {
+		return errors.Wrap(err, "MarshalEdgeConnectionConfig error")
+	}
+
+	if err := marshalDoHProxyConfigs(s, p.DoHProxyConfigs); err != nil {
+		return errors.Wrap(err, "marshalDoHProxyConfigs error")
+	}
+	if err := marshalReverseProxyConfigs(s, p.ReverseProxyConfigs); err != nil {
+		return errors.Wrap(err, "marshalReverseProxyConfigs error")
+	}
+	return nil
+}
+
+func MarshalSupervisorConfig(s tunnelrpc.SupervisorConfig, p *SupervisorConfig) error {
+	if err := pogs.Insert(tunnelrpc.SupervisorConfig_TypeID, s.Struct, p); err != nil {
+		return errors.Wrap(err, "failed to insert SupervisorConfig")
+	}
+	return nil
+}
+
+func MarshalEdgeConnectionConfig(s tunnelrpc.EdgeConnectionConfig, p *EdgeConnectionConfig) error {
+	if err := pogs.Insert(tunnelrpc.EdgeConnectionConfig_TypeID, s.Struct, p); err != nil {
+		return errors.Wrap(err, "failed to insert EdgeConnectionConfig")
+	}
+	return nil
+}
+
+func marshalDoHProxyConfigs(s tunnelrpc.ClientConfig, dohProxyConfigs []*DoHProxyConfig) error {
+	capnpList, err := s.NewDohProxyConfigs(int32(len(dohProxyConfigs)))
+	if err != nil {
+		return err
+	}
+	for i, unmarshalledConfig := range dohProxyConfigs {
+		err := MarshalDoHProxyConfig(capnpList.At(i), unmarshalledConfig)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func marshalReverseProxyConfigs(s tunnelrpc.ClientConfig, reverseProxyConfigs []*ReverseProxyConfig) error {
+	capnpList, err := s.NewReverseProxyConfigs(int32(len(reverseProxyConfigs)))
+	if err != nil {
+		return err
+	}
+	for i, unmarshalledConfig := range reverseProxyConfigs {
+		err := MarshalReverseProxyConfig(capnpList.At(i), unmarshalledConfig)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func UnmarshalClientConfig(s tunnelrpc.ClientConfig) (*ClientConfig, error) {
+	p := new(ClientConfig)
+	p.Version = Version(s.Version())
+
+	supervisorConfig, err := s.SupervisorConfig()
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get SupervisorConfig")
+	}
+	p.SupervisorConfig, err = UnmarshalSupervisorConfig(supervisorConfig)
+	if err != nil {
+		return nil, errors.Wrap(err, "UnmarshalSupervisorConfig error")
+	}
+
+	edgeConnectionConfig, err := s.EdgeConnectionConfig()
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to get ConnectionManagerConfig")
+	}
+	p.EdgeConnectionConfig, err = UnmarshalEdgeConnectionConfig(edgeConnectionConfig)
+	if err != nil {
+		return nil, errors.Wrap(err, "UnmarshalConnectionManagerConfig error")
+	}
+
+	p.DoHProxyConfigs, err = unmarshalDoHProxyConfigs(s)
+	if err != nil {
+		return nil, errors.Wrap(err, "unmarshalDoHProxyConfigs error")
+	}
+
+	p.ReverseProxyConfigs, err = unmarshalReverseProxyConfigs(s)
+	if err != nil {
+		return nil, errors.Wrap(err, "unmarshalReverseProxyConfigs error")
+	}
+
+	return p, nil
+}
+
+func UnmarshalSupervisorConfig(s tunnelrpc.SupervisorConfig) (*SupervisorConfig, error) {
+	p := new(SupervisorConfig)
+	err := pogs.Extract(p, tunnelrpc.SupervisorConfig_TypeID, s.Struct)
+	return p, err
+}
+
+func UnmarshalEdgeConnectionConfig(s tunnelrpc.EdgeConnectionConfig) (*EdgeConnectionConfig, error) {
+	p := new(EdgeConnectionConfig)
+	err := pogs.Extract(p, tunnelrpc.EdgeConnectionConfig_TypeID, s.Struct)
+	return p, err
+}
+
+func unmarshalDoHProxyConfigs(s tunnelrpc.ClientConfig) ([]*DoHProxyConfig, error) {
+	var result []*DoHProxyConfig
+	marshalledDoHProxyConfigs, err := s.DohProxyConfigs()
+	if err != nil {
+		return nil, err
+	}
+	for i := 0; i < marshalledDoHProxyConfigs.Len(); i++ {
+		ss := marshalledDoHProxyConfigs.At(i)
+		dohProxyConfig, err := UnmarshalDoHProxyConfig(ss)
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, dohProxyConfig)
+	}
+	return result, nil
+}
+
+func unmarshalReverseProxyConfigs(s tunnelrpc.ClientConfig) ([]*ReverseProxyConfig, error) {
+	var result []*ReverseProxyConfig
+	marshalledReverseProxyConfigs, err := s.ReverseProxyConfigs()
+	if err != nil {
+		return nil, err
+	}
+	for i := 0; i < marshalledReverseProxyConfigs.Len(); i++ {
+		ss := marshalledReverseProxyConfigs.At(i)
+		reverseProxyConfig, err := UnmarshalReverseProxyConfig(ss)
+		if err != nil {
+			return nil, err
+		}
+		result = append(result, reverseProxyConfig)
+	}
+	return result, nil
+}
+
+func MarshalUseConfigurationResult(s tunnelrpc.UseConfigurationResult, p *UseConfigurationResult) error {
+	capnpList, err := s.NewFailedConfigs(int32(len(p.FailedConfigs)))
+	if err != nil {
+		return errors.Wrap(err, "Cannot create new FailedConfigs")
+	}
+	for i, unmarshalledFailedConfig := range p.FailedConfigs {
+		err := MarshalFailedConfig(capnpList.At(i), unmarshalledFailedConfig)
+		if err != nil {
+			return errors.Wrapf(err, "Cannot MarshalFailedConfig at index %d", i)
+		}
+	}
+	s.SetSuccess(p.Success)
+	return nil
+}
+
+func UnmarshalUseConfigurationResult(s tunnelrpc.UseConfigurationResult) (*UseConfigurationResult, error) {
+	p := new(UseConfigurationResult)
+	var failedConfigs []*FailedConfig
+	marshalledFailedConfigs, err := s.FailedConfigs()
+	if err != nil {
+		return nil, errors.Wrap(err, "Cannot get FailedConfigs")
+	}
+	for i := 0; i < marshalledFailedConfigs.Len(); i++ {
+		ss := marshalledFailedConfigs.At(i)
+		failedConfig, err := UnmarshalFailedConfig(ss)
+		if err != nil {
+			return nil, errors.Wrapf(err, "Cannot UnmarshalFailedConfig at index %d", i)
+		}
+		failedConfigs = append(failedConfigs, failedConfig)
+	}
+	p.FailedConfigs = failedConfigs
+	p.Success = s.Success()
+	return p, nil
+}
+
+func MarshalDoHProxyConfig(s tunnelrpc.DoHProxyConfig, p *DoHProxyConfig) error {
+	return pogs.Insert(tunnelrpc.DoHProxyConfig_TypeID, s.Struct, p)
+}
+
+func UnmarshalDoHProxyConfig(s tunnelrpc.DoHProxyConfig) (*DoHProxyConfig, error) {
+	p := new(DoHProxyConfig)
+	err := pogs.Extract(p, tunnelrpc.DoHProxyConfig_TypeID, s.Struct)
+	return p, err
+}
+
+func MarshalReverseProxyConfig(s tunnelrpc.ReverseProxyConfig, p *ReverseProxyConfig) error {
+	s.SetTunnelHostname(p.TunnelHostname.String())
+	switch config := p.OriginConfigJSONHandler.OriginConfig.(type) {
+	case *HTTPOriginConfig:
+		ss, err := s.Origin().NewHttp()
+		if err != nil {
+			return err
+		}
+		if err := MarshalHTTPOriginConfig(ss, config); err != nil {
+			return err
+		}
+	case *WebSocketOriginConfig:
+		ss, err := s.Origin().NewWebsocket()
+		if err != nil {
+			return err
+		}
+		if err := MarshalWebSocketOriginConfig(ss, config); err != nil {
+			return err
+		}
+	case *HelloWorldOriginConfig:
+		ss, err := s.Origin().NewHelloWorld()
+		if err != nil {
+			return err
+		}
+		if err := MarshalHelloWorldOriginConfig(ss, config); err != nil {
+			return err
+		}
+	default:
+		return fmt.Errorf("Unknown type for config: %T", config)
+	}
+	s.SetRetries(p.Retries)
+	s.SetConnectionTimeout(p.ConnectionTimeout.Nanoseconds())
+	s.SetCompressionQuality(p.CompressionQuality)
+	return nil
+}
+
+func UnmarshalReverseProxyConfig(s tunnelrpc.ReverseProxyConfig) (*ReverseProxyConfig, error) {
+	p := new(ReverseProxyConfig)
+	tunnelHostname, err := s.TunnelHostname()
+	if err != nil {
+		return nil, err
+	}
+	p.TunnelHostname = h2mux.TunnelHostname(tunnelHostname)
+	switch s.Origin().Which() {
+	case tunnelrpc.ReverseProxyConfig_origin_Which_http:
+		ss, err := s.Origin().Http()
+		if err != nil {
+			return nil, err
+		}
+		config, err := UnmarshalHTTPOriginConfig(ss)
+		if err != nil {
+			return nil, err
+		}
+		p.OriginConfigJSONHandler = &OriginConfigJSONHandler{config}
+	case tunnelrpc.ReverseProxyConfig_origin_Which_websocket:
+		ss, err := s.Origin().Websocket()
+		if err != nil {
+			return nil, err
+		}
+		config, err := UnmarshalWebSocketOriginConfig(ss)
+		if err != nil {
+			return nil, err
+		}
+		p.OriginConfigJSONHandler = &OriginConfigJSONHandler{config}
+	case tunnelrpc.ReverseProxyConfig_origin_Which_helloWorld:
+		ss, err := s.Origin().HelloWorld()
+		if err != nil {
+			return nil, err
+		}
+		config, err := UnmarshalHelloWorldOriginConfig(ss)
+		if err != nil {
+			return nil, err
+		}
+		p.OriginConfigJSONHandler = &OriginConfigJSONHandler{config}
+	}
+	p.Retries = s.Retries()
+	p.ConnectionTimeout = time.Duration(s.ConnectionTimeout())
+	p.CompressionQuality = s.CompressionQuality()
+	return p, nil
+}
+
+func MarshalHTTPOriginConfig(s tunnelrpc.HTTPOriginConfig, p *HTTPOriginConfig) error {
+	return pogs.Insert(tunnelrpc.HTTPOriginConfig_TypeID, s.Struct, p)
+}
+
+func UnmarshalHTTPOriginConfig(s tunnelrpc.HTTPOriginConfig) (*HTTPOriginConfig, error) {
+	p := new(HTTPOriginConfig)
+	err := pogs.Extract(p, tunnelrpc.HTTPOriginConfig_TypeID, s.Struct)
+	return p, err
+}
+
+func MarshalWebSocketOriginConfig(s tunnelrpc.WebSocketOriginConfig, p *WebSocketOriginConfig) error {
+	return pogs.Insert(tunnelrpc.WebSocketOriginConfig_TypeID, s.Struct, p)
+}
+
+func UnmarshalWebSocketOriginConfig(s tunnelrpc.WebSocketOriginConfig) (*WebSocketOriginConfig, error) {
+	p := new(WebSocketOriginConfig)
+	err := pogs.Extract(p, tunnelrpc.WebSocketOriginConfig_TypeID, s.Struct)
+	return p, err
+}
+
+func MarshalHelloWorldOriginConfig(s tunnelrpc.HelloWorldOriginConfig, p *HelloWorldOriginConfig) error {
+	return pogs.Insert(tunnelrpc.HelloWorldOriginConfig_TypeID, s.Struct, p)
+}
+
+func UnmarshalHelloWorldOriginConfig(s tunnelrpc.HelloWorldOriginConfig) (*HelloWorldOriginConfig, error) {
+	p := new(HelloWorldOriginConfig)
+	err := pogs.Extract(p, tunnelrpc.HelloWorldOriginConfig_TypeID, s.Struct)
+	return p, err
+}
+
+type ClientService interface {
+	UseConfiguration(ctx context.Context, config *ClientConfig) (*UseConfigurationResult, error)
+}
+
+type ClientService_PogsClient struct {
+	Client capnp.Client
+	Conn   *rpc.Conn
+}
+
+func (c *ClientService_PogsClient) Close() error {
+	return c.Conn.Close()
+}
+
+func (c *ClientService_PogsClient) UseConfiguration(
+	ctx context.Context,
+	config *ClientConfig,
+) (*UseConfigurationResult, error) {
+	client := tunnelrpc.ClientService{Client: c.Client}
+	promise := client.UseConfiguration(ctx, func(p tunnelrpc.ClientService_useConfiguration_Params) error {
+		clientServiceConfig, err := p.NewClientServiceConfig()
+		if err != nil {
+			return err
+		}
+		return MarshalClientConfig(clientServiceConfig, config)
+	})
+	retval, err := promise.Result().Struct()
+	if err != nil {
+		return nil, err
+	}
+	return UnmarshalUseConfigurationResult(retval)
+}
+
+func ClientService_ServerToClient(s ClientService) tunnelrpc.ClientService {
+	return tunnelrpc.ClientService_ServerToClient(ClientService_PogsImpl{s})
+}
+
+type ClientService_PogsImpl struct {
+	impl ClientService
+}
+
+func (i ClientService_PogsImpl) UseConfiguration(p tunnelrpc.ClientService_useConfiguration) error {
+	config, err := p.Params.ClientServiceConfig()
+	if err != nil {
+		return errors.Wrap(err, "Cannot get CloudflaredConfig parameter")
+	}
+	pogsConfig, err := UnmarshalClientConfig(config)
+	if err != nil {
+		return errors.Wrap(err, "Cannot unmarshal tunnelrpc.CloudflaredConfig to *CloudflaredConfig")
+	}
+	server.Ack(p.Options)
+	userConfigResult, err := i.impl.UseConfiguration(p.Ctx, pogsConfig)
+	if err != nil {
+		return err
+	}
+	result, err := p.Results.NewResult()
+	if err != nil {
+		return err
+	}
+	return MarshalUseConfigurationResult(result, userConfigResult)
+}
+
+type UseConfigurationResult struct {
+	Success       bool            `json:"success"`
+	FailedConfigs []*FailedConfig `json:"failed_configs"`
+}
+
+type FailedConfig struct {
+	Config FallibleConfig `json:"config"`
+	Reason string         `json:"reason"`
+}
+
+func MarshalFailedConfig(s tunnelrpc.FailedConfig, p *FailedConfig) error {
+	switch config := p.Config.(type) {
+	case *SupervisorConfig:
+		ss, err := s.Config().NewSupervisor()
+		if err != nil {
+			return err
+		}
+		err = MarshalSupervisorConfig(ss, config)
+		if err != nil {
+			return err
+		}
+	case *EdgeConnectionConfig:
+		ss, err := s.Config().NewEdgeConnection()
+		if err != nil {
+			return err
+		}
+		err = MarshalEdgeConnectionConfig(ss, config)
+		if err != nil {
+			return err
+		}
+	case *DoHProxyConfig:
+		ss, err := s.Config().NewDoh()
+		if err != nil {
+			return err
+		}
+		err = MarshalDoHProxyConfig(ss, config)
+		if err != nil {
+			return err
+		}
+	case *ReverseProxyConfig:
+		ss, err := s.Config().NewReverseProxy()
+		if err != nil {
+			return err
+		}
+		err = MarshalReverseProxyConfig(ss, config)
+		if err != nil {
+			return err
+		}
+	default:
+		return fmt.Errorf("Unknown type for Config: %T", config)
+	}
+	s.SetReason(p.Reason)
+	return nil
+}
+
+func UnmarshalFailedConfig(s tunnelrpc.FailedConfig) (*FailedConfig, error) {
+	p := new(FailedConfig)
+	switch s.Config().Which() {
+	case tunnelrpc.FailedConfig_config_Which_supervisor:
+		ss, err := s.Config().Supervisor()
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot get SupervisorConfig from Config")
+		}
+		config, err := UnmarshalSupervisorConfig(ss)
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot UnmarshalSupervisorConfig")
+		}
+		p.Config = config
+	case tunnelrpc.FailedConfig_config_Which_edgeConnection:
+		ss, err := s.Config().EdgeConnection()
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot get ConnectionManager from Config")
+		}
+		config, err := UnmarshalEdgeConnectionConfig(ss)
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot UnmarshalConnectionManagerConfig")
+		}
+		p.Config = config
+	case tunnelrpc.FailedConfig_config_Which_doh:
+		ss, err := s.Config().Doh()
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot get Doh from Config")
+		}
+		config, err := UnmarshalDoHProxyConfig(ss)
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot UnmarshalDoHProxyConfig")
+		}
+		p.Config = config
+	case tunnelrpc.FailedConfig_config_Which_reverseProxy:
+		ss, err := s.Config().ReverseProxy()
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot get ReverseProxy from Config")
+		}
+		config, err := UnmarshalReverseProxyConfig(ss)
+		if err != nil {
+			return nil, errors.Wrap(err, "Cannot UnmarshalReverseProxyConfig")
+		}
+		p.Config = config
+	default:
+		return nil, fmt.Errorf("Unknown type for FailedConfig: %v", s.Config().Which())
+	}
+	reason, err := s.Reason()
+	if err != nil {
+		return nil, errors.Wrap(err, "Cannot get Reason")
+	}
+	p.Reason = reason
+	return p, nil
+}

tunnelrpc/pogs/config_test.go

@@ -0,0 +1,435 @@
+package pogs
+
+import (
+	"fmt"
+	"reflect"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/cloudflare/cloudflared/tunnelrpc"
+	capnp "zombiezen.com/go/capnproto2"
+)
+
+// Assert *HTTPOriginConfig implements OriginConfig
+var _ OriginConfig = (*HTTPOriginConfig)(nil)
+
+// Assert *WebSocketOriginConfig implements OriginConfig
+var _ OriginConfig = (*WebSocketOriginConfig)(nil)
+
+// Assert *HelloWorldOriginConfig implements OriginConfig
+var _ OriginConfig = (*HelloWorldOriginConfig)(nil)
+
+func TestVersion(t *testing.T) {
+	firstVersion := InitVersion()
+	secondVersion := Version(1)
+	assert.False(t, firstVersion.IsNewerOrEqual(secondVersion))
+	assert.True(t, secondVersion.IsNewerOrEqual(firstVersion))
+	assert.True(t, secondVersion.IsNewerOrEqual(secondVersion))
+}
+
+func TestClientConfig(t *testing.T) {
+	addDoHProxyConfigs := func(c *ClientConfig) {
+		c.DoHProxyConfigs = []*DoHProxyConfig{
+			sampleDoHProxyConfig(),
+		}
+	}
+	addReverseProxyConfigs := func(c *ClientConfig) {
+		c.ReverseProxyConfigs = []*ReverseProxyConfig{
+			sampleReverseProxyConfig(),
+			sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+			}),
+			sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+				c.OriginConfigJSONHandler = &OriginConfigJSONHandler{sampleHTTPOriginConfig()}
+			}),
+			sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+				c.OriginConfigJSONHandler = &OriginConfigJSONHandler{sampleHTTPOriginConfigUnixPath()}
+			}),
+			sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+				c.OriginConfigJSONHandler = &OriginConfigJSONHandler{sampleWebSocketOriginConfig()}
+			}),
+		}
+	}
+
+	testCases := []*ClientConfig{
+		sampleClientConfig(),
+		sampleClientConfig(addDoHProxyConfigs),
+		sampleClientConfig(addReverseProxyConfigs),
+		sampleClientConfig(addDoHProxyConfigs, addReverseProxyConfigs),
+	}
+	for i, testCase := range testCases {
+		_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
+		capnpEntity, err := tunnelrpc.NewClientConfig(seg)
+		if !assert.NoError(t, err) {
+			t.Fatal("Couldn't initialize a new message")
+		}
+		err = MarshalClientConfig(capnpEntity, testCase)
+		if !assert.NoError(t, err, "testCase index %v failed to marshal", i) {
+			continue
+		}
+		result, err := UnmarshalClientConfig(capnpEntity)
+		if !assert.NoError(t, err, "testCase index %v failed to unmarshal", i) {
+			continue
+		}
+		assert.Equal(t, testCase, result, "testCase index %v didn't preserve struct through marshalling and unmarshalling", i)
+	}
+}
+
+func TestUseConfigurationResult(t *testing.T) {
+	testCases := []*UseConfigurationResult{
+		&UseConfigurationResult{
+			Success: true,
+		},
+		&UseConfigurationResult{
+			Success: false,
+			FailedConfigs: []*FailedConfig{
+				{
+					Config: sampleReverseProxyConfig(),
+					Reason: "Invalid certificate",
+				},
+				{
+					Config: sampleDoHProxyConfig(),
+					Reason: "Cannot listen on port 53",
+				},
+			},
+		},
+	}
+	for i, testCase := range testCases {
+		_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
+		capnpEntity, err := tunnelrpc.NewUseConfigurationResult(seg)
+		if !assert.NoError(t, err) {
+			t.Fatal("Couldn't initialize a new message")
+		}
+		err = MarshalUseConfigurationResult(capnpEntity, testCase)
+		if !assert.NoError(t, err, "testCase index %v failed to marshal", i) {
+			continue
+		}
+		result, err := UnmarshalUseConfigurationResult(capnpEntity)
+		if !assert.NoError(t, err, "testCase index %v failed to unmarshal", i) {
+			continue
+		}
+		assert.Equal(t, testCase, result, "testCase index %v didn't preserve struct through marshalling and unmarshalling", i)
+	}
+}
+
+func TestDoHProxyConfig(t *testing.T) {
+	testCases := []*DoHProxyConfig{
+		sampleDoHProxyConfig(),
+		sampleDoHProxyConfig(func(c *DoHProxyConfig) {
+			c.Upstreams = nil
+		}),
+	}
+	for i, testCase := range testCases {
+		_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
+		capnpEntity, err := tunnelrpc.NewDoHProxyConfig(seg)
+		if !assert.NoError(t, err) {
+			t.Fatal("Couldn't initialize a new message")
+		}
+		err = MarshalDoHProxyConfig(capnpEntity, testCase)
+		if !assert.NoError(t, err, "testCase index %v failed to marshal", i) {
+			continue
+		}
+		result, err := UnmarshalDoHProxyConfig(capnpEntity)
+		if !assert.NoError(t, err, "testCase index %v failed to unmarshal", i) {
+			continue
+		}
+		assert.Equal(t, testCase, result, "testCase index %v didn't preserve struct through marshalling and unmarshalling", i)
+	}
+}
+
+func TestReverseProxyConfig(t *testing.T) {
+	testCases := []*ReverseProxyConfig{
+		sampleReverseProxyConfig(),
+		sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+			c.OriginConfigJSONHandler = &OriginConfigJSONHandler{sampleHTTPOriginConfig()}
+		}),
+		sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+			c.OriginConfigJSONHandler = &OriginConfigJSONHandler{sampleHTTPOriginConfigUnixPath()}
+		}),
+		sampleReverseProxyConfig(func(c *ReverseProxyConfig) {
+			c.OriginConfigJSONHandler = &OriginConfigJSONHandler{sampleWebSocketOriginConfig()}
+		}),
+	}
+	for i, testCase := range testCases {
+		_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
+		capnpEntity, err := tunnelrpc.NewReverseProxyConfig(seg)
+		if !assert.NoError(t, err) {
+			t.Fatal("Couldn't initialize a new message")
+		}
+		err = MarshalReverseProxyConfig(capnpEntity, testCase)
+		if !assert.NoError(t, err, "testCase index %v failed to marshal", i) {
+			continue
+		}
+		result, err := UnmarshalReverseProxyConfig(capnpEntity)
+		if !assert.NoError(t, err, "testCase index %v failed to unmarshal", i) {
+			continue
+		}
+		assert.Equal(t, testCase, result, "testCase index %v didn't preserve struct through marshalling and unmarshalling", i)
+	}
+}
+
+func TestHTTPOriginConfig(t *testing.T) {
+	testCases := []*HTTPOriginConfig{
+		sampleHTTPOriginConfig(),
+	}
+	for i, testCase := range testCases {
+		_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
+		capnpEntity, err := tunnelrpc.NewHTTPOriginConfig(seg)
+		if !assert.NoError(t, err) {
+			t.Fatal("Couldn't initialize a new message")
+		}
+		err = MarshalHTTPOriginConfig(capnpEntity, testCase)
+		if !assert.NoError(t, err, "testCase index %v failed to marshal", i) {
+			continue
+		}
+		result, err := UnmarshalHTTPOriginConfig(capnpEntity)
+		if !assert.NoError(t, err, "testCase index %v failed to unmarshal", i) {
+			continue
+		}
+		assert.Equal(t, testCase, result, "testCase index %v didn't preserve struct through marshalling and unmarshalling", i)
+	}
+}
+
+func TestWebSocketOriginConfig(t *testing.T) {
+	testCases := []*WebSocketOriginConfig{
+		sampleWebSocketOriginConfig(),
+	}
+	for i, testCase := range testCases {
+		_, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
+		capnpEntity, err := tunnelrpc.NewWebSocketOriginConfig(seg)
+		if !assert.NoError(t, err) {
+			t.Fatal("Couldn't initialize a new message")
+		}
+		err = MarshalWebSocketOriginConfig(capnpEntity, testCase)
+		if !assert.NoError(t, err, "testCase index %v failed to marshal", i) {
+			continue
+		}
+		result, err := UnmarshalWebSocketOriginConfig(capnpEntity)
+		if !assert.NoError(t, err, "testCase index %v failed to unmarshal", i) {
+			continue
+		}
+		assert.Equal(t, testCase, result, "testCase index %v didn't preserve struct through marshalling and unmarshalling", i)
+	}
+}
+
+func TestOriginConfigInvalidURL(t *testing.T) {
+	invalidConfigs := []OriginConfig{
+		&HTTPOriginConfig{
+			// this url doesn't have a scheme
+			URLString: "127.0.0.1:36192",
+		},
+		&WebSocketOriginConfig{
+			URLString: "127.0.0.1:36192",
+		},
+	}
+
+	for _, config := range invalidConfigs {
+		service, err := config.Service()
+		assert.Error(t, err)
+		assert.Nil(t, service)
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////////
+// Functions to generate sample data for ease of testing
+//
+// There's one "sample" function per struct type. Each goes like this:
+//   1. Initialize an instance of the relevant struct.
+//   2. Ensure the instance has no zero-valued fields. (This catches the
+//      error-case where a field was added, but we forgot to add code to
+//      marshal/unmarshal this field in CapnProto.)
+//   3. Apply one or more "override" functions (which accept a
+//      pointer-to-struct, so they can mutate the instance).
+
+// sampleClientConfig initializes a new ClientConfig literal,
+// applies any number of overrides to it, and returns it.
+func sampleClientConfig(overrides ...func(*ClientConfig)) *ClientConfig {
+	sample := &ClientConfig{
+		Version:              Version(1337),
+		SupervisorConfig:     sampleSupervisorConfig(),
+		EdgeConnectionConfig: sampleEdgeConnectionConfig(),
+	}
+	sample.ensureNoZeroFields()
+	for _, f := range overrides {
+		f(sample)
+	}
+	return sample
+}
+
+func sampleSupervisorConfig() *SupervisorConfig {
+	sample := &SupervisorConfig{
+		AutoUpdateFrequency:    21 * time.Hour,
+		MetricsUpdateFrequency: 11 * time.Minute,
+		GracePeriod:            31 * time.Second,
+	}
+	sample.ensureNoZeroFields()
+	return sample
+}
+
+func sampleEdgeConnectionConfig() *EdgeConnectionConfig {
+	sample := &EdgeConnectionConfig{
+		NumHAConnections:    49,
+		HeartbeatInterval:   5 * time.Second,
+		Timeout:             9 * time.Second,
+		MaxFailedHeartbeats: 9001,
+		UserCredentialPath:  "/Users/example/.cloudflared/cert.pem",
+	}
+	sample.ensureNoZeroFields()
+	return sample
+}
+
+// sampleDoHProxyConfig initializes a new DoHProxyConfig struct,
+// applies any number of overrides to it, and returns it.
+func sampleDoHProxyConfig(overrides ...func(*DoHProxyConfig)) *DoHProxyConfig {
+	sample := &DoHProxyConfig{
+		ListenHost: "127.0.0.1",
+		ListenPort: 53,
+		Upstreams:  []string{"1.1.1.1", "1.0.0.1"},
+	}
+	sample.ensureNoZeroFields()
+	for _, f := range overrides {
+		f(sample)
+	}
+	return sample
+}
+
+// sampleReverseProxyConfig initializes a new ReverseProxyConfig struct,
+// applies any number of overrides to it, and returns it.
+func sampleReverseProxyConfig(overrides ...func(*ReverseProxyConfig)) *ReverseProxyConfig {
+	sample := &ReverseProxyConfig{
+		TunnelHostname:          "mock-non-lb-tunnel.example.com",
+		OriginConfigJSONHandler: &OriginConfigJSONHandler{&HelloWorldOriginConfig{}},
+		Retries:                 18,
+		ConnectionTimeout:       5 * time.Second,
+		CompressionQuality:      3,
+	}
+	sample.ensureNoZeroFields()
+	for _, f := range overrides {
+		f(sample)
+	}
+	return sample
+}
+
+func sampleHTTPOriginConfig(overrides ...func(*HTTPOriginConfig)) *HTTPOriginConfig {
+	sample := &HTTPOriginConfig{
+		URLString:              "https.example.com",
+		TCPKeepAlive:           7 * time.Second,
+		DialDualStack:          true,
+		TLSHandshakeTimeout:    11 * time.Second,
+		TLSVerify:              true,
+		OriginCAPool:           "/etc/cert.pem",
+		OriginServerName:       "secure.example.com",
+		MaxIdleConnections:     19,
+		IdleConnectionTimeout:  17 * time.Second,
+		ProxyConnectionTimeout: 15 * time.Second,
+		ExpectContinueTimeout:  21 * time.Second,
+		ChunkedEncoding:        true,
+	}
+	sample.ensureNoZeroFields()
+	for _, f := range overrides {
+		f(sample)
+	}
+	return sample
+}
+
+func sampleHTTPOriginConfigUnixPath(overrides ...func(*HTTPOriginConfig)) *HTTPOriginConfig {
+	sample := &HTTPOriginConfig{
+		URLString:              "unix:/var/lib/file.sock",
+		TCPKeepAlive:           7 * time.Second,
+		DialDualStack:          true,
+		TLSHandshakeTimeout:    11 * time.Second,
+		TLSVerify:              true,
+		OriginCAPool:           "/etc/cert.pem",
+		OriginServerName:       "secure.example.com",
+		MaxIdleConnections:     19,
+		IdleConnectionTimeout:  17 * time.Second,
+		ProxyConnectionTimeout: 15 * time.Second,
+		ExpectContinueTimeout:  21 * time.Second,
+		ChunkedEncoding:        true,
+	}
+	sample.ensureNoZeroFields()
+	for _, f := range overrides {
+		f(sample)
+	}
+	return sample
+}
+
+func sampleWebSocketOriginConfig(overrides ...func(*WebSocketOriginConfig)) *WebSocketOriginConfig {
+	sample := &WebSocketOriginConfig{
+		URLString:        "ssh://example.com",
+		TLSVerify:        true,
+		OriginCAPool:     "/etc/cert.pem",
+		OriginServerName: "secure.example.com",
+	}
+	sample.ensureNoZeroFields()
+	for _, f := range overrides {
+		f(sample)
+	}
+	return sample
+}
+
+func (c *ClientConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{"DoHProxyConfigs", "ReverseProxyConfigs"})
+}
+
+func (c *SupervisorConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{})
+}
+
+func (c *EdgeConnectionConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{})
+}
+
+func (c *DoHProxyConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{})
+}
+
+func (c *ReverseProxyConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{})
+}
+
+func (c *HTTPOriginConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{})
+}
+
+func (c *WebSocketOriginConfig) ensureNoZeroFields() {
+	ensureNoZeroFieldsInSample(reflect.ValueOf(c), []string{})
+}
+
+// ensureNoZeroFieldsInSample checks that all fields in the sample struct,
+// except those listed in `allowedZeroFieldNames`, are initialized to nonzero
+// values. Note that the value has to be a pointer for reflection to work
+// correctly:
+//     e := &ExampleStruct{ ... }
+//     ensureNoZeroFieldsInSample(reflect.ValueOf(e), []string{})
+//
+// Context:
+// Our tests work by taking a sample struct and marshalling/unmarshalling it.
+// This makes them easy to write, but introduces some risk: if we don't
+// include a field in the sample value, it won't be covered under tests.
+// This check reduces that risk by requiring fields to be either initialized
+// or explicitly uninitialized.
+func ensureNoZeroFieldsInSample(ptrToSampleValue reflect.Value, allowedZeroFieldNames []string) {
+	sampleValue := ptrToSampleValue.Elem()
+	structType := ptrToSampleValue.Type().Elem()
+
+	allowedZeroFieldSet := make(map[string]bool)
+	for _, name := range allowedZeroFieldNames {
+		if _, ok := structType.FieldByName(name); !ok {
+			panic(fmt.Sprintf("struct %v has no field %v", structType.Name(), name))
+		}
+		allowedZeroFieldSet[name] = true
+	}
+
+	for i := 0; i < structType.NumField(); i++ {
+		if allowedZeroFieldSet[structType.Field(i).Name] {
+			continue
+		}
+
+		zeroValue := reflect.Zero(structType.Field(i).Type)
+		if reflect.DeepEqual(zeroValue.Interface(), sampleValue.Field(i).Interface()) {
+			panic(fmt.Sprintf("In the sample value for struct %v, field %v was not initialized", structType.Name(), structType.Field(i).Name))
+		}
+	}
+}