# saminiir/level-ip

A hacker's userspace TCP/IP stack

Repository: https://github.com/saminiir/level-ip
Canonical: https://ross.abutalabs.com/products/level-ip
Homepage: https://www.saminiir.com
Language: C
License: MIT
License Family: permissive
Topics: tcp, socket-api, tcp-ip, tuntap, userspace-networking
Last push: 2022-12-13T13:14:33+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 3841, "days_push": 1359, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3132, forks 418 (observed 2026-08-28T04:07:45.561720+00:00)

## What it is
A userspace TCP/IP stack for Linux implemented in C using TUN/TAP devices, with an accompanying blog series explaining Ethernet, ARP, IPv4, ICMP, and TCP. It is primarily an educational project for learning network internals and the Linux socket API.

## Use cases
- learn how a TCP/IP stack works by reading C code
- implement a userspace TCP stack with TUN/TAP
- study TCP handshake and retransmission logic
- understand the Linux socket API from the inside
- experiment with ARP, IPv4, and ICMP in userspace

## When to choose
- you want to learn TCP/IP and Linux network programming hands-on
- you need a small readable reference implementation of a TCP stack
- you want to follow a guided blog series while coding

## When to avoid
- you need a production-grade network stack
- you need non-Linux platform support
- you need active development or long-term maintenance

## Facets
- artifact type: library
- maturity: maintenance
- function: networking, developer-tools
- domain: networking, operating-systems, education, tutorials
- platform: c, cli
- tags: tcp-ip, tuntap, userspace-networking, socket-api, learning-project, linux

## Member repositories
- saminiir/level-ip (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:45.561720+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:45:57.201522+00:00, confidence not recorded.
  - readme: https://github.com/saminiir/level-ip (fetched 2026-08-28T04:07:45.561720+00:00, sha 363214c42357)
  - homepage: https://www.saminiir.com (fetched 2026-08-29T09:40:59.097236+00:00, sha e3c5be26a5bb)
  - site_page: https://www.saminiir.com/installing-arch-linux-on-dell-xps-15 (fetched 2026-08-29T09:40:59.102193+00:00, sha 347052e43e11)
  - site_page: https://www.saminiir.com/hey-you-there (fetched 2026-08-29T09:40:59.100290+00:00, sha 470742c93f8d)
- Data as of 2026-08-30T08:39:29.467469+00:00.