621 lines
20 KiB
C
621 lines
20 KiB
C
/******************************************************************************
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*
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* Copyright (C) 2008-2012 Broadcom Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************/
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/******************************************************************************
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*
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* This file contains the implementation of the SMP interface used by
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* applications that can run over an SMP.
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*
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******************************************************************************/
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#include <string.h>
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#include "common/bt_target.h"
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//#include "bt_utils.h"
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#if SMP_INCLUDED == TRUE
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#include "smp_int.h"
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#include "stack/smp_api.h"
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#include "stack/l2cdefs.h"
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#include "l2c_int.h"
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#include "btm_int.h"
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#include "stack/hcimsgs.h"
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#include "stack/btu.h"
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#include "p_256_ecc_pp.h"
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#include "osi/allocator.h"
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/*******************************************************************************
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**
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** Function SMP_Init
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**
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** Description This function initializes the SMP unit.
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**
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** Returns void
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**
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*******************************************************************************/
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void SMP_Init(void)
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{
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#if SMP_DYNAMIC_MEMORY
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smp_cb_ptr = (tSMP_CB *)osi_malloc(sizeof(tSMP_CB));
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#endif
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memset(&smp_cb, 0, sizeof(tSMP_CB));
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#if defined(SMP_INITIAL_TRACE_LEVEL)
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smp_cb.trace_level = SMP_INITIAL_TRACE_LEVEL;
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#else
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smp_cb.trace_level = BT_TRACE_LEVEL_NONE; /* No traces */
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#endif
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SMP_TRACE_EVENT ("%s", __FUNCTION__);
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smp_l2cap_if_init();
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/* initialization of P-256 parameters */
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p_256_init_curve(KEY_LENGTH_DWORDS_P256);
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}
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void SMP_Free(void)
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{
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memset(&smp_cb, 0, sizeof(tSMP_CB));
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#if SMP_DYNAMIC_MEMORY
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FREE_AND_RESET(smp_cb_ptr);
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#endif /* #if SMP_DYNAMIC_MEMORY */
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}
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/*******************************************************************************
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**
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** Function SMP_SetTraceLevel
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**
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** Description This function sets the trace level for SMP. If called with
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** a value of 0xFF, it simply returns the current trace level.
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**
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** Input Parameters:
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** level: The level to set the GATT tracing to:
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** 0xff-returns the current setting.
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** 0-turns off tracing.
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** >= 1-Errors.
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** >= 2-Warnings.
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** >= 3-APIs.
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** >= 4-Events.
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** >= 5-Debug.
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**
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** Returns The new or current trace level
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**
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*******************************************************************************/
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extern UINT8 SMP_SetTraceLevel (UINT8 new_level)
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{
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if (new_level != 0xFF) {
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smp_cb.trace_level = new_level;
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}
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return (smp_cb.trace_level);
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}
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/*******************************************************************************
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**
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** Function SMP_Register
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**
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** Description This function register for the SMP services callback.
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**
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** Returns void
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**
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*******************************************************************************/
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BOOLEAN SMP_Register (tSMP_CALLBACK *p_cback)
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{
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SMP_TRACE_EVENT ("SMP_Register state=%d", smp_cb.state);
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if (smp_cb.p_callback != NULL) {
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SMP_TRACE_ERROR ("SMP_Register: duplicate registration, overwrite it");
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}
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smp_cb.p_callback = p_cback;
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return (TRUE);
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}
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/*******************************************************************************
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**
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** Function SMP_Pair
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**
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** Description This function call to perform a SMP pairing with peer device.
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** Device support one SMP pairing at one time.
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**
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** Parameters bd_addr - peer device bd address.
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**
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** Returns None
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**
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*******************************************************************************/
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tSMP_STATUS SMP_Pair (BD_ADDR bd_addr)
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{
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tSMP_CB *p_cb = &smp_cb;
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UINT8 status = SMP_PAIR_INTERNAL_ERR;
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SMP_TRACE_EVENT ("%s state=%d br_state=%d flag=0x%x \n",
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__FUNCTION__, p_cb->state, p_cb->br_state, p_cb->flags);
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if (p_cb->state != SMP_STATE_IDLE || p_cb->flags & SMP_PAIR_FLAGS_WE_STARTED_DD ||
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p_cb->smp_over_br) {
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/* pending security on going, reject this one */
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return SMP_BUSY;
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} else {
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p_cb->flags = SMP_PAIR_FLAGS_WE_STARTED_DD;
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memcpy (p_cb->pairing_bda, bd_addr, BD_ADDR_LEN);
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if (!L2CA_ConnectFixedChnl (L2CAP_SMP_CID, bd_addr, BLE_ADDR_UNKNOWN_TYPE)) {
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SMP_TRACE_ERROR("%s: L2C connect fixed channel failed.\n", __FUNCTION__);
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &status);
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return status;
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}
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return SMP_STARTED;
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}
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}
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/*******************************************************************************
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**
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** Function SMP_BR_PairWith
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**
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** Description This function is called to start a SMP pairing over BR/EDR.
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** Device support one SMP pairing at one time.
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**
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** Parameters bd_addr - peer device bd address.
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**
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** Returns SMP_STARTED if pairing started, otherwise reason for failure.
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**
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*******************************************************************************/
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tSMP_STATUS SMP_BR_PairWith (BD_ADDR bd_addr)
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{
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tSMP_CB *p_cb = &smp_cb;
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UINT8 status = SMP_PAIR_INTERNAL_ERR;
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SMP_TRACE_EVENT ("%s state=%d br_state=%d flag=0x%x ",
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__func__, p_cb->state, p_cb->br_state, p_cb->flags);
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if (p_cb->state != SMP_STATE_IDLE ||
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p_cb->smp_over_br ||
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p_cb->flags & SMP_PAIR_FLAGS_WE_STARTED_DD) {
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/* pending security on going, reject this one */
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return SMP_BUSY;
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}
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p_cb->role = HCI_ROLE_MASTER;
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p_cb->flags = SMP_PAIR_FLAGS_WE_STARTED_DD;
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p_cb->smp_over_br = TRUE;
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memcpy (p_cb->pairing_bda, bd_addr, BD_ADDR_LEN);
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if (!L2CA_ConnectFixedChnl (L2CAP_SMP_BR_CID, bd_addr, BLE_ADDR_UNKNOWN_TYPE)) {
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SMP_TRACE_ERROR("%s: L2C connect fixed channel failed.", __FUNCTION__);
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smp_br_state_machine_event(p_cb, SMP_BR_AUTH_CMPL_EVT, &status);
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return status;
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}
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return SMP_STARTED;
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}
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/*******************************************************************************
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**
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** Function SMP_PairCancel
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**
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** Description This function call to cancel a SMP pairing with peer device.
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**
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** Parameters bd_addr - peer device bd address.
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**
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** Returns TRUE - Pairining is cancelled
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**
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*******************************************************************************/
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BOOLEAN SMP_PairCancel (BD_ADDR bd_addr)
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{
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tSMP_CB *p_cb = &smp_cb;
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UINT8 err_code = SMP_PAIR_FAIL_UNKNOWN;
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BOOLEAN status = FALSE;
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BTM_TRACE_EVENT ("SMP_CancelPair state=%d flag=0x%x ", p_cb->state, p_cb->flags);
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if ( (p_cb->state != SMP_STATE_IDLE) &&
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(!memcmp (p_cb->pairing_bda, bd_addr, BD_ADDR_LEN)) ) {
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p_cb->is_pair_cancel = TRUE;
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SMP_TRACE_DEBUG("Cancel Pairing: set fail reason Unknown");
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &err_code);
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status = TRUE;
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}
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return status;
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}
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/*******************************************************************************
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**
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** Function SMP_SecurityGrant
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**
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** Description This function is called to grant security process.
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**
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** Parameters bd_addr - peer device bd address.
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** res - result of the operation SMP_SUCCESS if success.
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** Otherwise, SMP_REPEATED_ATTEMPTS is too many attempts.
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**
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** Returns None
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**
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*******************************************************************************/
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void SMP_SecurityGrant(BD_ADDR bd_addr, UINT8 res)
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{
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SMP_TRACE_EVENT ("SMP_SecurityGrant ");
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if (smp_cb.smp_over_br) {
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if (smp_cb.br_state != SMP_BR_STATE_WAIT_APP_RSP ||
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smp_cb.cb_evt != SMP_SEC_REQUEST_EVT ||
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memcmp (smp_cb.pairing_bda, bd_addr, BD_ADDR_LEN)) {
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return;
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}
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/* clear the SMP_SEC_REQUEST_EVT event after get grant */
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/* avoid generating duplicate pair request */
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smp_cb.cb_evt = 0;
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smp_br_state_machine_event(&smp_cb, SMP_BR_API_SEC_GRANT_EVT, &res);
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return;
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}
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if (smp_cb.state != SMP_STATE_WAIT_APP_RSP ||
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smp_cb.cb_evt != SMP_SEC_REQUEST_EVT ||
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memcmp (smp_cb.pairing_bda, bd_addr, BD_ADDR_LEN)) {
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return;
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}
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/* clear the SMP_SEC_REQUEST_EVT event after get grant */
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/* avoid generate duplicate pair request */
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smp_cb.cb_evt = 0;
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smp_sm_event(&smp_cb, SMP_API_SEC_GRANT_EVT, &res);
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}
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/*******************************************************************************
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**
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** Function SMP_PasskeyReply
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**
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** Description This function is called after Security Manager submitted
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** passkey request to the application.
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**
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** Parameters: bd_addr - Address of the device for which passkey was requested
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** res - result of the operation SMP_SUCCESS if success
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** passkey - numeric value in the range of
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** BTM_MIN_PASSKEY_VAL(0) - BTM_MAX_PASSKEY_VAL(999999(0xF423F)).
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**
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*******************************************************************************/
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void SMP_PasskeyReply (BD_ADDR bd_addr, UINT8 res, UINT32 passkey)
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{
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tSMP_CB *p_cb = & smp_cb;
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UINT8 failure = SMP_PASSKEY_ENTRY_FAIL;
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SMP_TRACE_EVENT ("SMP_PasskeyReply: Key: %d Result:%d",
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passkey, res);
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/* If timeout already expired or has been canceled, ignore the reply */
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if (p_cb->cb_evt != SMP_PASSKEY_REQ_EVT) {
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SMP_TRACE_WARNING ("SMP_PasskeyReply() - Wrong State: %d", p_cb->state);
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return;
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}
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if (memcmp (bd_addr, p_cb->pairing_bda, BD_ADDR_LEN) != 0) {
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SMP_TRACE_ERROR ("SMP_PasskeyReply() - Wrong BD Addr");
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return;
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}
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if (btm_find_dev (bd_addr) == NULL) {
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SMP_TRACE_ERROR ("SMP_PasskeyReply() - no dev CB");
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return;
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}
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if (passkey > BTM_MAX_PASSKEY_VAL || res != SMP_SUCCESS) {
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SMP_TRACE_WARNING ("SMP_PasskeyReply() - Wrong key len: %d or passkey entry fail", passkey);
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/* send pairing failure */
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &failure);
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} else if (p_cb->selected_association_model == SMP_MODEL_SEC_CONN_PASSKEY_ENT) {
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smp_sm_event(&smp_cb, SMP_SC_KEY_READY_EVT, &passkey);
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} else {
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smp_convert_string_to_tk(p_cb->tk, passkey);
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}
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return;
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}
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/*******************************************************************************
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**
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** Function SMP_SetStaticPasskey
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**
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** Description This function is called to set static passkey
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**
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**
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** Parameters: add - set static passkey when add is TRUE
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** clear static passkey when add is FALSE
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** passkey - static passkey
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**
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**
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*******************************************************************************/
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void SMP_SetStaticPasskey (BOOLEAN add, UINT32 passkey)
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{
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SMP_TRACE_DEBUG("static passkey %6d", passkey);
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tSMP_CB *p_cb = & smp_cb;
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if(add) {
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p_cb->static_passkey = passkey;
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p_cb->use_static_passkey = true;
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} else {
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p_cb->static_passkey = 0;
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p_cb->use_static_passkey = false;
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}
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}
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/*******************************************************************************
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**
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** Function SMP_ConfirmReply
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**
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** Description This function is called after Security Manager submitted
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** numeric comparison request to the application.
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**
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** Parameters: bd_addr - Address of the device with which numeric
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** comparison was requested
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** res - comparison result SMP_SUCCESS if success
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**
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*******************************************************************************/
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void SMP_ConfirmReply (BD_ADDR bd_addr, UINT8 res)
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{
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tSMP_CB *p_cb = & smp_cb;
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UINT8 failure = SMP_NUMERIC_COMPAR_FAIL;
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SMP_TRACE_EVENT ("%s: Result:%d", __FUNCTION__, res);
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/* If timeout already expired or has been canceled, ignore the reply */
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if (p_cb->cb_evt != SMP_NC_REQ_EVT) {
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SMP_TRACE_WARNING ("%s() - Wrong State: %d", __FUNCTION__, p_cb->state);
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return;
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}
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if (memcmp (bd_addr, p_cb->pairing_bda, BD_ADDR_LEN) != 0) {
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SMP_TRACE_ERROR ("%s() - Wrong BD Addr", __FUNCTION__);
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return;
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}
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if (btm_find_dev (bd_addr) == NULL) {
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SMP_TRACE_ERROR ("%s() - no dev CB", __FUNCTION__);
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return;
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}
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if (res != SMP_SUCCESS) {
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SMP_TRACE_WARNING ("%s() - Numeric Comparison fails", __FUNCTION__);
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/* send pairing failure */
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &failure);
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} else {
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smp_sm_event(p_cb, SMP_SC_NC_OK_EVT, NULL);
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}
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}
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/*******************************************************************************
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**
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** Function SMP_OobDataReply
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**
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** Description This function is called to provide the OOB data for
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** SMP in response to SMP_OOB_REQ_EVT
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**
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** Parameters: bd_addr - Address of the peer device
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** res - result of the operation SMP_SUCCESS if success
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** p_data - simple pairing Randomizer C.
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**
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*******************************************************************************/
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void SMP_OobDataReply(BD_ADDR bd_addr, tSMP_STATUS res, UINT8 len, UINT8 *p_data)
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{
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tSMP_CB *p_cb = & smp_cb;
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UINT8 failure = SMP_OOB_FAIL;
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tSMP_KEY key;
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SMP_TRACE_EVENT ("%s State: %d res:%d", __FUNCTION__, smp_cb.state, res);
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/* If timeout already expired or has been canceled, ignore the reply */
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if (p_cb->state != SMP_STATE_WAIT_APP_RSP || p_cb->cb_evt != SMP_OOB_REQ_EVT) {
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return;
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}
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if (res != SMP_SUCCESS || len == 0 || !p_data) {
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &failure);
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} else {
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if (len > BT_OCTET16_LEN) {
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len = BT_OCTET16_LEN;
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}
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memcpy(p_cb->tk, p_data, len);
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key.key_type = SMP_KEY_TYPE_TK;
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key.p_data = p_cb->tk;
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smp_sm_event(&smp_cb, SMP_KEY_READY_EVT, &key);
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}
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}
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/*******************************************************************************
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**
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** Function SMP_SecureConnectionOobDataReply
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**
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** Description This function is called to provide the SC OOB data for
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** SMP in response to SMP_SC_OOB_REQ_EVT
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**
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** Parameters: p_data - pointer to the data
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**
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*******************************************************************************/
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void SMP_SecureConnectionOobDataReply(UINT8 *p_data)
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{
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tSMP_CB *p_cb = &smp_cb;
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UINT8 failure = SMP_OOB_FAIL;
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tSMP_SC_OOB_DATA *p_oob = (tSMP_SC_OOB_DATA *) p_data;
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if (!p_oob) {
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SMP_TRACE_ERROR("%s received no data", __FUNCTION__);
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smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &failure);
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return;
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}
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SMP_TRACE_EVENT ("%s req_oob_type: %d, loc_oob_data.present: %d, "
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"peer_oob_data.present: %d",
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__FUNCTION__, p_cb->req_oob_type, p_oob->loc_oob_data.present,
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p_oob->peer_oob_data.present);
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if (p_cb->state != SMP_STATE_WAIT_APP_RSP || p_cb->cb_evt != SMP_SC_OOB_REQ_EVT) {
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return;
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}
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BOOLEAN data_missing = FALSE;
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switch (p_cb->req_oob_type) {
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case SMP_OOB_PEER:
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if (!p_oob->peer_oob_data.present) {
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data_missing = TRUE;
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}
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break;
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case SMP_OOB_LOCAL:
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if (!p_oob->loc_oob_data.present) {
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data_missing = TRUE;
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}
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break;
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case SMP_OOB_BOTH:
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if (!p_oob->loc_oob_data.present || !p_oob->peer_oob_data.present) {
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data_missing = TRUE;
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}
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break;
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default:
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SMP_TRACE_EVENT ("Unexpected OOB data type requested. Fail OOB");
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data_missing = TRUE;
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break;
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}
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|
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if (data_missing) {
|
|
smp_sm_event(p_cb, SMP_AUTH_CMPL_EVT, &failure);
|
|
return;
|
|
}
|
|
|
|
p_cb->sc_oob_data = *p_oob;
|
|
|
|
smp_sm_event(&smp_cb, SMP_SC_OOB_DATA_EVT, p_data);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function SMP_Encrypt
|
|
**
|
|
** Description This function is called to encrypt the data with the specified
|
|
** key
|
|
**
|
|
** Parameters: key - Pointer to key key[0] conatins the MSB
|
|
** key_len - key length
|
|
** plain_text - Pointer to data to be encrypted
|
|
** plain_text[0] conatins the MSB
|
|
** pt_len - plain text length
|
|
** p_out - output of the encrypted texts
|
|
**
|
|
** Returns Boolean - request is successful
|
|
*******************************************************************************/
|
|
BOOLEAN SMP_Encrypt (UINT8 *key, UINT8 key_len,
|
|
UINT8 *plain_text, UINT8 pt_len,
|
|
tSMP_ENC *p_out)
|
|
|
|
{
|
|
BOOLEAN status = FALSE;
|
|
status = smp_encrypt_data(key, key_len, plain_text, pt_len, p_out);
|
|
return status;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function SMP_KeypressNotification
|
|
**
|
|
** Description This function is called to notify Security Manager about Keypress Notification.
|
|
**
|
|
** Parameters: bd_addr Address of the device to send keypress notification to
|
|
** value Keypress notification parameter value
|
|
**
|
|
*******************************************************************************/
|
|
void SMP_KeypressNotification (BD_ADDR bd_addr, UINT8 value)
|
|
{
|
|
tSMP_CB *p_cb = &smp_cb;
|
|
|
|
SMP_TRACE_EVENT ("%s: Value: %d", __FUNCTION__, value);
|
|
|
|
if (memcmp (bd_addr, p_cb->pairing_bda, BD_ADDR_LEN) != 0) {
|
|
SMP_TRACE_ERROR ("%s() - Wrong BD Addr", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
if (btm_find_dev (bd_addr) == NULL) {
|
|
SMP_TRACE_ERROR ("%s() - no dev CB", __FUNCTION__);
|
|
return;
|
|
}
|
|
|
|
/* Keypress Notification is used by a device with KeyboardOnly IO capabilities */
|
|
/* during the passkey entry protocol */
|
|
if (p_cb->local_io_capability != SMP_IO_CAP_IN) {
|
|
SMP_TRACE_ERROR ("%s() - wrong local IO capabilities %d",
|
|
__FUNCTION__, p_cb->local_io_capability);
|
|
return;
|
|
}
|
|
|
|
if (p_cb->selected_association_model != SMP_MODEL_SEC_CONN_PASSKEY_ENT) {
|
|
SMP_TRACE_ERROR ("%s() - wrong protocol %d", __FUNCTION__,
|
|
p_cb->selected_association_model);
|
|
return;
|
|
}
|
|
|
|
smp_sm_event(p_cb, SMP_KEYPRESS_NOTIFICATION_EVENT, &value);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function SMP_CreateLocalSecureConnectionsOobData
|
|
**
|
|
** Description This function is called to start creation of local SC OOB
|
|
** data set (tSMP_LOC_OOB_DATA).
|
|
**
|
|
** Parameters: bd_addr - Address of the device to send OOB data block to
|
|
**
|
|
** Returns Boolean - TRUE: creation of local SC OOB data set started.
|
|
*******************************************************************************/
|
|
BOOLEAN SMP_CreateLocalSecureConnectionsOobData (tBLE_BD_ADDR *addr_to_send_to)
|
|
{
|
|
tSMP_CB *p_cb = &smp_cb;
|
|
#if (!CONFIG_BT_STACK_NO_LOG)
|
|
UINT8 *bd_addr;
|
|
#endif
|
|
|
|
if (addr_to_send_to == NULL) {
|
|
SMP_TRACE_ERROR ("%s addr_to_send_to is not provided", __FUNCTION__);
|
|
return FALSE;
|
|
}
|
|
|
|
#if (!CONFIG_BT_STACK_NO_LOG)
|
|
bd_addr = addr_to_send_to->bda;
|
|
#endif
|
|
|
|
SMP_TRACE_EVENT ("%s addr type: %u, BDA: %08x%04x, state: %u, br_state: %u",
|
|
__FUNCTION__, addr_to_send_to->type,
|
|
(bd_addr[0] << 24) + (bd_addr[1] << 16) + (bd_addr[2] << 8) + bd_addr[3],
|
|
(bd_addr[4] << 8) + bd_addr[5],
|
|
p_cb->state,
|
|
p_cb->br_state);
|
|
|
|
if ((p_cb->state != SMP_STATE_IDLE) || (p_cb->smp_over_br)) {
|
|
SMP_TRACE_WARNING ("%s creation of local OOB data set "\
|
|
"starts only in IDLE state", __FUNCTION__);
|
|
return FALSE;
|
|
}
|
|
|
|
p_cb->sc_oob_data.loc_oob_data.addr_sent_to = *addr_to_send_to;
|
|
smp_sm_event(p_cb, SMP_CR_LOC_SC_OOB_DATA_EVT, NULL);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#endif /* SMP_INCLUDED */
|