netcat命令

广播UDP消息给局域网内的所有主机
server：nc -luk 9999
client:  echo  "test data" | nc -u -b 255.255.255.255 9999

socat - UDP-DATAGRAM:255.255.255.255:24000,broadcast

https://www.xp.cn/jishu-php-3044.html

https://www.cnblogs.com/oloroso/p/4610563.html