package/network/ipv6/map/files/map.sh

   1 #!/bin/sh
   2 # map.sh - IPv4-in-IPv6 tunnel backend
   3 #
   4 # Author: Steven Barth <cyrus@openwrt.org>
   5 # Copyright (c) 2014 cisco Systems, Inc.
   6 #
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License version 2
   9 # as published by the Free Software Foundation
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15
  16 [ -n "$INCLUDE_ONLY" ] || {
  17         . /lib/functions.sh
  18         . /lib/functions/network.sh
  19         . ../netifd-proto.sh
  20         init_proto "$@"
  21 }
  22
  23 proto_map_setup() {
  24         local cfg="$1"
  25         local iface="$2"
  26         local link="map-$cfg"
  27
  28         # uncomment for legacy MAP0 mode
  29         #export LEGACY=1
  30
  31         local type mtu ttl tunlink zone
  32         local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  33         json_get_vars type mtu ttl tunlink zone
  34         json_get_vars rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  35
  36         [ -z "$zone" ] && zone="wan"
  37         [ -z "$type" ] && type="map-e"
  38         [ -z "$ip4prefixlen" ] && ip4prefixlen=32
  39
  40         ( proto_add_host_dependency "$cfg" "::" "$tunlink" )
  41
  42         if [ -z "$rule" ]; then
  43                 rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen"
  44                 [ -n "$psid" ] && rule="$rule,psid=$psid"
  45                 [ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen"
  46                 [ -n "$offset" ] && rule="$rule,offset=$offset"
  47                 [ -n "$ealen" ] && rule="$rule,ealen=$ealen"
  48                 rule="$rule,br=$peeraddr"
  49         fi
  50
  51         RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
  52         if [ "$?" != 0 ]; then
  53                 proto_notify_error "$cfg" "INVALID_MAP_RULE"
  54                 proto_block_restart "$cfg"
  55                 return
  56         fi
  57
  58         eval $RULE_DATA
  59
  60         if [ -z "$RULE_BMR" ]; then
  61                 proto_notify_error "$cfg" "NO_MATCHING_PD"
  62                 proto_block_restart "$cfg"
  63                 return
  64         fi
  65
  66         k=$RULE_BMR
  67         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
  68                 proto_init_update "$link" 1
  69                 proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
  70
  71                 proto_add_tunnel
  72                 json_add_string mode ipip6
  73                 json_add_int mtu "${mtu:-1280}"
  74                 json_add_int ttl "${ttl:-64}"
  75                 json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
  76                 json_add_string remote $(eval "echo \$RULE_${k}_BR")
  77                 json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
  78
  79                 if [ "$type" = "map-e" ]; then
  80                         json_add_array "fmrs"
  81                                 for i in $(seq $RULE_COUNT); do
  82                                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
  83                                         fmr="$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
  84                                         fmr="$fmr,$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
  85                                         fmr="$fmr,$(eval "echo \$RULE_${i}_EALEN"),$(eval "echo \$RULE_${i}_OFFSET")"
  86                                         json_add_string "" "$fmr"
  87                                 done
  88                         json_close_array
  89                 fi
  90
  91                 proto_close_tunnel
  92         else
  93                 proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
  94                 proto_block_restart "$cfg"
  95         fi
  96
  97         proto_add_ipv4_route "0.0.0.0" 0
  98         proto_add_data
  99         [ "$zone" != "-" ] && json_add_string zone "$zone"
 100
 101         json_add_array firewall
 102           for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
 103             for proto in icmp tcp udp; do
 104               json_add_object ""
 105                 json_add_string type nat
 106                 json_add_string target SNAT
 107                 json_add_string family inet
 108                 json_add_string proto "$proto"
 109                 json_add_boolean connlimit_ports 1
 110                 json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 111                 json_add_string snat_port "$portset"
 112               json_close_object
 113             done
 114           done
 115         json_close_array
 116         proto_close_data
 117
 118         proto_send_update "$cfg"
 119
 120         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
 121                 json_init
 122                 json_add_string name "${cfg}_local"
 123                 json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
 124                 json_add_string proto "static"
 125                 json_add_array ip6addr
 126                 json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
 127                 json_close_array
 128                 json_close_object
 129                 ubus call network add_dynamic "$(json_dump)"
 130         fi
 131 }
 132
 133 proto_map_teardown() {
 134         local cfg="$1"
 135         ifdown "${cfg}_local"
 136 }
 137
 138 proto_map_init_config() {
 139         no_device=1
 140         available=1
 141
 142         proto_config_add_string "rule"
 143         proto_config_add_string "ipaddr"
 144         proto_config_add_int "ip4prefixlen"
 145         proto_config_add_string "ip6prefix"
 146         proto_config_add_int "ip6prefixlen"
 147         proto_config_add_string "peeraddr"
 148         proto_config_add_int "psidlen"
 149         proto_config_add_int "psid"
 150         proto_config_add_int "offset"
 151
 152         proto_config_add_string "tunlink"
 153         proto_config_add_int "mtu"
 154         proto_config_add_int "ttl"
 155         proto_config_add_string "zone"
 156 }
 157
 158 [ -n "$INCLUDE_ONLY" ] || {
 159         add_protocol map
 160 }