[Coco] Fwd: IP packets on my coco

Brett Gordon beretta42 at gmail.com
Sun Jun 5 12:36:57 EDT 2016

It has been a slow news week on the list so I thought I would leak some
exciting Fuzix development stuff here.  Here's hope for actual real-mccoy
networking for the CoCo.


Brett M Gordon
---------- Forwarded message ----------
From: "Brett Gordon" <beretta42 at gmail.com>
Date: Jun 5, 2016 12:24 PM
Subject: IP packets on my coco

> Last week, I compiled the new lwwire spec code.  The spec keeps the
drivewire stuff that works and throws the broken stuff out. Yesterday, I
hacked up an extension to the drivewire protocol to present a Linux tun
iface to the coco.  On the coco side, I used the proposed dw_transaction()
ioctl to receive IP packets.  A small forth program later, fuzix was
receiving and displaying ping and tcp syn packets from linux.  I haven't
tested the sending of IP packets yet, but it's coded.   I'm thinking of
trying to compile Adam Dunkle's uIP and see if I can ping fuzix from
linux.  If it fails, at least there will be a link layer ready for Alan.
And dw_transaction() allows this to happen in user-space - right where
fuzix wants its native TCP/IP stack.  From my research, uIP takes 4-5k of
code, and one modest sized packet buffer.  The uIP-TCP/kernel iface will
need additional send buffering to make it work like BSD sockets expect.
> Any bets on ping reponse times? ;)
> Brett M Gordon

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