[tor-bugs] #3695 [Tor Client]: Handling of ISO_STREAM is bogus

[Tor Bug Tracker & Wiki]

#3695: Handling of ISO_STREAM is bogus
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 Reporter:  rransom     |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  major       |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Client  |        Version:                    
 Keywords:              |         Parent:                    
   Points:              |   Actualpoints:                    
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 `connection_edge_compatible_with_circuit` prevents a stream with
 `ISO_STREAM` set from being associated to any circuit to which a stream
 (not necessarily a different stream) has already been associated.  Nothing
 else looks at `ISO_STREAM`.  (In other news,
 `connection_edge_streams_are_compatible` is dead code.)

 This treatment of `ISO_STREAM` should cause excess circuit creation
 (#3632) during anonymous directory operations, and it does not
 (explicitly) prevent a circuit which has had an `ISO_STREAM` stream
 attached to it from having a non-`ISO_STREAM` stream attached to it later.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/3695>
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