//! Zigbee Direct 1.1 (CSA 20-27688-041): secure session establishment over
//! the Authenticate characteristics, secured characteristic payloads,
//! authorization keys, the BLE advertisement extension, the GATT
//! service identifiers, the Commissioning Service payloads and ZDD
//! handler, and the Tunnel Service NPDU messages. The BLE transport
//! itself is the host's: this crate only produces and consumes
//! characteristic values. See `docs/architecture.md`.
extern crate alloc;