how can i access tsval from tcp options?

[Daniel H. Bahr]

Hello everyone,

I'm in need of accessing the tsval value of the options field in the
tcp header... i've been checking the tcp.h and did not find anything
that helped me.

Does any body know how to do it?

Best regards

[Denis Ovsienko]

Post by Daniel H. Bahr
Hello everyone,
I'm in need of accessing the tsval value of the options field in the
tcp header... i've been checking the tcp.h and did not find anything
that helped me.
Does any body know how to do it?

Greetings.

TCP options are a particular case of TLV class of encodings. This most likely implies that TCP options are opaque to libpcap. To access one or more TCP options it is necessary to have some code like that in tcpdump, print-tcp.c around line 500.

[Daniel H. Bahr]

Thanks, Denis, I'll check that out.

Post by Denis Ovsienko

Post by Daniel H. Bahr
Hello everyone,
I'm in need of accessing the tsval value of the options field in the
tcp header... i've been checking the tcp.h and did not find anything
that helped me.
Does any body know how to do it?

Greetings.
TCP options are a particular case of TLV class of encodings. This most
likely implies that TCP options are opaque to libpcap. To access one or more
TCP options it is necessary to have some code like that in tcpdump,
print-tcp.c around line 500.
--
Denis Ovsienko
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