Add new function to clear OpenSSL errors prior to any SSL_* call
Apply function where appropriate

Pre-Submission Checklist

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:

PR should be backported to stable branches
Tested changes locally
Related to issue #XXXX (replace XXXX with an open issue number)

Description

This PR proposes similar fixes like #3607.

OpenSSL docs suggest that the error stack must be empty for SSL_get_error() to work reliably.

Note: This has not been tested like previous PR and any feedback of course is appreciated.

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

https://github.com/kamailio/kamailio/pull/3612

Commit Summary

5f7077f cdp: Add and apply cdp_openssl_clear_errors function

File Changes

(4 files)

Patch Links:

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