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From: "Moshe Ashkenazi" <moshea@checkpoint.com>
To: <netfilter-devel@lists.netfilter.org>
Subject: libipq question
Date: Thu, 22 Apr 2004 11:04:49 +0200	[thread overview]
Message-ID: <002b01c42848$de0914f0$9b281dc2@luli> (raw)

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Hi, List -
 
I'm using QUEUE target in order to send TCP packets to user space, using
"IPQ_COPY_PACKET" I'm telling the kernel that I want the entire packet.
 
I know that the kernel send to user space the following structure
"ipq_packet_msg_t", and this structure include the payload member which
include the optional packet data.
 
When I'm examining the content of the payload array I see that it
include the following:
20 bytes IP header -> 20 bytes TCP header, and 20 bytes????
 
My questions are:
1.	What should the payload include?
2.	What are the last 20 bytes in the payload?
 
Example of payload array:
----- Optional packet data -----
45 10  0 3c f8 f8 40  0 3f  6 6f 64 c2 1d 28 90
c0 a8 27 f9 82 e7  4 d2 cf 1f 40 f5  0  0  0  0
a0  2 16 d0 f7 eb  0  0  2  4  5 b4  4  2  8  a
16 20 b8  d  0  0  0  0  1  3  3  0

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             reply	other threads:[~2004-04-22  9:04 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-04-22  9:04 Moshe Ashkenazi [this message]
  -- strict thread matches above, loose matches on Subject: below --
2004-06-25 20:12 libipq question Steve Ashley
2004-06-25 20:38 ` Pablo Neira
2004-06-25 23:56 ` Henrik Nordstrom
2003-05-15  4:42 Shirshanka Das
2003-05-23  8:22 ` Philip Ho

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