package/network/ipv6/6rd/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 proto_6rd_setup() {
  13         local cfg="$1"
  14         local iface="$2"
  15         local link="6rd-$cfg"
  16
  17         local mtu df ttl tos ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen tunlink zone
  18         json_get_vars mtu df ttl tos ipaddr peeraddr ip6prefix ip6prefixlen ip4prefixlen tunlink zone
  19
  20         [ -z "$ip6prefix" -o -z "$peeraddr" ] && {
  21                 proto_notify_error "$cfg" "MISSING_ADDRESS"
  22                 proto_block_restart "$cfg"
  23                 return
  24         }
  25
  26         ( proto_add_host_dependency "$cfg" "$peeraddr" "$tunlink" )
  27
  28         [ -z "$ipaddr" ] && {
  29                 local wanif="$tunlink"
  30                 if [ -z $wanif ] && ! network_find_wan wanif; then
  31                         proto_notify_error "$cfg" "NO_WAN_LINK"
  32                         return
  33                 fi
  34
  35                 if ! network_get_ipaddr ipaddr "$wanif"; then
  36                         proto_notify_error "$cfg" "NO_WAN_LINK"
  37                         return
  38                 fi
  39         }
  40
  41         # Determine the relay prefix.
  42         local ip4prefixlen="${ip4prefixlen:-0}"
  43         local ip4prefix=$(ipcalc.sh "$ipaddr/$ip4prefixlen" | grep NETWORK)
  44         ip4prefix="${ip4prefix#NETWORK=}"
  45
  46         # Determine our IPv6 address.
  47         local ip6subnet=$(6rdcalc "$ip6prefix/$ip6prefixlen" "$ipaddr/$ip4prefixlen")
  48         local ip6addr="${ip6subnet%%::*}::1"
  49
  50         # Determine the IPv6 prefix
  51         local ip6lanprefix="$ip6subnet/$(($ip6prefixlen + 32 - $ip4prefixlen))"
  52
  53         proto_init_update "$link" 1
  54         proto_add_ipv6_address "$ip6addr" "$ip6prefixlen"
  55         proto_add_ipv6_prefix "$ip6lanprefix"
  56
  57         proto_add_ipv6_route "::" 0 "::$peeraddr" 4096 "" "$ip6addr/$ip6prefixlen"
  58         proto_add_ipv6_route "::" 0 "::$peeraddr" 4096 "" "$ip6lanprefix"
  59
  60         proto_add_tunnel
  61         json_add_string mode sit
  62         json_add_int mtu "${mtu:-1280}"
  63         json_add_boolean df "${df:-1}"
  64         json_add_int ttl "${ttl:-64}"
  65         [ -n "$tos" ] && json_add_string tos "$tos"
  66         json_add_string local "$ipaddr"
  67         json_add_string 6rd-prefix "$ip6prefix/$ip6prefixlen"
  68         json_add_string 6rd-relay-prefix "$ip4prefix/$ip4prefixlen"
  69         [ -n "$tunlink" ] && json_add_string link "$tunlink"
  70         proto_close_tunnel
  71
  72         proto_add_data
  73         [ -n "$zone" ] && json_add_string zone "$zone"
  74         proto_close_data
  75
  76         proto_send_update "$cfg"
  77 }
  78
  79 proto_6rd_teardown() {
  80         local cfg="$1"
  81 }
  82
  83 proto_6rd_init_config() {
  84         no_device=1
  85         available=1
  86
  87         proto_config_add_int "mtu"
  88         proto_config_add_boolean "df"
  89         proto_config_add_int "ttl"
  90         proto_config_add_string "tos"
  91         proto_config_add_string "ipaddr"
  92         proto_config_add_string "peeraddr"
  93         proto_config_add_string "ip6prefix"
  94         proto_config_add_string "ip6prefixlen"
  95         proto_config_add_string "ip4prefixlen"
  96         proto_config_add_string "tunlink"
  97         proto_config_add_string "zone"
  98 }
  99
 100 [ -n "$INCLUDE_ONLY" ] || {
 101         add_protocol 6rd
 102 }