[Winpcap-users] WinPcap 3.1/WinPcap 3.1 beta

Gianluca Varenni gianluca.varenni at cacetech.com
Mon May 8 19:16:02 GMT 2006

----- Original Message ----- 
From: "Steev H." <steev at ifrance.com>
To: <winpcap-users at winpcap.org>
Sent: Monday, May 08, 2006 11:24 AM
Subject: [Winpcap-users] WinPcap 3.1/WinPcap 3.1 beta

> Hi,
> I'm having a funny problem :)
> I am building a small application that snoops the network with
> WinPCap.
> For that, I downloaded the "WinPcap 3.1 Developer's Pack" couple of
> days ago, and I used it within my application.
> This works on my development machine, but I then wanted to test on a
> separate machine that had WinPcap 3 beta 1 installed.

Uhm, do you refer do WinPcap 3 beta 1 released in February 2003???

> This worked, but as I used the 3.1 "final" APIs I decided to migrate
> to WinPcap 3.1 "final". My application is now crashing at startup and then
> this is what I get in the Microsoft Event Log:
> Event Type: Error
> Event Source: .NET Runtime 2.0 Error Reporting
> Event Category: None
> Event ID: 1000
> Date: 08/05/2006
> Time: 4:50:01 PM
> User: N/A
> Computer: MYCOMPUTER
> Description:
> Faulting application myapp.exe, version, stamp 445f0520, faulting
> module wpcap.dll, version, stamp 42efe335, debug? 0, fault 
> address
> 0x0001a220.
> For more information, see Help and Support Center at
> http://go.microsoft.com/fwlink/events.asp.
> I tried on multiple machines and I have the same problem on every
> machine :-(

So your app is compiled against the 3.1 devpack, and it crashes on every 
machine where WinPcap 3.1 is installed?

> So there are two possibilities:
> * The API is not up to date (and works with 3.1 beta but not
> with the final version),

Uhm, I seriously doubt so. There are no breaking changes in the API that 
would cause such problems (and in any case you cannot have such issues if 
you use devpack 3.1 *with* winpcap 3.1). Which API are you using? pcap or 
Are you able to debug the issue (or at least have a trace) on the faulting 
machines, and understand exactly which function is crashing?

> * The beta version did not successfully un-install.
> From my experiments, I would say this is the first option, as I
> downloaded WinDump and successfully snooped network traffic...
> Can anyone confirm that? Can anyone check that the sources available
> on the download site are the proper one?

I double checked on the server, and they are the proper ones.

Have a nice day

> Does anyone have other ideas (on how to fix, or what to check?)
> Thanks in Advance,
> Steeve
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