Ethereal-dev: [Ethereal-dev] referencing specific tcp protocol data

Note: This archive is from the project's previous web site, ethereal.com. This list is no longer active.

Date Index Thread Index Other Months All Mailing Lists
Date Prev Date Next Thread Prev Thread Next
From: Phil Williams <csypbw@xxxxxxxxxxxxxxxx>
Date: Mon, 25 Mar 2002 12:18:50 +0000 (GMT)
Hi

Quite a simple question I hope, I am trying to get to grips with the
source of this excellent tool.

For any packets I capture that are TCP, I wish to:

1. Firstly test if a packet is tcp, as I will have to loop through the
   whole capture file.
   - does pfd within the frame_data struct tell me what protocol a packet is
   and if so, and what value indicates tcp?

Looking at the code, it seems that protocol specific data is stored in
some tree like structure, which I can't seem to grasp.

2. I want to be able to get access to the sequence number and the header
   length of a tcp packet, as well as the length of the whole packet.
   (Obviously after I have determined that it is TCP)

Thanks in advance.

-- 
Phil Williams