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_private.h"
29
30 #ifdef HAVE_NETDB_H
31 # include <netdb.h>
32 #endif
33
ares_freeaddrinfo_cnames(struct ares_addrinfo_cname * head)34 void ares_freeaddrinfo_cnames(struct ares_addrinfo_cname *head)
35 {
36 struct ares_addrinfo_cname *current;
37 while (head) {
38 current = head;
39 head = head->next;
40 ares_free(current->alias);
41 ares_free(current->name);
42 ares_free(current);
43 }
44 }
45
ares_freeaddrinfo_nodes(struct ares_addrinfo_node * head)46 void ares_freeaddrinfo_nodes(struct ares_addrinfo_node *head)
47 {
48 struct ares_addrinfo_node *current;
49 while (head) {
50 current = head;
51 head = head->ai_next;
52 ares_free(current->ai_addr);
53 ares_free(current);
54 }
55 }
56
ares_freeaddrinfo(struct ares_addrinfo * ai)57 void ares_freeaddrinfo(struct ares_addrinfo *ai)
58 {
59 if (ai == NULL) {
60 return;
61 }
62 ares_freeaddrinfo_cnames(ai->cnames);
63 ares_freeaddrinfo_nodes(ai->nodes);
64
65 ares_free(ai->name);
66 ares_free(ai);
67 }
68