#!/bin/bash
#Copyright 2003 William Stearns <wstearns@pobox.com>
#Released under the GPL.

Me='local-output-accept'
MyVersion='0.4.1'
DefaultActions='ACCEPT'

[ -r /etc/modwall/modwall.conf ] &&			. /etc/modwall/modwall.conf
[ -r /etc/modwall/$Me.conf ] &&				. /etc/modwall/$Me.conf
[ -r ${MWLibDir:-'/usr/lib/modwall/'}/modwalllib ] &&	. ${MWLibDir:-'/usr/lib/modwall/'}/modwalllib
if [ -z "$MWLibVer" ]; then
	echo 'It looks like modwalllib was not loaded, why?  Exiting' >&2
	exit 1
fi

for OneTask in $Tasks ; do
	case "$OneTask" in
	link)
		$IptablesBin -N $Me >/dev/null 2>&1
		$IptablesBin $AppIn OUTPUT							-j $Me
		;;
	unlink)
		$IptablesBin -D OUTPUT								-j $Me
		$IptablesBin -X $Me >/dev/null 2>&1
		;;
	create)
		echo "Starting $Me" >&2
		FlushOrNewChain $Me
#ZZZZ Your actual firewall rules go here.  Write one line per type of malicious traffic.
#ZZZZ _If_ the user chooses to log this packet, the optional LogAs='...' specifies what log ID string to use.
#ZZZZ The "$Ipt" and "$Tail" pair handle the fact that the user may wish to specify more than one
#ZZZZ action for malicious traffic (LOG, DROP, REJECT, etc.).  All you need to do is specify the characteristics
#ZZZZ in between "-A $Me" and "$Tail".  Sample lines follow; please delete them once you've written your own.
		#			$IptablesBin -A $Me -s 127.0.0.1			-j RETURN
		#LogAs='ICMP-AMQ'	$Ipt -A $Me -p icmp --icmp-type address-mask-request	$Tail








		;;
	destroy)
		echo "Stopping $Me" >&2
		DestroyChain $Me
		;;
	renamechain)
		TempChain="$Me-$RANDOM"
		echo "Replacing existing rules in $Me with new rules" >&2
		$IptablesBin -E $Me $TempChain
		;;
	replacelinks)
		if [ -z "$TempChain" ]; then
			echo "No temporary chain to relink in $Me replacelinks, replace operation incomplete." >&2
		elif ! $IptablesBin -L $Me -n >/dev/null 2>&1 ; then
			echo "No $Me chain in $Me, replace operation incomplete." >&2
		elif ! $IptablesBin -L $TempChain -n >/dev/null 2>&1 ; then
			echo "No $TempChain chain in $Me, replace operation incomplete." >&2
		elif [ "`$IptablesBin -L OUTPUT -n --line-numbers | grep $TempChain | wc -l`" -ne 1 ]; then
			echo "Too few/many references to $TempChain in OUTPUT in $Me replacelinks, replace operation incomplete." >&2
		else
			$IptablesBin -R OUTPUT `$IptablesBin -L OUTPUT -n --line-numbers | grep $TempChain | awk '{print $1}'`			-j $Me
			DestroyChain $TempChain
			unset TempChain
		fi
		;;
	status)
		if $IptablesBin -L $Me -n >/dev/null 2>&1 ; then
			echo "$Me created" >&2
		else
			echo "$Me destroyed" >&2
		fi
		;;
	version)
		echo "$Me $MyVersion, modwalllib $MWLibVer" >&2
		;;
	help)
		DefaultHelp
		cat <<EOTEXT >&2
	The $Me module is for locally defined rules of OUTPUT traffic
that is to be accepted.
EOTEXT
		;;
	*)
		echo "Unknown action $Action in $Me, no action taken." >&2
		;;
	esac
done