*: 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, 22 insertions, 0 deletions

diff --git a/ospf6d/ospf6_interface.c b/ospf6d/ospf6_interface.c
index 692c84ad0..50e9f80cc 100644
--- a/ospf6d/ospf6_interface.c
+++ b/ospf6d/ospf6_interface.c
@@ -1935,11 +1935,33 @@ static struct cmd_node interface_node = {
 	INTERFACE_NODE, "%s(config-if)# ", 1 /* VTYSH */
 };
 
+static int ospf6_ifp_create(struct interface *ifp)
+{
+	return 0;
+}
+
+static int ospf6_ifp_up(struct interface *ifp)
+{
+	return 0;
+}
+
+static int ospf6_ifp_down(struct interface *ifp)
+{
+	return 0;
+}
+
+static int ospf6_ifp_destroy(struct interface *ifp)
+{
+	return 0;
+}
+
 void ospf6_interface_init(void)
 {
 	/* Install interface node. */
 	install_node(&interface_node, config_write_ospf6_interface);
 	if_cmd_init();
+	if_zapi_callbacks(ospf6_ifp_create, ospf6_ifp_up,
+			  ospf6_ifp_down, ospf6_ifp_destroy);
 
 	install_element(VIEW_NODE, &show_ipv6_ospf6_interface_prefix_cmd);
 	install_element(VIEW_NODE, &show_ipv6_ospf6_interface_ifname_cmd);