[tor-bugs] #10061 [Pluggable transport]: Complete specification for generalised PT composition

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#10061: Complete specification for generalised PT composition
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     Reporter:  infinity0            |      Owner:  infinity0
         Type:  enhancement          |     Status:  new
     Priority:  normal               |  Milestone:
    Component:  Pluggable transport  |    Version:
   Resolution:                       |   Keywords:
Actual Points:                       |  Parent ID:
       Points:                       |
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Comment (by infinity0):

 Here are some of the issues we ran into, when turning obfs-flash-client
 into a more general form. I've also done a simple language substitution to
 turn them into statements that are applicable to the server side, but I
 haven't thought them through so they might be less correct.

 Remote interface:
 - client: the outermost PT (that writes to the internet) might not '''send
 to''' a particular address. (e.g flashproxy-client)
 - server: the outermost PT (that reads from the internet) might not
 '''listen on''' a particular address. (not sure if we need to support
 this, even flashproxy's websocket-server isn't this weird)

 Real remote PT:
 - client: the remote '''bridge''' address (if any; see prev point), tor
 must '''give to''' the outermost PT, not the innermost as naive chaining
 achieves
 - server: the remote '''client''' address (if any; see prev point), tor
 must '''read from''' the outermost PT. (this might already be covered with
 ExtORPort handling)

 Per-bridge shared-secrets / other metadata:
 - client: this might be dynamic (from Tor), so needs to be passed per-
 connection.
 - server: this is probably static and can be input via config files. (not
 entirely sure about this)

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10061#comment:1>
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