/* -*- buffer-read-only: t -*- vi: set ro:
   THIS FILE IS GENERATED AUTOMATICALLY.  PLEASE DO NOT EDIT.
*/
#line 1 "portprobe.mf4"
/* Port probe functions                                   -*- mfl -*-
   Copyright (C) 2010-2020 Sergey Poznyakoff

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */

module 'portprobe'.

func portprobe(string host; number port)
  alias listens
  returns number
do
  try
  do
    if not $#>@port
      set port 25
    fi
    if not host matches '^[a-z][a-z0-9]*://'
      set host "inet://%host"
    fi
    /* FIXME: Optionally set source IP address and connection time out. */
    close(open("@ %host:%port"))
    return 1
  done
  catch *
  do
    return 0
  done
done