[sr-dev] git:master:7a1f2be3: ims_usrloc_pcscf: implementation of db_mode DB_ONLY (value 3) (#3279)

[GitHub]

Module: kamailio
Branch: master
Commit: 7a1f2be30ea68c4ee7ab71a32c88e31d136e7b71
URL: https://github.com/kamailio/kamailio/commit/7a1f2be30ea68c4ee7ab71a32c88e31d136e7b71

Author: petermarianF <62649923+petermarianF at users.noreply.github.com>
Committer: GitHub <noreply at github.com>
Date: 2022-12-06T10:51:58+01:00

ims_usrloc_pcscf:   implementation of db_mode DB_ONLY (value 3) (#3279)

* ims_usrloc_pcscf:   implementation of db_mode DB_ONLY (value 3)
  In order to support a redundant PCSCF configuration - i.e. a logical PCSCF
  consists of 2 physical nodes (node1 and node2) some enhancements were
  introduced for handling of contacts. Redundancy means that SIP messages
  for a client are normally handled by node1 but in case node1 is not
  reachable SIP messages are redirected to node2. Of course the DB_ONLY
  mode must work also for single PCSCF node configuration. Important aspects
  of this implementation are database integrity - i.e. avoid invalid table
  entries (for example data which are expired long time ago or have
  invalid states) - and keeping PCSCF cache in sync with database tables.
* A wrapper was built for method get_pcontact which tries to find the pcontact
  in cache and if search is not successful tries to download and insert from
  db location table - also some effort is added here to find the pcontact if it exists in cache.
  The contact expiry handler was modified to sync contact
  expiry in cache with db location entry and in case of real contact expiry
  sends PUBLISH to SCSCF to let NOTIFY finally delete the contact.
* An audit for older expired pcontacts was introduced which cares for
  getting rid of these contacts.
  Some code was introduced to help registering callbacks for contacts
  which are inserted into cache when being downloaded from database - for
  example ims_qos callback as at the time of insertion the message that triggered
  the original callback registering is long gone.
* changes required for PR #3279
* add modparam db_mode to usrloc_api
* remove unused method db_delete_presentity_uri_from_pua

Co-authored-by: Annemarie Mandl <mandl at rpmbld.novalocal>

---

Modified: src/modules/ims_usrloc_pcscf/README
Modified: src/modules/ims_usrloc_pcscf/doc/ims_usrloc_pcscf_admin.xml
Modified: src/modules/ims_usrloc_pcscf/ims_usrloc_pcscf_mod.c
Modified: src/modules/ims_usrloc_pcscf/ims_usrloc_pcscf_mod.h
Modified: src/modules/ims_usrloc_pcscf/pcontact.c
Modified: src/modules/ims_usrloc_pcscf/udomain.c
Modified: src/modules/ims_usrloc_pcscf/udomain.h
Modified: src/modules/ims_usrloc_pcscf/ul_callback.c
Modified: src/modules/ims_usrloc_pcscf/ul_callback.h
Modified: src/modules/ims_usrloc_pcscf/ul_rpc.c
Modified: src/modules/ims_usrloc_pcscf/usrloc.c
Modified: src/modules/ims_usrloc_pcscf/usrloc.h
Modified: src/modules/ims_usrloc_pcscf/usrloc_db.c
Modified: src/modules/ims_usrloc_pcscf/usrloc_db.h

---

Diff:  https://github.com/kamailio/kamailio/commit/7a1f2be30ea68c4ee7ab71a32c88e31d136e7b71.diff
Patch: https://github.com/kamailio/kamailio/commit/7a1f2be30ea68c4ee7ab71a32c88e31d136e7b71.patch