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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 "btm_api.h"
#include "gki.h"
#include "l2c_api.h"
#include "l2cdefs.h"
#include "list.h"
#define L2CAP_MIN_MTU 48 /* Minimum acceptable MTU is 48 bytes */
/* Timeouts. Since L2CAP works off a 1-second list, all are in seconds.
#define L2CAP_LINK_ROLE_SWITCH_TOUT 10 /* 10 seconds */
#define L2CAP_LINK_CONNECT_TOUT 60 /* 30 seconds */
#define L2CAP_LINK_CONNECT_TOUT_EXT 120 /* 120 seconds */
#define L2CAP_ECHO_RSP_TOUT 30 /* 30 seconds */
#define L2CAP_LINK_FLOW_CONTROL_TOUT 2 /* 2 seconds */
#define L2CAP_LINK_DISCONNECT_TOUT 30 /* 30 seconds */
#ifndef L2CAP_CHNL_CONNECT_TOUT /* BTIF needs to override for internal project needs */
#define L2CAP_CHNL_CONNECT_TOUT 60 /* 60 seconds */
#define L2CAP_CHNL_CONNECT_TOUT_EXT 120 /* 120 seconds */
#define L2CAP_CHNL_CFG_TIMEOUT 30 /* 30 seconds */
#define L2CAP_CHNL_DISCONNECT_TOUT 10 /* 10 seconds */
#define L2CAP_DELAY_CHECK_SM4 2 /* 2 seconds */
#define L2CAP_WAIT_INFO_RSP_TOUT 3 /* 3 seconds */
#define L2CAP_WAIT_UNPARK_TOUT 2 /* 2 seconds */
#define L2CAP_LINK_INFO_RESP_TOUT 2 /* 2 seconds */
#define L2CAP_BLE_LINK_CONNECT_TOUT 30 /* 30 seconds */
#define L2CAP_BLE_CONN_PARAM_UPD_TOUT 30 /* 30 seconds */
/* quick timer uses millisecond unit */
#define L2CAP_DEFAULT_RETRANS_TOUT 2000 /* 2000 milliseconds */
#define L2CAP_DEFAULT_MONITOR_TOUT 12000 /* 12000 milliseconds */
#define L2CAP_FCR_ACK_TOUT 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 clodes 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.
#define L2CEVT_LP_CONNECT_CFM 0 /* Lower layer connect confirm */
#define L2CEVT_LP_CONNECT_CFM_NEG 1 /* Lower layer connect confirm (failed) */
#define L2CEVT_LP_CONNECT_IND 2 /* Lower layer connect indication */
#define L2CEVT_LP_DISCONNECT_IND 3 /* Lower layer disconnect indication */
#define L2CEVT_LP_QOS_CFM 4 /* Lower layer QOS confirmation */
#define L2CEVT_LP_QOS_CFM_NEG 5 /* Lower layer QOS confirmation (failed)*/
#define L2CEVT_LP_QOS_VIOLATION_IND 6 /* Lower layer QOS violation indication */
#define L2CEVT_SEC_COMP 7 /* Security cleared successfully */
#define L2CEVT_SEC_COMP_NEG 8 /* Security procedure failed */
#define L2CEVT_L2CAP_CONNECT_REQ 10 /* Peer connection request */
#define L2CEVT_L2CAP_CONNECT_RSP 11 /* Peer connection response */
#define L2CEVT_L2CAP_CONNECT_RSP_PND 12 /* Peer connection response pending */
#define L2CEVT_L2CAP_CONNECT_RSP_NEG 13 /* Peer connection response (failed) */
#define L2CEVT_L2CAP_CONFIG_REQ 14 /* Peer configuration request */
#define L2CEVT_L2CAP_CONFIG_RSP 15 /* Peer configuration response */
#define L2CEVT_L2CAP_CONFIG_RSP_NEG 16 /* Peer configuration 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 */
#define L2CEVT_L2CA_CONNECT_REQ 21 /* Upper layer connect request */
#define L2CEVT_L2CA_CONNECT_RSP 22 /* Upper layer connect response */
#define L2CEVT_L2CA_CONNECT_RSP_NEG 23 /* Upper layer connect response (failed)*/
#define L2CEVT_L2CA_CONFIG_REQ 24 /* Upper layer config request */
#define L2CEVT_L2CA_CONFIG_RSP 25 /* Upper layer config response */
#define L2CEVT_L2CA_CONFIG_RSP_NEG 26 /* Upper layer config response (failed) */
#define L2CEVT_L2CA_DISCONNECT_REQ 27 /* Upper layer disconnect request */
#define L2CEVT_L2CA_DISCONNECT_RSP 28 /* Upper layer disconnect response */
#define L2CEVT_L2CA_DATA_READ 29 /* Upper layer data read */
#define L2CEVT_L2CA_DATA_WRITE 30 /* Upper layer data write */
#define L2CEVT_L2CA_FLUSH_REQ 31 /* Upper layer 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 */
/* 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 */
#define L2CAP_MIN_RETRANS_TOUT 2000 /* Min retransmission timeout if no flush timeout or PBF */
#define L2CAP_MIN_MONITOR_TOUT 12000 /* Min monitor timeout if no flush timeout or PBF */
#define L2CAP_MAX_FCR_CFG_TRIES 2 /* Config attempts before disconnecting */
typedef uint8_t tL2C_BLE_FIXED_CHNLS_MASK;
typedef struct
UINT8 next_tx_seq; /* Next sequence number to be Tx'ed */
UINT8 last_rx_ack; /* Last sequence number ack'ed by the peer */
UINT8 next_seq_expected; /* Next peer sequence number expected */
UINT8 last_ack_sent; /* Last peer sequence number ack'ed */
UINT8 num_tries; /* Number of retries to send a packet */
UINT8 max_held_acks; /* Max acks we can hold before sending */
BOOLEAN remote_busy; /* TRUE if peer has flowed us off */
BOOLEAN local_busy; /* TRUE if we have flowed off the peer */
BOOLEAN rej_sent; /* Reject was sent */
BOOLEAN srej_sent; /* Selective Reject was sent */
BOOLEAN wait_ack; /* Transmitter is waiting ack (poll sent) */
BOOLEAN rej_after_srej; /* Send a REJ when SREJ clears */
BOOLEAN send_f_rsp; /* We need to send an F-bit response */
UINT16 rx_sdu_len; /* Length of the SDU being received */
BT_HDR *p_rx_sdu; /* Buffer holding the SDU being received */
BUFFER_Q waiting_for_ack_q; /* Buffers sent and waiting for peer to ack */
BUFFER_Q srej_rcv_hold_q; /* Buffers rcvd but held pending SREJ rsp */
BUFFER_Q retrans_q; /* Buffers being retransmitted */
TIMER_LIST_ENT ack_timer; /* Timer delaying RR */
TIMER_LIST_ENT mon_retrans_timer; /* Timer Monitor or Retransmission */
UINT32 connect_tick_count; /* Time channel was established */
UINT32 ertm_pkt_counts[2]; /* Packets sent and received */
UINT32 ertm_byte_counts[2]; /* Bytes sent and received */
UINT32 s_frames_sent[4]; /* S-frames sent (RR, REJ, RNR, SREJ) */
UINT32 s_frames_rcvd[4]; /* S-frames rcvd (RR, REJ, RNR, SREJ) */
UINT32 xmit_window_closed; /* # of times the xmit window was closed */
UINT32 controller_idle; /* # of times less than 2 packets in controller */
/* when the xmit window was closed */
UINT32 pkts_retransmitted; /* # of packets that were retransmitted */
UINT32 retrans_touts; /* # of retransmission timouts */
UINT32 xmit_ack_touts; /* # of xmit ack timouts */
UINT32 ack_delay_avg_count;
UINT32 ack_delay_avg_index;
UINT32 throughput_start;
UINT32 ack_delay_avg[L2CAP_ERTM_STATS_NUM_AVG];
UINT32 ack_delay_min[L2CAP_ERTM_STATS_NUM_AVG];
UINT32 ack_delay_max[L2CAP_ERTM_STATS_NUM_AVG];
UINT32 ack_q_count_avg[L2CAP_ERTM_STATS_NUM_AVG];
UINT32 ack_q_count_min[L2CAP_ERTM_STATS_NUM_AVG];
UINT32 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 state;
tL2CAP_UCD_CB_INFO cb_info;
typedef struct
BOOLEAN in_use;
UINT16 psm;
UINT16 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;
/* 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
BOOLEAN in_use; /* TRUE when in use, FALSE when not */
tL2C_CHNL_STATE chnl_state; /* Channel state */
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 local_cid; /* Local CID */
UINT16 remote_cid; /* Remote CID */
TIMER_LIST_ENT timer_entry; /* CCB Timer List 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 config_done; /* Configuration flag word */
UINT8 local_id; /* Transaction ID for local trans */
UINT8 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 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 */
BUFFER_Q xmit_hold_q; /* Transmit data hold queue */
BOOLEAN cong_sent; /* Set when congested status sent */
UINT16 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 tx_mps; /* TX MPS adjusted based on current controller */
UINT16 max_rx_mtu;
UINT8 fcr_cfg_tries; /* Max number of negotiation attempts */
BOOLEAN peer_cfg_already_rejected; /* If mode rejected once, set to TRUE */
BOOLEAN 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 bypass_fcs;
BOOLEAN is_flushable; /* TRUE if channel is flushable */
UINT16 fixed_chnl_idle_tout; /* Idle timeout to use for the fixed channel */
UINT16 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 */
#define L2CAP_NUM_CHNL_PRIORITY 3 /* Total number of priority group (high, medium, low)*/
#define L2CAP_CHNL_PRIORITY_WEIGHT 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 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 num_ccb; /* number of channels in priority group */
UINT8 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
BOOLEAN in_use; /* TRUE when in use, FALSE when not */
tL2C_LINK_STATE link_state;
TIMER_LIST_ENT timer_entry; /* Timer list entry for timeout evt */
UINT16 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 */
TIMER_LIST_ENT info_timer_entry; /* Timer entry for info resp timeout evt */
BD_ADDR remote_bd_addr; /* The BD address of the remote */
UINT8 link_role; /* Master or slave */
UINT8 id;
UINT8 cur_echo_id; /* Current id value for echo request */
tL2CA_ECHO_RSP_CB *p_echo_rsp_cb; /* Echo response callback */
UINT16 idle_timeout; /* Idle timeout */
BOOLEAN is_bonding; /* True - link active only for bonding */
UINT16 link_flush_tout; /* Flush timeout used */
UINT16 link_xmit_quota; /* Num outstanding pkts allowed */
UINT16 sent_not_acked; /* Num packets sent but not acked */
BOOLEAN partial_segment_being_sent; /* Set TRUE when a partial segment */
/* is being sent. */
BOOLEAN w4_info_rsp; /* TRUE when info request is active */
UINT8 info_rx_bits; /* set 1 if received info type */
UINT32 peer_ext_fea; /* Peer's extended features mask */
list_t *link_xmit_data_q; /* Link transmit data buffer queue */
UINT16 ucd_mtu; /* peer MTU on UCD */
BUFFER_Q ucd_out_sec_pending_q; /* Security pending outgoing UCD packet */
BUFFER_Q ucd_in_sec_pending_q; /* Security pending incoming UCD packet */
BT_HDR *p_hcit_rcv_acl; /* Current HCIT ACL buf being rcvd */
UINT16 idle_timeout_sv; /* Save current Idle timeout */
tL2CA_NOCP_CB *p_nocp_cb; /* Num Cmpl pkts callback */
tL2C_CCB *p_fixed_ccbs[L2CAP_NUM_FIXED_CHNLS];
UINT16 disc_reason;
tBT_TRANSPORT transport;
tBLE_ADDR_TYPE ble_addr_type;
UINT16 tx_data_len; /* tx data length used in data length extension */
#define L2C_BLE_CONN_UPDATE_DISABLE 0x1 /* disable update connection parameters */
#define L2C_BLE_NEW_CONN_PARAM 0x2 /* new connection parameter to be set */
#define L2C_BLE_UPDATE_PENDING 0x4 /* waiting for connection update finished */
#define L2C_BLE_NOT_DEFAULT_PARAM 0x8 /* not using default connection parameters */
UINT8 conn_update_mask;
UINT16 min_interval; /* parameters as requested by peripheral */
UINT16 max_interval;
UINT16 latency;
UINT16 timeout;
/* each priority group is limited burst transmission */
/* round robin service for the same priority channels */
UINT8 rr_pri; /* current serving priority group */
} tL2C_LCB;
/* Define the L2CAP control structure
typedef struct
UINT8 l2cap_trace_level;
UINT16 controller_xmit_window; /* Total ACL window for all links */
UINT16 round_robin_quota; /* Round-robin link quota */
UINT16 round_robin_unacked; /* Round-robin unacked */
BOOLEAN check_round_robin; /* Do a round robin check */
BOOLEAN 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 */
UINT8 desire_role; /* desire to be master/slave when accepting a connection */
BOOLEAN disallow_switch; /* FALSE, to allow switch at create conn */
UINT16 num_lm_acl_bufs; /* # of ACL buffers on controller */
UINT16 idle_timeout; /* Idle timeout */
list_t *rcv_pending_q; /* Recv pending queue */
TIMER_LIST_ENT rcv_hold_tle; /* Timer list entry for rcv hold */
tL2C_LCB *p_cur_hcit_lcb; /* Current HCI Transport buffer */
UINT16 num_links_active; /* Number of links active */
UINT16 non_flushable_pbf; /* L2CAP_PKT_START_NON_FLUSHABLE if controller supports */
/* Otherwise, L2CAP_PKT_START */
BOOLEAN is_flush_active; /* TRUE if an HCI_Enhanced_Flush has been sent */
UINT32 test_info_resp; /* Conformance testing needs a dynamic response */
tL2CAP_FIXED_CHNL_REG fixed_reg[L2CAP_NUM_FIXED_CHNLS]; /* Reg info for fixed channels */
UINT16 num_ble_links_active; /* Number of LE links active */
BOOLEAN is_ble_connecting;
BD_ADDR ble_connecting_bda;
UINT16 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 num_lm_ble_bufs; /* # of ACL buffers on controller */
UINT16 ble_round_robin_quota; /* Round-robin link quota */
UINT16 ble_round_robin_unacked; /* Round-robin unacked */
BOOLEAN ble_check_round_robin; /* Do a round robin check */
tL2CA_ECHO_DATA_CB *p_echo_data_cb; /* Echo data callback */
UINT16 high_pri_min_xmit_quota; /* Minimum number of ACL credit for high priority link */
UINT16 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
BD_ADDR bd_addr; /* Remote BD address */
UINT8 status; /* Connection status */
UINT16 psm; /* PSM of the connection */
UINT16 l2cap_result; /* L2CAP result */
UINT16 l2cap_status; /* L2CAP status */
UINT16 remote_cid; /* Remote CID */
typedef void (tL2C_FCR_MGMT_EVT_HDLR) (UINT8, tL2C_CCB *);
/* 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)
#ifdef __cplusplus
extern "C" {
/* L2CAP global data
extern tL2C_CB l2cb;
extern tL2C_CB *l2c_cb_ptr;
#define l2cb (*l2c_cb_ptr)
/* Functions provided by l2c_main.c
void l2c_init(void);
void l2c_free(void);
extern void l2c_process_timeout (TIMER_LIST_ENT *p_tle);
extern UINT8 l2c_data_write (UINT16 cid, BT_HDR *p_data, UINT16 flag);
extern void l2c_rcv_acl_data (BT_HDR *p_msg);
extern void l2c_process_held_packets (BOOLEAN timed_out);
/* Functions provided by l2c_utils.c
extern tL2C_LCB *l2cu_allocate_lcb (BD_ADDR p_bd_addr, BOOLEAN is_bonding, tBT_TRANSPORT transport);
extern BOOLEAN l2cu_start_post_bond_timer (UINT16 handle);
extern void l2cu_release_lcb (tL2C_LCB *p_lcb);
extern tL2C_LCB *l2cu_find_lcb_by_bd_addr (BD_ADDR p_bd_addr, tBT_TRANSPORT transport);
extern tL2C_LCB *l2cu_find_lcb_by_handle (UINT16 handle);
extern void l2cu_update_lcb_4_bonding (BD_ADDR p_bd_addr, BOOLEAN is_bonding);
extern UINT8 l2cu_get_conn_role (tL2C_LCB *p_this_lcb);
extern BOOLEAN l2cu_set_acl_priority (BD_ADDR bd_addr, UINT8 priority, BOOLEAN 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 cid);
extern void l2cu_release_ccb (tL2C_CCB *p_ccb);
extern tL2C_CCB *l2cu_find_ccb_by_cid (tL2C_LCB *p_lcb, UINT16 local_cid);
extern tL2C_CCB *l2cu_find_ccb_by_remote_cid (tL2C_LCB *p_lcb, UINT16 remote_cid);
extern void l2cu_adj_id (tL2C_LCB *p_lcb, UINT8 adj_mask);
extern BOOLEAN l2c_is_cmd_rejected (UINT8 cmd_code, UINT8 id, tL2C_LCB *p_lcb);
extern void l2cu_send_peer_cmd_reject (tL2C_LCB *p_lcb, UINT16 reason,
UINT8 rem_id,UINT16 p1, UINT16 p2);
extern void l2cu_send_peer_connect_req (tL2C_CCB *p_ccb);
extern void l2cu_send_peer_connect_rsp (tL2C_CCB *p_ccb, UINT16 result, UINT16 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 *p_data, UINT16 data_len, UINT16 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 remote_id, UINT16 local_cid, UINT16 remote_cid);
extern void l2cu_send_peer_echo_req (tL2C_LCB *p_lcb, UINT8 *p_data, UINT16 data_len);
extern void l2cu_send_peer_echo_rsp (tL2C_LCB *p_lcb, UINT8 id, UINT8 *p_data, UINT16 data_len);
extern void l2cu_send_peer_info_rsp (tL2C_LCB *p_lcb, UINT8 id, UINT16 info_type);
extern void l2cu_reject_connection (tL2C_LCB *p_lcb, UINT16 remote_cid, UINT8 rem_id, UINT16 result);
extern void l2cu_send_peer_info_req (tL2C_LCB *p_lcb, UINT16 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_set_non_flushable_pbf(BOOLEAN);
extern void l2cu_send_peer_ble_par_req (tL2C_LCB *p_lcb, UINT16 min_int, UINT16 max_int, UINT16 latency, UINT16 timeout);
extern void l2cu_send_peer_ble_par_rsp (tL2C_LCB *p_lcb, UINT16 reason, UINT8 rem_id);
extern BOOLEAN l2cu_initialize_fixed_ccb (tL2C_LCB *p_lcb, UINT16 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);
/* Functions provided by l2c_ucd.c
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);
BOOLEAN l2c_ucd_check_pending_info_req(tL2C_CCB *p_ccb);
BOOLEAN 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);
BOOLEAN 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);
BOOLEAN l2c_ucd_check_rx_pkts(tL2C_LCB *p_lcb, BT_HDR *p_msg);
BOOLEAN l2c_ucd_process_event(tL2C_CCB *p_ccb, UINT16 event, void *p_data);
extern void l2cu_send_peer_ble_par_req (tL2C_LCB *p_lcb, UINT16 min_int, UINT16 max_int, UINT16 latency, UINT16 timeout);
extern void l2cu_send_peer_ble_par_rsp (tL2C_LCB *p_lcb, UINT16 reason, UINT8 rem_id);
extern BOOLEAN l2cu_initialize_fixed_ccb (tL2C_LCB *p_lcb, UINT16 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);
/* Functions provided for Broadcom Aware
extern BOOLEAN l2cu_check_feature_req (tL2C_LCB *p_lcb, UINT8 id, UINT8 *p_data, UINT16 data_len);
extern void l2cu_check_feature_rsp (tL2C_LCB *p_lcb, UINT8 id, UINT8 *p_data, UINT16 data_len);
extern void l2cu_send_feature_req (tL2C_CCB *p_ccb);
extern tL2C_RCB *l2cu_allocate_rcb (UINT16 psm);
extern tL2C_RCB *l2cu_find_rcb_by_psm (UINT16 psm);
extern void l2cu_release_rcb (tL2C_RCB *p_rcb);
extern UINT8 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 BOOLEAN l2cu_lcb_disconnecting (void);
extern BOOLEAN l2cu_create_conn (tL2C_LCB *p_lcb, tBT_TRANSPORT transport);
extern BOOLEAN 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 (BD_ADDR 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 l2c_link.c
extern BOOLEAN l2c_link_hci_conn_req (BD_ADDR bd_addr);
extern BOOLEAN l2c_link_hci_conn_comp (UINT8 status, UINT16 handle, BD_ADDR p_bda);
extern BOOLEAN l2c_link_hci_disc_comp (UINT16 handle, UINT8 reason);
extern BOOLEAN l2c_link_hci_qos_violation (UINT16 handle);
extern void l2c_link_timeout (tL2C_LCB *p_lcb);
extern void l2c_info_timeout (tL2C_LCB *p_lcb);
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 *p);
extern void l2c_link_process_num_completed_blocks (UINT8 controller_id, UINT8 *p, UINT16 evt_len);
extern void l2c_link_processs_num_bufs (UINT16 num_lm_acl_bufs);
extern UINT8 l2c_link_pkts_rcvd (UINT16 *num_pkts, UINT16 *handles);
extern void l2c_link_role_changed (BD_ADDR bd_addr, UINT8 new_role, UINT8 hci_status);
extern void l2c_link_sec_comp (BD_ADDR p_bda, tBT_TRANSPORT trasnport, void *p_ref_data, UINT8 status);
extern void l2c_link_segments_xmitted (BT_HDR *p_msg);
extern void l2c_pin_code_request (BD_ADDR bd_addr);
extern void l2c_link_adjust_chnl_allocation (void);
extern void l2c_link_processs_ble_num_bufs (UINT16 num_lm_acl_bufs);
extern BOOLEAN l2c_link_check_power_mode ( tL2C_LCB *p_lcb );
#define L2C_LINK_CHECK_POWER_MODE(x) l2c_link_check_power_mode ((x))
/* Used only for conformance testing */
extern void l2cu_set_info_rsp_mask (UINT32 mask);
/* Functions provided by l2c_csm.c
extern void l2c_csm_execute (tL2C_CCB *p_ccb, UINT16 event, void *p_data);
extern void l2c_enqueue_peer_data (tL2C_CCB *p_ccb, BT_HDR *p_buf);
/* Functions provided by l2c_fcr.c
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 function_code, UINT16 pf_bit);
extern BT_HDR *l2c_fcr_clone_buf (BT_HDR *p_buf, UINT16 new_offset, UINT16 no_of_bytes, UINT8 pool);
extern BOOLEAN l2c_fcr_is_flow_controlled (tL2C_CCB *p_ccb);
extern BT_HDR *l2c_fcr_get_next_xmit_sdu_seg (tL2C_CCB *p_ccb, UINT16 max_packet_length);
extern void l2c_fcr_start_timer (tL2C_CCB *p_ccb);
/* Configuration negotiation */
extern UINT8 l2c_fcr_chk_chan_modes (tL2C_CCB *p_ccb);
extern BOOLEAN 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 BOOLEAN l2c_fcr_renegotiate_chan(tL2C_CCB *p_ccb, tL2CAP_CFG_INFO *p_cfg);
extern UINT8 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 l2c_ble.c
extern BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb);
extern void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len);
extern void l2cble_conn_comp (UINT16 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type,
UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout);
extern BOOLEAN l2cble_init_direct_conn (tL2C_LCB *p_lcb);
extern void l2cble_notify_le_connection (BD_ADDR bda);
extern void l2c_ble_link_adjust_allocation (void);
extern void l2cble_process_conn_update_evt (UINT16 handle, UINT8 status);
extern void l2cble_process_rc_param_request_evt(UINT16 handle, UINT16 int_min, UINT16 int_max,
UINT16 latency, UINT16 timeout);
extern void l2cble_update_data_length(tL2C_LCB *p_lcb);
extern void l2cble_set_fixed_channel_tx_data_length(BD_ADDR remote_bda, UINT16 fix_cid,
UINT16 tx_mtu);
extern void l2cble_process_data_length_change_event(UINT16 handle, UINT16 tx_data_len,
UINT16 rx_data_len);
extern void l2cu_process_fixed_disc_cback (tL2C_LCB *p_lcb);
#ifdef __cplusplus