Message-ID: <4479E2C5.90708@isotton.com>
Date: Sun, 28 May 2006 19:49:57 +0200
From: Aaron Isotton <aaron@isotton.com>
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To: LKML <linux-kernel@vger.kernel.org>
Subject: Dump the tcp_sock structure for every packet
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Hi,

I'm doing some kernel hacking to evaluate different TCP congestion
control algorithms in a WLAN mesh network.

I need to output some TCP parameters (such as window sizes et al) over
time; what I'd wish to do is outputting them to a character device
whenever a packet comes in/is sent.

I've written the device code, now I just need to output the parameters
using that device. The easiest way would be simply outputting the whole
tcp_sock structure to the device, and then reading it in from user space.=


The problem is that I don't know where exactly in the TCP implementation
the packets are transmitted/received, i.e. where I should send the data
over to the device implementation.

The ideal case would of course be some kind of callback/hook function; I
imagine there might be something like this for the netfilter modules,
but I have no idea.

Can anybody help me with this?

Thank you,
Aaron
--=20
Aaron Isotton | http://www.isotton.com/
I'll give you a definite maybe. --Samuel Goldwyn


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