/******************************************************************************
*
* Copyright 2014-2015 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"
#include <string.h>
#include "log/log.h"
#include "smp_int.h"
const char* const smp_br_state_name[SMP_BR_STATE_MAX + 1] = {
"SMP_BR_STATE_IDLE", "SMP_BR_STATE_WAIT_APP_RSP",
"SMP_BR_STATE_PAIR_REQ_RSP", "SMP_BR_STATE_BOND_PENDING",
"SMP_BR_STATE_OUT_OF_RANGE"};
const char* const smp_br_event_name[SMP_BR_MAX_EVT] = {
"BR_PAIRING_REQ_EVT", "BR_PAIRING_RSP_EVT",
"BR_CONFIRM_EVT", "BR_RAND_EVT",
"BR_PAIRING_FAILED_EVT", "BR_ENCRPTION_INFO_EVT",
"BR_MASTER_ID_EVT", "BR_ID_INFO_EVT",
"BR_ID_ADDR_EVT", "BR_SIGN_INFO_EVT",
"BR_SECURITY_REQ_EVT", "BR_PAIR_PUBLIC_KEY_EVT",
"BR_PAIR_DHKEY_CHCK_EVT", "BR_PAIR_KEYPR_NOTIF_EVT",
"BR_KEY_READY_EVT", "BR_ENCRYPTED_EVT",
"BR_L2CAP_CONN_EVT", "BR_L2CAP_DISCONN_EVT",
"BR_KEYS_RSP_EVT", "BR_API_SEC_GRANT_EVT",
"BR_TK_REQ_EVT", "BR_AUTH_CMPL_EVT",
"BR_ENC_REQ_EVT", "BR_BOND_REQ_EVT",
"BR_DISCARD_SEC_REQ_EVT", "BR_OUT_OF_RANGE_EVT"};
const char* smp_get_br_event_name(tSMP_BR_EVENT event);
const char* smp_get_br_state_name(tSMP_BR_STATE state);
#define SMP_BR_SM_IGNORE 0
#define SMP_BR_NUM_ACTIONS 2
#define SMP_BR_SME_NEXT_STATE 2
#define SMP_BR_SM_NUM_COLS 3
typedef const uint8_t (*tSMP_BR_SM_TBL)[SMP_BR_SM_NUM_COLS];
enum {
SMP_SEND_PAIR_REQ,
SMP_BR_SEND_PAIR_RSP,
SMP_SEND_PAIR_FAIL,
SMP_SEND_ID_INFO,
SMP_BR_PROC_PAIR_CMD,
SMP_PROC_PAIR_FAIL,
SMP_PROC_ID_INFO,
SMP_PROC_ID_ADDR,
SMP_PROC_SRK_INFO,
SMP_BR_PROC_SEC_GRANT,
SMP_BR_PROC_SL_KEYS_RSP,
SMP_BR_KEY_DISTRIBUTION,
SMP_BR_PAIRING_COMPLETE,
SMP_SEND_APP_CBACK,
SMP_BR_CHECK_AUTH_REQ,
SMP_PAIR_TERMINATE,
SMP_IDLE_TERMINATE,
SMP_BR_SM_NO_ACTION
};
static const tSMP_ACT smp_br_sm_action[] = {
smp_send_pair_req, /* SMP_SEND_PAIR_REQ */
smp_br_send_pair_response, /* SMP_BR_SEND_PAIR_RSP */
smp_send_pair_fail, /* SMP_SEND_PAIR_FAIL */
smp_send_id_info, /* SMP_SEND_ID_INFO */
smp_br_process_pairing_command, /* SMP_BR_PROC_PAIR_CMD */
smp_proc_pair_fail, /* SMP_PROC_PAIR_FAIL */
smp_proc_id_info, /* SMP_PROC_ID_INFO */
smp_proc_id_addr, /* SMP_PROC_ID_ADDR */
smp_proc_srk_info, /* SMP_PROC_SRK_INFO */
smp_br_process_security_grant, /* SMP_BR_PROC_SEC_GRANT */
smp_br_process_slave_keys_response, /* SMP_BR_PROC_SL_KEYS_RSP */
smp_br_select_next_key, /* SMP_BR_KEY_DISTRIBUTION */
smp_br_pairing_complete, /* SMP_BR_PAIRING_COMPLETE */
smp_send_app_cback, /* SMP_SEND_APP_CBACK */
smp_br_check_authorization_request, /* SMP_BR_CHECK_AUTH_REQ */
smp_pair_terminate, /* SMP_PAIR_TERMINATE */
smp_idle_terminate /* SMP_IDLE_TERMINATE */
};
static const uint8_t smp_br_all_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_PAIRING_FAILED */
{SMP_PROC_PAIR_FAIL, SMP_BR_PAIRING_COMPLETE, SMP_BR_STATE_IDLE},
/* BR_AUTH_CMPL */
{SMP_SEND_PAIR_FAIL, SMP_BR_PAIRING_COMPLETE, SMP_BR_STATE_IDLE},
/* BR_L2CAP_DISCONN */
{SMP_PAIR_TERMINATE, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_IDLE}};
/************ SMP Master FSM State/Event Indirection Table **************/
static const uint8_t smp_br_master_entry_map[][SMP_BR_STATE_MAX] = {
/* br_state name: Idle WaitApp Pair Bond
Rsp ReqRsp Pend */
/* BR_PAIRING_REQ */ {0, 0, 0, 0},
/* BR_PAIRING_RSP */ {0, 0, 1, 0},
/* BR_CONFIRM */ {0, 0, 0, 0},
/* BR_RAND */ {0, 0, 0, 0},
/* BR_PAIRING_FAILED */ {0, 0x81, 0x81, 0},
/* BR_ENCRPTION_INFO */ {0, 0, 0, 0},
/* BR_MASTER_ID */ {0, 0, 0, 0},
/* BR_ID_INFO */ {0, 0, 0, 1},
/* BR_ID_ADDR */ {0, 0, 0, 2},
/* BR_SIGN_INFO */ {0, 0, 0, 3},
/* BR_SECURITY_REQ */ {0, 0, 0, 0},
/* BR_PAIR_PUBLIC_KEY_EVT */ {0, 0, 0, 0},
/* BR_PAIR_DHKEY_CHCK_EVT */ {0, 0, 0, 0},
/* BR_PAIR_KEYPR_NOTIF_EVT */ {0, 0, 0, 0},
/* BR_KEY_READY */ {0, 0, 0, 0},
/* BR_ENCRYPTED */ {0, 0, 0, 0},
/* BR_L2CAP_CONN */ {1, 0, 0, 0},
/* BR_L2CAP_DISCONN */ {2, 0x83, 0x83, 0x83},
/* BR_KEYS_RSP */ {0, 1, 0, 0},
/* BR_API_SEC_GRANT */ {0, 0, 0, 0},
/* BR_TK_REQ */ {0, 0, 0, 0},
/* BR_AUTH_CMPL */ {0, 0x82, 0x82, 0x82},
/* BR_ENC_REQ */ {0, 0, 0, 0},
/* BR_BOND_REQ */ {0, 0, 2, 0},
/* BR_DISCARD_SEC_REQ */ {0, 0, 0, 0}};
static const uint8_t smp_br_master_idle_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_L2CAP_CONN */
{SMP_SEND_APP_CBACK, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_WAIT_APP_RSP},
/* BR_L2CAP_DISCONN */
{SMP_IDLE_TERMINATE, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_IDLE}};
static const uint8_t
smp_br_master_wait_appln_response_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_KEYS_RSP */
{SMP_SEND_PAIR_REQ, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_PAIR_REQ_RSP}};
static const uint8_t
smp_br_master_pair_request_response_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_PAIRING_RSP */
{SMP_BR_PROC_PAIR_CMD, SMP_BR_CHECK_AUTH_REQ,
SMP_BR_STATE_PAIR_REQ_RSP},
/* BR_BOND_REQ */
{SMP_BR_SM_NO_ACTION, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING}};
static const uint8_t smp_br_master_bond_pending_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_ID_INFO */
{SMP_PROC_ID_INFO, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING},
/* BR_ID_ADDR */
{SMP_PROC_ID_ADDR, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING},
/* BR_SIGN_INFO */
{SMP_PROC_SRK_INFO, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING}};
static const uint8_t smp_br_slave_entry_map[][SMP_BR_STATE_MAX] = {
/* br_state name: Idle WaitApp Pair Bond
Rsp ReqRsp Pend */
/* BR_PAIRING_REQ */ {1, 0, 0, 0},
/* BR_PAIRING_RSP */ {0, 0, 0, 0},
/* BR_CONFIRM */ {0, 0, 0, 0},
/* BR_RAND */ {0, 0, 0, 0},
/* BR_PAIRING_FAILED */ {0, 0x81, 0x81, 0x81},
/* BR_ENCRPTION_INFO */ {0, 0, 0, 0},
/* BR_MASTER_ID */ {0, 0, 0, 0},
/* BR_ID_INFO */ {0, 0, 0, 1},
/* BR_ID_ADDR */ {0, 0, 0, 2},
/* BR_SIGN_INFO */ {0, 0, 0, 3},
/* BR_SECURITY_REQ */ {0, 0, 0, 0},
/* BR_PAIR_PUBLIC_KEY_EVT */ {0, 0, 0, 0},
/* BR_PAIR_DHKEY_CHCK_EVT */ {0, 0, 0, 0},
/* BR_PAIR_KEYPR_NOTIF_EVT */ {0, 0, 0, 0},
/* BR_KEY_READY */ {0, 0, 0, 0},
/* BR_ENCRYPTED */ {0, 0, 0, 0},
/* BR_L2CAP_CONN */ {0, 0, 0, 0},
/* BR_L2CAP_DISCONN */ {0, 0x83, 0x83, 0x83},
/* BR_KEYS_RSP */ {0, 2, 0, 0},
/* BR_API_SEC_GRANT */ {0, 1, 0, 0},
/* BR_TK_REQ */ {0, 0, 0, 0},
/* BR_AUTH_CMPL */ {0, 0x82, 0x82, 0x82},
/* BR_ENC_REQ */ {0, 0, 0, 0},
/* BR_BOND_REQ */ {0, 3, 0, 0},
/* BR_DISCARD_SEC_REQ */ {0, 0, 0, 0}};
static const uint8_t smp_br_slave_idle_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_PAIRING_REQ */
{SMP_BR_PROC_PAIR_CMD, SMP_SEND_APP_CBACK, SMP_BR_STATE_WAIT_APP_RSP}};
static const uint8_t
smp_br_slave_wait_appln_response_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_API_SEC_GRANT */
{SMP_BR_PROC_SEC_GRANT, SMP_SEND_APP_CBACK, SMP_BR_STATE_WAIT_APP_RSP},
/* BR_KEYS_RSP */
{SMP_BR_PROC_SL_KEYS_RSP, SMP_BR_CHECK_AUTH_REQ,
SMP_BR_STATE_WAIT_APP_RSP},
/* BR_BOND_REQ */
{SMP_BR_KEY_DISTRIBUTION, SMP_BR_SM_NO_ACTION,
SMP_BR_STATE_BOND_PENDING}};
static const uint8_t smp_br_slave_bond_pending_table[][SMP_BR_SM_NUM_COLS] = {
/* Event Action Next State */
/* BR_ID_INFO */
{SMP_PROC_ID_INFO, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING},
/* BR_ID_ADDR */
{SMP_PROC_ID_ADDR, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING},
/* BR_SIGN_INFO */
{SMP_PROC_SRK_INFO, SMP_BR_SM_NO_ACTION, SMP_BR_STATE_BOND_PENDING}};
static const tSMP_BR_SM_TBL smp_br_state_table[][2] = {
/* SMP_BR_STATE_IDLE */
{smp_br_master_idle_table, smp_br_slave_idle_table},
/* SMP_BR_STATE_WAIT_APP_RSP */
{smp_br_master_wait_appln_response_table,
smp_br_slave_wait_appln_response_table},
/* SMP_BR_STATE_PAIR_REQ_RSP */
{smp_br_master_pair_request_response_table, NULL},
/* SMP_BR_STATE_BOND_PENDING */
{smp_br_master_bond_pending_table, smp_br_slave_bond_pending_table},
};
typedef const uint8_t (*tSMP_BR_ENTRY_TBL)[SMP_BR_STATE_MAX];
static const tSMP_BR_ENTRY_TBL smp_br_entry_table[] = {smp_br_master_entry_map,
smp_br_slave_entry_map};
#define SMP_BR_ALL_TABLE_MASK 0x80
/*******************************************************************************
* Function smp_set_br_state
* Returns None
******************************************************************************/
void smp_set_br_state(tSMP_BR_STATE br_state) {
if (br_state < SMP_BR_STATE_MAX) {
SMP_TRACE_DEBUG("BR_State change: %s(%d) ==> %s(%d)",
smp_get_br_state_name(smp_cb.br_state), smp_cb.br_state,
smp_get_br_state_name(br_state), br_state);
smp_cb.br_state = br_state;
} else {
SMP_TRACE_DEBUG("%s invalid br_state =%d", __func__, br_state);
}
}
/*******************************************************************************
* Function smp_get_br_state
* Returns The smp_br state
******************************************************************************/
tSMP_BR_STATE smp_get_br_state(void) { return smp_cb.br_state; }
/*******************************************************************************
* Function smp_get_br_state_name
* Returns The smp_br state name.
******************************************************************************/
const char* smp_get_br_state_name(tSMP_BR_STATE br_state) {
const char* p_str = smp_br_state_name[SMP_BR_STATE_MAX];
if (br_state < SMP_BR_STATE_MAX) p_str = smp_br_state_name[br_state];
return p_str;
}
/*******************************************************************************
* Function smp_get_br_event_name
* Returns The smp_br event name.
******************************************************************************/
const char* smp_get_br_event_name(tSMP_BR_EVENT event) {
const char* p_str = smp_br_event_name[SMP_BR_MAX_EVT - 1];
if (event < SMP_BR_MAX_EVT) {
p_str = smp_br_event_name[event - 1];
}
return p_str;
}
/*******************************************************************************
*
* Function smp_br_state_machine_event
*
* Description Handle events to the state machine. It looks up the entry
* in the smp_br_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.
*
* Returns void.
*
******************************************************************************/
void smp_br_state_machine_event(tSMP_CB* p_cb, tSMP_BR_EVENT event,
tSMP_INT_DATA* p_data) {
tSMP_BR_STATE curr_state = p_cb->br_state;
tSMP_BR_SM_TBL state_table;
uint8_t action, entry;
tSMP_BR_ENTRY_TBL entry_table = smp_br_entry_table[p_cb->role];
SMP_TRACE_EVENT("main %s", __func__);
if (curr_state >= SMP_BR_STATE_MAX) {
SMP_TRACE_DEBUG("Invalid br_state: %d", curr_state);
return;
}
if (p_cb->role > HCI_ROLE_SLAVE) {
SMP_TRACE_ERROR("%s: invalid role %d", __func__, p_cb->role);
android_errorWriteLog(0x534e4554, "80145946");
return;
}
SMP_TRACE_DEBUG("SMP Role: %s State: [%s (%d)], Event: [%s (%d)]",
(p_cb->role == HCI_ROLE_SLAVE) ? "Slave" : "Master",
smp_get_br_state_name(p_cb->br_state), p_cb->br_state,
smp_get_br_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_BR_MAX_EVT) &&
((entry = entry_table[event - 1][curr_state]) != SMP_BR_SM_IGNORE)) {
if (entry & SMP_BR_ALL_TABLE_MASK) {
entry &= ~SMP_BR_ALL_TABLE_MASK;
state_table = smp_br_all_table;
} else {
state_table = smp_br_state_table[curr_state][p_cb->role];
}
} else {
SMP_TRACE_DEBUG("Ignore event [%s (%d)] in state [%s (%d)]",
smp_get_br_event_name(event), event,
smp_get_br_state_name(curr_state), curr_state);
return;
}
/* Get possible next state from state table. */
smp_set_br_state(state_table[entry - 1][SMP_BR_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 functions */
for (uint8_t i = 0; i < SMP_BR_NUM_ACTIONS; i++) {
action = state_table[entry - 1][i];
if (action != SMP_BR_SM_NO_ACTION) {
(*smp_br_sm_action[action])(p_cb, p_data);
} else {
break;
}
}
SMP_TRACE_DEBUG("result state = %s", smp_get_br_state_name(p_cb->br_state));
}