From e1b417ee76bd97a05854f4304cef3f73e9da633b Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Wed, 5 Apr 2006 02:09:22 +0000
Subject: large init script cleanup and merge of whiterussian changes, new
 dnsmasq config handling

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3588 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 package/iptables/files/firewall.awk | 64 +++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 package/iptables/files/firewall.awk

(limited to 'package/iptables/files/firewall.awk')

diff --git a/package/iptables/files/firewall.awk b/package/iptables/files/firewall.awk
new file mode 100644
index 0000000000..1b63f83862
--- /dev/null
+++ b/package/iptables/files/firewall.awk
@@ -0,0 +1,64 @@
+BEGIN {
+	print "proto=\"$wan_proto\""
+	print "[ -z \"$proto\" -o \"$proto\" = \"none\" ] && exit"
+	print "ifname=\"$wan_ifname\""
+	print "[ -z \"$ifname\" ] && exit"
+	print ""
+	print "iptables -X input_$ifname 2>&- >&-"
+	print "iptables -N input_$ifname"
+	print "iptables -X forward_$ifname 2>&- >&-"
+	print "iptables -N forward_$ifname"
+	print "iptables -t nat -X prerouting_$ifname 2>&- >&-"
+	print "iptables -t nat -N prerouting_$ifname"
+	print ""
+	print "iptables -A input_rule -i \"$ifname\" -j input_$ifname"
+	print "iptables -A forwarding_rule -i \"$ifname\" -j forward_$ifname"
+	print "iptables -t nat -A prerouting_rule -i \"$ifname\" -j prerouting_$ifname"
+	print ""
+	FS=":"
+}
+
+($1 == "accept") || ($1 == "drop") || ($1 == "forward") {
+	delete _opt
+	str2data($2)
+	if ((_l["proto"] == "") && (_l["sport"] _l["dport"] != "")) {
+		_opt[0] = " -p tcp"
+		_opt[1] = " -p udp"
+	} else {
+		_opt[0] = ""
+	}
+}
+
+($1 == "accept") {
+	target = " -j ACCEPT"
+	for (o in _opt) {
+		print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
+		print "iptables        -A input_$ifname     " _opt[o] str2ipt($2) target
+		print ""
+	}
+}
+
+($1 == "drop") {
+	for (o in _opt) {
+		print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) " -j DROP"
+		print ""
+	}
+}
+
+($1 == "forward") {
+	target = " -j DNAT --to " $3
+	fwopts = ""
+	if ($4 != "") {
+		if ((_l["proto"] == "tcp") || (_l["proto"] == "udp") || (_l["proto"] == "")) {
+			if (_l["proto"] != "") fwopts = " -p " _l["proto"]
+			fwopts = fwopts " --dport " $4
+			target = target ":" $4
+		}
+		else fwopts = ""
+	}
+	for (o in _opt) {
+		print "iptables -t nat -A prerouting_$ifname" _opt[o] str2ipt($2) target
+		print "iptables        -A forward_$ifname   " _opt[o] " -d " $3 fwopts " -j ACCEPT"
+		print ""
+	}
+}
-- 
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