/****************************************************************************** * * Copyright (C) 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 #include "smp_int.h" #if BLE_INCLUDED == TRUE 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 (*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_br_send_pair_response, smp_send_pair_fail, smp_send_id_info, smp_br_process_pairing_command, smp_proc_pair_fail, smp_proc_id_info, smp_proc_id_addr, smp_proc_srk_info, smp_br_process_security_grant, smp_br_process_slave_keys_response, smp_br_select_next_key, smp_br_pairing_complete, smp_send_app_cback, smp_br_check_authorization_request, smp_pair_terminate, smp_idle_terminate }; static const UINT8 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 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 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 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 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 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 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 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 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 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 (*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", __FUNCTION__,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, void *p_data) { tSMP_BR_STATE curr_state = p_cb->br_state; tSMP_BR_SM_TBL state_table; UINT8 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; } 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 i = 0; i < SMP_BR_NUM_ACTIONS; i++) { if ((action = state_table[entry - 1][i]) < SMP_BR_SM_NO_ACTION) { (*smp_br_sm_action[action])(p_cb, (tSMP_INT_DATA *)p_data); } else { break; } } SMP_TRACE_DEBUG( "result state = %s", smp_get_br_state_name( p_cb->br_state ) ) ; } #endif