[WinPcap-users] problem receiving packets, packetReceivePacket problem

[Annie Deroo]

I have a problem receiving packets in my main capture loop. I call the ListenThread function from my program and start a new thread (it's not the thread that causes the problem, I still have the problem without it). The function packetReceivePacket(m_lpAdapter,lpPacket,TRUE) gives signals that I receive packets even when there aren't any packets send (I'm sure no packets are send, I watch the traffic with Ethereal), even when my computer is disconnected from any network, it still gives signals! The code is written under Visual C++ maybe that's a problem??? My adapter is good initialated, I can send packets (Ethereal shows them). So my question is: what's going wrong??? and of course, how do I solve this! Thank U.   AfxBeginThread(ListenThread,this);   UINT CPIGDlg::ListenThread(LPVOID pParam) {  CPIGDlg * dlg = (CPIGDlg *) pParam;  dlg->ListenThread();  return 0; }   void CPIGDlg::ListenThread() {  LPPACKET   lpPacket;  char buffer[256000];    if (!m_lpAdapter || (m_lpAdapter->hFile == INVALID_HANDLE_VALUE))  {   AfxMessageBox("Unable to open the adapter");  }     // set the network adapter in promiscuous mode  if(PacketSetHwFilter(m_lpAdapter,NDIS_PACKET_TYPE_PROMISCUOUS)==FALSE){    AfxMessageBox("Warning: unable to set promiscuous mode!\n");  }    // set a 512K buffer in the driver  if(PacketSetBuff(m_lpAdapter,512000)==FALSE){    AfxMessageBox("Unable to set the kernel buffer!\n");  }    // set a 1 second read timeout  if(PacketSetReadTimeout(m_lpAdapter,1000)==FALSE){    AfxMessageBox("Warning: unable to set the read tiemout!\n");  }    //allocate and initialize a packet structure that will be used to  //receive the packets.  if((lpPacket = PacketAllocatePacket())==NULL){   AfxMessageBox("\nError: failed to allocate the LPPACKET structure.");  }  PacketInitPacket(lpPacket,(char*)buffer,256000);    //main capture loop  while(true)  {      // capture the packets   if(PacketReceivePacket(m_lpAdapter,lpPacket,TRUE)==FALSE){    MessageBox("Error: PacketReceivePacket failed");   }   else{    AfxMessageBox("packet captured");   }  }    PacketFreePacket(lpPacket);  // close the adapter and exit  PacketCloseAdapter(m_lpAdapter); }