a

CHANGELOG

@@ -1,4 +1,11 @@
 proxy更新日志
+v5.5
+1.预编译的二进制增加了armv8支持.
+2.预编译的mipsle和mips二进制增加了softfloat支持.
+3.优化连接HTTP(s)上级代理的CONNECT指令,附带更多的信息.
+4.重构了内网穿透的UDP功能,性能大幅度提升,可以愉快的与异地基友玩依赖UDP的局域网游戏了.
+5.重构了UDP端口映射,性能大幅度提升.
+
 v5.4
 1.优化了获取本地IP信息导致CPU过高的问题.
 2.所有服务都增加了--nolog参数,可以关闭日志输出,节省CPU.

release.sh

@@ -18,10 +18,16 @@ CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=7 go build -o proxy && tar zcfv "${REL
 CGO_ENABLED=0 GOOS=linux GOARCH=arm64 GOARM=7 go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-arm64-v7.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=arm GOARM=5 go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-arm-v5.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=arm64 GOARM=5 go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-arm64-v5.tar.gz" proxy direct blocked 
+CGO_ENABLED=0 GOOS=linux GOARCH=arm64 go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-arm64-v8.tar.gz" proxy direct blocked 
+CGO_ENABLED=0 GOOS=linux GOARCH=arm go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-arm-v8.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=mips go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mips.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=mips64 go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mips64.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=mips64le go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mips64le.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=mipsle go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mipsle.tar.gz" proxy direct blocked 
+CGO_ENABLED=0 GOOS=linux GOARCH=mips GOMIPS=softfloat go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mips-softfloat.tar.gz" proxy direct blocked 
+CGO_ENABLED=0 GOOS=linux GOARCH=mips64 GOMIPS=softfloat go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mips64-softfloat.tar.gz" proxy direct blocked 
+CGO_ENABLED=0 GOOS=linux GOARCH=mips64le GOMIPS=softfloat go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mips64le-softfloat.tar.gz" proxy direct blocked 
+CGO_ENABLED=0 GOOS=linux GOARCH=mipsle GOMIPS=softfloat go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-mipsle-softfloat.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=ppc64 go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-ppc64.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=ppc64le go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-ppc64le.tar.gz" proxy direct blocked 
 CGO_ENABLED=0 GOOS=linux GOARCH=s390x go build -o proxy && tar zcfv "${RELEASE}/proxy-linux-s390x.tar.gz" proxy direct blocked 

services/mux/mux_client.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	logger "log"
 	"net"
+	"strings"
 	"time"
 
 	"github.com/golang/snappy"
@@ -31,12 +32,21 @@ type MuxClientArgs struct {
 	KCP          kcpcfg.KCPConfigArgs
 	Jumper       *string
 }
+type ClientUDPConnItem struct {
+	conn      *smux.Stream
+	touchtime int64
+	srcAddr   *net.UDPAddr
+	localAddr *net.UDPAddr
+	udpConn   *net.UDPConn
+	connid    string
+}
 type MuxClient struct {
 	cfg      MuxClientArgs
 	isStop   bool
 	sessions utils.ConcurrentMap
 	log      *logger.Logger
 	jumper   *jumper.Jumper
+	udpConns utils.ConcurrentMap
 }
 
 func NewMuxClient() services.Service {
@@ -44,10 +54,12 @@ func NewMuxClient() services.Service {
 		cfg:      MuxClientArgs{},
 		isStop:   false,
 		sessions: utils.NewConcurrentMap(),
+		udpConns: utils.NewConcurrentMap(),
 	}
 }
 
 func (s *MuxClient) InitService() (err error) {
+	s.UDPGCDeamon()
 	return
 }
 
@@ -178,7 +190,7 @@ func (s *MuxClient) Start(args interface{}, log *logger.Logger) (err error) {
 							stream.Close()
 							return
 						}
-						s.log.Printf("worker[%d] signal revecived,server %s stream %s %s", i, serverID, ID, clientLocalAddr)
+						//s.log.Printf("worker[%d] signal revecived,server %s stream %s %s", i, serverID, ID, clientLocalAddr)
 						protocol := clientLocalAddr[:3]
 						localAddr := clientLocalAddr[4:]
 						if protocol == "udp" {
@@ -228,76 +240,130 @@ func (s *MuxClient) getParentConn() (conn net.Conn, err error) {
 	return
 }
 func (s *MuxClient) ServeUDP(inConn *smux.Stream, localAddr, ID string) {
-
+	var item *ClientUDPConnItem
+	var body []byte
+	var err error
+	srcAddr := ""
+	defer func() {
+		if item != nil {
+			(*item).conn.Close()
+			(*item).udpConn.Close()
+			s.udpConns.Remove(srcAddr)
+			inConn.Close()
+		}
+	}()
 	for {
 		if s.isStop {
 			return
 		}
-		inConn.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+		srcAddr, body, err = utils.ReadUDPPacket(inConn)
-		srcAddr, body, err := utils.ReadUDPPacket(inConn)
-		inConn.SetDeadline(time.Time{})
 		if err != nil {
-			s.log.Printf("udp packet revecived fail, err: %s", err)
+			if strings.Contains(err.Error(), "n != int(") {
-			s.log.Printf("connection %s released", ID)
+				continue
+			}
+			if !utils.IsNetDeadlineErr(err) && err != io.EOF {
+				s.log.Printf("udp packet revecived from bridge fail, err: %s", err)
+			}
+			return
+		}
+		if v, ok := s.udpConns.Get(srcAddr); !ok {
+			_srcAddr, _ := net.ResolveUDPAddr("udp", srcAddr)
+			zeroAddr, _ := net.ResolveUDPAddr("udp", ":")
+			_localAddr, _ := net.ResolveUDPAddr("udp", localAddr)
+			c, err := net.DialUDP("udp", zeroAddr, _localAddr)
+			if err != nil {
+				s.log.Printf("create local udp conn fail, err : %s", err)
 				inConn.Close()
-			break
+				return
+			}
+			item = &ClientUDPConnItem{
+				conn:      inConn,
+				srcAddr:   _srcAddr,
+				localAddr: _localAddr,
+				udpConn:   c,
+				connid:    ID,
+			}
+			s.udpConns.Set(srcAddr, item)
+			s.UDPRevecive(srcAddr, ID)
 		} else {
-			//s.log.Printf("udp packet revecived:%s,%v", srcAddr, body)
+			item = v.(*ClientUDPConnItem)
-			go func() {
-				defer func() {
-					if e := recover(); e != nil {
-						s.log.Printf("client processUDPPacket crashed,err: %s", e)
-					}
-				}()
-				s.processUDPPacket(inConn, srcAddr, localAddr, body)
-			}()
-
-		}
-
 		}
+		(*item).touchtime = time.Now().Unix()
+		go (*item).udpConn.Write(body)
+		//_, err = (*item).udpConn.Write(body)
+		// if err != nil {
+		// 	s.log.Printf("send udp packet to %s fail, err : %s", item.localAddr, err)
+		// 	return
 		// }
 	}
-func (s *MuxClient) processUDPPacket(inConn *smux.Stream, srcAddr, localAddr string, body []byte) {
+}
-	dstAddr, err := net.ResolveUDPAddr("udp", localAddr)
+func (s *MuxClient) UDPRevecive(key, ID string) {
-	if err != nil {
+	go func() {
-		s.log.Printf("can't resolve address: %s", err)
+		s.log.Printf("udp conn %s connected", ID)
-		inConn.Close()
+		v, ok := s.udpConns.Get(key)
+		if !ok {
+			s.log.Printf("[warn] udp conn not exists for %s, connid : %s", key, ID)
 			return
 		}
-	clientSrcAddr := &net.UDPAddr{IP: net.IPv4zero, Port: 0}
+		cui := v.(*ClientUDPConnItem)
-	conn, err := net.DialUDP("udp", clientSrcAddr, dstAddr)
+		buf := utils.LeakyBuffer.Get()
+		defer func() {
+			utils.LeakyBuffer.Put(buf)
+			cui.conn.Close()
+			cui.udpConn.Close()
+			s.udpConns.Remove(key)
+			s.log.Printf("udp conn %s released", ID)
+		}()
+		for {
+			n, err := cui.udpConn.Read(buf)
 			if err != nil {
-		s.log.Printf("connect to udp %s fail,ERR:%s", dstAddr.String(), err)
+				if !utils.IsNetClosedErr(err) {
+					s.log.Printf("udp conn read udp packet fail , err: %s ", err)
+				}
 				return
 			}
-	conn.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+			cui.touchtime = time.Now().Unix()
-	_, err = conn.Write(body)
+			go func() {
-	conn.SetDeadline(time.Time{})
+				cui.conn.SetWriteDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+				_, err = cui.conn.Write(utils.UDPPacket(cui.srcAddr.String(), buf[:n]))
+				cui.conn.SetWriteDeadline(time.Time{})
 				if err != nil {
-		s.log.Printf("send udp packet to %s fail,ERR:%s", dstAddr.String(), err)
+					cui.udpConn.Close()
 					return
 				}
-	//s.log.Printf("send udp packet to %s success", dstAddr.String())
+			}()
-	buf := make([]byte, 1024)
+			// _, err = cui.conn.Write(utils.UDPPacket(cui.srcAddr.String(), buf[:n]))
-	conn.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+			// if err != nil {
-	length, _, err := conn.ReadFromUDP(buf)
+			// 	s.log.Printf("send udp packet to bridge fail, err : %s", err)
-	conn.SetDeadline(time.Time{})
+			// 	return
-	if err != nil {
+			// }
-		s.log.Printf("read udp response from %s fail ,ERR:%s", dstAddr.String(), err)
+		}
+	}()
+}
+func (s *MuxClient) UDPGCDeamon() {
+	gctime := int64(30)
+	go func() {
+		if s.isStop {
 			return
 		}
-	respBody := buf[0:length]
+		timer := time.NewTicker(time.Second)
-	//s.log.Printf("revecived udp packet from %s , %v", dstAddr.String(), respBody)
+		for {
-	bs := utils.UDPPacket(srcAddr, respBody)
+			<-timer.C
-	(*inConn).SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+			gcKeys := []string{}
-	_, err = (*inConn).Write(bs)
+			s.udpConns.IterCb(func(key string, v interface{}) {
-	(*inConn).SetDeadline(time.Time{})
+				if time.Now().Unix()-v.(*ClientUDPConnItem).touchtime > gctime {
-	if err != nil {
+					(*(v.(*ClientUDPConnItem).conn)).Close()
-		s.log.Printf("send udp response fail ,ERR:%s", err)
+					(v.(*ClientUDPConnItem).udpConn).Close()
-		inConn.Close()
+					gcKeys = append(gcKeys, key)
-		return
+					s.log.Printf("gc udp conn %s", v.(*ClientUDPConnItem).connid)
 				}
-	//s.log.Printf("send udp response success ,from:%s ,%d ,%v", dstAddr.String(), len(bs), bs)
+			})
+			for _, k := range gcKeys {
+				s.udpConns.Remove(k)
+			}
+			gcKeys = nil
+		}
+	}()
 }
 func (s *MuxClient) ServeConn(inConn *smux.Stream, localAddr, ID string) {
 	var err error

services/mux/mux_server.go

@@ -42,15 +42,20 @@ type MuxServerArgs struct {
 	Jumper       *string
 }
 
-type MuxUDPItem struct {
+type MuxUDPPacketItem struct {
 	packet    *[]byte
 	localAddr *net.UDPAddr
 	srcAddr   *net.UDPAddr
 }
-
+type UDPConnItem struct {
+	conn      *net.Conn
+	touchtime int64
+	srcAddr   *net.UDPAddr
+	localAddr *net.UDPAddr
+	connid    string
+}
 type MuxServerManager struct {
 	cfg      MuxServerArgs
-	udpChn   chan MuxUDPItem
 	serverID string
 	servers  []*services.Service
 	log      *logger.Logger
@@ -59,7 +64,6 @@ type MuxServerManager struct {
 func NewMuxServerManager() services.Service {
 	return &MuxServerManager{
 		cfg:      MuxServerArgs{},
-		udpChn:   make(chan MuxUDPItem, 50000),
 		serverID: utils.Uniqueid(),
 		servers:  []*services.Service{},
 	}
@@ -160,23 +164,24 @@ func (s *MuxServerManager) InitService() (err error) {
 
 type MuxServer struct {
 	cfg      MuxServerArgs
-	udpChn   chan MuxUDPItem
 	sc       utils.ServerChannel
 	sessions utils.ConcurrentMap
 	lockChn  chan bool
 	isStop   bool
-	udpConn  *net.Conn
 	log      *logger.Logger
 	jumper   *jumper.Jumper
+	udpConns utils.ConcurrentMap
+	// writelock *sync.Mutex
 }
 
 func NewMuxServer() services.Service {
 	return &MuxServer{
 		cfg:      MuxServerArgs{},
-		udpChn:   make(chan MuxUDPItem, 50000),
 		lockChn:  make(chan bool, 1),
 		sessions: utils.NewConcurrentMap(),
 		isStop:   false,
+		udpConns: utils.NewConcurrentMap(),
+		// writelock: &sync.Mutex{},
 	}
 }
 
@@ -199,12 +204,9 @@ func (s *MuxServer) StopService() {
 	if s.sc.UDPListener != nil {
 		(*s.sc.UDPListener).Close()
 	}
-	if s.udpConn != nil {
-		(*s.udpConn).Close()
-	}
 }
 func (s *MuxServer) InitService() (err error) {
-	s.UDPConnDeamon()
+	s.UDPGCDeamon()
 	return
 }
 func (s *MuxServer) CheckArgs() (err error) {
@@ -242,11 +244,7 @@ func (s *MuxServer) Start(args interface{}, log *logger.Logger) (err error) {
 	s.sc = utils.NewServerChannel(host, p, s.log)
 	if *s.cfg.IsUDP {
 		err = s.sc.ListenUDP(func(packet []byte, localAddr, srcAddr *net.UDPAddr) {
-			s.udpChn <- MuxUDPItem{
+			s.UDPSend(packet, localAddr, srcAddr)
-				packet:    &packet,
-				localAddr: localAddr,
-				srcAddr:   srcAddr,
-			}
 		})
 		if err != nil {
 			return
@@ -317,7 +315,9 @@ func (s *MuxServer) GetOutConn() (outConn net.Conn, ID string, err error) {
 	}
 	outConn, err = s.GetConn(fmt.Sprintf("%d", i))
 	if err != nil {
+		if !strings.Contains(err.Error(), "can not connect at same time") {
 			s.log.Printf("connection err: %s", err)
+		}
 		return
 	}
 	remoteAddr := "tcp:" + *s.cfg.Remote
@@ -424,87 +424,111 @@ func (s *MuxServer) getParentConn() (conn net.Conn, err error) {
 	}
 	return
 }
-func (s *MuxServer) UDPConnDeamon() {
+func (s *MuxServer) UDPGCDeamon() {
+	gctime := int64(30)
 	go func() {
-		defer func() {
+		if s.isStop {
-			if err := recover(); err != nil {
+			return
-				s.log.Printf("udp conn deamon crashed with err : %s \nstack: %s", err, string(debug.Stack()))
+		}
+		timer := time.NewTicker(time.Second)
+		for {
+			<-timer.C
+			gcKeys := []string{}
+			s.udpConns.IterCb(func(key string, v interface{}) {
+				if time.Now().Unix()-v.(*UDPConnItem).touchtime > gctime {
+					(*(v.(*UDPConnItem).conn)).Close()
+					gcKeys = append(gcKeys, key)
+					s.log.Printf("gc udp conn %s", v.(*UDPConnItem).connid)
+				}
+			})
+			for _, k := range gcKeys {
+				s.udpConns.Remove(k)
+			}
+			gcKeys = nil
 		}
 	}()
-		var outConn net.Conn
+}
-		var ID string
+func (s *MuxServer) UDPSend(data []byte, localAddr, srcAddr *net.UDPAddr) {
-		var err error
+	var (
+		uc      *UDPConnItem
+		key     = srcAddr.String()
+		ID      string
+		err     error
+		outconn net.Conn
+	)
+	v, ok := s.udpConns.Get(key)
+	if !ok {
 		for {
-			if s.isStop {
+			outconn, ID, err = s.GetOutConn()
-				return
+			if err != nil && strings.Contains(err.Error(), "can not connect at same time") {
-			}
+				time.Sleep(time.Millisecond * 500)
-			item := <-s.udpChn
-		RETRY:
-			if s.isStop {
-				return
-			}
-			if outConn == nil {
-				for {
-					if s.isStop {
-						return
-					}
-					outConn, ID, err = s.GetOutConn()
-					if err != nil {
-						outConn = nil
-						utils.CloseConn(&outConn)
-						s.log.Printf("connect to %s fail, err: %s, retrying...", *s.cfg.Parent, err)
-						time.Sleep(time.Second * 3)
 				continue
 			} else {
-						go func(outConn net.Conn, ID string) {
+				break
-							if s.udpConn != nil {
-								(*s.udpConn).Close()
 			}
-							s.udpConn = &outConn
+		}
-							for {
+		if err != nil {
-								if s.isStop {
+			s.log.Printf("connect to %s fail, err: %s", *s.cfg.Parent, err)
 			return
 		}
-								outConn.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+		uc = &UDPConnItem{
-								srcAddrFromConn, body, err := utils.ReadUDPPacket(outConn)
+			conn:      &outconn,
-								outConn.SetDeadline(time.Time{})
+			srcAddr:   srcAddr,
+			localAddr: localAddr,
+			connid:    ID,
+		}
+		s.udpConns.Set(key, uc)
+		s.UDPRevecive(key, ID)
+	} else {
+		uc = v.(*UDPConnItem)
+	}
+	go func() {
+		defer func() {
+			if e := recover(); e != nil {
+				(*uc.conn).Close()
+				s.udpConns.Remove(key)
+				s.log.Printf("udp sender crashed with error : %s", e)
+			}
+		}()
+		uc.touchtime = time.Now().Unix()
+		(*uc.conn).SetWriteDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+		_, err = (*uc.conn).Write(utils.UDPPacket(srcAddr.String(), data))
+		(*uc.conn).SetWriteDeadline(time.Time{})
 		if err != nil {
-									s.log.Printf("parse revecived udp packet fail, err: %s ,%v", err, body)
+			s.log.Printf("write udp packet to %s fail ,flush err:%s ", *s.cfg.Parent, err)
-									s.log.Printf("UDP deamon connection %s exited", ID)
+		}
-									break
+	}()
-								}
+}
-								//s.log.Printf("udp packet revecived over parent , local:%s", srcAddrFromConn)
+func (s *MuxServer) UDPRevecive(key, ID string) {
-								_srcAddr := strings.Split(srcAddrFromConn, ":")
+	go func() {
-								if len(_srcAddr) != 2 {
+		s.log.Printf("udp conn %s connected", ID)
-									s.log.Printf("parse revecived udp packet fail, addr error : %s", srcAddrFromConn)
+		var uc *UDPConnItem
-									continue
+		defer func() {
-								}
+			if uc != nil {
-								port, _ := strconv.Atoi(_srcAddr[1])
+				(*uc.conn).Close()
-								dstAddr := &net.UDPAddr{IP: net.ParseIP(_srcAddr[0]), Port: port}
+			}
-								s.sc.UDPListener.SetDeadline(time.Now().Add(time.Millisecond * time.Duration(*s.cfg.Timeout)))
+			s.udpConns.Remove(key)
-								_, err = s.sc.UDPListener.WriteToUDP(body, dstAddr)
+			s.log.Printf("udp conn %s released", ID)
-								s.sc.UDPListener.SetDeadline(time.Time{})
+		}()
-								if err != nil {
+		v, ok := s.udpConns.Get(key)
-									s.log.Printf("udp response to local %s fail,ERR:%s", srcAddrFromConn, err)
+		if !ok {
-									continue
+			s.log.Printf("[warn] udp conn not exists for %s, connid : %s", key, ID)
-								}
+			return
-								//s.log.Printf("udp response to local %s success , %v", srcAddrFromConn, body)
+		}
-							}
+		uc = v.(*UDPConnItem)
-						}(outConn, ID)
+		for {
-						break
+			_, body, err := utils.ReadUDPPacket(*uc.conn)
-					}
+			if err != nil {
-				}
+				if strings.Contains(err.Error(), "n != int(") {
-			}
+					continue
-			outConn.SetWriteDeadline(time.Now().Add(time.Second))
+				}
-			_, err = outConn.Write(utils.UDPPacket(item.srcAddr.String(), *item.packet))
+				if err != io.EOF {
-			outConn.SetWriteDeadline(time.Time{})
+					s.log.Printf("udp conn read udp packet fail , err: %s ", err)
-			if err != nil {
+				}
-				utils.CloseConn(&outConn)
+				return
-				outConn = nil
+			}
-				s.log.Printf("write udp packet to %s fail ,flush err:%s ,retrying...", *s.cfg.Parent, err)
+			uc.touchtime = time.Now().Unix()
-				goto RETRY
+			go s.sc.UDPListener.WriteToUDP(body, uc.srcAddr)
-			}
-			//s.log.Printf("write packet %v", *item.packet)
 		}
 	}()
 }

services/service.go

@@ -39,6 +39,7 @@ func GetService(name string) *ServiceItem {
 func Stop(name string) {
 	if s, ok := servicesMap.Load(name); ok && s.(*ServiceItem).S != nil {
 		s.(*ServiceItem).S.Clean()
+		servicesMap.Delete(name)
 	}
 }
 func Run(name string, args interface{}) (service *ServiceItem, err error) {

services/sps/sps.go

@@ -345,7 +345,10 @@ func (s *SPS) OutToTCP(inConn *net.Conn) (err error) {
 			isHTTPS = true
 			pb.Write([]byte(fmt.Sprintf("CONNECT %s HTTP/1.1\r\n", address)))
 		}
+		pb.WriteString(fmt.Sprintf("Host: %s\r\n", address))
+		pb.WriteString(fmt.Sprintf("Proxy-Host: %s\r\n", address))
 		pb.WriteString("Proxy-Connection: Keep-Alive\r\n")
+		pb.WriteString("Connection: Keep-Alive\r\n")
 
 		u := ""
 		if *s.cfg.ParentAuth != "" {

utils/functions.go

@@ -585,6 +585,26 @@ func RemoveProxyHeaders(head []byte) []byte {
 func InsertProxyHeaders(head []byte, headers string) []byte {
 	return bytes.Replace(head, []byte("\r\n"), []byte("\r\n"+headers), 1)
 }
+func IsNetClosedErr(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "use of closed network connection")
+}
+func IsNetTimeoutErr(err error) bool {
+	if err == nil {
+		return false
+	}
+	e, ok := err.(net.Error)
+	return ok && e.Timeout()
+}
+func IsNetDeadlineErr(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "i/o deadline reached")
+}
+
+func IsNetRefusedErr(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "connection refused")
+}
+func IsNetSocketNotConnectedErr(err error) bool {
+	return err != nil && strings.Contains(err.Error(), "socket is not connected")
+}
 
 // type sockaddr struct {
 // 	family uint16

utils/jumper/jumper.go

@@ -51,7 +51,10 @@ func (j *Jumper) dialHTTPS(address string, timeout time.Duration) (conn net.Conn
 	}
 	pb := new(bytes.Buffer)
 	pb.Write([]byte(fmt.Sprintf("CONNECT %s HTTP/1.1\r\n", address)))
+	pb.WriteString(fmt.Sprintf("Host: %s\r\n", address))
+	pb.WriteString(fmt.Sprintf("Proxy-Host: %s\r\n", address))
 	pb.WriteString("Proxy-Connection: Keep-Alive\r\n")
+	pb.WriteString("Connection: Keep-Alive\r\n")
 	if j.proxyURL.User != nil {
 		p, _ := j.proxyURL.User.Password()
 		u := fmt.Sprintf("%s:%s", j.proxyURL.User.Username(), p)