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Linux Networking Programming

Trio Tutorial – Simple TCP Chat Program – Part 4

Series Part 1: https://jaytuckey.name/2021/07/22/trio-tutorial-simple-tcp-chat-program-part-1/ Part 2: https://jaytuckey.name/2021/07/24/trio-tutorial-simple-tcp-chat-program-part-2/ Part 3: https://jaytuckey.name/2021/07/24/trio-tutorial-simple-tcp-chat-program-part-3/ In part 4 we look into making the server handle disconnections without crashing. We also look into how me can make messages quicker to distribute. For this code we use the trio functionality to wait for limited time for a task to complete, by using […]

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Linux Networking Programming

Trio Tutorial – Simple TCP Chat Program – Part 3

Series Part 1: https://jaytuckey.name/2021/07/22/trio-tutorial-simple-tcp-chat-program-part-1/ Part 2: https://jaytuckey.name/2021/07/24/trio-tutorial-simple-tcp-chat-program-part-2/ In part 3 we build more of the server. We build out the functionality to receive messages, then distribute them to all connected users. For this part we use Trio’s nurseries to start up new running tasks: https://trio.readthedocs.io/en/stable/reference-core.html#nurseries-and-spawning We use the nursery.start_soon() function to kick off new tasks […]

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Linux Networking Programming

Trio Tutorial – Simple TCP Chat Program – Part 2

Series Part 1: https://jaytuckey.name/2021/07/22/trio-tutorial-simple-tcp-chat-program-part-1/ In part 2 we look at making a tool to assist with testing the TCP server we are building: We use the built-in python socket library in the testclient: https://docs.python.org/3/library/socket.html Got any questions? Contact me: https://jaytuckey.name/about/

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Linux Networking Programming

Trio Tutorial – Simple TCP Chat Program – Part 1

I’ve made a video about making a simple TCP-based program using Python and Trio. The video is here: https://www.youtube.com/watch?v=6JM1hgjLV-A The features I plan to build are: each user has a long running tcp connection user is asked for name on connection user sends message each other connected user receives the message In part 1 we […]

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Linux Networking Uncategorized

How Websites Load – A deep dive into the IP network stack and how it is used to connect to a site

I’ve made a series of videos exploring the Internet Protocol Suite, and how it is used to make a connection to a website. It’s a deep dive into the stack, explaining all the way down to the ethernet frames that a computer sends on the local link.

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Linux Networking Systems Administration

A script to scan a network range and create Kea DHCP reservations for devices it finds

This script is very simple. It will scan a network range attached to the device it is run from, and will turn what it finds into a list of reservations for the Kea dhcp server – https://kea.readthedocs.io/ You run it something like this, giving it a network range to scan. Then network should be a […]