Date: Wed, 7 Oct 1998 16:18:42 +0100 (MET) From: Luigi Rizzo <luigi@labinfo.iet.unipi.it> To: andre.albsmeier@mchp.siemens.de (Andre Albsmeier) Cc: mike@smith.net.au, andre.albsmeier@mchp.siemens.de, hackers@FreeBSD.ORG Subject: Re: How to send data between two network cards directly? Message-ID: <199810071518.QAA08692@labinfo.iet.unipi.it> In-Reply-To: <199810071545.RAA02143@internal> from "Andre Albsmeier" at Oct 7, 98 05:45:26 pm
next in thread | previous in thread | raw e-mail | index | archive | help
> > > together via 10Base2. I would like to send data from one > > > machine two the other without doing IP or any other > > > protocol. ... > OK, maybe I desribed it in a wrong way. I would like to use > the most basic protocol that is available. No overhead, > no error correction, no nothing... ... > I have got two wireless-lan-like developer boxes. They got each an UTP > port and transmit data via a direct spread spectrum frequency hopping > protocol. We have two compare their performance, errors and reliabilty > with other, for example RS232 or S0 bus based, boxes. They run the ethernet > protocol (ok, this is the lowest level protocol, I have to use) and I would > like to transmit data without running TCP,UDP or something else. then for your purposes, UDP or raw ethernet packets are absolutely equivalent. if you really want to see things in detail you might try to disable UDP checksums (i think this is a socket-level option, isn't it ?) or even pass up bad frames from the ethernet driver (either use bpf, or play with the ethernet driver) cheers luigi -----------------------------+-------------------------------------- Luigi Rizzo | Dip. di Ingegneria dell'Informazione email: luigi@iet.unipi.it | Universita' di Pisa tel: +39-50-568533 | via Diotisalvi 2, 56126 PISA (Italy) fax: +39-50-568522 | http://www.iet.unipi.it/~luigi/ _____________________________|______________________________________ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199810071518.QAA08692>