| /****************************************************************************** |
| * |
| * 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 "osi/include/log.h" |
| #include "smp_int.h" |
| #include "types/hci_role.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_CENTRAL_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_peripheral_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 Central FSM State/Event Indirection Table **************/ |
| static const uint8_t smp_br_central_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_CENTRAL_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_central_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_central_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_central_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_central_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_peripheral_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_CENTRAL_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_peripheral_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_peripheral_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_peripheral_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_central_idle_table, smp_br_peripheral_idle_table}, |
| |
| /* SMP_BR_STATE_WAIT_APP_RSP */ |
| {smp_br_central_wait_appln_response_table, |
| smp_br_peripheral_wait_appln_response_table}, |
| |
| /* SMP_BR_STATE_PAIR_REQ_RSP */ |
| {smp_br_central_pair_request_response_table, NULL}, |
| |
| /* SMP_BR_STATE_BOND_PENDING */ |
| {smp_br_central_bond_pending_table, smp_br_peripheral_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_central_entry_map, smp_br_peripheral_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; |
| |
| 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_PERIPHERAL) { |
| SMP_TRACE_ERROR("%s: invalid role %d", __func__, p_cb->role); |
| android_errorWriteLog(0x534e4554, "80145946"); |
| return; |
| } |
| |
| tSMP_BR_ENTRY_TBL entry_table = smp_br_entry_table[p_cb->role]; |
| |
| SMP_TRACE_DEBUG( |
| "SMP Role: %s State: [%s (%d)], Event: [%s (%d)]", |
| (p_cb->role == HCI_ROLE_PERIPHERAL) ? "Peripheral" : "Central", |
| 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)); |
| } |
