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#### Pre-Submission Checklist <!-- Go over all points below, and after creating the PR, tick all the checkboxes that apply --> <!-- All points should be verified, otherwise, read the CONTRIBUTING guidelines from above--> <!-- If you're unsure about any of these, don't hesitate to ask on sr-dev mailing list --> - [X] Commit message has the format required by CONTRIBUTING guide - [X] Commits are split per component (core, individual modules, libs, utils, ...) - [X] Each component has a single commit (if not, squash them into one commit) - [X] 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) - [X] New feature (non-breaking change which adds new functionality) - [ ] Breaking change (fix or feature that would change existing functionality)

#### Checklist: <!-- Go over all points below, and after creating the PR, tick the checkboxes that apply --> - [ ] PR should be backported to stable branches - [X] Tested changes locally - [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description <!-- Describe your changes in detail --> Implement reuse of IPSec tunnels when UEs are re-registering or de-registering, optimizing tunnel creations and key exchanges, and (hopefully) performance. This is a refactored version of PR #3029. I hope that all the issues @alexyosifov found have been fixed. You can view, comment on, or merge this pull request online at:

https://github.com/kamailio/kamailio/pull/3094

-- Commit Summary --

* ims_ipsec_pcscf: fix issues with UEs and ipsec tunnel

-- File Changes --

M src/modules/ims_ipsec_pcscf/cmd.c (151) M src/modules/ims_ipsec_pcscf/ims_ipsec_pcscf_mod.c (12) M src/modules/ims_ipsec_pcscf/ipsec.c (29) D src/modules/ims_ipsec_pcscf/port_gen.c (227) D src/modules/ims_ipsec_pcscf/port_gen.h (41) M src/modules/ims_ipsec_pcscf/sec_agree.c (33) M src/modules/ims_ipsec_pcscf/spi_gen.c (112) M src/modules/ims_ipsec_pcscf/spi_gen.h (6) M src/modules/ims_ipsec_pcscf/spi_list.c (62) M src/modules/ims_ipsec_pcscf/spi_list.h (12)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/3094.patch https://github.com/kamailio/kamailio/pull/3094.diff