bgpd: Retry connecting to label manager if failed

Fixes: FRRouting/frr#16747

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>

bgpd/bgp_zebra.c

@@ -3583,14 +3583,17 @@ void bgp_if_init(void)
  hook_register_prio(if_del, 0, bgp_if_delete_hook);
 }
 
-static void bgp_start_label_manager(struct event *start)
+static bool bgp_zebra_label_manager_ready(void)
 {
- bgp_zebra_label_manager_connect();
+ return (zclient_sync->sock > 0);
 }
 
-static bool bgp_zebra_label_manager_ready(void)
+static void bgp_start_label_manager(struct event *start)
 {
- return (zclient_sync->sock > 0);
+ if (!bgp_zebra_label_manager_ready() &&
+ !bgp_zebra_label_manager_connect())
+ event_add_timer(bm->master, bgp_start_label_manager, NULL, 1,
+ &bm->t_bgp_start_label_manager);
 }
 
 static bool bgp_zebra_label_manager_connect(void)