From: Jeff Woods <Kazrak+kernel@cesmail.net>
To: Lee <linuxtwidler@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Serial Port Sniffing
Date: Fri, 28 Oct 2005 22:28:28 -0600 [thread overview]
Message-ID: <6.2.3.4.0.20051028222139.03ff2fa0@no.incoming.mail> (raw)
In-Reply-To: <20051028132417.6d3dc843@localhost>
At 10/28/2005 13:24 -0500, Lee <linuxtwidler@gmail.com> wrote:
>Does anyone have any experience with sniffing data from a serial
>port w/o the device attached to the serial port or the application
>having knowledge of this ?
>
>I had found an old kernel module (for 2.2.0, i think) called 'maxty'
>which would does this. Is there something equivalent for the 2.6.x kernels ?
>
>Or is there a better way to go about doing this?
Don't know about software sniffing but hardware sniffing of RS-232 is
relatively simple. Splice in a "Y" cable and configure a serial port
of another device to listen. Of course, you'll have to configure the
serial port to the same rate, parity and stop bits but that's usually
easy. Cut the transmit wire on the sniffer side to ensure nothing
outbound succeeds in leaving the sniffer machine. Listening to both
sides of the conversation would require two sniffer devices, or at
least two serial ports.
--
Jeff Woods <kazrak+kernel@cesmail.net>
prev parent reply other threads:[~2005-10-29 4:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-10-28 18:24 Lee
2005-10-29 4:28 ` Jeff Woods [this message]
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