TLS_WOLFSSL module
Admin Guide
Section titled “Admin Guide”Overview
Section titled “Overview”This module implements TLS operations using the wolfSSL libarary. It provides the primitives required by the tls_mgm module in order to expose a higher-level API used by TLS-based protocol modules like proto_tls or proto_wss.
The wolfSSL library is statically-linked and bundled with this module so no installation or external dependency is required.
Dependencies
Section titled “Dependencies”Compilation
Section titled “Compilation”The following packages must be installed before compiling this module:
- autoconf.
- automake.
- libtool.
OpenSIPS Modules
Section titled “OpenSIPS Modules”The following modules must be loaded before this module:
- None.
External Libraries or Applications
Section titled “External Libraries or Applications”The following libraries or applications must be installed before running OpenSIPS with this module loaded:
- None.
Exported Parameters
Section titled “Exported Parameters”All these parameters can be used from the opensips.cfg file, to configure the behavior of OpenSIPS-TLS.
try_use_ktls (integer)
Section titled “try_use_ktls (integer)”Try to use KTLS for RX and TX ( dependent on Kernel support and loaded modules https://docs.kernel.org/networking/tls-offload.htm ) If kernel support is not found, or if the cypher attempted to be used is not supported ( only AES-GCM for now ), then SSL operations will continue to be done in user-space. IF NIC supports SSL offloading, that can also be enabled without any changes needed to the module https://docs.nvidia.com/doca/sdk/ktls-offloads/index.html
Default value is 0.
...modparam("tls_wolfssl", "try_use_ktls", 1)...Frequently Asked Questions
Section titled “Frequently Asked Questions”Q: Why do I get the following error when compiling the module?
If you obtained the OpenSIPS sources by cloning the repository from Github, without using the —recursive option for the git clone command, you did not properly fetch the wolfSSL library code, which is included as a git submodule pointing to the official wolfSSL repository.
In order to fetch the wolfSSL library code you can run:
git submodule update --initContributors
Section titled “Contributors”By Commit Statistics
Section titled “By Commit Statistics”Top contributors by DevScore(1), authored commits(2) and lines added/removed(3)
| # | Name | DevScore | Commits | Lines++ | Lines— |
|---|---|---|---|---|---|
| 1. | Vlad Patrascu (@rvlad-patrascu) | 51 | 24 | 2847 | 130 |
| 2. | Razvan Crainea (@razvancrainea) | 29 | 20 | 383 | 276 |
| 3. | Stefan Darius | 8 | 5 | 123 | 21 |
| 4. | Vlad Paiu (@vladpaiu) | 6 | 1 | 394 | 3 |
| 5. | Maksym Sobolyev (@sobomax) | 4 | 2 | 2 | 2 |
| 6. | Ross Henderson | 3 | 1 | 9 | 6 |
| 7. | James Stanley | 3 | 1 | 6 | 1 |
| 8. | Bogdan-Andrei Iancu (@bogdan-iancu) | 3 | 1 | 3 | 3 |
| 9. | Liviu Chircu (@liviuchircu) | 3 | 1 | 2 | 2 |
| 10. | Bence Szigeti | 3 | 1 | 1 | 1 |
All remaining contributors: Alexey Vasilyev (@vasilevalex), vladpaiu.
(1) DevScore = author_commits + author_lines_added / (project_lines_added / project_commits) + author_lines_deleted / (project_lines_deleted / project_commits)
(2) including any documentation-related commits, excluding merge commits
(3) ignoring whitespace edits, renamed files and auto-generated files
By Commit Activity
Section titled “By Commit Activity”| # | Name | Commit Activity |
|---|---|---|
| 1. | Stefan Darius | Jun 2026 - Jul 2026 |
| 2. | Razvan Crainea (@razvancrainea) | Aug 2023 - Jun 2026 |
| 3. | Ross Henderson | Feb 2026 - Feb 2026 |
| 4. | Vlad Paiu (@vladpaiu) | Dec 2025 - Dec 2025 |
| 5. | vladpaiu | Jun 2025 - Jun 2025 |
| 6. | James Stanley | Feb 2024 - Feb 2024 |
| 7. | Liviu Chircu (@liviuchircu) | Oct 2023 - Oct 2023 |
| 8. | Bence Szigeti | Oct 2023 - Oct 2023 |
| 9. | Bogdan-Andrei Iancu (@bogdan-iancu) | May 2023 - May 2023 |
| 10. | Vlad Patrascu (@rvlad-patrascu) | May 2021 - Mar 2023 |
All remaining contributors: Maksym Sobolyev (@sobomax), Alexey Vasilyev (@vasilevalex).
(1) including any documentation-related commits, excluding merge commits
Documentation
Section titled “Documentation”Contributors
Section titled “Contributors”Last edited by: Razvan Crainea (@razvancrainea), Vlad Paiu (@vladpaiu), Vlad Patrascu (@rvlad-patrascu).
License
Section titled “License”All documentation files (i.e. .md extension) are licensed under the Creative Common License 4.0