networkd: Drop IPv6LL address when link is down

Now we are not dropping the IPv6LL address when link is down.
So next time when link is up and before kernel acquired this address
we are using the old address.

When the link is down kernel tells us that this address is no longer
valid . Let's remove this address and again when kernel tells us
that the address is added let's use it.

fixes #3264

1 files changed, 3 insertions, 0 deletions

diff --git a/src/network/networkd-address.c b/src/network/networkd-address.c
index 976f333f7e..367c340e08 100644
--- a/src/network/networkd-address.c
+++ b/src/network/networkd-address.c
@@ -98,6 +98,9 @@ void address_free(Address *address) {
         if (address->link) {
                 set_remove(address->link->addresses, address);
                 set_remove(address->link->addresses_foreign, address);
+
+                if (in_addr_equal(AF_INET6, &address->in_addr, (const union in_addr_union *) &address->link->ipv6ll_address))
+                        memzero(&address->link->ipv6ll_address, sizeof(struct in6_addr));
         }
 
         free(address);