Find ACK for my packet?

[<jayrturner99 () gmail com>]

I have a dissector whose protocol is under TCP/IP. When I identify a packet, I would like to find the frame that is the 
ACK for my PSH,ACK packet. My goal is to find the abs_tm value of the ACK packet and use that as a starting time of 
host processing, instead of using the abs_tm of my packet, since that would include the network latency.

While dissecting, the tcpinfo data has lastackseq, but not a frame number. There is a tcp_acked structure, but I don't 
know how to locate it. The ACK frame's SEQ Analysis says what frame it is ACKing, but the SEQ Analysis of my frame 
doesn't point to the ACK. And I can't create a dissector to look for it because the ACK frame has no TCP payload, so it 
won't call a dissector.

Is there some way I can locate the ACK frame of a packet and look at its abs_tm value?

Thank you,
Jay Turner

___________________________________________________________________________
Sent via:    Wireshark-dev mailing list <wireshark-dev () wireshark org>
Archives:    https://www.wireshark.org/lists/wireshark-dev
Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev
             mailto:wireshark-dev-request () wireshark org?subject=unsubscribe