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I have a remote raspberrypi that uses autossh to connect to my local machine (with reverse tunnel -R). This should feed a dump1090 instance on my local machine. I'm using

/bin/nc localhost 40005 | /bin/nc localhost 30104

and it works great until the connection is good but when the link breaks the new connection isn't established. How can I make the netcat link persistent? Thanks!

2 Answers 2

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Kind of a hacky option, but you could just wrap your nc command(s) in a while loop:

#!/bin/bash
while true; do
    # your netcat command(s) here
done;

This'll keep re-launching the netcat stuff until you kill the script.

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  • 1
    You might want a sleep 1 in the loop too, to stop the loop running away on failure. Dec 9, 2018 at 9:52
  • The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
    – Pavel T
    Dec 9, 2018 at 12:26
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It was solved with socat utility. Thanks to all!

/usr/bin/socat -u TCP:localhost:40005 TCP:localhost:30104

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