Thank you so much for the kind words! It really means a lot, especially from someone who understands the effort involved. I&#x27;m thrilled that it&#x27;s resonating with fellow low-level systems fans.

This is amazing work. Most people don’t realize how much effort and depth there is behind writing a TCP&#x2F;IP stack and plugging it into xv6 with virtio-net and sockets. Huge respect for making it public. Projects like this are gold for those of us who love low-level systems.

Thank you! I completely agree, the complexity is definitely hidden by modern tools and abstractions. It&#x27;s a challenging but rewarding project. You should give it a try, it&#x27;s a fantastic way to learn!

Awesome work! Thank you for showing it to the world!I&#x27;ve considered writing a network stack myself. It&#x27;s much more complex than most people can imagine. We have great tooling for TCP and that makes people believe it&#x27;s simple technology. It&#x27;s not.

Thank you! And good luck with the labs, they&#x27;re a great learning experience.

Well done. I am actually solving the labs rn. I am on mmap, trying to get fork to work :)

Thanks for asking! It&#x27;s compiled with -march=rv64g, so it uses the standard general-purpose extensions (IMAFD) and doesn&#x27;t rely on anything exotic. Running it on bare metal is definitely a challenge I&#x27;d like to try someday! For now, the virtio-net driver is tightly coupled with QEMU, so a different network driver would be needed for specific hardware.

Are you using any RISC-V extensions? If so, which? I couldn&#x27;t find this information on the xv6 project page.
It would be cool if you could run this project in bare metal.

Yes, that&#x27;s correct! Both TCP and UDP are implemented. There&#x27;s a udpecho server included as a sample application you can use to test it out.

The readme implies that UDP is included. Is that true?

Hi HN,To truly understand how operating systems and network protocols work, I decided to combine two classic learning tools: the xv6 teaching OS and a from-scratch TCP&#x2F;IP stack.I&#x27;m excited to share the result: my own from-scratch TCP&#x2F;IP networking stack running directly inside the xv6-riscv (<a href="https:&#x2F;&#x2F;github.com&#x2F;pandax381&#x2F;xv6-riscv-net" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;pandax381&#x2F;xv6-riscv-net</a>) kernel.The project uses a modern virtio-net driver, allowing it to run seamlessly in QEMU and communicate with the host machine.Key features:- From-Scratch Stack: The core is powered by microps (<a href="https:&#x2F;&#x2F;github.com&#x2F;pandax381&#x2F;microps" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;pandax381&#x2F;microps</a>), a TCP&#x2F;IP stack I originally wrote to run in user-space as a personal project to learn the low-level details of networking.- Kernel Integration: This project ports microps from user-space into the xv6-riscv kernel.- Socket API: Implements standard system calls (socket, bind, accept, etc.) to enable network application development.- User-level Tools: Comes with a simple ifconfig command, plus tcpecho and udpecho servers to demonstrate its capabilities.This has been a fantastic learning experience. My goal was to demystify the magic behind network-aware operating systems by building the components myself.I&#x27;d love to hear your feedback and answer any questions!

Show HN: I integrated my from-scratch TCP/IP stack into the xv6-riscv OS