package/6rd/files/6rd.sh

   1 #!/bin/sh
   2 # 6rd.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_6rd_setup() {
  20         local cfg="$1"
  21         local iface="$2"
  22         local link="6rd-$cfg"
  23
  24         local mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen
  25         json_get_vars mtu ttl ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen
  26
  27         [ -z "$ip6prefix" -o -z "$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         # Determine the relay prefix.
  41         local ip4prefixlen="${ip4prefixlen:-0}"
  42         local ip4prefix=$(ipcalc.sh "$ipaddr/$ip4prefixlen" | grep NETWORK)
  43         ip4prefix="${ip4prefix#NETWORK=}"
  44
  45         # Determine our IPv6 address.
  46         local ip6subnet=$(6rdcalc "$ip6prefix/$ip6prefixlen" "$ipaddr/$ip4prefixlen")
  47         local ip6addr="${ip6subnet%%::*}::1"
  48
  49         proto_init_update "$link" 1
  50         proto_add_ipv6_address "$ip6addr" "$ip6prefixlen"
  51         proto_add_ipv6_route "::" 0 "::$peeraddr"
  52
  53         proto_add_tunnel
  54         json_add_string mode sit
  55         json_add_int mtu "${mtu:-1280}"
  56         json_add_int ttl "${ttl:-64}"
  57         json_add_string local "$ipaddr"
  58         json_add_string 6rd-prefix "$ip6prefix/$ip6prefixlen"
  59         json_add_string 6rd-relay-prefix "$ip4prefix/$ip4prefixlen"
  60         proto_close_tunnel
  61
  62         proto_send_update "$cfg"
  63 }
  64
  65 proto_6rd_teardown() {
  66         local cfg="$1"
  67 }
  68
  69 proto_6rd_init_config() {
  70         no_device=1
  71         available=1
  72
  73         proto_config_add_int "mtu"
  74         proto_config_add_int "ttl"
  75         proto_config_add_string "peeraddr"
  76         proto_config_add_string "ip6prefix"
  77         proto_config_add_string "ip6prefixlen"
  78         proto_config_add_string "ip4prefixlen"
  79 }
  80
  81 [ -n "$INCLUDE_ONLY" ] || {
  82         add_protocol 6rd
  83 }