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                 local 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 tunnelid username password updatekey
  31         json_get_vars mtu ttl tos ipaddr peeraddr ip6addr ip6prefix 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" "$peeraddr" )
  40
  41         [ -z "$ipaddr" ] && {
  42                 local wanif
  43                 if ! network_find_wan wanif || ! network_get_ipaddr ipaddr "$wanif"; then
  44                         proto_notify_error "$cfg" "NO_WAN_LINK"
  45                         return
  46                 fi
  47         }
  48
  49         proto_init_update "$link" 1
  50
  51         [ -n "$ip6addr" ] && {
  52                 local local6="${ip6addr%%/*}"
  53                 local mask6="${ip6addr##*/}"
  54                 [[ "$local6" = "$mask6" ]] && mask6=
  55                 proto_add_ipv6_address "$local6" "$mask6"
  56                 proto_add_ipv6_route "::" 0 "" "" "" "$local6/$mask6"
  57         }
  58
  59         [ -n "$ip6prefix" ] && {
  60                 proto_add_ipv6_prefix "$ip6prefix"
  61                 proto_add_ipv6_route "::" 0 "" "" "" "$ip6prefix"
  62         }
  63
  64         proto_add_tunnel
  65         json_add_string mode sit
  66         json_add_int mtu "${mtu:-1280}"
  67         json_add_int ttl "${ttl:-64}"
  68         [ -n "$tos" ] && json_add_string tos "$tos"
  69         json_add_string local "$ipaddr"
  70         json_add_string remote "$peeraddr"
  71         proto_close_tunnel
  72
  73         proto_send_update "$cfg"
  74
  75         [ -n "$tunnelid" -a -n "$username" -a \( -n "$password" -o -n "$updatekey" \) ] && {
  76                 [ -n "$updatekey" ] && password="$updatekey"
  77
  78                 local http="http"
  79                 local urlget="wget"
  80                 local urlget_opts="-qO-"
  81                 local ca_path="${SSL_CERT_DIR-/etc/ssl/certs}"
  82
  83                 if [ -n "$(which curl)" ]; then
  84                         urlget="curl"
  85                         urlget_opts="-s -S"
  86                         if curl -V | grep "Protocols:" | grep -qF "https"; then
  87                                 http="https"
  88                                 urlget_opts="$urlget_opts --capath $ca_path"
  89                         fi
  90                 fi
  91                 if [ "$http" = "http" ] &&
  92                         wget --version 2>&1 | grep -qF "+https"; then
  93                         urlget="wget"
  94                         urlget_opts="-qO- --ca-directory=$ca_path"
  95                         http="https"
  96                 fi
  97                 [ "$http" = "https" -a -z "$(find $ca_path -name "*.0" 2>/dev/null)" ] && {
  98                         if [ "$urlget" = "curl" ]; then
  99                                 urlget_opts="$urlget_opts -k"
 100                         else
 101                                 urlget_opts="$urlget_opts --no-check-certificate"
 102                         fi
 103                 }
 104
 105                 local url="$http://ipv4.tunnelbroker.net/nic/update?username=$username&password=$password&hostname=$tunnelid"
 106                 local try=0
 107                 local max=3
 108
 109                 (
 110                         set -o pipefail
 111                         while [ $((++try)) -le $max ]; do
 112                                 if proto_6in4_update $urlget $urlget_opts "$url" 2>&1 | \
 113                                         sed -e 's,^Killed$,timeout,' -e "s,^,update $try/$max: ," | \
 114                                         logger -t "$link";
 115                                 then
 116                                         logger -t "$link" "updated"
 117                                         return 0
 118                                 fi
 119                                 sleep 5
 120                         done
 121                         logger -t "$link" "update failed"
 122                 )
 123         }
 124 }
 125
 126 proto_6in4_teardown() {
 127         local cfg="$1"
 128 }
 129
 130 proto_6in4_init_config() {
 131         no_device=1
 132         available=1
 133
 134         proto_config_add_string "ipaddr"
 135         proto_config_add_string "ip6addr"
 136         proto_config_add_string "ip6prefix"
 137         proto_config_add_string "peeraddr"
 138         proto_config_add_string "tunnelid"
 139         proto_config_add_string "username"
 140         proto_config_add_string "password"
 141         proto_config_add_string "updatekey"
 142         proto_config_add_int "mtu"
 143         proto_config_add_int "ttl"
 144         proto_config_add_string "tos"
 145 }
 146
 147 [ -n "$INCLUDE_ONLY" ] || {
 148         add_protocol 6in4
 149 }