ret = recv(s, buf, sizeof(buf), 0); if (ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK) return 1; if (ret < 0)		        return -10000-WSAGetLastError(); if (ret == 0) { s = INVALID_SOCKET; return 0;
{ int clear_of_oob = 1; if (ioctlsocket (s, SIOCATMARK, &clear_of_oob) < 0 ) return -20000-WSAGetLastError();  in_synch = !clear_of_oob;  do { ret = recv(s, buf, sizeof(buf), 0); if (ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK) return 1; if (ret < 0)		        return -10000-WSAGetLastError(); if (ret == 0) { s = INVALID_SOCKET; return 0; }  do_telnet_read (buf, ret); } while (in_synch);
static int telnet_msg (WPARAM wParam, LPARAM lParam) {    int ret;    char buf[256];    /*     * Because reading less than the whole of the available pending     * data can generate an FD_READ event, we need to allow for the     * possibility that FD_READ may arrive with FD_CLOSE already in     * the queue; so it's possible that we can get here even with s     * invalid. If so, we return 1 and don't worry about it.     */    if (s == INVALID_SOCKET)	return 1;    if (WSAGETSELECTERROR(lParam) != 0)	return -WSAGETSELECTERROR(lParam);    switch (WSAGETSELECTEVENT(lParam)) {      case FD_READ:      case FD_CLOSE:	ret = recv(s, buf, sizeof(buf), 0);	if (ret < 0 && WSAGetLastError() == WSAEWOULDBLOCK)	    return 1;	if (ret < 0)		       /* any _other_ error */	    return -10000-WSAGetLastError();	if (ret == 0) {	    s = INVALID_SOCKET;	    return 0;	}#if 0	if (in_synch) {	    BOOL i;	    if (ioctlsocket (s, SIOCATMARK, &i) < 0) {		return -20000-WSAGetLastError();	    }	    if (i)		in_synch = FALSE;	}#endif	do_telnet_read (buf, ret);	return 1;      case FD_OOB:	do {	    ret = recv(s, buf, sizeof(buf), 0);	} while (ret > 0);	telnet_state = TOPLEVEL;	do {	    ret = recv(s, buf, 1, MSG_OOB);	    if (ret > 0)		do_telnet_read (buf, ret);	} while (ret > 0);	if (ret < 0 && WSAGetLastError() != WSAEWOULDBLOCK)	    return -30000-WSAGetLastError();	return 1;      case FD_WRITE:	if (outbuf_head != outbuf_reap)	    try_write();	return 1;    }    return 1;			       /* shouldn't happen, but WTF */}