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

5 files changed, 202 insertions, 0 deletions

diff --git a/contrib/package/freifunk-policyrouting/Makefile b/contrib/package/freifunk-policyrouting/Makefile
new file mode 100644
index 0000000000..7ff0b07d61
--- /dev/null
+++ b/contrib/package/freifunk-policyrouting/Makefile
@@ -0,0 +1,39 @@
+# Copyright (C) 2011 Manuel Munz <freifunk at somakoma de>
+# This is free software, licensed under the Apache 2.0 license.
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=freifunk-policyrouting
+PKG_RELEASE:=1
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/freifunk-policyrouting
+  SECTION:=luci
+  CATEGORY:=LuCI
+  SUBMENU:=Freifunk
+  TITLE:=Freifunk policy routing addon
+  DEPENDS:=+firewall +ip
+endef
+
+define Package/freifunk-policyrouting/description
+  Allows you to send your own traffic via your own default gateway while sending traffic received from the mesh to a gateway in the mesh.
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+endef
+
+define Package/freifunk-policyrouting/install
+	$(CP) ./files/* $(1)/
+endef
+
+$(eval $(call BuildPackage,freifunk-policyrouting))
diff --git a/contrib/package/freifunk-policyrouting/files/etc/config/freifunk-policyrouting b/contrib/package/freifunk-policyrouting/files/etc/config/freifunk-policyrouting
new file mode 100644
index 0000000000..ba58625bc1
--- /dev/null
+++ b/contrib/package/freifunk-policyrouting/files/etc/config/freifunk-policyrouting
@@ -0,0 +1,6 @@
+
+config 'settings' 'pr'
+	option 'enable' '0'
+	option 'strict' '1'
+	option 'zones' ''
+
diff --git a/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/firewall/24-policyrouting b/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/firewall/24-policyrouting
new file mode 100644
index 0000000000..3e6f8155c2
--- /dev/null
+++ b/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/firewall/24-policyrouting
@@ -0,0 +1,72 @@
+if [ "$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 $dev -j MARK --set-mark 1
+			done
+		done
+	else
+	        # Cleanup policy routing stuff that might be lingering around
+	        if [ -n "`iptables -t mangle -L PREROUTING |grep _policy`" ]; then
+			logger -t policyrouting "Delete prerouting_policy chain in table mangle"
+	                iptables -t mangle -D PREROUTING -j prerouting_policy
+	                iptables -t mangle -F prerouting_policy
+	                iptables -t mangle -X prerouting_policy
+	        fi
+		if [ -n "`iptables -L FORWARD |grep forward_policy`" ]; then
+			logger -t policyrouting "Delete strict forwarding rules"
+			iptables -D FORWARD -m mark --mark 1 -j forward_policy
+			iptables -F forward_policy
+			iptables -X forward_policy
+		fi
+		logger -t policyrouting "All firewall rules for policyrouting removed."
+	fi
+fi
+
diff --git a/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/iface/30-policyrouting b/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/iface/30-policyrouting
new file mode 100644
index 0000000000..e3b0edeb30
--- /dev/null
+++ b/contrib/package/freifunk-policyrouting/files/etc/hotplug.d/iface/30-policyrouting
@@ -0,0 +1,78 @@
+[ "$INTERFACE" != "wan" ] && exit 0
+
+case $ACTION in
+        ifup)
+		pr=`uci get freifunk-policyrouting.pr.enable`
+		if [ $pr = "1" ]; then
+			logger -t policyrouting "Starting policy routing on $INTERFACE"
+
+			# Setup new tables
+			tables="/etc/iproute2/rt_tables"
+			if [ -z "`grep "111" $tables`" ]; then
+				echo "111 olsr" >> $tables
+			fi
+			if [ -z "`grep "112" $tables`" ]; then
+				echo "112 olsr-default" >> $tables
+			fi
+
+			# Make sure Rt_tables in olsrd are in place
+			if [ ! "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ ! "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
+				uci set olsrd.@olsrd[0].RtTable='111'
+				uci set olsrd.@olsrd[0].RtTableDefault='112'
+				uci commit
+				/etc/init.d/olsrd restart
+			fi
+
+			# Disable dyn_gw and dyngw_plain
+			dyngwlib=`uci show olsrd |grep dyn_gw.so |awk {' FS="."; print $1"."$2 '}`
+			if [ -n "$dyngwlib" ]; then
+				uci set $dyngwlib.ignore=1
+				uci commit
+			fi
+
+			dyngwplainlib=`uci show olsrd |grep dyn_gw_plain |awk {' FS="."; print $1"."$2 '}`
+			if [ -n "$dyngwplainlib" ]; then
+				uci set $dyngwplainlib.ignore=1
+				uci commit
+			fi
+	
+			gw=`uci -p /var/state get network.wan.gateway`
+			netmask=`uci -p /var/state get network.wan.netmask`
+			if [ -z "$netmask" ]; then
+				NETMASK="255.255.255.255"
+			fi
+
+			if  [ -n "`uci -p /var/state get network.wan.ifname`" ]; then
+				device=`uci -p /var/state get network.wan.ifname`
+			else
+				device=`uci -p /var/state get network.wan.device`
+			fi
+
+			eval `ipcalc.sh $gw $netmask`
+
+			test -n "`ip r s t default`" && ip r d default t default
+			test -n "`ip r s |grep default`" && ip route del default
+			ip route add $NETWORK/$NETMASK dev $device table default
+			ip route add default via $gw dev $device table default
+
+			ip rule del lookup main
+			ip rule add fwmark 1 lookup olsr-default
+			ip rule add lookup main
+			ip rule add lookup olsr
+		else
+			# Remove custom routing tables from olsrd
+			if [ "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
+				uci delete olsrd.@olsrd[0].RtTable
+				uci delete olsrd.@olsrd[0].RtTableDefault
+				uci commit
+				/etc/init.d/olsrd restart
+			fi
+		fi
+	;;
+
+	ifdown)
+	logger -t policyrouting "Deleting policy rules for $INTERFACE"
+	ip rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
+	ip rule del lookup olsr	> /dev/null 2>&1
+	;;
+esac
diff --git a/contrib/package/freifunk-policyrouting/files/etc/uci-defaults/freifunk-policyrouting b/contrib/package/freifunk-policyrouting/files/etc/uci-defaults/freifunk-policyrouting
new file mode 100644
index 0000000000..a6412d4df0
--- /dev/null
+++ b/contrib/package/freifunk-policyrouting/files/etc/uci-defaults/freifunk-policyrouting
@@ -0,0 +1,7 @@
+#!/bin/sh
+uci batch <<-EOF
+        add ucitrack freifunk-policyrouting
+        add_list ucitrack.@freifunk-policyrouting[-1].affects="network"
+        commit ucitrack
+EOF
+