- avoid parallel calls to gencookie from generating the same cookie for rtpengine

#### 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 --> - [ ] Commit message has the format required by CONTRIBUTING guide - [ ] Commits are split per component (core, individual modules, libs, utils, ...) - [ ] 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: <!-- Go over all points below, and after creating the PR, tick the checkboxes that apply --> - [ ] PR should be backported to stable branches - [ ] Tested changes locally - [ ] Related to issue #XXXX (replace XXXX with an open issue number)

#### Description <!-- Describe your changes in detail -->

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

https://github.com/kamailio/kamailio/pull/4139

-- Commit Summary --

* rtpengine: fix race condn assigning same ip:port due to gencookie in parallel forks

-- File Changes --

M src/modules/rtpengine/rtpengine.c (3)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/4139.patch https://github.com/kamailio/kamailio/pull/4139.diff