我需要能够使用适用于 Windows(尤其是 win7 或更高版本)的 C++ 代码来配对设备。我已经编写了应该工作的代码，但它没有。我可以配对很多设备，Roku、耳机、扬声器等，但由于某种原因，我需要配对的设备无法工作。

它总是返回错误代码 0x05，根据 bthdefs.h 定义为 BTH_ERROR_AUTHENTICATION_FAILURE。

所以奇怪的部分在这里。它从不尝试进行身份验证。在配对期间应调用以提供 key 的回调函数未被调用。我已经验证它确实可以通过耳机等其他设备调用。

我曾尝试使用不带回调函数的 BluetoothAuthenticateDeviceEx()，回调函数应该在 Windows 中弹出 GUI 以完成配对。它会针对我的耳机和其他设备弹出，不会针对我的设备弹出。

作为旁注，我可以使用 Window 的蓝牙向导来配对设备。它只是拒绝以编程方式工作。

我无法弄清楚我正在使用的 winapi 代码与 Windows 的向导在配对过程中所做的事情之间有什么区别。

这是我能得到的最简单的测试应用程序。我真正的应用程序是使用 Qt 和 mingw 构建的。此应用程序使用 MSVC 2012 和纯 Windows 代码来消除问题中的任何混淆。我的所有代码都存在与该错误代码 5 相同的问题。

#include <windows.h>
#include "bthdef.h"
#include "BluetoothAPIs.h"
#include <tchar.h>
#include <string>
#include <iostream>
#include <vector>

#pragma comment(lib, "bthprops.lib")

using namespace std;

vector<BLUETOOTH_DEVICE_INFO> scanDevices()
{
    vector<BLUETOOTH_DEVICE_INFO> res;

    BLUETOOTH_DEVICE_SEARCH_PARAMS bdsp;
    BLUETOOTH_DEVICE_INFO bdi;
    HBLUETOOTH_DEVICE_FIND hbf;

    ZeroMemory(&bdsp, sizeof(BLUETOOTH_DEVICE_SEARCH_PARAMS));

    // set options for how we want to load our list of BT devices
    bdsp.dwSize = sizeof(BLUETOOTH_DEVICE_SEARCH_PARAMS);
    bdsp.fReturnAuthenticated = TRUE;
    bdsp.fReturnRemembered = TRUE;
    bdsp.fReturnUnknown = TRUE;
    bdsp.fReturnConnected = TRUE;
    bdsp.fIssueInquiry = TRUE;
    bdsp.cTimeoutMultiplier = 4;
    bdsp.hRadio = NULL;

    bdi.dwSize = sizeof(bdi);

    // enumerate our bluetooth devices
    hbf = BluetoothFindFirstDevice(&bdsp, &bdi);
    if (hbf)
    {
        do
        {
            res.push_back(bdi);
        } while (BluetoothFindNextDevice(hbf, &bdi));

        // close our device enumerator
        BluetoothFindDeviceClose(hbf);
    }

    return res;
}

BOOL CALLBACK bluetoothAuthCallback(LPVOID param, PBLUETOOTH_AUTHENTICATION_CALLBACK_PARAMS params)
{
    cout << "callback happened" << endl;
    return TRUE;
}

void pairDevice(BLUETOOTH_DEVICE_INFO device)
{
    wstring ws = device.szName;
    cout << "Pairing device " << string(ws.begin(), ws.end()) << endl;

    // register callback
    cout << "Registering callback" << endl;
    HBLUETOOTH_AUTHENTICATION_REGISTRATION hCallbackHandle = 0;
    DWORD result = BluetoothRegisterForAuthenticationEx(&device, &hCallbackHandle, (PFN_AUTHENTICATION_CALLBACK_EX)&bluetoothAuthCallback, NULL);
    if (result != ERROR_SUCCESS)
    {
        cout << "Failed to register callback" << endl;
        return;
    }

    // authenticate
    result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionNotRequired);
    //DWORD result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionRequired);
    //DWORD result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionNotRequiredBonding);
    //DWORD result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionRequiredBonding);
    //DWORD result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionNotRequiredGeneralBonding);
    //DWORD result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionRequiredGeneralBonding);
    //DWORD result = BluetoothAuthenticateDeviceEx(NULL, NULL, &device, NULL, MITMProtectionNotDefined);
    switch (result)
    {
    case ERROR_SUCCESS:
        cout << "pair device success" << endl;
        break;

    case ERROR_CANCELLED:
        cout << "pair device failed, user cancelled" << endl;
        break;

    case ERROR_INVALID_PARAMETER:
        cout << "pair device failed, invalid parameter" << endl;
        break;

    case ERROR_NO_MORE_ITEMS:
        cout << "pair device failed, device appears paired already" << endl;
        break;

    default:
        cout << "pair device failed, unknown error, code " << (unsigned int)result << endl;
        break;
    }
}

int _tmain(int argc, _TCHAR *argv[])
{
    cout << "Scanning bluetooth devices..." << endl;
    cout.flush();

    // scan devices
    vector<BLUETOOTH_DEVICE_INFO> devices = scanDevices();

    cout << "Got " << devices.size() << " devices" << endl;

    // list all devices
    int pdIndex = -1;
    int foundDev = -1;
    vector<BLUETOOTH_DEVICE_INFO>::const_iterator devci;
    for (devci=devices.begin();devci!=devices.end();devci++)
    {
        pdIndex++;
        wstring ws = (*devci).szName;
        cout << "Device: " << string(ws.begin(), ws.end()) << endl;

        // see if we find our device (case sensitive)
        if (ws.find(L"smp") != string::npos)
            foundDev = pdIndex;
    }

    // pick our ismp device
    if (foundDev == -1)
    {
        cout << "Could not find a device to pair" << endl;
        return 1;
    }

    BLUETOOTH_DEVICE_INFO pd = devices[foundDev];
    wstring ws = pd.szName;
    cout << "Found device to pair, " << string(ws.begin(), ws.end()) << endl;

    // attempt to pair device
    pairDevice(pd);

    return 0;
}

最佳答案

据我所知，我可以在您的代码中看到很多问题:

1) 您在对“pairDevice”的调用中调用了 BluetoothRegisterForAuthenticationEx:hCallbackHandle 变量仅在调用期间有效 所以你必须在 'pairDevice'

2) 你之后没有调用 BluetoothUnregister

3) 你没有删除 hCallbackHandle 句柄

4) 你的“bluetoothAuthCallback”是空的:你必须做类似的事情

BLUETOOTH_AUTHENTICATE_RESPONSE response;
::ZeroMemory(&response,sizeof(BLUETOOTH_AUTHENTICATE_RESPONSE));
response.authMethod = cbparams->authenticationMethod;
response.bthAddressRemote = cbparams->deviceInfo.Address;
response.negativeResponse = FALSE;
DWORD error=::BluetoothSendAuthenticationResponseEx(nullptr, &response);

(见上面的评论；-)

5) 您对“BluetoothAuthenticateDeviceEx”的调用将异步触发回调例程...，因此您必须“等待”它...在离开 main() 函数之前...

关于c++ - 使用 C++ 在 Windows 中配对蓝牙设备，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25739939/