POCO库中文编程参考指南（7）Poco::Net::DatagramSocket

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本文深入解析了DatagramSocket类的构造函数、重载运算符、常用操作等核心功能，并提供了详细的代码示例。从创建Socket、连接与绑定、收发数据、广播等方面全面介绍了其用法。

作者：柳大·Poechant
博客：Blog.youkuaiyun.com/Poechant
邮箱：zhongchao.ustc#gmail.com (# -> @)
日期：April 15^th, 2012

1 构造函数

创建一个未连接的 IPv4 数据报 Socket：

DatagramSocket();

创建一个指定 IP 类型（IPv4 或 IPv6）的数据报 Socket：

explicit DatagramSocket(IPAddress::Family family);

创建一个指定 SocketAddress 的数据报 Socket

DatagramSocket(const SocketAddress& address, bool reuseAddress = false);

DatagramSocket(const Socket& socket);
    /// Creates the DatagramSocket with the SocketImpl
    /// from another socket. The SocketImpl must be
    /// a DatagramSocketImpl, otherwise an InvalidArgumentException
    /// will be thrown.

2 重载运算符

DatagramSocket& operator = (const Socket& socket);
    /// Assignment operator.
    ///
    /// Releases the socket's SocketImpl and
    /// attaches the SocketImpl from the other socket and
    /// increments the reference count of the SocketImpl.

3 常用操作

3.1 连接与绑定

void connect(const SocketAddress& address);
void bind(const SocketAddress& address, bool reuseAddress = false);

3.2 收发数据且不考虑 client

int sendBytes(const void* buffer, int length, int flags = 0);
int receiveBytes(void* buffer, int length, int flags = 0);

3.3 手法数据且获取 client 的 SocketAddress

int sendTo(const void* buffer, int length, const SocketAddress& address, int flags = 0);
int receiveFrom(void* buffer, int length, SocketAddress& address, int flags = 0);

3.4 收发广播

void setBroadcast(bool flag);
bool getBroadcast() const;

4 protected 函数

DatagramSocket(SocketImpl* pImpl);

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