This commit updates unit test modules to be defined under the `ot`
namespace. This aligns all the unit tests to follow the same
model, eliminating the need to use `ot::` prefix in unit test
code.
This commit moves the `instance` module to a newly added folder
`core/instance` (from `core/common`. Header file `extension.hpp`
and its example is also moved to the same folder.
This commit updates the `TrickleTimer` to allow `IntervalMax` and
`IntervalMin` to be changed while the timer is running. In particular,
when `IntervalMax` is changed to a value that is shorter than the
current interval being used by the timer, the timer will adapt the
new shorter interval and may fire immediately.
A unit test `test_trickle_timer` has been added to validate the
behavior of `TrickleTimer` in detail. All different scenarios where
`IntervalMax` or `IntervalMin` are changed are covered by the
unit test.
The new mechanism to change the trickle timer `IntervalMax` is
used to update the MLE Advertisement trickle timer. The `IntervalMax`
is determined based on the number of router neighbors of the device
with link quality 2 or better. If the device has fewer router neighbors,
it will use a shorter `IntervalMax`. As new links are established
with routers, the `IntervalMax` is recalculated and updated on the
Advertisement trickle timer.
This commit also adds a new test `test-024-mle-adv-imax-change.py` to
validate updates to the `IntervalMax` value based on the number of
router neighbors.
Co-authored-by: David Smith <david.smith@mmbnetworks.com>
Abtin Keshavarzian