Question

我想检查每个设备（如wifi或蓝牙）的状态，知道它们工作正常与否，或者当我重新启动压力测试时它们丢失了，我怎样才能获得设备状态（如设备中的设备属性）管理）？Windows是否有API来实现？

Answer 1

获取设备状态，您需要拨打CM_Get_DevNode_Status

获取 DEVINST dnDevInst ，您可以使用CM_Get_Device_ID_ListW + CM_Locate_DevNode或替代使用CM_Locate_DevNode + CM_Get_Child + {枚举所有设备{3}}

例如：

void enumDN(DEVINST dnDevInst)
{
    union {
        PVOID buf;
        PBYTE pb;
        PWSTR sz;
    };

    ULONG cb = 0, rcb = 256;

    static volatile UCHAR guz;

    PVOID stack = alloca(guz);

    WCHAR Name[MAX_DEVICE_ID_LEN];

    CONFIGRET err;

    if (CM_Get_Device_ID(dnDevInst, Name, RTL_NUMBER_OF(Name), 0) == CR_SUCCESS)
    {
        DEVPROPTYPE PropertyType;
        ULONG Status, ulProblemNumber;

        if (CM_Get_DevInst_Status(&Status, &ulProblemNumber, dnDevInst, 0) == CR_SUCCESS)
        {
            PWSTR FriendlyName = NULL;
            do 
            {
                if (cb < rcb)
                {
                    rcb = cb = RtlPointerToOffset(buf = alloca(rcb - cb), stack);
                }

                if ((err = CM_Get_DevNode_PropertyW(dnDevInst, &DEVPKEY_Device_FriendlyName, 
                    &PropertyType, pb, &rcb, 0)) == CR_SUCCESS)
                {
                    if (PropertyType == DEVPROP_TYPE_STRING)
                    {
                        FriendlyName = sz;
                    }
                }

            } while (err == CR_BUFFER_SMALL);

            DbgPrint("%08x %S %S\n", Status, Name, FriendlyName);
        }
    }

    if ((err = CM_Get_Child(&dnDevInst, dnDevInst, 0)) == CR_SUCCESS)
    {
        do 
        {
            enumDN(dnDevInst);

        } while ((err = CM_Get_Sibling(&dnDevInst, dnDevInst, 0)) == CR_SUCCESS);
    }
}

void enumDN()
{
    DEVINST dnDevInst;
    if (CM_Locate_DevInstW(&dnDevInst, NULL, 0) == CR_SUCCESS)
    {
        enumDN(dnDevInst);
    }
}

如何在PC重启时检查Windows设备状态？

1 个答案: