为什么 BluetoothSetLocalServiceInfo 抛出错误 1314？

Question

我一直在尝试构建一个 BT 应用程序。我想使用 BluetoothSetLocalServiceInfo 但我收到错误 1314（客户端不持有所需的权限）。我使用来自 windows 驱动程序的 echo 蓝牙示例。这是我修改后的代码：

DEFINE_GUID(BTHECHOSAMPLE_SVC_GUID, 0xc07508f2, 0xb970, 0x43ca, 0xb5, 0xdd, 0xcc, 0x4f, 0x23, 0x91, 0xbe, 0xf4);
wchar_t name[17] = L"BthEchoSampleSrv";
extern __declspec(selectany) const PWSTR BthEchoSampleSvcName = name;
/* fc71b33d-d528-4763-a86c-78777c7bcd7b */
DEFINE_GUID(BTHECHOSAMPLE_DEVICE_INTERFACE, 0xfc71b33d, 0xd528, 0x4763, 0xa8, 0x6c, 0x78, 0x77, 0x7c, 0x7b, 0xcd, 0x7b);

int main(){

  DWORD err = ERROR_SUCCESS;
  BLUETOOTH_LOCAL_SERVICE_INFO SvcInfo = { 0 };
  SvcInfo.Enabled = true;

  if (FAILED(StringCbCopyW(SvcInfo.szName, sizeof(SvcInfo.szName), BthEchoSampleSvcName)))
  {
    printf("Copying svc name failed\n");
    goto exit;
  }

  std::cout<<"Name of the device: "<< SvcInfo.szName<<std::endl;

  if (ERROR_SUCCESS != (err = BluetoothSetLocalServiceInfo(
    NULL, //callee would select the first found radio
    &BTHECHOSAMPLE_SVC_GUID,
    0,
    &SvcInfo
  )))
  {
    printf("BluetoothSetLocalServiceInfo failed, err = %d\n", err);
    goto exit;
  }
exit:
  return err;
}

我运行命令行中的代码（以管理员身份打开），我将应用程序的属性更改为运行具有管理员权限。我错过了什么？

Answer 1

错误 1314 是 ERROR_PRIVILEGE_NOT_HELD。根据 BluetoothSetLocalServiceInfo() 文档：

The BluetoothSetLocalServiceInfo function returns the following values:

...

STATUS_PRIVILEGE_NOT_HELD
The caller does not have the required privileges. See the Remarks section for information about how to elevate privileges.

备注说：

Warning
The process that calls BluetoothSetLocalServiceInfo must have the SE_LOAD_DRIVER_NAME privilege. A process running in the system or an administrator context can elevate its privilege by using the SDK LookupPrivilegeValue and AdjustTokenPrivileges functions. For more information about this see Installing a Bluetooth Device.

所以，这意味着：

您的应用运行的用户帐户根本没有该权限
您的应用未通过 AdjustTokenPrivileges() 启用权限。

Installing a Bluetooth Device 文档提供了启用 SE_LOAD_DRIVER_NAME 权限的示例：

The installation application must call the user-mode API BluetoothSetLocalServiceInfo. However, before the application can call this API, the application must have the SE_LOAD_DRIVER_NAME security privilege. The following code example demonstrates how to obtain this privilege. Note, the example does not demonstrate error handling.
HANDLE procToken;
LUID luid;
TOKEN_PRIVILEGES tp;

OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &procToken);

LookupPrivilegeValue(NULL, SE_LOAD_DRIVER_NAME, &luid);

Tp.PrivilegeCount = 1;
Tp.privileges[0].Luid = luid;
Tp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

AdjustTokenPrivileges(procToken, FALSE, &tp, sizeof(TOKEN_PRIVILEGES), (PTOKEN_PRIVILEGES) NULL, (PDWORD)NULL)

有关详细信息，请参阅 MSDN 上的 Changing Privileges in a Token and Enabling and Disabling Privileges in C++。

为什么 BluetoothSetLocalServiceInfo 抛出错误 1314？

why does BluetoothSetLocalServiceInfo throw error 1314?

c++

windows

bluetooth