fix: wrong source and destination

app/tun/handler.go

@@ -1,31 +1,18 @@
 package tun
 
 import (
-	"github.com/v2fly/v2ray-core/v5/common/net"
-	"gvisor.dev/gvisor/pkg/tcpip/stack"
+	tun_net "github.com/v2fly/v2ray-core/v5/app/tun/net"
 )
 
 var (
-	tcpQueue = make(chan TCPConn)
-	udpQueue = make(chan UDPConn)
+	tcpQueue = make(chan tun_net.TCPConn)
+	udpQueue = make(chan tun_net.UDPConn)
 )
 
-type TCPConn interface {
-	net.Conn
-
-	ID() *stack.TransportEndpointID
-}
-
-type UDPConn interface {
-	net.Conn
-
-	ID() *stack.TransportEndpointID
-}
-
-func handleTCP(conn TCPConn) {
+func handleTCP(conn tun_net.TCPConn) {
 	tcpQueue <- conn
 }
 
-func handleUDP(conn UDPConn) {
+func handleUDP(conn tun_net.UDPConn) {
 	udpQueue <- conn
 }

app/tun/handler_tcp.go

@@ -3,6 +3,7 @@ package tun
 import (
 	"context"
 
+	tun_net "github.com/v2fly/v2ray-core/v5/app/tun/net"
 	"github.com/v2fly/v2ray-core/v5/common"
 	"github.com/v2fly/v2ray-core/v5/common/buf"
 	"github.com/v2fly/v2ray-core/v5/common/log"
@@ -41,7 +42,7 @@ type TCPHandler struct {
 	stack *stack.Stack
 }
 
-func HandleTCP(handle func(TCPConn)) StackOption {
+func HandleTCP(handle func(tun_net.TCPConn)) StackOption {
 	return func(s *stack.Stack) error {
 		tcpForwarder := tcp.NewForwarder(s, rcvWnd, maxInFlight, func(r *tcp.ForwarderRequest) {
 			wg := new(waiter.Queue)
@@ -80,7 +81,7 @@ func HandleTCP(handle func(TCPConn)) StackOption {
 	}
 }
 
-func (h *TCPHandler) HandleQueue(ch chan TCPConn) {
+func (h *TCPHandler) HandleQueue(ch chan tun_net.TCPConn) {
 	for {
 		select {
 		case conn := <-ch:
@@ -93,15 +94,16 @@ func (h *TCPHandler) HandleQueue(ch chan TCPConn) {
 	}
 }
 
-func (h *TCPHandler) Handle(conn TCPConn) error {
+func (h *TCPHandler) Handle(conn tun_net.TCPConn) error {
+	defer conn.Close()
+	id := conn.ID()
 	ctx := session.ContextWithInbound(h.ctx, &session.Inbound{Tag: h.config.Tag})
 	sessionPolicy := h.policyManager.ForLevel(h.config.UserLevel)
 
-	addr := conn.RemoteAddr()
-
-	dest := net.DestinationFromAddr(addr)
-	ctx = log.ContextWithAccessMessage(h.ctx, &log.AccessMessage{
-		From:   addr,
+	dest := net.TCPDestination(tun_net.AddressFromTCPIPAddr(id.LocalAddress), net.Port(id.LocalPort))
+	src := net.TCPDestination(tun_net.AddressFromTCPIPAddr(id.RemoteAddress), net.Port(id.RemotePort))
+	ctx = log.ContextWithAccessMessage(ctx, &log.AccessMessage{
+		From:   src, // Parse IpAddr to Destination
 		To:     dest,
 		Status: log.AccessAccepted,
 		Reason: "",

app/tun/handler_udp.go

@@ -3,6 +3,7 @@ package tun
 import (
 	"context"
 
+	tun_net "github.com/v2fly/v2ray-core/v5/app/tun/net"
 	"github.com/v2fly/v2ray-core/v5/common/buf"
 	"github.com/v2fly/v2ray-core/v5/common/net"
 	"github.com/v2fly/v2ray-core/v5/common/net/packetaddr"
@@ -35,7 +36,7 @@ func (c *udpConn) ID() *stack.TransportEndpointID {
 	return &c.id
 }
 
-func HandleUDP(handle func(UDPConn)) StackOption {
+func HandleUDP(handle func(tun_net.UDPConn)) StackOption {
 	return func(s *stack.Stack) error {
 		udpForwarder := gvisor_udp.NewForwarder(s, func(r *gvisor_udp.ForwarderRequest) {
 			wg := new(waiter.Queue)
@@ -57,7 +58,7 @@ func HandleUDP(handle func(UDPConn)) StackOption {
 	}
 }
 
-func (h *UDPHandler) HandleQueue(ch chan UDPConn) {
+func (h *UDPHandler) HandleQueue(ch chan tun_net.UDPConn) {
 	for {
 		select {
 		case <-h.ctx.Done():
@@ -70,7 +71,9 @@ func (h *UDPHandler) HandleQueue(ch chan UDPConn) {
 	}
 }
 
-func (h *UDPHandler) Handle(conn UDPConn) error {
+func (h *UDPHandler) Handle(conn tun_net.UDPConn) error {
+	defer conn.Close()
+	id := conn.ID()
 	ctx := session.ContextWithInbound(h.ctx, &session.Inbound{Tag: h.config.Tag})
 	packetConn := conn.(net.PacketConn)
 
@@ -83,10 +86,13 @@ func (h *UDPHandler) Handle(conn UDPConn) error {
 		udpDispatcherConstructor = packetAddrDispatcherFactory.NewPacketAddrDispatcher
 	}
 
+	dest := net.UDPDestination(tun_net.AddressFromTCPIPAddr(id.LocalAddress), net.Port(id.LocalPort))
+	src := net.UDPDestination(tun_net.AddressFromTCPIPAddr(id.RemoteAddress), net.Port(id.RemotePort))
+
 	udpServer := udpDispatcherConstructor(h.dispatcher, func(ctx context.Context, packet *udp_proto.Packet) {
 		if _, err := packetConn.WriteTo(packet.Payload.Bytes(), &net.UDPAddr{
-			IP:   packet.Source.Address.IP(),
-			Port: int(packet.Source.Port),
+			IP:   src.Address.IP(),
+			Port: int(src.Port),
 		}); err != nil {
 			newError("failed to write UDP packet").Base(err).WriteToLog()
 		}
@@ -98,13 +104,13 @@ func (h *UDPHandler) Handle(conn UDPConn) error {
 			return nil
 		default:
 			var buffer [2048]byte
-			n, addr, err := packetConn.ReadFrom(buffer[:])
+			n, _, err := packetConn.ReadFrom(buffer[:])
 			if err != nil {
 				return newError("failed to read UDP packet").Base(err)
 			}
 			currentPacketCtx := ctx
 
-			udpServer.Dispatch(currentPacketCtx, net.DestinationFromAddr(addr), buf.FromBytes(buffer[:n]))
+			udpServer.Dispatch(currentPacketCtx, dest, buf.FromBytes(buffer[:n]))
 		}
 	}
 }

app/tun/net/net.go

@@ -0,0 +1,24 @@
+package net
+
+import (
+	"github.com/v2fly/v2ray-core/v5/common/net"
+
+	"gvisor.dev/gvisor/pkg/tcpip"
+	"gvisor.dev/gvisor/pkg/tcpip/stack"
+)
+
+type TCPConn interface {
+	net.Conn
+
+	ID() *stack.TransportEndpointID
+}
+
+type UDPConn interface {
+	net.Conn
+
+	ID() *stack.TransportEndpointID
+}
+
+func AddressFromTCPIPAddr(addr tcpip.Address) net.Address {
+	return net.IPAddress(addr.AsSlice())
+}