1/* MIT License
2 *
3 * Copyright (c) 1998 Massachusetts Institute of Technology
4 * Copyright (c) 2019 Andrew Selivanov
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * SPDX-License-Identifier: MIT
26 */
27
28#include "ares_setup.h"
29
30#ifdef HAVE_NETDB_H
31#  include <netdb.h>
32#endif
33
34#include "ares.h"
35#include "ares_private.h"
36
37void ares__freeaddrinfo_cnames(struct ares_addrinfo_cname *head)
38{
39  struct ares_addrinfo_cname *current;
40  while (head) {
41    current = head;
42    head    = head->next;
43    ares_free(current->alias);
44    ares_free(current->name);
45    ares_free(current);
46  }
47}
48
49void ares__freeaddrinfo_nodes(struct ares_addrinfo_node *head)
50{
51  struct ares_addrinfo_node *current;
52  while (head) {
53    current = head;
54    head    = head->ai_next;
55    ares_free(current->ai_addr);
56    ares_free(current);
57  }
58}
59
60void ares_freeaddrinfo(struct ares_addrinfo *ai)
61{
62  if (ai == NULL) {
63    return;
64  }
65  ares__freeaddrinfo_cnames(ai->cnames);
66  ares__freeaddrinfo_nodes(ai->nodes);
67
68  ares_free(ai->name);
69  ares_free(ai);
70}
71