[tor-bugs] #9798 [Tor]: Tor authorities on master are causing clock skew warns on every reachability test

[Tor Bug Tracker & Wiki]

#9798: Tor authorities on master are causing clock skew warns on every
reachability test
----------------------+------------------------------------
 Reporter:  arma      |          Owner:
     Type:  defect    |         Status:  new
 Priority:  normal    |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor       |        Version:
 Keywords:  tor-auth  |  Actual Points:
Parent ID:            |         Points:
----------------------+------------------------------------
 A growing number of relay operators started complaining tonight of lines
 like
 {{{
 Sep 21 05:22:01.021 [Warning] Received NETINFO cell
 with skewed time from server at 76.73.17.194:9090. It seems that our
 clock is ahead by 15969 days, 3 hours, 22 minutes, or that theirs is
 behind.
 Tor requires an accurate clock to work: please check your time and date
 settings.
 }}}

 That's 1970. Mike maintains his clock is correct. And also he upgraded to
 git master recently.

 In parallel, git commit 1d0ba9 does
 {{{
 -  /* Timestamp. */
 -  set_uint32(cell.payload, htonl((uint32_t)now));
 +  /* Timestamp, if we're a relay. */
 +  if (! conn->handshake_state->started_here)
 +    set_uint32(cell.payload, htonl((uint32_t)now));
 }}}

 That means every outgoing connection from a directory authority puts a
 time of 0 in the netinfo cell during its handshake. And relays are
 programmed to log_warn if they get told a time from an authority that
 disagrees with their opinion about what time it is.

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9798>
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