deviceid.c

Windows CE 6.0 BSP for VOIPAC Board (PXA270) Version 2b.

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
//------------------------------------------------------------------------------
//
//  File:  deviceid.c
//
//  This file implements the IOCTL_HAL_GET_DEVICE_ID handler.
//
#include <windows.h>
#include <oal.h>


//------------------------------------------------------------------------------
//
//  Function:  OALIoCtlHalGetDeviceId
//
//  Implements the IOCTL_HAL_GET_DEVICE_ID handler. This function fills in a 
//  DEVICE_ID structure.
//
BOOL OALIoCtlHalGetDeviceId( 
    UINT32 code, VOID *pInpBuffer, UINT32 inpSize, VOID *pOutBuffer, 
    UINT32 outSize, UINT32 *pOutSize
) {
    BOOL rc = FALSE;
    DEVICE_ID *pId = (DEVICE_ID *)pOutBuffer;
    LPSTR pDeviceId = NULL;
    UINT32 size, length1, length2, offset;

    OALMSG(OAL_IOCTL&&OAL_FUNC, (L"+OALIoctlHalGetDeviceID(...)\r\n"));

    // Get device unique id from arguments
    pDeviceId = OALArgsQuery(OAL_ARGS_QUERY_DEVID);
    if (pDeviceId == NULL) pDeviceId = "";
    
    // Compute required size (first is unicode, second multibyte!)
    length1 = (NKwcslen(g_oalIoCtlPlatformType) + 1) * sizeof(WCHAR);
    length2 = strlen(pDeviceId) + 1;
    size = sizeof(DEVICE_ID) + length1 + length2;

    // update size if pOutSize is specified
    if (pOutSize) *pOutSize = size;

    // Validate inputs (do it after we can return required size)
    if (pOutBuffer == NULL || outSize < sizeof(DEVICE_ID)) {
        NKSetLastError(ERROR_INVALID_PARAMETER);
        OALMSG(OAL_WARN, (
            L"WARN: OALIoCtlHalGetDeviceID: Invalid parameter\r\n"
        ));
        goto cleanUp;
    }

    // Set size to DEVICE_ID structure
    pId->dwSize = size;

    // If the size is too small, indicate the correct size 
    if (outSize < size) {
        NKSetLastError(ERROR_INSUFFICIENT_BUFFER);
        goto cleanUp;
    }

    // Fill in the Device ID type
    offset = sizeof(DEVICE_ID);

    // Copy in PlatformType data
    pId->dwPresetIDOffset = offset;
    pId->dwPresetIDBytes = length1;
    memcpy((UINT8*)pId + offset, g_oalIoCtlPlatformType, length1);
    offset += length1;

    // Copy device id data
    pId->dwPlatformIDOffset = offset;
    pId->dwPlatformIDBytes  = length2;
    memcpy((UINT8*)pId + offset, pDeviceId, length2);

    // We are done
    rc = TRUE;
    
cleanUp:
    // Indicate status
    OALMSG(OAL_IOCTL&&OAL_FUNC, (L"-OALIoCtlHalGetDeviceID(rc = %d)\r\n", rc));
    return rc;
}

//------------------------------------------------------------------------------