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 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 updatekey
  18         json_get_vars mtu ttl ipaddr peeraddr ip6addr ip6prefix tunnelid username password updatekey
  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 \( -n "$password" -o -n "$updatekey" \) ] && {
  59                 [ "${#password}" == 32 -a -z "${password//[a-fA-F0-9]/}" ] || {
  60                         password="$(echo -n "$password" | md5sum)"; password="${password%% *}"
  61                 }
  62
  63                 [ -n "$updatekey" ] && password="$updatekey"
  64
  65                 local url="http://ipv4.tunnelbroker.net/nic/update?username=$username&password=$password&hostname=$tunnelid"
  66                 local try=0
  67                 local max=3
  68
  69                 while [ $((++try)) -le $max ]; do
  70                         ( exec wget -qO/dev/null "$url" 2>/dev/null ) &
  71                         local pid=$!
  72                         ( sleep 5; kill $pid 2>/dev/null ) &
  73                         wait $pid && break
  74                 done
  75         }
  76 }
  77
  78 proto_6in4_teardown() {
  79         local cfg="$1"
  80 }
  81
  82 proto_6in4_init_config() {
  83         no_device=1
  84         available=1
  85
  86         proto_config_add_string "ipaddr"
  87         proto_config_add_string "ip6addr"
  88         proto_config_add_string "ip6prefix"
  89         proto_config_add_string "peeraddr"
  90         proto_config_add_string "tunnelid"
  91         proto_config_add_string "username"
  92         proto_config_add_string "password"
  93         proto_config_add_string "updatekey"
  94         proto_config_add_int "mtu"
  95         proto_config_add_int "ttl"
  96 }
  97
  98 [ -n "$INCLUDE_ONLY" ] || {
  99         add_protocol 6in4
 100 }