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|
/******************************************************************************
*
* 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 "bt_target.h"
#if SMP_INCLUDED == TRUE
#include <string.h>
#include "smp_int.h"
const char * const smp_state_name [] =
{
"SMP_ST_IDLE",
"SMP_ST_WAIT_APP_RSP",
"SMP_ST_SEC_REQ_PENDING",
"SMP_ST_PAIR_REQ_RSP",
"SMP_ST_WAIT_CONFIRM",
"SMP_ST_CONFIRM",
"SMP_ST_RAND",
"SMP_ST_ENC_PENDING",
"SMP_ST_BOND_PENDING",
"SMP_ST_RELEASE_DELAY",
"SMP_ST_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",
"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",
"RELEASE_DELAY_EVT",
"RELEASE_DELAY_TOUT_EVT",
"MAX_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_INIT,
SMP_SEND_SECU_INFO,
SMP_SEND_ID_INFO,
SMP_SEND_LTK_REPLY,
SMP_PROC_PAIR_CMD,
SMP_PROC_PAIR_FAIL,
SMP_PROC_CONFIRM,
SMP_PROC_INIT,
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_PROC_REL_DELAY,
SMP_PROC_REL_DELAY_TOUT,
SMP_SM_NO_ACTION
};
static const tSMP_ACT smp_sm_action[] =
{
smp_proc_sec_req,
smp_send_pair_req,
smp_send_pair_rsp,
smp_send_confirm,
smp_send_pair_fail,
smp_send_init,
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_init,
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_distribution,
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_proc_release_delay,
smp_proc_release_delay_tout,
};
/************ SMP Master FSM State/Event Indirection Table **************/
static const UINT8 smp_ma_entry_map[][SMP_ST_MAX] =
{
/* state name: Idle WaitApp SecReq Pair Wait Confirm Init Enc Bond Rel
Rsp Pend ReqRsp Cfm Pend Pend Delay */
/* PAIR_REQ */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* PAIR_RSP */{ 0, 0, 0, 1, 0, 0, 0, 0, 0, 0 },
/* CONFIRM */{ 0, 0, 0, 0, 0, 1, 0, 0, 0, 0 },
/* INIT */{ 0, 0, 0, 0, 0, 0, 1, 0, 0, 0 },
/* PAIR_FAIL */{ 0, 0x81, 0, 0x81, 0x81,0x81, 0x81,0, 0, 0 },
/* ENC_INFO */{ 0, 0, 0, 0, 0, 0, 0, 0, 1, 0 },
/* MASTER_ID */{ 0, 0, 0, 0, 0, 0, 0, 0, 4, 0 },
/* ID_INFO */{ 0, 0, 0, 0, 0, 0, 0, 0, 2, 0 },
/* ID_ADDR */{ 0, 0, 0, 0, 0, 0, 0, 0, 5, 0 },
/* SIGN_INFO */{ 0, 0, 0, 0, 0, 0, 0, 0, 3, 0 },
/* SEC_REQ */{ 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* KEY_READY */{ 0, 3, 0, 3, 1, 0, 2, 1, 6, 0 },
/* ENC_CMPL */{ 0, 0, 0, 0, 0, 0, 0, 2, 0, 0 },
/* L2C_CONN */{ 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* L2C_DISC */{ 0, 0x83, 0, 0x83, 0x83,0x83, 0x83,0x83, 0x83, 2 },
/* IO_RSP */{ 0, 2, 0, 0, 0, 0, 0, 0, 0, 0 },
/* SEC_GRANT */{ 0, 1, 0, 0, 0, 0, 0, 0, 0, 0 },
/* TK_REQ */{ 0, 0, 0, 2, 0, 0, 0, 0, 0, 0 },
/* AUTH_CMPL */{ 0, 0x82, 0, 0x82, 0x82,0x82, 0x82,0x82, 0x82, 0 },
/* ENC_REQ */{ 0, 4, 0, 0, 0, 0, 3, 0, 0, 0 },
/* BOND_REQ */{ 0, 0, 0, 0, 0, 0, 0, 3, 0, 0 },
/* DISCARD_SEC_REQ */{ 0, 5, 0, 0, 0, 0, 0, 3, 0, 0 },
/* RELEASE_DELAY */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
/* RELEASE_DELAY_TOUT */{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 },
};
static const UINT8 smp_all_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* PAIR_FAIL */ {SMP_PROC_PAIR_FAIL, SMP_PROC_REL_DELAY_TOUT, SMP_ST_IDLE},
/* AUTH_CMPL */ {SMP_SEND_PAIR_FAIL, SMP_PAIRING_CMPL, SMP_ST_RELEASE_DELAY},
/* L2C_DISC */ {SMP_PAIR_TERMINATE, SMP_SM_NO_ACTION, SMP_ST_IDLE}
};
static const UINT8 smp_ma_idle_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* L2C_CONN */ {SMP_SEND_APP_CBACK, SMP_SM_NO_ACTION, SMP_ST_WAIT_APP_RSP},
/* SEC_REQ */ {SMP_PROC_SEC_REQ, SMP_SEND_APP_CBACK, SMP_ST_WAIT_APP_RSP}
};
static const UINT8 smp_ma_wait_app_rsp_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* SEC_GRANT */ { SMP_PROC_SEC_GRANT, SMP_SEND_APP_CBACK, SMP_ST_WAIT_APP_RSP},
/* IO_RSP */ { SMP_SEND_PAIR_REQ, SMP_SM_NO_ACTION, SMP_ST_PAIR_REQ_RSP},
/* KEY_READY */ { SMP_GENERATE_CONFIRM, SMP_SM_NO_ACTION, SMP_ST_WAIT_CONFIRM},/* TK ready */
/* ENC_REQ */ { SMP_START_ENC, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING},/* start enc mode setup */
/* DISCARD_SEC_REQ */ { SMP_PROC_DISCARD, SMP_SM_NO_ACTION, SMP_ST_IDLE}
};
static const UINT8 smp_ma_pair_req_rsp_table [][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* PAIR_RSP */ { SMP_PROC_PAIR_CMD, SMP_DECIDE_ASSO_MODEL, SMP_ST_PAIR_REQ_RSP},
/* TK_REQ */ { SMP_SEND_APP_CBACK, SMP_SM_NO_ACTION, SMP_ST_WAIT_APP_RSP},
/* KEY_READY */{ SMP_GENERATE_CONFIRM, SMP_SM_NO_ACTION, SMP_ST_WAIT_CONFIRM} /* TK ready */
};
static const UINT8 smp_ma_wait_confirm_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* KEY_READY*/ {SMP_SEND_CONFIRM, SMP_SM_NO_ACTION, SMP_ST_CONFIRM}/* CONFIRM ready */
};
static const UINT8 smp_ma_confirm_table [][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* CONFIRM */ { SMP_PROC_CONFIRM, SMP_SEND_INIT, SMP_ST_RAND}
};
static const UINT8 smp_ma_init_table [][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* INIT */ { SMP_PROC_INIT, SMP_GENERATE_COMPARE, SMP_ST_RAND},
/* KEY_READY*/ { SMP_PROC_COMPARE, SMP_SM_NO_ACTION, SMP_ST_RAND}, /* Compare ready */
/* ENC_REQ */ { SMP_GENERATE_STK, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING}
};
static const UINT8 smp_ma_enc_pending_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* KEY_READY */ { SMP_START_ENC, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING}, /* STK ready */
/* ENCRYPTED */ { SMP_CHECK_AUTH_REQ, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING},
/* BOND_REQ */ { SMP_KEY_DISTRIBUTE, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING}
};
static const UINT8 smp_ma_bond_pending_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* ENC_INFO */ { SMP_PROC_ENC_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* ID_INFO */ { SMP_PROC_ID_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* SIGN_INFO*/ { SMP_PROC_SRK_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* MASTER_ID*/ { SMP_PROC_MASTER_ID, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* ID_ADDR */ { SMP_PROC_ID_ADDR, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* KEY_READY */ {SMP_SEND_SECU_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING} /* LTK ready */
};
static const UINT8 smp_ma_rel_delay_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* RELEASE_DELAY*/ {SMP_PROC_REL_DELAY, SMP_SM_NO_ACTION, SMP_ST_RELEASE_DELAY},
/* RELEASE_DELAY_TOUT*/ {SMP_PROC_REL_DELAY_TOUT, SMP_SM_NO_ACTION, SMP_ST_IDLE}
};
/************ SMP Slave FSM State/Event Indirection Table **************/
static const UINT8 smp_sl_entry_map[][SMP_ST_MAX] =
{
/* state name: Idle Wait SecReq Pair Wait Confirm Init Enc Bond Rel
AppRsp Pend ReqRsp Cfm Pend Pend Delay */
/* PAIR_REQ */ { 2, 0, 1, 0, 0, 0, 0, 0, 0, 0 },
/* PAIR_RSP */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* CONFIRM */ { 0, 4, 0, 1, 1, 0, 0, 0, 0, 0 },
/* INIT */ { 0, 0, 0, 0, 0, 1, 2, 0, 0, 0 },
/* PAIR_FAIL*/ { 0, 0x81, 0x81, 0x81, 0x81,0x81, 0x81,0x81, 0, 0 },
/* ENC_INFO */ { 0, 0, 0, 0, 0, 0, 0, 0, 3, 0 },
/* MASTER_ID*/ { 0, 0, 0, 0, 0, 0, 0, 0, 5, 0 },
/* ID_INFO */ { 0, 0, 0, 0, 0, 0, 0, 0, 4, 0 },
/* ID_ADDR */ { 0, 0, 0, 0, 0, 0, 0, 0, 6, 0 },
/* SIGN_INFO*/ { 0, 0, 0, 0, 0, 0, 0, 0, 2, 0 },
/* SEC_REQ */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* KEY_READY*/ { 0, 3, 0, 3, 2, 2, 1, 2, 1, 0 },
/* ENC_CMPL */ { 0, 0, 2, 0, 0, 0, 0, 3, 0, 0 },
/* L2C_CONN */ { 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* L2C_DISC */ { 0, 0x83, 0x83, 0x83, 0x83,0x83, 0x83,0x83, 0x83, 2 },
/* IO_RSP */ { 0, 1, 0, 0, 0, 0, 0, 0, 0, 0 },
/* SEC_GRANT*/ { 0, 2, 0, 0, 0, 0, 0, 0, 0, 0 },
/* TK_REQ */ { 0, 0, 0, 2, 0, 0, 0, 0, 0, 0 },
/* AUTH_CMPL*/ { 0, 0x82, 0x82, 0x82, 0x82,0x82, 0x82,0x82, 0x82, 0 },
/* ENC_REQ */ { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0 },
/* BOND_REQ */ { 0, 0, 0, 0, 0, 0, 0, 4, 0, 0 },
/* DISCARD_SEC_REQ */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 },
/* RELEASE_DELAY */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 },
/* RELEASE_DELAY_TOUT */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 },
};
static const UINT8 smp_sl_idle_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* L2C_CONN */ {SMP_SEND_APP_CBACK, SMP_SM_NO_ACTION, SMP_ST_WAIT_APP_RSP},
/* PAIR_REQ */ {SMP_PROC_PAIR_CMD, SMP_SEND_APP_CBACK, SMP_ST_WAIT_APP_RSP}
};
static const UINT8 smp_sl_wait_app_rsp_table [][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* IO_RSP */ {SMP_PROC_IO_RSP, SMP_SM_NO_ACTION, SMP_ST_PAIR_REQ_RSP},
/* SEC_GRANT */ {SMP_PROC_SEC_GRANT, SMP_SEND_APP_CBACK, SMP_ST_WAIT_APP_RSP},
/* KEY_READY */ {SMP_PROC_SL_KEY, SMP_SM_NO_ACTION, SMP_ST_WAIT_APP_RSP},/* TK ready */
/* CONFIRM */ {SMP_PROC_CONFIRM, SMP_SM_NO_ACTION, SMP_ST_CONFIRM}
};
static const UINT8 smp_sl_sec_request_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* PAIR_REQ */{SMP_PROC_PAIR_CMD, SMP_SEND_PAIR_RSP, SMP_ST_PAIR_REQ_RSP},
/* ENCRYPTED*/{SMP_ENC_CMPL, SMP_SM_NO_ACTION, SMP_ST_PAIR_REQ_RSP},
};
static const UINT8 smp_sl_pair_req_rsp_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* CONFIRM */ {SMP_PROC_CONFIRM, SMP_SM_NO_ACTION, SMP_ST_CONFIRM},
/* TK_REQ */ {SMP_SEND_APP_CBACK, SMP_SM_NO_ACTION, SMP_ST_WAIT_APP_RSP},
/* KEY_READY */{SMP_PROC_SL_KEY, SMP_SM_NO_ACTION, SMP_ST_PAIR_REQ_RSP} /* TK/Confirm ready */
};
static const UINT8 smp_sl_wait_confirm_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* CONFIRM */ {SMP_PROC_CONFIRM, SMP_SEND_CONFIRM, SMP_ST_CONFIRM},
/* KEY_READY*/ {SMP_PROC_SL_KEY, SMP_SM_NO_ACTION, SMP_ST_WAIT_CONFIRM}
};
static const UINT8 smp_sl_confirm_table [][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* INIT_EVT */{ SMP_PROC_INIT, SMP_GENERATE_COMPARE, SMP_ST_RAND},
/* KEY_READY*/ {SMP_PROC_SL_KEY, SMP_SM_NO_ACTION, SMP_ST_CONFIRM} /* TK/Confirm ready */
};
static const UINT8 smp_sl_init_table [][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* KEY_READY */ {SMP_PROC_COMPARE, SMP_SM_NO_ACTION, SMP_ST_RAND}, /* compare match */
/* INIT_EVT */ {SMP_SEND_INIT, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING}
};
static const UINT8 smp_sl_enc_pending_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* ENC_REQ */ {SMP_GENERATE_STK, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING},
/* KEY_READY */ {SMP_SEND_LTK_REPLY, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING},/* STK ready */
/* ENCRYPTED */ {SMP_CHECK_AUTH_REQ, SMP_SM_NO_ACTION, SMP_ST_ENC_PENDING},
/* BOND_REQ */ {SMP_KEY_DISTRIBUTE, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING}
};
static const UINT8 smp_sl_bond_pending_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* KEY_READY */ {SMP_SEND_SECU_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING}, /* LTK ready */
/* SIGN_INFO */ {SMP_PROC_SRK_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING}, /* rev SRK */
/* ENC_INFO */ { SMP_PROC_ENC_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* ID_INFO */ { SMP_PROC_ID_INFO, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* MASTER_ID*/ { SMP_PROC_MASTER_ID, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING},
/* ID_ADDR */ { SMP_PROC_ID_ADDR, SMP_SM_NO_ACTION, SMP_ST_BOND_PENDING}
};
static const UINT8 smp_sl_rel_delay_table[][SMP_SM_NUM_COLS] = {
/* Event Action Next State */
/* RELEASE_DELAY*/ {SMP_PROC_REL_DELAY, SMP_SM_NO_ACTION, SMP_ST_RELEASE_DELAY},
/* RELEASE_DELAY_TOUT*/ {SMP_PROC_REL_DELAY_TOUT, SMP_SM_NO_ACTION, SMP_ST_IDLE}
};
static const tSMP_SM_TBL smp_state_table[][2] = {
{smp_ma_idle_table, smp_sl_idle_table}, /* SMP_ST_IDLE*/
{smp_ma_wait_app_rsp_table, smp_sl_wait_app_rsp_table}, /* SMP_ST_WAIT_APP_RSP */
{NULL, smp_sl_sec_request_table}, /* SMP_ST_SEC_REQ_PENDING */
{smp_ma_pair_req_rsp_table, smp_sl_pair_req_rsp_table}, /* SMP_ST_PAIR_REQ_RSP */
{smp_ma_wait_confirm_table, smp_sl_wait_confirm_table}, /* SMP_ST_WAIT_CONFIRM */
{smp_ma_confirm_table, smp_sl_confirm_table}, /* SMP_ST_CONFIRM */
{smp_ma_init_table, smp_sl_init_table}, /* SMP_ST_RAND */
{smp_ma_enc_pending_table, smp_sl_enc_pending_table}, /* SMP_ST_ENC_PENDING */
{smp_ma_bond_pending_table, smp_sl_bond_pending_table}, /* SMP_ST_BOND_PENDING */
{smp_ma_rel_delay_table, smp_sl_rel_delay_table} /* SMP_ST_RELEASE_DELAY */
};
typedef const UINT8 (*tSMP_ENTRY_TBL)[SMP_ST_MAX];
static const tSMP_ENTRY_TBL smp_entry_table[] ={
smp_ma_entry_map,
smp_sl_entry_map
};
#if SMP_DYNAMIC_MEMORY == FALSE
tSMP_CB smp_cb;
#endif
#define SMP_ALL_TBL_MASK 0x80
/*******************************************************************************
** Function smp_set_state
** Returns None
*******************************************************************************/
void smp_set_state(tSMP_STATE state)
{
if (state < SMP_ST_MAX)
{
SMP_TRACE_DEBUG4( "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_DEBUG1("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_EVENT0("main smp_sm_event");
if (curr_state >= SMP_ST_MAX)
{
SMP_TRACE_DEBUG1( "Invalid state: %d", curr_state) ;
return;
}
SMP_TRACE_DEBUG5( "SMP Role: %s State: [%s (%d)], Event: [%s (%d)]",\
(p_cb->role == 0x01) ?"Slave" : "Master", 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 ( (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];
}
else
{
SMP_TRACE_DEBUG4( "Ignore event [%s (%d)] in state [%s (%d)]",
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])(p_cb, (tSMP_INT_DATA *)p_data);
}
else
{
break;
}
}
SMP_TRACE_DEBUG1( "result state = %s", 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_ST_MAX];
if (state < SMP_ST_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 - 1];
if (event < SMP_MAX_EVT)
{
p_str = smp_event_name[event- 1];
}
return p_str;
}
#endif
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