package/network/ipv6/ds-lite/files/dslite.sh

   1 #!/bin/sh
   2 # dslite.sh - IPv4-in-IPv6 tunnel backend
   3 # Copyright (c) 2013 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_dslite_setup() {
  13         local cfg="$1"
  14         local iface="$2"
  15         local link="ds-$cfg"
  16         local remoteip6
  17
  18         local mtu ttl peeraddr ip6addr tunlink zone weakif encaplimit
  19         json_get_vars mtu ttl peeraddr ip6addr tunlink zone weakif encaplimit
  20
  21         [ -z "$peeraddr" ] && {
  22                 proto_notify_error "$cfg" "MISSING_ADDRESS"
  23                 proto_block_restart "$cfg"
  24                 return
  25         }
  26
  27         ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
  28
  29         remoteip6=$(resolveip -6 "$peeraddr")
  30         if [ -z "$remoteip6" ]; then
  31                 sleep 3
  32                 remoteip6=$(resolveip -6 "$peeraddr")
  33                 if [ -z "$remoteip6" ]; then
  34                         proto_notify_error "$cfg" "AFTR_DNS_FAIL"
  35                         return
  36                 fi
  37         fi
  38
  39         for ip6 in $remoteip6; do
  40                 peeraddr=$ip6
  41                 break
  42         done
  43
  44         [ -z "$ip6addr" ] && {
  45                 local wanif="$tunlink"
  46                 if [ -z "$wanif" ] && ! network_find_wan6 wanif; then
  47                         proto_notify_error "$cfg" "NO_WAN_LINK"
  48                         return
  49                 fi
  50
  51                 if ! network_get_ipaddr6 ip6addr "$wanif"; then
  52                         [ -z "$weakif" ] && weakif="lan"
  53                         if ! network_get_ipaddr6 ip6addr "$weakif"; then
  54                                 proto_notify_error "$cfg" "NO_WAN_LINK"
  55                                 return
  56                         fi
  57                 fi
  58         }
  59
  60         proto_init_update "$link" 1
  61         proto_add_ipv4_route "0.0.0.0" 0
  62         proto_add_ipv4_address "192.0.0.2" "" "" "192.0.0.1"
  63
  64         proto_add_tunnel
  65         json_add_string mode ipip6
  66         json_add_int mtu "${mtu:-1280}"
  67         json_add_int ttl "${ttl:-64}"
  68         json_add_string local "$ip6addr"
  69         json_add_string remote "$peeraddr"
  70         [ -n "$tunlink" ] && json_add_string link "$tunlink"
  71         json_add_object "data"
  72           json_add_string encaplimit "${encaplimit:-4}"
  73         json_close_object
  74         proto_close_tunnel
  75
  76         proto_add_data
  77         [ -n "$zone" ] && json_add_string zone "$zone"
  78
  79         json_add_array firewall
  80           json_add_object ""
  81             json_add_string type nat
  82             json_add_string target ACCEPT
  83           json_close_object
  84         json_close_array
  85         proto_close_data
  86
  87         proto_send_update "$cfg"
  88 }
  89
  90 proto_dslite_teardown() {
  91         local cfg="$1"
  92 }
  93
  94 proto_dslite_init_config() {
  95         no_device=1
  96         available=1
  97
  98         proto_config_add_string "ip6addr"
  99         proto_config_add_string "peeraddr"
 100         proto_config_add_string "tunlink"
 101         proto_config_add_int "mtu"
 102         proto_config_add_int "ttl"
 103         proto_config_add_string "encaplimit"
 104         proto_config_add_string "zone"
 105         proto_config_add_string "weakif"
 106 }
 107
 108 [ -n "$INCLUDE_ONLY" ] || {
 109         add_protocol dslite
 110 }