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* Copyright (C) 1999-2012 Broadcom Corporation
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
* This file contains L2CAP internal definitions
#ifndef L2C_INT_H
#define L2C_INT_H
#include <stdbool.h>
#include "bt_common.h"
#include "btm_api.h"
#include "l2c_api.h"
#include "l2cdefs.h"
#include "osi/include/alarm.h"
#include "osi/include/fixed_queue.h"
#include "osi/include/list.h"
#define L2CAP_MIN_MTU 48 /* Minimum acceptable MTU is 48 bytes */
/* LE credit based L2CAP connection parameters */
#define L2CAP_LE_MIN_MTU 23
#define L2CAP_LE_MIN_MPS 23
#define L2CAP_LE_MAX_MPS 65533
#define L2CAP_LE_MAX_CREDIT 65535
#define L2CAP_LE_DEFAULT_MTU 512
* Timeout values (in milliseconds).
#define L2CAP_LINK_ROLE_SWITCH_TIMEOUT_MS (10 * 1000) /* 10 seconds */
#define L2CAP_LINK_CONNECT_TIMEOUT_MS (60 * 1000) /* 30 seconds */
#define L2CAP_LINK_CONNECT_EXT_TIMEOUT_MS (120 * 1000) /* 120 seconds */
#define L2CAP_ECHO_RSP_TIMEOUT_MS (30 * 1000) /* 30 seconds */
#define L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS (2 * 1000) /* 2 seconds */
#define L2CAP_LINK_DISCONNECT_TIMEOUT_MS (30 * 1000) /* 30 seconds */
#define L2CAP_CHNL_CONNECT_TIMEOUT_MS (60 * 1000) /* 60 seconds */
#define L2CAP_CHNL_CONNECT_EXT_TIMEOUT_MS (120 * 1000) /* 120 seconds */
#define L2CAP_CHNL_CFG_TIMEOUT_MS (30 * 1000) /* 30 seconds */
#define L2CAP_CHNL_DISCONNECT_TIMEOUT_MS (10 * 1000) /* 10 seconds */
#define L2CAP_DELAY_CHECK_SM4_TIMEOUT_MS (2 * 1000) /* 2 seconds */
#define L2CAP_WAIT_INFO_RSP_TIMEOUT_MS (3 * 1000) /* 3 seconds */
#define L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS (30 * 1000) /* 30 seconds */
#define L2CAP_FCR_ACK_TIMEOUT_MS 200 /* 200 milliseconds */
/* Define the possible L2CAP channel states. The names of
* the states may seem a bit strange, but they are taken from
* the Bluetooth specification.
typedef enum {
CST_CLOSED, /* Channel is in closed state */
CST_ORIG_W4_SEC_COMP, /* Originator waits security clearence */
CST_TERM_W4_SEC_COMP, /* Acceptor waits security clearence */
CST_W4_L2CAP_CONNECT_RSP, /* Waiting for peer conenct response */
CST_W4_L2CA_CONNECT_RSP, /* Waiting for upper layer connect rsp */
CST_CONFIG, /* Negotiating configuration */
CST_OPEN, /* Data transfer state */
CST_W4_L2CAP_DISCONNECT_RSP, /* Waiting for peer disconnect rsp */
CST_W4_L2CA_DISCONNECT_RSP /* Waiting for upper layer disc rsp */
/* Define the possible L2CAP link states
typedef enum {
/* Define input events to the L2CAP link and channel state machines. The names
* of the events may seem a bit strange, but they are taken from
* the Bluetooth specification.
/* Lower layer */
#define L2CEVT_LP_CONNECT_CFM 0 /* connect confirm */
#define L2CEVT_LP_CONNECT_CFM_NEG 1 /* connect confirm (failed) */
#define L2CEVT_LP_CONNECT_IND 2 /* connect indication */
#define L2CEVT_LP_DISCONNECT_IND 3 /* disconnect indication */
#define L2CEVT_LP_QOS_CFM 4 /* QOS confirmation */
#define L2CEVT_LP_QOS_CFM_NEG 5 /* QOS confirmation (failed)*/
#define L2CEVT_LP_QOS_VIOLATION_IND 6 /* QOS violation indication */
/* Security */
#define L2CEVT_SEC_COMP 7 /* cleared successfully */
#define L2CEVT_SEC_COMP_NEG 8 /* procedure failed */
/* Peer connection */
#define L2CEVT_L2CAP_CONNECT_REQ 10 /* request */
#define L2CEVT_L2CAP_CONNECT_RSP 11 /* response */
#define L2CEVT_L2CAP_CONNECT_RSP_PND 12 /* response pending */
#define L2CEVT_L2CAP_CONNECT_RSP_NEG 13 /* response (failed) */
/* Peer configuration */
#define L2CEVT_L2CAP_CONFIG_REQ 14 /* request */
#define L2CEVT_L2CAP_CONFIG_RSP 15 /* response */
#define L2CEVT_L2CAP_CONFIG_RSP_NEG 16 /* response (failed) */
#define L2CEVT_L2CAP_DISCONNECT_REQ 17 /* Peer disconnect request */
#define L2CEVT_L2CAP_DISCONNECT_RSP 18 /* Peer disconnect response */
#define L2CEVT_L2CAP_INFO_RSP 19 /* Peer information response */
#define L2CEVT_L2CAP_DATA 20 /* Peer data */
/* Upper layer */
#define L2CEVT_L2CA_CONNECT_REQ 21 /* connect request */
#define L2CEVT_L2CA_CONNECT_RSP 22 /* connect response */
#define L2CEVT_L2CA_CONNECT_RSP_NEG 23 /* connect response (failed)*/
#define L2CEVT_L2CA_CONFIG_REQ 24 /* config request */
#define L2CEVT_L2CA_CONFIG_RSP 25 /* config response */
#define L2CEVT_L2CA_CONFIG_RSP_NEG 26 /* config response (failed) */
#define L2CEVT_L2CA_DISCONNECT_REQ 27 /* disconnect request */
#define L2CEVT_L2CA_DISCONNECT_RSP 28 /* disconnect response */
#define L2CEVT_L2CA_DATA_READ 29 /* data read */
#define L2CEVT_L2CA_DATA_WRITE 30 /* data write */
#define L2CEVT_L2CA_FLUSH_REQ 31 /* flush */
#define L2CEVT_TIMEOUT 32 /* Timeout */
#define L2CEVT_SEC_RE_SEND_CMD 33 /* btm_sec has enough info to proceed */
#define L2CEVT_ACK_TIMEOUT 34 /* RR delay timeout */
35 /* Upper layer credit packet \
#define L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT 36 /* Peer credit packet */
/* Bitmask to skip over Broadcom feature reserved (ID) to avoid sending two
successive ID values, '0' id only or both */
#define L2CAP_ADJ_BRCM_ID 0x1
#define L2CAP_ADJ_ZERO_ID 0x2
#define L2CAP_ADJ_ID 0x3
/* Return values for l2cu_process_peer_cfg_req() */
#define L2CAP_PEER_CFG_OK 1
/* eL2CAP option constants */
/* Min retransmission timeout if no flush timeout or PBF */
/* Min monitor timeout if no flush timeout or PBF */
#define L2CAP_MIN_MONITOR_TOUT 12000
#define L2CAP_MAX_FCR_CFG_TRIES 2 /* Config attempts before disconnecting */
typedef uint8_t tL2C_BLE_FIXED_CHNLS_MASK;
typedef struct {
uint8_t next_tx_seq; /* Next sequence number to be Tx'ed */
uint8_t last_rx_ack; /* Last sequence number ack'ed by the peer */
uint8_t next_seq_expected; /* Next peer sequence number expected */
uint8_t last_ack_sent; /* Last peer sequence number ack'ed */
uint8_t num_tries; /* Number of retries to send a packet */
uint8_t max_held_acks; /* Max acks we can hold before sending */
bool remote_busy; /* true if peer has flowed us off */
bool local_busy; /* true if we have flowed off the peer */
bool rej_sent; /* Reject was sent */
bool srej_sent; /* Selective Reject was sent */
bool wait_ack; /* Transmitter is waiting ack (poll sent) */
bool rej_after_srej; /* Send a REJ when SREJ clears */
bool send_f_rsp; /* We need to send an F-bit response */
uint16_t rx_sdu_len; /* Length of the SDU being received */
BT_HDR* p_rx_sdu; /* Buffer holding the SDU being received */
waiting_for_ack_q; /* Buffers sent and waiting for peer to ack */
fixed_queue_t* srej_rcv_hold_q; /* Buffers rcvd but held pending SREJ rsp */
fixed_queue_t* retrans_q; /* Buffers being retransmitted */
alarm_t* ack_timer; /* Timer delaying RR */
alarm_t* mon_retrans_timer; /* Timer Monitor or Retransmission */
uint32_t connect_tick_count; /* Time channel was established */
uint32_t ertm_pkt_counts[2]; /* Packets sent and received */
uint32_t ertm_byte_counts[2]; /* Bytes sent and received */
uint32_t s_frames_sent[4]; /* S-frames sent (RR, REJ, RNR, SREJ) */
uint32_t s_frames_rcvd[4]; /* S-frames rcvd (RR, REJ, RNR, SREJ) */
uint32_t xmit_window_closed; /* # of times the xmit window was closed */
uint32_t controller_idle; /* # of times less than 2 packets in controller */
/* when the xmit window was closed */
uint32_t pkts_retransmitted; /* # of packets that were retransmitted */
uint32_t retrans_touts; /* # of retransmission timouts */
uint32_t xmit_ack_touts; /* # of xmit ack timouts */
uint32_t ack_delay_avg_count;
uint32_t ack_delay_avg_index;
uint32_t throughput_start;
uint32_t throughput[L2CAP_ERTM_STATS_NUM_AVG];
uint32_t ack_delay_avg[L2CAP_ERTM_STATS_NUM_AVG];
uint32_t ack_delay_min[L2CAP_ERTM_STATS_NUM_AVG];
uint32_t ack_delay_max[L2CAP_ERTM_STATS_NUM_AVG];
uint32_t ack_q_count_avg[L2CAP_ERTM_STATS_NUM_AVG];
uint32_t ack_q_count_min[L2CAP_ERTM_STATS_NUM_AVG];
uint32_t ack_q_count_max[L2CAP_ERTM_STATS_NUM_AVG];
} tL2C_FCRB;
/* Define a registration control block. Every application (e.g. RFCOMM, SDP,
* TCS etc) that registers with L2CAP is assigned one of these.
#define L2C_UCD_RCB_ID 0x00
#define L2C_UCD_STATE_UNUSED 0x00
#define L2C_UCD_STATE_W4_DATA 0x01
#define L2C_UCD_STATE_W4_MTU 0x04
typedef struct {
uint8_t state;
tL2CAP_UCD_CB_INFO cb_info;
typedef struct {
bool in_use;
uint16_t psm;
uint16_t real_psm; /* This may be a dummy RCB for an o/b connection but */
/* this is the real PSM that we need to connect to */
tL2C_UCD_REG ucd;
} tL2C_RCB;
typedef void(tL2CAP_SEC_CBACK)(const RawAddress& bd_addr,
tBT_TRANSPORT trasnport, void* p_ref_data,
tBTM_STATUS result);
typedef struct {
uint16_t psm;
tBT_TRANSPORT transport;
bool is_originator;
tL2CAP_SEC_CBACK* p_callback;
void* p_ref_data;
/* Define a channel control block (CCB). There may be many channel control
* blocks between the same two Bluetooth devices (i.e. on the same link).
* Each CCB has unique local and remote CIDs. All channel control blocks on
* the same physical link and are chained together.
typedef struct t_l2c_ccb {
bool in_use; /* true when in use, false when not */
tL2C_CHNL_STATE chnl_state; /* Channel state */
local_conn_cfg; /* Our config for ble conn oriented channel */
peer_conn_cfg; /* Peer device config ble conn oriented channel */
bool is_first_seg; /* Dtermine whether the received packet is the first
segment or not */
BT_HDR* ble_sdu; /* Buffer for storing unassembled sdu*/
uint16_t ble_sdu_length; /* Length of unassembled sdu length*/
struct t_l2c_ccb* p_next_ccb; /* Next CCB in the chain */
struct t_l2c_ccb* p_prev_ccb; /* Previous CCB in the chain */
struct t_l2c_linkcb* p_lcb; /* Link this CCB is assigned to */
uint16_t local_cid; /* Local CID */
uint16_t remote_cid; /* Remote CID */
alarm_t* l2c_ccb_timer; /* CCB Timer Entry */
tL2C_RCB* p_rcb; /* Registration CB for this Channel */
bool should_free_rcb; /* True if RCB was allocated on the heap */
#define IB_CFG_DONE 0x01
#define OB_CFG_DONE 0x02
#define RECONFIG_FLAG 0x04 /* True after initial configuration */
uint8_t config_done; /* Configuration flag word */
uint8_t local_id; /* Transaction ID for local trans */
uint8_t remote_id; /* Transaction ID for local */
#define CCB_FLAG_NO_RETRY 0x01 /* no more retry */
#define CCB_FLAG_SENT_PENDING 0x02 /* already sent pending response */
uint8_t flags;
tL2CAP_CFG_INFO our_cfg; /* Our saved configuration options */
tL2CAP_CH_CFG_BITS peer_cfg_bits; /* Store what peer wants to configure */
tL2CAP_CFG_INFO peer_cfg; /* Peer's saved configuration options */
fixed_queue_t* xmit_hold_q; /* Transmit data hold queue */
bool cong_sent; /* Set when congested status sent */
uint16_t buff_quota; /* Buffer quota before sending congestion */
tL2CAP_CHNL_PRIORITY ccb_priority; /* Channel priority */
tL2CAP_CHNL_DATA_RATE tx_data_rate; /* Channel Tx data rate */
tL2CAP_CHNL_DATA_RATE rx_data_rate; /* Channel Rx data rate */
/* Fields used for eL2CAP */
tL2CAP_ERTM_INFO ertm_info;
tL2C_FCRB fcrb;
uint16_t tx_mps; /* TX MPS adjusted based on current controller */
uint16_t max_rx_mtu;
uint8_t fcr_cfg_tries; /* Max number of negotiation attempts */
bool peer_cfg_already_rejected; /* If mode rejected once, set to true */
bool out_cfg_fcr_present; /* true if cfg response shoulkd include fcr options
#define L2CAP_CFG_FCS_OUR 0x01 /* Our desired config FCS option */
#define L2CAP_CFG_FCS_PEER 0x02 /* Peer's desired config FCS option */
uint8_t bypass_fcs;
bool is_flushable; /* true if channel is flushable */
uint16_t fixed_chnl_idle_tout; /* Idle timeout to use for the fixed channel */
uint16_t tx_data_len;
} tL2C_CCB;
* Define a queue of linked CCBs.
typedef struct {
tL2C_CCB* p_first_ccb; /* The first channel in this queue */
tL2C_CCB* p_last_ccb; /* The last channel in this queue */
} tL2C_CCB_Q;
/* Round-Robin service for the same priority channels */
3 /* Total number of priority group (high, medium, low)*/
5 /* weight per priority for burst transmission quota */
/* CCBs within the same LCB are served in round robin with priority It will make
* sure that low priority channel (for example, HF signaling on RFCOMM) can be
* sent to the headset even if higher priority channel (for example, AV media
* channel) is congested.
typedef struct {
tL2C_CCB* p_serve_ccb; /* current serving ccb within priority group */
tL2C_CCB* p_first_ccb; /* first ccb of priority group */
uint8_t num_ccb; /* number of channels in priority group */
uint8_t quota; /* burst transmission quota */
/* Define a link control block. There is one link control block between
* this device and any other device (i.e. BD ADDR).
typedef struct t_l2c_linkcb {
bool in_use; /* true when in use, false when not */
tL2C_LINK_STATE link_state;
alarm_t* l2c_lcb_timer; /* Timer entry for timeout evt */
uint16_t handle; /* The handle used with LM */
tL2C_CCB_Q ccb_queue; /* Queue of CCBs on this LCB */
tL2C_CCB* p_pending_ccb; /* ccb of waiting channel during link disconnect */
alarm_t* info_resp_timer; /* Timer entry for info resp timeout evt */
RawAddress remote_bd_addr; /* The BD address of the remote */
uint8_t link_role; /* Master or slave */
uint8_t id;
uint8_t cur_echo_id; /* Current id value for echo request */
tL2CA_ECHO_RSP_CB* p_echo_rsp_cb; /* Echo response callback */
uint16_t idle_timeout; /* Idle timeout */
bool is_bonding; /* True - link active only for bonding */
uint16_t link_flush_tout; /* Flush timeout used */
uint16_t link_xmit_quota; /* Num outstanding pkts allowed */
uint16_t sent_not_acked; /* Num packets sent but not acked */
bool partial_segment_being_sent; /* Set true when a partial segment */
/* is being sent. */
bool w4_info_rsp; /* true when info request is active */
uint8_t info_rx_bits; /* set 1 if received info type */
uint32_t peer_ext_fea; /* Peer's extended features mask */
list_t* link_xmit_data_q; /* Link transmit data buffer queue */
uint8_t peer_chnl_mask[L2CAP_FIXED_CHNL_ARRAY_SIZE];
uint16_t ucd_mtu; /* peer MTU on UCD */
ucd_out_sec_pending_q; /* Security pending outgoing UCD packet */
ucd_in_sec_pending_q; /* Security pending incoming UCD packet */
BT_HDR* p_hcit_rcv_acl; /* Current HCIT ACL buf being rcvd */
uint16_t idle_timeout_sv; /* Save current Idle timeout */
uint8_t acl_priority; /* L2C_PRIORITY_NORMAL or L2C_PRIORITY_HIGH */
tL2CA_NOCP_CB* p_nocp_cb; /* Num Cmpl pkts callback */
tL2C_CCB* p_fixed_ccbs[L2CAP_NUM_FIXED_CHNLS];
uint16_t disc_reason;
tBT_TRANSPORT transport;
uint8_t initiating_phys; // LE PHY used for connection initiation
tBLE_ADDR_TYPE ble_addr_type;
uint16_t tx_data_len; /* tx data length used in data length extension */
fixed_queue_t* le_sec_pending_q; /* LE coc channels waiting for security check
completion */
uint8_t sec_act;
0x1 /* disable update connection parameters */
#define L2C_BLE_NEW_CONN_PARAM 0x2 /* new connection parameter to be set */
0x4 /* waiting for connection update finished \
0x8 /* not using default connection parameters */
uint8_t conn_update_mask;
uint16_t min_interval; /* parameters as requested by peripheral */
uint16_t max_interval;
uint16_t latency;
uint16_t timeout;
/* each priority group is limited burst transmission */
/* round robin service for the same priority channels */
uint8_t rr_pri; /* current serving priority group */
} tL2C_LCB;
/* Define the L2CAP control structure
typedef struct {
uint8_t l2cap_trace_level;
uint16_t controller_xmit_window; /* Total ACL window for all links */
uint16_t round_robin_quota; /* Round-robin link quota */
uint16_t round_robin_unacked; /* Round-robin unacked */
bool check_round_robin; /* Do a round robin check */
bool is_cong_cback_context;
tL2C_LCB lcb_pool[MAX_L2CAP_LINKS]; /* Link Control Block pool */
tL2C_CCB ccb_pool[MAX_L2CAP_CHANNELS]; /* Channel Control Block pool */
tL2C_RCB rcb_pool[MAX_L2CAP_CLIENTS]; /* Registration info pool */
tL2C_CCB* p_free_ccb_first; /* Pointer to first free CCB */
tL2C_CCB* p_free_ccb_last; /* Pointer to last free CCB */
desire_role; /* desire to be master/slave when accepting a connection */
bool disallow_switch; /* false, to allow switch at create conn */
uint16_t num_lm_acl_bufs; /* # of ACL buffers on controller */
uint16_t idle_timeout; /* Idle timeout */
list_t* rcv_pending_q; /* Recv pending queue */
alarm_t* receive_hold_timer; /* Timer entry for rcv hold */
tL2C_LCB* p_cur_hcit_lcb; /* Current HCI Transport buffer */
uint16_t num_links_active; /* Number of links active */
uint16_t non_flushable_pbf; /* L2CAP_PKT_START_NON_FLUSHABLE if controller
supports */
/* Otherwise, L2CAP_PKT_START */
bool is_flush_active; /* true if an HCI_Enhanced_Flush has been sent */
uint32_t test_info_resp; /* Conformance testing needs a dynamic response */
fixed_reg[L2CAP_NUM_FIXED_CHNLS]; /* Reg info for fixed channels */
uint16_t num_ble_links_active; /* Number of LE links active */
bool is_ble_connecting;
RawAddress ble_connecting_bda;
uint16_t controller_le_xmit_window; /* Total ACL window for all links */
tL2C_BLE_FIXED_CHNLS_MASK l2c_ble_fixed_chnls_mask; // LE fixed channels mask
uint16_t num_lm_ble_bufs; /* # of ACL buffers on controller */
uint16_t ble_round_robin_quota; /* Round-robin link quota */
uint16_t ble_round_robin_unacked; /* Round-robin unacked */
bool ble_check_round_robin; /* Do a round robin check */
tL2C_RCB ble_rcb_pool[BLE_MAX_L2CAP_CLIENTS]; /* Registration info pool */
tL2CA_ECHO_DATA_CB* p_echo_data_cb; /* Echo data callback */
uint16_t high_pri_min_xmit_quota; /* Minimum number of ACL credit for high
priority link */
uint16_t dyn_psm;
} tL2C_CB;
/* Define a structure that contains the information about a connection.
* This structure is used to pass between functions, and not all the
* fields will always be filled in.
typedef struct {
RawAddress bd_addr; /* Remote BD address */
uint8_t status; /* Connection status */
uint16_t psm; /* PSM of the connection */
uint16_t l2cap_result; /* L2CAP result */
uint16_t l2cap_status; /* L2CAP status */
uint16_t remote_cid; /* Remote CID */
typedef void(tL2C_FCR_MGMT_EVT_HDLR)(uint8_t, tL2C_CCB*);
/* Necessary info for postponed TX completion callback
typedef struct {
uint16_t local_cid;
uint16_t num_sdu;
/* The offset in a buffer that L2CAP will use when building commands.
/* Number of ACL buffers to use for high priority channel
#define L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A (l2cb.high_pri_min_xmit_quota)
/* L2CAP global data
extern tL2C_CB l2cb;
/* Functions provided by
void l2c_init(void);
void l2c_free(void);
extern void l2c_receive_hold_timer_timeout(void* data);
extern void l2c_ccb_timer_timeout(void* data);
extern void l2c_lcb_timer_timeout(void* data);
extern void l2c_fcrb_ack_timer_timeout(void* data);
extern uint8_t l2c_data_write(uint16_t cid, BT_HDR* p_data, uint16_t flag);
extern void l2c_rcv_acl_data(BT_HDR* p_msg);
extern void l2c_process_held_packets(bool timed_out);
/* Functions provided by
extern bool l2cu_can_allocate_lcb(void);
extern tL2C_LCB* l2cu_allocate_lcb(const RawAddress& p_bd_addr, bool is_bonding,
tBT_TRANSPORT transport);
extern bool l2cu_start_post_bond_timer(uint16_t handle);
extern void l2cu_release_lcb(tL2C_LCB* p_lcb);
extern tL2C_LCB* l2cu_find_lcb_by_bd_addr(const RawAddress& p_bd_addr,
tBT_TRANSPORT transport);
extern tL2C_LCB* l2cu_find_lcb_by_handle(uint16_t handle);
extern void l2cu_update_lcb_4_bonding(const RawAddress& p_bd_addr,
bool is_bonding);
extern uint8_t l2cu_get_conn_role(tL2C_LCB* p_this_lcb);
extern bool l2cu_set_acl_priority(const RawAddress& bd_addr, uint8_t priority,
bool reset_after_rs);
extern void l2cu_enqueue_ccb(tL2C_CCB* p_ccb);
extern void l2cu_dequeue_ccb(tL2C_CCB* p_ccb);
extern void l2cu_change_pri_ccb(tL2C_CCB* p_ccb, tL2CAP_CHNL_PRIORITY priority);
extern tL2C_CCB* l2cu_allocate_ccb(tL2C_LCB* p_lcb, uint16_t cid);
extern void l2cu_release_ccb(tL2C_CCB* p_ccb);
extern tL2C_CCB* l2cu_find_ccb_by_cid(tL2C_LCB* p_lcb, uint16_t local_cid);
extern tL2C_CCB* l2cu_find_ccb_by_remote_cid(tL2C_LCB* p_lcb,
uint16_t remote_cid);
extern void l2cu_adj_id(tL2C_LCB* p_lcb, uint8_t adj_mask);
extern bool l2c_is_cmd_rejected(uint8_t cmd_code, uint8_t id, tL2C_LCB* p_lcb);
extern void l2cu_send_peer_cmd_reject(tL2C_LCB* p_lcb, uint16_t reason,
uint8_t rem_id, uint16_t p1, uint16_t p2);
extern void l2cu_send_peer_connect_req(tL2C_CCB* p_ccb);
extern void l2cu_send_peer_connect_rsp(tL2C_CCB* p_ccb, uint16_t result,
uint16_t status);
extern void l2cu_send_peer_config_req(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg);
extern void l2cu_send_peer_config_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg);
extern void l2cu_send_peer_config_rej(tL2C_CCB* p_ccb, uint8_t* p_data,
uint16_t data_len, uint16_t rej_len);
extern void l2cu_send_peer_disc_req(tL2C_CCB* p_ccb);
extern void l2cu_send_peer_disc_rsp(tL2C_LCB* p_lcb, uint8_t remote_id,
uint16_t local_cid, uint16_t remote_cid);
extern void l2cu_send_peer_echo_req(tL2C_LCB* p_lcb, uint8_t* p_data,
uint16_t data_len);
extern void l2cu_send_peer_echo_rsp(tL2C_LCB* p_lcb, uint8_t id,
uint8_t* p_data, uint16_t data_len);
extern void l2cu_send_peer_info_rsp(tL2C_LCB* p_lcb, uint8_t id,
uint16_t info_type);
extern void l2cu_reject_connection(tL2C_LCB* p_lcb, uint16_t remote_cid,
uint8_t rem_id, uint16_t result);
extern void l2cu_send_peer_info_req(tL2C_LCB* p_lcb, uint16_t info_type);
extern void l2cu_set_acl_hci_header(BT_HDR* p_buf, tL2C_CCB* p_ccb);
extern void l2cu_check_channel_congestion(tL2C_CCB* p_ccb);
extern void l2cu_disconnect_chnl(tL2C_CCB* p_ccb);
extern void l2cu_tx_complete(tL2C_TX_COMPLETE_CB_INFO* p_cbi);
extern void l2cu_set_non_flushable_pbf(bool);
extern void l2cu_send_peer_ble_par_req(tL2C_LCB* p_lcb, uint16_t min_int,
uint16_t max_int, uint16_t latency,
uint16_t timeout);
extern void l2cu_send_peer_ble_par_rsp(tL2C_LCB* p_lcb, uint16_t reason,
uint8_t rem_id);
extern void l2cu_reject_ble_connection(tL2C_LCB* p_lcb, uint8_t rem_id,
uint16_t result);
extern void l2cu_send_peer_ble_credit_based_conn_res(tL2C_CCB* p_ccb,
uint16_t result);
extern void l2cu_send_peer_ble_credit_based_conn_req(tL2C_CCB* p_ccb);
extern void l2cu_send_peer_ble_flow_control_credit(tL2C_CCB* p_ccb,
uint16_t credit_value);
extern void l2cu_send_peer_ble_credit_based_disconn_req(tL2C_CCB* p_ccb);
extern bool l2cu_initialize_fixed_ccb(tL2C_LCB* p_lcb, uint16_t fixed_cid,
tL2CAP_FCR_OPTS* p_fcr);
extern void l2cu_no_dynamic_ccbs(tL2C_LCB* p_lcb);
extern void l2cu_process_fixed_chnl_resp(tL2C_LCB* p_lcb);
extern bool l2cu_is_ccb_active(tL2C_CCB* p_ccb);
/* Functions provided by
void l2c_ucd_delete_sec_pending_q(tL2C_LCB* p_lcb);
void l2c_ucd_enqueue_pending_out_sec_q(tL2C_CCB* p_ccb, void* p_data);
bool l2c_ucd_check_pending_info_req(tL2C_CCB* p_ccb);
bool l2c_ucd_check_pending_out_sec_q(tL2C_CCB* p_ccb);
void l2c_ucd_send_pending_out_sec_q(tL2C_CCB* p_ccb);
void l2c_ucd_discard_pending_out_sec_q(tL2C_CCB* p_ccb);
bool l2c_ucd_check_pending_in_sec_q(tL2C_CCB* p_ccb);
void l2c_ucd_send_pending_in_sec_q(tL2C_CCB* p_ccb);
void l2c_ucd_discard_pending_in_sec_q(tL2C_CCB* p_ccb);
bool l2c_ucd_check_rx_pkts(tL2C_LCB* p_lcb, BT_HDR* p_msg);
bool l2c_ucd_process_event(tL2C_CCB* p_ccb, uint16_t event, void* p_data);
/* Functions provided for Broadcom Aware
extern bool l2cu_check_feature_req(tL2C_LCB* p_lcb, uint8_t id, uint8_t* p_data,
uint16_t data_len);
extern void l2cu_check_feature_rsp(tL2C_LCB* p_lcb, uint8_t id, uint8_t* p_data,
uint16_t data_len);
extern void l2cu_send_feature_req(tL2C_CCB* p_ccb);
extern tL2C_RCB* l2cu_allocate_rcb(uint16_t psm);
extern tL2C_RCB* l2cu_find_rcb_by_psm(uint16_t psm);
extern void l2cu_release_rcb(tL2C_RCB* p_rcb);
extern tL2C_RCB* l2cu_allocate_ble_rcb(uint16_t psm);
extern tL2C_RCB* l2cu_find_ble_rcb_by_psm(uint16_t psm);
extern uint8_t l2cu_process_peer_cfg_req(tL2C_CCB* p_ccb,
tL2CAP_CFG_INFO* p_cfg);
extern void l2cu_process_peer_cfg_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg);
extern void l2cu_process_our_cfg_req(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg);
extern void l2cu_process_our_cfg_rsp(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg);
extern void l2cu_device_reset(void);
extern tL2C_LCB* l2cu_find_lcb_by_state(tL2C_LINK_STATE state);
extern bool l2cu_lcb_disconnecting(void);
extern bool l2cu_create_conn(tL2C_LCB* p_lcb, tBT_TRANSPORT transport);
extern bool l2cu_create_conn(tL2C_LCB* p_lcb, tBT_TRANSPORT transport,
uint8_t initiating_phys);
extern bool l2cu_create_conn_after_switch(tL2C_LCB* p_lcb);
extern BT_HDR* l2cu_get_next_buffer_to_send(tL2C_LCB* p_lcb,
extern void l2cu_resubmit_pending_sec_req(const RawAddress* p_bda);
extern void l2cu_initialize_amp_ccb(tL2C_LCB* p_lcb);
extern void l2cu_adjust_out_mps(tL2C_CCB* p_ccb);
/* Functions provided by
extern bool l2c_link_hci_conn_req(const RawAddress& bd_addr);
extern bool l2c_link_hci_conn_comp(uint8_t status, uint16_t handle,
const RawAddress& p_bda);
extern bool l2c_link_hci_disc_comp(uint16_t handle, uint8_t reason);
extern bool l2c_link_hci_qos_violation(uint16_t handle);
extern void l2c_link_timeout(tL2C_LCB* p_lcb);
extern void l2c_info_resp_timer_timeout(void* data);
extern void l2c_link_check_send_pkts(tL2C_LCB* p_lcb, tL2C_CCB* p_ccb,
BT_HDR* p_buf);
extern void l2c_link_adjust_allocation(void);
extern void l2c_link_process_num_completed_pkts(uint8_t* p);
extern void l2c_link_process_num_completed_blocks(uint8_t controller_id,
uint8_t* p, uint16_t evt_len);
extern void l2c_link_processs_num_bufs(uint16_t num_lm_acl_bufs);
extern uint8_t l2c_link_pkts_rcvd(uint16_t* num_pkts, uint16_t* handles);
extern void l2c_link_role_changed(const RawAddress* bd_addr, uint8_t new_role,
uint8_t hci_status);
extern void l2c_link_sec_comp(const RawAddress* p_bda, tBT_TRANSPORT trasnport,
void* p_ref_data, uint8_t status);
extern void l2c_link_sec_comp2(const RawAddress& p_bda, tBT_TRANSPORT trasnport,
void* p_ref_data, uint8_t status);
extern void l2c_link_segments_xmitted(BT_HDR* p_msg);
extern void l2c_pin_code_request(const RawAddress& bd_addr);
extern void l2c_link_adjust_chnl_allocation(void);
extern void l2c_link_processs_ble_num_bufs(uint16_t num_lm_acl_bufs);
extern bool l2c_link_check_power_mode(tL2C_LCB* p_lcb);
#define L2C_LINK_CHECK_POWER_MODE(x) l2c_link_check_power_mode((x))
#define L2C_LINK_CHECK_POWER_MODE(x) (false)
/* Used only for conformance testing */
extern void l2cu_set_info_rsp_mask(uint32_t mask);
/* Functions provided by
extern void l2c_csm_execute(tL2C_CCB* p_ccb, uint16_t event, void* p_data);
extern void l2c_enqueue_peer_data(tL2C_CCB* p_ccb, BT_HDR* p_buf);
/* Functions provided by
extern void l2c_fcr_cleanup(tL2C_CCB* p_ccb);
extern void l2c_fcr_proc_pdu(tL2C_CCB* p_ccb, BT_HDR* p_buf);
extern void l2c_fcr_proc_tout(tL2C_CCB* p_ccb);
extern void l2c_fcr_proc_ack_tout(tL2C_CCB* p_ccb);
extern void l2c_fcr_send_S_frame(tL2C_CCB* p_ccb, uint16_t function_code,
uint16_t pf_bit);
extern BT_HDR* l2c_fcr_clone_buf(BT_HDR* p_buf, uint16_t new_offset,
uint16_t no_of_bytes);
extern bool l2c_fcr_is_flow_controlled(tL2C_CCB* p_ccb);
extern BT_HDR* l2c_fcr_get_next_xmit_sdu_seg(tL2C_CCB* p_ccb,
uint16_t max_packet_length);
extern void l2c_fcr_start_timer(tL2C_CCB* p_ccb);
extern void l2c_lcc_proc_pdu(tL2C_CCB* p_ccb, BT_HDR* p_buf);
extern BT_HDR* l2c_lcc_get_next_xmit_sdu_seg(tL2C_CCB* p_ccb,
uint16_t max_packet_length);
/* Configuration negotiation */
extern uint8_t l2c_fcr_chk_chan_modes(tL2C_CCB* p_ccb);
extern bool l2c_fcr_adj_our_req_options(tL2C_CCB* p_ccb,
tL2CAP_CFG_INFO* p_cfg);
extern void l2c_fcr_adj_our_rsp_options(tL2C_CCB* p_ccb,
tL2CAP_CFG_INFO* p_peer_cfg);
extern bool l2c_fcr_renegotiate_chan(tL2C_CCB* p_ccb, tL2CAP_CFG_INFO* p_cfg);
extern uint8_t l2c_fcr_process_peer_cfg_req(tL2C_CCB* p_ccb,
tL2CAP_CFG_INFO* p_cfg);
extern void l2c_fcr_adj_monitor_retran_timeout(tL2C_CCB* p_ccb);
extern void l2c_fcr_stop_timer(tL2C_CCB* p_ccb);
/* Functions provided by
extern bool l2cble_create_conn(tL2C_LCB* p_lcb);
extern void l2cble_process_sig_cmd(tL2C_LCB* p_lcb, uint8_t* p,
uint16_t pkt_len);
extern void l2cble_conn_comp(uint16_t handle, uint8_t role,
const RawAddress& bda, tBLE_ADDR_TYPE type,
uint16_t conn_interval, uint16_t conn_latency,
uint16_t conn_timeout);
extern bool l2cble_init_direct_conn(tL2C_LCB* p_lcb);
extern void l2cble_notify_le_connection(const RawAddress& bda);
extern void l2c_ble_link_adjust_allocation(void);
extern void l2cble_process_conn_update_evt(uint16_t handle, uint8_t status,
uint16_t interval, uint16_t latency,
uint16_t timeout);
extern void l2cble_credit_based_conn_req(tL2C_CCB* p_ccb);
extern void l2cble_credit_based_conn_res(tL2C_CCB* p_ccb, uint16_t result);
extern void l2cble_send_peer_disc_req(tL2C_CCB* p_ccb);
extern void l2cble_send_flow_control_credit(tL2C_CCB* p_ccb,
uint16_t credit_value);
extern bool l2ble_sec_access_req(const RawAddress& bd_addr, uint16_t psm,
bool is_originator,
tL2CAP_SEC_CBACK* p_callback,
void* p_ref_data);
extern void l2cble_process_rc_param_request_evt(uint16_t handle,
uint16_t int_min,
uint16_t int_max,
uint16_t latency,
uint16_t timeout);
extern void l2cble_update_data_length(tL2C_LCB* p_lcb);
extern void l2cble_set_fixed_channel_tx_data_length(
const RawAddress& remote_bda, uint16_t fix_cid, uint16_t tx_mtu);
extern void l2cble_process_data_length_change_event(uint16_t handle,
uint16_t tx_data_len,
uint16_t rx_data_len);
extern void l2cu_process_fixed_disc_cback(tL2C_LCB* p_lcb);