void link_allocate_scopes(Link *l) {
int r;
assert(l);
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)
log_warning_errno(r, "Failed to allocate DNS scope: %m");
}
} else
l->unicast_scope = dns_scope_free(l->unicast_scope);
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) {
r = dns_scope_new(l->manager, &l->llmnr_ipv4_scope, l, DNS_PROTOCOL_LLMNR, AF_INET);
if (r < 0)
log_warning_errno(r, "Failed to allocate LLMNR IPv4 scope: %m");
}
} else
l->llmnr_ipv4_scope = dns_scope_free(l->llmnr_ipv4_scope);
if (link_relevant(l, AF_INET6, true) &&
l->llmnr_support != RESOLVE_SUPPORT_NO &&
l->manager->llmnr_support != RESOLVE_SUPPORT_NO &&
socket_ipv6_is_supported()) {
if (!l->llmnr_ipv6_scope) {
r = dns_scope_new(l->manager, &l->llmnr_ipv6_scope, l, DNS_PROTOCOL_LLMNR, AF_INET6);
if (r < 0)
log_warning_errno(r, "Failed to allocate LLMNR IPv6 scope: %m");
}
} else
l->llmnr_ipv6_scope = dns_scope_free(l->llmnr_ipv6_scope);
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) {
r = dns_scope_new(l->manager, &l->mdns_ipv4_scope, l, DNS_PROTOCOL_MDNS, AF_INET);
if (r < 0)
log_warning_errno(r, "Failed to allocate mDNS IPv4 scope: %m");
}
} else
l->mdns_ipv4_scope = dns_scope_free(l->mdns_ipv4_scope);
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) {
r = dns_scope_new(l->manager, &l->mdns_ipv6_scope, l, DNS_PROTOCOL_MDNS, AF_INET6);
if (r < 0)
log_warning_errno(r, "Failed to allocate mDNS IPv6 scope: %m");
}
} else
l->mdns_ipv6_scope = dns_scope_free(l->mdns_ipv6_scope);
}
Link *link_free(Link *l) {
if (!l)
return NULL;
/* Send goodbye messages. */
dns_scope_announce(l->mdns_ipv4_scope, true);
dns_scope_announce(l->mdns_ipv6_scope, true);
link_flush_settings(l);
while (l->addresses)
(void) link_address_free(l->addresses);
if (l->manager)
hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
dns_scope_free(l->unicast_scope);
dns_scope_free(l->llmnr_ipv4_scope);
dns_scope_free(l->llmnr_ipv6_scope);
dns_scope_free(l->mdns_ipv4_scope);
dns_scope_free(l->mdns_ipv6_scope);
free(l->state_file);
return mfree(l);
}
Link *link_free(Link *l) {
if (!l)
return NULL;
dns_server_unlink_marked(l->dns_servers);
dns_search_domain_unlink_all(l->search_domains);
while (l->addresses)
link_address_free(l->addresses);
if (l->manager)
hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
dns_scope_free(l->unicast_scope);
dns_scope_free(l->llmnr_ipv4_scope);
dns_scope_free(l->llmnr_ipv6_scope);
free(l);
return NULL;
}
Link *link_free(Link *l) {
if (!l)
return NULL;
link_flush_settings(l);
while (l->addresses)
(void) link_address_free(l->addresses);
if (l->manager)
hashmap_remove(l->manager->links, INT_TO_PTR(l->ifindex));
dns_scope_free(l->unicast_scope);
dns_scope_free(l->llmnr_ipv4_scope);
dns_scope_free(l->llmnr_ipv6_scope);
dns_scope_free(l->mdns_ipv4_scope);
dns_scope_free(l->mdns_ipv6_scope);
free(l);
return NULL;
}
void link_allocate_scopes(Link *l) {
bool unicast_relevant;
int r;
assert(l);
/* If a link that used to be relevant is no longer, or a link that did not use to be relevant now becomes
* relevant, let's reinit the learnt global DNS server information, since we might talk to different servers
* now, even if they have the same addresses as before. */
unicast_relevant = link_relevant(l, AF_UNSPEC, false);
if (unicast_relevant != l->unicast_relevant) {
l->unicast_relevant = unicast_relevant;
dns_server_reset_features_all(l->manager->fallback_dns_servers);
dns_server_reset_features_all(l->manager->dns_servers);
}
/* And now, allocate all scopes that makes sense now if we didn't have them yet, and drop those which we don't
* need anymore */
if (unicast_relevant && l->dns_servers) {
if (!l->unicast_scope) {
dns_server_reset_features_all(l->dns_servers);
r = dns_scope_new(l->manager, &l->unicast_scope, l, DNS_PROTOCOL_DNS, AF_UNSPEC);
if (r < 0)
log_warning_errno(r, "Failed to allocate DNS scope: %m");
}
} else
l->unicast_scope = dns_scope_free(l->unicast_scope);
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) {
r = dns_scope_new(l->manager, &l->llmnr_ipv4_scope, l, DNS_PROTOCOL_LLMNR, AF_INET);
if (r < 0)
log_warning_errno(r, "Failed to allocate LLMNR IPv4 scope: %m");
}
} else
l->llmnr_ipv4_scope = dns_scope_free(l->llmnr_ipv4_scope);
if (link_relevant(l, AF_INET6, true) &&
l->llmnr_support != RESOLVE_SUPPORT_NO &&
l->manager->llmnr_support != RESOLVE_SUPPORT_NO &&
socket_ipv6_is_supported()) {
if (!l->llmnr_ipv6_scope) {
r = dns_scope_new(l->manager, &l->llmnr_ipv6_scope, l, DNS_PROTOCOL_LLMNR, AF_INET6);
if (r < 0)
log_warning_errno(r, "Failed to allocate LLMNR IPv6 scope: %m");
}
} else
l->llmnr_ipv6_scope = dns_scope_free(l->llmnr_ipv6_scope);
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) {
r = dns_scope_new(l->manager, &l->mdns_ipv4_scope, l, DNS_PROTOCOL_MDNS, AF_INET);
if (r < 0)
log_warning_errno(r, "Failed to allocate mDNS IPv4 scope: %m");
}
} else
l->mdns_ipv4_scope = dns_scope_free(l->mdns_ipv4_scope);
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) {
r = dns_scope_new(l->manager, &l->mdns_ipv6_scope, l, DNS_PROTOCOL_MDNS, AF_INET6);
if (r < 0)
log_warning_errno(r, "Failed to allocate mDNS IPv6 scope: %m");
}
} else
l->mdns_ipv6_scope = dns_scope_free(l->mdns_ipv6_scope);
}
