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Jonathan Hui
3390085720
This commit introduces a maximum recursion depth limit for 6LoWPAN decompression to prevent potential stack exhaustion from maliciously crafted frames with deep IPv6-in-IPv6 encapsulation. - Added a private constant kMaxRecursionDepth in the Lowpan class to define the maximum allowed recursion depth. - Updated Lowpan::Decompress() to track and validate the current recursion depth, returning kErrorParse if the limit is exceeded. - Added a new unit test TestLowpanDecompressRecursion in tests/unit/test_lowpan.cpp to verify the recursion limit and ensure it correctly handles both excessive and legitimate encapsulation levels.
OpenThread Unit Tests
This page describes how to build and run OpenThread unit tests. It will be helpful for developers to debug failed unit test cases if they got one in CI or to add some new test cases.
Build Simulation
The unit tests cannot be built solely without building the whole project. So first build OpenThread on the simulation platform, which will also build all unit tests:
# Go to the root directory of OpenThread
$ script/cmake-build simulation
List all tests
To see what tests are available in OpenThread:
# Make sure you are at the simulation build directory (build/simulation)
$ ctest -N
Run the Unit Tests
To run all the unit tests:
# Make sure you are at the simulation build directory (build/simulation)
$ ctest
To run a specific unit test, for example, ot-test-spinel:
# Make sure you are at the simulation build directory (build/simulation)
$ ctest -R ot-test-spinel
Update a Test Case
If you are developing a unit test case and have made some changes in the test source file, you will need rebuild the test before running it:
# Make sure you are at the simulation build directory (build/simulation)
$ ninja <test_name>
This will only build the test and take a short time.
If any changes or fixes were made to the OpenThread code, then you'll need to rebuild the entire project:
# Make sure you are at the simulation build directory (build/simulation)
$ ninja
This will build the updated OpenThread code as well as the test cases.