Date: Thu, 27 Jun 2002 11:20:03 -0700 (PDT) From: "Crist J. Clark" <crist.clark@attbi.com> To: freebsd-bugs@FreeBSD.org Subject: Re: bin/39896: netmask 0xffffff00 no longer works in /etc/exports Message-ID: <200206271820.g5RIK3fA094634@freefall.freebsd.org>
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The following reply was made to PR bin/39896; it has been noted by GNATS.
From: "Crist J. Clark" <crist.clark@attbi.com>
To: Ian Dowse <iedowse@maths.tcd.ie>
Cc: FreeBSD-gnats-submit@FreeBSD.ORG,
"Jin Guojun[DSD]" <j_guojun@lbl.gov>
Subject: Re: bin/39896: netmask 0xffffff00 no longer works in /etc/exports
Date: Thu, 27 Jun 2002 11:18:01 -0700
On Thu, Jun 27, 2002 at 06:59:01PM +0100, Ian Dowse wrote:
> In message <200206271730.g5RHU3PL084959@freefall.freebsd.org>, "Crist J. Clark"
> writes:
> > Sorry. Wrong cut-n-paste. I did use 0xffffff00 and it seemed to work
> > fine. When did you notice a change? src/sbin/mountd/mountd.c hasn't
> > changed since 4.4-RELEASE. I can't see anything that deals with
> > reading the netmask that has changed since 1998. The mask is actually
> > read with the inet_network(3) function, and I see no significant
> > changes in that for several years either.
>
> I'm not sure how this could have ever worked correctly, since
> inet_network(3) does not support hex addresses of this form.
Actually, it does. The manpage says,
All numbers supplied as ``parts'' in a `.' notation may be decimal,
octal, or hexadecimal, as specified in the C language (i.e., a leading 0x
or 0X implies hexadecimal; otherwise, a leading 0 implies octal; other-
wise, the number is interpreted as decimal).
And since it is perfectly valid to provide an internet address as a
single "part," an address like 0xffffff00 is totally valid by these
rules. To illustrate this, all of these are the same IP address,
0xffffff00
4294967040
0xff.0xffff00
255.16776960
0xff.0xff.0xff00
255.255.65280
0xff.0xff.0xff.0x0
255.255.255.0
--
Crist J. Clark | cjclark@alum.mit.edu
| cjclark@jhu.edu
http://people.freebsd.org/~cjc/ | cjc@freebsd.org
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