Add deprecation for static IPv6 prefixes

diff --git a/interface-ip.c b/interface-ip.c
index 56f8bd9..6906d62 100644 (file)
--- a/interface-ip.c
+++ b/interface-ip.c
@@ -459,7 +459,7 @@ interface_set_prefix_address(struct interface *iface, bool add,
                if (assignment->enabled) {
                        time_t now = system_get_rtime();
                        addr.preferred_until = now;
-                       if (addr.valid_until - now > 7200)
+                       if (!addr.valid_until || addr.valid_until - now > 7200)
                                addr.valid_until = now + 7200;
                        system_add_address(l3_downlink, &addr);
                }