package/network/ipv6/6in4/files/6in4.sh

   1 #!/bin/sh
   2 # 6in4.sh - IPv6-in-IPv4 tunnel backend
   3 # Copyright (c) 2010-2014 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 tos ipaddr peeraddr ip6addr ip6prefix tunnelid username password updatekey sourcerouting
  18         json_get_vars mtu ttl tos ipaddr peeraddr ip6addr ip6prefix tunnelid username password updatekey sourcerouting
  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
  38         local source=""
  39         [ "$sourcerouting" != "0" ] && source="::/128"
  40         proto_add_ipv6_route "::" 0 "" "" "" "$source"
  41
  42         [ -n "$ip6addr" ] && {
  43                 local local6="${ip6addr%%/*}"
  44                 local mask6="${ip6addr##*/}"
  45                 [[ "$local6" = "$mask6" ]] && mask6=
  46                 proto_add_ipv6_address "$local6" "$mask6"
  47                 [ "$sourcerouting" != "0" ] && proto_add_ipv6_route "::" 0 "" "" "" "$local6/$mask6"
  48         }
  49
  50         [ -n "$ip6prefix" ] && {
  51                 proto_add_ipv6_prefix "$ip6prefix"
  52                 [ "$sourcerouting" != "0" ] && proto_add_ipv6_route "::" 0 "" "" "" "$ip6prefix"
  53         }
  54
  55         proto_add_tunnel
  56         json_add_string mode sit
  57         json_add_int mtu "${mtu:-1280}"
  58         json_add_int ttl "${ttl:-64}"
  59         [ -n "$tos" ] && json_add_string tos "$tos"
  60         json_add_string local "$ipaddr"
  61         json_add_string remote "$peeraddr"
  62         proto_close_tunnel
  63
  64         proto_send_update "$cfg"
  65
  66         [ -n "$tunnelid" -a -n "$username" -a \( -n "$password" -o -n "$updatekey" \) ] && {
  67                 [ -n "$updatekey" ] && password="$updatekey"
  68
  69                 local http="http"
  70                 local urlget="wget"
  71                 local urlget_opts="-qO/dev/stdout"
  72                 local ca_path="${SSL_CERT_DIR-/etc/ssl/certs}"
  73
  74                 if [ -n "$(which curl)" ]; then
  75                         urlget="curl"
  76                         urlget_opts="-s -S"
  77                         if curl -V | grep "Protocols:" | grep -qF "https"; then
  78                                 http="https"
  79                                 urlget_opts="$urlget_opts --capath $ca_path"
  80                         fi
  81                 fi
  82                 if [ "$http" = "http" ] &&
  83                         wget --version 2>&1 | grep -qF "+https"; then
  84                         urlget="wget"
  85                         urlget_opts="-qO/dev/stdout --ca-directory=$ca_path"
  86                         http="https"
  87                 fi
  88                 [ "$http" = "https" -a -z "$(find $ca_path -name "*.0" 2>/dev/null)" ] && {
  89                         if [ "$urlget" = "curl" ]; then
  90                                 urlget_opts="$urlget_opts -k"
  91                         else
  92                                 urlget_opts="$urlget_opts --no-check-certificate"
  93                         fi
  94                 }
  95
  96                 local url="$http://ipv4.tunnelbroker.net/nic/update?username=$username&password=$password&hostname=$tunnelid"
  97                 local try=0
  98                 local max=3
  99
 100                 while [ $((++try)) -le $max ]; do
 101                         ( exec $urlget $urlget_opts "$url" | logger -t "$link" ) &
 102                         local pid=$!
 103                         ( sleep 20; kill $pid 2>/dev/null ) &
 104                         wait $pid && break
 105                         sleep 20;
 106                 done
 107         }
 108 }
 109
 110 proto_6in4_teardown() {
 111         local cfg="$1"
 112 }
 113
 114 proto_6in4_init_config() {
 115         no_device=1
 116         available=1
 117
 118         proto_config_add_string "ipaddr"
 119         proto_config_add_string "ip6addr"
 120         proto_config_add_string "ip6prefix"
 121         proto_config_add_string "peeraddr"
 122         proto_config_add_string "tunnelid"
 123         proto_config_add_string "username"
 124         proto_config_add_string "password"
 125         proto_config_add_string "updatekey"
 126         proto_config_add_int "mtu"
 127         proto_config_add_int "ttl"
 128         proto_config_add_string "tos"
 129         proto_config_add_boolean "sourcerouting"
 130 }
 131
 132 [ -n "$INCLUDE_ONLY" ] || {
 133         add_protocol 6in4
 134 }