esp-idf/components/bt/host/bluedroid/stack/btm/btm_sec.c

/******************************************************************************
 *
 *  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:
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  This file contains functions for the Bluetooth Security Manager
 *
 ******************************************************************************/

//#define LOG_TAG "bt_btm_sec"

#include <stdarg.h>
#include <string.h>

#include "stack/bt_types.h"
#include "device/controller.h"
#include "stack/hcimsgs.h"
#include "stack/btu.h"
#include "btm_int.h"
#include "l2c_int.h"
#include "osi/fixed_queue.h"
#include "osi/alarm.h"
#include "stack/btm_ble_api.h"

#if (BT_USE_TRACES == TRUE && BT_TRACE_VERBOSE == FALSE)
/* needed for sprintf() */
#include <stdio.h>
#endif

#if BLE_INCLUDED == TRUE
#include "gatt_int.h"
#endif

#define BTM_SEC_MAX_COLLISION_DELAY     (5000)

#ifdef APPL_AUTH_WRITE_EXCEPTION
BOOLEAN (APPL_AUTH_WRITE_EXCEPTION)(BD_ADDR bd_addr);
#endif


/********************************************************************************
**              L O C A L    F U N C T I O N     P R O T O T Y P E S            *
*********************************************************************************/
#if (SMP_INCLUDED == TRUE)
static tBTM_SEC_SERV_REC *btm_sec_find_next_serv (tBTM_SEC_SERV_REC *p_cur);
static tBTM_SEC_SERV_REC *btm_sec_find_mx_serv (UINT8 is_originator, UINT16 psm,
        UINT32 mx_proto_id,
        UINT32 mx_chan_id);
static tBTM_STATUS btm_sec_execute_procedure (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN  btm_sec_start_get_name (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN  btm_sec_start_authentication (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN  btm_sec_start_encryption (tBTM_SEC_DEV_REC *p_dev_rec);
static void     btm_sec_collision_timeout (TIMER_LIST_ENT *p_tle);
static void     btm_restore_mode(void);
static void     btm_sec_pairing_timeout (TIMER_LIST_ENT *p_tle);
static tBTM_STATUS btm_sec_dd_create_conn (tBTM_SEC_DEV_REC *p_dev_rec);
static void     btm_sec_change_pairing_state (tBTM_PAIRING_STATE new_state);
#endif  ///SMP_INCLUDED == TRUE
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
static char     *btm_pair_state_descr (tBTM_PAIRING_STATE state);
#endif
#if (SMP_INCLUDED == TRUE)
static void     btm_sec_check_pending_reqs(void);
static BOOLEAN  btm_sec_queue_mx_request (BD_ADDR bd_addr,  UINT16 psm,  BOOLEAN is_orig,
        UINT32 mx_proto_id, UINT32 mx_chan_id,
        tBTM_SEC_CALLBACK *p_callback, void *p_ref_data);
static void     btm_sec_bond_cancel_complete (void);
static void     btm_send_link_key_notif (tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN  btm_sec_check_prefetch_pin (tBTM_SEC_DEV_REC  *p_dev_rec);
static UINT8    btm_sec_start_authorization (tBTM_SEC_DEV_REC *p_dev_rec);
#endif  ///SMP_INCLUDED == TRUE
BOOLEAN         btm_sec_are_all_trusted(UINT32 p_mask[]);
#if (SMP_INCLUDED == TRUE)
static tBTM_STATUS btm_sec_send_hci_disconnect (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 reason, UINT16 conn_handle);
#endif  ///SMP_INCLUDED == TRUE
UINT8           btm_sec_start_role_switch (tBTM_SEC_DEV_REC *p_dev_rec);
tBTM_SEC_DEV_REC *btm_sec_find_dev_by_sec_state (UINT8 state);

static BOOLEAN  btm_sec_set_security_level ( CONNECTION_TYPE conn_type, const char *p_name, UINT8 service_id,
        UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id,
        UINT32 mx_chan_id);
#if (SMP_INCLUDED == TRUE)
static BOOLEAN btm_dev_authenticated(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_dev_encrypted(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_dev_authorized(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_serv_trusted(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_SEC_SERV_REC *p_serv_rec);
static BOOLEAN btm_sec_is_serv_level0 (UINT16 psm);
static UINT16  btm_sec_set_serv_level4_flags (UINT16 cur_security, BOOLEAN is_originator);

static BOOLEAN btm_sec_queue_encrypt_request  (BD_ADDR bd_addr, tBT_TRANSPORT transport,
        tBTM_SEC_CALLBACK *p_callback, void *p_ref_data);
static void btm_sec_check_pending_enc_req (tBTM_SEC_DEV_REC  *p_dev_rec, tBT_TRANSPORT transport,
        UINT8 encr_enable);
static BOOLEAN btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC *p_dev_rec);
static BOOLEAN btm_sec_is_master(tBTM_SEC_DEV_REC *p_dev_rec);
#endif  ///SMP_INCLUDED == TRUE

/* TRUE - authenticated link key is possible */
static const BOOLEAN btm_sec_io_map [BTM_IO_CAP_MAX][BTM_IO_CAP_MAX] = {
    /*   OUT,    IO,     IN,     NONE */
    /* OUT  */ {FALSE,  FALSE,  TRUE,   FALSE},
    /* IO   */ {FALSE,  TRUE,   TRUE,   FALSE},
    /* IN   */ {TRUE,   TRUE,   TRUE,   FALSE},
    /* NONE */ {FALSE,  FALSE,  FALSE,  FALSE}
};
/*  BTM_IO_CAP_OUT      0   DisplayOnly */
/*  BTM_IO_CAP_IO       1   DisplayYesNo */
/*  BTM_IO_CAP_IN       2   KeyboardOnly */
/*  BTM_IO_CAP_NONE     3   NoInputNoOutput */

/*******************************************************************************
**
** Function         btm_dev_authenticated
**
** Description      check device is authenticated
**
** Returns          BOOLEAN TRUE or FALSE
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static BOOLEAN btm_dev_authenticated (tBTM_SEC_DEV_REC *p_dev_rec)
{
    if (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED) {
        return (TRUE);
    }
    return (FALSE);
}

/*******************************************************************************
**
** Function         btm_dev_encrypted
**
** Description      check device is encrypted
**
** Returns          BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN btm_dev_encrypted (tBTM_SEC_DEV_REC *p_dev_rec)
{
    if (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) {
        return (TRUE);
    }
    return (FALSE);
}

/*******************************************************************************
**
** Function         btm_dev_authorized
**
** Description      check device is authorized
**
** Returns          BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN btm_dev_authorized (tBTM_SEC_DEV_REC *p_dev_rec)
{
    if (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED) {
        return (TRUE);
    }
    return (FALSE);
}

/*******************************************************************************
**
** Function         btm_dev_16_digit_authenticated
**
** Description      check device is authenticated by using 16 digit pin or MITM
**
** Returns          BOOLEAN TRUE or FALSE
**
*******************************************************************************/
static BOOLEAN btm_dev_16_digit_authenticated(tBTM_SEC_DEV_REC *p_dev_rec)
{
    // BTM_SEC_16_DIGIT_PIN_AUTHED is set if MITM or 16 digit pin is used
    if (p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED) {
        return (TRUE);
    }
    return (FALSE);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_serv_trusted
**
** Description      check service is trusted
**
** Returns          BOOLEAN TRUE or FALSE
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static BOOLEAN btm_serv_trusted(tBTM_SEC_DEV_REC *p_dev_rec, tBTM_SEC_SERV_REC *p_serv_rec)
{
    if (BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask, p_serv_rec->service_id)) {
        return (TRUE);
    }
    return (FALSE);
}
#endif  ///SMP_INCLUDED == TRUE
/*******************************************************************************
**
** Function         BTM_SecRegister
**
** Description      Application manager calls this function to register for
**                  security services.  There can be one and only one application
**                  saving link keys.  BTM allows only first registration.
**
** Returns          TRUE if registered OK, else FALSE
**
*******************************************************************************/
BOOLEAN BTM_SecRegister(tBTM_APPL_INFO *p_cb_info)
{
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    BT_OCTET16      temp_value = {0};
#endif

    BTM_TRACE_EVENT("%s application registered\n", __func__);

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    BTM_TRACE_DEBUG("%s p_cb_info->p_le_callback == 0x%p\n", __func__, p_cb_info->p_le_callback);
    if (p_cb_info->p_le_callback) {
        BTM_TRACE_EVENT("%s SMP_Register( btm_proc_smp_cback )\n", __func__);
        SMP_Register(btm_proc_smp_cback);
        /* if no IR is loaded, need to regenerate all the keys */
        if (memcmp(btm_cb.devcb.id_keys.ir, &temp_value, sizeof(BT_OCTET16)) == 0) {
            btm_ble_reset_id();
        }
    } else {
        BTM_TRACE_WARNING("%s p_cb_info->p_le_callback == NULL\n", __func__);
    }
#endif

    btm_cb.api = *p_cb_info;
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    BTM_TRACE_DEBUG("%s btm_cb.api.p_le_callback = 0x%p\n", __func__, btm_cb.api.p_le_callback);
#endif
    BTM_TRACE_EVENT("%s application registered\n", __func__);
    return (TRUE);
}

/*******************************************************************************
**
** Function         BTM_SecRegisterLinkKeyNotificationCallback
**
** Description      Application manager calls this function to register for
**                  link key notification.  When there is nobody registered
**                  we should avoid changing link key
**
** Returns          TRUE if registered OK, else FALSE
**
*******************************************************************************/
BOOLEAN BTM_SecRegisterLinkKeyNotificationCallback (tBTM_LINK_KEY_CALLBACK *p_callback)
{
    btm_cb.api.p_link_key_callback = p_callback;
    return TRUE;
}

/*******************************************************************************
**
** Function         BTM_SecAddRmtNameNotifyCallback
**
** Description      Any profile can register to be notified when name of the
**                  remote device is resolved.
**
** Returns          TRUE if registered OK, else FALSE
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE) || (CLASSIC_BT_INCLUDED == TRUE)
BOOLEAN  BTM_SecAddRmtNameNotifyCallback (tBTM_RMT_NAME_CALLBACK *p_callback)
{
    int i;

    for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
        if (btm_cb.p_rmt_name_callback[i] == NULL) {
            btm_cb.p_rmt_name_callback[i] = p_callback;
            return (TRUE);
        }
    }
    return (FALSE);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_SecDeleteRmtNameNotifyCallback
**
** Description      Any profile can deregister notification when a new Link Key
**                  is generated per connection.
**
** Returns          TRUE if OK, else FALSE
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE) || (CLASSIC_BT_INCLUDED == TRUE)
BOOLEAN  BTM_SecDeleteRmtNameNotifyCallback (tBTM_RMT_NAME_CALLBACK *p_callback)
{
    int i;

    for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
        if (btm_cb.p_rmt_name_callback[i] == p_callback) {
            btm_cb.p_rmt_name_callback[i] = NULL;
            return (TRUE);
        }
    }
    return (FALSE);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_GetSecurityFlags
**
** Description      Get security flags for the device
**
** Returns          BOOLEAN TRUE or FALSE is device found
**
*******************************************************************************/
BOOLEAN BTM_GetSecurityFlags (BD_ADDR bd_addr, UINT8 *p_sec_flags)
{
    tBTM_SEC_DEV_REC *p_dev_rec;

    if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) {
        *p_sec_flags = (UINT8) p_dev_rec->sec_flags;
        return (TRUE);
    }
    BTM_TRACE_ERROR ("BTM_GetSecurityFlags false");
    return (FALSE);
}

/*******************************************************************************
**
** Function         BTM_GetSecurityFlagsByTransport
**
** Description      Get security flags for the device on a particular transport
**
** Returns          BOOLEAN TRUE or FALSE is device found
**
*******************************************************************************/
BOOLEAN BTM_GetSecurityFlagsByTransport (BD_ADDR bd_addr, UINT8 *p_sec_flags,
        tBT_TRANSPORT transport)
{
    tBTM_SEC_DEV_REC *p_dev_rec;

    if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) {
        if (transport == BT_TRANSPORT_BR_EDR) {
            *p_sec_flags = (UINT8) p_dev_rec->sec_flags;
        } else {
            *p_sec_flags = (UINT8) (p_dev_rec->sec_flags >> 8);
        }

        return (TRUE);
    }
    BTM_TRACE_ERROR ("BTM_GetSecurityFlags false\n");
    return (FALSE);
}

#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function         BTM_SetPinType
**
** Description      Set PIN type for the device.
**
** Returns          void
**
*******************************************************************************/
void BTM_SetPinType (UINT8 pin_type, PIN_CODE pin_code, UINT8 pin_code_len)
{
    BTM_TRACE_API ("BTM_SetPinType: pin type %d [variable-0, fixed-1], code %s, length %d\n",
                   pin_type, (char *) pin_code, pin_code_len);

    /* If device is not up security mode will be set as a part of startup */
    if ( (btm_cb.cfg.pin_type != pin_type)
            && controller_get_interface()->get_is_ready() ) {
        btsnd_hcic_write_pin_type (pin_type);
    }

    btm_cb.cfg.pin_type     = pin_type;
    btm_cb.cfg.pin_code_len = pin_code_len;
    memcpy (btm_cb.cfg.pin_code, pin_code, pin_code_len);
}
#endif  ///CLASSIC_BT_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_SetPairableMode
**
** Description      Enable or disable pairing
**
** Parameters       allow_pairing - (TRUE or FALSE) whether or not the device
**                      allows pairing.
**                  connect_only_paired - (TRUE or FALSE) whether or not to
**                      only allow paired devices to connect.
**
** Returns          void
**
*******************************************************************************/
void BTM_SetPairableMode (BOOLEAN allow_pairing, BOOLEAN connect_only_paired)
{
    BTM_TRACE_API ("BTM_SetPairableMode()  allow_pairing: %u   connect_only_paired: %u\n", allow_pairing, connect_only_paired);

    btm_cb.pairing_disabled    = !allow_pairing;
    btm_cb.connect_only_paired = connect_only_paired;
}

/*******************************************************************************
**
** Function         BTM_SetSecureConnectionsOnly
**
** Description      Enable or disable default treatment for Mode 4 Level 0 services
**
** Parameter        secure_connections_only_mode - (TRUE or FALSE) whether or not the device
**                  TRUE means that the device should treat Mode 4 Level 0 services as
**                  services of other levels. (Secure_connections_only_mode)
**                  FALSE means that the device should provide default treatment for
**                  Mode 4 Level 0 services.
**
** Returns          void
**
*******************************************************************************/
void BTM_SetSecureConnectionsOnly (BOOLEAN secure_connections_only_mode)
{
    BTM_TRACE_API("%s: Mode : %u\n", __FUNCTION__,
                  secure_connections_only_mode);

    btm_cb.devcb.secure_connections_only = secure_connections_only_mode;
    btm_cb.security_mode = BTM_SEC_MODE_SC;
}
#define BTM_NO_AVAIL_SEC_SERVICES   ((UINT16) 0xffff)

/*******************************************************************************
**
** Function         BTM_SetSecurityLevel
**
** Description      Register service security level with Security Manager
**
** Parameters:      is_originator - TRUE if originating the connection, FALSE if not
**                  p_name      - Name of the service relevant only if
**                                authorization will show this name to user. ignored
**                                if BTM_SEC_SERVICE_NAME_LEN is 0.
**                  service_id  - service ID for the service passed to authorization callback
**                  sec_level   - bit mask of the security features
**                  psm         - L2CAP PSM
**                  mx_proto_id - protocol ID of multiplexing proto below
**                  mx_chan_id  - channel ID of multiplexing proto below
**
** Returns          TRUE if registered OK, else FALSE
**
*******************************************************************************/
BOOLEAN BTM_SetSecurityLevel (BOOLEAN is_originator, const char *p_name, UINT8 service_id,
                              UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id,
                              UINT32 mx_chan_id)
{
#if (L2CAP_UCD_INCLUDED == TRUE)
    CONNECTION_TYPE conn_type;

    if (is_originator) {
        conn_type = CONN_ORIENT_ORIG;
    } else {
        conn_type = CONN_ORIENT_TERM;
    }

    return (btm_sec_set_security_level (conn_type, p_name, service_id,
                                        sec_level, psm, mx_proto_id, mx_chan_id));
#else
    return (btm_sec_set_security_level (is_originator, p_name, service_id,
                                        sec_level, psm, mx_proto_id, mx_chan_id));
#endif
}

/*******************************************************************************
**
** Function         btm_sec_set_security_level
**
** Description      Register service security level with Security Manager
**
** Parameters:      conn_type   - TRUE if originating the connection, FALSE if not
**                  p_name      - Name of the service relevant only if
**                                authorization will show this name to user. ignored
**                                if BTM_SEC_SERVICE_NAME_LEN is 0.
**                  service_id  - service ID for the service passed to authorization callback
**                  sec_level   - bit mask of the security features
**                  psm         - L2CAP PSM
**                  mx_proto_id - protocol ID of multiplexing proto below
**                  mx_chan_id  - channel ID of multiplexing proto below
**
** Returns          TRUE if registered OK, else FALSE
**
*******************************************************************************/
static BOOLEAN btm_sec_set_security_level (CONNECTION_TYPE conn_type, const char *p_name, UINT8 service_id,
        UINT16 sec_level, UINT16 psm, UINT32 mx_proto_id,
        UINT32 mx_chan_id)
{
#if (SMP_INCLUDED == TRUE)
    tBTM_SEC_SERV_REC   *p_srec;
    UINT16               index;
    UINT16               first_unused_record = BTM_NO_AVAIL_SEC_SERVICES;
    BOOLEAN              record_allocated = FALSE;
    BOOLEAN              is_originator;
#if (L2CAP_UCD_INCLUDED == TRUE)
    BOOLEAN              is_ucd;

    if (conn_type & CONNECTION_TYPE_ORIG_MASK) {
        is_originator = TRUE;
    } else {
        is_originator = FALSE;
    }

    if (conn_type & CONNECTION_TYPE_CONNLESS_MASK ) {
        is_ucd = TRUE;
    } else {
        is_ucd = FALSE;
    }
#else
    is_originator = conn_type;
#endif

    BTM_TRACE_API("%s : sec: 0x%x\n", __func__, sec_level);

    /* See if the record can be reused (same service name, psm, mx_proto_id,
       service_id, and mx_chan_id), or obtain the next unused record */

    p_srec = &btm_cb.sec_serv_rec[0];


    for (index = 0; index < BTM_SEC_MAX_SERVICE_RECORDS; index++, p_srec++) {
        /* Check if there is already a record for this service */
        if (p_srec->security_flags & BTM_SEC_IN_USE) {
#if BTM_SEC_SERVICE_NAME_LEN > 0
            if (p_srec->psm == psm                  &&
                    p_srec->mx_proto_id == mx_proto_id  &&
                    service_id == p_srec->service_id    &&
                    (!strncmp (p_name, (char *) p_srec->orig_service_name,
                               BTM_SEC_SERVICE_NAME_LEN) ||
                     !strncmp (p_name, (char *) p_srec->term_service_name,
                               BTM_SEC_SERVICE_NAME_LEN)))
#else
            if (p_srec->psm == psm                  &&
                    p_srec->mx_proto_id == mx_proto_id  &&
                    service_id == p_srec->service_id)
#endif
            {
                record_allocated = TRUE;
                break;
            }
        }
        /* Mark the first available service record */
        else if (!record_allocated) {
            memset (p_srec, 0, sizeof(tBTM_SEC_SERV_REC));
            record_allocated = TRUE;
            first_unused_record = index;
        }
    }

    if (!record_allocated) {
        BTM_TRACE_WARNING("BTM_SEC_REG: Out of Service Records (%d)\n",  BTM_SEC_MAX_SERVICE_RECORDS);
        return (record_allocated);
    }

    /* Process the request if service record is valid */
    /* If a duplicate service wasn't found, use the first available */
    if (index >= BTM_SEC_MAX_SERVICE_RECORDS) {
        index = first_unused_record;
        p_srec = &btm_cb.sec_serv_rec[index];
    }

    p_srec->psm         = psm;
    p_srec->service_id  = service_id;
    p_srec->mx_proto_id = mx_proto_id;

    if (is_originator) {
        p_srec->orig_mx_chan_id = mx_chan_id;
#if BTM_SEC_SERVICE_NAME_LEN > 0
        BCM_STRNCPY_S ((char *)p_srec->orig_service_name, p_name, BTM_SEC_SERVICE_NAME_LEN);
        p_srec->orig_service_name[BTM_SEC_SERVICE_NAME_LEN] = '\0';
#endif
        /* clear out the old setting, just in case it exists */
#if (L2CAP_UCD_INCLUDED == TRUE)
        if ( is_ucd ) {
            p_srec->ucd_security_flags &=
                ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT    | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM |
                  BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE);
        } else
#endif
        {
            p_srec->security_flags &=
                ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT    | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM |
                  BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE);
        }

        /* Parameter validation.  Originator should not set requirements for incoming connections */
        sec_level &= ~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHENTICATE
                       | BTM_SEC_IN_MITM | BTM_SEC_IN_MIN_16_DIGIT_PIN );

        if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
                btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
                btm_cb.security_mode == BTM_SEC_MODE_SC) {
            if (sec_level & BTM_SEC_OUT_AUTHENTICATE) {
                sec_level |= BTM_SEC_OUT_MITM;
            }
        }

        /* Make sure the authenticate bit is set, when encrypt bit is set */
        if (sec_level & BTM_SEC_OUT_ENCRYPT) {
            sec_level |= BTM_SEC_OUT_AUTHENTICATE;
        }

        /* outgoing connections usually set the security level right before
         * the connection is initiated.
         * set it to be the outgoing service */
#if (L2CAP_UCD_INCLUDED == TRUE)
        if ( is_ucd == FALSE )
#endif
        {
            btm_cb.p_out_serv = p_srec;
        }
    } else {
        p_srec->term_mx_chan_id = mx_chan_id;
#if BTM_SEC_SERVICE_NAME_LEN > 0
        BCM_STRNCPY_S ((char *)p_srec->term_service_name, p_name, BTM_SEC_SERVICE_NAME_LEN);
        p_srec->term_service_name[BTM_SEC_SERVICE_NAME_LEN] = '\0';
#endif
        /* clear out the old setting, just in case it exists */
#if (L2CAP_UCD_INCLUDED == TRUE)
        if ( is_ucd ) {
            p_srec->ucd_security_flags &=
                ~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT     | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM |
                  BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE
                  | BTM_SEC_IN_MIN_16_DIGIT_PIN);
        } else
#endif
        {
            p_srec->security_flags &=
                ~(BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT     | BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_MITM |
                  BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER | BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE
                  | BTM_SEC_IN_MIN_16_DIGIT_PIN);
        }

        /* Parameter validation.  Acceptor should not set requirements for outgoing connections */
        sec_level &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_OUT_ENCRYPT | BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_MITM);

        if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
                btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
                btm_cb.security_mode == BTM_SEC_MODE_SC) {
            if (sec_level & BTM_SEC_IN_AUTHENTICATE) {
                sec_level |= BTM_SEC_IN_MITM;
            }
        }

        /* Make sure the authenticate bit is set, when encrypt bit is set */
        if (sec_level & BTM_SEC_IN_ENCRYPT) {
            sec_level |= BTM_SEC_IN_AUTHENTICATE;
        }
    }

#if (L2CAP_UCD_INCLUDED == TRUE)
    if ( is_ucd ) {
        p_srec->security_flags     |= (UINT16)(BTM_SEC_IN_USE);
        p_srec->ucd_security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE);
    } else {
        p_srec->security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE);
    }

    BTM_TRACE_API("BTM_SEC_REG[%d]: id %d, conn_type 0x%x, psm 0x%04x, proto_id %d, chan_id %d\n",
                  index, service_id, conn_type, psm, mx_proto_id, mx_chan_id);

    BTM_TRACE_API("               : security_flags: 0x%04x, ucd_security_flags: 0x%04x\n",
                  p_srec->security_flags, p_srec->ucd_security_flags);

#if BTM_SEC_SERVICE_NAME_LEN > 0
    BTM_TRACE_API("               : service name [%s] (up to %d chars saved)\n",
                  p_name, BTM_SEC_SERVICE_NAME_LEN);
#endif
#else
    p_srec->security_flags |= (UINT16)(sec_level | BTM_SEC_IN_USE);

    BTM_TRACE_API("BTM_SEC_REG[%d]: id %d, is_orig %d, psm 0x%04x, proto_id %d, chan_id %d\n",
                  index, service_id, is_originator, psm, mx_proto_id, mx_chan_id);

#if BTM_SEC_SERVICE_NAME_LEN > 0
    BTM_TRACE_API("               : sec: 0x%x, service name [%s] (up to %d chars saved)\n",
                  p_srec->security_flags, p_name, BTM_SEC_SERVICE_NAME_LEN);
#endif
#endif


    return (record_allocated);
#else
    return FALSE;
#endif  ///SMP_INCLUDED == TRUE
}

/*******************************************************************************
**
** Function         BTM_SecClrService
**
** Description      Removes specified service record(s) from the security database.
**                  All service records with the specified name are removed.
**                  Typically used only by devices with limited RAM so that it can
**                  reuse an old security service record.
**
**                  Note: Unpredictable results may occur if a service is cleared
**                      that is still in use by an application/profile.
**
** Parameters       Service ID - Id of the service to remove. ('0' removes all service
**                          records (except SDP).
**
** Returns          Number of records that were freed.
**
*******************************************************************************/
#if (SDP_INCLUDED == TRUE)
UINT8 BTM_SecClrService (UINT8 service_id)
{
    tBTM_SEC_SERV_REC   *p_srec = &btm_cb.sec_serv_rec[0];
    UINT8   num_freed = 0;
    int     i;

    for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_srec++) {
        /* Delete services with specified name (if in use and not SDP) */
        if ((p_srec->security_flags & BTM_SEC_IN_USE) && (p_srec->psm != BT_PSM_SDP) &&
                (!service_id || (service_id == p_srec->service_id))) {
            BTM_TRACE_API("BTM_SEC_CLR[%d]: id %d\n", i, service_id);
            p_srec->security_flags = 0;
#if (L2CAP_UCD_INCLUDED == TRUE)
            p_srec->ucd_security_flags = 0;
#endif
            num_freed++;
        }
    }

    return (num_freed);
}
#endif  ///SDP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_clr_service_by_psm
**
** Description      Removes specified service record from the security database.
**                  All service records with the specified psm are removed.
**                  Typically used by L2CAP to free up the service record used
**                  by dynamic PSM clients when the channel is closed.
**                  The given psm must be a virtual psm.
**
** Parameters       Service ID - Id of the service to remove. ('0' removes all service
**                          records (except SDP).
**
** Returns          Number of records that were freed.
**
*******************************************************************************/
#if (SDP_INCLUDED== TRUE)
UINT8 btm_sec_clr_service_by_psm (UINT16 psm)
{
    tBTM_SEC_SERV_REC   *p_srec = &btm_cb.sec_serv_rec[0];
    UINT8   num_freed = 0;
    int     i;

    for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_srec++) {
        /* Delete services with specified name (if in use and not SDP) */
        if ((p_srec->security_flags & BTM_SEC_IN_USE) && (p_srec->psm == psm) ) {
            BTM_TRACE_API("BTM_SEC_CLR[%d]: id %d\n", i, p_srec->service_id);
            p_srec->security_flags = 0;
            num_freed++;
        }
    }
    BTM_TRACE_API("btm_sec_clr_service_by_psm psm:0x%x num_freed:%d\n", psm, num_freed);

    return (num_freed);
}
#endif  ///SDP_INCLUDED== TRUE

/*******************************************************************************
**
** Function         btm_sec_clr_temp_auth_service
**
** Description      Removes specified device record's temporary authorization
**                  flag from the security database.
**
** Parameters       Device address to be cleared
**
** Returns          void.
**
*******************************************************************************/
void btm_sec_clr_temp_auth_service (BD_ADDR bda)
{
    tBTM_SEC_DEV_REC   *p_dev_rec;

    if ((p_dev_rec = btm_find_dev (bda)) == NULL) {
        BTM_TRACE_WARNING ("btm_sec_clr_temp_auth_service() - no dev CB\n");
        return;
    }

    /* Reset the temporary authorized flag so that next time (untrusted) service is accessed autorization will take place */
    if (p_dev_rec->last_author_service_id != BTM_SEC_NO_LAST_SERVICE_ID && p_dev_rec->p_cur_service) {
        BTM_TRACE_DEBUG ("btm_sec_clr_auth_service_by_psm [clearing device: %02x:%02x:%02x:%02x:%02x:%02x]\n",
                         bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);

        p_dev_rec->last_author_service_id = BTM_SEC_NO_LAST_SERVICE_ID;
    }
}

/*******************************************************************************
**
** Function         BTM_PINCodeReply
**
** Description      This function is called after Security Manager submitted
**                  PIN code request to the UI.
**
** Parameters:      bd_addr      - Address of the device for which PIN was requested
**                  res          - result of the operation BTM_SUCCESS if success
**                  pin_len      - length in bytes of the PIN Code
**                  p_pin        - pointer to array with the PIN Code
**                  trusted_mask - bitwise OR of trusted services (array of UINT32)
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
#if (CLASSIC_BT_INCLUDED == TRUE)
void BTM_PINCodeReply (BD_ADDR bd_addr, UINT8 res, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
    tBTM_SEC_DEV_REC *p_dev_rec;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_API ("BTM_PINCodeReply(): PairState: %s   PairFlags: 0x%02x  PinLen:%d  Result:%d\n",
                   btm_pair_state_descr(btm_cb.pairing_state), btm_cb.pairing_flags, pin_len, res);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    /* If timeout already expired or has been canceled, ignore the reply */
    if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_PIN) {
        BTM_TRACE_WARNING ("BTM_PINCodeReply() - Wrong State: %d\n", btm_cb.pairing_state);
        return;
    }

    if (memcmp (bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) != 0) {
        BTM_TRACE_ERROR ("BTM_PINCodeReply() - Wrong BD Addr\n");
        return;
    }

    if ((p_dev_rec = btm_find_dev (bd_addr)) == NULL) {
        BTM_TRACE_ERROR ("BTM_PINCodeReply() - no dev CB\n");
        return;
    }

    if ( (pin_len > PIN_CODE_LEN) || (pin_len == 0) || (p_pin == NULL) ) {
        res = BTM_ILLEGAL_VALUE;
    }

    if (res != BTM_SUCCESS) {
        /* if peer started dd OR we started dd and pre-fetch pin was not used send negative reply */
        if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PEER_STARTED_DD) ||
                ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
                 (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE)) ) {
            /* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed event */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
            btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;

            btsnd_hcic_pin_code_neg_reply (bd_addr);
        } else {
            p_dev_rec->security_required = BTM_SEC_NONE;
            btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        }
        return;
    }
    if (trusted_mask) {
        BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask);
    }
    p_dev_rec->sec_flags   |= BTM_SEC_LINK_KEY_AUTHED;
    if (pin_len >= 16) {
        p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
    }

    if ( (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
            &&  (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE)
            &&  (btm_cb.security_mode_changed == FALSE) ) {
        /* This is start of the dedicated bonding if local device is 2.0 */
        btm_cb.pin_code_len = pin_len;
        p_dev_rec->pin_code_length = pin_len;
        memcpy (btm_cb.pin_code, p_pin, pin_len);

        btm_cb.security_mode_changed = TRUE;
#ifdef APPL_AUTH_WRITE_EXCEPTION
        if (!(APPL_AUTH_WRITE_EXCEPTION)(p_dev_rec->bd_addr))
#endif
        {
            btsnd_hcic_write_auth_enable (TRUE);
        }

        btm_cb.acl_disc_reason = 0xff ;

        /* if we rejected incoming connection request, we have to wait HCI_Connection_Complete event */
        /*  before originating  */
        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) {
            BTM_TRACE_WARNING ("BTM_PINCodeReply(): waiting HCI_Connection_Complete after rejected incoming connection\n");
            /* we change state little bit early so btm_sec_connected() will originate connection */
            /*   when existing ACL link is down completely */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ);
        }
        /* if we already accepted incoming connection from pairing device */
        else if (p_dev_rec->sm4 & BTM_SM4_CONN_PEND) {
            BTM_TRACE_WARNING ("BTM_PINCodeReply(): link is connecting so wait pin code request from peer\n");
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ);
        } else if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) {
            btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
            p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_AUTHED;

            if (btm_cb.api.p_auth_complete_callback) {
                (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,  p_dev_rec->dev_class,
                                                        p_dev_rec->sec_bd_name, HCI_ERR_AUTH_FAILURE);
            }
        }
        return;
    }

    btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
    btm_cb.acl_disc_reason = HCI_SUCCESS;

#ifdef PORCHE_PAIRING_CONFLICT
    BTM_TRACE_EVENT("BTM_PINCodeReply(): Saving pin_len: %d btm_cb.pin_code_len: %d\n", pin_len, btm_cb.pin_code_len);
    /* if this was not pre-fetched, save the PIN */
    if (btm_cb.pin_code_len == 0) {
        memcpy (btm_cb.pin_code, p_pin, pin_len);
    }
    btm_cb.pin_code_len_saved = pin_len;
#endif
    btsnd_hcic_pin_code_req_reply (bd_addr, pin_len, p_pin);
}
#endif  ///CLASSIC_BT_INCLUDED == TRUE
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_sec_bond_by_transport
**
** Description      this is the bond function that will start either SSP or SMP.
**
** Parameters:      bd_addr      - Address of the device to bond
**                  pin_len      - length in bytes of the PIN Code
**                  p_pin        - pointer to array with the PIN Code
**                  trusted_mask - bitwise OR of trusted services (array of UINT32)
**
**  Note: After 2.1 parameters are not used and preserved here not to change API
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
tBTM_STATUS btm_sec_bond_by_transport (BD_ADDR bd_addr, tBT_TRANSPORT transport,
                                       UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
    tBTM_SEC_DEV_REC *p_dev_rec;
    tBTM_STATUS      status;
#if (!CONFIG_BT_STACK_NO_LOG)
    UINT8            *p_features;
#endif
    UINT8            ii;
    tACL_CONN        *p = btm_bda_to_acl(bd_addr, transport);
    BTM_TRACE_API ("btm_sec_bond_by_transport BDA: %02x:%02x:%02x:%02x:%02x:%02x\n",
                   bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5]);

    BTM_TRACE_DEBUG("btm_sec_bond_by_transport: Transport used %d\n" , transport);


    /* Other security process is in progress */
    if (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) {
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_ERROR ("BTM_SecBond: already busy in state: %s\n", btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        return (BTM_WRONG_MODE);
    }

    if ((p_dev_rec = btm_find_or_alloc_dev (bd_addr)) == NULL) {
        return (BTM_NO_RESOURCES);
    }

    BTM_TRACE_DEBUG ("before update sec_flags=0x%x\n", p_dev_rec->sec_flags);

    /* Finished if connection is active and already paired */
    if ( ((p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE) && transport == BT_TRANSPORT_BR_EDR
            &&  (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))
#if (BLE_INCLUDED == TRUE)
            || ((p_dev_rec->ble_hci_handle != BTM_SEC_INVALID_HANDLE) && transport == BT_TRANSPORT_LE
                &&  (p_dev_rec->sec_flags & BTM_SEC_LE_AUTHENTICATED))
#endif

       ) {
        BTM_TRACE_WARNING("BTM_SecBond -> Already Paired\n");
        return (BTM_SUCCESS);
    }

    /* Tell controller to get rid of the link key if it has one stored */
    if ((BTM_DeleteStoredLinkKey (bd_addr, NULL)) != BTM_SUCCESS) {
        return (BTM_NO_RESOURCES);
    }

#if (CLASSIC_BT_INCLUDED == TRUE)
    /* Save the PIN code if we got a valid one */
    if (p_pin && (pin_len <= PIN_CODE_LEN) && (pin_len != 0)) {
        btm_cb.pin_code_len = pin_len;
        p_dev_rec->pin_code_length = pin_len;
        memcpy (btm_cb.pin_code, p_pin, PIN_CODE_LEN);
    }
#endif  ///CLASSIC_BT_INCLUDED == TRUE

    memcpy (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN);

    btm_cb.pairing_flags = BTM_PAIR_FLAGS_WE_STARTED_DD;

    p_dev_rec->security_required = BTM_SEC_OUT_AUTHENTICATE;
    p_dev_rec->is_originator     = TRUE;
    if (trusted_mask) {
        BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask);
    }

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    if (transport == BT_TRANSPORT_LE) {
        btm_ble_init_pseudo_addr (p_dev_rec, bd_addr);
        p_dev_rec->sec_flags &= ~ BTM_SEC_LE_MASK;

        if (SMP_Pair(bd_addr) == SMP_STARTED) {
            btm_cb.pairing_flags |= BTM_PAIR_FLAGS_LE_ACTIVE;
            p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING;
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
            return BTM_CMD_STARTED;
        }

        btm_cb.pairing_flags = 0;
        return (BTM_NO_RESOURCES);
    }
#endif

    p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED
                              | BTM_SEC_ROLE_SWITCHED  | BTM_SEC_LINK_KEY_AUTHED);


    BTM_TRACE_DEBUG ("after update sec_flags=0x%x\n", p_dev_rec->sec_flags);

#if (CLASSIC_BT_INCLUDED == TRUE)
    if (!controller_get_interface()->supports_simple_pairing()) {
        /* The special case when we authenticate keyboard.  Set pin type to fixed */
        /* It would be probably better to do it from the application, but it is */
        /* complicated */
        if (((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) == BTM_COD_MAJOR_PERIPHERAL)
                && (p_dev_rec->dev_class[2] & BTM_COD_MINOR_KEYBOARD)
                && (btm_cb.cfg.pin_type != HCI_PIN_TYPE_FIXED)) {
            btm_cb.pin_type_changed = TRUE;
            btsnd_hcic_write_pin_type (HCI_PIN_TYPE_FIXED);
        }
    }
#endif  ///CLASSIC_BT_INCLUDED == TRUE

    for (ii = 0; ii <= HCI_EXT_FEATURES_PAGE_MAX; ii++) {
#if (!CONFIG_BT_STACK_NO_LOG)
        p_features = p_dev_rec->features[ii];
#endif
        BTM_TRACE_EVENT("  remote_features page[%1d] = %02x-%02x-%02x-%02x\n",
                        ii, p_features[0], p_features[1], p_features[2], p_features[3]);
        BTM_TRACE_EVENT("                              %02x-%02x-%02x-%02x\n",
                        p_features[4], p_features[5], p_features[6], p_features[7]);
    }

    BTM_TRACE_EVENT ("BTM_SecBond: Remote sm4: 0x%x  HCI Handle: 0x%04x\n", p_dev_rec->sm4, p_dev_rec->hci_handle);

#if BTM_SEC_FORCE_RNR_FOR_DBOND == TRUE
    p_dev_rec->sec_flags &= ~BTM_SEC_NAME_KNOWN;
#endif

    /* If connection already exists... */
    if (p && p->hci_handle != BTM_SEC_INVALID_HANDLE) {
        if (!btm_sec_start_authentication (p_dev_rec)) {
            return (BTM_NO_RESOURCES);
        }

        btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ);

        /* Mark lcb as bonding */
        l2cu_update_lcb_4_bonding (bd_addr, TRUE);
        return (BTM_CMD_STARTED);
    }

    BTM_TRACE_DEBUG ("sec mode: %d sm4:x%x\n", btm_cb.security_mode, p_dev_rec->sm4);
    if (!controller_get_interface()->supports_simple_pairing()
            || (p_dev_rec->sm4 == BTM_SM4_KNOWN)) {
        if ( btm_sec_check_prefetch_pin (p_dev_rec) ) {
            return (BTM_CMD_STARTED);
        }
    }
    if ((btm_cb.security_mode == BTM_SEC_MODE_SP ||
            btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
            btm_cb.security_mode == BTM_SEC_MODE_SC) &&
            BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
        /* local is 2.1 and peer is unknown */
        if ((p_dev_rec->sm4 & BTM_SM4_CONN_PEND) == 0) {
            /* we are not accepting connection request from peer
             * -> RNR (to learn if peer is 2.1)
             * RNR when no ACL causes HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME);
            BTM_ReadRemoteDeviceName(bd_addr, NULL, BT_TRANSPORT_BR_EDR);
        } else {
            /* We are accepting connection request from peer */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ);
        }
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_DEBUG ("State:%s sm4: 0x%x sec_state:%d\n",
                         btm_pair_state_descr (btm_cb.pairing_state), p_dev_rec->sm4, p_dev_rec->sec_state);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        return BTM_CMD_STARTED;
    }

    /* both local and peer are 2.1  */
    status = btm_sec_dd_create_conn(p_dev_rec);

    if (status != BTM_CMD_STARTED) {
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
    }

    return status;
}

/*******************************************************************************
**
** Function         BTM_SecBondByTransport
**
** Description      This function is called to perform bonding with peer device.
**                  If the connection is already up, but not secure, pairing
**                  is attempted.  If already paired BTM_SUCCESS is returned.
**
** Parameters:      bd_addr      - Address of the device to bond
**                  transport    - doing SSP over BR/EDR or SMP over LE
**                  pin_len      - length in bytes of the PIN Code
**                  p_pin        - pointer to array with the PIN Code
**                  trusted_mask - bitwise OR of trusted services (array of UINT32)
**
**  Note: After 2.1 parameters are not used and preserved here not to change API
*******************************************************************************/
tBTM_STATUS BTM_SecBondByTransport (BD_ADDR bd_addr, tBT_TRANSPORT transport,
                                    UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
#if (BLE_INCLUDED == TRUE)
    tBT_DEVICE_TYPE     dev_type;
    tBLE_ADDR_TYPE      addr_type = 0;

    BTM_ReadDevInfo(bd_addr, &dev_type, &addr_type);
    /* LE device, do SMP pairing */
    if ((transport == BT_TRANSPORT_LE && (dev_type & BT_DEVICE_TYPE_BLE) == 0) ||
            (transport == BT_TRANSPORT_BR_EDR && (dev_type & BT_DEVICE_TYPE_BREDR) == 0)) {
        return BTM_ILLEGAL_ACTION;
    }
#endif  ///BLE_INCLUDED == TRUE

    return btm_sec_bond_by_transport(bd_addr, transport, pin_len, p_pin, trusted_mask);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_SecBond
**
** Description      This function is called to perform bonding with peer device.
**                  If the connection is already up, but not secure, pairing
**                  is attempted.  If already paired BTM_SUCCESS is returned.
**
** Parameters:      bd_addr      - Address of the device to bond
**                  pin_len      - length in bytes of the PIN Code
**                  p_pin        - pointer to array with the PIN Code
**                  trusted_mask - bitwise OR of trusted services (array of UINT32)
**
**  Note: After 2.1 parameters are not used and preserved here not to change API
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
tBTM_STATUS BTM_SecBond (BD_ADDR bd_addr, UINT8 pin_len, UINT8 *p_pin, UINT32 trusted_mask[])
{
    tBT_TRANSPORT   transport = BT_TRANSPORT_BR_EDR;
#if (BLE_INCLUDED == TRUE)
    if (BTM_UseLeLink(bd_addr)) {
        transport = BT_TRANSPORT_LE;
    }
#endif  ///BLE_INCLUDED == TRUE
    return btm_sec_bond_by_transport(bd_addr, transport, pin_len, p_pin, trusted_mask);
}
/*******************************************************************************
**
** Function         BTM_SecBondCancel
**
** Description      This function is called to cancel ongoing bonding process
**                  with peer device.
**
** Parameters:      bd_addr      - Address of the peer device
**                         transport    - FALSE for BR/EDR link; TRUE for LE link
**
*******************************************************************************/
tBTM_STATUS BTM_SecBondCancel (BD_ADDR bd_addr)
{
    tBTM_SEC_DEV_REC *p_dev_rec;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_API ("BTM_SecBondCancel()  State: %s flags:0x%x\n",
                   btm_pair_state_descr (btm_cb.pairing_state), btm_cb.pairing_flags);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    if (((p_dev_rec = btm_find_dev (bd_addr)) == NULL)
            ||  (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) {
        return BTM_UNKNOWN_ADDR;
    }

#if SMP_INCLUDED == TRUE
    if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_LE_ACTIVE) {
        if (p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING) {
            BTM_TRACE_DEBUG ("Cancel LE pairing\n");
            if (SMP_PairCancel(bd_addr)) {
                return BTM_CMD_STARTED;
            }
        }
        return BTM_WRONG_MODE;
    }

#endif
    BTM_TRACE_DEBUG ("hci_handle:0x%x sec_state:%d\n", p_dev_rec->hci_handle, p_dev_rec->sec_state );
    if (BTM_PAIR_STATE_WAIT_LOCAL_PIN == btm_cb.pairing_state &&
            BTM_PAIR_FLAGS_WE_STARTED_DD & btm_cb.pairing_flags) {
        /* pre-fetching pin for dedicated bonding */
        btm_sec_bond_cancel_complete();
        return BTM_SUCCESS;
    }

    /* If this BDA is in a bonding procedure */
    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            &&  (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)) {
        /* If the HCI link is up */
        if (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE) {
            /* If some other thread disconnecting, we do not send second command */
            if ((p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING) ||
                    (p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING_BOTH)) {
                return (BTM_CMD_STARTED);
            }

            /* If the HCI link was set up by Bonding process */
            if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) {
                return btm_sec_send_hci_disconnect(p_dev_rec, HCI_ERR_PEER_USER, p_dev_rec->hci_handle);
            } else {
                l2cu_update_lcb_4_bonding(bd_addr, FALSE);
            }

            return BTM_NOT_AUTHORIZED;
        } else { /*HCI link is not up */
            /* If the HCI link creation was started by Bonding process */
            if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) {
                if (btsnd_hcic_create_conn_cancel(bd_addr)) {
                    return BTM_CMD_STARTED;
                }

                return BTM_NO_RESOURCES;
            }
            if (btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME) {
                BTM_CancelRemoteDeviceName();
                btm_cb.pairing_flags |= BTM_PAIR_FLAGS_WE_CANCEL_DD;
                return BTM_CMD_STARTED;
            }
            return BTM_NOT_AUTHORIZED;
        }
    }
    return BTM_WRONG_MODE;
}


/*******************************************************************************
**
** Function         BTM_SecGetDeviceLinkKey
**
** Description      This function is called to obtain link key for the device
**                  it returns BTM_SUCCESS if link key is available, or
**                  BTM_UNKNOWN_ADDR if Security Manager does not know about
**                  the device or device record does not contain link key info
**
** Parameters:      bd_addr      - Address of the device
**                  link_key     - Link Key is copied into this array
**
*******************************************************************************/
tBTM_STATUS BTM_SecGetDeviceLinkKey (BD_ADDR bd_addr, LINK_KEY link_key)
{
    tBTM_SEC_DEV_REC *p_dev_rec;

    if (((p_dev_rec = btm_find_dev (bd_addr)) != NULL)
            && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) {
        memcpy (link_key, p_dev_rec->link_key, LINK_KEY_LEN);
        return (BTM_SUCCESS);
    }
    return (BTM_UNKNOWN_ADDR);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_SecGetDeviceLinkKeyType
**
** Description      This function is called to obtain link key type for the
**                  device.
**                  it returns BTM_SUCCESS if link key is available, or
**                  BTM_UNKNOWN_ADDR if Security Manager does not know about
**                  the device or device record does not contain link key info
**
** Returns          BTM_LKEY_TYPE_IGNORE if link key is unknown, link type
**                  otherwise.
**
*******************************************************************************/
tBTM_LINK_KEY_TYPE BTM_SecGetDeviceLinkKeyType (BD_ADDR bd_addr)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);

    if ((p_dev_rec != NULL) && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) {
        return p_dev_rec->link_key_type;
    }
    return BTM_LKEY_TYPE_IGNORE;
}

/*******************************************************************************
**
** Function         BTM_SetEncryption
**
** Description      This function is called to ensure that connection is
**                  encrypted.  Should be called only on an open connection.
**                  Typically only needed for connections that first want to
**                  bring up unencrypted links, then later encrypt them.
**
** Parameters:      bd_addr       - Address of the peer device
**                  p_callback    - Pointer to callback function called if
**                                  this function returns PENDING after required
**                                  procedures are completed.  Can be set to NULL
**                                  if status is not desired.
**                  p_ref_data    - pointer to any data the caller wishes to receive
**                                  in the callback function upon completion.
*                                   can be set to NULL if not used.
**                  transport  -    TRUE to encryption the link over LE transport
**                                  or FALSE for BR/EDR transport
**
** Returns          BTM_SUCCESS   - already encrypted
**                  BTM_PENDING   - command will be returned in the callback
**                  BTM_WRONG_MODE- connection not up.
**                  BTM_BUSY      - security procedures are currently active
**                  BTM_MODE_UNSUPPORTED - if security manager not linked in.
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
tBTM_STATUS BTM_SetEncryption (BD_ADDR bd_addr, tBT_TRANSPORT transport, tBTM_SEC_CBACK *p_callback,
                               void *p_ref_data)
{
    tBTM_STATUS rc = 0;

    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev (bd_addr);
    if (!p_dev_rec ||
            (transport == BT_TRANSPORT_BR_EDR && p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE)
#if BLE_INCLUDED == TRUE
            || (transport == BT_TRANSPORT_LE && p_dev_rec->ble_hci_handle == BTM_SEC_INVALID_HANDLE)
#endif
       ) {
        /* Connection should be up and runnning */
        BTM_TRACE_WARNING ("Security Manager: BTM_SetEncryption not connected\n");

        if (p_callback) {
            (*p_callback) (bd_addr, transport, p_ref_data, BTM_WRONG_MODE);
        }

        return (BTM_WRONG_MODE);
    }

    if ((transport == BT_TRANSPORT_BR_EDR &&
            (p_dev_rec->sec_flags &  BTM_SEC_ENCRYPTED))
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
            || (transport == BT_TRANSPORT_LE &&
                (p_dev_rec->sec_flags & BTM_SEC_LE_ENCRYPTED))
#endif
       ) {
        BTM_TRACE_EVENT ("Security Manager: BTM_SetEncryption already encrypted\n");

        if (p_callback) {
            (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS);
        }

        return (BTM_SUCCESS);
    }
    p_dev_rec->enc_init_by_we = TRUE;
    /* enqueue security request if security is active */
    if (p_dev_rec->p_callback || (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE)) {
        BTM_TRACE_WARNING ("Security Manager: BTM_SetEncryption busy, enqueue request\n");

        if (btm_sec_queue_encrypt_request(bd_addr, transport, p_callback, p_ref_data)) {
            return BTM_CMD_STARTED;
        } else {
            if (p_callback) {
                (*p_callback) (bd_addr, transport, p_ref_data, BTM_NO_RESOURCES);
            }
            return BTM_NO_RESOURCES;
        }
    }

    p_dev_rec->p_callback        = p_callback;
    p_dev_rec->p_ref_data        = p_ref_data;
    p_dev_rec->security_required |= (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT);
    p_dev_rec->is_originator     = FALSE;

    BTM_TRACE_API ("Security Manager: BTM_SetEncryption Handle:%d State:%d Flags:0x%x Required:0x%x\n",
                   p_dev_rec->hci_handle, p_dev_rec->sec_state, p_dev_rec->sec_flags,
                   p_dev_rec->security_required);

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    if (transport == BT_TRANSPORT_LE) {
        tACL_CONN *p = btm_bda_to_acl(bd_addr, transport);
        if (p) {
            rc = btm_ble_set_encryption(bd_addr, p_ref_data, p->link_role);
        } else {
            rc = BTM_WRONG_MODE;
            BTM_TRACE_WARNING("%s: cannot call btm_ble_set_encryption, p is NULL\n", __FUNCTION__);
        }
    } else
#endif
    {
        rc = btm_sec_execute_procedure (p_dev_rec);
    }

    if (rc != BTM_CMD_STARTED && rc != BTM_BUSY) {
        if (p_callback) {
            p_dev_rec->p_callback = NULL;
            (*p_callback) (bd_addr, transport, p_dev_rec->p_ref_data, rc);
        }
    }

    return (rc);
}

/*******************************************************************************
 * disconnect the ACL link, if it's not done yet.
*******************************************************************************/
static tBTM_STATUS btm_sec_send_hci_disconnect (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 reason, UINT16 conn_handle)
{
    UINT8       old_state = p_dev_rec->sec_state;
    tBTM_STATUS status = BTM_CMD_STARTED;

    BTM_TRACE_EVENT ("btm_sec_send_hci_disconnect:  handle:0x%x, reason=0x%x\n",
                     conn_handle, reason);

    /* send HCI_Disconnect on a transport only once */
    switch (old_state) {
    case BTM_SEC_STATE_DISCONNECTING:
        if (conn_handle == p_dev_rec->hci_handle) {
            return status;
        }

        p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH;
        break;

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    case BTM_SEC_STATE_DISCONNECTING_BLE:
        if (conn_handle == p_dev_rec->ble_hci_handle) {
            return status;
        }

        p_dev_rec->sec_state = BTM_SEC_STATE_DISCONNECTING_BOTH;
        break;

    case BTM_SEC_STATE_DISCONNECTING_BOTH:
        return status;
#endif

    default:
        p_dev_rec->sec_state = (conn_handle == p_dev_rec->hci_handle) ?
                               BTM_SEC_STATE_DISCONNECTING : BTM_SEC_STATE_DISCONNECTING_BLE;

        break;
    }

    /* If a role switch is in progress, delay the HCI Disconnect to avoid controller problem */
    if (p_dev_rec->rs_disc_pending == BTM_SEC_RS_PENDING && p_dev_rec->hci_handle == conn_handle) {
        BTM_TRACE_DEBUG("RS in progress - Set DISC Pending flag in btm_sec_send_hci_disconnect to delay disconnect\n");
        p_dev_rec->rs_disc_pending = BTM_SEC_DISC_PENDING;
        status = BTM_SUCCESS;
    }
    /* Tear down the HCI link */
    else if (!btsnd_hcic_disconnect (conn_handle, reason)) {
        /* could not send disconnect. restore old state */
        p_dev_rec->sec_state = old_state;
        status = BTM_NO_RESOURCES;
    }

    return status;
}
#endif  ///SMP_INCLUDED == TRUE
/*******************************************************************************
**
** Function         BTM_ConfirmReqReply
**
** Description      This function is called to confirm the numeric value for
**                  Simple Pairing in response to BTM_SP_CFM_REQ_EVT
**
** Parameters:      res           - result of the operation BTM_SUCCESS if success
**                  bd_addr       - Address of the peer device
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void BTM_ConfirmReqReply(tBTM_STATUS res, BD_ADDR bd_addr)
{
    tBTM_SEC_DEV_REC *p_dev_rec;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("BTM_ConfirmReqReply() State: %s  Res: %u",
                     btm_pair_state_descr(btm_cb.pairing_state), res);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    /* If timeout already expired or has been canceled, ignore the reply */
    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM)
            ||  (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) {
        return;
    }

    btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);

    if ( (res == BTM_SUCCESS) || (res == BTM_SUCCESS_NO_SECURITY) ) {
        btm_cb.acl_disc_reason = HCI_SUCCESS;

        if (res == BTM_SUCCESS) {
            if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL) {
                p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_AUTHED;
                p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
            }
        }

        btsnd_hcic_user_conf_reply (bd_addr, TRUE);
    } else {
        /* Report authentication failed event from state BTM_PAIR_STATE_WAIT_AUTH_COMPLETE */
        btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
        btsnd_hcic_user_conf_reply (bd_addr, FALSE);
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_PasskeyReqReply
**
** Description      This function is called to provide the passkey for
**                  Simple Pairing in response to BTM_SP_KEY_REQ_EVT
**
** Parameters:      res     - result of the operation BTM_SUCCESS if success
**                  bd_addr - Address of the peer device
**                  passkey - numeric value in the range of
**                  BTM_MIN_PASSKEY_VAL(0) - BTM_MAX_PASSKEY_VAL(999999(0xF423F)).
**
*******************************************************************************/
#if (BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE)
void BTM_PasskeyReqReply(tBTM_STATUS res, BD_ADDR bd_addr, UINT32 passkey)
{
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_API ("BTM_PasskeyReqReply: State: %s  res:%d\n",
                   btm_pair_state_descr(btm_cb.pairing_state), res);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    if ( (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE)
            ||  (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) {
        return;
    }

    /* If timeout already expired or has been canceled, ignore the reply */
    if ( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_AUTH_COMPLETE) && (res != BTM_SUCCESS) ) {
        tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);
        if (p_dev_rec != NULL) {
            btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;

            if (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE) {
                btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle);
            } else {
                BTM_SecBondCancel(bd_addr);
            }

            p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_AUTHED | BTM_SEC_LINK_KEY_KNOWN);

            btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
            return;
        }
    } else if (btm_cb.pairing_state != BTM_PAIR_STATE_KEY_ENTRY) {
        return;
    }

    if (passkey > BTM_MAX_PASSKEY_VAL) {
        res = BTM_ILLEGAL_VALUE;
    }

    btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);

    if (res != BTM_SUCCESS) {
        /* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed event */
        btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
        btsnd_hcic_user_passkey_neg_reply (bd_addr);
    } else {
        btm_cb.acl_disc_reason = HCI_SUCCESS;
        btsnd_hcic_user_passkey_reply (bd_addr, passkey);
    }
}
#endif  ///BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_SendKeypressNotif
**
** Description      This function is used during the passkey entry model
**                  by a device with KeyboardOnly IO capabilities
**                  (very likely to be a HID Device).
**                  It is called by a HID Device to inform the remote device when
**                  a key has been entered or erased.
**
** Parameters:      bd_addr - Address of the peer device
**                  type - notification type
**
*******************************************************************************/
#if (BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE)
void BTM_SendKeypressNotif(BD_ADDR bd_addr, tBTM_SP_KEY_TYPE type)
{
    /* This API only make sense between PASSKEY_REQ and SP complete */
    if (btm_cb.pairing_state == BTM_PAIR_STATE_KEY_ENTRY) {
        btsnd_hcic_send_keypress_notif (bd_addr, type);
    }
}
#endif  ///BT_SSP_INCLUDED == TRUE && SMP_INCLUDED == TRUE

#if BTM_OOB_INCLUDED == TRUE && SMP_INCLUDED == TRUE
/*******************************************************************************
**
** Function         BTM_IoCapRsp
**
** Description      This function is called in response to BTM_SP_IO_REQ_EVT
**                  When the event data io_req.oob_data is set to BTM_OOB_UNKNOWN
**                  by the tBTM_SP_CALLBACK implementation, this function is
**                  called to provide the actual response
**
** Parameters:      bd_addr - Address of the peer device
**                  io_cap  - The IO capability of local device.
**                  oob     - BTM_OOB_NONE or BTM_OOB_PRESENT.
**                  auth_req- MITM protection required or not.
**
*******************************************************************************/
void BTM_IoCapRsp(BD_ADDR bd_addr, tBTM_IO_CAP io_cap, tBTM_OOB_DATA oob, tBTM_AUTH_REQ auth_req)
{
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("BTM_IoCapRsp: state: %s  oob: %d io_cap: %d\n",
                     btm_pair_state_descr(btm_cb.pairing_state), oob, io_cap);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS)
            ||  (memcmp (btm_cb.pairing_bda, bd_addr, BD_ADDR_LEN) != 0) ) {
        return;
    }

    if (oob < BTM_OOB_UNKNOWN && io_cap < BTM_IO_CAP_MAX) {
        btm_cb.devcb.loc_auth_req   = auth_req;
        btm_cb.devcb.loc_io_caps    = io_cap;

        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) {
            auth_req = (BTM_AUTH_DD_BOND | (auth_req & BTM_AUTH_YN_BIT));
        }

        btsnd_hcic_io_cap_req_reply (bd_addr, io_cap, oob, auth_req);
    }
}

/*******************************************************************************
**
** Function         BTM_ReadLocalOobData
**
** Description      This function is called to read the local OOB data from
**                  LM
**
*******************************************************************************/
tBTM_STATUS BTM_ReadLocalOobData(void)
{
    tBTM_STATUS status = BTM_SUCCESS;

    if (btsnd_hcic_read_local_oob_data() == FALSE) {
        status = BTM_NO_RESOURCES;
    }

    return status;
}

/*******************************************************************************
**
** Function         BTM_RemoteOobDataReply
**
** Description      This function is called to provide the remote OOB data for
**                  Simple Pairing in response to BTM_SP_RMT_OOB_EVT
**
** Parameters:      bd_addr     - Address of the peer device
**                  c           - simple pairing Hash C.
**                  r           - simple pairing Randomizer  C.
**
*******************************************************************************/
void BTM_RemoteOobDataReply(tBTM_STATUS res, BD_ADDR bd_addr, BT_OCTET16 c, BT_OCTET16 r)
{
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("%s() - State: %s res: %d\n", __func__,
                     btm_pair_state_descr(btm_cb.pairing_state), res);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    /* If timeout already expired or has been canceled, ignore the reply */
    if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP) {
        return;
    }

    btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);

    if (res != BTM_SUCCESS) {
        /* use BTM_PAIR_STATE_WAIT_AUTH_COMPLETE to report authentication failed event */
        btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
        btsnd_hcic_rem_oob_neg_reply (bd_addr);
    } else {
        btm_cb.acl_disc_reason = HCI_SUCCESS;
        btsnd_hcic_rem_oob_reply (bd_addr, c, r);
    }
}

/*******************************************************************************
**
** Function         BTM_BuildOobData
**
** Description      This function is called to build the OOB data payload to
**                  be sent over OOB (non-Bluetooth) link
**
** Parameters:      p_data  - the location for OOB data
**                  max_len - p_data size.
**                  c       - simple pairing Hash C.
**                  r       - simple pairing Randomizer  C.
**                  name_len- 0, local device name would not be included.
**                            otherwise, the local device name is included for
**                            up to this specified length
**
** Returns          Number of bytes in p_data.
**
*******************************************************************************/
UINT16 BTM_BuildOobData(UINT8 *p_data, UINT16 max_len, BT_OCTET16 c,
                        BT_OCTET16 r, UINT8 name_len)
{
    UINT8   *p = p_data;
    UINT16  len = 0;
#if BTM_MAX_LOC_BD_NAME_LEN > 0
    UINT16  name_size;
    UINT8   name_type = BTM_EIR_SHORTENED_LOCAL_NAME_TYPE;
#endif

    if (p_data && max_len >= BTM_OOB_MANDATORY_SIZE) {
        /* add mandatory part */
        UINT16_TO_STREAM(p, len);
        BDADDR_TO_STREAM(p, controller_get_interface()->get_address()->address);

        len = BTM_OOB_MANDATORY_SIZE;
        max_len -= len;

        /* now optional part */

        /* add Hash C */
        UINT16 delta = BTM_OOB_HASH_C_SIZE + 2;
        if (max_len >= delta) {
            *p++ = BTM_OOB_HASH_C_SIZE + 1;
            *p++ = BTM_EIR_OOB_SSP_HASH_C_TYPE;
            ARRAY_TO_STREAM(p, c, BTM_OOB_HASH_C_SIZE);
            len     += delta;
            max_len -= delta;
        }

        /* add Rand R */
        delta = BTM_OOB_RAND_R_SIZE + 2;
        if (max_len >= delta) {
            *p++ = BTM_OOB_RAND_R_SIZE + 1;
            *p++ = BTM_EIR_OOB_SSP_RAND_R_TYPE;
            ARRAY_TO_STREAM(p, r, BTM_OOB_RAND_R_SIZE);
            len     += delta;
            max_len -= delta;
        }

        /* add class of device */
        delta = BTM_OOB_COD_SIZE + 2;
        if (max_len >= delta) {
            *p++ = BTM_OOB_COD_SIZE + 1;
            *p++ = BTM_EIR_OOB_COD_TYPE;
            DEVCLASS_TO_STREAM(p, btm_cb.devcb.dev_class);
            len     += delta;
            max_len -= delta;
        }
#if BTM_MAX_LOC_BD_NAME_LEN > 0
        name_size = name_len;
        if (name_size > strlen(btm_cb.cfg.bd_name)) {
            name_type = BTM_EIR_COMPLETE_LOCAL_NAME_TYPE;
            name_size = (UINT16)strlen(btm_cb.cfg.bd_name);
        }
        delta = name_size + 2;
        if (max_len >= delta) {
            *p++ = name_size + 1;
            *p++ = name_type;
            ARRAY_TO_STREAM (p, btm_cb.cfg.bd_name, name_size);
            len     += delta;
            max_len -= delta;
        }
#endif
        /* update len */
        p = p_data;
        UINT16_TO_STREAM(p, len);
    }
    return len;
}

/*******************************************************************************
**
** Function         BTM_ReadOobData
**
** Description      This function is called to parse the OOB data payload
**                  received over OOB (non-Bluetooth) link
**
** Parameters:      p_data  - the location for OOB data
**                  eir_tag - The associated EIR tag to read the data.
**                  *p_len(output) - the length of the data with the given tag.
**
** Returns          the beginning of the data with the given tag.
**                  NULL, if the tag is not found.
**
*******************************************************************************/
UINT8 *BTM_ReadOobData(UINT8 *p_data, UINT8 eir_tag, UINT8 *p_len)
{
    UINT8   *p = p_data;
    UINT16  max_len;
    UINT8   len, type;
    UINT8   *p_ret = NULL;
    UINT8   ret_len = 0;

    if (p_data) {
        STREAM_TO_UINT16(max_len, p);
        if (max_len >= BTM_OOB_MANDATORY_SIZE) {
            if (BTM_EIR_OOB_BD_ADDR_TYPE == eir_tag) {
                p_ret = p; /* the location for bd_addr */
                ret_len = BTM_OOB_BD_ADDR_SIZE;
            } else {
                p += BD_ADDR_LEN;
                max_len -= BTM_OOB_MANDATORY_SIZE;
                /* now the optional data in EIR format */
                while (max_len > 0) {
                    len     = *p++; /* tag data len + 1 */
                    type    = *p++;
                    if (eir_tag == type) {
                        p_ret = p;
                        ret_len = len - 1;
                        break;
                    }
                    /* the data size of this tag is len + 1 (tag data len + 2) */
                    if (max_len > len) {
                        max_len -= len;
                        max_len--;
                        len--;
                        p += len;
                    } else {
                        max_len = 0;
                    }
                }
            }
        }
    }

    if (p_len) {
        *p_len = ret_len;
    }

    return p_ret;
}
#endif  ///BTM_OOB_INCLUDED == TRUE && SMP_INCLUDED == TRUE

#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function         BTM_BothEndsSupportSecureConnections
**
** Description      This function is called to check if both the local device and the peer device
**                  specified by bd_addr support BR/EDR Secure Connections.
**
** Parameters:      bd_addr - address of the peer
**
** Returns          TRUE if BR/EDR Secure Connections are supported by both local
**                  and the remote device.
**                  else FALSE.
**
*******************************************************************************/
BOOLEAN BTM_BothEndsSupportSecureConnections(BD_ADDR bd_addr)
{
    return ((controller_get_interface()->supports_secure_connections()) &&
            (BTM_PeerSupportsSecureConnections(bd_addr)));
}

/*******************************************************************************
**
** Function         BTM_PeerSupportsSecureConnections
**
** Description      This function is called to check if the peer supports
**                  BR/EDR Secure Connections.
**
** Parameters:      bd_addr - address of the peer
**
** Returns          TRUE if BR/EDR Secure Connections are supported by the peer,
**                  else FALSE.
**
*******************************************************************************/
BOOLEAN BTM_PeerSupportsSecureConnections(BD_ADDR bd_addr)
{
    tBTM_SEC_DEV_REC    *p_dev_rec;

    if ((p_dev_rec = btm_find_dev(bd_addr)) == NULL) {
        BTM_TRACE_WARNING("%s: unknown BDA: %08x%04x\n", __FUNCTION__,
                          (bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
                          (bd_addr[4] << 8) + bd_addr[5]);
        return FALSE;
    }

    return (p_dev_rec->remote_supports_secure_connections);
}

/*******************************************************************************
**
** Function         BTM_SetOutService
**
** Description      This function is called to set the service for
**                  outgoing connections.
**
**                  If the profile/application calls BTM_SetSecurityLevel
**                  before initiating a connection, this function does not
**                  need to be called.
**
** Returns          void
**
*******************************************************************************/
void BTM_SetOutService(BD_ADDR bd_addr, UINT8 service_id, UINT32 mx_chan_id)
{
    tBTM_SEC_DEV_REC *p_dev_rec;
    tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];

    btm_cb.p_out_serv = p_serv_rec;
    p_dev_rec = btm_find_dev (bd_addr);

    for (int i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) {
        if ((p_serv_rec->security_flags & BTM_SEC_IN_USE)
                && (p_serv_rec->service_id == service_id)
                && (p_serv_rec->orig_mx_chan_id == mx_chan_id)) {
            BTM_TRACE_API("BTM_SetOutService p_out_serv id %d, psm 0x%04x, proto_id %d, chan_id %d\n",
                          p_serv_rec->service_id, p_serv_rec->psm, p_serv_rec->mx_proto_id, p_serv_rec->orig_mx_chan_id);
            btm_cb.p_out_serv = p_serv_rec;
            if (p_dev_rec) {
                p_dev_rec->p_cur_service = p_serv_rec;
            }
            break;
        }
    }
}
#endif  ///CLASSIC_BT_INCLUDED == TRUE


/************************************************************************
**              I N T E R N A L     F U N C T I O N S
*************************************************************************/
/*******************************************************************************
**
** Function         btm_sec_is_upgrade_possible
**
** Description      This function returns TRUE if the existing link key
**                  can be upgraded or if the link key does not exist.
**
** Returns          BOOLEAN
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static BOOLEAN btm_sec_is_upgrade_possible(tBTM_SEC_DEV_REC  *p_dev_rec, BOOLEAN is_originator)
{
    UINT16              mtm_check = is_originator ? BTM_SEC_OUT_MITM : BTM_SEC_IN_MITM;
    BOOLEAN             is_possible = TRUE;

    if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) {
        is_possible = FALSE;
        if (p_dev_rec->p_cur_service) {
            BTM_TRACE_DEBUG ("%s() id: %d, link_key_typet: %d, rmt_io_caps: %d, chk flags: 0x%x, flags: 0x%x\n",
                             __func__, p_dev_rec->p_cur_service->service_id, p_dev_rec->link_key_type,
                             p_dev_rec->rmt_io_caps, mtm_check, p_dev_rec->p_cur_service->security_flags);
        } else {
            BTM_TRACE_DEBUG ("%s() link_key_typet: %d, rmt_io_caps: %d, chk flags: 0x%x\n",
                             __func__, p_dev_rec->link_key_type, p_dev_rec->rmt_io_caps, mtm_check);
        }
        /* Already have a link key to the connected peer. Is the link key secure enough?
        ** Is a link key upgrade even possible?
        */
        if ((p_dev_rec->security_required & mtm_check)    /* needs MITM */
                && ((p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB) ||
                    (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256))
                /* has unauthenticated
                link key */
                && (p_dev_rec->rmt_io_caps < BTM_IO_CAP_MAX)  /* a valid peer IO cap */
                && (btm_sec_io_map[p_dev_rec->rmt_io_caps][btm_cb.devcb.loc_io_caps]))
            /* authenticated
            link key is possible */
        {
            /* upgrade is possible: check if the application wants the upgrade.
             * If the application is configured to use a global MITM flag,
             * it probably would not want to upgrade the link key based on the security level database */
            is_possible = TRUE;
        }
    }
    BTM_TRACE_DEBUG ("%s() is_possible: %d sec_flags: 0x%x\n", __func__, is_possible, p_dev_rec->sec_flags);
    return is_possible;
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_check_upgrade
**
** Description      This function is called to check if the existing link key
**                  needs to be upgraded.
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_check_upgrade(tBTM_SEC_DEV_REC  *p_dev_rec, BOOLEAN is_originator)
{

    BTM_TRACE_DEBUG ("%s()\n", __func__);

    /* Only check if link key already exists */
    if (!(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) {
        return;
    }

    if (btm_sec_is_upgrade_possible (p_dev_rec, is_originator) == TRUE) {
        BTM_TRACE_DEBUG ("need upgrade!! sec_flags:0x%x\n", p_dev_rec->sec_flags);
        /* upgrade is possible: check if the application wants the upgrade.
         * If the application is configured to use a global MITM flag,
         * it probably would not want to upgrade the link key based on the security level database */
        tBTM_SP_UPGRADE evt_data;
        memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
        evt_data.upgrade = TRUE;
        if (btm_cb.api.p_sp_callback) {
            (*btm_cb.api.p_sp_callback) (BTM_SP_UPGRADE_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
        }

        BTM_TRACE_DEBUG ("evt_data.upgrade:0x%x\n", evt_data.upgrade);
        if (evt_data.upgrade) {
            /* if the application confirms the upgrade, set the upgrade bit */
            p_dev_rec->sm4 |= BTM_SM4_UPGRADE;

            /* Clear the link key known to go through authentication/pairing again */
            p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED);
            p_dev_rec->sec_flags &= ~BTM_SEC_AUTHENTICATED;
            BTM_TRACE_DEBUG ("sec_flags:0x%x\n", p_dev_rec->sec_flags);
        }
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_l2cap_access_req
**
** Description      This function is called by the L2CAP to grant permission to
**                  establish L2CAP connection to or from the peer device.
**
** Parameters:      bd_addr       - Address of the peer device
**                  psm           - L2CAP PSM
**                  is_originator - TRUE if protocol above L2CAP originates
**                                  connection
**                  p_callback    - Pointer to callback function called if
**                                  this function returns PENDING after required
**                                  procedures are complete. MUST NOT BE NULL.
**
** Returns          tBTM_STATUS
**
*******************************************************************************/
tBTM_STATUS btm_sec_l2cap_access_req (BD_ADDR bd_addr, UINT16 psm, UINT16 handle,
                                      CONNECTION_TYPE conn_type,
                                      tBTM_SEC_CALLBACK *p_callback,
                                      void *p_ref_data)
{
#if (SMP_INCLUDED == TRUE)
    tBTM_SEC_DEV_REC  *p_dev_rec;
    tBTM_SEC_SERV_REC *p_serv_rec;
    UINT16         security_required;
    UINT16         old_security_required;
    BOOLEAN       old_is_originator;
    tBTM_STATUS   rc = BTM_SUCCESS;
    BOOLEAN       chk_acp_auth_done = FALSE;
    BOOLEAN is_originator;
    BOOLEAN     transport = FALSE; /* should check PSM range in LE connection oriented L2CAP connection */

#if (L2CAP_UCD_INCLUDED == TRUE)
    if (conn_type & CONNECTION_TYPE_ORIG_MASK) {
        is_originator = TRUE;
    } else {
        is_originator = FALSE;
    }

    BTM_TRACE_DEBUG ("%s() conn_type: 0x%x, %p\n", __func__, conn_type, p_ref_data);
#else
    is_originator = conn_type;

    BTM_TRACE_DEBUG ("%s() is_originator:%d, %p\n", __func__, is_originator, p_ref_data);
#endif

    /* Find or get oldest record */
    p_dev_rec = btm_find_or_alloc_dev (bd_addr);

    p_dev_rec->hci_handle = handle;

    /* Find the service record for the PSM */
    p_serv_rec = btm_sec_find_first_serv (conn_type, psm);

    /* If there is no application registered with this PSM do not allow connection */
    if (!p_serv_rec) {
        BTM_TRACE_WARNING ("%s() PSM: %d no application registerd\n", __func__, psm);
        (*p_callback) (bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED);
        return (BTM_MODE_UNSUPPORTED);
    }

    /* Services level0 by default have no security */
    if ((btm_sec_is_serv_level0(psm)) && (!btm_cb.devcb.secure_connections_only)) {
        (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS_NO_SECURITY);
        return (BTM_SUCCESS);
    }
#if (L2CAP_UCD_INCLUDED == TRUE)
    if ( conn_type & CONNECTION_TYPE_CONNLESS_MASK ) {
        if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
            security_required = btm_sec_set_serv_level4_flags (p_serv_rec->ucd_security_flags,
                                is_originator);
        } else {
            security_required = p_serv_rec->ucd_security_flags;
        }

        rc = BTM_CMD_STARTED;
        if (is_originator) {
            if (((security_required & BTM_SEC_OUT_FLAGS) == 0) ||
                    ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))) ||
                    ((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) ||
                    ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_FLAGS) && (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED))) ) {
                rc = BTM_SUCCESS;
            }
        } else {
            if (((security_required & BTM_SEC_IN_FLAGS) == 0) ||
                    ((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))) ||
                    ((((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) ||
                    ((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_FLAGS) && (p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED))) ) {
                // Check for 16 digits (or MITM)
                if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) ||
                        (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == BTM_SEC_IN_MIN_16_DIGIT_PIN) &&
                         btm_dev_16_digit_authenticated(p_dev_rec))) {
                    rc = BTM_SUCCESS;
                }
            }
        }

        if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) &&
                (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
            rc = BTM_CMD_STARTED;
        }

        if (rc == BTM_SUCCESS) {
            if (p_callback) {
                (*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_SUCCESS);
            }

            return (BTM_SUCCESS);
        }
    } else
#endif
    {
        if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
            security_required = btm_sec_set_serv_level4_flags (p_serv_rec->security_flags,
                                is_originator);
        } else {
            security_required = p_serv_rec->security_flags;
        }
    }

    BTM_TRACE_DEBUG("%s: security_required 0x%04x, is_originator 0x%02x, psm  0x%04x\n",
                    __FUNCTION__, security_required, is_originator, psm);

    if ((!is_originator) && (security_required & BTM_SEC_MODE4_LEVEL4)) {
        BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections();
        /* acceptor receives L2CAP Channel Connect Request for Secure Connections Only service */
        if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections)) {
            BTM_TRACE_DEBUG("%s: SC only service, local_support_for_sc %d\n"
                            "rmt_support_for_sc : %d -> fail pairing\n", __FUNCTION__,
                            local_supports_sc,
                            p_dev_rec->remote_supports_secure_connections);
            if (p_callback) {
                (*p_callback) (bd_addr, transport, (void *)p_ref_data,
                               BTM_MODE4_LEVEL4_NOT_SUPPORTED);
            }

            return (BTM_MODE4_LEVEL4_NOT_SUPPORTED);
        }
    }

    /* there are some devices (moto KRZR) which connects to several services at the same time */
    /* we will process one after another */
    if ( (p_dev_rec->p_callback) || (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) ) {
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_EVENT ("%s() - busy - PSM:%d delayed  state: %s mode:%d, sm4:0x%x\n", __func__,
                         psm, btm_pair_state_descr(btm_cb.pairing_state), btm_cb.security_mode, p_dev_rec->sm4);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        BTM_TRACE_EVENT ("security_flags:x%x, sec_flags:x%x\n", security_required, p_dev_rec->sec_flags);
        rc = BTM_CMD_STARTED;
        if ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED ||
                btm_cb.security_mode == BTM_SEC_MODE_NONE ||
                btm_cb.security_mode == BTM_SEC_MODE_SERVICE ||
                btm_cb.security_mode == BTM_SEC_MODE_LINK) ||
                (BTM_SM4_KNOWN == p_dev_rec->sm4) || (BTM_SEC_IS_SM4(p_dev_rec->sm4) &&
                        (btm_sec_is_upgrade_possible(p_dev_rec, is_originator) == FALSE))) {
            /* legacy mode - local is legacy or local is lisbon/peer is legacy
             * or SM4 with no possibility of link key upgrade */
            if (is_originator) {
                if (((security_required & BTM_SEC_OUT_FLAGS) == 0) ||
                        ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec))) ||
                        ((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && btm_dev_encrypted(p_dev_rec))) ||
                        ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_FLAGS) && btm_dev_authorized(p_dev_rec)  && btm_dev_encrypted(p_dev_rec))) ) {
                    rc = BTM_SUCCESS;
                }
            } else {
                if (((security_required & BTM_SEC_IN_FLAGS) == 0) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec)) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && btm_dev_encrypted(p_dev_rec)) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHORIZE) && (btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec))) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_AUTHORIZE)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_authenticated(p_dev_rec))) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_ENCRYPT | BTM_SEC_IN_AUTHORIZE)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_encrypted(p_dev_rec))) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_FLAGS)  && btm_dev_encrypted(p_dev_rec) && (btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)))) {
                    // Check for 16 digits (or MITM)
                    if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) ||
                            (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == BTM_SEC_IN_MIN_16_DIGIT_PIN) && btm_dev_16_digit_authenticated(p_dev_rec))) {
                        rc = BTM_SUCCESS;
                    }
                }
            }

            if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) &&
                    (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
                rc = BTM_CMD_STARTED;
            }

            if (rc == BTM_SUCCESS) {
                if (p_callback) {
                    (*p_callback) (bd_addr, transport, (void *)p_ref_data, BTM_SUCCESS);
                }
                return (BTM_SUCCESS);
            }
        }

        btm_cb.sec_req_pending = TRUE;
        return (BTM_CMD_STARTED);
    }

    /* Save pointer to service record */
    p_dev_rec->p_cur_service = p_serv_rec;

    /* Modify security_required in btm_sec_l2cap_access_req for Lisbon */
    if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
            btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
            btm_cb.security_mode == BTM_SEC_MODE_SC) {
        if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
            if (is_originator) {
                /* SM4 to SM4 -> always authenticate & encrypt */
                security_required |= (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT);
            } else { /* acceptor */
                /* SM4 to SM4: the acceptor needs to make sure the authentication is already done */
                chk_acp_auth_done = TRUE;
                /* SM4 to SM4 -> always authenticate & encrypt */
                security_required |= (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT);
            }
        } else if (!(BTM_SM4_KNOWN & p_dev_rec->sm4)) {
            /* the remote features are not known yet */
            BTM_TRACE_ERROR("%s: (%s) remote features unknown!!sec_flags:0x%02x\n", __FUNCTION__,
                            (is_originator) ? "initiator" : "acceptor", p_dev_rec->sec_flags);

            p_dev_rec->sm4 |= BTM_SM4_REQ_PEND;
            return (BTM_CMD_STARTED);
        }
    }

    BTM_TRACE_DEBUG ("%s()  sm4:0x%x, sec_flags:0x%x, security_required:0x%x chk:%d\n", __func__,
                     p_dev_rec->sm4, p_dev_rec->sec_flags, security_required, chk_acp_auth_done);

    old_security_required        = p_dev_rec->security_required;
    old_is_originator            = p_dev_rec->is_originator;
    p_dev_rec->security_required = security_required;
    p_dev_rec->p_ref_data        = p_ref_data;
    p_dev_rec->is_originator     = is_originator;

#if (L2CAP_UCD_INCLUDED == TRUE)
    if ( conn_type & CONNECTION_TYPE_CONNLESS_MASK ) {
        p_dev_rec->is_ucd = TRUE;
    } else {
        p_dev_rec->is_ucd = FALSE;
    }
#endif

    /* If there are multiple service records used through the same PSM */
    /* leave security decision for the multiplexor on the top */
#if (L2CAP_UCD_INCLUDED == TRUE)
    if (((btm_sec_find_next_serv (p_serv_rec)) != NULL)
            && (!( conn_type & CONNECTION_TYPE_CONNLESS_MASK ))) /* if not UCD */
#else
    if ((btm_sec_find_next_serv (p_serv_rec)) != NULL)
#endif
    {
        BTM_TRACE_DEBUG ("no next_serv sm4:0x%x, chk:%d\n", p_dev_rec->sm4, chk_acp_auth_done);
        if (!BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
            BTM_TRACE_EVENT ("Security Manager: l2cap_access_req PSM:%d postponed for multiplexer\n", psm);
            /* pre-Lisbon: restore the old settings */
            p_dev_rec->security_required = old_security_required;
            p_dev_rec->is_originator     = old_is_originator;

            (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS);

            return (BTM_SUCCESS);
        }
    }

    /* if the originator is using dynamic PSM in legacy mode, do not start any security process now
     * The layer above L2CAP needs to carry out the security requirement after L2CAP connect
     * response is received */
    if (is_originator &&
            ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED ||
              btm_cb.security_mode == BTM_SEC_MODE_NONE ||
              btm_cb.security_mode == BTM_SEC_MODE_SERVICE ||
              btm_cb.security_mode == BTM_SEC_MODE_LINK) ||
             !BTM_SEC_IS_SM4(p_dev_rec->sm4)) && (psm >= 0x1001)) {
        BTM_TRACE_EVENT ("dynamic PSM:0x%x in legacy mode - postponed for upper layer\n", psm);
        /* restore the old settings */
        p_dev_rec->security_required = old_security_required;
        p_dev_rec->is_originator     = old_is_originator;

        (*p_callback) (bd_addr, transport, p_ref_data, BTM_SUCCESS);

        return (BTM_SUCCESS);
    }

    if (chk_acp_auth_done) {
        BTM_TRACE_DEBUG ("(SM4 to SM4) btm_sec_l2cap_access_req rspd. authenticated: x%x, enc: x%x\n",
                         (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED), (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED));
        /* SM4, but we do not know for sure which level of security we need.
         * as long as we have a link key, it's OK */
        if ((0 == (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))
                || (0 == (p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED))) {
            rc = BTM_DELAY_CHECK;
            /*
            2046 may report HCI_Encryption_Change and L2C Connection Request out of sequence
            because of data path issues. Delay this disconnect a little bit
            */
            BTM_TRACE_API("%s peer should have initiated security process by now (SM4 to SM4)\n", __func__);
            p_dev_rec->p_callback        = p_callback;
            p_dev_rec->sec_state         = BTM_SEC_STATE_DELAY_FOR_ENC;
            (*p_callback) (bd_addr, transport, p_ref_data, rc);

            return BTM_SUCCESS;
        }
    }

    p_dev_rec->p_callback        = p_callback;

    if (p_dev_rec->last_author_service_id == BTM_SEC_NO_LAST_SERVICE_ID
            || p_dev_rec->last_author_service_id != p_dev_rec->p_cur_service->service_id) {
        /* Although authentication and encryption are per connection
        ** authorization is per access request.  For example when serial connection
        ** is up and authorized and client requests to read file (access to other
        ** scn), we need to request user's permission again.
        */
        p_dev_rec->sec_flags &= ~BTM_SEC_AUTHORIZED;
    }

    if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
        if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) &&
                (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
            /* BTM_LKEY_TYPE_AUTH_COMB_P_256 is the only acceptable key in this case */
            if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) != 0) {
                p_dev_rec->sm4 |= BTM_SM4_UPGRADE;
            }
            p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED |
                                      BTM_SEC_AUTHENTICATED);
            BTM_TRACE_DEBUG ("%s: sec_flags:0x%x", __FUNCTION__, p_dev_rec->sec_flags);
        } else {
            /* If we already have a link key to the connected peer, is it secure enough? */
            btm_sec_check_upgrade(p_dev_rec, is_originator);
        }
    }

    BTM_TRACE_EVENT ("%s() PSM:%d Handle:%d State:%d Flags: 0x%x Required: 0x%x Service ID:%d\n",
                     __func__, psm, handle, p_dev_rec->sec_state, p_dev_rec->sec_flags,
                     p_dev_rec->security_required, p_dev_rec->p_cur_service->service_id);

    if ((rc = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED) {
        p_dev_rec->p_callback = NULL;
        (*p_callback) (bd_addr, transport, p_dev_rec->p_ref_data, (UINT8)rc);
    }

    return (rc);
#else
    return BTM_MODE_UNSUPPORTED;
#endif  ///SMP_INCLUDED == TRUE
}

/*******************************************************************************
**
** Function         btm_sec_mx_access_request
**
** Description      This function is called by all Multiplexing Protocols during
**                  establishing connection to or from peer device to grant
**                  permission to establish application connection.
**
** Parameters:      bd_addr       - Address of the peer device
**                  psm           - L2CAP PSM
**                  is_originator - TRUE if protocol above L2CAP originates
**                                  connection
**                  mx_proto_id   - protocol ID of the multiplexer
**                  mx_chan_id    - multiplexer channel to reach application
**                  p_callback    - Pointer to callback function called if
**                                  this function returns PENDING after required
**                                  procedures are completed
**                  p_ref_data    - Pointer to any reference data needed by the
**                                  the callback function.
**
** Returns          BTM_CMD_STARTED
**
*******************************************************************************/
tBTM_STATUS btm_sec_mx_access_request (BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_originator,
                                       UINT32 mx_proto_id, UINT32 mx_chan_id,
                                       tBTM_SEC_CALLBACK *p_callback, void *p_ref_data)
{
#if (SMP_INCLUDED == TRUE)
    tBTM_SEC_DEV_REC  *p_dev_rec;
    tBTM_SEC_SERV_REC *p_serv_rec;
    tBTM_STATUS        rc;
    UINT16             security_required;
    BOOLEAN transport   = FALSE;/* should check PSM range in LE connection oriented L2CAP connection */

    BTM_TRACE_DEBUG ("%s() is_originator: %d\n", __func__, is_originator);
    /* Find or get oldest record */
    p_dev_rec = btm_find_or_alloc_dev (bd_addr);

    /* Find the service record for the PSM */
    p_serv_rec = btm_sec_find_mx_serv (is_originator, psm, mx_proto_id, mx_chan_id);

    /* If there is no application registered with this PSM do not allow connection */
    if (!p_serv_rec) {
        if (p_callback) {
            (*p_callback) (bd_addr, transport, p_ref_data, BTM_MODE_UNSUPPORTED);
        }

        BTM_TRACE_ERROR ("Security Manager: MX service not found PSM:%d Proto:%d SCN:%d\n",
                         psm, mx_proto_id, mx_chan_id);
        return BTM_NO_RESOURCES;
    }

    if ((btm_cb.security_mode == BTM_SEC_MODE_SC) && (!btm_sec_is_serv_level0(psm))) {
        security_required = btm_sec_set_serv_level4_flags (p_serv_rec->security_flags,
                            is_originator);
    } else {
        security_required = p_serv_rec->security_flags;
    }

    /* there are some devices (moto phone) which connects to several services at the same time */
    /* we will process one after another */
    if ( (p_dev_rec->p_callback) || (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) ) {
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_EVENT ("%s() service PSM:%d Proto:%d SCN:%d delayed  state: %s\n", __func__,
                         psm, mx_proto_id, mx_chan_id, btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        rc = BTM_CMD_STARTED;

        if ((btm_cb.security_mode == BTM_SEC_MODE_UNDEFINED ||
                btm_cb.security_mode == BTM_SEC_MODE_NONE ||
                btm_cb.security_mode == BTM_SEC_MODE_SERVICE ||
                btm_cb.security_mode == BTM_SEC_MODE_LINK) ||
                (BTM_SM4_KNOWN == p_dev_rec->sm4) || (BTM_SEC_IS_SM4(p_dev_rec->sm4) &&
                        (btm_sec_is_upgrade_possible(p_dev_rec, is_originator) == FALSE))) {
            /* legacy mode - local is legacy or local is lisbon/peer is legacy
             * or SM4 with no possibility of link key upgrade */
            if (is_originator) {
                if (((security_required & BTM_SEC_OUT_FLAGS) == 0) ||
                        ((((security_required & BTM_SEC_OUT_FLAGS) == BTM_SEC_OUT_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec))) ||
                        ((((security_required & BTM_SEC_OUT_FLAGS) == (BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_OUT_ENCRYPT)) && btm_dev_encrypted(p_dev_rec)))
                   ) {
                    rc = BTM_SUCCESS;
                }
            } else {
                if (((security_required & BTM_SEC_IN_FLAGS) == 0) ||
                        ((((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHENTICATE) && btm_dev_authenticated(p_dev_rec))) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == BTM_SEC_IN_AUTHORIZE) && (btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec))) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_AUTHENTICATE)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_authenticated(p_dev_rec))) ||
                        (((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHORIZE | BTM_SEC_IN_ENCRYPT)) && ((btm_dev_authorized(p_dev_rec) || btm_serv_trusted(p_dev_rec, p_serv_rec)) && btm_dev_encrypted(p_dev_rec))) ||
                        ((((security_required & BTM_SEC_IN_FLAGS) == (BTM_SEC_IN_AUTHENTICATE | BTM_SEC_IN_ENCRYPT)) && btm_dev_encrypted(p_dev_rec)))
                   ) {
                    // Check for 16 digits (or MITM)
                    if (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == 0) ||
                            (((security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN) == BTM_SEC_IN_MIN_16_DIGIT_PIN) && btm_dev_16_digit_authenticated(p_dev_rec))) {
                        rc = BTM_SUCCESS;
                    }
                }
            }
            if ((rc == BTM_SUCCESS) && (security_required & BTM_SEC_MODE4_LEVEL4) &&
                    (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
                rc = BTM_CMD_STARTED;
            }
        }

        if (rc == BTM_SUCCESS) {
            BTM_TRACE_EVENT("%s: allow to bypass, checking authorization\n", __FUNCTION__);
            /* the security in BTM_SEC_IN_FLAGS is fullfilled so far, check the requirements in */
            /* btm_sec_execute_procedure */
            if ((is_originator && (p_serv_rec->security_flags & BTM_SEC_OUT_AUTHORIZE)) ||
                    (!is_originator && (p_serv_rec->security_flags & BTM_SEC_IN_AUTHORIZE))) {
                BTM_TRACE_EVENT("%s: still need authorization\n", __FUNCTION__);
                rc = BTM_CMD_STARTED;
            }
        }

        /* Check whether there is a pending security procedure, if so we should always queue */
        /* the new security request */
        if (p_dev_rec->sec_state != BTM_SEC_STATE_IDLE) {
            BTM_TRACE_EVENT("%s: There is a pending security procedure\n", __FUNCTION__);
            rc = BTM_CMD_STARTED;
        }
        if (rc == BTM_CMD_STARTED) {
            BTM_TRACE_EVENT("%s: call btm_sec_queue_mx_request\n", __FUNCTION__);
            btm_sec_queue_mx_request (bd_addr, psm,  is_originator, mx_proto_id,
                                      mx_chan_id, p_callback, p_ref_data);
        } else { /* rc == BTM_SUCCESS */
            /* access granted */
            if (p_callback) {
                (*p_callback) (bd_addr, transport, p_ref_data, (UINT8)rc);
            }
        }
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_EVENT("%s: return with rc = 0x%02x in delayed state %s\n", __FUNCTION__, rc,
                        btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        return rc;
    }

    if ((!is_originator) && ((security_required & BTM_SEC_MODE4_LEVEL4) ||
                             (btm_cb.security_mode == BTM_SEC_MODE_SC))) {
        BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections();
        /* acceptor receives service connection establishment Request for */
        /* Secure Connections Only service */
        if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections)) {
            BTM_TRACE_DEBUG("%s: SC only service,local_support_for_sc %d,\n"
                            "remote_support_for_sc %d: fail pairing\n", __FUNCTION__,
                            local_supports_sc, p_dev_rec->remote_supports_secure_connections);

            if (p_callback) {
                (*p_callback) (bd_addr, transport, (void *)p_ref_data,
                               BTM_MODE4_LEVEL4_NOT_SUPPORTED);
            }

            return (BTM_MODE4_LEVEL4_NOT_SUPPORTED);
        }
    }

    p_dev_rec->p_cur_service     = p_serv_rec;
    p_dev_rec->security_required = security_required;

    if (btm_cb.security_mode == BTM_SEC_MODE_SP ||
            btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
            btm_cb.security_mode == BTM_SEC_MODE_SC) {
        if (BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
            if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) &&
                    (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
                /* BTM_LKEY_TYPE_AUTH_COMB_P_256 is the only acceptable key in this case */
                if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) != 0) {
                    p_dev_rec->sm4 |= BTM_SM4_UPGRADE;
                }

                p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED |
                                          BTM_SEC_AUTHENTICATED);
                BTM_TRACE_DEBUG("%s: sec_flags:0x%x\n", __FUNCTION__, p_dev_rec->sec_flags);
            } else {
                /* If we already have a link key, check if that link key is good enough */
                btm_sec_check_upgrade(p_dev_rec, is_originator);
            }
        }
    }

    p_dev_rec->is_originator     = is_originator;
    p_dev_rec->p_callback        = p_callback;
    p_dev_rec->p_ref_data        = p_ref_data;

    /* Although authentication and encryption are per connection */
    /* authorization is per access request.  For example when serial connection */
    /* is up and authorized and client requests to read file (access to other */
    /* scn, we need to request user's permission again. */
    p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED);

    BTM_TRACE_EVENT ("%s() proto_id:%d chan_id:%d State:%d Flags:0x%x Required:0x%x Service ID:%d\n",
                     __func__, mx_proto_id, mx_chan_id, p_dev_rec->sec_state, p_dev_rec->sec_flags,
                     p_dev_rec->security_required, p_dev_rec->p_cur_service->service_id);

    if ((rc = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED) {
        if (p_callback) {
            p_dev_rec->p_callback = NULL;
            (*p_callback) (bd_addr, transport, p_ref_data, (UINT8)rc);
        }
    }

    return rc;
#else
    return BTM_MODE_UNSUPPORTED;
#endif  ///SMP_INCLUDED == TRUE
}

/*******************************************************************************
**
** Function         btm_sec_conn_req
**
** Description      This function is when the peer device is requesting
**                  connection
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_conn_req (UINT8 *bda, UINT8 *dc)
{
    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev (bda);
    /* Some device may request a connection before we are done with the HCI_Reset sequence */
    if (!controller_get_interface()->get_is_ready()) {
        BTM_TRACE_ERROR ("Security Manager: connect request when device not ready\n");
        btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE);
        return;
    }

    /* Security guys wants us not to allow connection from not paired devices */

    /* Check if connection is allowed for only paired devices */
    if (btm_cb.connect_only_paired) {
        if (!p_dev_rec || !(p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)) {
            BTM_TRACE_ERROR ("Security Manager: connect request from non-paired device\n");
            btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE);
            return;
        }
    }

#if BTM_ALLOW_CONN_IF_NONDISCOVER == FALSE
    /* If non-discoverable, only allow known devices to connect */
    if (btm_cb.btm_inq_vars.discoverable_mode == BTM_NON_DISCOVERABLE) {
        if (!p_dev_rec) {
            BTM_TRACE_ERROR ("Security Manager: connect request from not paired device\n");
            btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE);
            return;
        }
    }
#endif

    if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
            && (!memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN))) {
        BTM_TRACE_ERROR ("Security Manager: reject connect request from bonding device\n");

        /* incoming connection from bonding device is rejected */
        btm_cb.pairing_flags |= BTM_PAIR_FLAGS_REJECTED_CONNECT;
        btsnd_hcic_reject_conn (bda, HCI_ERR_HOST_REJECT_DEVICE);
        return;
    }

    /* Host is not interested or approved connection.  Save BDA and DC and */
    /* pass request to L2CAP */
    memcpy (btm_cb.connecting_bda, bda, BD_ADDR_LEN);
    memcpy (btm_cb.connecting_dc,  dc,  DEV_CLASS_LEN);

    if (l2c_link_hci_conn_req (bda)) {
        if (!p_dev_rec) {
            /* accept the connection -> allocate a device record */
            p_dev_rec = btm_sec_alloc_dev (bda);
        }
        if (p_dev_rec) {
            p_dev_rec->sm4 |= BTM_SM4_CONN_PEND;
        }
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_bond_cancel_complete
**
** Description      This function is called to report bond cancel complete
**                  event.
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_bond_cancel_complete (void)
{
    tBTM_SEC_DEV_REC *p_dev_rec;

    if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) ||
            (BTM_PAIR_STATE_WAIT_LOCAL_PIN == btm_cb.pairing_state &&
             BTM_PAIR_FLAGS_WE_STARTED_DD & btm_cb.pairing_flags) ||
            (btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME &&
             BTM_PAIR_FLAGS_WE_CANCEL_DD & btm_cb.pairing_flags)) {
        /* for dedicated bonding in legacy mode, authentication happens at "link level"
         * btm_sec_connected is called with failed status.
         * In theory, the code that handles is_pairing_device/TRUE should clean out security related code.
         * However, this function may clean out the security related flags and btm_sec_connected would not know
         * this function also needs to do proper clean up.
         */
        if ((p_dev_rec = btm_find_dev (btm_cb.pairing_bda)) != NULL) {
            p_dev_rec->security_required = BTM_SEC_NONE;
        }
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);

        /* Notify application that the cancel succeeded */
        if (btm_cb.api.p_bond_cancel_cmpl_callback) {
            btm_cb.api.p_bond_cancel_cmpl_callback(BTM_SUCCESS);
        }
    }
}
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_create_conn_cancel_complete
**
** Description      This function is called when the command complete message
**                  is received from the HCI for the create connection cancel
**                  command.
**
** Returns          void
**
*******************************************************************************/
void btm_create_conn_cancel_complete (UINT8 *p)
{
    UINT8       status;

    STREAM_TO_UINT8 (status, p);
    //BTM_TRACE_EVENT ("btm_create_conn_cancel_complete(): in State: %s  status:%d\n",
    //                 btm_pair_state_descr(btm_cb.pairing_state), status);

    /* if the create conn cancel cmd was issued by the bond cancel,
    ** the application needs to be notified that bond cancel succeeded
    */
    switch (status) {
    case HCI_SUCCESS:
#if (SMP_INCLUDED == TRUE)
        btm_sec_bond_cancel_complete();
#endif  ///SMP_INCLUDED == TRUE
        break;
    case HCI_ERR_CONNECTION_EXISTS:
    case HCI_ERR_NO_CONNECTION:
    default:
        /* Notify application of the error */
        if (btm_cb.api.p_bond_cancel_cmpl_callback) {
            btm_cb.api.p_bond_cancel_cmpl_callback(BTM_ERR_PROCESSING);
        }
        break;
    }
}

/*******************************************************************************
**
** Function         btm_sec_check_pending_reqs
**
** Description      This function is called at the end of the security procedure
**                  to let L2CAP and RFCOMM know to re-submit any pending requests
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_check_pending_reqs (void)
{
    tBTM_SEC_QUEUE_ENTRY    *p_e;
    fixed_queue_t *bq;

    if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) {
        /* First, resubmit L2CAP requests */
        if (btm_cb.sec_req_pending) {
            btm_cb.sec_req_pending = FALSE;
#if (CLASSIC_BT_INCLUDED == TRUE)
            l2cu_resubmit_pending_sec_req (NULL);
#endif  ///SMP_INCLUDED == TRUE
        }

        /* Now, re-submit anything in the mux queue */
        bq = btm_cb.sec_pending_q;

        btm_cb.sec_pending_q = fixed_queue_new(QUEUE_SIZE_MAX);


        while ((p_e = (tBTM_SEC_QUEUE_ENTRY *)fixed_queue_dequeue(bq, 0)) != NULL) {
            /* Check that the ACL is still up before starting security procedures */
            if (btm_bda_to_acl(p_e->bd_addr, p_e->transport) != NULL) {
                if (p_e->psm != 0) {
                    BTM_TRACE_EVENT("%s PSM:0x%04x Is_Orig:%u mx_proto_id:%u mx_chan_id:%u\n",
                                    __FUNCTION__, p_e->psm, p_e->is_orig,
                                    p_e->mx_proto_id, p_e->mx_chan_id);

                    btm_sec_mx_access_request (p_e->bd_addr, p_e->psm, p_e->is_orig,
                                               p_e->mx_proto_id, p_e->mx_chan_id,
                                               p_e->p_callback, p_e->p_ref_data);
                } else {
                    BTM_SetEncryption(p_e->bd_addr, p_e->transport, p_e->p_callback,
                                      p_e->p_ref_data);
                }
            }

            osi_free (p_e);
        }
        fixed_queue_free(bq, NULL);
    }
}
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_sec_init
**
** Description      This function is on the SEC startup
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_init (UINT8 sec_mode)
{
    btm_cb.security_mode = sec_mode;
    memset (btm_cb.pairing_bda, 0xff, BD_ADDR_LEN);
    btm_cb.max_collision_delay = BTM_SEC_MAX_COLLISION_DELAY;
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_device_down
**
** Description      This function should be called when device is disabled or
**                  turned off
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_device_down (void)
{
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("%s() State: %s\n", __func__, btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
}
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_sec_dev_reset
**
** Description      This function should be called after device reset
**
** Returns          void
**
*******************************************************************************/
void btm_sec_dev_reset (void)
{
    if (controller_get_interface()->supports_simple_pairing()) {
        /* set the default IO capabilities */
        btm_cb.devcb.loc_io_caps = BTM_LOCAL_IO_CAPS;
        /* add mx service to use no security */
        BTM_SetSecurityLevel(FALSE, "RFC_MUX\n", BTM_SEC_SERVICE_RFC_MUX,
                             BTM_SEC_NONE, BT_PSM_RFCOMM, BTM_SEC_PROTO_RFCOMM, 0);
    } else {
        btm_cb.security_mode = BTM_SEC_MODE_SERVICE;
    }

    BTM_TRACE_DEBUG ("btm_sec_dev_reset sec mode: %d\n", btm_cb.security_mode);
}

/*******************************************************************************
**
** Function         btm_sec_abort_access_req
**
** Description      This function is called by the L2CAP or RFCOMM to abort
**                  the pending operation.
**
** Parameters:      bd_addr       - Address of the peer device
**
** Returns          void
**
*******************************************************************************/
void btm_sec_abort_access_req (BD_ADDR bd_addr)
{
    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev (bd_addr);

    if (!p_dev_rec) {
        return;
    }

    if ((p_dev_rec->sec_state != BTM_SEC_STATE_AUTHORIZING)
            && (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING)) {
        return;
    }

    p_dev_rec->sec_state  = BTM_SEC_STATE_IDLE;
    p_dev_rec->p_callback = NULL;
}

/*******************************************************************************
**
** Function         btm_sec_dd_create_conn
**
** Description      This function is called to create the ACL connection for
**                  the dedicated boding process
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static tBTM_STATUS btm_sec_dd_create_conn (tBTM_SEC_DEV_REC *p_dev_rec)
{
    tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR);
    if (p_lcb && (p_lcb->link_state == LST_CONNECTED || p_lcb->link_state == LST_CONNECTING)) {
        BTM_TRACE_WARNING("%s Connection already exists\n", __func__);
        return BTM_CMD_STARTED;
    }

    /* Make sure an L2cap link control block is available */
    if (!p_lcb && (p_lcb = l2cu_allocate_lcb (p_dev_rec->bd_addr, TRUE, BT_TRANSPORT_BR_EDR)) == NULL) {
        BTM_TRACE_WARNING ("Security Manager: failed allocate LCB [%02x%02x%02x%02x%02x%02x]\n",
                           p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2],
                           p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]);

        return (BTM_NO_RESOURCES);
    }

    /* set up the control block to indicated dedicated bonding */
    btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE;

    if (l2cu_create_conn(p_lcb, BT_TRANSPORT_BR_EDR) == FALSE) {
        BTM_TRACE_WARNING ("Security Manager: failed create  [%02x%02x%02x%02x%02x%02x]\n",
                           p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2],
                           p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]);

        l2cu_release_lcb(p_lcb);
        return (BTM_NO_RESOURCES);
    }

    btm_acl_update_busy_level (BTM_BLI_PAGE_EVT);

    BTM_TRACE_DEBUG ("Security Manager: btm_sec_dd_create_conn [%02x%02x%02x%02x%02x%02x]\n",
                     p_dev_rec->bd_addr[0], p_dev_rec->bd_addr[1], p_dev_rec->bd_addr[2],
                     p_dev_rec->bd_addr[3], p_dev_rec->bd_addr[4], p_dev_rec->bd_addr[5]);

    btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_PIN_REQ);
    return (BTM_CMD_STARTED);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_rmt_name_request_complete
**
** Description      This function is called when remote name was obtained from
**                  the peer device
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_rmt_name_request_complete (UINT8 *p_bd_addr, UINT8 *p_bd_name, UINT8 status)
{
    tBTM_SEC_DEV_REC *p_dev_rec = NULL;
    int              i;
    DEV_CLASS        dev_class;
    UINT8            old_sec_state;
    UINT8            res;

    BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete\n");
    if (((p_bd_addr == NULL) && !BTM_ACL_IS_CONNECTED(btm_cb.connecting_bda))
            || ((p_bd_addr != NULL) && !BTM_ACL_IS_CONNECTED(p_bd_addr))) {
        btm_acl_resubmit_page();
    }

    /* If remote name request failed, p_bd_addr is null and we need to search */
    /* based on state assuming that we are doing 1 at a time */
    if (p_bd_addr) {
        p_dev_rec = btm_find_dev (p_bd_addr);
    } else {
	list_node_t *p_node = NULL;
        for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
            p_dev_rec = list_node(p_node);
            if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE)
                    && (p_dev_rec->sec_state == BTM_SEC_STATE_GETTING_NAME)) {
                p_bd_addr = p_dev_rec->bd_addr;
                break;
            }
	}
        if (!p_bd_addr) {
	    p_dev_rec = NULL;
	}
    }


    /* Commenting out trace due to obf/compilation problems.
    */
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    if (!p_bd_name) {
        p_bd_name = (UINT8 *)"";
    }

    if (p_dev_rec) {
        BTM_TRACE_EVENT ("Security Manager: rmt_name_complete PairState: %s  RemName: %s  status: %d State:%d  p_dev_rec: %p \n",
                         btm_pair_state_descr (btm_cb.pairing_state), p_bd_name,
                         status, p_dev_rec->sec_state, p_dev_rec);
    } else {
        BTM_TRACE_EVENT ("Security Manager: rmt_name_complete PairState: %s  RemName: %s  status: %d\n",
                         btm_pair_state_descr (btm_cb.pairing_state), p_bd_name,
                         status);
    }
#endif

    if (p_dev_rec) {
        old_sec_state = p_dev_rec->sec_state;
        if (status == HCI_SUCCESS) {
            BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, (char *)p_bd_name, BTM_MAX_REM_BD_NAME_LEN);
            p_dev_rec->sec_bd_name[BTM_MAX_REM_BD_NAME_LEN] = '\0';
            p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
            BTM_TRACE_EVENT ("setting BTM_SEC_NAME_KNOWN sec_flags:0x%x\n", p_dev_rec->sec_flags);
        } else {
            /* Notify all clients waiting for name to be resolved even if it failed so clients can continue */
            p_dev_rec->sec_bd_name[0] = '\0';
        }

        if (p_dev_rec->sec_state == BTM_SEC_STATE_GETTING_NAME) {
            p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
        }

        /* Notify all clients waiting for name to be resolved */
        for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
            if (btm_cb.p_rmt_name_callback[i] && p_bd_addr) {
                (*btm_cb.p_rmt_name_callback[i])(p_bd_addr, p_dev_rec->dev_class,
                                                 p_dev_rec->sec_bd_name);
            }
        }
    } else {
        dev_class[0] = 0;
        dev_class[1] = 0;
        dev_class[2] = 0;

        /* Notify all clients waiting for name to be resolved even if not found so clients can continue */
        for (i = 0; i < BTM_SEC_MAX_RMT_NAME_CALLBACKS; i++) {
            if (btm_cb.p_rmt_name_callback[i] && p_bd_addr) {
                (*btm_cb.p_rmt_name_callback[i])(p_bd_addr, dev_class, (UINT8 *)"");
            }
        }

        return;
    }

    /* If we were delaying asking UI for a PIN because name was not resolved, ask now */
    if ( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_LOCAL_PIN) && p_bd_addr
            &&  (memcmp (btm_cb.pairing_bda, p_bd_addr, BD_ADDR_LEN) == 0) ) {
        BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete() delayed pin now being requested flags:0x%x, (p_pin_callback=%p)\n", btm_cb.pairing_flags, btm_cb.api.p_pin_callback);

        if (((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) == 0) &&
                ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PIN_REQD) == 0) &&
                btm_cb.api.p_pin_callback) {
            BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete() calling pin_callback\n");
            btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD;
            (*btm_cb.api.p_pin_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class, p_bd_name,
                                          (p_dev_rec->p_cur_service == NULL) ? FALSE
                                          : (p_dev_rec->p_cur_service->security_flags & BTM_SEC_IN_MIN_16_DIGIT_PIN));
        }

        /* Set the same state again to force the timer to be restarted */
        btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN);
        return;
    }

    /* Check if we were delaying bonding because name was not resolved */
    if ( btm_cb.pairing_state == BTM_PAIR_STATE_GET_REM_NAME) {
        if (p_bd_addr && memcmp (btm_cb.pairing_bda, p_bd_addr, BD_ADDR_LEN) == 0) {
            BTM_TRACE_EVENT ("btm_sec_rmt_name_request_complete() continue bonding sm4: 0x%04x, status:0x%x\n", p_dev_rec->sm4, status);
            if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_CANCEL_DD) {
                btm_sec_bond_cancel_complete();
                return;
            }

            if (status != HCI_SUCCESS) {
                btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);

                if (btm_cb.api.p_auth_complete_callback)
                    (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,  p_dev_rec->dev_class,
                                                            p_dev_rec->sec_bd_name, status);
                return;
            }

            /* if peer is very old legacy devices, HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT is not reported */
            if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
                /* set the KNOWN flag only if BTM_PAIR_FLAGS_REJECTED_CONNECT is not set.*/
                /* If it is set, there may be a race condition */
                BTM_TRACE_DEBUG ("btm_sec_rmt_name_request_complete  IS_SM4_UNKNOWN Flags:0x%04x\n",
                                 btm_cb.pairing_flags);
                if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) == 0) {
                    p_dev_rec->sm4 |= BTM_SM4_KNOWN;
                }
            }

            BTM_TRACE_DEBUG("%s, SM4 Value: %x, Legacy:%d,IS SM4:%d, Unknown:%d\n", __FUNCTION__,
                            p_dev_rec->sm4, BTM_SEC_IS_SM4_LEGACY(p_dev_rec->sm4),
                            BTM_SEC_IS_SM4(p_dev_rec->sm4), BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4));

            /* BT 2.1 or carkit, bring up the connection to force the peer to request PIN.
            ** Else prefetch (btm_sec_check_prefetch_pin will do the prefetching if needed)
            */
            if ((p_dev_rec->sm4 != BTM_SM4_KNOWN) || !btm_sec_check_prefetch_pin(p_dev_rec)) {
                /* if we rejected incoming connection request, we have to wait HCI_Connection_Complete event */
                /*  before originating  */
                if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT) {
                    BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete: waiting HCI_Connection_Complete after rejecting connection\n");
                }
                /* Both we and the peer are 2.1 - continue to create connection */
                else if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) {
                    BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete: failed to start connection\n");

                    btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);

                    if (btm_cb.api.p_auth_complete_callback) {
                        (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,  p_dev_rec->dev_class,
                                                                p_dev_rec->sec_bd_name, HCI_ERR_MEMORY_FULL);
                    }
                }
            }
            return;
        } else {
            BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete: wrong BDA, retry with pairing BDA\n");

            BTM_ReadRemoteDeviceName (btm_cb.pairing_bda, NULL, BT_TRANSPORT_BR_EDR);
            return;
        }
    }

    /* check if we were delaying link_key_callback because name was not resolved */
    if (p_dev_rec->link_key_not_sent) {
        /* If HCI connection complete has not arrived, wait for it */
        if (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE) {
            return;
        }

        p_dev_rec->link_key_not_sent = FALSE;
        btm_send_link_key_notif(p_dev_rec);

        /* If its not us who perform authentication, we should tell stackserver */
        /* that some authentication has been completed                          */
        /* This is required when different entities receive link notification and auth complete */
        if (!(p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE)) {
            if (btm_cb.api.p_auth_complete_callback) {
                res = (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                              p_dev_rec->dev_class,
                                                              p_dev_rec->sec_bd_name, HCI_SUCCESS);
                if (res == BTM_SEC_DEV_REC_REMOVED) {
                    p_dev_rec = NULL;
                }
            }

        }
    }

    if(!p_dev_rec) {
        return;
    }

    /* If this is a bonding procedure can disconnect the link now */
    if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
            && (p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED)) {
        BTM_TRACE_WARNING ("btm_sec_rmt_name_request_complete (none/ce)\n");
        p_dev_rec->security_required &= ~(BTM_SEC_OUT_AUTHENTICATE);
        l2cu_start_post_bond_timer(p_dev_rec->hci_handle);
        return;
    }

    if (old_sec_state != BTM_SEC_STATE_GETTING_NAME) {
        return;
    }

    /* If get name failed, notify the waiting layer */
    if (status != HCI_SUCCESS) {
        btm_sec_dev_rec_cback_event  (p_dev_rec, BTM_ERR_PROCESSING, FALSE);
        return;
    }

    if (p_dev_rec->sm4 & BTM_SM4_REQ_PEND) {
        BTM_TRACE_EVENT ("waiting for remote features!!\n");
        return;
    }

    /* Remote Name succeeded, execute the next security procedure, if any */
    status = (UINT8)btm_sec_execute_procedure (p_dev_rec);

    /* If result is pending reply from the user or from the device is pending */
    if (status == BTM_CMD_STARTED) {
        return;
    }

    /* There is no next procedure or start of procedure failed, notify the waiting layer */
    btm_sec_dev_rec_cback_event  (p_dev_rec, status, FALSE);
}
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_sec_rmt_host_support_feat_evt
**
** Description      This function is called when the
**                  HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT is received
**
** Returns          void
**
*******************************************************************************/
void btm_sec_rmt_host_support_feat_evt (UINT8 *p)
{
    tBTM_SEC_DEV_REC *p_dev_rec;
    BD_ADDR         bd_addr;        /* peer address */
    BD_FEATURES     features;

    STREAM_TO_BDADDR (bd_addr, p);
    p_dev_rec = btm_find_or_alloc_dev (bd_addr);

    BTM_TRACE_EVENT ("btm_sec_rmt_host_support_feat_evt  sm4: 0x%x  p[0]: 0x%x\n", p_dev_rec->sm4, p[0]);

    if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
        p_dev_rec->sm4 = BTM_SM4_KNOWN;
        STREAM_TO_ARRAY(features, p, HCI_FEATURE_BYTES_PER_PAGE);
        if (HCI_SSP_HOST_SUPPORTED(features)) {
            p_dev_rec->sm4 = BTM_SM4_TRUE;
        }
        BTM_TRACE_EVENT ("btm_sec_rmt_host_support_feat_evt sm4: 0x%x features[0]: 0x%x\n", p_dev_rec->sm4, features[0]);
    }
}

/*******************************************************************************
**
** Function         btm_io_capabilities_req
**
** Description      This function is called when LM request for the IO
**                  capability of the local device and
**                  if the OOB data is present for the device in the event
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_io_capabilities_req (UINT8 *p)
{
    tBTM_SP_IO_REQ  evt_data;
    UINT8           err_code = 0;
    tBTM_SEC_DEV_REC *p_dev_rec;
    BOOLEAN         is_orig = TRUE;
    UINT8           callback_rc = BTM_SUCCESS;

    STREAM_TO_BDADDR (evt_data.bd_addr, p);

    /* setup the default response according to compile options */
    /* assume that the local IO capability does not change
     * loc_io_caps is initialized with the default value */
    evt_data.io_cap = btm_cb.devcb.loc_io_caps;
    evt_data.oob_data = BTM_OOB_NONE;
    evt_data.auth_req = BTM_DEFAULT_AUTH_REQ;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT("%s: State: %s\n", __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    p_dev_rec = btm_find_or_alloc_dev (evt_data.bd_addr);

    BTM_TRACE_DEBUG("%s:Security mode: %d, Num Read Remote Feat pages: %d\n", __FUNCTION__,
                    btm_cb.security_mode, p_dev_rec->num_read_pages);

    if ((btm_cb.security_mode == BTM_SEC_MODE_SC) && (p_dev_rec->num_read_pages == 0)) {
        BTM_TRACE_EVENT("%s: Device security mode is SC only.\n"
                        "To continue need to know remote features.\n", __FUNCTION__);

        p_dev_rec->remote_features_needed = TRUE;
        return;
    }

    p_dev_rec->sm4 |= BTM_SM4_TRUE;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT("%s: State: %s  Flags: 0x%04x  p_cur_service: %p\n",
                    __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state),
                    btm_cb.pairing_flags, p_dev_rec->p_cur_service);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    if (p_dev_rec->p_cur_service) {
        BTM_TRACE_EVENT("%s: cur_service psm: 0x%04x, security_flags: 0x%04x\n",
                        __FUNCTION__, p_dev_rec->p_cur_service->psm,
                        p_dev_rec->p_cur_service->security_flags);
    }

    switch (btm_cb.pairing_state) {
    /* initiator connecting */
    case BTM_PAIR_STATE_IDLE:
        //TODO: Handle Idle pairing state
        //security_required = p_dev_rec->security_required;
        break;

    /* received IO capability response already->acceptor */
    case BTM_PAIR_STATE_INCOMING_SSP:
        is_orig = FALSE;

        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_PEER_STARTED_DD) {
            /* acceptor in dedicated bonding */
            evt_data.auth_req = BTM_DEFAULT_DD_AUTH_REQ;
        }
        break;

    /* initiator, at this point it is expected to be dedicated bonding
    initiated by local device */
    case BTM_PAIR_STATE_WAIT_PIN_REQ:
        if (!memcmp (evt_data.bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN)) {
            evt_data.auth_req = BTM_DEFAULT_DD_AUTH_REQ;
        } else {
            err_code = HCI_ERR_HOST_BUSY_PAIRING;
        }
        break;

    /* any other state is unexpected */
    default:
        err_code = HCI_ERR_HOST_BUSY_PAIRING;
        BTM_TRACE_ERROR("%s: Unexpected Pairing state received %d\n", __FUNCTION__,
                        btm_cb.pairing_state);
        break;
    }

    if (btm_cb.pairing_disabled) {
        /* pairing is not allowed */
        BTM_TRACE_DEBUG("%s: Pairing is not allowed -> fail pairing.\n", __FUNCTION__);
        err_code = HCI_ERR_PAIRING_NOT_ALLOWED;
    } else if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
        BOOLEAN local_supports_sc = controller_get_interface()->supports_secure_connections();
        /* device in Secure Connections Only mode */
        if (!(local_supports_sc) || !(p_dev_rec->remote_supports_secure_connections)) {
            BTM_TRACE_DEBUG("%s: SC only service, local_support_for_sc %d,\n"
                            " remote_support_for_sc 0x%02x -> fail pairing\n", __FUNCTION__,
                            local_supports_sc, p_dev_rec->remote_supports_secure_connections);

            err_code = HCI_ERR_PAIRING_NOT_ALLOWED;
        }
    }

    if (err_code != 0) {
        /* coverity[uninit_use_in_call]
        Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp"
        False-positive: evt_data.bd_addr is set at the beginning with:     STREAM_TO_BDADDR (evt_data.bd_addr, p);
        */
        btsnd_hcic_io_cap_req_neg_reply(evt_data.bd_addr, err_code);
        return;
    }

    evt_data.is_orig = is_orig;

    if (is_orig) {
        /* local device initiated the pairing non-bonding -> use p_cur_service */
        if (!(btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) &&
                p_dev_rec->p_cur_service &&
                (p_dev_rec->p_cur_service->security_flags & BTM_SEC_OUT_AUTHENTICATE)) {
            if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
                /* SC only mode device requires MITM protection */
                evt_data.auth_req = BTM_AUTH_SP_YES;
            } else {
                evt_data.auth_req = (p_dev_rec->p_cur_service->security_flags &
                                     BTM_SEC_OUT_MITM) ? BTM_AUTH_SP_YES : BTM_AUTH_SP_NO;
            }
        }
    }

    /* Notify L2CAP to increase timeout */
    l2c_pin_code_request (evt_data.bd_addr);

    memcpy (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN);

    /* coverity[uninit_use_in_call]
    Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp"
    False-positive: False-positive: evt_data.bd_addr is set at the beginning with:     STREAM_TO_BDADDR (evt_data.bd_addr, p);
    */
    if (!memcmp (evt_data.bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN)) {
        memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
    }

    btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS);

    callback_rc = BTM_SUCCESS;
    if (p_dev_rec->sm4 & BTM_SM4_UPGRADE) {
        p_dev_rec->sm4 &= ~BTM_SM4_UPGRADE;

        /* link key upgrade: always use SPGB_YES - assuming we want to save the link key */
        evt_data.auth_req = BTM_AUTH_SPGB_YES;
    } else if (btm_cb.api.p_sp_callback) {
        /* the callback function implementation may change the IO capability... */
        callback_rc = (*btm_cb.api.p_sp_callback) (BTM_SP_IO_REQ_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
    }

#if BTM_OOB_INCLUDED == TRUE
    if ((callback_rc == BTM_SUCCESS) || (BTM_OOB_UNKNOWN != evt_data.oob_data))
#else
    if (callback_rc == BTM_SUCCESS)
#endif
    {
        if ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)) {
            evt_data.auth_req = (BTM_AUTH_DD_BOND | (evt_data.auth_req & BTM_AUTH_YN_BIT));
        }

        if (btm_cb.security_mode == BTM_SEC_MODE_SC) {
            /* At this moment we know that both sides are SC capable, device in */
            /* SC only mode requires MITM for any service so let's set MITM bit */
            evt_data.auth_req |= BTM_AUTH_YN_BIT;
            BTM_TRACE_DEBUG("%s: for device in \"SC only\" mode set auth_req to 0x%02x\n",
                            __FUNCTION__, evt_data.auth_req);
        }

        /* if the user does not indicate "reply later" by setting the oob_data to unknown */
        /* send the response right now. Save the current IO capability in the control block */
        btm_cb.devcb.loc_auth_req   = evt_data.auth_req;
        btm_cb.devcb.loc_io_caps    = evt_data.io_cap;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_EVENT("%s: State: %s  IO_CAP:%d oob_data:%d auth_req:%d",
                        __FUNCTION__, btm_pair_state_descr(btm_cb.pairing_state), evt_data.io_cap,
                        evt_data.oob_data, evt_data.auth_req);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        btsnd_hcic_io_cap_req_reply(evt_data.bd_addr, evt_data.io_cap,
                                    evt_data.oob_data, evt_data.auth_req);
    }
}

/*******************************************************************************
**
** Function         btm_io_capabilities_rsp
**
** Description      This function is called when the IO capability of the
**                  specified device is received
**
** Returns          void
**
*******************************************************************************/
void btm_io_capabilities_rsp (UINT8 *p)
{
    tBTM_SEC_DEV_REC *p_dev_rec;
    tBTM_SP_IO_RSP evt_data;

    STREAM_TO_BDADDR (evt_data.bd_addr, p);
    STREAM_TO_UINT8 (evt_data.io_cap, p);
    STREAM_TO_UINT8 (evt_data.oob_data, p);
    STREAM_TO_UINT8 (evt_data.auth_req, p);

    /* Allocate a new device record or reuse the oldest one */
    p_dev_rec = btm_find_or_alloc_dev (evt_data.bd_addr);

    /* If no security is in progress, this indicates incoming security */
    if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) {
        memcpy (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN);

        btm_sec_change_pairing_state (BTM_PAIR_STATE_INCOMING_SSP);

        /* Make sure we reset the trusted mask to help against attacks */
        BTM_SEC_CLR_TRUSTED_DEVICE(p_dev_rec->trusted_mask);

        /* work around for FW bug */
        btm_inq_stop_on_ssp();
    }

    /* Notify L2CAP to increase timeout */
    l2c_pin_code_request (evt_data.bd_addr);

    /* We must have a device record here.
     * Use the connecting device's CoD for the connection */
    /* coverity[uninit_use_in_call]
    Event uninit_use_in_call: Using uninitialized element of array "evt_data.bd_addr" in call to function "memcmp"
    FALSE-POSITIVE error from Coverity test-tool. evt_data.bd_addr is set at the beginning with:     STREAM_TO_BDADDR (evt_data.bd_addr, p);
    */
    if (!memcmp (evt_data.bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN)) {
        memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
    }

    /* peer sets dedicated bonding bit and we did not initiate dedicated bonding */
    if (btm_cb.pairing_state == BTM_PAIR_STATE_INCOMING_SSP /* peer initiated bonding */
            && (evt_data.auth_req & BTM_AUTH_DD_BOND) ) {          /* and dedicated bonding bit is set */
        btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PEER_STARTED_DD;
    }

    /* save the IO capability in the device record */
    p_dev_rec->rmt_io_caps  = evt_data.io_cap;
    p_dev_rec->rmt_auth_req = evt_data.auth_req;

    if (btm_cb.api.p_sp_callback) {
        (*btm_cb.api.p_sp_callback) (BTM_SP_IO_RSP_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
    }
}

/*******************************************************************************
**
** Function         btm_proc_sp_req_evt
**
** Description      This function is called to process/report
**                  HCI_USER_CONFIRMATION_REQUEST_EVT
**                  or HCI_USER_PASSKEY_REQUEST_EVT
**                  or HCI_USER_PASSKEY_NOTIFY_EVT
**
** Returns          void
**
*******************************************************************************/
void btm_proc_sp_req_evt (tBTM_SP_EVT event, UINT8 *p)
{
    tBTM_STATUS status = BTM_ERR_PROCESSING;
    tBTM_SP_EVT_DATA evt_data;
    UINT8               *p_bda = evt_data.cfm_req.bd_addr;
    tBTM_SEC_DEV_REC *p_dev_rec;

    /* All events start with bd_addr */
    STREAM_TO_BDADDR (p_bda, p);
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("btm_proc_sp_req_evt() BDA: %08x%04x event: 0x%x, State: %s\n",
                     (p_bda[0] << 24) + (p_bda[1] << 16) + (p_bda[2] << 8) + p_bda[3], (p_bda[4] << 8) + p_bda[5],
                     event, btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    if ( ((p_dev_rec = btm_find_dev (p_bda)) != NULL)
            &&  (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            &&  (memcmp (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN) == 0) ) {
        memcpy (evt_data.cfm_req.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
        memcpy (evt_data.cfm_req.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);

        BCM_STRCPY_S ((char *)evt_data.cfm_req.bd_name,(char *)p_dev_rec->sec_bd_name);

        switch (event) {
        case BTM_SP_CFM_REQ_EVT:
            /* Numeric confirmation. Need user to conf the passkey */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM);

            /* The device record must be allocated in the "IO cap exchange" step */
            STREAM_TO_UINT32 (evt_data.cfm_req.num_val, p);

            evt_data.cfm_req.just_works = TRUE;

            /* process user confirm req in association with the auth_req param */
// #if (BTM_LOCAL_IO_CAPS == BTM_IO_CAP_IO)
            if ( (p_dev_rec->rmt_io_caps == BTM_IO_CAP_IO)
                    &&  (btm_cb.devcb.loc_io_caps == BTM_IO_CAP_IO)
                    &&  ((p_dev_rec->rmt_auth_req & BTM_AUTH_SP_YES) || (btm_cb.devcb.loc_auth_req & BTM_AUTH_SP_YES)) ) {
                /* Both devices are DisplayYesNo and one or both devices want to authenticate
                   -> use authenticated link key */
                evt_data.cfm_req.just_works = FALSE;
            }
// #endif
            BTM_TRACE_DEBUG ("btm_proc_sp_req_evt()  just_works:%d, io loc:%d, rmt:%d, auth loc:%d, rmt:%d\n",
                             evt_data.cfm_req.just_works, btm_cb.devcb.loc_io_caps, p_dev_rec->rmt_io_caps,
                             btm_cb.devcb.loc_auth_req, p_dev_rec->rmt_auth_req);

            evt_data.cfm_req.loc_auth_req   = btm_cb.devcb.loc_auth_req;
            evt_data.cfm_req.rmt_auth_req   = p_dev_rec->rmt_auth_req;
            evt_data.cfm_req.loc_io_caps    = btm_cb.devcb.loc_io_caps;
            evt_data.cfm_req.rmt_io_caps    = p_dev_rec->rmt_io_caps;
            break;

        case BTM_SP_KEY_NOTIF_EVT:
            /* Passkey notification (other side is a keyboard) */
            STREAM_TO_UINT32 (evt_data.key_notif.passkey, p);

            BTM_TRACE_DEBUG ("BTM_SP_KEY_NOTIF_EVT:  passkey: %u\n", evt_data.key_notif.passkey);

            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
            break;

#if (BT_SSP_INCLUDED == TRUE)
        case BTM_SP_KEY_REQ_EVT:
            /* HCI_USER_PASSKEY_REQUEST_EVT */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_KEY_ENTRY);
            break;
#endif
        }

        if (btm_cb.api.p_sp_callback) {
            status = (*btm_cb.api.p_sp_callback) (event, (tBTM_SP_EVT_DATA *)&evt_data);
            if (status != BTM_NOT_AUTHORIZED) {
                return;
            }
            /* else BTM_NOT_AUTHORIZED means when the app wants to reject the req right now */
        } else if ( (event == BTM_SP_CFM_REQ_EVT) && (evt_data.cfm_req.just_works == TRUE) ) {
            /* automatically reply with just works if no sp_cback */
            status = BTM_SUCCESS;
        }

        if (event == BTM_SP_CFM_REQ_EVT) {
            BTM_TRACE_DEBUG ("calling BTM_ConfirmReqReply with status: %d\n", status);
            BTM_ConfirmReqReply (status, p_bda);
        }
#if (BT_SSP_INCLUDED == TRUE)
        else if (event == BTM_SP_KEY_REQ_EVT) {
            BTM_PasskeyReqReply(status, p_bda, 0);
        }
#endif
        return;
    }
    /* Something bad. we can only fail this connection */
    btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;

    if (BTM_SP_CFM_REQ_EVT == event) {
        btsnd_hcic_user_conf_reply (p_bda, FALSE);
    } else if (BTM_SP_KEY_NOTIF_EVT == event) {
        /* do nothing -> it very unlikely to happen.
        This event is most likely to be received by a HID host when it first connects to a HID device.
        Usually the Host initiated the connection in this case.
        On Mobile platforms, if there's a security process happening,
        the host probably can not initiate another connection.
        BTW (PC) is another story.  */
        if (NULL != (p_dev_rec = btm_find_dev (p_bda)) ) {
            btm_sec_disconnect (p_dev_rec->hci_handle, HCI_ERR_AUTH_FAILURE);
        }
    }

#if (BT_SSP_INCLUDED == TRUE)
    else {
        btsnd_hcic_user_passkey_neg_reply(p_bda);
    }
#endif
}


/*******************************************************************************
**
** Function         btm_keypress_notif_evt
**
** Description      This function is called when a key press notification is
**                  received
**
** Returns          void
**
*******************************************************************************/
void  btm_keypress_notif_evt (UINT8 *p)
{
    tBTM_SP_KEYPRESS    evt_data;
    UINT8 *p_bda;

    /* parse & report BTM_SP_KEYPRESS_EVT */
    if (btm_cb.api.p_sp_callback) {
        p_bda = evt_data.bd_addr;

        STREAM_TO_BDADDR (p_bda, p);
        evt_data.notif_type = *p;

        (*btm_cb.api.p_sp_callback) (BTM_SP_KEYPRESS_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
    }
}

/*******************************************************************************
**
** Function         btm_simple_pair_complete
**
** Description      This function is called when simple pairing process is
**                  complete
**
** Returns          void
**
*******************************************************************************/
void btm_simple_pair_complete (UINT8 *p)
{
    tBTM_SP_COMPLT  evt_data;
    tBTM_SEC_DEV_REC *p_dev_rec;
    UINT8           status;
    BOOLEAN         disc = FALSE;

    status = *p++;
    STREAM_TO_BDADDR (evt_data.bd_addr, p);

    if ((p_dev_rec = btm_find_dev (evt_data.bd_addr)) == NULL) {
        BTM_TRACE_ERROR ("btm_simple_pair_complete() with unknown BDA: %08x%04x\n",
                         (evt_data.bd_addr[0] << 24) + (evt_data.bd_addr[1] << 16) + (evt_data.bd_addr[2] << 8) + evt_data.bd_addr[3],
                         (evt_data.bd_addr[4] << 8) + evt_data.bd_addr[5]);
        return;
    }
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("btm_simple_pair_complete()  Pair State: %s  Status:%d  sec_state: %u\n",
                     btm_pair_state_descr(btm_cb.pairing_state),  status, p_dev_rec->sec_state);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    evt_data.status = BTM_ERR_PROCESSING;
    if (status == HCI_SUCCESS) {
        evt_data.status = BTM_SUCCESS;
        p_dev_rec->sec_flags |= BTM_SEC_AUTHENTICATED;
    } else {
        if (status == HCI_ERR_PAIRING_NOT_ALLOWED) {
            /* The test spec wants the peer device to get this failure code. */
            btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_DISCONNECT);

            /* Change the timer to 1 second */
            btu_start_timer (&btm_cb.pairing_tle, BTU_TTYPE_USER_FUNC, BT_1SEC_TIMEOUT);
        } else if (memcmp (btm_cb.pairing_bda, evt_data.bd_addr, BD_ADDR_LEN) == 0) {
            /* stop the timer */
            btu_stop_timer (&btm_cb.pairing_tle);

            if (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING) {
                /* the initiating side: will receive auth complete event. disconnect ACL at that time */
                disc = TRUE;
            }
        } else {
            disc = TRUE;
        }
    }

    /* Let the pairing state stay active, p_auth_complete_callback will report the failure */
    memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
    memcpy (evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);

    if (btm_cb.api.p_sp_callback) {
        (*btm_cb.api.p_sp_callback) (BTM_SP_COMPLT_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
    }

    if (disc) {
        /* simple pairing failed */
        /* Avoid sending disconnect on HCI_ERR_PEER_USER */
        if ((status != HCI_ERR_PEER_USER) && (status != HCI_ERR_CONN_CAUSE_LOCAL_HOST)) {
            btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle);
        }
    }
}
#endif   ///SMP_INCLUDED == TRUE


#if BTM_OOB_INCLUDED == TRUE && SMP_INCLUDED == TRUE
/*******************************************************************************
**
** Function         btm_rem_oob_req
**
** Description      This function is called to process/report
**                  HCI_REMOTE_OOB_DATA_REQUEST_EVT
**
** Returns          void
**
*******************************************************************************/
void btm_rem_oob_req (UINT8 *p)
{
    UINT8 *p_bda;
    tBTM_SP_RMT_OOB  evt_data;
    tBTM_SEC_DEV_REC *p_dev_rec;
    BT_OCTET16      c;
    BT_OCTET16      r;

    p_bda = evt_data.bd_addr;

    STREAM_TO_BDADDR (p_bda, p);

    BTM_TRACE_EVENT ("btm_rem_oob_req() BDA: %02x:%02x:%02x:%02x:%02x:%02x\n",
                     p_bda[0], p_bda[1], p_bda[2], p_bda[3], p_bda[4], p_bda[5]);

    if ( (NULL != (p_dev_rec = btm_find_dev (p_bda))) &&
            btm_cb.api.p_sp_callback) {
        memcpy (evt_data.bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
        memcpy (evt_data.dev_class, p_dev_rec->dev_class, DEV_CLASS_LEN);
        BCM_STRNCPY_S((char *)evt_data.bd_name, (char *)p_dev_rec->sec_bd_name, BTM_MAX_REM_BD_NAME_LEN);
        evt_data.bd_name[BTM_MAX_REM_BD_NAME_LEN] = '\0';

        btm_sec_change_pairing_state(BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP);
        if ((*btm_cb.api.p_sp_callback) (BTM_SP_RMT_OOB_EVT, (tBTM_SP_EVT_DATA *)&evt_data) == BTM_NOT_AUTHORIZED) {
            BTM_RemoteOobDataReply(TRUE, p_bda, c, r);
        }
        return;
    }

    /* something bad. we can only fail this connection */
    btm_cb.acl_disc_reason = HCI_ERR_HOST_REJECT_SECURITY;
    btsnd_hcic_rem_oob_neg_reply (p_bda);
}

/*******************************************************************************
**
** Function         btm_read_local_oob_complete
**
** Description      This function is called when read local oob data is
**                  completed by the LM
**
** Returns          void
**
*******************************************************************************/
void btm_read_local_oob_complete (UINT8 *p)
{
    tBTM_SP_LOC_OOB evt_data;
    UINT8           status = *p++;

    BTM_TRACE_EVENT ("btm_read_local_oob_complete:%d\n", status);
    if (status == HCI_SUCCESS) {
        evt_data.status = BTM_SUCCESS;
        STREAM_TO_ARRAY16(evt_data.c, p);
        STREAM_TO_ARRAY16(evt_data.r, p);
    } else {
        evt_data.status = BTM_ERR_PROCESSING;
    }

    if (btm_cb.api.p_sp_callback) {
        (*btm_cb.api.p_sp_callback) (BTM_SP_LOC_OOB_EVT, (tBTM_SP_EVT_DATA *)&evt_data);
    }
}
#endif /* BTM_OOB_INCLUDED */

/*******************************************************************************
**
** Function         btm_sec_auth_collision
**
** Description      This function is called when authentication or encryption
**                  needs to be retried at a later time.
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_auth_collision (UINT16 handle)
{
    tBTM_SEC_DEV_REC *p_dev_rec;

    if (!btm_cb.collision_start_time) {
        btm_cb.collision_start_time = osi_time_get_os_boottime_ms();
    }

    if ((osi_time_get_os_boottime_ms() - btm_cb.collision_start_time) < btm_cb.max_collision_delay)
    {
        if (handle == BTM_SEC_INVALID_HANDLE)
        {
            if ((p_dev_rec = btm_sec_find_dev_by_sec_state (BTM_SEC_STATE_AUTHENTICATING)) == NULL) {
                p_dev_rec = btm_sec_find_dev_by_sec_state (BTM_SEC_STATE_ENCRYPTING);
            }
        } else {
            p_dev_rec = btm_find_dev_by_handle (handle);
        }

        if (p_dev_rec != NULL) {
            BTM_TRACE_DEBUG ("btm_sec_auth_collision: state %d (retrying in a moment...)\n", p_dev_rec->sec_state);
            /* We will restart authentication after timeout */
            if (p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING || p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING) {
                p_dev_rec->sec_state = 0;
            }

            btm_cb.p_collided_dev_rec = p_dev_rec;
            btm_cb.sec_collision_tle.param = (UINT32) btm_sec_collision_timeout;
            btu_start_timer (&btm_cb.sec_collision_tle, BTU_TTYPE_USER_FUNC, BT_1SEC_TIMEOUT);
        }
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_auth_complete
**
** Description      This function is when authentication of the connection is
**                  completed by the LM
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_auth_complete (UINT16 handle, UINT8 status)
{
    UINT8 res;
    UINT8            old_sm4;
    tBTM_PAIRING_STATE  old_state   = btm_cb.pairing_state;
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle);
    BOOLEAN             are_bonding = FALSE;

    /* Commenting out trace due to obf/compilation problems.
    */
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    if (p_dev_rec) {
        BTM_TRACE_EVENT ("Security Manager: auth_complete PairState: %s  handle:%u  status:%d  dev->sec_state: %u  Bda:%08x, RName:%s\n",
                         btm_pair_state_descr (btm_cb.pairing_state),
                         handle, status,
                         p_dev_rec->sec_state,
                         (p_dev_rec->bd_addr[2] << 24) + (p_dev_rec->bd_addr[3] << 16) + (p_dev_rec->bd_addr[4] << 8) + p_dev_rec->bd_addr[5],
                         p_dev_rec->sec_bd_name);
    } else {
        BTM_TRACE_EVENT ("Security Manager: auth_complete PairState: %s  handle:%u  status:%d\n",
                         btm_pair_state_descr (btm_cb.pairing_state),
                         handle, status);
    }
#endif

    /* For transaction collision we need to wait and repeat.  There is no need */
    /* for random timeout because only slave should receive the result */
    if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) || (status == HCI_ERR_DIFF_TRANSACTION_COLLISION)) {
        btm_sec_auth_collision(handle);
        return;
    }
    btm_cb.collision_start_time = 0;

    btm_restore_mode();

    /* Check if connection was made just to do bonding.  If we authenticate
       the connection that is up, this is the last event received.
    */
    if (p_dev_rec
            && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
            && !(btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE)) {
        p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;

        l2cu_start_post_bond_timer (p_dev_rec->hci_handle);
    }

    if (!p_dev_rec) {
        return;
    }

    /* keep the old sm4 flag and clear the retry bit in control block */
    old_sm4 = p_dev_rec->sm4;
    p_dev_rec->sm4 &= ~BTM_SM4_RETRY;

    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            &&  (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD)
            &&  (memcmp (p_dev_rec->bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) ) {
        are_bonding = TRUE;
    }

    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            &&  (memcmp (p_dev_rec->bd_addr, btm_cb.pairing_bda, BD_ADDR_LEN) == 0) ) {
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
    }

    if (p_dev_rec->sec_state != BTM_SEC_STATE_AUTHENTICATING) {
        if ( (btm_cb.api.p_auth_complete_callback && status != HCI_SUCCESS)
                &&  (old_state != BTM_PAIR_STATE_IDLE) ) {
            (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                    p_dev_rec->dev_class,
                                                    p_dev_rec->sec_bd_name, status);
        }
        return;
    }

    /* There can be a race condition, when we are starting authentication and
    ** the peer device is doing encryption.
    ** If first we receive encryption change up, then initiated authentication
    ** can not be performed.  According to the spec we can not do authentication
    ** on the encrypted link, so device is correct.
    */
    if ((status == HCI_ERR_COMMAND_DISALLOWED)
            && ((p_dev_rec->sec_flags & (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED)) ==
                (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED))) {
        status = HCI_SUCCESS;
    }

    /* Currently we do not notify user if it is a keyboard which connects */
    /* User probably Disabled the keyboard while it was asleep.  Let her try */
    if (btm_cb.api.p_auth_complete_callback) {
        /* report the authentication status */
        if (old_state != BTM_PAIR_STATE_IDLE) {
            res = (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                          p_dev_rec->dev_class,
                                                          p_dev_rec->sec_bd_name, status);
            if (res == BTM_SEC_DEV_REC_REMOVED) {
                p_dev_rec = NULL;
            }
        }
    }

    if(!p_dev_rec) {
        return;
    }

    p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;

#if (CLASSIC_BT_INCLUDED == TRUE)
    btm_sec_update_legacy_auth_state(btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR), BTM_ACL_LEGACY_AUTH_SELF);
#endif
    /* If this is a bonding procedure can disconnect the link now */
    if (are_bonding) {
        p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;

        if (status != HCI_SUCCESS) {
            if (((status != HCI_ERR_PEER_USER) && (status != HCI_ERR_CONN_CAUSE_LOCAL_HOST))) {
                btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_PEER_USER, p_dev_rec->hci_handle);
            }
        } else {
            BTM_TRACE_DEBUG ("TRYING TO DECIDE IF CAN USE SMP_BR_CHNL\n");
            if (p_dev_rec->new_encryption_key_is_p256 && (btm_sec_use_smp_br_chnl(p_dev_rec))
                    /* no LE keys are available, do deriving */
                    && (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN) ||
                        /* or BR key is higher security than existing LE keys */
                        (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED) &&
                         (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)))) {
                BTM_TRACE_DEBUG ("link encrypted afer dedic bonding can use SMP_BR_CHNL\n");

                if (btm_sec_is_master(p_dev_rec)) {
                    // Encryption is required to start SM over BR/EDR
                    // indicate that this is encryption after authentication
                    BTM_SetEncryption(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR, NULL, NULL);
                }
            }
            l2cu_start_post_bond_timer (p_dev_rec->hci_handle);
        }

        return;
    }

    /* If authentication failed, notify the waiting layer */
    if (status != HCI_SUCCESS) {
        if ((old_sm4 & BTM_SM4_RETRY) == 0) {
            /* allow retry only once */
            if (status == HCI_ERR_LMP_ERR_TRANS_COLLISION) {
                /* not retried yet. set the retry bit */
                p_dev_rec->sm4 |= BTM_SM4_RETRY;
                BTM_TRACE_DEBUG ("Collision retry sm4:x%x sec_flags:0x%x\n", p_dev_rec->sm4, p_dev_rec->sec_flags);
            }
            /* this retry for missing key is for Lisbon or later only.
             * Legacy device do not need this. the controller will drive the retry automatically */
            else if (HCI_ERR_KEY_MISSING == status && BTM_SEC_IS_SM4(p_dev_rec->sm4)) {
                /* not retried yet. set the retry bit */
                p_dev_rec->sm4 |= BTM_SM4_RETRY;
                p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN;
                BTM_TRACE_DEBUG ("Retry for missing key sm4:x%x sec_flags:0x%x\n", p_dev_rec->sm4, p_dev_rec->sec_flags);

                /* With BRCM controller, we do not need to delete the stored link key in controller.
                If the stack may sit on top of other controller, we may need this
                BTM_DeleteStoredLinkKey (bd_addr, NULL); */
            }

            if (p_dev_rec->sm4 & BTM_SM4_RETRY) {
                btm_sec_execute_procedure (p_dev_rec);
                return;
            }
        }

        btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE);

        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_DISC_WHEN_DONE) {
            btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle);
        }
        return;
    }

    p_dev_rec->sec_flags |= BTM_SEC_AUTHENTICATED;

    if (p_dev_rec->pin_code_length >= 16 ||
            p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
            p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
        // If we have MITM protection we have a higher level of security than
        // provided by 16 digits PIN
        p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
    }

    /* Authentication succeeded, execute the next security procedure, if any */
    status = btm_sec_execute_procedure (p_dev_rec);

    /* If there is no next procedure, or procedure failed to start, notify the caller */
    if (status != BTM_CMD_STARTED) {
        btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE);
    }
}
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_sec_encrypt_change
**
** Description      This function is when encryption of the connection is
**                  completed by the LM
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_encrypt_change (UINT16 handle, UINT8 status, UINT8 encr_enable)
{
    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev_by_handle (handle);
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    tACL_CONN       *p_acl = NULL;
#endif
    BTM_TRACE_EVENT ("Security Manager: encrypt_change status:%d State:%d, encr_enable = %d\n",
                     status, (p_dev_rec) ? p_dev_rec->sec_state : 0, encr_enable);
    BTM_TRACE_DEBUG ("before update p_dev_rec->sec_flags=0x%x\n", (p_dev_rec) ? p_dev_rec->sec_flags : 0 );

    /* For transaction collision we need to wait and repeat.  There is no need */
    /* for random timeout because only slave should receive the result */
    if ((status == HCI_ERR_LMP_ERR_TRANS_COLLISION) ||
            (status == HCI_ERR_DIFF_TRANSACTION_COLLISION)) {
        btm_sec_auth_collision(handle);
        return;
    }
    btm_cb.collision_start_time = 0;

    if (!p_dev_rec) {
        return;
    }

    if ((status == HCI_SUCCESS) && encr_enable) {
        if (p_dev_rec->hci_handle == handle) {
            p_dev_rec->sec_flags |= (BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED);
            if (p_dev_rec->pin_code_length >= 16 ||
                    p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
                    p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
                p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
            }
        } else {
            p_dev_rec->sec_flags |= BTM_SEC_LE_ENCRYPTED;
        }
    }

    /* It is possible that we decrypted the link to perform role switch */
    /* mark link not to be encrypted, so that when we execute security next time it will kick in again */
    if ((status == HCI_SUCCESS) && !encr_enable) {
        if (p_dev_rec->hci_handle == handle) {
            p_dev_rec->sec_flags &= ~BTM_SEC_ENCRYPTED;
        } else {
            p_dev_rec->sec_flags &= ~BTM_SEC_LE_ENCRYPTED;
        }
    }

    BTM_TRACE_DEBUG ("after update p_dev_rec->sec_flags=0x%x\n", p_dev_rec->sec_flags );

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    p_acl = btm_handle_to_acl(handle);

    if (p_acl != NULL) {
        btm_sec_check_pending_enc_req(p_dev_rec, p_acl->transport, encr_enable);
    }

    if (p_acl && p_acl->transport == BT_TRANSPORT_LE) {
        if (status == HCI_ERR_KEY_MISSING || status == HCI_ERR_AUTH_FAILURE ||
                status == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE) {
            p_dev_rec->sec_flags &= ~ (BTM_SEC_LE_LINK_KEY_KNOWN);
            p_dev_rec->ble.key_type = BTM_LE_KEY_NONE;
        }
        btm_ble_link_encrypted(p_dev_rec->ble.pseudo_addr, encr_enable);
        return;
    } else {
        /* BR/EDR connection, update the encryption key size to be 16 as always */
        p_dev_rec->enc_key_size = 16;
    }

    BTM_TRACE_DEBUG ("in %s new_encr_key_256 is %d\n",
                     __func__, p_dev_rec->new_encryption_key_is_p256);

    if ((status == HCI_SUCCESS) && encr_enable && (p_dev_rec->hci_handle == handle)) {
        if (p_dev_rec->new_encryption_key_is_p256) {
            if (btm_sec_use_smp_br_chnl(p_dev_rec) &&
                    btm_sec_is_master(p_dev_rec) &&
                    /* if LE key is not known, do deriving */
                    (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN) ||
                     /* or BR key is higher security than existing LE keys */
                     (!(p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_AUTHED)
                      && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)))) {
                /* BR/EDR is encrypted with LK that can be used to derive LE LTK */
                p_dev_rec->new_encryption_key_is_p256 = FALSE;

                if (p_dev_rec->no_smp_on_br) {
                    BTM_TRACE_DEBUG ("%s NO SM over BR/EDR\n", __func__);
                } else {
#if (CLASSIC_BT_INCLUDED == TRUE)
                    BTM_TRACE_DEBUG ("%s start SM over BR/EDR\n", __func__);
                    SMP_BR_PairWith(p_dev_rec->bd_addr);
#endif  ///CLASSIC_BT_INCLUDED == TRUE
                }
            }
        } else {
            // BR/EDR is successfully encrypted. Correct LK type if needed
            // (BR/EDR LK derived from LE LTK was used for encryption)
            if ((encr_enable == 1)  && /* encryption is ON for SSP */
                    /* LK type is for BR/EDR SC */
                    (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256 ||
                     p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
                if (p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256) {
                    p_dev_rec->link_key_type = BTM_LKEY_TYPE_UNAUTH_COMB;
                } else { /* BTM_LKEY_TYPE_AUTH_COMB_P_256 */
                    p_dev_rec->link_key_type = BTM_LKEY_TYPE_AUTH_COMB;
                }

                BTM_TRACE_DEBUG("updated link key type to %d\n", p_dev_rec->link_key_type);
                btm_send_link_key_notif(p_dev_rec);
            }
        }
    }
#else
    btm_sec_check_pending_enc_req (p_dev_rec, BT_TRANSPORT_BR_EDR, encr_enable);
#endif /* BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE */

    /* If this encryption was started by peer do not need to do anything */
    if (p_dev_rec->sec_state != BTM_SEC_STATE_ENCRYPTING) {
        if (BTM_SEC_STATE_DELAY_FOR_ENC == p_dev_rec->sec_state) {
            p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
            p_dev_rec->p_callback = NULL;
#if (CLASSIC_BT_INCLUDED == TRUE)
            l2cu_resubmit_pending_sec_req (p_dev_rec->bd_addr);
#endif  ///CLASSIC_BT_INCLUDED == TRUE
        }
        return;
    }

    p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
    /* If encryption setup failed, notify the waiting layer */
    if (status != HCI_SUCCESS) {
        btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE);
        return;
    }

    /* Encryption setup succeeded, execute the next security procedure, if any */
    status = (UINT8)btm_sec_execute_procedure (p_dev_rec);
    /* If there is no next procedure, or procedure failed to start, notify the caller */
    if (status != BTM_CMD_STARTED) {
        btm_sec_dev_rec_cback_event (p_dev_rec, status, FALSE);
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_connect_after_reject_timeout
**
** Description      Connection for bonding could not start because of the collision
**                  Initiate outgoing connection
**
** Returns          Pointer to the TLE struct
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_connect_after_reject_timeout (TIMER_LIST_ENT *p_tle)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_cb.p_collided_dev_rec;
    UNUSED(p_tle);

    BTM_TRACE_EVENT ("btm_sec_connect_after_reject_timeout()\n");
    btm_cb.sec_collision_tle.param = 0;
    btm_cb.p_collided_dev_rec = 0;

    if (btm_sec_dd_create_conn(p_dev_rec) != BTM_CMD_STARTED) {
        BTM_TRACE_WARNING ("Security Manager: btm_sec_connect_after_reject_timeout: failed to start connection\n");

        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);

        if (btm_cb.api.p_auth_complete_callback) {
            (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,  p_dev_rec->dev_class,
                                                    p_dev_rec->sec_bd_name, HCI_ERR_MEMORY_FULL);
        }
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_connected
**
** Description      This function is when a connection to the peer device is
**                  establsihed
**
** Returns          void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
void btm_sec_connected (UINT8 *bda, UINT16 handle, UINT8 status, UINT8 enc_mode)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda);
    UINT8            res;
    UINT8            sec_dev_rec_status;
    BOOLEAN          is_pairing_device = FALSE;
    tACL_CONN        *p_acl_cb;
    UINT8            bit_shift = 0;

    btm_acl_resubmit_page();

    /* Commenting out trace due to obf/compilation problems.
    */
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    if (p_dev_rec) {
        BTM_TRACE_EVENT ("Security Manager: btm_sec_connected in state: %s  handle:%d status:%d enc_mode:%d  bda:%x RName:%s\n",
                         btm_pair_state_descr(btm_cb.pairing_state), handle, status, enc_mode,
                         (bda[2] << 24) + (bda[3] << 16) + (bda[4] << 8) + bda[5],
                         p_dev_rec->sec_bd_name);
    } else {
        BTM_TRACE_EVENT ("Security Manager: btm_sec_connected in state: %s  handle:%d status:%d enc_mode:%d  bda:%x \n",
                         btm_pair_state_descr(btm_cb.pairing_state), handle, status, enc_mode,
                         (bda[2] << 24) + (bda[3] << 16) + (bda[4] << 8) + bda[5]);
    }
#endif

    if (!p_dev_rec) {
        /* There is no device record for new connection.  Allocate one */
        if (status == HCI_SUCCESS) {
            p_dev_rec = btm_sec_alloc_dev (bda);
        } else {
            /* If the device matches with stored paring address
             * reset the paring state to idle */
            if ((btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) &&
                    (memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN) == 0)) {
                btm_sec_change_pairing_state(BTM_PAIR_STATE_IDLE);
            }

            /* can not find the device record and the status is error,
             * just ignore it */
            return;
        }
    } else { /* Update the timestamp for this device */

#if BLE_INCLUDED == TRUE
        bit_shift = (handle == p_dev_rec->ble_hci_handle) ? 8 : 0;
#endif
        p_dev_rec->timestamp = btm_cb.dev_rec_count++;
        if (p_dev_rec->sm4 & BTM_SM4_CONN_PEND) {
            /* tell L2CAP it's a bonding connection. */
            if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
                    &&  (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0)
                    &&  (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) ) {
                /* if incoming connection failed while pairing, then try to connect and continue */
                /* Motorola S9 disconnects without asking pin code */
                if ((status != HCI_SUCCESS) && (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_PIN_REQ)) {
                    BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: incoming connection failed without asking PIN\n");

                    p_dev_rec->sm4 &= ~BTM_SM4_CONN_PEND;
                    if (p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) {
                        /* Start timer with 0 to initiate connection with new LCB */
                        /* because L2CAP will delete current LCB with this event  */
                        btm_cb.p_collided_dev_rec = p_dev_rec;
                        btm_cb.sec_collision_tle.param = (UINT32) btm_sec_connect_after_reject_timeout;
                        btu_start_timer (&btm_cb.sec_collision_tle, BTU_TTYPE_USER_FUNC, 0);
                    } else {
                        btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME);
                        BTM_ReadRemoteDeviceName(p_dev_rec->bd_addr, NULL, BT_TRANSPORT_BR_EDR);
                    }
#if BTM_DISC_DURING_RS == TRUE
                    p_dev_rec->rs_disc_pending   = BTM_SEC_RS_NOT_PENDING;     /* reset flag */
#endif
                    return;
                } else {
                    l2cu_update_lcb_4_bonding(p_dev_rec->bd_addr, TRUE);
                }
            }
            /* always clear the pending flag */
            p_dev_rec->sm4 &= ~BTM_SM4_CONN_PEND;
        }
    }

#if BLE_INCLUDED == TRUE
    p_dev_rec->device_type |= BT_DEVICE_TYPE_BREDR;
#endif

#if BTM_DISC_DURING_RS == TRUE
    p_dev_rec->rs_disc_pending   = BTM_SEC_RS_NOT_PENDING;     /* reset flag */
#endif

    p_dev_rec->rs_disc_pending   = BTM_SEC_RS_NOT_PENDING;     /* reset flag */

    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            && (memcmp (btm_cb.pairing_bda, bda, BD_ADDR_LEN) == 0) ) {
        /* if we rejected incoming connection from bonding device */
        if ((status == HCI_ERR_HOST_REJECT_DEVICE)
                && (btm_cb.pairing_flags & BTM_PAIR_FLAGS_REJECTED_CONNECT)) {
            BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: HCI_Conn_Comp Flags:0x%04x, sm4: 0x%x\n",
                               btm_cb.pairing_flags, p_dev_rec->sm4);

            btm_cb.pairing_flags &= ~BTM_PAIR_FLAGS_REJECTED_CONNECT;
            if (BTM_SEC_IS_SM4_UNKNOWN(p_dev_rec->sm4)) {
                /* Try again: RNR when no ACL causes HCI_RMT_HOST_SUP_FEAT_NOTIFY_EVT */
                btm_sec_change_pairing_state (BTM_PAIR_STATE_GET_REM_NAME);
                BTM_ReadRemoteDeviceName(bda, NULL, BT_TRANSPORT_BR_EDR);
                return;
            }

            /* if we already have pin code */
            if (btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_LOCAL_PIN) {
                /* Start timer with 0 to initiate connection with new LCB */
                /* because L2CAP will delete current LCB with this event  */
                btm_cb.p_collided_dev_rec = p_dev_rec;
                btm_cb.sec_collision_tle.param = (UINT32) btm_sec_connect_after_reject_timeout;
                btu_start_timer (&btm_cb.sec_collision_tle, BTU_TTYPE_USER_FUNC, 0);
            }

            return;
        }
        /* wait for incoming connection without resetting pairing state */
        else if (status == HCI_ERR_CONNECTION_EXISTS) {
            BTM_TRACE_WARNING ("Security Manager: btm_sec_connected: Wait for incoming connection\n");
            return;
        }

        is_pairing_device = TRUE;
    }

    /* If connection was made to do bonding restore link security if changed */
    btm_restore_mode();

    /* if connection fails during pin request, notify application */
    if (status != HCI_SUCCESS) {
        /* If connection failed because of during pairing, need to tell user */
        if (is_pairing_device) {
            p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
            p_dev_rec->sec_flags &= ~((BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED) << bit_shift);
            BTM_TRACE_DEBUG ("security_required:%x \n", p_dev_rec->security_required );

            btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);

            /* We need to notify host that the key is not known any more */
            if (btm_cb.api.p_auth_complete_callback) {
                sec_dev_rec_status = (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                                             p_dev_rec->dev_class,
                                                                             p_dev_rec->sec_bd_name, status);
                if (sec_dev_rec_status == BTM_SEC_DEV_REC_REMOVED) {
                    p_dev_rec = NULL;
                }
            }
        }
        /*
            Do not send authentication failure, if following conditions hold good
             1.  BTM Sec Pairing state is idle
             2.  Link key for the remote device is present.
             3.  Remote is SSP capable.
         */
        else if  ((p_dev_rec->link_key_type  <= BTM_LKEY_TYPE_REMOTE_UNIT) &&
                  (((status == HCI_ERR_AUTH_FAILURE)                      ||
                    (status == HCI_ERR_KEY_MISSING)                         ||
                    (status == HCI_ERR_HOST_REJECT_SECURITY)                ||
                    (status == HCI_ERR_PAIRING_NOT_ALLOWED)                 ||
                    (status == HCI_ERR_UNIT_KEY_USED)                       ||
                    (status == HCI_ERR_PAIRING_WITH_UNIT_KEY_NOT_SUPPORTED) ||
                    (status == HCI_ERR_ENCRY_MODE_NOT_ACCEPTABLE)           ||
                    (status == HCI_ERR_REPEATED_ATTEMPTS)))) {
            p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;
            p_dev_rec->sec_flags &= ~ (BTM_SEC_LE_LINK_KEY_KNOWN << bit_shift);


#ifdef BRCM_NOT_4_BTE
            /* If we rejected pairing, pass this special result code */
            if (btm_cb.acl_disc_reason == HCI_ERR_HOST_REJECT_SECURITY) {
                status = HCI_ERR_HOST_REJECT_SECURITY;
            }
#endif

            /* We need to notify host that the key is not known any more */
            if (btm_cb.api.p_auth_complete_callback) {
                sec_dev_rec_status = (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                                             p_dev_rec->dev_class,
                                                                             p_dev_rec->sec_bd_name, status);
                if (sec_dev_rec_status == BTM_SEC_DEV_REC_REMOVED) {
                    p_dev_rec = NULL;
                }
            }
        }

        if (status == HCI_ERR_CONNECTION_TOUT || status == HCI_ERR_LMP_RESPONSE_TIMEOUT  ||
                status == HCI_ERR_UNSPECIFIED     || status == HCI_ERR_PAGE_TIMEOUT) {
            btm_sec_dev_rec_cback_event (p_dev_rec, BTM_DEVICE_TIMEOUT, FALSE);
        } else {
            btm_sec_dev_rec_cback_event (p_dev_rec, BTM_ERR_PROCESSING, FALSE);
        }

        return;
    }

    /* If initiated dedicated bonding, return the link key now, and initiate disconnect */
    /* If dedicated bonding, and we now have a link key, we are all done */
    if ( is_pairing_device
            && (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) ) {
        if (p_dev_rec->link_key_not_sent) {
            p_dev_rec->link_key_not_sent = FALSE;
            btm_send_link_key_notif(p_dev_rec);
        }

        p_dev_rec->security_required &= ~BTM_SEC_OUT_AUTHENTICATE;

        /* remember flag before it is initialized */
        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) {
            res = TRUE;
        } else {
            res = FALSE;
        }

        if (btm_cb.api.p_auth_complete_callback) {
            sec_dev_rec_status = (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                                         p_dev_rec->dev_class,
                                                                         p_dev_rec->sec_bd_name, HCI_SUCCESS);
            if (sec_dev_rec_status == BTM_SEC_DEV_REC_REMOVED) {
                p_dev_rec = NULL;
            }
        }

        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);

        if ( res ) {
            /* Let l2cap start bond timer */
            l2cu_update_lcb_4_bonding (p_dev_rec->bd_addr, TRUE);
        }

        return;
    }

    p_dev_rec->hci_handle = handle;

    /* role may not be correct here, it will be updated by l2cap, but we need to */
    /* notify btm_acl that link is up, so starting of rmt name request will not */
    /* set paging flag up */
    p_acl_cb = btm_bda_to_acl(bda, BT_TRANSPORT_BR_EDR);
    if (p_acl_cb) {
        /* whatever is in btm_establish_continue() without reporting the BTM_BL_CONN_EVT event */
#if (!defined(BTM_BYPASS_EXTRA_ACL_SETUP) || BTM_BYPASS_EXTRA_ACL_SETUP == FALSE)
        /* For now there are a some devices that do not like sending */
        /* commands events and data at the same time. */
        /* Set the packet types to the default allowed by the device */
        btm_set_packet_types (p_acl_cb, btm_cb.btm_acl_pkt_types_supported);

        if (btm_cb.btm_def_link_policy) {
            BTM_SetLinkPolicy (p_acl_cb->remote_addr, &btm_cb.btm_def_link_policy);
        }
#endif
    }
    btm_acl_created (bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name, handle, HCI_ROLE_SLAVE, BT_TRANSPORT_BR_EDR);

    /* Initialize security flags.  We need to do that because some            */
    /* authorization complete could have come after the connection is dropped */
    /* and that would set wrong flag that link has been authorized already    */
    p_dev_rec->sec_flags &= ~((BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED |
                               BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED) << bit_shift);

    if (enc_mode != HCI_ENCRYPT_MODE_DISABLED) {
        p_dev_rec->sec_flags |= ((BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED) << bit_shift);
    }

    if (btm_cb.security_mode == BTM_SEC_MODE_LINK) {
        p_dev_rec->sec_flags |= (BTM_SEC_AUTHENTICATED << bit_shift);
    }

    if (p_dev_rec->pin_code_length >= 16 ||
            p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
            p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
        p_dev_rec->sec_flags |= (BTM_SEC_16_DIGIT_PIN_AUTHED << bit_shift);
    }

    p_dev_rec->link_key_changed = FALSE;

    /* After connection is established we perform security if we do not know */
    /* the name, or if we are originator because some procedure can have */
    /* been scheduled while connection was down */
    BTM_TRACE_DEBUG ("is_originator:%d \n", p_dev_rec->is_originator);
    if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) || p_dev_rec->is_originator) {
        if ((res = btm_sec_execute_procedure (p_dev_rec)) != BTM_CMD_STARTED) {
            btm_sec_dev_rec_cback_event (p_dev_rec, res, FALSE);
        }
    }
    return;
}

/*******************************************************************************
**
** Function         btm_sec_disconnect
**
** Description      This function is called to disconnect HCI link
**
** Returns          btm status
**
*******************************************************************************/
tBTM_STATUS btm_sec_disconnect (UINT16 handle, UINT8 reason)
{
    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev_by_handle (handle);

    /* In some weird race condition we may not have a record */
    if (!p_dev_rec) {
        btsnd_hcic_disconnect (handle, reason);
        return (BTM_SUCCESS);
    }

    /* If we are in the process of bonding we need to tell client that auth failed */
    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            &&  (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0)
            &&  (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) ) {
        /* we are currently doing bonding.  Link will be disconnected when done */
        btm_cb.pairing_flags |= BTM_PAIR_FLAGS_DISC_WHEN_DONE;
        return (BTM_BUSY);
    }

    return (btm_sec_send_hci_disconnect(p_dev_rec, reason, handle));
}

/*******************************************************************************
**
** Function         btm_sec_disconnected
**
** Description      This function is when a connection to the peer device is
**                  dropped
**
** Returns          void
**
*******************************************************************************/
void btm_sec_disconnected (UINT16 handle, UINT8 reason)
{
    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev_by_handle (handle);
    UINT8             old_pairing_flags = btm_cb.pairing_flags;
    int               result = HCI_ERR_AUTH_FAILURE;
    tBTM_SEC_CALLBACK   *p_callback = NULL;
    tBT_TRANSPORT      transport = BT_TRANSPORT_BR_EDR;

    /* If page was delayed for disc complete, can do it now */
    btm_cb.discing = FALSE;

#if (CLASSIC_BT_INCLUDED == TRUE)
    btm_acl_resubmit_page();
#endif

    if (!p_dev_rec) {
        return;
    }
    p_dev_rec->enc_init_by_we = FALSE;
    transport  = (handle == p_dev_rec->hci_handle) ? BT_TRANSPORT_BR_EDR : BT_TRANSPORT_LE;

    p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING;     /* reset flag */

#if BTM_DISC_DURING_RS == TRUE
    p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING;     /* reset flag */
#endif

    /* clear unused flags */
    p_dev_rec->sm4 &= BTM_SM4_TRUE;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    uint8_t *bd_addr = (uint8_t *)p_dev_rec->bd_addr;
    BTM_TRACE_EVENT("%s sec_req:x%x state:%s reason:%d bd_addr:%02x:%02x:%02x:%02x:%02x:%02x"
                    "  remote_name:%s\n", __func__, p_dev_rec->security_required, btm_pair_state_descr(btm_cb.pairing_state),
                    reason, bd_addr[0], bd_addr[1], bd_addr[2], bd_addr[3], bd_addr[4], bd_addr[5], p_dev_rec->sec_bd_name);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    BTM_TRACE_EVENT("%s before update sec_flags=0x%x\n", __func__, p_dev_rec->sec_flags);

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    btm_ble_update_mode_operation(HCI_ROLE_UNKNOWN, p_dev_rec->bd_addr, HCI_SUCCESS);
    /* see sec_flags processing in btm_acl_removed */

    if (transport == BT_TRANSPORT_LE) {
        p_dev_rec->ble_hci_handle = BTM_SEC_INVALID_HANDLE;
        p_dev_rec->sec_flags &= ~(BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED);
        p_dev_rec->enc_key_size = 0;
    } else
#endif
    {
        p_dev_rec->hci_handle = BTM_SEC_INVALID_HANDLE;
        p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED | BTM_SEC_ENCRYPTED
                                  | BTM_SEC_ROLE_SWITCHED | BTM_SEC_16_DIGIT_PIN_AUTHED);
    }

#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
    if (p_dev_rec->sec_state == BTM_SEC_STATE_DISCONNECTING_BOTH) {
        p_dev_rec->sec_state = (transport == BT_TRANSPORT_LE) ?
                               BTM_SEC_STATE_DISCONNECTING : BTM_SEC_STATE_DISCONNECTING_BLE;
        return;
    }
#endif
    p_dev_rec->sec_state  = BTM_SEC_STATE_IDLE;
    p_dev_rec->security_required = BTM_SEC_NONE;

    p_callback = p_dev_rec->p_callback;

    /* if security is pending, send callback to clean up the security state */
    if (p_callback) {
        p_dev_rec->p_callback = NULL; /* when the peer device time out the authentication before
                                         we do, this call back must be reset here */
        (*p_callback) (p_dev_rec->bd_addr, transport, p_dev_rec->p_ref_data, BTM_ERR_PROCESSING);
    }

    BTM_TRACE_EVENT("%s after update sec_flags=0x%x\n", __func__, p_dev_rec->sec_flags);

    /* If we are in the process of bonding we need to tell client that auth failed */
    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            && (memcmp (btm_cb.pairing_bda, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0)) {
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        p_dev_rec->sec_flags &= ~BTM_SEC_LINK_KEY_KNOWN;
        if (btm_cb.api.p_auth_complete_callback) {
            /* If the disconnection reason is REPEATED_ATTEMPTS,
               send this error message to complete callback function
               to display the error message of Repeated attempts.
               All others, send HCI_ERR_AUTH_FAILURE. */
            if (reason == HCI_ERR_REPEATED_ATTEMPTS) {
                result = HCI_ERR_REPEATED_ATTEMPTS;
            } else if (old_pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) {
                result = HCI_ERR_HOST_REJECT_SECURITY;
            }
            (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,     p_dev_rec->dev_class,
                                                    p_dev_rec->sec_bd_name, result);
        }
    }
}

/*******************************************************************************
**
** Function         btm_sec_link_key_notification
**
** Description      This function is called when a new connection link key is
**                  generated
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
void btm_sec_link_key_notification (UINT8 *p_bda, UINT8 *p_link_key, UINT8 key_type)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_bda);
    BOOLEAN         we_are_bonding = FALSE;
    BOOLEAN         ltk_derived_lk  = FALSE;
    UINT8           res;

    BTM_TRACE_EVENT ("btm_sec_link_key_notification()  BDA:%04x%08x, TYPE: %d\n",
                     (p_bda[0] << 8) + p_bda[1], (p_bda[2] << 24) + (p_bda[3] << 16) + (p_bda[4] << 8) + p_bda[5],
                     key_type);

    if ((key_type >= BTM_LTK_DERIVED_LKEY_OFFSET + BTM_LKEY_TYPE_COMBINATION) &&
            (key_type <= BTM_LTK_DERIVED_LKEY_OFFSET + BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
        ltk_derived_lk = TRUE;
        key_type -= BTM_LTK_DERIVED_LKEY_OFFSET;
    }
    /* If connection was made to do bonding restore link security if changed */
    btm_restore_mode();

    /* Store the previous state of secure connection as current state. Since
     * this is the first encounter with the remote device, whatever the remote
     * device's SC state is, it cannot lower the SC level from this. */
    p_dev_rec->remote_secure_connection_previous_state = p_dev_rec->remote_supports_secure_connections;
    if (p_dev_rec->remote_supports_secure_connections) {
        BTM_TRACE_EVENT ("Remote device supports Secure Connection");
    } else {
        BTM_TRACE_EVENT ("Remote device does not support Secure Connection");
    }
    if (key_type != BTM_LKEY_TYPE_CHANGED_COMB) {
        p_dev_rec->link_key_type = key_type;
    }

    p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN;

#if (CLASSIC_BT_INCLUDED == TRUE)
    btm_sec_update_legacy_auth_state(btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR), BTM_ACL_LEGACY_AUTH_NONE);
#endif
    /*
     * Until this point in time, we do not know if MITM was enabled, hence we
     * add the extended security flag here.
     */
    if (p_dev_rec->pin_code_length >= 16 ||
            p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB ||
            p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
        p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
    }

#if (BLE_INCLUDED == TRUE)
    /* BR/EDR connection, update the encryption key size to be 16 as always */
    p_dev_rec->enc_key_size = 16;
#endif
    memcpy (p_dev_rec->link_key, p_link_key, LINK_KEY_LEN);

    if ( (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE)
            && (memcmp (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN) == 0) ) {
        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) {
            we_are_bonding = TRUE;
        } else {
            btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        }
    }

    /* save LTK derived LK no matter what */
    if (ltk_derived_lk) {
        if (btm_cb.api.p_link_key_callback) {
            BTM_TRACE_DEBUG ("%s() Save LTK derived LK (key_type = %d)\n",
                             __FUNCTION__, p_dev_rec->link_key_type);
            (*btm_cb.api.p_link_key_callback) (p_bda, p_dev_rec->dev_class,
                                               p_dev_rec->sec_bd_name,
                                               p_link_key, p_dev_rec->link_key_type,
                                               p_dev_rec->remote_supports_secure_connections);
        }
    } else {
        if ((p_dev_rec->link_key_type == BTM_LKEY_TYPE_UNAUTH_COMB_P_256) ||
                (p_dev_rec->link_key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
            p_dev_rec->new_encryption_key_is_p256 = TRUE;
            BTM_TRACE_DEBUG ("%s set new_encr_key_256 to %d\n",
                             __func__, p_dev_rec->new_encryption_key_is_p256);
        }
    }

    /* If name is not known at this point delay calling callback until the name is   */
    /* resolved. Unless it is a HID Device and we really need to send all link keys. */
    if ((!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
            &&  ((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) != BTM_COD_MAJOR_PERIPHERAL))
            && !ltk_derived_lk) {
        BTM_TRACE_EVENT ("btm_sec_link_key_notification()  Delayed BDA: %08x%04x Type:%d\n",
                         (p_bda[0] << 24) + (p_bda[1] << 16) + (p_bda[2] << 8) + p_bda[3],
                         (p_bda[4] << 8) + p_bda[5], key_type);

        p_dev_rec->link_key_not_sent = TRUE;

        /* If it is for bonding nothing else will follow, so we need to start name resolution */
        if (we_are_bonding) {
            if (!(btsnd_hcic_rmt_name_req (p_bda, HCI_PAGE_SCAN_REP_MODE_R1, HCI_MANDATARY_PAGE_SCAN_MODE, 0))) {
                btm_inq_rmt_name_failed();
            }
        }

        BTM_TRACE_EVENT ("rmt_io_caps:%d, sec_flags:x%x, dev_class[1]:x%02x\n", p_dev_rec->rmt_io_caps, p_dev_rec->sec_flags, p_dev_rec->dev_class[1])
        return;
    }

    /* If its not us who perform authentication, we should tell stackserver */
    /* that some authentication has been completed                          */
    /* This is required when different entities receive link notification and auth complete */
    if (!(p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE)
            /* for derived key, always send authentication callback for BR channel */
            || ltk_derived_lk) {
        if (btm_cb.api.p_auth_complete_callback) {
            res = (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
                                                          p_dev_rec->sec_bd_name, HCI_SUCCESS);
            if (res == BTM_SEC_DEV_REC_REMOVED) {
                p_dev_rec = NULL;
            }
        }
    }

    if(!p_dev_rec) {
        return;
    }

    /* We will save link key only if the user authorized it - BTE report link key in all cases */
#ifdef BRCM_NONE_BTE
    if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_AUTHED)
#endif
    {
        if (btm_cb.api.p_link_key_callback) {
            if (ltk_derived_lk) {
                BTM_TRACE_DEBUG ("btm_sec_link_key_notification()  LTK derived LK is saved already"
                                 " (key_type = %d)\n", p_dev_rec->link_key_type);
            } else {
                (*btm_cb.api.p_link_key_callback) (p_bda, p_dev_rec->dev_class,
                                                   p_dev_rec->sec_bd_name,
                                                   p_link_key, p_dev_rec->link_key_type,
                                                   p_dev_rec->remote_supports_secure_connections);
            }
        }
    }
}

/*******************************************************************************
**
** Function         btm_sec_link_key_request
**
** Description      This function is called when controller requests link key
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
void btm_sec_link_key_request (UINT8 *p_bda)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_bda);

    BTM_TRACE_EVENT ("btm_sec_link_key_request()  BDA: %02x:%02x:%02x:%02x:%02x:%02x\n",
                     p_bda[0], p_bda[1], p_bda[2], p_bda[3], p_bda[4], p_bda[5]);

    if ( (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_PIN_REQ) &&
            (btm_cb.collision_start_time != 0) &&
            (memcmp (btm_cb.p_collided_dev_rec->bd_addr, p_bda, BD_ADDR_LEN) == 0) ) {
        BTM_TRACE_EVENT ("btm_sec_link_key_request() rejecting link key req "
                         "State: %d START_TIMEOUT : %d\n",
                         btm_cb.pairing_state, btm_cb.collision_start_time);
        btsnd_hcic_link_key_neg_reply (p_bda);
        return;
    }
    if (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN) {
        btsnd_hcic_link_key_req_reply (p_bda, p_dev_rec->link_key);
        return;
    }

    /* Notify L2CAP to increase timeout */
    l2c_pin_code_request (p_bda);

    /* The link key is not in the database and it is not known to the manager */
    btsnd_hcic_link_key_neg_reply (p_bda);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_pairing_timeout
**
** Description      This function is called when host does not provide PIN
**                  within requested time
**
** Returns          Pointer to the TLE struct
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_pairing_timeout (TIMER_LIST_ENT *p_tle)
{
    tBTM_CB *p_cb = &btm_cb;
    tBTM_SEC_DEV_REC *p_dev_rec;
#if BTM_OOB_INCLUDED == TRUE
#if (BTM_LOCAL_IO_CAPS == BTM_IO_CAP_NONE)
    tBTM_AUTH_REQ   auth_req = BTM_AUTH_AP_NO;
#else
    tBTM_AUTH_REQ   auth_req = BTM_AUTH_AP_YES;
#endif
#endif
    UINT8   name[2];
    UNUSED(p_tle);

    p_cb->pairing_tle.param = 0;
    /* Coverity: FALSE-POSITIVE error from Coverity tool. Please do NOT remove following comment. */
    /* coverity[UNUSED_VALUE] pointer p_dev_rec is actually used several times... This is a Coverity false-positive, i.e. a fake issue.
    */
    p_dev_rec = btm_find_dev (p_cb->pairing_bda);
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("btm_sec_pairing_timeout()  State: %s   Flags: %u\n",
                     btm_pair_state_descr(p_cb->pairing_state), p_cb->pairing_flags);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    switch (p_cb->pairing_state) {
    case BTM_PAIR_STATE_WAIT_PIN_REQ:
        btm_sec_bond_cancel_complete();
        break;

    case BTM_PAIR_STATE_WAIT_LOCAL_PIN:
        if ( (btm_cb.pairing_flags & BTM_PAIR_FLAGS_PRE_FETCH_PIN) == 0) {
            btsnd_hcic_pin_code_neg_reply (p_cb->pairing_bda);
        }
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        /* We need to notify the UI that no longer need the PIN */
        if (btm_cb.api.p_auth_complete_callback) {
            if (p_dev_rec == NULL) {
                name[0] = '\0';
                (*btm_cb.api.p_auth_complete_callback) (p_cb->pairing_bda,
                                                        NULL,
                                                        name, HCI_ERR_CONNECTION_TOUT);
            } else {
                (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                        p_dev_rec->dev_class,
                                                        p_dev_rec->sec_bd_name, HCI_ERR_CONNECTION_TOUT);
            }
        }
        break;

    case BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM:
        btsnd_hcic_user_conf_reply (p_cb->pairing_bda, FALSE);
        /* btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); */
        break;

#if (BT_SSP_INCLUDED == TRUE)
    case BTM_PAIR_STATE_KEY_ENTRY:
        btsnd_hcic_user_passkey_neg_reply(p_cb->pairing_bda);
        /* btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE); */
        break;
#endif /* !BTM_IO_CAP_NONE */

#if BTM_OOB_INCLUDED == TRUE
    case BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS:
        if (btm_cb.pairing_flags & BTM_PAIR_FLAGS_WE_STARTED_DD) {
            auth_req |= BTM_AUTH_DD_BOND;
        }

        btsnd_hcic_io_cap_req_reply (p_cb->pairing_bda, btm_cb.devcb.loc_io_caps,
                                     BTM_OOB_NONE, auth_req);
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        break;

    case BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP:
        btsnd_hcic_rem_oob_neg_reply (p_cb->pairing_bda);
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        break;
#endif /* BTM_OOB_INCLUDED */

    case BTM_PAIR_STATE_WAIT_DISCONNECT:
        /* simple pairing failed. Started a 1-sec timer at simple pairing complete.
         * now it's time to tear down the ACL link*/
        if (p_dev_rec == NULL) {
            BTM_TRACE_ERROR ("btm_sec_pairing_timeout() BTM_PAIR_STATE_WAIT_DISCONNECT unknown BDA: %08x%04x\n",
                             (p_cb->pairing_bda[0] << 24) + (p_cb->pairing_bda[1] << 16) + (p_cb->pairing_bda[2] << 8) + p_cb->pairing_bda[3],
                             (p_cb->pairing_bda[4] << 8) + p_cb->pairing_bda[5]);
            break;
        }
        btm_sec_send_hci_disconnect (p_dev_rec, HCI_ERR_AUTH_FAILURE, p_dev_rec->hci_handle);
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        break;

    case BTM_PAIR_STATE_WAIT_AUTH_COMPLETE:
    case BTM_PAIR_STATE_GET_REM_NAME:
        /* We need to notify the UI that timeout has happened while waiting for authentication*/
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        if (btm_cb.api.p_auth_complete_callback) {
            if (p_dev_rec == NULL) {
                name[0] = '\0';
                (*btm_cb.api.p_auth_complete_callback) (p_cb->pairing_bda,
                                                        NULL,
                                                        name, HCI_ERR_CONNECTION_TOUT);
            } else {
                (*btm_cb.api.p_auth_complete_callback) (p_dev_rec->bd_addr,
                                                        p_dev_rec->dev_class,
                                                        p_dev_rec->sec_bd_name, HCI_ERR_CONNECTION_TOUT);
            }
        }
        break;

    default:
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
        BTM_TRACE_WARNING ("btm_sec_pairing_timeout() not processed state: %s\n", btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
        btm_sec_change_pairing_state (BTM_PAIR_STATE_IDLE);
        break;
    }
}

#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function         btm_sec_pin_code_request
**
** Description      This function is called when controller requests PIN code
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
void btm_sec_pin_code_request (UINT8 *p_bda)
{
    tBTM_SEC_DEV_REC *p_dev_rec;
    tBTM_CB          *p_cb = &btm_cb;

#ifdef PORCHE_PAIRING_CONFLICT
    UINT8 default_pin_code_len = 4;
    PIN_CODE default_pin_code = {0x30, 0x30, 0x30, 0x30};
#endif
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("btm_sec_pin_code_request()  State: %s, BDA:%04x%08x\n",
                     btm_pair_state_descr(btm_cb.pairing_state),
                     (p_bda[0] << 8) + p_bda[1], (p_bda[2] << 24) + (p_bda[3] << 16) + (p_bda[4] << 8) + p_bda[5] );
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
    if (btm_cb.pairing_state != BTM_PAIR_STATE_IDLE) {
        if ( (memcmp (p_bda, btm_cb.pairing_bda, BD_ADDR_LEN) == 0)  &&
                (btm_cb.pairing_state == BTM_PAIR_STATE_WAIT_AUTH_COMPLETE) ) {
            /* fake this out - porshe carkit issue - */
//            btm_cb.pairing_state = BTM_PAIR_STATE_IDLE;
            if (! btm_cb.pin_code_len_saved) {
                btsnd_hcic_pin_code_neg_reply (p_bda);
                return;
            } else {
                btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len_saved, p_cb->pin_code);
                return;
            }
        } else if ((btm_cb.pairing_state != BTM_PAIR_STATE_WAIT_PIN_REQ)
                   || memcmp (p_bda, btm_cb.pairing_bda, BD_ADDR_LEN) != 0) {
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
            BTM_TRACE_WARNING ("btm_sec_pin_code_request() rejected - state: %s\n",
                               btm_pair_state_descr(btm_cb.pairing_state));
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE
#ifdef PORCHE_PAIRING_CONFLICT
            /* reply pin code again due to counter in_rand when local initiates pairing */
            BTM_TRACE_EVENT ("btm_sec_pin_code_request from remote dev. for local initiated pairing\n");
            if (! btm_cb.pin_code_len_saved) {
                btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
                btsnd_hcic_pin_code_req_reply (p_bda, default_pin_code_len, default_pin_code);
            } else {
                btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
                btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len_saved, p_cb->pin_code);
            }
#else
            btsnd_hcic_pin_code_neg_reply (p_bda);
#endif
            return;
        }
    }

    p_dev_rec = btm_find_or_alloc_dev (p_bda);
    /* received PIN code request. must be non-sm4 */
    p_dev_rec->sm4 = BTM_SM4_KNOWN;

    if (btm_cb.pairing_state == BTM_PAIR_STATE_IDLE) {
        memcpy (btm_cb.pairing_bda, p_bda, BD_ADDR_LEN);

        btm_cb.pairing_flags = BTM_PAIR_FLAGS_PEER_STARTED_DD;
        /* Make sure we reset the trusted mask to help against attacks */
        BTM_SEC_CLR_TRUSTED_DEVICE(p_dev_rec->trusted_mask);
    }

    if (!p_cb->pairing_disabled && (p_cb->cfg.pin_type == HCI_PIN_TYPE_FIXED)) {
        BTM_TRACE_EVENT ("btm_sec_pin_code_request fixed pin replying\n");
        btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
        btsnd_hcic_pin_code_req_reply (p_bda, p_cb->cfg.pin_code_len, p_cb->cfg.pin_code);
        return;
    }

    /* Use the connecting device's CoD for the connection */
    if ( (!memcmp (p_bda, p_cb->connecting_bda, BD_ADDR_LEN))
            &&  (p_cb->connecting_dc[0] || p_cb->connecting_dc[1] || p_cb->connecting_dc[2]) ) {
        memcpy (p_dev_rec->dev_class, p_cb->connecting_dc, DEV_CLASS_LEN);
    }

    /* We could have started connection after asking user for the PIN code */
    if (btm_cb.pin_code_len != 0) {
        BTM_TRACE_EVENT ("btm_sec_pin_code_request bonding sending reply\n");
        btsnd_hcic_pin_code_req_reply (p_bda, btm_cb.pin_code_len, p_cb->pin_code);

#ifdef PORCHE_PAIRING_CONFLICT
        btm_cb.pin_code_len_saved = btm_cb.pin_code_len;
#endif

        /* Mark that we forwarded received from the user PIN code */
        btm_cb.pin_code_len = 0;

        /* We can change mode back right away, that other connection being established */
        /* is not forced to be secure - found a FW issue, so we can not do this
        btm_restore_mode(); */

        btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_AUTH_COMPLETE);
    }

    /* If pairing disabled OR (no PIN callback and not bonding) */
    /* OR we could not allocate entry in the database reject pairing request */
    else if (p_cb->pairing_disabled
             || (p_cb->api.p_pin_callback == NULL)

             /* OR Microsoft keyboard can for some reason try to establish connection */
             /*  the only thing we can do here is to shut it up.  Normally we will be originator */
             /*  for keyboard bonding */
             || (!p_dev_rec->is_originator
                 && ((p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK) == BTM_COD_MAJOR_PERIPHERAL)
                 &&  (p_dev_rec->dev_class[2] & BTM_COD_MINOR_KEYBOARD)) ) {
        BTM_TRACE_WARNING("btm_sec_pin_code_request(): Pairing disabled:%d; PIN callback:%p, Dev Rec:%p!\n",
                          p_cb->pairing_disabled, p_cb->api.p_pin_callback, p_dev_rec);

        btsnd_hcic_pin_code_neg_reply (p_bda);
    }
    /* Notify upper layer of PIN request and start expiration timer */
    else {
        btm_cb.pin_code_len_saved = 0;
        btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN);
        /* Pin code request can not come at the same time as connection request */
        memcpy (p_cb->connecting_bda, p_bda, BD_ADDR_LEN);
        memcpy (p_cb->connecting_dc,  p_dev_rec->dev_class, DEV_CLASS_LEN);

        BTM_TRACE_EVENT ("btm_sec_pin_code_request going for callback\n");
        btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD;
        if (p_cb->api.p_pin_callback) {
            (*p_cb->api.p_pin_callback) (p_bda, p_dev_rec->dev_class, p_dev_rec->sec_bd_name,
                                         (p_dev_rec->p_cur_service == NULL) ? FALSE
                                         : (p_dev_rec->p_cur_service->security_flags
                                            & BTM_SEC_IN_MIN_16_DIGIT_PIN));
        }
    }
    return;
}
#endif  ///CLASSIC_BT_INCLUDED == TRUE
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_sec_update_clock_offset
**
** Description      This function is called to update clock offset
**
** Returns          void
**
*******************************************************************************/
void btm_sec_update_clock_offset (UINT16 handle, UINT16 clock_offset)
{
    tBTM_SEC_DEV_REC  *p_dev_rec;
    tBTM_INQ_INFO     *p_inq_info;

    if ((p_dev_rec = btm_find_dev_by_handle (handle)) == NULL) {
        return;
    }

    p_dev_rec->clock_offset = clock_offset | BTM_CLOCK_OFFSET_VALID;

    if ((p_inq_info = BTM_InqDbRead(p_dev_rec->bd_addr)) == NULL) {
        return;
    }

    p_inq_info->results.clock_offset = clock_offset | BTM_CLOCK_OFFSET_VALID;
}


/******************************************************************
** S T A T I C     F U N C T I O N S
*******************************************************************/

/*******************************************************************************
**
** Function         btm_sec_execute_procedure
**
** Description      This function is called to start required security
**                  procedure.  There is a case when multiplexing protocol
**                  calls this function on the originating side, connection to
**                  the peer will not be established.  This function in this
**                  case performs only authorization.
**
** Returns          BTM_SUCCESS     - permission is granted
**                  BTM_CMD_STARTED - in process
**                  BTM_NO_RESOURCES  - permission declined
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static tBTM_STATUS btm_sec_execute_procedure (tBTM_SEC_DEV_REC *p_dev_rec)
{
    BTM_TRACE_EVENT ("btm_sec_execute_procedure: Required:0x%x Flags:0x%x State:%d\n",
                     p_dev_rec->security_required, p_dev_rec->sec_flags, p_dev_rec->sec_state);

    /* There is a chance that we are getting name.  Wait until done. */
    if (p_dev_rec->sec_state != 0) {
        return (BTM_CMD_STARTED);
    }

    /* If any security is required, get the name first */
    if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
            && (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)) {
        BTM_TRACE_EVENT ("Security Manager: Start get name\n");
        if (!btm_sec_start_get_name (p_dev_rec)) {
            return (BTM_NO_RESOURCES);
        }
        return (BTM_CMD_STARTED);
    }

#if (CLASSIC_BT_INCLUDED == TRUE)
    tACL_CONN *p_acl_cb = btm_handle_to_acl(p_dev_rec->hci_handle);
    /*
     * To prevent a remote device from doing a Bluetooth Impersonation Attack, a suggested fix by SIG is:
     *
     * "Hosts performing legacy (non-mutual) authentication must ensure a remote device is authenticated
     *  prior to proceeding with encryption establishment, regardless of role."
     *
     * As an implementation, we enforce mutual authentication when devices use Legacy Authentication.
     */
    if ((p_acl_cb != NULL) && (BTM_BothEndsSupportSecureConnections(p_acl_cb->remote_addr) == 0) &&
        ((p_acl_cb->legacy_auth_state & BTM_ACL_LEGACY_AUTH_SELF) == 0)) {
        p_dev_rec->sec_flags &= ~BTM_SEC_AUTHENTICATED;
    }
#endif

    /* If connection is not authenticated and authentication is required */
    /* start authentication and return PENDING to the caller */
    if ((((!(p_dev_rec->sec_flags & BTM_SEC_AUTHENTICATED))
            && (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_AUTHENTICATE))
                || (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_AUTHENTICATE))))
            || (!(p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED)
                && (!p_dev_rec->is_originator
                    && (p_dev_rec->security_required & BTM_SEC_IN_MIN_16_DIGIT_PIN))))
            && (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)) {
        /*
         * We rely on BTM_SEC_16_DIGIT_PIN_AUTHED being set if MITM is in use,
         * as 16 DIGIT is only needed if MITM is not used. Unfortunately, the
         * BTM_SEC_AUTHENTICATED is used for both MITM and non-MITM
         * authenticated connections, hence we cannot distinguish here.
         */

#if (L2CAP_UCD_INCLUDED == TRUE)
        /* if incoming UCD packet, discard it */
        if ( !p_dev_rec->is_originator && (p_dev_rec->is_ucd == TRUE )) {
            return (BTM_FAILED_ON_SECURITY);
        }
#endif

        BTM_TRACE_EVENT ("Security Manager: Start authentication\n");

        /*
         * If we do have a link-key, but we end up here because we need an
         * upgrade, then clear the link-key known and authenticated flag before
         * restarting authentication.
         * WARNING: If the controller has link-key, it is optional and
         * recommended for the controller to send a Link_Key_Request.
         * In case we need an upgrade, the only alternative would be to delete
         * the existing link-key. That could lead to very bad user experience
         * or even IOP issues, if a reconnect causes a new connection that
         * requires an upgrade.
         */
        if ((p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)
                && (!(p_dev_rec->sec_flags & BTM_SEC_16_DIGIT_PIN_AUTHED)
                    && (!p_dev_rec->is_originator && (p_dev_rec->security_required
                            & BTM_SEC_IN_MIN_16_DIGIT_PIN)))) {
            p_dev_rec->sec_flags &= ~(BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED
                                      | BTM_SEC_AUTHENTICATED);
        }

        if (!btm_sec_start_authentication (p_dev_rec)) {
            return (BTM_NO_RESOURCES);
        }
        return (BTM_CMD_STARTED);
    }

    /* If connection is not encrypted and encryption is required */
    /* start encryption and return PENDING to the caller */
    if (!(p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED)
            && (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_ENCRYPT))
                || (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_ENCRYPT)))
            && (p_dev_rec->hci_handle != BTM_SEC_INVALID_HANDLE)) {
#if (L2CAP_UCD_INCLUDED == TRUE)
        /* if incoming UCD packet, discard it */
        if ( !p_dev_rec->is_originator && (p_dev_rec->is_ucd == TRUE )) {
            return (BTM_FAILED_ON_SECURITY);
        }
#endif

        BTM_TRACE_EVENT ("Security Manager: Start encryption\n");

        if (!btm_sec_start_encryption (p_dev_rec)) {
            return (BTM_NO_RESOURCES);
        }
        return (BTM_CMD_STARTED);
    }

    if ((p_dev_rec->security_required & BTM_SEC_MODE4_LEVEL4) &&
            (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
        BTM_TRACE_EVENT("%s: Security Manager: SC only service, but link key type is 0x%02x -"
                        "security failure\n", __FUNCTION__, p_dev_rec->link_key_type);
        return (BTM_FAILED_ON_SECURITY);
    }

    /* If connection is not authorized and authorization is required */
    /* start authorization and return PENDING to the caller */
    if (!(p_dev_rec->sec_flags & BTM_SEC_AUTHORIZED)
            && (( p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_OUT_AUTHORIZE))
                || (!p_dev_rec->is_originator && (p_dev_rec->security_required & BTM_SEC_IN_AUTHORIZE)))) {
        BTM_TRACE_EVENT ("service id:%d, is trusted:%d\n",
                         p_dev_rec->p_cur_service->service_id,
                         (BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask,
                                 p_dev_rec->p_cur_service->service_id)));
        if ((btm_sec_are_all_trusted(p_dev_rec->trusted_mask) == FALSE) &&
                (p_dev_rec->p_cur_service->service_id < BTM_SEC_MAX_SERVICES) &&
                (BTM_SEC_IS_SERVICE_TRUSTED(p_dev_rec->trusted_mask,
                                            p_dev_rec->p_cur_service->service_id) == FALSE)) {
            BTM_TRACE_EVENT ("Security Manager: Start authorization\n");
            return (btm_sec_start_authorization (p_dev_rec));
        }
    }

    /* All required  security procedures already established */
    p_dev_rec->security_required &= ~(BTM_SEC_OUT_AUTHORIZE | BTM_SEC_IN_AUTHORIZE |
                                      BTM_SEC_OUT_AUTHENTICATE | BTM_SEC_IN_AUTHENTICATE |
                                      BTM_SEC_OUT_ENCRYPT | BTM_SEC_IN_ENCRYPT |
                                      BTM_SEC_FORCE_MASTER | BTM_SEC_ATTEMPT_MASTER |
                                      BTM_SEC_FORCE_SLAVE | BTM_SEC_ATTEMPT_SLAVE);

    BTM_TRACE_EVENT ("Security Manager: trusted:0x%04x%04x\n", p_dev_rec->trusted_mask[1], p_dev_rec->trusted_mask[0]);
    BTM_TRACE_EVENT ("Security Manager: access granted\n");

    return (BTM_SUCCESS);
}

/*******************************************************************************
**
** Function         btm_sec_start_get_name
**
** Description      This function is called to start get name procedure
**
** Returns          TRUE if started
**
*******************************************************************************/
static BOOLEAN btm_sec_start_get_name (tBTM_SEC_DEV_REC *p_dev_rec)
{
    UINT8 tempstate = p_dev_rec->sec_state;

    p_dev_rec->sec_state = BTM_SEC_STATE_GETTING_NAME;

    /* Device should be connected, no need to provide correct page params */
    /* 0 and NULL are as timeout and callback params because they are not used in security get name case */
    if ((btm_initiate_rem_name (p_dev_rec->bd_addr, NULL, BTM_RMT_NAME_SEC,
                                0, NULL)) != BTM_CMD_STARTED) {
        p_dev_rec->sec_state = tempstate;
        return (FALSE);
    }

    return (TRUE);
}

/*******************************************************************************
**
** Function         btm_sec_start_authentication
**
** Description      This function is called to start authentication
**
** Returns          TRUE if started
**
*******************************************************************************/
static BOOLEAN btm_sec_start_authentication (tBTM_SEC_DEV_REC *p_dev_rec)
{
    p_dev_rec->sec_state = BTM_SEC_STATE_AUTHENTICATING;

    return (btsnd_hcic_auth_request (p_dev_rec->hci_handle));
}

/*******************************************************************************
**
** Function         btm_sec_start_encryption
**
** Description      This function is called to start encryption
**
** Returns          TRUE if started
**
*******************************************************************************/
static BOOLEAN btm_sec_start_encryption (tBTM_SEC_DEV_REC *p_dev_rec)
{
    if (!btsnd_hcic_set_conn_encrypt (p_dev_rec->hci_handle, TRUE)) {
        return (FALSE);
    }

    p_dev_rec->sec_state = BTM_SEC_STATE_ENCRYPTING;
    return (TRUE);
}


/*******************************************************************************
**
** Function         btm_sec_start_authorization
**
** Description      This function is called to start authorization
**
** Returns          TRUE if started
**
*******************************************************************************/
static UINT8 btm_sec_start_authorization (tBTM_SEC_DEV_REC *p_dev_rec)
{
    UINT8    result;
    UINT8   *p_service_name = NULL;
    UINT8    service_id;

    if ((p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN)
            || (p_dev_rec->hci_handle == BTM_SEC_INVALID_HANDLE)) {
        if (!btm_cb.api.p_authorize_callback) {
            return (BTM_MODE_UNSUPPORTED);
        }

        if (p_dev_rec->p_cur_service) {
#if BTM_SEC_SERVICE_NAME_LEN > 0
            if (p_dev_rec->is_originator) {
                p_service_name = p_dev_rec->p_cur_service->orig_service_name;
            } else {
                p_service_name = p_dev_rec->p_cur_service->term_service_name;
            }
#endif
            service_id = p_dev_rec->p_cur_service->service_id;
        } else {
            service_id = 0;
        }

        /* Send authorization request if not already sent during this service connection */
        if (p_dev_rec->last_author_service_id == BTM_SEC_NO_LAST_SERVICE_ID
                || p_dev_rec->last_author_service_id != service_id) {
            p_dev_rec->sec_state = BTM_SEC_STATE_AUTHORIZING;
            result = (*btm_cb.api.p_authorize_callback) (p_dev_rec->bd_addr,
                     p_dev_rec->dev_class,
                     p_dev_rec->sec_bd_name,
                     p_service_name,
                     service_id,
                     p_dev_rec->is_originator);
        }

        else {  /* Already authorized once for this L2CAP bringup */
            BTM_TRACE_DEBUG ("btm_sec_start_authorization: (Ignoring extra Authorization prompt for service %d)\n", service_id);
            return (BTM_SUCCESS);
        }

        if (result == BTM_SUCCESS) {
            p_dev_rec->sec_flags |= BTM_SEC_AUTHORIZED;

            /* Save the currently authorized service in case we are asked again by another multiplexer layer */
            if (!p_dev_rec->is_originator) {
                p_dev_rec->last_author_service_id = service_id;
            }

            p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
        }
        return (result);
    }
    btm_sec_start_get_name (p_dev_rec);
    return (BTM_CMD_STARTED);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_are_all_trusted
**
** Description      This function is called check if all services are trusted
**
** Returns          TRUE if all are trusted, otherwise FALSE
**
*******************************************************************************/
BOOLEAN btm_sec_are_all_trusted(UINT32 p_mask[])
{
    UINT32 trusted_inx;
    for (trusted_inx = 0; trusted_inx < BTM_SEC_SERVICE_ARRAY_SIZE; trusted_inx++) {
        if (p_mask[trusted_inx] != BTM_SEC_TRUST_ALL) {
            return (FALSE);
        }
    }

    return (TRUE);
}

/*******************************************************************************
**
** Function         btm_sec_find_first_serv
**
** Description      Look for the first record in the service database
**                  with specified PSM
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
tBTM_SEC_SERV_REC *btm_sec_find_first_serv (CONNECTION_TYPE conn_type, UINT16 psm)
{
    tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];
    int i;
    BOOLEAN is_originator;

#if (L2CAP_UCD_INCLUDED == TRUE)

    if ( conn_type & CONNECTION_TYPE_ORIG_MASK ) {
        is_originator = TRUE;
    } else {
        is_originator = FALSE;
    }
#else
    is_originator = conn_type;
#endif

    if (is_originator && btm_cb.p_out_serv && btm_cb.p_out_serv->psm == psm) {
        /* If this is outgoing connection and the PSM matches p_out_serv,
         * use it as the current service */
        return btm_cb.p_out_serv;
    }

    /* otherwise, just find the first record with the specified PSM */
    for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) {
        if ( (p_serv_rec->security_flags & BTM_SEC_IN_USE) && (p_serv_rec->psm == psm) ) {
            return (p_serv_rec);
        }
    }
    return (NULL);
}


/*******************************************************************************
**
** Function         btm_sec_find_next_serv
**
** Description      Look for the next record in the service database
**                  with specified PSM
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
static tBTM_SEC_SERV_REC *btm_sec_find_next_serv (tBTM_SEC_SERV_REC *p_cur)
{
    tBTM_SEC_SERV_REC *p_serv_rec   = &btm_cb.sec_serv_rec[0];
    int               i;

    for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) {
        if ((p_serv_rec->security_flags & BTM_SEC_IN_USE)
                && (p_serv_rec->psm == p_cur->psm) ) {
            if (p_cur != p_serv_rec) {
                return (p_serv_rec);
            }
        }
    }
    return (NULL);
}

/*******************************************************************************
**
** Function         btm_sec_find_mx_serv
**
** Description      Look for the record in the service database with specified
**                  PSM and multiplexor channel information
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
static tBTM_SEC_SERV_REC *btm_sec_find_mx_serv (UINT8 is_originator, UINT16 psm,
        UINT32 mx_proto_id, UINT32 mx_chan_id)
{
    tBTM_SEC_SERV_REC *p_out_serv = btm_cb.p_out_serv;
    tBTM_SEC_SERV_REC *p_serv_rec = &btm_cb.sec_serv_rec[0];
    int i;

    BTM_TRACE_DEBUG ("%s()\n", __func__);
    if (is_originator && p_out_serv && p_out_serv->psm == psm
            && p_out_serv->mx_proto_id == mx_proto_id
            && p_out_serv->orig_mx_chan_id == mx_chan_id) {
        /* If this is outgoing connection and the parameters match p_out_serv,
         * use it as the current service */
        return btm_cb.p_out_serv;
    }

    /* otherwise, the old way */
    for (i = 0; i < BTM_SEC_MAX_SERVICE_RECORDS; i++, p_serv_rec++) {
        if ((p_serv_rec->security_flags & BTM_SEC_IN_USE)
                && (p_serv_rec->psm == psm)
                && (p_serv_rec->mx_proto_id == mx_proto_id)
                && (( is_originator && (p_serv_rec->orig_mx_chan_id  == mx_chan_id))
                    || (!is_originator && (p_serv_rec->term_mx_chan_id  == mx_chan_id)))) {
            return (p_serv_rec);
        }
    }
    return (NULL);
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_collision_timeout
**
** Description      Encryption could not start because of the collision
**                  try to do it again
**
** Returns          Pointer to the TLE struct
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_collision_timeout (TIMER_LIST_ENT *p_tle)
{
    UNUSED(p_tle);

    BTM_TRACE_EVENT ("%s()\n", __func__);
    btm_cb.sec_collision_tle.param = 0;

    tBTM_STATUS status = btm_sec_execute_procedure (btm_cb.p_collided_dev_rec);

    /* If result is pending reply from the user or from the device is pending */
    if (status != BTM_CMD_STARTED) {
        /* There is no next procedure or start of procedure failed, notify the waiting layer */
        btm_sec_dev_rec_cback_event (btm_cb.p_collided_dev_rec, status, FALSE);
    }
}

/*******************************************************************************
**
** Function         btm_send_link_key_notif
**
** Description      This function is called when controller requests link key
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
static void btm_send_link_key_notif (tBTM_SEC_DEV_REC *p_dev_rec)
{
    if (btm_cb.api.p_link_key_callback) {
        (*btm_cb.api.p_link_key_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
                                           p_dev_rec->sec_bd_name, p_dev_rec->link_key,
                                           p_dev_rec->link_key_type,
                                           p_dev_rec->remote_supports_secure_connections);

    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         BTM_ReadTrustedMask
**
** Description      Get trusted mask for the peer device
**
** Parameters:      bd_addr   - Address of the device
**
** Returns          NULL, if the device record is not found.
**                  otherwise, the trusted mask
**
*******************************************************************************/
UINT32 *BTM_ReadTrustedMask (BD_ADDR bd_addr)
{
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);
    if (p_dev_rec != NULL) {
        return (p_dev_rec->trusted_mask);
    }
    return NULL;
}

/*******************************************************************************
**
** Function         btm_restore_mode
**
** Description      This function returns the security mode to previous setting
**                  if it was changed during bonding.
**
**
** Parameters:      void
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_restore_mode(void)
{
    if (btm_cb.security_mode_changed) {
        btm_cb.security_mode_changed = FALSE;
        BTM_TRACE_DEBUG("%s() Auth enable -> %d\n", __func__, (btm_cb.security_mode == BTM_SEC_MODE_LINK));
        btsnd_hcic_write_auth_enable ((UINT8)(btm_cb.security_mode == BTM_SEC_MODE_LINK));
    }

#if (CLASSIC_BT_INCLUDED == TRUE)
    if (btm_cb.pin_type_changed) {
        btm_cb.pin_type_changed = FALSE;
        btsnd_hcic_write_pin_type (btm_cb.cfg.pin_type);
    }
#endif  ///CLASSIC_BT_INCLUDED == TRUE
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_find_dev_by_sec_state
**
** Description      Look for the record in the device database for the device
**                  which is being authenticated or encrypted
**
** Returns          Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_sec_find_dev_by_sec_state (UINT8 state)
{
#if (SMP_INCLUDED == TRUE)
    tBTM_SEC_DEV_REC *p_dev_rec = NULL;
    list_node_t *p_node = NULL;
    for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
        p_dev_rec = list_node(p_node);
	if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE)
                && (p_dev_rec->sec_state == state)) {
            return (p_dev_rec);
        }
    }
#endif  ///SMP_INCLUDED == TRUE
    return (NULL);
}
/*******************************************************************************
**
** Function         btm_sec_change_pairing_state
**
** Description      This function is called to change pairing state
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static void btm_sec_change_pairing_state (tBTM_PAIRING_STATE new_state)
{
    tBTM_PAIRING_STATE  old_state = btm_cb.pairing_state;
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
    BTM_TRACE_EVENT ("%s()  Old: %s\n", __func__, btm_pair_state_descr(btm_cb.pairing_state));
    BTM_TRACE_EVENT ("%s()  New: %s pairing_flags:0x%x\n\n", __func__,
                     btm_pair_state_descr(new_state), btm_cb.pairing_flags);
#endif  ///BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE

    btm_cb.pairing_state = new_state;

    if (new_state == BTM_PAIR_STATE_IDLE) {
        btu_stop_timer (&btm_cb.pairing_tle);

        btm_cb.pairing_flags = 0;
#if (CLASSIC_BT_INCLUDED == TRUE)
        btm_cb.pin_code_len  = 0;
#endif  ///CLASSIC_BT_INCLUDED == TRUE

        /* Make sure the the lcb shows we are not bonding */
        l2cu_update_lcb_4_bonding (btm_cb.pairing_bda, FALSE);

        btm_restore_mode();
        btm_sec_check_pending_reqs();
        btm_inq_clear_ssp();

        memset (btm_cb.pairing_bda, 0xFF, BD_ADDR_LEN);
    } else {
        /* If transitionng out of idle, mark the lcb as bonding */
        if (old_state == BTM_PAIR_STATE_IDLE) {
            l2cu_update_lcb_4_bonding (btm_cb.pairing_bda, TRUE);
        }

        btm_cb.pairing_tle.param = (TIMER_PARAM_TYPE)btm_sec_pairing_timeout;

        btu_start_timer (&btm_cb.pairing_tle, BTU_TTYPE_USER_FUNC, BTM_SEC_TIMEOUT_VALUE);
    }
}
#endif  ///SMP_INCLUDED == TRUE


/*******************************************************************************
**
** Function         btm_pair_state_descr
**
** Description      Return state description for tracing
**
*******************************************************************************/
#if (BT_USE_TRACES == TRUE && SMP_INCLUDED == TRUE)
static char *btm_pair_state_descr (tBTM_PAIRING_STATE state)
{
#if (BT_TRACE_VERBOSE == TRUE)
    switch (state) {
    case BTM_PAIR_STATE_IDLE:                   return ("IDLE");
    case BTM_PAIR_STATE_GET_REM_NAME:           return ("GET_REM_NAME");
    case BTM_PAIR_STATE_WAIT_PIN_REQ:           return ("WAIT_PIN_REQ");
    case BTM_PAIR_STATE_WAIT_LOCAL_PIN:         return ("WAIT_LOCAL_PIN");
    case BTM_PAIR_STATE_WAIT_NUMERIC_CONFIRM:   return ("WAIT_NUM_CONFIRM");
    case BTM_PAIR_STATE_KEY_ENTRY:              return ("KEY_ENTRY");
    case BTM_PAIR_STATE_WAIT_LOCAL_OOB_RSP:     return ("WAIT_LOCAL_OOB_RSP");
    case BTM_PAIR_STATE_WAIT_LOCAL_IOCAPS:      return ("WAIT_LOCAL_IOCAPS");
    case BTM_PAIR_STATE_INCOMING_SSP:           return ("INCOMING_SSP");
    case BTM_PAIR_STATE_WAIT_AUTH_COMPLETE:     return ("WAIT_AUTH_COMPLETE");
    case BTM_PAIR_STATE_WAIT_DISCONNECT:        return ("WAIT_DISCONNECT");
    }

    return ("???");
#else
    sprintf(btm_cb.state_temp_buffer, "%d", state);

    return (btm_cb.state_temp_buffer);
#endif
}
#endif

/*******************************************************************************
**
** Function         btm_sec_dev_rec_cback_event
**
** Description      This function calls the callback function with the given
**                  result and clear the callback function.
**
** Parameters:      void
**
*******************************************************************************/
void btm_sec_dev_rec_cback_event (tBTM_SEC_DEV_REC *p_dev_rec, UINT8 res, BOOLEAN is_le_transport)
{
    tBTM_SEC_CALLBACK   *p_callback;

    if (p_dev_rec && p_dev_rec->p_callback) {
        p_callback = p_dev_rec->p_callback;
        p_dev_rec->p_callback = NULL;

#if BLE_INCLUDED == TRUE
        if (is_le_transport) {
            (*p_callback) (p_dev_rec->ble.pseudo_addr, BT_TRANSPORT_LE, p_dev_rec->p_ref_data, res);
        } else
#endif
        {
            (*p_callback) (p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR, p_dev_rec->p_ref_data, res);
        }
    }
#if (SMP_INCLUDED == TRUE)
    btm_sec_check_pending_reqs();
#endif  ///SMP_INCLUDED == TRUE
}

/*******************************************************************************
**
** Function         btm_sec_queue_mx_request
**
** Description      Return state description for tracing
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static BOOLEAN btm_sec_queue_mx_request (BD_ADDR bd_addr,  UINT16 psm,  BOOLEAN is_orig,
        UINT32 mx_proto_id, UINT32 mx_chan_id,
        tBTM_SEC_CALLBACK *p_callback, void *p_ref_data)
{
    tBTM_SEC_QUEUE_ENTRY *p_e = (tBTM_SEC_QUEUE_ENTRY *)osi_malloc (sizeof(tBTM_SEC_QUEUE_ENTRY));

    if (p_e) {
        p_e->psm            = psm;
        p_e->is_orig        = is_orig;
        p_e->p_callback     = p_callback;
        p_e->p_ref_data     = p_ref_data;
        p_e->mx_proto_id    = mx_proto_id;
        p_e->mx_chan_id     = mx_chan_id;
        p_e->transport      = BT_TRANSPORT_BR_EDR;

        memcpy (p_e->bd_addr, bd_addr, BD_ADDR_LEN);

        BTM_TRACE_EVENT ("%s() PSM: 0x%04x  Is_Orig: %u  mx_proto_id: %u  mx_chan_id: %u\n",
                         __func__, psm, is_orig, mx_proto_id, mx_chan_id);

    fixed_queue_enqueue(btm_cb.sec_pending_q, p_e, FIXED_QUEUE_MAX_TIMEOUT);

        return (TRUE);
    }

    return (FALSE);
}
static BOOLEAN btm_sec_check_prefetch_pin (tBTM_SEC_DEV_REC  *p_dev_rec)
{
    BOOLEAN rv = FALSE;
#if (CLASSIC_BT_INCLUDED == TRUE)
    UINT8 major = (UINT8)(p_dev_rec->dev_class[1] & BTM_COD_MAJOR_CLASS_MASK);
    UINT8 minor = (UINT8)(p_dev_rec->dev_class[2] & BTM_COD_MINOR_CLASS_MASK);
    rv = TRUE;

    if ((major == BTM_COD_MAJOR_AUDIO)
            &&  ((minor == BTM_COD_MINOR_CONFM_HANDSFREE) || (minor == BTM_COD_MINOR_CAR_AUDIO)) ) {
        BTM_TRACE_EVENT ("%s() Skipping pre-fetch PIN for carkit COD Major: 0x%02x Minor: 0x%02x\n",
                         __func__, major, minor);

        if (btm_cb.security_mode_changed == FALSE) {
            btm_cb.security_mode_changed = TRUE;
#ifdef APPL_AUTH_WRITE_EXCEPTION
            if (!(APPL_AUTH_WRITE_EXCEPTION)(p_dev_rec->bd_addr))
#endif
            {
                btsnd_hcic_write_auth_enable (TRUE);
            }
        }
    } else {
        btm_sec_change_pairing_state (BTM_PAIR_STATE_WAIT_LOCAL_PIN);

        /* If we got a PIN, use that, else try to get one */
        if (btm_cb.pin_code_len) {
            BTM_PINCodeReply (p_dev_rec->bd_addr, BTM_SUCCESS, btm_cb.pin_code_len, btm_cb.pin_code, p_dev_rec->trusted_mask);
        } else {
            /* pin was not supplied - pre-fetch pin code now */
            if (btm_cb.api.p_pin_callback && ((btm_cb.pairing_flags & BTM_PAIR_FLAGS_PIN_REQD) == 0)) {
                BTM_TRACE_DEBUG("%s() PIN code callback called\n", __func__);
                if (btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR) == NULL) {
                    btm_cb.pairing_flags |= BTM_PAIR_FLAGS_PIN_REQD;
                }
                (btm_cb.api.p_pin_callback) (p_dev_rec->bd_addr, p_dev_rec->dev_class,
                                             p_dev_rec->sec_bd_name, (p_dev_rec->p_cur_service == NULL) ? FALSE
                                             : (p_dev_rec->p_cur_service->security_flags
                                                & BTM_SEC_IN_MIN_16_DIGIT_PIN));
            }
        }

        rv = TRUE;
    }
#endif  ///CLASSIC_BT_INCLUDED == TRUE
#
    return rv;
}

/*******************************************************************************
**
** Function         btm_sec_auth_payload_tout
**
** Description      Processes the HCI Autheniticated Payload Timeout Event
**                  indicating that a packet containing a valid MIC on the
**                  connection handle was not received within the programmed
**                  timeout value. (Spec Default is 30 secs, but can be
**                  changed via the BTM_SecSetAuthPayloadTimeout() function.
**
*******************************************************************************/
void btm_sec_auth_payload_tout (UINT8 *p, UINT16 hci_evt_len)
{
    UINT16 handle;

    STREAM_TO_UINT16 (handle, p);
    handle = HCID_GET_HANDLE (handle);

    /* Will be exposed to upper layers in the future if/when determined necessary */
    BTM_TRACE_ERROR ("%s on handle 0x%02x\n", __func__, handle);
}

/*******************************************************************************
**
** Function         btm_sec_queue_encrypt_request
**
** Description      encqueue encryption request when device has active security
**                  process pending.
**
*******************************************************************************/
static BOOLEAN btm_sec_queue_encrypt_request (BD_ADDR bd_addr, tBT_TRANSPORT transport,
        tBTM_SEC_CALLBACK *p_callback, void *p_ref_data)
{
    tBTM_SEC_QUEUE_ENTRY  *p_e;
    p_e = (tBTM_SEC_QUEUE_ENTRY *)osi_malloc(sizeof(tBTM_SEC_QUEUE_ENTRY) + 1);

    if (p_e) {
        p_e->psm  = 0;  /* if PSM 0, encryption request */
        p_e->p_callback  = p_callback;
        p_e->p_ref_data = (void *)(p_e + 1);
        *(UINT8 *)p_e->p_ref_data = *(UINT8 *)(p_ref_data);
        p_e->transport  = transport;
        memcpy(p_e->bd_addr, bd_addr, BD_ADDR_LEN);
        fixed_queue_enqueue(btm_cb.sec_pending_q, p_e, FIXED_QUEUE_MAX_TIMEOUT);
        return TRUE;
    }

    return FALSE;
}

/*******************************************************************************
**
** Function         btm_sec_set_peer_sec_caps
**
** Description      This function is called to set sm4 and rmt_sec_caps fields
**                  based on the available peer device features.
**
** Returns          void
**
*******************************************************************************/
void btm_sec_set_peer_sec_caps(tACL_CONN *p_acl_cb, tBTM_SEC_DEV_REC *p_dev_rec)
{
    BD_ADDR     rem_bd_addr;
    UINT8       *p_rem_bd_addr;

    if ((btm_cb.security_mode == BTM_SEC_MODE_SP ||
            btm_cb.security_mode == BTM_SEC_MODE_SP_DEBUG ||
            btm_cb.security_mode == BTM_SEC_MODE_SC) &&
            HCI_SSP_HOST_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_1])) {
        p_dev_rec->sm4 = BTM_SM4_TRUE;
        p_dev_rec->remote_supports_secure_connections =
            (HCI_SC_HOST_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_1]));
    } else {
        p_dev_rec->sm4 = BTM_SM4_KNOWN;
        p_dev_rec->remote_supports_secure_connections = FALSE;
    }

    BTM_TRACE_API("%s: sm4: 0x%02x, rmt_support_for_secure_connections %d\n", __FUNCTION__,
                  p_dev_rec->sm4, p_dev_rec->remote_supports_secure_connections);

    /* Store previous state of remote device to check if peer device downgraded
     * it's secure connection state. */
#if (CLASSIC_BT_INCLUDED == TRUE)
    if (p_dev_rec->remote_supports_secure_connections >= p_dev_rec->remote_secure_connection_previous_state) {
        p_dev_rec->remote_secure_connection_previous_state = p_dev_rec->remote_supports_secure_connections;
    } else {
        BTM_TRACE_ERROR("Remote Device downgraded security from SC, deleting Link Key");

        /* Mark in ACL packet that secure connection is downgraded. */
        p_acl_cb->sc_downgrade = 1;
        p_dev_rec->remote_secure_connection_previous_state = 0;

        /* As peer device downgraded it's security, peer device is a suspicious
         * device. Hence remove pairing information by removing link key
         * information. */
        memset(p_dev_rec->link_key, 0, LINK_KEY_LEN);
        p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED
                                | BTM_SEC_ENCRYPTED | BTM_SEC_NAME_KNOWN
                                | BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED
                                | BTM_SEC_ROLE_SWITCHED | BTM_SEC_16_DIGIT_PIN_AUTHED);
        return;
    }
#endif

    if (p_dev_rec->remote_features_needed) {
        BTM_TRACE_EVENT("%s: Now device in SC Only mode, waiting for peer remote features!\n",
                        __FUNCTION__);
        p_rem_bd_addr = (UINT8 *) rem_bd_addr;
        BDADDR_TO_STREAM(p_rem_bd_addr, p_dev_rec->bd_addr);
        p_rem_bd_addr = (UINT8 *) rem_bd_addr;
        btm_io_capabilities_req(p_rem_bd_addr);
        p_dev_rec->remote_features_needed = FALSE;
    }
}

/*******************************************************************************
**
** Function         btm_sec_is_serv_level0
**
** Description      This function is called to check if the service corresponding
**                  to PSM is security mode 4 level 0 service.
**
** Returns          TRUE if the service is security mode 4 level 0 service
**
*******************************************************************************/
static BOOLEAN btm_sec_is_serv_level0(UINT16 psm)
{
    if (psm == BT_PSM_SDP) {
        BTM_TRACE_DEBUG("%s: PSM: 0x%04x -> mode 4 level 0 service\n", __FUNCTION__, psm);
        return TRUE;
    }
    return FALSE;
}

/*******************************************************************************
**
** Function         btm_sec_check_pending_enc_req
**
** Description      This function is called to send pending encryption callback if
**                  waiting
**
** Returns          void
**
*******************************************************************************/
static void btm_sec_check_pending_enc_req (tBTM_SEC_DEV_REC  *p_dev_rec, tBT_TRANSPORT transport,
        UINT8 encr_enable)
{
    if (fixed_queue_is_empty(btm_cb.sec_pending_q)) {
        return;
    }

    UINT8 res = encr_enable ? BTM_SUCCESS : BTM_ERR_PROCESSING;
    list_t *list = fixed_queue_get_list(btm_cb.sec_pending_q);
    for (const list_node_t *node = list_begin(list); node != list_end(list); ) {
        tBTM_SEC_QUEUE_ENTRY *p_e = (tBTM_SEC_QUEUE_ENTRY *)list_node(node);
        node = list_next(node);

        if (memcmp(p_e->bd_addr, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0 && p_e->psm == 0
#if BLE_INCLUDED == TRUE
            && p_e->transport == transport
#endif
           ) {
#if BLE_INCLUDED == TRUE
            UINT8 sec_act = *(UINT8 *)(p_e->p_ref_data);
#endif

            if (encr_enable == 0 || transport == BT_TRANSPORT_BR_EDR
#if BLE_INCLUDED == TRUE
                    || (sec_act == BTM_BLE_SEC_ENCRYPT || sec_act == BTM_BLE_SEC_ENCRYPT_NO_MITM)
                    || (sec_act == BTM_BLE_SEC_ENCRYPT_MITM && p_dev_rec->sec_flags
                    & BTM_SEC_LE_AUTHENTICATED)
#endif
               ) {
                if (p_e->p_callback) {
                    (*p_e->p_callback) (p_dev_rec->bd_addr, transport, p_e->p_ref_data, res);
                }

				fixed_queue_try_remove_from_queue(btm_cb.sec_pending_q, (void *)p_e);
            }
        }
    }
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_set_serv_level4_flags
**
** Description      This function is called to set security mode 4 level 4 flags.
**
** Returns          service security requirements updated to include secure
**                  connections only mode.
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static UINT16 btm_sec_set_serv_level4_flags(UINT16 cur_security, BOOLEAN is_originator)
{
    UINT16  sec_level4_flags = is_originator ? BTM_SEC_OUT_LEVEL4_FLAGS : BTM_SEC_IN_LEVEL4_FLAGS;

    return cur_security | sec_level4_flags;
}
#endif  ///SMP_INCLUDED == TRUE

/*******************************************************************************
**
** Function         btm_sec_clear_ble_keys
**
** Description      This function is called to clear out the BLE keys.
**                  Typically when devices are removed in BTM_SecDeleteDevice,
**                  or when a new BT Link key is generated.
**
** Returns          void
**
*******************************************************************************/
#if (BLE_INCLUDED == TRUE)
void btm_sec_clear_ble_keys (tBTM_SEC_DEV_REC  *p_dev_rec)
{

    BTM_TRACE_DEBUG ("%s() Clearing BLE Keys\n", __func__);
#if (SMP_INCLUDED== TRUE)
    p_dev_rec->ble.key_type = BTM_LE_KEY_NONE;
    memset (&p_dev_rec->ble.keys, 0, sizeof(tBTM_SEC_BLE_KEYS));

#if (BLE_PRIVACY_SPT == TRUE)
    btm_ble_resolving_list_remove_dev(p_dev_rec);
#endif
#endif
}
#endif  ///BLE_INCLUDED == TRUE
/*******************************************************************************
**
** Function         btm_sec_is_a_bonded_dev
**
** Description       Is the specified device is a bonded device
**
** Returns          TRUE - dev is bonded
**
*******************************************************************************/
BOOLEAN btm_sec_is_a_bonded_dev (BD_ADDR bda)
{

    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda);
    BOOLEAN is_bonded = FALSE;

    if (p_dev_rec &&
#if (SMP_INCLUDED == TRUE && BLE_INCLUDED == TRUE)
            ((p_dev_rec->ble.key_type && (p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN)) ||
#else
            (
#endif
             (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN))) {
        is_bonded = TRUE;
    }
    BTM_TRACE_DEBUG ("%s() is_bonded=%d\n", __func__, is_bonded);
    return (is_bonded);
}

/*******************************************************************************
**
** Function         btm_sec_is_le_capable_dev
**
** Description       Is the specified device is dual mode or LE only device
**
** Returns          TRUE - dev is a dual mode
**
*******************************************************************************/
BOOLEAN btm_sec_is_le_capable_dev (BD_ADDR bda)
{
    BOOLEAN le_capable = FALSE;

#if (BLE_INCLUDED== TRUE)
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bda);
    if (p_dev_rec && (p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) == BT_DEVICE_TYPE_BLE) {
        le_capable  = TRUE;
    }
#endif
    return le_capable;
}

/*******************************************************************************
**
** Function         btm_sec_find_bonded_dev
**
** Description      Find a bonded device starting from the specified index
**
** Returns          TRUE - found a bonded device
**
*******************************************************************************/
#if (BLE_INCLUDED == TRUE)
BOOLEAN btm_sec_find_bonded_dev (UINT8 start_idx, UINT16 *p_found_handle, tBTM_SEC_DEV_REC **p_rec)
{
    BOOLEAN found = FALSE;

#if (SMP_INCLUDED== TRUE)
    tBTM_SEC_DEV_REC *p_dev_rec;
    list_node_t *p_node  = NULL;
    for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
        p_dev_rec = list_node(p_node);
        if (p_dev_rec->ble.key_type || (p_dev_rec->sec_flags & BTM_SEC_LINK_KEY_KNOWN)) {
            *p_found_handle = p_dev_rec->hci_handle;
            *p_rec = p_dev_rec;
            break;
        }
    }
    BTM_TRACE_DEBUG ("%s() found=%d\n", __func__, found);
#endif
    return (found);
}
#endif  ///BLE_INCLUDED == TRUE
/*******************************************************************************
**
** Function         btm_sec_use_smp_br_chnl
**
** Description      The function checks if SMP BR connection can be used with
**                  the peer.
**                  Is called when authentication for dedicated bonding is
**                  successfully completed.
**
** Returns          TRUE - if SMP BR connection can be used (the link key is
**                         generated from P-256 and the peer supports Security
**                         Manager over BR).
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE)
static BOOLEAN btm_sec_use_smp_br_chnl(tBTM_SEC_DEV_REC *p_dev_rec)
{
    UINT32  ext_feat;
    UINT8   chnl_mask[L2CAP_FIXED_CHNL_ARRAY_SIZE];

    BTM_TRACE_DEBUG ("%s() link_key_type = 0x%x\n", __func__,
                     p_dev_rec->link_key_type);

    if ((p_dev_rec->link_key_type != BTM_LKEY_TYPE_UNAUTH_COMB_P_256) &&
            (p_dev_rec->link_key_type != BTM_LKEY_TYPE_AUTH_COMB_P_256)) {
        return FALSE;
    }

    if (!L2CA_GetPeerFeatures (p_dev_rec->bd_addr, &ext_feat, chnl_mask)) {
        return FALSE;
    }

    if (!(chnl_mask[0] & L2CAP_FIXED_CHNL_SMP_BR_BIT)) {
        return FALSE;
    }

    return TRUE;
}

/*******************************************************************************
**
** Function         btm_sec_is_master
**
** Description      The function checks if the device is BR/EDR master after
**                  pairing is completed.
**
** Returns          TRUE - if the device is master.
**
*******************************************************************************/
static BOOLEAN btm_sec_is_master(tBTM_SEC_DEV_REC *p_dev_rec)
{
    tACL_CONN *p = btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR);
    return (p && (p->link_role == BTM_ROLE_MASTER));
}

#if (CLASSIC_BT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function         btm_sec_legacy_authentication_mutual
**
** Description      This function is called when legacy authentication is used
**                  and only remote device has completed the authentication
**
** Returns          TRUE if aunthentication command sent successfully
**
*******************************************************************************/
BOOLEAN btm_sec_legacy_authentication_mutual (tBTM_SEC_DEV_REC *p_dev_rec)
{
    return (btm_sec_start_authentication (p_dev_rec));
}

/*******************************************************************************
**
** Function         btm_sec_update_legacy_auth_state
**
** Description      This function updates the legacy authentication state
**
** Returns          void
**
*******************************************************************************/
void btm_sec_update_legacy_auth_state(tACL_CONN *p_acl_cb, UINT8 legacy_auth_state)
{
    if (p_acl_cb) {
        tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev_by_handle (p_acl_cb->hci_handle);
        if (p_dev_rec) {
            if ((BTM_BothEndsSupportSecureConnections(p_dev_rec->bd_addr) == 0) &&
                 (legacy_auth_state != BTM_ACL_LEGACY_AUTH_NONE)) {
                p_acl_cb->legacy_auth_state |= legacy_auth_state;
            } else {
                p_acl_cb->legacy_auth_state = BTM_ACL_LEGACY_AUTH_NONE;
            }
        }
    }
}

/*******************************************************************************
**
** Function         btm_sec_handle_remote_legacy_auth_cmp
**
** Description      This function updates the legacy authneticaiton state
**                  to indicate that remote device has completed the authentication
**
** Returns          void
**
*******************************************************************************/
void btm_sec_handle_remote_legacy_auth_cmp(UINT16 handle)
{
    tBTM_SEC_DEV_REC  *p_dev_rec = btm_find_dev_by_handle (handle);
    tACL_CONN         *p_acl_cb  = btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR);
    btm_sec_update_legacy_auth_state(p_acl_cb, BTM_ACL_LEGACY_AUTH_REMOTE);
}
#endif /// (CLASSIC_BT_INCLUDED == TRUE)
#endif  ///SMP_INCLUDED == TRUE

/******************************************************************************
 **
 ** Function         btm_sec_dev_authorization
 **
 ** Description      This function is used to authorize a specified device(BLE)
 **
 ******************************************************************************
 */
#if (BLE_INCLUDED == TRUE)
BOOLEAN btm_sec_dev_authorization(BD_ADDR bd_addr, BOOLEAN authorized)
{
#if (SMP_INCLUDED == TRUE)
    UINT8  sec_flag = 0;
    tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
    if (p_dev_rec) {
        sec_flag = (UINT8)(p_dev_rec->sec_flags >> 8);
        if (!(sec_flag & BTM_SEC_LINK_KEY_AUTHED)) {
            BTM_TRACE_ERROR("Authorized should after successful Authentication(MITM protection)\n");
            return FALSE;
        }

        if (authorized) {
            p_dev_rec->sec_flags |= BTM_SEC_LE_AUTHORIZATION;
        } else {
            p_dev_rec->sec_flags &= ~(BTM_SEC_LE_AUTHORIZATION);
        }
    } else {
        BTM_TRACE_ERROR("%s, can't find device\n", __func__);
        return FALSE;
    }
    return TRUE;
#endif  ///SMP_INCLUDED == TRUE
    return FALSE;
}
#endif  /// BLE_INCLUDE == TRUE