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 tunnelid username password
  18         json_get_vars mtu ttl ipaddr peeraddr ip6addr tunnelid username password
  19
  20         [ -z "$ip6addr" -o -z "$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         local local6="${ip6addr%%/*}"
  37         local mask6="${ip6addr##*/}"
  38         [[ "$local6" = "$mask6" ]] && mask6=
  39
  40         proto_init_update "$link" 1
  41         proto_add_ipv6_address "$local6" "$mask6"
  42         proto_add_ipv6_route "::" 0
  43
  44         proto_add_tunnel
  45         json_add_string mode sit
  46         json_add_int mtu "${mtu:-1280}"
  47         json_add_int ttl "${ttl:-64}"
  48         json_add_string local "$ipaddr"
  49         json_add_string remote "$peeraddr"
  50         proto_close_tunnel
  51
  52         proto_send_update "$cfg"
  53
  54         [ -n "$tunnelid" -a -n "$username" -a -n "$password" ] && {
  55                 [ "${#password}" == 32 -a -z "${password//[a-fA-F0-9]/}" ] || {
  56                         password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
  57                 }
  58
  59                 local url="http://ipv4.tunnelbroker.net/ipv4_end.php?ip=AUTO&apikey=$username&pass=$password&tid=$tunnelid"
  60                 local try=0
  61                 local max=3
  62
  63                 while [ $((++try)) -le $max ]; do
  64                         wget -qO/dev/null "$url" 2>/dev/null && break
  65                         sleep 1
  66                 done
  67         }
  68 }
  69
  70 proto_6in4_teardown() {
  71         local cfg="$1"
  72 }
  73
  74 proto_6in4_init_config() {
  75         no_device=1
  76         available=1
  77
  78         proto_config_add_string "ipaddr"
  79         proto_config_add_string "ip6addr"
  80         proto_config_add_string "peeraddr"
  81         proto_config_add_string "tunnelid"
  82         proto_config_add_string "username"
  83         proto_config_add_string "password"
  84         proto_config_add_int "mtu"
  85         proto_config_add_int "ttl"
  86 }
  87
  88 [ -n "$INCLUDE_ONLY" ] || {
  89         add_protocol 6in4
  90 }