From:	George Foot <mert0407 AT sable DOT ox DOT ac DOT uk>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: TCP with DJGPP?
Date:	22 Apr 1998 21:31:13 GMT
Organization:	Oxford University, England
Lines:	49
Message-ID:	<6hlnj1$o50$1@news.ox.ac.uk>
References:	<353E5477 DOT E15931FB AT usa DOT net>
NNTP-Posting-Host:	sable.ox.ac.uk
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

On Wed, 22 Apr 1998 20:38:48 GMT in comp.os.msdos.djgpp Paul
Derbyshire <pderbysh AT usa DOT net> wrote:

: I recallsomeone making a TCP stack for DJGPP apps, but I don't have the URL
: handy, what was it again? Note: as I recall it was Win32-independent.

TCPLIB?  WatTCP?  I'm not sure, I haven't used these; DJ Delorie used
TCPLIB to make a port to DOS of Lynx IIRC.

: There is also a separate one that allows DJGPP apps to use a VXD to send and
: receive TCP packets while in Win 95 and while W95 was connected to the
: network/Internet. What was its URL?

There are several to do this.  The first was Dan Hedlund's WSOCK
library, which is C++.  Indrek Mandre has released a similar library,
libsocket, which is plain C, which provides BSD socket routines.  I
haven't used Indrek's library though.  I made a very small library,
which was a C version of Dan's library.  It only implements a subset
of the Winsock functions, which are fairly BSD-like.

I believe TCPLIB, WatTCP, libsocket and WSOCK are all linked from DJ
Delorie's external djgpp links page:

  http://www.delorie.com/djgpp/dl/elsewhere.html

This page is a good place to look for programs if you've forgotten
where they are.  SET's links page is an even better place, but I can
never remember where that is.  There's a link to it from Allegro's
links page.

Dan's library has a small bug that causes a bad memory write; you
might want to patch this if you use his library.  In the function to
call the VxD (located in wsock.c I think) there's a block of inline
assembler containing the command:

     andl %%eax, 0x0000ffff

Change that command to:

     andl $0x0000ffff, %%eax

I don't know whether Indrek's library has the same problem.

(Note: TCP is streamed; you don't send and receive packets directly.)

-- 
george DOT foot AT merton DOT oxford DOT ac DOT uk

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