package/network/ipv6/464xlat/files/464xlat.sh

   1 #!/bin/sh
   2 # 464xlat.sh - 464xlat CLAT
   3 #
   4 # Copyright (c) 2015 Steven Barth <cyrus@openwrt.org>
   5 #
   6 # This program is free software; you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License version 2
   8 # as published by the Free Software Foundation
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14
  15 [ -n "$INCLUDE_ONLY" ] || {
  16         . /lib/functions.sh
  17         . /lib/functions/network.sh
  18         . ../netifd-proto.sh
  19         init_proto "$@"
  20 }
  21
  22 proto_464xlat_setup() {
  23         local cfg="$1"
  24         local iface="$2"
  25         local link="464-$cfg"
  26
  27         local ip6addr ip6prefix tunlink zone
  28         json_get_vars ip6addr ip6prefix tunlink zone
  29
  30         [ "$zone" = "-" ] && zone=""
  31
  32         ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
  33
  34         if [ -z "$tunlink" ] && ! network_find_wan6 tunlink; then
  35                 proto_notify_error "$cfg" "NO_WAN_LINK"
  36                 return
  37         fi
  38         network_get_device tundev "$tunlink"
  39
  40         ip6addr=$(464xlatcfg "$link" "$tundev" "$ip6prefix" 192.0.0.1 $ip6addr)
  41         if [ -z "$ip6addr" ]; then
  42                 proto_notify_error "$cfg" "CLAT_CONFIG_FAILED"
  43                 return
  44         fi
  45
  46         ip -6 rule del from all lookup local
  47         ip -6 rule add from all lookup local pref 1
  48         ip -6 rule add to $ip6addr lookup prelocal pref 0
  49         echo "$ip6addr" > /tmp/464-$cfg-anycast
  50
  51         proto_init_update "$link" 1
  52         proto_add_ipv4_route "0.0.0.0" 0 "" "" 2048
  53         proto_add_ipv6_route $ip6addr 128 "" "" "" "" 128
  54
  55         proto_add_data
  56         [ -n "$zone" ] && json_add_string zone "$zone"
  57
  58         json_add_array firewall
  59                 [ -z "$zone" ] && zone=$(fw3 -q network $iface 2>/dev/null)
  60
  61                 json_add_object ""
  62                         json_add_string type nat
  63                         json_add_string target SNAT
  64                         json_add_string family inet
  65                         json_add_string snat_ip 192.0.0.1
  66                 json_close_object
  67                 [ -n "$zone" ] && {
  68                         json_add_object ""
  69                                 json_add_string type rule
  70                                 json_add_string family inet6
  71                                 json_add_string proto all
  72                                 json_add_string direction in
  73                                 json_add_string dest "$zone"
  74                                 json_add_string src "$zone"
  75                                 json_add_string src_ip $ip6addr
  76                                 json_add_string target ACCEPT
  77                         json_close_object
  78                 }
  79         json_close_array
  80         proto_close_data
  81
  82         proto_send_update "$cfg"
  83 }
  84
  85 proto_464xlat_teardown() {
  86         local cfg="$1"
  87         local link="464-$cfg"
  88
  89         [ -f /tmp/464-$cfg-anycast ] || return
  90         local ip6addr=$(cat /tmp/464-$cfg-anycast)
  91
  92         464xlatcfg "$link"
  93
  94         rm -rf /tmp/464-$cfg-anycast
  95         [ -n "$ip6addr" ] && ip -6 rule del to $ip6addr lookup prelocal
  96
  97         if [ -z "$(ls /tmp/464-*-anycast 2>&-)" ]; then
  98                 ip -6 rule del from all lookup local
  99                 ip -6 rule add from all lookup local pref 0
 100         fi
 101
 102         # Kill conntracks SNATed to 192.0.0.1
 103         echo 192.0.0.1 > /proc/net/nf_conntrack
 104 }
 105
 106 proto_464xlat_init_config() {
 107         no_device=1
 108         available=1
 109
 110         proto_config_add_string "ip6prefix"
 111         proto_config_add_string "ip6addr"
 112         proto_config_add_string "tunlink"
 113         proto_config_add_string "zone"
 114 }
 115
 116 [ -n "$INCLUDE_ONLY" ] || {
 117         add_protocol 464xlat
 118 }