实现tproxy,添加tproxy示例文件.未经测试,很可能有问题.

tproxy_linux.go

@@ -0,0 +1,78 @@
+package main
+
+import (
+	"go.uber.org/zap"
+	"net"
+
+	"github.com/hahahrfool/v2ray_simple/netLayer"
+	"github.com/hahahrfool/v2ray_simple/netLayer/tproxy"
+	"github.com/hahahrfool/v2ray_simple/utils"
+)
+
+func listenTproxy(addr string) {
+	utils.Info("Start running Tproxy ")
+
+	ad, err := netLayer.NewAddr(addr)
+	if err != nil {
+		panic(err)
+	}
+	var tp TProxy = TProxy(ad)
+	go tp.StartLoopTCP()
+	go tp.StartLoopUDP()
+
+	tproxyListenCount++
+}
+
+var tproxyList []TProxy
+
+//tproxy因为比较特殊, 不属于 proxy.Server, 需要独特的转发过程去处理.
+type TProxy netLayer.Addr
+
+func (tp TProxy) StartLoop() {
+	tp.StartLoopTCP()
+}
+
+func (tp TProxy) StartLoopTCP() {
+	ad := netLayer.Addr(tp)
+	netLayer.ListenAndAccept("tcp", ad.String(), &netLayer.Sockopt{TProxy: true}, func(conn net.Conn) {
+		tcpconn := conn.(*net.TCPConn)
+		targetAddr := tproxy.HandshakeTCP(tcpconn)
+
+		if ce := utils.CanLogErr("TProxy loop read got new tcp"); ce != nil {
+			ce.Write(zap.String("->", targetAddr.String()))
+		}
+
+		passToOutClient(incomingInserverConnState{
+			wrappedConn: tcpconn,
+		}, false, tcpconn, nil, targetAddr)
+	})
+
+}
+
+func (tp TProxy) StartLoopUDP() {
+	ad := netLayer.Addr(tp)
+	ad.Network = "udp"
+	conn, err := ad.DialWithOpt(&netLayer.Sockopt{TProxy: true})
+	if err != nil {
+		if ce := utils.CanLogErr("TProxy StartLoopUDP DialWithOpt failed"); ce != nil {
+			ce.Write(zap.Error(err))
+		}
+		return
+	}
+	udpConn := conn.(*net.UDPConn)
+	for {
+		msgConn, raddr, err := tproxy.HandshakeUDP(udpConn)
+		if err != nil {
+			if ce := utils.CanLogErr("TProxy StartLoopUDP loop read failed"); ce != nil {
+				ce.Write(zap.Error(err))
+			}
+			break
+		} else {
+			if ce := utils.CanLogErr("TProxy loop read got new udp"); ce != nil {
+				ce.Write(zap.String("->", raddr.String()))
+			}
+		}
+
+		go passToOutClient(incomingInserverConnState{}, false, nil, msgConn, raddr)
+	}
+}