openwrt/package/network/config/xfrm/files/xfrm.sh
Philip Prindeville 5d2b577a53 xfrm: support 'multicast' attribute on interfaces
You shouldn't need the overhead of GRE just to add multicast
capability on a point-to-point interface (for instance, you might
want to run mDNS over IPsec transport connections, and Avahi
requires IFF_MULTICAST be set on interfaces, even point-to-point
ones).

Borrowed heavily from:

    b3c9321b9e gre: Support multicast configurable gre interfaces

Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
2020-12-11 20:53:36 +01:00

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#!/bin/sh
[ -n "$INCLUDE_ONLY" ] || {
. /lib/functions.sh
. /lib/functions/network.sh
. ../netifd-proto.sh
init_proto "$@"
}
proto_xfrm_setup() {
local cfg="$1"
local mode="xfrm"
local tunlink ifid mtu zone multicast
json_get_vars tunlink ifid mtu zone multicast
[ -z "$tunlink" ] && {
proto_notify_error "$cfg" NO_TUNLINK
proto_block_restart "$cfg"
exit
}
[ -z "$ifid" ] && {
proto_notify_error "$cfg" NO_IFID
proto_block_restart "$cfg"
exit
}
( proto_add_host_dependency "$cfg" '' "$tunlink" )
proto_init_update "$cfg" 1
proto_add_tunnel
json_add_string mode "$mode"
json_add_int mtu "${mtu:-1280}"
json_add_string link "$tunlink"
json_add_boolean multicast "${multicast:-1}"
json_add_object 'data'
[ -n "$ifid" ] && json_add_int ifid "$ifid"
json_close_object
proto_close_tunnel
proto_add_data
[ -n "$zone" ] && json_add_string zone "$zone"
proto_close_data
proto_send_update "$cfg"
}
proto_xfrm_teardown() {
local cfg="$1"
}
proto_xfrm_init_config() {
no_device=1
available=1
proto_config_add_int "mtu"
proto_config_add_string "tunlink"
proto_config_add_string "zone"
proto_config_add_int "ifid"
proto_config_add_boolean "multicast"
}
[ -n "$INCLUDE_ONLY" ] || {
[ -f /lib/modules/$(uname -r)/xfrm_interface.ko -o -d /sys/module/xfrm_interface ] && add_protocol xfrm
}