*: 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>

2 files changed, 22 insertions, 1 deletions

diff --git a/eigrpd/eigrp_interface.c b/eigrpd/eigrp_interface.c
index fd1d3f5cb9..76e101b010 100644
--- a/eigrpd/eigrp_interface.c
+++ b/eigrpd/eigrp_interface.c
@@ -122,10 +122,32 @@ int eigrp_if_delete_hook(struct interface *ifp)
 	return 0;
 }
 
+static int eigrp_ifp_create(struct interface *ifp)
+{
+	return 0;
+}
+
+static int eigrp_ifp_up(struct interface *ifp)
+{
+	return 0;
+}
+
+static int eigrp_ifp_down(struct interface *ifp)
+{
+	return 0;
+}
+
+static int eigrp_ifp_destroy(struct interface *ifp)
+{
+	return 0;
+}
+
 struct list *eigrp_iflist;
 
 void eigrp_if_init(void)
 {
+	if_zapi_callbacks(eigrp_ifp_create, eigrp_ifp_up,
+			  eigrp_ifp_down, eigrp_ifp_destroy);
 	/* Initialize Zebra interface data structure. */
 	// hook_register_prio(if_add, 0, eigrp_if_new);
 	hook_register_prio(if_del, 0, eigrp_if_delete_hook);
diff --git a/eigrpd/eigrp_interface.h b/eigrpd/eigrp_interface.h
index a18b0b7015..1e66dafde2 100644
--- a/eigrpd/eigrp_interface.h
+++ b/eigrpd/eigrp_interface.h
@@ -63,5 +63,4 @@ extern uint32_t eigrp_scaled_to_bandwidth(uint32_t);
 extern uint32_t eigrp_delay_to_scaled(uint32_t);
 extern uint32_t eigrp_scaled_to_delay(uint32_t);
 
-
 #endif /* ZEBRA_EIGRP_INTERFACE_H_ */