Golang Connection.SetReusable方法代码示例

func (s *Server) Process(ctx context.Context, network v2net.Network, conn internet.Connection) error {
	conn.SetReusable(false)

	timedReader := v2net.NewTimeOutReader(s.config.Timeout, conn)
	reader := bufio.OriginalReaderSize(timedReader, 2048)

	request, err := http.ReadRequest(reader)
	if err != nil {
		if errors.Cause(err) != io.EOF {
			log.Warning("HTTP: Failed to read http request: ", err)
		}
		return err
	}
	log.Info("HTTP: Request to Method [", request.Method, "] Host [", request.Host, "] with URL [", request.URL, "]")
	defaultPort := v2net.Port(80)
	if strings.ToLower(request.URL.Scheme) == "https" {
		defaultPort = v2net.Port(443)
	}
	host := request.Host
	if len(host) == 0 {
		host = request.URL.Host
	}
	dest, err := parseHost(host, defaultPort)
	if err != nil {
		log.Warning("HTTP: Malformed proxy host (", host, "): ", err)
		return err
	}
	log.Access(conn.RemoteAddr(), request.URL, log.AccessAccepted, "")
	ctx = proxy.ContextWithDestination(ctx, dest)
	if strings.ToUpper(request.Method) == "CONNECT" {
		return s.handleConnect(ctx, request, reader, conn)
	} else {
		return s.handlePlainHTTP(ctx, request, reader, conn)
	}
}

func (this *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *alloc.Buffer, ray ray.OutboundRay) error {
	defer ray.OutboundInput().Release()
	defer ray.OutboundOutput().Close()

	var rec *protocol.ServerSpec
	var conn internet.Connection

	err := retry.Timed(5, 100).On(func() error {
		rec = this.serverPicker.PickServer()
		rawConn, err := internet.Dial(this.meta.Address, rec.Destination(), this.meta.StreamSettings)
		if err != nil {
			return err
		}
		conn = rawConn

		return nil
	})
	if err != nil {
		log.Error("VMess|Outbound: Failed to find an available destination:", err)
		return err
	}
	log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())

	command := protocol.RequestCommandTCP
	if target.IsUDP() {
		command = protocol.RequestCommandUDP
	}
	request := &protocol.RequestHeader{
		Version: encoding.Version,
		User:    rec.PickUser(),
		Command: command,
		Address: target.Address(),
		Port:    target.Port(),
		Option:  protocol.RequestOptionChunkStream,
	}

	defer conn.Close()

	conn.SetReusable(true)
	if conn.Reusable() { // Conn reuse may be disabled on transportation layer
		request.Option.Set(protocol.RequestOptionConnectionReuse)
	}

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

	var requestFinish, responseFinish sync.Mutex
	requestFinish.Lock()
	responseFinish.Lock()

	session := encoding.NewClientSession(protocol.DefaultIDHash)

	go this.handleRequest(session, conn, request, payload, input, &requestFinish)
	go this.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)

	requestFinish.Lock()
	responseFinish.Lock()
	return nil
}

func (d *DokodemoDoor) Process(ctx context.Context, network net.Network, conn internet.Connection) error {
	log.Debug("Dokodemo: processing connection from: ", conn.RemoteAddr())
	conn.SetReusable(false)
	ctx = proxy.ContextWithDestination(ctx, net.Destination{
		Network: network,
		Address: d.address,
		Port:    d.port,
	})
	inboundRay := d.packetDispatcher.DispatchToOutbound(ctx)

	requestDone := signal.ExecuteAsync(func() error {
		defer inboundRay.InboundInput().Close()

		timedReader := net.NewTimeOutReader(d.config.Timeout, conn)
		chunkReader := buf.NewReader(timedReader)

		if err := buf.PipeUntilEOF(chunkReader, inboundRay.InboundInput()); err != nil {
			log.Info("Dokodemo: Failed to transport request: ", err)
			return err
		}

		return nil
	})

	responseDone := signal.ExecuteAsync(func() error {
		v2writer := buf.NewWriter(conn)

		if err := buf.PipeUntilEOF(inboundRay.InboundOutput(), v2writer); err != nil {
			log.Info("Dokodemo: Failed to transport response: ", err)
			return err
		}
		return nil
	})

	if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
		inboundRay.InboundInput().CloseError()
		inboundRay.InboundOutput().CloseError()
		log.Info("Dokodemo: Connection ends with ", err)
		return err
	}

	return nil
}

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
}

func (v *VMessOutboundHandler) handleRequest(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, payload *buf.Buffer, input buf.Reader, finish *sync.Mutex) {
	defer finish.Unlock()

	writer := bufio.NewWriter(conn)
	defer writer.Release()
	session.EncodeRequestHeader(request, writer)

	bodyWriter := session.EncodeRequestBody(request, writer)
	defer bodyWriter.Release()

	if !payload.IsEmpty() {
		if err := bodyWriter.Write(payload); err != nil {
			log.Info("VMess|Outbound: Failed to write payload. Disabling connection reuse.", err)
			conn.SetReusable(false)
		}
		payload.Release()
	}
	writer.SetCached(false)

	if err := buf.PipeUntilEOF(input, bodyWriter); err != nil {
		conn.SetReusable(false)
	}

	if request.Option.Has(protocol.RequestOptionChunkStream) {
		err := bodyWriter.Write(buf.NewLocal(8))
		if err != nil {
			conn.SetReusable(false)
		}
	}
	return
}

func (v *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output buf.Writer, finish *sync.Mutex) {
	defer finish.Unlock()

	reader := bufio.NewReader(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
	}
	v.handleCommand(dest, header.Command)

	conn.SetReusable(header.Option.Has(protocol.ResponseOptionConnectionReuse))

	reader.SetCached(false)
	bodyReader := session.DecodeResponseBody(request, reader)
	defer bodyReader.Release()

	if err := buf.PipeUntilEOF(bodyReader, output); err != nil {
		conn.SetReusable(false)
	}

	return
}

func (s *Server) processTCP(ctx context.Context, conn internet.Connection) error {
	conn.SetReusable(false)

	timedReader := net.NewTimeOutReader(16 /* seconds, for handshake */, conn)
	reader := bufio.NewReader(timedReader)

	inboundDest := proxy.InboundDestinationFromContext(ctx)
	session := &ServerSession{
		config: s.config,
		port:   inboundDest.Port,
	}

	source := proxy.SourceFromContext(ctx)
	request, err := session.Handshake(reader, conn)
	if err != nil {
		log.Access(source, "", log.AccessRejected, err)
		log.Info("Socks|Server: Failed to read request: ", err)
		return err
	}

	if request.Command == protocol.RequestCommandTCP {
		dest := request.Destination()
		log.Info("Socks|Server: TCP Connect request to ", dest)
		log.Access(source, dest, log.AccessAccepted, "")

		timedReader.SetTimeOut(s.config.Timeout)
		ctx = proxy.ContextWithDestination(ctx, dest)
		return s.transport(ctx, reader, conn)
	}

	if request.Command == protocol.RequestCommandUDP {
		return s.handleUDP()
	}

	return nil
}

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
}

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,
			}
//.........这里部分代码省略.........

func (v *VMessInboundHandler) Process(ctx context.Context, network net.Network, connection internet.Connection) error {
	connReader := net.NewTimeOutReader(8, connection)
	reader := bufio.NewReader(connReader)

	session := encoding.NewServerSession(v.clients)
	request, err := session.DecodeRequestHeader(reader)

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

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

	ctx = proxy.ContextWithDestination(ctx, request.Destination())
	ctx = protocol.ContextWithUser(ctx, request.User)
	ray := v.packetDispatcher.DispatchToOutbound(ctx)

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

	userSettings := request.User.GetSettings()
	connReader.SetTimeOut(userSettings.PayloadReadTimeout)
	reader.SetBuffered(false)

	requestDone := signal.ExecuteAsync(func() error {
		return transferRequest(session, request, reader, input)
	})

	writer := bufio.NewWriter(connection)
	response := &protocol.ResponseHeader{
		Command: v.generateCommand(ctx, request),
	}

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

	responseDone := signal.ExecuteAsync(func() error {
		return transferResponse(session, request, response, output, writer)
	})

	if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
		log.Info("VMess|Inbound: Connection ending with ", err)
		connection.SetReusable(false)
		input.CloseError()
		output.CloseError()
		return err
	}

	if err := writer.Flush(); err != nil {
		log.Info("VMess|Inbound: Failed to flush remain data: ", err)
		connection.SetReusable(false)
		return err
	}

	return nil
}

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()
}

func (s *Server) handleConnection(ctx context.Context, conn internet.Connection) error {
	conn.SetReusable(false)

	timedReader := net.NewTimeOutReader(16, conn)
	bufferedReader := bufio.NewReader(timedReader)
	request, bodyReader, err := ReadTCPSession(s.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 err
	}

	bufferedReader.SetBuffered(false)

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

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

	ctx = proxy.ContextWithDestination(ctx, dest)
	ctx = protocol.ContextWithUser(ctx, request.User)
	ray := s.packetDispatcher.DispatchToOutbound(ctx)

	requestDone := signal.ExecuteAsync(func() error {
		bufferedWriter := bufio.NewWriter(conn)
		responseWriter, err := WriteTCPResponse(request, bufferedWriter)
		if err != nil {
			log.Warning("Shadowsocks|Server: Failed to write response: ", err)
			return err
		}

		payload, err := ray.InboundOutput().Read()
		if err != nil {
			return err
		}
		if err := responseWriter.Write(payload); err != nil {
			return err
		}
		payload.Release()

		if err := bufferedWriter.SetBuffered(false); err != nil {
			return err
		}

		if err := buf.PipeUntilEOF(ray.InboundOutput(), responseWriter); err != nil {
			log.Info("Shadowsocks|Server: Failed to transport all TCP response: ", err)
			return err
		}

		return nil
	})

	responseDone := signal.ExecuteAsync(func() error {
		defer ray.InboundInput().Close()

		if err := buf.PipeUntilEOF(bodyReader, ray.InboundInput()); err != nil {
			log.Info("Shadowsocks|Server: Failed to transport all TCP request: ", err)
			return err
		}
		return nil
	})

	if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
		log.Info("Shadowsocks|Server: Connection ends with ", err)
		ray.InboundInput().CloseError()
		ray.InboundOutput().CloseError()
		return err
	}

	return nil
}

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 {
//.........这里部分代码省略.........

// Process implements OutboundHandler.Process().
func (v *Client) Process(ctx context.Context, outboundRay ray.OutboundRay) error {
	destination := proxy.DestinationFromContext(ctx)
	network := destination.Network

	var server *protocol.ServerSpec
	var conn internet.Connection

	dialer := proxy.DialerFromContext(ctx)
	err := retry.ExponentialBackoff(5, 100).On(func() error {
		server = v.serverPicker.PickServer()
		dest := server.Destination()
		dest.Network = network
		rawConn, err := dialer.Dial(ctx, dest)
		if err != nil {
			return err
		}
		conn = rawConn

		return nil
	})
	if err != nil {
		log.Warning("Shadowsocks|Client: Failed to find an available destination:", err)
		return err
	}
	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 == net.Network_TCP {
		request.Command = protocol.RequestCommandTCP
	} else {
		request.Command = protocol.RequestCommandUDP
	}

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

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

	if request.Command == protocol.RequestCommandTCP {
		bufferedWriter := bufio.NewWriter(conn)
		bodyWriter, err := WriteTCPRequest(request, bufferedWriter)
		if err != nil {
			log.Info("Shadowsocks|Client: Failed to write request: ", err)
			return err
		}

		bufferedWriter.SetBuffered(false)

		requestDone := signal.ExecuteAsync(func() error {
			if err := buf.PipeUntilEOF(outboundRay.OutboundInput(), bodyWriter); err != nil {
				return err
			}
			return nil
		})

		responseDone := signal.ExecuteAsync(func() error {
			defer outboundRay.OutboundOutput().Close()

			responseReader, err := ReadTCPResponse(user, conn)
			if err != nil {
				return err
			}

			if err := buf.PipeUntilEOF(responseReader, outboundRay.OutboundOutput()); err != nil {
				return err
			}

			return nil
		})

		if err := signal.ErrorOrFinish2(requestDone, responseDone); err != nil {
			log.Info("Shadowsocks|Client: Connection ends with ", err)
			outboundRay.OutboundInput().CloseError()
			outboundRay.OutboundOutput().CloseError()
			return err
		}

		return nil
	}

	if request.Command == protocol.RequestCommandUDP {

		writer := &UDPWriter{
			Writer:  conn,
			Request: request,
//.........这里部分代码省略.........

func (v *VMessOutboundHandler) Dispatch(target v2net.Destination, payload *buf.Buffer, ray ray.OutboundRay) {
	defer ray.OutboundInput().Release()
	defer ray.OutboundOutput().Close()

	var rec *protocol.ServerSpec
	var conn internet.Connection

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

		return nil
	})
	if err != nil {
		log.Warning("VMess|Outbound: Failed to find an available destination:", err)
		return
	}
	log.Info("VMess|Outbound: Tunneling request to ", target, " via ", rec.Destination())

	command := protocol.RequestCommandTCP
	if target.Network == v2net.Network_UDP {
		command = protocol.RequestCommandUDP
	}
	request := &protocol.RequestHeader{
		Version: encoding.Version,
		User:    rec.PickUser(),
		Command: command,
		Address: target.Address,
		Port:    target.Port,
		Option:  protocol.RequestOptionChunkStream,
	}

	rawAccount, err := request.User.GetTypedAccount()
	if err != nil {
		log.Warning("VMess|Outbound: Failed to get user account: ", err)
	}
	account := rawAccount.(*vmess.InternalAccount)
	request.Security = account.Security

	defer conn.Close()

	conn.SetReusable(true)
	if conn.Reusable() { // Conn reuse may be disabled on transportation layer
		request.Option.Set(protocol.RequestOptionConnectionReuse)
	}

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

	var requestFinish, responseFinish sync.Mutex
	requestFinish.Lock()
	responseFinish.Lock()

	session := encoding.NewClientSession(protocol.DefaultIDHash)

	go v.handleRequest(session, conn, request, payload, input, &requestFinish)
	go v.handleResponse(session, conn, request, rec.Destination(), output, &responseFinish)

	requestFinish.Lock()
	responseFinish.Lock()
	return
}