607 lines
21 KiB
C
607 lines
21 KiB
C
/******************************************************************************
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*
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* Copyright (C) 1999-2012 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 functions for BLE address management.
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*
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******************************************************************************/
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#include <string.h>
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#include "bt_types.h"
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#include "hcimsgs.h"
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#include "btu.h"
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#include "btm_int.h"
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#include "gap_api.h"
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#include "controller.h"
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#if (defined BLE_INCLUDED && BLE_INCLUDED == TRUE)
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#include "btm_ble_int.h"
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#include "smp_api.h"
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/*******************************************************************************
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**
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** Function btm_gen_resolve_paddr_cmpl
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**
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** Description This is callback functioin when resolvable private address
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** generation is complete.
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**
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** Returns void
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**
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*******************************************************************************/
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static void btm_gen_resolve_paddr_cmpl(tSMP_ENC *p)
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{
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tBTM_LE_RANDOM_CB *p_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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BTM_TRACE_EVENT ("btm_gen_resolve_paddr_cmpl");
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if (p) {
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/* set hash to be LSB of rpAddress */
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p_cb->private_addr[5] = p->param_buf[0];
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p_cb->private_addr[4] = p->param_buf[1];
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p_cb->private_addr[3] = p->param_buf[2];
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/* set it to controller */
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btsnd_hcic_ble_set_random_addr(p_cb->private_addr);
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p_cb->own_addr_type = BLE_ADDR_RANDOM;
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/* start a periodical timer to refresh random addr */
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btu_stop_timer_oneshot(&p_cb->raddr_timer_ent);
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#if (BTM_BLE_CONFORMANCE_TESTING == TRUE)
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btu_start_timer_oneshot(&p_cb->raddr_timer_ent, BTU_TTYPE_BLE_RANDOM_ADDR,
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btm_cb.ble_ctr_cb.rpa_tout);
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#else
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btu_start_timer_oneshot(&p_cb->raddr_timer_ent, BTU_TTYPE_BLE_RANDOM_ADDR,
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BTM_BLE_PRIVATE_ADDR_INT);
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#endif
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} else {
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/* random address set failure */
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BTM_TRACE_DEBUG("set random address failed");
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}
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}
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/*******************************************************************************
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**
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** Function btm_gen_resolve_paddr_low
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**
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** Description This function is called when random address has generate the
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** random number base for low 3 byte bd address.
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**
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** Returns void
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**
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*******************************************************************************/
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void btm_gen_resolve_paddr_low(tBTM_RAND_ENC *p)
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{
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#if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE)
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tBTM_LE_RANDOM_CB *p_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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tSMP_ENC output;
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BTM_TRACE_EVENT ("btm_gen_resolve_paddr_low");
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if (p) {
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p->param_buf[2] &= (~BLE_RESOLVE_ADDR_MASK);
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p->param_buf[2] |= BLE_RESOLVE_ADDR_MSB;
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p_cb->private_addr[2] = p->param_buf[0];
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p_cb->private_addr[1] = p->param_buf[1];
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p_cb->private_addr[0] = p->param_buf[2];
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/* encrypt with ur IRK */
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if (!SMP_Encrypt(btm_cb.devcb.id_keys.irk, BT_OCTET16_LEN, p->param_buf, 3, &output)) {
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btm_gen_resolve_paddr_cmpl(NULL);
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} else {
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btm_gen_resolve_paddr_cmpl(&output);
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}
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}
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#endif
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}
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/*******************************************************************************
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**
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** Function btm_gen_resolvable_private_addr
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**
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** Description This function generate a resolvable private address.
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**
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** Returns void
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**
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*******************************************************************************/
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void btm_gen_resolvable_private_addr (void *p_cmd_cplt_cback)
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{
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BTM_TRACE_EVENT ("btm_gen_resolvable_private_addr");
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/* generate 3B rand as BD LSB, SRK with it, get BD MSB */
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if (!btsnd_hcic_ble_rand((void *)p_cmd_cplt_cback)) {
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btm_gen_resolve_paddr_cmpl(NULL);
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}
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}
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/*******************************************************************************
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**
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** Function btm_gen_non_resolve_paddr_cmpl
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**
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** Description This is the callback function when non-resolvable private
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** function is generated and write to controller.
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**
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** Returns void
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**
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*******************************************************************************/
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static void btm_gen_non_resolve_paddr_cmpl(tBTM_RAND_ENC *p)
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{
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tBTM_LE_RANDOM_CB *p_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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tBTM_BLE_ADDR_CBACK *p_cback = p_cb->p_generate_cback;
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void *p_data = p_cb->p;
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UINT8 *pp;
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BD_ADDR static_random;
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BTM_TRACE_EVENT ("btm_gen_non_resolve_paddr_cmpl");
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p_cb->p_generate_cback = NULL;
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if (p) {
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pp = p->param_buf;
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STREAM_TO_BDADDR(static_random, pp);
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/* mask off the 2 MSB */
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static_random[0] &= BLE_STATIC_PRIVATE_MSB_MASK;
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/* report complete */
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if (p_cback) {
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(* p_cback)(static_random, p_data);
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}
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} else {
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BTM_TRACE_DEBUG("btm_gen_non_resolvable_private_addr failed");
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if (p_cback) {
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(* p_cback)(NULL, p_data);
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}
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}
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}
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/*******************************************************************************
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**
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** Function btm_gen_non_resolvable_private_addr
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**
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** Description This function generate a non-resolvable private address.
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**
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**
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** Returns void
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**
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*******************************************************************************/
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void btm_gen_non_resolvable_private_addr (tBTM_BLE_ADDR_CBACK *p_cback, void *p)
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{
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tBTM_LE_RANDOM_CB *p_mgnt_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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BTM_TRACE_EVENT ("btm_gen_non_resolvable_private_addr");
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if (p_mgnt_cb->p_generate_cback != NULL) {
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return;
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}
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p_mgnt_cb->p_generate_cback = p_cback;
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p_mgnt_cb->p = p;
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if (!btsnd_hcic_ble_rand((void *)btm_gen_non_resolve_paddr_cmpl)) {
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btm_gen_non_resolve_paddr_cmpl(NULL);
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}
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}
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/*******************************************************************************
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** Utility functions for Random address resolving
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*******************************************************************************/
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/*******************************************************************************
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**
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** Function btm_ble_resolve_address_cmpl
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**
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** Description This function sends the random address resolving complete
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** callback.
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**
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** Returns None.
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**
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*******************************************************************************/
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#if SMP_INCLUDED == TRUE
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static void btm_ble_resolve_address_cmpl(void)
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{
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tBTM_LE_RANDOM_CB *p_mgnt_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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tBTM_SEC_DEV_REC *p_dev_rec = NULL;
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BTM_TRACE_EVENT ("btm_ble_resolve_address_cmpl p_mgnt_cb->index = %d", p_mgnt_cb->index);
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if (p_mgnt_cb->index < BTM_SEC_MAX_DEVICE_RECORDS) {
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p_dev_rec = &btm_cb.sec_dev_rec[p_mgnt_cb->index];
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}
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p_mgnt_cb->busy = FALSE;
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(* p_mgnt_cb->p_resolve_cback)(p_dev_rec, p_mgnt_cb->p);
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}
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/*******************************************************************************
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**
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** Function btm_ble_proc_resolve_x
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**
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** Description This function compares the X with random address 3 MSO bytes
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** to find a match, if not match, continue for next record.
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**
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** Returns None.
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**
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*******************************************************************************/
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static BOOLEAN btm_ble_proc_resolve_x(tSMP_ENC *p)
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{
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tBTM_LE_RANDOM_CB *p_mgnt_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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UINT8 comp[3];
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BTM_TRACE_EVENT ("btm_ble_proc_resolve_x");
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/* compare the hash with 3 LSB of bd address */
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comp[0] = p_mgnt_cb->random_bda[5];
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comp[1] = p_mgnt_cb->random_bda[4];
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comp[2] = p_mgnt_cb->random_bda[3];
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if (p) {
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if (!memcmp(p->param_buf, &comp[0], 3)) {
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/* match is found */
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BTM_TRACE_EVENT ("match is found");
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btm_ble_resolve_address_cmpl();
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return TRUE;
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}
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}
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return FALSE;
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}
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#endif ///SMP_INCLUDED == TRUE
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/*******************************************************************************
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**
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** Function btm_ble_init_pseudo_addr
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**
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** Description This function is used to initialize pseudo address.
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** If pseudo address is not available, use dummy address
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**
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** Returns TRUE is updated; FALSE otherwise.
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**
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*******************************************************************************/
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BOOLEAN btm_ble_init_pseudo_addr (tBTM_SEC_DEV_REC *p_dev_rec, BD_ADDR new_pseudo_addr)
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{
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#if (SMP_INCLUDED == TRUE)
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BD_ADDR dummy_bda = {0};
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if (memcmp(p_dev_rec->ble.pseudo_addr, dummy_bda, BD_ADDR_LEN) == 0) {
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memcpy(p_dev_rec->ble.pseudo_addr, new_pseudo_addr, BD_ADDR_LEN);
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return TRUE;
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}
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#endif ///SMP_INCLUDED == TRUE
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return FALSE;
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}
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/*******************************************************************************
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**
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** Function btm_ble_addr_resolvable
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**
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** Description This function checks if a RPA is resolvable by the device key.
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**
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** Returns TRUE is resolvable; FALSE otherwise.
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**
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*******************************************************************************/
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BOOLEAN btm_ble_addr_resolvable (BD_ADDR rpa, tBTM_SEC_DEV_REC *p_dev_rec)
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{
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BOOLEAN rt = FALSE;
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#if (SMP_INCLUDED == TRUE)
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if (!BTM_BLE_IS_RESOLVE_BDA(rpa)) {
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return rt;
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}
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UINT8 rand[3];
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tSMP_ENC output;
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if ((p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) &&
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(p_dev_rec->ble.key_type & BTM_LE_KEY_PID)) {
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BTM_TRACE_DEBUG("%s try to resolve", __func__);
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/* use the 3 MSB of bd address as prand */
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rand[0] = rpa[2];
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rand[1] = rpa[1];
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rand[2] = rpa[0];
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/* generate X = E irk(R0, R1, R2) and R is random address 3 LSO */
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SMP_Encrypt(p_dev_rec->ble.keys.irk, BT_OCTET16_LEN,
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&rand[0], 3, &output);
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rand[0] = rpa[5];
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rand[1] = rpa[4];
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rand[2] = rpa[3];
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if (!memcmp(output.param_buf, &rand[0], 3)) {
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btm_ble_init_pseudo_addr (p_dev_rec, rpa);
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rt = TRUE;
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}
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}
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#endif ///SMP_INCLUDED == TRUE
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return rt;
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}
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#if (BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE)
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/*******************************************************************************
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**
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** Function btm_ble_match_random_bda
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**
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** Description This function match the random address to the appointed device
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** record, starting from calculating IRK. If record index exceed
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** the maximum record number, matching failed and send callback.
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**
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** Returns None.
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**
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*******************************************************************************/
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static BOOLEAN btm_ble_match_random_bda(UINT16 rec_index)
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{
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/* use the 3 MSB of bd address as prand */
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tBTM_LE_RANDOM_CB *p_mgnt_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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UINT8 rand[3];
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rand[0] = p_mgnt_cb->random_bda[2];
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rand[1] = p_mgnt_cb->random_bda[1];
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rand[2] = p_mgnt_cb->random_bda[0];
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BTM_TRACE_EVENT("%s rec_index = %d", __func__, rec_index);
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if (rec_index < BTM_SEC_MAX_DEVICE_RECORDS) {
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tSMP_ENC output;
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tBTM_SEC_DEV_REC *p_dev_rec;
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p_dev_rec = &btm_cb.sec_dev_rec[rec_index];
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BTM_TRACE_DEBUG("sec_flags = %02x device_type = %d", p_dev_rec->sec_flags,
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p_dev_rec->device_type);
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if ((p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) &&
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(p_dev_rec->ble.key_type & BTM_LE_KEY_PID)) {
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/* generate X = E irk(R0, R1, R2) and R is random address 3 LSO */
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SMP_Encrypt(p_dev_rec->ble.keys.irk, BT_OCTET16_LEN,
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&rand[0], 3, &output);
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return btm_ble_proc_resolve_x(&output);
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} else {
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// not completed
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return FALSE;
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}
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} else { /* no match found */
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btm_ble_resolve_address_cmpl();
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return TRUE;
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}
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}
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#endif ///BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
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/*******************************************************************************
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**
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** Function btm_ble_resolve_random_addr
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**
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** Description This function is called to resolve a random address.
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**
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** Returns pointer to the security record of the device whom a random
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** address is matched to.
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**
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*******************************************************************************/
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void btm_ble_resolve_random_addr(BD_ADDR random_bda, tBTM_BLE_RESOLVE_CBACK *p_cback, void *p)
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{
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#if (SMP_INCLUDED == TRUE)
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tBTM_LE_RANDOM_CB *p_mgnt_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
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BTM_TRACE_EVENT ("btm_ble_resolve_random_addr");
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if ( !p_mgnt_cb->busy) {
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p_mgnt_cb->p = p;
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p_mgnt_cb->busy = TRUE;
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p_mgnt_cb->index = 0;
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p_mgnt_cb->p_resolve_cback = p_cback;
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memcpy(p_mgnt_cb->random_bda, random_bda, BD_ADDR_LEN);
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/* start to resolve random address */
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/* check for next security record */
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while (TRUE) {
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if (btm_ble_match_random_bda(p_mgnt_cb->index)) {
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/* atch found or went through the list */
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break;
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}
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p_mgnt_cb->index ++;
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}
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} else {
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(*p_cback)(NULL, p);
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}
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#endif
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}
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/*******************************************************************************
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** address mapping between pseudo address and real connection address
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*******************************************************************************/
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/*******************************************************************************
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**
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** Function btm_find_dev_by_identity_addr
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**
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** Description find the security record whose LE static address is matching
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**
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*******************************************************************************/
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tBTM_SEC_DEV_REC *btm_find_dev_by_identity_addr(BD_ADDR bd_addr, UINT8 addr_type)
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{
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#if BLE_PRIVACY_SPT == TRUE
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UINT8 i;
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tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0];
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for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i ++, p_dev_rec ++) {
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if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) &&
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memcmp(p_dev_rec->ble.static_addr, bd_addr, BD_ADDR_LEN) == 0) {
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if ((p_dev_rec->ble.static_addr_type & (~BLE_ADDR_TYPE_ID_BIT)) !=
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(addr_type & (~BLE_ADDR_TYPE_ID_BIT))) {
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BTM_TRACE_WARNING("%s find pseudo->random match with diff addr type: %d vs %d",
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__func__, p_dev_rec->ble.static_addr_type, addr_type);
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}
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/* found the match */
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return p_dev_rec;
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}
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}
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#endif
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return NULL;
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}
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/*******************************************************************************
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**
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** Function btm_identity_addr_to_random_pseudo
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**
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** Description This function map a static BD address to a pseudo random address
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** in security database.
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**
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*******************************************************************************/
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BOOLEAN btm_identity_addr_to_random_pseudo(BD_ADDR bd_addr, UINT8 *p_addr_type, BOOLEAN refresh)
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{
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#if BLE_PRIVACY_SPT == TRUE
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tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_identity_addr(bd_addr, *p_addr_type);
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BTM_TRACE_EVENT ("%s", __func__);
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/* evt reported on static address, map static address to random pseudo */
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if (p_dev_rec != NULL) {
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/* if RPA offloading is supported, or 4.2 controller, do RPA refresh */
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if (refresh && controller_get_interface()->get_ble_resolving_list_max_size() != 0) {
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btm_ble_read_resolving_list_entry(p_dev_rec);
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}
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/* assign the original address to be the current report address */
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if (!btm_ble_init_pseudo_addr (p_dev_rec, bd_addr)) {
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memcpy(bd_addr, p_dev_rec->ble.pseudo_addr, BD_ADDR_LEN);
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}
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*p_addr_type = p_dev_rec->ble.ble_addr_type;
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return TRUE;
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}
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#endif
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return FALSE;
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|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function btm_random_pseudo_to_identity_addr
|
|
**
|
|
** Description This function map a random pseudo address to a public address
|
|
** random_pseudo is input and output parameter
|
|
**
|
|
*******************************************************************************/
|
|
BOOLEAN btm_random_pseudo_to_identity_addr(BD_ADDR random_pseudo, UINT8 *p_static_addr_type)
|
|
{
|
|
#if BLE_PRIVACY_SPT == TRUE
|
|
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (random_pseudo);
|
|
|
|
if (p_dev_rec != NULL) {
|
|
if (p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT) {
|
|
* p_static_addr_type = p_dev_rec->ble.static_addr_type;
|
|
memcpy(random_pseudo, p_dev_rec->ble.static_addr, BD_ADDR_LEN);
|
|
if (controller_get_interface()->supports_ble_privacy() && p_dev_rec->ble.ble_addr_type != BLE_ADDR_PUBLIC) {
|
|
*p_static_addr_type |= BLE_ADDR_TYPE_ID_BIT;
|
|
}
|
|
return TRUE;
|
|
}
|
|
}
|
|
#endif
|
|
return FALSE;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function btm_ble_refresh_peer_resolvable_private_addr
|
|
**
|
|
** Description This function refresh the currently used resolvable remote private address into security
|
|
** database and set active connection address.
|
|
**
|
|
*******************************************************************************/
|
|
void btm_ble_refresh_peer_resolvable_private_addr(BD_ADDR pseudo_bda, BD_ADDR rpa,
|
|
UINT8 rra_type)
|
|
{
|
|
#if BLE_PRIVACY_SPT == TRUE
|
|
UINT8 rra_dummy = FALSE;
|
|
BD_ADDR dummy_bda = {0};
|
|
|
|
if (memcmp(dummy_bda, rpa, BD_ADDR_LEN) == 0) {
|
|
rra_dummy = TRUE;
|
|
}
|
|
|
|
/* update security record here, in adv event or connection complete process */
|
|
tBTM_SEC_DEV_REC *p_sec_rec = btm_find_dev(pseudo_bda);
|
|
if (p_sec_rec != NULL) {
|
|
memcpy(p_sec_rec->ble.cur_rand_addr, rpa, BD_ADDR_LEN);
|
|
|
|
/* unknown, if dummy address, set to static */
|
|
if (rra_type == BTM_BLE_ADDR_PSEUDO) {
|
|
p_sec_rec->ble.active_addr_type = rra_dummy ? BTM_BLE_ADDR_STATIC : BTM_BLE_ADDR_RRA;
|
|
} else {
|
|
p_sec_rec->ble.active_addr_type = rra_type;
|
|
}
|
|
} else {
|
|
BTM_TRACE_ERROR("No matching known device in record");
|
|
return;
|
|
}
|
|
|
|
BTM_TRACE_DEBUG("%s: active_addr_type: %d ",
|
|
__func__, p_sec_rec->ble.active_addr_type);
|
|
|
|
/* connection refresh remote address */
|
|
tACL_CONN *p_acl = btm_bda_to_acl(p_sec_rec->bd_addr, BT_TRANSPORT_LE);
|
|
if (p_acl == NULL) {
|
|
p_acl = btm_bda_to_acl(p_sec_rec->ble.pseudo_addr, BT_TRANSPORT_LE);
|
|
}
|
|
|
|
if (p_acl != NULL) {
|
|
if (rra_type == BTM_BLE_ADDR_PSEUDO) {
|
|
/* use static address, resolvable_private_addr is empty */
|
|
if (rra_dummy) {
|
|
p_acl->active_remote_addr_type = p_sec_rec->ble.static_addr_type;
|
|
memcpy(p_acl->active_remote_addr, p_sec_rec->ble.static_addr, BD_ADDR_LEN);
|
|
} else {
|
|
p_acl->active_remote_addr_type = BLE_ADDR_RANDOM;
|
|
memcpy(p_acl->active_remote_addr, rpa, BD_ADDR_LEN);
|
|
}
|
|
} else {
|
|
p_acl->active_remote_addr_type = rra_type;
|
|
memcpy(p_acl->active_remote_addr, rpa, BD_ADDR_LEN);
|
|
}
|
|
|
|
BTM_TRACE_DEBUG("p_acl->active_remote_addr_type: %d ", p_acl->active_remote_addr_type);
|
|
BTM_TRACE_DEBUG("%s conn_addr: %02x:%02x:%02x:%02x:%02x:%02x",
|
|
__func__, p_acl->active_remote_addr[0], p_acl->active_remote_addr[1],
|
|
p_acl->active_remote_addr[2], p_acl->active_remote_addr[3],
|
|
p_acl->active_remote_addr[4], p_acl->active_remote_addr[5]);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
/*******************************************************************************
|
|
**
|
|
** Function btm_ble_refresh_local_resolvable_private_addr
|
|
**
|
|
** Description This function refresh the currently used resolvable private address for the
|
|
** active link to the remote device
|
|
**
|
|
*******************************************************************************/
|
|
void btm_ble_refresh_local_resolvable_private_addr(BD_ADDR pseudo_addr,
|
|
BD_ADDR local_rpa)
|
|
{
|
|
#if BLE_PRIVACY_SPT == TRUE
|
|
tACL_CONN *p = btm_bda_to_acl(pseudo_addr, BT_TRANSPORT_LE);
|
|
BD_ADDR dummy_bda = {0};
|
|
|
|
if (p != NULL) {
|
|
if (btm_cb.ble_ctr_cb.privacy_mode != BTM_PRIVACY_NONE) {
|
|
p->conn_addr_type = BLE_ADDR_RANDOM;
|
|
if (memcmp(local_rpa, dummy_bda, BD_ADDR_LEN)) {
|
|
memcpy(p->conn_addr, local_rpa, BD_ADDR_LEN);
|
|
} else {
|
|
memcpy(p->conn_addr, btm_cb.ble_ctr_cb.addr_mgnt_cb.private_addr, BD_ADDR_LEN);
|
|
}
|
|
} else {
|
|
p->conn_addr_type = BLE_ADDR_PUBLIC;
|
|
memcpy(p->conn_addr, &controller_get_interface()->get_address()->address, BD_ADDR_LEN);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
|