Logical Link Control and Adaptation Layer Protocol, referred to as L2CAP, provides connection oriented and connectionless data services to upper layer protocols with protocol multiplexing capability and segmentation and reassembly operation. More...

Data Structures
struct	wiced_bt_l2cap_fcr_options_t
	Structure for Enhanced Retransmission Mode Options Refer to Volume 3, Part A, section 5.4 of Bluetooth Core specification for details. More...

struct	wiced_bt_l2cap_cfg_information_t
	Define a structure to hold the configuration parameters. More...

struct	wiced_bt_l2cap_ertm_information_t
	Structure that applications use to create or accept connections with enhanced retransmission mode. More...

struct	wiced_bt_l2cap_appl_information_t
	Define the structure that applications use to register with L2CAP. More...

struct	wiced_bt_l2cap_le_appl_information_t
	Define the structure that applications use to register with LE L2CAP. More...

struct	wiced_bt_l2cap_fixed_chnl_reg_t
	Fixed channel registration info (the callback addresses and channel config) More...

Modules
	BR/EDR
	API's used for BR/EDR L2CAP.

	Common
	Commonly used API's for both BE/EDR and LE L2CAP.

	LE
	API's used for LE L2CAP.

Macros
#define	L2CAP_ECRB_MAX_CHANNELS_PER_CMD 5
	ECRB Max Channels per Command.

#define	L2CAP_ECRB_MIN_MTU 64
	ECRB Min MTU.

#define	L2CAP_ECRB_MIN_MPS 64
	ECRB Min MPS.

#define	L2CAP_MINIMUM_OFFSET 13
	Minimum offset that L2CAP needs in a buffer. More...

#define	L2CAP_BLE_CONN_MIN_OFFSET 9
	HCI type(1), len(2), handle(2), L2CAP len(2) and CID(2)

#define	L2CAP_DEFAULT_BLE_CB_POOL_ID 0xFF
	Use the default HCI ACL buffer pool.

#define	L2CAP_BLE_COC_SDU_OFFSET 4
	to provide upper layer some minimal offset possibly required to process incoming packets

#define	L2CAP_BROADCAST_MIN_OFFSET 11
	Minimum offset for broadcast needs another two bytes for the PSM.

Typedefs
typedef uint16_t	wiced_bt_l2cap_ch_cfg_bits_t
	Channel configuration fields in bit map. More...

typedef uint8_t	wiced_bt_l2cap_chnl_priority_t
	Values for priority parameter to wiced_bt_l2cap_set_tx_priority(). More...

typedef void(	wiced_bt_l2cap_connected_cback_t )(wiced_bt_device_address_t bd_addr, uint16_t local_cid, uint16_t peer_mtu)
	Connection established callback prototype. More...

typedef void(	wiced_bt_l2cap_disconnect_indication_cback_t )(uint16_t local_cid, uint16_t reason, wiced_bool_t ack)
	Disconnect indication callback prototype. More...

typedef void(	wiced_bt_l2cap_disconnect_confirm_cback_t )(uint16_t local_cid, uint16_t result)
	Disconnect confirm callback prototype. More...

typedef void(	wiced_bt_l2cap_data_indication_cback_t )(uint16_t local_cid, tDRB *p_drb)
	Data received indication callback prototype. More...

typedef void(	wiced_bt_l2cap_tx_complete_cback_t )(uint16_t local_cid, void *p_data)
	Transmit complete callback protype. More...

typedef void(	wiced_bt_l2cap_fixed_chnl_cback_t )(wiced_bt_device_address_t bd_addr, wiced_bool_t connected, uint16_t reason, wiced_bt_transport_t transport)
	Fixed channel connected and disconnected. More...

typedef void(	wiced_bt_l2cap_fixed_data_cback_t )(wiced_bt_device_address_t bd_addr, uint8_t *p_data, uint16_t data_len)
	Signalling data received. More...

typedef void(	wiced_bt_l2cap_le_connect_indication_cback_t )(wiced_bt_device_address_t bd_addr, uint16_t local_cid, uint16_t psm, uint8_t id, uint16_t mtu_peer)
	LE Connection indication callback prototype. More...

typedef void(	wiced_bt_l2cap_drb_release_cb )(tDRB *p_drb)
	User DRB may be released callback prototype. More...

typedef void(	wiced_bt_l2cap_le_connect_confirm_cback_t )(uint16_t local_cid, uint16_t result, uint16_t mtu_peer)
	LE Connection confirmation callback prototype. More...

L2CAP connection result codes
L2CAP connection result codes.
#define	L2CAP_CONN_OK 0
	Connection OK.

#define	L2CAP_CONN_PENDING 1
	Connection Pending.

#define	L2CAP_CONN_NO_PSM 2
	Connection NO PSM.

#define	L2CAP_CONN_SECURITY_BLOCK 3
	Connection Security Block.

#define	L2CAP_CONN_NO_RESOURCES 4
	Connection NO Resource.

#define	L2CAP_CONN_BAD_CTLR_ID 5
	Bad Controller ID. More...

#define	L2CAP_BLE_CONN_BAD_AUTHENT 5
	LE Connection Bad Authentication.

#define	L2CAP_BLE_CONN_BAD_AUTHORIZ 6
	LE Connection Bad Autherization.

#define	L2CAP_BLE_CONN_BAD_KEY_SIZE 7
	LE Connection Bad key size.

#define	L2CAP_BLE_CONN_BAD_ENCRYPT 8
	LE Connection Bad Encryption.

L2CAP ECRB Result Code
L2CAP ECRB Result Code
#define	L2CAP_ECRB_ALL_CONNS_SUCCESSFUL 0x0000
	All Connections Successful.

#define	L2CAP_ECRB_ALL_CONNS_REFUSED 0x0002
	All Connections Refused.

#define	L2CAP_ECRB_SOME_CONNS_REFUSED 0x0004
	Some Connections Refused.

#define	L2CAP_ECRB_INSUFF_AUTHENTICATION 0x0005
	Insufficient Authentication.

#define	L2CAP_ECRB_INSUFF_AUTHORIZATION 0x0006
	Insufficient Autherization.

#define	L2CAP_ECRB_INSUFF_KEY_SIZE 0x0007
	Insufficient Key size.

#define	L2CAP_ECRB_INSUFF_ENCRYPTION 0x0008
	Insufficient Encryption.

#define	L2CAP_ECRB_INVALID_SOURCE_CID 0x0009
	Invalid Source CID.

#define	L2CAP_ECRB_SOURCE_CID_IN_USE 0x000A
	Source CID in Used.

#define	L2CAP_ECRB_UNACCEPTABLE_PARAMS 0x000B
	Unacceptable Params.

#define	L2CAP_ECRB_INVALID_PARAMS 0x000C
	Invalid Params.

#define	L2CAP_ECRB_RECONFIG_SUCCESSFUL 0x0000
	Reconfiguration Successful.

#define	L2CAP_ECRB_RECONFIG_FAIL_BAD_MTU 0x0001
	Reconfiguration fail : Bad MTU.

#define	L2CAP_ECRB_RECONFIG_FAIL_BAD_MPS 0x0002
	Reconfiguration fail : Bad MPS.

#define	L2CAP_ECRB_RECONFIG_FAIL_BAD_DCID 0x0003
	Reconfiguration fail : Bad DCID.

#define	L2CAP_ECRB_RECONFIG_FAIL_OTHER 0x0004
	Reconfiguration fail : Other Reason.

#define	L2CAP_ECRB_NOT_SUPPORTED_BY_PEER 0xF000
	Not Supported by Peer.

L2CAP ping result
Ping result codes.
#define	L2CAP_PING_RESULT_OK 0
	Ping reply received OK.

#define	L2CAP_PING_RESULT_NO_LINK 1
	Link could not be setup.

#define	L2CAP_PING_RESULT_NO_RESPONSE 2
	Remote L2CAP did not reply.

L2CAP data write result
Result codes for wiced_bt_l2cap_data_write()
#define	L2CAP_DATAWRITE_FAILED FALSE
	If data not accepted and error.

#define	L2CAP_DATAWRITE_SUCCESS TRUE
	If data accepted.

#define	L2CAP_DATAWRITE_CONGESTED 2
	if data accepted and the channel is congested

L2CAP data write flags
Flushable/Non Flushable flags parameter used in a call wiced_bt_l2cap_data_write()
#define	L2CAP_FLUSHABLE_MASK 0x0001
	L2CAP Flushable mask.

#define	L2CAP_NON_FLUSHABLE_PACKET 0x0000
	Non Flushable flag.

#define	L2CAP_FLUSHABLE_PACKET 0x0001
	Flushable flag.

L2CAP PSM
Validity check for PSM. PSM values must be odd. Also, all PSM values must be assigned such that the least significant bit of the most sigificant octet equals zero.
#define	L2C_INVALID_PSM(psm) (((psm) & 0x0101) != 0x0001)
	Returns true on invalid PSM.

#define	L2C_IS_VALID_PSM(psm) (((psm) & 0x0101) == 0x0001)
	Returns true on valid PSM.

L2CAP channel configuration
L2CAP channel configured field bitmap. Used for wiced_bt_l2cap_ch_cfg_bits_t
#define	L2CAP_CH_CFG_MASK_MTU 0x0001
	MTU channel configuration bit mask.

#define	L2CAP_CH_CFG_MASK_QOS 0x0002
	QOS channel configuration bit mask.

#define	L2CAP_CH_CFG_MASK_FLUSH_TO 0x0004
	Flush to channel configuration bit mask.

#define	L2CAP_CH_CFG_MASK_FCR 0x0008
	FCR channel configuration bit mask.

#define	L2CAP_CH_CFG_MASK_FCS 0x0010
	FCS channel configuration bit mask.

#define	L2CAP_CH_CFG_MASK_EXT_FLOW_SPEC 0x0020
	Extended flow specification channel configuration bit mask.

L2CAP FCR Mode
L2CAP FCR mode configuring options and allowed modes bit mask. From below, first 3 used as a field wiced_bt_l2cap_fcr_options_t::mode and reamining used as a bit mask field wiced_bt_l2cap_ertm_information_t::allowed_modes
#define	L2CAP_FCR_BASIC_MODE 0x00
	Basic mode (no FCR)

#define	L2CAP_FCR_ERTM_MODE 0x03
	ERTM mode.

#define	L2CAP_FCR_STREAM_MODE 0x04
	Streaming mode.

#define	L2CAP_FCR_CHAN_OPT_BASIC (1 << L2CAP_FCR_BASIC_MODE)
	Basic mode (no FCR) bit mask.

#define	L2CAP_FCR_CHAN_OPT_ERTM (1 << L2CAP_FCR_ERTM_MODE)
	ERTM mode bit mask.

#define	L2CAP_FCR_CHAN_OPT_STREAM (1 << L2CAP_FCR_STREAM_MODE)
	Streaming mode bit mask.

#define	L2CAP_FCR_CHAN_OPT_ALL_MASK (L2CAP_FCR_CHAN_OPT_BASIC \| L2CAP_FCR_CHAN_OPT_ERTM \| L2CAP_FCR_CHAN_OPT_STREAM)
	Mask for all modes Basic, ERTM and Streaming.

L2CAP flush channels
L2CAP flush channel and num_to_flush parameter used in a call wiced_bt_l2cap_flush_channel()
#define	L2CAP_FLUSH_CHANNELS_ALL 0xffff
	To flush all queued buffers.

#define	L2CAP_FLUSH_CHANNELS_GET 0x0000
	To get queued buffers to flush.

L2CAP role
L2CAP role and new_role parameter used in a call wiced_bt_l2cap_set_desire_role() Note L2CAP_ROLE_SCATTERNET_ALLOWED bit is used to prevent l2CAP to Automatically perform role switch (for both Incoming and outgoing) ACL connections.
#define	L2CAP_ROLE_PERIPHERAL HCI_ROLE_PERIPHERAL
	L2CAP Peripheral role.

#define	L2CAP_ROLE_CENTRAL HCI_ROLE_CENTRAL
	L2CAP Central role.

#define	L2CAP_ROLE_ALLOW_SWITCH 0x80
	set this bit to allow switch at create conn

#define	L2CAP_ROLE_DISALLOW_SWITCH 0x40
	set this bit to disallow switch at create conn

#define	L2CAP_ROLE_CHECK_SWITCH 0xC0
	To check the switch to allow or disallow.

#define	L2CAP_ROLE_SCATTERNET_ALLOWED 0x20
	set this bit to allow scatternet

L2CAP ACL Priority Value
Values for priority parameter to wiced_bt_l2cap_set_acl_priority() and wiced_bt_l2cap_set_acl_priority_ext().
#define	L2CAP_PRIORITY_NORMAL 0
	Set ACL priority as normal.

#define	L2CAP_PRIORITY_HIGH 1
	Set ACL priority as high.

L2CAP ACL Priority Direction
Values for direction parameter to wiced_bt_l2cap_set_acl_priority_ext()
#define	L2CAP_DIRECTION_IGNORE 0
	Set ACL priority direction as ignore.

#define	L2CAP_DIRECTION_DATA_SOURCE 1
	Set ACL priority direction as source.

#define	L2CAP_DIRECTION_DATA_SINK 2
	Set ACL priority direction as sink.

L2CAP transmission channel priority
L2CAP channel transmission priority. Used for wiced_bt_l2cap_chnl_priority_t
#define	L2CAP_CHNL_PRIORITY_HIGH 0
	Transmission priority as high for a channel (FCR Mode)

#define	L2CAP_CHNL_PRIORITY_MEDIUM 1
	Transmission priority as medium for a channel (FCR Mode)

#define	L2CAP_CHNL_PRIORITY_LOW 2
	Transmission priority as low for a channel (FCR Mode)

L2CAP LE PSM
Validity check for LE_PSM. Fixed LE_PSMs are in the range 0x0001 - 0x007F. Dynamic LE_PSM are in the range 0x0080 - 0x00FF. The values 0x0000 and 0x0100 - 0xFFFF are reserved.
#define	MINIMIUM_DYNAMIC_LE_PSM 0x0080
	First application dynamic PSM allowed.

#define	MAXIMUM_LE_PSM 0x00FF
	LE PSM range limit.

#define	L2C_BLE_INVALID_PSM(le_psm) (!(le_psm) \|\| (le_psm) > MAXIMUM_LE_PSM)
	Returns true on invalid LE PSM.

#define	L2C_BLE_IS_VALID_PSM(le_psm) (((le_psm) != 0) && ((le_psm) <= MAXIMUM_LE_PSM))
	Returns true on valid LE PSM.

Detailed Description

Logical Link Control and Adaptation Layer Protocol, referred to as L2CAP, provides connection oriented and connectionless data services to upper layer protocols with protocol multiplexing capability and segmentation and reassembly operation.

Macro Definition Documentation

#define L2CAP_CONN_BAD_CTLR_ID 5

Bad Controller ID.

Note: AMP related

#define L2CAP_MINIMUM_OFFSET 13

Minimum offset that L2CAP needs in a buffer.

This is made up of HCI type(1), len(2), handle(2), L2CAP len(2), CID(2), control(2) and SDU length(2)

Typedef Documentation

uint16_t wiced_bt_l2cap_ch_cfg_bits_t

Channel configuration fields in bit map.

Refer L2CAP channel configuration

uint8_t wiced_bt_l2cap_chnl_priority_t

Values for priority parameter to wiced_bt_l2cap_set_tx_priority().

Refer L2CAP channel transmission priority

typedef void( wiced_bt_l2cap_connected_cback_t)(wiced_bt_device_address_t bd_addr, uint16_t local_cid, uint16_t peer_mtu)

Connection established callback prototype.

Parameters

bd_addr	: BD Address of remote
local_cid	: Local CID assigned to the connection
peer_mtu	: Peer MTU

Returns: void

typedef void( wiced_bt_l2cap_data_indication_cback_t)(uint16_t local_cid, tDRB *p_drb)

Data received indication callback prototype.

Parameters

local_cid	: Local CID
p_buff	: Pointer to the data
buf_len	: Length of the data

Returns: void

typedef void( wiced_bt_l2cap_disconnect_confirm_cback_t)(uint16_t local_cid, uint16_t result)

Disconnect confirm callback prototype.

Parameters

local_cid	: Local CID
result	: Result

Returns: void

typedef void( wiced_bt_l2cap_disconnect_indication_cback_t)(uint16_t local_cid, uint16_t reason, wiced_bool_t ack)

Disconnect indication callback prototype.

Parameters

local_cid	: Local CID
ack	: Boolean whether upper layer should ack this

Returns: void

typedef void( wiced_bt_l2cap_drb_release_cb)(tDRB *p_drb)

User DRB may be released callback prototype.

This function address is passed in when the user provides a DRB for an eRTM or LE-COC channel. It is called when the DRB can be released, i.e. at the end of the connection.

Parameters

p_drb : Address of the DRB that can be released

Returns: void

typedef void( wiced_bt_l2cap_fixed_chnl_cback_t)(wiced_bt_device_address_t bd_addr, wiced_bool_t connected, uint16_t reason, wiced_bt_transport_t transport)

Fixed channel connected and disconnected.

Parameters

bd_addr	: BD Address of remote
connected	: TRUE if channel is connected, FALSE if disconnected
reason	: Reason for connection failure
transport	: Bluetooth Transport (BR/EDR or LE)

Returns: void

typedef void( wiced_bt_l2cap_fixed_data_cback_t)(wiced_bt_device_address_t bd_addr, uint8_t *p_data, uint16_t data_len)

Signalling data received.

Parameters

bd_addr	: BD Address of remote
p_buff	: Pointer to data
data_len	: Data length

Returns: void

typedef void( wiced_bt_l2cap_le_connect_confirm_cback_t)(uint16_t local_cid, uint16_t result, uint16_t mtu_peer)

LE Connection confirmation callback prototype.

Parameters

local_cid	: Local CID
result	: Result - 0 = connected, non-zero means failure reason
mtu_peer	: MTU of the peer

Returns: void

typedef void( wiced_bt_l2cap_le_connect_indication_cback_t)(wiced_bt_device_address_t bd_addr, uint16_t local_cid, uint16_t psm, uint8_t id, uint16_t mtu_peer)

LE Connection indication callback prototype.

Parameters

bd_addr	: BD Address of remote
local_cid	: Local CID assigned to the connection
psm	: PSM that the remote wants to connect to
id	: Identifier that the remote sent
mtu_peer	: MTU of the peer

Returns: void

typedef void( wiced_bt_l2cap_tx_complete_cback_t)(uint16_t local_cid, void *p_data)

Transmit complete callback protype.

This callback is optional. If set, L2CAP will call it when packets are sent or flushed. If the count is 0xFFFF, it means all packets are sent for that CID (eRTM mode only).

Parameters

local_cid	: Local CID
p_buff	: Pointer to the data that was sent

Returns: void


			AIROC^™ BTSDK v4.9 - Documentation

Data Structures

Modules

Macros

Typedefs

L2CAP connection result codes

L2CAP ECRB Result Code

L2CAP ping result

L2CAP data write result

L2CAP data write flags

L2CAP PSM

L2CAP channel configuration

L2CAP FCR Mode

L2CAP flush channels

L2CAP role

L2CAP ACL Priority Value

L2CAP ACL Priority Direction

L2CAP transmission channel priority

L2CAP LE PSM

Detailed Description

Macro Definition Documentation

Typedef Documentation