refine dispatcher

app/dispatcher/dispatcher.go

@@ -12,5 +12,5 @@ const (
 
 // PacketDispatcher dispatch a packet and possibly further network payload to its destination.
 type PacketDispatcher interface {
-	DispatchToOutbound(meta *proxy.InboundHandlerMeta, session *proxy.SessionInfo) ray.InboundRay
+	DispatchToOutbound(session *proxy.SessionInfo) ray.InboundRay
 }

app/dispatcher/impl/default.go

@@ -43,7 +43,7 @@ func (this *DefaultDispatcher) Release() {
 
 }
 
-func (this *DefaultDispatcher) DispatchToOutbound(meta *proxy.InboundHandlerMeta, session *proxy.SessionInfo) ray.InboundRay {
+func (this *DefaultDispatcher) DispatchToOutbound(session *proxy.SessionInfo) ray.InboundRay {
 	direct := ray.NewRay()
 	dispatcher := this.ohm.GetDefaultHandler()
 	destination := session.Destination
@@ -61,7 +61,7 @@ func (this *DefaultDispatcher) DispatchToOutbound(meta *proxy.InboundHandlerMeta
 		}
 	}
 
-	if meta.AllowPassiveConnection {
+	if session.Inbound != nil && session.Inbound.AllowPassiveConnection {
 		go dispatcher.Dispatch(destination, alloc.NewLocalBuffer(32).Clear(), direct)
 	} else {
 		go this.FilterPacketAndDispatch(destination, direct, dispatcher)

app/dispatcher/testing/dispatcher.go

@@ -30,7 +30,7 @@ func NewTestPacketDispatcher(handler func(destination v2net.Destination, traffic
 	}
 }
 
-func (this *TestPacketDispatcher) DispatchToOutbound(meta *proxy.InboundHandlerMeta, session *proxy.SessionInfo) ray.InboundRay {
+func (this *TestPacketDispatcher) DispatchToOutbound(session *proxy.SessionInfo) ray.InboundRay {
 	traffic := ray.NewRay()
 	this.Destination <- session.Destination
 	go this.Handler(session.Destination, traffic)

app/dns/nameserver.go

@@ -50,11 +50,9 @@ type UDPNameServer struct {
 
 func NewUDPNameServer(address v2net.Destination, dispatcher dispatcher.PacketDispatcher) *UDPNameServer {
 	s := &UDPNameServer{
-		address:  address,
-		requests: make(map[uint16]*PendingRequest),
-		udpServer: udp.NewUDPServer(&proxy.InboundHandlerMeta{
-			AllowPassiveConnection: false,
-		}, dispatcher),
+		address:   address,
+		requests:  make(map[uint16]*PendingRequest),
+		udpServer: udp.NewUDPServer(dispatcher),
 	}
 	return s
 }

proxy/dokodemo/dokodemo.go

@@ -90,7 +90,7 @@ func (this *DokodemoDoor) Start() error {
 }
 
 func (this *DokodemoDoor) ListenUDP() error {
-	this.udpServer = udp.NewUDPServer(this.meta, this.packetDispatcher)
+	this.udpServer = udp.NewUDPServer(this.packetDispatcher)
 	udpHub, err := udp.ListenUDP(
 		this.meta.Address, this.meta.Port, udp.ListenOption{
 			Callback:            this.handleUDPPackets,
@@ -114,6 +114,7 @@ func (this *DokodemoDoor) handleUDPPackets(payload *alloc.Buffer, session *proxy
 		log.Info("Dokodemo: Unknown destination, stop forwarding...")
 		return
 	}
+	session.Inbound = this.meta
 	this.udpServer.Dispatch(session, payload, this.handleUDPResponse)
 }
 
@@ -160,9 +161,10 @@ func (this *DokodemoDoor) HandleTCPConnection(conn internet.Connection) {
 	}
 	log.Info("Dokodemo: Handling request to ", dest)
 
-	ray := this.packetDispatcher.DispatchToOutbound(this.meta, &proxy.SessionInfo{
+	ray := this.packetDispatcher.DispatchToOutbound(&proxy.SessionInfo{
 		Source:      v2net.DestinationFromAddr(conn.RemoteAddr()),
 		Destination: dest,
+		Inbound:     this.meta,
 	})
 	defer ray.InboundOutput().Release()
 

proxy/http/server.go

@@ -124,6 +124,7 @@ func (this *Server) handleConnection(conn internet.Connection) {
 	session := &proxy.SessionInfo{
 		Source:      v2net.DestinationFromAddr(conn.RemoteAddr()),
 		Destination: dest,
+		Inbound:     this.meta,
 	}
 	if strings.ToUpper(request.Method) == "CONNECT" {
 		this.handleConnect(request, session, reader, conn)
@@ -146,7 +147,7 @@ func (this *Server) handleConnect(request *http.Request, session *proxy.SessionI
 	}
 	response.Write(writer)
 
-	ray := this.packetDispatcher.DispatchToOutbound(this.meta, session)
+	ray := this.packetDispatcher.DispatchToOutbound(session)
 	this.transport(reader, writer, ray)
 }
 
@@ -226,7 +227,7 @@ func (this *Server) handlePlainHTTP(request *http.Request, session *proxy.Sessio
 	request.Host = request.URL.Host
 	StripHopByHopHeaders(request)
 
-	ray := this.packetDispatcher.DispatchToOutbound(this.meta, session)
+	ray := this.packetDispatcher.DispatchToOutbound(session)
 	defer ray.InboundInput().Close()
 	defer ray.InboundOutput().Release()
 

proxy/proxy.go

@@ -20,6 +20,7 @@ type SessionInfo struct {
 	Source      v2net.Destination
 	Destination v2net.Destination
 	User        *protocol.User
+	Inbound     *InboundHandlerMeta
 }
 
 type InboundHandlerMeta struct {

proxy/shadowsocks/server.go

@@ -90,7 +90,7 @@ func (this *Server) Start() error {
 	this.tcpHub = tcpHub
 
 	if this.config.UdpEnabled {
-		this.udpServer = udp.NewUDPServer(this.meta, this.packetDispatcher)
+		this.udpServer = udp.NewUDPServer(this.packetDispatcher)
 		udpHub, err := udp.ListenUDP(this.meta.Address, this.meta.Port, udp.ListenOption{Callback: this.handlerUDPPayload})
 		if err != nil {
 			log.Error("Shadowsocks: Failed to listen UDP on ", this.meta.Address, ":", this.meta.Port, ": ", err)
@@ -130,7 +130,7 @@ func (this *Server) handlerUDPPayload(payload *alloc.Buffer, session *proxy.Sess
 	log.Access(source, dest, log.AccessAccepted, "")
 	log.Info("Shadowsocks|Server: Tunnelling request to ", dest)
 
-	this.udpServer.Dispatch(&proxy.SessionInfo{Source: source, Destination: dest, User: request.User}, data, func(destination v2net.Destination, payload *alloc.Buffer) {
+	this.udpServer.Dispatch(&proxy.SessionInfo{Source: source, Destination: dest, User: request.User, Inbound: this.meta}, data, func(destination v2net.Destination, payload *alloc.Buffer) {
 		defer payload.Release()
 
 		data, err := EncodeUDPPacket(request, payload)
@@ -171,10 +171,11 @@ func (this *Server) handleConnection(conn internet.Connection) {
 	log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
 	log.Info("Shadowsocks|Server: Tunnelling request to ", dest)
 
-	ray := this.packetDispatcher.DispatchToOutbound(this.meta, &proxy.SessionInfo{
+	ray := this.packetDispatcher.DispatchToOutbound(&proxy.SessionInfo{
 		Source:      v2net.DestinationFromAddr(conn.RemoteAddr()),
 		Destination: dest,
 		User:        request.User,
+		Inbound:     this.meta,
 	})
 	defer ray.InboundOutput().Release()
 

proxy/socks/server.go

@@ -285,6 +285,7 @@ func (this *Server) handleSocks4(clientAddr v2net.Destination, reader *v2io.Buff
 	session := &proxy.SessionInfo{
 		Source:      clientAddr,
 		Destination: dest,
+		Inbound:     this.meta,
 	}
 	log.Access(clientAddr, dest, log.AccessAccepted, "")
 	this.transport(reader, writer, session)
@@ -292,7 +293,7 @@ func (this *Server) handleSocks4(clientAddr v2net.Destination, reader *v2io.Buff
 }
 
 func (this *Server) transport(reader io.Reader, writer io.Writer, session *proxy.SessionInfo) {
-	ray := this.packetDispatcher.DispatchToOutbound(this.meta, session)
+	ray := this.packetDispatcher.DispatchToOutbound(session)
 	input := ray.InboundInput()
 	output := ray.InboundOutput()
 

proxy/socks/server_udp.go

@@ -10,7 +10,7 @@ import (
 )
 
 func (this *Server) listenUDP() error {
-	this.udpServer = udp.NewUDPServer(this.meta, this.packetDispatcher)
+	this.udpServer = udp.NewUDPServer(this.packetDispatcher)
 	udpHub, err := udp.ListenUDP(this.meta.Address, this.meta.Port, udp.ListenOption{Callback: this.handleUDPPayload})
 	if err != nil {
 		log.Error("Socks: Failed to listen on udp ", this.meta.Address, ":", this.meta.Port)
@@ -46,7 +46,7 @@ func (this *Server) handleUDPPayload(payload *alloc.Buffer, session *proxy.Sessi
 
 	log.Info("Socks: Send packet to ", request.Destination(), " with ", request.Data.Len(), " bytes")
 	log.Access(source, request.Destination, log.AccessAccepted, "")
-	this.udpServer.Dispatch(&proxy.SessionInfo{Source: source, Destination: request.Destination()}, request.Data, func(destination v2net.Destination, payload *alloc.Buffer) {
+	this.udpServer.Dispatch(&proxy.SessionInfo{Source: source, Destination: request.Destination(), Inbound: this.meta}, request.Data, func(destination v2net.Destination, payload *alloc.Buffer) {
 		response := &protocol.Socks5UDPRequest{
 			Fragment: 0,
 			Address:  request.Destination().Address,

proxy/testing/mocks/inboundhandler.go

@@ -31,11 +31,12 @@ func (this *InboundConnectionHandler) Close() {
 }
 
 func (this *InboundConnectionHandler) Communicate(destination v2net.Destination) error {
-	ray := this.PacketDispatcher.DispatchToOutbound(&proxy.InboundHandlerMeta{
-		AllowPassiveConnection: false,
-	}, &proxy.SessionInfo{
+	ray := this.PacketDispatcher.DispatchToOutbound(&proxy.SessionInfo{
 		Source:      v2net.TCPDestination(v2net.LocalHostIP, v2net.Port(0)),
 		Destination: destination,
+		Inbound: &proxy.InboundHandlerMeta{
+			AllowPassiveConnection: false,
+		},
 	})
 
 	input := ray.InboundInput()

proxy/vmess/inbound/inbound.go

@@ -166,10 +166,11 @@ func (this *VMessInboundHandler) HandleConnection(connection internet.Connection
 
 	connection.SetReusable(request.Option.Has(protocol.RequestOptionConnectionReuse))
 
-	ray := this.packetDispatcher.DispatchToOutbound(this.meta, &proxy.SessionInfo{
+	ray := this.packetDispatcher.DispatchToOutbound(&proxy.SessionInfo{
 		Source:      v2net.DestinationFromAddr(connection.RemoteAddr()),
 		Destination: request.Destination(),
 		User:        request.User,
+		Inbound:     this.meta,
 	})
 	input := ray.InboundInput()
 	output := ray.InboundOutput()

transport/internet/udp/udp_server.go

@@ -96,14 +96,12 @@ type UDPServer struct {
 	sync.RWMutex
 	conns            map[string]*TimedInboundRay
 	packetDispatcher dispatcher.PacketDispatcher
-	meta             *proxy.InboundHandlerMeta
 }
 
-func NewUDPServer(meta *proxy.InboundHandlerMeta, packetDispatcher dispatcher.PacketDispatcher) *UDPServer {
+func NewUDPServer(packetDispatcher dispatcher.PacketDispatcher) *UDPServer {
 	return &UDPServer{
 		conns:            make(map[string]*TimedInboundRay),
 		packetDispatcher: packetDispatcher,
-		meta:             meta,
 	}
 }
 
@@ -144,7 +142,7 @@ func (this *UDPServer) Dispatch(session *proxy.SessionInfo, payload *alloc.Buffe
 	}
 
 	log.Info("UDP Server: establishing new connection for ", destString)
-	inboundRay := this.packetDispatcher.DispatchToOutbound(this.meta, session)
+	inboundRay := this.packetDispatcher.DispatchToOutbound(session)
 	timedInboundRay := NewTimedInboundRay(destString, inboundRay, this)
 	outputStream := timedInboundRay.InboundInput()
 	if outputStream != nil {