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

   1 #!/bin/sh
   2 # 6in4.sh - IPv6-in-IPv4 tunnel backend
   3 # Copyright (c) 2010-2015 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_update() {
  13         sh -c '
  14                 timeout=5
  15
  16                 (while [ $((timeout--)) -gt 0 ]; do
  17                         sleep 1
  18                         kill -0 $$ || exit 0
  19                 done; kill -9 $$) 2>/dev/null &
  20
  21                 exec "$@"
  22         ' "$1" "$@"
  23 }
  24
  25 proto_6in4_add_prefix() {
  26         append "$3" "$1"
  27 }
  28
  29 proto_6in4_setup() {
  30         local cfg="$1"
  31         local iface="$2"
  32         local link="6in4-$cfg"
  33
  34         local mtu ttl tos ipaddr peeraddr ip6addr ip6prefix ip6prefixes tunlink tunnelid username password updatekey
  35         json_get_vars mtu ttl tos ipaddr peeraddr ip6addr tunlink tunnelid username password updatekey
  36         json_for_each_item proto_6in4_add_prefix ip6prefix ip6prefixes
  37
  38         [ -z "$peeraddr" ] && {
  39                 proto_notify_error "$cfg" "MISSING_ADDRESS"
  40                 proto_block_restart "$cfg"
  41                 return
  42         }
  43
  44         ( proto_add_host_dependency "$cfg" "$peeraddr" "$tunlink" )
  45
  46         [ -z "$ipaddr" ] && {
  47                 local wanif="$tunlink"
  48                 if [ -z "$wanif" ] && ! network_find_wan wanif; then
  49                         proto_notify_error "$cfg" "NO_WAN_LINK"
  50                         return
  51                 fi
  52
  53                 if ! network_get_ipaddr ipaddr "$wanif"; then
  54                         proto_notify_error "$cfg" "NO_WAN_LINK"
  55                         return
  56                 fi
  57         }
  58
  59         proto_init_update "$link" 1
  60
  61         [ -n "$ip6addr" ] && {
  62                 local local6="${ip6addr%%/*}"
  63                 local mask6="${ip6addr##*/}"
  64                 [[ "$local6" = "$mask6" ]] && mask6=
  65                 proto_add_ipv6_address "$local6" "$mask6"
  66                 proto_add_ipv6_route "::" 0 "" "" "" "$local6/$mask6"
  67         }
  68
  69         for ip6prefix in $ip6prefixes; do
  70                 proto_add_ipv6_prefix "$ip6prefix"
  71                 proto_add_ipv6_route "::" 0 "" "" "" "$ip6prefix"
  72         done
  73
  74         proto_add_tunnel
  75         json_add_string mode sit
  76         json_add_int mtu "${mtu:-1280}"
  77         json_add_int ttl "${ttl:-64}"
  78         [ -n "$tos" ] && json_add_string tos "$tos"
  79         json_add_string local "$ipaddr"
  80         json_add_string remote "$peeraddr"
  81         [ -n "$tunlink" ] && json_add_string link "$tunlink"
  82         proto_close_tunnel
  83
  84         proto_send_update "$cfg"
  85
  86         [ -n "$tunnelid" -a -n "$username" -a \( -n "$password" -o -n "$updatekey" \) ] && {
  87                 [ -n "$updatekey" ] && password="$updatekey"
  88
  89                 local http="http"
  90                 local urlget="uclient-fetch"
  91                 local urlget_opts="-qO-"
  92                 local ca_path="${SSL_CERT_DIR:-/etc/ssl/certs}"
  93
  94                 [ -f /lib/libustream-ssl.so ] && http=https
  95                 [ "$http" = "https" -a -z "$(find $ca_path -name "*.0" 2>/dev/null)" ] && {
  96                         urlget_opts="$urlget_opts --no-check-certificate"
  97                 }
  98
  99                 local url="$http://ipv4.tunnelbroker.net/nic/update?hostname=$tunnelid"
 100                 local try=0
 101                 local max=3
 102
 103                 (
 104                         set -o pipefail
 105                         while [ $((++try)) -le $max ]; do
 106                                 if proto_6in4_update $urlget $urlget_opts --user="$username" --password="$password" "$url" 2>&1 | \
 107                                         sed -e 's,^Killed$,timeout,' -e "s,^,update $try/$max: ," | \
 108                                         logger -t "$link";
 109                                 then
 110                                         logger -t "$link" "updated"
 111                                         return 0
 112                                 fi
 113                                 sleep 5
 114                         done
 115                         logger -t "$link" "update failed"
 116                 )
 117         }
 118 }
 119
 120 proto_6in4_teardown() {
 121         local cfg="$1"
 122 }
 123
 124 proto_6in4_init_config() {
 125         no_device=1
 126         available=1
 127
 128         proto_config_add_string "ipaddr"
 129         proto_config_add_string "ip6addr"
 130         proto_config_add_array "ip6prefix"
 131         proto_config_add_string "peeraddr"
 132         proto_config_add_string "tunlink"
 133         proto_config_add_string "tunnelid"
 134         proto_config_add_string "username"
 135         proto_config_add_string "password"
 136         proto_config_add_string "updatekey"
 137         proto_config_add_int "mtu"
 138         proto_config_add_int "ttl"
 139         proto_config_add_string "tos"
 140 }
 141
 142 [ -n "$INCLUDE_ONLY" ] || {
 143         add_protocol 6in4
 144 }