linux - combine netcat with chat on bash for automatic udp responses

Question

I want to combine "chat" and "nc" on linux, so I will create a tiny udp server that responds on a specific request and sends back an answer.

In fact I want to redirect the stdout of "nc" to the stdin of "chat" and vice versa. My first attempt was:

nc -w 3000 -u -n -l -p 30000 >&1111 <2222 & 
chat -V 'request' 'answer' >&2222 <1111

But it didn't work.

Answer 1

使用socat而不是 netcat。像这样的东西：

socat UDP-LISTEN:5555 EXEC:"chat -sv ping pong",pty

要对其进行测试，您可以打开另一个终端，并使用 socat 桥接 stdio 和 UDP 套接字：

socat - UDP:localhost:5555

输入 ping，你会得到 pong ！