grepip

#!/bin/bash
# Author:  Michal Ambroz <rebus@seznam.cz>
# License: GPLv2+
#
#     Copyright (C) 2018  Michal Ambroz <rebus@seznam.cz>
#
#     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, see <http://www.gnu.org/licenses/>.
#
# Example:
#     grepip [-u] malware.vba
#     -u ... list only unique IP addresses
#


PATTERN='(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)[[]{0,1}\.[]]{0,1}){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'

if [ "x$1" = "x-u" ] ; then
	shift
	grep --color -o -i -P -e "$PATTERN" "$@" | sed -e 's|[][]||g;' | sort -n -u
else
	exec grep --color -i -P -e "$PATTERN" "$@"
fi