From owner-freebsd-hackers  Wed Aug  4  4:19:47 1999
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To: "Brian F. Feldman" <green@FreeBSD.ORG>
Cc: Mike Smith <mike@smith.net.au>,
	Matthew Dillon <dillon@apollo.backplane.com>,
	Ollivier Robert <roberto@keltia.freenix.fr>, hackers@FreeBSD.ORG
Subject: Re: Jail syscalls
References: <Pine.BSF.4.10.9908040319040.47190-100000@janus.syracuse.net>
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From: Assar Westerlund <assar@sics.se>
Date: 04 Aug 1999 13:18:24 +0200
In-Reply-To: "Brian F. Feldman"'s message of "Wed, 4 Aug 1999 03:19:57 -0400 (EDT)"
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"Brian F. Feldman" <green@FreeBSD.ORG> writes:
> On Tue, 3 Aug 1999, Mike Smith wrote:
> > 
> > Actually, with interfaces like this you should generally pass a pointer 
> > to the structure in userspace, and stick a version number constant in 
> > the beginning of the structure.  The size is often not enough of a 
> > determining factor...
> 
> Actually, the structure shouldn't change size because it should be
> using a sockaddr.

No, because sizeof(struct sockaddr) < sizeof(struct sockaddr_in6).
This is kind of bad but that's the way it is.  It would make sense to
use a `struct sockaddr_storage' but I still think it's worthwhile and
better to have a version number.

/assar


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