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6.6

NDISUIO_NOTIFICATION_MEDIA_CON­NECT/DISCONNECT problem

Asked by maghcc in Programming for 802.11x Wireless Standard

hi Expert:

I want to detect the NIC media status when connection states change.
So register the notification of NDISUIO_NOTIFICATION_MEDIA_CONNECT and
NDISUIO_NOTIFICATION_MEDIA_DISCONNECT.


When I power off access point , display message as below:

Media disconnected. --> correct
Media connect.       --> ??
Media disconnected.
Media connect.


I don't know what's happen?
Why the status of media by connected that has detected ?
What's wrong about my code ?


My platform is pocket pc 2003.


//initialization
hThread = CreateThread(NULL,0,DoWaitNotifThread,hWnd,0,(DWORD *)&rc);


DWORD WINAPI DoWaitNotifThread(PVOID pArg)
{
        HWND    hWnd;
        HANDLE  hMsgQueue = NULL;
        HRESULT         hr = S_OK;
        // Create the ndis message queue
        MSGQUEUEOPTIONS msgQueueOptions = {0};
        NDISUIO_REQUEST_NOTIFICATION ndisRequestNotification = {0};
        NDISUIO_DEVICE_NOTIFICATION     sDeviceNotification;
        DWORD   dwBytesReturned;
        DWORD   dwFlags;
        TCHAR   szOut[MAX_BUFFER_LENGTH];


        hWnd = (HWND)pArg;


        hr = HandleCurrentDevices();
        if(FAILED(hr))
        {
                wcscpy(szOut,TEXT("Could not handle initial Ndis devices"));
                SendMessage(hWnd,MYMSG_ADDLINE,-1,(LPARAM)szOut);
                return -1;
        }


  do{
           msgQueueOptions.dwSize       = sizeof(MSGQUEUEOPTIONS);
           msgQueueOptions.dwFlags      = 0;
           msgQueueOptions.dwMaxMessages        = 25;
           msgQueueOptions.cbMaxMessage= sizeof(NDISUIO_DEVICE_NOTIFICATION);
           msgQueueOptions.bReadAccess          = TRUE;


           hMsgQueue = CreateMsgQueue(
                                  NULL,
                                  &msgQueueOptions);


          if (hMsgQueue == NULL)
          {
        wcscpy(szOut,TEXT("Could not create message queue for Ndis notifications"));
        SendMessage(hWnd,MYMSG_ADDLINE,-1,(LPARAM)szOut);
        break;
          }


        ndisRequestNotification.hMsgQueue       = hMsgQueue;
        ndisRequestNotification.dwNotificationTypes = NDISUIO_NOTIFICATION_MEDIA_CONNECT |
                                                                           NDISUIO_NOTIFICATION_MEDIA_DISCONNECT;

        if (!DeviceIoControl(g_hNdisUio,
                                     IOCTL_NDISUIO_REQUEST_NOTIFICATION,
                                     &ndisRequestNotification,
                                     sizeof(NDISUIO_REQUEST_NOTIFICATION),
                                     NULL,
                                     0,
                                     NULL,
                                     NULL))
        {
                wcscpy(szOut,TEXT("Error invoking Ndis Ioctl method"));
                SendMessage(hWnd,MYMSG_ADDLINE,-1,(LPARAM)szOut);
                break;
        }


        //
        //      NDISUIO takes it well, now party on it..
        //
        while(1)
        {
              while (WaitForSingleObject(hMsgQueue,INFINITE) == WAIT_OBJECT_0)
              {


                  while (ReadMsgQueue(
                                    hMsgQueue,
                                    &sDeviceNotification,
                                   sizeof(NDISUIO_DEVICE_NOTIFICATION),
                                   &dwBytesReturned,
                                   1,
                                   &dwFlags))
                   {
                memset(szOut,0,MAX_BUFFER_LENGTH);
                switch(sDeviceNotification.dwNotificationType)
                {
                    case NDISUIO_NOTIFICATION_MEDIA_CONNECT:
                         wcscpy(szOut,TEXT("Media connected"));
                         break;
                     case NDISUIO_NOTIFICATION_MEDIA_DISCONNECT:
                        wcscpy(szOut,TEXT("Msg Close ,Media disconnected"));
                        break;
                    }
                    SendMessage(hWnd,MYMSG_ADDLINE,-1,(LPARAM)szOut);  
                     break;
                } //while readMsg

              }//while waitForSingleObject

        }


   }while(FALSE);


   if(hMsgQueue)
           CloseHandle(hMsgQueue);
} // DoWaitNotifThread


Thanks so much!

                    Mag
[+][-]05/04/06 07:13 AM, ID: 16605759Accepted Solution

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About this solution

Zone: Programming for 802.11x Wireless Standard
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Solution Provided By: opanza
Participating Experts: 2
Solution Grade: C
 
[+][-]05/13/06 10:48 AM, ID: 16674574Author Comment

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[+][-]05/17/06 12:17 AM, ID: 16696921Author Comment

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[+][-]05/17/06 04:32 AM, ID: 16698045Expert Comment

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[+][-]05/17/06 08:20 AM, ID: 16699988Author Comment

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