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。
如果在未绑定的套接字上调用此方法将抛出 EBADF
。
flag
<boolean>
Sets or clears the SO_BROADCAST
socket option. When set to true
, UDP
packets may be sent to a local interface's broadcast address.
This method throws EBADF
if called on an unbound socket.