assert(l);
- if (l->dns_servers) {
+ if (link_relevant(l, AF_UNSPEC, false) &&
+ l->dns_servers) {
if (!l->unicast_scope) {
r = dns_scope_new(l->manager, &l->unicast_scope, l, DNS_PROTOCOL_DNS, AF_UNSPEC);
if (r < 0)
} else
l->unicast_scope = dns_scope_free(l->unicast_scope);
- if (link_relevant(l, AF_INET) &&
+ if (link_relevant(l, AF_INET, true) &&
l->llmnr_support != RESOLVE_SUPPORT_NO &&
l->manager->llmnr_support != RESOLVE_SUPPORT_NO) {
if (!l->llmnr_ipv4_scope) {
} else
l->llmnr_ipv4_scope = dns_scope_free(l->llmnr_ipv4_scope);
- if (link_relevant(l, AF_INET6) &&
+ if (link_relevant(l, AF_INET6, true) &&
l->llmnr_support != RESOLVE_SUPPORT_NO &&
l->manager->llmnr_support != RESOLVE_SUPPORT_NO &&
socket_ipv6_is_supported()) {
} else
l->llmnr_ipv6_scope = dns_scope_free(l->llmnr_ipv6_scope);
- if (link_relevant(l, AF_INET) &&
+ if (link_relevant(l, AF_INET, true) &&
l->mdns_support != RESOLVE_SUPPORT_NO &&
l->manager->mdns_support != RESOLVE_SUPPORT_NO) {
if (!l->mdns_ipv4_scope) {
} else
l->mdns_ipv4_scope = dns_scope_free(l->mdns_ipv4_scope);
- if (link_relevant(l, AF_INET6) &&
+ if (link_relevant(l, AF_INET6, true) &&
l->mdns_support != RESOLVE_SUPPORT_NO &&
l->manager->mdns_support != RESOLVE_SUPPORT_NO) {
if (!l->mdns_ipv6_scope) {
return 0;
}
-bool link_relevant(Link *l, int family) {
+bool link_relevant(Link *l, int family, bool multicast) {
_cleanup_free_ char *state = NULL;
LinkAddress *a;
assert(l);
- /* A link is relevant if it isn't a loopback or pointopoint
- * device, has a link beat, can do multicast and has at least
- * one relevant IP address */
+ /* A link is relevant for multicast traffic if it isn't a loopback or pointopoint device, has a link beat, can
+ * do multicast and has at least one relevant IP address */
- if (l->flags & (IFF_LOOPBACK|IFF_POINTOPOINT|IFF_DORMANT))
+ if (l->flags & (IFF_LOOPBACK|IFF_DORMANT))
return false;
- if ((l->flags & (IFF_UP|IFF_LOWER_UP|IFF_MULTICAST)) != (IFF_UP|IFF_LOWER_UP|IFF_MULTICAST))
+ if ((l->flags & (IFF_UP|IFF_LOWER_UP)) != (IFF_UP|IFF_LOWER_UP))
return false;
+ if (multicast) {
+ if (l->flags & IFF_POINTOPOINT)
+ return false;
+
+ if ((l->flags & IFF_MULTICAST) != IFF_MULTICAST)
+ return false;
+ }
+
sd_network_link_get_operational_state(l->ifindex, &state);
if (state && !STR_IN_SET(state, "unknown", "degraded", "routable"))
return false;
LIST_FOREACH(addresses, a, l->addresses)
- if (a->family == family && link_address_relevant(a))
+ if ((family == AF_UNSPEC || a->family == family) && link_address_relevant(a))
return true;
return false;