windows-server-2003/net/ndis/samples/wmi/wmitest.c

//
// WMITEST.C
//
// Test program for NDIS WMI interface
//
// usage: WMITEST
//
//

#include <windows.h>
#include <winioctl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <ctype.h>
#include <malloc.h>

#include <winerror.h>
#include <winsock.h>

#include <ntddndis.h>
#include <ndisguid.h>
#include <wmium.h>

#ifndef NDIS_STATUS
#define NDIS_STATUS     ULONG
#endif

#if DBG
#define DEBUGP(stmt)    printf stmt
#else
#define DEBUGP(stmt)
#endif

#define PRINTF(stmt)    printf stmt

#define MAX_NDIS_DEVICE_NAME_LEN        256
#define MAX_ADAPTER_NAME_LENGTH         512

#define DEVICE_PREFIX L"\\Device\\"

LPGUID WmiEvent[] = {
    (LPGUID) &GUID_NDIS_STATUS_MEDIA_CONNECT,
    (LPGUID) &GUID_NDIS_STATUS_MEDIA_DISCONNECT,
    (LPGUID) &GUID_NDIS_NOTIFY_ADAPTER_ARRIVAL,
    (LPGUID) &GUID_NDIS_NOTIFY_ADAPTER_REMOVAL,
    (LPGUID) &GUID_NDIS_NOTIFY_DEVICE_POWER_ON,
    (LPGUID) &GUID_NDIS_NOTIFY_DEVICE_POWER_OFF
};


PWCHAR
GetAdapterName(
    PWNODE_SINGLE_INSTANCE  Instance,
    PWCHAR                  AdapterName,
    BOOLEAN                 HaveLength
    );


DWORD
__inline
EnableWmiEvent(
    IN LPGUID EventGuid,
    IN BOOLEAN Enable
    );

VOID
__inline
DeregisterWmiEventNotification(
    VOID
    );

DWORD
__inline
RegisterWmiEventNotification(
    VOID
    );

VOID
WINAPI
WmiEventNotification(
    IN PWNODE_HEADER Event,
    IN UINT_PTR Context
    );


VOID __cdecl
main(
    INT         argc,
    CHAR        *argv[]
    )
{
    DWORD       ErrorCode;
    
    printf("testing NDIS wmi notifications. press 'q' to abort.\n");
    
    //
    // test wmi
    //
    if ((ErrorCode = RegisterWmiEventNotification()) != NO_ERROR)
    {
        printf("error %d calling RegisterWmiEventNotification.\n", ErrorCode);
        return;
    }
    while (_fgetchar() != 'q')
    {
        Sleep(1000);
    }
    DeregisterWmiEventNotification();

    return;
}


DWORD
__inline
EnableWmiEvent(
    IN LPGUID EventGuid,
    IN BOOLEAN Enable
    )
{
    return WmiNotificationRegistrationW(
        EventGuid,                      // Event Type.
        Enable,                         // Enable or Disable.
        WmiEventNotification,           // Callback.
        0,                              // Context.
        NOTIFICATION_CALLBACK_DIRECT);  // Notification Flags.
}


VOID
__inline
DeregisterWmiEventNotification(
    VOID
    )
{
    int i;
    
    for (i = 0; i < (sizeof(WmiEvent) / sizeof(LPGUID)); i++) {
        (VOID) EnableWmiEvent(WmiEvent[i], FALSE);
    }
}


DWORD
__inline
RegisterWmiEventNotification(
    VOID
    )
{
    DWORD Error;
    int i;
    
    for (i = 0; i < (sizeof(WmiEvent) / sizeof(LPGUID)); i++) {
        Error = EnableWmiEvent(WmiEvent[i], TRUE);
        if (Error != NO_ERROR)
        {
            printf("failed enabling event for %lx\n", i);
        }
    }
    
    if (Error != NO_ERROR)
    {
        DeregisterWmiEventNotification();
    }
    
    return Error;

}


VOID
WINAPI
WmiEventNotification(
    IN PWNODE_HEADER Event,
    IN UINT_PTR Context
    )
/*++

Routine Description:

    Process a WMI event (specifically adapter arrival or removal).
    
Arguments:

    Event - Supplies event specific information.

    Context - Supplies the context registered.
    
Return Value:

    None.
    
--*/ 
{
    PWNODE_SINGLE_INSTANCE Instance = (PWNODE_SINGLE_INSTANCE) Event;
    USHORT AdapterNameLength;
    WCHAR AdapterName[MAX_ADAPTER_NAME_LENGTH];
    PWCHAR AdapterGuid = NULL;
    USHORT AdapterInstanceNameLength;
    WCHAR AdapterInstanceName[MAX_ADAPTER_NAME_LENGTH];

    if (Instance == NULL)
    {
        return;
    }

    AdapterInstanceNameLength =
        *((PUSHORT) (((PUCHAR) Instance) + Instance->OffsetInstanceName));

    if ((AdapterInstanceNameLength / sizeof(WCHAR)) > (MAX_ADAPTER_NAME_LENGTH - 1))
    {
        return;
    }

    RtlCopyMemory(
        AdapterInstanceName,
        ((PUCHAR) Instance) + Instance->OffsetInstanceName + sizeof(USHORT),
        AdapterInstanceNameLength);
    
    AdapterInstanceName[AdapterInstanceNameLength / sizeof(WCHAR)] = L'\0';

    do 
    {
        if (memcmp(
            &(Event->Guid),
            &GUID_NDIS_STATUS_MEDIA_CONNECT,
            sizeof(GUID)) == 0) 
        {
            //
            // Media connect
            //
            printf("Media connect. %ws\n", AdapterInstanceName);
            break;            
        }
        if (memcmp(
            &(Event->Guid),
            &GUID_NDIS_STATUS_MEDIA_DISCONNECT,
            sizeof(GUID)) == 0) 
        {
            //
            // Media disconnect
            //
            printf("Media disconnect. %ws\n", AdapterInstanceName);
            break;            
        }
        if (memcmp(
            &(Event->Guid),
            &GUID_NDIS_NOTIFY_ADAPTER_ARRIVAL,
            sizeof(GUID)) == 0)
        {
            //
            // Adapter arrival.
            //
            AdapterGuid = GetAdapterName(Instance, AdapterName, TRUE);
            if (AdapterGuid)
                printf("Adapter arrival. %ws\n", AdapterGuid);
            break;            
        }

        if (memcmp(
            &(Event->Guid),
            &GUID_NDIS_NOTIFY_ADAPTER_REMOVAL,
            sizeof(GUID)) == 0)
        {
            //
            // Adapter removal.
            //
            AdapterGuid = GetAdapterName(Instance, AdapterName, TRUE);
            if (AdapterGuid)
                printf("Adapter removal. %ws\n", AdapterGuid);
            break;
        }

        if (memcmp(
            &(Event->Guid),
            (PVOID)&GUID_NDIS_NOTIFY_DEVICE_POWER_ON,
            sizeof(GUID)) == 0)
        {
            //
            // Adapter powered on
            //
            printf("Adapter powered on. %ws\n", AdapterInstanceName );
            break;
        }

        if (memcmp(
            &(Event->Guid),
            (PVOID)&GUID_NDIS_NOTIFY_DEVICE_POWER_OFF,
            sizeof(GUID)) == 0)
        {
            //
            // Adapter powered off
            //
            printf("Adapter powered off. %ws\n", AdapterInstanceName );
            
            break;
        }
    } while (FALSE);

}

PWCHAR
GetAdapterName(
    PWNODE_SINGLE_INSTANCE  Instance,
    PWCHAR                  AdapterName,
    BOOLEAN                 HaveLength
    )
{
    USHORT AdapterNameLength;
    PWCHAR AdapterGuid = NULL;
    PWCHAR Src;
    USHORT   i;

    do
    {
        if (HaveLength)
        {
            //
            //  WNODE_SINGLE_INSTANCE is organized thus...
            // +-----------------------------------------------------------+
            // |<--- DataBlockOffset --->| AdapterNameLength | AdapterName |
            // +-----------------------------------------------------------+
            //
            // AdapterName is defined as "\DEVICE\"AdapterGuid
            //
            AdapterNameLength =
                *((PUSHORT) (((PUCHAR) Instance) + Instance->DataBlockOffset));
            
            if (((AdapterNameLength / sizeof(WCHAR)) > (MAX_ADAPTER_NAME_LENGTH  - 1)) ||
                ((AdapterNameLength / sizeof(WCHAR)) < wcslen(DEVICE_PREFIX)))
            {
                break;
            }
            
            RtlCopyMemory(
                AdapterName,
                ((PUCHAR) Instance) + Instance->DataBlockOffset + sizeof(USHORT),
                AdapterNameLength);
            AdapterName[AdapterNameLength / sizeof(WCHAR)] = L'\0';
            AdapterGuid = AdapterName + wcslen(DEVICE_PREFIX);        
        }
        else
        {
            //
            //  WNODE_SINGLE_INSTANCE is NULL terminated
            // +-----------------------------------------------------------+
            // |<--- DataBlockOffset --->| AdapterName | L'\0'
            // +-----------------------------------------------------------+
            //
            // AdapterName is defined as "\DEVICE\"AdapterGuid
            //
            Src = (PWCHAR)((PUCHAR) Instance + Instance->DataBlockOffset);
        
            for (i = 0; i < MAX_ADAPTER_NAME_LENGTH - 1; i++)
            {
                if (Src[i] == L'\0')
                    break;
                AdapterName[i]= Src[i];                
            }
            
            AdapterName[i] = L'\0';
            AdapterNameLength = i * sizeof(WCHAR);

            if (AdapterNameLength > wcslen(DEVICE_PREFIX))
            {
                AdapterGuid = AdapterName + wcslen(DEVICE_PREFIX);        
            }
        }
        
    } while (FALSE);
    

    return AdapterGuid;
}