esp-idf/components/bt/host/bluedroid/stack/smp/smp_main.c

/******************************************************************************
 *
 *  Copyright (C) 2003-2012 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.
 *
 ******************************************************************************/

#include "common/bt_target.h"

#if SMP_INCLUDED == TRUE

#include <string.h>
#include "smp_int.h"

const char *const smp_state_name [] = {
    "SMP_STATE_IDLE",
    "SMP_STATE_WAIT_APP_RSP",
    "SMP_STATE_SEC_REQ_PENDING",
    "SMP_STATE_PAIR_REQ_RSP",
    "SMP_STATE_WAIT_CONFIRM",
    "SMP_STATE_CONFIRM",
    "SMP_STATE_RAND",
    "SMP_STATE_PUBLIC_KEY_EXCH",
    "SMP_STATE_SEC_CONN_PHS1_START",
    "SMP_STATE_WAIT_COMMITMENT",
    "SMP_STATE_WAIT_NONCE",
    "SMP_STATE_SEC_CONN_PHS2_START",
    "SMP_STATE_WAIT_DHK_CHECK",
    "SMP_STATE_DHK_CHECK",
    "SMP_STATE_ENCRYPTION_PENDING",
    "SMP_STATE_BOND_PENDING",
    "SMP_STATE_CREATE_LOCAL_SEC_CONN_OOB_DATA",
    "SMP_STATE_MAX"
};

const char *const smp_event_name [] = {
    "PAIRING_REQ_EVT",
    "PAIRING_RSP_EVT",
    "CONFIRM_EVT",
    "RAND_EVT",
    "PAIRING_FAILED_EVT",
    "ENC_INFO_EVT",
    "MASTER_ID_EVT",
    "ID_INFO_EVT",
    "ID_ADDR_EVT",
    "SIGN_INFO_EVT",
    "SECURITY_REQ_EVT",
    "PAIR_PUBLIC_KEY_EVT",
    "PAIR_DHKEY_CHECK_EVT",
    "PAIR_KEYPRESS_NOTIFICATION_EVT",
    "PAIR_COMMITMENT_EVT",
    "KEY_READY_EVT",
    "ENCRYPTED_EVT",
    "L2CAP_CONN_EVT",
    "L2CAP_DISCONN_EVT",
    "API_IO_RSP_EVT",
    "API_SEC_GRANT_EVT",
    "TK_REQ_EVT",
    "AUTH_CMPL_EVT",
    "ENC_REQ_EVT",
    "BOND_REQ_EVT",
    "DISCARD_SEC_REQ_EVT",
    "PUBLIC_KEY_EXCHANGE_REQ_EVT",
    "LOCAL_PUBLIC_KEY_CRTD_EVT",
    "BOTH_PUBLIC_KEYS_RCVD_EVT",
    "SEC_CONN_DHKEY_COMPLETE_EVT",
    "HAVE_LOCAL_NONCE_EVT",
    "SEC_CONN_PHASE1_CMPLT_EVT",
    "SEC_CONN_CALC_NC_EVT",
    "SEC_CONN_DISPLAY_NC_EVT",
    "SEC_CONN_OK_EVT",
    "SEC_CONN_2_DHCK_CHECKS_PRESENT_EVT",
    "SEC_CONN_KEY_READY_EVT",
    "KEYPRESS_NOTIFICATION_EVT",
    "SEC_CONN_OOB_DATA_EVT",
    "CREATE_LOCAL_SEC_CONN_OOB_DATA_EVT",
    "OUT_OF_RANGE_EVT"
};

const char *smp_get_event_name(tSMP_EVENT event);
const char *smp_get_state_name(tSMP_STATE state);

#define SMP_SM_IGNORE       0
#define SMP_NUM_ACTIONS     2
#define SMP_SME_NEXT_STATE  2
#define SMP_SM_NUM_COLS     3

typedef const UINT8(*tSMP_SM_TBL)[SMP_SM_NUM_COLS];

enum {
    SMP_PROC_SEC_REQ,
    SMP_SEND_PAIR_REQ,
    SMP_SEND_PAIR_RSP,
    SMP_SEND_CONFIRM,
    SMP_SEND_PAIR_FAIL,
    SMP_SEND_RAND,
    SMP_SEND_ENC_INFO,
    SMP_SEND_ID_INFO,
    SMP_SEND_LTK_REPLY,
    SMP_PROC_PAIR_CMD,
    SMP_PROC_PAIR_FAIL,
    SMP_PROC_CONFIRM,
    SMP_PROC_RAND,
    SMP_PROC_ENC_INFO,
    SMP_PROC_MASTER_ID,
    SMP_PROC_ID_INFO,
    SMP_PROC_ID_ADDR,
    SMP_PROC_SRK_INFO,
    SMP_PROC_SEC_GRANT,
    SMP_PROC_SL_KEY,
    SMP_PROC_COMPARE,
    SMP_PROC_IO_RSP,
    SMP_GENERATE_COMPARE,
    SMP_GENERATE_CONFIRM,
    SMP_GENERATE_STK,
    SMP_KEY_DISTRIBUTE,
    SMP_START_ENC,
    SMP_PAIRING_CMPL,
    SMP_DECIDE_ASSO_MODEL,
    SMP_SEND_APP_CBACK,
    SMP_CHECK_AUTH_REQ,
    SMP_PAIR_TERMINATE,
    SMP_ENC_CMPL,
    SMP_PROC_DISCARD,
    SMP_CREATE_PRIVATE_KEY,
    SMP_USE_OOB_PRIVATE_KEY,
    SMP_SEND_PAIR_PUBLIC_KEY,
    SMP_PROCESS_PAIR_PUBLIC_KEY,
    SMP_HAVE_BOTH_PUBLIC_KEYS,
    SMP_START_SEC_CONN_PHASE1,
    SMP_PROCESS_LOCAL_NONCE,
    SMP_SEND_COMMITMENT,
    SMP_PROCESS_PAIRING_COMMITMENT,
    SMP_PROCESS_PEER_NONCE,
    SMP_CALCULATE_LOCAL_DHKEY_CHECK,
    SMP_SEND_DHKEY_CHECK,
    SMP_PROCESS_DHKEY_CHECK,
    SMP_CALCULATE_PEER_DHKEY_CHECK,
    SMP_MATCH_DHKEY_CHECKS,
    SMP_CALCULATE_NUMERIC_COMPARISON_DISPLAY_NUMBER,
    SMP_MOVE_TO_SEC_CONN_PHASE2,
    SMP_PH2_DHKEY_CHECKS_ARE_PRESENT,
    SMP_WAIT_FOR_BOTH_PUBLIC_KEYS,
    SMP_START_PASSKEY_VERIFICATION,
    SMP_SEND_KEYPRESS_NOTIFICATION,
    SMP_PROCESS_KEYPRESS_NOTIFICATION,
    SMP_PROCESS_SECURE_CONNECTION_OOB_DATA,
    SMP_SET_LOCAL_OOB_KEYS,
    SMP_SET_LOCAL_OOB_RAND_COMMITMENT,
    SMP_IDLE_TERMINATE,
    SMP_FAST_CONN_PARAM,
    SMP_SM_NO_ACTION
};

#if (BLE_INCLUDED == TRUE)
static const tSMP_ACT smp_sm_action[SMP_SM_NO_ACTION] = {
    smp_proc_sec_req,
    smp_send_pair_req,
    smp_send_pair_rsp,
    smp_send_confirm,
    smp_send_pair_fail,
    smp_send_rand,
    smp_send_enc_info,
    smp_send_id_info,
    smp_send_ltk_reply,
    smp_proc_pair_cmd,
    smp_proc_pair_fail,
    smp_proc_confirm,
    smp_proc_rand,
    smp_proc_enc_info,
    smp_proc_master_id,
    smp_proc_id_info,
    smp_proc_id_addr,
    smp_proc_srk_info,
    smp_proc_sec_grant,
    smp_proc_sl_key,
    smp_proc_compare,
    smp_process_io_response,
    smp_generate_compare,
    smp_generate_srand_mrand_confirm,
    smp_generate_stk,
    smp_key_distribution,
    smp_start_enc,
    smp_pairing_cmpl,
    smp_decide_association_model,
    smp_send_app_cback,
    smp_check_auth_req,
    smp_pair_terminate,
    smp_enc_cmpl,
    smp_proc_discard,
    smp_create_private_key,
    smp_use_oob_private_key,
    smp_send_pair_public_key,
    smp_process_pairing_public_key,
    smp_both_have_public_keys,
    smp_start_secure_connection_phase1,
    smp_process_local_nonce,
    smp_send_commitment,
    smp_process_pairing_commitment,
    smp_process_peer_nonce,
    smp_calculate_local_dhkey_check,
    smp_send_dhkey_check,
    smp_process_dhkey_check,
    smp_calculate_peer_dhkey_check,
    smp_match_dhkey_checks,
    smp_calculate_numeric_comparison_display_number,
    smp_move_to_secure_connections_phase2,
    smp_phase_2_dhkey_checks_are_present,
    smp_wait_for_both_public_keys,
    smp_start_passkey_verification,
    smp_send_keypress_notification,
    smp_process_keypress_notification,
    smp_process_secure_connection_oob_data,
    smp_set_local_oob_keys,
    smp_set_local_oob_random_commitment,
    smp_idle_terminate,
    smp_fast_conn_param
};
#else
static const tSMP_ACT smp_sm_action[SMP_SM_NO_ACTION] = {NULL};
#endif  ///BLE_INCLUDED == TRUE

/************ SMP Master FSM State/Event Indirection Table **************/
static const UINT8 smp_master_entry_map[][SMP_STATE_MAX] = {
    /* state name:             Idle WaitApp SecReq Pair   Wait Confirm Rand PublKey SCPhs1  Wait  Wait  SCPhs2  Wait   DHKChk Enc   Bond  CrLocSc
                                     Rsp    Pend   ReqRsp Cfm               Exch    Strt    Cmtm  Nonce Strt    DHKChk        Pend  Pend  OobData   */
    /* PAIR_REQ             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_RSP             */{ 0,    0,     0,      1,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* CONFIRM              */{ 0,    0,     0,      0,     0,   1,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* RAND                 */{ 0,    0,     0,      0,     0,   0,    1,   0,      0,      0,    1,    0,      0,     0,     0,    0,     0   },
    /* PAIR_FAIL            */{ 0,    0x81,  0,      0x81,  0x81, 0x81, 0x81, 0x81,   0x81,   0x81, 0x81, 0x81,   0x81,  0x81,  0,    0x81,     0   },
    /* ENC_INFO             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    1,     0   },
    /* MASTER_ID            */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    4,     0   },
    /* ID_INFO              */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    2,     0   },
    /* ID_ADDR              */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    5,     0   },
    /* SIGN_INFO            */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    3,     0   },
    /* SEC_REQ              */{ 2,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_PUBLIC_KEY      */{ 0,    0,     0,      0,     0,   0,    0,   2,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_DHKEY_CHCK      */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      1,     0,     0,    0,     0   },
    /* PAIR_KEYPR_NOTIF     */{ 0,    8,     0,      0,     0,   0,    0,   0,      5,      2,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_COMMITM         */{ 0,    0,     0,      0,     0,   0,    0,   0,      6,      1,    0,    0,      0,     0,     0,    0,     0   },
    /* KEY_READY            */{ 0,    3,     0,      3,     1,   0,    2,   0,      4,      0,    0,    0,      0,     0,     1,    6,     0   },
    /* ENC_CMPL             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     2,    0,     0   },
    /* L2C_CONN             */{ 1,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* L2C_DISC             */{ 3,    0x83,  0,      0x83,  0x83, 0x83, 0x83, 0x83,   0x83,   0x83, 0x83, 0x83,   0x83,  0x83,  0x83, 0x83,  0   },
    /* IO_RSP               */{ 0,    2,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SEC_GRANT            */{ 0,    1,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* TK_REQ               */{ 0,    0,     0,      2,     0,   0,    0,   0,      3,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* AUTH_CMPL            */{ 4,    0x82,  0,      0x82,  0x82, 0x82, 0x82, 0x82,   0x82,   0x82, 0x82, 0x82,   0x82,  0x82,  0x82, 0x82,  0   },
    /* ENC_REQ              */{ 0,    4,     0,      0,     0,   0,    3,   0,      0,      0,    0,    0,      0,     2,     0,    0,     0   },
    /* BOND_REQ             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     3,    0,     0   },
    /* DISCARD_SEC_REQ      */{ 0,    5,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     3,    0,     0   },
    /* PUBL_KEY_EXCH_REQ    */{ 0,    0,     0,      4,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* LOC_PUBL_KEY_CRTD    */{ 0,    0,     0,      0,     0,   0,    0,   1,      0,      0,    0,    0,      0,     0,     0,    0,     1   },
    /* BOTH_PUBL_KEYS_RCVD  */{ 0,    0,     0,      0,     0,   0,    0,   3,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_DHKEY_CMPLT       */{ 0,    0,     0,      0,     0,   0,    0,   0,      1,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* HAVE_LOC_NONCE       */{ 0,    0,     0,      0,     0,   0,    0,   0,      2,      0,    0,    0,      0,     0,     0,    0,     2   },
    /* SC_PHASE1_CMPLT      */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    1,      0,     0,     0,    0,     0   },
    /* SC_CALC_NC           */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    2,    0,      0,     0,     0,    0,     0   },
    /* SC_DSPL_NC           */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    3,    0,      0,     0,     0,    0,     0   },
    /* SC_NC_OK             */{ 0,    6,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_2_DHCK_CHKS_PRES  */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_KEY_READY         */{ 0,    7,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     1,     0,    0,     0   },
    /* KEYPR_NOTIF          */{ 0,    9,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_OOB_DATA          */{ 0,    10,    0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* CR_LOC_SC_OOB_DATA   */{ 5,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
};

static const UINT8 smp_all_table[][SMP_SM_NUM_COLS] = {
    /*                       Event                     Action                 Next State */
    /* PAIR_FAIL */          {SMP_PROC_PAIR_FAIL,      SMP_PAIRING_CMPL, SMP_STATE_IDLE},
    /* AUTH_CMPL */          {SMP_SEND_PAIR_FAIL,      SMP_PAIRING_CMPL, SMP_STATE_IDLE},
    /* L2C_DISC  */          {SMP_PAIR_TERMINATE,      SMP_SM_NO_ACTION, SMP_STATE_IDLE}
};

static const UINT8 smp_master_idle_table[][SMP_SM_NUM_COLS] = {
    /*                   Event                  Action               Next State */
    /* L2C_CONN */      {SMP_SEND_APP_CBACK,     SMP_SM_NO_ACTION,   SMP_STATE_WAIT_APP_RSP},
    /* SEC_REQ  */      {SMP_PROC_SEC_REQ,       SMP_SEND_APP_CBACK, SMP_STATE_WAIT_APP_RSP},
    /* L2C_DISC  */     {SMP_IDLE_TERMINATE,     SMP_SM_NO_ACTION, SMP_STATE_IDLE},
    /* AUTH_CMPL */     {SMP_PAIRING_CMPL,       SMP_SM_NO_ACTION, SMP_STATE_IDLE}
    /* CR_LOC_SC_OOB_DATA   */ , {SMP_CREATE_PRIVATE_KEY, SMP_SM_NO_ACTION, SMP_STATE_CREATE_LOCAL_SEC_CONN_OOB_DATA}

};

static const UINT8 smp_master_wait_for_app_response_table[][SMP_SM_NUM_COLS] = {
    /*                            Event                Action               Next State */
    /* SEC_GRANT            */ {SMP_PROC_SEC_GRANT, SMP_SEND_APP_CBACK, SMP_STATE_WAIT_APP_RSP},
    /* IO_RSP               */ {SMP_SEND_PAIR_REQ, SMP_FAST_CONN_PARAM, SMP_STATE_PAIR_REQ_RSP},

    /* TK ready */
    /* KEY_READY            */ {SMP_GENERATE_CONFIRM, SMP_SM_NO_ACTION,   SMP_STATE_WAIT_CONFIRM},

    /* start enc mode setup */
    /* ENC_REQ              */ { SMP_START_ENC, SMP_FAST_CONN_PARAM, SMP_STATE_ENCRYPTION_PENDING},
    /* DISCARD_SEC_REQ      */ { SMP_PROC_DISCARD, SMP_SM_NO_ACTION, SMP_STATE_IDLE}
    /* user confirms NC 'OK', i.e. phase 1 is completed */
    /* SC_NC_OK             */, { SMP_MOVE_TO_SEC_CONN_PHASE2, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS2_START},
    /* user-provided passkey is rcvd */
    /* SC_KEY_READY  */ { SMP_START_PASSKEY_VERIFICATION, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
    /* PAIR_KEYPR_NOTIF */ { SMP_PROCESS_KEYPRESS_NOTIFICATION, SMP_SEND_APP_CBACK, SMP_STATE_WAIT_APP_RSP},
    /* KEYPR_NOTIF          */ { SMP_SEND_KEYPRESS_NOTIFICATION, SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
    /* SC_OOB_DATA      */ { SMP_USE_OOB_PRIVATE_KEY, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH}
};

static const UINT8 smp_master_pair_request_response_table[][SMP_SM_NUM_COLS] = {
    /*               Event                  Action                  Next State */
    /* PAIR_RSP */ { SMP_PROC_PAIR_CMD,     SMP_SM_NO_ACTION, SMP_STATE_PAIR_REQ_RSP},
    /* TK_REQ   */ { SMP_SEND_APP_CBACK,    SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},

    /* TK ready */
    /* KEY_READY */{ SMP_GENERATE_CONFIRM,  SMP_SM_NO_ACTION, SMP_STATE_WAIT_CONFIRM}
    /* PUBL_KEY_EXCH_REQ    */, { SMP_CREATE_PRIVATE_KEY, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH}
};

static const UINT8 smp_master_wait_for_confirm_table[][SMP_SM_NUM_COLS] = {
    /*              Event                   Action          Next State */
    /* KEY_READY*/ {SMP_SEND_CONFIRM,     SMP_SM_NO_ACTION, SMP_STATE_CONFIRM}/* CONFIRM ready */
};

static const UINT8 smp_master_confirm_table[][SMP_SM_NUM_COLS] = {
    /*               Event                  Action                 Next State */
    /* CONFIRM  */ { SMP_PROC_CONFIRM, SMP_SEND_RAND, SMP_STATE_RAND}
};

static const UINT8 smp_master_rand_table[][SMP_SM_NUM_COLS] = {
    /*               Event                  Action                   Next State */
    /* RAND     */ { SMP_PROC_RAND,         SMP_GENERATE_COMPARE, SMP_STATE_RAND},
    /* KEY_READY*/ { SMP_PROC_COMPARE,      SMP_SM_NO_ACTION,   SMP_STATE_RAND},  /* Compare ready */
    /* ENC_REQ  */ { SMP_GENERATE_STK,      SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING}
};

static const UINT8 smp_master_public_key_exchange_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                        Action              Next State */
    /* LOC_PUBL_KEY_CRTD    */{ SMP_SEND_PAIR_PUBLIC_KEY, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH},
    /* PAIR_PUBLIC_KEY      */{ SMP_PROCESS_PAIR_PUBLIC_KEY, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH},
    /* BOTH_PUBL_KEYS_RCVD  */{ SMP_HAVE_BOTH_PUBLIC_KEYS, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
};

static const UINT8 smp_master_sec_conn_phs1_start_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                Next State */
    /* SC_DHKEY_CMPLT       */{ SMP_START_SEC_CONN_PHASE1, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
    /* HAVE_LOC_NONCE       */{ SMP_PROCESS_LOCAL_NONCE, SMP_SM_NO_ACTION, SMP_STATE_WAIT_COMMITMENT},
    /* TK_REQ               */{ SMP_SEND_APP_CBACK,    SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
    /* SMP_MODEL_SEC_CONN_PASSKEY_DISP model, passkey is sent up to display,*/
    /* It's time to start commitment calculation */
    /* KEY_READY            */{ SMP_START_PASSKEY_VERIFICATION, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
    /* PAIR_KEYPR_NOTIF  */{ SMP_PROCESS_KEYPRESS_NOTIFICATION,  SMP_SEND_APP_CBACK, SMP_STATE_SEC_CONN_PHS1_START},
    /* PAIR_COMMITM  */{ SMP_PROCESS_PAIRING_COMMITMENT, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
};

static const UINT8 smp_master_wait_commitment_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* PAIR_COMMITM         */{ SMP_PROCESS_PAIRING_COMMITMENT, SMP_SEND_RAND, SMP_STATE_WAIT_NONCE},
    /* PAIR_KEYPR_NOTIF */{ SMP_PROCESS_KEYPRESS_NOTIFICATION, SMP_SEND_APP_CBACK, SMP_STATE_WAIT_COMMITMENT},
};

static const UINT8 smp_master_wait_nonce_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* peer nonce is received */
    /* RAND                 */{SMP_PROC_RAND,  SMP_PROCESS_PEER_NONCE, SMP_STATE_SEC_CONN_PHS2_START},
    /* NC model, time to calculate number for NC */
    /* SC_CALC_NC           */{SMP_CALCULATE_NUMERIC_COMPARISON_DISPLAY_NUMBER, SMP_SM_NO_ACTION, SMP_STATE_WAIT_NONCE},
    /* NC model, time to display calculated number for NC to the user */
    /* SC_DSPL_NC           */{SMP_SEND_APP_CBACK, SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
};

static const UINT8 smp_master_sec_conn_phs2_start_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* SC_PHASE1_CMPLT */{SMP_CALCULATE_LOCAL_DHKEY_CHECK, SMP_SEND_DHKEY_CHECK, SMP_STATE_WAIT_DHK_CHECK},
};

static const UINT8 smp_master_wait_dhk_check_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* PAIR_DHKEY_CHCK  */{SMP_PROCESS_DHKEY_CHECK, SMP_CALCULATE_PEER_DHKEY_CHECK, SMP_STATE_DHK_CHECK},
};

static const UINT8 smp_master_dhk_check_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* locally calculated peer dhkey check is ready -> compare it withs DHKey Check actually received from peer */
    /* SC_KEY_READY         */{SMP_MATCH_DHKEY_CHECKS, SMP_SM_NO_ACTION, SMP_STATE_DHK_CHECK},
    /* locally calculated peer dhkey check is ready -> calculate STK, go to sending */
    /* HCI LE Start Encryption command */
    /* ENC_REQ              */{SMP_GENERATE_STK, SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},
};

static const UINT8 smp_master_enc_pending_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* STK ready */
    /* KEY_READY */ { SMP_START_ENC,        SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},
    /* ENCRYPTED */ { SMP_CHECK_AUTH_REQ,   SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},
    /* BOND_REQ  */ { SMP_KEY_DISTRIBUTE,   SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING}
};
static const UINT8 smp_master_bond_pending_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* ENC_INFO */ { SMP_PROC_ENC_INFO,     SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* ID_INFO  */ { SMP_PROC_ID_INFO,      SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* SIGN_INFO*/ { SMP_PROC_SRK_INFO,     SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* MASTER_ID*/ { SMP_PROC_MASTER_ID,    SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* ID_ADDR  */ { SMP_PROC_ID_ADDR,      SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* KEY_READY */{SMP_SEND_ENC_INFO,      SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING} /* LTK ready */
};

static const UINT8 smp_master_create_local_sec_conn_oob_data[][SMP_SM_NUM_COLS] = {
    /*                       Event                   Action            Next State */
    /* LOC_PUBL_KEY_CRTD */ {SMP_SET_LOCAL_OOB_KEYS,   SMP_SM_NO_ACTION, SMP_STATE_CREATE_LOCAL_SEC_CONN_OOB_DATA},
    /* HAVE_LOC_NONCE    */ {SMP_SET_LOCAL_OOB_RAND_COMMITMENT, SMP_SM_NO_ACTION, SMP_STATE_IDLE}
};


/************ SMP Slave FSM State/Event Indirection Table **************/
static const UINT8 smp_slave_entry_map[][SMP_STATE_MAX] = {
    /* state name:             Idle WaitApp SecReq Pair   Wait Confirm Rand PublKey SCPhs1  Wait  Wait  SCPhs2  Wait   DHKChk Enc   Bond  CrLocSc
                                     Rsp    Pend   ReqRsp Cfm               Exch    Strt    Cmtm  Nonce Strt    DHKChk        Pend  Pend  OobData   */
    /* PAIR_REQ             */{ 2,    0,     1,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_RSP             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* CONFIRM              */{ 0,    4,     0,      1,     1,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* RAND                 */{ 0,    0,     0,      0,     0,   1,    2,   0,      0,      0,    1,    0,      0,     0,     0,    0,     0   },
    /* PAIR_FAIL            */{ 0,    0x81,  0x81,   0x81,  0x81, 0x81, 0x81, 0x81,   0x81,   0x81, 0x81, 0x81,   0x81,  0x81,  0x81, 0,     0   },
    /* ENC_INFO             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    3,     0   },
    /* MASTER_ID            */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    5,     0   },
    /* ID_INFO              */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    4,     0   },
    /* ID_ADDR              */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    6,     0   },
    /* SIGN_INFO            */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    2,     0   },
    /* SEC_REQ              */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_PUBLIC_KEY      */{ 0,    0,     0,      5,     0,   0,    0,   2,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_DHKEY_CHCK      */{ 0,    5,     0,      0,     0,   0,    0,   0,      0,      0,    0,    2,      1,     2,     0,    0,     0   },
    /* PAIR_KEYPR_NOTIF     */{ 0,    9,     0,      0,     0,   0,    0,   0,      5,      2,    0,    0,      0,     0,     0,    0,     0   },
    /* PAIR_COMMITM         */{ 0,    8,     0,      0,     0,   0,    0,   0,      6,      1,    0,    0,      0,     0,     0,    0,     0   },
    /* KEY_READY            */{ 0,    3,     0,      3,     2,   2,    1,   0,      4,      0,    0,    0,      0,     0,     2,    1,     0   },
    /* ENC_CMPL             */{ 0,    0,     2,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     3,    0,     0   },
    /* L2C_CONN             */{ 1,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* L2C_DISC             */{ 0,    0x83,  0x83,   0x83,  0x83, 0x83, 0x83, 0x83,   0x83,   0x83, 0x83, 0x83,   0x83,  0x83,  0x83, 0x83,  0   },
    /* IO_RSP               */{ 0,    1,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SEC_GRANT            */{ 0,    2,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* TK_REQ               */{ 0,    0,     0,      2,     0,   0,    0,   0,      3,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* AUTH_CMPL            */{ 0,    0x82,  0x82,   0x82,  0x82, 0x82, 0x82, 0x82,   0x82,   0x82, 0x82, 0x82,   0x82,  0x82,  0x82, 0x82,  0   },
    /* ENC_REQ              */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     1,    0,     0   },
    /* BOND_REQ             */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     4,    0,     0   },
    /* DISCARD_SEC_REQ      */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* PUBL_KEY_EXCH_REQ    */{ 0,    0,     0,      4,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* LOC_PUBL_KEY_CRTD    */{ 0,    0,     0,      0,     0,   0,    0,   1,      0,      0,    0,    0,      0,     0,     0,    0,     1   },
    /* BOTH_PUBL_KEYS_RCVD  */{ 0,    0,     0,      0,     0,   0,    0,   3,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_DHKEY_CMPLT       */{ 0,    0,     0,      0,     0,   0,    0,   0,      1,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* HAVE_LOC_NONCE       */{ 0,    0,     0,      0,     0,   0,    0,   0,      2,      0,    0,    0,      0,     0,     0,    0,     2   },
    /* SC_PHASE1_CMPLT      */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    1,      0,     0,     0,    0,     0   },
    /* SC_CALC_NC           */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    2,    0,      0,     0,     0,    0,     0   },
    /* SC_DSPL_NC           */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    3,    0,      0,     0,     0,    0,     0   },
    /* SC_NC_OK             */{ 0,    6,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_2_DHCK_CHKS_PRES  */{ 0,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      2,     0,     0,    0,     0   },
    /* SC_KEY_READY         */{ 0,    7,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     1,     0,    0,     0   },
    /* KEYPR_NOTIF          */{ 0,    10,    0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* SC_OOB_DATA          */{ 0,    11,    0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
    /* CR_LOC_SC_OOB_DATA   */{ 3,    0,     0,      0,     0,   0,    0,   0,      0,      0,    0,    0,      0,     0,     0,    0,     0   },
};

static const UINT8 smp_slave_idle_table[][SMP_SM_NUM_COLS] = {
    /*                   Event                 Action                Next State */
    /* L2C_CONN */      {SMP_SEND_APP_CBACK,  SMP_SM_NO_ACTION,      SMP_STATE_WAIT_APP_RSP},
    /* PAIR_REQ */      {SMP_PROC_PAIR_CMD,   SMP_SEND_APP_CBACK,     SMP_STATE_WAIT_APP_RSP}
    /* CR_LOC_SC_OOB_DATA   */ , {SMP_CREATE_PRIVATE_KEY, SMP_SM_NO_ACTION, SMP_STATE_CREATE_LOCAL_SEC_CONN_OOB_DATA}
};

static const UINT8 smp_slave_wait_for_app_response_table [][SMP_SM_NUM_COLS] = {
    /*               Event                   Action                 Next State */
    /* IO_RSP    */ {SMP_PROC_IO_RSP,       SMP_FAST_CONN_PARAM, SMP_STATE_PAIR_REQ_RSP},
    /* SEC_GRANT */ {SMP_PROC_SEC_GRANT,    SMP_SEND_APP_CBACK, SMP_STATE_WAIT_APP_RSP},

    /* TK ready */
    /* KEY_READY */ {SMP_PROC_SL_KEY,   SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
    /* CONFIRM   */ {SMP_PROC_CONFIRM,   SMP_SM_NO_ACTION, SMP_STATE_CONFIRM}
    /* DHKey Check from master is received before phase 1 is completed - race */
    /* PAIR_DHKEY_CHCK      */, {SMP_PROCESS_DHKEY_CHECK, SMP_SM_NO_ACTION,  SMP_STATE_WAIT_APP_RSP},
    /* user confirms NC 'OK', i.e. phase 1 is completed */
    /* SC_NC_OK             */ {SMP_MOVE_TO_SEC_CONN_PHASE2, SMP_SM_NO_ACTION,  SMP_STATE_SEC_CONN_PHS2_START},
    /* user-provided passkey is rcvd */
    /* SC_KEY_READY   */ {SMP_START_PASSKEY_VERIFICATION, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
    /* PAIR_COMMITM   */ {SMP_PROCESS_PAIRING_COMMITMENT, SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
    /* PAIR_KEYPR_NOTIF */ {SMP_PROCESS_KEYPRESS_NOTIFICATION, SMP_SEND_APP_CBACK, SMP_STATE_WAIT_APP_RSP},
    /* KEYPR_NOTIF */ {SMP_SEND_KEYPRESS_NOTIFICATION, SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
    /* SC_OOB_DATA          */ {SMP_SEND_PAIR_RSP,    SMP_SM_NO_ACTION,    SMP_STATE_PAIR_REQ_RSP},
};

static const UINT8 smp_slave_sec_request_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* PAIR_REQ */{SMP_PROC_PAIR_CMD,       SMP_SM_NO_ACTION,       SMP_STATE_PAIR_REQ_RSP},
    /* ENCRYPTED*/{SMP_ENC_CMPL,            SMP_SM_NO_ACTION,       SMP_STATE_PAIR_REQ_RSP},
};

static const UINT8 smp_slave_pair_request_response_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* CONFIRM  */ {SMP_PROC_CONFIRM,       SMP_SM_NO_ACTION,   SMP_STATE_CONFIRM},
    /* TK_REQ   */ {SMP_SEND_APP_CBACK,     SMP_SM_NO_ACTION,   SMP_STATE_WAIT_APP_RSP},
    /* TK/Confirm ready */
    /* KEY_READY */{SMP_PROC_SL_KEY,        SMP_SM_NO_ACTION,   SMP_STATE_PAIR_REQ_RSP}
    /* PUBL_KEY_EXCH_REQ    */, { SMP_CREATE_PRIVATE_KEY, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH},
    /* PAIR_PUBLIC_KEY      */ { SMP_PROCESS_PAIR_PUBLIC_KEY, SMP_SM_NO_ACTION,   SMP_STATE_PAIR_REQ_RSP},
};

static const UINT8 smp_slave_wait_confirm_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* CONFIRM  */ {SMP_PROC_CONFIRM,       SMP_SEND_CONFIRM,   SMP_STATE_CONFIRM},
    /* KEY_READY*/ {SMP_PROC_SL_KEY,        SMP_SM_NO_ACTION,   SMP_STATE_WAIT_CONFIRM}
};

static const UINT8 smp_slave_confirm_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* RAND     */ {SMP_PROC_RAND,          SMP_GENERATE_COMPARE,   SMP_STATE_RAND},

    /* TK/Confirm ready */
    /* KEY_READY*/ {SMP_PROC_SL_KEY,        SMP_SM_NO_ACTION,       SMP_STATE_CONFIRM}
};

static const UINT8 smp_slave_rand_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* KEY_READY */ {SMP_PROC_COMPARE,      SMP_SM_NO_ACTION,   SMP_STATE_RAND}, /* compare match */
    /* RAND      */ {SMP_SEND_RAND,         SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING}
};

static const UINT8 smp_slave_public_key_exch_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* LOC_PUBL_KEY_CRTD  */{ SMP_WAIT_FOR_BOTH_PUBLIC_KEYS, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH},
    /* PAIR_PUBLIC_KEY      */{ SMP_PROCESS_PAIR_PUBLIC_KEY, SMP_SM_NO_ACTION, SMP_STATE_PUBLIC_KEY_EXCH},
    /* BOTH_PUBL_KEYS_RCVD */{ SMP_HAVE_BOTH_PUBLIC_KEYS, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
};

static const UINT8 smp_slave_sec_conn_phs1_start_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* SC_DHKEY_CMPLT       */{ SMP_START_SEC_CONN_PHASE1, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
    /* HAVE_LOC_NONCE       */{ SMP_PROCESS_LOCAL_NONCE, SMP_SM_NO_ACTION, SMP_STATE_WAIT_COMMITMENT},
    /* TK_REQ               */{ SMP_SEND_APP_CBACK,      SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
    /* SMP_MODEL_SEC_CONN_PASSKEY_DISP model, passkey is sent up to display, it's time to start */
    /* commitment calculation */
    /* KEY_READY */{ SMP_START_PASSKEY_VERIFICATION, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
    /* PAIR_KEYPR_NOTIF  */{ SMP_PROCESS_KEYPRESS_NOTIFICATION, SMP_SEND_APP_CBACK, SMP_STATE_SEC_CONN_PHS1_START},
    /*COMMIT*/{SMP_PROCESS_PAIRING_COMMITMENT, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS1_START},
};

static const UINT8 smp_slave_wait_commitment_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* PAIR_COMMITM  */{SMP_PROCESS_PAIRING_COMMITMENT, SMP_SEND_COMMITMENT,  SMP_STATE_WAIT_NONCE},
    /* PAIR_KEYPR_NOTIF */{SMP_PROCESS_KEYPRESS_NOTIFICATION, SMP_SEND_APP_CBACK, SMP_STATE_WAIT_COMMITMENT},
};

static const UINT8 smp_slave_wait_nonce_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* peer nonce is received */
    /* RAND           */{SMP_PROC_RAND, SMP_PROCESS_PEER_NONCE, SMP_STATE_SEC_CONN_PHS2_START},
    /* NC model, time to calculate number for NC */
    /* SC_CALC_NC  */{SMP_CALCULATE_NUMERIC_COMPARISON_DISPLAY_NUMBER, SMP_SM_NO_ACTION, SMP_STATE_WAIT_NONCE},
    /* NC model, time to display calculated number for NC to the user */
    /* SC_DSPL_NC   */{SMP_SEND_APP_CBACK, SMP_SM_NO_ACTION, SMP_STATE_WAIT_APP_RSP},
};

static const UINT8 smp_slave_sec_conn_phs2_start_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* SC_PHASE1_CMPLT */{SMP_CALCULATE_LOCAL_DHKEY_CHECK, SMP_PH2_DHKEY_CHECKS_ARE_PRESENT, SMP_STATE_WAIT_DHK_CHECK},
    /* DHKey Check from master is received before slave DHKey calculation is completed - race */
    /* PAIR_DHKEY_CHCK  */{SMP_PROCESS_DHKEY_CHECK, SMP_SM_NO_ACTION, SMP_STATE_SEC_CONN_PHS2_START},
};

static const UINT8 smp_slave_wait_dhk_check_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* PAIR_DHKEY_CHCK      */{SMP_PROCESS_DHKEY_CHECK, SMP_CALCULATE_PEER_DHKEY_CHECK, SMP_STATE_DHK_CHECK},
    /* DHKey Check from master was received before slave came to this state */
    /* SC_2_DHCK_CHKS_PRES  */{SMP_CALCULATE_PEER_DHKEY_CHECK, SMP_SM_NO_ACTION, SMP_STATE_DHK_CHECK},
};

static const UINT8 smp_slave_dhk_check_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */

    /* locally calculated peer dhkey check is ready -> compare it withs DHKey Check */
    /* actually received from peer */
    /* SC_KEY_READY         */{SMP_MATCH_DHKEY_CHECKS, SMP_SM_NO_ACTION, SMP_STATE_DHK_CHECK},

    /* dhkey checks match -> send local dhkey check to master, go to wait for HCI LE */
    /* Long Term Key Request Event */
    /* PAIR_DHKEY_CHCK      */{SMP_SEND_DHKEY_CHECK, SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},
};

static const UINT8 smp_slave_enc_pending_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* ENC_REQ   */ {SMP_GENERATE_STK,      SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},

    /* STK ready */
    /* KEY_READY */ {SMP_SEND_LTK_REPLY,    SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},
    /* ENCRYPTED */ {SMP_CHECK_AUTH_REQ,    SMP_SM_NO_ACTION, SMP_STATE_ENCRYPTION_PENDING},
    /* BOND_REQ  */ {SMP_KEY_DISTRIBUTE,    SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING}
};
static const UINT8 smp_slave_bond_pending_table[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */

    /* LTK ready */
    /* KEY_READY */{ SMP_SEND_ENC_INFO,     SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},

    /* rev SRK */
    /* SIGN_INFO */{ SMP_PROC_SRK_INFO,     SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* ENC_INFO */ { SMP_PROC_ENC_INFO,     SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* ID_INFO  */ { SMP_PROC_ID_INFO,      SMP_SM_NO_ACTION,  SMP_STATE_BOND_PENDING},
    /* MASTER_ID*/ { SMP_PROC_MASTER_ID,    SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING},
    /* ID_ADDR  */ { SMP_PROC_ID_ADDR,      SMP_SM_NO_ACTION, SMP_STATE_BOND_PENDING}

};

static const UINT8 smp_slave_create_local_sec_conn_oob_data[][SMP_SM_NUM_COLS] = {
    /*                          Event                  Action                 Next State */
    /* LOC_PUBL_KEY_CRTD */ {SMP_SET_LOCAL_OOB_KEYS, SMP_SM_NO_ACTION, SMP_STATE_CREATE_LOCAL_SEC_CONN_OOB_DATA},
    /* HAVE_LOC_NONCE    */ {SMP_SET_LOCAL_OOB_RAND_COMMITMENT, SMP_SM_NO_ACTION, SMP_STATE_IDLE}
};

static const tSMP_SM_TBL smp_state_table[][2] = {
    /* SMP_STATE_IDLE */
    {smp_master_idle_table, smp_slave_idle_table},

    /* SMP_STATE_WAIT_APP_RSP */
    {smp_master_wait_for_app_response_table, smp_slave_wait_for_app_response_table},

    /* SMP_STATE_SEC_REQ_PENDING */
    {NULL, smp_slave_sec_request_table},

    /* SMP_STATE_PAIR_REQ_RSP */
    {smp_master_pair_request_response_table, smp_slave_pair_request_response_table},

    /* SMP_STATE_WAIT_CONFIRM */
    {smp_master_wait_for_confirm_table, smp_slave_wait_confirm_table},

    /* SMP_STATE_CONFIRM */
    {smp_master_confirm_table, smp_slave_confirm_table},

    /* SMP_STATE_RAND */
    {smp_master_rand_table, smp_slave_rand_table},

    /* SMP_STATE_PUBLIC_KEY_EXCH */
    {smp_master_public_key_exchange_table, smp_slave_public_key_exch_table},

    /* SMP_STATE_SEC_CONN_PHS1_START */
    {smp_master_sec_conn_phs1_start_table, smp_slave_sec_conn_phs1_start_table},

    /* SMP_STATE_WAIT_COMMITMENT */
    {smp_master_wait_commitment_table, smp_slave_wait_commitment_table},

    /* SMP_STATE_WAIT_NONCE */
    {smp_master_wait_nonce_table, smp_slave_wait_nonce_table},

    /* SMP_STATE_SEC_CONN_PHS2_START */
    {smp_master_sec_conn_phs2_start_table, smp_slave_sec_conn_phs2_start_table},

    /* SMP_STATE_WAIT_DHK_CHECK */
    {smp_master_wait_dhk_check_table, smp_slave_wait_dhk_check_table},

    /* SMP_STATE_DHK_CHECK */
    {smp_master_dhk_check_table, smp_slave_dhk_check_table},

    /* SMP_STATE_ENCRYPTION_PENDING */
    {smp_master_enc_pending_table, smp_slave_enc_pending_table},

    /* SMP_STATE_BOND_PENDING */
    {smp_master_bond_pending_table, smp_slave_bond_pending_table},

    /* SMP_STATE_CREATE_LOCAL_SEC_CONN_OOB_DATA */
    {smp_master_create_local_sec_conn_oob_data, smp_slave_create_local_sec_conn_oob_data}
};

typedef const UINT8 (*tSMP_ENTRY_TBL)[SMP_STATE_MAX];
static const tSMP_ENTRY_TBL smp_entry_table[] = {
    smp_master_entry_map,
    smp_slave_entry_map
};

#if SMP_DYNAMIC_MEMORY == FALSE
tSMP_CB  smp_cb;
#else
tSMP_CB  *smp_cb_ptr;
#endif
#define SMP_ALL_TBL_MASK        0x80

/*******************************************************************************
** Function     smp_set_state
** Returns      None
*******************************************************************************/
void smp_set_state(tSMP_STATE state)
{
    if (state < SMP_STATE_MAX) {
        SMP_TRACE_DEBUG( "State change: %s(%d) ==> %s(%d)",
                         smp_get_state_name(smp_cb.state), smp_cb.state,
                         smp_get_state_name(state), state );
        smp_cb.state = state;
    } else {
        SMP_TRACE_DEBUG("smp_set_state invalid state =%d", state );
    }
}

/*******************************************************************************
** Function     smp_get_state
** Returns      The smp state
*******************************************************************************/
tSMP_STATE smp_get_state(void)
{
    return smp_cb.state;
}

/*******************************************************************************
**
** Function     smp_sm_event
**
** Description  Handle events to the state machine. It looks up the entry
**              in the smp_entry_table array.
**              If it is a valid entry, it gets the state table.Set the next state,
**              if not NULL state.Execute the action function according to the
**              state table. If the state returned by action function is not NULL
**              state, adjust the new state to the returned state.If (api_evt != MAX),
**              call callback function.
**
** Returns      void.
**
*******************************************************************************/
void smp_sm_event(tSMP_CB *p_cb, tSMP_EVENT event, void *p_data)
{
    UINT8           curr_state = p_cb->state;
    tSMP_SM_TBL     state_table;
    UINT8           action, entry, i;
    tSMP_ENTRY_TBL  entry_table =  smp_entry_table[p_cb->role];

    SMP_TRACE_EVENT("main smp_sm_event\n");
    if (curr_state >= SMP_STATE_MAX) {
        SMP_TRACE_DEBUG( "Invalid state: %d\n", curr_state) ;
        return;
    }

    SMP_TRACE_DEBUG( "SMP Role: %s State: [%s (%d)], Event: [%s (%d)]", \
                     (p_cb->role == 0x01) ? "Slave" : "Master\n", smp_get_state_name( p_cb->state),
                     p_cb->state, smp_get_event_name(event), event) ;

    /* look up the state table for the current state */
    /* lookup entry /w event & curr_state */
    /* If entry is ignore, return.
     * Otherwise, get state table (according to curr_state or all_state) */
    if ((event <= SMP_MAX_EVT) && ( (entry = entry_table[event - 1][curr_state]) != SMP_SM_IGNORE )) {
        if (entry & SMP_ALL_TBL_MASK) {
            entry &= ~SMP_ALL_TBL_MASK;
            state_table = smp_all_table;
        } else {
            state_table = smp_state_table[curr_state][p_cb->role ? 1 : 0];
        }
    } else {
        SMP_TRACE_DEBUG( "Ignore event [%s (%d)] in state [%s (%d)]\n",
                         smp_get_event_name(event), event, smp_get_state_name(curr_state),
                         curr_state);
        return;
    }

    /* Get possible next state from state table. */

    smp_set_state(state_table[entry - 1][SMP_SME_NEXT_STATE]);

    /* If action is not ignore, clear param, exec action and get next state.
     * The action function may set the Param for cback.
     * Depending on param, call cback or free buffer. */
    /* execute action */
    /* execute action functions */
    for (i = 0; i < SMP_NUM_ACTIONS; i++) {
        if ((action = state_table[entry - 1][i]) != SMP_SM_NO_ACTION && smp_sm_action[action] != NULL) {
            (*smp_sm_action[action])(p_cb, (tSMP_INT_DATA *)p_data);
        } else {
            break;
        }
    }
    SMP_TRACE_DEBUG( "result state = %s\n", smp_get_state_name( p_cb->state ) ) ;
}

/*******************************************************************************
** Function     smp_get_state_name
** Returns      The smp state name.
*******************************************************************************/
const char *smp_get_state_name(tSMP_STATE state)
{
    const char *p_str = smp_state_name[SMP_STATE_MAX];

    if (state < SMP_STATE_MAX) {
        p_str = smp_state_name[state];
    }
    return p_str;
}

/*******************************************************************************
** Function     smp_get_event_name
** Returns      The smp event name.
*******************************************************************************/
const char *smp_get_event_name(tSMP_EVENT event)
{
    const char *p_str = smp_event_name[SMP_MAX_EVT];

    if (event <= SMP_MAX_EVT) {
        p_str = smp_event_name[event - 1];
    }
    return p_str;
}

#endif