这是CTransferSocket_hawk的类实现文件，以下成员变量用于数据发送：数据缓存区,为一个先入先出队列，注意:队列中的数据比原始数据多4+BEGIN_TAG_LENGTH个字节,其中前4个字节用来存放原始数据的长度,接下来存放BEGIN_TAG.远程端需要长度来确定将要接收的数据块尺寸,并利用BEGIN_TAG，来判断是否有错误发生。-This is CTransferSocket_hawk class implementation file, the following member variable for data transmission: data buffer, a FIFO queue, Note: The data in the queue more than the original data, 4+ BEGIN_TAG_LENGTH bytes, of which the first 4 bytes the length used to store raw data, then store BEGIN_TAG. remote clients need to determine the length of the data block size to receive and use BEGIN_TAG, to determine whether an error occurred.