winsock：蓝牙客户端-服务器未连接

Posted 2023-02-22

【中文标题】winsock：蓝牙客户端-服务器未连接

【英文标题】：winsock : bluetooth client-server not connecting

【发布时间】：2015-09-11 03:28:43

【问题描述】：

我已经使用winsock编写了一个小型蓝牙服务器和客户端程序

我无法弄清楚为什么客户端没有连接到服务器。两者都在不同的电脑上运行，并且 两者都是通过蓝牙配对的。

服务器代码是

void server()

    SOCKET server_socket = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM), new_socket;
    if (server_socket == INVALID_SOCKET)
    
        cout << "socket creation failed...Error code : " << WSAGetLastError() << endl;
        Sleep(2000);
        return;
    
    cout << "socket created" << endl;
    SOCKADDR_BTH sa, sa2;
    int channel = 0, len=sizeof(sa2);
    memset(&sa, 0, sizeof(SOCKADDR_BTH));
    sa.addressFamily = AF_BTH;
    sa.port = channel & 0xff;

    //bind
    if (bind(server_socket, (SOCKADDR *)&sa, sizeof(sa)))
    
        cout << "Binding failed...Error code : " << WSAGetLastError() << endl;
        closesocket(server_socket);
        Sleep(2000);
        return;
    
    cout << "binding done" << endl;
    cout << "\nWaiting for client" << endl;
    listen(server_socket, 3);
    new_socket = accept(server_socket, (sockaddr *)&sa2, &len);
    cout<<"connection accepted";

客户端代码是

void client()

    SOCKET client_socket = socket(AF_BTH, SOCK_STREAM, BTHPROTO_RFCOMM);
    int channel = 0;
    BTH_ADDR bt_addr;
    char* server_address = "34:02:86:26:c1:62";
    if (client_socket == INVALID_SOCKET)
    
        cout << "socket creation failed...Error code : " << WSAGetLastError() << endl;
        Sleep(2000);
        return;
    
    cout << "socket created" << endl;
    if (str2ba(server_address, &bt_addr) == 1)
    
        cout << "address conversion error..." << endl;
        Sleep(2000);
        return;
    
    SOCKADDR_BTH sa;
    sa.addressFamily = AF_BTH;
    sa.port = channel & 0xff;
    sa.btAddr = bt_addr;
    cout << "\nconnecting..." << endl;
    if (connect(client_socket, (sockaddr *)&sa, sizeof(sockaddr)))
    
        cout << "Error in connecting...Error code : " << WSAGetLastError() << endl;
        closesocket(client_socket);
        Sleep(2000);
        return;
    
    cout << "\nConnected" << endl;
    Sleep(2000);


int str2ba(char *str_bt_addr, BTH_ADDR *bt_addr)//for converting string to bluetooth address

    unsigned int addr[6];
    if (sscanf_s(str_bt_addr, "%02x:%02x:%02x:%02x:%02x:%02x", 
    &addr[0], &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6)
    
        return 1;
    
    *bt_addr = 0;
    BTH_ADDR tmpaddr;
    int i;
    for (i = 0;i < 6;++i)
    
        tmpaddr = (BTH_ADDR)(addr[i] & 0xff);
        *bt_addr = ((*bt_addr) << 8) + tmpaddr;
    
    return 0;

为什么这些没有连接？我错过了什么？ 请帮我。 提前感谢您的帮助。

【参考方案1】：

在我短暂的蓝牙体验中，问题通常出在 SOCKADDR_BTH 声明中。

我硬编码了每个端点的 MAC 地址：“38:2D:E8:B9:FA:EB” 十六进制

RemoteEndPoint.btAddr = BTH_ADDR(0x382DE8B9FAEB);

还要确保你的端口在每个端点上都是相同的，我使用了：

RemoteEndPoint.port = 0;

和

LocalEndpoint.port = 0;

我在这里有一些代码：C++ WinSock Bluetooth Connection - AT Command - Error Received 我也有问题。

蓝牙并不像某些人想象的那么容易，因此 OP 没有收到任何答案