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map: make tunnel encapsulation limit support configurable (FS#1501)

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Be compatible with ISPs which don't support the destination option header containing
the tunnel encapsulation limit as reported in FS#1501.
Setting the uci parameter encaplimit to ignore; allows to disable the insertion
of the destination option header in the map-e packets.
Otherwise the tunnel encapsulation limit value can be set to a value from 0 till 255
by setting the encaplimit uci parameter accordingly.
If no encaplimit value is specified the default value is 4 as before.

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
This commit is contained in:
Hans Dedecker 2018-06-04 17:00:32 +02:00
parent 082cd951bb
commit e4577d2e68
2 changed files with 10 additions and 8 deletions
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2
package/network/ipv6/map/Makefile
View file

@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
PKG_NAME:=map
PKG_VERSION:=4
PKG_RELEASE:=10
PKG_RELEASE:=11
PKG_LICENSE:=GPL-2.0
include $(INCLUDE_DIR)/package.mk

12
package/network/ipv6/map/files/map.sh
View file

@ -28,9 +28,9 @@ proto_map_setup() {
# uncomment for legacy MAP0 mode
#export LEGACY=1
local type mtu ttl tunlink zone
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
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"
@ -84,9 +84,9 @@ proto_map_setup() {
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")
if [ "$type" = "map-e" ]; then
json_add_object "data"
json_add_string encaplimit "${encaplimit:-4}"
if [ "$type" = "map-e" ]; then
json_add_array "fmrs"
for i in $(seq $RULE_COUNT); do
[ "$(eval "echo \$RULE_${i}_FMR")" != 1 ] && continue
@ -98,8 +98,9 @@ proto_map_setup() {
json_close_object
done
json_close_array
json_close_object
fi
json_close_object
proto_close_tunnel
elif [ "$type" = "map-t" -a -f "/proc/net/nat46/control" ]; then
@ -229,6 +230,7 @@ proto_map_init_config() {
proto_config_add_int "mtu"
proto_config_add_int "ttl"
proto_config_add_string "zone"
proto_config_add_string "encaplimit"
}
[ -n "$INCLUDE_ONLY" ] || {