return NULL;
}
-DnsServer *dns_scope_get_server(DnsScope *s) {
+DnsServer *dns_scope_get_dns_server(DnsScope *s) {
assert(s);
if (s->protocol != DNS_PROTOCOL_DNS)
if (DNS_PACKET_QDCOUNT(p) > 1)
return -ENOTSUP;
- srv = dns_scope_get_server(s);
+ srv = dns_scope_get_dns_server(s);
if (!srv)
return -ESRCH;
if (family == AF_UNSPEC) {
DnsServer *srv;
- srv = dns_scope_get_server(s);
+ srv = dns_scope_get_dns_server(s);
if (!srv)
return -ESRCH;
if (s->link)
return !!link_find_dns_server(s->link, family, address);
else
- return manager_known_dns_server(s->manager, family, address);
+ return !!manager_find_dns_server(s->manager, family, address);
}
static int dns_scope_make_reply_packet(
int dns_scope_good_key(DnsScope *s, DnsResourceKey *key);
int dns_scope_good_dns_server(DnsScope *s, int family, const union in_addr_union *address);
-DnsServer *dns_scope_get_server(DnsScope *s);
+DnsServer *dns_scope_get_dns_server(DnsScope *s);
void dns_scope_next_dns_server(DnsScope *s);
int dns_scope_llmnr_membership(DnsScope *s, bool b);
if (type != DNS_SERVER_FALLBACK &&
s->manager->current_dns_server &&
s->manager->current_dns_server->type == DNS_SERVER_FALLBACK)
- s->manager->current_dns_server = NULL;
+ manager_set_dns_server(s->manager, NULL);
if (ret)
*ret = s;
}
if (s->link && s->link->current_dns_server == s)
- s->link->current_dns_server = NULL;
+ link_set_dns_server(s->link, NULL);
if (s->manager && s->manager->current_dns_server == s)
- s->manager->current_dns_server = NULL;
+ manager_set_dns_server(s->manager, NULL);
free(s);
t->cached = dns_answer_unref(t->cached);
t->cached_rcode = 0;
- /* First, let's try the cache */
+ /* Before trying the cache, let's make sure we figured out a
+ * server to use. Should this cause a change of server this
+ * might flush the cache. */
+ dns_scope_get_dns_server(t->scope);
+
+ /* Let's then prune all outdated entries */
dns_cache_prune(&t->scope->cache);
+
r = dns_cache_lookup(&t->scope->cache, t->question, &t->cached_rcode, &t->cached);
if (r < 0)
return r;
if (r > 0) {
+ log_debug("Cache hit!");
if (t->cached_rcode == DNS_RCODE_SUCCESS)
dns_transaction_complete(t, DNS_TRANSACTION_SUCCESS);
else
return 0;
}
+ log_debug("Cache miss!");
+
/* Otherwise, we need to ask the network */
r = dns_transaction_make_packet(t);
if (r == -EDOM) {
return NULL;
}
-static DnsServer* link_set_dns_server(Link *l, DnsServer *s) {
+DnsServer* link_set_dns_server(Link *l, DnsServer *s) {
assert(l);
if (l->current_dns_server == s)
in_addr_to_string(s->family, &s->address, &ip);
log_info("Switching to DNS server %s for interface %s.", strna(ip), l->name);
- } else
- log_info("No DNS server set for interface %s.", l->name);
+ }
l->current_dns_server = s;
+
+ if (l->unicast_scope)
+ dns_cache_flush(&l->unicast_scope->cache);
+
return s;
}
bool link_relevant(Link *l, int family);
LinkAddress* link_find_address(Link *l, int family, const union in_addr_union *in_addr);
void link_add_rrs(Link *l, bool force_remove);
+
+DnsServer* link_set_dns_server(Link *l, DnsServer *s);
DnsServer* link_find_dns_server(Link *l, int family, const union in_addr_union *in_addr);
DnsServer* link_get_dns_server(Link *l);
void link_next_dns_server(Link *l);
return -EAFNOSUPPORT;
}
-bool manager_known_dns_server(Manager *m, int family, const union in_addr_union *in_addr) {
+DnsServer* manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr) {
DnsServer *s;
assert(m);
LIST_FOREACH(servers, s, m->dns_servers)
if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)
- return true;
+ return s;
LIST_FOREACH(servers, s, m->fallback_dns_servers)
if (s->family == family && in_addr_equal(family, &s->address, in_addr) > 0)
- return true;
+ return s;
- return false;
+ return NULL;
}
-static DnsServer *manager_set_dns_server(Manager *m, DnsServer *s) {
+DnsServer *manager_set_dns_server(Manager *m, DnsServer *s) {
assert(m);
if (m->current_dns_server == s)
in_addr_to_string(s->family, &s->address, &ip);
log_info("Switching to system DNS server %s.", strna(ip));
- } else
- log_info("No system DNS server set.");
+ }
m->current_dns_server = s;
+
+ if (m->unicast_scope)
+ dns_cache_flush(&m->unicast_scope->cache);
+
return s;
}
int manager_read_resolv_conf(Manager *m);
int manager_write_resolv_conf(Manager *m);
-bool manager_known_dns_server(Manager *m, int family, const union in_addr_union *in_addr);
+DnsServer *manager_set_dns_server(Manager *m, DnsServer *s);
+DnsServer *manager_find_dns_server(Manager *m, int family, const union in_addr_union *in_addr);
DnsServer *manager_get_dns_server(Manager *m);
void manager_next_dns_server(Manager *m);