fix:udp buf

server/proxy/udp.go

@@ -1,8 +1,11 @@
 package proxy
 
 import (
+	"io"
 	"net"
 	"strings"
+	"sync"
+	"time"
 
 	"ehang.io/nps/bridge"
 	"ehang.io/nps/lib/common"
@@ -13,6 +16,7 @@ import (
 
 type UdpModeServer struct {
 	BaseServer
+	addrMap  sync.Map
 	listener *net.UDPConn
 }
 
@@ -33,8 +37,8 @@ func (s *UdpModeServer) Start() error {
 	if err != nil {
 		return err
 	}
-	buf := common.BufPoolUdp.Get().([]byte)
 	for {
+		buf := common.BufPoolUdp.Get().([]byte)
 		n, addr, err := s.listener.ReadFromUDP(buf)
 		if err != nil {
 			if strings.Contains(err.Error(), "use of closed network connection") {
@@ -49,6 +53,13 @@ func (s *UdpModeServer) Start() error {
 }
 
 func (s *UdpModeServer) process(addr *net.UDPAddr, data []byte) {
+	if v, ok := s.addrMap.Load(addr.String()); ok {
+		clientConn, ok := v.(io.ReadWriteCloser)
+		if ok {
+			clientConn.Write(data)
+			s.task.Flow.Add(int64(len(data)), 0)
+		}
+	} else {
 		if err := s.CheckFlowAndConnNum(s.task.Client); err != nil {
 			logs.Warn("client id %d, task id %d,error %s, when udp connection", s.task.Client.Id, s.task.Id, err.Error())
 			return
@@ -59,13 +70,19 @@ func (s *UdpModeServer) process(addr *net.UDPAddr, data []byte) {
 			return
 		} else {
 			target := conn.GetConn(clientConn, s.task.Client.Cnf.Crypt, s.task.Client.Cnf.Compress, nil, true)
+			s.addrMap.Store(addr.String(), target)
 			defer target.Close()
-		s.task.Flow.Add(int64(len(data)), 0)
+
+			target.Write(data)
+
 			buf := common.BufPoolUdp.Get().([]byte)
 			defer common.BufPoolUdp.Put(buf)
-		target.Write(data)
+
 			s.task.Flow.Add(int64(len(data)), 0)
+			for {
+				clientConn.SetReadDeadline(time.Now().Add(time.Minute * 10))
 				if n, err := target.Read(buf); err != nil {
+					s.addrMap.Delete(addr.String())
 					logs.Warn(err)
 					return
 				} else {
@@ -74,6 +91,8 @@ func (s *UdpModeServer) process(addr *net.UDPAddr, data []byte) {
 				}
 			}
 		}
+	}
+}
 
 func (s *UdpModeServer) Close() error {
 	return s.listener.Close()