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Old 01-19-2009, 04:09 PM   #1
ycli
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Registered: Jan 2009
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Question how to tcp seq from skb


I am trying to write a kernel program which needs to get tcp's seq value from sk_buff struct (skb). I did it with the following code:

struct tcphdr * mytcphdr = (struct tcphdr *) tcp_hdr(skb);
if(mytcphdr)
{
unsigned long tcpseq = ntohl(mytcphdr->seq);
}

However, the tcpseq values obtained this way are incorrect (I got the true values from "wireshark" program). Please let me know where it is wrong with the code? Thank you very much in advance.

By the way, I am with kernel 2.6.27.


ycli
 
Old 01-19-2009, 04:22 PM   #2
unSpawn
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Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread should be closed because it is a duplicate of http://www.linuxquestions.org/questi...om-skb-698442/.

Next time please use the edit button or ask a moderator to modify your post if you can't, OK?
 
  


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