-/* $Id$ */
/* Copyright (C) 2004 by Daniel Stenberg et al
*
* without express or implied warranty.
*/
-#include "setup.h"
+#include "ares_setup.h"
+#include <assert.h>
#include <stdlib.h>
#include "ares.h"
#include "ares_private.h"
/*
- * ares_cancel() cancels a ongoing request/resolve that might be going on on
- * the given channel. It does NOT kill the channel, use ares_destroy() for
+ * ares_cancel() cancels all ongoing requests/resolves that might be going on
+ * on the given channel. It does NOT kill the channel, use ares_destroy() for
* that.
*/
void ares_cancel(ares_channel channel)
{
- struct query *query, *next;
+ struct query *query;
+ struct list_node* list_head;
+ struct list_node* list_node;
int i;
- for (query = channel->queries; query; query = next)
+ list_head = &(channel->all_queries);
+ for (list_node = list_head->next; list_node != list_head; )
{
- next = query->next;
- query->callback(query->arg, ARES_ETIMEOUT, NULL, 0);
- free(query->tcpbuf);
- free(query->skip_server);
- free(query);
+ query = list_node->data;
+ list_node = list_node->next; /* since we're deleting the query */
+ query->callback(query->arg, ARES_ECANCELLED, 0, NULL, 0);
+ ares__free_query(query);
}
- channel->queries = NULL;
+#ifndef NDEBUG
+ /* Freeing the query should remove it from all the lists in which it sits,
+ * so all query lists should be empty now.
+ */
+ assert(ares__is_list_empty(&(channel->all_queries)));
+ for (i = 0; i < ARES_QID_TABLE_SIZE; i++)
+ {
+ assert(ares__is_list_empty(&(channel->queries_by_qid[i])));
+ }
+ for (i = 0; i < ARES_TIMEOUT_TABLE_SIZE; i++)
+ {
+ assert(ares__is_list_empty(&(channel->queries_by_timeout[i])));
+ }
+#endif
if (!(channel->flags & ARES_FLAG_STAYOPEN))
{
- for (i = 0; i < channel->nservers; i++)
- ares__close_sockets(channel, &channel->servers[i]);
+ if (channel->servers)
+ {
+ for (i = 0; i < channel->nservers; i++)
+ ares__close_sockets(channel, &channel->servers[i]);
+ }
}
}