socket.setBroadcast(flag)

• flag <boolean>

设置或清除 SO_BROADCAST 套接字选项。设置为 true 时，UDP 数据包可以发送到本地接口的广播地址。

【Sets or clears the SO_BROADCAST socket option. When set to true, UDP packets may be sent to a local interface's broadcast address.】

如果在未绑定的套接字上调用此方法，会抛出 EBADF 异常。

【This method throws EBADF if called on an unbound socket.】