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[tor-bugs] #23057 [Core Tor/Stem]: Sockstat connection resolution unreliable



#23057: Sockstat connection resolution unreliable
-------------------------------+--------------------
     Reporter:  atagar         |      Owner:  atagar
         Type:  defect         |     Status:  new
     Priority:  Low            |  Milestone:
    Component:  Core Tor/Stem  |    Version:
     Severity:  Minor          |   Keywords:  utils
Actual Points:                 |  Parent ID:
       Points:                 |   Reviewer:
      Sponsor:                 |
-------------------------------+--------------------
 Recently our Jenkins, which run Stem's tests, hosts upgraded their Debian
 distribution. Doing so caused our test_connections_by_sockstat to start
 failing...

 {{{
 ======================================================================
 FAIL: test_connections_by_sockstat
 ----------------------------------------------------------------------
 Traceback (most recent call last):
   File "/srv/jenkins-workspace/workspace/stem-tor-
 ci/test/integ/util/connection.py", line 55, in
 test_connections_by_sockstat
     self.check_resolver(Resolver.SOCKSTAT)
   File "/srv/jenkins-workspace/workspace/stem-tor-ci/test/require.py",
 line 58, in wrapped
     return func(self, *args, **kwargs)
   File "/srv/jenkins-workspace/workspace/stem-tor-
 ci/test/integ/util/connection.py", line 37, in check_resolver
     self.fail('Unable to find our controller connection with %s (%s).
 Connections found were...\n\n%s\n\nCommand output was...\n\n%s' %
 (resolver, resolver_command, '\n'.join(map(str, connections)),
 resolver_output))
 AssertionError: Unable to find our controller connection with sockstat
 (sockstat). Connections found were...

 Connection(local_address=u'127.0.0.1', local_port=1024,
 remote_address=u'127.0.0.1', remote_port=38974, protocol=u'tcp',
 is_ipv6=False)
 Connection(local_address=u'127.0.0.1', local_port=1024,
 remote_address=u'127.0.0.1', remote_port=38966, protocol=u'tcp',
 is_ipv6=False)

 Command output was...

 [u'USER     PROCESS              PID      PROTO  SOURCE ADDRESS
 FOREIGN ADDRESS           STATE', u'jenkins  tor                  4759
 tcp4   127.0.0.1:1024            *:*                       LISTEN',
 u'jenkins  tor                  4759     tcp4   127.0.0.1:1024
 *:*                       LISTEN', u'jenkins  tor                  4759
 tcp4   127.0.0.1:1024            127.0.0.1:38974           ESTABLISHED',
 u'jenkins  tor                  4759     tcp4   127.0.0.1:1024
 127.0.0.1:38966           ESTABLISHED', u'jenkins  sockstat
 4930     tcp4   127.0.0.1:38912           127.0.0.1:1111
 ESTABLISHED', u'jenkins  sockstat             4930     tcp4
 127.0.0.1:38912           127.0.0.1:1111            ESTABLISHED',
 u'jenkins  python               18063    tcp4   127.0.0.1:38912
 127.0.0.1:1111            ESTABLISHED', u'jenkins  python
 18063    tcp4   127.0.0.1:38912           127.0.0.1:1111
 ESTABLISHED']
 }}}

 Here's the sockstat output...

 {{{
 USER     PROCESS              PID      PROTO  SOURCE ADDRESS
 FOREIGN ADDRESS           STATE
 jenkins  python               18337    tcp4   127.0.0.1:41728
 127.0.0.1:1111            ESTABLISHED
 jenkins  python               18337    tcp4   127.0.0.1:41728
 127.0.0.1:1111            ESTABLISHED
 jenkins  tor                  20588    tcp4   127.0.0.1:1024
 *:*                       LISTEN
 jenkins  tor                  20588    tcp4   127.0.0.1:1024
 *:*                       LISTEN
 jenkins  tor                  20588    tcp4   127.0.0.1:1024
 127.0.0.1:41814           ESTABLISHED
 jenkins  tor                  20588    tcp4   127.0.0.1:1024
 127.0.0.1:41806           ESTABLISHED
 jenkins  sockstat             20594    tcp4   127.0.0.1:41728
 127.0.0.1:1111            ESTABLISHED
 jenkins  sockstat             20594    tcp4   127.0.0.1:41728
 127.0.0.1:1111            ESTABLISHED
 }}}

 Note that our socksport (1024) is listed twice, but our controlport (1111)
 isn't among the tor process entries at all. However, we're showing
 connections *to* the controlport.

 Did some searching around but stumped. If we can fix sockstat to once
 again work on the jenkins hosts I'm all ears - otherwise we'll drop this
 connection resolution method in Stem 2.0.0.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23057>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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