setsockopt之 TCP_KEEPIDLE/TCP_KEEPINTVL/TCP_KEEPCNT
/*檢測網線非法斷開*/
setsockopt(iSockFd, SOL_SOCKET, SO_KEEPALIVE, (void*)&KeepAlive,sizeof(KeepAlive));
setsockopt(iSockFd, SOL_TCP, TCP_KEEPIDLE, (void*)&KeepIdle,sizeof(KeepIdle));
setsockopt(iSockFd, SOL_TCP, TCP_KEEPINTVL, (void*)&KeepInterval,sizeof(KeepInterval));
setsockopt(iSockFd, SOL_TCP, TCP_KEEPCNT, (void*)&KeepCount,sizeof(KeepCount));