interface: support "zone" config option

Many protocol handlers support "zone" option independently and they pass
it in the "data". Then it's read e.g. by a firewall[34].

Add support for "zone" directly to the netifd so:
1. It works for all protocols
2. Handlers don't have to duplicate code

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

1 files changed, 3 insertions, 0 deletions

diff --git a/ubus.c b/ubus.c
index 2876e7d..7f4821d 100644
--- a/ubus.c
+++ b/ubus.c
@@ -918,6 +918,9 @@ netifd_dump_status(struct interface *iface)
 	}
 
 	a = blobmsg_open_table(&b, "data");
+
+	if (iface->zone)
+		blobmsg_add_string(&b, "zone", iface->zone);
 	avl_for_each_element(&iface->data, data, node)
 		blobmsg_add_blob(&b, data->data);