nowfound

Dev tools · July 26, 2023

Rust library for set operations on CIDRs, you can try it in a terminal

I had a work objective that required me to be able to "slice" a subnet by a smaller subnet and I didn't manage to find any other libraries that accomplish this kind of computation so I set out to write one myself. Supports calculating CIDR unions, differences, and complements. The rest of the existing set operations don't really make sense for CIDRs since the only way they can overlap is if one fully contains the other (or they are equivalent). I figured a binary tree-like data structure would be the most memory efficient way to represent this, but I'm super open to any feedback especially…

Rust library for set operations on CIDRs, you can try it in a terminal launched on July 26, 2023 with 9 votes, #1,657 of 4,347 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 3 years on.

What it does

Fragmented Classless Inter-Domain Routing (FCIDR). Contribute to nicholaschiasson/fcidr development by creating an account on GitHub.

In the maker’s words, at launch

I had a work objective that required me to be able to "slice" a subnet by a smaller subnet and I didn't manage to find any other libraries that accomplish this kind of computation so I set out to write one myself. Supports calculating CIDR unions, differences, and complements. The rest of the existing set operations…

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