package/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 tun_error() {
  13         local cfg="$1"; shift;
  14
  15         [ -n "$1" ] && proto_notify_error "$cfg" "$@"
  16         proto_block_restart "$cfg"
  17 }
  18
  19 proto_6in4_setup() {
  20         local cfg="$1"
  21         local iface="$2"
  22         local link="6in4-$cfg"
  23
  24         local mtu ttl ipaddr peeraddr ip6addr tunnelid username password
  25         json_get_vars mtu ttl ipaddr peeraddr ip6addr tunnelid username password
  26
  27         [ -z "$ip6addr" -o -z "$peeraddr" ] && {
  28                 tun_error "$cfg" "MISSING_ADDRESS"
  29                 return
  30         }
  31
  32         [ -z "$ipaddr" ] && {
  33                 local wanif
  34                 if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then
  35                         tun_error "$cfg" "NO_WAN_LINK"
  36                         return
  37                 fi
  38         }
  39
  40         local local6="${ip6addr%%/*}"
  41         local mask6="${ip6addr##*/}"
  42         [[ "$local6" = "$mask6" ]] && mask6=
  43
  44         proto_init_update "$link" 1
  45         proto_add_ipv6_address "$local6" "$mask6"
  46         proto_add_ipv6_route "::" 0
  47
  48         proto_add_tunnel
  49         json_add_string mode sit
  50         json_add_int mtu "${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="$1"
  76 }
  77
  78 proto_6in4_init_config() {
  79         no_device=1
  80         available=1
  81
  82         proto_config_add_string "ipaddr"
  83         proto_config_add_string "ip6addr"
  84         proto_config_add_string "peeraddr"
  85         proto_config_add_string "tunnelid"
  86         proto_config_add_string "username"
  87         proto_config_add_string "password"
  88         proto_config_add_int "mtu"
  89         proto_config_add_int "ttl"
  90 }
  91
  92 [ -n "$INCLUDE_ONLY" ] || {
  93         add_protocol 6in4
  94 }