Wireshark-users: Re: [Wireshark-users] Support for GTP Version
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From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Tue, 10 Aug 2010 11:32:33 -0700
On Aug 10, 2010, at 11:06 AM, Anders Broman wrote:

> Sabyasachi Samal skrev 2010-08-10 19:06:
>> Thanks for the reply. My question is generic one. Suppose i want to know the supported version of any protocol is there any way to know that. From the supported protocol list we can know only the protocol name those are supported but not the version.
>> 
>> So is there any way to know the version?
> Not really, unless the person(s) submitting dissectors or updates puts the protocol version in a comment or in the bug/commit message.
> Often updates are related to only specific IEs or parts of protocols so I suppose lots of protocols with frequent updates ( like the 3GPP ones) may only be partly compliant to any specific release. For the ASN1 based protocols the version is available in the ASN1 sources.  On the other hand I do not know to what extent the 3GPP protocols changes between minor releases.
> As there is a lot of Wireshark users in the Telecom world I would imagine that we'd receive bug reports if there was major problems
> with any protocol decode. You may have to be prepared to use the development version to have the most up to date protocol decode.

And, for some protocols, there may be more than just a version number involved - saying that the IPv6 dissector supports version 6 is sort of a no-brainer, but what somebody might really want to know is "does it support the options in RFC XXXX?" for some value of XXXX.