From 87281df9037fc10f244c4f31e9731cc1332f8dad Mon Sep 17 00:00:00 2001
From: jow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Thu, 30 Jun 2011 01:31:23 +0000
Subject: [package] firewall: 	- allow multiple ports, protocols, macs, icmp
 types per rule 	- implement "limit" and "limit_burst" options for
 rules 	- implement "extra" option to rules and redirects for passing
 arbritary flags to iptables 	- implement negations for "src_port",
 "dest_port", "src_dport", "src_mac", "proto" and "icmp_type" options 	-
 allow wildcard (*) "src" and "dest" options in rules to allow specifying
 "any" source or destination 	- validate symbolic icmp-type names against
 the selected iptables binary 	- properly handle forwarded ICMPv6 traffic in
 the default configuration

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@27317 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 package/firewall/files/lib/core_redirect.sh | 56 ++++++++++++++++-------------
 1 file changed, 31 insertions(+), 25 deletions(-)

(limited to 'package/firewall/files/lib/core_redirect.sh')

diff --git a/package/firewall/files/lib/core_redirect.sh b/package/firewall/files/lib/core_redirect.sh
index 64c619e43..f511d2915 100644
--- a/package/firewall/files/lib/core_redirect.sh
+++ b/package/firewall/files/lib/core_redirect.sh
@@ -13,11 +13,11 @@ fw_config_get_redirect() {
 		string src_dport "" \
 		string dest "" \
 		ipaddr dest_ip "" \
-		string dest_mac "" \
 		string dest_port "" \
 		string proto "tcpudp" \
 		string family "" \
 		string target "DNAT" \
+		string extra "" \
 	} || return
 	[ -n "$redirect_name" ] || redirect_name=$redirect__name
 }
@@ -29,26 +29,27 @@ fw_load_redirect() {
 
 	local fwdchain natchain natopt nataddr natports srcdaddr srcdports
 	if [ "$redirect_target" == "DNAT" ]; then
-		[ -n "$redirect_src" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
+		[ -n "${redirect_src#*}" -a -n "$redirect_dest_ip$redirect_dest_port" ] || {
 			fw_log error "DNAT redirect ${redirect_name}: needs src and dest_ip or dest_port, skipping"
 			return 0
 		}
 
-		fwdchain="zone_${redirect_src}${redirect_dest_ip:+_forward}"
+		fwdchain="zone_${redirect_src}_forward"
 
 		natopt="--to-destination"
 		natchain="zone_${redirect_src}_prerouting"
 		nataddr="$redirect_dest_ip"
-		fw_get_port_range natports "$redirect_dest_port" "-"
+		fw_get_port_range natports "${redirect_dest_port#!}" "-"
 
 		fw_get_negation srcdaddr '-d' "${redirect_src_dip:+$redirect_src_dip/$redirect_src_dip_prefixlen}"
 		fw_get_port_range srcdports "$redirect_src_dport" ":"
+		fw_get_negation srcdports '--dport' "$srcdports"
 
 		list_contains FW_CONNTRACK_ZONES $redirect_src || \
 			append FW_CONNTRACK_ZONES $redirect_src
 
 	elif [ "$redirect_target" == "SNAT" ]; then
-		[ -n "$redirect_dest" -a -n "$redirect_src_dip" ] || {
+		[ -n "${redirect_dest#*}" -a -n "$redirect_src_dip" ] || {
 			fw_log error "SNAT redirect ${redirect_name}: needs dest and src_dip, skipping"
 			return 0
 		}
@@ -58,10 +59,11 @@ fw_load_redirect() {
 		natopt="--to-source"
 		natchain="zone_${redirect_dest}_nat"
 		nataddr="$redirect_src_dip"
-		fw_get_port_range natports "$redirect_src_dport" "-"
+		fw_get_port_range natports "${redirect_src_dport#!}" "-"
 
 		fw_get_negation srcdaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
 		fw_get_port_range srcdports "$redirect_dest_port" ":"
+		fw_get_negation srcdports '--dport' "$srcdports"
 
 		list_contains FW_CONNTRACK_ZONES $redirect_dest || \
 			append FW_CONNTRACK_ZONES $redirect_dest
@@ -79,34 +81,38 @@ fw_load_redirect() {
 
 	local srcports
 	fw_get_port_range srcports "$redirect_src_port" ":"
+	fw_get_negation srcports '--sport' "$srcports"
 
 	local destaddr
 	fw_get_negation destaddr '-d' "${redirect_dest_ip:+$redirect_dest_ip/$redirect_dest_ip_prefixlen}"
 
 	local destports
 	fw_get_port_range destports "${redirect_dest_port:-$redirect_src_dport}" ":"
+	fw_get_negation destports '--dport' "$destports"
 
 	[ "$redirect_proto" == "tcpudp" ] && redirect_proto="tcp udp"
 	for redirect_proto in $redirect_proto; do
-		local pos
-		eval 'pos=$((++FW__REDIR_COUNT_'${mode#G}'_'$natchain'))'
-
-		fw add $mode n $natchain $redirect_target $pos { $redirect_src_ip $redirect_dest_ip } { \
-			$srcaddr $srcdaddr \
-			${redirect_proto:+-p $redirect_proto} \
-			${srcports:+--sport $srcports} \
-			${srcdports:+--dport $srcdports} \
-			${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
-			$natopt $nataddr${natports:+:$natports} \
-		}
-
-		fw add $mode f ${fwdchain:-forward} ACCEPT ^ { $redirect_src_ip $redirect_dest_ip } { \
-			$srcaddr ${destaddr:--m conntrack --ctstate DNAT} \
-			${redirect_proto:+-p $redirect_proto} \
-			${srcports:+--sport $srcports} \
-			${destports:+--dport $destports} \
-			${redirect_src_mac:+-m mac --mac-source $redirect_src_mac} \
-		}
+		fw_get_negation redirect_proto '-p' "$redirect_proto"
+		for redirect_src_mac in ${redirect_src_mac:-""}; do
+			fw_get_negation redirect_src_mac '--mac-source' "$redirect_src_mac"
+			fw add $mode n $natchain $redirect_target + \
+				{ $redirect_src_ip $redirect_dest_ip } { \
+				$srcaddr $srcdaddr $redirect_proto \
+				$srcports $srcdports \
+				${redirect_src_mac:+-m mac $redirect_src_mac} \
+				$natopt $nataddr${natports:+:$natports} \
+				$redirect_options \
+			}
+
+			[ -n "$destaddr" ] && \
+			fw add $mode f ${fwdchain:-forward} ACCEPT + \
+				{ $redirect_src_ip $redirect_dest_ip } { \
+				$srcaddr $destaddr $redirect_proto \
+				$srcports $destports \
+				$redirect_src_mac \
+				$redirect_extra \
+			}
+		done
 	done
 
 	fw_callback post redirect
-- 
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