Exemplo n.º 1
0
func (this *Server) transport(reader io.Reader, writer io.Writer, session *proxy.SessionInfo) {
	ray := this.packetDispatcher.DispatchToOutbound(this.meta, session)
	input := ray.InboundInput()
	output := ray.InboundOutput()

	var inputFinish, outputFinish sync.Mutex
	inputFinish.Lock()
	outputFinish.Lock()

	go func() {
		v2reader := v2io.NewAdaptiveReader(reader)
		defer v2reader.Release()

		v2io.Pipe(v2reader, input)
		inputFinish.Unlock()
		input.Close()
	}()

	go func() {
		v2writer := v2io.NewAdaptiveWriter(writer)
		defer v2writer.Release()

		v2io.Pipe(output, v2writer)
		outputFinish.Unlock()
		output.Release()
	}()
	outputFinish.Lock()
}
Exemplo n.º 2
0
func (this *OutboundConnectionHandler) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	this.Destination = destination
	if !payload.IsEmpty() {
		this.ConnOutput.Write(payload.Value)
	}
	payload.Release()

	writeFinish := &sync.Mutex{}

	writeFinish.Lock()

	go func() {
		v2writer := v2io.NewAdaptiveWriter(this.ConnOutput)
		defer v2writer.Release()

		v2io.Pipe(input, v2writer)
		writeFinish.Unlock()
		input.Release()
	}()

	writeFinish.Lock()

	v2reader := v2io.NewAdaptiveReader(this.ConnInput)
	defer v2reader.Release()

	v2io.Pipe(v2reader, output)
	output.Close()

	return nil
}
Exemplo n.º 3
0
func (this *FreedomConnection) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
	log.Info("Freedom: Opening connection to ", destination)

	defer payload.Release()
	defer ray.OutboundInput().Release()
	defer ray.OutboundOutput().Close()

	var conn internet.Connection
	if this.domainStrategy == Config_USE_IP && destination.Address.Family().IsDomain() {
		destination = this.ResolveIP(destination)
	}
	err := retry.ExponentialBackoff(5, 100).On(func() error {
		rawConn, err := internet.Dial(this.meta.Address, destination, this.meta.GetDialerOptions())
		if err != nil {
			return err
		}
		conn = rawConn
		return nil
	})
	if err != nil {
		log.Warning("Freedom: Failed to open connection to ", destination, ": ", err)
		return err
	}
	defer conn.Close()

	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	if !payload.IsEmpty() {
		conn.Write(payload.Value)
	}

	go func() {
		v2writer := v2io.NewAdaptiveWriter(conn)
		defer v2writer.Release()

		v2io.Pipe(input, v2writer)
		if tcpConn, ok := conn.(*tcp.RawConnection); ok {
			tcpConn.CloseWrite()
		}
	}()

	var reader io.Reader = conn

	timeout := this.timeout
	if destination.Network == v2net.Network_UDP {
		timeout = 16
	}
	if timeout > 0 {
		reader = v2net.NewTimeOutReader(timeout /* seconds */, conn)
	}

	v2reader := v2io.NewAdaptiveReader(reader)
	v2io.Pipe(v2reader, output)
	v2reader.Release()
	ray.OutboundOutput().Close()

	return nil
}
Exemplo n.º 4
0
func (this *DokodemoDoor) HandleTCPConnection(conn internet.Connection) {
	defer conn.Close()

	var dest v2net.Destination
	if this.config.FollowRedirect {
		originalDest := GetOriginalDestination(conn)
		if originalDest.Network != v2net.Network_Unknown {
			log.Info("Dokodemo: Following redirect to: ", originalDest)
			dest = originalDest
		}
	}
	if dest.Network == v2net.Network_Unknown && this.address != nil && this.port > v2net.Port(0) {
		dest = v2net.TCPDestination(this.address, this.port)
	}

	if dest.Network == v2net.Network_Unknown {
		log.Info("Dokodemo: Unknown destination, stop forwarding...")
		return
	}
	log.Info("Dokodemo: Handling request to ", dest)

	ray := this.packetDispatcher.DispatchToOutbound(&proxy.SessionInfo{
		Source:      v2net.DestinationFromAddr(conn.RemoteAddr()),
		Destination: dest,
		Inbound:     this.meta,
	})
	defer ray.InboundOutput().Release()

	var wg sync.WaitGroup

	reader := v2net.NewTimeOutReader(this.config.Timeout, conn)
	defer reader.Release()

	wg.Add(1)
	go func() {
		v2reader := v2io.NewAdaptiveReader(reader)
		defer v2reader.Release()

		v2io.Pipe(v2reader, ray.InboundInput())
		wg.Done()
		ray.InboundInput().Close()
	}()

	wg.Add(1)
	go func() {
		v2writer := v2io.NewAdaptiveWriter(conn)
		defer v2writer.Release()

		v2io.Pipe(ray.InboundOutput(), v2writer)
		wg.Done()
	}()

	wg.Wait()
}
Exemplo n.º 5
0
func (this *VMessOutboundHandler) handleRequest(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, payload *alloc.Buffer, input v2io.Reader, finish *sync.Mutex) {
	defer finish.Unlock()

	writer := v2io.NewBufferedWriter(conn)
	defer writer.Release()
	session.EncodeRequestHeader(request, writer)

	bodyWriter := session.EncodeRequestBody(writer)
	var streamWriter v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
	if request.Option.Has(protocol.RequestOptionChunkStream) {
		streamWriter = vmessio.NewAuthChunkWriter(streamWriter)
	}
	if !payload.IsEmpty() {
		if err := streamWriter.Write(payload); err != nil {
			conn.SetReusable(false)
		}
	}
	writer.SetCached(false)

	err := v2io.Pipe(input, streamWriter)
	if err != io.EOF {
		conn.SetReusable(false)
	}

	if request.Option.Has(protocol.RequestOptionChunkStream) {
		err := streamWriter.Write(alloc.NewLocalBuffer(32).Clear())
		if err != nil {
			conn.SetReusable(false)
		}
	}
	streamWriter.Release()
	return
}
Exemplo n.º 6
0
func (this *InboundConnectionHandler) Communicate(destination v2net.Destination) error {
	ray := this.PacketDispatcher.DispatchToOutbound(&proxy.SessionInfo{
		Source:      v2net.TCPDestination(v2net.LocalHostIP, v2net.Port(0)),
		Destination: destination,
		Inbound: &proxy.InboundHandlerMeta{
			AllowPassiveConnection: false,
		},
	})

	input := ray.InboundInput()
	output := ray.InboundOutput()

	readFinish := &sync.Mutex{}
	writeFinish := &sync.Mutex{}

	readFinish.Lock()
	writeFinish.Lock()

	go func() {
		v2reader := v2io.NewAdaptiveReader(this.ConnInput)
		defer v2reader.Release()

		v2io.Pipe(v2reader, input)
		input.Close()
		readFinish.Unlock()
	}()

	go func() {
		v2writer := v2io.NewAdaptiveWriter(this.ConnOutput)
		defer v2writer.Release()

		v2io.Pipe(output, v2writer)
		output.Release()
		writeFinish.Unlock()
	}()

	readFinish.Lock()
	writeFinish.Lock()
	return nil
}
Exemplo n.º 7
0
func (this *Server) transport(input io.Reader, output io.Writer, ray ray.InboundRay) {
	var wg sync.WaitGroup
	wg.Add(2)
	defer wg.Wait()

	go func() {
		v2reader := v2io.NewAdaptiveReader(input)
		defer v2reader.Release()

		v2io.Pipe(v2reader, ray.InboundInput())
		ray.InboundInput().Close()
		wg.Done()
	}()

	go func() {
		v2writer := v2io.NewAdaptiveWriter(output)
		defer v2writer.Release()

		v2io.Pipe(ray.InboundOutput(), v2writer)
		ray.InboundOutput().Release()
		wg.Done()
	}()
}
Exemplo n.º 8
0
func (this *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output v2io.Writer, finish *sync.Mutex) {
	defer finish.Unlock()

	reader := v2io.NewBufferedReader(conn)
	defer reader.Release()

	header, err := session.DecodeResponseHeader(reader)
	if err != nil {
		conn.SetReusable(false)
		log.Warning("VMess|Outbound: Failed to read response from ", request.Destination(), ": ", err)
		return
	}
	go this.handleCommand(dest, header.Command)

	if !header.Option.Has(protocol.ResponseOptionConnectionReuse) {
		conn.SetReusable(false)
	}

	reader.SetCached(false)
	decryptReader := session.DecodeResponseBody(reader)

	var bodyReader v2io.Reader
	if request.Option.Has(protocol.RequestOptionChunkStream) {
		bodyReader = vmessio.NewAuthChunkReader(decryptReader)
	} else {
		bodyReader = v2io.NewAdaptiveReader(decryptReader)
	}

	err = v2io.Pipe(bodyReader, output)
	if err != io.EOF {
		conn.SetReusable(false)
	}

	bodyReader.Release()

	return
}
Exemplo n.º 9
0
func (this *Client) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
	defer payload.Release()
	defer ray.OutboundInput().Release()
	defer ray.OutboundOutput().Close()

	network := destination.Network

	var server *protocol.ServerSpec
	var conn internet.Connection

	err := retry.ExponentialBackoff(5, 100).On(func() error {
		server = this.serverPicker.PickServer()
		dest := server.Destination()
		dest.Network = network
		rawConn, err := internet.Dial(this.meta.Address, dest, this.meta.GetDialerOptions())
		if err != nil {
			return err
		}
		conn = rawConn

		return nil
	})
	if err != nil {
		return errors.New("Shadowsocks|Client: Failed to find an available destination:" + err.Error())
	}
	log.Info("Shadowsocks|Client: Tunneling request to ", destination, " via ", server.Destination())

	conn.SetReusable(false)

	request := &protocol.RequestHeader{
		Version: Version,
		Address: destination.Address,
		Port:    destination.Port,
	}
	if destination.Network == v2net.Network_TCP {
		request.Command = protocol.RequestCommandTCP
	} else {
		request.Command = protocol.RequestCommandUDP
	}

	user := server.PickUser()
	rawAccount, err := user.GetTypedAccount()
	if err != nil {
		return errors.New("Shadowsocks|Client: Failed to get a valid user account: " + err.Error())
	}
	account := rawAccount.(*ShadowsocksAccount)
	request.User = user

	if account.OneTimeAuth == Account_Auto || account.OneTimeAuth == Account_Enabled {
		request.Option |= RequestOptionOneTimeAuth
	}

	if request.Command == protocol.RequestCommandTCP {
		bufferedWriter := v2io.NewBufferedWriter(conn)
		defer bufferedWriter.Release()

		bodyWriter, err := WriteTCPRequest(request, bufferedWriter)
		defer bodyWriter.Release()

		if err != nil {
			return errors.New("Shadowsock|Client: Failed to write request: " + err.Error())
		}

		if err := bodyWriter.Write(payload); err != nil {
			return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
		}

		var responseMutex sync.Mutex
		responseMutex.Lock()

		go func() {
			defer responseMutex.Unlock()

			responseReader, err := ReadTCPResponse(user, conn)
			if err != nil {
				log.Warning("Shadowsocks|Client: Failed to read response: " + err.Error())
				return
			}

			v2io.Pipe(responseReader, ray.OutboundOutput())
		}()

		bufferedWriter.SetCached(false)
		v2io.Pipe(ray.OutboundInput(), bodyWriter)

		responseMutex.Lock()
	}

	if request.Command == protocol.RequestCommandUDP {
		timedReader := v2net.NewTimeOutReader(16, conn)
		var responseMutex sync.Mutex
		responseMutex.Lock()

		go func() {
			defer responseMutex.Unlock()

			reader := &UDPReader{
				Reader: timedReader,
				User:   user,
			}

			v2io.Pipe(reader, ray.OutboundOutput())
		}()

		writer := &UDPWriter{
			Writer:  conn,
			Request: request,
		}
		if !payload.IsEmpty() {
			if err := writer.Write(payload); err != nil {
				return errors.New("Shadowsocks|Client: Failed to write payload: " + err.Error())
			}
		}
		v2io.Pipe(ray.OutboundInput(), writer)

		responseMutex.Lock()
	}

	return nil
}
Exemplo n.º 10
0
func (this *Server) handleConnection(conn internet.Connection) {
	defer conn.Close()
	conn.SetReusable(false)

	timedReader := v2net.NewTimeOutReader(16, conn)
	defer timedReader.Release()

	bufferedReader := v2io.NewBufferedReader(timedReader)
	defer bufferedReader.Release()

	request, bodyReader, err := ReadTCPSession(this.user, bufferedReader)
	if err != nil {
		log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
		log.Info("Shadowsocks|Server: Failed to create request from: ", conn.RemoteAddr(), ": ", err)
		return
	}
	defer bodyReader.Release()

	bufferedReader.SetCached(false)

	userSettings := this.user.GetSettings()
	timedReader.SetTimeOut(userSettings.PayloadReadTimeout)

	dest := request.Destination()
	log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
	log.Info("Shadowsocks|Server: Tunnelling request to ", dest)

	ray := this.packetDispatcher.DispatchToOutbound(&proxy.SessionInfo{
		Source:      v2net.DestinationFromAddr(conn.RemoteAddr()),
		Destination: dest,
		User:        request.User,
		Inbound:     this.meta,
	})
	defer ray.InboundOutput().Release()

	var writeFinish sync.Mutex
	writeFinish.Lock()
	go func() {
		defer writeFinish.Unlock()

		bufferedWriter := v2io.NewBufferedWriter(conn)
		defer bufferedWriter.Release()

		responseWriter, err := WriteTCPResponse(request, bufferedWriter)
		if err != nil {
			log.Warning("Shadowsocks|Server: Failed to write response: ", err)
			return
		}
		defer responseWriter.Release()

		if payload, err := ray.InboundOutput().Read(); err == nil {
			responseWriter.Write(payload)
			bufferedWriter.SetCached(false)

			v2io.Pipe(ray.InboundOutput(), responseWriter)
		}
	}()

	v2io.Pipe(bodyReader, ray.InboundInput())
	ray.InboundInput().Close()

	writeFinish.Lock()
}
Exemplo n.º 11
0
func (this *VMessInboundHandler) HandleConnection(connection internet.Connection) {
	defer connection.Close()

	if !this.accepting {
		return
	}

	connReader := v2net.NewTimeOutReader(8, connection)
	defer connReader.Release()

	reader := v2io.NewBufferedReader(connReader)
	defer reader.Release()

	this.RLock()
	if !this.accepting {
		this.RUnlock()
		return
	}
	session := encoding.NewServerSession(this.clients)
	defer session.Release()

	request, err := session.DecodeRequestHeader(reader)
	this.RUnlock()

	if err != nil {
		if err != io.EOF {
			log.Access(connection.RemoteAddr(), "", log.AccessRejected, err)
			log.Warning("VMessIn: Invalid request from ", connection.RemoteAddr(), ": ", err)
		}
		connection.SetReusable(false)
		return
	}
	log.Access(connection.RemoteAddr(), request.Destination(), log.AccessAccepted, "")
	log.Info("VMessIn: Received request for ", request.Destination())

	connection.SetReusable(request.Option.Has(protocol.RequestOptionConnectionReuse))

	ray := this.packetDispatcher.DispatchToOutbound(this.meta, &proxy.SessionInfo{
		Source:      v2net.DestinationFromAddr(connection.RemoteAddr()),
		Destination: request.Destination(),
	})
	input := ray.InboundInput()
	output := ray.InboundOutput()
	defer input.Close()
	defer output.Release()

	var readFinish sync.Mutex
	readFinish.Lock()

	userSettings := protocol.GetUserSettings(request.User.Level)
	connReader.SetTimeOut(userSettings.PayloadReadTimeout)
	reader.SetCached(false)

	go func() {
		bodyReader := session.DecodeRequestBody(reader)
		var requestReader v2io.Reader
		if request.Option.Has(protocol.RequestOptionChunkStream) {
			requestReader = vmessio.NewAuthChunkReader(bodyReader)
		} else {
			requestReader = v2io.NewAdaptiveReader(bodyReader)
		}
		err := v2io.Pipe(requestReader, input)
		if err != io.EOF {
			connection.SetReusable(false)
		}

		requestReader.Release()
		input.Close()
		readFinish.Unlock()
	}()

	writer := v2io.NewBufferedWriter(connection)
	defer writer.Release()

	response := &protocol.ResponseHeader{
		Command: this.generateCommand(request),
	}

	if connection.Reusable() {
		response.Option.Set(protocol.ResponseOptionConnectionReuse)
	}

	session.EncodeResponseHeader(response, writer)

	bodyWriter := session.EncodeResponseBody(writer)
	var v2writer v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
	if request.Option.Has(protocol.RequestOptionChunkStream) {
		v2writer = vmessio.NewAuthChunkWriter(v2writer)
	}

	// Optimize for small response packet
	if data, err := output.Read(); err == nil {
		if err := v2writer.Write(data); err != nil {
			connection.SetReusable(false)
		}

		writer.SetCached(false)

		err = v2io.Pipe(output, v2writer)
		if err != io.EOF {
			connection.SetReusable(false)
		}

	}
	output.Release()
	if request.Option.Has(protocol.RequestOptionChunkStream) {
		if err := v2writer.Write(alloc.NewLocalBuffer(32).Clear()); err != nil {
			connection.SetReusable(false)
		}
	}
	writer.Flush()
	v2writer.Release()

	readFinish.Lock()
}
Exemplo n.º 12
0
func (this *Server) handleConnection(conn internet.Connection) {
	defer conn.Close()

	buffer := alloc.NewSmallBuffer()
	defer buffer.Release()

	timedReader := v2net.NewTimeOutReader(16, conn)
	defer timedReader.Release()

	bufferedReader := v2io.NewBufferedReader(timedReader)
	defer bufferedReader.Release()

	ivLen := this.config.Cipher.IVSize()
	_, err := io.ReadFull(bufferedReader, buffer.Value[:ivLen])
	if err != nil {
		if err != io.EOF {
			log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
			log.Warning("Shadowsocks: Failed to read IV: ", err)
		}
		return
	}

	iv := buffer.Value[:ivLen]
	key := this.config.Key

	stream, err := this.config.Cipher.NewDecodingStream(key, iv)
	if err != nil {
		log.Error("Shadowsocks: Failed to create decoding stream: ", err)
		return
	}

	reader := crypto.NewCryptionReader(stream, bufferedReader)

	request, err := ReadRequest(reader, NewAuthenticator(HeaderKeyGenerator(key, iv)), false)
	if err != nil {
		log.Access(conn.RemoteAddr(), "", log.AccessRejected, err)
		log.Warning("Shadowsocks: Invalid request from ", conn.RemoteAddr(), ": ", err)
		return
	}
	defer request.Release()
	bufferedReader.SetCached(false)

	userSettings := protocol.GetUserSettings(this.config.Level)
	timedReader.SetTimeOut(userSettings.PayloadReadTimeout)

	dest := v2net.TCPDestination(request.Address, request.Port)
	log.Access(conn.RemoteAddr(), dest, log.AccessAccepted, "")
	log.Info("Shadowsocks: Tunnelling request to ", dest)

	ray := this.packetDispatcher.DispatchToOutbound(this.meta, &proxy.SessionInfo{
		Source:      v2net.DestinationFromAddr(conn.RemoteAddr()),
		Destination: dest,
	})
	defer ray.InboundOutput().Release()

	var writeFinish sync.Mutex
	writeFinish.Lock()
	go func() {
		if payload, err := ray.InboundOutput().Read(); err == nil {
			payload.SliceBack(ivLen)
			rand.Read(payload.Value[:ivLen])

			stream, err := this.config.Cipher.NewEncodingStream(key, payload.Value[:ivLen])
			if err != nil {
				log.Error("Shadowsocks: Failed to create encoding stream: ", err)
				return
			}
			stream.XORKeyStream(payload.Value[ivLen:], payload.Value[ivLen:])

			conn.Write(payload.Value)
			payload.Release()

			writer := crypto.NewCryptionWriter(stream, conn)
			v2writer := v2io.NewAdaptiveWriter(writer)

			v2io.Pipe(ray.InboundOutput(), v2writer)
			writer.Release()
			v2writer.Release()
		}
		writeFinish.Unlock()
	}()

	var payloadReader v2io.Reader
	if request.OTA {
		payloadAuth := NewAuthenticator(ChunkKeyGenerator(iv))
		payloadReader = NewChunkReader(reader, payloadAuth)
	} else {
		payloadReader = v2io.NewAdaptiveReader(reader)
	}

	v2io.Pipe(payloadReader, ray.InboundInput())
	ray.InboundInput().Close()
	payloadReader.Release()

	writeFinish.Lock()
}