[tor-bugs] #16824 [Core Tor/Tor]: Emit a warning message about side channel leaks when using relays as clients

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#16824: Emit a warning message about side channel leaks when using relays as
clients
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 Reporter:  starlight                            |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_revision
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.6.10
 Severity:  Normal                               |     Resolution:
 Keywords:  mike-can, tor-client tor-relay       |  Actual Points:
  sidechannel logging easy                       |
Parent ID:                                       |         Points:  1
 Reviewer:  mikeperry                            |        Sponsor:
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Comment (by n-critser):

 mikeperry,
 What do you think the best way to come to a consensus on this would be?
 Seems like we have 2 options available for deciding if a user is both a
 relay and a client:
 1. configuration
 2. execution of code
 If using only the SOCKSPORT catches too many false positives then, I could
 check some of the other existing values to ensure that the user is
 definitely configured to be both.
 Otherwise, I would need to find some other solid indicator functions for
 both and base the warning on those.
 Which do you prefer?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/16824#comment:50>
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