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