From 517dfd27e557aab371105f8dd7fc108415a13d86 Mon Sep 17 00:00:00 2001
From: John Crispin <john@openwrt.org>
Date: Wed, 27 Aug 2008 12:03:48 +0000
Subject: [PATCH] adds 5 new chains to the uci firewall that can be used to
 hook custom rules

SVN-Revision: 12395
---
 package/firewall/files/uci_firewall.sh | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/package/firewall/files/uci_firewall.sh b/package/firewall/files/uci_firewall.sh
index 99663c6771..f6e82bcb69 100755
--- a/package/firewall/files/uci_firewall.sh
+++ b/package/firewall/files/uci_firewall.sh
@@ -261,6 +261,19 @@ fw_addif() {
 	(ACTION="ifup" INTERFACE="$1" . /etc/hotplug.d/iface/20-firewall)
 }
 
+fw_custom_chains() {
+	$IPTABLES -N input_rule
+	$IPTABLES -N output_rule
+	$IPTABLES -N forward_rule
+	$IPTABLES -N prerouting_rule -t nat
+	$IPTABLES -N postrouting_rule -t nat
+	$IPTABLES -A INPUT -j input_rule
+	$IPTABLES -A OUTPUT -j output_rule
+	$IPTABLES -A FORWARD -j forward_rule
+	$IPTABLES -A PREROUTING -t nat -j prerouting_rule
+	$IPTABLES -A POSTROUTING -t nat -j postrouting_rule
+}
+
 fw_init() {
 	echo "Loading defaults"
 	config_foreach fw_defaults defaults
@@ -274,7 +287,9 @@ fw_init() {
 	config_foreach fw_redirect redirect
 	echo "Loading includes"
 	config_foreach fw_include include
-	
+	echo "Adding custom chains"
+	fw_custom_chains
+
 	uci_set_state firewall core "" firewall_state 
 	uci_set_state firewall core loaded 1
 	unset CONFIG_APPEND