[tor-bugs] #29128 [Core Tor/Tor]: Place complete obfs4 bridge line in accessible location

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#29128: Place complete obfs4 bridge line in accessible location
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 Reporter:  phoul                                |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  unspecified
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-pt, tor-doc,                     |  Actual Points:
  040-deferred-20190220                          |
Parent ID:  #30471                               |         Points:
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor28
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Comment (by phw):

 Replying to [comment:9 nickm]:
 > Is there a standardized way for Tor to learn from the PT which fields it
 should put in the Bridge line?  It knows the `fingerprint`, and it has a
 good guess about the `address` field (though the PT may want to override
 that), but it  usually needs the PT's help to learn the `port` and any
 other fields.
 [[br]]
 I believe that all we need is in the `SMETHOD` line that Tor reads from
 the PT proxy's stdout. Our [https://gitweb.torproject.org/torspec.git/tree
 /pt-spec.txt#n544 pt-spec.txt] documents its format as:
 {{{
 SMETHOD <transport> <address:port> [options]
 }}}
 Note that `[options]` will need a bit of processing because
 [https://gitweb.torproject.org/torspec.git/tree/pt-spec.txt#n555 it's
 currently defined] as `ARGS:[<Key>=<Value>,]+[<Key>=<Value>]`.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29128#comment:11>
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