net: if: Clear neighbor cache when removing IPv6 addr with active DAD (a09fd8e9) · Commits · Wenxi XU / zephyr

DAD creates an entry in the neighbor cache for the queried (own) address. In case the address is removed from the interface while DAD is still incomplete, we need to remove the corresponding cache entry (just like in case of DAD timeout) to avoid stale entries in the cache. Signed-off-by:

Robert Lubos <robert.lubos@nordicsemi.no>

subsys/net/ip/net_if.c

+7 −2

Changes for subsys/net/ip/net_if.c: 7 added lines, 2 removed lines.
Original line number	Diff line number	Diff line
		@@ -5127,8 +5127,13 @@ static void remove_ipv6_ifaddr(struct net_if *iface,
		#if defined(CONFIG_NET_IPV6_DAD)
		if (!net_if_flag_is_set(iface, NET_IF_IPV6_NO_ND)) {
		k_mutex_lock(&lock, K_FOREVER);
		sys_slist_find_and_remove(&active_dad_timers,
		&ifaddr->dad_node);
		if (sys_slist_find_and_remove(&active_dad_timers,
		&ifaddr->dad_node)) {
		/* Addreess with active DAD timer would still have
		* stale entry in the neighbor cache.
		*/
		net_ipv6_nbr_rm(iface, &ifaddr->address.in6_addr);
		}
		k_mutex_unlock(&lock);
		}
		#endif

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