2017-11-20 19:49:47 +00:00
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/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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1996-12-30 13:18:48 +00:00
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* ++Copyright++ 1985, 1988, 1993
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* -
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1994-09-25 02:12:49 +00:00
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* Copyright (c) 1985, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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2017-02-28 23:42:47 +00:00
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* 3. Neither the name of the University nor the names of its contributors
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1994-09-25 02:12:49 +00:00
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* -
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* Portions Copyright (c) 1993 by Digital Equipment Corporation.
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1995-05-30 05:51:47 +00:00
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*
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1994-09-25 02:12:49 +00:00
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies, and that
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* the name of Digital Equipment Corporation not be used in advertising or
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* publicity pertaining to distribution of the document or software without
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* specific, written prior permission.
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1995-05-30 05:51:47 +00:00
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*
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1994-09-25 02:12:49 +00:00
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* THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
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* CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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* -
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* --Copyright--
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)gethostnamadr.c 8.1 (Berkeley) 6/4/93";
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1998-05-02 13:11:02 +00:00
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static char fromrcsid[] = "From: Id: gethnamaddr.c,v 8.23 1998/04/07 04:59:46 vixie Exp $";
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1994-09-25 02:12:49 +00:00
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#endif /* LIBC_SCCS and not lint */
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2002-03-22 21:53:29 +00:00
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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1994-09-25 02:12:49 +00:00
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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1995-08-20 20:03:06 +00:00
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#include <stdio.h>
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2002-10-03 17:25:33 +00:00
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#include <stdlib.h>
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1995-10-22 14:39:06 +00:00
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#include <unistd.h>
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1995-08-20 20:03:06 +00:00
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#include <string.h>
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1994-09-25 02:12:49 +00:00
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#include <netdb.h>
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#include <resolv.h>
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#include <ctype.h>
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#include <errno.h>
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#include <syslog.h>
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Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
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#include <stdarg.h>
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#include <nsswitch.h>
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1994-09-25 02:12:49 +00:00
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2005-04-27 19:12:57 +00:00
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#include "netdb_private.h"
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1995-08-21 09:15:40 +00:00
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#include "res_config.h"
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1994-09-25 02:12:49 +00:00
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1996-08-29 20:08:19 +00:00
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#define SPRINTF(x) ((size_t)sprintf x)
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1994-09-25 02:12:49 +00:00
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static const char AskedForGot[] =
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1996-01-13 09:03:58 +00:00
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"gethostby*.gethostanswer: asked for \"%s\", got \"%s\"";
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1994-09-25 02:12:49 +00:00
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1996-01-13 09:03:58 +00:00
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#ifdef RESOLVSORT
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Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
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static void addrsort(char **, int, res_state);
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1996-01-13 09:03:58 +00:00
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#endif
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2001-08-20 12:53:36 +00:00
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#ifdef DEBUG
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2016-05-10 07:45:44 +00:00
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static void dbg_printf(char *, int, res_state) __printflike(1, 0);
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2001-08-20 12:53:36 +00:00
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#endif
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2002-10-03 17:25:33 +00:00
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#define MAXPACKET (64*1024)
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1994-09-25 02:12:49 +00:00
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typedef union {
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HEADER hdr;
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u_char buf[MAXPACKET];
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} querybuf;
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typedef union {
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int32_t al;
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char ac;
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} align;
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1996-11-01 06:25:43 +00:00
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int _dns_ttl_;
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1994-09-25 02:12:49 +00:00
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1995-08-20 20:03:06 +00:00
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#ifdef DEBUG
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static void
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2016-05-10 07:45:44 +00:00
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dbg_printf(char *msg, int num, res_state res)
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1995-08-20 20:03:06 +00:00
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{
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Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
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if (res->options & RES_DEBUG) {
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1995-08-20 20:03:06 +00:00
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int save = errno;
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printf(msg, num);
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errno = save;
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}
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}
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#else
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2016-05-10 07:45:44 +00:00
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# define dbg_printf(msg, num, res) /*nada*/
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1995-08-20 20:03:06 +00:00
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#endif
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1998-05-02 13:11:02 +00:00
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#define BOUNDED_INCR(x) \
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do { \
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cp += x; \
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if (cp > eom) { \
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2006-04-15 16:20:27 +00:00
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RES_SET_H_ERRNO(statp, NO_RECOVERY); \
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return (-1); \
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1998-05-02 13:11:02 +00:00
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} \
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} while (0)
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#define BOUNDS_CHECK(ptr, count) \
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do { \
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if ((ptr) + (count) > eom) { \
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2006-04-15 16:20:27 +00:00
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RES_SET_H_ERRNO(statp, NO_RECOVERY); \
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return (-1); \
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1998-05-02 13:11:02 +00:00
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} \
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} while (0)
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2005-04-28 18:03:43 +00:00
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static int
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gethostanswer(const querybuf *answer, int anslen, const char *qname, int qtype,
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2006-04-15 16:20:27 +00:00
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struct hostent *he, struct hostent_data *hed, res_state statp)
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1994-09-25 02:12:49 +00:00
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{
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2002-03-21 18:49:23 +00:00
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const HEADER *hp;
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const u_char *cp;
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int n;
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1998-05-02 13:11:02 +00:00
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const u_char *eom, *erdata;
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2002-06-26 08:18:05 +00:00
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char *bp, *ep, **ap, **hap;
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int type, class, ancount, qdcount;
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1994-09-25 02:12:49 +00:00
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int haveanswer, had_error;
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int toobig = 0;
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1996-12-30 13:18:48 +00:00
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char tbuf[MAXDNAME];
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1996-01-13 09:03:58 +00:00
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const char *tname;
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2002-03-21 22:49:10 +00:00
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int (*name_ok)(const char *);
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1994-09-25 02:12:49 +00:00
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1996-01-13 09:03:58 +00:00
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tname = qname;
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2005-04-28 18:03:43 +00:00
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he->h_name = NULL;
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1994-09-25 02:12:49 +00:00
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eom = answer->buf + anslen;
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1996-08-29 20:08:19 +00:00
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switch (qtype) {
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case T_A:
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case T_AAAA:
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name_ok = res_hnok;
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break;
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case T_PTR:
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name_ok = res_dnok;
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break;
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default:
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2006-04-15 16:20:27 +00:00
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RES_SET_H_ERRNO(statp, NO_RECOVERY);
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return (-1); /* XXX should be abort(); */
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1996-08-29 20:08:19 +00:00
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}
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1994-09-25 02:12:49 +00:00
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/*
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* find first satisfactory answer
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*/
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hp = &answer->hdr;
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ancount = ntohs(hp->ancount);
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qdcount = ntohs(hp->qdcount);
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2005-04-28 18:03:43 +00:00
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bp = hed->hostbuf;
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ep = hed->hostbuf + sizeof hed->hostbuf;
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1998-05-02 13:11:02 +00:00
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cp = answer->buf;
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BOUNDED_INCR(HFIXEDSZ);
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1994-09-25 02:12:49 +00:00
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if (qdcount != 1) {
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2006-04-15 16:20:27 +00:00
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RES_SET_H_ERRNO(statp, NO_RECOVERY);
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return (-1);
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1994-09-25 02:12:49 +00:00
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}
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2002-06-26 08:18:05 +00:00
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n = dn_expand(answer->buf, eom, cp, bp, ep - bp);
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1996-08-29 20:08:19 +00:00
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if ((n < 0) || !(*name_ok)(bp)) {
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2006-04-15 16:20:27 +00:00
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RES_SET_H_ERRNO(statp, NO_RECOVERY);
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return (-1);
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1994-09-25 02:12:49 +00:00
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}
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1998-05-02 13:11:02 +00:00
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BOUNDED_INCR(n + QFIXEDSZ);
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1996-08-29 20:08:19 +00:00
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if (qtype == T_A || qtype == T_AAAA) {
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1994-09-25 02:12:49 +00:00
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/* res_send() has already verified that the query name is the
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* same as the one we sent; this just gets the expanded name
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* (i.e., with the succeeding search-domain tacked on).
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*/
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n = strlen(bp) + 1; /* for the \0 */
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1997-06-27 08:22:03 +00:00
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if (n >= MAXHOSTNAMELEN) {
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2006-04-15 16:20:27 +00:00
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RES_SET_H_ERRNO(statp, NO_RECOVERY);
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return (-1);
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1997-06-27 08:22:03 +00:00
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}
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2005-04-28 18:03:43 +00:00
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he->h_name = bp;
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1994-09-25 02:12:49 +00:00
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bp += n;
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/* The qname can be abbreviated, but h_name is now absolute. */
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2005-04-28 18:03:43 +00:00
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qname = he->h_name;
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1994-09-25 02:12:49 +00:00
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}
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2005-04-28 18:03:43 +00:00
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ap = hed->host_aliases;
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1994-09-25 02:12:49 +00:00
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*ap = NULL;
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2005-04-28 18:03:43 +00:00
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he->h_aliases = hed->host_aliases;
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hap = hed->h_addr_ptrs;
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1994-09-25 02:12:49 +00:00
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*hap = NULL;
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2005-04-28 18:03:43 +00:00
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he->h_addr_list = hed->h_addr_ptrs;
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1994-09-25 02:12:49 +00:00
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haveanswer = 0;
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had_error = 0;
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1996-11-01 06:25:43 +00:00
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_dns_ttl_ = -1;
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1994-09-25 02:12:49 +00:00
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while (ancount-- > 0 && cp < eom && !had_error) {
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2002-06-26 08:18:05 +00:00
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n = dn_expand(answer->buf, eom, cp, bp, ep - bp);
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1996-08-29 20:08:19 +00:00
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if ((n < 0) || !(*name_ok)(bp)) {
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1994-09-25 02:12:49 +00:00
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had_error++;
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continue;
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}
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cp += n; /* name */
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1998-05-02 13:11:02 +00:00
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BOUNDS_CHECK(cp, 3 * INT16SZ + INT32SZ);
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1994-09-25 02:12:49 +00:00
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type = _getshort(cp);
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cp += INT16SZ; /* type */
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class = _getshort(cp);
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1996-11-01 06:25:43 +00:00
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cp += INT16SZ; /* class */
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if (qtype == T_A && type == T_A)
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_dns_ttl_ = _getlong(cp);
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cp += INT32SZ; /* TTL */
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1994-09-25 02:12:49 +00:00
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n = _getshort(cp);
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cp += INT16SZ; /* len */
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1998-05-02 13:11:02 +00:00
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BOUNDS_CHECK(cp, n);
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erdata = cp + n;
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1996-08-29 20:08:19 +00:00
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if (class != C_IN) {
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1994-09-25 02:12:49 +00:00
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/* XXX - debug? syslog? */
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cp += n;
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continue; /* XXX - had_error++ ? */
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}
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1996-08-29 20:08:19 +00:00
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if ((qtype == T_A || qtype == T_AAAA) && type == T_CNAME) {
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2005-04-28 18:03:43 +00:00
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if (ap >= &hed->host_aliases[_MAXALIASES-1])
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1994-09-25 02:12:49 +00:00
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continue;
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n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
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1996-08-29 20:08:19 +00:00
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if ((n < 0) || !(*name_ok)(tbuf)) {
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1994-09-25 02:12:49 +00:00
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|
|
had_error++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
cp += n;
|
1998-05-02 13:11:02 +00:00
|
|
|
if (cp != erdata) {
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NO_RECOVERY);
|
|
|
|
return (-1);
|
1998-05-02 13:11:02 +00:00
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
/* Store alias. */
|
|
|
|
*ap++ = bp;
|
|
|
|
n = strlen(bp) + 1; /* for the \0 */
|
1997-06-27 08:22:03 +00:00
|
|
|
if (n >= MAXHOSTNAMELEN) {
|
|
|
|
had_error++;
|
|
|
|
continue;
|
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
bp += n;
|
|
|
|
/* Get canonical name. */
|
|
|
|
n = strlen(tbuf) + 1; /* for the \0 */
|
2002-06-26 08:18:05 +00:00
|
|
|
if (n > ep - bp || n >= MAXHOSTNAMELEN) {
|
1994-09-25 02:12:49 +00:00
|
|
|
had_error++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
strcpy(bp, tbuf);
|
2005-04-28 18:03:43 +00:00
|
|
|
he->h_name = bp;
|
1994-09-25 02:12:49 +00:00
|
|
|
bp += n;
|
|
|
|
continue;
|
|
|
|
}
|
1996-01-13 09:03:58 +00:00
|
|
|
if (qtype == T_PTR && type == T_CNAME) {
|
|
|
|
n = dn_expand(answer->buf, eom, cp, tbuf, sizeof tbuf);
|
1997-06-27 08:22:03 +00:00
|
|
|
if (n < 0 || !res_dnok(tbuf)) {
|
1996-01-13 09:03:58 +00:00
|
|
|
had_error++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
cp += n;
|
1998-05-02 13:11:02 +00:00
|
|
|
if (cp != erdata) {
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NO_RECOVERY);
|
|
|
|
return (-1);
|
1998-05-02 13:11:02 +00:00
|
|
|
}
|
1996-01-13 09:03:58 +00:00
|
|
|
/* Get canonical name. */
|
|
|
|
n = strlen(tbuf) + 1; /* for the \0 */
|
2002-06-26 08:18:05 +00:00
|
|
|
if (n > ep - bp || n >= MAXHOSTNAMELEN) {
|
1996-01-13 09:03:58 +00:00
|
|
|
had_error++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
strcpy(bp, tbuf);
|
|
|
|
tname = bp;
|
|
|
|
bp += n;
|
|
|
|
continue;
|
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
if (type != qtype) {
|
2009-02-08 16:58:05 +00:00
|
|
|
if (type != T_SIG && type != ns_t_dname)
|
1999-12-28 07:21:08 +00:00
|
|
|
syslog(LOG_NOTICE|LOG_AUTH,
|
1996-12-30 13:18:48 +00:00
|
|
|
"gethostby*.gethostanswer: asked for \"%s %s %s\", got type \"%s\"",
|
1999-12-28 07:21:08 +00:00
|
|
|
qname, p_class(C_IN), p_type(qtype),
|
|
|
|
p_type(type));
|
1994-09-25 02:12:49 +00:00
|
|
|
cp += n;
|
|
|
|
continue; /* XXX - had_error++ ? */
|
|
|
|
}
|
|
|
|
switch (type) {
|
|
|
|
case T_PTR:
|
1996-01-13 09:03:58 +00:00
|
|
|
if (strcasecmp(tname, bp) != 0) {
|
1994-09-25 02:12:49 +00:00
|
|
|
syslog(LOG_NOTICE|LOG_AUTH,
|
|
|
|
AskedForGot, qname, bp);
|
|
|
|
cp += n;
|
|
|
|
continue; /* XXX - had_error++ ? */
|
|
|
|
}
|
2002-06-26 08:18:05 +00:00
|
|
|
n = dn_expand(answer->buf, eom, cp, bp, ep - bp);
|
1996-08-29 20:08:19 +00:00
|
|
|
if ((n < 0) || !res_hnok(bp)) {
|
1994-09-25 02:12:49 +00:00
|
|
|
had_error++;
|
|
|
|
break;
|
|
|
|
}
|
1996-08-29 20:08:19 +00:00
|
|
|
#if MULTI_PTRS_ARE_ALIASES
|
1994-09-25 02:12:49 +00:00
|
|
|
cp += n;
|
1998-05-02 13:11:02 +00:00
|
|
|
if (cp != erdata) {
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NO_RECOVERY);
|
|
|
|
return (-1);
|
1998-05-02 13:11:02 +00:00
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
if (!haveanswer)
|
2005-04-28 18:03:43 +00:00
|
|
|
he->h_name = bp;
|
|
|
|
else if (ap < &hed->host_aliases[_MAXALIASES-1])
|
1994-09-25 02:12:49 +00:00
|
|
|
*ap++ = bp;
|
|
|
|
else
|
|
|
|
n = -1;
|
|
|
|
if (n != -1) {
|
|
|
|
n = strlen(bp) + 1; /* for the \0 */
|
1997-06-27 08:22:03 +00:00
|
|
|
if (n >= MAXHOSTNAMELEN) {
|
|
|
|
had_error++;
|
|
|
|
break;
|
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
bp += n;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
#else
|
2005-04-28 18:03:43 +00:00
|
|
|
he->h_name = bp;
|
2006-04-15 16:20:27 +00:00
|
|
|
if (statp->options & RES_USE_INET6) {
|
1996-08-29 20:08:19 +00:00
|
|
|
n = strlen(bp) + 1; /* for the \0 */
|
1997-06-27 08:22:03 +00:00
|
|
|
if (n >= MAXHOSTNAMELEN) {
|
|
|
|
had_error++;
|
|
|
|
break;
|
|
|
|
}
|
1996-08-29 20:08:19 +00:00
|
|
|
bp += n;
|
2005-04-28 18:52:40 +00:00
|
|
|
_map_v4v6_hostent(he, &bp, ep);
|
1996-08-29 20:08:19 +00:00
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_SUCCESS);
|
|
|
|
return (0);
|
1994-09-25 02:12:49 +00:00
|
|
|
#endif
|
|
|
|
case T_A:
|
1996-08-29 20:08:19 +00:00
|
|
|
case T_AAAA:
|
2005-04-28 18:03:43 +00:00
|
|
|
if (strcasecmp(he->h_name, bp) != 0) {
|
1994-09-25 02:12:49 +00:00
|
|
|
syslog(LOG_NOTICE|LOG_AUTH,
|
2005-04-28 18:03:43 +00:00
|
|
|
AskedForGot, he->h_name, bp);
|
1994-09-25 02:12:49 +00:00
|
|
|
cp += n;
|
|
|
|
continue; /* XXX - had_error++ ? */
|
|
|
|
}
|
2005-04-28 18:03:43 +00:00
|
|
|
if (n != he->h_length) {
|
1996-10-01 03:45:06 +00:00
|
|
|
cp += n;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (!haveanswer) {
|
2002-03-21 18:49:23 +00:00
|
|
|
int nn;
|
1994-09-25 02:12:49 +00:00
|
|
|
|
2005-04-28 18:03:43 +00:00
|
|
|
he->h_name = bp;
|
1994-09-25 02:12:49 +00:00
|
|
|
nn = strlen(bp) + 1; /* for the \0 */
|
|
|
|
bp += nn;
|
|
|
|
}
|
|
|
|
|
2002-06-26 06:23:22 +00:00
|
|
|
bp += sizeof(align) - ((u_long)bp % sizeof(align));
|
1994-09-25 02:12:49 +00:00
|
|
|
|
2002-06-26 08:18:05 +00:00
|
|
|
if (bp + n >= ep) {
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("size (%d) too big\n", n, statp);
|
1994-09-25 02:12:49 +00:00
|
|
|
had_error++;
|
|
|
|
continue;
|
|
|
|
}
|
2005-04-28 18:03:43 +00:00
|
|
|
if (hap >= &hed->h_addr_ptrs[_MAXADDRS-1]) {
|
1995-08-20 20:03:06 +00:00
|
|
|
if (!toobig++)
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("Too many addresses (%d)\n",
|
2006-04-15 16:20:27 +00:00
|
|
|
_MAXADDRS, statp);
|
1994-09-25 02:12:49 +00:00
|
|
|
cp += n;
|
|
|
|
continue;
|
|
|
|
}
|
2005-04-29 19:55:23 +00:00
|
|
|
memcpy(*hap++ = bp, cp, n);
|
1994-09-25 02:12:49 +00:00
|
|
|
bp += n;
|
|
|
|
cp += n;
|
1998-05-02 13:11:02 +00:00
|
|
|
if (cp != erdata) {
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NO_RECOVERY);
|
|
|
|
return (-1);
|
1998-05-02 13:11:02 +00:00
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
break;
|
|
|
|
default:
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("Impossible condition (type=%d)\n", type,
|
2006-04-15 16:20:27 +00:00
|
|
|
statp);
|
|
|
|
RES_SET_H_ERRNO(statp, NO_RECOVERY);
|
|
|
|
return (-1);
|
1996-12-30 13:18:48 +00:00
|
|
|
/* BIND has abort() here, too risky on bad data */
|
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
if (!had_error)
|
|
|
|
haveanswer++;
|
1996-12-30 13:18:48 +00:00
|
|
|
}
|
1994-09-25 02:12:49 +00:00
|
|
|
if (haveanswer) {
|
|
|
|
*ap = NULL;
|
|
|
|
*hap = NULL;
|
|
|
|
# if defined(RESOLVSORT)
|
|
|
|
/*
|
|
|
|
* Note: we sort even if host can take only one address
|
|
|
|
* in its return structures - should give it the "best"
|
|
|
|
* address in that case, not some random one
|
|
|
|
*/
|
2006-04-15 16:20:27 +00:00
|
|
|
if (statp->nsort && haveanswer > 1 && qtype == T_A)
|
|
|
|
addrsort(hed->h_addr_ptrs, haveanswer, statp);
|
1994-09-25 02:12:49 +00:00
|
|
|
# endif /*RESOLVSORT*/
|
2005-04-28 18:03:43 +00:00
|
|
|
if (!he->h_name) {
|
1994-09-25 02:12:49 +00:00
|
|
|
n = strlen(qname) + 1; /* for the \0 */
|
2002-06-26 08:18:05 +00:00
|
|
|
if (n > ep - bp || n >= MAXHOSTNAMELEN)
|
1997-06-27 08:22:03 +00:00
|
|
|
goto no_recovery;
|
1994-09-25 02:12:49 +00:00
|
|
|
strcpy(bp, qname);
|
2005-04-28 18:03:43 +00:00
|
|
|
he->h_name = bp;
|
1996-08-29 20:08:19 +00:00
|
|
|
bp += n;
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
if (statp->options & RES_USE_INET6)
|
2005-04-28 18:52:40 +00:00
|
|
|
_map_v4v6_hostent(he, &bp, ep);
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_SUCCESS);
|
|
|
|
return (0);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
1997-06-27 08:22:03 +00:00
|
|
|
no_recovery:
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NO_RECOVERY);
|
|
|
|
return (-1);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
|
|
|
|
2005-04-28 18:03:43 +00:00
|
|
|
/* XXX: for async DNS resolver in ypserv */
|
1996-12-22 22:05:43 +00:00
|
|
|
struct hostent *
|
2005-04-28 18:03:43 +00:00
|
|
|
__dns_getanswer(const char *answer, int anslen, const char *qname, int qtype)
|
1996-12-22 22:05:43 +00:00
|
|
|
{
|
2006-04-15 16:20:27 +00:00
|
|
|
struct hostent *he;
|
|
|
|
struct hostent_data *hed;
|
2005-04-28 18:03:43 +00:00
|
|
|
int error;
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
res_state statp;
|
2005-04-28 18:03:43 +00:00
|
|
|
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
statp = __res_state();
|
2006-04-15 16:20:27 +00:00
|
|
|
if ((he = __hostent_init()) == NULL ||
|
|
|
|
(hed = __hostent_data_init()) == NULL) {
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
2006-04-15 16:20:27 +00:00
|
|
|
return (NULL);
|
2005-04-28 18:03:43 +00:00
|
|
|
}
|
|
|
|
switch (qtype) {
|
1996-12-24 02:10:24 +00:00
|
|
|
case T_AAAA:
|
2006-04-15 16:20:27 +00:00
|
|
|
he->h_addrtype = AF_INET6;
|
|
|
|
he->h_length = NS_IN6ADDRSZ;
|
1996-12-24 02:10:24 +00:00
|
|
|
break;
|
|
|
|
case T_A:
|
|
|
|
default:
|
2006-04-15 16:20:27 +00:00
|
|
|
he->h_addrtype = AF_INET;
|
|
|
|
he->h_length = NS_INADDRSZ;
|
1996-12-24 02:10:24 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2005-04-28 18:03:43 +00:00
|
|
|
error = gethostanswer((const querybuf *)answer, anslen, qname, qtype,
|
2006-04-15 16:20:27 +00:00
|
|
|
he, hed, statp);
|
|
|
|
return (error == 0) ? he : NULL;
|
1996-12-22 22:05:43 +00:00
|
|
|
}
|
|
|
|
|
Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
|
|
|
int
|
|
|
|
_dns_gethostbyname(void *rval, void *cb_data, va_list ap)
|
|
|
|
{
|
1994-09-25 02:12:49 +00:00
|
|
|
const char *name;
|
1996-08-29 20:08:19 +00:00
|
|
|
int af;
|
2006-04-15 16:20:27 +00:00
|
|
|
char *buffer;
|
|
|
|
size_t buflen;
|
|
|
|
int *errnop, *h_errnop;
|
|
|
|
struct hostent *hptr, he;
|
2005-04-28 18:03:43 +00:00
|
|
|
struct hostent_data *hed;
|
2002-10-03 17:25:33 +00:00
|
|
|
querybuf *buf;
|
2006-04-15 16:20:27 +00:00
|
|
|
int n, type, error;
|
|
|
|
res_state statp;
|
1994-09-25 02:12:49 +00:00
|
|
|
|
Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
|
|
|
name = va_arg(ap, const char *);
|
|
|
|
af = va_arg(ap, int);
|
2006-04-15 16:20:27 +00:00
|
|
|
hptr = va_arg(ap, struct hostent *);
|
|
|
|
buffer = va_arg(ap, char *);
|
|
|
|
buflen = va_arg(ap, size_t);
|
|
|
|
errnop = va_arg(ap, int *);
|
|
|
|
h_errnop = va_arg(ap, int *);
|
|
|
|
|
|
|
|
*((struct hostent **)rval) = NULL;
|
|
|
|
|
|
|
|
statp = __res_state();
|
|
|
|
if ((hed = __hostent_data_init()) == NULL) {
|
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_NOTFOUND);
|
|
|
|
}
|
Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
|
|
|
|
2006-04-15 16:20:27 +00:00
|
|
|
he.h_addrtype = af;
|
1996-08-29 20:08:19 +00:00
|
|
|
switch (af) {
|
|
|
|
case AF_INET:
|
2006-04-15 16:20:27 +00:00
|
|
|
he.h_length = NS_INADDRSZ;
|
1996-08-29 20:08:19 +00:00
|
|
|
type = T_A;
|
|
|
|
break;
|
|
|
|
case AF_INET6:
|
2006-04-15 16:20:27 +00:00
|
|
|
he.h_length = NS_IN6ADDRSZ;
|
1996-08-29 20:08:19 +00:00
|
|
|
type = T_AAAA;
|
|
|
|
break;
|
|
|
|
default:
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
1996-08-29 20:08:19 +00:00
|
|
|
errno = EAFNOSUPPORT;
|
2006-04-15 16:20:27 +00:00
|
|
|
return (NS_UNAVAIL);
|
1996-08-29 20:08:19 +00:00
|
|
|
}
|
|
|
|
|
2002-10-03 17:25:33 +00:00
|
|
|
if ((buf = malloc(sizeof(*buf))) == NULL) {
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_NOTFOUND);
|
2002-10-03 17:25:33 +00:00
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
n = res_nsearch(statp, name, C_IN, type, buf->buf, sizeof(buf->buf));
|
2002-09-15 16:51:09 +00:00
|
|
|
if (n < 0) {
|
2002-10-03 17:25:33 +00:00
|
|
|
free(buf);
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("res_nsearch failed (%d)\n", n, statp);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
2010-08-15 16:28:08 +00:00
|
|
|
return (NS_NOTFOUND);
|
2002-10-03 17:25:33 +00:00
|
|
|
} else if (n > sizeof(buf->buf)) {
|
|
|
|
free(buf);
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("static buffer is too small (%d)\n", n, statp);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
2010-08-15 16:28:08 +00:00
|
|
|
return (NS_UNAVAIL);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
error = gethostanswer(buf, n, name, type, &he, hed, statp);
|
2002-10-03 17:25:33 +00:00
|
|
|
free(buf);
|
2006-04-15 16:20:27 +00:00
|
|
|
if (error != 0) {
|
|
|
|
*h_errnop = statp->res_h_errno;
|
2010-08-15 16:28:08 +00:00
|
|
|
switch (statp->res_h_errno) {
|
|
|
|
case HOST_NOT_FOUND:
|
|
|
|
return (NS_NOTFOUND);
|
|
|
|
case TRY_AGAIN:
|
|
|
|
return (NS_TRYAGAIN);
|
|
|
|
default:
|
|
|
|
return (NS_UNAVAIL);
|
|
|
|
}
|
|
|
|
/*NOTREACHED*/
|
2006-04-15 16:20:27 +00:00
|
|
|
}
|
|
|
|
if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
|
2010-08-13 06:39:54 +00:00
|
|
|
*errnop = errno;
|
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
2010-08-13 06:39:54 +00:00
|
|
|
return (NS_RETURN);
|
2006-04-15 16:20:27 +00:00
|
|
|
}
|
2010-08-13 06:39:54 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_SUCCESS);
|
2006-04-15 16:20:27 +00:00
|
|
|
*((struct hostent **)rval) = hptr;
|
|
|
|
return (NS_SUCCESS);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
|
|
|
|
Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
|
|
|
int
|
|
|
|
_dns_gethostbyaddr(void *rval, void *cb_data, va_list ap)
|
|
|
|
{
|
2006-05-12 15:37:23 +00:00
|
|
|
const void *addr;
|
|
|
|
socklen_t len;
|
|
|
|
int af;
|
2006-04-15 16:20:27 +00:00
|
|
|
char *buffer;
|
|
|
|
size_t buflen;
|
|
|
|
int *errnop, *h_errnop;
|
2006-05-12 15:37:23 +00:00
|
|
|
const u_char *uaddr;
|
2006-04-15 16:20:27 +00:00
|
|
|
struct hostent *hptr, he;
|
2005-04-28 18:03:43 +00:00
|
|
|
struct hostent_data *hed;
|
2006-04-15 16:20:27 +00:00
|
|
|
int n;
|
2002-10-03 17:25:33 +00:00
|
|
|
querybuf *buf;
|
1996-08-29 20:08:19 +00:00
|
|
|
char qbuf[MAXDNAME+1], *qp;
|
2006-04-15 16:20:27 +00:00
|
|
|
res_state statp;
|
1995-08-20 20:03:06 +00:00
|
|
|
#ifdef SUNSECURITY
|
2005-04-28 18:03:43 +00:00
|
|
|
struct hostdata rhd;
|
|
|
|
struct hostent *rhe;
|
1995-08-20 20:03:06 +00:00
|
|
|
char **haddr;
|
|
|
|
u_long old_options;
|
2005-04-29 12:01:36 +00:00
|
|
|
char hname2[MAXDNAME+1], numaddr[46];
|
2006-04-15 16:20:27 +00:00
|
|
|
int ret_h_error;
|
1995-08-20 20:03:06 +00:00
|
|
|
#endif /*SUNSECURITY*/
|
Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
|
|
|
|
2006-05-12 15:37:23 +00:00
|
|
|
addr = va_arg(ap, const void *);
|
|
|
|
len = va_arg(ap, socklen_t);
|
Add nsswitch support. By creating an /etc/nsswitch.conf file, you can
configure FreeBSD so that various databases such as passwd and group can be
looked up using flat files, NIS, or Hesiod.
= Hesiod has been added to libc (see hesiod(3)).
= A library routine for parsing nsswitch.conf and invoking callback
functions as specified has been added to libc (see nsdispatch(3)).
= The following C library functions have been modified to use nsdispatch:
. getgrent, getgrnam, getgrgid
. getpwent, getpwnam, getpwuid
. getusershell
. getaddrinfo
. gethostbyname, gethostbyname2, gethostbyaddr
. getnetbyname, getnetbyaddr
. getipnodebyname, getipnodebyaddr, getnodebyname, getnodebyaddr
= host.conf has been removed from src/etc. rc.network has been modified
to warn that host.conf is no longer used at boot time. In addition, if
there is a host.conf but no nsswitch.conf, the latter is created at boot
time from the former.
Obtained from: NetBSD
2000-09-06 18:16:48 +00:00
|
|
|
af = va_arg(ap, int);
|
2006-04-15 16:20:27 +00:00
|
|
|
hptr = va_arg(ap, struct hostent *);
|
|
|
|
buffer = va_arg(ap, char *);
|
|
|
|
buflen = va_arg(ap, size_t);
|
|
|
|
errnop = va_arg(ap, int *);
|
|
|
|
h_errnop = va_arg(ap, int *);
|
2006-05-12 15:37:23 +00:00
|
|
|
uaddr = (const u_char *)addr;
|
2006-04-15 16:20:27 +00:00
|
|
|
|
|
|
|
*((struct hostent **)rval) = NULL;
|
|
|
|
|
|
|
|
statp = __res_state();
|
|
|
|
if ((hed = __hostent_data_init()) == NULL) {
|
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_NOTFOUND);
|
|
|
|
}
|
2005-04-28 18:03:43 +00:00
|
|
|
|
1996-08-29 20:08:19 +00:00
|
|
|
switch (af) {
|
|
|
|
case AF_INET:
|
|
|
|
(void) sprintf(qbuf, "%u.%u.%u.%u.in-addr.arpa",
|
|
|
|
(uaddr[3] & 0xff),
|
|
|
|
(uaddr[2] & 0xff),
|
|
|
|
(uaddr[1] & 0xff),
|
|
|
|
(uaddr[0] & 0xff));
|
|
|
|
break;
|
|
|
|
case AF_INET6:
|
|
|
|
qp = qbuf;
|
2006-04-15 16:20:27 +00:00
|
|
|
for (n = NS_IN6ADDRSZ - 1; n >= 0; n--) {
|
1996-08-29 20:08:19 +00:00
|
|
|
qp += SPRINTF((qp, "%x.%x.",
|
|
|
|
uaddr[n] & 0xf,
|
|
|
|
(uaddr[n] >> 4) & 0xf));
|
|
|
|
}
|
2003-05-01 19:03:14 +00:00
|
|
|
strlcat(qbuf, "ip6.arpa", sizeof(qbuf));
|
1996-08-29 20:08:19 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
abort();
|
|
|
|
}
|
2002-10-03 17:25:33 +00:00
|
|
|
if ((buf = malloc(sizeof(*buf))) == NULL) {
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
2002-10-03 17:25:33 +00:00
|
|
|
return NS_NOTFOUND;
|
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
n = res_nquery(statp, qbuf, C_IN, T_PTR, (u_char *)buf->buf,
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
sizeof buf->buf);
|
1994-09-25 02:12:49 +00:00
|
|
|
if (n < 0) {
|
2002-10-03 17:25:33 +00:00
|
|
|
free(buf);
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("res_nquery failed (%d)\n", n, statp);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_UNAVAIL);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
2002-10-03 17:25:33 +00:00
|
|
|
if (n > sizeof buf->buf) {
|
|
|
|
free(buf);
|
2016-05-10 07:45:44 +00:00
|
|
|
dbg_printf("static buffer is too small (%d)\n", n, statp);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_UNAVAIL);
|
2000-02-16 04:39:00 +00:00
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
if (gethostanswer(buf, n, qbuf, T_PTR, &he, hed, statp) != 0) {
|
2002-10-03 17:25:33 +00:00
|
|
|
free(buf);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
2010-08-15 16:28:08 +00:00
|
|
|
switch (statp->res_h_errno) {
|
|
|
|
case HOST_NOT_FOUND:
|
|
|
|
return (NS_NOTFOUND);
|
|
|
|
case TRY_AGAIN:
|
|
|
|
return (NS_TRYAGAIN);
|
|
|
|
default:
|
|
|
|
return (NS_UNAVAIL);
|
|
|
|
}
|
|
|
|
/*NOTREACHED*/
|
2002-10-03 17:25:33 +00:00
|
|
|
}
|
|
|
|
free(buf);
|
1995-08-20 20:03:06 +00:00
|
|
|
#ifdef SUNSECURITY
|
1996-08-29 20:08:19 +00:00
|
|
|
if (af == AF_INET) {
|
|
|
|
/*
|
|
|
|
* turn off search as the name should be absolute,
|
|
|
|
* 'localhost' should be matched by defnames
|
|
|
|
*/
|
2006-04-15 16:20:27 +00:00
|
|
|
strncpy(hname2, he.h_name, MAXDNAME);
|
1996-08-29 20:08:19 +00:00
|
|
|
hname2[MAXDNAME] = '\0';
|
2006-04-15 16:20:27 +00:00
|
|
|
old_options = statp->options;
|
|
|
|
statp->options &= ~RES_DNSRCH;
|
|
|
|
statp->options |= RES_DEFNAMES;
|
2005-04-28 18:03:43 +00:00
|
|
|
memset(&rhd, 0, sizeof rhd);
|
2006-04-15 16:20:27 +00:00
|
|
|
rhe = gethostbyname_r(hname2, &rhd.host, &rhd.data,
|
|
|
|
sizeof(rhd.data), &ret_h_error);
|
|
|
|
if (rhe == NULL) {
|
2005-04-29 12:01:36 +00:00
|
|
|
if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
|
|
|
|
strlcpy(numaddr, "UNKNOWN", sizeof(numaddr));
|
1995-08-20 20:03:06 +00:00
|
|
|
syslog(LOG_NOTICE|LOG_AUTH,
|
|
|
|
"gethostbyaddr: No A record for %s (verifying [%s])",
|
2005-04-29 12:01:36 +00:00
|
|
|
hname2, numaddr);
|
2006-04-15 16:20:27 +00:00
|
|
|
statp->options = old_options;
|
|
|
|
RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_NOTFOUND);
|
1996-08-29 20:08:19 +00:00
|
|
|
}
|
2006-04-15 16:20:27 +00:00
|
|
|
statp->options = old_options;
|
2005-04-28 18:03:43 +00:00
|
|
|
for (haddr = rhe->h_addr_list; *haddr; haddr++)
|
2006-04-15 16:20:27 +00:00
|
|
|
if (!memcmp(*haddr, addr, NS_INADDRSZ))
|
1995-08-20 20:03:06 +00:00
|
|
|
break;
|
1996-08-29 20:08:19 +00:00
|
|
|
if (!*haddr) {
|
2005-04-29 12:01:36 +00:00
|
|
|
if (inet_ntop(af, addr, numaddr, sizeof(numaddr)) == NULL)
|
|
|
|
strlcpy(numaddr, "UNKNOWN", sizeof(numaddr));
|
1995-08-20 20:03:06 +00:00
|
|
|
syslog(LOG_NOTICE|LOG_AUTH,
|
|
|
|
"gethostbyaddr: A record of %s != PTR record [%s]",
|
2005-04-29 12:01:36 +00:00
|
|
|
hname2, numaddr);
|
2006-04-15 16:20:27 +00:00
|
|
|
RES_SET_H_ERRNO(statp, HOST_NOT_FOUND);
|
|
|
|
*h_errnop = statp->res_h_errno;
|
|
|
|
return (NS_NOTFOUND);
|
1996-08-29 20:08:19 +00:00
|
|
|
}
|
1995-08-20 20:03:06 +00:00
|
|
|
}
|
|
|
|
#endif /*SUNSECURITY*/
|
2006-04-15 16:20:27 +00:00
|
|
|
he.h_addrtype = af;
|
|
|
|
he.h_length = len;
|
2005-04-29 19:55:23 +00:00
|
|
|
memcpy(hed->host_addr, uaddr, len);
|
2005-04-28 18:03:43 +00:00
|
|
|
hed->h_addr_ptrs[0] = (char *)hed->host_addr;
|
|
|
|
hed->h_addr_ptrs[1] = NULL;
|
2006-04-15 16:20:27 +00:00
|
|
|
if (af == AF_INET && (statp->options & RES_USE_INET6)) {
|
2005-04-28 18:03:43 +00:00
|
|
|
_map_v4v6_address((char*)hed->host_addr, (char*)hed->host_addr);
|
2006-04-15 16:20:27 +00:00
|
|
|
he.h_addrtype = AF_INET6;
|
|
|
|
he.h_length = NS_IN6ADDRSZ;
|
|
|
|
}
|
|
|
|
if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
|
2010-08-13 06:39:54 +00:00
|
|
|
*errnop = errno;
|
|
|
|
RES_SET_H_ERRNO(statp, NETDB_INTERNAL);
|
2006-04-15 16:20:27 +00:00
|
|
|
*h_errnop = statp->res_h_errno;
|
2010-08-13 06:39:54 +00:00
|
|
|
return (NS_RETURN);
|
1996-08-29 20:08:19 +00:00
|
|
|
}
|
2010-08-13 06:39:54 +00:00
|
|
|
RES_SET_H_ERRNO(statp, NETDB_SUCCESS);
|
2006-04-15 16:20:27 +00:00
|
|
|
*((struct hostent **)rval) = hptr;
|
|
|
|
return (NS_SUCCESS);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
|
|
|
|
1996-01-13 09:03:58 +00:00
|
|
|
#ifdef RESOLVSORT
|
|
|
|
static void
|
2006-04-15 16:20:27 +00:00
|
|
|
addrsort(char **ap, int num, res_state res)
|
1996-01-13 09:03:58 +00:00
|
|
|
{
|
|
|
|
int i, j;
|
|
|
|
char **p;
|
2005-04-28 18:03:43 +00:00
|
|
|
short aval[_MAXADDRS];
|
1996-01-13 09:03:58 +00:00
|
|
|
int needsort = 0;
|
|
|
|
|
|
|
|
p = ap;
|
|
|
|
for (i = 0; i < num; i++, p++) {
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
for (j = 0 ; (unsigned)j < res->nsort; j++)
|
|
|
|
if (res->sort_list[j].addr.s_addr ==
|
|
|
|
(((struct in_addr *)(*p))->s_addr & res->sort_list[j].mask))
|
1996-01-13 09:03:58 +00:00
|
|
|
break;
|
|
|
|
aval[i] = j;
|
|
|
|
if (needsort == 0 && i > 0 && j < aval[i-1])
|
|
|
|
needsort = i;
|
|
|
|
}
|
|
|
|
if (!needsort)
|
|
|
|
return;
|
|
|
|
|
|
|
|
while (needsort < num) {
|
|
|
|
for (j = needsort - 1; j >= 0; j--) {
|
|
|
|
if (aval[j] > aval[j+1]) {
|
|
|
|
char *hp;
|
|
|
|
|
|
|
|
i = aval[j];
|
|
|
|
aval[j] = aval[j+1];
|
|
|
|
aval[j+1] = i;
|
|
|
|
|
|
|
|
hp = ap[j];
|
|
|
|
ap[j] = ap[j+1];
|
|
|
|
ap[j+1] = hp;
|
|
|
|
|
|
|
|
} else
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
needsort++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
|
1994-09-25 02:12:49 +00:00
|
|
|
void
|
2006-04-15 16:20:27 +00:00
|
|
|
_sethostdnsent(int stayopen)
|
1994-09-25 02:12:49 +00:00
|
|
|
{
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
res_state statp;
|
|
|
|
|
|
|
|
statp = __res_state();
|
|
|
|
if ((statp->options & RES_INIT) == 0 && res_ninit(statp) == -1)
|
1996-01-13 09:03:58 +00:00
|
|
|
return;
|
1994-09-25 02:12:49 +00:00
|
|
|
if (stayopen)
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
statp->options |= RES_STAYOPEN | RES_USEVC;
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2015-09-20 21:21:01 +00:00
|
|
|
_endhostdnsent(void)
|
1994-09-25 02:12:49 +00:00
|
|
|
{
|
Update the resolver in libc to BIND9's one.
Since, res_sendsigned(3) and the friends use MD5 functions, it is
hard to include them without having MD5 functions in libc. So,
res_sendsigned(3) is not merged into libc.
Since, res_update(3) in BIND9 is not binary compatible with our
res_update(3), res_update(3) is leaved as is, except some
necessary modifications.
The res_update(3) and the friends are not essential part of the
resolver. They are not defined in resolv.h but defined in
res_update.h separately in BIND9. Further, they are not called from
our tree. So, I hide them from our resolv.h, but leave them only
for binary backward compatibility (perhaps, no one calls them).
Since, struct __res_state_ext is not exposed in BIND9, I hide it
from our resolv.h. And, global variable _res_ext is removed. It
breaks binary backward compatibility. But, since it is not used from
outside of our libc, I think it is safe.
Reviewed by: arch@ (no objection)
2006-03-21 16:11:11 +00:00
|
|
|
res_state statp;
|
|
|
|
|
|
|
|
statp = __res_state();
|
|
|
|
statp->options &= ~(RES_STAYOPEN | RES_USEVC);
|
|
|
|
res_nclose(statp);
|
1994-09-25 02:12:49 +00:00
|
|
|
}
|