use stream instead of raw chan

app/dispatcher/testing/dispatcher.go

@@ -6,28 +6,32 @@ import (
 )
 
 type TestPacketDispatcher struct {
-	LastPacket chan v2net.Packet
-	Handler    func(packet v2net.Packet, traffic ray.OutboundRay)
+	Destination chan v2net.Destination
+	Handler     func(packet v2net.Packet, traffic ray.OutboundRay)
 }
 
 func NewTestPacketDispatcher(handler func(packet v2net.Packet, traffic ray.OutboundRay)) *TestPacketDispatcher {
 	if handler == nil {
 		handler = func(packet v2net.Packet, traffic ray.OutboundRay) {
-			for payload := range traffic.OutboundInput() {
-				traffic.OutboundOutput() <- payload.Prepend([]byte("Processed: "))
+			for {
+				payload, err := traffic.OutboundInput().Read()
+				if err != nil {
+					break
+				}
+				traffic.OutboundOutput().Write(payload.Prepend([]byte("Processed: ")))
 			}
-			close(traffic.OutboundOutput())
+			traffic.OutboundOutput().Close()
 		}
 	}
 	return &TestPacketDispatcher{
-		LastPacket: make(chan v2net.Packet, 16),
-		Handler:    handler,
+		Destination: make(chan v2net.Destination),
+		Handler:     handler,
 	}
 }
 
 func (this *TestPacketDispatcher) DispatchToOutbound(packet v2net.Packet) ray.InboundRay {
 	traffic := ray.NewRay()
-	this.LastPacket <- packet
+	this.Destination <- packet.Destination()
 	go this.Handler(packet, traffic)
 
 	return traffic

common/io/transport.go

@@ -1,43 +1,16 @@
 package io
 
-import (
-	"io"
-
-	"github.com/v2ray/v2ray-core/common/alloc"
-)
-
-func RawReaderToChan(stream chan<- *alloc.Buffer, reader io.Reader) error {
-	return ReaderToChan(stream, NewAdaptiveReader(reader))
-}
-
-// ReaderToChan dumps all content from a given reader to a chan by constantly reading it until EOF.
-func ReaderToChan(stream chan<- *alloc.Buffer, reader Reader) error {
+func Pipe(reader Reader, writer Writer) error {
 	for {
 		buffer, err := reader.Read()
 		if buffer.Len() > 0 {
-			stream <- buffer
+			err = writer.Write(buffer)
 		} else {
 			buffer.Release()
 		}
 
 		if err != nil {
-			return err
-		}
-	}
-}
-
-func ChanToRawWriter(writer io.Writer, stream <-chan *alloc.Buffer) error {
-	return ChanToWriter(NewAdaptiveWriter(writer), stream)
-}
-
-// ChanToWriter dumps all content from a given chan to a writer until the chan is closed.
-func ChanToWriter(writer Writer, stream <-chan *alloc.Buffer) error {
-	for buffer := range stream {
-		err := writer.Write(buffer)
-		buffer.Release()
-		if err != nil {
-			return err
+			return nil
 		}
 	}
-	return nil
 }

common/io/transport_test.go

@@ -1,37 +0,0 @@
-package io_test
-
-import (
-	"bytes"
-	"crypto/rand"
-	"io"
-	"testing"
-
-	"github.com/v2ray/v2ray-core/common/alloc"
-	. "github.com/v2ray/v2ray-core/common/io"
-	v2testing "github.com/v2ray/v2ray-core/testing"
-	"github.com/v2ray/v2ray-core/testing/assert"
-)
-
-func TestReaderAndWrite(t *testing.T) {
-	v2testing.Current(t)
-
-	size := 1024 * 1024
-	buffer := make([]byte, size)
-	nBytes, err := rand.Read(buffer)
-	assert.Int(nBytes).Equals(len(buffer))
-	assert.Error(err).IsNil()
-
-	readerBuffer := bytes.NewReader(buffer)
-	writerBuffer := bytes.NewBuffer(make([]byte, 0, size))
-
-	transportChan := make(chan *alloc.Buffer, 1024)
-
-	err = ReaderToChan(transportChan, NewAdaptiveReader(readerBuffer))
-	assert.Error(err).Equals(io.EOF)
-	close(transportChan)
-
-	err = ChanToRawWriter(writerBuffer, transportChan)
-	assert.Error(err).IsNil()
-
-	assert.Bytes(buffer).Equals(writerBuffer.Bytes())
-}

common/io/writer.go

@@ -32,6 +32,7 @@ func (this *AdaptiveWriter) Write(buffer *alloc.Buffer) error {
 	if nBytes < buffer.Len() {
 		_, err = this.writer.Write(buffer.Value[nBytes:])
 	}
+	buffer.Release()
 	return err
 }
 

common/log/log.go

@@ -41,8 +41,8 @@ var (
 	noOpLoggerInstance   logWriter = &noOpLogWriter{}
 	streamLoggerInstance logWriter = newStdOutLogWriter()
 
-	debugLogger   = noOpLoggerInstance
-	infoLogger    = noOpLoggerInstance
+	debugLogger   = streamLoggerInstance
+	infoLogger    = streamLoggerInstance
 	warningLogger = streamLoggerInstance
 	errorLogger   = streamLoggerInstance
 )

common/log/log_test.go

@@ -5,8 +5,8 @@ import (
 	"log"
 	"testing"
 
+	"github.com/v2ray/v2ray-core/common/platform"
 	"github.com/v2ray/v2ray-core/common/serial"
-    "github.com/v2ray/v2ray-core/common/platform"
 	v2testing "github.com/v2ray/v2ray-core/testing"
 	"github.com/v2ray/v2ray-core/testing/assert"
 )

common/net/packet.go

@@ -1,11 +1,14 @@
 package net
 
 import (
+	"github.com/v2ray/v2ray-core/common"
 	"github.com/v2ray/v2ray-core/common/alloc"
 )
 
 // Packet is a network packet to be sent to destination.
 type Packet interface {
+	common.Releasable
+
 	Destination() Destination
 	Chunk() *alloc.Buffer // First chunk of this commnunication
 	MoreChunks() bool
@@ -37,3 +40,8 @@ func (packet *packetImpl) Chunk() *alloc.Buffer {
 func (packet *packetImpl) MoreChunks() bool {
 	return packet.moreData
 }
+
+func (packet *packetImpl) Release() {
+	packet.data.Release()
+	packet.data = nil
+}

proxy/blackhole/blackhole.go

@@ -1,10 +1,7 @@
 package blackhole
 
 import (
-	"io/ioutil"
-
 	"github.com/v2ray/v2ray-core/app"
-	v2io "github.com/v2ray/v2ray-core/common/io"
 	v2net "github.com/v2ray/v2ray-core/common/net"
 	"github.com/v2ray/v2ray-core/proxy"
 	"github.com/v2ray/v2ray-core/proxy/internal"
@@ -20,14 +17,14 @@ func NewBlackHole() *BlackHole {
 }
 
 func (this *BlackHole) Dispatch(firstPacket v2net.Packet, ray ray.OutboundRay) error {
-	if chunk := firstPacket.Chunk(); chunk != nil {
-		chunk.Release()
-	}
-
-	close(ray.OutboundOutput())
-	if firstPacket.MoreChunks() {
-		v2io.ChanToRawWriter(ioutil.Discard, ray.OutboundInput())
-	}
+	firstPacket.Release()
+
+	ray.OutboundOutput().Close()
+	ray.OutboundOutput().Release()
+
+	ray.OutboundInput().Close()
+	ray.OutboundInput().Release()
+
 	return nil
 }
 

proxy/dokodemo/dokodemo.go

@@ -1,7 +1,6 @@
 package dokodemo
 
 import (
-	"io"
 	"sync"
 
 	"github.com/v2ray/v2ray-core/app/dispatcher"
@@ -126,25 +125,23 @@ func (this *DokodemoDoor) HandleTCPConnection(conn *hub.TCPConn) {
 
 	packet := v2net.NewPacket(v2net.TCPDestination(this.address, this.port), nil, true)
 	ray := this.packetDispatcher.DispatchToOutbound(packet)
+	defer ray.InboundOutput().Release()
 
 	var inputFinish, outputFinish sync.Mutex
 	inputFinish.Lock()
 	outputFinish.Lock()
 
 	reader := v2net.NewTimeOutReader(this.config.Timeout, conn)
-	go dumpInput(reader, ray.InboundInput(), &inputFinish)
-	go dumpOutput(conn, ray.InboundOutput(), &outputFinish)
+	go func() {
+		v2io.Pipe(v2io.NewAdaptiveReader(reader), ray.InboundInput())
+		inputFinish.Unlock()
+		ray.InboundInput().Close()
+	}()
 
-	outputFinish.Lock()
-}
+	go func() {
+		v2io.Pipe(ray.InboundOutput(), v2io.NewAdaptiveWriter(conn))
+		outputFinish.Unlock()
+	}()
 
-func dumpInput(reader io.Reader, input chan<- *alloc.Buffer, finish *sync.Mutex) {
-	v2io.RawReaderToChan(input, reader)
-	finish.Unlock()
-	close(input)
-}
-
-func dumpOutput(writer io.Writer, output <-chan *alloc.Buffer, finish *sync.Mutex) {
-	v2io.ChanToRawWriter(writer, output)
-	finish.Unlock()
+	outputFinish.Lock()
 }

proxy/dokodemo/dokodemo_test.go

@@ -43,7 +43,7 @@ func TestDokodemoTCP(t *testing.T) {
 	tcpClient.Write([]byte(data2Send))
 	tcpClient.CloseWrite()
 
-	lastPacket := <-testPacketDispatcher.LastPacket
+	destination := <-testPacketDispatcher.Destination
 
 	response := make([]byte, 1024)
 	nBytes, err := tcpClient.Read(response)
@@ -51,9 +51,9 @@ func TestDokodemoTCP(t *testing.T) {
 	tcpClient.Close()
 
 	assert.StringLiteral("Processed: " + data2Send).Equals(string(response[:nBytes]))
-	assert.Bool(lastPacket.Destination().IsTCP()).IsTrue()
-	netassert.Address(lastPacket.Destination().Address()).Equals(v2net.IPAddress([]byte{1, 2, 3, 4}))
-	netassert.Port(lastPacket.Destination().Port()).Equals(128)
+	assert.Bool(destination.IsTCP()).IsTrue()
+	netassert.Address(destination.Address()).Equals(v2net.IPAddress([]byte{1, 2, 3, 4}))
+	netassert.Port(destination.Port()).Equals(128)
 }
 
 func TestDokodemoUDP(t *testing.T) {
@@ -86,10 +86,9 @@ func TestDokodemoUDP(t *testing.T) {
 	udpClient.Write([]byte(data2Send))
 	udpClient.Close()
 
-	lastPacket := <-testPacketDispatcher.LastPacket
+	destination := <-testPacketDispatcher.Destination
 
-	assert.StringLiteral(data2Send).Equals(string(lastPacket.Chunk().Value))
-	assert.Bool(lastPacket.Destination().IsUDP()).IsTrue()
-	netassert.Address(lastPacket.Destination().Address()).Equals(v2net.IPAddress([]byte{5, 6, 7, 8}))
-	netassert.Port(lastPacket.Destination().Port()).Equals(256)
+	assert.Bool(destination.IsUDP()).IsTrue()
+	netassert.Address(destination.Address()).Equals(v2net.IPAddress([]byte{5, 6, 7, 8}))
+	netassert.Port(destination.Port()).Equals(256)
 }

proxy/freedom/freedom.go

@@ -19,6 +19,9 @@ type FreedomConnection struct {
 func (this *FreedomConnection) Dispatch(firstPacket v2net.Packet, ray ray.OutboundRay) error {
 	log.Info("Freedom: Opening connection to ", firstPacket.Destination())
 
+	defer firstPacket.Release()
+	defer ray.OutboundInput().Release()
+
 	var conn net.Conn
 	err := retry.Timed(5, 100).On(func() error {
 		rawConn, err := dialer.Dial(firstPacket.Destination())
@@ -29,7 +32,6 @@ func (this *FreedomConnection) Dispatch(firstPacket v2net.Packet, ray ray.Outbou
 		return nil
 	})
 	if err != nil {
-		close(ray.OutboundOutput())
 		log.Error("Freedom: Failed to open connection to ", firstPacket.Destination(), ": ", err)
 		return err
 	}
@@ -43,21 +45,20 @@ func (this *FreedomConnection) Dispatch(firstPacket v2net.Packet, ray ray.Outbou
 
 	if chunk := firstPacket.Chunk(); chunk != nil {
 		conn.Write(chunk.Value)
-		chunk.Release()
 	}
 
 	if !firstPacket.MoreChunks() {
 		writeMutex.Unlock()
 	} else {
 		go func() {
-			v2io.ChanToRawWriter(conn, input)
+			v2io.Pipe(input, v2io.NewAdaptiveWriter(conn))
 			writeMutex.Unlock()
 		}()
 	}
 
 	go func() {
 		defer readMutex.Unlock()
-		defer close(output)
+		defer output.Close()
 
 		var reader io.Reader = conn
 
@@ -65,7 +66,7 @@ func (this *FreedomConnection) Dispatch(firstPacket v2net.Packet, ray ray.Outbou
 			reader = v2net.NewTimeOutReader(16 /* seconds */, conn)
 		}
 
-		v2io.RawReaderToChan(output, reader)
+		v2io.Pipe(v2io.NewAdaptiveReader(reader), output)
 	}()
 
 	writeMutex.Lock()

proxy/freedom/freedom_test.go

@@ -37,15 +37,12 @@ func TestSinglePacket(t *testing.T) {
 
 	err = freedom.Dispatch(packet, traffic)
 	assert.Error(err).IsNil()
-	close(traffic.InboundInput())
+	traffic.InboundInput().Close()
 
-	respPayload := <-traffic.InboundOutput()
-	defer respPayload.Release()
+	respPayload, err := traffic.InboundOutput().Read()
+	assert.Error(err).IsNil()
 	assert.Bytes(respPayload.Value).Equals([]byte("Processed: Data to be sent to remote"))
 
-	_, open := <-traffic.InboundOutput()
-	assert.Bool(open).IsFalse()
-
 	tcpServer.Close()
 }
 
@@ -60,7 +57,4 @@ func TestUnreachableDestination(t *testing.T) {
 
 	err := freedom.Dispatch(packet, traffic)
 	assert.Error(err).IsNotNil()
-
-	_, open := <-traffic.InboundOutput()
-	assert.Bool(open).IsFalse()
 }

proxy/http/chan_reader.go

@@ -4,15 +4,16 @@ import (
 	"io"
 
 	"github.com/v2ray/v2ray-core/common/alloc"
+	v2io "github.com/v2ray/v2ray-core/common/io"
 )
 
 type ChanReader struct {
-	stream  <-chan *alloc.Buffer
+	stream  v2io.Reader
 	current *alloc.Buffer
 	eof     bool
 }
 
-func NewChanReader(stream <-chan *alloc.Buffer) *ChanReader {
+func NewChanReader(stream v2io.Reader) *ChanReader {
 	this := &ChanReader{
 		stream: stream,
 	}
@@ -21,9 +22,9 @@ func NewChanReader(stream <-chan *alloc.Buffer) *ChanReader {
 }
 
 func (this *ChanReader) fill() {
-	b, open := <-this.stream
+	b, err := this.stream.Read()
 	this.current = b
-	if !open {
+	if err != nil {
 		this.eof = true
 		this.current = nil
 	}

proxy/http/http.go

@@ -154,13 +154,14 @@ func (this *HttpProxyServer) transport(input io.Reader, output io.Writer, ray ra
 	defer wg.Wait()
 
 	go func() {
-		v2io.RawReaderToChan(ray.InboundInput(), input)
-		close(ray.InboundInput())
+		v2io.Pipe(v2io.NewAdaptiveReader(input), ray.InboundInput())
+		ray.InboundInput().Close()
 		wg.Done()
 	}()
 
 	go func() {
-		v2io.ChanToRawWriter(output, ray.InboundOutput())
+		v2io.Pipe(ray.InboundOutput(), v2io.NewAdaptiveWriter(output))
+		ray.InboundOutput().Release()
 		wg.Done()
 	}()
 }
@@ -222,7 +223,7 @@ func (this *HttpProxyServer) handlePlainHTTP(request *http.Request, dest v2net.D
 
 	packet := v2net.NewPacket(dest, requestBuffer, true)
 	ray := this.packetDispatcher.DispatchToOutbound(packet)
-	defer close(ray.InboundInput())
+	defer ray.InboundInput().Close()
 
 	var wg sync.WaitGroup
 	wg.Add(1)

proxy/shadowsocks/shadowsocks.go

@@ -204,7 +204,7 @@ func (this *Shadowsocks) handleConnection(conn *hub.TCPConn) {
 	var writeFinish sync.Mutex
 	writeFinish.Lock()
 	go func() {
-		if payload, ok := <-ray.InboundOutput(); ok {
+		if payload, err := ray.InboundOutput().Read(); err == nil {
 			payload.SliceBack(ivLen)
 			rand.Read(payload.Value[:ivLen])
 
@@ -219,7 +219,8 @@ func (this *Shadowsocks) handleConnection(conn *hub.TCPConn) {
 			payload.Release()
 
 			writer := crypto.NewCryptionWriter(stream, conn)
-			v2io.ChanToRawWriter(writer, ray.InboundOutput())
+			v2io.Pipe(ray.InboundOutput(), v2io.NewAdaptiveWriter(writer))
+			ray.InboundOutput().Release()
 		}
 		writeFinish.Unlock()
 	}()
@@ -232,8 +233,8 @@ func (this *Shadowsocks) handleConnection(conn *hub.TCPConn) {
 		payloadReader = v2io.NewAdaptiveReader(reader)
 	}
 
-	v2io.ReaderToChan(ray.InboundInput(), payloadReader)
-	close(ray.InboundInput())
+	v2io.Pipe(payloadReader, ray.InboundInput())
+	ray.InboundInput().Close()
 	payloadReader.Release()
 
 	writeFinish.Lock()

proxy/socks/socks.go

@@ -276,14 +276,15 @@ func (this *SocksServer) transport(reader io.Reader, writer io.Writer, firstPack
 	outputFinish.Lock()
 
 	go func() {
-		v2io.RawReaderToChan(input, reader)
+		v2io.Pipe(v2io.NewAdaptiveReader(reader), input)
 		inputFinish.Unlock()
-		close(input)
+		input.Close()
 	}()
 
 	go func() {
-		v2io.ChanToRawWriter(writer, output)
+		v2io.Pipe(output, v2io.NewAdaptiveWriter(writer))
 		outputFinish.Unlock()
+		output.Release()
 	}()
 	outputFinish.Lock()
 }

proxy/testing/mocks/inboundhandler.go

@@ -42,13 +42,14 @@ func (this *InboundConnectionHandler) Communicate(packet v2net.Packet) error {
 	writeFinish.Lock()
 
 	go func() {
-		v2io.RawReaderToChan(input, this.ConnInput)
-		close(input)
+		v2io.Pipe(v2io.NewAdaptiveReader(this.ConnInput), input)
+		input.Close()
 		readFinish.Unlock()
 	}()
 
 	go func() {
-		v2io.ChanToRawWriter(this.ConnOutput, output)
+		v2io.Pipe(output, v2io.NewAdaptiveWriter(this.ConnOutput))
+		output.Release()
 		writeFinish.Unlock()
 	}()
 

proxy/testing/mocks/outboundhandler.go

@@ -33,15 +33,16 @@ func (this *OutboundConnectionHandler) Dispatch(packet v2net.Packet, ray ray.Out
 		writeFinish.Lock()
 
 		go func() {
-			v2io.ChanToRawWriter(this.ConnOutput, input)
+			v2io.Pipe(input, v2io.NewAdaptiveWriter(this.ConnOutput))
 			writeFinish.Unlock()
+			input.Release()
 		}()
 
 		writeFinish.Lock()
 	}
 
-	v2io.RawReaderToChan(output, this.ConnInput)
-	close(output)
+	v2io.Pipe(v2io.NewAdaptiveReader(this.ConnInput), output)
+	output.Close()
 
 	return nil
 }

proxy/vmess/inbound/inbound.go

@@ -145,7 +145,7 @@ func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
 	connReader.SetTimeOut(userSettings.PayloadReadTimeout)
 	reader.SetCached(false)
 	go func() {
-		defer close(input)
+		defer input.Close()
 		defer readFinish.Unlock()
 		bodyReader := session.DecodeRequestBody(reader)
 		var requestReader v2io.Reader
@@ -154,7 +154,7 @@ func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
 		} else {
 			requestReader = v2io.NewAdaptiveReader(bodyReader)
 		}
-		v2io.ReaderToChan(input, requestReader)
+		v2io.Pipe(requestReader, input)
 		requestReader.Release()
 	}()
 
@@ -170,7 +170,7 @@ func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
 	bodyWriter := session.EncodeResponseBody(writer)
 
 	// Optimize for small response packet
-	if data, open := <-output; open {
+	if data, err := output.Read(); err == nil {
 		if request.Option.IsChunkStream() {
 			vmessio.Authenticate(data)
 		}
@@ -183,7 +183,8 @@ func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
 			if request.Option.IsChunkStream() {
 				writer = vmessio.NewAuthChunkWriter(writer)
 			}
-			v2io.ChanToWriter(writer, output)
+			v2io.Pipe(output, writer)
+			output.Release()
 			writer.Release()
 			finish.Unlock()
 		}(&writeFinish)

proxy/vmess/outbound/outbound.go

@@ -5,7 +5,6 @@ import (
 	"sync"
 
 	"github.com/v2ray/v2ray-core/app"
-	"github.com/v2ray/v2ray-core/common/alloc"
 	v2io "github.com/v2ray/v2ray-core/common/io"
 	"github.com/v2ray/v2ray-core/common/log"
 	v2net "github.com/v2ray/v2ray-core/common/net"
@@ -60,7 +59,7 @@ func (this *VMessOutboundHandler) startCommunicate(request *proto.RequestHeader,
 	if err != nil {
 		log.Error("Failed to open ", dest, ": ", err)
 		if ray != nil {
-			close(ray.OutboundOutput())
+			ray.OutboundOutput().Close()
 		}
 		return err
 	}
@@ -83,10 +82,12 @@ func (this *VMessOutboundHandler) startCommunicate(request *proto.RequestHeader,
 	requestFinish.Lock()
 	conn.CloseWrite()
 	responseFinish.Lock()
+	output.Close()
+	input.Release()
 	return nil
 }
 
-func (this *VMessOutboundHandler) handleRequest(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, firstPacket v2net.Packet, input <-chan *alloc.Buffer, finish *sync.Mutex) {
+func (this *VMessOutboundHandler) handleRequest(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, firstPacket v2net.Packet, input v2io.Reader, finish *sync.Mutex) {
 	defer finish.Unlock()
 
 	writer := v2io.NewBufferedWriter(conn)
@@ -97,15 +98,6 @@ func (this *VMessOutboundHandler) handleRequest(session *raw.ClientSession, conn
 	firstChunk := firstPacket.Chunk()
 	moreChunks := firstPacket.MoreChunks()
 
-	for firstChunk == nil && moreChunks {
-		firstChunk, moreChunks = <-input
-	}
-
-	if firstChunk == nil && !moreChunks {
-		log.Warning("VMessOut: Nothing to send. Existing...")
-		return
-	}
-
 	if request.Option.IsChunkStream() {
 		vmessio.Authenticate(firstChunk)
 	}
@@ -121,15 +113,14 @@ func (this *VMessOutboundHandler) handleRequest(session *raw.ClientSession, conn
 		if request.Option.IsChunkStream() {
 			streamWriter = vmessio.NewAuthChunkWriter(streamWriter)
 		}
-		v2io.ChanToWriter(streamWriter, input)
+		v2io.Pipe(input, streamWriter)
 		streamWriter.Release()
 	}
 	return
 }
 
-func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, dest v2net.Destination, output chan<- *alloc.Buffer, finish *sync.Mutex) {
+func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, dest v2net.Destination, output v2io.Writer, finish *sync.Mutex) {
 	defer finish.Unlock()
-	defer close(output)
 
 	reader := v2io.NewBufferedReader(conn)
 	defer reader.Release()
@@ -151,7 +142,7 @@ func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, con
 		bodyReader = v2io.NewAdaptiveReader(decryptReader)
 	}
 
-	v2io.ReaderToChan(output, bodyReader)
+	v2io.Pipe(bodyReader, output)
 	bodyReader.Release()
 
 	return

shell/point/point.go

@@ -199,13 +199,17 @@ func (this *Point) FilterPacketAndDispatch(packet v2net.Packet, link ray.Outboun
 	chunk := packet.Chunk()
 	moreChunks := packet.MoreChunks()
 	changed := false
+	var err error
 	for chunk == nil && moreChunks {
 		changed = true
-		chunk, moreChunks = <-link.OutboundInput()
+		chunk, err = link.OutboundInput().Read()
+		if err != nil {
+			moreChunks = false
+		}
 	}
 	if chunk == nil && !moreChunks {
 		log.Info("Point: No payload to dispatch, stopping dispatching now.")
-		close(link.OutboundOutput())
+		link.OutboundOutput().Close()
 		return
 	}
 

tools/build/go_test.go

@@ -20,10 +20,10 @@ func TestBuildAndRun(t *testing.T) {
 	gopath := os.Getenv("GOPATH")
 	goOS := parseOS(runtime.GOOS)
 	goArch := parseArch(runtime.GOARCH)
-    target := filepath.Join(gopath, "src", "v2ray_test")
-    if goOS == Windows {
-        target += ".exe"
-    }
+	target := filepath.Join(gopath, "src", "v2ray_test")
+	if goOS == Windows {
+		target += ".exe"
+	}
 	err := buildV2Ray(target, "v1.0", goOS, goArch)
 	assert.Error(err).IsNil()
 

transport/hub/udp_server.go

@@ -32,7 +32,7 @@ func (this *UDPServer) locateExistingAndDispatch(dest string, packet v2net.Packe
 	this.RLock()
 	defer this.RUnlock()
 	if entry, found := this.conns[dest]; found {
-		entry.inboundRay.InboundInput() <- packet.Chunk()
+		entry.inboundRay.InboundInput().Write(packet.Chunk())
 		return true
 	}
 	return false
@@ -55,8 +55,12 @@ func (this *UDPServer) Dispatch(source v2net.Destination, packet v2net.Packet, c
 }
 
 func (this *UDPServer) handleConnection(destString string, inboundRay ray.InboundRay, source v2net.Destination, callback UDPResponseCallback) {
-	for buffer := range inboundRay.InboundOutput() {
-		callback(v2net.NewPacket(source, buffer, false))
+	for {
+		data, err := inboundRay.InboundOutput().Read()
+		if err != nil {
+			break
+		}
+		callback(v2net.NewPacket(source, data, false))
 	}
 	this.Lock()
 	delete(this.conns, destString)

transport/ray/direct.go

@@ -1,6 +1,9 @@
 package ray
 
 import (
+	"io"
+	"sync"
+
 	"github.com/v2ray/v2ray-core/common/alloc"
 )
 
@@ -11,28 +14,101 @@ const (
 // NewRay creates a new Ray for direct traffic transport.
 func NewRay() Ray {
 	return &directRay{
-		Input:  make(chan *alloc.Buffer, bufferSize),
-		Output: make(chan *alloc.Buffer, bufferSize),
+		Input:  NewStream(),
+		Output: NewStream(),
 	}
 }
 
 type directRay struct {
-	Input  chan *alloc.Buffer
-	Output chan *alloc.Buffer
+	Input  *Stream
+	Output *Stream
 }
 
-func (this *directRay) OutboundInput() <-chan *alloc.Buffer {
+func (this *directRay) OutboundInput() InputStream {
 	return this.Input
 }
 
-func (this *directRay) OutboundOutput() chan<- *alloc.Buffer {
+func (this *directRay) OutboundOutput() OutputStream {
 	return this.Output
 }
 
-func (this *directRay) InboundInput() chan<- *alloc.Buffer {
+func (this *directRay) InboundInput() OutputStream {
 	return this.Input
 }
 
-func (this *directRay) InboundOutput() <-chan *alloc.Buffer {
+func (this *directRay) InboundOutput() InputStream {
 	return this.Output
 }
+
+type Stream struct {
+	access sync.RWMutex
+	closed bool
+	buffer chan *alloc.Buffer
+}
+
+func NewStream() *Stream {
+	return &Stream{
+		buffer: make(chan *alloc.Buffer, bufferSize),
+	}
+}
+
+func (this *Stream) Read() (*alloc.Buffer, error) {
+	if this.buffer == nil {
+		return nil, io.EOF
+	}
+	this.access.RLock()
+	defer this.access.RUnlock()
+	if this.buffer == nil {
+		return nil, io.EOF
+	}
+	result, open := <-this.buffer
+	if !open {
+		return nil, io.EOF
+	}
+	return result, nil
+}
+
+func (this *Stream) Write(data *alloc.Buffer) error {
+	if this.closed {
+		return io.EOF
+	}
+	if this.buffer == nil {
+		return io.EOF
+	}
+	this.access.RLock()
+	defer this.access.RUnlock()
+	if this.buffer == nil {
+		return io.EOF
+	}
+	this.buffer <- data
+	return nil
+}
+
+func (this *Stream) Close() {
+	if this.closed {
+		return
+	}
+	this.access.RLock()
+	defer this.access.RUnlock()
+	if this.closed {
+		return
+	}
+	this.closed = true
+	close(this.buffer)
+}
+
+func (this *Stream) Release() {
+	if this.buffer == nil {
+		return
+	}
+	this.Close()
+	this.access.Lock()
+	defer this.access.Unlock()
+	if this.buffer == nil {
+		return
+	}
+	for data := range this.buffer {
+		data.Release()
+	}
+	this.buffer = nil
+}

transport/ray/ray.go

@@ -1,19 +1,19 @@
 package ray
 
 import (
-	"github.com/v2ray/v2ray-core/common/alloc"
+	v2io "github.com/v2ray/v2ray-core/common/io"
 )
 
 // OutboundRay is a transport interface for outbound connections.
 type OutboundRay interface {
 	// OutboundInput provides a stream for the input of the outbound connection.
 	// The outbound connection shall write all the input until it is closed.
-	OutboundInput() <-chan *alloc.Buffer
+	OutboundInput() InputStream
 
 	// OutboundOutput provides a stream to retrieve the response from the
 	// outbound connection. The outbound connection shall close the channel
 	// after all responses are receivced and put into the channel.
-	OutboundOutput() chan<- *alloc.Buffer
+	OutboundOutput() OutputStream
 }
 
 // InboundRay is a transport interface for inbound connections.
@@ -21,12 +21,12 @@ type InboundRay interface {
 	// InboundInput provides a stream to retrieve the request from client.
 	// The inbound connection shall close the channel after the entire request
 	// is received and put into the channel.
-	InboundInput() chan<- *alloc.Buffer
+	InboundInput() OutputStream
 
 	// InboudBound provides a stream of data for the inbound connection to write
 	// as response. The inbound connection shall write all the data from the
 	// channel until it is closed.
-	InboundOutput() <-chan *alloc.Buffer
+	InboundOutput() InputStream
 }
 
 // Ray is an internal tranport channel between inbound and outbound connection.
@@ -34,3 +34,13 @@ type Ray interface {
 	InboundRay
 	OutboundRay
 }
+
+type InputStream interface {
+	v2io.Reader
+	Close()
+}
+
+type OutputStream interface {
+	v2io.Writer
+	Close()
+}