[tor-bugs] #6666 [Stem]: Stem wrapper method for the EXTENDCIRCUIT control command

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#6666: Stem wrapper method for the EXTENDCIRCUIT control command
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 Reporter:  neena   |          Owner:  neena            
     Type:  task    |         Status:  needs_information
 Priority:  normal  |      Milestone:                   
Component:  Stem    |        Version:                   
 Keywords:          |         Parent:                   
   Points:          |   Actualpoints:                   
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Comment(by neena):

 Replying to [comment:2 atagar]:
 > {{{
 > However, there's still a couple mysteries...
 >
 > * When I was offline I got the following stacktrace...
 >
 > ======================================================================
 >
 > ERROR: test_extendcircuit
 >
 > ----------------------------------------------------------------------
 > Traceback:
 >   File "/home/atagar/Desktop/stem/test/integ/control/controller.py",
 line 373, in test_extendcircuit
 >     circ_id = controller.extend_circuit(0)
 >   File "/home/atagar/Desktop/stem/stem/control.py", line 1109, in
 extend_circuit
 >     raise stem.socket.ProtocolError("EXTENDCIRCUIT returned unexpected
 response code: %s" % response.code)
 > ProtocolError: EXTENDCIRCUIT returned unexpected response code: 512
 > ----------------------------------------------------------------------
 >
 >   However, according to the control-spec the 512 response code is for
 "Syntax
 >   error in command argument". That doesn't make sense if we're failing
 because
 >   we lack a connection.

 Odd. I get
 "551 Couldn't start circuit" when I check manually,
 and "ProtocolError: EXTENDCIRCUIT returned unexpected response code: 551"
 when I run
 the tests (after disabling check_online). I'm running "Tor version
 0.2.3.24-rc (git-f1f16882e345cd4c)".
 If you're still getting this, can you tell me what the value of
 response.message is.

 > * Is the 'path' argument for EXTENDCIRCUIT the circuits that we build
 through,
 >   or the relays to be chosen from when building a single hop? The
 EXTENDCIRCUIT
 >   description doesn't say, which seems to me to be a weakness in the
 spec.
 > }}}

 It's the list of relays with which the circuit should be extended.
 Extending "3 BUILT a,b,c" with "EXTENDCIRCUIT 3 x,y,z" will make it
 "3 BUILT a,b,c,x,y,z"

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/6666#comment:4>
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