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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 - [x] 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 --> - [x] PR should be backported to stable branches - [x] Tested changes locally - [x] Related to issue #4212

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

Probing a host correctly needs the tm module to be loaded. This PR adds a check for when adding a target in dispatcher with probing enabled to verify whether tm is loaded. If it's not, it emmits a warning and disable the probing to the target.

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

https://github.com/kamailio/kamailio/pull/4223

-- Commit Summary --

* dispatcher: Check if tm is enabled before probing

-- File Changes --

M src/modules/dispatcher/dispatch.c (6)

-- Patch Links --

https://github.com/kamailio/kamailio/pull/4223.patch https://github.com/kamailio/kamailio/pull/4223.diff