contrib/package/freifunk-policyrouting/files/etc/hotplug.d/iface/30-policyrouting

   1 [ "$INTERFACE" != "wan" ] && exit 0
   2 [ -f /proc/net/ipv6_route ] && has_ipv6=1
   3 case $ACTION in
   4         ifup)
   5                 pr="`uci get freifunk-policyrouting.pr.enable`"
   6                 fallback="`uci get freifunk-policyrouting.pr.fallback`"
   7                 # check if ipv6 is enabled:
   8
   9                 if [ $pr = "1" ]; then
  10                         logger -s -t policyrouting "Starting policy routing on $INTERFACE"
  11
  12                         # Setup new tables
  13                         tables="/etc/iproute2/rt_tables"
  14                         if [ -z "`grep "111" $tables`" ]; then
  15                                 echo "111 olsr" >> $tables
  16                         fi
  17                         if [ -z "`grep "112" $tables`" ]; then
  18                                 echo "112 olsr-default" >> $tables
  19                         fi
  20
  21                         # Make sure Rt_tables in olsrd are in place
  22                         if [ ! "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ ! "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
  23                                 uci set olsrd.@olsrd[0].RtTable='111'
  24                                 uci set olsrd.@olsrd[0].RtTableDefault='112'
  25                                 uci commit
  26                                 /etc/init.d/olsrd restart
  27                         fi
  28
  29                         # Disable dyn_gw and dyngw_plain
  30                         dyngwlib=`uci show olsrd |grep dyn_gw.so |awk {' FS="."; print $1"."$2 '}`
  31                         if [ -n "$dyngwlib" ]; then
  32                                 uci set $dyngwlib.ignore=1
  33                                 uci commit
  34                         fi
  35
  36                         dyngwplainlib=`uci show olsrd |grep dyn_gw_plain |awk {' FS="."; print $1"."$2 '}`
  37                         if [ -n "$dyngwplainlib" ]; then
  38                                 uci set $dyngwplainlib.ignore=1
  39                                 uci commit
  40                         fi
  41
  42                         gw="$(ip r |grep default | cut -d " " -f 3)"
  43                         # if no gateway was found stop now
  44                         [ -z "$gw" ] && logger -s -t policyrouting "No gateway found" && exit 1
  45
  46                         device="`uci -q -p /var/state get network.wan.ifname`"
  47                         [ -z "$device" ] && device="`uci -q -p /var/state get network.wan.device`"
  48                         [ -z "$device" ] && logger -s -t policyrouting "No device found for wan." && exit 1
  49
  50                         test -n "`ip r s t default`" && ip r d default t default
  51                         test -n "`ip r s |grep default`" && ip route del default
  52                         ip route add default via $gw dev $device table default
  53
  54                         if [ "$has_ipv6" = 1 ]; then
  55                                 local ip6gw=$(ip -6 r |grep default |cut -d " " -f 3)
  56                                 test -n "`ip -6 r s t default`" && ip -6 r d default t default
  57                                 if [ -n "`ip -6 r s |grep default`" ]; then
  58                                         ip -6 route del default
  59                                         ip -6 r a $ip6gw via $ip6gw dev $dev table default
  60                                         ip -6 route add default via $ip6gw dev $device table default
  61                                 fi
  62                         fi
  63
  64                         ip rule del lookup main
  65                         ip rule add fwmark 1 lookup olsr-default
  66                         ip rule add lookup main
  67                         ip rule add lookup olsr
  68                         # Fallback via mesh if no ipv4 gateway is found in default table
  69                         [ "$fallback" = 1 ] && ip rule add lookup olsr-default prio 32800
  70
  71                         if [ "$has_ipv6" = 1 ]; then
  72                                 ip -6 rule del lookup main
  73                                 ip -6 rule add lookup olsr prio 16380
  74                                 ip -6 rule add lookup main prio 16390
  75                                 ip -6 rule add fwmark 1 lookup olsr-default prio 16400
  76                                 ip -6 rule add lookup default prio 16410
  77                                 [ "$fallback" = 1 ] && ip -6 rule add lookup olsr-default prio 16420
  78                         fi
  79                 else
  80                         # Remove custom routing tables from olsrd
  81                         if [ "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
  82                                 uci delete olsrd.@olsrd[0].RtTable
  83                                 uci delete olsrd.@olsrd[0].RtTableDefault
  84                                 uci commit
  85                                 /etc/init.d/olsrd restart
  86                         fi
  87                 fi
  88         ;;
  89
  90         ifdown)
  91         logger -s -t policyrouting "Deleting ipv4 policy rules for $INTERFACE"
  92         ip rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
  93         ip rule del lookup olsr-default > /dev/null 2>&1
  94         ip rule del lookup olsr > /dev/null 2>&1
  95         if [ "$has_ipv6" = 1 ]; then
  96                 logger -s -t policyrouting "Deleting ipv4 policy rules for $INTERFACE"
  97                 ip -6 rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
  98                 ip -6 rule del lookup olsr-default > /dev/null 2>&1
  99                 ip -6 rule del lookup olsr > /dev/null 2>&1
 100                 ip -6 rule del lookup default  > /dev/null 2>&1
 101         fi
 102         ;;
 103 esac