Add freifunk-policyrouting and luci-app-freifunk-policyrouting

[project/luci.git] / contrib / package / freifunk-policyrouting / files / etc / hotplug.d / firewall / 24-policyrouting

diff --git a/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/firewall/24-policyrouting b/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/firewall/24-policyrouting
new file mode 100644 (file)
index 0000000..3e6f815
--- /dev/null
+++ b/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/firewall/24-policyrouting
@@ -0,0 +1,72 @@
+if [ "$ACTION" = "add" ] && [ "$INTERFACE" = "wan" ]; then
+       pr=`uci get freifunk-policyrouting.pr.enable`
+       strict=`uci get freifunk-policyrouting.pr.strict`
+       zones=`uci get freifunk-policyrouting.pr.zones`
+
+       if [ $pr = "1" ]; then
+
+               # The wan device name
+               if  [ -n "`uci -p /var/state get network.wan.ifname`" ]; then
+                       wandev=`uci -p /var/state get network.wan.ifname`
+               else
+                       wandev=`uci -p /var/state get network.wan.device`
+               fi
+
+               iptables -t mangle -D PREROUTING -j prerouting_policy > /dev/null 2>&1
+               iptables -t mangle -F prerouting_policy > /dev/null 2>&1
+               iptables -t mangle -N prerouting_policy > /dev/null 2>&1
+               iptables -t mangle -I PREROUTING -j prerouting_policy > /dev/null 2>&1
+
+               # If no route is in table olsr-default, then usually the hosts local default route is used.
+               # If set to strict then we add a filter which prevents this
+               if [ "$strict" == "1" ]; then
+                       ln=$(( `iptables -L FORWARD -v --line-numbers | grep -m 1 reject | awk {' print $1 '}` - 1 ))
+                       if [ ! $ln -gt 0 ]; then
+                               ln=1
+                       fi
+                       if [ -z "`iptables -L |grep 'Chain forward_policy'`" ]; then
+                               iptables -N forward_policy
+                       fi
+                       if [ -z "`iptables -L FORWARD -v |grep forward_policy`" ]; then
+                               iptables -I FORWARD $ln -m mark --mark 1 -j forward_policy
+                       fi
+                       iptables -F forward_policy
+                       iptables -I forward_policy -o $wandev -j REJECT --reject-with icmp-net-prohibited
+               fi
+
+               # set mark 1 for all packets coming in via enabled zones
+               for i in $zones; do
+                       # find out which interfaces belong to this zone
+                       zone=`uci show firewall |grep "name=$i" |awk {' FS="."; print $1"."$2 '}`
+                       interfaces=`uci get $zone.network`
+                       if [ "$interfaces" == "" ]; then
+                               interfaces=$i
+                       fi
+                       for int in $interfaces; do
+                               if [ "`uci -q get network.$int.type`" == "bridge" ]; then 
+                                       dev="br-$int"
+                               else
+                                       dev=`uci get network.$int.ifname`
+                               fi
+                               logger -t policyrouting "Add mark 1 to packages coming in via interface $dev"
+                               iptables -t mangle -I prerouting_policy -i $dev -j MARK --set-mark 1
+                       done
+               done
+       else
+               # Cleanup policy routing stuff that might be lingering around
+               if [ -n "`iptables -t mangle -L PREROUTING |grep _policy`" ]; then
+                       logger -t policyrouting "Delete prerouting_policy chain in table mangle"
+                       iptables -t mangle -D PREROUTING -j prerouting_policy
+                       iptables -t mangle -F prerouting_policy
+                       iptables -t mangle -X prerouting_policy
+               fi
+               if [ -n "`iptables -L FORWARD |grep forward_policy`" ]; then
+                       logger -t policyrouting "Delete strict forwarding rules"
+                       iptables -D FORWARD -m mark --mark 1 -j forward_policy
+                       iptables -F forward_policy
+                       iptables -X forward_policy
+               fi
+               logger -t policyrouting "All firewall rules for policyrouting removed."
+       fi
+fi
+