I integrated my from-scratch TCP/IP stack into the xv6-riscv OS
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/IP stack. I'm excited to share the result: my own from-scratch TCP/IP networking stack running directly inside the xv6-riscv (https://github.com/pandax381/xv6-riscv-net) 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…
In plain words
This project integrates a from-scratch TCP/IP networking stack into the xv6-riscv teaching operating system, enabling network communication through a virtio-net driver in QEMU. It ports the microps stack from user-space into the kernel and implements standard socket system calls. The tool is designed for developers and students who want to understand how operating systems and network protocols work at a fundamental level by studying and running actual implementations.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
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/IP stack. I'm excited to share the result: my own from-scratch TCP/IP networking stack running directly inside the xv6-riscv (https://github.com/pandax381/xv6-riscv-net) 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 (https://github.com/pandax381/microps), a TCP/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'd love to hear your feedback and answer any questions!
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