Contributing to nixnet

Contributions to nixnet are welcome from all!

nixnet is managed via git, with the canonical upstream repository hosted on GitHub.

nixnet follows a pull-request model for development. If you wish to contribute, you will need to create a GitHub account, fork this project, push a branch with your changes to your project, and then submit a pull request.

See GitHub’s official documentation for more details.

Getting Started

To contribute to this project, it is recommended that you follow these steps:

  1. Fork the repository on GitHub.
  2. Run the unit tests on your system (see Testing section). At this point, if any tests fail, do not begin development. Try to investigate these failures. If you’re unable to do so, report an issue through our GitHub issues page.
  3. Write new tests that demonstrate your bug or feature. Ensure that these new tests fail.
  4. Make your change.
  5. Run all the unit tests again (which include the tests you just added), and confirm that they all pass.
  6. Send a GitHub Pull Request to the main repository’s master branch. GitHub Pull Requests are the expected method of code collaboration on this project.


In order to be able to run the nixnet unit tests, your setup should meet the following minimum requirements:

  • Setup has a machine with NI-XNET or the NI-XNET Runtime installed.
  • Machine has a supported version of CPython or PyPy installed.
  • TODO Document required hardware and system setup.

nixnet relies on tox and pytest for testing

$ pip install tox

To run the tests:

$ # Unit tests:
$ tox
$ # Integration tests:
$ tox -c tox-integration.ini -- --can-in-interface CAN1 --can-out-interface CAN2 --lin-in-interface LIN1 --lin-out-interface LIN2
$ # Integration tests (no LIN board):
$ tox -c tox-integration.ini -- --can-in-interface CAN1 --can-out-interface CAN2

Examples for debugging failures:

$ # Only run python3 unit tests
$ tox -e py3-test
$ # Further filter those tests to all starting with test_frames
$ tox -e py3-test -- -k test_frames
$ # Drop into PDB on first failure and quit when done
$ tox -e py3-test -- -x --pdb

Developer Certificate of Origin (DCO)

Developer’s Certificate of Origin 1.1

By making a contribution to this project, I certify that:

  1. The contribution was created in whole or in part by me and I have the right to submit it under the open source license indicated in the file; or
  2. The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right under that license to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license), as indicated in the file; or
  3. The contribution was provided directly to me by some other person who certified (a), (b) or (c) and I have not modified it.
  4. I understand and agree that this project and the contribution are public and that a record of the contribution (including all personal information I submit with it, including my sign-off) is maintained indefinitely and may be redistributed consistent with this project or the open source license(s) involved.

(taken from

See LICENSE for details about how nixnet is licensed.