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Re: [tor-bugs] #9546 [Tor]: Link handshake fails with "Received unexpected cell command 10" when clocks are skewed



#9546: Link handshake fails with "Received unexpected cell command 10" when clocks
are skewed
------------------------------------------------+---------------------------
 Reporter:  zwol                                |          Owner:                    
     Type:  defect                              |         Status:  needs_review      
 Priority:  major                               |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor                                 |        Version:  Tor: 0.2.4.15-rc  
 Keywords:  tor-bridge tor-client 023-backport  |         Parent:                    
   Points:                                      |   Actualpoints:                    
------------------------------------------------+---------------------------

Comment(by arma):

 Looking through logs on my bridge. It looks like I am seeing some of these
 from connections via obfsproxy. That race is surprising, yes?

 {{{
 Aug 09 06:35:10.000 [info] channel_tls_handle_cell(): Received unexpected
 cell command 5 in chan state opening / conn state waiting for
 renegotiation or V3 handshake; closing the connection.
 Aug 09 06:35:10.000 [info] channel_tls_process_versions_cell(): Negotiated
 version 3 with 127.0.0.1:48158; Sending cells: VERSIONS CERTS NETINFO
 Aug 09 06:35:10.000 [info] channel_tls_process_versions_cell(): Negotiated
 version 3 with 127.0.0.1:47601; Sending cells: VERSIONS CERTS NETINFO
 Aug 09 06:35:10.000 [info] channel_tls_process_netinfo_cell(): Got good
 NETINFO cell from 127.0.0.1:48158; OR connection is now open, using
 protocol version 3. Its ID digest is
 0000000000000000000000000000000000000000. Our address is apparently
 128.31.0.34.
 }}}

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9546#comment:16>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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