Linux command sync over LAN with UDP

Broadcast a linux CLI command over LAN and execute immediately on clients for low-latency IoT command sync.

Architecture:

• Server : Responsible for broadcasting the bash command via UDP multicast
• IoT/Linux Clients : Listen for UDP messages, parse out the bash command, execute it immediately.
• Websocket Client : Sends the server a bash command

Usage

Server:

cd PATH/server/
npm install
npm start

Linux Clients

(eg. Raspberry Pi, Linux Desktop et. al)

cd PATH/linux-client
npm install
npm start

Websocket JSON structure

Note: For quick testing, use the Google Chrome Advanced REST Client

Desired command to execute on Linux client

someCommand --option1 value1 -o value2 value3

Corresponding Websocket JSON

  {
    "command":"someCommand",
    "args":["--option1", "value1", "-o", "value2", "value3"]
  }

JSON Samples:

{"command":"raspivid","args":["-o","example_video.h264","-t","20000","-w","1280","-h","720","-fps","30"]}

{"command":"ls","args":[]}

Copyright and License

Copyright © 2017 Aidan Hoolachan using the MIT License.

Note

I developed this small application as a minor testing tool for an IoT project, so I didn't spare time to make it configurable (but it works!). I'll add configuration options as needed. I have a few other networking projects on the horizon that will work with webRTC and tcp, so I'll add those modules to the suite.