qt实现的支持tcpudp支持单播组播以及订阅发布的软总线资源-CSDN下载

共3个文件

cpp：2个

h：1个

13 浏览量 2025-06-23 17:52:24 上传评论收藏 5KB ZIP 举报

在当前的技术领域，跨平台的软件开发框架Qt由于其强大的功能和简便的使用性被广泛应用于各种软件项目中。而网络通信作为软件开发中的一个重要组成部分，其重要性不言而喻。本文将从网络通信协议、Qt框架在网络编程中的应用，以及软总线的概念和实现三个方面详细探讨。网络通信协议是实现网络设备之间数据交换的基础。TCP/IP协议是目前广泛使用的通信协议族，其中TCP协议保证了数据传输的可靠性和顺序性，而UDP协议则以传输效率高著称，但不保证数据的完整性和顺序。在网络编程中，单播指的是单个节点向单个节点发送数据，组播则是单个节点向多个节点发送数据，而广播是单个节点向网络上的所有节点发送数据。它们各有优势，在不同的应用场景中发挥作用。接着，Qt框架中的网络编程功能十分强大。Qt提供了一整套的网络编程类，如QTcpServer、QTcpSocket、QUdpSocket等，这些类为开发者提供了方便的接口来实现TCP和UDP协议的网络通信。Qt的信号和槽机制非常适合用于实现事件驱动的编程模型，使得开发者能够简洁、高效地处理网络事件。通过Qt的网络模块，开发者可以轻松地构建出支持TCP和UDP协议的网络应用程序。进一步地，软总线技术是近年来较为热门的技术之一。软总线技术的核心在于模拟硬件总线，实现软件层面上不同模块之间的数据传输和消息传递。它通过提供统一的通信接口和协议，使得不同的软件组件能够在统一的框架下进行高效协同工作。在Qt框架中实现一个支持TCP/UDP协议的软总线，可以使得开发者在同一个项目中同时使用TCP和UDP进行数据通信，并能够灵活地进行单播、组播和订阅发布等多种通信方式。在本项目中，软总线的设计目标是实现一个跨平台的网络通信框架，它支持TCP/UDP协议，并具备单播、组播以及订阅发布的能力。通过合理设计软总线的架构，可以使得网络通信更加灵活和可靠，同时也便于系统的扩展和维护。Qt框架提供了良好的跨平台支持和丰富的网络编程类库，是构建这样一个软总线的理想选择。在实际的编码实现中，例如“qt_softbus.cpp”、“main.cpp”和“qt_softbus.h”这些文件共同构成了软总线的整体。其中，“qt_softbus.cpp”和“main.cpp”文件可能包含了程序的主体逻辑和事件循环处理，而“qt_softbus.h”文件则可能包含了软总线的接口定义和相关类的声明。开发者需要基于Qt的网络模块，编写相应的类和方法来处理TCP/UDP的连接、数据的发送与接收、以及实现单播、组播、订阅发布等机制。利用Qt框架实现一个支持TCP和UDP协议的软总线，不仅可以提升软件的网络通信能力，还可以通过软总线的设计理念，简化软件各组件之间的通信复杂度，提升开发效率和系统的整体性能。

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qt48-multiprotocol-softbus.zip （3个子文件）

qt_softbus.cpp 16KB

qt_softbus.h 6KB

main.cpp 1KB

#include "qt_softbus.h" #include <QDebug> // UdpUnicastConnector实现 UdpUnicastConnector::UdpUnicastConnector(QObject* parent) : IConnector(parent), socket(nullptr), currentState(ConnectionState::Disconnected) {} UdpUnicastConnector::~UdpUnicastConnector() { stop(); } bool UdpUnicastConnector::initialize(const QString& host, quint16 port) { targetHost = host; targetPort = port; return true; } bool UdpUnicastConnector::start() { if (socket) { delete socket; } socket = new QUdpSocket(this); connect(socket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams())); connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(socketError(QAbstractSocket::SocketError))); if (!socket->bind(QHostAddress::Any, 0)) { emit errorOccurred("Failed to bind UDP socket"); currentState = ConnectionState::Error; emit stateChanged(currentState); return false; } currentState = ConnectionState::Connected; emit stateChanged(currentState); return true; } void UdpUnicastConnector::stop() { if (socket) { socket->close(); delete socket; socket = nullptr; } currentState = ConnectionState::Disconnected; emit stateChanged(currentState); } bool UdpUnicastConnector::send(const Message& msg) { if (!socket || currentState != ConnectionState::Connected) { return false; } QByteArray datagram; datagram.append(msg.topic).append('\n').append(msg.data); qint64 bytesWritten = socket->writeDatagram(datagram, QHostAddress(targetHost), targetPort); return bytesWritten == datagram.size(); } void UdpUnicastConnector::readPendingDatagrams() { while (socket->hasPendingDatagrams()) { QByteArray datagram; datagram.resize(socket->pendingDatagramSize()); QHostAddress sender; quint16 senderPort; socket->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort); // 解析消息 int separatorIndex = datagram.indexOf('\n'); if (separatorIndex > 0) { Message msg; msg.topic = QString::fromUtf8(datagram.left(separatorIndex)); msg.data = datagram.mid(separatorIndex + 1); msg.sender = sender; msg.senderPort = senderPort; if (messageHandler) { messageHandler(msg); } } } } void UdpUnicastConnector::socketError(QAbstractSocket::SocketError error) { Q_UNUSED(error); emit errorOccurred(socket->errorString()); currentState = ConnectionState::Error; emit stateChanged(currentState); } // UdpMulticastConnector实现 UdpMulticastConnector::UdpMulticastConnector(QObject* parent) : IConnector(parent), socket(nullptr), currentState(ConnectionState::Disconnected) {} UdpMulticastConnector::~UdpMulticastConnector() { stop(); } bool UdpMulticastConnector::initialize(const QString& groupAddress, quint16 port) { multicastGroup = QHostAddress(groupAddress); this->port = port; return true; } bool UdpMulticastConnector::start() { if (socket) { delete socket; } socket = new QUdpSocket(this); connect(socket, SIGNAL(readyRead()), this, SLOT(readPendingDatagrams())); connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(socketError(QAbstractSocket::SocketError))); if (!socket->bind(QHostAddress::AnyIPv4, port, QUdpSocket::ShareAddress)) { emit errorOccurred("Failed to bind UDP multicast socket"); currentState = ConnectionState::Error; emit stateChanged(currentState); return false; } if (!socket->joinMulticastGroup(multicastGroup)) { emit errorOccurred("Failed to join multicast group"); currentState = ConnectionState::Error; emit stateChanged(currentState); return false; } currentState = ConnectionState::Connected; emit stateChanged(currentState); return true; } void UdpMulticastConnector::stop() { if (socket) { socket->leaveMulticastGroup(multicastGroup); socket->close(); delete socket; socket = nullptr; } currentState = ConnectionState::Disconnected; emit stateChanged(currentState); } bool UdpMulticastConnector::send(const Message& msg) { if (!socket || currentState != ConnectionState::Connected) { return false; } QByteArray datagram; datagram.append(msg.topic).append('\n').append(msg.data); // 设置TTL（Time-to-Live） socket->setSocketOption(QAbstractSocket::MulticastTtlOption, 1); qint64 bytesWritten = socket->writeDatagram(datagram, multicastGroup, port); return bytesWritten == datagram.size(); } void UdpMulticastConnector::readPendingDatagrams() { while (socket->hasPendingDatagrams()) { QByteArray datagram; datagram.resize(socket->pendingDatagramSize()); QHostAddress sender; quint16 senderPort; socket->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort); // 解析消息 int separatorIndex = datagram.indexOf('\n'); if (separatorIndex > 0) { Message msg; msg.topic = QString::fromUtf8(datagram.left(separatorIndex)); msg.data = datagram.mid(separatorIndex + 1); msg.sender = sender; msg.senderPort = senderPort; if (messageHandler) { messageHandler(msg); } } } } void UdpMulticastConnector::socketError(QAbstractSocket::SocketError error) { Q_UNUSED(error); emit errorOccurred(socket->errorString()); currentState = ConnectionState::Error; emit stateChanged(currentState); } // TcpClientConnector实现 TcpClientConnector::TcpClientConnector(QObject* parent) : IConnector(parent), socket(nullptr), currentState(ConnectionState::Disconnected) {} TcpClientConnector::~TcpClientConnector() { stop(); } bool TcpClientConnector::initialize(const QString& host, quint16 port) { targetHost = host; targetPort = port; return true; } bool TcpClientConnector::start() { if (socket) { delete socket; } socket = new QTcpSocket(this); connect(socket, SIGNAL(connected()), this, SLOT(connected())); connect(socket, SIGNAL(disconnected()), this, SLOT(disconnected())); connect(socket, SIGNAL(readyRead()), this, SLOT(readyRead())); connect(socket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(socketError(QAbstractSocket::SocketError))); currentState = ConnectionState::Connecting; emit stateChanged(currentState); socket->connectToHost(targetHost, targetPort); return true; } void TcpClientConnector::stop() { if (socket) { socket->disconnectFromHost(); if (socket->state() != QAbstractSocket::UnconnectedState) { socket->waitForDisconnected(); } delete socket; socket = nullptr; } currentState = ConnectionState::Disconnected; emit stateChanged(currentState); } bool TcpClientConnector::send(const Message& msg) { if (!socket || currentState != ConnectionState::Connected) { return false; } QByteArray datagram; datagram.append(msg.topic).append('\n').append(msg.data); // 添加消息长度前缀 QByteArray lengthPrefix; lengthPrefix.setNum(datagram.size()); lengthPrefix.append('\n'); qint64 bytesWritten = socket->write(lengthPrefix + datagram); return bytesWritten == (lengthPrefix.size() + datagram.size()); } void TcpClientConnector::connected() { currentState = ConnectionState::Connected; emit stateChanged(currentState); } void TcpClientConnector::disconnected() { currentState = ConnectionState::Disconnected; emit stateChanged(currentState);

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