client: reconnect more quickly if it's a dial error (#2240)

client/service.go

@@ -17,6 +17,7 @@ package client
 import (
 	"context"
 	"crypto/tls"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"net"
@@ -177,10 +178,17 @@ func (svr *Service) keepControllerWorking() {
 			if err != nil {
 				xl.Warn("reconnect to server error: %v", err)
 				time.Sleep(delayTime)
+
+				opErr := &net.OpError{}
+				// quick retry for dial error
+				if errors.As(err, &opErr) && opErr.Op == "dial" {
+					delayTime = 2 * time.Second
+				} else {
 					delayTime = delayTime * 2
 					if delayTime > maxDelayTime {
 						delayTime = maxDelayTime
 					}
+				}
 				continue
 			}
 			// reconnect success, init delayTime

pkg/config/visitor.go

@@ -23,7 +23,6 @@ import (
 	"gopkg.in/ini.v1"
 )
 
-
 // Visitor
 var (
 	visitorConfTypeMap = map[string]reflect.Type{
@@ -64,7 +63,6 @@ type XTCPVisitorConf struct {
 	BaseVisitorConf `ini:",extends" json:"inline"`
 }
 
-
 // DefaultVisitorConf creates a empty VisitorConf object by visitorType.
 // If visitorType doesn't exist, return nil.
 func DefaultVisitorConf(visitorType string) VisitorConf {

pkg/config/visitor_test.go

@@ -19,8 +19,8 @@ import (
 
 	"github.com/fatedier/frp/pkg/consts"
 
-	"gopkg.in/ini.v1"
 	"github.com/stretchr/testify/assert"
+	"gopkg.in/ini.v1"
 )
 
 const testVisitorPrefix = "test."

tests/ci/cmd_test.go

@@ -19,7 +19,7 @@ func TestCmdTCP(t *testing.T) {
 	if assert.NoError(err) {
 		defer s.Stop()
 	}
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	c := util.NewProcess(consts.FRPC_BIN_PATH, []string{"tcp", "-s", "127.0.0.1:20000", "-t", "123", "-u", "test",
 		"-l", "10701", "-r", "20801", "-n", "tcp_test"})
@@ -43,7 +43,7 @@ func TestCmdUDP(t *testing.T) {
 	if assert.NoError(err) {
 		defer s.Stop()
 	}
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	c := util.NewProcess(consts.FRPC_BIN_PATH, []string{"udp", "-s", "127.0.0.1:20000", "-t", "123", "-u", "test",
 		"-l", "10702", "-r", "20802", "-n", "udp_test"})
@@ -67,7 +67,7 @@ func TestCmdHTTP(t *testing.T) {
 	if assert.NoError(err) {
 		defer s.Stop()
 	}
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	c := util.NewProcess(consts.FRPC_BIN_PATH, []string{"http", "-s", "127.0.0.1:20000", "-t", "123", "-u", "test",
 		"-n", "udp_test", "-l", "10704", "--custom_domain", "127.0.0.1"})

tests/ci/health/health_test.go

@@ -175,7 +175,7 @@ func TestHealthCheck(t *testing.T) {
 		defer frpsProcess.Stop()
 	}
 
-	time.Sleep(100 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	frpcProcess := util.NewProcess(consts.FRPC_SUB_BIN_PATH, []string{"-c", frpcCfgPath})
 	err = frpcProcess.Start()

tests/ci/normal_test.go

@@ -42,7 +42,7 @@ func TestMain(m *testing.M) {
 		panic(err)
 	}
 
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 	p2 := util.NewProcess(consts.FRPC_BIN_PATH, []string{"-c", "./auto_test_frpc.ini"})
 	if err = p2.Start(); err != nil {
 		panic(err)

tests/ci/reconnect_test.go

@@ -56,7 +56,7 @@ func TestReconnect(t *testing.T) {
 		defer frpsProcess.Stop()
 	}
 
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	frpcProcess := util.NewProcess(consts.FRPC_BIN_PATH, []string{"-c", frpcCfgPath})
 	err = frpcProcess.Start()

tests/ci/reload_test.go

@@ -94,7 +94,7 @@ func TestReload(t *testing.T) {
 		defer frpsProcess.Stop()
 	}
 
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	frpcProcess := util.NewProcess(consts.FRPC_BIN_PATH, []string{"-c", frpcCfgPath})
 	err = frpcProcess.Start()

tests/ci/template_test.go

@@ -55,7 +55,7 @@ func TestConfTemplate(t *testing.T) {
 		defer frpsProcess.Stop()
 	}
 
-	time.Sleep(200 * time.Millisecond)
+	time.Sleep(500 * time.Millisecond)
 
 	frpcProcess := util.NewProcess("env", []string{"FRP_TOKEN=123456", "TCP_REMOTE_PORT=20801", consts.FRPC_BIN_PATH, "-c", frpcCfgPath})
 	err = frpcProcess.Start()