[tor-bugs] #23110 [Core Tor/Tor]: prop224: Rate limit HS descriptor reuploads

[Tor Bug Tracker & Wiki]

#23110: prop224: Rate limit HS descriptor reuploads
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     Reporter:  asn           |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:  Tor: 0.3.2.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:  prop224 prop224-extra tor-hs
Actual Points:                |  Parent ID:
       Points:  1             |   Reviewer:
      Sponsor:  SponsorR-can  |
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 prop224 services currently re-upload their HS descriptor everytime they
 receive new dir info (descriptors) if they are close to 100% visibility of
 the network.

 This is done to make sure we always publish to the right HSDir nodes, but
 it could also lead to uploading lots of descriptors in a small time frame.

 A good fix for this would be to cache the previous set of responsible
 HSDirs (maybe on the desc), and avoid reuploading the same descriptor if
 the set of HSDirs is the same even if we received new dirinfo.

 Also we should probably add a cache to avoid publishing the same
 descriptor multiple times in a small timeframe anyway.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23110>
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