75 lines
2.1 KiB
Markdown
75 lines
2.1 KiB
Markdown
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# Protocol support and compatibility in Arti
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Summary:
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There is no support in Arti yet for running as a relay, running as a
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directory authority, using onion services, or providing onion services.
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There is also no anticensorship support. We hope to build these in the
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future, but the timeline is not set.
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Arti aims for compatibility with all _currently recommended_ Tor protocols.
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We have not implemented, and do not plan to implement, obsolete versions of
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anything.
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## Protocol support
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Here's a checklist of Tor sub-protocol versions that we currently have
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client-side support for:
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* [x] `Cons=2` [^1]
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* [x] `Desc=2`
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* [x] `DirCache=2`
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* [x] `FlowCtrl=0`
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* [x] `FlowCtrl=1`
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* [ ] `HSDir=2`
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* [ ] `HSIntro=4` (maybe?)
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* [ ] `HSIntro=5`
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* [ ] `HSRend=2`
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* [x] `Link=4`
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* [ ] `Link=5`
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* [x] `Microdesc=2` [^1]
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* [ ] `Padding=2`
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* [x] `Relay=2`
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* [ ] `Relay=3` (not sure whether we're compliant with this client-side)
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[^1]: If a consensus method before 28 is used, we won't find IPv6 addresses
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correctly. All such consensus methods are currently obsolete, though, and
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authorities won't negotiate them any more.
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There is no relay-side support for anything right now. If there were, we'd
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want to support:
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* [ ] `Cons=2`
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* [ ] `Desc=2`
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* [ ] `DirCache=2`
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* [ ] `FlowCtrl=0`
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* [ ] `FlowCtrl=1`
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* [ ] `HSDir=2`
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* [ ] `HSIntro=4` (maybe)
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* [ ] `HSIntro=5`
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* [ ] `HSRend=2`
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* [ ] `Link=4`
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* [ ] `Link=5`
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* [ ] `LinkAuth=3`
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* [ ] `Microdesc=2`
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* [ ] `Padding=2`
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* [ ] `Relay=2`
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* [ ] `Relay=3`
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We do not ever plan to support these:
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* `Cons=1` (obsolete format)
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* `Desc=1` (obsolete format)
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* `DirCache=1` (no relays still support this)
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* `HSDir=2`
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* `HSIntro=3` (will be obsolete in 2021)
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* `HSRend=1` (will be obsolete in 2021)
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* `LinkAuth=1` (only used by RSA-only relays)
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* `Microdesc=1` (obsolete format)
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* `Padding=1` (deprecated)
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We presume that these proposals will be accepted and merged into Tor:
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* [ ] 285 (Directory documents should be standardized as utf-8, tor#40131)
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* [ ] 315 (Make some directory fields "required", tor#40132)
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