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Merge pull request #52 from ghazel/20_evdns_probe

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cancel the probe request when the server is freed, and ignore cancelled probe callbacks
This commit is contained in:
Nick Mathewson 2012-04-19 08:11:05 -07:00
commit 37c4fc8d0c
1 changed files with 10 additions and 3 deletions
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13
evdns.c
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@ -2250,13 +2250,16 @@ nameserver_probe_callback(int result, char type, int count, int ttl, void *addre
(void) ttl;
(void) addresses;
EVDNS_LOCK(ns->base);
ns->probe_request = NULL;
if (result == DNS_ERR_CANCEL) {
/* We canceled this request because the nameserver came up
* for some other reason. Do not change our opinion about
* the nameserver. */
} else if (result == DNS_ERR_NONE || result == DNS_ERR_NOTEXIST) {
return;
}
EVDNS_LOCK(ns->base);
ns->probe_request = NULL;
if (result == DNS_ERR_NONE || result == DNS_ERR_NOTEXIST) {
/* this is a good reply */
nameserver_up(ns);
} else {
@ -2361,6 +2364,10 @@ evdns_base_clear_nameservers_and_suspend(struct evdns_base *base)
(void) event_del(&server->event);
if (evtimer_initialized(&server->timeout_event))
(void) evtimer_del(&server->timeout_event);
if (server->probe_request) {
evdns_cancel_request(server->base, server->probe_request);
server->probe_request = NULL;
}
if (server->socket >= 0)
evutil_closesocket(server->socket);
mm_free(server);