#!/bin/bash

# ip-ls -- given an ip/net network, print all ip addresses in this network
# call as   $0  192.168.12.4/27
# depends: ipcalc

# Copyright (c) 2009 Uli Martens <uli@youam.net>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 1. Redistributions of source code must retain the above copyright notice,
#    this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
# 3. The name of the author may not be used to endorse or promote products
#    derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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net=$1
min=$(ipcalc $net | awk '$1=="HostMin:"{print $2}'|sed 's/\./ /g' | perl  -ane  'print $F[0]*256*256*256+$F[1]*256*256+$F[2]*256+$F[3]')
sum=$(ipcalc $net | awk '$1=="Hosts/Net:"{print $2}')
for s in $( seq 1 $sum ) ; do
	echo $[$min + $s -1 ]
done	\
  | perl -ne 'print $_/256/256/256%256,".",$_/256/256%256,".",$_/256%256,".",$_%256,"\n";'

