[Winpcap-users] Re: Winpcap-users Digest, Vol 25, Issue 14

[Hardik Shah]

try using entercriticalsection before starting anythread.if i m not wrong no two thread can access the same stuff at kernel level.
 
--------------------------------
  Hardik Shah
  mobile:- 9827634991
  phone:- +91-0731-2570516  


----- Original Message ----
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To: winpcap-users at winpcap.org
Sent: Friday, 20 April, 2007 5:30:50 PM
Subject: Winpcap-users Digest, Vol 25, Issue 14

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Today's Topics:

   1. Problem with threading (Avelino Martins)


----------------------------------------------------------------------

Message: 1
Date: Thu, 19 Apr 2007 21:18:42 +0000
From: Avelino Martins <martins_ajc at msn.com>
Subject: [Winpcap-users] Problem with threading
To: <winpcap-users at winpcap.org>
Message-ID: <BAY117-W18EBF90F0362E266B52C688C570 at phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

Hello all, 
despite all the threads i readed about issues on threading problems, i couldn't get to a conclusion at the specific issue of the function 
pcap_findalldevs() hanging when called from a child thread, take the simple example:
 
#include <pcap.h>
#pragma comment(lib, "Wpcap.lib")
 
void GetINetDevice()
{
     pcap_if_t* alldevs;
     char errbuf[PCAP_ERRBUF_SIZE+1];
 
     /* Retrieve the device list */
     if(pcap_findalldevs(&alldevs, errbuf) == -1)
     {
          printf("Error in pcap_findalldevs: %s\n", errbuf);
          exit(1);
     }
     // Could not create thread
     MessageBox(NULL, "Sucess","",MB_OK);
 
     // Free the device list 
     pcap_freealldevs(alldevs);
}
 
 
int main()
{ 
     DWORD m_dwThreadID;
     HANDLE m_hThread;
     m_hThread = CreateThread(0,
                                             0,
                                             (LPTHREAD_START_ROUTINE)GetINetDevice,
                                             NULL,
                                             0,
                                             &m_dwThreadID);
     if(!m_hThread)
     {
          // Could not create thread
          MessageBox(NULL, "Thread error","",MB_OK);
     }
     return 0;
}
 
Is anyone able to tell me if the fact of the app hangs/exits on pcap_findalldevs(), is a known issue at winpcap, and if there is any workaround?
 
Best Regards
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