drop the '0' default in config_get_bool

[openwrt.git] / package / iptables / files / firewall.init

diff --git a/package/iptables/files/firewall.init b/package/iptables/files/firewall.init
index 9d8a405..204310a 100755 (executable)
--- a/package/iptables/files/firewall.init
+++ b/package/iptables/files/firewall.init
@@ -11,6 +11,13 @@ start() {
        config_get WAN wan ifname
        config_get WANDEV wan device
        config_get LAN lan ifname
+       config_get_bool NAT_LAN lan nat 1
+       if [ $NAT_LAN -ne 0 ]
+       then
+               config_get LAN_MASK lan netmask
+               config_get LAN_IP lan ipaddr
+               LAN_NET=$(/bin/ipcalc.sh $LAN_IP $LAN_MASK | grep NETWORK | cut -d= -f2)
+       fi
        
        ## CLEAR TABLES
        for T in filter nat; do
@@ -105,10 +112,11 @@ start() {
        iptables -t nat -A PREROUTING -j prerouting_rule
        [ -z "$WAN" ] || iptables -t nat -A PREROUTING -i "$WAN" -j prerouting_wan
        iptables -t nat -A POSTROUTING -j postrouting_rule
-       ### Only RFC1918 addresses
-       [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src 192.168.0.0/16 -o $WAN -j MASQUERADE
-       [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src 172.16.0.0/12 -o $WAN -j MASQUERADE
-       [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src 10.0.0.0/8 -o $WAN -j MASQUERADE
+       ### Only LAN, unless told not to
+       if [ $NAT_LAN -ne 0 ]
+       then
+               [ -z "$WAN" ] || iptables -t nat -A POSTROUTING --src $LAN_NET/$LAN_MASK -o $WAN -j MASQUERADE
+       fi
 
        iptables -t nat -A NEW -m limit --limit 50 --limit-burst 100 -j RETURN && \
                iptables -t nat -A NEW -j DROP