Golang net.ReaderToChan函数代码示例

func (this *OutboundConnectionHandler) Dispatch(packet v2net.Packet, ray ray.OutboundRay) error {
	input := ray.OutboundInput()
	output := ray.OutboundOutput()

	this.Destination = packet.Destination()
	if packet.Chunk() != nil {
		this.ConnOutput.Write(packet.Chunk().Value)
		packet.Chunk().Release()
	}

	if packet.MoreChunks() {
		writeFinish := &sync.Mutex{}

		writeFinish.Lock()

		go func() {
			v2net.ChanToWriter(this.ConnOutput, input)
			writeFinish.Unlock()
		}()

		writeFinish.Lock()
	}

	v2net.ReaderToChan(output, this.ConnInput)
	close(output)

	return nil
}

func handleResponse(conn *net.TCPConn, request *protocol.VMessRequest, output chan<- []byte, finish *sync.Mutex) {
	defer finish.Unlock()
	defer close(output)
	responseKey := md5.Sum(request.RequestKey[:])
	responseIV := md5.Sum(request.RequestIV[:])

	decryptResponseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
	if err != nil {
		log.Error("VMessOut: Failed to create decrypt reader: %v", err)
		return
	}

	response := protocol.VMessResponse{}
	nBytes, err := decryptResponseReader.Read(response[:])
	if err != nil {
		log.Error("VMessOut: Failed to read VMess response (%d bytes): %v", nBytes, err)
		log.Error(InfoTimeNotSync)
		return
	}
	if !bytes.Equal(response[:], request.ResponseHeader[:]) {
		log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
		return
	}

	v2net.ReaderToChan(output, decryptResponseReader)
	return
}

func (this *InboundConnectionHandler) Communicate(packet v2net.Packet) error {
	ray := this.Dispatcher.DispatchToOutbound(packet)

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

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

	readFinish.Lock()
	writeFinish.Lock()

	go func() {
		v2net.ReaderToChan(input, this.ConnInput)
		close(input)
		readFinish.Unlock()
	}()

	go func() {
		v2net.ChanToWriter(this.ConnOutput, output)
		writeFinish.Unlock()
	}()

	readFinish.Lock()
	writeFinish.Lock()
	return nil
}

func handleResponse(conn net.Conn, request *protocol.VMessRequest, output chan<- []byte, finish *sync.Mutex, isUDP bool) {
	defer finish.Unlock()
	defer close(output)
	responseKey := md5.Sum(request.RequestKey[:])
	responseIV := md5.Sum(request.RequestIV[:])

	decryptResponseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
	if err != nil {
		log.Error("VMessOut: Failed to create decrypt reader: %v", err)
		return
	}

	buffer := make([]byte, 2*1024)

	nBytes, err := decryptResponseReader.Read(buffer)
	if err != nil {
		//log.Error("VMessOut: Failed to read VMess response (%d bytes): %v", nBytes, err)
		return
	}
	if !bytes.Equal(buffer[:4], request.ResponseHeader[:]) {
		log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
		return
	}

	output <- buffer[4:nBytes]

	if !isUDP {
		v2net.ReaderToChan(output, decryptResponseReader)
	}

	return
}

func handleResponse(conn net.Conn, request *protocol.VMessRequest, output chan<- *alloc.Buffer, finish *sync.Mutex, isUDP bool) {
	defer finish.Unlock()
	defer close(output)
	responseKey := md5.Sum(request.RequestKey[:])
	responseIV := md5.Sum(request.RequestIV[:])

	decryptResponseReader, err := v2io.NewAesDecryptReader(responseKey[:], responseIV[:], conn)
	if err != nil {
		log.Error("VMessOut: Failed to create decrypt reader: %v", err)
		return
	}

	buffer, err := v2net.ReadFrom(decryptResponseReader, nil)
	if err != nil {
		log.Error("VMessOut: Failed to read VMess response (%d bytes): %v", buffer.Len(), err)
		return
	}
	if buffer.Len() < 4 || !bytes.Equal(buffer.Value[:4], request.ResponseHeader[:]) {
		log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
		return
	}
	log.Info("VMessOut received %d bytes from %s", buffer.Len()-4, conn.RemoteAddr().String())

	buffer.SliceFrom(4)
	output <- buffer

	if !isUDP {
		v2net.ReaderToChan(output, decryptResponseReader)
	}

	return
}

func (this *FreedomConnection) Dispatch(firstPacket v2net.Packet, ray ray.OutboundRay) error {
	conn, err := net.Dial(firstPacket.Destination().Network(), firstPacket.Destination().Address().String())
	log.Info("Freedom: Opening connection to %s", firstPacket.Destination().String())
	if err != nil {
		close(ray.OutboundOutput())
		log.Error("Freedom: Failed to open connection: %s : %v", firstPacket.Destination().String(), err)
		return err
	}

	input := ray.OutboundInput()
	output := ray.OutboundOutput()
	var readMutex, writeMutex sync.Mutex
	readMutex.Lock()
	writeMutex.Lock()

	if chunk := firstPacket.Chunk(); chunk != nil {
		conn.Write(chunk.Value)
		chunk.Release()
	}

	if !firstPacket.MoreChunks() {
		writeMutex.Unlock()
	} else {
		go func() {
			v2net.ChanToWriter(conn, input)
			writeMutex.Unlock()
		}()
	}

	go func() {
		defer readMutex.Unlock()
		defer close(output)

		response, err := v2net.ReadFrom(conn, nil)
		log.Info("Freedom receives %d bytes from %s", response.Len(), conn.RemoteAddr().String())
		if response.Len() > 0 {
			output <- response
		} else {
			response.Release()
		}
		if err != nil {
			return
		}
		if firstPacket.Destination().IsUDP() {
			return
		}

		v2net.ReaderToChan(output, conn)
	}()

	writeMutex.Lock()
	if tcpConn, ok := conn.(*net.TCPConn); ok {
		tcpConn.CloseWrite()
	}
	readMutex.Lock()
	conn.Close()

	return nil
}

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

	requestReader, err := v2io.NewAesDecryptReader(request.RequestKey, request.RequestIV, reader)
	if err != nil {
		log.Error("VMessIn: Failed to create decrypt reader: %v", err)
		return
	}

	v2net.ReaderToChan(input, requestReader)
}

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
	}
	requestReader := v2crypto.NewCryptionReader(aesStream, reader)
	v2net.ReaderToChan(input, requestReader)
}

func handleInput(request *protocol.VMessRequest, reader io.Reader, input chan<- []byte, finish chan<- bool) {
	defer close(input)
	defer close(finish)

	requestReader, err := v2io.NewAesDecryptReader(request.RequestKey[:], request.RequestIV[:], reader)
	if err != nil {
		log.Error("VMessIn: Failed to create decrypt reader: %v", err)
		return
	}

	v2net.ReaderToChan(input, requestReader)
}

func runBenchmarkTransport(size int) {

	transportChanA := make(chan *alloc.Buffer, 16)
	transportChanB := make(chan *alloc.Buffer, 16)

	readerA := &StaticReader{size, 0}
	readerB := &StaticReader{size, 0}

	writerA := ioutil.Discard
	writerB := ioutil.Discard

	finishA := make(chan bool)
	finishB := make(chan bool)

	go func() {
		v2net.ChanToWriter(writerA, transportChanA)
		close(finishA)
	}()

	go func() {
		v2net.ReaderToChan(transportChanA, readerA)
		close(transportChanA)
	}()

	go func() {
		v2net.ChanToWriter(writerB, transportChanB)
		close(finishB)
	}()

	go func() {
		v2net.ReaderToChan(transportChanB, readerB)
		close(transportChanB)
	}()

	<-transportChanA
	<-transportChanB
}

func handleResponse(conn net.Conn, request *protocol.VMessRequest, output chan<- *alloc.Buffer, finish *sync.Mutex, isUDP bool) {
	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, err := v2net.ReadFrom(decryptResponseReader, nil)
	if err != nil {
		log.Error("VMessOut: Failed to read VMess response (", buffer.Len(), " bytes): ", err)
		buffer.Release()
		return
	}
	if buffer.Len() < 4 || !headerMatch(request, buffer.Value[:2]) {
		log.Warning("VMessOut: unexepcted response header. The connection is probably hijacked.")
		return
	}
	log.Info("VMessOut received ", buffer.Len()-4, " bytes from ", conn.RemoteAddr())

	responseBegin := 4
	if buffer.Value[2] != 0 {
		dataLen := int(buffer.Value[3])
		if buffer.Len() < dataLen+4 { // Rare case
			diffBuffer := make([]byte, dataLen+4-buffer.Len())
			v2net.ReadAllBytes(decryptResponseReader, diffBuffer)
			buffer.Append(diffBuffer)
		}
		command := buffer.Value[2]
		data := buffer.Value[4 : 4+dataLen]
		go handleCommand(command, data)
		responseBegin = 4 + dataLen
	}

	buffer.SliceFrom(responseBegin)
	output <- buffer

	if !isUDP {
		v2net.ReaderToChan(output, decryptResponseReader)
	}

	return
}

func (this *HttpProxyServer) transport(input io.Reader, output io.Writer, ray ray.InboundRay) {
	var wg sync.WaitGroup
	wg.Add(2)
	defer wg.Wait()

	go func() {
		v2net.ReaderToChan(ray.InboundInput(), input)
		close(ray.InboundInput())
		wg.Done()
	}()

	go func() {
		v2net.ChanToWriter(output, ray.InboundOutput())
		wg.Done()
	}()
}

func dumpOutput(conn net.Conn, output chan<- []byte, finish *sync.Mutex, udp bool) {
	defer finish.Unlock()
	defer close(output)

	response, err := v2net.ReadFrom(conn)
	if len(response) > 0 {
		output <- response
	}
	if err != nil {
		return
	}
	if udp {
		return
	}

	v2net.ReaderToChan(output, conn)
}

func dumpOutput(conn net.Conn, output chan<- []byte, finish *sync.Mutex, udp bool) {
	defer finish.Unlock()
	defer close(output)

	response, err := v2net.ReadFrom(conn)
	log.Info("Freedom receives %d bytes from %s", len(response), conn.RemoteAddr().String())
	if len(response) > 0 {
		output <- response
	}
	if err != nil {
		return
	}
	if udp {
		return
	}

	v2net.ReaderToChan(output, conn)
}

func dumpOutput(conn net.Conn, output chan<- *alloc.Buffer, finish *sync.Mutex, udp bool) {
	defer finish.Unlock()
	defer close(output)

	response, err := v2net.ReadFrom(conn, nil)
	log.Info("Freedom receives %d bytes from %s", response.Len(), conn.RemoteAddr().String())
	if response.Len() > 0 {
		output <- response
	} else {
		response.Release()
	}
	if err != nil {
		return
	}
	if udp {
		return
	}

	v2net.ReaderToChan(output, conn)
}