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/* Port probe functions -*- mfl -*-
Copyright (C) 2010, 2011 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 defined(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
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