Release 2020.5.0

RELEASE_NOTES

@@ -1,3 +1,26 @@
+2020.5.0
+- 2020-05-01 TUN-2943: Copy certutil from edge into cloudflared
+- 2020-05-05 TUN-2955: Fix connection and goroutine leaks when tunnel conection is terminated on error. Only unregister tunnels that had connected successfully. Close edge connection used to unregister the tunnel. Use buffered channels for error channels where receiver may quit early on context cancellation.
+- 2020-04-30 TUN-2940: Added delay parameter to stdin reconnect command.
+- 2020-04-27 TUN-2921: Rework address selection logic to avoid corner cases
+- 2020-04-28 TUN-2872: Exit with non-0 status code when the binary is updated so launchd will restart the service
+- 2020-04-13 AUTH-2587 add config watcher and reload logic for access client forwarder
+
+2020.4.0
+- 2020-04-10 TUN-2881: Parameterize response meta information header name in the generating function
+- 2020-04-11 TUN-2894: ResponseMetaHeader should be public
+- 2020-04-09 TUN-2880: Return metadata about source of the response from cloudflared
+- 2020-04-04 ARES-899: Fixes DoH client as system resolver. Fixes #91
+- 2020-03-31 AUTH-2394 added socks5 proxy
+- 2020-02-24 AUTH-2235 GetTokenIfExists now parses JWT payload for json expiry field to detect if the cached access token is expired
+
+2020.3.2
+- 2020-03-31 TUN-2854: Quick Reconnects should be an optional supported feature
+- 2020-03-30 TUN-2850: Tunnel stripping Cloudflare headers
+
+2020.3.1
+- 2020-03-27 TUN-2846: Trigger debug reconnects from stdin commands, not SIGUSR1
+
 2020.3.0
 - 2020-03-23 AUTH-2394 fixed header for websockets. Added TCP alias
 - 2020-03-10 TUN-2797: Fix panic in SetConnDigest by making mutexes values.

carrier/carrier.go

@@ -11,9 +11,7 @@ import (
 	"strings"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/token"
-	cloudflaredWebsocket "github.com/cloudflare/cloudflared/websocket"
-	"github.com/gorilla/websocket"
-	"github.com/sirupsen/logrus"
+	"github.com/pkg/errors"
 )
 
 type StartOptions struct {
@@ -21,6 +19,15 @@ type StartOptions struct {
 	Headers   http.Header
 }
 
+// Connection wraps up all the needed functions to forward over the tunnel
+type Connection interface {
+	// ServeStream is used to forward data from the client to the edge
+	ServeStream(*StartOptions, io.ReadWriter) error
+
+	// StartServer is used to listen for incoming connections from the edge to the origin
+	StartServer(net.Listener, string, <-chan struct{}) error
+}
+
 // StdinoutStream is empty struct for wrapping stdin/stdout
 // into a single ReadWriter
 type StdinoutStream struct {
@@ -44,86 +51,62 @@ func closeRespBody(resp *http.Response) {
 	}
 }
 
-// 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
+// StartForwarder 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 {
+func StartForwarder(conn Connection, 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
+		return errors.Wrap(err, "failed to start forwarding server")
 	}
-	logger.Info("Started listening on ", address)
-	return Serve(logger, listener, shutdownC, options)
+	return Serve(conn, listener, shutdownC, options)
+}
+
+// StartClient will copy the data from stdin/stdout over a WebSocket connection
+// to the edge (originURL)
+func StartClient(conn Connection, stream io.ReadWriter, options *StartOptions) error {
+	return serveStream(conn, stream, 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 {
+func Serve(remoteConn Connection, listener net.Listener, shutdownC <-chan struct{}, options *StartOptions) error {
 	defer listener.Close()
-	for {
-		select {
-		case <-shutdownC:
-			return nil
-		default:
+	errChan := make(chan error)
+
+	go func() {
+		for {
 			conn, err := listener.Accept()
 			if err != nil {
-				return err
+				// don't block if parent goroutine quit early
+				select {
+				case errChan <- err:
+				default:
+				}
+				return
 			}
-			go serveConnection(logger, conn, options)
+			go serveConnection(remoteConn, conn, options)
 		}
+	}()
+
+	select {
+	case <-shutdownC:
+		return nil
+	case err := <-errChan:
+		return err
 	}
 }
 
 // serveConnection handles connections for the Serve() call
-func serveConnection(logger *logrus.Logger, c net.Conn, options *StartOptions) {
+func serveConnection(remoteConn Connection, c net.Conn, options *StartOptions) {
 	defer c.Close()
-	serveStream(logger, c, options)
+	serveStream(remoteConn, 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
+func serveStream(remoteConn Connection, conn io.ReadWriter, options *StartOptions) error {
+	return remoteConn.ServeStream(options, conn)
 }
 
 // IsAccessResponse checks the http Response to see if the url location
@@ -144,49 +127,7 @@ func IsAccessResponse(resp *http.Response) bool {
 	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
+// 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 {

carrier/carrier_test.go

@@ -44,6 +44,7 @@ func (s *testStreamer) Write(p []byte) (int, error) {
 func TestStartClient(t *testing.T) {
 	message := "Good morning Austin! Time for another sunny day in the great state of Texas."
 	logger := logrus.New()
+	wsConn := NewWSConnection(logger, false)
 	ts := newTestWebSocketServer()
 	defer ts.Close()
 
@@ -52,7 +53,7 @@ func TestStartClient(t *testing.T) {
 		OriginURL: "http://" + ts.Listener.Addr().String(),
 		Headers:   nil,
 	}
-	err := StartClient(logger, buf, options)
+	err := StartClient(wsConn, buf, options)
 	assert.NoError(t, err)
 	buf.Write([]byte(message))
 
@@ -69,6 +70,7 @@ func TestStartServer(t *testing.T) {
 	message := "Good morning Austin! Time for another sunny day in the great state of Texas."
 	logger := logrus.New()
 	shutdownC := make(chan struct{})
+	wsConn := NewWSConnection(logger, false)
 	ts := newTestWebSocketServer()
 	defer ts.Close()
 	options := &StartOptions{
@@ -77,7 +79,7 @@ func TestStartServer(t *testing.T) {
 	}
 
 	go func() {
-		err := Serve(logger, listener, shutdownC, options)
+		err := Serve(wsConn, listener, shutdownC, options)
 		if err != nil {
 			t.Fatalf("Error running server: %v", err)
 		}

carrier/websocket.go

@@ -0,0 +1,137 @@
+package carrier
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/token"
+	"github.com/cloudflare/cloudflared/socks"
+	cfwebsocket "github.com/cloudflare/cloudflared/websocket"
+	"github.com/gorilla/websocket"
+	"github.com/sirupsen/logrus"
+)
+
+// Websocket is used to carry data via WS binary frames over the tunnel from client to the origin
+// This implements the functions for glider proxy (sock5) and the carrier interface
+type Websocket struct {
+	logger  *logrus.Logger
+	isSocks bool
+}
+
+type wsdialer struct {
+	conn *cfwebsocket.Conn
+}
+
+func (d *wsdialer) Dial(address string) (io.ReadWriteCloser, *socks.AddrSpec, error) {
+	local, ok := d.conn.LocalAddr().(*net.TCPAddr)
+	if !ok {
+		return nil, nil, fmt.Errorf("not a tcp connection")
+	}
+
+	addr := socks.AddrSpec{IP: local.IP, Port: local.Port}
+	return d.conn, &addr, nil
+}
+
+// NewWSConnection returns a new connection object
+func NewWSConnection(logger *logrus.Logger, isSocks bool) Connection {
+	return &Websocket{
+		logger:  logger,
+		isSocks: isSocks,
+	}
+}
+
+// ServeStream will create a Websocket client stream connection to the edge
+// it blocks and writes the raw data from conn over the tunnel
+func (ws *Websocket) ServeStream(options *StartOptions, conn io.ReadWriter) error {
+	wsConn, err := createWebsocketStream(options)
+	if err != nil {
+		ws.logger.WithError(err).Errorf("failed to connect to %s", options.OriginURL)
+		return err
+	}
+	defer wsConn.Close()
+
+	if ws.isSocks {
+		dialer := &wsdialer{conn: wsConn}
+		requestHandler := socks.NewRequestHandler(dialer)
+		socksServer := socks.NewConnectionHandler(requestHandler)
+
+		socksServer.Serve(conn)
+	} else {
+		cfwebsocket.Stream(wsConn, conn)
+	}
+	return nil
+}
+
+// StartServer creates a Websocket server to listen for connections.
+// This is used on the origin (tunnel) side to take data from the muxer and send it to the origin
+func (ws *Websocket) StartServer(listener net.Listener, remote string, shutdownC <-chan struct{}) error {
+	return cfwebsocket.StartProxyServer(ws.logger, listener, remote, shutdownC, cfwebsocket.DefaultStreamHandler)
+}
+
+// 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) (*cfwebsocket.Conn, error) {
+	req, err := http.NewRequest(http.MethodGet, options.OriginURL, nil)
+	if err != nil {
+		return nil, err
+	}
+	req.Header = options.Headers
+
+	wsConn, resp, err := cfwebsocket.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 &cfwebsocket.Conn{Conn: wsConn}, nil
+}
+
+// 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 cfwebsocket.ClientConnect(req, nil)
+}

certutil/certutil.go

@@ -0,0 +1,94 @@
+package certutil
+
+import (
+	"crypto/x509"
+	"encoding/json"
+	"encoding/pem"
+	"fmt"
+	"strings"
+)
+
+type namedTunnelToken struct {
+	ZoneID     string `json:"zoneID"`
+	AccountID  string `json:"accountID"`
+	ServiceKey string `json:"serviceKey"`
+}
+
+type OriginCert struct {
+	PrivateKey interface{}
+	Cert       *x509.Certificate
+	ZoneID     string
+	ServiceKey string
+	AccountID  string
+}
+
+func DecodeOriginCert(blocks []byte) (*OriginCert, error) {
+	if len(blocks) == 0 {
+		return nil, fmt.Errorf("Cannot decode empty certificate")
+	}
+	originCert := OriginCert{}
+	block, rest := pem.Decode(blocks)
+	for {
+		if block == nil {
+			break
+		}
+		switch block.Type {
+		case "PRIVATE KEY":
+			if originCert.PrivateKey != nil {
+				return nil, fmt.Errorf("Found multiple private key in the certificate")
+			}
+			// RSA private key
+			privateKey, err := x509.ParsePKCS8PrivateKey(block.Bytes)
+			if err != nil {
+				return nil, fmt.Errorf("Cannot parse private key")
+			}
+			originCert.PrivateKey = privateKey
+		case "CERTIFICATE":
+			if originCert.Cert != nil {
+				return nil, fmt.Errorf("Found multiple certificates in the certificate")
+			}
+			cert, err := x509.ParseCertificates(block.Bytes)
+			if err != nil {
+				return nil, fmt.Errorf("Cannot parse certificate")
+			} else if len(cert) > 1 {
+				return nil, fmt.Errorf("Found multiple certificates in the certificate")
+			}
+			originCert.Cert = cert[0]
+		case "WARP TOKEN", "ARGO TUNNEL TOKEN":
+			if originCert.ZoneID != "" || originCert.ServiceKey != "" {
+				return nil, fmt.Errorf("Found multiple tokens in the certificate")
+			}
+			// The token is a string,
+			// Try the newer JSON format
+			ntt := namedTunnelToken{}
+			if err := json.Unmarshal(block.Bytes, &ntt); err == nil {
+				originCert.ZoneID = ntt.ZoneID
+				originCert.ServiceKey = ntt.ServiceKey
+				originCert.AccountID = ntt.AccountID
+			} else {
+				// Try the older format, where the zoneID and service key are seperated by
+				// a new line character
+				token := string(block.Bytes)
+				s := strings.Split(token, "\n")
+				if len(s) != 2 {
+					return nil, fmt.Errorf("Cannot parse token")
+				}
+				originCert.ZoneID = s[0]
+				originCert.ServiceKey = s[1]
+			}
+		default:
+			return nil, fmt.Errorf("Unknown block %s in the certificate", block.Type)
+		}
+		block, rest = pem.Decode(rest)
+	}
+
+	if originCert.PrivateKey == nil {
+		return nil, fmt.Errorf("Missing private key in the certificate")
+	} else if originCert.Cert == nil {
+		return nil, fmt.Errorf("Missing certificate in the certificate")
+	} else if originCert.ZoneID == "" || originCert.ServiceKey == "" {
+		return nil, fmt.Errorf("Missing token in the certificate")
+	}
+
+	return &originCert, nil
+}

certutil/certutil_test.go

@@ -0,0 +1,67 @@
+package certutil
+
+import (
+	"fmt"
+	"io/ioutil"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLoadOriginCert(t *testing.T) {
+	cert, err := DecodeOriginCert([]byte{})
+	assert.Equal(t, fmt.Errorf("Cannot decode empty certificate"), err)
+	assert.Nil(t, cert)
+
+	blocks, err := ioutil.ReadFile("test-cert-no-key.pem")
+	assert.Nil(t, err)
+	cert, err = DecodeOriginCert(blocks)
+	assert.Equal(t, fmt.Errorf("Missing private key in the certificate"), err)
+	assert.Nil(t, cert)
+
+	blocks, err = ioutil.ReadFile("test-cert-two-certificates.pem")
+	assert.Nil(t, err)
+	cert, err = DecodeOriginCert(blocks)
+	assert.Equal(t, fmt.Errorf("Found multiple certificates in the certificate"), err)
+	assert.Nil(t, cert)
+
+	blocks, err = ioutil.ReadFile("test-cert-unknown-block.pem")
+	assert.Nil(t, err)
+	cert, err = DecodeOriginCert(blocks)
+	assert.Equal(t, fmt.Errorf("Unknown block RSA PRIVATE KEY in the certificate"), err)
+	assert.Nil(t, cert)
+
+	blocks, err = ioutil.ReadFile("test-cert.pem")
+	assert.Nil(t, err)
+	cert, err = DecodeOriginCert(blocks)
+	assert.Nil(t, err)
+	assert.NotNil(t, cert)
+	assert.Equal(t, "7b0a4d77dfb881c1a3b7d61ea9443e19", cert.ZoneID)
+	key := "v1.0-58bd4f9e28f7b3c28e05a35ff3e80ab4fd9644ef3fece537eb0d12e2e9258217-183442fbb0bbdb3e571558fec9b5589ebd77aafc87498ee3f09f64a4ad79ffe8791edbae08b36c1d8f1d70a8670de56922dff92b15d214a524f4ebfa1958859e-7ce80f79921312a6022c5d25e2d380f82ceaefe3fbdc43dd13b080e3ef1e26f7"
+	assert.Equal(t, key, cert.ServiceKey)
+}
+
+func TestNewlineArgoTunnelToken(t *testing.T) {
+	ArgoTunnelTokenTest(t, "test-argo-tunnel-cert.pem")
+}
+
+func TestJSONArgoTunnelToken(t *testing.T) {
+	// The given cert's Argo Tunnel Token was generated by base64 encoding this JSON:
+	// {
+	// "zoneID": "7b0a4d77dfb881c1a3b7d61ea9443e19",
+	// "serviceKey": "test-service-key",
+	// "accountID": "abcdabcdabcdabcd1234567890abcdef"
+	// }
+	ArgoTunnelTokenTest(t, "test-argo-tunnel-cert-json.pem")
+}
+
+func ArgoTunnelTokenTest(t *testing.T, path string) {
+	blocks, err := ioutil.ReadFile(path)
+	assert.Nil(t, err)
+	cert, err := DecodeOriginCert(blocks)
+	assert.Nil(t, err)
+	assert.NotNil(t, cert)
+	assert.Equal(t, "7b0a4d77dfb881c1a3b7d61ea9443e19", cert.ZoneID)
+	key := "test-service-key"
+	assert.Equal(t, key, cert.ServiceKey)
+}

certutil/test-argo-tunnel-cert-json.pem

@@ -0,0 +1,57 @@
+-----BEGIN PRIVATE KEY-----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+-----BEGIN CERTIFICATE-----
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certutil/test-argo-tunnel-cert.pem

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+-----BEGIN PRIVATE KEY-----
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+-----BEGIN CERTIFICATE-----
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+-----END ARGO TUNNEL TOKEN-----

certutil/test-cert-no-key.pem

@@ -0,0 +1,33 @@
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+-----BEGIN WARP TOKEN-----
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+-----END WARP TOKEN-----

certutil/test-cert-two-certificates.pem

@@ -0,0 +1,85 @@
+-----BEGIN PRIVATE KEY-----
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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certutil/test-cert-unknown-block.pem

@@ -0,0 +1,89 @@
+-----BEGIN PRIVATE KEY-----
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+-----BEGIN CERTIFICATE-----
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+-----END WARP TOKEN-----
+-----BEGIN RSA PRIVATE KEY-----
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+-----END RSA PRIVATE KEY-----

certutil/test-cert.pem

@@ -0,0 +1,61 @@
+-----BEGIN PRIVATE KEY-----
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN WARP TOKEN-----
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+ZjdiM2MyOGUwNWEzNWZmM2U4MGFiNGZkOTY0NGVmM2ZlY2U1MzdlYjBkMTJlMmU5
+MjU4MjE3LTE4MzQ0MmZiYjBiYmRiM2U1NzE1NThmZWM5YjU1ODllYmQ3N2FhZmM4
+NzQ5OGVlM2YwOWY2NGE0YWQ3OWZmZTg3OTFlZGJhZTA4YjM2YzFkOGYxZDcwYTg2
+NzBkZTU2OTIyZGZmOTJiMTVkMjE0YTUyNGY0ZWJmYTE5NTg4NTllLTdjZTgwZjc5
+OTIxMzEyYTYwMjJjNWQyNWUyZDM4MGY4MmNlYWVmZTNmYmRjNDNkZDEzYjA4MGUz
+ZWYxZTI2Zjc=
+-----END WARP TOKEN-----

cmd/cloudflared/access/carrier.go

@@ -12,6 +12,32 @@ import (
 	cli "gopkg.in/urfave/cli.v2"
 )
 
+// StartForwarder starts a client side websocket forward
+func StartForwarder(forwarder config.Forwarder, shutdown <-chan struct{}) error {
+	validURLString, err := validation.ValidateUrl(forwarder.Listener)
+	if err != nil {
+		logger.WithError(err).Error("Error validating origin URL")
+		return errors.Wrap(err, "error validating origin URL")
+	}
+
+	validURL, err := url.Parse(validURLString)
+	if err != nil {
+		logger.WithError(err).Error("Error parsing origin URL")
+		return errors.Wrap(err, "error parsing origin URL")
+	}
+
+	options := &carrier.StartOptions{
+		OriginURL: forwarder.URL,
+		Headers:   make(http.Header), //TODO: TUN-2688 support custom headers from config file
+	}
+
+	// we could add a cmd line variable for this bool if we want the SOCK5 server to be on the client side
+	wsConn := carrier.NewWSConnection(logger, false)
+
+	logger.Infof("Start Websocket listener on: %s", validURL.Host)
+	return carrier.StartForwarder(wsConn, validURL.Host, shutdown, options)
+}
+
 // 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
@@ -44,6 +70,9 @@ func ssh(c *cli.Context) error {
 		Headers:   headers,
 	}
 
+	// we could add a cmd line variable for this bool if we want the SOCK5 server to be on the client side
+	wsConn := carrier.NewWSConnection(logger, false)
+
 	if c.NArg() > 0 || c.IsSet(sshURLFlag) {
 		localForwarder, err := config.ValidateUrl(c)
 		if err != nil {
@@ -55,10 +84,12 @@ func ssh(c *cli.Context) error {
 			logger.WithError(err).Error("Error validating origin URL")
 			return errors.Wrap(err, "error validating origin URL")
 		}
-		return carrier.StartServer(logger, forwarder.Host, shutdownC, options)
+
+		logger.Infof("Start Websocket listener on: %s", forwarder.Host)
+		return carrier.StartForwarder(wsConn, forwarder.Host, shutdownC, options)
 	}
 
-	return carrier.StartClient(logger, &carrier.StdinoutStream{}, options)
+	return carrier.StartClient(wsConn, &carrier.StdinoutStream{}, options)
 }
 
 func buildRequestHeaders(values []string) http.Header {

cmd/cloudflared/app_service.go

@@ -0,0 +1,112 @@
+package main
+
+import (
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/access"
+	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
+	"github.com/sirupsen/logrus"
+)
+
+type forwarderState struct {
+	forwarder config.Forwarder
+	shutdown  chan struct{}
+}
+
+func (s *forwarderState) Shutdown() {
+	s.shutdown <- struct{}{}
+}
+
+// AppService is the main service that runs when no command lines flags are passed to cloudflared
+// it manages all the running services such as tunnels, forwarders, DNS resolver, etc
+type AppService struct {
+	configManager    config.Manager
+	shutdownC        chan struct{}
+	forwarders       map[string]forwarderState
+	configUpdateChan chan config.Root
+	logger           *logrus.Logger
+}
+
+// NewAppService creates a new AppService with needed supporting services
+func NewAppService(configManager config.Manager, shutdownC chan struct{}, logger *logrus.Logger) *AppService {
+	return &AppService{
+		configManager:    configManager,
+		shutdownC:        shutdownC,
+		forwarders:       make(map[string]forwarderState),
+		configUpdateChan: make(chan config.Root),
+		logger:           logger,
+	}
+}
+
+// Run starts the run loop to handle config updates and run forwarders, tunnels, etc
+func (s *AppService) Run() error {
+	go s.actionLoop()
+	return s.configManager.Start(s)
+}
+
+// Shutdown kills all the running services
+func (s *AppService) Shutdown() error {
+	s.configManager.Shutdown()
+	return nil
+}
+
+// ConfigDidUpdate is a delegate notification from the config manager
+// it is trigger when the config file has been updated and now the service needs
+// to update its services accordingly
+func (s *AppService) ConfigDidUpdate(c config.Root) {
+	s.configUpdateChan <- c
+}
+
+// actionLoop handles the actions from running processes
+func (s *AppService) actionLoop() {
+	for {
+		select {
+		case c := <-s.configUpdateChan:
+			s.handleConfigUpdate(c)
+		case <-s.shutdownC:
+			for _, state := range s.forwarders {
+				state.Shutdown()
+			}
+			return
+		}
+	}
+}
+
+func (s *AppService) handleConfigUpdate(c config.Root) {
+	// handle the client forward listeners
+	activeListeners := map[string]struct{}{}
+	for _, f := range c.Forwarders {
+		s.handleForwarderUpdate(f)
+		activeListeners[f.Listener] = struct{}{}
+	}
+
+	// remove any listeners that are no longer active
+	for key, state := range s.forwarders {
+		if _, ok := activeListeners[key]; !ok {
+			state.Shutdown()
+			delete(s.forwarders, key)
+		}
+	}
+
+	// TODO: AUTH-2588, TUN-1451 - tunnels and dns proxy
+}
+
+// handle managing a forwarder service
+func (s *AppService) handleForwarderUpdate(f config.Forwarder) {
+	// check if we need to start a new listener or stop an old one
+	if state, ok := s.forwarders[f.Listener]; ok {
+		if state.forwarder.Hash() == f.Hash() {
+			return // the exact same listener, no changes, so move along
+		}
+		state.Shutdown() //shutdown the listener since a new one is starting
+	}
+	// add a new forwarder to the list
+	state := forwarderState{forwarder: f, shutdown: make(chan struct{}, 1)}
+	s.forwarders[f.Listener] = state
+
+	// start the forwarder
+	go func(f forwarderState) {
+		err := access.StartForwarder(f.forwarder, f.shutdown)
+		if err != nil {
+			s.logger.WithError(err).Errorf("Forwarder at address: %s", f.forwarder)
+		}
+	}(state)
+}

cmd/cloudflared/config/manager.go

@@ -0,0 +1,101 @@
+package config
+
+import (
+	"errors"
+	"os"
+
+	"github.com/cloudflare/cloudflared/watcher"
+
+	"github.com/sirupsen/logrus"
+	"gopkg.in/yaml.v2"
+)
+
+// Notifier sends out config updates
+type Notifier interface {
+	ConfigDidUpdate(Root)
+}
+
+// Manager is the base functions of the config manager
+type Manager interface {
+	Start(Notifier) error
+	Shutdown()
+}
+
+// FileManager watches the yaml config for changes
+// sends updates to the service to reconfigure to match the updated config
+type FileManager struct {
+	watcher    watcher.Notifier
+	notifier   Notifier
+	configPath string
+	logger     *logrus.Logger
+}
+
+// NewFileManager creates a config manager
+func NewFileManager(watcher watcher.Notifier, configPath string, logger *logrus.Logger) (Manager, error) {
+	m := &FileManager{
+		watcher:    watcher,
+		configPath: configPath,
+		logger:     logger,
+	}
+	err := watcher.Add(configPath)
+	return m, err
+}
+
+// Start starts the runloop to watch for config changes
+func (m *FileManager) Start(notifier Notifier) error {
+	m.notifier = notifier
+
+	// update the notifier with a fresh config on start
+	config, err := m.GetConfig()
+	if err != nil {
+		return err
+	}
+	notifier.ConfigDidUpdate(config)
+
+	m.watcher.Start(m)
+	return nil
+}
+
+// GetConfig reads the yaml file from the disk
+func (m *FileManager) GetConfig() (Root, error) {
+	if m.configPath == "" {
+		return Root{}, errors.New("unable to find config file")
+	}
+
+	file, err := os.Open(m.configPath)
+	if err != nil {
+		return Root{}, err
+	}
+	defer file.Close()
+
+	var config Root
+	if err := yaml.NewDecoder(file).Decode(&config); err != nil {
+		return Root{}, err
+	}
+
+	return config, nil
+}
+
+// Shutdown stops the watcher
+func (m *FileManager) Shutdown() {
+	m.watcher.Shutdown()
+}
+
+// File change notifications from the watcher
+
+// WatcherItemDidChange triggers when the yaml config is updated
+// sends the updated config to the service to reload its state
+func (m *FileManager) WatcherItemDidChange(filepath string) {
+	config, err := m.GetConfig()
+	if err != nil {
+		m.logger.WithError(err).Error("Failed to read new config")
+		return
+	}
+	m.logger.Info("Config file has been updated")
+	m.notifier.ConfigDidUpdate(config)
+}
+
+// WatcherDidError notifies of errors with the file watcher
+func (m *FileManager) WatcherDidError(err error) {
+	m.logger.WithError(err).Error("Config watcher encountered an error")
+}

cmd/cloudflared/config/manager_test.go

@@ -0,0 +1,80 @@
+package config
+
+import (
+	"bufio"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/cloudflare/cloudflared/log"
+	"github.com/cloudflare/cloudflared/watcher"
+	"github.com/stretchr/testify/assert"
+	"gopkg.in/yaml.v2"
+)
+
+type mockNotifier struct {
+	configs []Root
+}
+
+func (n *mockNotifier) ConfigDidUpdate(c Root) {
+	n.configs = append(n.configs, c)
+}
+
+func writeConfig(t *testing.T, f *os.File, c *Root) {
+	f.Sync()
+	b, err := yaml.Marshal(c)
+	assert.NoError(t, err)
+
+	w := bufio.NewWriter(f)
+	_, err = w.Write(b)
+	assert.NoError(t, err)
+
+	err = w.Flush()
+	assert.NoError(t, err)
+}
+
+func TestConfigChanged(t *testing.T) {
+	filePath := "config.yaml"
+	f, err := os.Create(filePath)
+	assert.NoError(t, err)
+	defer func() {
+		f.Close()
+		os.Remove(filePath)
+	}()
+	c := &Root{
+		OrgKey:          "abcd",
+		ConfigType:      "mytype",
+		CheckinInterval: 1,
+		Forwarders: []Forwarder{
+			{
+				URL:      "test.daltoniam.com",
+				Listener: "127.0.0.1:8080",
+			},
+		},
+	}
+	writeConfig(t, f, c)
+
+	w, err := watcher.NewFile()
+	assert.NoError(t, err)
+	logger := log.CreateLogger()
+	service, err := NewFileManager(w, filePath, logger)
+	assert.NoError(t, err)
+
+	n := &mockNotifier{}
+	go service.Start(n)
+
+	c.Forwarders = append(c.Forwarders, Forwarder{URL: "add.daltoniam.com", Listener: "127.0.0.1:8081"})
+	writeConfig(t, f, c)
+
+	// give it time to trigger
+	time.Sleep(10 * time.Millisecond)
+	service.Shutdown()
+
+	assert.Len(t, n.configs, 2, "did not get 2 config updates as expected")
+	assert.Len(t, n.configs[0].Forwarders, 1, "not the amount of forwarders expected")
+	assert.Len(t, n.configs[1].Forwarders, 2, "not the amount of forwarders expected")
+
+	assert.Equal(t, n.configs[0].Forwarders[0].Hash(), c.Forwarders[0].Hash(), "forwarder hashes don't match")
+	assert.Equal(t, n.configs[1].Forwarders[0].Hash(), c.Forwarders[0].Hash(), "forwarder hashes don't match")
+	assert.Equal(t, n.configs[1].Forwarders[1].Hash(), c.Forwarders[1].Hash(), "forwarder hashes don't match")
+}

cmd/cloudflared/config/model.go

@@ -0,0 +1,37 @@
+package config
+
+import (
+	"crypto/md5"
+	"fmt"
+	"io"
+)
+
+// Forwarder represents a client side listener to forward traffic to the edge
+type Forwarder struct {
+	URL      string `json:"url"`
+	Listener string `json:"listener"`
+}
+
+// Tunnel represents a tunnel that should be started
+type Tunnel struct {
+	URL          string `json:"url"`
+	Origin       string `json:"origin"`
+	ProtocolType string `json:"type"`
+}
+
+// Root is the base options to configure the service
+type Root struct {
+	OrgKey          string      `json:"org_key"`
+	ConfigType      string      `json:"type"`
+	CheckinInterval int         `json:"checkin_interval"`
+	Forwarders      []Forwarder `json:"forwarders,omitempty"`
+	Tunnels         []Tunnel    `json:"tunnels,omitempty"`
+}
+
+// Hash returns the computed values to see if the forwarder values change
+func (f *Forwarder) Hash() string {
+	h := md5.New()
+	io.WriteString(h, f.URL)
+	io.WriteString(h, f.Listener)
+	return fmt.Sprintf("%x", h.Sum(nil))
+}

cmd/cloudflared/linux_service.go

@@ -118,10 +118,6 @@ case "$1" in
             echo "Starting $name"
             $cmd >> "$stdout_log" 2>> "$stderr_log" &
             echo $! > "$pid_file"
-            if ! is_running; then
-                echo "Unable to start, see $stdout_log and $stderr_log"
-                exit 1
-            fi
         fi
     ;;
     stop)

cmd/cloudflared/macos_service.go

@@ -60,7 +60,7 @@ func newLaunchdTemplate(installPath, stdoutPath, stderrPath string) *ServiceTemp
 			<false/>
 		</dict>
 		<key>ThrottleInterval</key>
-		<integer>20</integer>
+		<integer>5</integer>
 	</dict>
 </plist>`, launchdIdentifier, stdoutPath, stderrPath),
 	}

cmd/cloudflared/main.go

@@ -6,10 +6,12 @@ import (
 	"time"
 
 	"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/cloudflare/cloudflared/watcher"
 
 	raven "github.com/getsentry/raven-go"
 	homedir "github.com/mitchellh/go-homedir"
@@ -121,7 +123,7 @@ func isEmptyInvocation(c *cli.Context) bool {
 func action(version string, shutdownC, graceShutdownC chan struct{}) cli.ActionFunc {
 	return func(c *cli.Context) (err error) {
 		if isEmptyInvocation(c) {
-			cli.ShowAppHelpAndExit(c, 1)
+			return handleServiceMode(shutdownC)
 		}
 		tags := make(map[string]string)
 		tags["hostname"] = c.String("hostname")
@@ -161,3 +163,27 @@ func handleError(err error) {
 	}
 	raven.CaptureError(err, nil)
 }
+
+// cloudflared was started without any flags
+func handleServiceMode(shutdownC chan struct{}) error {
+	// start the main run loop that reads from the config file
+	f, err := watcher.NewFile()
+	if err != nil {
+		logger.WithError(err).Error("Cannot load config file")
+		return err
+	}
+
+	configPath := config.FindDefaultConfigPath()
+	configManager, err := config.NewFileManager(f, configPath, logger)
+	if err != nil {
+		logger.WithError(err).Error("Cannot setup config file for monitoring")
+		return err
+	}
+
+	appService := NewAppService(configManager, shutdownC, logger)
+	if err := appService.Run(); err != nil {
+		logger.WithError(err).Error("Failed to start app service")
+		return err
+	}
+	return nil
+}

cmd/cloudflared/token/token.go

@@ -2,12 +2,14 @@ package token
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"io/ioutil"
 	"net/url"
 	"os"
 	"os/signal"
 	"syscall"
+	"time"
 
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/config"
 	"github.com/cloudflare/cloudflared/cmd/cloudflared/path"
@@ -34,6 +36,21 @@ type signalHandler struct {
 	signals    []os.Signal
 }
 
+type jwtPayload struct {
+	Aud   []string `json:"aud"`
+	Email string   `json:"email"`
+	Exp   int      `json:"exp"`
+	Iat   int      `json:"iat"`
+	Nbf   int      `json:"nbf"`
+	Iss   string   `json:"iss"`
+	Type  string   `json:"type"`
+	Subt  string   `json:"sub"`
+}
+
+func (p jwtPayload) isExpired() bool {
+	return int(time.Now().Unix()) > p.Exp
+}
+
 func (s *signalHandler) register(handler func()) {
 	s.sigChannel = make(chan os.Signal, 1)
 	signal.Notify(s.sigChannel, s.signals...)
@@ -147,7 +164,7 @@ func FetchToken(appURL *url.URL) (string, error) {
 	return string(token), nil
 }
 
-// GetTokenIfExists will return the token from local storage if it exists
+// GetTokenIfExists will return the token from local storage if it exists and not expired
 func GetTokenIfExists(url *url.URL) (string, error) {
 	path, err := path.GenerateFilePathFromURL(url, keyName)
 	if err != nil {
@@ -162,6 +179,17 @@ func GetTokenIfExists(url *url.URL) (string, error) {
 		return "", err
 	}
 
+	var payload jwtPayload
+	err = json.Unmarshal(token.Payload, &payload)
+	if err != nil {
+		return "", err
+	}
+
+	if payload.isExpired() {
+		err := os.Remove(path)
+		return "", err
+	}
+
 	return token.Encode(), nil
 }
 

cmd/cloudflared/tunnel/cmd.go

@@ -1,18 +1,18 @@
 package tunnel
 
 import (
+	"bufio"
 	"context"
 	"fmt"
 	"io/ioutil"
 	"net"
 	"net/url"
 	"os"
-	ossig "os/signal"
 	"reflect"
 	"runtime"
 	"runtime/trace"
+	"strings"
 	"sync"
-	"syscall"
 	"time"
 
 	"github.com/cloudflare/cloudflared/awsuploader"
@@ -25,6 +25,7 @@ import (
 	"github.com/cloudflare/cloudflared/metrics"
 	"github.com/cloudflare/cloudflared/origin"
 	"github.com/cloudflare/cloudflared/signal"
+	"github.com/cloudflare/cloudflared/socks"
 	"github.com/cloudflare/cloudflared/sshlog"
 	"github.com/cloudflare/cloudflared/sshserver"
 	"github.com/cloudflare/cloudflared/supervisor"
@@ -38,6 +39,7 @@ import (
 	"github.com/getsentry/raven-go"
 	"github.com/gliderlabs/ssh"
 	"github.com/google/uuid"
+	"github.com/mitchellh/go-homedir"
 	"github.com/pkg/errors"
 	"gopkg.in/urfave/cli.v2"
 	"gopkg.in/urfave/cli.v2/altsrc"
@@ -78,6 +80,9 @@ const (
 	// hostKeyPath is the path of the dir to save SSH host keys too
 	hostKeyPath = "host-key-path"
 
+	// socks5Flag is to enable the socks server to deframe
+	socks5Flag = "socks5"
+
 	noIntentMsg = "The --intent argument is required. Cloudflared looks up an Intent to determine what configuration to use (i.e. which tunnels to start). If you don't have any Intents yet, you can use a placeholder Intent Label for now. Then, when you make an Intent with that label, cloudflared will get notified and open the tunnels you specified in that Intent."
 )
 
@@ -135,6 +140,12 @@ func Commands() []*cli.Command {
 					Value:   cli.NewStringSlice("https://1.1.1.1/dns-query", "https://1.0.0.1/dns-query"),
 					EnvVars: []string{"TUNNEL_DNS_UPSTREAM"},
 				},
+				&cli.StringSliceFlag{
+					Name:    "bootstrap",
+					Usage:   "bootstrap endpoint URL, you can specify multiple endpoints for redundancy.",
+					Value:   cli.NewStringSlice("https://162.159.36.1/dns-query", "https://162.159.46.1/dns-query", "https://[2606:4700:4700::1111]/dns-query", "https://[2606:4700:4700::1001]/dns-query"),
+					EnvVars: []string{"TUNNEL_DNS_BOOTSTRAP"},
+				},
 			},
 			ArgsUsage: " ", // can't be the empty string or we get the default output
 			Hidden:    false,
@@ -391,7 +402,18 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 		wg.Add(1)
 		go func() {
 			defer wg.Done()
-			errC <- websocket.StartProxyServer(logger, listener, host, shutdownC)
+			streamHandler := websocket.DefaultStreamHandler
+			if c.IsSet(socks5Flag) {
+				logger.Info("SOCKS5 server started")
+				streamHandler = func(wsConn *websocket.Conn, remoteConn net.Conn) {
+					dialer := socks.NewConnDialer(remoteConn)
+					requestHandler := socks.NewRequestHandler(dialer)
+					socksServer := socks.NewConnectionHandler(requestHandler)
+
+					socksServer.Serve(wsConn)
+				}
+			}
+			errC <- websocket.StartProxyServer(logger, listener, host, shutdownC, streamHandler)
 		}()
 		c.Set("url", "http://"+listener.Addr().String())
 	}
@@ -401,16 +423,17 @@ func StartServer(c *cli.Context, version string, shutdownC, graceShutdownC chan
 		return err
 	}
 
-	// When the user sends SIGUSR1, disconnect all connections.
-	reconnectCh := make(chan os.Signal, 1)
-	ossig.Notify(reconnectCh, syscall.SIGUSR1)
+	reconnectCh := make(chan origin.ReconnectSignal, 1)
+	if c.IsSet("stdin-control") {
+		logger.Warn("Enabling control through stdin")
+		go stdinControl(reconnectCh)
+	}
 
 	wg.Add(1)
 	go func() {
 		defer wg.Done()
 		errC <- origin.StartTunnelDaemon(ctx, tunnelConfig, connectedSignal, cloudflaredID, reconnectCh)
 	}()
-
 	return waitToShutdown(&wg, errC, shutdownC, graceShutdownC, c.Duration("grace-period"))
 }
 
@@ -584,9 +607,15 @@ func notifySystemd(waitForSignal *signal.Signal) {
 
 func writePidFile(waitForSignal *signal.Signal, pidFile string) {
 	<-waitForSignal.Wait()
-	file, err := os.Create(pidFile)
+	expandedPath, err := homedir.Expand(pidFile)
 	if err != nil {
-		logger.WithError(err).Errorf("Unable to write pid to %s", pidFile)
+		logger.WithError(err).Errorf("Unable to expand %s, try to use absolute path in --pidfile", pidFile)
+		return
+	}
+	file, err := os.Create(expandedPath)
+	if err != nil {
+		logger.WithError(err).Errorf("Unable to write pid to %s", expandedPath)
+		return
 	}
 	defer file.Close()
 	fmt.Fprintf(file, "%d", os.Getpid())
@@ -947,6 +976,13 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"TUNNEL_DNS_UPSTREAM"},
 			Hidden:  shouldHide,
 		}),
+		altsrc.NewStringSliceFlag(&cli.StringSliceFlag{
+			Name:    "proxy-dns-bootstrap",
+			Usage:   "bootstrap endpoint URL, you can specify multiple endpoints for redundancy.",
+			Value:   cli.NewStringSlice("https://162.159.36.1/dns-query", "https://162.159.46.1/dns-query", "https://[2606:4700:4700::1111]/dns-query", "https://[2606:4700:4700::1001]/dns-query"),
+			EnvVars: []string{"TUNNEL_DNS_BOOTSTRAP"},
+			Hidden:  shouldHide,
+		}),
 		altsrc.NewDurationFlag(&cli.DurationFlag{
 			Name:    "grace-period",
 			Usage:   "Duration to accept new requests after cloudflared receives first SIGINT/SIGTERM. A second SIGINT/SIGTERM will force cloudflared to shutdown immediately.",
@@ -1066,5 +1102,52 @@ func tunnelFlags(shouldHide bool) []cli.Flag {
 			EnvVars: []string{"HOST_KEY_PATH"},
 			Hidden:  true,
 		}),
+		altsrc.NewBoolFlag(&cli.BoolFlag{
+			Name:    "stdin-control",
+			Usage:   "Control the process using commands sent through stdin",
+			EnvVars: []string{"STDIN-CONTROL"},
+			Hidden:  true,
+			Value:   false,
+		}),
+		altsrc.NewBoolFlag(&cli.BoolFlag{
+			Name:    socks5Flag,
+			Usage:   "specify if this tunnel is running as a SOCK5 Server",
+			EnvVars: []string{"TUNNEL_SOCKS"},
+			Value:   false,
+			Hidden:  false,
+		}),
+	}
+}
+
+func stdinControl(reconnectCh chan origin.ReconnectSignal) {
+	for {
+		scanner := bufio.NewScanner(os.Stdin)
+		for scanner.Scan() {
+			command := scanner.Text()
+			parts := strings.SplitN(command, " ", 2)
+
+			switch parts[0] {
+			case "":
+				break
+			case "reconnect":
+				var reconnect origin.ReconnectSignal
+				if len(parts) > 1 {
+					var err error
+					if reconnect.Delay, err = time.ParseDuration(parts[1]); err != nil {
+						logger.Error(err.Error())
+						continue
+					}
+				}
+				logger.Infof("Sending reconnect signal %+v", reconnect)
+				reconnectCh <- reconnect
+			default:
+				logger.Warn("Unknown command: ", command)
+				fallthrough
+			case "help":
+				logger.Info(`Supported command: 
+reconnect [delay] 
+- restarts one randomly chosen connection with optional delay before reconnect`)
+			}
+		}
 	}
 }

cmd/cloudflared/tunnel/server.go

@@ -14,7 +14,7 @@ func runDNSProxyServer(c *cli.Context, dnsReadySignal, shutdownC chan struct{})
 		logger.Errorf("The 'proxy-dns-port' must be a valid port number in <1, 65535> range.")
 		return errors.New("The 'proxy-dns-port' must be a valid port number in <1, 65535> range.")
 	}
-	listener, err := tunneldns.CreateListener(c.String("proxy-dns-address"), uint16(port), c.StringSlice("proxy-dns-upstream"))
+	listener, err := tunneldns.CreateListener(c.String("proxy-dns-address"), uint16(port), c.StringSlice("proxy-dns-upstream"), c.StringSlice("proxy-dns-bootstrap"))
 	if err != nil {
 		close(dnsReadySignal)
 		listener.Stop()

cmd/cloudflared/tunnel/signal.go

@@ -17,9 +17,11 @@ func waitForSignal(errC chan error, shutdownC chan struct{}) error {
 
 	select {
 	case err := <-errC:
+		logger.Infof("terminating due to error: %v", err)
 		close(shutdownC)
 		return err
-	case <-signals:
+	case s := <-signals:
+		logger.Infof("terminating due to signal %s", s)
 		close(shutdownC)
 	case <-shutdownC:
 	}
@@ -44,10 +46,12 @@ func waitForSignalWithGraceShutdown(errC chan error,
 
 	select {
 	case err := <-errC:
+		logger.Infof("Initiating graceful shutdown due to %v ...", err)
 		close(graceShutdownC)
 		close(shutdownC)
 		return err
-	case <-signals:
+	case s := <-signals:
+		logger.Infof("Initiating graceful shutdown due to signal %s ...", s)
 		close(graceShutdownC)
 		waitForGracePeriod(signals, errC, shutdownC, gracePeriod)
 	case <-graceShutdownC:
@@ -64,7 +68,6 @@ func waitForGracePeriod(signals chan os.Signal,
 	shutdownC chan struct{},
 	gracePeriod time.Duration,
 ) {
-	logger.Infof("Initiating graceful shutdown...")
 	// Unregister signal handler early, so the client can send a second SIGTERM/SIGINT
 	// to force shutdown cloudflared
 	signal.Stop(signals)

cmd/cloudflared/updater/update.go

@@ -2,6 +2,7 @@ package updater
 
 import (
 	"context"
+	"fmt"
 	"os"
 	"runtime"
 	"time"
@@ -32,6 +33,33 @@ EKx0BZogHSor9Wy5VztdFaAaVbsJiCbO
 	logger = log.CreateLogger()
 )
 
+// BinaryUpdated implements ExitCoder interface, the app will exit with status code 11
+// https://pkg.go.dev/gopkg.in/urfave/cli.v2?tab=doc#ExitCoder
+type statusSuccess struct {
+	newVersion string
+}
+
+func (u *statusSuccess) Error() string {
+	return fmt.Sprintf("cloudflared has been updated to version %s", u.newVersion)
+}
+
+func (u *statusSuccess) ExitCode() int {
+	return 11
+}
+
+// UpdateErr implements ExitCoder interface, the app will exit with status code 10
+type statusErr struct {
+	err error
+}
+
+func (e *statusErr) Error() string {
+	return fmt.Sprintf("failed to update cloudflared: %v", e.err)
+}
+
+func (e *statusErr) ExitCode() int {
+	return 10
+}
+
 type UpdateOutcome struct {
 	Updated bool
 	Version string
@@ -67,14 +95,15 @@ func checkForUpdateAndApply() UpdateOutcome {
 func Update(_ *cli.Context) error {
 	updateOutcome := loggedUpdate()
 	if updateOutcome.Error != nil {
-		os.Exit(10)
+		return &statusErr{updateOutcome.Error}
 	}
 
 	if updateOutcome.noUpdate() {
 		logger.Infof("cloudflared is up to date (%s)", updateOutcome.Version)
+		return nil
 	}
 
-	return updateOutcome.Error
+	return &statusSuccess{newVersion: updateOutcome.Version}
 }
 
 // Checks for an update and applies it if one is available
@@ -126,15 +155,19 @@ func (a *AutoUpdater) Run(ctx context.Context) error {
 			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
+				if IsSysV() {
+					// SysV doesn't have a mechanism to keep service alive, we have to restart the process
+					logger.Infof("Restarting service managed by SysV...")
+					pid, err := a.listeners.StartProcess()
+					if err != nil {
+						logger.WithError(err).Error("Unable to restart server automatically")
+						return &statusErr{err: 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)
 				}
-				// 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
+				return &statusSuccess{newVersion: updateOutcome.Version}
 			}
 		}
 		select {
@@ -187,3 +220,14 @@ func SupportAutoUpdate() bool {
 func isRunningFromTerminal() bool {
 	return terminal.IsTerminal(int(os.Stdout.Fd()))
 }
+
+func IsSysV() bool {
+	if runtime.GOOS != "linux" {
+		return false
+	}
+
+	if _, err := os.Stat("/run/systemd/system"); err == nil {
+		return false
+	}
+	return true
+}

connection/features.go

@@ -1,9 +0,0 @@
-package connection
-
-const (
-	FeatureSerializedHeaders = "serialized_headers"
-)
-
-var SupportedFeatures = []string{
-	FeatureSerializedHeaders,
-}

edgediscovery/allregions/region.go

@@ -2,6 +2,8 @@ package allregions
 
 import (
 	"net"
+
+	"github.com/sirupsen/logrus"
 )
 
 // Region contains cloudflared edge addresses. The edge is partitioned into several regions for
@@ -56,6 +58,10 @@ func (r Region) GetUnusedIP(excluding *net.TCPAddr) *net.TCPAddr {
 
 // Use the address, assigning it to a proxy connection.
 func (r Region) Use(addr *net.TCPAddr, connID int) {
+	if addr == nil {
+		logrus.Errorf("Attempted to use nil address for connection %d", connID)
+		return
+	}
 	r.connFor[addr] = InUse(connID)
 }
 

edgediscovery/allregions/regions.go

@@ -86,21 +86,28 @@ func (rs *Regions) AddrUsedBy(connID int) *net.TCPAddr {
 // GetUnusedAddr gets an unused addr from the edge, excluding the given addr. Prefer to use addresses
 // evenly across both regions.
 func (rs *Regions) GetUnusedAddr(excluding *net.TCPAddr, connID int) *net.TCPAddr {
-	var addr *net.TCPAddr
 	if rs.region1.AvailableAddrs() > rs.region2.AvailableAddrs() {
-		addr = rs.region1.GetUnusedIP(excluding)
-		rs.region1.Use(addr, connID)
-	} else {
-		addr = rs.region2.GetUnusedIP(excluding)
-		rs.region2.Use(addr, connID)
+		return getAddrs(excluding, connID, &rs.region1, &rs.region2)
 	}
 
-	if addr == nil {
-		return nil
+	return getAddrs(excluding, connID, &rs.region2, &rs.region1)
+}
+
+// getAddrs tries to grab address form `first` region, then `second` region
+// this is an unrolled loop over 2 element array
+func getAddrs(excluding *net.TCPAddr, connID int, first *Region, second *Region) *net.TCPAddr {
+	addr := first.GetUnusedIP(excluding)
+	if addr != nil {
+		first.Use(addr, connID)
+		return addr
+	}
+	addr = second.GetUnusedIP(excluding)
+	if addr != nil {
+		second.Use(addr, connID)
+		return addr
 	}
 
-	// Mark the address as used and return it
-	return addr
+	return nil
 }
 
 // AvailableAddrs returns how many edge addresses aren't used.

edgediscovery/allregions/regions_test.go

@@ -58,6 +58,7 @@ func TestRegions_Giveback_Region1(t *testing.T) {
 	rs.GiveBack(&addr0)
 	assert.Equal(t, &addr0, rs.GetUnusedAddr(nil, 3))
 }
+
 func TestRegions_Giveback_Region2(t *testing.T) {
 	rs := makeRegions()
 	rs.region1.Use(&addr0, 0)

edgediscovery/edgediscovery.go

@@ -100,7 +100,7 @@ func (ed *Edge) GetAddr(connID int) (*net.TCPAddr, error) {
 		logger.Debug("No addresses left to give proxy connection")
 		return nil, errNoAddressesLeft
 	}
-	logger.Debug("Giving connection its new address")
+	logger.Debugf("Giving connection its new address %s", addr)
 	return addr, nil
 }
 
@@ -120,9 +120,10 @@ func (ed *Edge) GetDifferentAddr(connID int) (*net.TCPAddr, error) {
 	addr := ed.regions.GetUnusedAddr(oldAddr, connID)
 	if addr == nil {
 		logger.Debug("No addresses left to give proxy connection")
+		// note: if oldAddr were not nil, it will become available on the next iteration
 		return nil, errNoAddressesLeft
 	}
-	logger.Debug("Giving connection its new address")
+	logger.Debugf("Giving connection its new address %s", addr)
 	return addr, nil
 }
 

edgediscovery/edgediscovery_test.go

@@ -83,6 +83,30 @@ func TestGetAddrForRPC(t *testing.T) {
 	assert.Equal(t, 4, edge.AvailableAddrs())
 }
 
+func TestOnePerRegion(t *testing.T) {
+	l := logrus.New()
+
+	// Make an edge with only one address
+	edge := MockEdge(l, []*net.TCPAddr{&addr0, &addr1})
+
+	// Use the only address
+	const connID = 0
+	a1, err := edge.GetAddr(connID)
+	assert.NoError(t, err)
+	assert.NotNil(t, a1)
+
+	// if the first address is bad, get the second one
+	a2, err := edge.GetDifferentAddr(connID)
+	assert.NoError(t, err)
+	assert.NotNil(t, a2)
+	assert.NotEqual(t, a1, a2)
+
+	// now that second one is bad, get the first one again
+	a3, err := edge.GetDifferentAddr(connID)
+	assert.NoError(t, err)
+	assert.Equal(t, a1, a3)
+}
+
 func TestOnlyOneAddrLeft(t *testing.T) {
 	l := logrus.New()
 
@@ -98,6 +122,11 @@ func TestOnlyOneAddrLeft(t *testing.T) {
 	// If that edge address is "bad", there's no alternative address.
 	_, err = edge.GetDifferentAddr(connID)
 	assert.Error(t, err)
+
+	// previously bad address should become available again on next iteration.
+	addr, err = edge.GetDifferentAddr(connID)
+	assert.NoError(t, err)
+	assert.NotNil(t, addr)
 }
 
 func TestNoAddrsLeft(t *testing.T) {

go.mod

@@ -3,12 +3,14 @@ module github.com/cloudflare/cloudflared
 go 1.12
 
 require (
+	github.com/BurntSushi/go-sumtype v0.0.0-20190304192233-fcb4a6205bdc // indirect
 	github.com/DATA-DOG/go-sqlmock v1.3.3
 	github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 // indirect
 	github.com/aws/aws-sdk-go v1.25.8
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/certifi/gocertifi v0.0.0-20180118203423-deb3ae2ef261 // indirect
+	github.com/certifi/gocertifi v0.0.0-20200211180108-c7c1fbc02894 // indirect
 	github.com/cloudflare/brotli-go v0.0.0-20191101163834-d34379f7ff93
+	github.com/cloudflare/cfssl v0.0.0-20141119014638-2f7f44e802e2
 	github.com/cloudflare/golibs v0.0.0-20170913112048-333127dbecfc
 	github.com/coredns/coredns v1.2.0
 	github.com/coreos/go-oidc v0.0.0-20171002155002-a93f71fdfe73
@@ -21,11 +23,11 @@ require (
 	github.com/facebookgo/stack v0.0.0-20160209184415-751773369052 // indirect
 	github.com/facebookgo/subset v0.0.0-20150612182917-8dac2c3c4870 // indirect
 	github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568 // indirect
+	github.com/fsnotify/fsnotify v1.4.9
 	github.com/getsentry/raven-go v0.0.0-20180517221441-ed7bcb39ff10
 	github.com/gliderlabs/ssh v0.0.0-20191009160644-63518b5243e0
 	github.com/go-sql-driver/mysql v1.4.1
 	github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3
-	github.com/google/certificate-transparency-go v1.1.0 // indirect
 	github.com/google/uuid v1.1.1
 	github.com/gorilla/mux v1.7.3
 	github.com/gorilla/websocket v1.4.0
@@ -33,6 +35,7 @@ require (
 	github.com/jmoiron/sqlx v1.2.0
 	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
 	github.com/kshvakov/clickhouse v1.3.11
+	github.com/kylelemons/godebug v1.1.0 // indirect
 	github.com/lib/pq v1.2.0
 	github.com/mattn/go-colorable v0.1.4
 	github.com/mattn/go-isatty v0.0.10 // indirect
@@ -54,15 +57,17 @@ require (
 	github.com/tinylib/msgp v1.1.0 // indirect
 	github.com/xo/dburl v0.0.0-20191005012637-293c3298d6c0
 	golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550
-	golang.org/x/net v0.0.0-20191007182048-72f939374954
+	golang.org/x/net v0.0.0-20191014212845-da9a3fd4c582
+	golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45 // indirect
 	golang.org/x/sync v0.0.0-20190423024810-112230192c58
-	golang.org/x/sys v0.0.0-20191008105621-543471e840be
+	golang.org/x/sys v0.0.0-20191020212454-3e7259c5e7c2
+	google.golang.org/appengine v1.5.0 // indirect
 	google.golang.org/genproto v0.0.0-20191007204434-a023cd5227bd // indirect
 	google.golang.org/grpc v1.24.0 // indirect
 	gopkg.in/coreos/go-oidc.v2 v2.1.0
 	gopkg.in/square/go-jose.v2 v2.4.0 // indirect
 	gopkg.in/urfave/cli.v2 v2.0.0-20180128181224-d604b6ffeee8
-	gopkg.in/yaml.v2 v2.2.4 // indirect
+	gopkg.in/yaml.v2 v2.2.4
 	zombiezen.com/go/capnproto2 v0.0.0-20180616160808-7cfd211c19c7
 )
 

go.sum

@@ -1,59 +1,53 @@
+bitbucket.org/liamstask/goose v0.0.0-20150115234039-8488cc47d90c/go.mod h1:hSVuE3qU7grINVSwrmzHfpg9k87ALBk+XaualNyUzI4=
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-contrib.go.opencensus.io/exporter/stackdriver v0.12.1/go.mod h1:iwB6wGarfphGGe/e5CWqyUk/cLzKnWsOKPVW3no6OTw=
-contrib.go.opencensus.io/resource v0.1.1/go.mod h1:F361eGI91LCmW1I/Saf+rX0+OFcigGlFvXwEGEnkRLA=
+github.com/BurntSushi/go-sumtype v0.0.0-20190304192233-fcb4a6205bdc h1:nvTP+jmloR0+J4YQur/rLRdLcGVEU4SquDgH+Bo7gBY=
+github.com/BurntSushi/go-sumtype v0.0.0-20190304192233-fcb4a6205bdc/go.mod h1:7yTWMMG2vOm4ABVciEt4EgNVP7fxwtcKIb/EuiLiKqY=
 github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/DATA-DOG/go-sqlmock v1.3.3 h1:CWUqKXe0s8A2z6qCgkP4Kru7wC11YoAnoupUKFDnH08=
 github.com/DATA-DOG/go-sqlmock v1.3.3/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
-github.com/OpenPeeDeeP/depguard v1.0.0/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
-github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
+github.com/GeertJohan/go.incremental v1.0.0/go.mod h1:6fAjUhbVuX1KcMD3c8TEgVUqmo4seqhv0i0kdATSkM0=
+github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtixis4Tib9if0=
+github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
 github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
-github.com/aws/aws-sdk-go v1.19.18/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.25.8 h1:n7I+HUUXjun2CsX7JK+1hpRIkZrlKhd3nayeb+Xmavs=
 github.com/aws/aws-sdk-go v1.25.8/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/bkaradzic/go-lz4 v1.0.0 h1:RXc4wYsyz985CkXXeX04y4VnZFGG8Rd43pRaHsOXAKk=
 github.com/bkaradzic/go-lz4 v1.0.0/go.mod h1:0YdlkowM3VswSROI7qDxhRvJ3sLhlFrRRwjwegp5jy4=
-github.com/census-instrumentation/opencensus-proto v0.2.0/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/certifi/gocertifi v0.0.0-20180118203423-deb3ae2ef261 h1:6/yVvBsKeAw05IUj4AzvrxaCnDjN4nUqKjW9+w5wixg=
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 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
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h2mux/h2mux.go

@@ -206,9 +206,9 @@ func Handshake(
 		initialStreamWindow:     m.config.DefaultWindowSize,
 		streamWindowMax:         m.config.MaxWindowSize,
 		streamWriteBufferMaxLen: m.config.StreamWriteBufferMaxLen,
-		r:                       m.r,
-		metricsUpdater:          m.muxMetricsUpdater,
-		bytesRead:               inBoundCounter,
+		r:              m.r,
+		metricsUpdater: m.muxMetricsUpdater,
+		bytesRead:      inBoundCounter,
 	}
 	m.muxWriter = &MuxWriter{
 		f:               m.f,
@@ -327,7 +327,11 @@ func (m *Muxer) Serve(ctx context.Context) error {
 			m.explicitShutdown.Fuse(false)
 			m.r.Close()
 			m.abort()
-			ch <- err
+			// don't block if parent goroutine quit early
+			select {
+			case ch <- err:
+			default:
+			}
 		}()
 		select {
 		case err := <-ch:
@@ -344,7 +348,11 @@ func (m *Muxer) Serve(ctx context.Context) error {
 			m.explicitShutdown.Fuse(false)
 			m.w.Close()
 			m.abort()
-			ch <- err
+			// don't block if parent goroutine quit early
+			select {
+			case ch <- err:
+			default:
+			}
 		}()
 		select {
 		case err := <-ch:
@@ -358,7 +366,11 @@ func (m *Muxer) Serve(ctx context.Context) error {
 		ch := make(chan error)
 		go func() {
 			err := m.muxMetricsUpdater.run(m.config.Logger)
-			ch <- err
+			// don't block if parent goroutine quit early
+			select {
+			case ch <- err:
+			default:
+			}
 		}()
 		select {
 		case err := <-ch:

h2mux/header.go

@@ -2,6 +2,7 @@ package h2mux
 
 import (
 	"encoding/base64"
+	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/url"
@@ -20,6 +21,10 @@ var headerEncoding = base64.RawStdEncoding
 const (
 	RequestUserHeadersField  = "cf-cloudflared-request-headers"
 	ResponseUserHeadersField = "cf-cloudflared-response-headers"
+
+	ResponseMetaHeaderField   = "cf-cloudflared-response-meta"
+	ResponseSourceCloudflared = "cloudflared"
+	ResponseSourceOrigin      = "origin"
 )
 
 // H2RequestHeadersToH1Request converts the HTTP/2 headers coming from origintunneld
@@ -28,6 +33,10 @@ const (
 // HTTP/1 equivalents. See https://tools.ietf.org/html/rfc7540#section-8.1.2.3
 func H2RequestHeadersToH1Request(h2 []Header, h1 *http.Request) error {
 	for _, header := range h2 {
+		if !IsControlHeader(header.Name) {
+			continue
+		}
+
 		switch strings.ToLower(header.Name) {
 		case ":method":
 			h1.Method = header.Value
@@ -72,25 +81,22 @@ func H2RequestHeadersToH1Request(h2 []Header, h1 *http.Request) error {
 				return fmt.Errorf("unparseable content length")
 			}
 			h1.ContentLength = contentLength
-		case "connection", "upgrade":
-			// for websocket header support
-			h1.Header.Add(http.CanonicalHeaderKey(header.Name), header.Value)
+		case RequestUserHeadersField:
+			// Do not forward the serialized headers to the origin -- deserialize them, and ditch the serialized version
+			// Find and parse user headers serialized into a single one
+			userHeaders, err := ParseUserHeaders(RequestUserHeadersField, h2)
+			if err != nil {
+				return errors.Wrap(err, "Unable to parse user headers")
+			}
+			for _, userHeader := range userHeaders {
+				h1.Header.Add(http.CanonicalHeaderKey(userHeader.Name), userHeader.Value)
+			}
 		default:
-			// Ignore any other header;
-			// User headers will be read from `RequestUserHeadersField`
-			continue
+			// All other control headers shall just be proxied transparently
+			h1.Header.Add(http.CanonicalHeaderKey(header.Name), header.Value)
 		}
 	}
 
-	// Find and parse user headers serialized into a single one
-	userHeaders, err := ParseUserHeaders(RequestUserHeadersField, h2)
-	if err != nil {
-		return errors.Wrap(err, "Unable to parse user headers")
-	}
-	for _, userHeader := range userHeaders {
-		h1.Header.Add(http.CanonicalHeaderKey(userHeader.Name), userHeader.Value)
-	}
-
 	return nil
 }
 
@@ -225,3 +231,19 @@ func CreateSerializedHeaders(headersField string, headers ...http.Header) []Head
 		strings.Join(serializedHeaderChunks, ";"),
 	}}
 }
+
+type ResponseMetaHeader struct {
+	Source string `json:"src"`
+}
+
+func CreateResponseMetaHeader(headerName, source string) Header {
+	jsonResponseMetaHeader, err := json.Marshal(ResponseMetaHeader{Source: source})
+	if err != nil {
+		panic(err)
+	}
+
+	return Header{
+		Name:  headerName,
+		Value: string(jsonResponseMetaHeader),
+	}
+}

origin/external_control.go

@@ -0,0 +1,21 @@
+package origin
+
+import (
+	"time"
+)
+
+type ReconnectSignal struct {
+	// wait this many seconds before re-establish the connection
+	Delay time.Duration
+}
+
+// Error allows us to use ReconnectSignal as a special error to force connection abort
+func (r *ReconnectSignal) Error() string {
+	return "reconnect signal"
+}
+
+func (r *ReconnectSignal) DelayBeforeReconnect() {
+	if r.Delay > 0 {
+		time.Sleep(r.Delay)
+	}
+}

origin/supervisor.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"net"
-	"os"
 	"sync"
 	"time"
 
@@ -106,7 +105,7 @@ func NewSupervisor(config *TunnelConfig, u uuid.UUID) (*Supervisor, error) {
 	}, nil
 }
 
-func (s *Supervisor) Run(ctx context.Context, connectedSignal *signal.Signal, reconnectCh chan os.Signal) error {
+func (s *Supervisor) Run(ctx context.Context, connectedSignal *signal.Signal, reconnectCh chan ReconnectSignal) error {
 	logger := s.config.Logger
 	if err := s.initialize(ctx, connectedSignal, reconnectCh); err != nil {
 		return err
@@ -192,7 +191,7 @@ func (s *Supervisor) Run(ctx context.Context, connectedSignal *signal.Signal, re
 }
 
 // Returns nil if initialization succeeded, else the initialization error.
-func (s *Supervisor) initialize(ctx context.Context, connectedSignal *signal.Signal, reconnectCh chan os.Signal) error {
+func (s *Supervisor) initialize(ctx context.Context, connectedSignal *signal.Signal, reconnectCh chan ReconnectSignal) error {
 	logger := s.logger
 
 	s.lastResolve = time.Now()
@@ -222,7 +221,7 @@ func (s *Supervisor) initialize(ctx context.Context, connectedSignal *signal.Sig
 
 // 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 *signal.Signal, reconnectCh chan os.Signal) {
+func (s *Supervisor) startFirstTunnel(ctx context.Context, connectedSignal *signal.Signal, reconnectCh chan ReconnectSignal) {
 	var (
 		addr *net.TCPAddr
 		err  error
@@ -266,7 +265,7 @@ func (s *Supervisor) startFirstTunnel(ctx context.Context, connectedSignal *sign
 
 // 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 *signal.Signal, reconnectCh chan os.Signal) {
+func (s *Supervisor) startTunnel(ctx context.Context, index int, connectedSignal *signal.Signal, reconnectCh chan ReconnectSignal) {
 	var (
 		addr *net.TCPAddr
 		err  error
@@ -275,7 +274,7 @@ func (s *Supervisor) startTunnel(ctx context.Context, index int, connectedSignal
 		s.tunnelErrors <- tunnelError{index: index, addr: addr, err: err}
 	}()
 
-	addr, err = s.edgeIPs.GetAddr(index)
+	addr, err = s.edgeIPs.GetDifferentAddr(index)
 	if err != nil {
 		return
 	}

origin/tunnel.go

@@ -9,7 +9,6 @@ import (
 	"net"
 	"net/http"
 	"net/url"
-	"os"
 	"strconv"
 	"strings"
 	"sync"
@@ -40,6 +39,8 @@ const (
 	lbProbeUserAgentPrefix   = "Mozilla/5.0 (compatible; Cloudflare-Traffic-Manager/1.0; +https://www.cloudflare.com/traffic-manager/;"
 	TagHeaderNamePrefix      = "Cf-Warp-Tag-"
 	DuplicateConnectionError = "EDUPCONN"
+	FeatureSerializedHeaders = "serialized_headers"
+	FeatureQuickReconnects   = "quick_reconnects"
 )
 
 type registerRPCName string
@@ -166,11 +167,19 @@ func (c *TunnelConfig) RegistrationOptions(connectionID uint8, OriginLocalIP str
 		RunFromTerminal:      c.RunFromTerminal,
 		CompressionQuality:   c.CompressionQuality,
 		UUID:                 uuid.String(),
-		Features:             connection.SupportedFeatures,
+		Features:             c.SupportedFeatures(),
 	}
 }
 
-func StartTunnelDaemon(ctx context.Context, config *TunnelConfig, connectedSignal *signal.Signal, cloudflaredID uuid.UUID, reconnectCh chan os.Signal) error {
+func (c *TunnelConfig) SupportedFeatures() []string {
+	basic := []string{FeatureSerializedHeaders}
+	if c.UseQuickReconnects {
+		basic = append(basic, FeatureQuickReconnects)
+	}
+	return basic
+}
+
+func StartTunnelDaemon(ctx context.Context, config *TunnelConfig, connectedSignal *signal.Signal, cloudflaredID uuid.UUID, reconnectCh chan ReconnectSignal) error {
 	s, err := NewSupervisor(config, cloudflaredID)
 	if err != nil {
 		return err
@@ -186,7 +195,7 @@ func ServeTunnelLoop(ctx context.Context,
 	connectedSignal *signal.Signal,
 	u uuid.UUID,
 	bufferPool *buffer.Pool,
-	reconnectCh chan os.Signal,
+	reconnectCh chan ReconnectSignal,
 ) error {
 	connectionLogger := config.Logger.WithField("connectionID", connectionID)
 	config.Metrics.incrementHaConnections()
@@ -235,7 +244,7 @@ func ServeTunnel(
 	backoff *BackoffHandler,
 	u uuid.UUID,
 	bufferPool *buffer.Pool,
-	reconnectCh chan os.Signal,
+	reconnectCh chan ReconnectSignal,
 ) (err error, recoverable bool) {
 	// Treat panics as recoverable errors
 	defer func() {
@@ -313,7 +322,10 @@ func ServeTunnel(
 			select {
 			case <-serveCtx.Done():
 				// UnregisterTunnel blocks until the RPC call returns
-				err := UnregisterTunnel(handler.muxer, config.GracePeriod, config.TransportLogger)
+				var err error
+				if connectedFuse.Value() {
+					err = UnregisterTunnel(handler.muxer, config.GracePeriod, config.TransportLogger)
+				}
 				handler.muxer.Shutdown()
 				return err
 			case <-updateMetricsTickC:
@@ -323,13 +335,14 @@ func ServeTunnel(
 	})
 
 	errGroup.Go(func() error {
-		select {
-		case <-reconnectCh:
-			return fmt.Errorf("received disconnect signal")
-		case <-serveCtx.Done():
-			return nil
+		for {
+			select {
+			case reconnect := <-reconnectCh:
+				return &reconnect
+			case <-serveCtx.Done():
+				return nil
+			}
 		}
-
 	})
 
 	errGroup.Go(func() error {
@@ -363,7 +376,11 @@ func ServeTunnel(
 			logger.WithError(castedErr.cause).Error("Register tunnel error on client side")
 			return err, true
 		case muxerShutdownError:
-			logger.Infof("Muxer shutdown")
+			logger.Info("Muxer shutdown")
+			return err, true
+		case *ReconnectSignal:
+			logger.Warnf("Restarting due to reconnect signal in %d seconds", castedErr.Delay)
+			castedErr.DelayBeforeReconnect()
 			return err, true
 		default:
 			logger.WithError(err).Error("Serve tunnel error")
@@ -505,6 +522,8 @@ func UnregisterTunnel(muxer *h2mux.Muxer, gracePeriod time.Duration, logger *log
 		// RPC stream open error
 		return err
 	}
+	defer tunnelServer.Close()
+
 	// gracePeriod is encoded in int64 using capnproto
 	return tunnelServer.UnregisterTunnel(ctx, gracePeriod.Nanoseconds())
 }
@@ -597,7 +616,7 @@ func (h *TunnelHandler) ServeStream(stream *h2mux.MuxedStream) error {
 
 	req, reqErr := h.createRequest(stream)
 	if reqErr != nil {
-		h.logError(stream, reqErr)
+		h.writeErrorResponse(stream, reqErr)
 		return reqErr
 	}
 
@@ -613,7 +632,7 @@ func (h *TunnelHandler) ServeStream(stream *h2mux.MuxedStream) error {
 		resp, respErr = h.serveHTTP(stream, req)
 	}
 	if respErr != nil {
-		h.logError(stream, respErr)
+		h.writeErrorResponse(stream, respErr)
 		return respErr
 	}
 	h.logResponseOk(resp, cfRay, lbProbe)
@@ -651,6 +670,7 @@ func (h *TunnelHandler) serveWebsocket(stream *h2mux.MuxedStream, req *http.Requ
 	// 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
 }
 
@@ -678,7 +698,9 @@ func (h *TunnelHandler) serveHTTP(stream *h2mux.MuxedStream, req *http.Request)
 	}
 	defer response.Body.Close()
 
-	err = stream.WriteHeaders(h2mux.H1ResponseToH2ResponseHeaders(response))
+	headers := h2mux.H1ResponseToH2ResponseHeaders(response)
+	headers = append(headers, h2mux.CreateResponseMetaHeader(h2mux.ResponseMetaHeaderField, h2mux.ResponseSourceOrigin))
+	err = stream.WriteHeaders(headers)
 	if err != nil {
 		return nil, errors.Wrap(err, "Error writing response header")
 	}
@@ -713,9 +735,12 @@ func (h *TunnelHandler) isEventStream(response *http.Response) bool {
 	return false
 }
 
-func (h *TunnelHandler) logError(stream *h2mux.MuxedStream, err error) {
+func (h *TunnelHandler) writeErrorResponse(stream *h2mux.MuxedStream, err error) {
 	h.logger.WithError(err).Error("HTTP request error")
-	stream.WriteHeaders([]h2mux.Header{{Name: ":status", Value: "502"}})
+	stream.WriteHeaders([]h2mux.Header{
+		{Name: ":status", Value: "502"},
+		h2mux.CreateResponseMetaHeader(h2mux.ResponseMetaHeaderField, h2mux.ResponseSourceCloudflared),
+	})
 	stream.Write([]byte("502 Bad Gateway"))
 	h.metrics.incrementResponses(h.connectionID, "502")
 }

originservice/originservice.go

@@ -17,7 +17,6 @@ import (
 	"github.com/cloudflare/cloudflared/hello"
 	"github.com/cloudflare/cloudflared/log"
 	"github.com/cloudflare/cloudflared/websocket"
-
 	"github.com/pkg/errors"
 )
 
@@ -47,6 +46,8 @@ func NewHTTPService(transport http.RoundTripper, url *url.URL, chunkedEncoding b
 }
 
 func (hc *HTTPService) Proxy(stream *h2mux.MuxedStream, req *http.Request) (*http.Response, error) {
+	const responseSourceOrigin = "origin"
+
 	// Support for WSGI Servers by switching transfer encoding from chunked to gzip/deflate
 	if !hc.chunkedEncoding {
 		req.TransferEncoding = []string{"gzip", "deflate"}
@@ -65,7 +66,9 @@ func (hc *HTTPService) Proxy(stream *h2mux.MuxedStream, req *http.Request) (*htt
 	}
 	defer resp.Body.Close()
 
-	err = stream.WriteHeaders(h1ResponseToH2Response(resp))
+	responseHeaders := h1ResponseToH2Response(resp)
+	responseHeaders = append(responseHeaders, h2mux.CreateResponseMetaHeader(h2mux.ResponseMetaHeaderField, responseSourceOrigin))
+	err = stream.WriteHeaders(responseHeaders)
 	if err != nil {
 		return nil, errors.Wrap(err, "error writing response header to HTTP origin")
 	}
@@ -105,7 +108,7 @@ func NewWebSocketService(tlsConfig *tls.Config, url *url.URL) (OriginService, er
 	}
 	shutdownC := make(chan struct{})
 	go func() {
-		websocket.StartProxyServer(log.CreateLogger(), listener, url.String(), shutdownC)
+		websocket.StartProxyServer(log.CreateLogger(), listener, url.String(), shutdownC, websocket.DefaultStreamHandler)
 	}()
 	return &WebsocketService{
 		tlsConfig: tlsConfig,

socks/auth_handler.go

@@ -0,0 +1,77 @@
+package socks
+
+import (
+	"fmt"
+	"io"
+)
+
+const (
+	// NoAuth means no authentication is used when connecting
+	NoAuth = uint8(0)
+
+	// UserPassAuth means a user/password is used when connecting
+	UserPassAuth = uint8(2)
+
+	noAcceptable    = uint8(255)
+	userAuthVersion = uint8(1)
+	authSuccess     = uint8(0)
+	authFailure     = uint8(1)
+)
+
+// AuthHandler handles socks authenication requests
+type AuthHandler interface {
+	Handle(io.Reader, io.Writer) error
+	Register(uint8, Authenticator)
+}
+
+// StandardAuthHandler loads the default authenticators
+type StandardAuthHandler struct {
+	authenticators map[uint8]Authenticator
+}
+
+// NewAuthHandler creates a default auth handler
+func NewAuthHandler() AuthHandler {
+	defaults := make(map[uint8]Authenticator)
+	defaults[NoAuth] = NewNoAuthAuthenticator()
+	return &StandardAuthHandler{
+		authenticators: defaults,
+	}
+}
+
+// Register adds/replaces an Authenticator to use when handling Authentication requests
+func (h *StandardAuthHandler) Register(method uint8, a Authenticator) {
+	h.authenticators[method] = a
+}
+
+// Handle gets the methods from the SOCKS5 client and authenicates with the first supported method
+func (h *StandardAuthHandler) Handle(bufConn io.Reader, conn io.Writer) error {
+	methods, err := readMethods(bufConn)
+	if err != nil {
+		return fmt.Errorf("Failed to read auth methods: %v", err)
+	}
+
+	// first supported method is used
+	for _, method := range methods {
+		authenticator := h.authenticators[method]
+		if authenticator != nil {
+			return authenticator.Handle(bufConn, conn)
+		}
+	}
+
+	// failed to authenticate. No supported authentication type found
+	conn.Write([]byte{socks5Version, noAcceptable})
+	return fmt.Errorf("unknown authentication type")
+}
+
+// readMethods is used to read the number and type of methods
+func readMethods(r io.Reader) ([]byte, error) {
+	header := []byte{0}
+	if _, err := r.Read(header); err != nil {
+		return nil, err
+	}
+
+	numMethods := int(header[0])
+	methods := make([]byte, numMethods)
+	_, err := io.ReadAtLeast(r, methods, numMethods)
+	return methods, err
+}

socks/authenticator.go

@@ -0,0 +1,87 @@
+package socks
+
+import (
+	"fmt"
+	"io"
+)
+
+// Authenticator is the connection passed in as a reader/writer to support different authentication types
+type Authenticator interface {
+	Handle(io.Reader, io.Writer) error
+}
+
+// NoAuthAuthenticator is used to handle the No Authentication mode
+type NoAuthAuthenticator struct{}
+
+// NewNoAuthAuthenticator creates a authless Authenticator
+func NewNoAuthAuthenticator() Authenticator {
+	return &NoAuthAuthenticator{}
+}
+
+// Handle writes back the version and NoAuth
+func (a *NoAuthAuthenticator) Handle(reader io.Reader, writer io.Writer) error {
+	_, err := writer.Write([]byte{socks5Version, NoAuth})
+	return err
+}
+
+// UserPassAuthAuthenticator is used to handle the user/password mode
+type UserPassAuthAuthenticator struct {
+	IsValid func(string, string) bool
+}
+
+// NewUserPassAuthAuthenticator creates a new username/password validator Authenticator
+func NewUserPassAuthAuthenticator(isValid func(string, string) bool) Authenticator {
+	return &UserPassAuthAuthenticator{
+		IsValid: isValid,
+	}
+}
+
+// Handle writes back the version and NoAuth
+func (a *UserPassAuthAuthenticator) Handle(reader io.Reader, writer io.Writer) error {
+	if _, err := writer.Write([]byte{socks5Version, UserPassAuth}); err != nil {
+		return err
+	}
+
+	// Get the version and username length
+	header := []byte{0, 0}
+	if _, err := io.ReadAtLeast(reader, header, 2); err != nil {
+		return err
+	}
+
+	// Ensure compatibility. Someone call E-harmony
+	if header[0] != userAuthVersion {
+		return fmt.Errorf("Unsupported auth version: %v", header[0])
+	}
+
+	// Get the user name
+	userLen := int(header[1])
+	user := make([]byte, userLen)
+	if _, err := io.ReadAtLeast(reader, user, userLen); err != nil {
+		return err
+	}
+
+	// Get the password length
+	if _, err := reader.Read(header[:1]); err != nil {
+		return err
+	}
+
+	// Get the password
+	passLen := int(header[0])
+	pass := make([]byte, passLen)
+	if _, err := io.ReadAtLeast(reader, pass, passLen); err != nil {
+		return err
+	}
+
+	// Verify the password
+	if a.IsValid(string(user), string(pass)) {
+		_, err := writer.Write([]byte{userAuthVersion, authSuccess})
+		return err
+	}
+
+	// password failed. Write back failure
+	if _, err := writer.Write([]byte{userAuthVersion, authFailure}); err != nil {
+		return err
+	}
+
+	return fmt.Errorf("User authentication failed")
+}

socks/connection_handler.go

@@ -0,0 +1,57 @@
+package socks
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+)
+
+// ConnectionHandler is the Serve method to handle connections
+// from a local TCP listener of the standard library (net.Listener)
+type ConnectionHandler interface {
+	Serve(io.ReadWriter) error
+}
+
+// StandardConnectionHandler is the base implementation of handling SOCKS5 requests
+type StandardConnectionHandler struct {
+	requestHandler RequestHandler
+	authHandler    AuthHandler
+}
+
+// NewConnectionHandler creates a standard SOCKS5 connection handler
+// This process connections from a generic TCP listener from the standard library
+func NewConnectionHandler(requestHandler RequestHandler) ConnectionHandler {
+	return &StandardConnectionHandler{
+		requestHandler: requestHandler,
+		authHandler:    NewAuthHandler(),
+	}
+}
+
+// Serve process new connection created after calling `Accept()` in the standard library
+func (h *StandardConnectionHandler) Serve(c io.ReadWriter) error {
+	bufConn := bufio.NewReader(c)
+
+	// read the version byte
+	version := []byte{0}
+	if _, err := bufConn.Read(version); err != nil {
+		return err
+	}
+
+	// ensure compatibility
+	if version[0] != socks5Version {
+		return fmt.Errorf("Unsupported SOCKS version: %v", version)
+	}
+
+	// handle auth
+	if err := h.authHandler.Handle(bufConn, c); err != nil {
+		return err
+	}
+
+	// process command/request
+	req, err := NewRequest(bufConn)
+	if err != nil {
+		return err
+	}
+
+	return h.requestHandler.Handle(req, c)
+}

socks/connection_handler_test.go

@@ -0,0 +1,88 @@
+package socks
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"golang.org/x/net/proxy"
+)
+
+type successResponse struct {
+	Status string `json:"status"`
+}
+
+func sendSocksRequest(t *testing.T) []byte {
+	dialer, err := proxy.SOCKS5("tcp", "127.0.0.1:8086", nil, proxy.Direct)
+	assert.NoError(t, err)
+
+	httpTransport := &http.Transport{}
+	httpClient := &http.Client{Transport: httpTransport}
+	// set our socks5 as the dialer
+	httpTransport.Dial = dialer.Dial
+
+	req, err := http.NewRequest("GET", "http://127.0.0.1:8085", nil)
+	assert.NoError(t, err)
+
+	resp, err := httpClient.Do(req)
+	assert.NoError(t, err)
+	defer resp.Body.Close()
+
+	b, err := ioutil.ReadAll(resp.Body)
+	assert.NoError(t, err)
+
+	return b
+}
+
+func startTestServer(t *testing.T, httpHandler func(w http.ResponseWriter, r *http.Request)) {
+	// create a socks server
+	requestHandler := NewRequestHandler(NewNetDialer())
+	socksServer := NewConnectionHandler(requestHandler)
+	listener, err := net.Listen("tcp", ":8086")
+	assert.NoError(t, err)
+
+	go func() {
+		defer listener.Close()
+		for {
+			conn, _ := listener.Accept()
+			go socksServer.Serve(conn)
+		}
+	}()
+
+	// create an http server
+	mux := http.NewServeMux()
+	mux.HandleFunc("/", httpHandler)
+
+	// start the servers
+	go http.ListenAndServe(":8085", mux)
+
+}
+
+func respondWithJSON(w http.ResponseWriter, v interface{}, status int) {
+	data, _ := json.Marshal(v)
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	w.Write(data)
+}
+
+func OkJSONResponseHandler(w http.ResponseWriter, r *http.Request) {
+	resp := successResponse{
+		Status: "ok",
+	}
+	respondWithJSON(w, resp, http.StatusOK)
+}
+
+func TestSocksConnection(t *testing.T) {
+	startTestServer(t, OkJSONResponseHandler)
+	b := sendSocksRequest(t)
+	assert.True(t, len(b) > 0, "no data returned!")
+
+	var resp successResponse
+	json.Unmarshal(b, &resp)
+
+	assert.True(t, resp.Status == "ok", "response didn't return ok")
+}

socks/dialer.go

@@ -0,0 +1,57 @@
+package socks
+
+import (
+	"fmt"
+	"io"
+	"net"
+)
+
+// Dialer is used to provided the transport of the proxy
+type Dialer interface {
+	Dial(string) (io.ReadWriteCloser, *AddrSpec, error)
+}
+
+// NetDialer is a standard TCP dialer
+type NetDialer struct {
+}
+
+// NewNetDialer creates a new dialer
+func NewNetDialer() Dialer {
+	return &NetDialer{}
+}
+
+// Dial is a base TCP dialer
+func (d *NetDialer) Dial(address string) (io.ReadWriteCloser, *AddrSpec, error) {
+	c, err := net.Dial("tcp", address)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	local := c.LocalAddr().(*net.TCPAddr)
+	addr := AddrSpec{IP: local.IP, Port: local.Port}
+
+	return c, &addr, nil
+}
+
+// ConnDialer is like NetDialer but with an existing TCP dialer already created
+type ConnDialer struct {
+	conn net.Conn
+}
+
+// NewConnDialer creates a new dialer with a already created net.conn (TCP expected)
+func NewConnDialer(conn net.Conn) Dialer {
+	return &ConnDialer{
+		conn: conn,
+	}
+}
+
+// Dial is a TCP dialer but already created
+func (d *ConnDialer) Dial(address string) (io.ReadWriteCloser, *AddrSpec, error) {
+	local, ok := d.conn.LocalAddr().(*net.TCPAddr)
+	if !ok {
+		return nil, nil, fmt.Errorf("not a tcp connection")
+	}
+
+	addr := AddrSpec{IP: local.IP, Port: local.Port}
+	return d.conn, &addr, nil
+}

socks/request.go

@@ -0,0 +1,195 @@
+package socks
+
+import (
+	"fmt"
+	"io"
+	"net"
+	"strconv"
+)
+
+const (
+	// version
+	socks5Version = uint8(5)
+
+	// commands https://tools.ietf.org/html/rfc1928#section-4
+	connectCommand   = uint8(1)
+	bindCommand      = uint8(2)
+	associateCommand = uint8(3)
+
+	// address types
+	ipv4Address = uint8(1)
+	fqdnAddress = uint8(3)
+	ipv6Address = uint8(4)
+)
+
+// https://tools.ietf.org/html/rfc1928#section-6
+const (
+	successReply uint8 = iota
+	serverFailure
+	ruleFailure
+	networkUnreachable
+	hostUnreachable
+	connectionRefused
+	ttlExpired
+	commandNotSupported
+	addrTypeNotSupported
+)
+
+// AddrSpec is used to return the target IPv4, IPv6, or a FQDN
+type AddrSpec struct {
+	FQDN string
+	IP   net.IP
+	Port int
+}
+
+// String gives a host version of the Address
+func (a *AddrSpec) String() string {
+	if a.FQDN != "" {
+		return fmt.Sprintf("%s (%s):%d", a.FQDN, a.IP, a.Port)
+	}
+	return fmt.Sprintf("%s:%d", a.IP, a.Port)
+}
+
+// Address returns a string suitable to dial; prefer returning IP-based
+// address, fallback to FQDN
+func (a AddrSpec) Address() string {
+	if len(a.IP) != 0 {
+		return net.JoinHostPort(a.IP.String(), strconv.Itoa(a.Port))
+	}
+	return net.JoinHostPort(a.FQDN, strconv.Itoa(a.Port))
+}
+
+// Request is a SOCKS5 command with supporting field of the connection
+type Request struct {
+	// Protocol version
+	Version uint8
+	// Requested command
+	Command uint8
+	// AddrSpec of the destination
+	DestAddr *AddrSpec
+	// reading from the connection
+	bufConn io.Reader
+}
+
+// NewRequest creates a new request from the connection data stream
+func NewRequest(bufConn io.Reader) (*Request, error) {
+	// Read the version byte
+	header := []byte{0, 0, 0}
+	if _, err := io.ReadAtLeast(bufConn, header, 3); err != nil {
+		return nil, fmt.Errorf("Failed to get command version: %v", err)
+	}
+
+	// ensure compatibility
+	if header[0] != socks5Version {
+		return nil, fmt.Errorf("Unsupported command version: %v", header[0])
+	}
+
+	// Read in the destination address
+	dest, err := readAddrSpec(bufConn)
+	if err != nil {
+		return nil, err
+	}
+
+	return &Request{
+		Version:  socks5Version,
+		Command:  header[1],
+		DestAddr: dest,
+		bufConn:  bufConn,
+	}, nil
+}
+
+func sendReply(w io.Writer, resp uint8, addr *AddrSpec) error {
+	var addrType uint8
+	var addrBody []byte
+	var addrPort uint16
+	switch {
+	case addr == nil:
+		addrType = ipv4Address
+		addrBody = []byte{0, 0, 0, 0}
+		addrPort = 0
+
+	case addr.FQDN != "":
+		addrType = fqdnAddress
+		addrBody = append([]byte{byte(len(addr.FQDN))}, addr.FQDN...)
+		addrPort = uint16(addr.Port)
+
+	case addr.IP.To4() != nil:
+		addrType = ipv4Address
+		addrBody = []byte(addr.IP.To4())
+		addrPort = uint16(addr.Port)
+
+	case addr.IP.To16() != nil:
+		addrType = ipv6Address
+		addrBody = []byte(addr.IP.To16())
+		addrPort = uint16(addr.Port)
+
+	default:
+		return fmt.Errorf("Failed to format address: %v", addr)
+	}
+
+	// Format the message
+	msg := make([]byte, 6+len(addrBody))
+	msg[0] = socks5Version
+	msg[1] = resp
+	msg[2] = 0 // Reserved
+	msg[3] = addrType
+	copy(msg[4:], addrBody)
+	msg[4+len(addrBody)] = byte(addrPort >> 8)
+	msg[4+len(addrBody)+1] = byte(addrPort & 0xff)
+
+	// Send the message
+	_, err := w.Write(msg)
+	return err
+}
+
+// readAddrSpec is used to read AddrSpec.
+// Expects an address type byte, followed by the address and port
+func readAddrSpec(r io.Reader) (*AddrSpec, error) {
+	d := &AddrSpec{}
+
+	// Get the address type
+	addrType := []byte{0}
+	if _, err := r.Read(addrType); err != nil {
+		return nil, err
+	}
+
+	// Handle on a per type basis
+	switch addrType[0] {
+	case ipv4Address:
+		addr := make([]byte, 4)
+		if _, err := io.ReadAtLeast(r, addr, len(addr)); err != nil {
+			return nil, err
+		}
+		d.IP = net.IP(addr)
+
+	case ipv6Address:
+		addr := make([]byte, 16)
+		if _, err := io.ReadAtLeast(r, addr, len(addr)); err != nil {
+			return nil, err
+		}
+		d.IP = net.IP(addr)
+
+	case fqdnAddress:
+		if _, err := r.Read(addrType); err != nil {
+			return nil, err
+		}
+		addrLen := int(addrType[0])
+		fqdn := make([]byte, addrLen)
+		if _, err := io.ReadAtLeast(r, fqdn, addrLen); err != nil {
+			return nil, err
+		}
+		d.FQDN = string(fqdn)
+
+	default:
+		return nil, fmt.Errorf("Unrecognized address type")
+	}
+
+	// Read the port
+	port := []byte{0, 0}
+	if _, err := io.ReadAtLeast(r, port, 2); err != nil {
+		return nil, err
+	}
+	d.Port = (int(port[0]) << 8) | int(port[1])
+
+	return d, nil
+}

socks/request_handler.go

@@ -0,0 +1,106 @@
+package socks
+
+import (
+	"fmt"
+	"io"
+	"strings"
+)
+
+// RequestHandler is the functions needed to handle a SOCKS5 command
+type RequestHandler interface {
+	Handle(*Request, io.ReadWriter) error
+}
+
+// StandardRequestHandler implements the base socks5 command processing
+type StandardRequestHandler struct {
+	dialer Dialer
+}
+
+// NewRequestHandler creates a standard SOCKS5 request handler
+// This handles the SOCKS5 commands and proxies them to their destination
+func NewRequestHandler(dialer Dialer) RequestHandler {
+	return &StandardRequestHandler{
+		dialer: dialer,
+	}
+}
+
+// Handle processes and responds to socks5 commands
+func (h *StandardRequestHandler) Handle(req *Request, conn io.ReadWriter) error {
+	switch req.Command {
+	case connectCommand:
+		return h.handleConnect(conn, req)
+	case bindCommand:
+		return h.handleBind(conn, req)
+	case associateCommand:
+		return h.handleAssociate(conn, req)
+	default:
+		if err := sendReply(conn, commandNotSupported, nil); err != nil {
+			return fmt.Errorf("Failed to send reply: %v", err)
+		}
+		return fmt.Errorf("Unsupported command: %v", req.Command)
+	}
+}
+
+// handleConnect is used to handle a connect command
+func (h *StandardRequestHandler) handleConnect(conn io.ReadWriter, req *Request) error {
+	target, localAddr, err := h.dialer.Dial(req.DestAddr.Address())
+	if err != nil {
+		msg := err.Error()
+		resp := hostUnreachable
+		if strings.Contains(msg, "refused") {
+			resp = connectionRefused
+		} else if strings.Contains(msg, "network is unreachable") {
+			resp = networkUnreachable
+		}
+		if err := sendReply(conn, resp, nil); err != nil {
+			return fmt.Errorf("Failed to send reply: %v", err)
+		}
+		return fmt.Errorf("Connect to %v failed: %v", req.DestAddr, err)
+	}
+	defer target.Close()
+
+	// Send success
+	if err := sendReply(conn, successReply, localAddr); err != nil {
+		return fmt.Errorf("Failed to send reply: %v", err)
+	}
+
+	// Start proxying
+	proxyDone := make(chan error, 2)
+
+	go func() {
+		_, e := io.Copy(target, req.bufConn)
+		proxyDone <- e
+	}()
+
+	go func() {
+		_, e := io.Copy(conn, target)
+		proxyDone <- e
+	}()
+
+	// Wait for both
+	for i := 0; i < 2; i++ {
+		e := <-proxyDone
+		if e != nil {
+			return e
+		}
+	}
+	return nil
+}
+
+// handleBind is used to handle a bind command
+// TODO: Support bind command
+func (h *StandardRequestHandler) handleBind(conn io.ReadWriter, req *Request) error {
+	if err := sendReply(conn, commandNotSupported, nil); err != nil {
+		return fmt.Errorf("Failed to send reply: %v", err)
+	}
+	return nil
+}
+
+// handleAssociate is used to handle a connect command
+// TODO: Support associate command
+func (h *StandardRequestHandler) handleAssociate(conn io.ReadWriter, req *Request) error {
+	if err := sendReply(conn, commandNotSupported, nil); err != nil {
+		return fmt.Errorf("Failed to send reply: %v", err)
+	}
+	return nil
+}

socks/request_handler_test.go

@@ -0,0 +1,28 @@
+package socks
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestUnsupportedBind(t *testing.T) {
+	req := createRequest(t, socks5Version, bindCommand, "2001:db8::68", 1337, false)
+	var b bytes.Buffer
+
+	requestHandler := NewRequestHandler(NewNetDialer())
+	err := requestHandler.Handle(req, &b)
+	assert.NoError(t, err)
+	assert.True(t, b.Bytes()[1] == commandNotSupported, "expected a response")
+}
+
+func TestUnsupportedAssociate(t *testing.T) {
+	req := createRequest(t, socks5Version, associateCommand, "127.0.0.1", 1337, false)
+	var b bytes.Buffer
+
+	requestHandler := NewRequestHandler(NewNetDialer())
+	err := requestHandler.Handle(req, &b)
+	assert.NoError(t, err)
+	assert.True(t, b.Bytes()[1] == commandNotSupported, "expected a response")
+}

socks/request_test.go

@@ -0,0 +1,69 @@
+package socks
+
+import (
+	"bytes"
+	"encoding/binary"
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func createRequestData(version, command uint8, ip net.IP, port uint16) []byte {
+	// set the command
+	b := []byte{version, command, 0}
+
+	// append the ip
+	if len(ip) == net.IPv4len {
+		b = append(b, 1)
+		b = append(b, ip.To4()...)
+	} else {
+		b = append(b, 4)
+		b = append(b, ip.To16()...)
+	}
+
+	// append the port
+	p := []byte{0, 0}
+	binary.BigEndian.PutUint16(p, port)
+	b = append(b, p...)
+
+	return b
+}
+
+func createRequest(t *testing.T, version, command uint8, ipStr string, port uint16, shouldFail bool) *Request {
+	ip := net.ParseIP(ipStr)
+	data := createRequestData(version, command, ip, port)
+	reader := bytes.NewReader(data)
+	req, err := NewRequest(reader)
+	if shouldFail {
+		assert.Error(t, err)
+		return nil
+	}
+	assert.NoError(t, err)
+	assert.True(t, req.Version == socks5Version, "version doesn't match expectation: %v", req.Version)
+	assert.True(t, req.Command == command, "command doesn't match expectation: %v", req.Command)
+	assert.True(t, req.DestAddr.Port == int(port), "port doesn't match expectation: %v", req.DestAddr.Port)
+	assert.True(t, req.DestAddr.IP.String() == ipStr, "ip doesn't match expectation: %v", req.DestAddr.IP.String())
+
+	return req
+}
+
+func TestValidConnectRequest(t *testing.T) {
+	createRequest(t, socks5Version, connectCommand, "127.0.0.1", 1337, false)
+}
+
+func TestValidBindRequest(t *testing.T) {
+	createRequest(t, socks5Version, bindCommand, "2001:db8::68", 1337, false)
+}
+
+func TestValidAssociateRequest(t *testing.T) {
+	createRequest(t, socks5Version, associateCommand, "127.0.0.1", 1234, false)
+}
+
+func TestInValidVersionRequest(t *testing.T) {
+	createRequest(t, 4, connectCommand, "127.0.0.1", 1337, true)
+}
+
+func TestInValidIPRequest(t *testing.T) {
+	createRequest(t, 4, connectCommand, "127.0.01", 1337, true)
+}

sshlog/logger_test.go

@@ -32,7 +32,7 @@ func createLogger(t *testing.T) *Logger {
 //	}()
 //
 //	logger.Write([]byte(testStr))
-//	time.Sleep(2 * time.Millisecond)
+//	time.DelayBeforeReconnect(2 * time.Millisecond)
 //	data, err := ioutil.ReadFile(logFileName)
 //	if err != nil {
 //		t.Fatal("couldn't read the log file!", err)

streamhandler/stream_handler.go

@@ -180,11 +180,12 @@ func (s *StreamHandler) requestLogger(req *http.Request, tunnelHostname h2mux.Tu
 }
 
 func (s *StreamHandler) writeErrorStatus(stream *h2mux.MuxedStream, status *httpErrorStatus) {
-	stream.WriteHeaders([]h2mux.Header{
+	_ = stream.WriteHeaders([]h2mux.Header{
 		{
 			Name:  statusPseudoHeader,
 			Value: status.status,
 		},
+		h2mux.CreateResponseMetaHeader(h2mux.ResponseMetaHeaderField, h2mux.ResponseSourceCloudflared),
 	})
-	stream.Write(status.text)
+	_, _ = stream.Write(status.text)
 }

tunneldns/https_upstream.go

@@ -6,6 +6,7 @@ import (
 	"crypto/tls"
 	"fmt"
 	"io/ioutil"
+	"net"
 	"net/http"
 	"net/url"
 	"time"
@@ -22,33 +23,18 @@ const (
 
 // UpstreamHTTPS is the upstream implementation for DNS over HTTPS service
 type UpstreamHTTPS struct {
-	client   *http.Client
-	endpoint *url.URL
+	client     *http.Client
+	endpoint   *url.URL
+	bootstraps []string
 }
 
-// NewUpstreamHTTPS creates a new DNS over HTTPS upstream from hostname
-func NewUpstreamHTTPS(endpoint string) (Upstream, error) {
+// NewUpstreamHTTPS creates a new DNS over HTTPS upstream from endpoint
+func NewUpstreamHTTPS(endpoint string, bootstraps []string) (Upstream, error) {
 	u, err := url.Parse(endpoint)
 	if err != nil {
 		return nil, err
 	}
-
-	// Update TLS and HTTP client configuration
-	tls := &tls.Config{ServerName: u.Hostname()}
-	transport := &http.Transport{
-		TLSClientConfig:    tls,
-		DisableCompression: true,
-		MaxIdleConns:       1,
-		Proxy:              http.ProxyFromEnvironment,
-	}
-	http2.ConfigureTransport(transport)
-
-	client := &http.Client{
-		Timeout:   defaultTimeout,
-		Transport: transport,
-	}
-
-	return &UpstreamHTTPS{client: client, endpoint: u}, nil
+	return &UpstreamHTTPS{client: configureClient(u.Hostname()), endpoint: u, bootstraps: bootstraps}, nil
 }
 
 // Exchange provides an implementation for the Upstream interface
@@ -58,34 +44,55 @@ func (u *UpstreamHTTPS) Exchange(ctx context.Context, query *dns.Msg) (*dns.Msg,
 		return nil, errors.Wrap(err, "failed to pack DNS query")
 	}
 
+	if len(query.Question) > 0 && query.Question[0].Name == fmt.Sprintf("%s.", u.endpoint.Hostname()) {
+		for _, bootstrap := range u.bootstraps {
+			endpoint, client, err := configureBootstrap(bootstrap)
+			if err != nil {
+				log.WithError(err).Errorf("failed to configure boostrap upstream %s", bootstrap)
+				continue
+			}
+			msg, err := exchange(queryBuf, query.Id, endpoint, client)
+			if err != nil {
+				log.WithError(err).Errorf("failed to connect to a boostrap upstream %s", bootstrap)
+				continue
+			}
+			return msg, nil
+		}
+		return nil, fmt.Errorf("failed to reach any bootstrap upstream: %v", u.bootstraps)
+	}
+
+	return exchange(queryBuf, query.Id, u.endpoint, u.client)
+}
+
+func exchange(msg []byte, queryID uint16, endpoint *url.URL, client *http.Client) (*dns.Msg, error) {
 	// No content negotiation for now, use DNS wire format
-	buf, backendErr := u.exchangeWireformat(queryBuf)
+	buf, backendErr := exchangeWireformat(msg, endpoint, client)
 	if backendErr == nil {
 		response := &dns.Msg{}
 		if err := response.Unpack(buf); err != nil {
 			return nil, errors.Wrap(err, "failed to unpack DNS response from body")
 		}
 
-		response.Id = query.Id
+		response.Id = queryID
 		return response, nil
 	}
 
-	log.WithError(backendErr).Errorf("failed to connect to an HTTPS backend %q", u.endpoint)
+	log.WithError(backendErr).Errorf("failed to connect to an HTTPS backend %q", endpoint)
 	return nil, backendErr
 }
 
 // Perform message exchange with the default UDP wireformat defined in current draft
 // https://datatracker.ietf.org/doc/draft-ietf-doh-dns-over-https
-func (u *UpstreamHTTPS) exchangeWireformat(msg []byte) ([]byte, error) {
-	req, err := http.NewRequest("POST", u.endpoint.String(), bytes.NewBuffer(msg))
+func exchangeWireformat(msg []byte, endpoint *url.URL, client *http.Client) ([]byte, error) {
+	req, err := http.NewRequest("POST", endpoint.String(), bytes.NewBuffer(msg))
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to create an HTTPS request")
 	}
 
 	req.Header.Add("Content-Type", "application/dns-message")
-	req.Host = u.endpoint.Host
+	req.Host = endpoint.Host
 
-	resp, err := u.client.Do(req)
+	resp, err := client.Do(req)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to perform an HTTPS request")
 	}
@@ -104,3 +111,33 @@ func (u *UpstreamHTTPS) exchangeWireformat(msg []byte) ([]byte, error) {
 
 	return buf, nil
 }
+
+func configureBootstrap(bootstrap string) (*url.URL, *http.Client, error) {
+	b, err := url.Parse(bootstrap)
+	if err != nil {
+		return nil, nil, err
+	}
+	if ip := net.ParseIP(b.Hostname()); ip == nil {
+		return nil, nil, fmt.Errorf("bootstrap address of %s must be an IP address", b.Hostname())
+	}
+
+	return b, configureClient(b.Hostname()), nil
+}
+
+// configureClient will configure a HTTPS client for upstream DoH requests
+func configureClient(hostname string) *http.Client {
+	// Update TLS and HTTP client configuration
+	tls := &tls.Config{ServerName: hostname}
+	transport := &http.Transport{
+		TLSClientConfig:    tls,
+		DisableCompression: true,
+		MaxIdleConns:       1,
+		Proxy:              http.ProxyFromEnvironment,
+	}
+	http2.ConfigureTransport(transport)
+
+	return &http.Client{
+		Timeout:   defaultTimeout,
+		Transport: transport,
+	}
+}

tunneldns/tunnel.go

@@ -35,7 +35,7 @@ func Run(c *cli.Context) error {
 
 	go metrics.ServeMetrics(metricsListener, nil, logger)
 
-	listener, err := CreateListener(c.String("address"), uint16(c.Uint("port")), c.StringSlice("upstream"))
+	listener, err := CreateListener(c.String("address"), uint16(c.Uint("port")), c.StringSlice("upstream"), c.StringSlice("bootstrap"))
 	if err != nil {
 		logger.WithError(err).Errorf("Failed to create the listeners")
 		return err
@@ -117,12 +117,12 @@ func (l *Listener) Stop() error {
 }
 
 // CreateListener configures the server and bound sockets
-func CreateListener(address string, port uint16, upstreams []string) (*Listener, error) {
+func CreateListener(address string, port uint16, upstreams []string, bootstraps []string) (*Listener, error) {
 	// Build the list of upstreams
 	upstreamList := make([]Upstream, 0)
 	for _, url := range upstreams {
 		logger.WithField("url", url).Infof("Adding DNS upstream")
-		upstream, err := NewUpstreamHTTPS(url)
+		upstream, err := NewUpstreamHTTPS(url, bootstraps)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to create HTTPS upstream")
 		}

tunnelrpc/pogs/tunnelrpc.go

@@ -521,6 +521,7 @@ type TunnelServer_PogsClient struct {
 }
 
 func (c TunnelServer_PogsClient) Close() error {
+	c.Client.Close()
 	return c.Conn.Close()
 }
 

vendor/github.com/certifi/gocertifi/.travis.yml

@@ -0,0 +1,13 @@
+---
+language: go
+go:
+- tip
+- 1.12.x
+- 1.11.x
+- 1.10.x
+- 1.9.x
+- 1.8.x
+sudo: false
+
+# Forks will use that path for checkout
+go_import_path: github.com/certifi/gocertifi

vendor/github.com/certifi/gocertifi/LICENSE

@@ -1,3 +1,373 @@
-This Source Code Form is subject to the terms of the Mozilla Public License,
-v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain
-one at http://mozilla.org/MPL/2.0/.
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in 
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.

vendor/github.com/certifi/gocertifi/README.md

@@ -9,14 +9,14 @@ This is the same CA bundle that ships with the
 Golang specific port of [certifi](https://github.com/kennethreitz/certifi). The
 CA bundle is derived from Mozilla's canonical set.
 
-## Usage
+## Usage
 
 You can use the `gocertifi` package as follows:
 
 ```go
 import "github.com/certifi/gocertifi"
 
-cert_pool, err := gocertifi.CACerts()
+certPool, err := gocertifi.CACerts()
 ```
 
 You can use the returned `*x509.CertPool` as part of an HTTP transport, for example:
@@ -29,8 +29,22 @@ import (
 
 // Setup an HTTP client with a custom transport
 transport := &http.Transport{
-	TLSClientConfig: &tls.Config{RootCAs: cert_pool},
+  Proxy: ProxyFromEnvironment,
+  DialContext: (&net.Dialer{
+    Timeout:   30 * time.Second,
+    KeepAlive: 30 * time.Second,
+    DualStack: true,
+  }).DialContext,
+  ForceAttemptHTTP2:     true,
+  MaxIdleConns:          100,
+  IdleConnTimeout:       90 * time.Second,
+  TLSHandshakeTimeout:   10 * time.Second,
+  ExpectContinueTimeout: 1 * time.Second,
 }
+// or, starting with go1.13 simply use:
+// transport := http.DefaultTransport.(*http.Transport).Clone()
+
+transport.TLSClientConfig = &tls.Config{RootCAs: certPool}
 client := &http.Client{Transport: transport}
 
 // Make an HTTP request using our custom transport

vendor/github.com/certifi/gocertifi/certifi.go

@@ -1,9 +1,12 @@
+// Code generated by go generate; DO NOT EDIT.
+// 2020-02-11 10:00:50.717122 -0800 PST m=+0.664468880
+// https://mkcert.org/generate/
+
 package gocertifi
 
-import (
-	"crypto/x509"
-	"errors"
-)
+//go:generate go run gen.go "https://mkcert.org/generate/"
+
+import "crypto/x509"
 
 const pemcerts string = `
 
@@ -334,36 +337,6 @@ OCiNUW7dFGdTbHFcJoRNdVq2fmBWqU2t+5sel/MN2dKXVHfaPRK34B7vCAas+YWH
 QMAJKOSLakhT2+zNVVXxxvjpoixMptEmX36vWkzaH6byHCx+rgIW0lbQL1dTR+iS
 -----END CERTIFICATE-----
 
-# Issuer: CN=Visa eCommerce Root O=VISA OU=Visa International Service Association
-# Subject: CN=Visa eCommerce Root O=VISA OU=Visa International Service Association
-# Label: "Visa eCommerce Root"
-# Serial: 25952180776285836048024890241505565794
-# MD5 Fingerprint: fc:11:b8:d8:08:93:30:00:6d:23:f9:7e:eb:52:1e:02
-# SHA1 Fingerprint: 70:17:9b:86:8c:00:a4:fa:60:91:52:22:3f:9f:3e:32:bd:e0:05:62
-# SHA256 Fingerprint: 69:fa:c9:bd:55:fb:0a:c7:8d:53:bb:ee:5c:f1:d5:97:98:9f:d0:aa:ab:20:a2:51:51:bd:f1:73:3e:e7:d1:22
------BEGIN CERTIFICATE-----
-MIIDojCCAoqgAwIBAgIQE4Y1TR0/BvLB+WUF1ZAcYjANBgkqhkiG9w0BAQUFADBr
-MQswCQYDVQQGEwJVUzENMAsGA1UEChMEVklTQTEvMC0GA1UECxMmVmlzYSBJbnRl
-cm5hdGlvbmFsIFNlcnZpY2UgQXNzb2NpYXRpb24xHDAaBgNVBAMTE1Zpc2EgZUNv
-bW1lcmNlIFJvb3QwHhcNMDIwNjI2MDIxODM2WhcNMjIwNjI0MDAxNjEyWjBrMQsw
-CQYDVQQGEwJVUzENMAsGA1UEChMEVklTQTEvMC0GA1UECxMmVmlzYSBJbnRlcm5h
-dGlvbmFsIFNlcnZpY2UgQXNzb2NpYXRpb24xHDAaBgNVBAMTE1Zpc2EgZUNvbW1l
-cmNlIFJvb3QwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCvV95WHm6h
-2mCxlCfLF9sHP4CFT8icttD0b0/Pmdjh28JIXDqsOTPHH2qLJj0rNfVIsZHBAk4E
-lpF7sDPwsRROEW+1QK8bRaVK7362rPKgH1g/EkZgPI2h4H3PVz4zHvtH8aoVlwdV
-ZqW1LS7YgFmypw23RuwhY/81q6UCzyr0TP579ZRdhE2o8mCP2w4lPJ9zcc+U30rq
-299yOIzzlr3xF7zSujtFWsan9sYXiwGd/BmoKoMWuDpI/k4+oKsGGelT84ATB+0t
-vz8KPFUgOSwsAGl0lUq8ILKpeeUYiZGo3BxN77t+Nwtd/jmliFKMAGzsGHxBvfaL
-dXe6YJ2E5/4tAgMBAAGjQjBAMA8GA1UdEwEB/wQFMAMBAf8wDgYDVR0PAQH/BAQD
-AgEGMB0GA1UdDgQWBBQVOIMPPyw/cDMezUb+B4wg4NfDtzANBgkqhkiG9w0BAQUF
-AAOCAQEAX/FBfXxcCLkr4NWSR/pnXKUTwwMhmytMiUbPWU3J/qVAtmPN3XEolWcR
-zCSs00Rsca4BIGsDoo8Ytyk6feUWYFN4PMCvFYP3j1IzJL1kk5fui/fbGKhtcbP3
-LBfQdCVp9/5rPJS+TUtBjE7ic9DjkCJzQ83z7+pzzkWKsKZJ/0x9nXGIxHYdkFsd
-7v3M9+79YKWxehZx0RbQfBI8bGmX265fOZpwLwU8GUYEmSA20GBuYQa7FkKMcPcw
-++DbZqMAAb3mLNqRX6BGi01qnD093QVG/na/oAo85ADmJ7f/hC3euiInlhBx6yLt
-398znM/jra6O1I7mT1GvFpLgXPYHDw==
------END CERTIFICATE-----
-
 # Issuer: CN=AAA Certificate Services O=Comodo CA Limited
 # Subject: CN=AAA Certificate Services O=Comodo CA Limited
 # Label: "Comodo AAA Services root"
@@ -809,36 +782,6 @@ vEsXCS+0yx5DaMkHJ8HSXPfqIbloEpw8nL+e/IBcm2PN7EeqJSdnoDfzAIJ9VNep
 +OkuE6N36B9K
 -----END CERTIFICATE-----
 
-# Issuer: CN=Class 2 Primary CA O=Certplus
-# Subject: CN=Class 2 Primary CA O=Certplus
-# Label: "Certplus Class 2 Primary CA"
-# Serial: 177770208045934040241468760488327595043
-# MD5 Fingerprint: 88:2c:8c:52:b8:a2:3c:f3:f7:bb:03:ea:ae:ac:42:0b
-# SHA1 Fingerprint: 74:20:74:41:72:9c:dd:92:ec:79:31:d8:23:10:8d:c2:81:92:e2:bb
-# SHA256 Fingerprint: 0f:99:3c:8a:ef:97:ba:af:56:87:14:0e:d5:9a:d1:82:1b:b4:af:ac:f0:aa:9a:58:b5:d5:7a:33:8a:3a:fb:cb
------BEGIN CERTIFICATE-----
-MIIDkjCCAnqgAwIBAgIRAIW9S/PY2uNp9pTXX8OlRCMwDQYJKoZIhvcNAQEFBQAw
-PTELMAkGA1UEBhMCRlIxETAPBgNVBAoTCENlcnRwbHVzMRswGQYDVQQDExJDbGFz
-cyAyIFByaW1hcnkgQ0EwHhcNOTkwNzA3MTcwNTAwWhcNMTkwNzA2MjM1OTU5WjA9
-MQswCQYDVQQGEwJGUjERMA8GA1UEChMIQ2VydHBsdXMxGzAZBgNVBAMTEkNsYXNz
-IDIgUHJpbWFyeSBDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANxQ
-ltAS+DXSCHh6tlJw/W/uz7kRy1134ezpfgSN1sxvc0NXYKwzCkTsA18cgCSR5aiR
-VhKC9+Ar9NuuYS6JEI1rbLqzAr3VNsVINyPi8Fo3UjMXEuLRYE2+L0ER4/YXJQyL
-kcAbmXuZVg2v7tK8R1fjeUl7NIknJITesezpWE7+Tt9avkGtrAjFGA7v0lPubNCd
-EgETjdyAYveVqUSISnFOYFWe2yMZeVYHDD9jC1yw4r5+FfyUM1hBOHTE4Y+L3yas
-H7WLO7dDWWuwJKZtkIvEcupdM5i3y95ee++U8Rs+yskhwcWYAqqi9lt3m/V+llU0
-HGdpwPFC40es/CgcZlUCAwEAAaOBjDCBiTAPBgNVHRMECDAGAQH/AgEKMAsGA1Ud
-DwQEAwIBBjAdBgNVHQ4EFgQU43Mt38sOKAze3bOkynm4jrvoMIkwEQYJYIZIAYb4
-QgEBBAQDAgEGMDcGA1UdHwQwMC4wLKAqoCiGJmh0dHA6Ly93d3cuY2VydHBsdXMu
-Y29tL0NSTC9jbGFzczIuY3JsMA0GCSqGSIb3DQEBBQUAA4IBAQCnVM+IRBnL39R/
-AN9WM2K191EBkOvDP9GIROkkXe/nFL0gt5o8AP5tn9uQ3Nf0YtaLcF3n5QRIqWh8
-yfFC82x/xXp8HVGIutIKPidd3i1RTtMTZGnkLuPT55sJmabglZvOGtd/vjzOUrMR
-FcEPF80Du5wlFbqidon8BvEY0JNLDnyCt6X09l/+7UCmnYR0ObncHoUW2ikbhiMA
-ybuJfm6AiB4vFLQDJKgybwOaRywwvlbGp0ICcBvqQNi6BQNwB6SW//1IMwrh3KWB
-kJtN3X3n57LNXMhqlfil9o3EXXgIvnsG1knPGTZQIy4I5p4FTUcY1Rbpsda2ENW7
-l7+ijrRU
------END CERTIFICATE-----
-
 # Issuer: CN=DST Root CA X3 O=Digital Signature Trust Co.
 # Subject: CN=DST Root CA X3 O=Digital Signature Trust Co.
 # Label: "DST Root CA X3"
@@ -1257,36 +1200,6 @@ t0QmwCbAr1UwnjvVNioZBPRcHv/PLLf/0P2HQBHVESO7SMAhqaQoLf0V+LBOK/Qw
 WyH8EZE0vkHve52Xdf+XlcCWWC/qu0bXu+TZLg==
 -----END CERTIFICATE-----
 
-# Issuer: CN=Deutsche Telekom Root CA 2 O=Deutsche Telekom AG OU=T-TeleSec Trust Center
-# Subject: CN=Deutsche Telekom Root CA 2 O=Deutsche Telekom AG OU=T-TeleSec Trust Center
-# Label: "Deutsche Telekom Root CA 2"
-# Serial: 38
-# MD5 Fingerprint: 74:01:4a:91:b1:08:c4:58:ce:47:cd:f0:dd:11:53:08
-# SHA1 Fingerprint: 85:a4:08:c0:9c:19:3e:5d:51:58:7d:cd:d6:13:30:fd:8c:de:37:bf
-# SHA256 Fingerprint: b6:19:1a:50:d0:c3:97:7f:7d:a9:9b:cd:aa:c8:6a:22:7d:ae:b9:67:9e:c7:0b:a3:b0:c9:d9:22:71:c1:70:d3
------BEGIN CERTIFICATE-----
-MIIDnzCCAoegAwIBAgIBJjANBgkqhkiG9w0BAQUFADBxMQswCQYDVQQGEwJERTEc
-MBoGA1UEChMTRGV1dHNjaGUgVGVsZWtvbSBBRzEfMB0GA1UECxMWVC1UZWxlU2Vj
-IFRydXN0IENlbnRlcjEjMCEGA1UEAxMaRGV1dHNjaGUgVGVsZWtvbSBSb290IENB
-IDIwHhcNOTkwNzA5MTIxMTAwWhcNMTkwNzA5MjM1OTAwWjBxMQswCQYDVQQGEwJE
-RTEcMBoGA1UEChMTRGV1dHNjaGUgVGVsZWtvbSBBRzEfMB0GA1UECxMWVC1UZWxl
-U2VjIFRydXN0IENlbnRlcjEjMCEGA1UEAxMaRGV1dHNjaGUgVGVsZWtvbSBSb290
-IENBIDIwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCrC6M14IspFLEU
-ha88EOQ5bzVdSq7d6mGNlUn0b2SjGmBmpKlAIoTZ1KXleJMOaAGtuU1cOs7TuKhC
-QN/Po7qCWWqSG6wcmtoIKyUn+WkjR/Hg6yx6m/UTAtB+NHzCnjwAWav12gz1Mjwr
-rFDa1sPeg5TKqAyZMg4ISFZbavva4VhYAUlfckE8FQYBjl2tqriTtM2e66foai1S
-NNs671x1Udrb8zH57nGYMsRUFUQM+ZtV7a3fGAigo4aKSe5TBY8ZTNXeWHmb0moc
-QqvF1afPaA+W5OFhmHZhyJF81j4A4pFQh+GdCuatl9Idxjp9y7zaAzTVjlsB9WoH
-txa2bkp/AgMBAAGjQjBAMB0GA1UdDgQWBBQxw3kbuvVT1xfgiXotF2wKsyudMzAP
-BgNVHRMECDAGAQH/AgEFMA4GA1UdDwEB/wQEAwIBBjANBgkqhkiG9w0BAQUFAAOC
-AQEAlGRZrTlk5ynrE/5aw4sTV8gEJPB0d8Bg42f76Ymmg7+Wgnxu1MM9756Abrsp
-tJh6sTtU6zkXR34ajgv8HzFZMQSyzhfzLMdiNlXiItiJVbSYSKpk+tYcNthEeFpa
-IzpXl/V6ME+un2pMSyuOoAPjPuCp1NJ70rOo4nI8rZ7/gFnkm0W09juwzTkZmDLl
-6iFhkOQxIY40sfcvNUqFENrnijchvllj4PKFiDFT1FQUhXB59C4Gdyd1Lx+4ivn+
-xbrYNuSD7Odlt79jWvNGr4GUN9RBjNYj1h7P9WgbRGOiWrqnNVmh5XAFmw4jV5mU
-Cm26OWMohpLzGITY+9HPBVZkVw==
------END CERTIFICATE-----
-
 # Issuer: CN=Cybertrust Global Root O=Cybertrust, Inc
 # Subject: CN=Cybertrust Global Root O=Cybertrust, Inc
 # Label: "Cybertrust Global Root"
@@ -2238,6 +2151,45 @@ t/2jioSgrGK+KwmHNPBqAbubKVY8/gA3zyNs8U6qtnRGEmyR7jTV7JqR50S+kDFy
 SjnRBUkLp7Y3gaVdjKozXoEofKd9J+sAro03
 -----END CERTIFICATE-----
 
+# Issuer: CN=EC-ACC O=Agencia Catalana de Certificacio (NIF Q-0801176-I) OU=Serveis Publics de Certificacio/Vegeu https://www.catcert.net/verarrel (c)03/Jerarquia Entitats de Certificacio Catalanes
+# Subject: CN=EC-ACC O=Agencia Catalana de Certificacio (NIF Q-0801176-I) OU=Serveis Publics de Certificacio/Vegeu https://www.catcert.net/verarrel (c)03/Jerarquia Entitats de Certificacio Catalanes
+# Label: "EC-ACC"
+# Serial: -23701579247955709139626555126524820479
+# MD5 Fingerprint: eb:f5:9d:29:0d:61:f9:42:1f:7c:c2:ba:6d:e3:15:09
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
 # Issuer: CN=Hellenic Academic and Research Institutions RootCA 2011 O=Hellenic Academic and Research Institutions Cert. Authority
 # Subject: CN=Hellenic Academic and Research Institutions RootCA 2011 O=Hellenic Academic and Research Institutions Cert. Authority
 # Label: "Hellenic Academic and Research Institutions RootCA 2011"
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 -----END CERTIFICATE-----
 
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-# Serial: 156233699172481
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Certinomis - Root CA O=Certinomis OU=0002 433998903
-# Subject: CN=Certinomis - Root CA O=Certinomis OU=0002 433998903
-# Label: "Certinomis - Root CA"
-# Serial: 1
-# MD5 Fingerprint: 14:0a:fd:8d:a8:28:b5:38:69:db:56:7e:61:22:03:3f
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
 # Issuer: CN=OISTE WISeKey Global Root GB CA O=WISeKey OU=OISTE Foundation Endorsed
 # Subject: CN=OISTE WISeKey Global Root GB CA O=WISeKey OU=OISTE Foundation Endorsed
 # Label: "OISTE WISeKey Global Root GB CA"
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 -----END CERTIFICATE-----
 
-# Issuer: CN=Certplus Root CA G1 O=Certplus
-# Subject: CN=Certplus Root CA G1 O=Certplus
-# Label: "Certplus Root CA G1"
-# Serial: 1491911565779898356709731176965615564637713
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=Certplus Root CA G2 O=Certplus
-# Subject: CN=Certplus Root CA G2 O=Certplus
-# Label: "Certplus Root CA G2"
-# Serial: 1492087096131536844209563509228951875861589
-# MD5 Fingerprint: a7:ee:c4:78:2d:1b:ee:2d:b9:29:ce:d6:a7:96:32:31
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------BEGIN CERTIFICATE-----
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------END CERTIFICATE-----
-
-# Issuer: CN=OpenTrust Root CA G1 O=OpenTrust
-# Subject: CN=OpenTrust Root CA G1 O=OpenTrust
-# Label: "OpenTrust Root CA G1"
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-# Issuer: CN=OpenTrust Root CA G2 O=OpenTrust
-# Subject: CN=OpenTrust Root CA G2 O=OpenTrust
-# Label: "OpenTrust Root CA G2"
-# Serial: 1492012448042702096986875987676935573415441
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-# Issuer: CN=OpenTrust Root CA G3 O=OpenTrust
-# Subject: CN=OpenTrust Root CA G3 O=OpenTrust
-# Label: "OpenTrust Root CA G3"
-# Serial: 1492104908271485653071219941864171170455615
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------BEGIN CERTIFICATE-----
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 # Issuer: CN=ISRG Root X1 O=Internet Security Research Group
 # Subject: CN=ISRG Root X1 O=Internet Security Research Group
 # Label: "ISRG Root X1"
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+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
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+# Label: "GlobalSign Root CA - R6"
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GC CA"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GTS Root R1 O=Google Trust Services LLC
+# Subject: CN=GTS Root R1 O=Google Trust Services LLC
+# Label: "GTS Root R1"
+# Serial: 146587175971765017618439757810265552097
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GTS Root R2 O=Google Trust Services LLC
+# Subject: CN=GTS Root R2 O=Google Trust Services LLC
+# Label: "GTS Root R2"
+# Serial: 146587176055767053814479386953112547951
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=GTS Root R3 O=Google Trust Services LLC
+# Subject: CN=GTS Root R3 O=Google Trust Services LLC
+# Label: "GTS Root R3"
+# Serial: 146587176140553309517047991083707763997
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+# Issuer: CN=GTS Root R4 O=Google Trust Services LLC
+# Subject: CN=GTS Root R4 O=Google Trust Services LLC
+# Label: "GTS Root R4"
+# Serial: 146587176229350439916519468929765261721
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=UCA Global G2 Root O=UniTrust
+# Subject: CN=UCA Global G2 Root O=UniTrust
+# Label: "UCA Global G2 Root"
+# Serial: 124779693093741543919145257850076631279
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=UCA Extended Validation Root O=UniTrust
+# Subject: CN=UCA Extended Validation Root O=UniTrust
+# Label: "UCA Extended Validation Root"
+# Serial: 106100277556486529736699587978573607008
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Subject: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Label: "Certigna Root CA"
+# Serial: 269714418870597844693661054334862075617
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign Root CA - G1"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign ECC Root CA - G3"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign Root CA - C1"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign ECC Root CA - C3"
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+# Issuer: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Label: "Hongkong Post Root CA 3"
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - G4"
+# Serial: 289383649854506086828220374796556676440
+# MD5 Fingerprint: 89:53:f1:83:23:b7:7c:8e:05:f1:8c:71:38:4e:1f:88
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+# SHA256 Fingerprint: db:35:17:d1:f6:73:2a:2d:5a:b9:7c:53:3e:c7:07:79:ee:32:70:a6:2f:b4:ac:42:38:37:24:60:e6:f0:1e:88
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
 `
 
-var ErrParseFailed = errors.New("gocertifi: error when parsing certificates")
-
-// CACerts builds an X.509 certificate pool containing the Mozilla CA
-// Certificate bundle. Returns nil on error along with an appropriate error
-// code.
+// CACerts builds an X.509 certificate pool containing the
+// certificate bundle from https://mkcert.org/generate/ fetch on 2020-02-11 10:00:50.717122 -0800 PST m=+0.664468880.
+// Returns nil on error along with an appropriate error code.
 func CACerts() (*x509.CertPool, error) {
 	pool := x509.NewCertPool()
-	ok := pool.AppendCertsFromPEM([]byte(pemcerts))
-	if !ok {
-		return nil, ErrParseFailed
-	}
+	pool.AppendCertsFromPEM([]byte(pemcerts))
 	return pool, nil
 }

vendor/github.com/certifi/gocertifi/go.mod

@@ -0,0 +1,3 @@
+module github.com/certifi/gocertifi
+
+go 1.12

vendor/github.com/certifi/gocertifi/tasks.py

@@ -1,20 +0,0 @@
-from invoke import task
-import requests
-
-@task
-def update(ctx):
-    r = requests.get('https://mkcert.org/generate/')
-    r.raise_for_status()
-    certs = r.content
-
-    with open('certifi.go', 'rb') as f:
-        file = f.read()
-
-    file = file.split('`\n')
-    assert len(file) == 3
-    file[1] = certs
-
-    ctx.run("rm certifi.go")
-
-    with open('certifi.go', 'wb') as f:
-        f.write('`\n'.join(file))

vendor/github.com/cloudflare/cfssl/LICENSE

@@ -0,0 +1,24 @@
+Copyright (c) 2014 CloudFlare Inc.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer.
+
+Redistributions in binary form must reproduce the above copyright notice,
+this list of conditions and the following disclaimer in the documentation
+and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/cloudflare/cfssl/log/log.go

@@ -0,0 +1,98 @@
+// Package log implements a wrapper around the Go standard library's
+// logging package. Clients should set the current log level; only
+// messages below that level will actually be logged. For example, if
+// Level is set to LevelWarning, only log messages at the Warning,
+// Error, and Critical levels will be logged.
+package log
+
+import (
+	"fmt"
+	golog "log"
+)
+
+// The following constants represent logging levels in increasing levels of seriousness.
+const (
+	LevelDebug = iota
+	LevelInfo
+	LevelWarning
+	LevelError
+	LevelCritical
+)
+
+var levelPrefix = [...]string{
+	LevelDebug:    "[DEBUG] ",
+	LevelInfo:     "[INFO] ",
+	LevelWarning:  "[WARNING] ",
+	LevelError:    "[ERROR] ",
+	LevelCritical: "[CRITICAL] ",
+}
+
+// Level stores the current logging level.
+var Level = LevelDebug
+
+func outputf(l int, format string, v []interface{}) {
+	if l >= Level {
+		golog.Printf(fmt.Sprint(levelPrefix[l], format), v...)
+	}
+}
+
+func output(l int, v []interface{}) {
+	if l >= Level {
+		golog.Print(levelPrefix[l], fmt.Sprint(v...))
+	}
+}
+
+// Criticalf logs a formatted message at the "critical" level. The
+// arguments are handled in the same manner as fmt.Printf.
+func Criticalf(format string, v ...interface{}) {
+	outputf(LevelCritical, format, v)
+}
+
+// Critical logs its arguments at the "critical" level.
+func Critical(v ...interface{}) {
+	output(LevelCritical, v)
+}
+
+// Errorf logs a formatted message at the "error" level. The arguments
+// are handled in the same manner as fmt.Printf.
+func Errorf(format string, v ...interface{}) {
+	outputf(LevelError, format, v)
+}
+
+// Error logs its arguments at the "error" level.
+func Error(v ...interface{}) {
+	output(LevelError, v)
+}
+
+// Warningf logs a formatted message at the "warning" level. The
+// arguments are handled in the same manner as fmt.Printf.
+func Warningf(format string, v ...interface{}) {
+	outputf(LevelWarning, format, v)
+}
+
+// Warning logs its arguments at the "warning" level.
+func Warning(v ...interface{}) {
+	output(LevelWarning, v)
+}
+
+// Infof logs a formatted message at the "info" level. The arguments
+// are handled in the same manner as fmt.Printf.
+func Infof(format string, v ...interface{}) {
+	outputf(LevelInfo, format, v)
+}
+
+// Info logs its arguments at the "info" level.
+func Info(v ...interface{}) {
+	output(LevelInfo, v)
+}
+
+// Debugf logs a formatted message at the "debug" level. The arguments
+// are handled in the same manner as fmt.Printf.
+func Debugf(format string, v ...interface{}) {
+	outputf(LevelDebug, format, v)
+}
+
+// Debug logs its arguments at the "debug" level.
+func Debug(v ...interface{}) {
+	output(LevelDebug, v)
+}

vendor/github.com/cloudflare/cfssl/revoke/revoke.go

@@ -0,0 +1,146 @@
+// Package revoke provides functionality for checking the validity of
+// a cert. Specifically, the temporal validity of the certificate is
+// checked first, then any CRL in the cert is checked. OCSP is not
+// supported at this time.
+package revoke
+
+import (
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"errors"
+	"io/ioutil"
+	"net/http"
+	neturl "net/url"
+	"time"
+
+	"github.com/cloudflare/cfssl/log"
+)
+
+// HardFail determines whether the failure to check the revocation
+// status of a certificate (i.e. due to network failure) causes
+// verification to fail (a hard failure).
+var HardFail = false
+
+// TODO (kyle): figure out a good mechanism for OCSP; this requires
+// presenting both the certificate and the issuer, and we don't have a
+// good way at this time of getting the issuer.
+
+// CRLSet associates a PKIX certificate list with the URL the CRL is
+// fetched from.
+var CRLSet = map[string]*pkix.CertificateList{}
+
+// We can't handle LDAP certificates, so this checks to see if the
+// URL string points to an LDAP resource so that we can ignore it.
+func ldapURL(url string) bool {
+	u, err := neturl.Parse(url)
+	if err != nil {
+		log.Warningf("invalid url %s: %v", url, err)
+		return false
+	}
+	if u.Scheme == "ldap" {
+		return true
+	}
+	return false
+}
+
+// revCheck should check the certificate for any revocations. It
+// returns a pair of booleans: the first indicates whether the certificate
+// is revoked, the second indicates whether the revocations were
+// successfully checked.. This leads to the following combinations:
+//
+//	false, false: an error was encountered while checking revocations.
+//
+//	false, true:  the certificate was checked successfully and
+//		      it is not revoked.
+//
+//      true, true:   the certificate was checked successfully and
+//		      it is revoked.
+func revCheck(cert *x509.Certificate) (revoked, ok bool) {
+	for _, url := range cert.CRLDistributionPoints {
+		if ldapURL(url) {
+			log.Infof("skipping LDAP CRL: %s", url)
+			continue
+		}
+
+		if revoked, ok := certIsRevokedCRL(cert, url); !ok {
+			log.Warning("error checking revocation via CRL")
+			if HardFail {
+				return true, false
+			}
+			return false, false
+		} else if revoked {
+			log.Info("certificate is revoked via CRL")
+			return true, true
+		}
+	}
+
+	return false, true
+}
+
+// fetchCRL fetches and parses a CRL.
+func fetchCRL(url string) (*pkix.CertificateList, error) {
+	resp, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	} else if resp.StatusCode >= 300 {
+		return nil, errors.New("failed to retrieve CRL")
+	}
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, err
+	}
+	resp.Body.Close()
+
+	return x509.ParseCRL(body)
+}
+
+// check a cert against a specific CRL. Returns the same bool pair
+// as revCheck.
+func certIsRevokedCRL(cert *x509.Certificate, url string) (revoked, ok bool) {
+	crl, ok := CRLSet[url]
+	if ok && crl == nil {
+		ok = false
+		delete(CRLSet, url)
+	}
+
+	var shouldFetchCRL = true
+	if ok {
+		if !crl.HasExpired(time.Now()) {
+			shouldFetchCRL = false
+		}
+	}
+
+	if shouldFetchCRL {
+		var err error
+		crl, err = fetchCRL(url)
+		if err != nil {
+			log.Warningf("failed to fetch CRL: %v", err)
+			return false, false
+		}
+		CRLSet[url] = crl
+	}
+
+	for _, revoked := range crl.TBSCertList.RevokedCertificates {
+		if cert.SerialNumber.Cmp(revoked.SerialNumber) == 0 {
+			log.Info("Serial number match: intermediate is revoked.")
+			return true, true
+		}
+	}
+
+	return false, true
+}
+
+// VerifyCertificate ensures that the certificate passed in hasn't
+// expired and checks the CRL for the server.
+func VerifyCertificate(cert *x509.Certificate) (revoked, ok bool) {
+	if !time.Now().Before(cert.NotAfter) {
+		log.Infof("Certificate expired %s\n", cert.NotAfter)
+		return true, true
+	} else if !time.Now().After(cert.NotBefore) {
+		log.Infof("Certificate isn't valid until %s\n", cert.NotBefore)
+		return true, true
+	}
+
+	return revCheck(cert)
+}

vendor/github.com/fsnotify/fsnotify/.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*.go]
+indent_style = tab
+indent_size = 4
+insert_final_newline = true
+
+[*.{yml,yaml}]
+indent_style = space
+indent_size = 2
+insert_final_newline = true
+trim_trailing_whitespace = true

vendor/github.com/fsnotify/fsnotify/.gitattributes

@@ -0,0 +1 @@
+go.sum linguist-generated

vendor/github.com/fsnotify/fsnotify/.gitignore

@@ -0,0 +1,6 @@
+# Setup a Global .gitignore for OS and editor generated files:
+# https://help.github.com/articles/ignoring-files
+# git config --global core.excludesfile ~/.gitignore_global
+
+.vagrant
+*.sublime-project

vendor/github.com/fsnotify/fsnotify/.travis.yml

@@ -0,0 +1,36 @@
+sudo: false
+language: go
+
+go:
+  - "stable"
+  - "1.11.x"
+  - "1.10.x"
+  - "1.9.x"
+
+matrix:
+  include:
+    - go: "stable"
+      env: GOLINT=true
+  allow_failures:
+    - go: tip
+  fast_finish: true
+
+
+before_install:
+  - if [ ! -z "${GOLINT}" ]; then go get -u golang.org/x/lint/golint; fi
+
+script:
+  - go test --race ./...
+
+after_script:
+  - test -z "$(gofmt -s -l -w . | tee /dev/stderr)"
+  - if [ ! -z  "${GOLINT}" ]; then echo running golint; golint --set_exit_status  ./...; else echo skipping golint; fi
+  - go vet ./...
+
+os:
+  - linux
+  - osx
+  - windows
+
+notifications:
+  email: false

vendor/github.com/fsnotify/fsnotify/AUTHORS

@@ -0,0 +1,52 @@
+# Names should be added to this file as
+#	Name or Organization <email address>
+# The email address is not required for organizations.
+
+# You can update this list using the following command:
+#
+#   $ git shortlog -se | awk '{print $2 " " $3 " " $4}'
+
+# Please keep the list sorted.
+
+Aaron L <aaron@bettercoder.net>
+Adrien Bustany <adrien@bustany.org>
+Amit Krishnan <amit.krishnan@oracle.com>
+Anmol Sethi <me@anmol.io>
+Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
+Bruno Bigras <bigras.bruno@gmail.com>
+Caleb Spare <cespare@gmail.com>
+Case Nelson <case@teammating.com>
+Chris Howey <chris@howey.me> <howeyc@gmail.com>
+Christoffer Buchholz <christoffer.buchholz@gmail.com>
+Daniel Wagner-Hall <dawagner@gmail.com>
+Dave Cheney <dave@cheney.net>
+Evan Phoenix <evan@fallingsnow.net>
+Francisco Souza <f@souza.cc>
+Hari haran <hariharan.uno@gmail.com>
+John C Barstow
+Kelvin Fo <vmirage@gmail.com>
+Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp>
+Matt Layher <mdlayher@gmail.com>
+Nathan Youngman <git@nathany.com>
+Nickolai Zeldovich <nickolai@csail.mit.edu>
+Patrick <patrick@dropbox.com>
+Paul Hammond <paul@paulhammond.org>
+Pawel Knap <pawelknap88@gmail.com>
+Pieter Droogendijk <pieter@binky.org.uk>
+Pursuit92 <JoshChase@techpursuit.net>
+Riku Voipio <riku.voipio@linaro.org>
+Rob Figueiredo <robfig@gmail.com>
+Rodrigo Chiossi <rodrigochiossi@gmail.com>
+Slawek Ligus <root@ooz.ie>
+Soge Zhang <zhssoge@gmail.com>
+Tiffany Jernigan <tiffany.jernigan@intel.com>
+Tilak Sharma <tilaks@google.com>
+Tom Payne <twpayne@gmail.com>
+Travis Cline <travis.cline@gmail.com>
+Tudor Golubenco <tudor.g@gmail.com>
+Vahe Khachikyan <vahe@live.ca>
+Yukang <moorekang@gmail.com>
+bronze1man <bronze1man@gmail.com>
+debrando <denis.brandolini@gmail.com>
+henrikedwards <henrik.edwards@gmail.com>
+铁哥 <guotie.9@gmail.com>

vendor/github.com/fsnotify/fsnotify/CHANGELOG.md

@@ -0,0 +1,317 @@
+# Changelog
+
+## v1.4.7 / 2018-01-09
+
+* BSD/macOS: Fix possible deadlock on closing the watcher on kqueue (thanks @nhooyr and @glycerine)
+* Tests: Fix missing verb on format string (thanks @rchiossi)
+* Linux: Fix deadlock in Remove (thanks @aarondl)
+* Linux: Watch.Add improvements (avoid race, fix consistency, reduce garbage) (thanks @twpayne)
+* Docs: Moved FAQ into the README (thanks @vahe)
+* Linux: Properly handle inotify's IN_Q_OVERFLOW event (thanks @zeldovich)
+* Docs: replace references to OS X with macOS
+
+## v1.4.2 / 2016-10-10
+
+* Linux: use InotifyInit1 with IN_CLOEXEC to stop leaking a file descriptor to a child process when using fork/exec [#178](https://github.com/fsnotify/fsnotify/pull/178) (thanks @pattyshack)
+
+## v1.4.1 / 2016-10-04
+
+* Fix flaky inotify stress test on Linux [#177](https://github.com/fsnotify/fsnotify/pull/177) (thanks @pattyshack)
+
+## v1.4.0 / 2016-10-01
+
+* add a String() method to Event.Op [#165](https://github.com/fsnotify/fsnotify/pull/165) (thanks @oozie)
+
+## v1.3.1 / 2016-06-28
+
+* Windows: fix for double backslash when watching the root of a drive [#151](https://github.com/fsnotify/fsnotify/issues/151) (thanks @brunoqc)
+
+## v1.3.0 / 2016-04-19
+
+* Support linux/arm64 by [patching](https://go-review.googlesource.com/#/c/21971/) x/sys/unix and switching to to it from syscall (thanks @suihkulokki) [#135](https://github.com/fsnotify/fsnotify/pull/135)
+
+## v1.2.10 / 2016-03-02
+
+* Fix golint errors in windows.go [#121](https://github.com/fsnotify/fsnotify/pull/121) (thanks @tiffanyfj)
+
+## v1.2.9 / 2016-01-13
+
+kqueue: Fix logic for CREATE after REMOVE [#111](https://github.com/fsnotify/fsnotify/pull/111) (thanks @bep)
+
+## v1.2.8 / 2015-12-17
+
+* kqueue: fix race condition in Close [#105](https://github.com/fsnotify/fsnotify/pull/105) (thanks @djui for reporting the issue and @ppknap for writing a failing test)
+* inotify: fix race in test
+* enable race detection for continuous integration (Linux, Mac, Windows)
+
+## v1.2.5 / 2015-10-17
+
+* inotify: use epoll_create1 for arm64 support (requires Linux 2.6.27 or later) [#100](https://github.com/fsnotify/fsnotify/pull/100) (thanks @suihkulokki)
+* inotify: fix path leaks [#73](https://github.com/fsnotify/fsnotify/pull/73) (thanks @chamaken)
+* kqueue: watch for rename events on subdirectories [#83](https://github.com/fsnotify/fsnotify/pull/83) (thanks @guotie)
+* kqueue: avoid infinite loops from symlinks cycles [#101](https://github.com/fsnotify/fsnotify/pull/101) (thanks @illicitonion)
+
+## v1.2.1 / 2015-10-14
+
+* kqueue: don't watch named pipes [#98](https://github.com/fsnotify/fsnotify/pull/98) (thanks @evanphx)
+
+## v1.2.0 / 2015-02-08
+
+* inotify: use epoll to wake up readEvents [#66](https://github.com/fsnotify/fsnotify/pull/66) (thanks @PieterD)
+* inotify: closing watcher should now always shut down goroutine [#63](https://github.com/fsnotify/fsnotify/pull/63) (thanks @PieterD)
+* kqueue: close kqueue after removing watches, fixes [#59](https://github.com/fsnotify/fsnotify/issues/59)
+
+## v1.1.1 / 2015-02-05
+
+* inotify: Retry read on EINTR [#61](https://github.com/fsnotify/fsnotify/issues/61) (thanks @PieterD)
+
+## v1.1.0 / 2014-12-12
+
+* kqueue: rework internals [#43](https://github.com/fsnotify/fsnotify/pull/43)
+    * add low-level functions
+    * only need to store flags on directories
+    * less mutexes [#13](https://github.com/fsnotify/fsnotify/issues/13)
+    * done can be an unbuffered channel
+    * remove calls to os.NewSyscallError
+* More efficient string concatenation for Event.String() [#52](https://github.com/fsnotify/fsnotify/pull/52) (thanks @mdlayher)
+* kqueue: fix regression in  rework causing subdirectories to be watched [#48](https://github.com/fsnotify/fsnotify/issues/48)
+* kqueue: cleanup internal watch before sending remove event [#51](https://github.com/fsnotify/fsnotify/issues/51)
+
+## v1.0.4 / 2014-09-07
+
+* kqueue: add dragonfly to the build tags.
+* Rename source code files, rearrange code so exported APIs are at the top.
+* Add done channel to example code. [#37](https://github.com/fsnotify/fsnotify/pull/37) (thanks @chenyukang)
+
+## v1.0.3 / 2014-08-19
+
+* [Fix] Windows MOVED_TO now translates to Create like on BSD and Linux. [#36](https://github.com/fsnotify/fsnotify/issues/36)
+
+## v1.0.2 / 2014-08-17
+
+* [Fix] Missing create events on macOS. [#14](https://github.com/fsnotify/fsnotify/issues/14) (thanks @zhsso)
+* [Fix] Make ./path and path equivalent. (thanks @zhsso)
+
+## v1.0.0 / 2014-08-15
+
+* [API] Remove AddWatch on Windows, use Add.
+* Improve documentation for exported identifiers. [#30](https://github.com/fsnotify/fsnotify/issues/30)
+* Minor updates based on feedback from golint.
+
+## dev / 2014-07-09
+
+* Moved to [github.com/fsnotify/fsnotify](https://github.com/fsnotify/fsnotify).
+* Use os.NewSyscallError instead of returning errno (thanks @hariharan-uno)
+
+## dev / 2014-07-04
+
+* kqueue: fix incorrect mutex used in Close()
+* Update example to demonstrate usage of Op.
+
+## dev / 2014-06-28
+
+* [API] Don't set the Write Op for attribute notifications [#4](https://github.com/fsnotify/fsnotify/issues/4)
+* Fix for String() method on Event (thanks Alex Brainman)
+* Don't build on Plan 9 or Solaris (thanks @4ad)
+
+## dev / 2014-06-21
+
+* Events channel of type Event rather than *Event.
+* [internal] use syscall constants directly for inotify and kqueue.
+* [internal] kqueue: rename events to kevents and fileEvent to event.
+
+## dev / 2014-06-19
+
+* Go 1.3+ required on Windows (uses syscall.ERROR_MORE_DATA internally).
+* [internal] remove cookie from Event struct (unused).
+* [internal] Event struct has the same definition across every OS.
+* [internal] remove internal watch and removeWatch methods.
+
+## dev / 2014-06-12
+
+* [API] Renamed Watch() to Add() and RemoveWatch() to Remove().
+* [API] Pluralized channel names: Events and Errors.
+* [API] Renamed FileEvent struct to Event.
+* [API] Op constants replace methods like IsCreate().
+
+## dev / 2014-06-12
+
+* Fix data race on kevent buffer (thanks @tilaks) [#98](https://github.com/howeyc/fsnotify/pull/98)
+
+## dev / 2014-05-23
+
+* [API] Remove current implementation of WatchFlags.
+    * current implementation doesn't take advantage of OS for efficiency
+    * provides little benefit over filtering events as they are received, but has  extra bookkeeping and mutexes
+    * no tests for the current implementation
+    * not fully implemented on Windows [#93](https://github.com/howeyc/fsnotify/issues/93#issuecomment-39285195)
+
+## v0.9.3 / 2014-12-31
+
+* kqueue: cleanup internal watch before sending remove event [#51](https://github.com/fsnotify/fsnotify/issues/51)
+
+## v0.9.2 / 2014-08-17
+
+* [Backport] Fix missing create events on macOS. [#14](https://github.com/fsnotify/fsnotify/issues/14) (thanks @zhsso)
+
+## v0.9.1 / 2014-06-12
+
+* Fix data race on kevent buffer (thanks @tilaks) [#98](https://github.com/howeyc/fsnotify/pull/98)
+
+## v0.9.0 / 2014-01-17
+
+* IsAttrib() for events that only concern a file's metadata [#79][] (thanks @abustany)
+* [Fix] kqueue: fix deadlock [#77][] (thanks @cespare)
+* [NOTICE] Development has moved to `code.google.com/p/go.exp/fsnotify` in preparation for inclusion in the Go standard library.
+
+## v0.8.12 / 2013-11-13
+
+* [API] Remove FD_SET and friends from Linux adapter
+
+## v0.8.11 / 2013-11-02
+
+* [Doc] Add Changelog [#72][] (thanks @nathany)
+* [Doc] Spotlight and double modify events on macOS [#62][] (reported by @paulhammond)
+
+## v0.8.10 / 2013-10-19
+
+* [Fix] kqueue: remove file watches when parent directory is removed [#71][] (reported by @mdwhatcott)
+* [Fix] kqueue: race between Close and readEvents [#70][] (reported by @bernerdschaefer)
+* [Doc] specify OS-specific limits in README (thanks @debrando)
+
+## v0.8.9 / 2013-09-08
+
+* [Doc] Contributing (thanks @nathany)
+* [Doc] update package path in example code [#63][] (thanks @paulhammond)
+* [Doc] GoCI badge in README (Linux only) [#60][]
+* [Doc] Cross-platform testing with Vagrant  [#59][] (thanks @nathany)
+
+## v0.8.8 / 2013-06-17
+
+* [Fix] Windows: handle `ERROR_MORE_DATA` on Windows [#49][] (thanks @jbowtie)
+
+## v0.8.7 / 2013-06-03
+
+* [API] Make syscall flags internal
+* [Fix] inotify: ignore event changes
+* [Fix] race in symlink test [#45][] (reported by @srid)
+* [Fix] tests on Windows
+* lower case error messages
+
+## v0.8.6 / 2013-05-23
+
+* kqueue: Use EVT_ONLY flag on Darwin
+* [Doc] Update README with full example
+
+## v0.8.5 / 2013-05-09
+
+* [Fix] inotify: allow monitoring of "broken" symlinks (thanks @tsg)
+
+## v0.8.4 / 2013-04-07
+
+* [Fix] kqueue: watch all file events [#40][] (thanks @ChrisBuchholz)
+
+## v0.8.3 / 2013-03-13
+
+* [Fix] inoitfy/kqueue memory leak [#36][] (reported by @nbkolchin)
+* [Fix] kqueue: use fsnFlags for watching a directory [#33][] (reported by @nbkolchin)
+
+## v0.8.2 / 2013-02-07
+
+* [Doc] add Authors
+* [Fix] fix data races for map access [#29][] (thanks @fsouza)
+
+## v0.8.1 / 2013-01-09
+
+* [Fix] Windows path separators
+* [Doc] BSD License
+
+## v0.8.0 / 2012-11-09
+
+* kqueue: directory watching improvements (thanks @vmirage)
+* inotify: add `IN_MOVED_TO` [#25][] (requested by @cpisto)
+* [Fix] kqueue: deleting watched directory [#24][] (reported by @jakerr)
+
+## v0.7.4 / 2012-10-09
+
+* [Fix] inotify: fixes from https://codereview.appspot.com/5418045/ (ugorji)
+* [Fix] kqueue: preserve watch flags when watching for delete [#21][] (reported by @robfig)
+* [Fix] kqueue: watch the directory even if it isn't a new watch (thanks @robfig)
+* [Fix] kqueue: modify after recreation of file
+
+## v0.7.3 / 2012-09-27
+
+* [Fix] kqueue: watch with an existing folder inside the watched folder (thanks @vmirage)
+* [Fix] kqueue: no longer get duplicate CREATE events
+
+## v0.7.2 / 2012-09-01
+
+* kqueue: events for created directories
+
+## v0.7.1 / 2012-07-14
+
+* [Fix] for renaming files
+
+## v0.7.0 / 2012-07-02
+
+* [Feature] FSNotify flags
+* [Fix] inotify: Added file name back to event path
+
+## v0.6.0 / 2012-06-06
+
+* kqueue: watch files after directory created (thanks @tmc)
+
+## v0.5.1 / 2012-05-22
+
+* [Fix] inotify: remove all watches before Close()
+
+## v0.5.0 / 2012-05-03
+
+* [API] kqueue: return errors during watch instead of sending over channel
+* kqueue: match symlink behavior on Linux
+* inotify: add `DELETE_SELF` (requested by @taralx)
+* [Fix] kqueue: handle EINTR (reported by @robfig)
+* [Doc] Godoc example [#1][] (thanks @davecheney)
+
+## v0.4.0 / 2012-03-30
+
+* Go 1 released: build with go tool
+* [Feature] Windows support using winfsnotify
+* Windows does not have attribute change notifications
+* Roll attribute notifications into IsModify
+
+## v0.3.0 / 2012-02-19
+
+* kqueue: add files when watch directory
+
+## v0.2.0 / 2011-12-30
+
+* update to latest Go weekly code
+
+## v0.1.0 / 2011-10-19
+
+* kqueue: add watch on file creation to match inotify
+* kqueue: create file event
+* inotify: ignore `IN_IGNORED` events
+* event String()
+* linux: common FileEvent functions
+* initial commit
+
+[#79]: https://github.com/howeyc/fsnotify/pull/79
+[#77]: https://github.com/howeyc/fsnotify/pull/77
+[#72]: https://github.com/howeyc/fsnotify/issues/72
+[#71]: https://github.com/howeyc/fsnotify/issues/71
+[#70]: https://github.com/howeyc/fsnotify/issues/70
+[#63]: https://github.com/howeyc/fsnotify/issues/63
+[#62]: https://github.com/howeyc/fsnotify/issues/62
+[#60]: https://github.com/howeyc/fsnotify/issues/60
+[#59]: https://github.com/howeyc/fsnotify/issues/59
+[#49]: https://github.com/howeyc/fsnotify/issues/49
+[#45]: https://github.com/howeyc/fsnotify/issues/45
+[#40]: https://github.com/howeyc/fsnotify/issues/40
+[#36]: https://github.com/howeyc/fsnotify/issues/36
+[#33]: https://github.com/howeyc/fsnotify/issues/33
+[#29]: https://github.com/howeyc/fsnotify/issues/29
+[#25]: https://github.com/howeyc/fsnotify/issues/25
+[#24]: https://github.com/howeyc/fsnotify/issues/24
+[#21]: https://github.com/howeyc/fsnotify/issues/21

vendor/github.com/fsnotify/fsnotify/CONTRIBUTING.md

@@ -0,0 +1,77 @@
+# Contributing
+
+## Issues
+
+* Request features and report bugs using the [GitHub Issue Tracker](https://github.com/fsnotify/fsnotify/issues).
+* Please indicate the platform you are using fsnotify on.
+* A code example to reproduce the problem is appreciated.
+
+## Pull Requests
+
+### Contributor License Agreement
+
+fsnotify is derived from code in the [golang.org/x/exp](https://godoc.org/golang.org/x/exp) package and it may be included [in the standard library](https://github.com/fsnotify/fsnotify/issues/1) in the future. Therefore fsnotify carries the same [LICENSE](https://github.com/fsnotify/fsnotify/blob/master/LICENSE) as Go. Contributors retain their copyright, so you need to fill out a short form before we can accept your contribution: [Google Individual Contributor License Agreement](https://developers.google.com/open-source/cla/individual).
+
+Please indicate that you have signed the CLA in your pull request.
+
+### How fsnotify is Developed
+
+* Development is done on feature branches.
+* Tests are run on BSD, Linux, macOS and Windows.
+* Pull requests are reviewed and [applied to master][am] using [hub][].
+  * Maintainers may modify or squash commits rather than asking contributors to.
+* To issue a new release, the maintainers will:
+  * Update the CHANGELOG
+  * Tag a version, which will become available through gopkg.in.
+ 
+### How to Fork
+
+For smooth sailing, always use the original import path. Installing with `go get` makes this easy. 
+
+1. Install from GitHub (`go get -u github.com/fsnotify/fsnotify`)
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Ensure everything works and the tests pass (see below)
+4. Commit your changes (`git commit -am 'Add some feature'`)
+
+Contribute upstream:
+
+1. Fork fsnotify on GitHub
+2. Add your remote (`git remote add fork git@github.com:mycompany/repo.git`)
+3. Push to the branch (`git push fork my-new-feature`)
+4. Create a new Pull Request on GitHub
+
+This workflow is [thoroughly explained by Katrina Owen](https://splice.com/blog/contributing-open-source-git-repositories-go/).
+
+### Testing
+
+fsnotify uses build tags to compile different code on Linux, BSD, macOS, and Windows.
+
+Before doing a pull request, please do your best to test your changes on multiple platforms, and list which platforms you were able/unable to test on.
+
+To aid in cross-platform testing there is a Vagrantfile for Linux and BSD.
+
+* Install [Vagrant](http://www.vagrantup.com/) and [VirtualBox](https://www.virtualbox.org/)
+* Setup [Vagrant Gopher](https://github.com/nathany/vagrant-gopher) in your `src` folder.
+* Run `vagrant up` from the project folder. You can also setup just one box with `vagrant up linux` or `vagrant up bsd` (note: the BSD box doesn't support Windows hosts at this time, and NFS may prompt for your host OS password)
+* Once setup, you can run the test suite on a given OS with a single command `vagrant ssh linux -c 'cd fsnotify/fsnotify; go test'`.
+* When you're done, you will want to halt or destroy the Vagrant boxes.
+
+Notice: fsnotify file system events won't trigger in shared folders. The tests get around this limitation by using the /tmp directory.
+
+Right now there is no equivalent solution for Windows and macOS, but there are Windows VMs [freely available from Microsoft](http://www.modern.ie/en-us/virtualization-tools#downloads).
+
+### Maintainers
+
+Help maintaining fsnotify is welcome. To be a maintainer:
+
+* Submit a pull request and sign the CLA as above.
+* You must be able to run the test suite on Mac, Windows, Linux and BSD.
+
+To keep master clean, the fsnotify project uses the "apply mail" workflow outlined in Nathaniel Talbott's post ["Merge pull request" Considered Harmful][am]. This requires installing [hub][].
+
+All code changes should be internal pull requests.
+
+Releases are tagged using [Semantic Versioning](http://semver.org/).
+
+[hub]: https://github.com/github/hub
+[am]: http://blog.spreedly.com/2014/06/24/merge-pull-request-considered-harmful/#.VGa5yZPF_Zs

vendor/github.com/fsnotify/fsnotify/LICENSE

@@ -0,0 +1,28 @@
+Copyright (c) 2012 The Go Authors. All rights reserved.
+Copyright (c) 2012-2019 fsnotify Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/github.com/fsnotify/fsnotify/README.md

@@ -0,0 +1,130 @@
+# File system notifications for Go
+
+[![GoDoc](https://godoc.org/github.com/fsnotify/fsnotify?status.svg)](https://godoc.org/github.com/fsnotify/fsnotify) [![Go Report Card](https://goreportcard.com/badge/github.com/fsnotify/fsnotify)](https://goreportcard.com/report/github.com/fsnotify/fsnotify)
+
+fsnotify utilizes [golang.org/x/sys](https://godoc.org/golang.org/x/sys) rather than `syscall` from the standard library. Ensure you have the latest version installed by running:
+
+```console
+go get -u golang.org/x/sys/...
+```
+
+Cross platform: Windows, Linux, BSD and macOS.
+
+| Adapter               | OS                               | Status                                                                                                                          |
+| --------------------- | -------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
+| inotify               | Linux 2.6.27 or later, Android\* | Supported [![Build Status](https://travis-ci.org/fsnotify/fsnotify.svg?branch=master)](https://travis-ci.org/fsnotify/fsnotify) |
+| kqueue                | BSD, macOS, iOS\*                | Supported [![Build Status](https://travis-ci.org/fsnotify/fsnotify.svg?branch=master)](https://travis-ci.org/fsnotify/fsnotify) |
+| ReadDirectoryChangesW | Windows                          | Supported [![Build Status](https://travis-ci.org/fsnotify/fsnotify.svg?branch=master)](https://travis-ci.org/fsnotify/fsnotify) |
+| FSEvents              | macOS                            | [Planned](https://github.com/fsnotify/fsnotify/issues/11)                                                                       |
+| FEN                   | Solaris 11                       | [In Progress](https://github.com/fsnotify/fsnotify/issues/12)                                                                   |
+| fanotify              | Linux 2.6.37+                    | [Planned](https://github.com/fsnotify/fsnotify/issues/114)                                                                      |
+| USN Journals          | Windows                          | [Maybe](https://github.com/fsnotify/fsnotify/issues/53)                                                                         |
+| Polling               | *All*                            | [Maybe](https://github.com/fsnotify/fsnotify/issues/9)                                                                          |
+
+\* Android and iOS are untested.
+
+Please see [the documentation](https://godoc.org/github.com/fsnotify/fsnotify) and consult the [FAQ](#faq) for usage information.
+
+## API stability
+
+fsnotify is a fork of [howeyc/fsnotify](https://godoc.org/github.com/howeyc/fsnotify) with a new API as of v1.0. The API is based on [this design document](http://goo.gl/MrYxyA). 
+
+All [releases](https://github.com/fsnotify/fsnotify/releases) are tagged based on [Semantic Versioning](http://semver.org/). Further API changes are [planned](https://github.com/fsnotify/fsnotify/milestones), and will be tagged with a new major revision number.
+
+Go 1.6 supports dependencies located in the `vendor/` folder. Unless you are creating a library, it is recommended that you copy fsnotify into `vendor/github.com/fsnotify/fsnotify` within your project, and likewise for `golang.org/x/sys`.
+
+## Usage
+
+```go
+package main
+
+import (
+	"log"
+
+	"github.com/fsnotify/fsnotify"
+)
+
+func main() {
+	watcher, err := fsnotify.NewWatcher()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer watcher.Close()
+
+	done := make(chan bool)
+	go func() {
+		for {
+			select {
+			case event, ok := <-watcher.Events:
+				if !ok {
+					return
+				}
+				log.Println("event:", event)
+				if event.Op&fsnotify.Write == fsnotify.Write {
+					log.Println("modified file:", event.Name)
+				}
+			case err, ok := <-watcher.Errors:
+				if !ok {
+					return
+				}
+				log.Println("error:", err)
+			}
+		}
+	}()
+
+	err = watcher.Add("/tmp/foo")
+	if err != nil {
+		log.Fatal(err)
+	}
+	<-done
+}
+```
+
+## Contributing
+
+Please refer to [CONTRIBUTING][] before opening an issue or pull request.
+
+## Example
+
+See [example_test.go](https://github.com/fsnotify/fsnotify/blob/master/example_test.go).
+
+## FAQ
+
+**When a file is moved to another directory is it still being watched?**
+
+No (it shouldn't be, unless you are watching where it was moved to).
+
+**When I watch a directory, are all subdirectories watched as well?**
+
+No, you must add watches for any directory you want to watch (a recursive watcher is on the roadmap [#18][]).
+
+**Do I have to watch the Error and Event channels in a separate goroutine?**
+
+As of now, yes. Looking into making this single-thread friendly (see [howeyc #7][#7])
+
+**Why am I receiving multiple events for the same file on OS X?**
+
+Spotlight indexing on OS X can result in multiple events (see [howeyc #62][#62]). A temporary workaround is to add your folder(s) to the *Spotlight Privacy settings* until we have a native FSEvents implementation (see [#11][]).
+
+**How many files can be watched at once?**
+
+There are OS-specific limits as to how many watches can be created:
+* Linux: /proc/sys/fs/inotify/max_user_watches contains the limit, reaching this limit results in a "no space left on device" error.
+* BSD / OSX: sysctl variables "kern.maxfiles" and "kern.maxfilesperproc", reaching these limits results in a "too many open files" error.
+
+**Why don't notifications work with NFS filesystems or filesystem in userspace (FUSE)?**
+
+fsnotify requires support from underlying OS to work. The current NFS protocol does not provide network level support for file notifications.
+
+[#62]: https://github.com/howeyc/fsnotify/issues/62
+[#18]: https://github.com/fsnotify/fsnotify/issues/18
+[#11]: https://github.com/fsnotify/fsnotify/issues/11
+[#7]: https://github.com/howeyc/fsnotify/issues/7
+
+[contributing]: https://github.com/fsnotify/fsnotify/blob/master/CONTRIBUTING.md
+
+## Related Projects
+
+* [notify](https://github.com/rjeczalik/notify)
+* [fsevents](https://github.com/fsnotify/fsevents)
+

vendor/github.com/fsnotify/fsnotify/fen.go

@@ -0,0 +1,37 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build solaris
+
+package fsnotify
+
+import (
+	"errors"
+)
+
+// Watcher watches a set of files, delivering events to a channel.
+type Watcher struct {
+	Events chan Event
+	Errors chan error
+}
+
+// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
+func NewWatcher() (*Watcher, error) {
+	return nil, errors.New("FEN based watcher not yet supported for fsnotify\n")
+}
+
+// Close removes all watches and closes the events channel.
+func (w *Watcher) Close() error {
+	return nil
+}
+
+// Add starts watching the named file or directory (non-recursively).
+func (w *Watcher) Add(name string) error {
+	return nil
+}
+
+// Remove stops watching the the named file or directory (non-recursively).
+func (w *Watcher) Remove(name string) error {
+	return nil
+}

vendor/github.com/fsnotify/fsnotify/fsnotify.go

@@ -0,0 +1,68 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !plan9
+
+// Package fsnotify provides a platform-independent interface for file system notifications.
+package fsnotify
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+)
+
+// Event represents a single file system notification.
+type Event struct {
+	Name string // Relative path to the file or directory.
+	Op   Op     // File operation that triggered the event.
+}
+
+// Op describes a set of file operations.
+type Op uint32
+
+// These are the generalized file operations that can trigger a notification.
+const (
+	Create Op = 1 << iota
+	Write
+	Remove
+	Rename
+	Chmod
+)
+
+func (op Op) String() string {
+	// Use a buffer for efficient string concatenation
+	var buffer bytes.Buffer
+
+	if op&Create == Create {
+		buffer.WriteString("|CREATE")
+	}
+	if op&Remove == Remove {
+		buffer.WriteString("|REMOVE")
+	}
+	if op&Write == Write {
+		buffer.WriteString("|WRITE")
+	}
+	if op&Rename == Rename {
+		buffer.WriteString("|RENAME")
+	}
+	if op&Chmod == Chmod {
+		buffer.WriteString("|CHMOD")
+	}
+	if buffer.Len() == 0 {
+		return ""
+	}
+	return buffer.String()[1:] // Strip leading pipe
+}
+
+// String returns a string representation of the event in the form
+// "file: REMOVE|WRITE|..."
+func (e Event) String() string {
+	return fmt.Sprintf("%q: %s", e.Name, e.Op.String())
+}
+
+// Common errors that can be reported by a watcher
+var (
+	ErrEventOverflow = errors.New("fsnotify queue overflow")
+)

vendor/github.com/fsnotify/fsnotify/go.mod

@@ -0,0 +1,5 @@
+module github.com/fsnotify/fsnotify
+
+go 1.13
+
+require golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9

vendor/github.com/fsnotify/fsnotify/go.sum

@@ -0,0 +1,2 @@
+golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9 h1:L2auWcuQIvxz9xSEqzESnV/QN/gNRXNApHi3fYwl2w0=
+golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

vendor/github.com/fsnotify/fsnotify/inotify.go

@@ -0,0 +1,337 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+
+package fsnotify
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Watcher watches a set of files, delivering events to a channel.
+type Watcher struct {
+	Events   chan Event
+	Errors   chan error
+	mu       sync.Mutex // Map access
+	fd       int
+	poller   *fdPoller
+	watches  map[string]*watch // Map of inotify watches (key: path)
+	paths    map[int]string    // Map of watched paths (key: watch descriptor)
+	done     chan struct{}     // Channel for sending a "quit message" to the reader goroutine
+	doneResp chan struct{}     // Channel to respond to Close
+}
+
+// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
+func NewWatcher() (*Watcher, error) {
+	// Create inotify fd
+	fd, errno := unix.InotifyInit1(unix.IN_CLOEXEC)
+	if fd == -1 {
+		return nil, errno
+	}
+	// Create epoll
+	poller, err := newFdPoller(fd)
+	if err != nil {
+		unix.Close(fd)
+		return nil, err
+	}
+	w := &Watcher{
+		fd:       fd,
+		poller:   poller,
+		watches:  make(map[string]*watch),
+		paths:    make(map[int]string),
+		Events:   make(chan Event),
+		Errors:   make(chan error),
+		done:     make(chan struct{}),
+		doneResp: make(chan struct{}),
+	}
+
+	go w.readEvents()
+	return w, nil
+}
+
+func (w *Watcher) isClosed() bool {
+	select {
+	case <-w.done:
+		return true
+	default:
+		return false
+	}
+}
+
+// Close removes all watches and closes the events channel.
+func (w *Watcher) Close() error {
+	if w.isClosed() {
+		return nil
+	}
+
+	// Send 'close' signal to goroutine, and set the Watcher to closed.
+	close(w.done)
+
+	// Wake up goroutine
+	w.poller.wake()
+
+	// Wait for goroutine to close
+	<-w.doneResp
+
+	return nil
+}
+
+// Add starts watching the named file or directory (non-recursively).
+func (w *Watcher) Add(name string) error {
+	name = filepath.Clean(name)
+	if w.isClosed() {
+		return errors.New("inotify instance already closed")
+	}
+
+	const agnosticEvents = unix.IN_MOVED_TO | unix.IN_MOVED_FROM |
+		unix.IN_CREATE | unix.IN_ATTRIB | unix.IN_MODIFY |
+		unix.IN_MOVE_SELF | unix.IN_DELETE | unix.IN_DELETE_SELF
+
+	var flags uint32 = agnosticEvents
+
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	watchEntry := w.watches[name]
+	if watchEntry != nil {
+		flags |= watchEntry.flags | unix.IN_MASK_ADD
+	}
+	wd, errno := unix.InotifyAddWatch(w.fd, name, flags)
+	if wd == -1 {
+		return errno
+	}
+
+	if watchEntry == nil {
+		w.watches[name] = &watch{wd: uint32(wd), flags: flags}
+		w.paths[wd] = name
+	} else {
+		watchEntry.wd = uint32(wd)
+		watchEntry.flags = flags
+	}
+
+	return nil
+}
+
+// Remove stops watching the named file or directory (non-recursively).
+func (w *Watcher) Remove(name string) error {
+	name = filepath.Clean(name)
+
+	// Fetch the watch.
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	watch, ok := w.watches[name]
+
+	// Remove it from inotify.
+	if !ok {
+		return fmt.Errorf("can't remove non-existent inotify watch for: %s", name)
+	}
+
+	// We successfully removed the watch if InotifyRmWatch doesn't return an
+	// error, we need to clean up our internal state to ensure it matches
+	// inotify's kernel state.
+	delete(w.paths, int(watch.wd))
+	delete(w.watches, name)
+
+	// inotify_rm_watch will return EINVAL if the file has been deleted;
+	// the inotify will already have been removed.
+	// watches and pathes are deleted in ignoreLinux() implicitly and asynchronously
+	// by calling inotify_rm_watch() below. e.g. readEvents() goroutine receives IN_IGNORE
+	// so that EINVAL means that the wd is being rm_watch()ed or its file removed
+	// by another thread and we have not received IN_IGNORE event.
+	success, errno := unix.InotifyRmWatch(w.fd, watch.wd)
+	if success == -1 {
+		// TODO: Perhaps it's not helpful to return an error here in every case.
+		// the only two possible errors are:
+		// EBADF, which happens when w.fd is not a valid file descriptor of any kind.
+		// EINVAL, which is when fd is not an inotify descriptor or wd is not a valid watch descriptor.
+		// Watch descriptors are invalidated when they are removed explicitly or implicitly;
+		// explicitly by inotify_rm_watch, implicitly when the file they are watching is deleted.
+		return errno
+	}
+
+	return nil
+}
+
+type watch struct {
+	wd    uint32 // Watch descriptor (as returned by the inotify_add_watch() syscall)
+	flags uint32 // inotify flags of this watch (see inotify(7) for the list of valid flags)
+}
+
+// readEvents reads from the inotify file descriptor, converts the
+// received events into Event objects and sends them via the Events channel
+func (w *Watcher) readEvents() {
+	var (
+		buf   [unix.SizeofInotifyEvent * 4096]byte // Buffer for a maximum of 4096 raw events
+		n     int                                  // Number of bytes read with read()
+		errno error                                // Syscall errno
+		ok    bool                                 // For poller.wait
+	)
+
+	defer close(w.doneResp)
+	defer close(w.Errors)
+	defer close(w.Events)
+	defer unix.Close(w.fd)
+	defer w.poller.close()
+
+	for {
+		// See if we have been closed.
+		if w.isClosed() {
+			return
+		}
+
+		ok, errno = w.poller.wait()
+		if errno != nil {
+			select {
+			case w.Errors <- errno:
+			case <-w.done:
+				return
+			}
+			continue
+		}
+
+		if !ok {
+			continue
+		}
+
+		n, errno = unix.Read(w.fd, buf[:])
+		// If a signal interrupted execution, see if we've been asked to close, and try again.
+		// http://man7.org/linux/man-pages/man7/signal.7.html :
+		// "Before Linux 3.8, reads from an inotify(7) file descriptor were not restartable"
+		if errno == unix.EINTR {
+			continue
+		}
+
+		// unix.Read might have been woken up by Close. If so, we're done.
+		if w.isClosed() {
+			return
+		}
+
+		if n < unix.SizeofInotifyEvent {
+			var err error
+			if n == 0 {
+				// If EOF is received. This should really never happen.
+				err = io.EOF
+			} else if n < 0 {
+				// If an error occurred while reading.
+				err = errno
+			} else {
+				// Read was too short.
+				err = errors.New("notify: short read in readEvents()")
+			}
+			select {
+			case w.Errors <- err:
+			case <-w.done:
+				return
+			}
+			continue
+		}
+
+		var offset uint32
+		// We don't know how many events we just read into the buffer
+		// While the offset points to at least one whole event...
+		for offset <= uint32(n-unix.SizeofInotifyEvent) {
+			// Point "raw" to the event in the buffer
+			raw := (*unix.InotifyEvent)(unsafe.Pointer(&buf[offset]))
+
+			mask := uint32(raw.Mask)
+			nameLen := uint32(raw.Len)
+
+			if mask&unix.IN_Q_OVERFLOW != 0 {
+				select {
+				case w.Errors <- ErrEventOverflow:
+				case <-w.done:
+					return
+				}
+			}
+
+			// If the event happened to the watched directory or the watched file, the kernel
+			// doesn't append the filename to the event, but we would like to always fill the
+			// the "Name" field with a valid filename. We retrieve the path of the watch from
+			// the "paths" map.
+			w.mu.Lock()
+			name, ok := w.paths[int(raw.Wd)]
+			// IN_DELETE_SELF occurs when the file/directory being watched is removed.
+			// This is a sign to clean up the maps, otherwise we are no longer in sync
+			// with the inotify kernel state which has already deleted the watch
+			// automatically.
+			if ok && mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF {
+				delete(w.paths, int(raw.Wd))
+				delete(w.watches, name)
+			}
+			w.mu.Unlock()
+
+			if nameLen > 0 {
+				// Point "bytes" at the first byte of the filename
+				bytes := (*[unix.PathMax]byte)(unsafe.Pointer(&buf[offset+unix.SizeofInotifyEvent]))
+				// The filename is padded with NULL bytes. TrimRight() gets rid of those.
+				name += "/" + strings.TrimRight(string(bytes[0:nameLen]), "\000")
+			}
+
+			event := newEvent(name, mask)
+
+			// Send the events that are not ignored on the events channel
+			if !event.ignoreLinux(mask) {
+				select {
+				case w.Events <- event:
+				case <-w.done:
+					return
+				}
+			}
+
+			// Move to the next event in the buffer
+			offset += unix.SizeofInotifyEvent + nameLen
+		}
+	}
+}
+
+// Certain types of events can be "ignored" and not sent over the Events
+// channel. Such as events marked ignore by the kernel, or MODIFY events
+// against files that do not exist.
+func (e *Event) ignoreLinux(mask uint32) bool {
+	// Ignore anything the inotify API says to ignore
+	if mask&unix.IN_IGNORED == unix.IN_IGNORED {
+		return true
+	}
+
+	// If the event is not a DELETE or RENAME, the file must exist.
+	// Otherwise the event is ignored.
+	// *Note*: this was put in place because it was seen that a MODIFY
+	// event was sent after the DELETE. This ignores that MODIFY and
+	// assumes a DELETE will come or has come if the file doesn't exist.
+	if !(e.Op&Remove == Remove || e.Op&Rename == Rename) {
+		_, statErr := os.Lstat(e.Name)
+		return os.IsNotExist(statErr)
+	}
+	return false
+}
+
+// newEvent returns an platform-independent Event based on an inotify mask.
+func newEvent(name string, mask uint32) Event {
+	e := Event{Name: name}
+	if mask&unix.IN_CREATE == unix.IN_CREATE || mask&unix.IN_MOVED_TO == unix.IN_MOVED_TO {
+		e.Op |= Create
+	}
+	if mask&unix.IN_DELETE_SELF == unix.IN_DELETE_SELF || mask&unix.IN_DELETE == unix.IN_DELETE {
+		e.Op |= Remove
+	}
+	if mask&unix.IN_MODIFY == unix.IN_MODIFY {
+		e.Op |= Write
+	}
+	if mask&unix.IN_MOVE_SELF == unix.IN_MOVE_SELF || mask&unix.IN_MOVED_FROM == unix.IN_MOVED_FROM {
+		e.Op |= Rename
+	}
+	if mask&unix.IN_ATTRIB == unix.IN_ATTRIB {
+		e.Op |= Chmod
+	}
+	return e
+}

vendor/github.com/fsnotify/fsnotify/inotify_poller.go

@@ -0,0 +1,187 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+
+package fsnotify
+
+import (
+	"errors"
+
+	"golang.org/x/sys/unix"
+)
+
+type fdPoller struct {
+	fd   int    // File descriptor (as returned by the inotify_init() syscall)
+	epfd int    // Epoll file descriptor
+	pipe [2]int // Pipe for waking up
+}
+
+func emptyPoller(fd int) *fdPoller {
+	poller := new(fdPoller)
+	poller.fd = fd
+	poller.epfd = -1
+	poller.pipe[0] = -1
+	poller.pipe[1] = -1
+	return poller
+}
+
+// Create a new inotify poller.
+// This creates an inotify handler, and an epoll handler.
+func newFdPoller(fd int) (*fdPoller, error) {
+	var errno error
+	poller := emptyPoller(fd)
+	defer func() {
+		if errno != nil {
+			poller.close()
+		}
+	}()
+	poller.fd = fd
+
+	// Create epoll fd
+	poller.epfd, errno = unix.EpollCreate1(unix.EPOLL_CLOEXEC)
+	if poller.epfd == -1 {
+		return nil, errno
+	}
+	// Create pipe; pipe[0] is the read end, pipe[1] the write end.
+	errno = unix.Pipe2(poller.pipe[:], unix.O_NONBLOCK|unix.O_CLOEXEC)
+	if errno != nil {
+		return nil, errno
+	}
+
+	// Register inotify fd with epoll
+	event := unix.EpollEvent{
+		Fd:     int32(poller.fd),
+		Events: unix.EPOLLIN,
+	}
+	errno = unix.EpollCtl(poller.epfd, unix.EPOLL_CTL_ADD, poller.fd, &event)
+	if errno != nil {
+		return nil, errno
+	}
+
+	// Register pipe fd with epoll
+	event = unix.EpollEvent{
+		Fd:     int32(poller.pipe[0]),
+		Events: unix.EPOLLIN,
+	}
+	errno = unix.EpollCtl(poller.epfd, unix.EPOLL_CTL_ADD, poller.pipe[0], &event)
+	if errno != nil {
+		return nil, errno
+	}
+
+	return poller, nil
+}
+
+// Wait using epoll.
+// Returns true if something is ready to be read,
+// false if there is not.
+func (poller *fdPoller) wait() (bool, error) {
+	// 3 possible events per fd, and 2 fds, makes a maximum of 6 events.
+	// I don't know whether epoll_wait returns the number of events returned,
+	// or the total number of events ready.
+	// I decided to catch both by making the buffer one larger than the maximum.
+	events := make([]unix.EpollEvent, 7)
+	for {
+		n, errno := unix.EpollWait(poller.epfd, events, -1)
+		if n == -1 {
+			if errno == unix.EINTR {
+				continue
+			}
+			return false, errno
+		}
+		if n == 0 {
+			// If there are no events, try again.
+			continue
+		}
+		if n > 6 {
+			// This should never happen. More events were returned than should be possible.
+			return false, errors.New("epoll_wait returned more events than I know what to do with")
+		}
+		ready := events[:n]
+		epollhup := false
+		epollerr := false
+		epollin := false
+		for _, event := range ready {
+			if event.Fd == int32(poller.fd) {
+				if event.Events&unix.EPOLLHUP != 0 {
+					// This should not happen, but if it does, treat it as a wakeup.
+					epollhup = true
+				}
+				if event.Events&unix.EPOLLERR != 0 {
+					// If an error is waiting on the file descriptor, we should pretend
+					// something is ready to read, and let unix.Read pick up the error.
+					epollerr = true
+				}
+				if event.Events&unix.EPOLLIN != 0 {
+					// There is data to read.
+					epollin = true
+				}
+			}
+			if event.Fd == int32(poller.pipe[0]) {
+				if event.Events&unix.EPOLLHUP != 0 {
+					// Write pipe descriptor was closed, by us. This means we're closing down the
+					// watcher, and we should wake up.
+				}
+				if event.Events&unix.EPOLLERR != 0 {
+					// If an error is waiting on the pipe file descriptor.
+					// This is an absolute mystery, and should never ever happen.
+					return false, errors.New("Error on the pipe descriptor.")
+				}
+				if event.Events&unix.EPOLLIN != 0 {
+					// This is a regular wakeup, so we have to clear the buffer.
+					err := poller.clearWake()
+					if err != nil {
+						return false, err
+					}
+				}
+			}
+		}
+
+		if epollhup || epollerr || epollin {
+			return true, nil
+		}
+		return false, nil
+	}
+}
+
+// Close the write end of the poller.
+func (poller *fdPoller) wake() error {
+	buf := make([]byte, 1)
+	n, errno := unix.Write(poller.pipe[1], buf)
+	if n == -1 {
+		if errno == unix.EAGAIN {
+			// Buffer is full, poller will wake.
+			return nil
+		}
+		return errno
+	}
+	return nil
+}
+
+func (poller *fdPoller) clearWake() error {
+	// You have to be woken up a LOT in order to get to 100!
+	buf := make([]byte, 100)
+	n, errno := unix.Read(poller.pipe[0], buf)
+	if n == -1 {
+		if errno == unix.EAGAIN {
+			// Buffer is empty, someone else cleared our wake.
+			return nil
+		}
+		return errno
+	}
+	return nil
+}
+
+// Close all poller file descriptors, but not the one passed to it.
+func (poller *fdPoller) close() {
+	if poller.pipe[1] != -1 {
+		unix.Close(poller.pipe[1])
+	}
+	if poller.pipe[0] != -1 {
+		unix.Close(poller.pipe[0])
+	}
+	if poller.epfd != -1 {
+		unix.Close(poller.epfd)
+	}
+}

vendor/github.com/fsnotify/fsnotify/kqueue.go

@@ -0,0 +1,521 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build freebsd openbsd netbsd dragonfly darwin
+
+package fsnotify
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"golang.org/x/sys/unix"
+)
+
+// Watcher watches a set of files, delivering events to a channel.
+type Watcher struct {
+	Events chan Event
+	Errors chan error
+	done   chan struct{} // Channel for sending a "quit message" to the reader goroutine
+
+	kq int // File descriptor (as returned by the kqueue() syscall).
+
+	mu              sync.Mutex        // Protects access to watcher data
+	watches         map[string]int    // Map of watched file descriptors (key: path).
+	externalWatches map[string]bool   // Map of watches added by user of the library.
+	dirFlags        map[string]uint32 // Map of watched directories to fflags used in kqueue.
+	paths           map[int]pathInfo  // Map file descriptors to path names for processing kqueue events.
+	fileExists      map[string]bool   // Keep track of if we know this file exists (to stop duplicate create events).
+	isClosed        bool              // Set to true when Close() is first called
+}
+
+type pathInfo struct {
+	name  string
+	isDir bool
+}
+
+// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
+func NewWatcher() (*Watcher, error) {
+	kq, err := kqueue()
+	if err != nil {
+		return nil, err
+	}
+
+	w := &Watcher{
+		kq:              kq,
+		watches:         make(map[string]int),
+		dirFlags:        make(map[string]uint32),
+		paths:           make(map[int]pathInfo),
+		fileExists:      make(map[string]bool),
+		externalWatches: make(map[string]bool),
+		Events:          make(chan Event),
+		Errors:          make(chan error),
+		done:            make(chan struct{}),
+	}
+
+	go w.readEvents()
+	return w, nil
+}
+
+// Close removes all watches and closes the events channel.
+func (w *Watcher) Close() error {
+	w.mu.Lock()
+	if w.isClosed {
+		w.mu.Unlock()
+		return nil
+	}
+	w.isClosed = true
+
+	// copy paths to remove while locked
+	var pathsToRemove = make([]string, 0, len(w.watches))
+	for name := range w.watches {
+		pathsToRemove = append(pathsToRemove, name)
+	}
+	w.mu.Unlock()
+	// unlock before calling Remove, which also locks
+
+	for _, name := range pathsToRemove {
+		w.Remove(name)
+	}
+
+	// send a "quit" message to the reader goroutine
+	close(w.done)
+
+	return nil
+}
+
+// Add starts watching the named file or directory (non-recursively).
+func (w *Watcher) Add(name string) error {
+	w.mu.Lock()
+	w.externalWatches[name] = true
+	w.mu.Unlock()
+	_, err := w.addWatch(name, noteAllEvents)
+	return err
+}
+
+// Remove stops watching the the named file or directory (non-recursively).
+func (w *Watcher) Remove(name string) error {
+	name = filepath.Clean(name)
+	w.mu.Lock()
+	watchfd, ok := w.watches[name]
+	w.mu.Unlock()
+	if !ok {
+		return fmt.Errorf("can't remove non-existent kevent watch for: %s", name)
+	}
+
+	const registerRemove = unix.EV_DELETE
+	if err := register(w.kq, []int{watchfd}, registerRemove, 0); err != nil {
+		return err
+	}
+
+	unix.Close(watchfd)
+
+	w.mu.Lock()
+	isDir := w.paths[watchfd].isDir
+	delete(w.watches, name)
+	delete(w.paths, watchfd)
+	delete(w.dirFlags, name)
+	w.mu.Unlock()
+
+	// Find all watched paths that are in this directory that are not external.
+	if isDir {
+		var pathsToRemove []string
+		w.mu.Lock()
+		for _, path := range w.paths {
+			wdir, _ := filepath.Split(path.name)
+			if filepath.Clean(wdir) == name {
+				if !w.externalWatches[path.name] {
+					pathsToRemove = append(pathsToRemove, path.name)
+				}
+			}
+		}
+		w.mu.Unlock()
+		for _, name := range pathsToRemove {
+			// Since these are internal, not much sense in propagating error
+			// to the user, as that will just confuse them with an error about
+			// a path they did not explicitly watch themselves.
+			w.Remove(name)
+		}
+	}
+
+	return nil
+}
+
+// Watch all events (except NOTE_EXTEND, NOTE_LINK, NOTE_REVOKE)
+const noteAllEvents = unix.NOTE_DELETE | unix.NOTE_WRITE | unix.NOTE_ATTRIB | unix.NOTE_RENAME
+
+// keventWaitTime to block on each read from kevent
+var keventWaitTime = durationToTimespec(100 * time.Millisecond)
+
+// addWatch adds name to the watched file set.
+// The flags are interpreted as described in kevent(2).
+// Returns the real path to the file which was added, if any, which may be different from the one passed in the case of symlinks.
+func (w *Watcher) addWatch(name string, flags uint32) (string, error) {
+	var isDir bool
+	// Make ./name and name equivalent
+	name = filepath.Clean(name)
+
+	w.mu.Lock()
+	if w.isClosed {
+		w.mu.Unlock()
+		return "", errors.New("kevent instance already closed")
+	}
+	watchfd, alreadyWatching := w.watches[name]
+	// We already have a watch, but we can still override flags.
+	if alreadyWatching {
+		isDir = w.paths[watchfd].isDir
+	}
+	w.mu.Unlock()
+
+	if !alreadyWatching {
+		fi, err := os.Lstat(name)
+		if err != nil {
+			return "", err
+		}
+
+		// Don't watch sockets.
+		if fi.Mode()&os.ModeSocket == os.ModeSocket {
+			return "", nil
+		}
+
+		// Don't watch named pipes.
+		if fi.Mode()&os.ModeNamedPipe == os.ModeNamedPipe {
+			return "", nil
+		}
+
+		// Follow Symlinks
+		// Unfortunately, Linux can add bogus symlinks to watch list without
+		// issue, and Windows can't do symlinks period (AFAIK). To  maintain
+		// consistency, we will act like everything is fine. There will simply
+		// be no file events for broken symlinks.
+		// Hence the returns of nil on errors.
+		if fi.Mode()&os.ModeSymlink == os.ModeSymlink {
+			name, err = filepath.EvalSymlinks(name)
+			if err != nil {
+				return "", nil
+			}
+
+			w.mu.Lock()
+			_, alreadyWatching = w.watches[name]
+			w.mu.Unlock()
+
+			if alreadyWatching {
+				return name, nil
+			}
+
+			fi, err = os.Lstat(name)
+			if err != nil {
+				return "", nil
+			}
+		}
+
+		watchfd, err = unix.Open(name, openMode, 0700)
+		if watchfd == -1 {
+			return "", err
+		}
+
+		isDir = fi.IsDir()
+	}
+
+	const registerAdd = unix.EV_ADD | unix.EV_CLEAR | unix.EV_ENABLE
+	if err := register(w.kq, []int{watchfd}, registerAdd, flags); err != nil {
+		unix.Close(watchfd)
+		return "", err
+	}
+
+	if !alreadyWatching {
+		w.mu.Lock()
+		w.watches[name] = watchfd
+		w.paths[watchfd] = pathInfo{name: name, isDir: isDir}
+		w.mu.Unlock()
+	}
+
+	if isDir {
+		// Watch the directory if it has not been watched before,
+		// or if it was watched before, but perhaps only a NOTE_DELETE (watchDirectoryFiles)
+		w.mu.Lock()
+
+		watchDir := (flags&unix.NOTE_WRITE) == unix.NOTE_WRITE &&
+			(!alreadyWatching || (w.dirFlags[name]&unix.NOTE_WRITE) != unix.NOTE_WRITE)
+		// Store flags so this watch can be updated later
+		w.dirFlags[name] = flags
+		w.mu.Unlock()
+
+		if watchDir {
+			if err := w.watchDirectoryFiles(name); err != nil {
+				return "", err
+			}
+		}
+	}
+	return name, nil
+}
+
+// readEvents reads from kqueue and converts the received kevents into
+// Event values that it sends down the Events channel.
+func (w *Watcher) readEvents() {
+	eventBuffer := make([]unix.Kevent_t, 10)
+
+loop:
+	for {
+		// See if there is a message on the "done" channel
+		select {
+		case <-w.done:
+			break loop
+		default:
+		}
+
+		// Get new events
+		kevents, err := read(w.kq, eventBuffer, &keventWaitTime)
+		// EINTR is okay, the syscall was interrupted before timeout expired.
+		if err != nil && err != unix.EINTR {
+			select {
+			case w.Errors <- err:
+			case <-w.done:
+				break loop
+			}
+			continue
+		}
+
+		// Flush the events we received to the Events channel
+		for len(kevents) > 0 {
+			kevent := &kevents[0]
+			watchfd := int(kevent.Ident)
+			mask := uint32(kevent.Fflags)
+			w.mu.Lock()
+			path := w.paths[watchfd]
+			w.mu.Unlock()
+			event := newEvent(path.name, mask)
+
+			if path.isDir && !(event.Op&Remove == Remove) {
+				// Double check to make sure the directory exists. This can happen when
+				// we do a rm -fr on a recursively watched folders and we receive a
+				// modification event first but the folder has been deleted and later
+				// receive the delete event
+				if _, err := os.Lstat(event.Name); os.IsNotExist(err) {
+					// mark is as delete event
+					event.Op |= Remove
+				}
+			}
+
+			if event.Op&Rename == Rename || event.Op&Remove == Remove {
+				w.Remove(event.Name)
+				w.mu.Lock()
+				delete(w.fileExists, event.Name)
+				w.mu.Unlock()
+			}
+
+			if path.isDir && event.Op&Write == Write && !(event.Op&Remove == Remove) {
+				w.sendDirectoryChangeEvents(event.Name)
+			} else {
+				// Send the event on the Events channel.
+				select {
+				case w.Events <- event:
+				case <-w.done:
+					break loop
+				}
+			}
+
+			if event.Op&Remove == Remove {
+				// Look for a file that may have overwritten this.
+				// For example, mv f1 f2 will delete f2, then create f2.
+				if path.isDir {
+					fileDir := filepath.Clean(event.Name)
+					w.mu.Lock()
+					_, found := w.watches[fileDir]
+					w.mu.Unlock()
+					if found {
+						// make sure the directory exists before we watch for changes. When we
+						// do a recursive watch and perform rm -fr, the parent directory might
+						// have gone missing, ignore the missing directory and let the
+						// upcoming delete event remove the watch from the parent directory.
+						if _, err := os.Lstat(fileDir); err == nil {
+							w.sendDirectoryChangeEvents(fileDir)
+						}
+					}
+				} else {
+					filePath := filepath.Clean(event.Name)
+					if fileInfo, err := os.Lstat(filePath); err == nil {
+						w.sendFileCreatedEventIfNew(filePath, fileInfo)
+					}
+				}
+			}
+
+			// Move to next event
+			kevents = kevents[1:]
+		}
+	}
+
+	// cleanup
+	err := unix.Close(w.kq)
+	if err != nil {
+		// only way the previous loop breaks is if w.done was closed so we need to async send to w.Errors.
+		select {
+		case w.Errors <- err:
+		default:
+		}
+	}
+	close(w.Events)
+	close(w.Errors)
+}
+
+// newEvent returns an platform-independent Event based on kqueue Fflags.
+func newEvent(name string, mask uint32) Event {
+	e := Event{Name: name}
+	if mask&unix.NOTE_DELETE == unix.NOTE_DELETE {
+		e.Op |= Remove
+	}
+	if mask&unix.NOTE_WRITE == unix.NOTE_WRITE {
+		e.Op |= Write
+	}
+	if mask&unix.NOTE_RENAME == unix.NOTE_RENAME {
+		e.Op |= Rename
+	}
+	if mask&unix.NOTE_ATTRIB == unix.NOTE_ATTRIB {
+		e.Op |= Chmod
+	}
+	return e
+}
+
+func newCreateEvent(name string) Event {
+	return Event{Name: name, Op: Create}
+}
+
+// watchDirectoryFiles to mimic inotify when adding a watch on a directory
+func (w *Watcher) watchDirectoryFiles(dirPath string) error {
+	// Get all files
+	files, err := ioutil.ReadDir(dirPath)
+	if err != nil {
+		return err
+	}
+
+	for _, fileInfo := range files {
+		filePath := filepath.Join(dirPath, fileInfo.Name())
+		filePath, err = w.internalWatch(filePath, fileInfo)
+		if err != nil {
+			return err
+		}
+
+		w.mu.Lock()
+		w.fileExists[filePath] = true
+		w.mu.Unlock()
+	}
+
+	return nil
+}
+
+// sendDirectoryEvents searches the directory for newly created files
+// and sends them over the event channel. This functionality is to have
+// the BSD version of fsnotify match Linux inotify which provides a
+// create event for files created in a watched directory.
+func (w *Watcher) sendDirectoryChangeEvents(dirPath string) {
+	// Get all files
+	files, err := ioutil.ReadDir(dirPath)
+	if err != nil {
+		select {
+		case w.Errors <- err:
+		case <-w.done:
+			return
+		}
+	}
+
+	// Search for new files
+	for _, fileInfo := range files {
+		filePath := filepath.Join(dirPath, fileInfo.Name())
+		err := w.sendFileCreatedEventIfNew(filePath, fileInfo)
+
+		if err != nil {
+			return
+		}
+	}
+}
+
+// sendFileCreatedEvent sends a create event if the file isn't already being tracked.
+func (w *Watcher) sendFileCreatedEventIfNew(filePath string, fileInfo os.FileInfo) (err error) {
+	w.mu.Lock()
+	_, doesExist := w.fileExists[filePath]
+	w.mu.Unlock()
+	if !doesExist {
+		// Send create event
+		select {
+		case w.Events <- newCreateEvent(filePath):
+		case <-w.done:
+			return
+		}
+	}
+
+	// like watchDirectoryFiles (but without doing another ReadDir)
+	filePath, err = w.internalWatch(filePath, fileInfo)
+	if err != nil {
+		return err
+	}
+
+	w.mu.Lock()
+	w.fileExists[filePath] = true
+	w.mu.Unlock()
+
+	return nil
+}
+
+func (w *Watcher) internalWatch(name string, fileInfo os.FileInfo) (string, error) {
+	if fileInfo.IsDir() {
+		// mimic Linux providing delete events for subdirectories
+		// but preserve the flags used if currently watching subdirectory
+		w.mu.Lock()
+		flags := w.dirFlags[name]
+		w.mu.Unlock()
+
+		flags |= unix.NOTE_DELETE | unix.NOTE_RENAME
+		return w.addWatch(name, flags)
+	}
+
+	// watch file to mimic Linux inotify
+	return w.addWatch(name, noteAllEvents)
+}
+
+// kqueue creates a new kernel event queue and returns a descriptor.
+func kqueue() (kq int, err error) {
+	kq, err = unix.Kqueue()
+	if kq == -1 {
+		return kq, err
+	}
+	return kq, nil
+}
+
+// register events with the queue
+func register(kq int, fds []int, flags int, fflags uint32) error {
+	changes := make([]unix.Kevent_t, len(fds))
+
+	for i, fd := range fds {
+		// SetKevent converts int to the platform-specific types:
+		unix.SetKevent(&changes[i], fd, unix.EVFILT_VNODE, flags)
+		changes[i].Fflags = fflags
+	}
+
+	// register the events
+	success, err := unix.Kevent(kq, changes, nil, nil)
+	if success == -1 {
+		return err
+	}
+	return nil
+}
+
+// read retrieves pending events, or waits until an event occurs.
+// A timeout of nil blocks indefinitely, while 0 polls the queue.
+func read(kq int, events []unix.Kevent_t, timeout *unix.Timespec) ([]unix.Kevent_t, error) {
+	n, err := unix.Kevent(kq, nil, events, timeout)
+	if err != nil {
+		return nil, err
+	}
+	return events[0:n], nil
+}
+
+// durationToTimespec prepares a timeout value
+func durationToTimespec(d time.Duration) unix.Timespec {
+	return unix.NsecToTimespec(d.Nanoseconds())
+}

vendor/github.com/fsnotify/fsnotify/open_mode_bsd.go

@@ -0,0 +1,11 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build freebsd openbsd netbsd dragonfly
+
+package fsnotify
+
+import "golang.org/x/sys/unix"
+
+const openMode = unix.O_NONBLOCK | unix.O_RDONLY | unix.O_CLOEXEC

vendor/github.com/fsnotify/fsnotify/open_mode_darwin.go

@@ -0,0 +1,12 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build darwin
+
+package fsnotify
+
+import "golang.org/x/sys/unix"
+
+// note: this constant is not defined on BSD
+const openMode = unix.O_EVTONLY | unix.O_CLOEXEC

vendor/github.com/fsnotify/fsnotify/windows.go

@@ -0,0 +1,561 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build windows
+
+package fsnotify
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync"
+	"syscall"
+	"unsafe"
+)
+
+// Watcher watches a set of files, delivering events to a channel.
+type Watcher struct {
+	Events   chan Event
+	Errors   chan error
+	isClosed bool           // Set to true when Close() is first called
+	mu       sync.Mutex     // Map access
+	port     syscall.Handle // Handle to completion port
+	watches  watchMap       // Map of watches (key: i-number)
+	input    chan *input    // Inputs to the reader are sent on this channel
+	quit     chan chan<- error
+}
+
+// NewWatcher establishes a new watcher with the underlying OS and begins waiting for events.
+func NewWatcher() (*Watcher, error) {
+	port, e := syscall.CreateIoCompletionPort(syscall.InvalidHandle, 0, 0, 0)
+	if e != nil {
+		return nil, os.NewSyscallError("CreateIoCompletionPort", e)
+	}
+	w := &Watcher{
+		port:    port,
+		watches: make(watchMap),
+		input:   make(chan *input, 1),
+		Events:  make(chan Event, 50),
+		Errors:  make(chan error),
+		quit:    make(chan chan<- error, 1),
+	}
+	go w.readEvents()
+	return w, nil
+}
+
+// Close removes all watches and closes the events channel.
+func (w *Watcher) Close() error {
+	if w.isClosed {
+		return nil
+	}
+	w.isClosed = true
+
+	// Send "quit" message to the reader goroutine
+	ch := make(chan error)
+	w.quit <- ch
+	if err := w.wakeupReader(); err != nil {
+		return err
+	}
+	return <-ch
+}
+
+// Add starts watching the named file or directory (non-recursively).
+func (w *Watcher) Add(name string) error {
+	if w.isClosed {
+		return errors.New("watcher already closed")
+	}
+	in := &input{
+		op:    opAddWatch,
+		path:  filepath.Clean(name),
+		flags: sysFSALLEVENTS,
+		reply: make(chan error),
+	}
+	w.input <- in
+	if err := w.wakeupReader(); err != nil {
+		return err
+	}
+	return <-in.reply
+}
+
+// Remove stops watching the the named file or directory (non-recursively).
+func (w *Watcher) Remove(name string) error {
+	in := &input{
+		op:    opRemoveWatch,
+		path:  filepath.Clean(name),
+		reply: make(chan error),
+	}
+	w.input <- in
+	if err := w.wakeupReader(); err != nil {
+		return err
+	}
+	return <-in.reply
+}
+
+const (
+	// Options for AddWatch
+	sysFSONESHOT = 0x80000000
+	sysFSONLYDIR = 0x1000000
+
+	// Events
+	sysFSACCESS     = 0x1
+	sysFSALLEVENTS  = 0xfff
+	sysFSATTRIB     = 0x4
+	sysFSCLOSE      = 0x18
+	sysFSCREATE     = 0x100
+	sysFSDELETE     = 0x200
+	sysFSDELETESELF = 0x400
+	sysFSMODIFY     = 0x2
+	sysFSMOVE       = 0xc0
+	sysFSMOVEDFROM  = 0x40
+	sysFSMOVEDTO    = 0x80
+	sysFSMOVESELF   = 0x800
+
+	// Special events
+	sysFSIGNORED   = 0x8000
+	sysFSQOVERFLOW = 0x4000
+)
+
+func newEvent(name string, mask uint32) Event {
+	e := Event{Name: name}
+	if mask&sysFSCREATE == sysFSCREATE || mask&sysFSMOVEDTO == sysFSMOVEDTO {
+		e.Op |= Create
+	}
+	if mask&sysFSDELETE == sysFSDELETE || mask&sysFSDELETESELF == sysFSDELETESELF {
+		e.Op |= Remove
+	}
+	if mask&sysFSMODIFY == sysFSMODIFY {
+		e.Op |= Write
+	}
+	if mask&sysFSMOVE == sysFSMOVE || mask&sysFSMOVESELF == sysFSMOVESELF || mask&sysFSMOVEDFROM == sysFSMOVEDFROM {
+		e.Op |= Rename
+	}
+	if mask&sysFSATTRIB == sysFSATTRIB {
+		e.Op |= Chmod
+	}
+	return e
+}
+
+const (
+	opAddWatch = iota
+	opRemoveWatch
+)
+
+const (
+	provisional uint64 = 1 << (32 + iota)
+)
+
+type input struct {
+	op    int
+	path  string
+	flags uint32
+	reply chan error
+}
+
+type inode struct {
+	handle syscall.Handle
+	volume uint32
+	index  uint64
+}
+
+type watch struct {
+	ov     syscall.Overlapped
+	ino    *inode            // i-number
+	path   string            // Directory path
+	mask   uint64            // Directory itself is being watched with these notify flags
+	names  map[string]uint64 // Map of names being watched and their notify flags
+	rename string            // Remembers the old name while renaming a file
+	buf    [4096]byte
+}
+
+type indexMap map[uint64]*watch
+type watchMap map[uint32]indexMap
+
+func (w *Watcher) wakeupReader() error {
+	e := syscall.PostQueuedCompletionStatus(w.port, 0, 0, nil)
+	if e != nil {
+		return os.NewSyscallError("PostQueuedCompletionStatus", e)
+	}
+	return nil
+}
+
+func getDir(pathname string) (dir string, err error) {
+	attr, e := syscall.GetFileAttributes(syscall.StringToUTF16Ptr(pathname))
+	if e != nil {
+		return "", os.NewSyscallError("GetFileAttributes", e)
+	}
+	if attr&syscall.FILE_ATTRIBUTE_DIRECTORY != 0 {
+		dir = pathname
+	} else {
+		dir, _ = filepath.Split(pathname)
+		dir = filepath.Clean(dir)
+	}
+	return
+}
+
+func getIno(path string) (ino *inode, err error) {
+	h, e := syscall.CreateFile(syscall.StringToUTF16Ptr(path),
+		syscall.FILE_LIST_DIRECTORY,
+		syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE|syscall.FILE_SHARE_DELETE,
+		nil, syscall.OPEN_EXISTING,
+		syscall.FILE_FLAG_BACKUP_SEMANTICS|syscall.FILE_FLAG_OVERLAPPED, 0)
+	if e != nil {
+		return nil, os.NewSyscallError("CreateFile", e)
+	}
+	var fi syscall.ByHandleFileInformation
+	if e = syscall.GetFileInformationByHandle(h, &fi); e != nil {
+		syscall.CloseHandle(h)
+		return nil, os.NewSyscallError("GetFileInformationByHandle", e)
+	}
+	ino = &inode{
+		handle: h,
+		volume: fi.VolumeSerialNumber,
+		index:  uint64(fi.FileIndexHigh)<<32 | uint64(fi.FileIndexLow),
+	}
+	return ino, nil
+}
+
+// Must run within the I/O thread.
+func (m watchMap) get(ino *inode) *watch {
+	if i := m[ino.volume]; i != nil {
+		return i[ino.index]
+	}
+	return nil
+}
+
+// Must run within the I/O thread.
+func (m watchMap) set(ino *inode, watch *watch) {
+	i := m[ino.volume]
+	if i == nil {
+		i = make(indexMap)
+		m[ino.volume] = i
+	}
+	i[ino.index] = watch
+}
+
+// Must run within the I/O thread.
+func (w *Watcher) addWatch(pathname string, flags uint64) error {
+	dir, err := getDir(pathname)
+	if err != nil {
+		return err
+	}
+	if flags&sysFSONLYDIR != 0 && pathname != dir {
+		return nil
+	}
+	ino, err := getIno(dir)
+	if err != nil {
+		return err
+	}
+	w.mu.Lock()
+	watchEntry := w.watches.get(ino)
+	w.mu.Unlock()
+	if watchEntry == nil {
+		if _, e := syscall.CreateIoCompletionPort(ino.handle, w.port, 0, 0); e != nil {
+			syscall.CloseHandle(ino.handle)
+			return os.NewSyscallError("CreateIoCompletionPort", e)
+		}
+		watchEntry = &watch{
+			ino:   ino,
+			path:  dir,
+			names: make(map[string]uint64),
+		}
+		w.mu.Lock()
+		w.watches.set(ino, watchEntry)
+		w.mu.Unlock()
+		flags |= provisional
+	} else {
+		syscall.CloseHandle(ino.handle)
+	}
+	if pathname == dir {
+		watchEntry.mask |= flags
+	} else {
+		watchEntry.names[filepath.Base(pathname)] |= flags
+	}
+	if err = w.startRead(watchEntry); err != nil {
+		return err
+	}
+	if pathname == dir {
+		watchEntry.mask &= ^provisional
+	} else {
+		watchEntry.names[filepath.Base(pathname)] &= ^provisional
+	}
+	return nil
+}
+
+// Must run within the I/O thread.
+func (w *Watcher) remWatch(pathname string) error {
+	dir, err := getDir(pathname)
+	if err != nil {
+		return err
+	}
+	ino, err := getIno(dir)
+	if err != nil {
+		return err
+	}
+	w.mu.Lock()
+	watch := w.watches.get(ino)
+	w.mu.Unlock()
+	if watch == nil {
+		return fmt.Errorf("can't remove non-existent watch for: %s", pathname)
+	}
+	if pathname == dir {
+		w.sendEvent(watch.path, watch.mask&sysFSIGNORED)
+		watch.mask = 0
+	} else {
+		name := filepath.Base(pathname)
+		w.sendEvent(filepath.Join(watch.path, name), watch.names[name]&sysFSIGNORED)
+		delete(watch.names, name)
+	}
+	return w.startRead(watch)
+}
+
+// Must run within the I/O thread.
+func (w *Watcher) deleteWatch(watch *watch) {
+	for name, mask := range watch.names {
+		if mask&provisional == 0 {
+			w.sendEvent(filepath.Join(watch.path, name), mask&sysFSIGNORED)
+		}
+		delete(watch.names, name)
+	}
+	if watch.mask != 0 {
+		if watch.mask&provisional == 0 {
+			w.sendEvent(watch.path, watch.mask&sysFSIGNORED)
+		}
+		watch.mask = 0
+	}
+}
+
+// Must run within the I/O thread.
+func (w *Watcher) startRead(watch *watch) error {
+	if e := syscall.CancelIo(watch.ino.handle); e != nil {
+		w.Errors <- os.NewSyscallError("CancelIo", e)
+		w.deleteWatch(watch)
+	}
+	mask := toWindowsFlags(watch.mask)
+	for _, m := range watch.names {
+		mask |= toWindowsFlags(m)
+	}
+	if mask == 0 {
+		if e := syscall.CloseHandle(watch.ino.handle); e != nil {
+			w.Errors <- os.NewSyscallError("CloseHandle", e)
+		}
+		w.mu.Lock()
+		delete(w.watches[watch.ino.volume], watch.ino.index)
+		w.mu.Unlock()
+		return nil
+	}
+	e := syscall.ReadDirectoryChanges(watch.ino.handle, &watch.buf[0],
+		uint32(unsafe.Sizeof(watch.buf)), false, mask, nil, &watch.ov, 0)
+	if e != nil {
+		err := os.NewSyscallError("ReadDirectoryChanges", e)
+		if e == syscall.ERROR_ACCESS_DENIED && watch.mask&provisional == 0 {
+			// Watched directory was probably removed
+			if w.sendEvent(watch.path, watch.mask&sysFSDELETESELF) {
+				if watch.mask&sysFSONESHOT != 0 {
+					watch.mask = 0
+				}
+			}
+			err = nil
+		}
+		w.deleteWatch(watch)
+		w.startRead(watch)
+		return err
+	}
+	return nil
+}
+
+// readEvents reads from the I/O completion port, converts the
+// received events into Event objects and sends them via the Events channel.
+// Entry point to the I/O thread.
+func (w *Watcher) readEvents() {
+	var (
+		n, key uint32
+		ov     *syscall.Overlapped
+	)
+	runtime.LockOSThread()
+
+	for {
+		e := syscall.GetQueuedCompletionStatus(w.port, &n, &key, &ov, syscall.INFINITE)
+		watch := (*watch)(unsafe.Pointer(ov))
+
+		if watch == nil {
+			select {
+			case ch := <-w.quit:
+				w.mu.Lock()
+				var indexes []indexMap
+				for _, index := range w.watches {
+					indexes = append(indexes, index)
+				}
+				w.mu.Unlock()
+				for _, index := range indexes {
+					for _, watch := range index {
+						w.deleteWatch(watch)
+						w.startRead(watch)
+					}
+				}
+				var err error
+				if e := syscall.CloseHandle(w.port); e != nil {
+					err = os.NewSyscallError("CloseHandle", e)
+				}
+				close(w.Events)
+				close(w.Errors)
+				ch <- err
+				return
+			case in := <-w.input:
+				switch in.op {
+				case opAddWatch:
+					in.reply <- w.addWatch(in.path, uint64(in.flags))
+				case opRemoveWatch:
+					in.reply <- w.remWatch(in.path)
+				}
+			default:
+			}
+			continue
+		}
+
+		switch e {
+		case syscall.ERROR_MORE_DATA:
+			if watch == nil {
+				w.Errors <- errors.New("ERROR_MORE_DATA has unexpectedly null lpOverlapped buffer")
+			} else {
+				// The i/o succeeded but the buffer is full.
+				// In theory we should be building up a full packet.
+				// In practice we can get away with just carrying on.
+				n = uint32(unsafe.Sizeof(watch.buf))
+			}
+		case syscall.ERROR_ACCESS_DENIED:
+			// Watched directory was probably removed
+			w.sendEvent(watch.path, watch.mask&sysFSDELETESELF)
+			w.deleteWatch(watch)
+			w.startRead(watch)
+			continue
+		case syscall.ERROR_OPERATION_ABORTED:
+			// CancelIo was called on this handle
+			continue
+		default:
+			w.Errors <- os.NewSyscallError("GetQueuedCompletionPort", e)
+			continue
+		case nil:
+		}
+
+		var offset uint32
+		for {
+			if n == 0 {
+				w.Events <- newEvent("", sysFSQOVERFLOW)
+				w.Errors <- errors.New("short read in readEvents()")
+				break
+			}
+
+			// Point "raw" to the event in the buffer
+			raw := (*syscall.FileNotifyInformation)(unsafe.Pointer(&watch.buf[offset]))
+			buf := (*[syscall.MAX_PATH]uint16)(unsafe.Pointer(&raw.FileName))
+			name := syscall.UTF16ToString(buf[:raw.FileNameLength/2])
+			fullname := filepath.Join(watch.path, name)
+
+			var mask uint64
+			switch raw.Action {
+			case syscall.FILE_ACTION_REMOVED:
+				mask = sysFSDELETESELF
+			case syscall.FILE_ACTION_MODIFIED:
+				mask = sysFSMODIFY
+			case syscall.FILE_ACTION_RENAMED_OLD_NAME:
+				watch.rename = name
+			case syscall.FILE_ACTION_RENAMED_NEW_NAME:
+				if watch.names[watch.rename] != 0 {
+					watch.names[name] |= watch.names[watch.rename]
+					delete(watch.names, watch.rename)
+					mask = sysFSMOVESELF
+				}
+			}
+
+			sendNameEvent := func() {
+				if w.sendEvent(fullname, watch.names[name]&mask) {
+					if watch.names[name]&sysFSONESHOT != 0 {
+						delete(watch.names, name)
+					}
+				}
+			}
+			if raw.Action != syscall.FILE_ACTION_RENAMED_NEW_NAME {
+				sendNameEvent()
+			}
+			if raw.Action == syscall.FILE_ACTION_REMOVED {
+				w.sendEvent(fullname, watch.names[name]&sysFSIGNORED)
+				delete(watch.names, name)
+			}
+			if w.sendEvent(fullname, watch.mask&toFSnotifyFlags(raw.Action)) {
+				if watch.mask&sysFSONESHOT != 0 {
+					watch.mask = 0
+				}
+			}
+			if raw.Action == syscall.FILE_ACTION_RENAMED_NEW_NAME {
+				fullname = filepath.Join(watch.path, watch.rename)
+				sendNameEvent()
+			}
+
+			// Move to the next event in the buffer
+			if raw.NextEntryOffset == 0 {
+				break
+			}
+			offset += raw.NextEntryOffset
+
+			// Error!
+			if offset >= n {
+				w.Errors <- errors.New("Windows system assumed buffer larger than it is, events have likely been missed.")
+				break
+			}
+		}
+
+		if err := w.startRead(watch); err != nil {
+			w.Errors <- err
+		}
+	}
+}
+
+func (w *Watcher) sendEvent(name string, mask uint64) bool {
+	if mask == 0 {
+		return false
+	}
+	event := newEvent(name, uint32(mask))
+	select {
+	case ch := <-w.quit:
+		w.quit <- ch
+	case w.Events <- event:
+	}
+	return true
+}
+
+func toWindowsFlags(mask uint64) uint32 {
+	var m uint32
+	if mask&sysFSACCESS != 0 {
+		m |= syscall.FILE_NOTIFY_CHANGE_LAST_ACCESS
+	}
+	if mask&sysFSMODIFY != 0 {
+		m |= syscall.FILE_NOTIFY_CHANGE_LAST_WRITE
+	}
+	if mask&sysFSATTRIB != 0 {
+		m |= syscall.FILE_NOTIFY_CHANGE_ATTRIBUTES
+	}
+	if mask&(sysFSMOVE|sysFSCREATE|sysFSDELETE) != 0 {
+		m |= syscall.FILE_NOTIFY_CHANGE_FILE_NAME | syscall.FILE_NOTIFY_CHANGE_DIR_NAME
+	}
+	return m
+}
+
+func toFSnotifyFlags(action uint32) uint64 {
+	switch action {
+	case syscall.FILE_ACTION_ADDED:
+		return sysFSCREATE
+	case syscall.FILE_ACTION_REMOVED:
+		return sysFSDELETE
+	case syscall.FILE_ACTION_MODIFIED:
+		return sysFSMODIFY
+	case syscall.FILE_ACTION_RENAMED_OLD_NAME:
+		return sysFSMOVEDFROM
+	case syscall.FILE_ACTION_RENAMED_NEW_NAME:
+		return sysFSMOVEDTO
+	}
+	return 0
+}

vendor/golang.org/x/net/http2/pipe.go

@@ -17,6 +17,7 @@ type pipe struct {
 	mu       sync.Mutex
 	c        sync.Cond     // c.L lazily initialized to &p.mu
 	b        pipeBuffer    // nil when done reading
+	unread   int           // bytes unread when done
 	err      error         // read error once empty. non-nil means closed.
 	breakErr error         // immediate read error (caller doesn't see rest of b)
 	donec    chan struct{} // closed on error
@@ -33,7 +34,7 @@ func (p *pipe) Len() int {
 	p.mu.Lock()
 	defer p.mu.Unlock()
 	if p.b == nil {
-		return 0
+		return p.unread
 	}
 	return p.b.Len()
 }
@@ -80,6 +81,7 @@ func (p *pipe) Write(d []byte) (n int, err error) {
 		return 0, errClosedPipeWrite
 	}
 	if p.breakErr != nil {
+		p.unread += len(d)
 		return len(d), nil // discard when there is no reader
 	}
 	return p.b.Write(d)
@@ -117,6 +119,9 @@ func (p *pipe) closeWithError(dst *error, err error, fn func()) {
 	}
 	p.readFn = fn
 	if dst == &p.breakErr {
+		if p.b != nil {
+			p.unread += p.b.Len()
+		}
 		p.b = nil
 	}
 	*dst = err

vendor/golang.org/x/net/http2/server.go

@@ -2415,7 +2415,11 @@ func (rws *responseWriterState) writeChunk(p []byte) (n int, err error) {
 			clen = strconv.Itoa(len(p))
 		}
 		_, hasContentType := rws.snapHeader["Content-Type"]
-		if !hasContentType && bodyAllowedForStatus(rws.status) && len(p) > 0 {
+		// If the Content-Encoding is non-blank, we shouldn't
+		// sniff the body. See Issue golang.org/issue/31753.
+		ce := rws.snapHeader.Get("Content-Encoding")
+		hasCE := len(ce) > 0
+		if !hasCE && !hasContentType && bodyAllowedForStatus(rws.status) && len(p) > 0 {
 			ctype = http.DetectContentType(p)
 		}
 		var date string

vendor/golang.org/x/net/http2/transport.go

@@ -603,7 +603,7 @@ func (t *Transport) expectContinueTimeout() time.Duration {
 }
 
 func (t *Transport) NewClientConn(c net.Conn) (*ClientConn, error) {
-	return t.newClientConn(c, false)
+	return t.newClientConn(c, t.disableKeepAlives())
 }
 
 func (t *Transport) newClientConn(c net.Conn, singleUse bool) (*ClientConn, error) {
@@ -1478,7 +1478,29 @@ func (cc *ClientConn) encodeHeaders(req *http.Request, addGzipHeader bool, trail
 				if vv[0] == "" {
 					continue
 				}
-
+			} else if strings.EqualFold(k, "cookie") {
+				// Per 8.1.2.5 To allow for better compression efficiency, the
+				// Cookie header field MAY be split into separate header fields,
+				// each with one or more cookie-pairs.
+				for _, v := range vv {
+					for {
+						p := strings.IndexByte(v, ';')
+						if p < 0 {
+							break
+						}
+						f("cookie", v[:p])
+						p++
+						// strip space after semicolon if any.
+						for p+1 <= len(v) && v[p] == ' ' {
+							p++
+						}
+						v = v[p:]
+					}
+					if len(v) > 0 {
+						f("cookie", v)
+					}
+				}
+				continue
 			}
 
 			for _, v := range vv {

vendor/golang.org/x/net/internal/socks/client.go

@@ -0,0 +1,168 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package socks
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net"
+	"strconv"
+	"time"
+)
+
+var (
+	noDeadline   = time.Time{}
+	aLongTimeAgo = time.Unix(1, 0)
+)
+
+func (d *Dialer) connect(ctx context.Context, c net.Conn, address string) (_ net.Addr, ctxErr error) {
+	host, port, err := splitHostPort(address)
+	if err != nil {
+		return nil, err
+	}
+	if deadline, ok := ctx.Deadline(); ok && !deadline.IsZero() {
+		c.SetDeadline(deadline)
+		defer c.SetDeadline(noDeadline)
+	}
+	if ctx != context.Background() {
+		errCh := make(chan error, 1)
+		done := make(chan struct{})
+		defer func() {
+			close(done)
+			if ctxErr == nil {
+				ctxErr = <-errCh
+			}
+		}()
+		go func() {
+			select {
+			case <-ctx.Done():
+				c.SetDeadline(aLongTimeAgo)
+				errCh <- ctx.Err()
+			case <-done:
+				errCh <- nil
+			}
+		}()
+	}
+
+	b := make([]byte, 0, 6+len(host)) // the size here is just an estimate
+	b = append(b, Version5)
+	if len(d.AuthMethods) == 0 || d.Authenticate == nil {
+		b = append(b, 1, byte(AuthMethodNotRequired))
+	} else {
+		ams := d.AuthMethods
+		if len(ams) > 255 {
+			return nil, errors.New("too many authentication methods")
+		}
+		b = append(b, byte(len(ams)))
+		for _, am := range ams {
+			b = append(b, byte(am))
+		}
+	}
+	if _, ctxErr = c.Write(b); ctxErr != nil {
+		return
+	}
+
+	if _, ctxErr = io.ReadFull(c, b[:2]); ctxErr != nil {
+		return
+	}
+	if b[0] != Version5 {
+		return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0])))
+	}
+	am := AuthMethod(b[1])
+	if am == AuthMethodNoAcceptableMethods {
+		return nil, errors.New("no acceptable authentication methods")
+	}
+	if d.Authenticate != nil {
+		if ctxErr = d.Authenticate(ctx, c, am); ctxErr != nil {
+			return
+		}
+	}
+
+	b = b[:0]
+	b = append(b, Version5, byte(d.cmd), 0)
+	if ip := net.ParseIP(host); ip != nil {
+		if ip4 := ip.To4(); ip4 != nil {
+			b = append(b, AddrTypeIPv4)
+			b = append(b, ip4...)
+		} else if ip6 := ip.To16(); ip6 != nil {
+			b = append(b, AddrTypeIPv6)
+			b = append(b, ip6...)
+		} else {
+			return nil, errors.New("unknown address type")
+		}
+	} else {
+		if len(host) > 255 {
+			return nil, errors.New("FQDN too long")
+		}
+		b = append(b, AddrTypeFQDN)
+		b = append(b, byte(len(host)))
+		b = append(b, host...)
+	}
+	b = append(b, byte(port>>8), byte(port))
+	if _, ctxErr = c.Write(b); ctxErr != nil {
+		return
+	}
+
+	if _, ctxErr = io.ReadFull(c, b[:4]); ctxErr != nil {
+		return
+	}
+	if b[0] != Version5 {
+		return nil, errors.New("unexpected protocol version " + strconv.Itoa(int(b[0])))
+	}
+	if cmdErr := Reply(b[1]); cmdErr != StatusSucceeded {
+		return nil, errors.New("unknown error " + cmdErr.String())
+	}
+	if b[2] != 0 {
+		return nil, errors.New("non-zero reserved field")
+	}
+	l := 2
+	var a Addr
+	switch b[3] {
+	case AddrTypeIPv4:
+		l += net.IPv4len
+		a.IP = make(net.IP, net.IPv4len)
+	case AddrTypeIPv6:
+		l += net.IPv6len
+		a.IP = make(net.IP, net.IPv6len)
+	case AddrTypeFQDN:
+		if _, err := io.ReadFull(c, b[:1]); err != nil {
+			return nil, err
+		}
+		l += int(b[0])
+	default:
+		return nil, errors.New("unknown address type " + strconv.Itoa(int(b[3])))
+	}
+	if cap(b) < l {
+		b = make([]byte, l)
+	} else {
+		b = b[:l]
+	}
+	if _, ctxErr = io.ReadFull(c, b); ctxErr != nil {
+		return
+	}
+	if a.IP != nil {
+		copy(a.IP, b)
+	} else {
+		a.Name = string(b[:len(b)-2])
+	}
+	a.Port = int(b[len(b)-2])<<8 | int(b[len(b)-1])
+	return &a, nil
+}
+
+func splitHostPort(address string) (string, int, error) {
+	host, port, err := net.SplitHostPort(address)
+	if err != nil {
+		return "", 0, err
+	}
+	portnum, err := strconv.Atoi(port)
+	if err != nil {
+		return "", 0, err
+	}
+	if 1 > portnum || portnum > 0xffff {
+		return "", 0, errors.New("port number out of range " + port)
+	}
+	return host, portnum, nil
+}

vendor/golang.org/x/net/internal/socks/socks.go

@@ -0,0 +1,317 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package socks provides a SOCKS version 5 client implementation.
+//
+// SOCKS protocol version 5 is defined in RFC 1928.
+// Username/Password authentication for SOCKS version 5 is defined in
+// RFC 1929.
+package socks
+
+import (
+	"context"
+	"errors"
+	"io"
+	"net"
+	"strconv"
+)
+
+// A Command represents a SOCKS command.
+type Command int
+
+func (cmd Command) String() string {
+	switch cmd {
+	case CmdConnect:
+		return "socks connect"
+	case cmdBind:
+		return "socks bind"
+	default:
+		return "socks " + strconv.Itoa(int(cmd))
+	}
+}
+
+// An AuthMethod represents a SOCKS authentication method.
+type AuthMethod int
+
+// A Reply represents a SOCKS command reply code.
+type Reply int
+
+func (code Reply) String() string {
+	switch code {
+	case StatusSucceeded:
+		return "succeeded"
+	case 0x01:
+		return "general SOCKS server failure"
+	case 0x02:
+		return "connection not allowed by ruleset"
+	case 0x03:
+		return "network unreachable"
+	case 0x04:
+		return "host unreachable"
+	case 0x05:
+		return "connection refused"
+	case 0x06:
+		return "TTL expired"
+	case 0x07:
+		return "command not supported"
+	case 0x08:
+		return "address type not supported"
+	default:
+		return "unknown code: " + strconv.Itoa(int(code))
+	}
+}
+
+// Wire protocol constants.
+const (
+	Version5 = 0x05
+
+	AddrTypeIPv4 = 0x01
+	AddrTypeFQDN = 0x03
+	AddrTypeIPv6 = 0x04
+
+	CmdConnect Command = 0x01 // establishes an active-open forward proxy connection
+	cmdBind    Command = 0x02 // establishes a passive-open forward proxy connection
+
+	AuthMethodNotRequired         AuthMethod = 0x00 // no authentication required
+	AuthMethodUsernamePassword    AuthMethod = 0x02 // use username/password
+	AuthMethodNoAcceptableMethods AuthMethod = 0xff // no acceptable authentication methods
+
+	StatusSucceeded Reply = 0x00
+)
+
+// An Addr represents a SOCKS-specific address.
+// Either Name or IP is used exclusively.
+type Addr struct {
+	Name string // fully-qualified domain name
+	IP   net.IP
+	Port int
+}
+
+func (a *Addr) Network() string { return "socks" }
+
+func (a *Addr) String() string {
+	if a == nil {
+		return "<nil>"
+	}
+	port := strconv.Itoa(a.Port)
+	if a.IP == nil {
+		return net.JoinHostPort(a.Name, port)
+	}
+	return net.JoinHostPort(a.IP.String(), port)
+}
+
+// A Conn represents a forward proxy connection.
+type Conn struct {
+	net.Conn
+
+	boundAddr net.Addr
+}
+
+// BoundAddr returns the address assigned by the proxy server for
+// connecting to the command target address from the proxy server.
+func (c *Conn) BoundAddr() net.Addr {
+	if c == nil {
+		return nil
+	}
+	return c.boundAddr
+}
+
+// A Dialer holds SOCKS-specific options.
+type Dialer struct {
+	cmd          Command // either CmdConnect or cmdBind
+	proxyNetwork string  // network between a proxy server and a client
+	proxyAddress string  // proxy server address
+
+	// ProxyDial specifies the optional dial function for
+	// establishing the transport connection.
+	ProxyDial func(context.Context, string, string) (net.Conn, error)
+
+	// AuthMethods specifies the list of request authentication
+	// methods.
+	// If empty, SOCKS client requests only AuthMethodNotRequired.
+	AuthMethods []AuthMethod
+
+	// Authenticate specifies the optional authentication
+	// function. It must be non-nil when AuthMethods is not empty.
+	// It must return an error when the authentication is failed.
+	Authenticate func(context.Context, io.ReadWriter, AuthMethod) error
+}
+
+// DialContext connects to the provided address on the provided
+// network.
+//
+// The returned error value may be a net.OpError. When the Op field of
+// net.OpError contains "socks", the Source field contains a proxy
+// server address and the Addr field contains a command target
+// address.
+//
+// See func Dial of the net package of standard library for a
+// description of the network and address parameters.
+func (d *Dialer) DialContext(ctx context.Context, network, address string) (net.Conn, error) {
+	if err := d.validateTarget(network, address); err != nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	if ctx == nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")}
+	}
+	var err error
+	var c net.Conn
+	if d.ProxyDial != nil {
+		c, err = d.ProxyDial(ctx, d.proxyNetwork, d.proxyAddress)
+	} else {
+		var dd net.Dialer
+		c, err = dd.DialContext(ctx, d.proxyNetwork, d.proxyAddress)
+	}
+	if err != nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	a, err := d.connect(ctx, c, address)
+	if err != nil {
+		c.Close()
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	return &Conn{Conn: c, boundAddr: a}, nil
+}
+
+// DialWithConn initiates a connection from SOCKS server to the target
+// network and address using the connection c that is already
+// connected to the SOCKS server.
+//
+// It returns the connection's local address assigned by the SOCKS
+// server.
+func (d *Dialer) DialWithConn(ctx context.Context, c net.Conn, network, address string) (net.Addr, error) {
+	if err := d.validateTarget(network, address); err != nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	if ctx == nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: errors.New("nil context")}
+	}
+	a, err := d.connect(ctx, c, address)
+	if err != nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	return a, nil
+}
+
+// Dial connects to the provided address on the provided network.
+//
+// Unlike DialContext, it returns a raw transport connection instead
+// of a forward proxy connection.
+//
+// Deprecated: Use DialContext or DialWithConn instead.
+func (d *Dialer) Dial(network, address string) (net.Conn, error) {
+	if err := d.validateTarget(network, address); err != nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	var err error
+	var c net.Conn
+	if d.ProxyDial != nil {
+		c, err = d.ProxyDial(context.Background(), d.proxyNetwork, d.proxyAddress)
+	} else {
+		c, err = net.Dial(d.proxyNetwork, d.proxyAddress)
+	}
+	if err != nil {
+		proxy, dst, _ := d.pathAddrs(address)
+		return nil, &net.OpError{Op: d.cmd.String(), Net: network, Source: proxy, Addr: dst, Err: err}
+	}
+	if _, err := d.DialWithConn(context.Background(), c, network, address); err != nil {
+		c.Close()
+		return nil, err
+	}
+	return c, nil
+}
+
+func (d *Dialer) validateTarget(network, address string) error {
+	switch network {
+	case "tcp", "tcp6", "tcp4":
+	default:
+		return errors.New("network not implemented")
+	}
+	switch d.cmd {
+	case CmdConnect, cmdBind:
+	default:
+		return errors.New("command not implemented")
+	}
+	return nil
+}
+
+func (d *Dialer) pathAddrs(address string) (proxy, dst net.Addr, err error) {
+	for i, s := range []string{d.proxyAddress, address} {
+		host, port, err := splitHostPort(s)
+		if err != nil {
+			return nil, nil, err
+		}
+		a := &Addr{Port: port}
+		a.IP = net.ParseIP(host)
+		if a.IP == nil {
+			a.Name = host
+		}
+		if i == 0 {
+			proxy = a
+		} else {
+			dst = a
+		}
+	}
+	return
+}
+
+// NewDialer returns a new Dialer that dials through the provided
+// proxy server's network and address.
+func NewDialer(network, address string) *Dialer {
+	return &Dialer{proxyNetwork: network, proxyAddress: address, cmd: CmdConnect}
+}
+
+const (
+	authUsernamePasswordVersion = 0x01
+	authStatusSucceeded         = 0x00
+)
+
+// UsernamePassword are the credentials for the username/password
+// authentication method.
+type UsernamePassword struct {
+	Username string
+	Password string
+}
+
+// Authenticate authenticates a pair of username and password with the
+// proxy server.
+func (up *UsernamePassword) Authenticate(ctx context.Context, rw io.ReadWriter, auth AuthMethod) error {
+	switch auth {
+	case AuthMethodNotRequired:
+		return nil
+	case AuthMethodUsernamePassword:
+		if len(up.Username) == 0 || len(up.Username) > 255 || len(up.Password) == 0 || len(up.Password) > 255 {
+			return errors.New("invalid username/password")
+		}
+		b := []byte{authUsernamePasswordVersion}
+		b = append(b, byte(len(up.Username)))
+		b = append(b, up.Username...)
+		b = append(b, byte(len(up.Password)))
+		b = append(b, up.Password...)
+		// TODO(mikio): handle IO deadlines and cancelation if
+		// necessary
+		if _, err := rw.Write(b); err != nil {
+			return err
+		}
+		if _, err := io.ReadFull(rw, b[:2]); err != nil {
+			return err
+		}
+		if b[0] != authUsernamePasswordVersion {
+			return errors.New("invalid username/password version")
+		}
+		if b[1] != authStatusSucceeded {
+			return errors.New("username/password authentication failed")
+		}
+		return nil
+	}
+	return errors.New("unsupported authentication method " + strconv.Itoa(int(auth)))
+}

vendor/golang.org/x/net/proxy/dial.go

@@ -0,0 +1,54 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proxy
+
+import (
+	"context"
+	"net"
+)
+
+// A ContextDialer dials using a context.
+type ContextDialer interface {
+	DialContext(ctx context.Context, network, address string) (net.Conn, error)
+}
+
+// Dial works like DialContext on net.Dialer but using a dialer returned by FromEnvironment.
+//
+// The passed ctx is only used for returning the Conn, not the lifetime of the Conn.
+//
+// Custom dialers (registered via RegisterDialerType) that do not implement ContextDialer
+// can leak a goroutine for as long as it takes the underlying Dialer implementation to timeout.
+//
+// A Conn returned from a successful Dial after the context has been cancelled will be immediately closed.
+func Dial(ctx context.Context, network, address string) (net.Conn, error) {
+	d := FromEnvironment()
+	if xd, ok := d.(ContextDialer); ok {
+		return xd.DialContext(ctx, network, address)
+	}
+	return dialContext(ctx, d, network, address)
+}
+
+// WARNING: this can leak a goroutine for as long as the underlying Dialer implementation takes to timeout
+// A Conn returned from a successful Dial after the context has been cancelled will be immediately closed.
+func dialContext(ctx context.Context, d Dialer, network, address string) (net.Conn, error) {
+	var (
+		conn net.Conn
+		done = make(chan struct{}, 1)
+		err  error
+	)
+	go func() {
+		conn, err = d.Dial(network, address)
+		close(done)
+		if conn != nil && ctx.Err() != nil {
+			conn.Close()
+		}
+	}()
+	select {
+	case <-ctx.Done():
+		err = ctx.Err()
+	case <-done:
+	}
+	return conn, err
+}

vendor/golang.org/x/net/proxy/direct.go

@@ -0,0 +1,31 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proxy
+
+import (
+	"context"
+	"net"
+)
+
+type direct struct{}
+
+// Direct implements Dialer by making network connections directly using net.Dial or net.DialContext.
+var Direct = direct{}
+
+var (
+	_ Dialer        = Direct
+	_ ContextDialer = Direct
+)
+
+// Dial directly invokes net.Dial with the supplied parameters.
+func (direct) Dial(network, addr string) (net.Conn, error) {
+	return net.Dial(network, addr)
+}
+
+// DialContext instantiates a net.Dialer and invokes its DialContext receiver with the supplied parameters.
+func (direct) DialContext(ctx context.Context, network, addr string) (net.Conn, error) {
+	var d net.Dialer
+	return d.DialContext(ctx, network, addr)
+}

vendor/golang.org/x/net/proxy/per_host.go

@@ -0,0 +1,155 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proxy
+
+import (
+	"context"
+	"net"
+	"strings"
+)
+
+// A PerHost directs connections to a default Dialer unless the host name
+// requested matches one of a number of exceptions.
+type PerHost struct {
+	def, bypass Dialer
+
+	bypassNetworks []*net.IPNet
+	bypassIPs      []net.IP
+	bypassZones    []string
+	bypassHosts    []string
+}
+
+// NewPerHost returns a PerHost Dialer that directs connections to either
+// defaultDialer or bypass, depending on whether the connection matches one of
+// the configured rules.
+func NewPerHost(defaultDialer, bypass Dialer) *PerHost {
+	return &PerHost{
+		def:    defaultDialer,
+		bypass: bypass,
+	}
+}
+
+// Dial connects to the address addr on the given network through either
+// defaultDialer or bypass.
+func (p *PerHost) Dial(network, addr string) (c net.Conn, err error) {
+	host, _, err := net.SplitHostPort(addr)
+	if err != nil {
+		return nil, err
+	}
+
+	return p.dialerForRequest(host).Dial(network, addr)
+}
+
+// DialContext connects to the address addr on the given network through either
+// defaultDialer or bypass.
+func (p *PerHost) DialContext(ctx context.Context, network, addr string) (c net.Conn, err error) {
+	host, _, err := net.SplitHostPort(addr)
+	if err != nil {
+		return nil, err
+	}
+	d := p.dialerForRequest(host)
+	if x, ok := d.(ContextDialer); ok {
+		return x.DialContext(ctx, network, addr)
+	}
+	return dialContext(ctx, d, network, addr)
+}
+
+func (p *PerHost) dialerForRequest(host string) Dialer {
+	if ip := net.ParseIP(host); ip != nil {
+		for _, net := range p.bypassNetworks {
+			if net.Contains(ip) {
+				return p.bypass
+			}
+		}
+		for _, bypassIP := range p.bypassIPs {
+			if bypassIP.Equal(ip) {
+				return p.bypass
+			}
+		}
+		return p.def
+	}
+
+	for _, zone := range p.bypassZones {
+		if strings.HasSuffix(host, zone) {
+			return p.bypass
+		}
+		if host == zone[1:] {
+			// For a zone ".example.com", we match "example.com"
+			// too.
+			return p.bypass
+		}
+	}
+	for _, bypassHost := range p.bypassHosts {
+		if bypassHost == host {
+			return p.bypass
+		}
+	}
+	return p.def
+}
+
+// AddFromString parses a string that contains comma-separated values
+// specifying hosts that should use the bypass proxy. Each value is either an
+// IP address, a CIDR range, a zone (*.example.com) or a host name
+// (localhost). A best effort is made to parse the string and errors are
+// ignored.
+func (p *PerHost) AddFromString(s string) {
+	hosts := strings.Split(s, ",")
+	for _, host := range hosts {
+		host = strings.TrimSpace(host)
+		if len(host) == 0 {
+			continue
+		}
+		if strings.Contains(host, "/") {
+			// We assume that it's a CIDR address like 127.0.0.0/8
+			if _, net, err := net.ParseCIDR(host); err == nil {
+				p.AddNetwork(net)
+			}
+			continue
+		}
+		if ip := net.ParseIP(host); ip != nil {
+			p.AddIP(ip)
+			continue
+		}
+		if strings.HasPrefix(host, "*.") {
+			p.AddZone(host[1:])
+			continue
+		}
+		p.AddHost(host)
+	}
+}
+
+// AddIP specifies an IP address that will use the bypass proxy. Note that
+// this will only take effect if a literal IP address is dialed. A connection
+// to a named host will never match an IP.
+func (p *PerHost) AddIP(ip net.IP) {
+	p.bypassIPs = append(p.bypassIPs, ip)
+}
+
+// AddNetwork specifies an IP range that will use the bypass proxy. Note that
+// this will only take effect if a literal IP address is dialed. A connection
+// to a named host will never match.
+func (p *PerHost) AddNetwork(net *net.IPNet) {
+	p.bypassNetworks = append(p.bypassNetworks, net)
+}
+
+// AddZone specifies a DNS suffix that will use the bypass proxy. A zone of
+// "example.com" matches "example.com" and all of its subdomains.
+func (p *PerHost) AddZone(zone string) {
+	if strings.HasSuffix(zone, ".") {
+		zone = zone[:len(zone)-1]
+	}
+	if !strings.HasPrefix(zone, ".") {
+		zone = "." + zone
+	}
+	p.bypassZones = append(p.bypassZones, zone)
+}
+
+// AddHost specifies a host name that will use the bypass proxy.
+func (p *PerHost) AddHost(host string) {
+	if strings.HasSuffix(host, ".") {
+		host = host[:len(host)-1]
+	}
+	p.bypassHosts = append(p.bypassHosts, host)
+}

vendor/golang.org/x/net/proxy/proxy.go

@@ -0,0 +1,149 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package proxy provides support for a variety of protocols to proxy network
+// data.
+package proxy // import "golang.org/x/net/proxy"
+
+import (
+	"errors"
+	"net"
+	"net/url"
+	"os"
+	"sync"
+)
+
+// A Dialer is a means to establish a connection.
+// Custom dialers should also implement ContextDialer.
+type Dialer interface {
+	// Dial connects to the given address via the proxy.
+	Dial(network, addr string) (c net.Conn, err error)
+}
+
+// Auth contains authentication parameters that specific Dialers may require.
+type Auth struct {
+	User, Password string
+}
+
+// FromEnvironment returns the dialer specified by the proxy-related
+// variables in the environment and makes underlying connections
+// directly.
+func FromEnvironment() Dialer {
+	return FromEnvironmentUsing(Direct)
+}
+
+// FromEnvironmentUsing returns the dialer specify by the proxy-related
+// variables in the environment and makes underlying connections
+// using the provided forwarding Dialer (for instance, a *net.Dialer
+// with desired configuration).
+func FromEnvironmentUsing(forward Dialer) Dialer {
+	allProxy := allProxyEnv.Get()
+	if len(allProxy) == 0 {
+		return forward
+	}
+
+	proxyURL, err := url.Parse(allProxy)
+	if err != nil {
+		return forward
+	}
+	proxy, err := FromURL(proxyURL, forward)
+	if err != nil {
+		return forward
+	}
+
+	noProxy := noProxyEnv.Get()
+	if len(noProxy) == 0 {
+		return proxy
+	}
+
+	perHost := NewPerHost(proxy, forward)
+	perHost.AddFromString(noProxy)
+	return perHost
+}
+
+// proxySchemes is a map from URL schemes to a function that creates a Dialer
+// from a URL with such a scheme.
+var proxySchemes map[string]func(*url.URL, Dialer) (Dialer, error)
+
+// RegisterDialerType takes a URL scheme and a function to generate Dialers from
+// a URL with that scheme and a forwarding Dialer. Registered schemes are used
+// by FromURL.
+func RegisterDialerType(scheme string, f func(*url.URL, Dialer) (Dialer, error)) {
+	if proxySchemes == nil {
+		proxySchemes = make(map[string]func(*url.URL, Dialer) (Dialer, error))
+	}
+	proxySchemes[scheme] = f
+}
+
+// FromURL returns a Dialer given a URL specification and an underlying
+// Dialer for it to make network requests.
+func FromURL(u *url.URL, forward Dialer) (Dialer, error) {
+	var auth *Auth
+	if u.User != nil {
+		auth = new(Auth)
+		auth.User = u.User.Username()
+		if p, ok := u.User.Password(); ok {
+			auth.Password = p
+		}
+	}
+
+	switch u.Scheme {
+	case "socks5", "socks5h":
+		addr := u.Hostname()
+		port := u.Port()
+		if port == "" {
+			port = "1080"
+		}
+		return SOCKS5("tcp", net.JoinHostPort(addr, port), auth, forward)
+	}
+
+	// If the scheme doesn't match any of the built-in schemes, see if it
+	// was registered by another package.
+	if proxySchemes != nil {
+		if f, ok := proxySchemes[u.Scheme]; ok {
+			return f(u, forward)
+		}
+	}
+
+	return nil, errors.New("proxy: unknown scheme: " + u.Scheme)
+}
+
+var (
+	allProxyEnv = &envOnce{
+		names: []string{"ALL_PROXY", "all_proxy"},
+	}
+	noProxyEnv = &envOnce{
+		names: []string{"NO_PROXY", "no_proxy"},
+	}
+)
+
+// envOnce looks up an environment variable (optionally by multiple
+// names) once. It mitigates expensive lookups on some platforms
+// (e.g. Windows).
+// (Borrowed from net/http/transport.go)
+type envOnce struct {
+	names []string
+	once  sync.Once
+	val   string
+}
+
+func (e *envOnce) Get() string {
+	e.once.Do(e.init)
+	return e.val
+}
+
+func (e *envOnce) init() {
+	for _, n := range e.names {
+		e.val = os.Getenv(n)
+		if e.val != "" {
+			return
+		}
+	}
+}
+
+// reset is used by tests
+func (e *envOnce) reset() {
+	e.once = sync.Once{}
+	e.val = ""
+}

vendor/golang.org/x/net/proxy/socks5.go

@@ -0,0 +1,42 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package proxy
+
+import (
+	"context"
+	"net"
+
+	"golang.org/x/net/internal/socks"
+)
+
+// SOCKS5 returns a Dialer that makes SOCKSv5 connections to the given
+// address with an optional username and password.
+// See RFC 1928 and RFC 1929.
+func SOCKS5(network, address string, auth *Auth, forward Dialer) (Dialer, error) {
+	d := socks.NewDialer(network, address)
+	if forward != nil {
+		if f, ok := forward.(ContextDialer); ok {
+			d.ProxyDial = func(ctx context.Context, network string, address string) (net.Conn, error) {
+				return f.DialContext(ctx, network, address)
+			}
+		} else {
+			d.ProxyDial = func(ctx context.Context, network string, address string) (net.Conn, error) {
+				return dialContext(ctx, forward, network, address)
+			}
+		}
+	}
+	if auth != nil {
+		up := socks.UsernamePassword{
+			Username: auth.User,
+			Password: auth.Password,
+		}
+		d.AuthMethods = []socks.AuthMethod{
+			socks.AuthMethodNotRequired,
+			socks.AuthMethodUsernamePassword,
+		}
+		d.Authenticate = up.Authenticate
+	}
+	return d, nil
+}

vendor/golang.org/x/sys/unix/sockcmsg_dragonfly.go

@@ -0,0 +1,16 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package unix
+
+// Round the length of a raw sockaddr up to align it properly.
+func cmsgAlignOf(salen int) int {
+	salign := SizeofPtr
+	if SizeofPtr == 8 && !supportsABI(_dragonflyABIChangeVersion) {
+		// 64-bit Dragonfly before the September 2019 ABI changes still requires
+		// 32-bit aligned access to network subsystem.
+		salign = 4
+	}
+	return (salen + salign - 1) & ^(salign - 1)
+}

vendor/golang.org/x/sys/unix/sockcmsg_linux.go

@@ -17,7 +17,7 @@ func UnixCredentials(ucred *Ucred) []byte {
 	h.Level = SOL_SOCKET
 	h.Type = SCM_CREDENTIALS
 	h.SetLen(CmsgLen(SizeofUcred))
-	*((*Ucred)(cmsgData(h))) = *ucred
+	*(*Ucred)(h.data(0)) = *ucred
 	return b
 }
 

vendor/golang.org/x/sys/unix/sockcmsg_unix.go

@@ -9,35 +9,9 @@
 package unix
 
 import (
-	"runtime"
 	"unsafe"
 )
 
-// Round the length of a raw sockaddr up to align it properly.
-func cmsgAlignOf(salen int) int {
-	salign := SizeofPtr
-
-	switch runtime.GOOS {
-	case "aix":
-		// There is no alignment on AIX.
-		salign = 1
-	case "darwin", "dragonfly", "solaris", "illumos":
-		// NOTE: It seems like 64-bit Darwin, DragonFly BSD,
-		// illumos, and Solaris kernels still require 32-bit
-		// aligned access to network subsystem.
-		if SizeofPtr == 8 {
-			salign = 4
-		}
-	case "netbsd", "openbsd":
-		// NetBSD and OpenBSD armv7 require 64-bit alignment.
-		if runtime.GOARCH == "arm" {
-			salign = 8
-		}
-	}
-
-	return (salen + salign - 1) & ^(salign - 1)
-}
-
 // CmsgLen returns the value to store in the Len field of the Cmsghdr
 // structure, taking into account any necessary alignment.
 func CmsgLen(datalen int) int {
@@ -50,8 +24,8 @@ func CmsgSpace(datalen int) int {
 	return cmsgAlignOf(SizeofCmsghdr) + cmsgAlignOf(datalen)
 }
 
-func cmsgData(h *Cmsghdr) unsafe.Pointer {
-	return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(SizeofCmsghdr)))
+func (h *Cmsghdr) data(offset uintptr) unsafe.Pointer {
+	return unsafe.Pointer(uintptr(unsafe.Pointer(h)) + uintptr(cmsgAlignOf(SizeofCmsghdr)) + offset)
 }
 
 // SocketControlMessage represents a socket control message.
@@ -94,10 +68,8 @@ func UnixRights(fds ...int) []byte {
 	h.Level = SOL_SOCKET
 	h.Type = SCM_RIGHTS
 	h.SetLen(CmsgLen(datalen))
-	data := cmsgData(h)
-	for _, fd := range fds {
-		*(*int32)(data) = int32(fd)
-		data = unsafe.Pointer(uintptr(data) + 4)
+	for i, fd := range fds {
+		*(*int32)(h.data(4 * uintptr(i))) = int32(fd)
 	}
 	return b
 }

vendor/golang.org/x/sys/unix/sockcmsg_unix_other.go

@@ -0,0 +1,38 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build aix darwin freebsd linux netbsd openbsd solaris
+
+package unix
+
+import (
+	"runtime"
+)
+
+// Round the length of a raw sockaddr up to align it properly.
+func cmsgAlignOf(salen int) int {
+	salign := SizeofPtr
+
+	// dragonfly needs to check ABI version at runtime, see cmsgAlignOf in
+	// sockcmsg_dragonfly.go
+	switch runtime.GOOS {
+	case "aix":
+		// There is no alignment on AIX.
+		salign = 1
+	case "darwin", "illumos", "solaris":
+		// NOTE: It seems like 64-bit Darwin, Illumos and Solaris
+		// kernels still require 32-bit aligned access to network
+		// subsystem.
+		if SizeofPtr == 8 {
+			salign = 4
+		}
+	case "netbsd", "openbsd":
+		// NetBSD and OpenBSD armv7 require 64-bit alignment.
+		if runtime.GOARCH == "arm" {
+			salign = 8
+		}
+	}
+
+	return (salen + salign - 1) & ^(salign - 1)
+}

vendor/golang.org/x/sys/unix/syscall_bsd.go

@@ -237,7 +237,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 				break
 			}
 		}
-		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
 		sa.Name = string(bytes)
 		return sa, nil
 

vendor/golang.org/x/sys/unix/syscall_dragonfly.go

@@ -12,9 +12,25 @@
 
 package unix
 
-import "unsafe"
+import (
+	"sync"
+	"unsafe"
+)
 
-//sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error) = SYS___SYSCTL
+// See version list in https://github.com/DragonFlyBSD/DragonFlyBSD/blob/master/sys/sys/param.h
+var (
+	osreldateOnce sync.Once
+	osreldate     uint32
+)
+
+// First __DragonFly_version after September 2019 ABI changes
+// http://lists.dragonflybsd.org/pipermail/users/2019-September/358280.html
+const _dragonflyABIChangeVersion = 500705
+
+func supportsABI(ver uint32) bool {
+	osreldateOnce.Do(func() { osreldate, _ = SysctlUint32("kern.osreldate") })
+	return osreldate >= ver
+}
 
 // SockaddrDatalink implements the Sockaddr interface for AF_LINK type sockets.
 type SockaddrDatalink struct {

vendor/golang.org/x/sys/unix/syscall_linux.go

@@ -884,7 +884,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 		for n < len(pp.Path) && pp.Path[n] != 0 {
 			n++
 		}
-		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
 		sa.Name = string(bytes)
 		return sa, nil
 

vendor/golang.org/x/sys/unix/syscall_solaris.go

@@ -391,7 +391,7 @@ func anyToSockaddr(fd int, rsa *RawSockaddrAny) (Sockaddr, error) {
 		for n < len(pp.Path) && pp.Path[n] != 0 {
 			n++
 		}
-		bytes := (*[10000]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
+		bytes := (*[len(pp.Path)]byte)(unsafe.Pointer(&pp.Path[0]))[0:n]
 		sa.Name = string(bytes)
 		return sa, nil
 

vendor/golang.org/x/sys/unix/ztypes_linux_386.go

@@ -599,22 +599,6 @@ const (
 	RTN_THROW               = 0x9
 	RTN_NAT                 = 0xa
 	RTN_XRESOLVE            = 0xb
-	RTNLGRP_NONE            = 0x0
-	RTNLGRP_LINK            = 0x1
-	RTNLGRP_NOTIFY          = 0x2
-	RTNLGRP_NEIGH           = 0x3
-	RTNLGRP_TC              = 0x4
-	RTNLGRP_IPV4_IFADDR     = 0x5
-	RTNLGRP_IPV4_MROUTE     = 0x6
-	RTNLGRP_IPV4_ROUTE      = 0x7
-	RTNLGRP_IPV4_RULE       = 0x8
-	RTNLGRP_IPV6_IFADDR     = 0x9
-	RTNLGRP_IPV6_MROUTE     = 0xa
-	RTNLGRP_IPV6_ROUTE      = 0xb
-	RTNLGRP_IPV6_IFINFO     = 0xc
-	RTNLGRP_IPV6_PREFIX     = 0x12
-	RTNLGRP_IPV6_RULE       = 0x13
-	RTNLGRP_ND_USEROPT      = 0x14
 	SizeofNlMsghdr          = 0x10
 	SizeofNlMsgerr          = 0x14
 	SizeofRtGenmsg          = 0x1
@@ -2484,6 +2468,42 @@ const (
 	BPF_FD_TYPE_URETPROBE               = 0x5
 )
 
+const (
+	RTNLGRP_NONE          = 0x0
+	RTNLGRP_LINK          = 0x1
+	RTNLGRP_NOTIFY        = 0x2
+	RTNLGRP_NEIGH         = 0x3
+	RTNLGRP_TC            = 0x4
+	RTNLGRP_IPV4_IFADDR   = 0x5
+	RTNLGRP_IPV4_MROUTE   = 0x6
+	RTNLGRP_IPV4_ROUTE    = 0x7
+	RTNLGRP_IPV4_RULE     = 0x8
+	RTNLGRP_IPV6_IFADDR   = 0x9
+	RTNLGRP_IPV6_MROUTE   = 0xa
+	RTNLGRP_IPV6_ROUTE    = 0xb
+	RTNLGRP_IPV6_IFINFO   = 0xc
+	RTNLGRP_DECnet_IFADDR = 0xd
+	RTNLGRP_NOP2          = 0xe
+	RTNLGRP_DECnet_ROUTE  = 0xf
+	RTNLGRP_DECnet_RULE   = 0x10
+	RTNLGRP_NOP4          = 0x11
+	RTNLGRP_IPV6_PREFIX   = 0x12
+	RTNLGRP_IPV6_RULE     = 0x13
+	RTNLGRP_ND_USEROPT    = 0x14
+	RTNLGRP_PHONET_IFADDR = 0x15
+	RTNLGRP_PHONET_ROUTE  = 0x16
+	RTNLGRP_DCB           = 0x17
+	RTNLGRP_IPV4_NETCONF  = 0x18
+	RTNLGRP_IPV6_NETCONF  = 0x19
+	RTNLGRP_MDB           = 0x1a
+	RTNLGRP_MPLS_ROUTE    = 0x1b
+	RTNLGRP_NSID          = 0x1c
+	RTNLGRP_MPLS_NETCONF  = 0x1d
+	RTNLGRP_IPV4_MROUTE_R = 0x1e
+	RTNLGRP_IPV6_MROUTE_R = 0x1f
+	RTNLGRP_NEXTHOP       = 0x20
+)
+
 type CapUserHeader struct {
 	Version uint32
 	Pid     int32