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