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