#!/bin/sh # map.sh - IPv4-in-IPv6 tunnel backend # # Author: Steven Barth # Copyright (c) 2014 cisco Systems, Inc. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License version 2 # as published by the Free Software Foundation # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. [ -n "$INCLUDE_ONLY" ] || { . /lib/functions.sh . /lib/functions/network.sh . ../netifd-proto.sh init_proto "$@" } proto_map_setup() { local cfg="$1" local iface="$2" local link="map-$cfg" # uncomment for legacy MAP0 mode #export LEGACY=1 local type mtu ttl tunlink zone encaplimit local rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset json_get_vars type mtu ttl tunlink zone encaplimit json_get_vars rule ipaddr ip4prefixlen ip6prefix ip6prefixlen peeraddr ealen psidlen psid offset [ -z "$zone" ] && zone="wan" [ -z "$type" ] && type="map-e" [ -z "$ip4prefixlen" ] && ip4prefixlen=32 ( proto_add_host_dependency "$cfg" "::" "$tunlink" ) # fixme: handle RA/DHCPv6 address race for LW [ "$type" = lw4o6 ] && sleep 5 if [ -z "$rule" ]; then rule="type=$type,ipv6prefix=$ip6prefix,prefix6len=$ip6prefixlen,ipv4prefix=$ipaddr,prefix4len=$ip4prefixlen" [ -n "$psid" ] && rule="$rule,psid=$psid" [ -n "$psidlen" ] && rule="$rule,psidlen=$psidlen" [ -n "$offset" ] && rule="$rule,offset=$offset" [ -n "$ealen" ] && rule="$rule,ealen=$ealen" if [ "$type" = "map-t" ]; then rule="$rule,dmr=$peeraddr" else rule="$rule,br=$peeraddr" fi fi echo "rule=$rule" > /tmp/map-$cfg.rules RULE_DATA=$(mapcalc ${tunlink:-\*} $rule) if [ "$?" != 0 ]; then proto_notify_error "$cfg" "INVALID_MAP_RULE" proto_block_restart "$cfg" return fi echo "$RULE_DATA" >> /tmp/map-$cfg.rules eval $RULE_DATA if [ -z "$RULE_BMR" ]; then proto_notify_error "$cfg" "NO_MATCHING_PD" proto_block_restart "$cfg" return fi k=$RULE_BMR if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then proto_init_update "$link" 1 proto_add_ipv4_address $(eval "echo \$RULE_${k}_IPV4ADDR") "" "" "" proto_add_tunnel json_add_string mode ipip6 json_add_int mtu "${mtu:-1280}" json_add_int ttl "${ttl:-64}" json_add_string local $(eval "echo \$RULE_${k}_IPV6ADDR") json_add_string remote $(eval "echo \$RULE_${k}_BR") json_add_string link $(eval "echo \$RULE_${k}_PD6IFACE") json_add_object "data" [ -n "$encaplimit" ] && json_add_string encaplimit "$encaplimit" if [ "$type" = "map-e" ]; then json_add_array "fmrs" for i in $(seq $RULE_COUNT); do [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue json_add_object "" json_add_string prefix6 "$(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")" json_add_string prefix4 "$(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")" json_add_int ealen $(eval "echo \$RULE_${i}_EALEN") json_add_int offset $(eval "echo \$RULE_${i}_OFFSET") json_close_object done json_close_array fi json_close_object proto_close_tunnel elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then proto_init_update "$link" 1 local style="MAP" [ "$LEGACY" = 1 ] && style="MAP0" echo add $link > /proc/net/nat46/control local cfgstr="local.style $style local.v4 $(eval "echo \$RULE_${k}_IPV4PREFIX")/$(eval "echo \$RULE_${k}_PREFIX4LEN")" cfgstr="$cfgstr local.v6 $(eval "echo \$RULE_${k}_IPV6PREFIX")/$(eval "echo \$RULE_${k}_PREFIX6LEN")" cfgstr="$cfgstr local.ea-len $(eval "echo \$RULE_${k}_EALEN") local.psid-offset $(eval "echo \$RULE_${k}_OFFSET")" 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" echo config $link $cfgstr > /proc/net/nat46/control for i in $(seq $RULE_COUNT); do [ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue local cfgstr="remote.style $style remote.v4 $(eval "echo \$RULE_${i}_IPV4PREFIX")/$(eval "echo \$RULE_${i}_PREFIX4LEN")" cfgstr="$cfgstr remote.v6 $(eval "echo \$RULE_${i}_IPV6PREFIX")/$(eval "echo \$RULE_${i}_PREFIX6LEN")" cfgstr="$cfgstr remote.ea-len $(eval "echo \$RULE_${i}_EALEN") remote.psid-offset $(eval "echo \$RULE_${i}_OFFSET")" echo insert $link $cfgstr > /proc/net/nat46/control done else proto_notify_error "$cfg" "UNSUPPORTED_TYPE" proto_block_restart "$cfg" fi proto_add_ipv4_route "0.0.0.0" 0 proto_add_data [ "$zone" != "-" ] && json_add_string zone "$zone" json_add_array firewall if [ -z "$(eval "echo \$RULE_${k}_PORTSETS")" ]; then json_add_object "" json_add_string type nat json_add_string target SNAT json_add_string family inet json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR") json_close_object else for portset in $(eval "echo \$RULE_${k}_PORTSETS"); do for proto in icmp tcp udp; do json_add_object "" json_add_string type nat json_add_string target SNAT json_add_string family inet json_add_string proto "$proto" json_add_boolean connlimit_ports 1 json_add_string snat_ip $(eval "echo \$RULE_${k}_IPV4ADDR") json_add_string snat_port "$portset" json_close_object done done fi if [ "$type" = "map-t" ]; then json_add_object "" json_add_string type rule json_add_string family inet6 json_add_string proto all json_add_string direction in json_add_string dest "$zone" json_add_string src "$zone" json_add_string src_ip $(eval "echo \$RULE_${k}_IPV6ADDR") json_add_string target ACCEPT json_close_object json_add_object "" json_add_string type rule json_add_string family inet6 json_add_string proto all json_add_string direction out json_add_string dest "$zone" json_add_string src "$zone" json_add_string dest_ip $(eval "echo \$RULE_${k}_IPV6ADDR") json_add_string target ACCEPT json_close_object proto_add_ipv6_route $(eval "echo \$RULE_${k}_IPV6ADDR") 128 fi json_close_array proto_close_data proto_send_update "$cfg" if [ "$type" = "lw4o6" -o "$type" = "map-e" ]; then json_init json_add_string name "${cfg}_" json_add_string ifname "@$(eval "echo \$RULE_${k}_PD6IFACE")" json_add_string proto "static" json_add_array ip6addr json_add_string "" "$(eval "echo \$RULE_${k}_IPV6ADDR")" json_close_array json_close_object ubus call network add_dynamic "$(json_dump)" fi } proto_map_teardown() { local cfg="$1" local link="map-$cfg" json_get_var type type [ -z "$type" ] && type="map-e" case "$type" in "map-e"|"lw4o6") ifdown "${cfg}_" ;; "map-t") [ -f "/proc/net/nat46/control" ] && echo del $link > /proc/net/nat46/control ;; esac rm -f /tmp/map-$cfg.rules } proto_map_init_config() { no_device=1 available=1 proto_config_add_string "rule" proto_config_add_string "ipaddr" proto_config_add_int "ip4prefixlen" proto_config_add_string "ip6prefix" proto_config_add_int "ip6prefixlen" proto_config_add_string "peeraddr" proto_config_add_int "ealen" proto_config_add_int "psidlen" proto_config_add_int "psid" proto_config_add_int "offset" proto_config_add_string "tunlink" proto_config_add_int "mtu" proto_config_add_int "ttl" proto_config_add_string "zone" proto_config_add_string "encaplimit" } [ -n "$INCLUDE_ONLY" ] || { add_protocol map }