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 encaplimit
  32         local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset
  33         json_get_vars type mtu ttl tunlink zone encaplimit
  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" "::" "$tunlink" )
  41
  42         # fixme: handle RA/DHCPv6 address race for LW
  43         [ "$type" = lw4o6 ] && sleep 5
  44
  45         if [ -z "$rule" ]; then
  46                 rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen"
  47                 [ -n "$psid" ] && rule="$rule,psid=$psid"
  48                 [ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen"
  49                 [ -n "$offset" ] && rule="$rule,offset=$offset"
  50                 [ -n "$ealen" ] && rule="$rule,ealen=$ealen"
  51                 if [ "$type" = "map-t" ]; then
  52                         rule="$rule,dmr=$peeraddr"
  53                 else
  54                         rule="$rule,br=$peeraddr"
  55                 fi
  56         fi
  57
  58         echo "rule=$rule" > /tmp/map-$cfg.rules
  59         RULE_DATA=$(mapcalc ${tunlink:-\*} $rule)
  60         if [ "$?" != 0 ]; then
  61                 proto_notify_error "$cfg" "INVALID_MAP_RULE"
  62                 proto_block_restart "$cfg"
  63                 return
  64         fi
  65
  66         echo "$RULE_DATA" >> /tmp/map-$cfg.rules
  67         eval $RULE_DATA
  68
  69         if [ -z "$RULE_BMR" ]; then
  70                 proto_notify_error "$cfg" "NO_MATCHING_PD"
  71                 proto_block_restart "$cfg"
  72                 return
  73         fi
  74
  75         k=$RULE_BMR
  76         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
  77                 proto_init_update "$link" 1
  78                 proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" ""
  79
  80                 proto_add_tunnel
  81                 json_add_string mode ipip6
  82                 json_add_int mtu "${mtu:-1280}"
  83                 json_add_int ttl "${ttl:-64}"
  84                 json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR")
  85                 json_add_string remote $(eval "echo \$RULE_${k}_BR")
  86                 json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE")
  87                 json_add_object "data"
  88                         json_add_string encaplimit "${encaplimit:-4}"
  89                         if [ "$type" = "map-e" ]; then
  90                                 json_add_array "fmrs"
  91                                 for i in $(seq $RULE_COUNT); do
  92                                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
  93                                         json_add_object ""
  94                                         json_add_string prefix6 "$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
  95                                         json_add_string prefix4 "$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
  96                                         json_add_int ealen $(eval "echo \$RULE_${i}_EALEN")
  97                                         json_add_int offset $(eval "echo \$RULE_${i}_OFFSET")
  98                                         json_close_object
  99                                 done
 100                                 json_close_array
 101                         fi
 102                 json_close_object
 103
 104
 105                 proto_close_tunnel
 106         elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
 107                 proto_init_update "$link" 1
 108                 local style="MAP"
 109                 [ "$LEGACY" = 1 ] && style="MAP0"
 110
 111                 echo add $link > /proc/net/nat46/control
 112                 local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")"
 113                 cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")"
 114                 cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")"
 115                 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"
 116                 echo config $link $cfgstr > /proc/net/nat46/control
 117
 118                 for i in $(seq $RULE_COUNT); do
 119                         [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
 120                         local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")"
 121                         cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")"
 122                         cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")"
 123                         echo insert $link $cfgstr > /proc/net/nat46/control
 124                 done
 125         else
 126                 proto_notify_error "$cfg" "UNSUPPORTED_TYPE"
 127                 proto_block_restart "$cfg"
 128         fi
 129
 130         proto_add_ipv4_route "0.0.0.0" 0
 131         proto_add_data
 132         [ "$zone" != "-" ] && json_add_string zone "$zone"
 133
 134         json_add_array firewall
 135           if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then
 136             json_add_object ""
 137               json_add_string type nat
 138               json_add_string target SNAT
 139               json_add_string family inet
 140               json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 141             json_close_object
 142           else
 143             for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do
 144               for proto in icmp tcp udp; do
 145                 json_add_object ""
 146                   json_add_string type nat
 147                   json_add_string target SNAT
 148                   json_add_string family inet
 149                   json_add_string proto "$proto"
 150                   json_add_boolean connlimit_ports 1
 151                   json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR")
 152                   json_add_string snat_port "$portset"
 153                 json_close_object
 154               done
 155             done
 156           fi
 157           if [ "$type" = "map-t" ]; then
 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 in
 163                         json_add_string dest "$zone"
 164                         json_add_string src "$zone"
 165                         json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
 166                         json_add_string target ACCEPT
 167                 json_close_object
 168                 json_add_object ""
 169                         json_add_string type rule
 170                         json_add_string family inet6
 171                         json_add_string proto all
 172                         json_add_string direction out
 173                         json_add_string dest "$zone"
 174                         json_add_string src "$zone"
 175                         json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR")
 176                         json_add_string target ACCEPT
 177                 json_close_object
 178                 proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128
 179           fi
 180         json_close_array
 181         proto_close_data
 182
 183         proto_send_update "$cfg"
 184
 185         if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then
 186                 json_init
 187                 json_add_string name "${cfg}_"
 188                 json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")"
 189                 json_add_string proto "static"
 190                 json_add_array ip6addr
 191                 json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")"
 192                 json_close_array
 193                 json_close_object
 194                 ubus call network add_dynamic "$(json_dump)"
 195         fi
 196 }
 197
 198 proto_map_teardown() {
 199         local cfg="$1"
 200         local link="map-$cfg"
 201
 202         json_get_var type type
 203
 204         [ -z "$type" ] && type="map-e"
 205
 206         case "$type" in
 207                 "map-e"|"lw4o6") ifdown "${cfg}_" ;;
 208                 "map-t") [ -f "/proc/net/nat46/control" ] && echo del $link > /proc/net/nat46/control ;;
 209         esac
 210
 211         rm -f /tmp/map-$cfg.rules
 212 }
 213
 214 proto_map_init_config() {
 215         no_device=1
 216         available=1
 217
 218         proto_config_add_string "rule"
 219         proto_config_add_string "ipaddr"
 220         proto_config_add_int "ip4prefixlen"
 221         proto_config_add_string "ip6prefix"
 222         proto_config_add_int "ip6prefixlen"
 223         proto_config_add_string "peeraddr"
 224         proto_config_add_int "ealen"
 225         proto_config_add_int "psidlen"
 226         proto_config_add_int "psid"
 227         proto_config_add_int "offset"
 228
 229         proto_config_add_string "tunlink"
 230         proto_config_add_int "mtu"
 231         proto_config_add_int "ttl"
 232         proto_config_add_string "zone"
 233         proto_config_add_string "encaplimit"
 234 }
 235
 236 [ -n "$INCLUDE_ONLY" ] || {
 237         add_protocol map
 238 }