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resolved: shortcut lookups names in the local zone 

Previously, we'd always generate a packet on the wire, even for names
that are within our local zone. Shortcut this, and always check the
local zone first. This should minimize generated traffic and improve
security.
This commit is contained in:
Lennart Poettering 2015-11-18 15:33:37 +01:00
parent 5032b16dfe
commit d746bb3eb2
1 changed files with 14 additions and 0 deletions
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14
src/resolve/resolved-dns-transaction.c
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@ -626,6 +626,20 @@ int dns_transaction_go(DnsTransaction *t) {
t->cached = dns_answer_unref(t->cached);
t->cached_rcode = 0;
/* Check the zone, but obly if this transaction is not used
* for probing or verifying a zone item. */
if (set_isempty(t->zone_items)) {
r = dns_zone_lookup(&t->scope->zone, t->key, &t->cached, NULL, NULL);
if (r < 0)
return r;
if (r > 0) {
t->cached_rcode = DNS_RCODE_SUCCESS;
dns_transaction_complete(t, DNS_TRANSACTION_SUCCESS);
return 0;
}
}
/* Check the cache, but only if this transaction is not used
* for probing or verifying a zone item. */
if (set_isempty(t->zone_items)) {