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When using GSSAPI we need a valid service ticket to talk to the LDAP
server. If the ticket is expired the LDAP client returns with 'Can't
contact LDAP server'. Currently we set the backend offline if this error
occurs although the server is still available. This patch checks if the
TGT is expired and tries to renew the credentials before going offline.
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The retun values are still not directly used with ldap libraries that still do
their own name resolution, but this patch introduces a very basic framework to
have a multiple providers in one domain use and share a single failover
service if they want to.
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When possible using a macro that correctly deals with tstate
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Split enum task in a separate file.
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Also start adding some infrastructure to use the USN counter when available.
In particular add a place to add generic attrs mapping, ie attributes that are
neither user nor group specific.
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Also fic sdap_get_generic_send() to be a bit more "generic" :-)
Also figs bugs within it.
This patch allow us 2 good things.
A) we check that the server effectively supports GSSAPI auth before we try to
use it.
B) against IPA it substantially cuts delays when the server is offline because
it uses a 5 second async timeout on the connection and doesn't try to do a
slow synchronous kinit+sasl_bind if the server is not even available.
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This patch uses a wrapper to kill the ldap connection when we are marked
offline. This also makes sure we do not try to reuse a bad connection handler
after a fatal error.
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Nested groups weren't properly handled.
Add 2 pass strategy to update groups memberships
Stuff work as expected when enumeration is enabled now.
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Go offline in case of hard errors too. It makes no sense to keep trying too
often when you have bad credentials for example.
Also delay starting the enumeration thread so that we finish initializations
first (bind to ldap is still a blocking operation and this may interfere with
clients/monitor registrations).
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Put all init functions in their own file so that the other files can be reused in
other providers w/o having them in the way.
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The sdap_id_connect_* request tries to bind to an LDAP server with
the default credentials. Only the opts component of the sdap_id_ctx
context is used. A new request sdap_cli_connect_* is created which
expects only the opts pointer as parameter and not the whole context.
This makes it reusable by other providers.
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Inits krb5 credentials, if sasl mech is GSSAPI.
Tested with GSSAPI and host keytab as well as user credentials.
Updates also manpages with the new options.
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This reverts commit 8c50bd085c0efe5fde354deee2c8118887aae29d.
Amended: commit 1016af2b1b97ad4290ccce8fa462cc7e3c191b2e also made
use of the SYSLOG_ERROR() macro, so those portions of that code
also needed to be reverted.
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This is just a band-aid until ELAPI is fully functional and ready to
use.
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This patch makes basic options multiype, the init function assigns
a type from the initialization array, and processes values fetched
from confdb accordingly.
4 types are supported so far: string, number, blob and boolean
Also convert defines into enums where appropriate.
Add fetch functions that check the requested type.
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Add helpers functions to query/set the offline status per backend.
Now all providers share the same offline status.
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The request was being freed, instead of marking it done and let the callback
free it when done. This was causing us to access freed memory, when trying to
set the next run.
Let the callback add new runs and free the request instead as normally we would
do with any other tevent_req async call.
Courtesy of valgrind again.
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After the recent changes we lost the capability to actually go offline.
Put back code that would mark the backend as offline when timeouts happen.
Make sure the enumeration code also obbeys the offline timeout, and
contributes in determining if we are offline or not.
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If enumerations are disabled for this domain, then do not start the
enumeration task.
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Always immediately return to DP, and update users/groups in the background.
Also implements an optimization to retrieve only changed/new users/groups
by filtering using the modifyTimestamp after the first query.
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The way openldap libraries work, require to have a single engine per
connection as all replies are read at the same time. So we need to
always read anything that comes in from the wire and then loop to
dispatch results to the requests that are waiting.
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This uses and exapands the async helpers.
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