Function arp_add_ifa_lle

freebsd/netinet/if_ether.c:1289–1323

* Add permanent link-layer record for given interface address. */

 * Add permanent link-layer record for given interface address.
 */
static __noinline void
arp_add_ifa_lle(struct ifnet *ifp, const struct sockaddr *dst)
{
	struct llentry *lle, *lle_tmp;

	/*
	 * Interface address LLE record is considered static
	 * because kernel code relies on LLE_STATIC flag to check
	 * if these entries can be rewriten by arp updates.
	 */
	lle = lltable_alloc_entry(LLTABLE(ifp), LLE_IFADDR | LLE_STATIC, dst);
	if (lle == NULL) {
		log(LOG_INFO, "arp_ifinit: cannot create arp "
		    "entry for interface address\n");
		return;
	}

	IF_AFDATA_WLOCK(ifp);
	LLE_WLOCK(lle);
	/* Unlink any entry if exists */
	lle_tmp = lla_lookup(LLTABLE(ifp), LLE_EXCLUSIVE, dst);
	if (lle_tmp != NULL)
		lltable_unlink_entry(LLTABLE(ifp), lle_tmp);

	lltable_link_entry(LLTABLE(ifp), lle);
	IF_AFDATA_WUNLOCK(ifp);

	if (lle_tmp != NULL)
		EVENTHANDLER_INVOKE(lle_event, lle_tmp, LLENTRY_EXPIRED);

	EVENTHANDLER_INVOKE(lle_event, lle, LLENTRY_RESOLVED);
	LLE_WUNLOCK(lle);
	if (lle_tmp != NULL)
		lltable_free_entry(LLTABLE(ifp), lle_tmp);
}

/*
 * Handle the garp_rexmit_count. Like sysctl_handle_int(), but limits the range