From: Asim Shankar <asimshankar@gmail.com>
To: Weber Matthias <weber@faps.uni-erlangen.de>
Cc: netdev@oss.sgi.com
Subject: Re: filtering packtes before OS takes care about them
Date: Mon, 28 Feb 2005 14:09:56 -0600 [thread overview]
Message-ID: <7bca1cb50502281209798e8a00@mail.gmail.com> (raw)
In-Reply-To: <09766A6E64A068419B362367800D50C0B58A17@moritz.faps.uni-erlangen.de>
> i need a possibility to catch IP4 packets (from ethernet devices) before OS' netmodules (IP, UDP, TCP, ICMP, ARP, ROUTE, NETFILTER ...) takes care about them and
> * to delete them from input buffer such that OS' netmodules can't receive them
> * to modify packet headers and move packets to interface related output buffers
> * to keep them in input buffers such that OS' netmodules can take care about them.
You can process packets even before ip_rcv() gets them by registering
your own packet handler (struct packet_type) using dev_add_pack(). I
have a small sample at:
http://limnos.csrd.uiuc.edu/notes/code-samples/samples/kernel/packet_type/packet_type_test.c
This may not be the cleanest way, but it isn't that dirty either.
Also see:
http://www.phrack.org/show.php?p=55&a=12
-- Asim
next prev parent reply other threads:[~2005-02-28 20:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-28 16:16 filtering packtes before OS takes care about them Weber Matthias
2005-02-28 17:38 ` bert hubert
2005-02-28 20:09 ` Asim Shankar [this message]
2005-03-01 0:30 ` Pedro Fortuna
2005-03-01 1:53 ` jamal
2005-03-01 3:35 ` Asim Shankar
2005-03-01 16:33 ` Pedro Fortuna
2005-03-05 14:08 ` Pedro Fortuna
2005-03-05 18:58 ` Asim Shankar
2005-03-05 19:36 ` Pedro Fortuna
[not found] ` <7bca1cb50503051729e3273d3@mail.gmail.com>
2005-03-06 2:04 ` Pedro Fortuna
2005-03-07 2:46 ` Pedro Fortuna
2005-03-01 17:20 ` Stephen Hemminger
-- strict thread matches above, loose matches on Subject: below --
2005-02-28 18:59 AW: " Weber Matthias
2005-03-01 0:26 ` Thomas Graf
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