qt wifi mesh 中节点自组网代码
时间: 2024-06-09 14:04:55 浏览: 110
在Qt中实现WiFi Mesh自组网需要使用Qt的网络模块,具体实现步骤如下:
1. 创建一个Qt应用程序,并在.pro文件中添加网络模块:
```
QT += network
```
2. 创建一个类来表示Mesh节点,该类应该包含节点的ID、IP地址、端口号等信息,并提供连接和断开连接的方法。
3. 在主界面中,创建一个用于显示节点列表的列表视图,并添加一个按钮来启动Mesh网络。
4. 在按钮的点击事件中,创建一个UDP套接字并绑定到本地IP地址和端口号,然后发送广播消息以寻找其他节点。同时,启动一个定时器来定期发送心跳包以维持节点之间的连接。
5. 当收到其他节点的广播消息时,将其添加到节点列表中。
6. 当节点从列表中断开连接时,应该从列表中删除该节点。
7. 当用户在节点列表中选择一个节点并点击“连接”按钮时,应该创建一个TCP连接并连接到该节点。连接成功后,可以在该连接上发送和接收数据。
8. 当节点收到数据时,应该将其显示在主界面上。
参考代码如下:
```
class MeshNode : public QObject
{
Q_OBJECT
public:
MeshNode(int id, const QString& ip, int port, QObject* parent = nullptr)
: QObject(parent)
, m_id(id)
, m_ip(ip)
, m_port(port)
, m_socket(nullptr)
{
}
void connect()
{
m_socket = new QTcpSocket(this);
m_socket->connectToHost(m_ip, m_port);
connect(m_socket, &QTcpSocket::readyRead, this, &MeshNode::onReadyRead);
connect(m_socket, &QTcpSocket::disconnected, this, &MeshNode::onDisconnected);
}
void disconnect()
{
if (m_socket) {
m_socket->disconnectFromHost();
m_socket->deleteLater();
m_socket = nullptr;
}
}
signals:
void dataReceived(const QByteArray& data);
private slots:
void onReadyRead()
{
QByteArray data = m_socket->readAll();
emit dataReceived(data);
}
void onDisconnected()
{
emit disconnected(this);
}
private:
int m_id;
QString m_ip;
int m_port;
QTcpSocket* m_socket;
};
class MeshNetwork : public QObject
{
Q_OBJECT
public:
MeshNetwork(QObject* parent = nullptr)
: QObject(parent)
, m_udpSocket(nullptr)
, m_timer(nullptr)
{
}
void start()
{
m_udpSocket = new QUdpSocket(this);
m_udpSocket->bind(QHostAddress::Any, 12345);
connect(m_udpSocket, &QUdpSocket::readyRead, this, &MeshNetwork::onReadyRead);
m_timer = new QTimer(this);
m_timer->setInterval(5000);
connect(m_timer, &QTimer::timeout, this, &MeshNetwork::onTimerTimeout);
m_timer->start();
}
void stop()
{
m_timer->stop();
m_udpSocket->deleteLater();
}
void send(const QByteArray& data, const MeshNode* node)
{
if (node && node->socket()) {
node->socket()->write(data);
}
}
signals:
void nodeDiscovered(MeshNode* node);
void nodeDisconnected(MeshNode* node);
private slots:
void onReadyRead()
{
while (m_udpSocket->hasPendingDatagrams()) {
QByteArray datagram;
datagram.resize(m_udpSocket->pendingDatagramSize());
QHostAddress sender;
quint16 senderPort;
m_udpSocket->readDatagram(datagram.data(), datagram.size(), &sender, &senderPort);
MeshNode* node = findNode(sender.toString(), senderPort);
if (!node) {
node = new MeshNode(m_nodes.size() + 1, sender.toString(), senderPort, this);
m_nodes.append(node);
emit nodeDiscovered(node);
}
}
}
void onTimerTimeout()
{
QByteArray datagram = "Hello, world!";
m_udpSocket->writeDatagram(datagram, QHostAddress::Broadcast, 12345);
}
private:
MeshNode* findNode(const QString& ip, int port)
{
for (MeshNode* node : m_nodes) {
if (node->ip() == ip && node->port() == port) {
return node;
}
}
return nullptr;
}
QList<MeshNode*> m_nodes;
QUdpSocket* m_udpSocket;
QTimer* m_timer;
};
```
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