[tor-bugs] #5483 [Pluggable transport]: managed pluggable transports should be able to pause Tor's circuit-building?

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#5483: managed pluggable transports should be able to pause Tor's circuit-
building?
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 Reporter:  arma                 |          Owner:  asn
     Type:  enhancement          |         Status:  new
 Priority:  normal               |      Milestone:     
Component:  Pluggable transport  |        Version:     
 Keywords:                       |         Parent:     
   Points:                       |   Actualpoints:     
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Comment(by asn):

 If you use pluggable transport proxy managed mode, you should be able to
 avoid this problem, by sending your `CMETHOD` lines only after your
 transport has fully bootstrapped.

 If you use external mode, things are harder. You will probably have to
 wait till TransportControlPort is implemented [0]. Then we will have to
 extend TransportControlPort to allow client transport proxies to connect
 to it (since it's designed only for server proxies at the moment). Then we
 will have to add a new command to TransportControlPort that does something
 like DisableNetwork, or allows better handling on when to connect to an
 obfuscated bridge.  We will also need to extend the 196 proposal, to make
 sure that Tor does not send traffic to the network before the
 TransportControlPort protocol is finished.

 All in all, the external-mode solution is not going to happen immediately,
 but it's one of the things that must happen before we call our pluggable
 transports stack actually robust. Any help on implementing
 TransportControlPort is more than welcome (#5408) :)

 [0]: https://gitweb.torproject.org/torspec.git/blob/HEAD:/proposals/196
 -transport-control-ports.txt

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5483#comment:3>
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