73ef4ff3
 Hu Chunming
提交三方库
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/* Copyright 1998 by the Massachusetts Institute of Technology.
* Copyright (C) 2019 by Andrew Selivanov
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#include "ares_setup.h"
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef HAVE_NETDB_H
# include <netdb.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include "ares_nameser.h"
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_LIMITS_H
# include <limits.h>
#endif
#include "ares.h"
#include "ares_dns.h"
#include "ares_private.h"
int ares_parse_a_reply(const unsigned char *abuf, int alen,
struct hostent **host, struct ares_addrttl *addrttls,
int *naddrttls)
{
struct ares_addrinfo ai;
char *question_hostname = NULL;
int status;
int req_naddrttls = 0;
if (naddrttls)
{
req_naddrttls = *naddrttls;
*naddrttls = 0;
}
memset(&ai, 0, sizeof(ai));
status = ares__parse_into_addrinfo(abuf, alen, 0, 0, &ai);
if (status != ARES_SUCCESS && status != ARES_ENODATA)
{
goto fail;
}
if (host != NULL)
{
status = ares__addrinfo2hostent(&ai, AF_INET, host);
if (status != ARES_SUCCESS && status != ARES_ENODATA)
{
goto fail;
}
}
if (addrttls != NULL && req_naddrttls)
{
ares__addrinfo2addrttl(&ai, AF_INET, req_naddrttls, addrttls,
NULL, naddrttls);
}
fail:
ares__freeaddrinfo_cnames(ai.cnames);
ares__freeaddrinfo_nodes(ai.nodes);
ares_free(ai.name);
ares_free(question_hostname);
return status;
}
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