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Wireshark-users: Re: [Wireshark-users] network monitor 3.4 traces cannot be read

From: "Stefaan Pouseele" <stefaan.pouseele@xxxxxxxxx>
Date: Thu, 22 Jul 2010 21:01:51 +0200
Hi Guy, 

attached you'll find a sample capture taken with Microsoft Network Monitor
3.4.

Best Regards,
Stefaan

-----Original Message-----
From: wireshark-users-bounces@xxxxxxxxxxxxx
[mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Guy Harris
Sent: donderdag 22 juli 2010 20:38
To: Community support list for Wireshark
Subject: Re: [Wireshark-users] network monitor 3.4 traces cannot be read


On Jul 22, 2010, at 10:23 AM, DePriest, Jason R. wrote:

> Why does the problem only affect the dev versions of Wireshark?

Because in 1.2.x, Wireshark ignored the per-packet encapsulation field in
newer file formats, whereas, in 1.3.x/1.4.x, it doesn't.  There are some
files, and some packets, that can't be correctly handled if the per-packet
encapsulation field is ignored (e.g., the frames where NetMon stores
information about the capture).

Microsoft's documentation on the file format doesn't mention the possibility
of a frame type being 0, so either

	1) the documentation is incomplete

or

	2) there's a bug and the frame type is being fetched from the wrong
location.

We'd need a capture file to distinguish between 1) and 2) to test a fix.
(I'll ask Paul Long of the NetMon group if there's a case where, for
example, the per-packet type will be 0.)
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Attachment: NetMon34.cap
Description: Binary data