Re: follow-up: discrepancy with POSIX

On Wed, Sep 19, 2007 at 09:49:09AM -0700, Ulrich Drepper wrote:

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Andi Kleen wrote:

quoted

The standard way to undo connect is to use AF_UNSPEC. Code to handle
that for dgram sockets is there. It's the same code for v4 and v6.

I quoted the standard and it does not say anything about AF_UNSPEC.  So
you cannot simply make such broad statements.

Ok "standard" was perhaps a poor choice of words.

AF_UNSPEC used to be introduced long ago by Alan based on some early 
POSIX draft iirc.

Also incidentially it's a null address:

include/linux/socket.h:#define AF_UNSPEC        0

But the spec calls for a "null address" to be used and that's in my
understanding something different from using AF_UNSPEC.

memset(&sockaddr, 0, sizeof(sockaddr)) should give you AF_UNSPEC

-Andi