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Abtin Keshavarzian
f90d50b220
This commit introduces the `Dhcp6PdClient` class, which implements DHCPv6 Prefix Delegation (PD) client functionality. It integrates with `BorderRouter::RoutingManager` and its `PdPrefixManager` sub-component. The CMake `OT_BORDER_ROUTING_DHCP6_PD_CLIENT` mapped to `OPENTHREAD_CONFIG_BORDER_ROUTING_DHCP6_PD_CLIENT_ENABLE` config enables this feature. Previously, the platform layer was expected to implement client functionality, acquiring and providing the delegated prefix(es) to the OT stack using `otPlatBorderRouter*` callbacks. This approach continues to be supported. The `Dhcp6PdClient` feature adds native support for this functionality in the OpenThread core. The `Dhcp6PdClient` implementation follows RFC 8415, focusing on prefix delegation and all required behaviors. The client follows the standard four-message Solicit/Advertise/Request/Reply exchange to obtain a delegated prefix, followed by a two-message Renew/Reply or Rebind/Reply exchange to extend the lifetime of the delegated prefix. When the prefix is no longer needed, a two-message Release/Reply exchange ends its lease. The current client implementation does not support the optional "Reconfigure Accept" mechanism. A set of `otPlatInfraIfDhcp6PdClient*` platform APIs are also introduced for use by the `Dhcp6PdClient`. These APIs are used to enable or disable listening for DHCPv6 messages and to handle sending and receiving them on the standard client and server UDP ports (546 and 547), effectively acting as a UDP socket. This commit also includes a comprehensive unit test covering various aspects of `Dhcp6PdClient`, including common behaviors and many specific edge cases.
Nexus test framework
Nexus is a test framework for OpenThread testing.
Design Goals
- Faster and more scalable network simulation: Enable faster and more efficient simulations of OpenThread networks involving a large number of nodes over extended durations.
- Enhanced control: Achieve greater control and scalability over simulated tests.
Features
- Includes the Nexus platform implementation that emulates platform behavior, allowing multiple nodes running the OpenThread core stack to be simulated and interact with each other within the same process.
- Unlike the simulation platform (under
examples/platforms/simulation), where nodes run in separate processes and interact via POSIX sockets, Nexus nodes are simulated within a single process. - Nexus tests can interact directly with the C++ or C OT core APIs, providing more control than the simulation platform's CLI-based interactions.
- The flow of time in Nexus tests is directly controlled by the test itself, allowing for quick time interval advancement.
How to build and run tests
To build Nexus test cases, the build.sh script can be used:
mkdir nexus_test
top_builddir=nexus_test ./tests/nexus/build.sh
Afterwards, each test can be run directly:
./nexus_test/tests/nexus/nexus_form_join