Current File : /home/vacivi36/vittasync.vacivitta.com.br/vittasync/node/deps/cares/src/lib/ares_create_query.c
/* MIT License
*
* Copyright (c) 2023 Brad House
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MIT
*/
#include "ares_setup.h"
#include "ares.h"
#include "ares_private.h"
int ares_create_query(const char *name, int dnsclass, int type,
unsigned short id, int rd, unsigned char **bufp,
int *buflenp, int max_udp_size)
{
ares_status_t status;
ares_dns_record_t *dnsrec = NULL;
size_t len;
if (name == NULL || bufp == NULL || buflenp == NULL) {
status = ARES_EFORMERR;
goto done;
}
*bufp = NULL;
*buflenp = 0;
/* Per RFC 7686, reject queries for ".onion" domain names with NXDOMAIN. */
if (ares__is_onion_domain(name)) {
status = ARES_ENOTFOUND;
goto done;
}
status = ares_dns_record_create(&dnsrec, id, rd ? ARES_FLAG_RD : 0,
ARES_OPCODE_QUERY, ARES_RCODE_NOERROR);
if (status != ARES_SUCCESS) {
goto done;
}
status = ares_dns_record_query_add(dnsrec, name, (ares_dns_rec_type_t)type,
(ares_dns_class_t)dnsclass);
if (status != ARES_SUCCESS) {
goto done;
}
/* max_udp_size > 0 indicates EDNS, so send OPT RR as an additional record */
if (max_udp_size > 0) {
ares_dns_rr_t *rr = NULL;
status = ares_dns_record_rr_add(&rr, dnsrec, ARES_SECTION_ADDITIONAL, "",
ARES_REC_TYPE_OPT, ARES_CLASS_IN, 0);
if (status != ARES_SUCCESS) {
goto done;
}
if (max_udp_size > 65535) {
status = ARES_EFORMERR;
goto done;
}
status = ares_dns_rr_set_u16(rr, ARES_RR_OPT_UDP_SIZE,
(unsigned short)max_udp_size);
if (status != ARES_SUCCESS) {
goto done;
}
status = ares_dns_rr_set_u8(rr, ARES_RR_OPT_VERSION, 0);
if (status != ARES_SUCCESS) {
goto done;
}
status = ares_dns_rr_set_u16(rr, ARES_RR_OPT_FLAGS, 0);
if (status != ARES_SUCCESS) {
goto done;
}
}
status = ares_dns_write(dnsrec, bufp, &len);
if (status != ARES_SUCCESS) {
goto done;
}
*buflenp = (int)len;
done:
ares_dns_record_destroy(dnsrec);
return (int)status;
}
Mini Shell