package/6in4/files/6in4.hotplug

   1 #!/bin/sh
   2
   3 if [ "$ACTION" = ifup ]; then
   4         . /etc/functions.sh
   5
   6         include /lib/network
   7         scan_interfaces
   8
   9         update_tunnel() {
  10                 local cfg="$1"
  11
  12                 local proto
  13                 config_get proto "$cfg" proto
  14                 [ "$proto" = 6in4 ] || return 0
  15
  16                 local wandev
  17                 config_get wandev "$cfg" wan_device "$(find_6in4_wanif)"
  18                 [ "$wandev" = "$DEVICE" ] || return 0
  19
  20                 local wanip=$(find_6in4_wanip "$wandev")
  21
  22                 [ -n "$wanip" ] && {
  23                         lsmod | grep -q ^sit || {
  24                                 logger -t 6in4-update "Tunneling driver not loaded yet, deferring action"
  25                                 exit 0
  26                         }
  27
  28                         local tunnelid
  29                         config_get tunnelid "$cfg" tunnelid
  30
  31                         local username
  32                         config_get username "$cfg" username
  33
  34                         local password
  35                         config_get password "$cfg" password
  36
  37                         uci_set_state network "$cfg" ipaddr "$wanip"
  38
  39                         [ -n "$tunnelid" ] && [ -n "$username" ] && [ -n "$password" ] && {
  40                                 [ "${#password}" == 32 -a -z "${password//[a-fA-F0-9]/}" ] || {
  41                                         password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
  42                                 }
  43
  44                                 (
  45                                         local url="http://ipv4.tunnelbroker.net/ipv4_end.php?ip=AUTO&apikey=$username&pass=$password&tid=$tunnelid"
  46                                         local try=0
  47                                         local max=3
  48
  49                                         while [ $((++try)) -le $max ]; do
  50                                                 wget -qO/dev/null "$url" 2>/dev/null && {
  51                                                         logger -t 6in4-update "Updated tunnel #$tunnelid endpoint to $wanip"
  52                                                         ifup "$cfg"
  53                                                         break
  54                                                 } || {
  55                                                         logger -t 6in4-update "Try $try/$max failed, retrying"
  56                                                         sleep 1
  57                                                 }
  58                                         done
  59                                 )&
  60                         } || {
  61                                 logger -t 6in4-update "Re-establishing tunnel due to change on $INTERFACE ($DEVICE)"
  62                                 ifup "$cfg" &
  63                         }
  64                 }
  65         }
  66
  67         config_foreach update_tunnel interface
  68 fi