mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
3.3 KiB
135 lines
3.3 KiB
|
|
/* Copyright 1998 by the Massachusetts Institute of Technology.
|
|
* Copyright (C) 2012 Marko Kreen <markokr@gmail.com>
|
|
*
|
|
* 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_SYS_SOCKET_H
|
|
# include <sys/socket.h>
|
|
#endif
|
|
#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
|
|
#ifdef HAVE_ARPA_NAMESER_H
|
|
# include <arpa/nameser.h>
|
|
#else
|
|
# include "nameser.h"
|
|
#endif
|
|
#ifdef HAVE_ARPA_NAMESER_COMPAT_H
|
|
# include <arpa/nameser_compat.h>
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include "ares.h"
|
|
#include "ares_dns.h"
|
|
#include "ares_data.h"
|
|
#include "ares_private.h"
|
|
|
|
int
|
|
ares_parse_soa_reply(const unsigned char *abuf, int alen,
|
|
struct ares_soa_reply **soa_out)
|
|
{
|
|
const unsigned char *aptr;
|
|
long len;
|
|
char *qname = NULL, *rr_name = NULL;
|
|
struct ares_soa_reply *soa = NULL;
|
|
int qdcount, ancount;
|
|
int status;
|
|
|
|
if (alen < HFIXEDSZ)
|
|
return ARES_EBADRESP;
|
|
|
|
/* parse message header */
|
|
qdcount = DNS_HEADER_QDCOUNT(abuf);
|
|
ancount = DNS_HEADER_ANCOUNT(abuf);
|
|
if (qdcount != 1 || ancount != 1)
|
|
return ARES_EBADRESP;
|
|
aptr = abuf + HFIXEDSZ;
|
|
|
|
/* query name */
|
|
status = ares__expand_name_for_response(aptr, abuf, alen, &qname, &len);
|
|
if (status != ARES_SUCCESS)
|
|
goto failed_stat;
|
|
aptr += len;
|
|
|
|
/* skip qtype & qclass */
|
|
if (aptr + QFIXEDSZ > abuf + alen)
|
|
goto failed;
|
|
aptr += QFIXEDSZ;
|
|
|
|
/* rr_name */
|
|
status = ares__expand_name_for_response(aptr, abuf, alen, &rr_name, &len);
|
|
if (status != ARES_SUCCESS)
|
|
goto failed_stat;
|
|
aptr += len;
|
|
|
|
/* skip rr_type, rr_class, rr_ttl, rr_rdlen */
|
|
if (aptr + RRFIXEDSZ > abuf + alen)
|
|
goto failed;
|
|
aptr += RRFIXEDSZ;
|
|
|
|
/* allocate result struct */
|
|
soa = ares_malloc_data(ARES_DATATYPE_SOA_REPLY);
|
|
if (!soa)
|
|
return ARES_ENOMEM;
|
|
|
|
/* nsname */
|
|
status = ares__expand_name_for_response(aptr, abuf, alen, &soa->nsname, &len);
|
|
if (status != ARES_SUCCESS)
|
|
goto failed_stat;
|
|
aptr += len;
|
|
|
|
/* hostmaster */
|
|
status = ares__expand_name_for_response(aptr, abuf, alen, &soa->hostmaster, &len);
|
|
if (status != ARES_SUCCESS)
|
|
goto failed_stat;
|
|
aptr += len;
|
|
|
|
/* integer fields */
|
|
if (aptr + 5 * 4 > abuf + alen)
|
|
goto failed;
|
|
soa->serial = DNS__32BIT(aptr + 0 * 4);
|
|
soa->refresh = DNS__32BIT(aptr + 1 * 4);
|
|
soa->retry = DNS__32BIT(aptr + 2 * 4);
|
|
soa->expire = DNS__32BIT(aptr + 3 * 4);
|
|
soa->minttl = DNS__32BIT(aptr + 4 * 4);
|
|
|
|
free(qname);
|
|
free(rr_name);
|
|
|
|
*soa_out = soa;
|
|
|
|
return ARES_SUCCESS;
|
|
|
|
failed:
|
|
status = ARES_EBADRESP;
|
|
|
|
failed_stat:
|
|
ares_free_data(soa);
|
|
if (qname)
|
|
free(qname);
|
|
if (rr_name)
|
|
free(rr_name);
|
|
return status;
|
|
}
|
|
|
|
|