netdev - Re: Undefined behaviour of connect(fd, NULL, 0);

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Message-ID: <m21vetc1d8.fsf@igel.home>
Date:	Mon, 05 Apr 2010 18:25:55 +0200
From:	Andreas Schwab <schwab@...ux-m68k.org>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Changli Gao <xiaosuo@...il.com>,
	David Miller <davem@...emloft.net>, neilb@...e.de,
	shemminger@...tta.com, netdev@...r.kernel.org
Subject: Re: Undefined behaviour of connect(fd, NULL, 0);

Eric Dumazet <eric.dumazet@...il.com> writes:

> Solaris man page extract :
>
> "Datagram sockets can dissolve the association by connecting to a null
> address."
>
> What is a null address ? 
>
> 1) A null pointer ? 
> 2) a pointer to a zone, but length of this zone is 0
> 3) Or a pointer to a zone filled with NULL bytes ?

Btw., POSIX.1 has changed the description from "If address is a null
address for the protocol, the socket's peer address shall be reset" in
the 2004 edition to "If the sa_family member of address is AF_UNSPEC,
the socket's peer address shall be reset" in the 2009 edition.

Andreas.

-- 
Andreas Schwab, schwab@...ux-m68k.org
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