1 /* MIT License
2 *
3 * Copyright (c) 2023 Brad House
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
22 * SOFTWARE.
23 *
24 * SPDX-License-Identifier: MIT
25 */
26
27 #include "ares_private.h"
28
ares_create_query_int(const char * name,int dnsclass,int type,unsigned short id,int rd,unsigned char ** bufp,int * buflenp,int max_udp_size)29 static int ares_create_query_int(const char *name, int dnsclass, int type,
30 unsigned short id, int rd,
31 unsigned char **bufp, int *buflenp,
32 int max_udp_size)
33 {
34 ares_status_t status;
35 ares_dns_record_t *dnsrec = NULL;
36 size_t len;
37 ares_dns_flags_t rd_flag = rd ? ARES_FLAG_RD : 0;
38
39 if (name == NULL || bufp == NULL || buflenp == NULL) {
40 status = ARES_EFORMERR;
41 goto done;
42 }
43
44 *bufp = NULL;
45 *buflenp = 0;
46
47 status = ares_dns_record_create_query(
48 &dnsrec, name, (ares_dns_class_t)dnsclass, (ares_dns_rec_type_t)type, id,
49 rd_flag, (size_t)max_udp_size);
50 if (status != ARES_SUCCESS) {
51 goto done;
52 }
53
54 status = ares_dns_write(dnsrec, bufp, &len);
55 if (status != ARES_SUCCESS) {
56 goto done;
57 }
58
59 *buflenp = (int)len;
60
61 done:
62 ares_dns_record_destroy(dnsrec);
63 return (int)status;
64 }
65
ares_create_query(const char * name,int dnsclass,int type,unsigned short id,int rd,unsigned char ** bufp,int * buflenp,int max_udp_size)66 int ares_create_query(const char *name, int dnsclass, int type,
67 unsigned short id, int rd, unsigned char **bufp,
68 int *buflenp, int max_udp_size)
69 {
70 return ares_create_query_int(name, dnsclass, type, id, rd, bufp, buflenp,
71 max_udp_size);
72 }
73
ares_mkquery(const char * name,int dnsclass,int type,unsigned short id,int rd,unsigned char ** buf,int * buflen)74 int ares_mkquery(const char *name, int dnsclass, int type, unsigned short id,
75 int rd, unsigned char **buf, int *buflen)
76 {
77 return ares_create_query_int(name, dnsclass, type, id, rd, buf, buflen, 0);
78 }
79