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resolved: if there's already an RR established that has the same name of an RR to be established, skip probing the name

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After all, what has been probed once, doesn't need to be probed again.
This commit is contained in:
Lennart Poettering
2014-08-05 01:38:13 +02:00
parent 24fb7c1fa6
commit cd1b20f90a
1 changed files with 26 additions and 6 deletions
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32
src/resolve/resolved-dns-zone.c
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@@ -260,14 +260,34 @@ int dns_zone_put(DnsZone *z, DnsScope *s, DnsResourceRecord *rr, bool probe) {
return r;
if (probe) {
r = dns_zone_item_probe_start(i);
if (r < 0) {
dns_zone_item_remove_and_free(z, i);
i = NULL;
return r;
DnsZoneItem *first, *j;
bool established = false;
/* Check if there's already an RR with the same name
* established. If so, it has been probed already, and
* we don't ned to probe again. */
LIST_FIND_HEAD(by_name, i, first);
LIST_FOREACH(by_name, j, first) {
if (i == j)
continue;
if (j->state == DNS_ZONE_ITEM_ESTABLISHED)
established = true;
}
i->state = DNS_ZONE_ITEM_PROBING;
if (established)
i->state = DNS_ZONE_ITEM_ESTABLISHED;
else {
r = dns_zone_item_probe_start(i);
if (r < 0) {
dns_zone_item_remove_and_free(z, i);
i = NULL;
return r;
}
i->state = DNS_ZONE_ITEM_PROBING;
}
} else
i->state = DNS_ZONE_ITEM_ESTABLISHED;