[tor-bugs] #19043 [Core Tor/Tor]: Implementation of prop224 ESTABLISH_INTRO cell

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#19043: Implementation of prop224 ESTABLISH_INTRO cell
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 Reporter:  alec.heif                            |          Owner:
     Type:  enhancement                          |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.2.???
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-hs, prop224, 6.s194,             |  Actual Points:
  0210-proposed, TorCoreTeam201608               |
Parent ID:  #17241                               |         Points:  3
 Reviewer:  asn, dgoulet                         |        Sponsor:
                                                 |  SponsorR-must
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Comment (by dgoulet):

 My two cents. I like the idea very much. Scales much better with future
 version. We can have a single version agnostic function that takes the
 token and re-route it to the right function.

 Yes, tokens have different size depending on the version (well except rdv
 token but that might not be true for version 4 and onward). I would add an
 `enum` of the possible type (in this case only two exists) which will
 makes it nicer if we ever add more types. And the token length as well.
 You might also want to put a `or_circuit_t` in there? :)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19043#comment:18>
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