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openwrt/package/network/ipv6/map/files/map.sh
Hans Dedecker 6f50d5ccf3 map: drop default encaplimit value 
Setting encaplimit to a numerical value results into the value being
included as tunnel encapsulation limit in the destination option header
for tunneled packets.
Several users have reported interop issues as not all ISPs support the
destination option header containing the tunnel encapsulation limit
resulting into broken map connectivity.
Therefore drop the default encaplimit value for map tunnels so
no destination option header is included by default.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
(backported from d9691b66e2)
2018-12-18 11:28:13 +01:00

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#!/bin/sh
# map.sh - IPv4-in-IPv6 tunnel backend
#
# Author: Steven Barth <cyrus@openwrt.org>
# 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
}
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