将Windows中的蓝牙设备与c ++配对

Question

我需要能够使用C++ for Windows中的代码配对设备(特别是win7或更新版本).我编写了应该可以工作的代码,但事实并非如此.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正常工作.

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

所以这里奇怪的部分.它永远不会尝试进行身份验证.在调用期间应调用以提供密钥的回调函数不会被调用.我已经确认它会被其他设备(如耳机)调用.

我已经尝试使用BluetoothAuthenticateDeviceEx()而没有回调函数,它应该在Windows中弹出GUI来完成配对.它弹出我的耳机和其他设备,它不会弹出我的设备.

作为旁注,我可以使用Window的蓝牙向导配对设备就好了.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代码和windows'向导在配对期间正在做什么之间的区别.

这是我能得到的最简单的测试应用程序.我真正的应用程序使用Qt和mingw来构建.此应用程序使用MSVC 2012和纯Windows代码来从问题中删除任何混淆.我的所有代码都有与错误代码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;
}

Answer 1

据我所知,我可以在你的代码中看到很多问题:

1)你在调用'pairDevice'时调用了BluetoothRegisterForAuthenticationEx:hCallbackHandle变量只会在调用期间存在, 所以你必须在 'pairDevice' 之前注册

2)之后您没有调用BluetoothUnregister

3)您没有删除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);

(见上述评论;-)

5)你对'BluetoothAuthenticateDeviceEx'的调用会异步触发回调例程......所以你必须'等待'它才能离开main()函数...

Answer 2

也许您应该将响应添加到身份验证回调中。像这样：

BLUETOOTH_DEVICE_INFO aw = params->deviceInfo;
HANDLE lRadio = NULL;

BLUETOOTH_AUTHENTICATE_RESPONSE bar2Send;
::ZeroMemory(&bar2Send, sizeof(BLUETOOTH_AUTHENTICATE_RESPONSE));
bar2Send.bthAddressRemote = params->deviceInfo.Address;
bar2Send.authMethod = params->authenticationMethod;

DWORD result = BluetoothSendAuthenticationResponseEx(lRadio, &bar2Send);