ble_message.c File Reference

BLE protocol message framing: parse and build protocol/message_id headers and payloads; parse and extract Initiate Access, UWB control, Access Completed, and Reader Status Changed messages. More...

#include "ble_message.h"
#include "tlv.h"
#include <string.h>

Include dependency graph for ble_message.c:

Functions
int	woz_aliro_ble_build_message (uint8_t protocol, uint8_t message_id, const uint8_t *payload, size_t payload_length, uint8_t *output, size_t output_capacity, size_t *output_length)
	Build a BLE protocol message with a given payload.
static int	build_status (uint8_t message_id, uint8_t first, uint8_t reader_state, uint8_t output[8])
	Build a BLE Status message into an 8-byte array.
int	woz_aliro_ble_build_reader_status_changed (uint8_t operation_source, uint8_t reader_state, uint8_t output[8])
	Build an 8-byte unencrypted BLE Reader Status Changed notification with operation_source and reader_state; return 0 on success, -1 on error.

Detailed Description

BLE protocol message framing: parse and build protocol/message_id headers and payloads; parse and extract Initiate Access, UWB control, Access Completed, and Reader Status Changed messages.

Function Documentation

build_status()

static int build_status ( uint8_t  message_id, uint8_t  first, uint8_t  reader_state, uint8_t  output[8]  )

static

Build a BLE Status message into an 8-byte array.

Output is always 8 bytes when successful. Encodes protocol/message_id header, attribute ID 0 (State/Reader Information), and two state bytes (first and reader_state); output capacity must be >= 8 bytes.

woz_aliro_ble_build_message()

int woz_aliro_ble_build_message	(	uint8_t	protocol,
		uint8_t	message_id,
		const uint8_t *	payload,
		size_t	payload_length,
		uint8_t *	output,
		size_t	output_capacity,
		size_t *	output_length
	)

Build a BLE protocol message with a given payload.

Output is header (4 bytes: protocol, message_id, payload length as big-endian uint16) followed by the payload. Caller must provide a buffer large enough for header + payload; protocol field must not set bits 7-6. Payload must be 1–65535 bytes.