Fix socks5 UDP implementation

protocol/http/inbound.go

@@ -91,7 +91,7 @@ func (h *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata a
 			return
 		}
 	}
-	err = http.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), h.authenticator, nil, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
+	err = http.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), h.authenticator, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
 	if err != nil {
 		N.CloseOnHandshakeFailure(conn, onClose, err)
 		h.logger.ErrorContext(ctx, E.Cause(err, "process connection from ", metadata.Source))

protocol/mixed/inbound.go

@@ -85,9 +85,9 @@ func (h *Inbound) newConnection(ctx context.Context, conn net.Conn, metadata ada
 	}
 	switch headerBytes[0] {
 	case socks4.Version, socks5.Version:
-		return socks.HandleConnectionEx(ctx, conn, reader, h.authenticator, nil, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, metadata.Destination, onClose)
+		return socks.HandleConnectionEx(ctx, conn, reader, h.authenticator, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
 	default:
-		return http.HandleConnectionEx(ctx, conn, reader, h.authenticator, nil, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
+		return http.HandleConnectionEx(ctx, conn, reader, h.authenticator, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
 	}
 }
 
@@ -110,11 +110,19 @@ func (h *Inbound) streamUserPacketConnection(ctx context.Context, conn N.PacketC
 	metadata.InboundType = h.Type()
 	user, loaded := auth.UserFromContext[string](ctx)
 	if !loaded {
-		h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
+		if !metadata.Destination.IsValid() {
+			h.logger.InfoContext(ctx, "inbound packet connection")
+		} else {
+			h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
+		}
 		h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
 		return
 	}
 	metadata.User = user
-	h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
+	if !metadata.Destination.IsValid() {
+		h.logger.InfoContext(ctx, "[", user, "] inbound packet connection")
+	} else {
+		h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
+	}
 	h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
 }

protocol/socks/inbound.go

@@ -62,7 +62,7 @@ func (h *Inbound) Close() error {
 }
 
 func (h *Inbound) NewConnectionEx(ctx context.Context, conn net.Conn, metadata adapter.InboundContext, onClose N.CloseHandlerFunc) {
-	err := socks.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), h.authenticator, nil, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, metadata.Destination, onClose)
+	err := socks.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), h.authenticator, adapter.NewUpstreamHandlerEx(metadata, h.newUserConnection, h.streamUserPacketConnection), metadata.Source, onClose)
 	N.CloseOnHandshakeFailure(conn, onClose, err)
 	if err != nil {
 		if E.IsClosedOrCanceled(err) {
@@ -92,11 +92,19 @@ func (h *Inbound) streamUserPacketConnection(ctx context.Context, conn N.PacketC
 	metadata.InboundType = h.Type()
 	user, loaded := auth.UserFromContext[string](ctx)
 	if !loaded {
-		h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
+		if !metadata.Destination.IsValid() {
+			h.logger.InfoContext(ctx, "inbound packet connection")
+		} else {
+			h.logger.InfoContext(ctx, "inbound packet connection to ", metadata.Destination)
+		}
 		h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
 		return
 	}
 	metadata.User = user
-	h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
+	if !metadata.Destination.IsValid() {
+		h.logger.InfoContext(ctx, "[", user, "] inbound packet connection")
+	} else {
+		h.logger.InfoContext(ctx, "[", user, "] inbound packet connection to ", metadata.Destination)
+	}
 	h.router.RoutePacketConnectionEx(ctx, conn, metadata, onClose)
 }

protocol/tor/proxy.go

@@ -99,7 +99,7 @@ func (l *ProxyListener) acceptLoop() {
 }
 
 func (l *ProxyListener) accept(ctx context.Context, conn *net.TCPConn) error {
-	return socks.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), l.authenticator, nil, l, M.SocksaddrFromNet(conn.RemoteAddr()), M.Socksaddr{}, nil)
+	return socks.HandleConnectionEx(ctx, conn, std_bufio.NewReader(conn), l.authenticator, l, M.SocksaddrFromNet(conn.RemoteAddr()), nil)
 }
 
 func (l *ProxyListener) NewConnectionEx(ctx context.Context, conn net.Conn, source M.Socksaddr, destination M.Socksaddr, onClose N.CloseHandlerFunc) {

route/route.go

@@ -461,8 +461,12 @@ match:
 			break match
 		}
 	}
-	if !preMatch && metadata.Destination.Addr.IsUnspecified() {
-		newBuffer, newPacketBuffers, newErr := r.actionSniff(ctx, metadata, &rule.RuleActionSniff{}, inputConn, inputPacketConn)
+	if !preMatch && inputPacketConn != nil && !metadata.Destination.IsFqdn() && !metadata.Destination.Addr.IsGlobalUnicast() {
+		var timeout time.Duration
+		if metadata.InboundType == C.TypeSOCKS {
+			timeout = C.TCPTimeout
+		}
+		newBuffer, newPacketBuffers, newErr := r.actionSniff(ctx, metadata, &rule.RuleActionSniff{Timeout: timeout}, inputConn, inputPacketConn)
 		if newErr != nil {
 			fatalErr = newErr
 			return
@@ -558,8 +562,7 @@ func (r *Router) actionSniff(
 					return
 				}
 			} else {
-				// TODO: maybe always override destination
-				if metadata.Destination.Addr.IsUnspecified() {
+				if !metadata.Destination.Addr.IsGlobalUnicast() {
 					metadata.Destination = destination
 				}
 				if len(packetBuffers) > 0 {