예제 #1
0
func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, dest v2net.Destination, output chan<- *alloc.Buffer, finish *sync.Mutex) {
	defer finish.Unlock()
	defer close(output)

	reader := v2io.NewBufferedReader(conn)

	header, err := session.DecodeResponseHeader(reader)
	if err != nil {
		log.Warning("VMessOut: Failed to read response: ", err)
		return
	}
	go this.handleCommand(dest, header.Command)

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

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

	v2io.ReaderToChan(output, bodyReader)

	return
}
예제 #2
0
func (this *Server) transport(reader io.Reader, writer io.Writer, destination v2net.Destination) {
	ray := this.packetDispatcher.DispatchToOutbound(destination)
	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()
}
예제 #3
0
func (this *OutboundConnectionHandler) Dispatch(destination v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	this.Destination = destination
	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
}
예제 #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 != nil {
			log.Info("Dokodemo: Following redirect to: ", originalDest)
			dest = originalDest
		}
	}
	if dest == nil && this.address != nil && this.port > v2net.Port(0) {
		dest = v2net.TCPDestination(this.address, this.port)
	}

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

	ray := this.packetDispatcher.DispatchToOutbound(dest)
	defer ray.InboundOutput().Release()

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

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

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

		v2io.Pipe(v2reader, ray.InboundInput())
		inputFinish.Unlock()
		ray.InboundInput().Close()
	}()

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

		v2io.Pipe(ray.InboundOutput(), v2writer)
		outputFinish.Unlock()
	}()

	outputFinish.Lock()
	inputFinish.Lock()
}
예제 #5
0
func (this *VMessOutboundHandler) handleResponse(conn net.Conn, request *protocol.VMessRequest, dest v2net.Destination, output chan<- *alloc.Buffer, finish *sync.Mutex) {
	defer finish.Unlock()
	defer close(output)
	responseKey := md5.Sum(request.RequestKey[:])
	responseIV := md5.Sum(request.RequestIV[:])

	aesStream, err := v2crypto.NewAesDecryptionStream(responseKey[:], responseIV[:])
	if err != nil {
		log.Error("VMessOut: Failed to create AES encryption stream: ", err)
		return
	}
	decryptResponseReader := v2crypto.NewCryptionReader(aesStream, conn)

	buffer := alloc.NewSmallBuffer()
	defer buffer.Release()
	_, err = io.ReadFull(decryptResponseReader, buffer.Value[:4])

	if err != nil {
		log.Error("VMessOut: Failed to read VMess response (", buffer.Len(), " bytes): ", err)
		return
	}
	if !headerMatch(request, buffer.Value[0]) {
		log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
		return
	}

	if buffer.Value[2] != 0 {
		command := buffer.Value[2]
		dataLen := int(buffer.Value[3])
		_, err := io.ReadFull(decryptResponseReader, buffer.Value[:dataLen])
		if err != nil {
			log.Error("VMessOut: Failed to read response command: ", err)
			return
		}
		data := buffer.Value[:dataLen]
		go this.handleCommand(dest, command, data)
	}

	var reader v2io.Reader
	if request.IsChunkStream() {
		reader = vmessio.NewAuthChunkReader(decryptResponseReader)
	} else {
		reader = v2io.NewAdaptiveReader(decryptResponseReader)
	}

	v2io.ReaderToChan(output, reader)

	return
}
예제 #6
0
func handleInput(request *protocol.VMessRequest, reader io.Reader, input chan<- *alloc.Buffer, finish *sync.Mutex) {
	defer close(input)
	defer finish.Unlock()

	aesStream, err := v2crypto.NewAesDecryptionStream(request.RequestKey, request.RequestIV)
	if err != nil {
		log.Error("VMessIn: Failed to create AES decryption stream: ", err)
		return
	}
	descriptionReader := v2crypto.NewCryptionReader(aesStream, reader)
	var requestReader v2io.Reader
	if request.IsChunkStream() {
		requestReader = vmessio.NewAuthChunkReader(descriptionReader)
	} else {
		requestReader = v2io.NewAdaptiveReader(descriptionReader)
	}
	v2io.ReaderToChan(input, requestReader)
}
예제 #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()
	}()
}
예제 #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
}
예제 #9
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(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()
}
예제 #10
0
func (this *Shadowsocks) handleConnection(conn *hub.TCPConn) {
	defer conn.Close()

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

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

	iv := buffer.Value[:this.config.Cipher.IVSize()]
	key := this.config.Key

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

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

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

	packet := v2net.NewPacket(dest, nil, true)
	ray := this.packetDispatcher.DispatchToOutbound(packet)

	var writeFinish sync.Mutex
	writeFinish.Lock()
	go func() {
		if payload, ok := <-ray.InboundOutput(); ok {
			payload.SliceBack(16)
			rand.Read(payload.Value[:16])

			writer, err := this.config.Cipher.NewEncodingStream(key, payload.Value[:16], conn)
			if err != nil {
				log.Error("Shadowsocks: Failed to create encoding stream: ", err)
				return
			}

			writer.Write(payload.Value)
			payload.Release()
			v2io.ChanToRawWriter(writer, ray.InboundOutput())
		}
		writeFinish.Unlock()
	}()

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

	v2io.ReaderToChan(ray.InboundInput(), payloadReader)
	close(ray.InboundInput())

	writeFinish.Lock()
}
예제 #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 := raw.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(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.NewSmallBuffer().Clear()); err != nil {
			connection.SetReusable(false)
		}
	}
	v2writer.Release()

	readFinish.Lock()
}
예제 #12
0
func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
	defer connection.Close()

	connReader := v2net.NewTimeOutReader(16, connection)

	reader := v2io.NewBufferedReader(connReader)
	session := raw.NewServerSession(this.clients)

	request, err := session.DecodeRequestHeader(reader)
	if err != nil {
		log.Access(connection.RemoteAddr(), serial.StringLiteral(""), log.AccessRejected, serial.StringLiteral(err.Error()))
		log.Warning("VMessIn: Invalid request from ", connection.RemoteAddr(), ": ", err)
		return
	}
	log.Access(connection.RemoteAddr(), request.Destination(), log.AccessAccepted, serial.StringLiteral(""))
	log.Debug("VMessIn: Received request for ", request.Destination())

	ray := this.packetDispatcher.DispatchToOutbound(v2net.NewPacket(request.Destination(), nil, true))
	input := ray.InboundInput()
	output := ray.InboundOutput()
	var readFinish, writeFinish sync.Mutex
	readFinish.Lock()
	writeFinish.Lock()

	userSettings := proto.GetUserSettings(request.User.Level)
	connReader.SetTimeOut(userSettings.PayloadReadTimeout)
	reader.SetCached(false)
	go func() {
		defer close(input)
		defer readFinish.Unlock()
		bodyReader := session.DecodeRequestBody(reader)
		var requestReader v2io.Reader
		if request.Option.IsChunkStream() {
			requestReader = vmessio.NewAuthChunkReader(bodyReader)
		} else {
			requestReader = v2io.NewAdaptiveReader(bodyReader)
		}
		v2io.ReaderToChan(input, requestReader)
	}()

	writer := v2io.NewBufferedWriter(connection)

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

	session.EncodeResponseHeader(response, writer)

	bodyWriter := session.EncodeResponseBody(writer)

	// Optimize for small response packet
	if data, open := <-output; open {
		if request.Option.IsChunkStream() {
			vmessio.Authenticate(data)
		}
		bodyWriter.Write(data.Value)
		data.Release()

		writer.SetCached(false)
		go func(finish *sync.Mutex) {
			var writer v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
			if request.Option.IsChunkStream() {
				writer = vmessio.NewAuthChunkWriter(writer)
			}
			v2io.ChanToWriter(writer, output)
			finish.Unlock()
		}(&writeFinish)
		writeFinish.Lock()
	}

	connection.CloseWrite()
	readFinish.Lock()
}
예제 #13
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 == DomainStrategyUseIP && destination.Address().IsDomain() {
		destination = this.ResolveIP(destination)
	}
	err := retry.Timed(5, 100).On(func() error {
		rawConn, err := internet.Dial(this.meta.Address, destination, this.meta.StreamSettings)
		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()
	var readMutex, writeMutex sync.Mutex
	readMutex.Lock()
	writeMutex.Lock()

	conn.Write(payload.Value)

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

		v2io.Pipe(input, v2writer)
		writeMutex.Unlock()
	}()

	go func() {
		defer readMutex.Unlock()

		var reader io.Reader = conn

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

		v2reader := v2io.NewAdaptiveReader(reader)
		defer v2reader.Release()

		v2io.Pipe(v2reader, output)
		ray.OutboundOutput().Close()
	}()

	writeMutex.Lock()
	if tcpConn, ok := conn.(*tcp.RawConnection); ok {
		tcpConn.CloseWrite()
	}
	readMutex.Lock()

	return nil
}