[tor-bugs] #2667 [Core Tor/Tor]: Exits should block reentry into the tor network

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#2667: Exits should block reentry into the tor network
-------------------------------------------------+-------------------------
 Reporter:  mikeperry                            |          Owner:  (none)
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.7
 Severity:  Normal                               |     Resolution:
 Keywords:  needs-proposal, tor-relay,           |  Actual Points:
  SponsorU-deferred                              |         Points:
Parent ID:                                       |  medium/large
 Reviewer:                                       |        Sponsor:
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Comment (by nickm):

 Replying to [comment:49 arma]:
 > Replying to [comment:5 nickm]:
 > > The only implementation challenge here will be doing efficient lookup
 of nodes by address or address:port.  (My intuition is that a linear
 search here will be too expensive.)  We can do that by adding another
 hashmap to node_t.
 >
 > Nick, has the world gotten any better since this comment six years ago?
 Assuming no, how much work do you think this hashmap would be? :)

 About a day's work.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/2667#comment:50>
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