*: Add infrastructure to support zapi interface callbacks

Start the conversion to allow zapi interface callbacks to be
controlled like vrf creation/destruction/change callbacks.

This will allow us to consolidate control into the interface.c
instead of having each daemon read the stream and react accordingly.
This will hopefully reduce a bunch of cut-n-paste stuff

Create 4 new callback functions that will be controlled by
lib/if.c

create -> A upper level protocol receives an interface creation event
The ifp is brand spanking newly created in the system.
up -> A upper level protocol receives a interface up event
This means the interface is up and ready to go.
down -> A upper level protocol receives a interface down
destroy -> A upper level protocol receives a destroy event
This means to delete the pointers associated with it.

At this point this is just boilerplate setup for future commits.
There is no new functionality.

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/staticd/static_zebra.c b/staticd/static_zebra.c
index 1965c2968e..c18cbed6ba 100644
--- a/staticd/static_zebra.c
+++ b/staticd/static_zebra.c
@@ -504,10 +504,34 @@ extern void static_zebra_route_add(struct route_node *rn,
 			   ZEBRA_ROUTE_ADD : ZEBRA_ROUTE_DELETE,
 			   zclient, &api);
 }
+
+static int static_ifp_create(struct interface *ifp)
+{
+	return 0;
+}
+
+static int static_ifp_up(struct interface *ifp)
+{
+	return 0;
+}
+
+static int static_ifp_down(struct interface *ifp)
+{
+	return 0;
+}
+
+static int static_ifp_destroy(struct interface *ifp)
+{
+	return 0;
+}
+
 void static_zebra_init(void)
 {
 	struct zclient_options opt = { .receive_notify = true };
 
+	if_zapi_callbacks(static_ifp_create, static_ifp_up,
+			  static_ifp_down, static_ifp_destroy);
+
 	zclient = zclient_new(master, &opt);
 
 	zclient_init(zclient, ZEBRA_ROUTE_STATIC, 0, &static_privs);