ngrok.ListenAndForward and replace github.com/cakturk/go-netstat

ListenAndForward.go

@@ -0,0 +1,248 @@
+// try test ngrok.ListenAndForward
+package main
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"net/url"
+	"strings"
+	"sync"
+
+	"github.com/inconshreveable/log15"
+	"golang.ngrok.com/ngrok"
+	"golang.ngrok.com/ngrok/config"
+	"golang.org/x/sync/errgroup"
+)
+
+// ListenAndForward creates a new [Forwarder] after connecting a new [Session], and
+// then forwards all connections to the provided URL.
+// This is a shortcut for calling [Connect] then [Session].ListenAndForward.
+//
+// Access to the underlying [Session] that was started automatically can be
+// accessed via [Forwarder].Session.
+//
+// If an error is encountered during [Session].ListenAndForward, the [Session]
+// object that was created will be closed automatically.
+func ListenAndForward(ctx context.Context, backend *url.URL, tunnelConfig config.Tunnel, connectOpts ...ngrok.ConnectOption) (ngrok.Forwarder, error) {
+	sess, err := ngrok.Connect(ctx, connectOpts...)
+	if err != nil {
+		return nil, err
+	}
+	fwd, err := ListenAndForwardSession(ctx, backend, tunnelConfig, sess)
+	if err != nil {
+		_ = sess.Close()
+		return nil, err
+	}
+
+	return fwd, nil
+}
+
+func forwardTunnel(ctx context.Context, tun ngrok.Tunnel, url *url.URL) ngrok.Forwarder {
+	mainGroup, ctx := errgroup.WithContext(ctx)
+	fwdTasks := &sync.WaitGroup{}
+
+	// sess := tun.Session()
+	// sessImpl := sess.(*sessionImpl)
+	// logger := sessImpl.inner().Logger.New("task", "forward", "toUrl", url, "tunnelUrl", tun.URL())
+	ltf.Println("task", "forward", "toUrl", url, "tunnelUrl", tun.URL())
+
+	mainGroup.Go(func() error {
+		for {
+			if ctxErr := ctx.Err(); ctxErr != nil {
+				return ctxErr
+			}
+
+			conn, err := tun.Accept()
+			if err != nil {
+				return err
+			}
+			fwdTasks.Add(1)
+
+			go func() {
+				ngrokConn := conn.(ngrok.Conn)
+				// defer ngrokConn.Close()
+
+				backend, err := openBackend(ctx, nil, tun, ngrokConn, url)
+				if err != nil {
+					defer ngrokConn.Close()
+					// logger.Warn("failed to connect to backend url", "error", err)
+					ltf.Println("failed to connect to backend url", "error", err)
+					fwdTasks.Done()
+					return
+				}
+
+				// defer backend.Close()
+				join(ctx, ngrokConn, backend)
+				fwdTasks.Done()
+			}()
+		}
+	})
+
+	return &forwarder{
+		Tunnel:    tun,
+		mainGroup: mainGroup,
+	}
+}
+
+// TODO: use an actual reverse proxy for http/s tunnels so that the host header gets set?
+func openBackend(ctx context.Context, logger log15.Logger, tun ngrok.Tunnel, tunnelConn ngrok.Conn, url *url.URL) (net.Conn, error) {
+	host := url.Hostname()
+	port := url.Port()
+	if port == "" {
+		switch {
+		case usesTLS(url.Scheme):
+			port = "443"
+		case isHTTP(url.Scheme):
+			port = "80"
+		default:
+			return nil, fmt.Errorf("no default tcp port available for %s", url.Scheme)
+		}
+		// logger.Debug("set default port", "port", port)
+		ltf.Println("set default port", "port", port)
+	}
+
+	// Create TLS config if necessary
+	var tlsConfig *tls.Config
+	if usesTLS(url.Scheme) {
+		tlsConfig = &tls.Config{
+			ServerName:    url.Hostname(),
+			Renegotiation: tls.RenegotiateOnceAsClient,
+		}
+	}
+
+	dialer := &net.Dialer{}
+	address := fmt.Sprintf("%s:%s", host, port)
+	// logger.Debug("dial backend tcp", "address", address)
+	ltf.Println("dial backend tcp", "address", address)
+
+	conn, err := dialer.DialContext(ctx, "tcp", address)
+	if err != nil {
+		defer tunnelConn.Close()
+
+		if isHTTP(tunnelConn.Proto()) {
+			_ = writeHTTPError(tunnelConn, err)
+		}
+		return nil, err
+	}
+
+	if usesTLS(url.Scheme) && !tunnelConn.PassthroughTLS() {
+		// logger.Debug("establishing TLS connection with backend")
+		ltf.Println("establishing TLS connection with backend")
+
+		return tls.Client(conn, tlsConfig), nil
+	}
+
+	return conn, nil
+}
+
+func usesTLS(scheme string) bool {
+	switch strings.ToLower(scheme) {
+	case "https", "tls":
+		return true
+	default:
+		return false
+	}
+}
+
+func isHTTP(scheme string) bool {
+	switch strings.ToLower(scheme) {
+	case "https", "http":
+		return true
+	default:
+		return false
+	}
+}
+
+func writeHTTPError(w io.Writer, err error) error {
+	resp := &http.Response{}
+	resp.StatusCode = http.StatusBadGateway
+	resp.Body = io.NopCloser(bytes.NewBufferString(fmt.Sprintf("failed to connect to backend: %s", err.Error())))
+	return resp.Write(w)
+}
+
+type forwarder struct {
+	ngrok.Tunnel
+	mainGroup *errgroup.Group
+}
+
+func (fwd *forwarder) Wait() error {
+	return fwd.mainGroup.Wait()
+}
+
+type BindExtra struct {
+	Token       string
+	IPPolicyRef string
+	Metadata    string
+}
+
+type tunnelConfigPrivate interface {
+	ForwardsTo() string
+	Extra() BindExtra
+	Proto() string
+	Opts() any
+	Labels() map[string]string
+	WithForwardsTo(string)
+}
+
+// %GOMODCACHE%\golang.ngrok.com\ngrok@v1.5.1\session.go
+// c:\Users\kga\go\pkg\mod\golang.ngrok.com\ngrok@v1.5.1\session.go
+// C:\Users\user\go\pkg\mod\golang.ngrok.com\ngrok@v1.5.1\session.go
+func ListenAndForwardSession(ctx context.Context, url *url.URL, cfg config.Tunnel, s ngrok.Session) (ngrok.Forwarder, error) {
+	tunnelCfg, ok := cfg.(tunnelConfigPrivate)
+	if !ok {
+		return nil, errors.New("invalid tunnel config")
+	}
+
+	// Set 'Forwards To'
+	if tunnelCfg.ForwardsTo() == "" {
+		tunnelCfg.WithForwardsTo(url.Host)
+	}
+
+	tun, err := s.Listen(ctx, cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	return forwardTunnel(ctx, tun, url), nil
+}
+
+// %GOMODCACHE%\golang.ngrok.com\ngrok@v1.5.1\forward.go
+// c:\Users\kga\go\pkg\mod\golang.ngrok.com\ngrok@v1.5.1\forward.go
+// C:\Users\user\go\pkg\mod\golang.ngrok.com\ngrok@v1.5.1\forward.go
+func join_(ctx context.Context, left, right net.Conn) {
+	g := &sync.WaitGroup{}
+	g.Add(2)
+	go func() {
+		_, _ = io.Copy(left, right)
+		left.Close()
+		g.Done()
+	}()
+	go func() {
+		_, _ = io.Copy(right, left)
+		right.Close()
+		g.Done()
+	}()
+	g.Wait()
+}
+
+func join(ctx context.Context, left, right net.Conn) {
+	g, _ := errgroup.WithContext(ctx) // when ctx is canceled (on WithStopHandler or WithDisconnectHandler ) interrupts both io.Copy
+	g.Go(func() error {
+		_, err := io.Copy(left, right)
+		left.Close() // on left disconnection interrupts io.Copy(right, left)
+		return err
+	})
+	g.Go(func() error {
+		_, err := io.Copy(right, left)
+		right.Close() // on right disconnection interrupts io.Copy(left, right)
+		return err
+	})
+	g.Wait()
+
+}

go.mod

@@ -2,30 +2,29 @@ module github.com/abakum/ngrokVNC
 
 go 1.20
 
-require github.com/ngrok/ngrok-api-go/v5 v5.0.0
+require github.com/ngrok/ngrok-api-go/v5 v5.1.0
 
 require (
 	github.com/go-stack/stack v1.8.1 // indirect
-	github.com/inconshreveable/log15 v3.0.0-testing.3+incompatible // indirect
 	github.com/inconshreveable/log15/v3 v3.0.0-testing.5 // indirect
 	github.com/jpillora/backoff v1.0.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.19 // indirect
-	github.com/stretchr/testify v1.8.4 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.ngrok.com/muxado v1.0.0 // indirect
-	golang.org/x/net v0.10.0 // indirect
-	golang.org/x/term v0.8.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	golang.ngrok.com/muxado/v2 v2.0.0 // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/term v0.13.0 // indirect
+	google.golang.org/protobuf v1.31.0 // indirect
 )
 
 require (
-	github.com/cakturk/go-netstat v0.0.0-20200220111822-e5b49efee7a5
+	github.com/abakum/go-netstat v0.0.0-20231106075911-001f10558dcf
+	github.com/inconshreveable/log15 v3.0.0-testing.5+incompatible
 	github.com/mitchellh/go-ps v1.0.0
 	github.com/xlab/closer v1.1.0
 	github.com/zzl/go-win32api/v2 v2.1.0
-	golang.ngrok.com/ngrok v1.3.0
-	golang.org/x/sync v0.3.0
-	golang.org/x/sys v0.8.0
+	golang.ngrok.com/ngrok v1.5.1
+	golang.org/x/sync v0.5.0
+	golang.org/x/sys v0.14.0
 	gopkg.in/ini.v1 v1.67.0
 )

go.sum

@@ -1,55 +1,55 @@
-github.com/cakturk/go-netstat v0.0.0-20200220111822-e5b49efee7a5 h1:BjkPE3785EwPhhyuFkbINB+2a1xATwk8SNDWnJiD41g=
-github.com/cakturk/go-netstat v0.0.0-20200220111822-e5b49efee7a5/go.mod h1:jtAfVaU/2cu1+wdSRPWE2c1N2qeAA3K4RH9pYgqwets=
+github.com/abakum/go-netstat v0.0.0-20231106075911-001f10558dcf h1:U6bESAU3E0/IMcThHn2Z+tAEgsDVn2K/+6eT6dd2l8k=
+github.com/abakum/go-netstat v0.0.0-20231106075911-001f10558dcf/go.mod h1:VDmPFexMx7WdPUz+8/esyAIL4VIT13CSUmbQQZV420c=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/go-stack/stack v1.8.1 h1:ntEHSVwIt7PNXNpgPmVfMrNhLtgjlmnZha2kOpuRiDw=
 github.com/go-stack/stack v1.8.1/go.mod h1:dcoOX6HbPZSZptuspn9bctJ+N/CnF5gGygcUP3XYfe4=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.8 h1:e6P7q2lk1O+qJJb4BtCQXlK8vWEO8V1ZeuEdJNOqZyg=
 github.com/hashicorp/yamux v0.1.1 h1:yrQxtgseBDrq9Y652vSRDvsKCJKOUD+GzTS4Y0Y8pvE=
-github.com/inconshreveable/log15 v3.0.0-testing.3+incompatible h1:zaX5fYT98jX5j4UhO/WbfY8T1HkgVrydiDMC9PWqGCo=
-github.com/inconshreveable/log15 v3.0.0-testing.3+incompatible/go.mod h1:cOaXtrgN4ScfRrD9Bre7U1thNq5RtJ8ZoP4iXVGRj6o=
+github.com/inconshreveable/log15 v3.0.0-testing.5+incompatible h1:VryeOTiaZfAzwx8xBcID1KlJCeoWSIpsNbSk+/D2LNk=
+github.com/inconshreveable/log15 v3.0.0-testing.5+incompatible/go.mod h1:cOaXtrgN4ScfRrD9Bre7U1thNq5RtJ8ZoP4iXVGRj6o=
 github.com/inconshreveable/log15/v3 v3.0.0-testing.5 h1:h4e0f3kjgg+RJBlKOabrohjHe47D3bbAB9BgMrc3DYA=
 github.com/inconshreveable/log15/v3 v3.0.0-testing.5/go.mod h1:3GQg1SVrLoWGfRv/kAZMsdyU5cp8eFc1P3cw+Wwku94=
 github.com/jpillora/backoff v1.0.0 h1:uvFg412JmmHBHw7iwprIxkPMI+sGQ4kzOWsMeHnm2EA=
 github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
 github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
-github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
-github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
+github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/mitchellh/go-ps v1.0.0 h1:i6ampVEEF4wQFF+bkYfwYgY+F/uYJDktmvLPf7qIgjc=
 github.com/mitchellh/go-ps v1.0.0/go.mod h1:J4lOc8z8yJs6vUwklHw2XEIiT4z4C40KtWVN3nvg8Pg=
-github.com/ngrok/ngrok-api-go/v5 v5.0.0 h1:eksowVztKNQU0JBaYS2hXGiC/xtGXj8LAx8lAuzYlsw=
-github.com/ngrok/ngrok-api-go/v5 v5.0.0/go.mod h1:cxMRsWuE0EwK/JB/5prvHK0LEWB3KP16iwvIMqvDVP0=
+github.com/ngrok/ngrok-api-go/v5 v5.1.0 h1:GUYNFB/uvxYACNwnhWEi8mZcUCGuSsZ8/gB1yWPqHlY=
+github.com/ngrok/ngrok-api-go/v5 v5.1.0/go.mod h1:UVTaHI5B4gEsfHCOZTlRg8WkT6+KBijIkVtjpDqCyIU=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/xlab/closer v1.1.0 h1:yrDiOXjd/B7pZ3lZkl/EZ1gWrR2M2N5XpBnixynm4mc=
 github.com/xlab/closer v1.1.0/go.mod h1:Ff8YcUPbn5jju6nClrMCmJHQABM0S/obEK0za/1yVMk=
 github.com/zzl/go-win32api/v2 v2.1.0 h1:BwXsEl3iycRhG4lpe3JsnNACyQH/U7RTBhJwyCaIB/g=
 github.com/zzl/go-win32api/v2 v2.1.0/go.mod h1:doi6ewHPdh9tDmqe837Ro7IwqtB9yE+1fC8suK/Ssj0=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
-golang.ngrok.com/muxado v1.0.0 h1:r4BOkKR/7B6JpPvWzsUJ7E7OEPDSwNku/NW3jFuU0QQ=
-golang.ngrok.com/muxado v1.0.0/go.mod h1:ttzTgo3kIxNRpoJdle7jgSvPo7mqY+RtuZKM3iObkF0=
-golang.ngrok.com/ngrok v1.3.0 h1:oQ7EvMOAgjTHiyksfZ0efbVcFtaP9/pGTS7LMLeqAsM=
-golang.ngrok.com/ngrok v1.3.0/go.mod h1:kzmBMe8oFB3x6mmJDfT6QYpair9bRDgAdiaNU468ehQ=
-golang.org/x/crypto v0.9.0 h1:LF6fAI+IutBocDJ2OT0Q1g8plpYljMZ4+lty+dsqw3g=
-golang.org/x/net v0.10.0 h1:X2//UzNDwYmtCLn7To6G58Wr6f5ahEAQgKNzv9Y951M=
-golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
-golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
-golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.ngrok.com/muxado/v2 v2.0.0 h1:bu9eIDhRdYNtIXNnqat/HyMeHYOAbUH55ebD7gTvW6c=
+golang.ngrok.com/muxado/v2 v2.0.0/go.mod h1:wzxJYX4xiAtmwumzL+QsukVwFRXmPNv86vB8RPpOxyM=
+golang.ngrok.com/ngrok v1.5.1 h1:L4HTk81UIzkXatVdslkfW11XdeureKRHcg97hGUWahU=
+golang.ngrok.com/ngrok v1.5.1/go.mod h1:ruVcXZ7Rre5O9oeqqa8uZCB3Xtkt2PoyjF3eW9b7t6A=
+golang.org/x/crypto v0.14.0 h1:wBqGXzWJW6m1XrIKlAH0Hs1JJ7+9KBwnIO8v66Q9cHc=
+golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
+golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
+golang.org/x/sync v0.5.0 h1:60k92dhOjHxJkrqnwsfl8KuaHbn/5dl0lUPUklKo3qE=
+golang.org/x/sync v0.5.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.8.0 h1:EBmGv8NaZBZTWvrbjNoL6HVt+IVy3QDQpJs7VRIw3tU=
-golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/term v0.8.0 h1:n5xxQn2i3PC0yLAbjTpNT85q/Kgzcr2gIoX9OrJUols=
-golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
+golang.org/x/sys v0.14.0 h1:Vz7Qs629MkJkGyHxUlRHizWJRG2j8fbQKjELVSNhy7Q=
+golang.org/x/sys v0.14.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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