This commit changes how the objects in OpenThread access each other.
It adds a template `Get<Type>()` method in `InstanceLocator`. This
method returns a reference to a given `Type` object belonging to the
OpenThread instance (e.g. `Get<MeshForwarder>()` returns a reference
to `MeshForwarder` object on the OpenThread instance). The
`InstanceLocator` is used as base class of all OpenThread classes so
every class can easily access any other object. This commit also
changes how the main instance is retrieved in `InstanceLocator` for
the single-instance case. The method `GetInstance()` directly uses the
raw buffer `gInstanceRaw`. This change helps make the `GetInstance()`
and in turn all `Get<Type>()` methods in-line. This commit also
removes the existing getters across all classes to use the new
`Get<Type>()` model.
This commit adds a new method `Child::GetMeshLocalIp6Address()`
to get the mesh-local IPv6 address registered by a child. The
unit test `test_child` is also updated to verify the new method.
This commit changes how a mesh-local IPv6 address is stored in
`Child` class. Instead of storing the entire IPv6 addresses (16
bytes), only the Interface Identifier (8 bytes) is saved. The full
address is derived (when needed) using the mesh-local prefix from
`Mle`. This reduces the memory required for storing registered IPv6
addresses in the child table.
This commit also updates the unit test `test_child` to use mesh-local
IPv6 address as part of the test and verify the behavior of new
implementation.
This commit updates/enhances the `Child` class methods related to
managing of the list of IPv6 addresses associated with a child. The
new model provides APIs to add or remove an IPv6 address, check if the
list contains an address, and a method to iterate through all IPv6
addresses of a child. The `mle_router` and `address_resolver` and NCP
implementations are updated to use the new APIs.
This commit also adds a unit test `test_child` to verify the newly
added methods.
Abtin Keshavarzian