Question

如何检查Socket是否断开

Answer 1

Windows下通过WSASend、WSARecv函数的返回值和错误代码判断，而者缺一不可！
iRet = WSARecv(pClient->m_Socket, &(pBuffer->m_WsaBuffer), 1, &lIoSize, &lFlags, &(pBuffer->m_Olp), NULL);
if(SOCKET_ERROR == iRet && ERROR_IO_PENDING != WSAGetLastError())
{
TRACE("ServerIoThread WSARecv call ClearClient: %d\r\n",pClient->m_Socket);
pThis->ClearClient(pClient,pBuffer);
}