Logical Link Control and Adaptation Protocol (L2CAP)

Definitions and prototypes for the L2CAP interface. More...

Modules
	Message Sequence Charts
	Defines

Data Structures
struct	ble_l2cap_header_t
	Packet header format for L2CAP transmission. More...
struct	ble_l2cap_evt_rx_t
	L2CAP Received packet event report. More...
struct	ble_l2cap_evt_t
	L2CAP event callback event structure. More...

Enumerations
enum	BLE_L2CAP_SVCS {   SD_BLE_L2CAP_CID_REGISTER = 0xB0,   SD_BLE_L2CAP_CID_UNREGISTER,   SD_BLE_L2CAP_TX }
	L2CAP API SVC numbers. More...
enum	BLE_L2CAP_EVTS { BLE_L2CAP_EVT_RX = 0x70 }
	L2CAP Event IDs. More...

Functions
uint32_t	sd_ble_l2cap_cid_register (uint16_t cid)
	Register a CID with L2CAP. More...
uint32_t	sd_ble_l2cap_cid_unregister (uint16_t cid)
	Unregister a CID with L2CAP. More...
uint32_t	sd_ble_l2cap_tx (uint16_t conn_handle, ble_l2cap_header_t const *const p_header, uint8_t const *const p_data)
	Transmit an L2CAP packet. More...

Detailed Description

Definitions and prototypes for the L2CAP interface.

Enumeration Type Documentation

enum BLE_L2CAP_EVTS

L2CAP Event IDs.

Enumerator
BLE_L2CAP_EVT_RX	L2CAP packet received.

enum BLE_L2CAP_SVCS

L2CAP API SVC numbers.

Enumerator
SD_BLE_L2CAP_CID_REGISTER	Register a CID.
SD_BLE_L2CAP_CID_UNREGISTER	Unregister a CID.
SD_BLE_L2CAP_TX	Transmit a packet.

Function Documentation

uint32_t sd_ble_l2cap_cid_register

(

uint16_t

cid

)

Register a CID with L2CAP.

This registers a higher protocol layer with the L2CAP multiplexer, and is requried prior to all operations on the CID.

Parameters

[in]

cid

L2CAP CID.

Returns

NRF_SUCCESS Successfully registered a CID with the L2CAP layer.

NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, CID must be above BLE_L2CAP_CID_DYN_BASE.

BLE_ERROR_L2CAP_CID_IN_USE L2CAP CID already in use.

NRF_ERROR_NO_MEM Not enough memory to complete operation.

uint32_t sd_ble_l2cap_cid_unregister

(

uint16_t

cid

)

Unregister a CID with L2CAP.

This unregisters a previously registerd higher protocol layer with the L2CAP multiplexer.

Parameters

[in]

cid

L2CAP CID.

Returns

NRF_SUCCESS Successfully unregistered the CID.

NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied.

NRF_ERROR_NOT_FOUND CID not previously registered.

uint32_t sd_ble_l2cap_tx	(	uint16_t	conn_handle,
		ble_l2cap_header_t const *const	p_header,
		uint8_t const *const	p_data
	)

Transmit an L2CAP packet.

Note

It is important to note that a call to this function will consume an application buffer, and will therefore generate a BLE_EVT_TX_COMPLETE event when the packet has been transmitted. Please see the documentation of sd_ble_tx_buffer_count_get for more details.

Parameters

[in]	conn_handle	Connection Handle.
[in]	p_header	Pointer to a packet header containing length and CID.
[in]	p_data	Pointer to the data to be transmitted.

Returns

NRF_SUCCESS Successfully queued an L2CAP packet for transmission.

NRF_ERROR_INVALID_ADDR Invalid pointer supplied.

NRF_ERROR_INVALID_PARAM Invalid parameter(s) supplied, CIDs must be registered beforehand with sd_ble_l2cap_cid_register.

NRF_ERROR_NOT_FOUND CID not found.

NRF_ERROR_NO_MEM Not enough memory to complete operation.

BLE_ERROR_NO_TX_BUFFERS Not enough application buffers available.

NRF_ERROR_DATA_SIZE Invalid data size(s) supplied, see BLE_L2CAP_MTU_DEF.