internal byte[] Recv()
{
if (sock == null)
{
throw new PDBException(PDBErrorCode.PdbE_NET_ERROR, "网络错误：未连接");
}
int totalLen = 0;
byte[] headBuf = new byte[ProtoHeader.kHeadLen];
while (totalLen < ProtoHeader.kHeadLen)
{
int tmpLen = ProtoHeader.kHeadLen - totalLen;
int recvLen = sock.GetStream().Read(headBuf, totalLen, tmpLen);
totalLen += recvLen;
}
ProtoHeader proHdr = new ProtoHeader(headBuf);
UInt32 headCrc = proHdr.GetHeadCrc();
UInt32 tmpHeadCrc = CRC.Crc32(headBuf, 0, 60);
if (headCrc != tmpHeadCrc)
{
throw new PDBException(PDBErrorCode.PdbE_NET_ERROR, "报文错误：回复报文中，回复头校验错误");
}
int bodyLen = (int)proHdr.GetBodyLen();
if (bodyLen == 0)
{
return(headBuf);
}
byte[] packetBuf = new byte[ProtoHeader.kHeadLen + bodyLen];
Array.Copy(headBuf, 0, packetBuf, 0, ProtoHeader.kHeadLen);
totalLen = 0;
while (totalLen < bodyLen)
{
int tmpLen = bodyLen - totalLen;
int recvLen = sock.GetStream().Read(packetBuf, (ProtoHeader.kHeadLen + totalLen), tmpLen);
totalLen += recvLen;
}
UInt32 bodyCrc = proHdr.GetBodyCrc();
UInt32 tmpBodyCrc = CRC.Crc32(packetBuf, ProtoHeader.kHeadLen, bodyLen);
if (tmpBodyCrc != bodyCrc)
{
throw new PDBException(PDBErrorCode.PdbE_PACKET_ERROR, "报文错误：回复报文中，回复头校验错误");
}
return(packetBuf);
}