From owner-freebsd-hackers  Wed Aug  4 10:13: 2 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.4.10.9908041251530.55682-100000@janus.syracuse.net>
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From: Assar Westerlund <assar@sics.se>
Date: 04 Aug 1999 19:13:30 +0200
In-Reply-To: "Brian F. Feldman"'s message of "Wed, 4 Aug 1999 12:59:44 -0400 (EDT)"
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"Brian F. Feldman" <green@FreeBSD.org> writes:
> As I read it, sockaddr is a transparent type (overloaded, as it were).
> So we would use something like:
> 	struct jail {
> 		...
> 		struct sockaddr;
> 		char [SOCK_MAXADDRLEN - sizeof(struct sockaddr)];
> 		char [sizeof(int) - SOCK_MAXADDRLEN % sizeof(int)];/* padding */
> 		...
> 	}

Yes, that would work, as would:

union {
	struct sockaddr sa;
	struct sockaddr_storage ss;
} u;

I was just trying to say that not all socket addresses fit into a
`struct sockaddr' but they should fit into a `struct
sockaddr_storage'.

/assar


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