Qt C++ TCP服务端响应多客户端通讯

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本示例使用的设备：WIFI无线4G网络RFID云读卡器远程网络开关物流网阅读器TTS语音-淘宝网 (taobao.com)

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QMessageBox"
#include <QDebug>
#include <exception>
#include <QTcpServer>
#include <QTcpSocket>
#include <QObject>
#include <QTime>
#include <QTreeWidgetItem>
#include <QClipboard>

bool listening=false;
QTcpServer m_server;
QTcpSocket m_socket;

//获取本机所有网卡IP------------------------------------------------------------------------------------------------------
QStringList getAllIPAddresses() {
    QStringList ips;
    QList<QHostAddress> list = QNetworkInterface::allAddresses();
    for (int i = 0; i < list.size(); ++i) {
        QHostAddress address = list.at(i);
        // 检查是否为IPv4地址，并排除回环地址
        if (address.protocol() == QAbstractSocket::IPv4Protocol && address != QHostAddress::LocalHost) {
            ips << address.toString();
        }
    }
    return ips;
}

//获取系统现时间-------------------------------------------------------------------------------------------------------------
QString getsystime(){
    QTime time = QTime::currentTime();
    QString timeStr = time.toString("hh:mm:ss.zzz");
    return timeStr;
}

//获取系统日期时间-------------------------------------------------------------------------------------------------------------
QString getsysdatetime(){
    QDateTime currentDateTime = QDateTime::currentDateTime();
    QString dateTimeString = currentDateTime.toString("yy-MM-dd hh:mm:ss");
    return dateTimeString;
}

//QByteArray转16进制QString------------------------------------------------------------------------------------------------
QString ByteArrayToHexString(QByteArray data){
    QString ret(data.toHex().toUpper());
    int len = ret.length()/2;
    for(int i=1;i<len;i++)
    {
        ret.insert(2*i+i-1," ");
    }
    return ret;
}

//通讯报文显示-----------------------------------------------------------------------------------------------------
void MainWindow::listadditems(int ctr,QString listinfo){
    switch (ctr){
    case 0:
        if(ui->listWidget_report->count()>30){
            ui->listWidget_report->clear();
        }
        ui->listWidget_report->addItem(listinfo);
        ui->listWidget_report->setCurrentRow(ui->listWidget_report->count()-1);
        break;
    case 1:
        ui->listWidget_online->addItem(listinfo);
        ui->listWidget_online->setCurrentRow(ui->listWidget_online->count()-1);
    }
}


MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->TEPort->setPlainText("39169");        //出厂默认39169端口
    ui->spinBox_dispdelay->setValue(20);
    ui->spinBox_swit->setValue(30);
    ui->spinBox_voice->setValue(8);
    ui->textEdit_disp->setText("欢迎您使用我们的网络读卡器！");
    ui->textEdit_tts->setText("感谢您的使用，您的支持是我们最大的动力！");

    QStringList ips = getAllIPAddresses();
    foreach (QString ip, ips) {
        ui->CBIP->addItem(ip);
    }
    if(ui->CBIP->count()<1){
        QMessageBox::information(NULL, "提示", "未搜索到本机的网卡，系统不能正常运行！");
        delete ui;
    }
}

MainWindow::~MainWindow()
{
    delete ui;
}

//启动、关闭TCP服务-------------------------------------------------------------------------------------------------------
void MainWindow::initserver(){
    try{
        if(ui->pushButton_initserver->text()=="开启TCP服务"){
            QString ipstr=ui->CBIP->currentText();
            QHostAddress localeip(ipstr);
            quint16 port=ui->TEPort->toPlainText().toUInt();

            m_server = new QTcpServer(this);
            m_server->listen(localeip, port);
            connect(m_server, &QTcpServer::newConnection, this, &MainWindow::onNewConnection);

            listening=true;
            ui->pushButton_initserver->setText("停止");
            listadditems(0,getsystime()+" Tcp Server is listening...");
        }else{
            listening=false;
            m_server->close();
            ui->pushButton_initserver->setText("开启TCP服务");
            for(int i=0;i<tcpclientlist.count();i++){
                tcpclientlist.at(i)->close();
                //tcpclientlist.remove(i);
                ui->listWidget_online->takeItem(i);
            }
            tcpclientlist.clear();
            listadditems(0,getsystime()+" Tcp Server is close! ");
        }
    }
    catch(_exception)
    {
        listening=false;
        ui->pushButton_initserver->setText("开启TCP服务");
    }
}

//侦听到有新的TCP客户端接入服务--------------------------------------------------------------------------------------------
void MainWindow::onNewConnection()
{
    m_socket = m_server->nextPendingConnection();
    tcpclientlist.append(m_socket);

    QString RemoIp=m_socket->peerAddress().toString();
    QString RemoPort=QString::number( m_socket->peerPort());
    listadditems(1,RemoIp+":"+RemoPort);
    listadditems(0,getsystime()+" NewConn "+RemoIp+":"+RemoPort);

    connect(m_socket, &QTcpSocket::readyRead, this, &MainWindow::onReadyRead);
    connect(m_socket, &QTcpSocket::disconnected, this, &MainWindow::onClientDisconnected);
    connect(m_socket, &QTcpSocket::connected, this, &MainWindow::onConnected);
//  connect(m_socket, &QTcpSocket::stateChanged, this, &MainWindow::onStateChanged);

}


//接收到TCP客户端传送来来的数据-------------------------------------------------------------------------------------------
void MainWindow::onReadyRead()
{
    QByteArray buffer;
    for(int row=0;row<tcpclientlist.count();row++){
        m_socket=tcpclientlist.at(row);
        buffer = m_socket->readAll();
        if(buffer.length()!=0){
            QString RemoIp=m_socket->peerAddress().toString();
            QString RemoPort=QString::number( m_socket->peerPort());
            listadditems(0,getsystime()+" Receive: "+RemoIp+":"+RemoPort+"    "+ByteArrayToHexString(buffer));

            unsigned char databuff[buffer.length()];
            std::copy(buffer.begin(), buffer.end(), databuff);

            switch (databuff[0]){
            case 0xc1:
            case 0xcf:
                 Analyze_c1_cf(row,databuff,buffer.length());          //解析读取IC卡卡号
                 break;

            case 0xd1:
            case 0xdf:
                 Analyze_d1_df(row,databuff,buffer.length());          //解析读取ID卡卡号
                 break;

            default:
                break;
            }
        }
    }
}


//侦测到TCP客户端断开连接---------------------------------------------------------------------------------------------
void MainWindow::onClientDisconnected()
{
    QString RemoIp=m_socket->peerAddress().toString();
    quint16 RemoPort= m_socket->peerPort();
    for(int i=0;i<tcpclientlist.count();i++){
        if(tcpclientlist.at(i)->peerAddress().toString()==RemoIp && tcpclientlist.at(i)->peerPort()==RemoPort){
            tcpclientlist.remove(i);
            ui->listWidget_online->takeItem(i);
            listadditems(0,getsystime()+" Disconn: "+RemoIp+":"+QString::number(RemoPort));
        }
    }
}


void MainWindow::onConnected()
{
    QString RemoIp=m_socket->peerAddress().toString();
    QString RemoPort=QString::number( m_socket->peerPort());
}

//void MainWindow::onStateChanged(QAbstractsocket::SocketState socketstate){
//    switch (socketstate){
//    case QAbstractSocket::UnconnectedState:ui->labConnectState->setText("Unconnectedstate");break;
//    case QAbstractSocket::HostLookupState:ui->labConnectState->setText("HostLookupstate");break;
//    case QAbstractSocket::ConnectedState:ui->labConnectState->setText("connectedstate");break;
//    case QAbstractSocket::ConnectingState:ui->labConnectState->setText("connectingstate");break;
//    case QAbstractSocket::BoundState: ui->labConnectState->setText("Boundstate");break;
//    case QAbstractSocket::ClosingState:ui->labConnectState->setText("closingstate");break;
//    case QAbstractSocket::ListeningState:ui->labConnectState->setText("listeningstate");break;
//    }
//}


//解析读取IC卡卡号-------------------------------------------------------------------------------------------------------------------
void MainWindow::Analyze_c1_cf(int socketid,unsigned char databuff[], qint64 buflen)
{
    QString IPAddress=QString::asprintf("%d", databuff[1])+"."+QString::asprintf("%d", databuff[2])+"."+QString::asprintf("%d", databuff[3])+"."+QString::asprintf("%d", databuff[4]); //设备IP地址,广域网上使用，一般不对此IP回应，而是对数据流的 ip及端口 回应
    QString DeviceNumber=QString::asprintf("%05d",databuff[5]+databuff[6]*256);   //设备自编机号
    QString FrameNumber=QString::asprintf("%05d",databuff[7]+databuff[8]*256);    //数据包号
    int cardnolen=databuff[9];

    QString CardnoHexZ="";          //16进制卡号正码
    QString CardnoHexF="";          //16进制卡号反码
    for (int i=0;i<cardnolen;i++){
        CardnoHexZ=CardnoHexZ+QString::asprintf("%02X", databuff[10+i]);
        if(i<4){CardnoHexF=CardnoHexF+QString::asprintf("%02X", databuff[9+cardnolen-i]);}   //只取4个字节计算8H10D反码
    }

    QString SerialNumber="";        //设备全球唯一硬件序号
    for (int i=10+cardnolen;i<buflen;i++){
        SerialNumber=SerialNumber+QString::asprintf("%02X", databuff[i]);
    }

    bool status;
    QString Cardno8H10D=QString::asprintf("%010u",CardnoHexF.toUInt(&status,16));  //转8H10D反码卡号

    QString  DispInf;
    if (databuff[0]==0xc1){DispInf="读取IC卡号,";}else{DispInf="IC卡离开读卡器,";}
    DispInf=DispInf+"设备IP:"+IPAddress+",机号:"+DeviceNumber+",数据包号:"+FrameNumber+",16进制卡号:"+CardnoHexZ+",转8H10D反码:"+Cardno8H10D+",设备全球唯一序号:"+SerialNumber;
    ui->plainTextEdit_msg->setPlainText(DispInf);

    if(ui->checkBox_Resp->isChecked()){Respondinfo(socketid,getsysdatetime()+"卡号:"+Cardno8H10D);}  //回应驱动设备显示+蜂鸣响声
}

//解析读取ID卡卡号-------------------------------------------------------------------------------------------------------------------
void MainWindow::Analyze_d1_df(int socketid,unsigned char databuff[], qint64 buflen)
{
    QString IPAddress=QString::asprintf("%d", databuff[1])+"."+QString::asprintf("%d", databuff[2])+"."+QString::asprintf("%d", databuff[3])+"."+QString::asprintf("%d", databuff[4]); //设备IP地址,广域网上使用，一般不对此IP回应，而是对数据流的 ip及端口 回应
    QString DeviceNumber=QString::asprintf("%05d",databuff[5]+databuff[6]*256);   //设备自编机号
    QString FrameNumber=QString::asprintf("%05d",databuff[7]+databuff[8]*256);    //数据包号

    QString CardnoHexZ="";          //16进制卡号正码
    QString CardnoHexF="";          //16进制卡号反码
    for (int i=0;i<5;i++){
        CardnoHexZ=CardnoHexZ+QString::asprintf("%02X", databuff[9+i]);
        if(i<4){CardnoHexF=CardnoHexF+QString::asprintf("%02X", databuff[9+3-i]);}   //只取4个字节计算8H10D反码
    }

    QString SerialNumber="";        //设备全球唯一硬件序号
    for (int i=9+5;i<buflen;i++){
        SerialNumber=SerialNumber+QString::asprintf("%02X", databuff[i]);
    }

    bool status;
    QString Cardno8H10D=QString::asprintf("%010u",CardnoHexF.toUInt(&status,16));  //转8H10D反码卡号

    QString  DispInf;
    if (databuff[0]==0xd1){DispInf="读取ID卡号,";}else{DispInf="ID卡离开读卡器,";}
    DispInf=DispInf+"设备IP:"+IPAddress+",机号:"+DeviceNumber+",数据包号:"+FrameNumber+",16进制卡号:"+CardnoHexZ+",转8H10D反码:"+Cardno8H10D+",设备全球唯一序号:"+SerialNumber;
                                                                                                                                                                          ui->plainTextEdit_msg->setPlainText(DispInf);

    if(ui->checkBox_Resp->isChecked()){Respondinfo(socketid,getsysdatetime()+"卡号:"+Cardno8H10D);}  //回应驱动设备显示+蜂鸣响声
}


void MainWindow::on_btnClose_clicked()
{
    m_server->close();
}


//向指定的客户端发送数据--------------------------------------------------------------------------------------------------------------
void MainWindow::SendBufToSockID(int socketid,QByteArray rbuffer){
    m_socket=tcpclientlist.at(socketid);
    m_socket->write(rbuffer);

    QString RemoIp=m_socket->peerAddress().toString();
    QString RemoPort=QString::number( m_socket->peerPort());
    QString SendHex=getsystime()+" Send To: "+(RemoIp+":"+RemoPort+"             ").mid(0,22);
    SendHex=SendHex+ByteArrayToHexString(rbuffer);
    listadditems(0,SendHex);
}


void MainWindow::on_pushButton_initserver_clicked()
{
    initserver();
}


//驱动读卡器蜂鸣响声-----------------------------------------------------------------------
void MainWindow::on_btnSendbeep_clicked()
{
    QListWidgetItem *item = ui->listWidget_online->currentItem();
    int row = ui->listWidget_online->row(item);
    if(row<0){
        QMessageBox::critical(this, "警告", "请选择一台在线设备再执行此功能！", QMessageBox::Ok);
    }else{
        QByteArray sendData;
        sendData.append(0x96);                             //功能码
        quint16 devno=0;
        sendData.append(devno % 256);                      //机号低位
        sendData.append(devno / 256);                      //机号高位，高低位都为0表示任意机号
        sendData.append(ui->CBbeep->currentIndex());       //蜂鸣响声代码
        SendBufToSockID(row,sendData);
    }
}

//驱动读卡器开启继电器-----------------------------------------------------------------------
void MainWindow::on_btnswitchon_clicked()
{
    QListWidgetItem *item = ui->listWidget_online->currentItem();
    int row = ui->listWidget_online->row(item);
    if(row<0){
        QMessageBox::critical(this, "警告", "请选择一台在线设备再执行此功能！", QMessageBox::Ok);
    }else{
        QByteArray sendData;
        sendData.append(0x78);                             //功能码
        quint16 devno=0;
        sendData.append(devno % 256);                      //机号低位
        sendData.append(devno / 256);                      //机号高位，高低位都为0表示任意机号
        QString swithno="F"+QString::asprintf("%d",ui->CBSwitch->currentIndex());
        bool status;
        sendData.append(swithno.toUInt(&status,16));       //选择继电器
        quint16 deltime=ui->spinBox_swit->value();
        sendData.append(deltime % 256);                    //开启延时低位
        sendData.append(deltime / 256);                    //开启延时高位
        SendBufToSockID(row,sendData);
    }
}

//驱动读卡器关闭已开启的继电器-----------------------------------------------------------------
void MainWindow::on_btnswitchoff_clicked()
{
    QListWidgetItem *item = ui->listWidget_online->currentItem();
    int row = ui->listWidget_online->row(item);
    if(row<0){
        QMessageBox::critical(this, "警告", "请选择一台在线设备再执行此功能！", QMessageBox::Ok);
    }else{
        QByteArray sendData;
        sendData.append(0x78);                             //功能码
        quint16 devno=0;
        sendData.append(devno % 256);                      //机号低位
        sendData.append(devno / 256);                      //机号高位，高低位都为0表示任意机号
        QString swithno="E"+QString::asprintf("%d",ui->CBSwitch->currentIndex());
        bool status;
        sendData.append(swithno.toUInt(&status,16));       //选择继电器
        quint16 deltime=ui->spinBox_swit->value();
        sendData.append(deltime % 256);                    //开启延时低位
        sendData.append(deltime / 256);                    //开启延时高位
        SendBufToSockID(row,sendData);
    }
}

//驱动读卡器蜂鸣响声并显示文字---------------------------------------------------------------------
void MainWindow::on_btnDispbeep_clicked()
{
    QListWidgetItem *item = ui->listWidget_online->currentItem();
    int row = ui->listWidget_online->row(item);
    if(row<0){
        QMessageBox::critical(this, "警告", "请选择一台在线设备再执行此功能！", QMessageBox::Ok);
    }else{
        QByteArray sendData;
        sendData.append(0x5A);                             //功能码
        quint16 devno=0;
        sendData.append(devno % 256);                      //机号低位
        sendData.append(devno / 256);                      //机号高位，高低位都为0表示任意机号
        sendData.append(ui->CBbeep->currentIndex());       //蜂鸣响声代码，255表示不响声
        sendData.append(ui->spinBox_dispdelay->value());   //文字显示时长，
        QString dispstr=ui->textEdit_disp->toPlainText()+"                                  ";  //加空格是为了确保满屏34位显示
        QByteArray Dispbyte=dispstr.toLocal8Bit();
        for(int i=0;i<34;i++){
            sendData.append(Dispbyte[i]);
        }
        SendBufToSockID(row,sendData);
    }
}

//驱动读卡器蜂鸣响声+显示文字+播报TTS语音+开启继电器开关
void MainWindow::on_btndispbeeptts_clicked()
{
    QListWidgetItem *item = ui->listWidget_online->currentItem();
    int row = ui->listWidget_online->row(item);
    if(row<0){
        QMessageBox::critical(this, "警告", "请选择一台在线设备再执行此功能！", QMessageBox::Ok);
    }else{
        if(ui->spinBox_voice->value()>16){ui->spinBox_voice->setValue(16);} //tts最大语音取值16
        QString strls="[v"+QString::asprintf("%d",ui->spinBox_voice->value())+"]";
        strls=strls+ui->textEdit_tts->toPlainText().trimmed();
        QByteArray SpeakArr=strls.toLocal8Bit();         //TS语音转换为Ansi码
        quint8 speakbytes=SpeakArr.size();
        quint8 dispbytes=34;                //双行显示屏显示长度34，四行屏显示长度72

        QByteArray sendData;
        sendData.append(0x5c);                             //功能码
        quint16 devno=0;
        sendData.append(devno % 256);                      //机号低位
        sendData.append(devno / 256);                      //机号高位，高低位都为0表示所有机
        sendData.append(ui->CBbeep->currentIndex());       //蜂鸣响声代码,取值255表示不响

        QString swithno="F"+QString::asprintf("%d",ui->CBSwitch->currentIndex());
        bool status;
        sendData.append(swithno.toUInt(&status,16));       //选择继电器
        quint16 deltime=ui->spinBox_swit->value();
        sendData.append(deltime % 256);                    //延时低位
        sendData.append(deltime / 256);                    //延时高位

        sendData.append(ui->spinBox_dispdelay->value());   //文字显示时长，
        quint8 begindisp =0;                               //在显示屏中的哪个位置开始显示，一般取0
        sendData.append(begindisp);
        sendData.append(dispbytes);                        //显示文字长度
        sendData.append(speakbytes);                       //tts语音长茺

        QString dispstr=ui->textEdit_disp->toPlainText()+"                                  ";  //加空格是为了确保满屏34位显示
        QByteArray Dispbyte=dispstr.toLocal8Bit();
        for(int i=0;i<dispbytes;i++){
            sendData.append(Dispbyte[i]);       //显示信息
        }
        for(int i=0;i<speakbytes;i++){
            sendData.append(SpeakArr[i]);       //TTS语音信息
        }

        sendData.append(0x55);      //防干扰后缀
        sendData.append(0xaa);
        sendData.append(0x66);
        sendData.append(0x99);
        SendBufToSockID(row,sendData);
    }
}

//接收到刷卡数据立即回应--------------------------------------------------------------------------
void MainWindow::Respondinfo(int socketid,QString Dispinf)
{
    QByteArray RespBuff;
    RespBuff.append(0x5A);                             //功能码
    quint16 devno=0;
    RespBuff.append(devno % 256);                      //机号低位
    RespBuff.append(devno / 256);                      //机号高位，高低位都为0表示任意机
    RespBuff.append(ui->CBbeep->currentIndex());       //蜂鸣响声代码，255表示不响声
    RespBuff.append(ui->spinBox_dispdelay->value());   //文字显示时长，
    QString dispstr=Dispinf+"                                  ";  //加空格是为了确保满屏34位显示
    QByteArray Dispbyte=dispstr.toLocal8Bit();
    for(int i=0;i<34;i++){
        RespBuff.append(Dispbyte[i]);
    }

    m_socket=tcpclientlist.at(socketid);
    m_socket->write(RespBuff);

    QString RemoIp=m_socket->peerAddress().toString();
    QString RemoPort=QString::number( m_socket->peerPort());
    QString SendHex=getsystime()+" Send To: "+(RemoIp+":"+RemoPort+"             ").mid(0,22);
    SendHex=SendHex+ByteArrayToHexString(RespBuff);
    listadditems(0,SendHex);
}


void MainWindow::on_btncopyreport_clicked()
{
    QString listinf;
    int row=ui->listWidget_report->count();
    if (row<1){
        return;
    }else{
        for (int i=0;i<row;i++){
            QListWidgetItem *item = ui->listWidget_report->item(i);
            listinf=listinf+item->text()+"\n";
        }
        QClipboard *clipboard = QApplication::clipboard();
        clipboard->setText(listinf);
        QMessageBox::information(this, "提示", "显示数据报文已拷贝到剪切板");
    }
}

源码下载 ：https://download.csdn.net/download/zhangjin7422/89421064

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