1985 lines
47 KiB
C
1985 lines
47 KiB
C
/*
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* The original version of xfer by Kevin Dunlap.
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* Completed and integrated with named by David Waitzman
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* (dwaitzman@bbn.com) 3/14/88.
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* Modified by M. Karels and O. Kure 10-88.
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* Modified extensively since then by just about everybody.
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*/
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/*
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* ++Copyright++ 1988, 1990
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* -
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* Copyright (c) 1988, 1990
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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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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*
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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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*
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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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* Portions Copyright (c) 1995 by International Business Machines, Inc.
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*
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* International Business Machines, Inc. (hereinafter called IBM) grants
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* permission under its copyrights to use, copy, modify, and distribute this
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* Software with or without fee, provided that the above copyright notice and
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* all paragraphs of this notice appear in all copies, and that the name of IBM
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* not be used in connection with the marketing of any product incorporating
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* the Software or modifications thereof, without specific, written prior
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* permission.
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*
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* To the extent it has a right to do so, IBM grants an immunity from suit
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* under its patents, if any, for the use, sale or manufacture of products to
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* the extent that such products are used for performing Domain Name System
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* dynamic updates in TCP/IP networks by means of the Software. No immunity is
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* granted for any product per se or for any other function of any product.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", AND IBM DISCLAIMS ALL WARRANTIES,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE. IN NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL,
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* DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER ARISING
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* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE, EVEN
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* IF IBM IS APPRISED OF THE POSSIBILITY OF SUCH DAMAGES.
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* --Copyright--
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*/
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#if !defined(lint) && !defined(SABER)
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char copyright[] =
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"@(#) Copyright (c) 1988, 1990 The Regents of the University of California.\n\
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portions Copyright (c) 1993 Digital Equipment Corporation\n\
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All rights reserved.\n";
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#endif /* not lint */
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#if !defined(lint) && !defined(SABER)
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static char sccsid[] = "@(#)named-xfer.c 4.18 (Berkeley) 3/7/91";
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static char rcsid[] = "$Id: named-xfer.c,v 8.23 1997/06/01 20:34:34 vixie Exp $";
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#if defined(__osf__)
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# include <sys/mbuf.h>
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# include <net/route.h>
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#endif
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#if defined(_AIX)
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# include <sys/time.h>
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# define TIME_H_INCLUDED
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#endif
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#include <net/if.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <arpa/nameser.h>
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#include <errno.h>
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#include <resolv.h>
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#include <stdio.h>
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#include <syslog.h>
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#if !defined(SVR4) || !defined(sun)
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# include <math.h>
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#endif
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#include <ctype.h>
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#include <signal.h>
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#define MAIN_PROGRAM
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#include "named.h"
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#undef MAIN_PROGRAM
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#ifndef LOG_PERROR
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# define LOG_PERROR 0
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#endif
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static struct zoneinfo zone; /* zone information */
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static char ddtfilename[] = _PATH_TMPXFER,
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*ddtfile = ddtfilename,
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*tmpname,
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*domain; /* domain being xfered */
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static int quiet = 0,
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read_interrupted = 0,
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curclass,
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domain_len; /* strlen(domain) */
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static FILE *fp = NULL,
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*dbfp = NULL;
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static char *ProgName;
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static void usage __P((const char *));
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static int getzone __P((struct zoneinfo *, u_int32_t, int)),
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print_output __P((struct zoneinfo *, u_int32_t,
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u_char *, int, u_char *)),
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netread __P((int, char *, int, int));
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static SIG_FN read_alarm __P(());
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static SIG_FN term_handler __P(());
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static const char *soa_zinfo __P((struct zoneinfo *, u_char *, u_char*));
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struct zoneinfo zp_start, zp_finish;
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extern char *optarg;
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extern int optind, getopt();
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void
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cleanup_for_exit() {
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#ifdef DEBUG
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if (!debug)
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#endif
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(void) unlink(tmpname);
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}
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void
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register struct zoneinfo *zp;
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register struct hostent *hp;
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char *dbfile = NULL, *tracefile = NULL, *tm = NULL;
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int dbfd, ddtd, result, c, fd, closed = 0;
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u_int32_t serial_no = 0;
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u_int16_t port = htons(NAMESERVER_PORT);
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struct stat statbuf;
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#ifdef STUBS
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int stub_only = 0;
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#endif
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#ifdef GEN_AXFR
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int class = C_IN;
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#endif
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if (ProgName = strrchr(argv[0], '/'))
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ProgName++;
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else
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ProgName = argv[0];
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(void) umask(022);
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/* this is a hack; closing everything in the parent is hard. */
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for (fd = getdtablesize()-1; fd > STDERR_FILENO; fd--)
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closed += (close(fd) == 0);
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#ifdef RENICE
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nice(-40); /* this is the recommended procedure to */
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nice(20); /* reset the priority of the current process */
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nice(0); /* to "normal" (== 0) - see nice(3) */
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#endif
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#ifdef LOG_DAEMON
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openlog(ProgName, LOG_PID|LOG_CONS|LOG_PERROR, LOGFAC);
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#else
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openlog(ProgName, LOG_PID);
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#endif
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#ifdef STUBS
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while ((c = getopt(argc, argv, "C:d:l:s:t:z:f:p:P:qS")) != EOF)
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#else
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while ((c = getopt(argc, argv, "C:d:l:s:t:z:f:p:P:q")) != EOF)
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#endif
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switch (c) {
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#ifdef GEN_AXFR
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case 'C':
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class = get_class(optarg);
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break;
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#endif
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case 'd':
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#ifdef DEBUG
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debug = atoi(optarg);
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#endif
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break;
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case 'l':
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ddtfile = (char *)malloc(strlen(optarg) +
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sizeof(".XXXXXX") + 1);
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if (!ddtfile)
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panic(errno, "malloc(ddtfile)");
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#ifdef SHORT_FNAMES
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filenamecpy(ddtfile, optarg);
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#else
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(void) strcpy(ddtfile, optarg);
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#endif /* SHORT_FNAMES */
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(void) strcat(ddtfile, ".XXXXXX");
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break;
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case 's':
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serial_no = strtoul(optarg, (char **)NULL, 10);
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break;
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case 't':
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tracefile = optarg;
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break;
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case 'z': /* zone == domain */
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domain = optarg;
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domain_len = strlen(domain);
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while ((domain_len > 0) &&
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(domain[domain_len-1] == '.'))
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domain[--domain_len] = '\0';
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break;
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case 'f':
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dbfile = optarg;
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tmpname = (char *)malloc((unsigned)strlen(optarg) +
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sizeof(".XXXXXX") + 1);
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if (!tmpname)
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panic(errno, "malloc(tmpname)");
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#ifdef SHORT_FNAMES
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filenamecpy(tmpname, optarg);
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#else
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(void) strcpy(tmpname, optarg);
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#endif /* SHORT_FNAMES */
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break;
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case 'p':
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port = htons((u_int16_t)atoi(optarg));
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break;
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case 'P':
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port = (u_int16_t)atoi(optarg);
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break;
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#ifdef STUBS
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case 'S':
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stub_only = 1;
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break;
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#endif
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case 'q':
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quiet++;
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break;
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case '?':
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default:
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usage("unrecognized argument");
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/* NOTREACHED */
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}
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if (!domain || !dbfile || optind >= argc) {
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if (!domain)
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usage("no domain");
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if (!dbfile)
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usage("no dbfile");
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if (optind >= argc)
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usage("not enough arguments");
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/* NOTREACHED */
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}
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if (stat(dbfile, &statbuf) != -1 &&
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!S_ISREG(statbuf.st_mode) &&
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!S_ISFIFO(statbuf.st_mode))
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usage("dbfile must be a regular file or FIFO");
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if (tracefile && (fp = fopen(tracefile, "w")) == NULL)
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perror(tracefile);
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(void) strcat(tmpname, ".XXXXXX");
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/* tmpname is now something like "/etc/named/named.bu.db.XXXXXX" */
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if ((dbfd = mkstemp(tmpname)) == -1) {
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perror(tmpname);
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if (!quiet)
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syslog(LOG_ERR, "can't make tmpfile (%s): %m\n",
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tmpname);
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exit(XFER_FAIL);
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}
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#if HAVE_FCHMOD
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if (fchmod(dbfd, 0644) == -1)
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#else
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if (chmod(tmpname, 0644) == -1)
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#endif
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{
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perror(tmpname);
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if (!quiet)
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syslog(LOG_ERR, "can't [f]chmod tmpfile (%s): %m\n",
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tmpname);
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exit(XFER_FAIL);
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}
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if ((dbfp = fdopen(dbfd, "r+")) == NULL) {
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perror(tmpname);
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if (!quiet)
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syslog(LOG_ERR, "can't fdopen tmpfile (%s)", tmpname);
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exit(XFER_FAIL);
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}
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#ifdef DEBUG
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if (debug) {
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/* ddtfile is now something like "/usr/tmp/xfer.ddt.XXXXXX" */
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if ((ddtd = mkstemp(ddtfile)) == -1) {
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perror(ddtfile);
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debug = 0;
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}
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#if HAVE_FCHMOD
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else if (fchmod(ddtd, 0644) == -1)
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#else
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else if (chmod(ddtfile, 0644) == -1)
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#endif
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{
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perror(ddtfile);
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debug = 0;
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} else if ((ddt = fdopen(ddtd, "w")) == NULL) {
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perror(ddtfile);
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debug = 0;
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} else {
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#ifdef HAVE_SETVBUF
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setvbuf(ddt, NULL, _IOLBF, BUFSIZ);
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#else
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setlinebuf(ddt);
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#endif
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}
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}
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#endif
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/*
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* Ignore many types of signals that named (assumed to be our parent)
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* considers important- if not, the user controlling named with
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* signals usually kills us.
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*/
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(void) signal(SIGHUP, SIG_IGN);
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#ifdef SIGSYS
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(void) signal(SIGSYS, SIG_IGN);
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#endif
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#ifdef DEBUG
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if (debug == 0)
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#endif
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{
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(void) signal(SIGINT, SIG_IGN);
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(void) signal(SIGQUIT, SIG_IGN);
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}
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(void) signal(SIGIOT, SIG_IGN);
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#if defined(SIGUSR1) && defined(SIGUSR2)
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(void) signal(SIGUSR1, SIG_IGN);
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(void) signal(SIGUSR2, SIG_IGN);
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#else /* SIGUSR1&&SIGUSR2 */
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(void) signal(SIGEMT, SIG_IGN);
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(void) signal(SIGFPE, SIG_IGN);
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#endif /* SIGUSR1&&SIGUSR2 */
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dprintf(1, (ddt, "domain `%s'; file `%s'; serial %lu; closed %d\n",
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domain, dbfile, (u_long)serial_no, closed));
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buildservicelist();
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buildprotolist();
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/* init zone data */
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zp = &zone;
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#ifdef STUBS
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if (stub_only)
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zp->z_type = Z_STUB;
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else
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#endif
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zp->z_type = Z_SECONDARY;
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#ifdef GEN_AXFR
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zp->z_class = class;
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#endif
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zp->z_origin = domain;
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zp->z_source = dbfile;
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zp->z_addrcnt = 0;
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dprintf(1, (ddt, "zone found (%d): \"%s\", source = %s\n",
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zp->z_type,
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(zp->z_origin[0] == '\0')
|
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? "."
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: zp->z_origin,
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zp->z_source));
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|
|
for (; optind != argc; optind++) {
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tm = argv[optind];
|
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if (!inet_aton(tm, &zp->z_addr[zp->z_addrcnt])) {
|
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hp = gethostbyname(tm);
|
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if (hp == NULL) {
|
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syslog(LOG_NOTICE,
|
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"uninterpretable server (%s) for %s\n",
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tm, zp->z_origin);
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continue;
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}
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bcopy(hp->h_addr,
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(char *)&zp->z_addr[zp->z_addrcnt],
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INADDRSZ);
|
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dprintf(1, (ddt, "Arg: \"%s\"\n", tm));
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}
|
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if (zp->z_addr[zp->z_addrcnt].s_addr == 0) {
|
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syslog(LOG_NOTICE,
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|
"SOA query to 0.0.0.0 (%s) for %s",
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tm, zp->z_origin);
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continue;
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}
|
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if (++zp->z_addrcnt >= NSMAX) {
|
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zp->z_addrcnt = NSMAX;
|
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dprintf(1, (ddt, "NSMAX reached\n"));
|
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break;
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}
|
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}
|
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dprintf(1, (ddt, "addrcnt = %d\n", zp->z_addrcnt));
|
|
|
|
res_init();
|
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_res.options &= ~(RES_DEFNAMES | RES_DNSRCH | RES_RECURSE);
|
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result = getzone(zp, serial_no, port);
|
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(void) my_fclose(dbfp);
|
|
switch (result) {
|
|
|
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case XFER_SUCCESS: /* ok exit */
|
|
if (rename(tmpname, dbfile) == -1) {
|
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perror("rename");
|
|
if (!quiet)
|
|
syslog(LOG_ERR, "rename %s to %s: %m",
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tmpname, dbfile);
|
|
exit(XFER_FAIL);
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}
|
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exit(XFER_SUCCESS);
|
|
|
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case XFER_UPTODATE: /* the zone was already uptodate */
|
|
(void) unlink(tmpname);
|
|
exit(XFER_UPTODATE);
|
|
|
|
default:
|
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result = XFER_FAIL;
|
|
/* fall through */
|
|
case XFER_TIMEOUT:
|
|
case XFER_FAIL:
|
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cleanup_for_exit();
|
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exit(result);
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}
|
|
/*NOTREACHED*/
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}
|
|
|
|
static char *UsageText[] = {
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"\t-z zone_to_transfer\n",
|
|
"\t-f db_file\n",
|
|
"\t-s serial_no\n",
|
|
"\t[-d debug_level]\n",
|
|
"\t[-l debug_log_file]\n",
|
|
"\t[-t trace_file]\n",
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|
"\t[-p port]\n",
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|
#ifdef STUBS
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"\t[-S]\n",
|
|
#endif
|
|
#ifdef GEN_AXFR
|
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"\t[-C class]\n",
|
|
#endif
|
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"\tservers...\n",
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NULL
|
|
};
|
|
|
|
static void
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usage(msg)
|
|
const char *msg;
|
|
{
|
|
char * const *line;
|
|
|
|
fprintf(stderr, "Usage error: %s\n", msg);
|
|
fprintf(stderr, "Usage: %s\n", ProgName);
|
|
for (line = UsageText; *line; line++)
|
|
fputs(*line, stderr);
|
|
exit(XFER_FAIL);
|
|
}
|
|
|
|
#define DEF_DNAME '\001' /* '\0' means the root domain */
|
|
/* XXX: The following variables should probably all be "static" */
|
|
u_int32_t minimum_ttl = 0;
|
|
int soa_cnt = 0;
|
|
#ifdef STUBS
|
|
int ns_cnt = 0;
|
|
#endif
|
|
int query_type = 0;
|
|
int prev_comment = 0; /* was previous record a comment? */
|
|
char zone_top[MAXDNAME]; /* the top of the zone */
|
|
char prev_origin[MAXDNAME]; /* from most recent $ORIGIN line */
|
|
char prev_dname[MAXDNAME] = { DEF_DNAME }; /* from previous record */
|
|
char prev_ns_dname[MAXDNAME] = { DEF_DNAME }; /* from most recent NS record */
|
|
|
|
static int
|
|
getzone(zp, serial_no, port)
|
|
struct zoneinfo *zp;
|
|
u_int32_t serial_no;
|
|
int port;
|
|
{
|
|
HEADER *hp;
|
|
u_int16_t len;
|
|
u_int32_t serial;
|
|
int s, n, l, error = 0;
|
|
u_int cnt;
|
|
u_char *cp, *nmp, *eom, *tmp ;
|
|
u_char *buf = NULL;
|
|
u_int bufsize;
|
|
char name[MAXDNAME], name2[MAXDNAME];
|
|
struct sockaddr_in sin;
|
|
#ifdef POSIX_SIGNALS
|
|
struct sigaction sv, osv;
|
|
#else
|
|
struct sigvec sv, osv;
|
|
#endif
|
|
int qdcount, ancount, aucount, class, type;
|
|
const char *badsoa_msg = "Nil";
|
|
|
|
#ifdef DEBUG
|
|
if (debug) {
|
|
(void)fprintf(ddt,"getzone() %s ", zp->z_origin);
|
|
switch (zp->z_type) {
|
|
case Z_STUB:
|
|
fprintf(ddt,"stub\n");
|
|
break;
|
|
case Z_SECONDARY:
|
|
fprintf(ddt,"secondary\n");
|
|
break;
|
|
default:
|
|
fprintf(ddt,"unknown type\n");
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef POSIX_SIGNALS
|
|
bzero((char *)&sv, sizeof sv);
|
|
sv.sa_handler = (SIG_FN (*)()) read_alarm;
|
|
/* SA_ONSTACK isn't recommended for strict POSIX code */
|
|
/* is it absolutely necessary? */
|
|
/* sv.sa_flags = SA_ONSTACK; */
|
|
sigfillset(&sv.sa_mask);
|
|
(void) sigaction(SIGALRM, &sv, &osv);
|
|
bzero((char *)&sv, sizeof sv);
|
|
sv.sa_handler = (SIG_FN (*)()) term_handler;
|
|
sigfillset(&sv.sa_mask);
|
|
(void) sigaction(SIGTERM, &sv, &osv);
|
|
#else
|
|
bzero((char *)&sv, sizeof sv);
|
|
sv.sv_handler = read_alarm;
|
|
sv.sv_mask = ~0;
|
|
(void) sigvec(SIGALRM, &sv, &osv);
|
|
bzero((char *)&sv, sizeof sv);
|
|
sv.sv_handler = term_handler;
|
|
sv.sv_mask = ~0;
|
|
(void) sigvec(SIGTERM, &sv, &osv);
|
|
#endif
|
|
|
|
strcpy(zone_top, zp->z_origin);
|
|
if ((l = strlen(zone_top)) != 0 && zone_top[l - 1] == '.')
|
|
zone_top[l - 1] = '\0';
|
|
strcpy(prev_origin, zone_top);
|
|
|
|
for (cnt = 0; cnt < zp->z_addrcnt; cnt++) {
|
|
#ifdef GEN_AXFR
|
|
curclass = zp->z_class;
|
|
#else
|
|
curclass = C_IN;
|
|
#endif
|
|
error = 0;
|
|
if (buf == NULL) {
|
|
if ((buf = (u_char *)malloc(2 * PACKETSZ)) == NULL) {
|
|
syslog(LOG_INFO, "malloc(%u) failed",
|
|
2 * PACKETSZ);
|
|
error++;
|
|
break;
|
|
}
|
|
bufsize = 2 * PACKETSZ;
|
|
}
|
|
bzero((char *)&sin, sizeof(sin));
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_port = (u_int16_t)port;
|
|
sin.sin_addr = zp->z_addr[cnt];
|
|
if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
|
|
syslog(LOG_INFO, "socket: %m");
|
|
error++;
|
|
break;
|
|
}
|
|
dprintf(2, (ddt, "connecting to server #%d [%s].%d\n",
|
|
cnt+1, inet_ntoa(sin.sin_addr),
|
|
ntohs(sin.sin_port)));
|
|
if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
|
|
if (!quiet)
|
|
syslog(LOG_INFO,
|
|
"connect(%s) for zone %s failed: %m",
|
|
inet_ntoa(sin.sin_addr), zp->z_origin);
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
#ifndef GEN_AXFR
|
|
tryagain:
|
|
#endif
|
|
n = res_mkquery(QUERY, zp->z_origin, curclass,
|
|
T_SOA, NULL, 0, NULL, buf, bufsize);
|
|
if (n < 0) {
|
|
if (!quiet)
|
|
syslog(LOG_INFO,
|
|
"zone %s: res_mkquery T_SOA failed",
|
|
zp->z_origin);
|
|
(void) my_close(s);
|
|
#ifdef POSIX_SIGNALS
|
|
(void) sigaction(SIGALRM, &osv, (struct sigaction *)0);
|
|
#else
|
|
(void) sigvec(SIGALRM, &osv, (struct sigvec *)0);
|
|
#endif
|
|
return (XFER_FAIL);
|
|
}
|
|
/*
|
|
* Send length & message for SOA query
|
|
*/
|
|
if (writemsg(s, buf, n) < 0) {
|
|
syslog(LOG_INFO, "writemsg: %m");
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
/*
|
|
* Get out your butterfly net and catch the SOA
|
|
*/
|
|
if (netread(s, (char *)buf, INT16SZ, XFER_TIMER) < 0) {
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
if ((len = _getshort(buf)) == 0) {
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
if (len > bufsize) {
|
|
if ((buf = (u_char *)realloc(buf, len)) == NULL) {
|
|
syslog(LOG_INFO,
|
|
"malloc(%u) failed for SOA from server [%s], zone %s\n",
|
|
len,
|
|
inet_ntoa(sin.sin_addr),
|
|
zp->z_origin);
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
bufsize = len;
|
|
}
|
|
if (netread(s, (char *)buf, len, XFER_TIMER) < 0) {
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
#ifdef DEBUG
|
|
if (debug >= 3) {
|
|
(void)fprintf(ddt,"len = %d\n", len);
|
|
fp_nquery(buf, len, ddt);
|
|
}
|
|
#endif
|
|
hp = (HEADER *) buf;
|
|
qdcount = ntohs(hp->qdcount);
|
|
ancount = ntohs(hp->ancount);
|
|
aucount = ntohs(hp->nscount);
|
|
|
|
/*
|
|
* close socket if any of these apply:
|
|
* 1) rcode != NOERROR
|
|
* 2) not an authority response
|
|
* 3) not an answer to our question
|
|
* 4) both the number of answers and authority count < 1)
|
|
*/
|
|
if (hp->rcode != NOERROR || !hp->aa || qdcount != 1 ||
|
|
(ancount < 1 && aucount < 1)) {
|
|
#ifndef GEN_AXFR
|
|
if (curclass == C_IN) {
|
|
dprintf(1, (ddt, "SOA failed, trying C_HS\n"));
|
|
curclass = C_HS;
|
|
goto tryagain;
|
|
}
|
|
#endif
|
|
#ifndef ultrix
|
|
syslog(LOG_NOTICE,
|
|
"[%s] %s for %s, SOA query got rcode %d, aa %d, ancount %d, aucount %d",
|
|
inet_ntoa(sin.sin_addr),
|
|
(hp->aa
|
|
? (qdcount==1 ?"no SOA found" :"bad response")
|
|
: "not authoritative"),
|
|
zp->z_origin[0] != '\0' ? zp->z_origin : ".",
|
|
hp->rcode, hp->aa, ancount, aucount);
|
|
#endif
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
zp_start = *zp;
|
|
if ((int)len < HFIXEDSZ + QFIXEDSZ) {
|
|
badsoa_msg = "too short";
|
|
badsoa:
|
|
syslog(LOG_INFO,
|
|
"malformed SOA from [%s], zone %s: %s",
|
|
inet_ntoa(sin.sin_addr), zp->z_origin,
|
|
badsoa_msg);
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
/*
|
|
* Step through response.
|
|
*/
|
|
tmp = buf + HFIXEDSZ;
|
|
eom = buf + len;
|
|
/* Query Section. */
|
|
n = dn_expand(buf, eom, tmp, name2, sizeof name2);
|
|
if (n < 0) {
|
|
badsoa_msg = "qname error";
|
|
goto badsoa;
|
|
}
|
|
tmp += n;
|
|
GETSHORT(type, tmp);
|
|
GETSHORT(class, tmp);
|
|
if (class != curclass || type != T_SOA ||
|
|
strcasecmp(zp->z_origin, name2) != 0) {
|
|
syslog(LOG_INFO,
|
|
"wrong query in resp from [%s], zone %s: [%s %s %s]\n",
|
|
inet_ntoa(sin.sin_addr), zp->z_origin,
|
|
name2, p_class(class), p_type(type));
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
/* ... Answer Section.
|
|
* We may have to loop a little, to bypass SIG SOA's in
|
|
* the response.
|
|
*/
|
|
do {
|
|
u_char *cp4;
|
|
u_short type, class, dlen;
|
|
u_long ttl;
|
|
|
|
n = dn_expand(buf, eom, tmp, name2, sizeof name2);
|
|
if (n < 0) {
|
|
badsoa_msg = "aname error";
|
|
goto badsoa;
|
|
}
|
|
tmp += n;
|
|
|
|
/* Are type, class, and ttl OK? */
|
|
cp4 = tmp; /* Leave tmp pointing to type field */
|
|
if (eom - cp4 < 3 * INT16SZ + INT32SZ) {
|
|
badsoa_msg = "zinfo too short";
|
|
goto badsoa;
|
|
}
|
|
GETSHORT(type, cp4);
|
|
GETSHORT(class, cp4);
|
|
GETLONG(ttl, cp4);
|
|
GETSHORT(dlen, cp4);
|
|
if (type == T_SOA)
|
|
break;
|
|
/* Skip to next record, if any. */
|
|
dprintf (1, (ddt, "skipping %s %s RR in response\n",
|
|
name2, p_type (type)));
|
|
tmp = cp4 + dlen;
|
|
} while (1);
|
|
|
|
if (strcasecmp(zp->z_origin, name2) != 0) {
|
|
syslog(LOG_INFO,
|
|
"wrong answer in resp from [%s], zone %s: [%s %s %s]\n",
|
|
inet_ntoa(sin.sin_addr), zp->z_origin,
|
|
name2, p_class(class), p_type(type));
|
|
error++;
|
|
(void) my_close(s);
|
|
continue;
|
|
}
|
|
badsoa_msg = soa_zinfo(&zp_start, tmp, eom);
|
|
if (badsoa_msg)
|
|
goto badsoa;
|
|
if (SEQ_GT(zp_start.z_serial, serial_no) || !serial_no) {
|
|
const char *l, *nl;
|
|
dprintf(1, (ddt, "need update, serial %lu\n",
|
|
(u_long)zp_start.z_serial));
|
|
hp = (HEADER *) buf;
|
|
soa_cnt = 0;
|
|
#ifdef STUBS
|
|
ns_cnt = 0;
|
|
#endif
|
|
gettime(&tt);
|
|
for (l = Version; l; l = nl) {
|
|
size_t len;
|
|
if ((nl = strchr(l, '\n')) != NULL) {
|
|
len = nl - l;
|
|
nl = nl + 1;
|
|
} else {
|
|
len = strlen(l);
|
|
nl = NULL;
|
|
}
|
|
while (isspace((unsigned char) *l))
|
|
l++;
|
|
if (*l)
|
|
fprintf(dbfp, "; BIND version %.*s\n",
|
|
(int)len, l);
|
|
}
|
|
fprintf(dbfp, "; zone '%s' last serial %lu\n",
|
|
domain, (u_long)serial_no);
|
|
fprintf(dbfp, "; from %s at %s",
|
|
inet_ntoa(sin.sin_addr),
|
|
ctimel(tt.tv_sec));
|
|
for (;;) {
|
|
if ((soa_cnt == 0) || (zp->z_type == Z_STUB)) {
|
|
#ifdef STUBS
|
|
if (zp->z_type == Z_STUB) {
|
|
if (soa_cnt == 1 &&
|
|
ns_cnt == 0)
|
|
query_type = T_NS;
|
|
else
|
|
query_type = T_SOA;
|
|
} else
|
|
#endif
|
|
query_type = T_AXFR;
|
|
n = res_mkquery(QUERY, zp->z_origin,
|
|
curclass, query_type,
|
|
NULL, 0,
|
|
NULL, buf, bufsize);
|
|
if (n < 0) {
|
|
if (!quiet) {
|
|
#ifdef STUBS
|
|
if (zp->z_type == Z_STUB)
|
|
syslog(LOG_INFO,
|
|
(query_type == T_SOA)
|
|
? "zone %s: res_mkquery T_SOA failed"
|
|
: "zone %s: res_mkquery T_NS failed",
|
|
zp->z_origin);
|
|
else
|
|
#endif
|
|
syslog(LOG_INFO,
|
|
"zone %s: res_mkquery T_AXFR failed",
|
|
zp->z_origin);
|
|
}
|
|
(void) my_close(s);
|
|
#ifdef POSIX_SIGNALS
|
|
sigaction(SIGALRM, &osv,
|
|
(struct sigaction *)0);
|
|
#else
|
|
sigvec(SIGALRM, &osv,
|
|
(struct sigvec *)0);
|
|
#endif
|
|
return (XFER_FAIL);
|
|
}
|
|
/*
|
|
* Send length & msg for zone transfer
|
|
*/
|
|
if (writemsg(s, buf, n) < 0) {
|
|
syslog(LOG_INFO,
|
|
"writemsg: %m");
|
|
error++;
|
|
(void) my_close(s);
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* Receive length & response
|
|
*/
|
|
if (netread(s, (char *)buf, INT16SZ,
|
|
(soa_cnt == 0) ?300 :XFER_TIMER)
|
|
< 0) {
|
|
error++;
|
|
break;
|
|
}
|
|
if ((len = _getshort(buf)) == 0)
|
|
break;
|
|
if (len > bufsize) {
|
|
buf = (u_char *)realloc(buf, len);
|
|
if (buf == NULL) {
|
|
syslog(LOG_INFO,
|
|
"malloc(%u) failed for packet from server [%s], zone %s\n",
|
|
len,
|
|
inet_ntoa(sin.sin_addr),
|
|
zp->z_origin);
|
|
error++;
|
|
break;
|
|
}
|
|
bufsize = len;
|
|
}
|
|
hp = (HEADER *)buf;
|
|
eom = buf + len;
|
|
if (netread(s, (char *)buf, len, XFER_TIMER)
|
|
< 0) {
|
|
error++;
|
|
break;
|
|
}
|
|
#ifdef DEBUG
|
|
if (debug >= 3) {
|
|
(void)fprintf(ddt,"len = %d\n", len);
|
|
fp_nquery(buf, len, ddt);
|
|
}
|
|
if (fp)
|
|
fp_nquery(buf, len, fp);
|
|
#endif
|
|
if (len < HFIXEDSZ) {
|
|
badrec:
|
|
error++;
|
|
syslog(LOG_INFO,
|
|
"record too short from [%s], zone %s\n",
|
|
inet_ntoa(sin.sin_addr),
|
|
zp->z_origin);
|
|
break;
|
|
}
|
|
cp = buf + HFIXEDSZ;
|
|
if (hp->qdcount) {
|
|
if ((n = dn_skipname(cp, eom)) == -1
|
|
|| n + QFIXEDSZ >= eom - cp)
|
|
goto badrec;
|
|
cp += n + QFIXEDSZ;
|
|
}
|
|
nmp = cp;
|
|
if ((n = dn_skipname(cp, eom)) == -1)
|
|
goto badrec;
|
|
tmp = cp + n;
|
|
#ifdef STUBS
|
|
if (zp->z_type == Z_STUB) {
|
|
ancount = ntohs(hp->ancount);
|
|
for (n = cnt = 0 ; cnt < ancount ; cnt++) {
|
|
n = print_output(zp, serial_no, buf,
|
|
len, cp);
|
|
if (n < 0)
|
|
break;
|
|
cp += n;
|
|
}
|
|
/*
|
|
* If we've processed the answer section and
|
|
* didn't get any useful answers, bail out.
|
|
*/
|
|
if (query_type == T_SOA && soa_cnt == 0) {
|
|
syslog(LOG_ERR,
|
|
"stubs: no SOA in answer");
|
|
error++;
|
|
break;
|
|
}
|
|
if (query_type == T_NS && ns_cnt == 0) {
|
|
syslog(LOG_ERR,
|
|
"stubs: no NS in answer");
|
|
error++;
|
|
break;
|
|
}
|
|
if (n >= 0 && hp->nscount) {
|
|
ancount = ntohs(hp->nscount);
|
|
for (cnt = 0; cnt < ancount; cnt++) {
|
|
n = print_output(zp,
|
|
serial_no,
|
|
buf, len, cp);
|
|
if (n < 0)
|
|
break;
|
|
cp += n;
|
|
}
|
|
}
|
|
ancount = ntohs(hp->arcount);
|
|
for (cnt = 0; n >= 0 && cnt < ancount; cnt++) {
|
|
n = print_output(zp, serial_no, buf,
|
|
len, cp);
|
|
cp += n;
|
|
}
|
|
if (n < 0) {
|
|
syslog(LOG_INFO,
|
|
"print_output: unparseable answer (%d), zone %s",
|
|
hp->rcode, zp->z_origin);
|
|
error++;
|
|
break;
|
|
}
|
|
if (cp != eom) {
|
|
syslog(LOG_INFO,
|
|
"print_output: short answer (%d, %d), zone %s",
|
|
cp - buf, n, zp->z_origin);
|
|
error++;
|
|
break;
|
|
}
|
|
} else {
|
|
#endif /*STUBS*/
|
|
ancount = ntohs(hp->ancount);
|
|
for (n = cnt = 0; cnt < ancount; cnt++) {
|
|
n = print_output(zp, serial_no, buf,
|
|
len, cp);
|
|
if (n < 0)
|
|
break;
|
|
cp += n;
|
|
}
|
|
if (n < 0) {
|
|
syslog(LOG_INFO,
|
|
"print_output: unparseable answer (%d), zone %s",
|
|
hp->rcode, zp->z_origin);
|
|
error++;
|
|
break;
|
|
}
|
|
if (cp != eom) {
|
|
syslog(LOG_INFO,
|
|
"print_output: short answer (%d, %d), zone %s",
|
|
cp - buf, eom - buf,
|
|
zp->z_origin);
|
|
error++;
|
|
break;
|
|
}
|
|
#ifdef STUBS
|
|
}
|
|
#endif
|
|
|
|
if (soa_cnt >= 2)
|
|
break;
|
|
|
|
}
|
|
(void) my_close(s);
|
|
if (error == 0) {
|
|
#ifdef POSIX_SIGNALS
|
|
(void) sigaction(SIGALRM, &osv,
|
|
(struct sigaction *)0);
|
|
#else
|
|
(void) sigvec(SIGALRM, &osv, (struct sigvec *)0);
|
|
#endif
|
|
return (XFER_SUCCESS);
|
|
}
|
|
dprintf(2, (ddt, "error receiving zone transfer\n"));
|
|
} else if (zp_start.z_serial == serial_no) {
|
|
(void) my_close(s);
|
|
dprintf(1, (ddt,
|
|
"zone up-to-date, serial %u\n",
|
|
zp_start.z_serial));
|
|
return (XFER_UPTODATE);
|
|
} else {
|
|
(void) my_close(s);
|
|
if (!quiet)
|
|
syslog(LOG_NOTICE,
|
|
"serial from [%s], zone %s: %u lower than current: %u\n",
|
|
inet_ntoa(sin.sin_addr), zp->z_origin,
|
|
zp_start.z_serial, serial_no);
|
|
return (XFER_FAIL);
|
|
}
|
|
}
|
|
#ifdef POSIX_SIGNALS
|
|
(void) sigaction(SIGALRM, &osv, (struct sigaction *)0);
|
|
#else
|
|
(void) sigvec(SIGALRM, &osv, (struct sigvec *)0);
|
|
#endif
|
|
if (!error)
|
|
return (XFER_TIMEOUT);
|
|
return (XFER_FAIL);
|
|
}
|
|
|
|
static SIG_FN
|
|
term_handler() {
|
|
cleanup_for_exit();
|
|
_exit(XFER_FAIL); /* not safe to call exit() from a signal handler */
|
|
}
|
|
|
|
/*
|
|
* Set flag saying to read was interrupted
|
|
* used for a read timer
|
|
*/
|
|
static SIG_FN
|
|
read_alarm()
|
|
{
|
|
read_interrupted = 1;
|
|
}
|
|
|
|
static int
|
|
netread(fd, buf, len, timeout)
|
|
int fd;
|
|
register char *buf;
|
|
register int len;
|
|
int timeout;
|
|
{
|
|
static const char setitimerStr[] = "setitimer: %m";
|
|
struct itimerval ival, zeroival;
|
|
register int n;
|
|
#if defined(NETREAD_BROKEN)
|
|
int retries = 0;
|
|
#endif
|
|
|
|
memset(&zeroival, 0, sizeof zeroival);
|
|
ival = zeroival;
|
|
ival.it_value.tv_sec = timeout;
|
|
while (len > 0) {
|
|
if (setitimer(ITIMER_REAL, &ival, NULL) < 0) {
|
|
syslog(LOG_INFO, setitimerStr);
|
|
return (-1);
|
|
}
|
|
errno = 0;
|
|
n = recv(fd, buf, len, 0);
|
|
if (n == 0 && errno == 0) {
|
|
#if defined(NETREAD_BROKEN)
|
|
if (++retries < 42) /* doug adams */
|
|
continue;
|
|
#endif
|
|
syslog(LOG_INFO, "premature EOF, fetching \"%s\"",
|
|
domain);
|
|
return (-1);
|
|
}
|
|
if (n < 0) {
|
|
if (errno == 0) {
|
|
#if defined(NETREAD_BROKEN)
|
|
if (++retries < 42) /* doug adams */
|
|
continue;
|
|
#endif
|
|
syslog(LOG_INFO,
|
|
"recv(len=%d): n=%d && !errno",
|
|
len, n);
|
|
return (-1);
|
|
}
|
|
if (errno == EINTR) {
|
|
if (!read_interrupted) {
|
|
/* It wasn't a timeout; ignore it. */
|
|
continue;
|
|
}
|
|
errno = ETIMEDOUT;
|
|
}
|
|
syslog(LOG_INFO, "recv(len=%d): %m", len);
|
|
return (-1);
|
|
}
|
|
buf += n;
|
|
len -= n;
|
|
}
|
|
if (setitimer(ITIMER_REAL, &zeroival, NULL) < 0) {
|
|
syslog(LOG_INFO, setitimerStr);
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static const char *
|
|
soa_zinfo(zp, cp, eom)
|
|
register struct zoneinfo *zp;
|
|
register u_char *cp;
|
|
u_char *eom;
|
|
{
|
|
register int n;
|
|
int type, class;
|
|
u_long ttl;
|
|
|
|
/* Are type, class, and ttl OK? */
|
|
if (eom - cp < 3 * INT16SZ + INT32SZ)
|
|
return ("zinfo too short");
|
|
GETSHORT(type, cp);
|
|
GETSHORT(class, cp);
|
|
GETLONG(ttl, cp);
|
|
cp += INT16SZ; /* dlen */
|
|
if (type != T_SOA || class != curclass)
|
|
return ("zinfo wrong typ/cla/ttl");
|
|
/* Skip master name and contact name, we can't validate them. */
|
|
if ((n = dn_skipname(cp, eom)) == -1)
|
|
return ("zinfo mname");
|
|
cp += n;
|
|
if ((n = dn_skipname(cp, eom)) == -1)
|
|
return ("zinfo hname");
|
|
cp += n;
|
|
/* Grab the data fields. */
|
|
if (eom - cp < 5 * INT32SZ)
|
|
return ("zinfo dlen");
|
|
GETLONG(zp->z_serial, cp);
|
|
GETLONG(zp->z_refresh, cp);
|
|
GETLONG(zp->z_retry, cp);
|
|
GETLONG(zp->z_expire, cp);
|
|
GETLONG(zp->z_minimum, cp);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Parse the message, determine if it should be printed, and if so, print it
|
|
* in .db file form.
|
|
* Does minimal error checking on the message content.
|
|
*/
|
|
static int
|
|
print_output(zp, serial_no, msg, msglen, rrp)
|
|
struct zoneinfo *zp;
|
|
u_int32_t serial_no;
|
|
u_char *msg;
|
|
int msglen;
|
|
u_char *rrp;
|
|
{
|
|
register u_char *cp;
|
|
register HEADER *hp = (HEADER *) msg;
|
|
u_int32_t addr, ttl;
|
|
int i, j, tab, result, class, type, dlen, n1, n;
|
|
char data[BUFSIZ];
|
|
u_char *cp1, *cp2, *temp_ptr, *eom, *rr_type_ptr;
|
|
u_char *cdata;
|
|
char *origin, *proto, dname[MAXDNAME];
|
|
char *ignore = "";
|
|
const char *badsoa_msg;
|
|
|
|
eom = msg + msglen;
|
|
cp = rrp;
|
|
n = dn_expand(msg, msg + msglen, cp, dname, sizeof dname);
|
|
if (n < 0) {
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
cp += n;
|
|
rr_type_ptr = cp;
|
|
GETSHORT(type, cp);
|
|
GETSHORT(class, cp);
|
|
GETLONG(ttl, cp);
|
|
GETSHORT(dlen, cp);
|
|
|
|
origin = strchr(dname, '.');
|
|
if (origin == NULL)
|
|
origin = "";
|
|
else
|
|
origin++; /* move past the '.' */
|
|
dprintf(3, (ddt,
|
|
"print_output: dname %s type %d class %d ttl %lu\n",
|
|
dname, type, class, (u_long)ttl));
|
|
/*
|
|
* Convert the resource record data into the internal database format.
|
|
* CP points to the raw resource record.
|
|
* After this switch:
|
|
* CP has been updated to point past the RR.
|
|
* CP1 points to the internal database version.
|
|
* N is the length of the internal database version.
|
|
*/
|
|
switch (type) {
|
|
case T_A:
|
|
case T_WKS:
|
|
case T_HINFO:
|
|
case T_UINFO:
|
|
case T_TXT:
|
|
case T_X25:
|
|
case T_ISDN:
|
|
case T_LOC:
|
|
case T_NSAP:
|
|
case T_AAAA:
|
|
case T_UID:
|
|
case T_GID:
|
|
case T_KEY:
|
|
cp1 = cp;
|
|
n = dlen;
|
|
cp += n;
|
|
break;
|
|
|
|
case T_CNAME:
|
|
case T_MB:
|
|
case T_MG:
|
|
case T_MR:
|
|
case T_NS:
|
|
case T_PTR:
|
|
n = dn_expand(msg, msg + msglen, cp, data, sizeof data);
|
|
if (n < 0) {
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
cp += n;
|
|
cp1 = (u_char *)data;
|
|
n = strlen(data) + 1;
|
|
break;
|
|
|
|
case T_MINFO:
|
|
case T_SOA:
|
|
case T_RP:
|
|
n = dn_expand(msg, msg + msglen, cp, data, sizeof data);
|
|
if (n < 0) {
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
cp += n;
|
|
n = strlen(data) + 1;
|
|
cp1 = (u_char *)data + n;
|
|
n1 = sizeof data - n;
|
|
if (type == T_SOA)
|
|
n1 -= 5 * INT32SZ;
|
|
n = dn_expand(msg, msg + msglen, cp, (char *)cp1, n1);
|
|
if (n < 0) {
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
cp += n;
|
|
cp1 += strlen((char *) cp1) + 1;
|
|
if (type == T_SOA) {
|
|
if ((eom - cp) < (5 * INT32SZ)) {
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
temp_ptr = cp + 4 * INT32SZ;
|
|
GETLONG(minimum_ttl, temp_ptr);
|
|
n = 5 * INT32SZ;
|
|
bcopy((char *) cp, (char *) cp1, n);
|
|
cp += n;
|
|
cp1 += n;
|
|
}
|
|
n = cp1 - (u_char *)data;
|
|
cp1 = (u_char *)data;
|
|
break;
|
|
|
|
case T_NAPTR:
|
|
/* Grab weight and port. */
|
|
bcopy(cp, data, INT16SZ*2);
|
|
cp1 = (u_char *) (data + INT16SZ*2);
|
|
cp += INT16SZ*2;
|
|
|
|
/* Flags */
|
|
n = *cp++;
|
|
*cp1++ = n;
|
|
bcopy(cp, cp1, n);
|
|
cp += n; cp1 += n;
|
|
|
|
/* Service */
|
|
n = *cp++;
|
|
*cp1++ = n;
|
|
bcopy(cp, cp1, n);
|
|
cp += n; cp1 += n;
|
|
|
|
/* Regexp */
|
|
n = *cp++;
|
|
*cp1++ = n;
|
|
bcopy(cp, cp1, n);
|
|
cp += n; cp1 += n;
|
|
|
|
/* Replacement */
|
|
n = dn_expand(msg, msg + msglen, cp, (char *)cp1,
|
|
sizeof data - ((char *)cp1 - data));
|
|
if (n < 0)
|
|
return (-1);
|
|
cp += n;
|
|
|
|
/* compute end of data */
|
|
cp1 += strlen((char *)cp1) + 1;
|
|
/* compute size of data */
|
|
n = cp1 - (u_char *)data;
|
|
cp1 = (u_char *)data;
|
|
break;
|
|
|
|
case T_MX:
|
|
case T_AFSDB:
|
|
case T_RT:
|
|
case T_SRV:
|
|
/* grab preference */
|
|
bcopy((char *)cp, data, INT16SZ);
|
|
cp1 = (u_char *)data + INT16SZ;
|
|
cp += INT16SZ;
|
|
|
|
if (type == T_SRV) {
|
|
bcopy((char *)cp, cp1, INT16SZ*2);
|
|
cp1 += INT16SZ*2;
|
|
cp += INT16SZ*2;
|
|
}
|
|
|
|
/* get name */
|
|
n = dn_expand(msg, msg + msglen, cp,
|
|
(char *)cp1, sizeof data - (cp1-(u_char *)data));
|
|
if (n < 0)
|
|
return (-1);
|
|
cp += n;
|
|
|
|
/* compute end of data */
|
|
cp1 += strlen((char *) cp1) + 1;
|
|
/* compute size of data */
|
|
n = cp1 - (u_char *)data;
|
|
cp1 = (u_char *)data;
|
|
break;
|
|
|
|
case T_PX:
|
|
/* grab preference */
|
|
bcopy((char *)cp, data, INT16SZ);
|
|
cp1 = (u_char *)data + INT16SZ;
|
|
cp += INT16SZ;
|
|
|
|
/* get MAP822 name */
|
|
n = dn_expand(msg, msg + msglen, cp,
|
|
(char *)cp1, sizeof data - INT16SZ);
|
|
if (n < 0)
|
|
return (-1);
|
|
cp += n;
|
|
cp1 += (n = (strlen((char *) cp1) + 1));
|
|
n1 = sizeof data - n;
|
|
|
|
/* get MAPX400 name */
|
|
n = dn_expand(msg, msg + msglen, cp, (char *)cp1, n1);
|
|
if (n < 0)
|
|
return (-1);
|
|
cp += n;
|
|
cp1 += strlen((char *) cp1) + 1;
|
|
n = cp1 - (u_char *)data;
|
|
cp1 = (u_char *)data;
|
|
break;
|
|
|
|
case T_SIG:
|
|
/* CP is the raw resource record as it arrived.
|
|
* CP1, after this switch, points to the internal database version. */
|
|
cp1 = (u_char *)data;
|
|
|
|
/* first just copy over the type_covered, algorithm, */
|
|
/* labels, orig ttl, two timestamps, and the footprint */
|
|
bcopy( cp, cp1, 18 );
|
|
cp += 18;
|
|
cp1 += 18;
|
|
|
|
/* then the signer's name */
|
|
n = dn_expand(msg, msg + msglen, cp,
|
|
(char *)cp1, (sizeof data) - 18);
|
|
if (n < 0)
|
|
return (-1);
|
|
cp += n;
|
|
cp1 += strlen((char*)cp1)+1;
|
|
|
|
/* finally, we copy over the variable-length signature.
|
|
Its size is the total data length, minus what we copied. */
|
|
n = dlen - (18 + n);
|
|
if (n > (sizeof data) - (cp1 - (u_char *)data))
|
|
return (-1); /* out of room! */
|
|
bcopy(cp, cp1, n);
|
|
cp += n;
|
|
cp1 += n;
|
|
|
|
/* compute size of data */
|
|
n = cp1 - (u_char *)data;
|
|
cp1 = (u_char *)data;
|
|
break;
|
|
|
|
default:
|
|
syslog(LOG_INFO, "\"%s %s %s\" - unknown type (%d)",
|
|
dname, p_class(class), p_type(type), type);
|
|
hp->rcode = NOTIMP;
|
|
return (-1);
|
|
}
|
|
|
|
if (n > MAXDATA) {
|
|
dprintf(1, (ddt,
|
|
"update type %d: %d bytes is too much data\n",
|
|
type, n));
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
cdata = cp1;
|
|
result = cp - rrp;
|
|
|
|
/*
|
|
* Special handling for SOA records.
|
|
*/
|
|
|
|
if (type == T_SOA) {
|
|
if (strcasecmp(dname, zp->z_origin) != 0) {
|
|
syslog(LOG_INFO,
|
|
"wrong zone name in AXFR (wanted \"%s\", got \"%s\")",
|
|
zp->z_origin, dname);
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
if (!soa_cnt) {
|
|
badsoa_msg = soa_zinfo(&zp_start, rr_type_ptr, eom);
|
|
if (badsoa_msg) {
|
|
syslog(LOG_INFO,
|
|
"malformed SOA for zone %s: %s",
|
|
zp->z_origin, badsoa_msg);
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
if (SEQ_GT(zp_start.z_serial, serial_no) ||
|
|
!serial_no)
|
|
soa_cnt++;
|
|
else {
|
|
syslog(LOG_INFO,
|
|
"serial went backwards after transfer started");
|
|
return (-1);
|
|
}
|
|
} else {
|
|
badsoa_msg = soa_zinfo(&zp_finish, rr_type_ptr, eom);
|
|
if (badsoa_msg) {
|
|
syslog(LOG_INFO,
|
|
"malformed SOA for zone %s: %s",
|
|
zp->z_origin, badsoa_msg);
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
dprintf(2, (ddt, "SOA, serial %lu\n",
|
|
(u_long)zp_finish.z_serial));
|
|
if (zp_start.z_serial != zp_finish.z_serial) {
|
|
dprintf(1, (ddt, "serial changed, restart\n"));
|
|
soa_cnt = 0;
|
|
#ifdef STUBS
|
|
ns_cnt = 0;
|
|
#endif
|
|
minimum_ttl = 0;
|
|
strcpy(prev_origin, zp->z_origin);
|
|
prev_dname[0] = DEF_DNAME;
|
|
/*
|
|
* Flush buffer, truncate file
|
|
* and seek to beginning to restart.
|
|
*/
|
|
fflush(dbfp);
|
|
if (ftruncate(fileno(dbfp), 0) != 0) {
|
|
if (!quiet)
|
|
syslog(LOG_INFO,
|
|
"ftruncate %s: %m\n",
|
|
tmpname);
|
|
return (-1);
|
|
}
|
|
fseek(dbfp, 0L, 0);
|
|
return (result);
|
|
}
|
|
soa_cnt++;
|
|
return (result);
|
|
}
|
|
}
|
|
|
|
#ifdef STUBS
|
|
if (zp->z_type == Z_STUB) {
|
|
if (query_type == T_NS && type == T_NS)
|
|
ns_cnt++;
|
|
/*
|
|
* If we're processing a response to an SOA query, we don't
|
|
* want to print anything from the response except for the SOA.
|
|
* We do want to check everything in the packet, which is
|
|
* why we do this check now instead of earlier.
|
|
*/
|
|
if (query_type == T_SOA && type != T_SOA)
|
|
return (result);
|
|
}
|
|
#endif
|
|
|
|
if (!soa_cnt || soa_cnt >= 2) {
|
|
char *gripe;
|
|
|
|
if (!soa_cnt)
|
|
gripe = "got RR before first SOA";
|
|
else
|
|
gripe = "got RR after second SOA";
|
|
syslog(LOG_INFO, "%s in zone %s", gripe, zp->z_origin);
|
|
hp->rcode = FORMERR;
|
|
return (-1);
|
|
}
|
|
|
|
#ifdef NO_GLUE
|
|
/*
|
|
* If they are trying to tell us info about something that is
|
|
* not in the zone that we are transfering, then ignore it!
|
|
* They don't have the authority to tell us this info.
|
|
*
|
|
* We have to do a bit of checking here - the name that we are
|
|
* checking vs is fully qualified & may be in a subdomain of the
|
|
* zone in question. We also need to ignore any final dots.
|
|
*
|
|
* If a domain has both NS records and non-NS records, (for
|
|
* example, NS and MX records), then we should ignore the non-NS
|
|
* records (except that we should not ignore glue A records).
|
|
* XXX: It is difficult to do this properly, so we just compare
|
|
* the current dname with that in the most recent NS record.
|
|
* This defends against the most common error case,
|
|
* where the remote server sends MX records soon after the
|
|
* NS records for a particular domain. If sent earlier, we lose. XXX
|
|
*/
|
|
if (!samedomain(dname, domain)) {
|
|
(void) fprintf(dbfp, "; Ignoring info about %s, not in zone %s.\n",
|
|
dname, domain);
|
|
ignore = "; ";
|
|
} else if (type != T_NS && type != T_A &&
|
|
strcasecmp(zone_top, dname) != 0 &&
|
|
strcasecmp(prev_ns_dname, dname) == 0)
|
|
{
|
|
(void) fprintf(dbfp, "; Ignoring extra info about %s, invalid after NS delegation.\n",
|
|
dname);
|
|
ignore = "; ";
|
|
}
|
|
#endif /*NO_GLUE*/
|
|
|
|
/*
|
|
* If the current record is not being ignored, but the
|
|
* previous record was ignored, then we invalidate information
|
|
* that might have been altered by ignored records.
|
|
* (This means that we sometimes output unnecessary $ORIGIN
|
|
* lines, but that is harmless.)
|
|
*
|
|
* Also update prev_comment now.
|
|
*/
|
|
if (prev_comment && ignore[0] == '\0') {
|
|
prev_dname[0] = DEF_DNAME;
|
|
prev_origin[0] = DEF_DNAME;
|
|
}
|
|
prev_comment = (ignore[0] != '\0');
|
|
|
|
/*
|
|
* set prev_ns_dname if necessary
|
|
*/
|
|
if (type == T_NS) {
|
|
(void) strcpy(prev_ns_dname, dname);
|
|
}
|
|
|
|
/*
|
|
* If the origin has changed, print the new origin
|
|
*/
|
|
if (strcasecmp(prev_origin, origin)) {
|
|
(void) strcpy(prev_origin, origin);
|
|
(void) fprintf(dbfp, "%s$ORIGIN %s.\n", ignore, origin);
|
|
}
|
|
tab = 0;
|
|
|
|
if (strcasecmp(prev_dname, dname)) {
|
|
/*
|
|
* set the prev_dname to be the current dname, then cut off all
|
|
* characters of dname after (and including) the first '.'
|
|
*/
|
|
char *cutp = strchr(dname, '.');
|
|
|
|
(void) strcpy(prev_dname, dname);
|
|
if (cutp)
|
|
*cutp = '\0';
|
|
|
|
if (dname[0] == 0) {
|
|
if (origin[0] == 0)
|
|
(void) fprintf(dbfp, "%s.\t", ignore);
|
|
else
|
|
(void) fprintf(dbfp, "%s.%s.\t",
|
|
ignore, origin); /* ??? */
|
|
} else
|
|
(void) fprintf(dbfp, "%s%s\t", ignore, dname);
|
|
if (strlen(dname) < (size_t)8)
|
|
tab = 1;
|
|
} else {
|
|
(void) fprintf(dbfp, "%s\t", ignore);
|
|
tab = 1;
|
|
}
|
|
|
|
if (ttl != minimum_ttl)
|
|
(void) fprintf(dbfp, "%lu\t", (u_long) ttl);
|
|
else if (tab)
|
|
(void) putc('\t', dbfp);
|
|
|
|
(void) fprintf(dbfp, "%s\t%s\t", p_class(class), p_type(type));
|
|
cp = cdata;
|
|
|
|
/*
|
|
* Print type specific data
|
|
*/
|
|
switch (type) {
|
|
|
|
case T_A:
|
|
switch (class) {
|
|
case C_IN:
|
|
case C_HS:
|
|
GETLONG(n, cp);
|
|
n = htonl(n);
|
|
fputs(inet_ntoa(*(struct in_addr *) &n), dbfp);
|
|
break;
|
|
}
|
|
(void) fprintf(dbfp, "\n");
|
|
break;
|
|
|
|
case T_CNAME:
|
|
case T_MB:
|
|
case T_MG:
|
|
case T_MR:
|
|
case T_PTR:
|
|
if (cp[0] == '\0')
|
|
(void) fprintf(dbfp, ".\n");
|
|
else
|
|
(void) fprintf(dbfp, "%s.\n", cp);
|
|
break;
|
|
|
|
case T_NS:
|
|
cp = cdata;
|
|
if (cp[0] == '\0')
|
|
(void) fprintf(dbfp, ".\t");
|
|
else
|
|
(void) fprintf(dbfp, "%s.", cp);
|
|
(void) fprintf(dbfp, "\n");
|
|
break;
|
|
|
|
case T_HINFO:
|
|
case T_ISDN:
|
|
cp2 = cp + n;
|
|
for (i = 0; i < 2; i++) {
|
|
if (i != 0)
|
|
(void) putc(' ', dbfp);
|
|
n = *cp++;
|
|
cp1 = cp + n;
|
|
if (cp1 > cp2)
|
|
cp1 = cp2;
|
|
(void) putc('"', dbfp);
|
|
j = 0;
|
|
while (cp < cp1) {
|
|
if (*cp == '\0') {
|
|
cp = cp1;
|
|
break;
|
|
}
|
|
if (strchr("\n\"\\", *cp))
|
|
(void) putc('\\', dbfp);
|
|
(void) putc(*cp++, dbfp);
|
|
j++;
|
|
}
|
|
if (j == 0 && (type != T_ISDN || i == 0))
|
|
(void) putc('?', dbfp);
|
|
(void) putc('"', dbfp);
|
|
}
|
|
(void) putc('\n', dbfp);
|
|
break;
|
|
|
|
case T_SOA:
|
|
(void) fprintf(dbfp, "%s.", cp);
|
|
cp += strlen((char *) cp) + 1;
|
|
(void) fprintf(dbfp, " %s. (\n", cp);
|
|
cp += strlen((char *) cp) + 1;
|
|
GETLONG(n, cp);
|
|
(void) fprintf(dbfp, "%s\t\t%lu", ignore, (u_long)n);
|
|
GETLONG(n, cp);
|
|
(void) fprintf(dbfp, " %lu", (u_long)n);
|
|
GETLONG(n, cp);
|
|
(void) fprintf(dbfp, " %lu", (u_long)n);
|
|
GETLONG(n, cp);
|
|
(void) fprintf(dbfp, " %lu", (u_long)n);
|
|
GETLONG(n, cp);
|
|
(void) fprintf(dbfp, " %lu )\n", (u_long)n);
|
|
break;
|
|
|
|
case T_MX:
|
|
case T_AFSDB:
|
|
case T_RT:
|
|
GETSHORT(n, cp);
|
|
(void) fprintf(dbfp, "%lu", (u_long)n);
|
|
(void) fprintf(dbfp, " %s.\n", cp);
|
|
break;
|
|
|
|
case T_PX:
|
|
GETSHORT(n, cp);
|
|
(void) fprintf(dbfp, "%lu", (u_long)n);
|
|
(void) fprintf(dbfp, " %s.", cp);
|
|
cp += strlen((char *) cp) + 1;
|
|
(void) fprintf(dbfp, " %s.\n", cp);
|
|
break;
|
|
|
|
case T_TXT:
|
|
case T_X25:
|
|
cp1 = cp + n;
|
|
while (cp < cp1) {
|
|
(void) putc('"', dbfp);
|
|
if (i = *cp++) {
|
|
for (j = i; j > 0 && cp < cp1; j--) {
|
|
if (strchr("\n\"\\", *cp))
|
|
(void) putc('\\', dbfp);
|
|
(void) putc(*cp++, dbfp);
|
|
}
|
|
}
|
|
(void) putc('"', dbfp);
|
|
if (cp < cp1)
|
|
(void) putc(' ', dbfp);
|
|
}
|
|
(void) putc('\n', dbfp);
|
|
break;
|
|
|
|
case T_NSAP:
|
|
fprintf(dbfp, "%s\n", inet_nsap_ntoa(n, cp, NULL));
|
|
break;
|
|
|
|
case T_AAAA: {
|
|
char t[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255"];
|
|
|
|
fprintf(dbfp, "%s\n", inet_ntop(AF_INET6, cp, t, sizeof t));
|
|
break;
|
|
}
|
|
case T_UINFO:
|
|
(void) fprintf(dbfp, "\"%s\"\n", cp);
|
|
break;
|
|
|
|
#ifdef LOC_RR
|
|
case T_LOC: {
|
|
char t[255];
|
|
|
|
(void) fprintf(dbfp, "%s\n", loc_ntoa(cp, t));
|
|
break;
|
|
}
|
|
#endif /* LOC_RR */
|
|
|
|
case T_NAPTR: {
|
|
u_int order, preference;
|
|
|
|
/* Order */
|
|
GETSHORT(order, cp);
|
|
fprintf(dbfp, "%lu", (u_long)order);
|
|
|
|
/* Preference */
|
|
GETSHORT(preference, cp);
|
|
fprintf(dbfp, " %lu", (u_long)preference);
|
|
|
|
/* Flags */
|
|
if (n = *cp++) {
|
|
fprintf(dbfp, " \"%.*s\"", (int)n, cp);
|
|
cp += n;
|
|
}
|
|
|
|
/* Service */
|
|
if (n = *cp++) {
|
|
fprintf(dbfp, " \"%.*s\"", (int)n, cp);
|
|
cp += n;
|
|
}
|
|
|
|
/* Regexp */
|
|
if (n = *cp++) {
|
|
fprintf(dbfp, " \"%.*s\"", (int)n, cp);
|
|
cp += n;
|
|
}
|
|
|
|
/* Replacement */
|
|
fprintf(dbfp, " %s.\n", cp);
|
|
|
|
break;
|
|
}
|
|
case T_SRV: {
|
|
u_int priority, weight, port;
|
|
|
|
GETSHORT(priority, cp);
|
|
GETSHORT(weight, cp);
|
|
GETSHORT(port, cp);
|
|
fprintf(dbfp, "\t%u %u %u %s.\n",
|
|
priority, weight, port, cp);
|
|
break;
|
|
}
|
|
|
|
case T_UID:
|
|
case T_GID:
|
|
if (n == INT32SZ) {
|
|
GETLONG(n, cp);
|
|
(void) fprintf(dbfp, "%lu\n", (u_long)n);
|
|
}
|
|
break;
|
|
|
|
case T_WKS:
|
|
GETLONG(addr, cp);
|
|
addr = htonl(addr);
|
|
fputs(inet_ntoa(*(struct in_addr *) &addr), dbfp);
|
|
fputc(' ', dbfp);
|
|
proto = protocolname(*cp);
|
|
cp += sizeof(char);
|
|
(void) fprintf(dbfp, "%s ", proto);
|
|
i = 0;
|
|
while (cp < cdata + n) {
|
|
j = *cp++;
|
|
do {
|
|
if (j & 0200)
|
|
(void) fprintf(dbfp, " %s",
|
|
servicename(i, proto));
|
|
j <<= 1;
|
|
} while (++i & 07);
|
|
}
|
|
(void) fprintf(dbfp, "\n");
|
|
break;
|
|
|
|
case T_MINFO:
|
|
case T_RP:
|
|
(void) fprintf(dbfp, "%s.", cp);
|
|
cp += strlen((char *) cp) + 1;
|
|
(void) fprintf(dbfp, " %s.\n", cp);
|
|
break;
|
|
|
|
case T_KEY: {
|
|
char databuf[16+MAX_KEY_BASE64]; /* 16 for slop */
|
|
u_int16_t keyflags;
|
|
|
|
/* get & format key flags */
|
|
keyflags = _getshort(cp);
|
|
(void) fprintf(dbfp, "0x%04x ", keyflags);
|
|
cp += INT16SZ;
|
|
|
|
/* protocol id */
|
|
(void) fprintf(dbfp, " %u", *cp++);
|
|
|
|
/* algorithm id */
|
|
(void) fprintf(dbfp, " %u ", *cp++);
|
|
|
|
/* key itself (which may have zero length) */
|
|
n = b64_ntop(cp, (cp1 + n) - cp, databuf, sizeof databuf);
|
|
if (n < 0)
|
|
fprintf(dbfp, "; BAD BASE64\n");
|
|
else
|
|
fprintf(dbfp, "%s\n", databuf);
|
|
break;
|
|
}
|
|
|
|
case T_SIG: {
|
|
char databuf[16+MAX_KEY_BASE64]; /* 16 for slop */
|
|
|
|
/* get & format rr type which signature covers */
|
|
(void) fprintf(dbfp,"%s", p_type(_getshort((u_char*)cp)));
|
|
cp += INT16SZ;
|
|
|
|
/* algorithm id */
|
|
(void) fprintf(dbfp," %d",*cp++);
|
|
|
|
/* labels (# of labels in name) - skip in textual record */
|
|
cp++;
|
|
|
|
/* orig time to live (TTL)) */
|
|
(void) fprintf(dbfp," %lu", (u_long)_getlong((u_char*)cp));
|
|
cp += INT32SZ;
|
|
|
|
/* expiration time */
|
|
(void) fprintf(dbfp," %s", p_secstodate(_getlong((u_char*)cp)));
|
|
cp += INT32SZ;
|
|
|
|
/* time signed */
|
|
(void) fprintf(dbfp," %s", p_secstodate(_getlong((u_char*)cp)));
|
|
cp += INT32SZ;
|
|
|
|
/* Key footprint */
|
|
(void) fprintf(dbfp," %d", _getshort((u_char*)cp));
|
|
cp += INT16SZ;
|
|
|
|
/* signer's name */
|
|
(void) fprintf(dbfp, " %s. ", cp);
|
|
cp += strlen((char *) cp) + 1;
|
|
|
|
/* signature itself */
|
|
n = b64_ntop(cp, (cdata + n) - cp, databuf, sizeof databuf);
|
|
if (n < 0)
|
|
fprintf (dbfp, "; BAD BASE64\n");
|
|
else
|
|
fprintf (dbfp, "%s\n", databuf);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
cp1 = cp + n;
|
|
while (cp < cp1)
|
|
fprintf(dbfp, "0x%02.2X ", *cp++ & 0xFF);
|
|
(void) fprintf(dbfp, "???\n");
|
|
}
|
|
if (ferror(dbfp)) {
|
|
syslog(LOG_ERR, "%s: %m", tmpname);
|
|
cleanup_for_exit();
|
|
exit(XFER_FAIL);
|
|
}
|
|
return (result);
|
|
}
|
|
|
|
#ifdef SHORT_FNAMES
|
|
/*
|
|
** This routine handles creating temporary files with mkstemp
|
|
** in the presence of a 14 char filename system. Pathconf()
|
|
** does not work over NFS.
|
|
*/
|
|
filenamecpy(ddtfile, optarg)
|
|
char *ddtfile, *optarg;
|
|
{
|
|
int namelen, extra, len;
|
|
char *dirname, *filename;
|
|
|
|
/* determine the length of filename allowed */
|
|
if((dirname = strrchr(optarg, '/')) == NULL){
|
|
filename = optarg;
|
|
} else {
|
|
*dirname++ = '\0';
|
|
filename = dirname;
|
|
}
|
|
namelen = pathconf(dirname == NULL? "." : optarg, _PC_NAME_MAX);
|
|
if(namelen <= 0)
|
|
namelen = 255; /* length could not be determined */
|
|
if(dirname != NULL)
|
|
*--dirname = '/';
|
|
|
|
/* copy a shorter name if it will be longer than allowed */
|
|
extra = (strlen(filename)+strlen(".XXXXXX")) - namelen;
|
|
if(extra > 0){
|
|
len = strlen(optarg) - extra;
|
|
(void) strncpy(ddtfile, optarg, len);
|
|
ddtfile[len] = '\0';
|
|
} else
|
|
(void) strcpy(ddtfile, optarg);
|
|
}
|
|
#endif /* SHORT_FNAMES */
|