[backfire] merge r27449
[openwrt-10.03/.git] / 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-f0-9]/}" ] || {
41                                         password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
42                                 }
43
44                                 (
45                                         local url="http://ipv4.tunnelbroker.net/ipv4_end.php?ipv4b=AUTO&user_id=$username&pass=$password&tunnel_id=$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