feat: UDP 的的单播和广播功能已经完全实现了

QtUdpEx/ExTrans/ExTrans.cpp

@@ -22,35 +22,165 @@
 #include "ExTrans.h"
 #include "ui_ExTrans.h"
 
+#include <QHostInfo>
+
 ExTrans::ExTrans(QWidget *parent) :
     QMainWindow(parent),
     ui(new Ui::ExTrans)
 {
     ui->setupUi(this);
     setWindowTitle("Tcp通信：unicast(单播) + broadcast(广播)的使用");
+
+    QString hostName = QHostInfo::localHostName();
+    QString ip = getLocalIp();
+    ui->plainTextEdit->appendPlainText("主机名称：" + hostName + "\n主机IP：" + ip + "\n");
+
+    m_labSocketState = new QLabel("Socket状态：");
+    m_labSocketState->setMinimumWidth(200);
+    ui->statusBar->addWidget(m_labSocketState);
+
+    ui->comboBoxIp->addItem(getLocalIp());
+    m_udpSocket = new QUdpSocket(this);
+
+    connect(m_udpSocket, SIGNAL(stateChanged(QAbstractSocket::SocketState)), this, SLOT(onSocketStateChange(QAbstractSocket::SocketState)));
+    onSocketStateChange(m_udpSocket->state());
+    connect(m_udpSocket, SIGNAL(readyRead()), this, SLOT(onSocketReadyRead()));
 }
 
 ExTrans::~ExTrans()
 {
     delete ui;
 }
-
+//绑定端口
 void ExTrans::on_actBind_triggered()
 {
+    quint16 port = ui->spinBoxBind->value();   //本机UDP端口
+    if (m_udpSocket->bind(port)) {   //端口绑定成功
+        ui->plainTextEdit->appendPlainText("端口绑定成功：" + QString::number(m_udpSocket->localPort()));
 
+        ui->actBind->setEnabled(false);
+        ui->actDisbind->setEnabled(true);
+    } else {
+        ui->plainTextEdit->appendPlainText("端口绑定失败");
+    }
 }
 
+//解除绑定
 void ExTrans::on_actDisbind_triggered()
 {
+    m_udpSocket->abort();  //断开，中止套接字
+    ui->plainTextEdit->appendPlainText("端口解除绑定成功");
 
+    ui->actBind->setEnabled(true);
+    ui->actDisbind->setEnabled(false);
 }
 
+//清除文本信息
 void ExTrans::on_actClean_triggered()
 {
-
+    ui->plainTextEdit->clear();
 }
 
+//关闭程序
 void ExTrans::on_actQuit_triggered()
 {
     close();
 }
+
+//单播消息
+void ExTrans::on_btnUnicast_clicked()
+{
+    QString targetIp = ui->comboBoxIp->currentText();
+    QHostAddress targetAddr(targetIp);    //目标 Ip
+    quint16 targetPort = ui->spinBoxPort->value();   //目标 port
+    QString msg = ui->lineEdit->text();   //发送的消息
+
+    QByteArray str = msg.toUtf8();
+    m_udpSocket->writeDatagram(str, targetAddr, targetPort);  //发送数据报
+
+    ui->plainTextEdit->appendPlainText(QString("[Send: ] %1").arg(msg));
+    ui->lineEdit->clear();
+    ui->lineEdit->setFocus();
+}
+
+//广播消息
+void ExTrans::on_btnBroadcast_clicked()
+{
+    quint16 targetPort = ui->spinBoxPort->value();   //目标 port
+    QString msg = ui->lineEdit->text();   //发送的消息
+
+    QByteArray str = msg.toUtf8();
+    m_udpSocket->writeDatagram(str, QHostAddress::Broadcast, targetPort);  //发送 数据报 给所有IP
+
+    ui->plainTextEdit->appendPlainText(QString("[广播: ] %1").arg(msg));
+    ui->lineEdit->clear();
+    ui->lineEdit->setFocus();
+}
+
+//socket 状态发生变化
+void ExTrans::onSocketStateChange(QAbstractSocket::SocketState socketState)
+{
+    switch (socketState) {
+    case QAbstractSocket::UnconnectedState:
+        m_labSocketState->setText("socket状态：UnconnectedState");
+        break;
+    case QAbstractSocket::HostLookupState:
+        m_labSocketState->setText("socket状态：HostLookupState");
+        break;
+    case QAbstractSocket::ConnectingState:
+        m_labSocketState->setText("socket状态：ConnectingState");
+        break;
+    case QAbstractSocket::ConnectedState:
+        m_labSocketState->setText("socket状态：ConnectedState");
+        break;
+    case QAbstractSocket::BoundState:
+        m_labSocketState->setText("socket状态：BoundState");
+        break;
+    case QAbstractSocket::ClosingState:
+        m_labSocketState->setText("socket状态：ClosingState");
+        break;
+    case QAbstractSocket::ListeningState:
+        m_labSocketState->setText("socket状态：ListeningState");
+        break;
+    default:
+        m_labSocketState->setText("socket状态：其他未知状态...");
+        break;
+    }
+}
+
+//读取 socket 传入的数据
+void ExTrans::onSocketReadyRead()
+{
+    while (m_udpSocket->hasPendingDatagrams()) {
+        QByteArray datagram;
+        datagram.resize(m_udpSocket->pendingDatagramSize());
+
+        QHostAddress peerAddr;
+        quint16 peerPort;
+
+        m_udpSocket->readDatagram(datagram.data(), datagram.size(), &peerAddr, &peerPort);  //读取数据包，消息+来自的Ip和port
+        QString str = datagram.data();
+        QString peer = QString("[From: %1  %2] %3").arg(peerAddr.toString()).arg(QString::number(peerPort)).arg(str);
+        ui->plainTextEdit->appendPlainText(peer);
+    }
+}
+
+//获取本机IP
+QString ExTrans::getLocalIp()
+{
+    QString hostName = QHostInfo::localHostName();
+    QHostInfo hostInfo = QHostInfo::fromName(hostName);
+    QString Ip = "";
+
+    if (hostInfo.addresses().isEmpty())
+        return 0;
+
+    foreach (QHostAddress addr, hostInfo.addresses()) {
+        if (addr.protocol() == QAbstractSocket::IPv4Protocol) {
+            Ip = addr.toString();
+            break;
+        }
+    }
+
+   return Ip;
+}

QtUdpEx/ExTrans/ExTrans.h

@@ -23,11 +23,20 @@
 #define EXTRANS_H
 
 #include <QMainWindow>
+#include <QLabel>
+#include <QUdpSocket>
+#include <QString>
 
 namespace Ui {
 class ExTrans;
 }
 
+/*!
+ * \class ExTrans 一个UDP的Deam测试，同时测试单播和广播
+ * \brief 因为是在同一台电脑测试，所以IP相同，需要绑定两个不同端口的，这样不会冲突；
+ * 若是两台电脑进行测试，那么可以约定使用相同的端口号，使用不同的IP；来进行通讯
+ */
+
 class ExTrans : public QMainWindow
 {
     Q_OBJECT
@@ -37,13 +46,24 @@ public:
     ~ExTrans();
 
 private slots:
-    void on_actBind_triggered();
+    void on_actBind_triggered();     //绑定端口
-    void on_actDisbind_triggered();
+    void on_actDisbind_triggered();  //解除绑定
-    void on_actClean_triggered();
+    void on_actClean_triggered();    //清除文本信息
-    void on_actQuit_triggered();
+    void on_actQuit_triggered();     //关闭程序
+    void on_btnUnicast_clicked();    //单播消息
+    void on_btnBroadcast_clicked();  //广播消息
+
+    void onSocketStateChange(QAbstractSocket::SocketState socketState);  //socket 状态发生变化
+    void onSocketReadyRead();        //读取 socket 传入的数据
+
+private:
+    QString getLocalIp();            //获取本机IP
 
 private:
     Ui::ExTrans *ui;
+
+    QLabel* m_labSocketState;
+    QUdpSocket* m_udpSocket;
 };
 
 #endif // EXTRANS_H

QtUdpEx/ExTrans/ExTrans.pro

@@ -4,7 +4,7 @@
 #
 #-------------------------------------------------
 
-QT       += core gui
+QT       += core gui network
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 

QtUdpEx/ExTrans/ExTrans.ui

@@ -27,7 +27,7 @@
          </widget>
         </item>
         <item>
-         <widget class="QSpinBox" name="spinBox">
+         <widget class="QSpinBox" name="spinBoxBind">
           <property name="maximum">
            <number>65000</number>
           </property>
@@ -48,7 +48,14 @@
          </widget>
         </item>
         <item>
-         <widget class="QComboBox" name="comboBox"/>
+         <widget class="QComboBox" name="comboBoxIp">
+          <property name="editable">
+           <bool>true</bool>
+          </property>
+          <property name="currentText">
+           <string>129.0.0.1</string>
+          </property>
+         </widget>
         </item>
        </layout>
       </item>
@@ -62,7 +69,7 @@
          </widget>
         </item>
         <item>
-         <widget class="QSpinBox" name="spinBox_2">
+         <widget class="QSpinBox" name="spinBoxPort">
           <property name="maximum">
            <number>65000</number>
           </property>
@@ -81,14 +88,14 @@
        <widget class="QLineEdit" name="lineEdit"/>
       </item>
       <item>
-       <widget class="QPushButton" name="pushButton">
+       <widget class="QPushButton" name="btnUnicast">
         <property name="text">
          <string>单播发送</string>
         </property>
        </widget>
       </item>
       <item>
-       <widget class="QPushButton" name="pushButton_2">
+       <widget class="QPushButton" name="btnBroadcast">
         <property name="text">
          <string>广播发送</string>
         </property>