Golang alloc.NewLargeBuffer函數代碼示例

func TestBufferedReader(t *testing.T) {
	v2testing.Current(t)

	content := alloc.NewLargeBuffer()
	len := content.Len()

	reader := NewBufferedReader(content)
	assert.Bool(reader.Cached()).IsTrue()

	payload := make([]byte, 16)

	nBytes, err := reader.Read(payload)
	assert.Int(nBytes).Equals(16)
	assert.Error(err).IsNil()

	len2 := content.Len()
	assert.Int(len - len2).GreaterThan(16)

	nBytes, err = reader.Read(payload)
	assert.Int(nBytes).Equals(16)
	assert.Error(err).IsNil()

	assert.Int(content.Len()).Equals(len2)
	reader.SetCached(false)

	payload2 := alloc.NewBuffer()
	reader.Read(payload2.Value)

	assert.Int(content.Len()).Equals(len2)

	reader.Read(payload2.Value)
	assert.Int(content.Len()).LessThan(len2)
}

func (this *ChunkReader) Read() (*alloc.Buffer, error) {
	buffer := alloc.NewLargeBuffer()
	if _, err := io.ReadFull(this.reader, buffer.Value[:2]); err != nil {
		buffer.Release()
		return nil, err
	}
	// There is a potential buffer overflow here. Large buffer is 64K bytes,
	// while uin16 + 10 will be more than that
	length := serial.BytesToUint16(buffer.Value[:2]) + AuthSize
	if _, err := io.ReadFull(this.reader, buffer.Value[:length]); err != nil {
		buffer.Release()
		return nil, err
	}
	buffer.Slice(0, int(length))

	authBytes := buffer.Value[:AuthSize]
	payload := buffer.Value[AuthSize:]

	actualAuthBytes := this.auth.Authenticate(nil, payload)
	if !bytes.Equal(authBytes, actualAuthBytes) {
		buffer.Release()
		log.Debug("AuthenticationReader: Unexpected auth: ", authBytes)
		return nil, transport.ErrorCorruptedPacket
	}
	buffer.Value = payload

	return buffer, nil
}

func (this *VMessInboundHandler) HandleConnection(connection *net.TCPConn) error {
	defer connection.Close()

	connReader := v2net.NewTimeOutReader(16, connection)
	requestReader := protocol.NewVMessRequestReader(this.clients)

	request, err := requestReader.Read(connReader)
	if err != nil {
		log.Access(connection.RemoteAddr().String(), "", log.AccessRejected, err.Error())
		log.Warning("VMessIn: Invalid request from (%s): %v", connection.RemoteAddr().String(), err)
		return err
	}
	log.Access(connection.RemoteAddr().String(), request.Address.String(), log.AccessAccepted, "")
	log.Debug("VMessIn: Received request for %s", request.Address.String())

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

	userSettings := vmess.GetUserSettings(request.User.Level)
	connReader.SetTimeOut(userSettings.PayloadReadTimeout)
	go handleInput(request, connReader, input, &readFinish)

	responseKey := md5.Sum(request.RequestKey)
	responseIV := md5.Sum(request.RequestIV)

	aesStream, err := v2crypto.NewAesEncryptionStream(responseKey[:], responseIV[:])
	if err != nil {
		log.Error("VMessIn: Failed to create AES decryption stream: %v", err)
		close(input)
		return err
	}

	responseWriter := v2crypto.NewCryptionWriter(aesStream, connection)

	// Optimize for small response packet
	buffer := alloc.NewLargeBuffer().Clear()
	defer buffer.Release()
	buffer.AppendBytes(request.ResponseHeader[0] ^ request.ResponseHeader[1])
	buffer.AppendBytes(request.ResponseHeader[2] ^ request.ResponseHeader[3])
	buffer.AppendBytes(byte(0), byte(0))

	if data, open := <-output; open {
		buffer.Append(data.Value)
		data.Release()
		responseWriter.Write(buffer.Value)
		go handleOutput(request, responseWriter, output, &writeFinish)
		writeFinish.Lock()
	}

	connection.CloseWrite()
	readFinish.Lock()

	return nil
}

func (handler *VMessInboundHandler) HandleConnection(connection *net.TCPConn) error {
	defer connection.Close()

	connReader := v2net.NewTimeOutReader(16, connection)
	requestReader := protocol.NewVMessRequestReader(handler.clients)

	request, err := requestReader.Read(connReader)
	if err != nil {
		log.Access(connection.RemoteAddr().String(), "", log.AccessRejected, err.Error())
		log.Warning("VMessIn: Invalid request from (%s): %v", connection.RemoteAddr().String(), err)
		return err
	}
	log.Access(connection.RemoteAddr().String(), request.Address.String(), log.AccessAccepted, "")
	log.Debug("VMessIn: Received request for %s", request.Address.String())

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

	connReader.SetTimeOut(120)
	go handleInput(request, connReader, input, &readFinish)

	responseKey := md5.Sum(request.RequestKey)
	responseIV := md5.Sum(request.RequestIV)

	responseWriter, err := v2io.NewAesEncryptWriter(responseKey[:], responseIV[:], connection)
	if err != nil {
		log.Error("VMessIn: Failed to create encrypt writer: %v", err)
		return err
	}

	// Optimize for small response packet
	buffer := alloc.NewLargeBuffer().Clear()
	buffer.Append(request.ResponseHeader)

	if data, open := <-output; open {
		buffer.Append(data.Value)
		data.Release()
		responseWriter.Write(buffer.Value)
		buffer.Release()
		go handleOutput(request, responseWriter, output, &writeFinish)
		writeFinish.Lock()
	}

	connection.CloseWrite()
	readFinish.Lock()

	return nil
}

func TestAdaptiveWriter(t *testing.T) {
	assert := assert.On(t)

	lb := alloc.NewLargeBuffer()
	rand.Read(lb.Value)

	writeBuffer := make([]byte, 0, 1024*1024)

	writer := NewAdaptiveWriter(NewBufferedWriter(bytes.NewBuffer(writeBuffer)))
	err := writer.Write(lb)
	assert.Error(err).IsNil()
	assert.Bytes(lb.Bytes()).Equals(writeBuffer)
}

func TestBufferedWriter(t *testing.T) {
	v2testing.Current(t)

	content := alloc.NewLargeBuffer().Clear()

	writer := NewBufferedWriter(content)
	assert.Bool(writer.Cached()).IsTrue()

	payload := make([]byte, 16)

	nBytes, err := writer.Write(payload)
	assert.Int(nBytes).Equals(16)
	assert.Error(err).IsNil()

	assert.Bool(content.IsEmpty()).IsTrue()

	writer.SetCached(false)
	assert.Int(content.Len()).Equals(16)
}

func NewValidationReader(reader io.Reader) *ValidationReader {
	return &ValidationReader{
		reader: reader,
		buffer: alloc.NewLargeBuffer().Clear(),
	}
}

func TestLargeIO(t *testing.T) {
	assert := assert.On(t)

	content := make([]byte, 1024*1024)
	rand.Read(content)

	chunckContent := bytes.NewBuffer(make([]byte, 0, len(content)*2))
	writer := NewAuthChunkWriter(v2io.NewAdaptiveWriter(chunckContent))
	writeSize := 0
	for {
		chunkSize := 7 * 1024
		if chunkSize+writeSize > len(content) {
			chunkSize = len(content) - writeSize
		}
		writer.Write(alloc.NewBuffer().Clear().Append(content[writeSize : writeSize+chunkSize]))
		writeSize += chunkSize
		if writeSize == len(content) {
			break
		}

		chunkSize = 8 * 1024
		if chunkSize+writeSize > len(content) {
			chunkSize = len(content) - writeSize
		}
		writer.Write(alloc.NewLargeBuffer().Clear().Append(content[writeSize : writeSize+chunkSize]))
		writeSize += chunkSize
		if writeSize == len(content) {
			break
		}

		chunkSize = 63 * 1024
		if chunkSize+writeSize > len(content) {
			chunkSize = len(content) - writeSize
		}
		writer.Write(alloc.NewLargeBuffer().Clear().Append(content[writeSize : writeSize+chunkSize]))
		writeSize += chunkSize
		if writeSize == len(content) {
			break
		}

		chunkSize = 64*1024 - 16
		if chunkSize+writeSize > len(content) {
			chunkSize = len(content) - writeSize
		}
		writer.Write(alloc.NewLargeBuffer().Clear().Append(content[writeSize : writeSize+chunkSize]))
		writeSize += chunkSize
		if writeSize == len(content) {
			break
		}
	}
	writer.Write(alloc.NewBuffer().Clear())
	writer.Release()

	actualContent := make([]byte, 0, len(content))
	reader := NewAuthChunkReader(chunckContent)
	for {
		buffer, err := reader.Read()
		if err == io.EOF {
			break
		}
		assert.Error(err).IsNil()
		actualContent = append(actualContent, buffer.Value...)
	}

	assert.Int(len(actualContent)).Equals(len(content))
	assert.Bytes(actualContent).Equals(content)
}

func (this *VMessInboundHandler) HandleConnection(connection *hub.TCPConn) {
	defer connection.Close()

	connReader := v2net.NewTimeOutReader(16, connection)
	requestReader := protocol.NewVMessRequestReader(this.clients)

	request, err := requestReader.Read(connReader)
	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.Address, log.AccessAccepted, serial.StringLiteral(""))
	log.Debug("VMessIn: Received request for ", request.Address)

	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 := vmess.GetUserSettings(request.User.Level)
	connReader.SetTimeOut(userSettings.PayloadReadTimeout)
	go handleInput(request, connReader, input, &readFinish)

	responseKey := md5.Sum(request.RequestKey)
	responseIV := md5.Sum(request.RequestIV)

	aesStream, err := v2crypto.NewAesEncryptionStream(responseKey[:], responseIV[:])
	if err != nil {
		log.Error("VMessIn: Failed to create AES decryption stream: ", err)
		close(input)
		return
	}

	responseWriter := v2crypto.NewCryptionWriter(aesStream, connection)

	// Optimize for small response packet
	buffer := alloc.NewLargeBuffer().Clear()
	defer buffer.Release()
	buffer.AppendBytes(request.ResponseHeader, byte(0))
	this.generateCommand(buffer)

	if data, open := <-output; open {
		if request.IsChunkStream() {
			vmessio.Authenticate(data)
		}
		buffer.Append(data.Value)
		data.Release()
		responseWriter.Write(buffer.Value)
		go func(finish *sync.Mutex) {
			var writer v2io.Writer
			writer = v2io.NewAdaptiveWriter(responseWriter)
			if request.IsChunkStream() {
				writer = vmessio.NewAuthChunkWriter(writer)
			}
			v2io.ChanToWriter(writer, output)
			finish.Unlock()
		}(&writeFinish)
		writeFinish.Lock()
	}

	connection.CloseWrite()
	readFinish.Lock()
}