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
   4 olsrd_rmtables() {
   5         # Remove custom routing tables from olsrd
   6         if [ "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
   7                 uci delete olsrd.@olsrd[0].RtTable
   8                 uci delete olsrd.@olsrd[0].RtTableDefault
   9                 uci commit
  10                 /etc/init.d/olsrd restart
  11         fi
  12 }
  13
  14 case $ACTION in
  15         ifup)
  16                 pr="`uci get freifunk-policyrouting.pr.enable`"
  17                 fallback="`uci get freifunk-policyrouting.pr.fallback`"
  18                 # check if ipv6 is enabled:
  19
  20                 if [ $pr = "1" ]; then
  21                         logger -s -t policyrouting "Starting policy routing on $INTERFACE"
  22
  23                         # Setup new tables
  24                         tables="/etc/iproute2/rt_tables"
  25                         if [ -z "`grep "111" $tables`" ]; then
  26                                 echo "111 olsr" >> $tables
  27                         fi
  28                         if [ -z "`grep "112" $tables`" ]; then
  29                                 echo "112 olsr-default" >> $tables
  30                         fi
  31
  32                         # Make sure Rt_tables in olsrd are in place
  33                         if [ ! "`uci -q get olsrd.@olsrd[0].RtTable`" == "111" ] || [ ! "`uci -q get olsrd.@olsrd[0].RtTableDefault`" == "112" ]; then
  34                                 uci set olsrd.@olsrd[0].RtTable='111'
  35                                 uci set olsrd.@olsrd[0].RtTableDefault='112'
  36                                 uci commit
  37                                 /etc/init.d/olsrd restart
  38                         fi
  39
  40                         # Disable dyn_gw and dyngw_plain
  41                         dyngwlib=`uci show olsrd |grep dyn_gw.so |awk {' FS="."; print $1"."$2 '}`
  42                         if [ -n "$dyngwlib" ]; then
  43                                 uci set $dyngwlib.ignore=1
  44                                 uci commit
  45                         fi
  46
  47                         dyngwplainlib=`uci show olsrd |grep dyn_gw_plain |awk {' FS="."; print $1"."$2 '}`
  48                         if [ -n "$dyngwplainlib" ]; then
  49                                 uci set $dyngwplainlib.ignore=1
  50                                 uci commit
  51                         fi
  52
  53                         gw="$(ip r |grep default | cut -d " " -f 3)"
  54                         # if no gateway was found stop now
  55                         [ -z "$gw" ] && logger -s -t policyrouting "No gateway found" && exit 1
  56
  57                         device="`uci -q -p /var/state get network.wan.ifname`"
  58                         [ -z "$device" ] && device="`uci -q -p /var/state get network.wan.device`"
  59                         [ -z "$device" ] && logger -s -t policyrouting "No device found for wan." && exit 1
  60
  61                         test -n "`ip r s t default`" && ip r d default t default
  62                         test -n "`ip r s |grep default`" && ip route del default
  63                         ip route add default via $gw dev $device table default
  64
  65                         if [ "$has_ipv6" = 1 ]; then
  66                                 local ip6gw=$(ip -6 r |grep default |cut -d " " -f 3)
  67                                 test -n "`ip -6 r s t default`" && ip -6 r d default t default
  68                                 if [ -n "`ip -6 r s |grep default`" ]; then
  69                                         ip -6 route del default
  70                                         ip -6 r a $ip6gw via $ip6gw dev $dev table default
  71                                         ip -6 route add default via $ip6gw dev $device table default
  72                                 fi
  73                         fi
  74
  75                         ip rule del lookup main
  76                         ip rule add fwmark 1 lookup olsr-default
  77                         ip rule add lookup main
  78                         ip rule add lookup olsr
  79                         # Fallback via mesh if no ipv4 gateway is found in default table
  80                         [ "$fallback" = 1 ] && ip rule add lookup olsr-default prio 32800
  81
  82                         if [ "$has_ipv6" = 1 ]; then
  83                                 ip -6 rule del lookup main
  84                                 ip -6 rule add lookup olsr prio 16380
  85                                 ip -6 rule add lookup main prio 16390
  86                                 ip -6 rule add fwmark 1 lookup olsr-default prio 16400
  87                                 ip -6 rule add lookup default prio 16410
  88                                 [ "$fallback" = 1 ] && ip -6 rule add lookup olsr-default prio 16420
  89                         fi
  90                 else
  91                         olsrd_rmtables
  92                 fi
  93         ;;
  94
  95         ifdown)
  96         logger -s -t policyrouting "Deleting ipv4 policy rules for $INTERFACE"
  97         olsrd_rmtables
  98         ip rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
  99         ip rule del lookup olsr-default > /dev/null 2>&1
 100         ip rule del lookup olsr > /dev/null 2>&1
 101         if [ "$has_ipv6" = 1 ]; then
 102                 logger -s -t policyrouting "Deleting ipv4 policy rules for $INTERFACE"
 103                 ip -6 rule del fwmark 1 lookup olsr-default > /dev/null 2>&1
 104                 ip -6 rule del lookup olsr-default > /dev/null 2>&1
 105                 ip -6 rule del lookup olsr > /dev/null 2>&1
 106                 ip -6 rule del lookup default  > /dev/null 2>&1
 107         fi
 108         ;;
 109 esac