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Date: Fri, 08 Mar 2013 16:44:22 +0200
From: Noel Grandin <noelgrandin AT gmail DOT com>
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Subject: Re: Unix domain accept() and getperrname() doesn't return the client address.
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On 2013-03-08 16:37, Corinna Vinschen wrote:
> On Mar  8 16:23, Noel Grandin wrote:
>> On 2013-03-08 15:29, Corinna Vinschen wrote:
>>> You can call connect on both sides. But ultimately you're right, I
>>> guess. I never thought about it that way, and it seems nobody used
>>> AF_LOCAL datagrams so far. Weird. The problem is that the
>>> underlying protocol is AF_INET because Windows doesn't support
>>> AF_LOCAL.
>> If you're using UDP as your underlying protocol, UDP already
>> contains a port you can reply to.
> Yes, but the port isn't available to the application which opened a
> AF_LOCAL connection.  If recvfrom returns an AF_INET name, it's rather
> tricky to convert it into an AF_LOCAL name for a subsequent sendto call.
>
> [...time passes...]
>
> Or... are you suggesting that recvfrom returns some kind of fake AF_LOCAL
> name, which can be converted back to AF_INET by sendto on the fly?

Yup, sorry, friday afternoon, not being very good with the explaining thing.

It's obviously a localhost connection, so we only need a way of stashing 
and retrieving the port number, not the host part.


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