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esp-idf/components/bt/host/bluedroid/stack/btm/btm_dev.c
“YangZhao” 74f4d07c3b There is an issue that if the the btm_cb.p_sec_dev_rec_list is full,but at the same 
time we can't find old device to be replaced,then this can cause crash. So we need
to change the way to malloc the new device or replace the old in the list.
2022-01-04 11:09:44 +08:00

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/******************************************************************************
*
* Copyright (C) 1999-2012 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.
*
******************************************************************************/
/******************************************************************************
*
* This file contains functions for the Bluetooth Device Manager
*
******************************************************************************/
#include <stdlib.h>
#include <string.h>
//#include <stdio.h>
#include <stddef.h>
#include "stack/bt_types.h"
#include "device/controller.h"
#include "stack/hcimsgs.h"
#include "stack/btu.h"
#include "stack/btm_api.h"
#include "btm_int.h"
#include "stack/hcidefs.h"
#include "stack/l2c_api.h"
static tBTM_SEC_DEV_REC *btm_find_oldest_dev (void);
/*******************************************************************************
**
** Function BTM_SecAddDevice
**
** Description Add/modify device. This function will be normally called
** during host startup to restore all required information
** stored in the NVRAM.
**
** Parameters: bd_addr - BD address of the peer
** dev_class - Device Class
** bd_name - Name of the peer device. NULL if unknown.
** features - Remote device's features (up to 3 pages). NULL if not known
** trusted_mask - Bitwise OR of services that do not
** require authorization. (array of UINT32)
** link_key - Connection link key. NULL if unknown.
**
** Returns TRUE if added OK, else FALSE
**
*******************************************************************************/
BOOLEAN BTM_SecAddDevice (BD_ADDR bd_addr, DEV_CLASS dev_class, BD_NAME bd_name,
UINT8 *features, UINT32 trusted_mask[],
LINK_KEY link_key, UINT8 key_type, tBTM_IO_CAP io_cap,
UINT8 pin_length, UINT8 sc_support)
{
#if (SMP_INCLUDED == TRUE)
tBTM_SEC_DEV_REC *p_dev_rec;
int i, j;
BOOLEAN found = FALSE;
BTM_TRACE_API("%s, link key type:%x\n", __FUNCTION__, key_type);
p_dev_rec = btm_find_dev (bd_addr);
if (!p_dev_rec) {
/* There is no device record, allocate one.
* If we can not find an empty spot for this one, let it fail. */
if (list_length(btm_cb.p_sec_dev_rec_list) < BTM_SEC_MAX_DEVICE_RECORDS) {
p_dev_rec = (tBTM_SEC_DEV_REC *)osi_malloc(sizeof(tBTM_SEC_DEV_REC));
if(p_dev_rec) {
list_append(btm_cb.p_sec_dev_rec_list, p_dev_rec);
/* Mark this record as in use and initialize */
memset (p_dev_rec, 0, sizeof (tBTM_SEC_DEV_REC));
p_dev_rec->sec_flags = BTM_SEC_IN_USE;
memcpy (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN);
p_dev_rec->hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_BR_EDR);
p_dev_rec->ble_hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_LE);
#if BLE_INCLUDED == TRUE
/* use default value for background connection params */
/* update conn params, use default value for background connection params */
memset(&p_dev_rec->conn_params, 0xff, sizeof(tBTM_LE_CONN_PRAMS));
#endif
}
}
if (!p_dev_rec) {
return (FALSE);
}
}
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN; /* Default value */
p_dev_rec->timestamp = btm_cb.dev_rec_count++;
p_dev_rec->remote_secure_connection_previous_state = sc_support;
if (dev_class) {
memcpy (p_dev_rec->dev_class, dev_class, DEV_CLASS_LEN);
}
memset(p_dev_rec->sec_bd_name, 0, sizeof(tBTM_BD_NAME));
if (bd_name && bd_name[0]) {
p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN;
BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN);
}
p_dev_rec->num_read_pages = 0;
if (features) {
memcpy (p_dev_rec->features, features, sizeof (p_dev_rec->features));
for (i = HCI_EXT_FEATURES_PAGE_MAX; i >= 0; i--) {
for (j = 0; j < HCI_FEATURE_BYTES_PER_PAGE; j++) {
if (p_dev_rec->features[i][j] != 0) {
found = TRUE;
break;
}
}
if (found) {
p_dev_rec->num_read_pages = i + 1;
break;
}
}
} else {
memset (p_dev_rec->features, 0, sizeof (p_dev_rec->features));
}
BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask);
if (link_key) {
BTM_TRACE_EVENT ("BTM_SecAddDevice() BDA: %02x:%02x:%02x:%02x:%02x:%02x\n",
bd_addr[0], bd_addr[1], bd_addr[2],
bd_addr[3], bd_addr[4], bd_addr[5]);
p_dev_rec->sec_flags |= BTM_SEC_LINK_KEY_KNOWN;
memcpy (p_dev_rec->link_key, link_key, LINK_KEY_LEN);
p_dev_rec->link_key_type = key_type;
p_dev_rec->pin_code_length = pin_length;
if (pin_length >= 16 ||
key_type == BTM_LKEY_TYPE_AUTH_COMB ||
key_type == BTM_LKEY_TYPE_AUTH_COMB_P_256) {
// Set the fiag if the link key was made by using either a 16 digit
// pin or MITM.
p_dev_rec->sec_flags |= BTM_SEC_16_DIGIT_PIN_AUTHED;
}
}
#if defined(BTIF_MIXED_MODE_INCLUDED) && (BTIF_MIXED_MODE_INCLUDED == TRUE)
if (key_type < BTM_MAX_PRE_SM4_LKEY_TYPE) {
p_dev_rec->sm4 = BTM_SM4_KNOWN;
} else {
p_dev_rec->sm4 = BTM_SM4_TRUE;
}
#endif
p_dev_rec->rmt_io_caps = io_cap;
p_dev_rec->device_type |= BT_DEVICE_TYPE_BREDR;
#endif ///SMP_INCLUDED == TRUE
return (TRUE);
}
/*******************************************************************************
**
** Function BTM_SecDeleteDevice
**
** Description Free resources associated with the device.
**
** Parameters: bd_addr - BD address of the peer
** transport - BT_TRANSPORT_BR_EDR or BT_TRANSPORT_LE
**
** Returns TRUE if removed OK, FALSE if not found or ACL link is active
**
*******************************************************************************/
BOOLEAN BTM_SecDeleteDevice (BD_ADDR bd_addr, tBT_TRANSPORT transport)
{
tBTM_SEC_DEV_REC *p_dev_rec;
if (BTM_IsAclConnectionUp(bd_addr, transport)) {
BTM_TRACE_WARNING("%s FAILED: Cannot Delete when connection is active\n", __func__);
return FALSE;
}
if ((p_dev_rec = btm_find_dev(bd_addr)) != NULL) {
/* Tell controller to get rid of the link key, if it has one stored */
BTM_DeleteStoredLinkKey (p_dev_rec->bd_addr, NULL);
btm_sec_free_dev(p_dev_rec, transport);
}
return TRUE;
}
/*******************************************************************************
**
** Function BTM_SecClearSecurityFlags
**
** Description Reset the security flags (mark as not-paired) for a given
** remove device.
**
*******************************************************************************/
extern void BTM_SecClearSecurityFlags (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
return;
}
p_dev_rec->sec_flags = 0;
p_dev_rec->sec_state = BTM_SEC_STATE_IDLE;
p_dev_rec->sm4 = BTM_SM4_UNKNOWN;
}
/*******************************************************************************
**
** Function BTM_SecReadDevName
**
** Description Looks for the device name in the security database for the
** specified BD address.
**
** Returns Pointer to the name or NULL
**
*******************************************************************************/
char *BTM_SecReadDevName (BD_ADDR bd_addr)
{
char *p_name = NULL;
tBTM_SEC_DEV_REC *p_srec;
if ((p_srec = btm_find_dev(bd_addr)) != NULL) {
p_name = (char *)p_srec->sec_bd_name;
}
return (p_name);
}
/*******************************************************************************
**
** Function btm_find_sec_dev_in_list
**
** Description Look for the record in the device database for the record
** with specified address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
BOOLEAN btm_find_sec_dev_in_list (void *p_node_data, void *context)
{
tBTM_SEC_DEV_REC *p_sec_dev = (tBTM_SEC_DEV_REC *)p_node_data;
BOOLEAN ret = TRUE;
BOOLEAN dev_free = !(p_sec_dev->sec_flags & BTM_SEC_IN_USE);
tSecDevContext *p_context = (tSecDevContext *)context;
if (dev_free == p_context->free_check) {
switch (p_context->type) {
case SEC_DEV_BDA:
if (!memcmp(p_context->context.p_bd_addr, p_sec_dev->bd_addr, BD_ADDR_LEN)) {
ret = FALSE;
}
break;
case SEC_DEV_HDL:
if (p_context->context.handle == p_sec_dev->hci_handle
#if BLE_INCLUDED == TRUE
|| (p_context->context.handle == p_sec_dev->ble_hci_handle)
#endif
) {
ret = FALSE;
}
break;
#if BLE_PRIVACY_SPT == TRUE
case SEC_DEV_ID_ADDR:
if (!memcmp(p_context->context.p_bd_addr, p_sec_dev->ble.static_addr, BD_ADDR_LEN)) {
ret = FALSE;
}
break;
#endif //BLE_PRIVACY_SPT == TRUE
case SEC_DEV_BTDM_BDA:
if (!memcmp(p_context->context.p_bd_addr, p_sec_dev->bd_addr, BD_ADDR_LEN)) {
ret = FALSE;
}
#if BLE_INCLUDED == TRUE
// If a LE random address is looking for device record
if (!memcmp(p_sec_dev->ble.pseudo_addr, p_context->context.p_bd_addr, BD_ADDR_LEN)) {
ret = FALSE;
}
if (btm_ble_addr_resolvable(p_context->context.p_bd_addr, p_sec_dev)) {
ret = FALSE;
}
#endif
break;
default:
break;
}
}
return ret;
}
/*******************************************************************************
**
** Function btm_sec_alloc_dev
**
** Description Look for the record in the device database for the record
** with specified address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_sec_alloc_dev (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
tBTM_SEC_DEV_REC *p_dev_new_rec = NULL;
tBTM_SEC_DEV_REC *p_dev_old_rec = NULL;
tBTM_INQ_INFO *p_inq_info;
list_node_t *p_node = NULL;
BOOLEAN new_entry_found = FALSE;
BOOLEAN old_entry_found = FALSE;
BOOLEAN malloc_new_entry = FALSE;
BTM_TRACE_EVENT ("btm_sec_alloc_dev\n");
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
p_dev_old_rec = list_node(p_node);
/* look for old entry which match the bd_addr and the BTM_SEC_IN_USE is cleared */
if (!(p_dev_old_rec->sec_flags & BTM_SEC_IN_USE) &&
(!memcmp (p_dev_old_rec->bd_addr, bd_addr, BD_ADDR_LEN))) {
old_entry_found = TRUE;
BTM_TRACE_EVENT ("btm_sec_alloc_dev old device found\n");
break;
}
}
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
p_dev_new_rec = list_node(p_node);
/* find the first entry whose BTM_SEC_IN_USE is cleared */
if (!(p_dev_new_rec->sec_flags & BTM_SEC_IN_USE)) {
new_entry_found = TRUE;
break;
}
}
if (!new_entry_found) {
/* We can not find new device. We need malloc a new one if p_sec_dev_rec_list is not full */
if (list_length(btm_cb.p_sec_dev_rec_list) < BTM_SEC_MAX_DEVICE_RECORDS){
p_dev_new_rec = (tBTM_SEC_DEV_REC *)osi_malloc(sizeof(tBTM_SEC_DEV_REC));
if (p_dev_new_rec) {
new_entry_found = TRUE;
malloc_new_entry = TRUE;
} else {
return NULL;
}
}
}
if (!new_entry_found) {
p_dev_rec = btm_find_oldest_dev();
} else {
/* if the old device entry not present go with new entry */
if (old_entry_found) {
p_dev_rec = p_dev_old_rec;
if (malloc_new_entry) {
osi_free(p_dev_new_rec);
}
} else {
if (malloc_new_entry) {
list_append(btm_cb.p_sec_dev_rec_list, p_dev_new_rec);
}
p_dev_rec = p_dev_new_rec;
}
}
memset (p_dev_rec, 0, sizeof (tBTM_SEC_DEV_REC));
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN; /* Default value */
p_dev_rec->sec_flags = BTM_SEC_IN_USE;
/* Check with the BT manager if details about remote device are known */
/* outgoing connection */
if ((p_inq_info = BTM_InqDbRead(bd_addr)) != NULL) {
memcpy (p_dev_rec->dev_class, p_inq_info->results.dev_class, DEV_CLASS_LEN);
#if BLE_INCLUDED == TRUE
p_dev_rec->device_type = p_inq_info->results.device_type;
p_dev_rec->ble.ble_addr_type = p_inq_info->results.ble_addr_type;
/* update conn params, use default value for background connection params */
memset(&p_dev_rec->conn_params, 0xff, sizeof(tBTM_LE_CONN_PRAMS));
#endif
} else {
#if BLE_INCLUDED == TRUE
/* update conn params, use default value for background connection params */
memset(&p_dev_rec->conn_params, 0xff, sizeof(tBTM_LE_CONN_PRAMS));
#endif
if (!memcmp (bd_addr, btm_cb.connecting_bda, BD_ADDR_LEN)) {
memcpy (p_dev_rec->dev_class, btm_cb.connecting_dc, DEV_CLASS_LEN);
}
}
memcpy (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN);
#if BLE_INCLUDED == TRUE
p_dev_rec->ble_hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_LE);
#endif
p_dev_rec->hci_handle = BTM_GetHCIConnHandle (bd_addr, BT_TRANSPORT_BR_EDR);
p_dev_rec->timestamp = btm_cb.dev_rec_count++;
return (p_dev_rec);
}
/*******************************************************************************
**
** Function btm_sec_free_dev
**
** Description Mark device record as not used
**
*******************************************************************************/
void btm_sec_free_dev (tBTM_SEC_DEV_REC *p_dev_rec, tBT_TRANSPORT transport)
{
if (transport == BT_TRANSPORT_BR_EDR) {
memset(p_dev_rec->link_key, 0, LINK_KEY_LEN);
p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED
| BTM_SEC_ENCRYPTED | BTM_SEC_NAME_KNOWN
| BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LINK_KEY_AUTHED
| BTM_SEC_ROLE_SWITCHED | BTM_SEC_16_DIGIT_PIN_AUTHED);
} else if (transport == BT_TRANSPORT_LE) {
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN;
p_dev_rec->sec_flags &= ~(BTM_SEC_LE_AUTHENTICATED | BTM_SEC_LE_ENCRYPTED
| BTM_SEC_LE_NAME_KNOWN | BTM_SEC_LE_LINK_KEY_KNOWN
| BTM_SEC_LE_LINK_KEY_AUTHED | BTM_SEC_ROLE_SWITCHED);
#if BLE_INCLUDED == TRUE
/* Clear out any saved BLE keys */
btm_sec_clear_ble_keys (p_dev_rec);
#endif
} else {
p_dev_rec->bond_type = BOND_TYPE_UNKNOWN;
memset(p_dev_rec->link_key, 0, LINK_KEY_LEN);
p_dev_rec->sec_flags = 0;
#if BLE_INCLUDED == TRUE
/* Clear out any saved BLE keys */
btm_sec_clear_ble_keys (p_dev_rec);
#endif
}
/* No BLE keys and BT keys, clear the sec_flags */
if(p_dev_rec->sec_flags == BTM_SEC_IN_USE) {
p_dev_rec->sec_flags = 0;
}
list_remove(btm_cb.p_sec_dev_rec_list, p_dev_rec);
}
/*******************************************************************************
**
** Function btm_dev_support_switch
**
** Description This function is called by the L2CAP to check if remote
** device supports role switch
**
** Parameters: bd_addr - Address of the peer device
**
** Returns TRUE if device is known and role switch is supported
**
*******************************************************************************/
BOOLEAN btm_dev_support_switch (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec;
UINT8 xx;
BOOLEAN feature_empty = TRUE;
#if BTM_SCO_INCLUDED == TRUE
/* Role switch is not allowed if a SCO is up */
if (btm_is_sco_active_by_bdaddr(bd_addr)) {
return (FALSE);
}
#endif
p_dev_rec = btm_find_dev (bd_addr);
if (p_dev_rec && controller_get_interface()->supports_master_slave_role_switch()) {
if (HCI_SWITCH_SUPPORTED(p_dev_rec->features[HCI_EXT_FEATURES_PAGE_0])) {
BTM_TRACE_DEBUG("btm_dev_support_switch return TRUE (feature found)\n");
return (TRUE);
}
/* If the feature field is all zero, we never received them */
for (xx = 0 ; xx < BD_FEATURES_LEN ; xx++) {
if (p_dev_rec->features[HCI_EXT_FEATURES_PAGE_0][xx] != 0x00) {
feature_empty = FALSE; /* at least one is != 0 */
break;
}
}
/* If we don't know peer's capabilities, assume it supports Role-switch */
if (feature_empty) {
BTM_TRACE_DEBUG("btm_dev_support_switch return TRUE (feature empty)\n");
return (TRUE);
}
}
BTM_TRACE_DEBUG("btm_dev_support_switch return FALSE\n");
return (FALSE);
}
/*******************************************************************************
**
** Function btm_find_dev_by_handle
**
** Description Look for the record in the device database for the record
** with specified handle
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_dev_by_handle (UINT16 handle)
{
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
list_node_t *p_node = NULL;
tSecDevContext context;
context.type = SEC_DEV_HDL;
context.context.handle = handle;
context.free_check = FALSE;
p_node = list_foreach(btm_cb.p_sec_dev_rec_list, btm_find_sec_dev_in_list, &context);
if (p_node) {
p_dev_rec = list_node(p_node);
}
return (p_dev_rec);
}
/*******************************************************************************
**
** Function btm_find_dev
**
** Description Look for the record in the device database for the record
** with specified BD address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_dev(BD_ADDR bd_addr)
{
if(bd_addr) {
list_node_t *p_node = NULL;
tSecDevContext context;
context.type = SEC_DEV_BTDM_BDA;
context.context.p_bd_addr = bd_addr;
context.free_check = FALSE;
p_node = list_foreach(btm_cb.p_sec_dev_rec_list, btm_find_sec_dev_in_list, &context);
if (p_node) {
return(list_node(p_node));
}
}
return (NULL);
}
/*******************************************************************************
**
** Function btm_consolidate_dev
**
** Description combine security records if identified as same peer
**
** Returns none
**
*******************************************************************************/
void btm_consolidate_dev(tBTM_SEC_DEV_REC *p_target_rec)
{
#if BLE_INCLUDED == TRUE && SMP_INCLUDED == TRUE
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
tBTM_SEC_DEV_REC temp_rec = *p_target_rec;
list_node_t *p_node = NULL;
BTM_TRACE_DEBUG("%s\n", __func__);
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
p_dev_rec = list_node(p_node);
if (p_target_rec != p_dev_rec && p_dev_rec->sec_flags & BTM_SEC_IN_USE) {
if (!memcmp (p_dev_rec->bd_addr, p_target_rec->bd_addr, BD_ADDR_LEN)) {
memcpy(p_target_rec, p_dev_rec, sizeof(tBTM_SEC_DEV_REC));
p_target_rec->ble = temp_rec.ble;
p_target_rec->ble_hci_handle = temp_rec.ble_hci_handle;
p_target_rec->enc_key_size = temp_rec.enc_key_size;
p_target_rec->conn_params = temp_rec.conn_params;
p_target_rec->device_type |= temp_rec.device_type;
p_target_rec->sec_flags |= temp_rec.sec_flags;
p_target_rec->new_encryption_key_is_p256 = temp_rec.new_encryption_key_is_p256;
p_target_rec->no_smp_on_br = temp_rec.no_smp_on_br;
p_target_rec->bond_type = temp_rec.bond_type;
/* Remove the unused device from the list */
list_remove(btm_cb.p_sec_dev_rec_list, p_dev_rec);
break;
}
/* an RPA device entry is a duplicate of the target record */
if (btm_ble_addr_resolvable(p_dev_rec->bd_addr, p_target_rec)) {
if (memcmp(p_target_rec->ble.pseudo_addr, p_dev_rec->bd_addr, BD_ADDR_LEN) == 0) {
p_target_rec->ble.ble_addr_type = p_dev_rec->ble.ble_addr_type;
p_target_rec->device_type |= p_dev_rec->device_type;
/* Remove the unused device from the list */
list_remove(btm_cb.p_sec_dev_rec_list, p_dev_rec);
}
break;
}
}
}
#endif
}
/*******************************************************************************
**
** Function btm_find_or_alloc_dev
**
** Description Look for the record in the device database for the record
** with specified BD address
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_or_alloc_dev (BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec;
BTM_TRACE_EVENT ("btm_find_or_alloc_dev\n");
if ((p_dev_rec = btm_find_dev (bd_addr)) == NULL) {
/* Allocate a new device record or reuse the oldest one */
p_dev_rec = btm_sec_alloc_dev (bd_addr);
}
return (p_dev_rec);
}
/*******************************************************************************
**
** Function btm_find_oldest_dev
**
** Description Locates the oldest device in use. It first looks for
** the oldest non-paired device. If all devices are paired it
** deletes the oldest paired device.
**
** Returns Pointer to the record or NULL
**
*******************************************************************************/
tBTM_SEC_DEV_REC *btm_find_oldest_dev (void)
{
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
tBTM_SEC_DEV_REC *p_oldest = NULL;
list_node_t *p_node = NULL;
UINT32 ot = 0xFFFFFFFF;
/* First look for the non-paired devices for the oldest entry */
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
p_dev_rec = list_node(p_node);
if (((p_dev_rec->sec_flags & BTM_SEC_IN_USE) == 0)
|| ((p_dev_rec->sec_flags & (BTM_SEC_LINK_KEY_KNOWN | BTM_SEC_LE_LINK_KEY_KNOWN)) != 0)) {
continue; /* Device is paired so skip it */
}
if (p_dev_rec->timestamp < ot) {
p_oldest = p_dev_rec;
ot = p_dev_rec->timestamp;
}
}
if (ot != 0xFFFFFFFF) {
return (p_oldest);
}
/* All devices are paired; find the oldest */
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) == 0) {
continue;
}
if (p_dev_rec->timestamp < ot) {
p_oldest = p_dev_rec;
ot = p_dev_rec->timestamp;
}
}
return (p_oldest);
}
/*******************************************************************************
**
** Function btm_get_bond_type_dev
**
** Description Get the bond type for a device in the device database
** with specified BD address
**
** Returns The device bond type if known, otherwise BOND_TYPE_UNKNOWN
**
*******************************************************************************/
tBTM_BOND_TYPE btm_get_bond_type_dev(BD_ADDR bd_addr)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
return BOND_TYPE_UNKNOWN;
}
return p_dev_rec->bond_type;
}
/*******************************************************************************
**
** Function btm_set_bond_type_dev
**
** Description Set the bond type for a device in the device database
** with specified BD address
**
** Returns TRUE on success, otherwise FALSE
**
*******************************************************************************/
BOOLEAN btm_set_bond_type_dev(BD_ADDR bd_addr, tBTM_BOND_TYPE bond_type)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
if (p_dev_rec == NULL) {
return FALSE;
}
p_dev_rec->bond_type = bond_type;
return TRUE;
}
/*******************************************************************************
**
** Function btm_sec_dev_init
**
** Description Create new linked list for dynamic allocation on sec_dev_rec
**
*******************************************************************************/
void btm_sec_dev_init(void)
{
btm_cb.p_sec_dev_rec_list = list_new(osi_free_func);
}
/*******************************************************************************
**
** Function btm_sec_dev_free
**
** Description Delete sec_dev_rec list when btm_cb is being released
**
*******************************************************************************/
void btm_sec_dev_free(void)
{
list_free(btm_cb.p_sec_dev_rec_list);
}
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