Esempio n. 1
0
func (this *ChunkReader) Read() (*alloc.Buffer, error) {
	buffer := alloc.NewLargeBuffer()
	if _, err := io.ReadFull(this.reader, buffer.Value[:2]); err != nil {
		alloc.Release(buffer)
		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.BytesLiteral(buffer.Value[:2]).Uint16Value() + AuthSize
	if _, err := io.ReadFull(this.reader, buffer.Value[:length]); err != nil {
		alloc.Release(buffer)
		return nil, err
	}
	buffer.Slice(0, int(length))

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

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

	return buffer, nil
}
Esempio n. 2
0
// 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 {
	for {
		buffer, err := reader.Read()
		if alloc.Len(buffer) > 0 {
			stream <- buffer
		} else {
			alloc.Release(buffer)
		}

		if err != nil {
			return err
		}
	}
}
Esempio n. 3
0
func (this *AdaptiveReader) Read() (*alloc.Buffer, error) {
	buffer, err := ReadFrom(this.reader, this.allocate())

	if buffer.IsFull() && !this.isLarge {
		this.allocate = alloc.NewLargeBuffer
		this.isLarge = true
	} else if !buffer.IsFull() {
		this.allocate = alloc.NewBuffer
		this.isLarge = false
	}

	if err != nil {
		alloc.Release(buffer)
		return nil, err
	}
	return buffer, nil
}