.github/pull_request_template.md

@@ -1,3 +1,6 @@
-### WHY
+### Summary
 
+copilot:summary
+
+### WHY
 <!-- author to complete -->

.golangci.yml

@@ -132,9 +132,6 @@ issues:
   - linters:
     - revive
     text: "unused-parameter"
-  - linters:
-    - unparam
-    text: "is always false"
 
   # Independently from option `exclude` we use default exclude patterns,
   # it can be disabled by this option. To list all

Release.md

@@ -1,3 +1,11 @@
+### Features
+
+* The new command line parameter `--strict_config` has been added to enable strict configuration validation mode. It will throw an error for unknown fields instead of ignoring them. In future versions, we will set the default value of this parameter to true to avoid misconfigurations.
+* Support `SSH reverse tunneling`. With this feature, you can expose your local service without running frpc, only using SSH. The SSH reverse tunnel agent has many functional limitations compared to the frpc agent. The currently supported proxy types are tcp, http, https, tcpmux, and stcp.
+* The frpc tcpmux command line parameters have been updated to support configuring `http_user` and `http_pwd`.
+* The frpc stcp/sudp/xtcp command line parameters have been updated to support configuring `allow_users`.
+
 ### Fixes
 
-* frpc has a certain chance to panic when login: close of closed channel.
+* frpc: Return code 1 when the first login attempt fails and exits.
+* When auth.method is `oidc` and auth.additionalScopes contains `HeartBeats`, if obtaining AccessToken fails, the application will be unresponsive.

client/control.go

@@ -239,15 +239,15 @@ func (ctl *Control) heartbeatWorker() {
 	// Users can still enable heartbeat feature by setting HeartbeatInterval to a positive value.
 	if ctl.sessionCtx.Common.Transport.HeartbeatInterval > 0 {
 		// send heartbeat to server
-		sendHeartBeat := func() (bool, error) {
+		sendHeartBeat := func() error {
 			xl.Debug("send heartbeat to server")
 			pingMsg := &msg.Ping{}
 			if err := ctl.sessionCtx.AuthSetter.SetPing(pingMsg); err != nil {
 				xl.Warn("error during ping authentication: %v, skip sending ping message", err)
-				return false, err
+				return err
 			}
 			_ = ctl.msgDispatcher.Send(pingMsg)
-			return false, nil
+			return nil
 		}
 
 		go wait.BackoffUntil(sendHeartBeat,

client/service.go

@@ -192,16 +192,16 @@ func (svr *Service) keepControllerWorking() {
 	// the control immediately exits. It is necessary to limit the frequency of reconnection in this case.
 	// The interval for the first three retries in 1 minute will be very short, and then it will increase exponentially.
 	// The maximum interval is 20 seconds.
-	wait.BackoffUntil(func() (bool, error) {
+	wait.BackoffUntil(func() error {
 		// loopLoginUntilSuccess is another layer of loop that will continuously attempt to
 		// login to the server until successful.
 		svr.loopLoginUntilSuccess(20*time.Second, false)
 		if svr.ctl != nil {
 			<-svr.ctl.Done()
-			return false, errors.New("control is closed and try another loop")
+			return errors.New("control is closed and try another loop")
 		}
 		// If the control is nil, it means that the login failed and the service is also closed.
-		return false, nil
+		return nil
 	}, wait.NewFastBackoffManager(
 		wait.FastBackoffOptions{
 			Duration:        time.Second,
@@ -282,8 +282,9 @@ func (svr *Service) login() (conn net.Conn, connector Connector, err error) {
 
 func (svr *Service) loopLoginUntilSuccess(maxInterval time.Duration, firstLoginExit bool) {
 	xl := xlog.FromContextSafe(svr.ctx)
+	successCh := make(chan struct{})
 
-	loginFunc := func() (bool, error) {
+	loginFunc := func() error {
 		xl.Info("try to connect to server...")
 		conn, connector, err := svr.login()
 		if err != nil {
@@ -291,7 +292,7 @@ func (svr *Service) loopLoginUntilSuccess(maxInterval time.Duration, firstLoginE
 			if firstLoginExit {
 				svr.cancel(cancelErr{Err: err})
 			}
-			return false, err
+			return err
 		}
 
 		svr.cfgMu.RLock()
@@ -314,7 +315,7 @@ func (svr *Service) loopLoginUntilSuccess(maxInterval time.Duration, firstLoginE
 		if err != nil {
 			conn.Close()
 			xl.Error("NewControl error: %v", err)
-			return false, err
+			return err
 		}
 		ctl.SetInWorkConnCallback(svr.handleWorkConnCb)
 
@@ -326,7 +327,9 @@ func (svr *Service) loopLoginUntilSuccess(maxInterval time.Duration, firstLoginE
 		}
 		svr.ctl = ctl
 		svr.ctlMu.Unlock()
-		return true, nil
+
+		close(successCh)
+		return nil
 	}
 
 	// try to reconnect to server until success
@@ -336,7 +339,9 @@ func (svr *Service) loopLoginUntilSuccess(maxInterval time.Duration, firstLoginE
 			Factor:      2,
 			Jitter:      0.1,
 			MaxDuration: maxInterval,
-		}), true, svr.ctx.Done())
+		}),
+		true,
+		wait.MergeAndCloseOnAnyStopChannel(svr.ctx.Done(), successCh))
 }
 
 func (svr *Service) UpdateAllConfigurer(proxyCfgs []v1.ProxyConfigurer, visitorCfgs []v1.VisitorConfigurer) error {

pkg/util/version/version.go

@@ -19,7 +19,7 @@ import (
 	"strings"
 )
 
-var version = "0.53.2"
+var version = "0.53.0"
 
 func Full() string {
 	return version

pkg/util/wait/backoff.go

@@ -16,9 +16,10 @@ package wait
 
 import (
 	"math/rand"
-	"sync"
 	"time"
 
+	"github.com/samber/lo"
+
 	"github.com/fatedier/frp/pkg/util/util"
 )
 
@@ -113,7 +114,7 @@ func (f *fastBackoffImpl) Backoff(previousDuration time.Duration, previousCondit
 	return f.options.Duration
 }
 
-func BackoffUntil(f func() (bool, error), backoff BackoffManager, sliding bool, stopCh <-chan struct{}) {
+func BackoffUntil(f func() error, backoff BackoffManager, sliding bool, stopCh <-chan struct{}) {
 	var delay time.Duration
 	previousError := false
 
@@ -131,9 +132,7 @@ func BackoffUntil(f func() (bool, error), backoff BackoffManager, sliding bool,
 			delay = backoff.Backoff(delay, previousError)
 		}
 
-		if done, err := f(); done {
-			return
-		} else if err != nil {
+		if err := f(); err != nil {
 			previousError = true
 		} else {
 			previousError = false
@@ -144,6 +143,12 @@ func BackoffUntil(f func() (bool, error), backoff BackoffManager, sliding bool,
 		}
 
 		ticker.Reset(delay)
+		select {
+		case <-stopCh:
+			return
+		default:
+		}
+
 		select {
 		case <-stopCh:
 			return
@@ -166,9 +171,9 @@ func Jitter(duration time.Duration, maxFactor float64) time.Duration {
 }
 
 func Until(f func(), period time.Duration, stopCh <-chan struct{}) {
-	ff := func() (bool, error) {
+	ff := func() error {
 		f()
-		return false, nil
+		return nil
 	}
 	BackoffUntil(ff, BackoffFunc(func(time.Duration, bool) time.Duration {
 		return period
@@ -177,18 +182,16 @@ func Until(f func(), period time.Duration, stopCh <-chan struct{}) {
 
 func MergeAndCloseOnAnyStopChannel[T any](upstreams ...<-chan T) <-chan T {
 	out := make(chan T)
-	closeOnce := sync.Once{}
+
 	for _, upstream := range upstreams {
 		ch := upstream
-		go func() {
+		go lo.Try0(func() {
 			select {
 			case <-ch:
-				closeOnce.Do(func() {
-					close(out)
-				})
+				close(out)
 			case <-out:
 			}
-		}()
+		})
 	}
 	return out
 }