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Re: datagram source port?

From: Eli Zaretskii
Subject: Re: datagram source port?
Date: Wed, 15 Jan 2020 18:27:38 +0200

> From: Robert Pluim <address@hidden>
> Cc: address@hidden,  address@hidden
> Date: Wed, 15 Jan 2020 10:49:33 +0100
> I took another quick look at this, and noticed that the windows port
> doesn't support datagram sockets at all, although the underlying
> Winsock does. Is there a reason for that?

This comment from nt/inc/ms-w32.h explains that:

  /* And the select implementation does 1-byte read-ahead waiting
     for received packets, so datagrams are broken too.  */

(Let me know if you want me to explain what it means by "1-byte
read-ahead".  Or just read the large commentary that starts around
line 870 of w32proc.c.)

I don't know enough about datagram sockets, but I hope you do, in
which case the above comment ought to be the answer.


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