[Winpcap-users] Deadlock on pcap_open_live() ?

[Dupuit Cyril]

Hello,

My application is used to sniff packets from ethernet like Wireshark.

I offer a choice to the user which interface to use to capture packets.
To do that, I use a specific thread used to compute some statistics to
help him to do the best choice (with a GTK based dialog box).

Sometimes, my application can send packets in a specific case (like
broadcast or multicast).

My application don't use directly COM objects but I am not shure that
GTK uses or not COM interface.

Hope that can help you to better understand my problem,

Cyril

Le 31/03/2010 17:18, Gianluca Varenni a écrit :
> Is your application COM based?
>
> Have a nice day
> GV
>
> --------------------------------------------------
> From: "Dupuit Cyril" <cyrildupuit at hotmail.com>
> Sent: Tuesday, March 30, 2010 2:28 PM
> To: <winpcap-users at winpcap.org>
> Subject: [Winpcap-users] Deadlock on pcap_open_live() ?
>
>   
>> Hello,
>>
>> I am developping an application that uses multiple threaded
>> environnement on Windows XP.
>>
>> One of these threads opens a network interface to count the number of
>> packets per second and compute statistics.
>>
>> This architecture works fine for a real network interface (ie realteck,
>> 3 com, ...) but fails with the first interface (Adapter for generic
>> dialup and VPN capture).
>>
>> I have made a little change on my code to use the same thread than my
>> application.
>> The result is good. My application works without deadlok.
>>
>> If I resume :
>> - Multithreaded :
>>     main thread                            Statistic thread
>>            -> Do something...                      -> pcap_open_live()
>> on the first interface (Adapter for generic dialup and VPN capture)
>>
>>  => Result is a deadlock in the pcap_open_live() function. The function
>> is blocked.
>>
>> - Single threaded :
>>    main thread
>>         -> pcap_open_live() on the first interface.
>>  => Result is an handle on the file openned (no deadlock detected).
>>
>> I have tried this solution only on WinPcap 4.1.1. I don't know if this
>> problem appears in another version of WinPcap.
>>
>> Can you help me ?
>>
>> Thank you in adavance,
>>
>> Cyril
>>
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>> Winpcap-users at winpcap.org
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>>     
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