socket.setBroadcast(flag)

• flag <boolean>

设置或清除 SO_BROADCAST 套接字选项。当设置为 true 时，UDP 数据包可能会被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将抛出 EBADF。

¥This method throws EBADF if called on an unbound socket.