cmd/derper, derp/derphttp: add websocket support

Updates #3157

Change-Id: I337a919a3b350bc7bd9af567b49c4d5d6616abdd
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>

cmd/derper/derper.go

@@ -173,7 +173,9 @@ func main() {
 	expvar.Publish("derp", s.ExpVar())
 
 	mux := http.NewServeMux()
-	mux.Handle("/derp", derphttp.Handler(s))
+	derpHandler := derphttp.Handler(s)
+	derpHandler = addWebSocketSupport(s, derpHandler)
+	mux.Handle("/derp", derpHandler)
 	go refreshBootstrapDNSLoop()
 	mux.HandleFunc("/bootstrap-dns", handleBootstrapDNS)
 	mux.Handle("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

cmd/derper/websocket.go

@@ -0,0 +1,52 @@
+// Copyright (c) 2021 Tailscale Inc & 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 main
+
+import (
+	"bufio"
+	"expvar"
+	"log"
+	"net/http"
+	"strings"
+
+	"nhooyr.io/websocket"
+	"tailscale.com/derp"
+	"tailscale.com/derp/wsconn"
+)
+
+var counterWebSocketAccepts = expvar.NewInt("derp_websocket_accepts")
+
+// addWebSocketSupport returns a Handle wrapping base that adds WebSocket server support.
+func addWebSocketSupport(s *derp.Server, base http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		up := strings.ToLower(r.Header.Get("Upgrade"))
+
+		// Very early versions of Tailscale set "Upgrade: WebSocket" but didn't actually
+		// speak WebSockets (they still assumed DERP's binary framining). So to distinguish
+		// clients that actually want WebSockets, look for an explicit "derp" subprotocol.
+		if up != "websocket" || !strings.Contains(r.Header.Get("Sec-Websocket-Protocol"), "derp") {
+			base.ServeHTTP(w, r)
+			return
+		}
+
+		c, err := websocket.Accept(w, r, &websocket.AcceptOptions{
+			Subprotocols:   []string{"derp"},
+			OriginPatterns: []string{"*"},
+		})
+		if err != nil {
+			log.Printf("websocket.Accept: %v", err)
+			return
+		}
+		defer c.Close(websocket.StatusInternalError, "closing")
+		if c.Subprotocol() != "derp" {
+			c.Close(websocket.StatusPolicyViolation, "client must speak the derp subprotocol")
+			return
+		}
+		counterWebSocketAccepts.Add(1)
+		wc := wsconn.New(c)
+		brw := bufio.NewReadWriter(bufio.NewReader(wc), bufio.NewWriter(wc))
+		s.Accept(wc, brw, r.RemoteAddr)
+	})
+}

cmd/tailscale/depaware.txt

@@ -4,6 +4,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
    W    github.com/alexbrainman/sspi/internal/common                 from github.com/alexbrainman/sspi/negotiate
    W 💣 github.com/alexbrainman/sspi/negotiate                       from tailscale.com/net/tshttpproxy
         github.com/kballard/go-shellquote                            from tailscale.com/cmd/tailscale/cli
+   L    github.com/klauspost/compress/flate                          from nhooyr.io/websocket
      💣 github.com/mitchellh/go-ps                                   from tailscale.com/cmd/tailscale/cli+
         github.com/peterbourgon/ff/v3                                from github.com/peterbourgon/ff/v3/ffcli
         github.com/peterbourgon/ff/v3/ffcli                          from tailscale.com/cmd/tailscale/cli
@@ -23,6 +24,9 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
         go4.org/unsafe/assume-no-moving-gc                           from go4.org/intern
    W 💣 golang.zx2c4.com/wireguard/windows/tunnel/winipcfg           from tailscale.com/net/interfaces+
         inet.af/netaddr                                              from tailscale.com/cmd/tailscale/cli+
+   L    nhooyr.io/websocket                                          from tailscale.com/derp/derphttp+
+   L    nhooyr.io/websocket/internal/errd                            from nhooyr.io/websocket
+   L    nhooyr.io/websocket/internal/xsync                           from nhooyr.io/websocket
         tailscale.com/atomicfile                                     from tailscale.com/ipn+
         tailscale.com/client/tailscale                               from tailscale.com/cmd/tailscale/cli+
         tailscale.com/client/tailscale/apitype                       from tailscale.com/client/tailscale+
@@ -30,6 +34,7 @@ tailscale.com/cmd/tailscale dependencies: (generated by github.com/tailscale/dep
         tailscale.com/control/controlknobs                           from tailscale.com/net/portmapper
         tailscale.com/derp                                           from tailscale.com/derp/derphttp
         tailscale.com/derp/derphttp                                  from tailscale.com/net/netcheck
+   L    tailscale.com/derp/wsconn                                    from tailscale.com/derp/derphttp
         tailscale.com/disco                                          from tailscale.com/derp
         tailscale.com/hostinfo                                       from tailscale.com/net/interfaces
         tailscale.com/ipn                                            from tailscale.com/cmd/tailscale/cli+

cmd/tailscaled/depaware.txt

@@ -73,6 +73,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
    L 💣 github.com/jsimonetti/rtnetlink                              from tailscale.com/wgengine/monitor
    L    github.com/jsimonetti/rtnetlink/internal/unix                from github.com/jsimonetti/rtnetlink
         github.com/klauspost/compress                                from github.com/klauspost/compress/zstd
+   L    github.com/klauspost/compress/flate                          from nhooyr.io/websocket
         github.com/klauspost/compress/fse                            from github.com/klauspost/compress/huff0
         github.com/klauspost/compress/huff0                          from github.com/klauspost/compress/zstd
         github.com/klauspost/compress/internal/snapref               from github.com/klauspost/compress/zstd
@@ -145,6 +146,9 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         inet.af/netstack/waiter                                      from inet.af/netstack/tcpip+
         inet.af/peercred                                             from tailscale.com/ipn/ipnserver
    W 💣 inet.af/wf                                                   from tailscale.com/wf
+   L    nhooyr.io/websocket                                          from tailscale.com/derp/derphttp+
+   L    nhooyr.io/websocket/internal/errd                            from nhooyr.io/websocket
+   L    nhooyr.io/websocket/internal/xsync                           from nhooyr.io/websocket
         tailscale.com/atomicfile                                     from tailscale.com/ipn+
   LD    tailscale.com/chirp                                          from tailscale.com/cmd/tailscaled
         tailscale.com/client/tailscale                               from tailscale.com/derp
@@ -153,6 +157,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         tailscale.com/control/controlknobs                           from tailscale.com/control/controlclient+
         tailscale.com/derp                                           from tailscale.com/derp/derphttp+
         tailscale.com/derp/derphttp                                  from tailscale.com/cmd/tailscaled+
+   L    tailscale.com/derp/wsconn                                    from tailscale.com/derp/derphttp
         tailscale.com/disco                                          from tailscale.com/derp+
         tailscale.com/health                                         from tailscale.com/control/controlclient+
         tailscale.com/hostinfo                                       from tailscale.com/control/controlclient+
@@ -279,7 +284,7 @@ tailscale.com/cmd/tailscaled dependencies: (generated by github.com/tailscale/de
         golang.org/x/time/rate                                       from inet.af/netstack/tcpip/stack+
         bufio                                                        from compress/flate+
         bytes                                                        from bufio+
-        compress/flate                                               from compress/gzip
+        compress/flate                                               from compress/gzip+
         compress/gzip                                                from internal/profile+
         container/heap                                               from inet.af/netstack/tcpip/transport/tcp
         container/list                                               from crypto/tls+

derp/derphttp/derphttp_client.go

@@ -22,6 +22,9 @@ import (
 	"net"
 	"net/http"
 	"net/url"
+	"os"
+	"runtime"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -177,6 +180,20 @@ func (c *Client) urlString(node *tailcfg.DERPNode) string {
 	return fmt.Sprintf("https://%s/derp", node.HostName)
 }
 
+// dialWebsocketFunc is non-nil (set by websocket.go's init) when compiled in.
+var dialWebsocketFunc func(ctx context.Context, urlStr string) (net.Conn, error)
+
+func useWebsockets() bool {
+	if runtime.GOOS == "js" {
+		return true
+	}
+	if dialWebsocketFunc != nil {
+		v, _ := strconv.ParseBool(os.Getenv("TS_DEBUG_DERP_WS_CLIENT"))
+		return v
+	}
+	return false
+}
+
 func (c *Client) connect(ctx context.Context, caller string) (client *derp.Client, connGen int, err error) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
@@ -229,10 +246,44 @@ func (c *Client) connect(ctx context.Context, caller string) (client *derp.Clien
 	}()
 
 	var node *tailcfg.DERPNode // nil when using c.url to dial
+	switch {
+	case useWebsockets():
+		var urlStr string
 		if c.url != nil {
+			urlStr = c.url.String()
+		} else {
+			urlStr = c.urlString(reg.Nodes[0])
+		}
+		c.logf("%s: connecting websocket to %v", caller, urlStr)
+		conn, err := dialWebsocketFunc(ctx, urlStr)
+		if err != nil {
+			c.logf("%s: websocket to %v error: %v", caller, urlStr, err)
+			return nil, 0, err
+		}
+		brw := bufio.NewReadWriter(bufio.NewReader(conn), bufio.NewWriter(conn))
+		derpClient, err := derp.NewClient(c.privateKey, conn, brw, c.logf,
+			derp.MeshKey(c.MeshKey),
+			derp.CanAckPings(c.canAckPings),
+			derp.IsProber(c.IsProber),
+		)
+		if err != nil {
+			return nil, 0, err
+		}
+		if c.preferred {
+			if err := derpClient.NotePreferred(true); err != nil {
+				go conn.Close()
+				return nil, 0, err
+			}
+		}
+		c.serverPubKey = derpClient.ServerPublicKey()
+		c.client = derpClient
+		c.netConn = tcpConn
+		c.connGen++
+		return c.client, c.connGen, nil
+	case c.url != nil:
 		c.logf("%s: connecting to %v", caller, c.url)
 		tcpConn, err = c.dialURL(ctx)
-	} else {
+	default:
 		c.logf("%s: connecting to derp-%d (%v)", caller, reg.RegionID, reg.RegionCode)
 		tcpConn, node, err = c.dialRegion(ctx, reg)
 	}

derp/derphttp/derphttp_server.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"strings"
 
 	"tailscale.com/derp"
 )
@@ -20,10 +21,13 @@ const fastStartHeader = "Derp-Fast-Start"
 
 func Handler(s *derp.Server) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if p := r.Header.Get("Upgrade"); p != "WebSocket" && p != "DERP" {
+		up := strings.ToLower(r.Header.Get("Upgrade"))
+		if up != "websocket" && up != "derp" {
+			log.Printf("Weird upgrade: %q", up)
 			http.Error(w, "DERP requires connection upgrade", http.StatusUpgradeRequired)
 			return
 		}
+
 		fastStart := r.Header.Get(fastStartHeader) == "1"
 
 		h, ok := w.(http.Hijacker)

derp/derphttp/websocket.go

@@ -0,0 +1,33 @@
+// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build linux || js
+// +build linux js
+
+package derphttp
+
+import (
+	"context"
+	"log"
+	"net"
+
+	"nhooyr.io/websocket"
+	"tailscale.com/derp/wsconn"
+)
+
+func init() {
+	dialWebsocketFunc = dialWebsocket
+}
+
+func dialWebsocket(ctx context.Context, urlStr string) (net.Conn, error) {
+	c, res, err := websocket.Dial(ctx, urlStr, &websocket.DialOptions{
+		Subprotocols: []string{"derp"},
+	})
+	if err != nil {
+		log.Printf("websocket Dial: %v, %+v", err, res)
+		return nil, err
+	}
+	log.Printf("websocket: connected to %v", urlStr)
+	return wsconn.New(c), nil
+}

derp/wsconn/wsconn.go

@@ -0,0 +1,104 @@
+// Copyright (c) 2021 Tailscale Inc & 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 wsconn contains an adapter type that turns
+// a websocket connection into a net.Conn.
+package wsconn
+
+import (
+	"context"
+	"net"
+	"sync"
+	"time"
+
+	"nhooyr.io/websocket"
+)
+
+// New returns a net.Conn wrapper around c,
+// using c to send and receive binary messages with
+// chunks of bytes with no defined framing, effectively
+// discarding all WebSocket-level message framing.
+func New(c *websocket.Conn) net.Conn {
+	return &websocketConn{c: c}
+}
+
+// websocketConn implements derp.Conn around a *websocket.Conn,
+// treating a websocket.Conn as a byte stream, ignoring the WebSocket
+// frame/message boundaries.
+type websocketConn struct {
+	c *websocket.Conn
+
+	// rextra are extra bytes owned by the reader.
+	rextra []byte
+
+	mu         sync.Mutex
+	rdeadline  time.Time
+	cancelRead context.CancelFunc
+}
+
+func (wc *websocketConn) LocalAddr() net.Addr  { return addr{} }
+func (wc *websocketConn) RemoteAddr() net.Addr { return addr{} }
+
+type addr struct{}
+
+func (addr) Network() string { return "websocket" }
+func (addr) String() string  { return "websocket" }
+
+func (wc *websocketConn) Read(p []byte) (n int, err error) {
+	// Drain any leftover from previously.
+	n = copy(p, wc.rextra)
+	if n > 0 {
+		wc.rextra = wc.rextra[n:]
+		return n, nil
+	}
+
+	var ctx context.Context
+	var cancel context.CancelFunc
+
+	wc.mu.Lock()
+	if dl := wc.rdeadline; !dl.IsZero() {
+		ctx, cancel = context.WithDeadline(context.Background(), wc.rdeadline)
+	} else {
+		ctx, cancel = context.WithDeadline(context.Background(), time.Now().Add(30*24*time.Hour))
+		wc.rdeadline = time.Time{}
+	}
+	wc.cancelRead = cancel
+	wc.mu.Unlock()
+	defer cancel()
+
+	_, buf, err := wc.c.Read(ctx)
+	n = copy(p, buf)
+	wc.rextra = buf[n:]
+	return n, err
+}
+
+func (wc *websocketConn) Write(p []byte) (n int, err error) {
+	err = wc.c.Write(context.Background(), websocket.MessageBinary, p)
+	if err != nil {
+		return 0, err
+	}
+	return len(p), nil
+}
+
+func (wc *websocketConn) Close() error { return wc.c.Close(websocket.StatusNormalClosure, "close") }
+
+func (wc *websocketConn) SetDeadline(t time.Time) error {
+	wc.SetReadDeadline(t)
+	wc.SetWriteDeadline(t)
+	return nil
+}
+
+func (wc *websocketConn) SetReadDeadline(t time.Time) error {
+	wc.mu.Lock()
+	defer wc.mu.Unlock()
+	if !t.IsZero() && (wc.rdeadline.IsZero() || t.Before(wc.rdeadline)) && wc.cancelRead != nil {
+		wc.cancelRead()
+	}
+	wc.rdeadline = t
+	return nil
+}
+
+func (wc *websocketConn) SetWriteDeadline(t time.Time) error {
+	return nil
+}

go.mod

@@ -57,6 +57,7 @@ require (
 	inet.af/netstack v0.0.0-20210622165351-29b14ebc044e
 	inet.af/peercred v0.0.0-20210318190834-4259e17bb763
 	inet.af/wf v0.0.0-20210516214145-a5343001b756
+	nhooyr.io/websocket v1.8.7
 )
 
 require (

go.sum

@@ -133,6 +133,10 @@ github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMo
 github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.6.3 h1:ahKqKTFpO5KTPHxWZjEdPScmYaGtLo8Y4DMHoEsnp14=
+github.com/gin-gonic/gin v1.6.3/go.mod h1:75u5sXoLsGZoRN5Sgbi1eraJ4GU3++wFwWzhwvtwp4M=
 github.com/github/fakeca v0.1.0 h1:Km/MVOFvclqxPM9dZBC4+QE564nU4gz4iZ0D9pMw28I=
 github.com/github/fakeca v0.1.0/go.mod h1:+bormgoGMMuamOscx7N91aOuUST7wdaJ2rNjeohylyo=
 github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
@@ -157,6 +161,13 @@ github.com/go-multierror/multierror v1.0.2/go.mod h1:U7SZR/D9jHgt2nkSj8XcbCWdmVM
 github.com/go-ole/go-ole v1.2.1/go.mod h1:7FAglXiTm7HKlQRDeOQ6ZNUHidzCWXuZWq/1dTyBNF8=
 github.com/go-ole/go-ole v1.2.6-0.20210915003542-8b1f7f90f6b1 h1:4dntyT+x6QTOSCIrgczbQ+ockAEha0cfxD5Wi0iCzjY=
 github.com/go-ole/go-ole v1.2.6-0.20210915003542-8b1f7f90f6b1/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
+github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q=
+github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
+github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/validator/v10 v10.2.0 h1:KgJ0snyC2R9VXYN2rneOtQcw5aHQB1Vv0sFl1UcHBOY=
+github.com/go-playground/validator/v10 v10.2.0/go.mod h1:uOYAAleCW8F/7oMFd6aG0GOhaH6EGOAJShg8Id5JGkI=
 github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-toolsmith/astcast v1.0.0 h1:JojxlmI6STnFVG9yOImLeGREv8W2ocNUM+iOhR6jE7g=
@@ -181,6 +192,12 @@ github.com/go-xmlfmt/xmlfmt v0.0.0-20191208150333-d5b6f63a941b h1:khEcpUM4yFcxg4
 github.com/go-xmlfmt/xmlfmt v0.0.0-20191208150333-d5b6f63a941b/go.mod h1:aUCEOzzezBEjDBbFBoSiya/gduyIiWYRP6CnSFIV8AM=
 github.com/gobwas/glob v0.2.3 h1:A4xDbljILXROh+kObIiy5kIaPYD8e96x1tgBhUI5J+Y=
 github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJAkT8=
+github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee h1:s+21KNqlpePfkah2I+gwHF8xmJWRjooY+5248k6m4A0=
+github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee/go.mod h1:L0fX3K22YWvt/FAX9NnzrNzcI4wNYi9Yku4O0LKYflo=
+github.com/gobwas/pool v0.2.0 h1:QEmUOlnSjWtnpRGHF3SauEiOsy82Cup83Vf2LcMlnc8=
+github.com/gobwas/pool v0.2.0/go.mod h1:q8bcK0KcYlCgd9e7WYLm9LpyS+YeLd8JVDW6WezmKEw=
+github.com/gobwas/ws v1.0.2 h1:CoAavW/wd/kulfZmSIBt6p24n4j7tHgNVCjsfHVNUbo=
+github.com/gobwas/ws v1.0.2/go.mod h1:szmBTxLgaFppYjEmNtny/v3w89xOydFnnZMcgRRu/EM=
 github.com/godbus/dbus/v5 v5.0.5 h1:9Eg0XUhQxtkV8ykTMKtMMYY72g4NgxtRq4jgh4Ih5YM=
 github.com/godbus/dbus/v5 v5.0.5/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gofrs/flock v0.8.0 h1:MSdYClljsF3PbENUUEx85nkWfJSGfzYI9yEBZOJz6CY=
@@ -199,11 +216,14 @@ github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
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@@ -251,6 +271,7 @@ github.com/google/go-cmp v0.5.4/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/
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@@ -274,6 +295,8 @@ github.com/goreleaser/fileglob v0.3.1 h1:OTFDWqUUHjQazk2N5GdUqEbqT/grBnRARaAXsV0
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@@ -350,6 +373,8 @@ github.com/jsimonetti/rtnetlink v0.0.0-20210212075122-66c871082f2b/go.mod h1:8w9
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@@ -362,6 +387,7 @@ github.com/kevinburke/ssh_config v0.0.0-20201106050909-4977a11b4351/go.mod h1:CT
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@@ -383,6 +409,8 @@ github.com/kunwardeep/paralleltest v1.0.2 h1:/jJRv0TiqPoEy/Y8dQxCFJhD56uS/pnvtat
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@@ -453,7 +481,11 @@ github.com/mitchellh/mapstructure v1.4.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RR
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@@ -632,6 +664,10 @@ github.com/toqueteos/webbrowser v1.2.0 h1:tVP/gpK69Fx+qMJKsLE7TD8LuGWPnEV71wBN9r
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@@ -850,6 +886,7 @@ golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
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@@ -950,6 +987,7 @@ google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ
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@@ -1006,6 +1044,8 @@ mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b h1:DxJ5nJdkhDlLok9K6qO+5290kphD
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