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Diffstat (limited to 'stack/btm/btm_dev.c')
| -rw-r--r-- | stack/btm/btm_dev.c | 464 |
1 files changed, 464 insertions, 0 deletions
diff --git a/stack/btm/btm_dev.c b/stack/btm/btm_dev.c new file mode 100644 index 0000000..04994d1 --- /dev/null +++ b/stack/btm/btm_dev.c @@ -0,0 +1,464 @@ +/****************************************************************************** + * + * 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 "bt_types.h" +#include "gki.h" +#include "hcimsgs.h" +#include "btu.h" +#include "btm_api.h" +#include "btm_int.h" +#include "hcidefs.h" +#include "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 supported features. 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, + BD_FEATURES features, UINT32 trusted_mask[], + LINK_KEY link_key, UINT8 key_type, tBTM_IO_CAP io_cap) +{ + tBTM_SEC_DEV_REC *p_dev_rec; + int i; + + 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. */ + for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++) + { + if (!(btm_cb.sec_dev_rec[i].sec_flags & BTM_SEC_IN_USE)) + { + p_dev_rec = &btm_cb.sec_dev_rec[i]; + + /* 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); + +#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 + break; + } + } + + if (!p_dev_rec) + return(FALSE); + } + + p_dev_rec->timestamp = btm_cb.dev_rec_count++; + + 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, sizeof (p_dev_rec->sec_bd_name), + (char *)bd_name, BTM_MAX_REM_BD_NAME_LEN); + } + + if (features) + memcpy (p_dev_rec->features, features, sizeof (BD_FEATURES)); + else + memset (p_dev_rec->features, 0, sizeof (BD_FEATURES)); + + BTM_SEC_COPY_TRUSTED_DEVICE(trusted_mask, p_dev_rec->trusted_mask); + + if (link_key) + { + BTM_TRACE_EVENT6 ("BTM_SecAddDevice() BDA: %02x:%02x:%02x:%02x:%02x:%02x", + 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; + } + +#if defined(BTIF_MIXED_MODE_INCLUDED) && (BTIF_MIXED_MODE_INCLUDED == TRUE) + p_dev_rec->sm4 = BTM_SM4_KNOWN; +#endif + + p_dev_rec->rmt_io_caps = io_cap; + + return(TRUE); +} + + +/******************************************************************************* +** +** Function BTM_SecDeleteDevice +** +** Description Free resources associated with the device. +** +** Parameters: bd_addr - BD address of the peer +** +** Returns TRUE if removed OK, FALSE if not found or ACL link is active +** +*******************************************************************************/ +BOOLEAN BTM_SecDeleteDevice (BD_ADDR bd_addr) +{ + tBTM_SEC_DEV_REC *p_dev_rec; + + if (BTM_IsAclConnectionUp(bd_addr)) + { + BTM_TRACE_WARNING0("BTM_SecDeleteDevice FAILED: Cannot Delete when connection is active"); + return(FALSE); + } + + if ((p_dev_rec = btm_find_dev (bd_addr)) == NULL) + return(FALSE); + + btm_sec_free_dev (p_dev_rec); + + /* Tell controller to get rid of the link key if it has one stored */ + BTM_DeleteStoredLinkKey (bd_addr, NULL); + + return(TRUE); +} + +/******************************************************************************* +** +** 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_sec_alloc_dev +** +** 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_sec_alloc_dev (BD_ADDR bd_addr) +{ + tBTM_SEC_DEV_REC *p_dev_rec = NULL; + tBTM_INQ_INFO *p_inq_info; + int i; + BTM_TRACE_EVENT0 ("btm_sec_alloc_dev"); + for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++) + { + if (!(btm_cb.sec_dev_rec[i].sec_flags & BTM_SEC_IN_USE)) + { + p_dev_rec = &btm_cb.sec_dev_rec[i]; + break; + } + } + + if (!p_dev_rec) + p_dev_rec = btm_find_oldest_dev(); + + memset (p_dev_rec, 0, sizeof (tBTM_SEC_DEV_REC)); + + 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 + +#if BTM_INQ_GET_REMOTE_NAME == TRUE + if (p_inq_info->remote_name_state == BTM_INQ_RMT_NAME_DONE) + { + BCM_STRNCPY_S ((char *)p_dev_rec->sec_bd_name, sizeof (p_dev_rec->sec_bd_name), + (char *)p_inq_info->remote_name, BTM_MAX_REM_BD_NAME_LEN); + p_dev_rec->sec_flags |= BTM_SEC_NAME_KNOWN; + } +#endif + } + else + { +#if BLE_INCLUDED == TRUE + p_dev_rec->device_type = BT_DEVICE_TYPE_BREDR; /* initialize it as BR/EDR device */ + /* 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); + + p_dev_rec->hci_handle = BTM_GetHCIConnHandle (bd_addr); + 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) +{ + 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 + + +} + +/******************************************************************************* +** +** 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 && HCI_SWITCH_SUPPORTED(btm_cb.devcb.local_features)) + { + if (HCI_SWITCH_SUPPORTED(p_dev_rec->features)) + { + BTM_TRACE_DEBUG0("btm_dev_support_switch return TRUE (feature found)"); + 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[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_DEBUG0("btm_dev_support_switch return TRUE (feature empty)"); + return (TRUE); + } + } + + BTM_TRACE_DEBUG0("btm_dev_support_switch return FALSE"); + 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 = &btm_cb.sec_dev_rec[0]; + int i; + + for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) + { + if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) + && (p_dev_rec->hci_handle == handle)) + return(p_dev_rec); + } + return(NULL); +} + +/******************************************************************************* +** +** 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) +{ + tBTM_SEC_DEV_REC *p_dev_rec = &btm_cb.sec_dev_rec[0]; + int i; + + if (bd_addr) + { + for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) + { + if ((p_dev_rec->sec_flags & BTM_SEC_IN_USE) + && (!memcmp (p_dev_rec->bd_addr, bd_addr, BD_ADDR_LEN))) + return(p_dev_rec); + } + } + return(NULL); +} + +/******************************************************************************* +** +** 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_EVENT0 ("btm_find_or_alloc_dev"); + 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 = &btm_cb.sec_dev_rec[0]; + tBTM_SEC_DEV_REC *p_oldest = p_dev_rec; + UINT32 ot = 0xFFFFFFFF; + int i; + + /* First look for the non-paired devices for the oldest entry */ + for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) + { + if (((p_dev_rec->sec_flags & BTM_SEC_IN_USE) == 0) + || ((p_dev_rec->sec_flags & BTM_SEC_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 */ + p_dev_rec = &btm_cb.sec_dev_rec[0]; + for (i = 0; i < BTM_SEC_MAX_DEVICE_RECORDS; i++, p_dev_rec++) + { + 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); +} + + |