Grabbing Sequence Numbers of a tcp-packet

Is there any way to use the tcpdump command in such a way to capture only the sequence numbers(or in fact grab it) of the packets and store it in a variable? I need to do this from inside a C++ program. Any help appreciated.

(I am using nemesis-tcp to send the packets from one system and tcpdump command to capture these packets at the receiver)

Answers


You can use the pcap library and the official walk-through is a very good introduction. Especially look at the seq in tcp_header.


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