*: 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, 4 insertions, 0 deletions

diff --git a/nhrpd/nhrpd.h b/nhrpd/nhrpd.h
index 670c9f4f1..50746d9ad 100644
--- a/nhrpd/nhrpd.h
+++ b/nhrpd/nhrpd.h
@@ -319,6 +319,10 @@ void nhrp_interface_notify_del(struct interface *ifp, struct notifier_block *n);
 void nhrp_interface_set_protection(struct interface *ifp, const char *profile,
 				   const char *fallback_profile);
 void nhrp_interface_set_source(struct interface *ifp, const char *ifname);
+extern int nhrp_ifp_create(struct interface *ifp);
+extern int nhrp_ifp_up(struct interface *ifp);
+extern int nhrp_ifp_down(struct interface *ifp);
+extern int nhrp_ifp_destroy(struct interface *ifp);
 
 int nhrp_nhs_add(struct interface *ifp, afi_t afi, union sockunion *proto_addr,
 		 const char *nbma_fqdn);