From: Richard Dawe <rich AT phekda DOT freeserve DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: how did Quake do it???
Date: Fri, 02 Feb 2001 16:58:09 +0000
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To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Reply-To: djgpp AT delorie DOT com

Hello.

Sahab Yazdani wrote:
> 
> Richard Dawe wrote:
> >
> >     http://www.phekda.freeserve.co.uk/richdawe/dossock/
> >
> > The downside of using WSOCK2.VXD is that you have to patch it, to get
> > round a bug in its send()/recv() interface.
> >
> 
> okay, but it says in Gabor's readme that these bugs only apply to 16 bit
> applications, so this shouldn't apply to DJGPP should it???

No, not quite, if I understand it correctly. WSOCK2.VXD has to map the
selector:offset pairs you give it into the memory space it uses. For
send(), recv() it does not do it for enough parameters, which
unfortunately breaks it. I think this bug does not affect Winsock itself,
because it also goes through a DLL then a VxD to call WSOCK2.VXD, which
means the pointers are already mapped appropriately.

If you want a definite answer, you might want to search the archives of
the dossock mailing list, because I think Gabor gave an answer to this
question there. He also explained how Winsock 2 works - the different
DLLs, VxDs involved.

Bye,

-- 
Richard Dawe <richdawe AT bigfoot DOT com> http://www.bigfoot.com/~richdawe/ 

"The soul is the mirror of an indestructible universe."
--- Gottfried W. Leibniz