Wireshark-bugs: [Wireshark-bugs] [Bug 4014] New: ICMP: Add ID and seq # to Info column
Date: Tue, 15 Sep 2009 10:25:26 -0700 (PDT)

           Summary: ICMP: Add ID and seq # to Info column
           Product: Wireshark
           Version: SVN
          Platform: All
               URL: http://en.wikipedia.org/wiki/Ping
        OS/Version: All
            Status: NEW
          Severity: Enhancement
          Priority: Medium
         Component: Wireshark
        AssignedTo: [email protected]
        ReportedBy: [email protected]

Chris Maynard <[email protected]> changed:

           What    |Removed                     |Added
   Attachment #3657|                            |review_for_checkin?
               Flag|                            |

Created an attachment (id=3657)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=3657)
Patch to display ICMP ID and seq # in Info column.

Build Information:
SVN 29893
This trivial patch merely displays the ICMP ID and sequence # in the Info

Additional information could be displayed as well, similar to what Ping
displays.  For example:
1) On Windows ping displays "bytes=XX".  I was going to add that to the Info
column display as well using tvb_reported_length_remaining(); however, I guess
that probably wouldn't work too well in the case of fragmented packets, so I
decided not to add it. 

2) On Linux, ping displays "ttl=XX".  Displaying the TTL (or Hop count)
requires passing that information from the IP dissector to the ICMP dissector. 
That would either require adding that information to the already large
packet_info struct or use of private_data to pass it.  There have been
discussions about the use of packet_info, and the bottom line is that I'm not
sure what the best way is to pass data from one dissector to another, so I
didn't add that either.  (See
http://www.wireshark.org/lists/wireshark-dev/200903/msg00001.html for one such

3) Both Windows and Linux ping display RTT as "time=XX".  For that,
request/response tracking is probably the best method, as mentioned here:
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=3950#c5.  Currently I don't
have the time to implement this though and I don't know when I will.

Anyway, this simple patch at least eliminates the need for custom column(s) to
display the ID and/or seq #.

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