When a CRL is specified in the ApiListener configuration, Icinga 2 only
used it when connections were established so far, but not when a
certificate is requested. This allows a node to automatically renew a
revoked certificate if it meets the other conditions for auto-renewal
(issued before 2017 or expires in less than 30 days).
The function was never used and it's implementation contains a bug where
a buffer of too small size is used as a paramter to ERR_error_string.
According to the `man 3 ERR_error_info`, the buffer has to be at least
256 bytes in size.
Also the function seems of limited use as it allows to output the tag
object used with additional error information for exceptions in Boost.
However, you boost::get_error_info<>() just returns the value type but
not the full tag object from the exception.
Merge AsyncTryActivateZonesStage and TryActivateZonesStageCallback and
name the result TryActivateZonesStage. The old split was a leftover from
the one being a callback function with no actual meaningful separation.
Anonymous connections are normally only used for requesting a
certificate and are closed after this request is received. However, the
request is only sent if the child has successfully verified the
certificate of its parent so that it is an authenticated connection from
its perspective. In case this verification fails, both ends view it as
an anonymous connection and never actually use it but attempt a
reconnect after 10 seconds leaking the connection. Therefore close it
after a timeout.
RelayMessageOne used to relay the message only to one other endpoint for
other zones, which is fine, as long as the target zone is a child/parent
zone but breaks if the target zone is a global one. In this case, the
message has to be forwarded within the local zone as well as to one node
in each child zone.
The initial config object sync for each new connection (in
`ApiListener::SendRuntimeConfigObjects()`) only considers currently
existing objects and has no way to pass the information that objects
were deleted in the meantime.
This commit logs config object deletions to the replay log if required
so that there is a chance that it will be propagated to nodes that were
offline when the deletion happened.
Note that this can only be considered a workaround as the replay log
might be pruned or could even be completely disabled. Also, there still
seems to be a race-condition between the config sync and replay log of
multiple new connections at the same time.
