[tor-bugs] #16966 [Tor]: Better solution for an HS client descriptor cache entry to expire

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#16966: Better solution for an HS client descriptor cache entry to expire
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 Reporter:  dgoulet           |          Owner:
     Type:  enhancement       |         Status:  new
 Priority:  normal            |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor               |        Version:
 Keywords:  SponsorR, tor-hs  |  Actual Points:
Parent ID:                    |         Points:
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 With #16389, we've added a 5 minutes timeout for an entry in the client
 descriptor cache to expire which is not ideal (details here
 https://trac.torproject.org/projects/tor/ticket/16389#comment:16).

 One solution would be to add a counter in the hidden service descriptor
 that changes at with a new descriptor. To quote arma's in comment above:

 {{{
 Maybe this argues for hidden services putting the nonce into their HS
 descs
 anyway, and publishing an updated HS desc every time they lose contact
 with
 their intro points, to give clients a way to recognize when the HS has
 acknowledged that things changed? Yuck.
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16966>
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