From owner-freebsd-questions  Mon Feb 19 17:26:12 2001
Delivered-To: freebsd-questions@freebsd.org
Received: from xena.gsicomp.on.ca (cr677933-a.ktchnr1.on.wave.home.com [24.43.230.149])
	by hub.freebsd.org (Postfix) with ESMTP id 4C0F637B491
	for <freebsd-questions@FreeBSD.ORG>; Mon, 19 Feb 2001 17:26:00 -0800 (PST)
Received: from hermes (hermes.gsicomp.on.ca [192.168.0.18])
	by xena.gsicomp.on.ca (8.11.1/8.9.3) with SMTP id f1K1Nxi88682;
	Mon, 19 Feb 2001 20:24:00 -0500 (EST)
	(envelope-from matt@gsicomp.on.ca)
Message-ID: <003501c09adb$d1839230$1200a8c0@gsicomp.on.ca>
From: "Matthew Emmerton" <matt@gsicomp.on.ca>
To: "The Hermit Hacker" <scrappy@hub.org>,
	"Stephen Hovey" <shovey@buffnet.net>
Cc: <freebsd-questions@FreeBSD.ORG>
References: <Pine.BSF.4.33.0102192110310.1999-100000@mobile.hub.org>
Subject: Re: bind 9.1.1b2 ... "out of range" error ...
Date: Mon, 19 Feb 2001 20:24:05 -0500
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
X-Priority: 3
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook Express 5.50.4133.2400
X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

> On Mon, 19 Feb 2001, Stephen Hovey wrote:
>
> > Yeah - its not the 10800 thats puking - its the 'serial' number higher
up
> > - it wont take a number greater than 9999999999 in width. so yyyymmdd99
is
> > it for a pattern you can use
>
> okay, now my stupid question ... if I reduce the serial number 20010219nn,
> the serial number is now less then it was before ... won't this cause a
> problem?  I thought a change to serial had to be higher then what it was
> set to previously? :(

Yes, but there is a way around it.  Thanks to some properties of 2s
complement arithmetic, it is possible to construct a sequence of serial
numbers that will allow you to reduce the serial number.  What follows is a
C program that will provide an appropriate sequence of serial numbers that
will do the trick.  I used this program to fix up some DNS records that
accidentally got an extra 0 entered in the serial (for example,
20000010101 - try not to get cross-eyed counting the 0s!)

My apologies to the original author - I don't have the web site where I
found this code, as well as the very nice explanation of how and why it
works.

#include <stdlib.h>
#include <limits.h>
#include <stdio.h>

#define SEQ_GT(a,b)   ((long)((a)-(b)) > 0)
#define STEP 0x7fffffffUL

main(argc,argv)
int argc;
char **argv;
{
unsigned long t2;
unsigned long start, end;
char *e;

if (argc < 3)
exit(1);
start= strtoul(argv[1], &e, 10);
if (*e != '\0')
printf("bad start \"%s\"\n", argv[1]);
end = strtoul(argv[2], &e, 10);
if (*e != '\0')
printf("bad end \"%s\"\n", argv[1]);

t2 = start + STEP;

printf("%lu %lu", start, t2);
t2 += STEP;
while (SEQ_GT(end, t2)) {
printf(" %lu", t2);
t2 += STEP;
}
printf(" %lu\n", end);
exit(0);
}

--
Matt Emmerton



To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message