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resolved: bypass local cache when we issue a transaction for verification purposes

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Lennart Poettering 2014-08-05 01:42:15 +02:00
parent cd1b20f90a
commit 4d926a69bc
1 changed files with 21 additions and 16 deletions
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37
src/resolve/resolved-dns-transaction.c
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@ -465,24 +465,29 @@ int dns_transaction_go(DnsTransaction *t) {
t->cached = dns_answer_unref(t->cached); t->cached = dns_answer_unref(t->cached);
t->cached_rcode = 0; t->cached_rcode = 0;
/* Before trying the cache, let's make sure we figured out a /* Check the cache, but only if this transaction is not used
* server to use. Should this cause a change of server this * for probing or verifying a zone item. */
* might flush the cache. */ if (set_isempty(t->zone_items)) {
dns_scope_get_dns_server(t->scope);
/* Let's then prune all outdated entries */ /* Before trying the cache, let's make sure we figured out a
dns_cache_prune(&t->scope->cache); * server to use. Should this cause a change of server this
* might flush the cache. */
dns_scope_get_dns_server(t->scope);
r = dns_cache_lookup(&t->scope->cache, t->question, &t->cached_rcode, &t->cached); /* Let's then prune all outdated entries */
if (r < 0) dns_cache_prune(&t->scope->cache);
return r;
if (r > 0) { r = dns_cache_lookup(&t->scope->cache, t->question, &t->cached_rcode, &t->cached);
log_debug("Cache hit!"); if (r < 0)
if (t->cached_rcode == DNS_RCODE_SUCCESS) return r;
dns_transaction_complete(t, DNS_TRANSACTION_SUCCESS); if (r > 0) {
else log_debug("Cache hit!");
dns_transaction_complete(t, DNS_TRANSACTION_FAILURE); if (t->cached_rcode == DNS_RCODE_SUCCESS)
return 0; dns_transaction_complete(t, DNS_TRANSACTION_SUCCESS);
else
dns_transaction_complete(t, DNS_TRANSACTION_FAILURE);
return 0;
}
} }
log_debug("Cache miss!"); log_debug("Cache miss!");