From: rajat swarup <rajats@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: sending ICMP messages in kernel module
Date: Fri, 6 May 2005 22:00:17 -0700 [thread overview]
Message-ID: <7d04ec5605050622006f3ad56c@mail.gmail.com> (raw)
Hi,
I have placed a netfilter hook in which I grab the packets in the
pre-routing stage.
I need to send ICMP messages in response to certain messages in this hook.
I looked at alloc_skb(), skb_reserve() and skb_put() functions but it
is still not clear to me as to how to construct the packets using
these methods.
Since I am getting the packets in the Pre-routing stage should I
explicitly construct the MAC header, IP header & data & ICMP message?
Also, I'll need to calculate the checksum to be transmitted in the
ICMP packet...which method could I use to do that?
Any help will be really appreciated!
Thanks and regards,
Rajat.
http://rajatswarup.blogspot.com/
next reply other threads:[~2005-05-07 5:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-07 5:00 rajat swarup [this message]
2005-05-07 22:17 ` J. Scott Kasten
2005-05-07 23:39 ` rajat swarup
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