I was never sold on the BASE_VALS_NO_UNKNOWN name, but I figured it was easy 
enough to search/replace if someone found something better.
I would consider BASE_SPECIAL_VALS an upgrade.
 
 
-----Original Message-----
From: Guy Harris <[email protected]>
To: Developer support list for Wireshark <[email protected]>
Sent: Mon, Apr 10, 2017 6:19 pm
Subject: Re: [Wireshark-dev] Change in wireshark[master]: Add support for 
BASE_VALS_NO_UNKNOWN

On Apr 10, 2017, at 1:31 PM, Michael Mann (Code Review) 
<[email protected]> wrote:

> Michael Mann has submitted this change and it was merged.
> 
> Change subject: Add support for BASE_VALS_NO_UNKNOWN
> ......................................................................
> 
> 
> Add support for BASE_VALS_NO_UNKNOWN
> 
> BASE_VALS_NO_UNKNOWN is a special value_string value for only a single
> (maybe 2) numerical value(s).  If a field has the numerical value
> that doesn't match anything in the value_string, just the number
> is supplied for the field (no "Unknown")
> 
> Dissectors that had this use case have been converted in the patch.

The use case for this appears to be for fields that normally have a numerical 
value, and where particular numerical values have no special significance, but 
where certain numerical values have a special meaning - for example, a field 
that's normally a timeout in milliseconds, but where a value of 0 means "time 
out immediately" and a value of 0xFFFFFFFF means "never time out".

Would a more descriptive name for it be something such as BASE_SPECIAL_VALS?
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