[Winpcap-users] Access violation when using pcap_findalldevs_ex

[Gianluca Varenni]

Does the same problem happen with WinPcap 4.1beta5?

Can you send me the output of "windump -D"?

Have a nice day
GV
  ----- Original Message ----- 
  From: bsalibrici at scidyn.com 
  To: winpcap-users at winpcap.org 
  Sent: Tuesday, July 21, 2009 6:52 AM
  Subject: [Winpcap-users] Access violation when using pcap_findalldevs_ex




  Hello Everyone,

   

  I am using WinXP Professional SP3 and Microsoft Visual Studio 6.0 with SP5.



  I installed Winpcap version 4.0.2.

   

   I also got the WpdPack and compiled your 

  basic_dump example (in ...\WpdPack\Examples-pcap\basic_dump). The only thing

  I had to add to the visual c++ project was the IPHlpApi.Lib (6/16/1999 12:44 PM). 

  When I try to execute the app out of the debugger, it crashes

  at the call to pcap_findalldevs. I verified that the npf driver was running

  before I ran the app - and it was. Here is the error:

   

                  Unhandled exception in basic_dump.exe (NDISNPP.DLL): 0xC0000005: Access Violation. 

   

                  Call Stack: NDISNPP! 5a704d91()

   

   

  I searched your FAQs and your winpcap-users mailing list archives for this

  or similar problem. The only thing I found was a post back in August 2008

  where В. Rasta posted a similar problem. However, I didn't see a response

  or a resolution??

   

  Interestingly enough, I downloaded windump 3.9.5 and ran it with the -D option. 

  It listed all my adapters ok, and I selected an adapter with the -i option and it 

  captured packets ok. Here are the results I got for the -h option:

   

                  windump version 3.9.5, based on tcpdump version 3.9.5

   

                  WinPcap version 4.0.2 (packet.dll version 4.0.0.1040), based on libpcap version 0.9.5

   

   

  Here is some info for the NDISNPP.DLL I'm using:

   

  File Version: 5.1.2600.5512

   

  File Date: 4/13/08 8:12 PM

   

  File Size: 57,344 bytes

   

  File Location: C:\WINDOWS\system32\npp

   

   

  Attached is a screen shot of the debugger display for the crash.

   

  Any ideas as to what the problem is here with the basic_dump example?

  Perhaps I'm overlooking something simple.

  Thanks in advance for any help.

   

  Regards,

   

      --Bill Salibrici



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