[Winpcap-users] Deadlock on pcap_open_live() ?

Dupuit Cyril cyrildupuit at hotmail.com
Thu Apr 1 12:49:59 PDT 2010 

Thank you,

The file "TestForWinPcap.7z" is uploaded.

Cyril

Le 01/04/2010 21:41, Gianluca Varenni a écrit :
>
> --------------------------------------------------
> From: "Dupuit Cyril" <cyrildupuit at hotmail.com>
> Sent: Thursday, April 01, 2010 12:12 PM
> To: <winpcap-users at winpcap.org>
> Subject: Re: [Winpcap-users] Deadlock on pcap_open_live() ?
>
>   
>> Hello,
>>
>> I am sorry, I am unable to send you directly the binary. Each time the
>> message is filtered !
>>     
> Is it filtered by your mail server? Please upload it to
>
> ftp://www.winpcap.org/pub/incoming
>
> The folder is write only, once you have uploaded it you cannot check that 
> the file has been uploaded correctly.
>
> Have a nice day
> GV
>
>
>   
>> If the source code is too complicated, I can try to give you a better
>> example (without GTK, i.e directly in command line).
>>
>> Best regards,
>>
>> Cyril
>>
>> Le 01/04/2010 00:16, Gianluca Varenni a écrit :
>>     
>>> binary is ok. If it gets blocked, please send it directly to me
>>> (gianluca.varenni AT cacetech.com)
>>>
>>> GV
>>>
>>> --------------------------------------------------
>>> From: "Dupuit Cyril" <cyrildupuit at hotmail.com>
>>> Sent: Wednesday, March 31, 2010 3:00 PM
>>> To: <winpcap-users at winpcap.org>
>>> Subject: Re: [Winpcap-users] Deadlock on pcap_open_live() ?
>>>
>>>
>>>       
>>>> Yes, I am able to create a small application that is able to show this
>>>> issue but I am not sure what you need :
>>>> - Source code (a bit ugly...)
>>>> - Binary (no, it's filtered, sorry !)
>>>>
>>>> I give you an archive in 7z file format that contains the source code
>>>> but it's impossible to give you the binary file.
>>>>
>>>> This small application opens a dialog box. You need to select your
>>>> interface (the first by default) and click OK.
>>>>
>>>> The function pcap_open_file() is called in another thread and the
>>>> application is locked.
>>>>
>>>> Hope that can help you.
>>>>
>>>> If you have some problems to use this simple application (GTK
>>>> dependancies, ...) or if the 7z file is filtered, don't hesitate to
>>>> contact me.
>>>>
>>>> Thank you in advance,
>>>>
>>>> Cyril
>>>>
>>>>
>>>>
>>>> Le 31/03/2010 19:22, Gianluca Varenni a écrit :
>>>>
>>>>         
>>>>> I suspect that it's one of the bugs present in Microsoft NetMon, the 
>>>>> COM
>>>>> component that we use under the hoods to sniff from dialup/VPN
>>>>> connections.
>>>>>
>>>>> Are you able to create a small GTK based application showing the issue?
>>>>> I'd
>>>>> like to test it here.
>>>>>
>>>>> Have a nice day
>>>>> GV
>>>>>
>>>>>
>>>>>
>>>>> --------------------------------------------------
>>>>> From: "Dupuit Cyril" <cyrildupuit at hotmail.com>
>>>>> Sent: Wednesday, March 31, 2010 9:58 AM
>>>>> To: <winpcap-users at winpcap.org>
>>>>> Subject: Re: [Winpcap-users] Deadlock on pcap_open_live() ?
>>>>>
>>>>>
>>>>>
>>>>>           
>>>>>> 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
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> Winpcap-users mailing list
>>>>>>>> Winpcap-users at winpcap.org
>>>>>>>> https://www.winpcap.org/mailman/listinfo/winpcap-users
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>                 
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>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>               
>>>>>> _______________________________________________
>>>>>> Winpcap-users mailing list
>>>>>> Winpcap-users at winpcap.org
>>>>>> https://www.winpcap.org/mailman/listinfo/winpcap-users
>>>>>>
>>>>>>
>>>>>>             
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>>
>>>>>
>>>>>           
>>>>
>>>>         
>>>
>>>
>>>       
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