6in4: add support for native IPv6 prefix handling
[openwrt.git] / package / network / ipv6 / 6in4 / files / 6in4.sh
1 #!/bin/sh
2 # 6in4.sh - IPv6-in-IPv4 tunnel backend
3 # Copyright (c) 2010-2012 OpenWrt.org
4
5 [ -n "$INCLUDE_ONLY" ] || {
6         . /lib/functions.sh
7         . /lib/functions/network.sh
8         . ../netifd-proto.sh
9         init_proto "$@"
10 }
11
12 proto_6in4_setup() {
13         local cfg="$1"
14         local iface="$2"
15         local link="6in4-$cfg"
16
17         local mtu ttl ipaddr peeraddr ip6addr ip6prefix tunnelid username password
18         json_get_vars mtu ttl ipaddr peeraddr ip6addr ip6prefix tunnelid username password
19
20         [ -z "$peeraddr" ] && {
21                 proto_notify_error "$cfg" "MISSING_ADDRESS"
22                 proto_block_restart "$cfg"
23                 return
24         }
25
26         ( proto_add_host_dependency "$cfg" 0.0.0.0 )
27
28         [ -z "$ipaddr" ] && {
29                 local wanif
30                 if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then
31                         proto_notify_error "$cfg" "NO_WAN_LINK"
32                         return
33                 fi
34         }
35
36         proto_init_update "$link" 1
37         proto_add_ipv6_route "::" 0
38
39         [ -n "$ip6addr" ] && {
40                 local local6="${ip6addr%%/*}"
41                 local mask6="${ip6addr##*/}"
42                 [[ "$local6" = "$mask6" ]] && mask6=
43                 proto_add_ipv6_address "$local6" "$mask6"
44         }
45
46         [ -n "$ip6prefix" ] && proto_add_ipv6_prefix "$ip6prefix"
47
48         proto_add_tunnel
49         json_add_string mode sit
50         json_add_int mtu "${mtu:-1280}"
51         json_add_int ttl "${ttl:-64}"
52         json_add_string local "$ipaddr"
53         json_add_string remote "$peeraddr"
54         proto_close_tunnel
55
56         proto_send_update "$cfg"
57
58         [ -n "$tunnelid" -a -n "$username" -a -n "$password" ] && {
59                 [ "${#password}" == 32 -a -z "${password//[a-fA-F0-9]/}" ] || {
60                         password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
61                 }
62
63                 local url="http://ipv4.tunnelbroker.net/ipv4_end.php?ip=AUTO&apikey=$username&pass=$password&tid=$tunnelid"
64                 local try=0
65                 local max=3
66
67                 while [ $((++try)) -le $max ]; do
68                         wget -qO/dev/null "$url" 2>/dev/null && break
69                         sleep 1
70                 done
71         }
72 }
73
74 proto_6in4_teardown() {
75         local cfg="$1"
76 }
77
78 proto_6in4_init_config() {
79         no_device=1             
80         available=1
81
82         proto_config_add_string "ipaddr"
83         proto_config_add_string "ip6addr"
84         proto_config_add_string "ip6prefix"
85         proto_config_add_string "peeraddr"
86         proto_config_add_string "tunnelid"
87         proto_config_add_string "username"
88         proto_config_add_string "password"
89         proto_config_add_int "mtu"
90         proto_config_add_int "ttl"
91 }
92
93 [ -n "$INCLUDE_ONLY" ] || {
94         add_protocol 6in4
95 }