Qt中UDP获取信息源IP
时间: 2024-03-26 08:38:33 浏览: 258
在Qt中使用UDP协议接收数据时,可以通过`QHostAddress`类获取信息源IP地址。具体步骤如下:
1. 创建`QUdpSocket`对象并绑定端口:
```cpp
QUdpSocket *socket = new QUdpSocket(this);
socket->bind(QHostAddress::AnyIPv4, 1234); // 绑定到本地IP地址的1234端口
```
2. 接收数据:
```cpp
QByteArray buffer;
QHostAddress sender; // 保存信息源IP地址
quint16 senderPort; // 保存信息源端口号
buffer.resize(socket->pendingDatagramSize());
socket->readDatagram(buffer.data(), buffer.size(), &sender, &senderPort);
```
3. 使用`sender`对象获取信息源IP地址:
```cpp
QString ipAddress = sender.toString(); // 获取信息源IP地址
```
注意:如果使用IPv6地址,则应使用`AnyIPv6`代替`AnyIPv4`。
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