[tor-bugs] #8402 [Tor]: Tor should help its transport proxy use a proxy, if needed.

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#8402: Tor should help its transport proxy use a proxy, if needed.
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     Reporter:  asn     |      Owner:
         Type:  defect  |     Status:  new
     Priority:  normal  |  Milestone:  Tor: 0.2.6.x-final
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:  tor-bridge pt flashproxy
Actual Points:          |  Parent ID:
       Points:          |
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Comment (by yawning):

 A ha, I'm blind, sorry.

 > If the pluggable transport proxy detects that the TOR_PT_PROXY
 > environment variable is set, it attempts connecting to it. On
 > success it writes to stdout: "PROXY true".
 > On failure it writes: "PROXY-ERROR <errormessage>".

 So dcf's variant of this is already in the proposal.  I'm not sure if
 attempting to connect to it is required (Would it be ok to just spit out
 "PROXY true" to acknowledge that it will use the proxy?), as that is
 potentially identifiable behaviour, but I don't have any other issues with
 the design and will probably look into adding this to pyptlib/liballium
 and adding support for this to obfsproxy.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8402#comment:11>
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