From: Hangbin Liu
Date: Wed, 21 Nov 2018 21:52:33 +0800
> When we add a new IPv6 address, we should also join corresponding
> solicited-node
> multicast address, unless the interface has IFF_NOARP flag, as function
> addrconf_join_solict() did. But if we remove IFF_NOARP flag later, we do
> not
When we add a new IPv6 address, we should also join corresponding solicited-node
multicast address, unless the interface has IFF_NOARP flag, as function
addrconf_join_solict() did. But if we remove IFF_NOARP flag later, we do
not do dad and add the mcast address. So we will drop corresponding
