32 releases (19 breaking)

0.19.0 Jun 5, 2024
0.17.0 Apr 2, 2024
0.16.0 Mar 4, 2024
0.13.0 Dec 4, 2023
0.0.0 Jun 24, 2021

#17 in #arti

Download history 1978/week @ 2024-03-04 612/week @ 2024-03-11 946/week @ 2024-03-18 1432/week @ 2024-03-25 905/week @ 2024-04-01 1410/week @ 2024-04-08 225/week @ 2024-04-15 201/week @ 2024-04-22 455/week @ 2024-04-29 264/week @ 2024-05-06 156/week @ 2024-05-13 784/week @ 2024-05-20 501/week @ 2024-05-27 382/week @ 2024-06-03 772/week @ 2024-06-10 1140/week @ 2024-06-17

3,094 downloads per month
Used in 13 crates (2 directly)


73K SLoC


Code to fetch, store, and update Tor directory information.


This crate is part of Arti, a project to implement Tor in Rust.

In its current design, Tor requires a set of up-to-date authenticated directory documents in order to build multi-hop anonymized circuits through the network.

This directory manager crate is responsible for figuring out which directory information we lack, downloading what we're missing, and keeping a cache of it on disk.

Compile-time features

  • mmap (default) -- Use memory mapping to reduce the memory load for reading large directory objects from disk.

  • routerdesc -- (Incomplete) support for downloading and storing router descriptors.

  • compression (default) -- Build support for downloading compressed documents. Requires a C compiler.

  • bridge-client: Provide APIs used to fetch and use bridge information.

  • full -- Enable all features above.

Non-additive features

  • static -- Try to link with a static copy of sqlite3.

Experimental and unstable features

Note that the APIs enabled by these features are NOT covered by semantic versioning[^1] guarantees: we might break them or remove them between patch versions.

  • experimental-api: Add additional non-stable APIs to our public interfaces.

  • dirfilter: enable an experimental mechanism to modify incoming directory information before it is used.

  • experimental: Enable all the above experimental features.

[^1]: Remember, semantic versioning is what makes various cargo features work reliably. To be explicit: if you want cargo update to only make safe changes, then you cannot enable these features.

License: MIT OR Apache-2.0


~1M SLoC