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=$ealen"
  48                 if [ "$type" = "map-t" ]; then
  49                         rule="$rule,dmr=$peeraddr"
  50                 else
  51                         rule="$rule,br=$peeraddr"
  52                 fi
  53         fi
  54
  55         RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
  56         if [ "$?" != 0 ]; then
  57                 proto_notify_error "$cfg" "INVALID_MAP_RULE"
  58                 proto_block_restart "$cfg"
  59                 return
  60         fi
  61
  62         eval $RULE_DATA
  63
  64         if [ -z "$RULE_BMR" ]; then
  65                 proto_notify_error "$cfg" "NO_MATCHING_PD"
  66                 proto_block_restart "$cfg"
  67                 return
  68         fi
  69
  70         k=$RULE_BMR
  71         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
  72                 proto_init_update "$link" 1
  73                 proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
  74
  75                 proto_add_tunnel
  76                 json_add_string mode ipip6
  77                 json_add_int mtu "${mtu:-1280}"
  78                 json_add_int ttl "${ttl:-64}"
  79                 json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
  80                 json_add_string remote $(eval "echo \$RULE_${k}_BR")
  81                 json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
  82
  83                 if [ "$type" = "map-e" ]; then
  84                         json_add_array "fmrs"
  85                                 for i in $(seq $RULE_COUNT); do
  86                                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
  87                                         fmr="$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
  88                                         fmr="$fmr,$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
  89                                         fmr="$fmr,$(eval "echo \$RULE_${i}_EALEN"),$(eval "echo \$RULE_${i}_OFFSET")"
  90                                         json_add_string "" "$fmr"
  91                                 done
  92                         json_close_array
  93                 fi
  94
  95                 proto_close_tunnel
  96         elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
  97                 proto_init_update "$link" 1
  98                 local style="MAP"
  99                 [ "$LEGACY" = 1 ] && style="MAP0"
 100
 101                 echo add $link > /proc/net/nat46/control
 102                 local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")"
 103                 cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")"
 104                 cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")"
 105                 cfgstr="$cfgstr remote.v4 0.0.0.0/0 remote.v6 $(eval "echo \$RULE_${k}_DMR") remote.style RFC6052 remote.ea-len 0 remote.psid-offset 0"
 106                 echo config $link $cfgstr > /proc/net/nat46/control
 107
 108                 for i in $(seq $RULE_COUNT); do
 109                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
 110                         local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
 111                         cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
 112                         cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")"
 113                         echo insert $link $cfgstr > /proc/net/nat46/control
 114                 done
 115         else
 116                 proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
 117                 proto_block_restart "$cfg"
 118         fi
 119
 120         proto_add_ipv4_route "0.0.0.0" 0
 121         proto_add_data
 122         [ "$zone" != "-" ] && json_add_string zone "$zone"
 123
 124         json_add_array firewall
 125           if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then
 126             json_add_object ""
 127               json_add_string type nat
 128               json_add_string target SNAT
 129               json_add_string family inet
 130               json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 131             json_close_object
 132           else
 133             for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
 134               for proto in icmp tcp udp; do
 135                 json_add_object ""
 136                   json_add_string type nat
 137                   json_add_string target SNAT
 138                   json_add_string family inet
 139                   json_add_string proto "$proto"
 140                   json_add_boolean connlimit_ports 1
 141                   json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 142                   json_add_string snat_port "$portset"
 143                 json_close_object
 144               done
 145             done
 146           fi
 147           if [ "$type" = "map-t" ]; then
 148                 json_add_object ""
 149                         json_add_string type rule
 150                         json_add_string family inet6
 151                         json_add_string proto all
 152                         json_add_string direction in
 153                         json_add_string dest "$zone"
 154                         json_add_string src "$zone"
 155                         json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
 156                         json_add_string target ACCEPT
 157                 json_close_object
 158                 json_add_object ""
 159                         json_add_string type rule
 160                         json_add_string family inet6
 161                         json_add_string proto all
 162                         json_add_string direction out
 163                         json_add_string dest "$zone"
 164                         json_add_string src "$zone"
 165                         json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
 166                         json_add_string target ACCEPT
 167                 json_close_object
 168                 proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128
 169           fi
 170         json_close_array
 171         proto_close_data
 172
 173         proto_send_update "$cfg"
 174
 175         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
 176                 json_init
 177                 json_add_string name "${cfg}_local"
 178                 json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
 179                 json_add_string proto "static"
 180                 json_add_array ip6addr
 181                 json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
 182                 json_close_array
 183                 json_close_object
 184                 ubus call network add_dynamic "$(json_dump)"
 185         fi
 186 }
 187
 188 proto_map_teardown() {
 189         local cfg="$1"
 190         ifdown "${cfg}_local"
 191 }
 192
 193 proto_map_init_config() {
 194         no_device=1
 195         available=1
 196
 197         proto_config_add_string "rule"
 198         proto_config_add_string "ipaddr"
 199         proto_config_add_int "ip4prefixlen"
 200         proto_config_add_string "ip6prefix"
 201         proto_config_add_int "ip6prefixlen"
 202         proto_config_add_string "peeraddr"
 203         proto_config_add_int "psidlen"
 204         proto_config_add_int "psid"
 205         proto_config_add_int "offset"
 206
 207         proto_config_add_string "tunlink"
 208         proto_config_add_int "mtu"
 209         proto_config_add_int "ttl"
 210         proto_config_add_string "zone"
 211 }
 212
 213 [ -n "$INCLUDE_ONLY" ] || {
 214         add_protocol map
 215 }