[tor-bugs] #535 [Tor Relay]: servers should support hearing "not new descriptor"

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#535: servers should support hearing "not new descriptor"
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 Reporter:  arma                |           Type:  defect   
   Status:  new                 |       Priority:  major    
Milestone:  Tor: 0.2.2.x-final  |      Component:  Tor Relay
  Version:  0.2.0.8-alpha       |     Resolution:  None     
 Keywords:                      |         Parent:  #3327    
   Points:                      |   Actualpoints:           
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Changes (by nickm):

  * priority:  critical => major


Comment:

 If we want this in 0.2.2.x, the changes need to be MUCH MUCH smaller than
 adding new callbacks, changing interfaces, etc.  We already have the code
 in connection_dir_reached_eof that gets called on every response from the
 dirserver.  I'd like to change the architecture, but not for 0.2.2.

 So, what's the correct actual behavior here?

 We want to remember, for each authority, the 'published' time of the last
 descriptor that it accepted from us.  We want to have another global in
 router.c, something like "desc_clean_since", that remembers the last time
 that we had our descriptor accepted by sufficient authorities.  We can
 then replace "mark_my_descriptor_dirty_of_older_than" with a new function
 that declares the descriptor to be dirty if it is too old, OR if too much
 time has passed since sufficient authorities accepted one of our
 descriptors.

 Or another option is to look at the publication time for the version of
 our descriptor that's listed in the directory consensus.  This could
 probably use some pseudocode.  Also, it feels like something to do as a
 branch that gets merged first to 0.2.3.x for testing, then back to
 0.2.2.x: none of the solutions here feel as obvious and straightforwardly
 harmless as I'd want.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/535#comment:7>
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