[tor-bugs] #4773 [Tor Bridge]: Implement Extended OR port (part of proposal 180)

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#4773: Implement Extended OR port (part of proposal 180)
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 Reporter:  asn         |          Owner:                    
     Type:  defect      |         Status:  new               
 Priority:  normal      |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor Bridge  |        Version:                    
 Keywords:              |         Parent:  #3591             
   Points:              |   Actualpoints:                    
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Comment(by asn):

 Nick, how would you implement this? I want to prepare an implementation
 plan before starting coding stuff, since it seems a bit messy.

 My plan is to define a new listener type to handle 'Extended OR'
 connections, handle the 'Extended OR protocol' in
 `connection_init_accepted_conn()` and when the 'Extended OR protocol' is
 done, handle the connection like a `CONN_TYPE_OR` connection (maybe by
 calling `connection_tls_start_handshake()`).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4773#comment:1>
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