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#!/bin/sh
# 464xlat.sh - 464xlat CLAT
#
# Copyright (c) 2015 Steven Barth <cyrus@openwrt.org>
#
# 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_464xlat_setup() {
local cfg="$1"
local iface="$2"
local link="464-$cfg"
local ip6addr ip6prefix tunlink zone
json_get_vars ip6addr ip6prefix tunlink zone
[ -z "$zone" ] && zone="wan"
( proto_add_host_dependency "$cfg" "::" "$tunlink" )
if [ -z "$tunlink" ] && ! network_find_wan6 tunlink; then
proto_notify_error "$cfg" "NO_WAN_LINK"
return
fi
network_get_device tundev "$tunlink"
ip6addr=$(464xlatcfg "$link" "$tundev" "$ip6prefix" 192.0.0.1 $ip6addr)
if [ -z "$ip6addr" ]; then
proto_notify_error "$cfg" "CLAT_CONFIG_FAILED"
return
fi
ip -6 rule del from all lookup local
ip -6 rule add from all lookup local pref 1
ip -6 rule add to $ip6addr lookup prelocal pref 0
echo "$ip6addr" > /tmp/464-$cfg-anycast
proto_init_update "$link" 1
proto_add_ipv4_route "0.0.0.0" 0 "" "" 2048
proto_add_ipv6_route $ip6addr 128 "" "" "" "" 128
proto_add_data
[ "$zone" != "-" ] && json_add_string zone "$zone"
json_add_array firewall
json_add_object ""
json_add_string type nat
json_add_string target SNAT
json_add_string family inet
json_add_string snat_ip 192.0.0.1
json_close_object
json_add_object ""
json_add_string type rule
json_add_string family inet6
json_add_string proto all
json_add_string direction in
json_add_string dest "$zone"
json_add_string src "$zone"
json_add_string src_ip $ip6addr
json_add_string target ACCEPT
json_close_object
json_close_array
proto_close_data
proto_send_update "$cfg"
}
proto_464xlat_teardown() {
local cfg="$1"
local link="464-$cfg"
[ -f /tmp/464-$cfg-anycast ] || return
local ip6addr=$(cat /tmp/464-$cfg-anycast)
464xlatcfg "$link"
rm -rf /tmp/464-$cfg-anycast
[ -n "$ip6addr" ] && ip -6 rule del to $ip6addr lookup prelocal
if [ -z "$(ls /tmp/464-*-anycast 2>&-)" ]; then
ip -6 rule del from all lookup local
ip -6 rule add from all lookup local pref 0
fi
}
proto_464xlat_init_config() {
no_device=1
available=1
proto_config_add_string "ip6prefix"
proto_config_add_string "ip6addr"
proto_config_add_string "tunlink"
proto_config_add_string "zone"
}
[ -n "$INCLUDE_ONLY" ] || {
add_protocol 464xlat
}
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