l2cap.c File Reference

#include "l2cap.h"
#include "hci.h"
#include "hci_dump.h"
#include "bluetooth_sdp.h"
#include "btstack_debug.h"
#include "btstack_event.h"
#include "btstack_memory.h"
#include <stdarg.h>
#include <string.h>
#include <stdio.h>

Data Structures
struct	l2cap_fixed_channel

Macros
#define	__BTSTACK_FILE__   "l2cap.c"
#define	L2CAP_FIXED_CHANNEL_TABLE_INDEX_ATTRIBUTE_PROTOCOL   0
#define	L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL   2
#define	L2CAP_FIXED_CHANNEL_TABLE_INDEX_SECURITY_MANAGER_PROTOCOL   1
#define	L2CAP_FIXED_CHANNEL_TABLE_SIZE   (L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL+1)
#define	L2CAP_LE_DATA_CHANNELS_AUTOMATIC_CREDITS_INCREMENT   5
#define	L2CAP_LE_DATA_CHANNELS_AUTOMATIC_CREDITS_WATERMARK   5
#define	L2CAP_SIGNALING_COMMAND_CODE_OFFSET   0
#define	L2CAP_SIGNALING_COMMAND_DATA_OFFSET   4
#define	L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET   2
#define	L2CAP_SIGNALING_COMMAND_SIGID_OFFSET   1
#define	NR_BUFFERED_ACL_PACKETS   3
#define	NR_PENDING_SIGNALING_RESPONSES   3

Typedefs
typedef struct l2cap_fixed_channel	l2cap_fixed_channel_t

Functions
static void	l2cap_acl_classic_handler (hci_con_handle_t handle, uint8_t *packet, uint16_t size)
static void	l2cap_acl_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)
static void	l2cap_acl_le_handler (hci_con_handle_t handle, uint8_t *packet, uint16_t size)
int	l2cap_can_send_fixed_channel_packet_now (hci_con_handle_t con_handle, uint16_t channel_id)
static void	l2cap_emit_can_send_now (btstack_packet_handler_t packet_handler, uint16_t channel)
static uint16_t	l2cap_fixed_channel_table_channel_id_for_index (int index)
static int	l2cap_fixed_channel_table_index_for_channel_id (uint16_t channel_id)
static int	l2cap_fixed_channel_table_index_is_le (int index)
uint8_t *	l2cap_get_outgoing_buffer (void)
	Get outgoing buffer and prepare data. More...
static void	l2cap_hci_event_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)
void	l2cap_init (void)
	Set up L2CAP and register L2CAP with HCI layer. More...
uint16_t	l2cap_max_le_mtu (void)
	Get max MTU for LE connections based on btstack configuration. More...
uint16_t	l2cap_max_mtu (void)
	Get max MTU for Classic connections based on btstack configuration. More...
static void	l2cap_notify_channel_can_send (void)
void	l2cap_register_fixed_channel (btstack_packet_handler_t the_packet_handler, uint16_t channel_id)
void	l2cap_register_packet_handler (void(*handler)(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size))
	Registers packet handler for LE Connection Parameter Update events. More...
static void	l2cap_register_signaling_response (hci_con_handle_t handle, uint8_t code, uint8_t sig_id, uint16_t cid, uint16_t data)
void	l2cap_release_packet_buffer (void)
	Release outgoing buffer (only needed if l2cap_send_prepared is not called) More...
void	l2cap_request_can_send_fix_channel_now_event (hci_con_handle_t con_handle, uint16_t channel_id)
int	l2cap_reserve_packet_buffer (void)
	Reserve outgoing buffer. More...
static void	l2cap_run (void)
int	l2cap_send_connectionless (hci_con_handle_t con_handle, uint16_t cid, uint8_t *data, uint16_t len)
int	l2cap_send_prepared_connectionless (hci_con_handle_t con_handle, uint16_t cid, uint16_t len)
static void	l2cap_setup_header (uint8_t *acl_buffer, hci_con_handle_t con_handle, uint8_t packet_boundary, uint16_t remote_cid, uint16_t len)

Variables
static l2cap_fixed_channel_t	fixed_channels [L2CAP_FIXED_CHANNEL_TABLE_SIZE]
static btstack_packet_callback_registration_t	hci_event_callback_registration
static l2cap_signaling_response_t	signaling_responses [NR_PENDING_SIGNALING_RESPONSES]
static int	signaling_responses_pending

#define __BTSTACK_FILE__   "l2cap.c"

#define L2CAP_FIXED_CHANNEL_TABLE_INDEX_ATTRIBUTE_PROTOCOL   0

Referenced by l2cap_acl_le_handler(), l2cap_fixed_channel_table_channel_id_for_index(), and l2cap_fixed_channel_table_index_for_channel_id().

#define L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL   2

Referenced by l2cap_acl_classic_handler(), l2cap_fixed_channel_table_channel_id_for_index(), and l2cap_fixed_channel_table_index_for_channel_id().

#define L2CAP_FIXED_CHANNEL_TABLE_INDEX_SECURITY_MANAGER_PROTOCOL   1

Referenced by l2cap_acl_le_handler(), l2cap_fixed_channel_table_channel_id_for_index(), and l2cap_fixed_channel_table_index_for_channel_id().

#define L2CAP_FIXED_CHANNEL_TABLE_SIZE   (L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL+1)

Referenced by l2cap_notify_channel_can_send().

#define L2CAP_LE_DATA_CHANNELS_AUTOMATIC_CREDITS_INCREMENT   5

Referenced by l2cap_acl_le_handler().

#define L2CAP_LE_DATA_CHANNELS_AUTOMATIC_CREDITS_WATERMARK   5

Referenced by l2cap_acl_le_handler().

#define L2CAP_SIGNALING_COMMAND_CODE_OFFSET   0

#define L2CAP_SIGNALING_COMMAND_DATA_OFFSET   4

Referenced by l2cap_acl_classic_handler().

#define L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET   2

Referenced by l2cap_acl_classic_handler().

#define L2CAP_SIGNALING_COMMAND_SIGID_OFFSET   1

#define NR_BUFFERED_ACL_PACKETS   3

#define NR_PENDING_SIGNALING_RESPONSES   3

Referenced by l2cap_register_signaling_response().

typedef struct l2cap_fixed_channel l2cap_fixed_channel_t

static void l2cap_acl_classic_handler ( hci_con_handle_t  handle, uint8_t *  packet, uint16_t  size  )

static

References callback, l2cap_fixed_channel::callback, COMPLETE_L2CAP_HEADER, L2CAP_CHANNEL_MODE_ENHANCED_RETRANSMISSION, L2CAP_CID_CONNECTIONLESS_CHANNEL, L2CAP_CID_SIGNALING, L2CAP_DATA_PACKET, L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL, L2CAP_SIGNALING_COMMAND_DATA_OFFSET, L2CAP_SIGNALING_COMMAND_LENGTH_OFFSET, L2CAP_SUPERVISORY_FUNCTION_REJ_REJECT, L2CAP_SUPERVISORY_FUNCTION_RNR_RECEIVER_NOT_READY, L2CAP_SUPERVISORY_FUNCTION_RR_RECEIVER_READY, L2CAP_SUPERVISORY_FUNCTION_SREJ_SELECTIVE_REJECT, l2cap_ertm_rx_packet_state_t::len, little_endian_read_16(), log_error, log_info, READ_L2CAP_CHANNEL_ID, l2cap_ertm_tx_packet_state_t::retransmission_requested, l2cap_ertm_rx_packet_state_t::sar, tx_state, UCD_DATA_PACKET, UNUSED, and l2cap_ertm_rx_packet_state_t::valid.

Referenced by l2cap_acl_handler().

static void l2cap_acl_handler ( uint8_t  packet_type, uint16_t  channel, uint8_t *  packet, uint16_t  size  )

static

References hci_connection_t::address_type, BD_ADDR_TYPE_CLASSIC, COMPLETE_L2CAP_HEADER, hci_connection_for_handle(), l2cap_acl_classic_handler(), l2cap_acl_le_handler(), l2cap_run(), READ_ACL_CONNECTION_HANDLE, and UNUSED.

Referenced by l2cap_init().

static void l2cap_acl_le_handler ( hci_con_handle_t  handle, uint8_t *  packet, uint16_t  size  )

static

References ATT_DATA_PACKET, l2cap_channel_t::automatic_credits, callback, l2cap_fixed_channel::callback, COMMAND_REJECT_LE, COMPLETE_L2CAP_HEADER, l2cap_channel_t::credits_incoming, L2CAP_CID_ATTRIBUTE_PROTOCOL, L2CAP_CID_SECURITY_MANAGER_PROTOCOL, L2CAP_CID_SIGNALING_LE, L2CAP_DATA_PACKET, L2CAP_FIXED_CHANNEL_TABLE_INDEX_ATTRIBUTE_PROTOCOL, L2CAP_FIXED_CHANNEL_TABLE_INDEX_SECURITY_MANAGER_PROTOCOL, L2CAP_LE_DATA_CHANNELS_AUTOMATIC_CREDITS_INCREMENT, L2CAP_LE_DATA_CHANNELS_AUTOMATIC_CREDITS_WATERMARK, l2cap_register_signaling_response(), L2CAP_REJ_CMD_UNKNOWN, L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST, little_endian_read_16(), l2cap_channel_t::local_mtu, log_error, log_info, l2cap_channel_t::new_credits_incoming, READ_L2CAP_CHANNEL_ID, l2cap_channel_t::receive_sdu_buffer, l2cap_channel_t::receive_sdu_len, l2cap_channel_t::receive_sdu_pos, SM_DATA_PACKET, l2cap_channel_t::state, and UNUSED.

Referenced by l2cap_acl_handler().

int l2cap_can_send_fixed_channel_packet_now	(	hci_con_handle_t	con_handle,
		uint16_t	channel_id
	)

References hci_can_send_acl_packet_now(), and UNUSED.

Referenced by att_dispatch_client_can_send_now(), att_dispatch_server_can_send_now(), and sm_run().

static void l2cap_emit_can_send_now ( btstack_packet_handler_t  packet_handler, uint16_t  channel  )

static

References hci_dump_packet(), HCI_EVENT_PACKET, L2CAP_EVENT_CAN_SEND_NOW, little_endian_store_16(), log_debug, and packet_handler.

Referenced by l2cap_notify_channel_can_send().

static uint16_t l2cap_fixed_channel_table_channel_id_for_index ( int  index )

static

References L2CAP_CID_ATTRIBUTE_PROTOCOL, L2CAP_CID_CONNECTIONLESS_CHANNEL, L2CAP_CID_SECURITY_MANAGER_PROTOCOL, L2CAP_FIXED_CHANNEL_TABLE_INDEX_ATTRIBUTE_PROTOCOL, L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL, and L2CAP_FIXED_CHANNEL_TABLE_INDEX_SECURITY_MANAGER_PROTOCOL.

Referenced by l2cap_notify_channel_can_send().

static int l2cap_fixed_channel_table_index_for_channel_id ( uint16_t  channel_id )

static

References L2CAP_CID_ATTRIBUTE_PROTOCOL, L2CAP_CID_CONNECTIONLESS_CHANNEL, L2CAP_CID_SECURITY_MANAGER_PROTOCOL, L2CAP_FIXED_CHANNEL_TABLE_INDEX_ATTRIBUTE_PROTOCOL, L2CAP_FIXED_CHANNEL_TABLE_INDEX_CONNECTIONLESS_CHANNEL, and L2CAP_FIXED_CHANNEL_TABLE_INDEX_SECURITY_MANAGER_PROTOCOL.

Referenced by l2cap_register_fixed_channel(), and l2cap_request_can_send_fix_channel_now_event().

static int l2cap_fixed_channel_table_index_is_le ( int  index )

static

References L2CAP_CID_CONNECTIONLESS_CHANNEL.

Referenced by l2cap_notify_channel_can_send().

uint8_t* l2cap_get_outgoing_buffer

(

void

)

Get outgoing buffer and prepare data.

References COMPLETE_L2CAP_HEADER, and hci_get_outgoing_packet_buffer().

Referenced by att_confirmation(), att_exchange_mtu_request(), att_execute_write_request(), att_find_by_type_value_request(), att_find_information_request(), att_prepare_write_request(), att_read_blob_request(), att_read_by_type_or_group_request_for_uuid128(), att_read_by_type_or_group_request_for_uuid16(), att_read_multiple_request(), att_read_request(), att_server_indicate(), att_server_notify(), att_server_process_validated_request(), and att_write_request().

static void l2cap_hci_event_handler ( uint8_t  packet_type, uint16_t  channel, uint8_t *  packet, uint16_t  size  )

static

References btstack_linked_list_iterator_has_next(), btstack_linked_list_iterator_init(), btstack_linked_list_iterator_next(), btstack_linked_list_iterator_remove(), l2cap_channel_t::con_handle, GAP_CONNECTION_ACL, GAP_EVENT_SECURITY_LEVEL, gap_get_connection_type(), hci_authentication_active_for_handle(), hci_can_send_command_packet_now(), hci_connection_for_handle(), hci_create_connection_cancel, hci_disconnect, hci_disconnect_security_block(), HCI_EVENT_COMMAND_COMPLETE, HCI_EVENT_COMMAND_STATUS, HCI_EVENT_CONNECTION_COMPLETE, HCI_EVENT_DISCONNECTION_COMPLETE, HCI_EVENT_IS_COMMAND_COMPLETE, HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS, hci_event_packet_get_type(), HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE, HCI_EVENT_TRANSPORT_PACKET_SENT, hci_send_cmd(), L2CAP_EVENT_TIMEOUT_CHECK, l2cap_notify_channel_can_send(), l2cap_run(), L2CAP_STATE_WAIT_CLIENT_ACCEPT_OR_REJECT, L2CAP_STATE_WAIT_INCOMING_EXTENDED_FEATURES, L2CAP_STATE_WAIT_INCOMING_SECURITY_LEVEL_UPDATE, L2CAP_STATE_WAIT_OUTGOING_SECURITY_LEVEL_UPDATE, L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_DECLINE, little_endian_read_16(), log_info, l2cap_channel_t::reason, l2cap_channel_t::required_security_level, reverse_bd_addr(), l2cap_channel_t::state, and UNUSED.

Referenced by l2cap_init().

void l2cap_init

(

void

)

Set up L2CAP and register L2CAP with HCI layer.

References btstack_packet_callback_registration_t::callback, gap_connectable_control(), hci_add_event_handler(), hci_register_acl_packet_handler(), l2cap_acl_handler(), l2cap_hci_event_handler(), NULL, and signaling_responses_pending.

Referenced by le_counter_setup(), le_prov_app_setup(), and tss_app_setup().

uint16_t l2cap_max_le_mtu

(

void

)

Get max MTU for LE connections based on btstack configuration.

References l2cap_max_mtu().

Referenced by att_event_packet_handler(), att_exchange_mtu_request(), gatt_client_att_packet_handler(), and peripheral_mtu().

uint16_t l2cap_max_mtu

(

void

)

Get max MTU for Classic connections based on btstack configuration.

References L2CAP_HEADER_SIZE.

Referenced by l2cap_max_le_mtu().

static void l2cap_notify_channel_can_send ( void  )

static

References btstack_linked_list_iterator_has_next(), btstack_linked_list_iterator_init(), btstack_linked_list_iterator_next(), callback, l2cap_channel_t::con_handle, hci_can_send_acl_classic_packet_now(), hci_can_send_acl_le_packet_now(), hci_can_send_acl_packet_now(), l2cap_emit_can_send_now(), l2cap_fixed_channel_table_channel_id_for_index(), l2cap_fixed_channel_table_index_is_le(), L2CAP_FIXED_CHANNEL_TABLE_SIZE, l2cap_channel_t::local_cid, l2cap_channel_t::packet_handler, l2cap_fixed_channel::waiting_for_can_send_now, and l2cap_channel_t::waiting_for_can_send_now.

Referenced by l2cap_hci_event_handler(), and l2cap_request_can_send_fix_channel_now_event().

void l2cap_register_fixed_channel	(	btstack_packet_handler_t	the_packet_handler,
		uint16_t	channel_id
	)

References l2cap_fixed_channel::callback, and l2cap_fixed_channel_table_index_for_channel_id().

Referenced by att_dispatch_register_client(), att_dispatch_register_server(), and sm_init().

void l2cap_register_packet_handler

(

void(*)(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)

handler

)

Registers packet handler for LE Connection Parameter Update events.

References UNUSED.

static void l2cap_register_signaling_response ( hci_con_handle_t  handle, uint8_t  code, uint8_t  sig_id, uint16_t  cid, uint16_t  data  )

static

References l2cap_signaling_response::cid, l2cap_signaling_response::code, l2cap_signaling_response::data, l2cap_signaling_response::handle, l2cap_run(), NR_PENDING_SIGNALING_RESPONSES, l2cap_signaling_response::sig_id, and signaling_responses_pending.

Referenced by l2cap_acl_le_handler().

void l2cap_release_packet_buffer

(

void

)

Release outgoing buffer (only needed if l2cap_send_prepared is not called)

References hci_release_packet_buffer().

Referenced by att_server_process_validated_request().

void l2cap_request_can_send_fix_channel_now_event	(	hci_con_handle_t	con_handle,
		uint16_t	channel_id
	)

References l2cap_fixed_channel_table_index_for_channel_id(), l2cap_notify_channel_can_send(), UNUSED, and l2cap_fixed_channel::waiting_for_can_send_now.

Referenced by att_dispatch_client_request_can_send_now_event(), att_dispatch_server_request_can_send_now_event(), and sm_run().

int l2cap_reserve_packet_buffer

(

void

)

Reserve outgoing buffer.

References hci_reserve_packet_buffer().

Referenced by att_confirmation(), att_exchange_mtu_request(), att_execute_write_request(), att_find_by_type_value_request(), att_find_information_request(), att_prepare_write_request(), att_read_blob_request(), att_read_by_type_or_group_request_for_uuid128(), att_read_by_type_or_group_request_for_uuid16(), att_read_multiple_request(), att_read_request(), att_server_indicate(), att_server_notify(), att_server_process_validated_request(), and att_write_request().

static void l2cap_run ( void  )

static

References l2cap_channel_t::address, hci_connection_t::address_type, BD_ADDR_TYPE_LE_PUBLIC, BD_ADDR_TYPE_LE_RANDOM, btstack_linked_list_iterator_has_next(), btstack_linked_list_iterator_init(), btstack_linked_list_iterator_next(), btstack_linked_list_iterator_remove(), btstack_memory_l2cap_channel_free(), btstack_min(), l2cap_signaling_response::cid, l2cap_signaling_response::code, COMMAND_REJECT, COMMAND_REJECT_LE, l2cap_channel_t::con_handle, hci_connection_t::con_handle, CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS, CON_PARAMETER_UPDATE_DENY, CON_PARAMETER_UPDATE_NONE, CON_PARAMETER_UPDATE_SEND_REQUEST, CON_PARAMETER_UPDATE_SEND_RESPONSE, CONFIGURE_REQUEST, CONFIGURE_RESPONSE, CONNECTION_PARAMETER_UPDATE_REQUEST, CONNECTION_PARAMETER_UPDATE_RESPONSE, CONNECTION_REQUEST, CONNECTION_RESPONSE, l2cap_channel_t::credits_incoming, l2cap_channel_t::credits_outgoing, l2cap_signaling_response::data, DISCONNECTION_REQUEST, DISCONNECTION_RESPONSE, ECHO_REQUEST, ECHO_RESPONSE, l2cap_signaling_response::handle, hci_can_send_acl_packet_now(), hci_can_send_command_packet_now(), hci_connections_get_iterator(), hci_create_connection, hci_disconnect_security_block(), hci_get_outgoing_packet_buffer(), hci_max_acl_data_packet_length(), hci_reserve_packet_buffer(), hci_send_acl_packet_buffer(), hci_send_cmd(), hci_usable_acl_packet_types(), INFORMATION_REQUEST, INFORMATION_RESPONSE, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_REQ, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP_CONT, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP_INVALID, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP_MTU, L2CAP_CHANNEL_STATE_VAR_SEND_CONF_RSP_REJECTED, L2CAP_CHANNEL_STATE_VAR_SEND_CONN_RESP_PEND, L2CAP_CHANNEL_STATE_VAR_SENT_CONF_REQ, L2CAP_CHANNEL_STATE_VAR_SENT_CONF_RSP, L2CAP_CONF_RESULT_SUCCESS, L2CAP_CONF_RESULT_UNACCEPTABLE_PARAMETERS, L2CAP_CONF_RESULT_UNKNOWN_OPTIONS, L2CAP_EVENT_LE_PACKET_SENT, L2CAP_INFO_TYPE_CONNECTIONLESS_MTU, L2CAP_INFO_TYPE_EXTENDED_FEATURES_SUPPORTED, L2CAP_INFO_TYPE_FIXED_CHANNELS_SUPPORTED, l2cap_next_sig_id(), l2cap_setup_header(), L2CAP_STATE_CONFIG, L2CAP_STATE_INVALID, L2CAP_STATE_OPEN, L2CAP_STATE_WAIT_CLIENT_ACCEPT_OR_REJECT, L2CAP_STATE_WAIT_CONNECT_RSP, L2CAP_STATE_WAIT_CONNECTION_COMPLETE, L2CAP_STATE_WAIT_DISCONNECT, L2CAP_STATE_WAIT_INCOMING_SECURITY_LEVEL_UPDATE, L2CAP_STATE_WAIT_LE_CONNECTION_RESPONSE, L2CAP_STATE_WILL_SEND_CONNECTION_REQUEST, L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_ACCEPT, L2CAP_STATE_WILL_SEND_CONNECTION_RESPONSE_DECLINE, L2CAP_STATE_WILL_SEND_CREATE_CONNECTION, L2CAP_STATE_WILL_SEND_DISCONNECT_REQUEST, L2CAP_STATE_WILL_SEND_DISCONNECT_RESPONSE, L2CAP_STATE_WILL_SEND_LE_CONNECTION_REQUEST, L2CAP_STATE_WILL_SEND_LE_CONNECTION_RESPONSE_ACCEPT, L2CAP_STATE_WILL_SEND_LE_CONNECTION_RESPONSE_DECLINE, L2CAP_SUPERVISORY_FUNCTION_REJ_REJECT, L2CAP_SUPERVISORY_FUNCTION_RNR_RECEIVER_NOT_READY, L2CAP_SUPERVISORY_FUNCTION_RR_RECEIVER_READY, L2CAP_SUPERVISORY_FUNCTION_SREJ_SELECTIVE_REJECT, hci_connection_t::le_con_param_update_identifier, hci_connection_t::le_con_parameter_update_state, hci_connection_t::le_conn_interval_max, hci_connection_t::le_conn_interval_min, hci_connection_t::le_conn_latency, LE_CREDIT_BASED_CONNECTION_REQUEST, LE_CREDIT_BASED_CONNECTION_RESPONSE, LE_FLOW_CONTROL_CREDIT, hci_connection_t::le_supervision_timeout, little_endian_store_16(), l2cap_channel_t::local_cid, l2cap_channel_t::local_mtu, l2cap_channel_t::local_sig_id, log_info, l2cap_channel_t::new_credits_incoming, NULL, l2cap_channel_t::psm, l2cap_channel_t::reason, l2cap_channel_t::remote_cid, l2cap_channel_t::remote_mps, l2cap_channel_t::remote_sig_id, l2cap_ertm_tx_packet_state_t::retransmission_requested, l2cap_channel_t::send_sdu_buffer, l2cap_channel_t::send_sdu_len, l2cap_channel_t::send_sdu_pos, l2cap_signaling_response::sig_id, signaling_responses_pending, source_cid, l2cap_channel_t::state, and l2cap_channel_t::state_var.

Referenced by l2cap_acl_handler(), l2cap_hci_event_handler(), and l2cap_register_signaling_response().

int l2cap_send_connectionless	(	hci_con_handle_t	con_handle,
		uint16_t	cid,
		uint8_t *	data,
		uint16_t	len
	)

References BTSTACK_ACL_BUFFERS_FULL, hci_can_send_acl_packet_now(), hci_get_outgoing_packet_buffer(), hci_reserve_packet_buffer(), l2cap_send_prepared_connectionless(), and log_info.

Referenced by sm_run().

int l2cap_send_prepared_connectionless	(	hci_con_handle_t	con_handle,
		uint16_t	cid,
		uint16_t	len
	)

References BTSTACK_ACL_BUFFERS_FULL, hci_can_send_prepared_acl_packet_now(), hci_get_outgoing_packet_buffer(), hci_is_packet_buffer_reserved(), hci_send_acl_packet_buffer(), l2cap_setup_header(), log_debug, log_error, and log_info.

Referenced by att_confirmation(), att_exchange_mtu_request(), att_execute_write_request(), att_find_by_type_value_request(), att_find_information_request(), att_prepare_write_request(), att_read_blob_request(), att_read_by_type_or_group_request_for_uuid128(), att_read_by_type_or_group_request_for_uuid16(), att_read_multiple_request(), att_read_request(), att_server_indicate(), att_server_notify(), att_server_process_validated_request(), att_write_request(), and l2cap_send_connectionless().

static void l2cap_setup_header ( uint8_t *  acl_buffer, hci_con_handle_t  con_handle, uint8_t  packet_boundary, uint16_t  remote_cid, uint16_t  len  )

static

References little_endian_store_16().

Referenced by l2cap_run(), and l2cap_send_prepared_connectionless().

l2cap_fixed_channel_t fixed_channels[L2CAP_FIXED_CHANNEL_TABLE_SIZE]

static

btstack_packet_callback_registration_t hci_event_callback_registration

static

l2cap_signaling_response_t signaling_responses[NR_PENDING_SIGNALING_RESPONSES]

static

int signaling_responses_pending

static

Referenced by l2cap_init(), l2cap_register_signaling_response(), and l2cap_run().