Change in ims_isc/checker.c and ims_isc/checker.h:
add to isc_match two new flags include_register_request
and include_register_response in addition to service_info
Both info are retrieved from HSS during SAR/SAA
Change in ims_isc/third_party_reg.c/.h:
Add REGISTER Request or REGISTER Response or Service Info
to the body of the REGISTER message that is sent to the
AS, if it is requested by content of HSS (SAR/SAA)
Change in ims_registrar_scscf/userdata_parser.c and
ims_usrloc_scscf/usrloc.h:
Parse the additional flags, when they are received from HSS
and store in the subscription.

Conflicts:
src/modules/ims_isc/third_party_reg.c
src/modules/ims_rdn/userdata_parser.c

Pre-Submission Checklist

• Commit message has the format required by CONTRIBUTING guide
• Commits are split per component (core, individual modules, libs, utils, ...)
  ---> apologies, we did this commit long ago, when we did not know the rules of the project
  main changes are in ims_isc, two small changes in ims_registrar_scscf and ims_usrloc_scscf
• Each component has a single commit (if not, squash them into one commit)
• No commits to README files for modules (changes must be done to docbook files
  in doc/ subfolder, the README file is autogenerated)

Type Of Change

• Small bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds new functionality)
• Breaking change (fix or feature that would change existing functionality)

Checklist:

• PR should be backported to stable branches
• Tested changes locally based on a local branch derived from 5.1.0
• Related to issue #XXXX (replace XXXX with an open issue number)

Description

The feature is a small add-on to third party registration in S-CSCF
The feature assumes two new flags in HSS database, where additional to the "Service Info XML" an "insertRegisterRequest" flag or an "insertRegisterRepsonse" flag can be set. These flags are sent with the SAR/SAA exchange to the S-CSCF, where the new feature does a prioritization:
If Service Info present -> add service info to body of 3rd Party REGISTER Request
else if insertRegisterRequest -> add original REGISTER request to body of 3rd Party REGISTER request
else if insertRegisterResponse -> add original REGISTER response to body of 3rd Party REGISTER request
else -> add no body to 3rd Party REGISTER request.
Multipart Body is not supported.
More info about the insertRegisterRequest and insertRegisterResponse flags can be found in applicable 3GPP standards.

You can view, comment on, or merge this pull request online at:

  https://github.com/kamailio/kamailio/pull/1923

Commit Summary

• ims_isc: add-on for third-party registration

File Changes

• M src/modules/ims_isc/checker.c (2)
• M src/modules/ims_isc/checker.h (2)
• M src/modules/ims_isc/third_party_reg.c (106)
• M src/modules/ims_isc/third_party_reg.h (18)
• M src/modules/ims_registrar_scscf/userdata_parser.c (35)
• M src/modules/ims_usrloc_scscf/usrloc.h (2)

Patch Links:

• https://github.com/kamailio/kamailio/pull/1923.patch
• https://github.com/kamailio/kamailio/pull/1923.diff

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