[tor-bugs] #7733 [Tor]: Two channels required for bootstrap

Tor Bug Tracker & Wiki blackhole at torproject.org
Mon Sep 22 04:00:44 UTC 2014


#7733: Two channels required for bootstrap
-------------------------+-------------------------------------------------
     Reporter:  dcf      |      Owner:  nickm
         Type:  defect   |     Status:  needs_review
     Priority:  normal   |  Milestone:  Tor: 0.2.6.x-final
    Component:  Tor      |    Version:
   Resolution:           |   Keywords:  tor-client, flashproxy,
Actual Points:           |  026-triaged-0, nickm-patch
       Points:           |  Parent ID:
-------------------------+-------------------------------------------------

Comment (by dcf):

 Replying to [comment:14 andrea]:
 > Review: the patch looks like it does what it says it does, but I'd feel
 better about it if we had a way to repro the problem and test that this is
 actually the cause.

 It's really easy to reproduce. Just use a SOCKS tunnel as a
 pseudo–pluggable transport.
 {{{
 ssh -v -N -D 9001 people.torproject.org
 }}}

 Without a fingerprint, you get two connections through the tunnel:
 {{{
 tor ClientTransportPlugin "dummy socks5 127.0.0.1:9001" UseBridges 1
 Bridge "dummy 128.31.0.34:9101"
 }}}
 {{{
 debug1: Connection to port 9001 forwarding to socks port 0 requested.
 debug1: channel 2: new [dynamic-tcpip]
 debug1: Connection to port 9001 forwarding to socks port 0 requested.
 debug1: channel 3: new [dynamic-tcpip]
 }}}

 If you include the fingerprint, you only get one:

 {{{
 tor ClientTransportPlugin "dummy socks5 127.0.0.1:9001" UseBridges 1
 Bridge "dummy 128.31.0.34:9101 9695DFC35FFEB861329B9F1AB04C46397020CE31"
 }}}
 {{{
 debug1: Connection to port 9001 forwarding to socks port 0 requested.
 debug1: channel 2: new [dynamic-tcpip]
 }}}

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7733#comment:15>
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