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I am fairly new to Linux and GNU Radio.

I am trying to use GNU Radio to process information. To pass information into GNU Radio, I was planning on using the Socket PDU blocks to pass in information through a socket. To test out the connection I placed 2 Socket PDU blocks in GNU Radio Companion and connected them together, then I used netcat to send and receive messages and files.

I was able to get the connection to work when I had both Socket PDU blocks to TCP server. The sending block was set to port 52001 and the receiving block to 52002. In one terminal I typed:

nc localhost 52002

In a second terminal I typed:

nc localhost 52001

After that, any messages I typed in the second terminal appeared in the first.

I tried to do the same thing with setting the Socket PDU blocks to UDP Server and using the commands:

nc -u localhost 52002
nc -u localhost 52001

But nothing I typed in the second terminal would appear in the first.

What am I missing here? Does netcat just not work with this kind of stuff, or am I forgetting a step? With being new to Linux, GNU Radio and network protocols, I don't even know where to start.

Rensi Sam
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Lyndsey Dickson
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1 Answers1

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You'll have to go to the receiving terminal and press enter. This will send an empty UDP packet to the server and tell it about the existence of this terminal/socket.

Just

nc -u localhost 52001

doesn't do anything as UDP has no connection setup.

bastibl
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