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#!/bin/sh
# ip-to-devinfo - IP (through arping or ping and arp cache) to MAC IEEE and
# custom information
# Copyright (C) 2009 Daniel Dickinson
# 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 2 of the License, 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
ARP=arp
MACTODEV=mac-to-devinfo
usage() {
echo "Usage: $0 [-i interface] [-x port] IP-address"
}
if [ "$1" == "-i" ]; then
INTERFACE="$2"
if [ -z "$INTERFACE" ]; then
echo "-i without interface"
usage
exit 1
fi
shift
shift
fi
if [ "$1" == "-x" ]; then
PORT="-x $2"
if [ -z "$PORT" ]; then
echo "-x without the port"
usage
exit 1
fi
shift
shift
fi
IP="$1"
shift
if [ -z "$IP" ]; then
echo "Must specify IP address"
usage
exit 1
fi
if [ ! -x "$(which $ARP)" ]; then
do_arp() {
cat /proc/net/arp
}
ARPMACFIELD=4
else
do_arp() {
$ARP -n
}
ARPMACFIELD=3
fi
if [ -z "$INTERFACE" ]; then
ping -q -c 2 $IP >/dev/null
MAC=$(do_arp|grep "$IP "|tr -s \ | cut -f$ARPMACFIELD -d\ )
else
MAC=$(arping -f -c 5 -I $INTERFACE $IP | grep 'Unicast reply from' | cut -f2 -d \[ | cut -f1 -d\])
fi
$MACTODEV $PORT $MAC
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