connect.c

      if(!Curl_ssl_check_cxn(c))
        *param_longp = -1;   /* FIN received */
    }
/* Minix 3.1 doesn't support any flags on recv; just assume socket is OK */
#ifdef MSG_PEEK
    else {
      /* use the socket */
      char buf;
      if(recv((RECV_TYPE_ARG1)c->sock[FIRSTSOCKET], (RECV_TYPE_ARG2)&buf,
              (RECV_TYPE_ARG3)1, (RECV_TYPE_ARG4)MSG_PEEK) == 0) {
        *param_longp = -1;   /* FIN received */
      }
    }
#endif
  }
  else
    *param_longp = -1;

  return CURLE_OK;
}