Re: tcp sequence and ack number with libpcap

[Andrej van der Zee <andrejvanderzee () gmail com>]

Hi,



>  const struct tcphdr * tcp_hdr = (const struct tcphdr *)(sp + ETHER_HDRLEN
> > + IP_HL(ip));
> >
> > This is surely wrong.
> > The size of the IP header is IP_HL(ip)*4  not IP_HL(ip)
> Thank you very much! Now I do get the same seq  and ack number for my app
> and tcpdump -vv.
Though, unfortunately I turn out to need the relative sequence and ack
number. How do I get those?

Thank you,
Andrej
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