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nimble/ll: Add initial Channel Sounding scheduling #1789

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@mkasenberg mkasenberg changed the title [wip] nimble/ll: Add initial Channel Sounding scheduling nimble/ll: Add initial Channel Sounding scheduling Jan 24, 2025
@mkasenberg mkasenberg marked this pull request as ready for review January 24, 2025 10:45
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Refactored to generate all channels and addresses before starting CS subevent transmission sequence.

A dedicated CS DRBG is used to coordinate the randomization of several
transaction types during a CS procedure.
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Just rebase

The BT specification provides sample data that can be used to test
the correctness of a CS DRBG implementation.
ble_cs.c contains initial implementation that caused warnings when
running command:
newt test @apache-mynewt-nimble/nimble
Blueooth 6.0. spec contains Optional_TX_SNR_Capability field as
a CS capability. Companion signal parameter was removed.
Initialize the CS state machine with the connection state machine.
Add lengths and opcodes of Channel Sounding LL CTRL PDUs.
Implement the LE CS Read Local Supported Capabilities command.
Enable basic CS capabilities in local controller.
Implements:
- LE CS Read Remote Supported Capabilities command,
- LE CS Write Cached Remote Supported Capabilities command.
The HCI_LE_CS_Set_Default_Settings command is used by a Host to set
default CS settings in the local Controller for the connection.
Implements:
- LE CS Read Remote FAE Table command
- LE CS Write Cached Remote FAE Table command
Implements:
- LE CS Create Config command
- LE CS Remove Config command
Implements LE CS Security Enable command.
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