c++ - 蓝牙设备本地名称

Question

我遇到了暂时无法解决的问题。对于我的一个 C++ 项目，我必须编写函数来更改蓝牙 radio 本地名称。它使用 Microsoft 蓝牙堆栈。如果您打开任何蓝牙加密狗设备属性并导航到高级属性，您可以找到此名称。我需要这个没有任何第三方库，只有 WinApi 函数。需要按照 Windows 设备管理器的方式进行。问题是我没有弄清楚它是如何做到的。 BluetoothAPI 和 Setupapi 在这里似乎没有用。带有 SPDRP_FRIENDLYNAME 参数的 SetupDiSetDeviceRegistryProperty 不是我所需要的。更改注册表中的本地名称也无济于事。也许在那之后我应该以某种方式重新启动蓝牙堆栈。我不知道。那么，如何以编程方式更改设备高级属性？提前致谢。

Answer 1

我自己找到了解决方案:

#include <windows.h>
#include <Setupapi.h>
#include <stdio.h>
#include <tchar.h>
#include <cfgmgr32.h>
#include <devguid.h>
#include <string>
#pragma comment(lib,"setupapi.lib")
using namespace std;

#define WIN32_LEAN_AND_MEAN

typedef basic_string<TCHAR> tstring;
DEFINE_GUID(GUID_DEVCLASS_BLUETOOTH, {0xe0cbf06cL, 0xcd8b, 0x4647, {0xbb, 0x8a, 0x26, 0x3b, 0x43, 0xf0, 0xf9, 0x74}});


LPTSTR GetGenericBluetoothAdapterInstanceID(void)
{
        unsigned i;    
        CONFIGRET r;
        HDEVINFO hDevInfo;
        SP_DEVINFO_DATA DeviceInfoData;
        PTSTR deviceInstanceID = new TCHAR[MAX_DEVICE_ID_LEN];

        // Find all bluetooth radio modules
        hDevInfo = SetupDiGetClassDevs(&GUID_DEVCLASS_BLUETOOTH, NULL, NULL, DIGCF_PRESENT);

        if (hDevInfo == INVALID_HANDLE_VALUE)
                return NULL;   

        // Get first Generic Bluetooth Adapter InstanceID
        for (i = 0; ; i++)  
        {              
                DeviceInfoData.cbSize = sizeof (DeviceInfoData);

                if (!SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData))
                        break;

                r = CM_Get_Device_ID(DeviceInfoData.DevInst, deviceInstanceID , MAX_PATH, 0);

                if (r != CR_SUCCESS)
                        continue;

                if (_tcsncmp(_TEXT("USB"), deviceInstanceID, 3) == 0)
                {                      
                        return deviceInstanceID;
                }
        }

        return NULL;
}

void find_and_replace(LPTSTR source, LPCTSTR strFind, LPCTSTR strReplace)
{
        tstring s = tstring(source);
        tstring f = tstring(strFind);
        tstring r = tstring(strReplace);       
        size_t j;

        for ( ; (j = s.find( f )) != string::npos ; )
        {
                s.replace( j, f.length(), r );
        }

        _tcscpy(source, s.c_str());
}

int _tmain(int argc, TCHAR *argv[])
{
        if ( argc != 2 )
        {
                _tprintf( TEXT("Invalid parameters number. "
                        TEXT("Usage: Bthrmmodifier.exe <radio module local name>\n")));
                return 1;
        }

        LPTSTR instanceID = GetGenericBluetoothAdapterInstanceID();

        if (instanceID == NULL)
        {
                _tprintf(_TEXT("Failed to get Generic Bluetooth Adapter InstanceID\n"));
                return 1;
        }

        LPTSTR instanceIDModified = new TCHAR[_tcslen(instanceID)];
        _tcscpy(instanceIDModified, instanceID);
        find_and_replace(instanceIDModified, _TEXT("\\"), _TEXT("#"));

        HANDLE hDevice;
        TCHAR fileName[1024] = { 0 };  
        _tcscpy(fileName, _TEXT("\\\\.\\"));   
        _tcscat(fileName, instanceIDModified);
        _tcscat(fileName, _TEXT("#{a5dcbf10-6530-11d2-901f-00c04fb951ed}"));

        hDevice = CreateFile(fileName, GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);

        if (hDevice == INVALID_HANDLE_VALUE)
        {
                _tprintf(_TEXT("Failed to open device. Error code: %d\n"), GetLastError());            
                return EXIT_FAILURE;
        }

        //Change radio module local name in registry
        LPTSTR RMLocalName = argv[1];
        CHAR bufRMLocalName[256];

        int nLength = WideCharToMultiByte(CP_UTF8, 0, RMLocalName,
                -1, NULL, 0, NULL, NULL);
        WideCharToMultiByte(CP_UTF8, 0, RMLocalName,
                -1, bufRMLocalName, nLength, NULL, NULL);

        HKEY hKey;
        TCHAR rmLocalNameKey[1024] = { 0 };
        LSTATUS ret;
        _tcscpy(rmLocalNameKey, _TEXT("SYSTEM\\ControlSet001\\Enum\\"));       
        _tcscat(rmLocalNameKey, instanceID);
        _tcscat(rmLocalNameKey, _TEXT("\\Device Parameters"));

        ret = RegOpenKeyEx(HKEY_LOCAL_MACHINE, rmLocalNameKey,
                0L, KEY_SET_VALUE , &hKey);

        if(ret != ERROR_SUCCESS)
        {
                _tprintf(TEXT("Failed to open registry key. Error code: %d\n"), ret);
                return EXIT_FAILURE;
        }

        ret = RegSetValueEx(hKey, _TEXT("Local Name"), 0, REG_BINARY,
                (LPBYTE)bufRMLocalName, nLength);

        if (ret != ERROR_SUCCESS)
        {
                _tprintf(TEXT("Failed to set registry key. Error code: %d\n"), ret);
                return EXIT_FAILURE;
        }

        RegCloseKey(hKey);

        // This check decides what IO control code to use based on if we're in XP or Vista (and later).
        OSVERSIONINFO osver;
        osver.dwOSVersionInfoSize = sizeof(osver);
        GetVersionEx(&osver);

        UINT ctlCode = (UINT)(6 > osver.dwMajorVersion ? 0x220fd4 : 0x411008);
        long reload = 4;  // tells the control function to reset or reload or similar...
        DWORD bytes = 0; // merely a placeholder

        // Send radio module driver command to update device information
        if (!DeviceIoControl(hDevice, ctlCode, &reload, 4, NULL, 0, &bytes, NULL))
        {
                _tprintf(TEXT("Failed to update radio module local name. Error code: %d\n"), GetLastError());
                return EXIT_FAILURE;
        }

        _tprintf(TEXT("Done\n"));

        return EXIT_SUCCESS;
}