Wireshark-dev: [Wireshark-dev] manual address resolution is broken
From: Ed Beroset <[email protected]>
Date: Thu, 23 May 2013 15:05:05 +0000 (GMT+00:00)
Today I was analyzing some capture files and wanted to use manual name resolution to make things a little to interpret, but I found out that manual name resolution no longer works.  The bug has already been reported https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=8462 and a patch submitted, but I'm not sure that patch is the right way to resolve things since it basically undoes (incompletely) a deliberate change that was done some months ago: http://anonsvn.wireshark.org/viewvc?view=revision&revision=45511

In my particular case, I have multiple capture files of traffic between the same two points and so it would actually be convenient in my case for the manual address resolution to persist between capture files.  On this particular machine, I have root privileges, and so could edit the hosts file, but we can't count on that for most people.  

Before I change the code, I think it would be useful to agree on desired behavior first.  At the moment, it's clearly broken because right after a manual name is entered, it's erased again by the call to host_name_lookup_cleanup() in epan/packet.c before the resolution is invoked again.  Here are three possible options:

1. have manually entered host names persist for the duration that Wireshark is running
2. have them persist only until another capture is begun or capture file entered
3. have a name resolution table that's stored as a persistent setting per configuration profile

Variations might include: for option 2 dialog that asks, if there is a non-empty list, whether to keep or dump the names; or for option 1, have a manual means to dump all manually entered host names.

My inclination would be for option 2 be the default, but with option 1 being available as a configuration checkbox.  What say you all?

Ed