diff options
author | Satya Calloji <satyac@broadcom.com> | 2015-03-06 10:38:22 -0800 |
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committer | Andre Eisenbach <eisenbach@google.com> | 2015-04-13 00:09:06 -0700 |
commit | 444a8da807abaf5f9e813ce70c56a79160495fb3 (patch) | |
tree | 20a35a257203d1a87f34d887ffba13672af4288a /stack/smp/smp_br_main.c | |
parent | 8372aa5fa535ee4f09c09981b6125b54ace31fe2 (diff) | |
download | android_system_bt-444a8da807abaf5f9e813ce70c56a79160495fb3.tar.gz android_system_bt-444a8da807abaf5f9e813ce70c56a79160495fb3.tar.bz2 android_system_bt-444a8da807abaf5f9e813ce70c56a79160495fb3.zip |
LE Privacy 1.2 and LE secure connections
Bug: 19816438
Original author: Chaojing Sun <cjsun@broadcom.com>
Change-Id: I5951f4d4e038f8348a62aa6d19b2111bae0b3ecc
Diffstat (limited to 'stack/smp/smp_br_main.c')
-rw-r--r-- | stack/smp/smp_br_main.c | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/stack/smp/smp_br_main.c b/stack/smp/smp_br_main.c new file mode 100644 index 000000000..573db7fbc --- /dev/null +++ b/stack/smp/smp_br_main.c @@ -0,0 +1,397 @@ +/****************************************************************************** + * + * 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 <string.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 (*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 ) ) ; +} + + |