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edf87b4fbf
PR-URL: https://github.com/nodejs/node/pull/57792 Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/* MIT License
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*
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* Copyright (c) 1998 Massachusetts Institute of Technology
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* Copyright (c) 2019 Andrew Selivanov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include "ares_private.h"
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_NETDB_H
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# include <netdb.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#ifdef HAVE_LIMITS_H
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# include <limits.h>
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#endif
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int ares_parse_a_reply(const unsigned char *abuf, int alen,
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struct hostent **host, struct ares_addrttl *addrttls,
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int *naddrttls)
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{
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struct ares_addrinfo ai;
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char *question_hostname = NULL;
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ares_status_t status;
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size_t req_naddrttls = 0;
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ares_dns_record_t *dnsrec = NULL;
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if (alen < 0) {
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return ARES_EBADRESP;
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}
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if (naddrttls) {
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req_naddrttls = (size_t)*naddrttls;
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*naddrttls = 0;
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}
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memset(&ai, 0, sizeof(ai));
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status = ares_dns_parse(abuf, (size_t)alen, 0, &dnsrec);
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if (status != ARES_SUCCESS) {
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goto fail;
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}
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status = ares_parse_into_addrinfo(dnsrec, 0, 0, &ai);
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if (status != ARES_SUCCESS && status != ARES_ENODATA) {
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goto fail;
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}
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if (host != NULL) {
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*host = NULL;
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status = ares_addrinfo2hostent(&ai, AF_INET, host);
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if (status != ARES_SUCCESS && status != ARES_ENODATA) {
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goto fail; /* LCOV_EXCL_LINE: DefensiveCoding */
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}
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}
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if (addrttls != NULL && req_naddrttls) {
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size_t temp_naddrttls = 0;
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ares_addrinfo2addrttl(&ai, AF_INET, req_naddrttls, addrttls, NULL,
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&temp_naddrttls);
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*naddrttls = (int)temp_naddrttls;
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}
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fail:
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ares_freeaddrinfo_cnames(ai.cnames);
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ares_freeaddrinfo_nodes(ai.nodes);
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ares_free(ai.name);
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ares_free(question_hostname);
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ares_dns_record_destroy(dnsrec);
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if (status == ARES_EBADNAME) {
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status = ARES_EBADRESP;
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}
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return (int)status;
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}
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