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esp-idf/components/bt/bluedroid/stack/btm/btm_acl.c
Chinmay Chhajed 99d572700d Bluedroid: Authentication fixes in Legacy and Secure Connection. 
Prevent a remote device from doing a Bluetooth Impersonation Attack
(BIAS) by:

- Preventing remote device to downgrade secure connection
feature mask. Secure connection feature mask should remain same or
increase to enabled in link key generation and authentication.

- Doing a mutual authentication during Legacy Authentication.
2020-06-25 13:59:14 +00:00

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/******************************************************************************
*
* Copyright (C) 2000-2012 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.
*
******************************************************************************/
/*****************************************************************************
**
** Name: btm_acl.c
**
** Description: This file contains functions that handle ACL connections.
** This includes operations such as hold and sniff modes,
** supported packet types.
**
** This module contains both internal and external (API)
** functions. External (API) functions are distinguishable
** by their names beginning with uppercase BTM.
**
**
******************************************************************************/
#include <stdlib.h>
#include <string.h>
//#include <stdio.h>
#include <stddef.h>
#include "stack/bt_types.h"
#include "common/bt_target.h"
#include "device/controller.h"
#include "stack/hcimsgs.h"
#include "stack/btu.h"
#include "stack/btm_api.h"
#include "btm_int.h"
#include "l2c_int.h"
#include "stack/hcidefs.h"
//#include "bt_utils.h"
static void btm_read_remote_features (UINT16 handle);
static void btm_read_remote_ext_features (UINT16 handle, UINT8 page_number);
static void btm_process_remote_ext_features (tACL_CONN *p_acl_cb, UINT8 num_read_pages);
#define BTM_DEV_REPLY_TIMEOUT 3 /* 3 second timeout waiting for responses */
/*******************************************************************************
**
** Function btm_acl_init
**
** Description This function is called at BTM startup to initialize
**
** Returns void
**
*******************************************************************************/
void btm_acl_init (void)
{
BTM_TRACE_DEBUG ("btm_acl_init\n");
#if 0 /* cleared in btm_init; put back in if called from anywhere else! */
memset (&btm_cb.acl_db, 0, sizeof (btm_cb.acl_db));
memset (btm_cb.btm_scn, 0, BTM_MAX_SCN); /* Initialize the SCN usage to FALSE */
btm_cb.btm_def_link_policy = 0;
btm_cb.p_bl_changed_cb = NULL;
#endif
/* Initialize nonzero defaults */
btm_cb.btm_def_link_super_tout = HCI_DEFAULT_INACT_TOUT;
btm_cb.acl_disc_reason = 0xff ;
}
/*******************************************************************************
**
** Function btm_bda_to_acl
**
** Description This function returns the FIRST acl_db entry for the passed BDA.
**
** Parameters bda : BD address of the remote device
** transport : Physical transport used for ACL connection (BR/EDR or LE)
**
** Returns Returns pointer to the ACL DB for the requested BDA if found.
** NULL if not found.
**
*******************************************************************************/
tACL_CONN *btm_bda_to_acl (BD_ADDR bda, tBT_TRANSPORT transport)
{
tACL_CONN *p = &btm_cb.acl_db[0];
UINT16 xx;
if (bda) {
for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
if ((p->in_use) && (!memcmp (p->remote_addr, bda, BD_ADDR_LEN))
#if BLE_INCLUDED == TRUE
&& p->transport == transport
#endif
) {
BTM_TRACE_DEBUG ("btm_bda_to_acl found\n");
return (p);
}
}
}
/* If here, no BD Addr found */
return ((tACL_CONN *)NULL);
}
/*******************************************************************************
**
** Function btm_handle_to_acl_index
**
** Description This function returns the FIRST acl_db entry for the passed hci_handle.
**
** Returns index to the acl_db or MAX_L2CAP_LINKS.
**
*******************************************************************************/
UINT8 btm_handle_to_acl_index (UINT16 hci_handle)
{
tACL_CONN *p = &btm_cb.acl_db[0];
UINT8 xx;
BTM_TRACE_DEBUG ("btm_handle_to_acl_index\n");
for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
if ((p->in_use) && (p->hci_handle == hci_handle)) {
break;
}
}
/* If here, no BD Addr found */
return (xx);
}
/*******************************************************************************
**
** Function btm_handle_to_acl
**
** Description This function returns the FIRST acl_db entry for the passed hci_handle.
**
** Returns Returns pointer to the ACL DB for the requested BDA if found.
** NULL if not found.
**
*******************************************************************************/
tACL_CONN *btm_handle_to_acl (UINT16 hci_handle)
{
tACL_CONN *p = &btm_cb.acl_db[0];
UINT8 xx;
BTM_TRACE_DEBUG ("btm_handle_to_acl_index\n");
for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
if ((p->in_use) && (p->hci_handle == hci_handle)) {
return(p);
}
}
/* If here, no BD Addr found */
return ((tACL_CONN *)NULL);
}
#if BLE_PRIVACY_SPT == TRUE
/*******************************************************************************
**
** Function btm_ble_get_acl_remote_addr
**
** Description This function reads the active remote address used for the
** connection.
**
** Returns success return TRUE, otherwise FALSE.
**
*******************************************************************************/
BOOLEAN btm_ble_get_acl_remote_addr(tBTM_SEC_DEV_REC *p_dev_rec, BD_ADDR conn_addr,
tBLE_ADDR_TYPE *p_addr_type)
{
#if BLE_INCLUDED == TRUE
BOOLEAN st = TRUE;
if (p_dev_rec == NULL) {
BTM_TRACE_ERROR("btm_ble_get_acl_remote_addr can not find device with matching address\n");
return FALSE;
}
switch (p_dev_rec->ble.active_addr_type) {
case BTM_BLE_ADDR_PSEUDO:
memcpy(conn_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
* p_addr_type = p_dev_rec->ble.ble_addr_type;
break;
case BTM_BLE_ADDR_RRA:
memcpy(conn_addr, p_dev_rec->ble.cur_rand_addr, BD_ADDR_LEN);
* p_addr_type = BLE_ADDR_RANDOM;
break;
case BTM_BLE_ADDR_STATIC:
memcpy(conn_addr, p_dev_rec->ble.static_addr, BD_ADDR_LEN);
* p_addr_type = p_dev_rec->ble.static_addr_type;
break;
default:
BTM_TRACE_ERROR("Unknown active address: %d\n", p_dev_rec->ble.active_addr_type);
st = FALSE;
break;
}
return st;
#else
UNUSED(p_dev_rec);
UNUSED(conn_addr);
UNUSED(p_addr_type);
return FALSE;
#endif
}
#endif
/*******************************************************************************
**
** Function btm_acl_created
**
** Description This function is called by L2CAP when an ACL connection
** is created.
**
** Returns void
**
*******************************************************************************/
void btm_acl_created (BD_ADDR bda, DEV_CLASS dc, BD_NAME bdn,
UINT16 hci_handle, UINT8 link_role, tBT_TRANSPORT transport)
{
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
tACL_CONN *p;
UINT8 xx;
BTM_TRACE_DEBUG ("btm_acl_created hci_handle=%d link_role=%d transport=%d\n",
hci_handle, link_role, transport);
/* Ensure we don't have duplicates */
p = btm_bda_to_acl(bda, transport);
if (p != (tACL_CONN *)NULL) {
p->hci_handle = hci_handle;
p->link_role = link_role;
#if BLE_INCLUDED == TRUE
p->transport = transport;
#endif
BTM_TRACE_DEBUG ("Duplicate btm_acl_created: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
BTM_SetLinkPolicy(p->remote_addr, &btm_cb.btm_def_link_policy);
return;
}
/* Allocate acl_db entry */
for (xx = 0, p = &btm_cb.acl_db[0]; xx < MAX_L2CAP_LINKS; xx++, p++) {
if (!p->in_use) {
p->in_use = TRUE;
p->hci_handle = hci_handle;
p->link_role = link_role;
p->link_up_issued = FALSE;
memcpy (p->remote_addr, bda, BD_ADDR_LEN);
/* Set the default version of the peer device to version4.0 before exchange the version with it.
If the peer device act as a master and don't exchange the version with us, then it can only use the
legacy connect instead of secure connection in the pairing step. */
p->lmp_version = HCI_PROTO_VERSION_4_0;
#if BLE_INCLUDED == TRUE
p->transport = transport;
#if BLE_PRIVACY_SPT == TRUE
if (transport == BT_TRANSPORT_LE) {
btm_ble_refresh_local_resolvable_private_addr(bda,
btm_cb.ble_ctr_cb.addr_mgnt_cb.private_addr);
}
#else
p->conn_addr_type = BLE_ADDR_PUBLIC;
memcpy(p->conn_addr, &controller_get_interface()->get_address()->address, BD_ADDR_LEN);
BTM_TRACE_DEBUG ("conn_addr: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
p->conn_addr[0], p->conn_addr[1], p->conn_addr[2], p->conn_addr[3], p->conn_addr[4], p->conn_addr[5]);
#endif
#endif
p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
btm_pm_sm_alloc(xx);
#if (CLASSIC_BT_INCLUDED == TRUE)
btm_sec_update_legacy_auth_state(p, BTM_ACL_LEGACY_AUTH_NONE);
#endif
if (dc) {
memcpy (p->remote_dc, dc, DEV_CLASS_LEN);
}
if (bdn) {
memcpy (p->remote_name, bdn, BTM_MAX_REM_BD_NAME_LEN);
}
/* if BR/EDR do something more */
if (transport == BT_TRANSPORT_BR_EDR) {
btsnd_hcic_read_rmt_clk_offset (p->hci_handle);
btsnd_hcic_rmt_ver_req (p->hci_handle);
}
p_dev_rec = btm_find_dev_by_handle (hci_handle);
#if (BLE_INCLUDED == TRUE)
if (p_dev_rec ) {
BTM_TRACE_DEBUG ("device_type=0x%x\n", p_dev_rec->device_type);
}
#endif
if (p_dev_rec && !(transport == BT_TRANSPORT_LE)) {
if (!p_dev_rec->remote_secure_connection_previous_state) {
/* If remote features already known, copy them and continue connection setup */
if ((p_dev_rec->num_read_pages) &&
(p_dev_rec->num_read_pages <= (HCI_EXT_FEATURES_PAGE_MAX + 1))) {
memcpy (p->peer_lmp_features, p_dev_rec->features,
(HCI_FEATURE_BYTES_PER_PAGE * p_dev_rec->num_read_pages));
p->num_read_pages = p_dev_rec->num_read_pages;
#if (CLASSIC_BT_INCLUDED == TRUE)
const UINT8 req_pend = (p_dev_rec->sm4 & BTM_SM4_REQ_PEND);
#endif ///CLASSIC_BT_INCLUDED == TRUE
/* Store the Peer Security Capabilites (in SM4 and rmt_sec_caps) */
#if (SMP_INCLUDED == TRUE)
btm_sec_set_peer_sec_caps(p, p_dev_rec);
#endif ///SMP_INCLUDED == TRUE
#if (CLASSIC_BT_INCLUDED == TRUE)
BTM_TRACE_API("%s: pend:%d\n", __FUNCTION__, req_pend);
if (req_pend) {
/* Request for remaining Security Features (if any) */
l2cu_resubmit_pending_sec_req (p_dev_rec->bd_addr);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
btm_establish_continue (p);
return;
}
} else {
/* If remote features indicated secure connection (SC) mode, check the remote feautres again*/
/* this is to prevent from BIAS attack where attacker can downgrade SC mode*/
btm_read_remote_features (p->hci_handle);
}
}
#if (BLE_INCLUDED == TRUE)
/* If here, features are not known yet */
if (p_dev_rec && transport == BT_TRANSPORT_LE) {
#if BLE_PRIVACY_SPT == TRUE
btm_ble_get_acl_remote_addr (p_dev_rec, p->active_remote_addr,
&p->active_remote_addr_type);
#endif
if (link_role == HCI_ROLE_MASTER) {
btsnd_hcic_ble_read_remote_feat(p->hci_handle);
} else if (HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(controller_get_interface()->get_features_ble()->as_array)
&& link_role == HCI_ROLE_SLAVE) {
btsnd_hcic_rmt_ver_req (p->hci_handle);
} else {
btm_establish_continue(p);
}
} else
#endif
{
btm_read_remote_features (p->hci_handle);
}
/* read page 1 - on rmt feature event for buffer reasons */
return;
}
}
}
/*******************************************************************************
**
** Function btm_acl_report_role_change
**
** Description This function is called when the local device is deemed
** to be down. It notifies L2CAP of the failure.
**
** Returns void
**
*******************************************************************************/
void btm_acl_report_role_change (UINT8 hci_status, BD_ADDR bda)
{
tBTM_ROLE_SWITCH_CMPL ref_data;
BTM_TRACE_DEBUG ("btm_acl_report_role_change\n");
if (btm_cb.devcb.p_switch_role_cb
&& (bda && (0 == memcmp(btm_cb.devcb.switch_role_ref_data.remote_bd_addr, bda, BD_ADDR_LEN)))) {
memcpy (&ref_data, &btm_cb.devcb.switch_role_ref_data, sizeof(tBTM_ROLE_SWITCH_CMPL));
ref_data.hci_status = hci_status;
(*btm_cb.devcb.p_switch_role_cb)(&ref_data);
memset (&btm_cb.devcb.switch_role_ref_data, 0, sizeof(tBTM_ROLE_SWITCH_CMPL));
btm_cb.devcb.p_switch_role_cb = NULL;
}
}
/*******************************************************************************
**
** Function btm_acl_removed
**
** Description This function is called by L2CAP when an ACL connection
** is removed. Since only L2CAP creates ACL links, we use
** the L2CAP link index as our index into the control blocks.
**
** Returns void
**
*******************************************************************************/
void btm_acl_removed (BD_ADDR bda, tBT_TRANSPORT transport)
{
tACL_CONN *p;
tBTM_BL_EVENT_DATA evt_data;
#if (defined BLE_INCLUDED && BLE_INCLUDED == TRUE)
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
#endif
BTM_TRACE_DEBUG ("btm_acl_removed\n");
p = btm_bda_to_acl(bda, transport);
if (p != (tACL_CONN *)NULL) {
p->in_use = FALSE;
/* if the disconnected channel has a pending role switch, clear it now */
btm_acl_report_role_change(HCI_ERR_NO_CONNECTION, bda);
/* Only notify if link up has had a chance to be issued */
if (p->link_up_issued) {
p->link_up_issued = FALSE;
/* If anyone cares, tell him database changed */
if (btm_cb.p_bl_changed_cb) {
evt_data.event = BTM_BL_DISCN_EVT;
evt_data.discn.p_bda = bda;
#if BLE_INCLUDED == TRUE
evt_data.discn.handle = p->hci_handle;
evt_data.discn.transport = p->transport;
#endif
(*btm_cb.p_bl_changed_cb)(&evt_data);
}
btm_acl_update_busy_level (BTM_BLI_ACL_DOWN_EVT);
}
#if (defined BLE_INCLUDED && BLE_INCLUDED == TRUE)
BTM_TRACE_DEBUG ("acl hci_handle=%d transport=%d connectable_mode=0x%0x link_role=%d\n",
p->hci_handle,
p->transport,
btm_cb.ble_ctr_cb.inq_var.connectable_mode,
p->link_role);
p_dev_rec = btm_find_dev(bda);
if ( p_dev_rec) {
BTM_TRACE_DEBUG("before update p_dev_rec->sec_flags=0x%x\n", p_dev_rec->sec_flags);
if (p->transport == BT_TRANSPORT_LE) {
BTM_TRACE_DEBUG("LE link down\n");
p_dev_rec->sec_flags &= ~(BTM_SEC_LE_ENCRYPTED | BTM_SEC_ROLE_SWITCHED);
if ( (p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN) == 0) {
BTM_TRACE_DEBUG("Not Bonded\n");
p_dev_rec->sec_flags &= ~(BTM_SEC_LE_LINK_KEY_AUTHED | BTM_SEC_LE_AUTHENTICATED);
} else {
BTM_TRACE_DEBUG("Bonded\n");
}
} else {
BTM_TRACE_DEBUG("Bletooth link down\n");
p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED
| BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED);
}
BTM_TRACE_DEBUG("after update p_dev_rec->sec_flags=0x%x\n", p_dev_rec->sec_flags);
} else {
BTM_TRACE_ERROR("Device not found\n");
}
#endif
/* Clear the ACL connection data */
memset(p, 0, sizeof(tACL_CONN));
}
}
/*******************************************************************************
**
** Function btm_acl_device_down
**
** Description This function is called when the local device is deemed
** to be down. It notifies L2CAP of the failure.
**
** Returns void
**
*******************************************************************************/
void btm_acl_device_down (void)
{
tACL_CONN *p = &btm_cb.acl_db[0];
UINT16 xx;
BTM_TRACE_DEBUG ("btm_acl_device_down\n");
for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
if (p->in_use) {
BTM_TRACE_DEBUG ("hci_handle=%d HCI_ERR_HW_FAILURE \n", p->hci_handle );
l2c_link_hci_disc_comp (p->hci_handle, HCI_ERR_HW_FAILURE);
}
}
}
/*******************************************************************************
**
** Function btm_acl_update_busy_level
**
** Description This function is called to update the busy level of the system
** .
**
** Returns void
**
*******************************************************************************/
void btm_acl_update_busy_level (tBTM_BLI_EVENT event)
{
tBTM_BL_UPDATE_DATA evt;
UINT8 busy_level;
BTM_TRACE_DEBUG ("btm_acl_update_busy_level\n");
BOOLEAN old_inquiry_state = btm_cb.is_inquiry;
switch (event) {
case BTM_BLI_ACL_UP_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_ACL_UP_EVT\n");
break;
case BTM_BLI_ACL_DOWN_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_ACL_DOWN_EVT\n");
break;
case BTM_BLI_PAGE_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_PAGE_EVT\n");
btm_cb.is_paging = TRUE;
evt.busy_level_flags = BTM_BL_PAGING_STARTED;
break;
case BTM_BLI_PAGE_DONE_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_PAGE_DONE_EVT\n");
btm_cb.is_paging = FALSE;
evt.busy_level_flags = BTM_BL_PAGING_COMPLETE;
break;
case BTM_BLI_INQ_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_INQ_EVT\n");
btm_cb.is_inquiry = TRUE;
evt.busy_level_flags = BTM_BL_INQUIRY_STARTED;
break;
case BTM_BLI_INQ_CANCEL_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_INQ_CANCEL_EVT\n");
btm_cb.is_inquiry = FALSE;
evt.busy_level_flags = BTM_BL_INQUIRY_CANCELLED;
break;
case BTM_BLI_INQ_DONE_EVT:
BTM_TRACE_DEBUG ("BTM_BLI_INQ_DONE_EVT\n");
btm_cb.is_inquiry = FALSE;
evt.busy_level_flags = BTM_BL_INQUIRY_COMPLETE;
break;
}
if (btm_cb.is_paging || btm_cb.is_inquiry) {
busy_level = 10;
} else {
busy_level = BTM_GetNumAclLinks();
}
if ((busy_level != btm_cb.busy_level) || (old_inquiry_state != btm_cb.is_inquiry)) {
evt.event = BTM_BL_UPDATE_EVT;
evt.busy_level = busy_level;
btm_cb.busy_level = busy_level;
if (btm_cb.p_bl_changed_cb && (btm_cb.bl_evt_mask & BTM_BL_UPDATE_MASK)) {
(*btm_cb.p_bl_changed_cb)((tBTM_BL_EVENT_DATA *)&evt);
}
}
}
/*******************************************************************************
**
** Function BTM_GetRole
**
** Description This function is called to get the role of the local device
** for the ACL connection with the specified remote device
**
** Returns BTM_SUCCESS if connection exists.
** BTM_UNKNOWN_ADDR if no active link with bd addr specified
**
*******************************************************************************/
tBTM_STATUS BTM_GetRole (BD_ADDR remote_bd_addr, UINT8 *p_role)
{
tACL_CONN *p;
BTM_TRACE_DEBUG ("BTM_GetRole\n");
if ((p = btm_bda_to_acl(remote_bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
*p_role = BTM_ROLE_UNDEFINED;
return (BTM_UNKNOWN_ADDR);
}
/* Get the current role */
*p_role = p->link_role;
return (BTM_SUCCESS);
}
/*******************************************************************************
**
** Function BTM_SwitchRole
**
** Description This function is called to switch role between master and
** slave. If role is already set it will do nothing. If the
** command was initiated, the callback function is called upon
** completion.
**
** Returns BTM_SUCCESS if already in specified role.
** BTM_CMD_STARTED if command issued to controller.
** BTM_NO_RESOURCES if couldn't allocate memory to issue command
** BTM_UNKNOWN_ADDR if no active link with bd addr specified
** BTM_MODE_UNSUPPORTED if local device does not support role switching
** BTM_BUSY if the previous command is not completed
**
*******************************************************************************/
tBTM_STATUS BTM_SwitchRole (BD_ADDR remote_bd_addr, UINT8 new_role, tBTM_CMPL_CB *p_cb)
{
tACL_CONN *p;
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
#if BTM_SCO_INCLUDED == TRUE
BOOLEAN is_sco_active;
#endif
tBTM_STATUS status;
tBTM_PM_MODE pwr_mode;
tBTM_PM_PWR_MD settings;
#if (BT_USE_TRACES == TRUE)
BD_ADDR_PTR p_bda;
#endif
BTM_TRACE_API ("BTM_SwitchRole BDA: %02x-%02x-%02x-%02x-%02x-%02x\n",
remote_bd_addr[0], remote_bd_addr[1], remote_bd_addr[2],
remote_bd_addr[3], remote_bd_addr[4], remote_bd_addr[5]);
/* Make sure the local device supports switching */
if (!controller_get_interface()->supports_master_slave_role_switch()) {
return (BTM_MODE_UNSUPPORTED);
}
if (btm_cb.devcb.p_switch_role_cb && p_cb) {
#if (BT_USE_TRACES == TRUE)
p_bda = btm_cb.devcb.switch_role_ref_data.remote_bd_addr;
BTM_TRACE_DEBUG ("Role switch on other device is in progress 0x%02x%02x%02x%02x%02x%02x\n",
p_bda[0], p_bda[1], p_bda[2],
p_bda[3], p_bda[4], p_bda[5]);
#endif
return (BTM_BUSY);
}
if ((p = btm_bda_to_acl(remote_bd_addr, BT_TRANSPORT_BR_EDR)) == NULL) {
return (BTM_UNKNOWN_ADDR);
}
/* Finished if already in desired role */
if (p->link_role == new_role) {
return (BTM_SUCCESS);
}
#if BTM_SCO_INCLUDED == TRUE
/* Check if there is any SCO Active on this BD Address */
is_sco_active = btm_is_sco_active_by_bdaddr(remote_bd_addr);
if (is_sco_active == TRUE) {
return (BTM_NO_RESOURCES);
}
#endif
/* Ignore role switch request if the previous request was not completed */
if (p->switch_role_state != BTM_ACL_SWKEY_STATE_IDLE) {
BTM_TRACE_DEBUG ("BTM_SwitchRole busy: %d\n",
p->switch_role_state);
return (BTM_BUSY);
}
if ((status = BTM_ReadPowerMode(p->remote_addr, &pwr_mode)) != BTM_SUCCESS) {
return (status);
}
/* Wake up the link if in sniff or park before attempting switch */
if (pwr_mode == BTM_PM_MD_PARK || pwr_mode == BTM_PM_MD_SNIFF) {
memset( (void *)&settings, 0, sizeof(settings));
settings.mode = BTM_PM_MD_ACTIVE;
status = BTM_SetPowerMode (BTM_PM_SET_ONLY_ID, p->remote_addr, &settings);
if (status != BTM_CMD_STARTED) {
return (BTM_WRONG_MODE);
}
p->switch_role_state = BTM_ACL_SWKEY_STATE_MODE_CHANGE;
}
/* some devices do not support switch while encryption is on */
else {
p_dev_rec = btm_find_dev (remote_bd_addr);
if ((p_dev_rec != NULL)
&& ((p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) != 0)
&& !BTM_EPR_AVAILABLE(p)) {
/* bypass turning off encryption if change link key is already doing it */
if (p->encrypt_state != BTM_ACL_ENCRYPT_STATE_ENCRYPT_OFF) {
if (!btsnd_hcic_set_conn_encrypt (p->hci_handle, FALSE)) {
return (BTM_NO_RESOURCES);
} else {
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_ENCRYPT_OFF;
}
}
p->switch_role_state = BTM_ACL_SWKEY_STATE_ENCRYPTION_OFF;
} else {
if (!btsnd_hcic_switch_role (remote_bd_addr, new_role)) {
return (BTM_NO_RESOURCES);
}
p->switch_role_state = BTM_ACL_SWKEY_STATE_IN_PROGRESS;
#if BTM_DISC_DURING_RS == TRUE
if (p_dev_rec) {
p_dev_rec->rs_disc_pending = BTM_SEC_RS_PENDING;
}
#endif
}
}
/* Initialize return structure in case request fails */
if (p_cb) {
memcpy (btm_cb.devcb.switch_role_ref_data.remote_bd_addr, remote_bd_addr,
BD_ADDR_LEN);
btm_cb.devcb.switch_role_ref_data.role = new_role;
/* initialized to an error code */
btm_cb.devcb.switch_role_ref_data.hci_status = HCI_ERR_UNSUPPORTED_VALUE;
btm_cb.devcb.p_switch_role_cb = p_cb;
}
return (BTM_CMD_STARTED);
}
/*******************************************************************************
**
** Function btm_acl_encrypt_change
**
** Description This function is when encryption of the connection is
** completed by the LM. Checks to see if a role switch or
** change of link key was active and initiates or continues
** process if needed.
**
** Returns void
**
*******************************************************************************/
void btm_acl_encrypt_change (UINT16 handle, UINT8 status, UINT8 encr_enable)
{
tACL_CONN *p;
UINT8 xx;
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_BL_ROLE_CHG_DATA evt;
BTM_TRACE_DEBUG ("btm_acl_encrypt_change handle=%d status=%d encr_enabl=%d\n",
handle, status, encr_enable);
xx = btm_handle_to_acl_index(handle);
/* don't assume that we can never get a bad hci_handle */
if (xx < MAX_L2CAP_LINKS) {
p = &btm_cb.acl_db[xx];
} else {
return;
}
/* Process Role Switch if active */
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_ENCRYPTION_OFF) {
/* if encryption turn off failed we still will try to switch role */
if (encr_enable) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
} else {
p->switch_role_state = BTM_ACL_SWKEY_STATE_SWITCHING;
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_TEMP_FUNC;
}
if (!btsnd_hcic_switch_role (p->remote_addr, (UINT8)!p->link_role)) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
btm_acl_report_role_change(btm_cb.devcb.switch_role_ref_data.hci_status, p->remote_addr);
}
#if BTM_DISC_DURING_RS == TRUE
else {
if ((p_dev_rec = btm_find_dev (p->remote_addr)) != NULL) {
p_dev_rec->rs_disc_pending = BTM_SEC_RS_PENDING;
}
}
#endif
}
/* Finished enabling Encryption after role switch */
else if (p->switch_role_state == BTM_ACL_SWKEY_STATE_ENCRYPTION_ON) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
btm_acl_report_role_change(btm_cb.devcb.switch_role_ref_data.hci_status, p->remote_addr);
/* if role change event is registered, report it now */
if (btm_cb.p_bl_changed_cb && (btm_cb.bl_evt_mask & BTM_BL_ROLE_CHG_MASK)) {
evt.event = BTM_BL_ROLE_CHG_EVT;
evt.new_role = btm_cb.devcb.switch_role_ref_data.role;
evt.p_bda = btm_cb.devcb.switch_role_ref_data.remote_bd_addr;
evt.hci_status = btm_cb.devcb.switch_role_ref_data.hci_status;
(*btm_cb.p_bl_changed_cb)((tBTM_BL_EVENT_DATA *)&evt);
BTM_TRACE_DEBUG("Role Switch Event: new_role 0x%02x, HCI Status 0x%02x, rs_st:%d\n",
evt.new_role, evt.hci_status, p->switch_role_state);
}
#if BTM_DISC_DURING_RS == TRUE
/* If a disconnect is pending, issue it now that role switch has completed */
if ((p_dev_rec = btm_find_dev (p->remote_addr)) != NULL) {
if (p_dev_rec->rs_disc_pending == BTM_SEC_DISC_PENDING) {
BTM_TRACE_WARNING("btm_acl_encrypt_change -> Issuing delayed HCI_Disconnect!!!\n");
btsnd_hcic_disconnect(p_dev_rec->hci_handle, HCI_ERR_PEER_USER);
}
BTM_TRACE_ERROR("btm_acl_encrypt_change: tBTM_SEC_DEV:0x%x rs_disc_pending=%d\n",
(UINT32)p_dev_rec, p_dev_rec->rs_disc_pending);
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
}
#endif
}
#if (CLASSIC_BT_INCLUDED == TRUE)
/* If authentication is done through legacy authentication and esp32 has
* not authenticated peer deivce yet, do not proceed for encrytion and
* first authenticate it. */
else if ((BTM_BothEndsSupportSecureConnections(p->remote_addr) == 0) &&
((p->legacy_auth_state & BTM_ACL_LEGACY_AUTH_SELF) == 0)) {
if ((p_dev_rec = btm_find_dev (p->remote_addr)) != NULL) {
if (btm_sec_legacy_authentication_mutual(p_dev_rec)) {
btm_sec_update_legacy_auth_state(btm_bda_to_acl(p_dev_rec->bd_addr, BT_TRANSPORT_BR_EDR), BTM_ACL_LEGACY_AUTH_SELF);
} else {
BTM_TRACE_ERROR("%s failed, Resources not available for Authentication procedure", __FUNCTION__);
}
}
}
#endif
}
/*******************************************************************************
**
** Function BTM_SetLinkPolicy
**
** Description Create and send HCI "Write Policy Set" command
**
** Returns status of the operation
**
*******************************************************************************/
tBTM_STATUS BTM_SetLinkPolicy (BD_ADDR remote_bda, UINT16 *settings)
{
tACL_CONN *p;
UINT8 *localFeatures = BTM_ReadLocalFeatures();
BTM_TRACE_DEBUG ("BTM_SetLinkPolicy\n");
/* BTM_TRACE_API ("BTM_SetLinkPolicy: requested settings: 0x%04x", *settings ); */
/* First, check if hold mode is supported */
if (*settings != HCI_DISABLE_ALL_LM_MODES) {
if ( (*settings & HCI_ENABLE_MASTER_SLAVE_SWITCH) && (!HCI_SWITCH_SUPPORTED(localFeatures)) ) {
*settings &= (~HCI_ENABLE_MASTER_SLAVE_SWITCH);
BTM_TRACE_API ("BTM_SetLinkPolicy switch not supported (settings: 0x%04x)\n", *settings );
}
if ( (*settings & HCI_ENABLE_HOLD_MODE) && (!HCI_HOLD_MODE_SUPPORTED(localFeatures)) ) {
*settings &= (~HCI_ENABLE_HOLD_MODE);
BTM_TRACE_API ("BTM_SetLinkPolicy hold not supported (settings: 0x%04x)\n", *settings );
}
if ( (*settings & HCI_ENABLE_SNIFF_MODE) && (!HCI_SNIFF_MODE_SUPPORTED(localFeatures)) ) {
*settings &= (~HCI_ENABLE_SNIFF_MODE);
BTM_TRACE_API ("BTM_SetLinkPolicy sniff not supported (settings: 0x%04x)\n", *settings );
}
if ( (*settings & HCI_ENABLE_PARK_MODE) && (!HCI_PARK_MODE_SUPPORTED(localFeatures)) ) {
*settings &= (~HCI_ENABLE_PARK_MODE);
BTM_TRACE_API ("BTM_SetLinkPolicy park not supported (settings: 0x%04x)\n", *settings );
}
}
if ((p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR)) != NULL) {
return (btsnd_hcic_write_policy_set (p->hci_handle, *settings) ? BTM_CMD_STARTED : BTM_NO_RESOURCES);
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** Function BTM_SetDefaultLinkPolicy
**
** Description Set the default value for HCI "Write Policy Set" command
** to use when an ACL link is created.
**
** Returns void
**
*******************************************************************************/
void BTM_SetDefaultLinkPolicy (UINT16 settings)
{
UINT8 *localFeatures = BTM_ReadLocalFeatures();
BTM_TRACE_DEBUG("BTM_SetDefaultLinkPolicy setting:0x%04x\n", settings);
if ((settings & HCI_ENABLE_MASTER_SLAVE_SWITCH) && (!HCI_SWITCH_SUPPORTED(localFeatures))) {
settings &= ~HCI_ENABLE_MASTER_SLAVE_SWITCH;
BTM_TRACE_DEBUG("BTM_SetDefaultLinkPolicy switch not supported (settings: 0x%04x)\n", settings);
}
if ((settings & HCI_ENABLE_HOLD_MODE) && (!HCI_HOLD_MODE_SUPPORTED(localFeatures))) {
settings &= ~HCI_ENABLE_HOLD_MODE;
BTM_TRACE_DEBUG("BTM_SetDefaultLinkPolicy hold not supported (settings: 0x%04x)\n", settings);
}
if ((settings & HCI_ENABLE_SNIFF_MODE) && (!HCI_SNIFF_MODE_SUPPORTED(localFeatures))) {
settings &= ~HCI_ENABLE_SNIFF_MODE;
BTM_TRACE_DEBUG("BTM_SetDefaultLinkPolicy sniff not supported (settings: 0x%04x)\n", settings);
}
if ((settings & HCI_ENABLE_PARK_MODE) && (!HCI_PARK_MODE_SUPPORTED(localFeatures))) {
settings &= ~HCI_ENABLE_PARK_MODE;
BTM_TRACE_DEBUG("BTM_SetDefaultLinkPolicy park not supported (settings: 0x%04x)\n", settings);
}
BTM_TRACE_DEBUG("Set DefaultLinkPolicy:0x%04x\n", settings);
btm_cb.btm_def_link_policy = settings;
/* Set the default Link Policy of the controller */
btsnd_hcic_write_def_policy_set(settings);
}
/*******************************************************************************
**
** Function btm_read_remote_version_complete
**
** Description This function is called when the command complete message
** is received from the HCI for the remote version info.
**
** Returns void
**
*******************************************************************************/
void btm_read_remote_version_complete (UINT8 *p)
{
tACL_CONN *p_acl_cb = &btm_cb.acl_db[0];
UINT8 status;
UINT16 handle;
int xx;
BTM_TRACE_DEBUG ("btm_read_remote_version_complete\n");
STREAM_TO_UINT8 (status, p);
STREAM_TO_UINT16 (handle, p);
/* Look up the connection by handle and copy features */
for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p_acl_cb++) {
if ((p_acl_cb->in_use) && (p_acl_cb->hci_handle == handle)) {
if (status == HCI_SUCCESS) {
STREAM_TO_UINT8 (p_acl_cb->lmp_version, p);
STREAM_TO_UINT16 (p_acl_cb->manufacturer, p);
STREAM_TO_UINT16 (p_acl_cb->lmp_subversion, p);
}
#if BLE_INCLUDED == TRUE
if (p_acl_cb->transport == BT_TRANSPORT_LE) {
if(p_acl_cb->link_role == HCI_ROLE_MASTER) {
if (HCI_LE_DATA_LEN_EXT_SUPPORTED(p_acl_cb->peer_le_features)) {
uint16_t data_length = controller_get_interface()->get_ble_default_data_packet_length();
uint16_t data_txtime = controller_get_interface()->get_ble_default_data_packet_txtime();
btsnd_hcic_ble_set_data_length(p_acl_cb->hci_handle, data_length, data_txtime);
}
l2cble_notify_le_connection (p_acl_cb->remote_addr);
} else {
//slave role, read remote feature
btsnd_hcic_ble_read_remote_feat(p_acl_cb->hci_handle);
}
}
#endif
break;
}
}
}
/*******************************************************************************
**
** Function btm_process_remote_ext_features
**
** Description Local function called to process all extended features pages
** read from a remote device.
**
** Returns void
**
*******************************************************************************/
void btm_process_remote_ext_features (tACL_CONN *p_acl_cb, UINT8 num_read_pages)
{
UINT16 handle = p_acl_cb->hci_handle;
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev_by_handle (handle);
UINT8 page_idx;
BTM_TRACE_DEBUG ("btm_process_remote_ext_features\n");
/* Make sure we have the record to save remote features information */
if (p_dev_rec == NULL) {
/* Get a new device; might be doing dedicated bonding */
p_dev_rec = btm_find_or_alloc_dev (p_acl_cb->remote_addr);
}
p_acl_cb->num_read_pages = num_read_pages;
p_dev_rec->num_read_pages = num_read_pages;
/* Move the pages to placeholder */
for (page_idx = 0; page_idx < num_read_pages; page_idx++) {
if (page_idx > HCI_EXT_FEATURES_PAGE_MAX) {
BTM_TRACE_ERROR("%s: page=%d unexpected\n", __FUNCTION__, page_idx);
break;
}
memcpy (p_dev_rec->features[page_idx], p_acl_cb->peer_lmp_features[page_idx],
HCI_FEATURE_BYTES_PER_PAGE);
}
const UINT8 req_pend = (p_dev_rec->sm4 & BTM_SM4_REQ_PEND);
#if (SMP_INCLUDED == TRUE)
/* Store the Peer Security Capabilites (in SM4 and rmt_sec_caps) */
btm_sec_set_peer_sec_caps(p_acl_cb, p_dev_rec);
#endif ///SMP_INCLUDED == TRUE
BTM_TRACE_API("%s: pend:%d\n", __FUNCTION__, req_pend);
if (req_pend) {
#if (CLASSIC_BT_INCLUDED == TRUE)
/* Request for remaining Security Features (if any) */
l2cu_resubmit_pending_sec_req (p_dev_rec->bd_addr);
#endif ///CLASSIC_BT_INCLUDED == TRUE
}
}
/*******************************************************************************
**
** Function btm_read_remote_features
**
** Description Local function called to send a read remote supported features/
** remote extended features page[0].
**
** Returns void
**
*******************************************************************************/
void btm_read_remote_features (UINT16 handle)
{
UINT8 acl_idx;
tACL_CONN *p_acl_cb;
BTM_TRACE_DEBUG("btm_read_remote_features() handle: %d\n", handle);
if ((acl_idx = btm_handle_to_acl_index(handle)) >= MAX_L2CAP_LINKS) {
BTM_TRACE_ERROR("btm_read_remote_features handle=%d invalid\n", handle);
return;
}
p_acl_cb = &btm_cb.acl_db[acl_idx];
p_acl_cb->num_read_pages = 0;
memset (p_acl_cb->peer_lmp_features, 0, sizeof(p_acl_cb->peer_lmp_features));
/* first send read remote supported features HCI command */
/* because we don't know whether the remote support extended feature command */
btsnd_hcic_rmt_features_req (handle);
}
/*******************************************************************************
**
** Function btm_read_remote_ext_features
**
** Description Local function called to send a read remote extended features
**
** Returns void
**
*******************************************************************************/
void btm_read_remote_ext_features (UINT16 handle, UINT8 page_number)
{
BTM_TRACE_DEBUG("btm_read_remote_ext_features() handle: %d page: %d\n", handle, page_number);
btsnd_hcic_rmt_ext_features(handle, page_number);
}
/*******************************************************************************
**
** Function btm_read_remote_features_complete
**
** Description This function is called when the remote supported features
** complete event is received from the HCI.
**
** Returns void
**
*******************************************************************************/
void btm_read_remote_features_complete (UINT8 *p)
{
tACL_CONN *p_acl_cb;
UINT8 status;
UINT16 handle;
UINT8 acl_idx;
BTM_TRACE_DEBUG ("btm_read_remote_features_complete\n");
STREAM_TO_UINT8 (status, p);
if (status != HCI_SUCCESS) {
BTM_TRACE_ERROR ("btm_read_remote_features_complete failed (status 0x%02x)\n", status);
return;
}
STREAM_TO_UINT16 (handle, p);
if ((acl_idx = btm_handle_to_acl_index(handle)) >= MAX_L2CAP_LINKS) {
BTM_TRACE_ERROR("btm_read_remote_features_complete handle=%d invalid\n", handle);
return;
}
p_acl_cb = &btm_cb.acl_db[acl_idx];
/* Copy the received features page */
STREAM_TO_ARRAY(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0], p,
HCI_FEATURE_BYTES_PER_PAGE);
if ((HCI_LMP_EXTENDED_SUPPORTED(p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])) &&
(controller_get_interface()->supports_reading_remote_extended_features())) {
/* if the remote controller has extended features and local controller supports
** HCI_Read_Remote_Extended_Features command then start reading these feature starting
** with extended features page 1 */
BTM_TRACE_DEBUG ("Start reading remote extended features\n");
btm_read_remote_ext_features(handle, HCI_EXT_FEATURES_PAGE_1);
return;
}
/* Remote controller has no extended features. Process remote controller supported features
(features page HCI_EXT_FEATURES_PAGE_0). */
btm_process_remote_ext_features (p_acl_cb, 1);
/* Continue with HCI connection establishment */
btm_establish_continue (p_acl_cb);
}
/*******************************************************************************
**
** Function btm_read_remote_ext_features_complete
**
** Description This function is called when the remote extended features
** complete event is received from the HCI.
**
** Returns void
**
*******************************************************************************/
void btm_read_remote_ext_features_complete (UINT8 *p)
{
tACL_CONN *p_acl_cb;
UINT8 page_num, max_page;
UINT16 handle;
UINT8 acl_idx;
BTM_TRACE_DEBUG ("btm_read_remote_ext_features_complete\n");
++p;
STREAM_TO_UINT16 (handle, p);
STREAM_TO_UINT8 (page_num, p);
STREAM_TO_UINT8 (max_page, p);
/* Validate parameters */
if ((acl_idx = btm_handle_to_acl_index(handle)) >= MAX_L2CAP_LINKS) {
BTM_TRACE_ERROR("btm_read_remote_ext_features_complete handle=%d invalid\n", handle);
return;
}
if (max_page > HCI_EXT_FEATURES_PAGE_MAX) {
BTM_TRACE_ERROR("btm_read_remote_ext_features_complete page=%d unknown", max_page);
return;
}
p_acl_cb = &btm_cb.acl_db[acl_idx];
/* Copy the received features page */
STREAM_TO_ARRAY(p_acl_cb->peer_lmp_features[page_num], p, HCI_FEATURE_BYTES_PER_PAGE);
/* If there is the next remote features page and
* we have space to keep this page data - read this page */
if ((page_num < max_page) && (page_num < HCI_EXT_FEATURES_PAGE_MAX)) {
page_num++;
BTM_TRACE_DEBUG("BTM reads next remote extended features page (%d)\n", page_num);
btm_read_remote_ext_features (handle, page_num);
return;
}
/* Reading of remote feature pages is complete */
BTM_TRACE_DEBUG("BTM reached last remote extended features page (%d)\n", page_num);
/* Process the pages */
btm_process_remote_ext_features (p_acl_cb, (UINT8) (page_num + 1));
/* Continue with HCI connection establishment */
btm_establish_continue (p_acl_cb);
}
/*******************************************************************************
**
** Function btm_read_remote_ext_features_failed
**
** Description This function is called when the remote extended features
** complete event returns a failed status.
**
** Returns void
**
*******************************************************************************/
void btm_read_remote_ext_features_failed (UINT8 status, UINT16 handle)
{
tACL_CONN *p_acl_cb;
UINT8 acl_idx;
BTM_TRACE_WARNING ("btm_read_remote_ext_features_failed (status 0x%02x) for handle %d\n",
status, handle);
if ((acl_idx = btm_handle_to_acl_index(handle)) >= MAX_L2CAP_LINKS) {
BTM_TRACE_ERROR("btm_read_remote_ext_features_failed handle=%d invalid\n", handle);
return;
}
p_acl_cb = &btm_cb.acl_db[acl_idx];
/* Process supported features only */
btm_process_remote_ext_features (p_acl_cb, 1);
/* Continue HCI connection establishment */
btm_establish_continue (p_acl_cb);
}
/*******************************************************************************
**
** Function btm_establish_continue
**
** Description This function is called when the command complete message
** is received from the HCI for the read local link policy request.
**
** Returns void
**
*******************************************************************************/
void btm_establish_continue (tACL_CONN *p_acl_cb)
{
tBTM_BL_EVENT_DATA evt_data;
BTM_TRACE_DEBUG ("btm_establish_continue\n");
#if (!defined(BTM_BYPASS_EXTRA_ACL_SETUP) || BTM_BYPASS_EXTRA_ACL_SETUP == FALSE)
#if (defined BLE_INCLUDED && BLE_INCLUDED == TRUE)
if (p_acl_cb->transport == BT_TRANSPORT_BR_EDR)
#endif
{
/* For now there are a some devices that do not like sending */
/* commands events and data at the same time. */
/* Set the packet types to the default allowed by the device */
btm_set_packet_types (p_acl_cb, btm_cb.btm_acl_pkt_types_supported);
if (btm_cb.btm_def_link_policy) {
BTM_SetLinkPolicy (p_acl_cb->remote_addr, &btm_cb.btm_def_link_policy);
}
}
#endif
p_acl_cb->link_up_issued = TRUE;
/* If anyone cares, tell him database changed */
if (btm_cb.p_bl_changed_cb) {
evt_data.event = BTM_BL_CONN_EVT;
evt_data.conn.p_bda = p_acl_cb->remote_addr;
evt_data.conn.p_bdn = p_acl_cb->remote_name;
evt_data.conn.p_dc = p_acl_cb->remote_dc;
evt_data.conn.p_features = p_acl_cb->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0];
evt_data.conn.sc_downgrade = p_acl_cb->sc_downgrade;
#if BLE_INCLUDED == TRUE
evt_data.conn.handle = p_acl_cb->hci_handle;
evt_data.conn.transport = p_acl_cb->transport;
#endif
(*btm_cb.p_bl_changed_cb)(&evt_data);
}
btm_acl_update_busy_level (BTM_BLI_ACL_UP_EVT);
}
/*******************************************************************************
**
** Function BTM_SetDefaultLinkSuperTout
**
** Description Set the default value for HCI "Write Link Supervision Timeout"
** command to use when an ACL link is created.
**
** Returns void
**
*******************************************************************************/
void BTM_SetDefaultLinkSuperTout (UINT16 timeout)
{
BTM_TRACE_DEBUG ("BTM_SetDefaultLinkSuperTout\n");
btm_cb.btm_def_link_super_tout = timeout;
}
/*******************************************************************************
**
** Function BTM_GetLinkSuperTout
**
** Description Read the link supervision timeout value of the connection
**
** Returns status of the operation
**
*******************************************************************************/
tBTM_STATUS BTM_GetLinkSuperTout (BD_ADDR remote_bda, UINT16 *p_timeout)
{
tACL_CONN *p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_GetLinkSuperTout\n");
if (p != (tACL_CONN *)NULL) {
*p_timeout = p->link_super_tout;
return (BTM_SUCCESS);
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** Function BTM_SetLinkSuperTout
**
** Description Create and send HCI "Write Link Supervision Timeout" command
**
** Returns status of the operation
**
*******************************************************************************/
tBTM_STATUS BTM_SetLinkSuperTout (BD_ADDR remote_bda, UINT16 timeout)
{
tACL_CONN *p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_SetLinkSuperTout\n");
if (p != (tACL_CONN *)NULL) {
p->link_super_tout = timeout;
/* Only send if current role is Master; 2.0 spec requires this */
if (p->link_role == BTM_ROLE_MASTER) {
if (!btsnd_hcic_write_link_super_tout (LOCAL_BR_EDR_CONTROLLER_ID,
p->hci_handle, timeout)) {
return (BTM_NO_RESOURCES);
}
return (BTM_CMD_STARTED);
} else {
return (BTM_SUCCESS);
}
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** Function BTM_IsAclConnectionUp
**
** Description This function is called to check if an ACL connection exists
** to a specific remote BD Address.
**
** Returns TRUE if connection is up, else FALSE.
**
*******************************************************************************/
BOOLEAN BTM_IsAclConnectionUp (BD_ADDR remote_bda, tBT_TRANSPORT transport)
{
tACL_CONN *p;
BTM_TRACE_API ("BTM_IsAclConnectionUp: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
remote_bda[0], remote_bda[1], remote_bda[2],
remote_bda[3], remote_bda[4], remote_bda[5]);
p = btm_bda_to_acl(remote_bda, transport);
if (p != (tACL_CONN *)NULL) {
return (TRUE);
}
/* If here, no BD Addr found */
return (FALSE);
}
/*******************************************************************************
**
** Function BTM_GetNumAclLinks
**
** Description This function is called to count the number of
** ACL links that are active.
**
** Returns UINT16 Number of active ACL links
**
*******************************************************************************/
UINT16 BTM_GetNumAclLinks (void)
{
uint16_t num_acl = 0;
for (uint16_t i = 0; i < MAX_L2CAP_LINKS; ++i) {
if (btm_cb.acl_db[i].in_use) {
++num_acl;
}
}
return num_acl;
}
/*******************************************************************************
**
** Function btm_get_acl_disc_reason_code
**
** Description This function is called to get the disconnection reason code
** returned by the HCI at disconnection complete event.
**
** Returns TRUE if connection is up, else FALSE.
**
*******************************************************************************/
UINT16 btm_get_acl_disc_reason_code (void)
{
UINT8 res = btm_cb.acl_disc_reason;
BTM_TRACE_DEBUG ("btm_get_acl_disc_reason_code\n");
return (res);
}
/*******************************************************************************
**
** Function BTM_GetHCIConnHandle
**
** Description This function is called to get the handle for an ACL connection
** to a specific remote BD Address.
**
** Returns the handle of the connection, or 0xFFFF if none.
**
*******************************************************************************/
UINT16 BTM_GetHCIConnHandle (BD_ADDR remote_bda, tBT_TRANSPORT transport)
{
tACL_CONN *p;
BTM_TRACE_DEBUG ("BTM_GetHCIConnHandle\n");
p = btm_bda_to_acl(remote_bda, transport);
if (p != (tACL_CONN *)NULL) {
return (p->hci_handle);
}
/* If here, no BD Addr found */
return (0xFFFF);
}
/*******************************************************************************
**
** Function btm_process_clk_off_comp_evt
**
** Description This function is called when clock offset command completes.
**
** Input Parms hci_handle - connection handle associated with the change
** clock offset
**
** Returns void
**
*******************************************************************************/
void btm_process_clk_off_comp_evt (UINT16 hci_handle, UINT16 clock_offset)
{
UINT8 xx;
BTM_TRACE_DEBUG ("btm_process_clk_off_comp_evt\n");
/* Look up the connection by handle and set the current mode */
if ((xx = btm_handle_to_acl_index(hci_handle)) < MAX_L2CAP_LINKS) {
btm_cb.acl_db[xx].clock_offset = clock_offset;
}
}
/*******************************************************************************
**
** Function btm_acl_role_changed
**
** Description This function is called whan a link's master/slave role change
** event or command status event (with error) is received.
** It updates the link control block, and calls
** the registered callback with status and role (if registered).
**
** Returns void
**
*******************************************************************************/
void btm_acl_role_changed (UINT8 hci_status, BD_ADDR bd_addr, UINT8 new_role)
{
UINT8 *p_bda = (bd_addr) ? bd_addr :
btm_cb.devcb.switch_role_ref_data.remote_bd_addr;
tACL_CONN *p = btm_bda_to_acl(p_bda, BT_TRANSPORT_BR_EDR);
tBTM_ROLE_SWITCH_CMPL *p_data = &btm_cb.devcb.switch_role_ref_data;
tBTM_SEC_DEV_REC *p_dev_rec;
tBTM_BL_ROLE_CHG_DATA evt;
BTM_TRACE_DEBUG ("btm_acl_role_changed\n");
/* Ignore any stray events */
if (p == NULL) {
/* it could be a failure */
if (hci_status != HCI_SUCCESS) {
btm_acl_report_role_change(hci_status, bd_addr);
}
return;
}
p_data->hci_status = hci_status;
if (hci_status == HCI_SUCCESS) {
p_data->role = new_role;
memcpy(p_data->remote_bd_addr, p_bda, BD_ADDR_LEN);
/* Update cached value */
p->link_role = new_role;
/* Reload LSTO: link supervision timeout is reset in the LM after a role switch */
if (new_role == BTM_ROLE_MASTER) {
BTM_SetLinkSuperTout (p->remote_addr, p->link_super_tout);
}
} else {
/* so the BTM_BL_ROLE_CHG_EVT uses the old role */
new_role = p->link_role;
}
/* Check if any SCO req is pending for role change */
btm_sco_chk_pend_rolechange (p->hci_handle);
/* if switching state is switching we need to turn encryption on */
/* if idle, we did not change encryption */
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_SWITCHING) {
if (btsnd_hcic_set_conn_encrypt (p->hci_handle, TRUE)) {
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_ENCRYPT_ON;
p->switch_role_state = BTM_ACL_SWKEY_STATE_ENCRYPTION_ON;
return;
}
}
/* Set the switch_role_state to IDLE since the reply received from HCI */
/* regardless of its result either success or failed. */
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_IN_PROGRESS) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
}
/* if role switch complete is needed, report it now */
btm_acl_report_role_change(hci_status, bd_addr);
/* if role change event is registered, report it now */
if (btm_cb.p_bl_changed_cb && (btm_cb.bl_evt_mask & BTM_BL_ROLE_CHG_MASK)) {
evt.event = BTM_BL_ROLE_CHG_EVT;
evt.new_role = new_role;
evt.p_bda = p_bda;
evt.hci_status = hci_status;
(*btm_cb.p_bl_changed_cb)((tBTM_BL_EVENT_DATA *)&evt);
}
BTM_TRACE_DEBUG("Role Switch Event: new_role 0x%02x, HCI Status 0x%02x, rs_st:%d\n",
p_data->role, p_data->hci_status, p->switch_role_state);
#if BTM_DISC_DURING_RS == TRUE
/* If a disconnect is pending, issue it now that role switch has completed */
if ((p_dev_rec = btm_find_dev (p_bda)) != NULL) {
if (p_dev_rec->rs_disc_pending == BTM_SEC_DISC_PENDING) {
BTM_TRACE_WARNING("btm_acl_role_changed -> Issuing delayed HCI_Disconnect!!!\n");
btsnd_hcic_disconnect(p_dev_rec->hci_handle, HCI_ERR_PEER_USER);
}
BTM_TRACE_ERROR("tBTM_SEC_DEV:0x%x rs_disc_pending=%d\n",
(UINT32)p_dev_rec, p_dev_rec->rs_disc_pending);
p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
}
#endif
}
/*******************************************************************************
**
** Function BTM_AllocateSCN
**
** Description Look through the Server Channel Numbers for a free one.
**
** Returns Allocated SCN number or 0 if none.
**
*******************************************************************************/
#if (CLASSIC_BT_INCLUDED == TRUE)
UINT8 BTM_AllocateSCN(void)
{
UINT8 x;
BTM_TRACE_DEBUG ("BTM_AllocateSCN\n");
for (x = 1; x < BTM_MAX_SCN; x++) {
if (!btm_cb.btm_scn[x - 1]) {
btm_cb.btm_scn[x - 1] = TRUE;
return x;
}
}
return (0); /* No free ports */
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
/*******************************************************************************
**
** Function BTM_TryAllocateSCN
**
** Description Try to allocate a fixed server channel
**
** Returns Returns TRUE if server channel was available
**
*******************************************************************************/
#if (CLASSIC_BT_INCLUDED == TRUE)
BOOLEAN BTM_TryAllocateSCN(UINT8 scn)
{
if (scn >= BTM_MAX_SCN) {
return FALSE;
}
/* check if this port is available */
if (!btm_cb.btm_scn[scn - 1]) {
btm_cb.btm_scn[scn - 1] = TRUE;
return TRUE;
}
return (FALSE); /* Port was busy */
}
/*******************************************************************************
**
** Function BTM_FreeSCN
**
** Description Free the specified SCN.
**
** Returns TRUE or FALSE
**
*******************************************************************************/
BOOLEAN BTM_FreeSCN(UINT8 scn)
{
BTM_TRACE_DEBUG ("BTM_FreeSCN \n");
if (scn <= BTM_MAX_SCN) {
btm_cb.btm_scn[scn - 1] = FALSE;
return (TRUE);
} else {
return (FALSE); /* Illegal SCN passed in */
}
return (FALSE);
}
#endif ///CLASSIC_BT_INCLUDED == TRUE
/*******************************************************************************
**
** Function btm_set_packet_types
**
** Description This function sets the packet types used for a specific
** ACL connection. It is called internally by btm_acl_created
** or by an application/profile by BTM_SetPacketTypes.
**
** Returns status of the operation
**
*******************************************************************************/
tBTM_STATUS btm_set_packet_types (tACL_CONN *p, UINT16 pkt_types)
{
UINT16 temp_pkt_types;
BTM_TRACE_DEBUG ("btm_set_packet_types\n");
/* Save in the ACL control blocks, types that we support */
temp_pkt_types = (pkt_types & BTM_ACL_SUPPORTED_PKTS_MASK &
btm_cb.btm_acl_pkt_types_supported);
/* OR in any exception packet types if at least 2.0 version of spec */
temp_pkt_types |= ((pkt_types & BTM_ACL_EXCEPTION_PKTS_MASK) |
(btm_cb.btm_acl_pkt_types_supported & BTM_ACL_EXCEPTION_PKTS_MASK));
/* Exclude packet types not supported by the peer */
btm_acl_chk_peer_pkt_type_support (p, &temp_pkt_types);
BTM_TRACE_DEBUG ("SetPacketType Mask -> 0x%04x\n", temp_pkt_types);
if (!btsnd_hcic_change_conn_type (p->hci_handle, temp_pkt_types)) {
return (BTM_NO_RESOURCES);
}
p->pkt_types_mask = temp_pkt_types;
return (BTM_CMD_STARTED);
}
/*******************************************************************************
**
** Function btm_get_max_packet_size
**
** Returns Returns maximum packet size that can be used for current
** connection, 0 if connection is not established
**
*******************************************************************************/
UINT16 btm_get_max_packet_size (BD_ADDR addr)
{
tACL_CONN *p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
UINT16 pkt_types = 0;
UINT16 pkt_size = 0;
BTM_TRACE_DEBUG ("btm_get_max_packet_size\n");
if (p != NULL) {
pkt_types = p->pkt_types_mask;
} else {
/* Special case for when info for the local device is requested */
if (memcmp (controller_get_interface()->get_address(), addr, BD_ADDR_LEN) == 0) {
pkt_types = btm_cb.btm_acl_pkt_types_supported;
}
}
if (pkt_types) {
if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_3_DH5)) {
pkt_size = HCI_EDR3_DH5_PACKET_SIZE;
} else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_2_DH5)) {
pkt_size = HCI_EDR2_DH5_PACKET_SIZE;
} else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_3_DH3)) {
pkt_size = HCI_EDR3_DH3_PACKET_SIZE;
} else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DH5) {
pkt_size = HCI_DH5_PACKET_SIZE;
} else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_2_DH3)) {
pkt_size = HCI_EDR2_DH3_PACKET_SIZE;
} else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DM5) {
pkt_size = HCI_DM5_PACKET_SIZE;
} else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DH3) {
pkt_size = HCI_DH3_PACKET_SIZE;
} else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DM3) {
pkt_size = HCI_DM3_PACKET_SIZE;
} else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_3_DH1)) {
pkt_size = HCI_EDR3_DH1_PACKET_SIZE;
} else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_2_DH1)) {
pkt_size = HCI_EDR2_DH1_PACKET_SIZE;
} else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DH1) {
pkt_size = HCI_DH1_PACKET_SIZE;
} else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DM1) {
pkt_size = HCI_DM1_PACKET_SIZE;
}
}
return (pkt_size);
}
/*******************************************************************************
**
** Function BTM_ReadRemoteVersion
**
** Returns If connected report peer device info
**
*******************************************************************************/
tBTM_STATUS BTM_ReadRemoteVersion (BD_ADDR addr, UINT8 *lmp_version,
UINT16 *manufacturer, UINT16 *lmp_sub_version)
{
tACL_CONN *p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_ReadRemoteVersion\n");
if (p == NULL) {
return (BTM_UNKNOWN_ADDR);
}
if (lmp_version) {
*lmp_version = p->lmp_version;
}
if (manufacturer) {
*manufacturer = p->manufacturer;
}
if (lmp_sub_version) {
*lmp_sub_version = p->lmp_subversion;
}
return (BTM_SUCCESS);
}
/*******************************************************************************
**
** Function BTM_ReadRemoteFeatures
**
** Returns pointer to the remote supported features mask (8 bytes)
**
*******************************************************************************/
UINT8 *BTM_ReadRemoteFeatures (BD_ADDR addr)
{
tACL_CONN *p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_ReadRemoteFeatures\n");
if (p == NULL) {
return (NULL);
}
return (p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0]);
}
/*******************************************************************************
**
** Function BTM_ReadRemoteExtendedFeatures
**
** Returns pointer to the remote extended features mask (8 bytes)
** or NULL if bad page
**
*******************************************************************************/
UINT8 *BTM_ReadRemoteExtendedFeatures (BD_ADDR addr, UINT8 page_number)
{
tACL_CONN *p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_ReadRemoteExtendedFeatures\n");
if (p == NULL) {
return (NULL);
}
if (page_number > HCI_EXT_FEATURES_PAGE_MAX) {
BTM_TRACE_ERROR("Warning: BTM_ReadRemoteExtendedFeatures page %d unknown\n", page_number);
return NULL;
}
return (p->peer_lmp_features[page_number]);
}
/*******************************************************************************
**
** Function BTM_ReadNumberRemoteFeaturesPages
**
** Returns number of features pages read from the remote device.
**
*******************************************************************************/
UINT8 BTM_ReadNumberRemoteFeaturesPages (BD_ADDR addr)
{
tACL_CONN *p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_ReadNumberRemoteFeaturesPages\n");
if (p == NULL) {
return (0);
}
return (p->num_read_pages);
}
/*******************************************************************************
**
** Function BTM_ReadAllRemoteFeatures
**
** Returns pointer to all features of the remote (24 bytes).
**
*******************************************************************************/
UINT8 *BTM_ReadAllRemoteFeatures (BD_ADDR addr)
{
tACL_CONN *p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
BTM_TRACE_DEBUG ("BTM_ReadAllRemoteFeatures\n");
if (p == NULL) {
return (NULL);
}
return (p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0]);
}
/*******************************************************************************
**
** Function BTM_RegBusyLevelNotif
**
** Description This function is called to register a callback to receive
** busy level change events.
**
** Returns BTM_SUCCESS if successfully registered, otherwise error
**
*******************************************************************************/
tBTM_STATUS BTM_RegBusyLevelNotif (tBTM_BL_CHANGE_CB *p_cb, UINT8 *p_level,
tBTM_BL_EVENT_MASK evt_mask)
{
BTM_TRACE_DEBUG ("BTM_RegBusyLevelNotif\n");
if (p_level) {
*p_level = btm_cb.busy_level;
}
btm_cb.bl_evt_mask = evt_mask;
if (!p_cb) {
btm_cb.p_bl_changed_cb = NULL;
} else if (btm_cb.p_bl_changed_cb) {
return (BTM_BUSY);
} else {
btm_cb.p_bl_changed_cb = p_cb;
}
return (BTM_SUCCESS);
}
/*******************************************************************************
**
** Function BTM_SetQoS
**
** Description This function is called to setup QoS
**
** Returns status of the operation
**
*******************************************************************************/
tBTM_STATUS BTM_SetQoS (BD_ADDR bd, FLOW_SPEC *p_flow, tBTM_CMPL_CB *p_cb)
{
tACL_CONN *p = &btm_cb.acl_db[0];
BTM_TRACE_API ("BTM_SetQoS: BdAddr: %02x%02x%02x%02x%02x%02x\n",
bd[0], bd[1], bd[2],
bd[3], bd[4], bd[5]);
/* If someone already waiting on the version, do not allow another */
if (btm_cb.devcb.p_qossu_cmpl_cb) {
return (BTM_BUSY);
}
if ( (p = btm_bda_to_acl(bd, BT_TRANSPORT_BR_EDR)) != NULL) {
btu_start_timer (&btm_cb.devcb.qossu_timer, BTU_TTYPE_BTM_ACL, BTM_DEV_REPLY_TIMEOUT);
btm_cb.devcb.p_qossu_cmpl_cb = p_cb;
if (!btsnd_hcic_qos_setup (p->hci_handle, p_flow->qos_flags, p_flow->service_type,
p_flow->token_rate, p_flow->peak_bandwidth,
p_flow->latency, p_flow->delay_variation)) {
btm_cb.devcb.p_qossu_cmpl_cb = NULL;
btu_stop_timer(&btm_cb.devcb.qossu_timer);
return (BTM_NO_RESOURCES);
} else {
return (BTM_CMD_STARTED);
}
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** Function btm_qos_setup_complete
**
** Description This function is called when the command complete message
** is received from the HCI for the qos setup request.
**
** Returns void
**
*******************************************************************************/
void btm_qos_setup_complete (UINT8 status, UINT16 handle, FLOW_SPEC *p_flow)
{
tBTM_CMPL_CB *p_cb = btm_cb.devcb.p_qossu_cmpl_cb;
tBTM_QOS_SETUP_CMPL qossu;
BTM_TRACE_DEBUG ("btm_qos_setup_complete\n");
btu_stop_timer (&btm_cb.devcb.qossu_timer);
btm_cb.devcb.p_qossu_cmpl_cb = NULL;
if (p_cb) {
memset(&qossu, 0, sizeof(tBTM_QOS_SETUP_CMPL));
qossu.status = status;
qossu.handle = handle;
if (p_flow != NULL) {
qossu.flow.qos_flags = p_flow->qos_flags;
qossu.flow.service_type = p_flow->service_type;
qossu.flow.token_rate = p_flow->token_rate;
qossu.flow.peak_bandwidth = p_flow->peak_bandwidth;
qossu.flow.latency = p_flow->latency;
qossu.flow.delay_variation = p_flow->delay_variation;
}
BTM_TRACE_DEBUG ("BTM: p_flow->delay_variation: 0x%02x\n",
qossu.flow.delay_variation);
(*p_cb)(&qossu);
}
}
/*******************************************************************************
**
** Function BTM_ReadRSSI
**
** Description This function is called to read the link policy settings.
** The address of link policy results are returned in the callback.
** (tBTM_RSSI_RESULTS)
**
** Returns BTM_CMD_STARTED if successfully initiated or error code
**
*******************************************************************************/
tBTM_STATUS BTM_ReadRSSI (BD_ADDR remote_bda, tBT_TRANSPORT transport, tBTM_CMPL_CB *p_cb)
{
tACL_CONN *p;
BTM_TRACE_API ("BTM_ReadRSSI: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
remote_bda[0], remote_bda[1], remote_bda[2],
remote_bda[3], remote_bda[4], remote_bda[5]);
tBTM_RSSI_RESULTS result;
/* If someone already waiting on the version, do not allow another */
if (btm_cb.devcb.p_rssi_cmpl_cb) {
result.status = BTM_BUSY;
(*p_cb)(&result);
return (BTM_BUSY);
}
p = btm_bda_to_acl(remote_bda, transport);
if (p != (tACL_CONN *)NULL) {
btu_start_timer (&btm_cb.devcb.rssi_timer, BTU_TTYPE_BTM_ACL,
BTM_DEV_REPLY_TIMEOUT);
btm_cb.devcb.p_rssi_cmpl_cb = p_cb;
if (!btsnd_hcic_read_rssi (p->hci_handle)) {
btm_cb.devcb.p_rssi_cmpl_cb = NULL;
btu_stop_timer (&btm_cb.devcb.rssi_timer);
result.status = BTM_NO_RESOURCES;
(*p_cb)(&result);
return (BTM_NO_RESOURCES);
} else {
return (BTM_CMD_STARTED);
}
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** Function BTM_ReadLinkQuality
**
** Description This function is called to read the link qulaity.
** The value of the link quality is returned in the callback.
** (tBTM_LINK_QUALITY_RESULTS)
**
** Returns BTM_CMD_STARTED if successfully initiated or error code
**
*******************************************************************************/
tBTM_STATUS BTM_ReadLinkQuality (BD_ADDR remote_bda, tBTM_CMPL_CB *p_cb)
{
tACL_CONN *p;
BTM_TRACE_API ("BTM_ReadLinkQuality: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
remote_bda[0], remote_bda[1], remote_bda[2],
remote_bda[3], remote_bda[4], remote_bda[5]);
/* If someone already waiting on the version, do not allow another */
if (btm_cb.devcb.p_lnk_qual_cmpl_cb) {
return (BTM_BUSY);
}
p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
if (p != (tACL_CONN *)NULL) {
btu_start_timer (&btm_cb.devcb.lnk_quality_timer, BTU_TTYPE_BTM_ACL,
BTM_DEV_REPLY_TIMEOUT);
btm_cb.devcb.p_lnk_qual_cmpl_cb = p_cb;
if (!btsnd_hcic_get_link_quality (p->hci_handle)) {
btu_stop_timer (&btm_cb.devcb.lnk_quality_timer);
btm_cb.devcb.p_lnk_qual_cmpl_cb = NULL;
return (BTM_NO_RESOURCES);
} else {
return (BTM_CMD_STARTED);
}
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
/*******************************************************************************
**
** Function BTM_ReadTxPower
**
** Description This function is called to read the current
** TX power of the connection. The tx power level results
** are returned in the callback.
** (tBTM_RSSI_RESULTS)
**
** Returns BTM_CMD_STARTED if successfully initiated or error code
**
*******************************************************************************/
tBTM_STATUS BTM_ReadTxPower (BD_ADDR remote_bda, tBT_TRANSPORT transport, tBTM_CMPL_CB *p_cb)
{
tACL_CONN *p;
BOOLEAN ret;
#define BTM_READ_RSSI_TYPE_CUR 0x00
#define BTM_READ_RSSI_TYPE_MAX 0X01
BTM_TRACE_API ("BTM_ReadTxPower: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
remote_bda[0], remote_bda[1], remote_bda[2],
remote_bda[3], remote_bda[4], remote_bda[5]);
/* If someone already waiting on the version, do not allow another */
if (btm_cb.devcb.p_tx_power_cmpl_cb) {
return (BTM_BUSY);
}
p = btm_bda_to_acl(remote_bda, transport);
if (p != (tACL_CONN *)NULL) {
btu_start_timer (&btm_cb.devcb.tx_power_timer, BTU_TTYPE_BTM_ACL,
BTM_DEV_REPLY_TIMEOUT);
btm_cb.devcb.p_tx_power_cmpl_cb = p_cb;
#if BLE_INCLUDED == TRUE
if (p->transport == BT_TRANSPORT_LE) {
memcpy(btm_cb.devcb.read_tx_pwr_addr, remote_bda, BD_ADDR_LEN);
ret = btsnd_hcic_ble_read_adv_chnl_tx_power();
} else
#endif
{
ret = btsnd_hcic_read_tx_power (p->hci_handle, BTM_READ_RSSI_TYPE_CUR);
}
if (!ret) {
btm_cb.devcb.p_tx_power_cmpl_cb = NULL;
btu_stop_timer (&btm_cb.devcb.tx_power_timer);
return (BTM_NO_RESOURCES);
} else {
return (BTM_CMD_STARTED);
}
}
/* If here, no BD Addr found */
return (BTM_UNKNOWN_ADDR);
}
tBTM_STATUS BTM_BleReadAdvTxPower(tBTM_CMPL_CB *p_cb)
{
BOOLEAN ret;
tBTM_TX_POWER_RESULTS result;
/* If someone already waiting on the version, do not allow another */
if (btm_cb.devcb.p_tx_power_cmpl_cb) {
result.status = BTM_BUSY;
(*p_cb)(&result);
return (BTM_BUSY);
}
btm_cb.devcb.p_tx_power_cmpl_cb = p_cb;
btu_start_timer (&btm_cb.devcb.tx_power_timer, BTU_TTYPE_BTM_ACL,
BTM_DEV_REPLY_TIMEOUT);
ret = btsnd_hcic_ble_read_adv_chnl_tx_power();
if(!ret) {
btm_cb.devcb.p_tx_power_cmpl_cb = NULL;
btu_stop_timer (&btm_cb.devcb.tx_power_timer);
result.status = BTM_NO_RESOURCES;
(*p_cb)(&result);
return (BTM_NO_RESOURCES);
} else {
return BTM_CMD_STARTED;
}
}
void BTM_BleGetWhiteListSize(uint16_t *length)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
if (p_cb->white_list_avail_size == 0) {
BTM_TRACE_WARNING("%s Whitelist full.", __func__);
}
*length = p_cb->white_list_avail_size;
return;
}
/*******************************************************************************
**
** Function btm_read_tx_power_complete
**
** Description This function is called when the command complete message
** is received from the HCI for the read tx power request.
**
** Returns void
**
*******************************************************************************/
void btm_read_tx_power_complete (UINT8 *p, BOOLEAN is_ble)
{
tBTM_CMPL_CB *p_cb = btm_cb.devcb.p_tx_power_cmpl_cb;
tBTM_TX_POWER_RESULTS results;
UINT16 handle;
tACL_CONN *p_acl_cb = &btm_cb.acl_db[0];
UINT16 index;
BTM_TRACE_DEBUG ("btm_read_tx_power_complete\n");
btu_stop_timer (&btm_cb.devcb.tx_power_timer);
/* If there was a callback registered for read rssi, call it */
btm_cb.devcb.p_tx_power_cmpl_cb = NULL;
if (p_cb) {
STREAM_TO_UINT8 (results.hci_status, p);
if (results.hci_status == HCI_SUCCESS) {
results.status = BTM_SUCCESS;
if (!is_ble) {
STREAM_TO_UINT16 (handle, p);
STREAM_TO_UINT8 (results.tx_power, p);
/* Search through the list of active channels for the correct BD Addr */
for (index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
memcpy (results.rem_bda, p_acl_cb->remote_addr, BD_ADDR_LEN);
break;
}
}
}
#if BLE_INCLUDED == TRUE
else {
STREAM_TO_UINT8 (results.tx_power, p);
memcpy(results.rem_bda, btm_cb.devcb.read_tx_pwr_addr, BD_ADDR_LEN);
}
#endif
BTM_TRACE_DEBUG ("BTM TX power Complete: tx_power %d, hci status 0x%02x\n",
results.tx_power, results.hci_status);
} else {
results.status = BTM_ERR_PROCESSING;
}
(*p_cb)(&results);
}
}
/*******************************************************************************
**
** Function btm_read_rssi_complete
**
** Description This function is called when the command complete message
** is received from the HCI for the read rssi request.
**
** Returns void
**
*******************************************************************************/
void btm_read_rssi_complete (UINT8 *p)
{
tBTM_CMPL_CB *p_cb = btm_cb.devcb.p_rssi_cmpl_cb;
tBTM_RSSI_RESULTS results;
UINT16 handle;
tACL_CONN *p_acl_cb = &btm_cb.acl_db[0];
UINT16 index;
BTM_TRACE_DEBUG ("btm_read_rssi_complete\n");
btu_stop_timer (&btm_cb.devcb.rssi_timer);
/* If there was a callback registered for read rssi, call it */
btm_cb.devcb.p_rssi_cmpl_cb = NULL;
if (p_cb) {
STREAM_TO_UINT8 (results.hci_status, p);
if (results.hci_status == HCI_SUCCESS) {
results.status = BTM_SUCCESS;
STREAM_TO_UINT16 (handle, p);
STREAM_TO_UINT8 (results.rssi, p);
BTM_TRACE_DEBUG ("BTM RSSI Complete: rssi %d, hci status 0x%02x\n",
results.rssi, results.hci_status);
/* Search through the list of active channels for the correct BD Addr */
for (index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
memcpy (results.rem_bda, p_acl_cb->remote_addr, BD_ADDR_LEN);
break;
}
}
} else {
results.status = BTM_ERR_PROCESSING;
}
(*p_cb)(&results);
}
}
/*******************************************************************************
**
** Function btm_read_link_quality_complete
**
** Description This function is called when the command complete message
** is received from the HCI for the read link quality.
**
** Returns void
**
*******************************************************************************/
void btm_read_link_quality_complete (UINT8 *p)
{
tBTM_CMPL_CB *p_cb = btm_cb.devcb.p_lnk_qual_cmpl_cb;
tBTM_LINK_QUALITY_RESULTS results;
UINT16 handle;
tACL_CONN *p_acl_cb = &btm_cb.acl_db[0];
UINT16 index;
BTM_TRACE_DEBUG ("btm_read_link_quality_complete\n");
btu_stop_timer (&btm_cb.devcb.lnk_quality_timer);
/* If there was a callback registered for read rssi, call it */
btm_cb.devcb.p_lnk_qual_cmpl_cb = NULL;
if (p_cb) {
STREAM_TO_UINT8 (results.hci_status, p);
if (results.hci_status == HCI_SUCCESS) {
results.status = BTM_SUCCESS;
STREAM_TO_UINT16 (handle, p);
STREAM_TO_UINT8 (results.link_quality, p);
BTM_TRACE_DEBUG ("BTM Link Quality Complete: Link Quality %d, hci status 0x%02x\n",
results.link_quality, results.hci_status);
/* Search through the list of active channels for the correct BD Addr */
for (index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
memcpy (results.rem_bda, p_acl_cb->remote_addr, BD_ADDR_LEN);
break;
}
}
} else {
results.status = BTM_ERR_PROCESSING;
}
(*p_cb)(&results);
}
}
/*******************************************************************************
**
** Function btm_remove_acl
**
** Description This function is called to disconnect an ACL connection
**
** Returns BTM_SUCCESS if successfully initiated, otherwise BTM_NO_RESOURCES.
**
*******************************************************************************/
tBTM_STATUS btm_remove_acl (BD_ADDR bd_addr, tBT_TRANSPORT transport)
{
UINT16 hci_handle = BTM_GetHCIConnHandle(bd_addr, transport);
tBTM_STATUS status = BTM_SUCCESS;
BTM_TRACE_DEBUG ("btm_remove_acl\n");
#if BTM_DISC_DURING_RS == TRUE
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);
/* Role Switch is pending, postpone until completed */
if (p_dev_rec && (p_dev_rec->rs_disc_pending == BTM_SEC_RS_PENDING)) {
p_dev_rec->rs_disc_pending = BTM_SEC_DISC_PENDING;
} else /* otherwise can disconnect right away */
#endif
{
if (hci_handle != 0xFFFF && p_dev_rec &&
p_dev_rec->sec_state != BTM_SEC_STATE_DISCONNECTING) {
if (!btsnd_hcic_disconnect (hci_handle, HCI_ERR_PEER_USER)) {
status = BTM_NO_RESOURCES;
}
} else {
status = BTM_UNKNOWN_ADDR;
}
}
return status;
}
/*******************************************************************************
**
** Function BTM_SetTraceLevel
**
** Description This function sets the trace level for BTM. If called with
** a value of 0xFF, it simply returns the current trace level.
**
** Returns The new or current trace level
**
*******************************************************************************/
UINT8 BTM_SetTraceLevel (UINT8 new_level)
{
BTM_TRACE_DEBUG ("BTM_SetTraceLevel\n");
if (new_level != 0xFF) {
btm_cb.trace_level = new_level;
}
return (btm_cb.trace_level);
}
/*******************************************************************************
**
** Function btm_cont_rswitch
**
** Description This function is called to continue processing an active
** role switch. It first disables encryption if enabled and
** EPR is not supported
**
** Returns void
**
*******************************************************************************/
void btm_cont_rswitch (tACL_CONN *p, tBTM_SEC_DEV_REC *p_dev_rec,
UINT8 hci_status)
{
BOOLEAN sw_ok = TRUE;
BTM_TRACE_DEBUG ("btm_cont_rswitch\n");
/* Check to see if encryption needs to be turned off if pending
change of link key or role switch */
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE) {
/* Must turn off Encryption first if necessary */
/* Some devices do not support switch or change of link key while encryption is on */
if (p_dev_rec != NULL && ((p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) != 0)
&& !BTM_EPR_AVAILABLE(p)) {
if (btsnd_hcic_set_conn_encrypt (p->hci_handle, FALSE)) {
p->encrypt_state = BTM_ACL_ENCRYPT_STATE_ENCRYPT_OFF;
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_ENCRYPTION_OFF;
}
} else {
/* Error occurred; set states back to Idle */
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE) {
sw_ok = FALSE;
}
}
} else /* Encryption not used or EPR supported, continue with switch
and/or change of link key */
{
if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_IN_PROGRESS;
#if BTM_DISC_DURING_RS == TRUE
if (p_dev_rec) {
p_dev_rec->rs_disc_pending = BTM_SEC_RS_PENDING;
}
#endif
sw_ok = btsnd_hcic_switch_role (p->remote_addr, (UINT8)!p->link_role);
}
}
if (!sw_ok) {
p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
btm_acl_report_role_change(hci_status, p->remote_addr);
}
}
}
/*******************************************************************************
**
** Function btm_acl_resubmit_page
**
** Description send pending page request
**
*******************************************************************************/
void btm_acl_resubmit_page (void)
{
#if (SMP_INCLUDED == TRUE)
tBTM_SEC_DEV_REC *p_dev_rec;
BT_HDR *p_buf;
UINT8 *pp;
BD_ADDR bda;
BTM_TRACE_DEBUG ("btm_acl_resubmit_page\n");
/* If there were other page request schedule can start the next one */
if ((p_buf = (BT_HDR *)fixed_queue_try_dequeue(btm_cb.page_queue)) != NULL) {
/* skip 3 (2 bytes opcode and 1 byte len) to get to the bd_addr
* for both create_conn and rmt_name */
pp = (UINT8 *)(p_buf + 1) + p_buf->offset + 3;
STREAM_TO_BDADDR (bda, pp);
p_dev_rec = btm_find_or_alloc_dev (bda);
memcpy (btm_cb.connecting_bda, p_dev_rec->bd_addr, BD_ADDR_LEN);
memcpy (btm_cb.connecting_dc, p_dev_rec->dev_class, DEV_CLASS_LEN);
btu_hcif_send_cmd (LOCAL_BR_EDR_CONTROLLER_ID, p_buf);
} else {
btm_cb.paging = FALSE;
}
#endif ///SMP_INCLUDED == TRUE
}
/*******************************************************************************
**
** Function btm_acl_reset_paging
**
** Description set paging to FALSE and free the page queue - called at hci_reset
**
*******************************************************************************/
void btm_acl_reset_paging (void)
{
BT_HDR *p;
BTM_TRACE_DEBUG ("btm_acl_reset_paging\n");
/* If we sent reset we are definitely not paging any more */
while ((p = (BT_HDR *)fixed_queue_try_dequeue(btm_cb.page_queue)) != NULL) {
osi_free (p);
}
btm_cb.paging = FALSE;
}
/*******************************************************************************
**
** Function btm_acl_paging
**
** Description send a paging command or queue it in btm_cb
**
*******************************************************************************/
#if (SMP_INCLUDED == TRUE && CLASSIC_BT_INCLUDED == TRUE)
void btm_acl_paging (BT_HDR *p, BD_ADDR bda)
{
tBTM_SEC_DEV_REC *p_dev_rec;
BTM_TRACE_DEBUG ("btm_acl_paging discing:%d, paging:%d BDA: %06x%06x\n",
btm_cb.discing, btm_cb.paging,
(bda[0] << 16) + (bda[1] << 8) + bda[2], (bda[3] << 16) + (bda[4] << 8) + bda[5]);
if (btm_cb.discing) {
btm_cb.paging = TRUE;
fixed_queue_enqueue(btm_cb.page_queue, p);
} else {
if (!BTM_ACL_IS_CONNECTED (bda)) {
BTM_TRACE_DEBUG ("connecting_bda: %06x%06x\n",
(btm_cb.connecting_bda[0] << 16) + (btm_cb.connecting_bda[1] << 8) +
btm_cb.connecting_bda[2],
(btm_cb.connecting_bda[3] << 16) + (btm_cb.connecting_bda[4] << 8) +
btm_cb.connecting_bda[5]);
if (btm_cb.paging &&
memcmp (bda, btm_cb.connecting_bda, BD_ADDR_LEN) != 0) {
fixed_queue_enqueue(btm_cb.page_queue, p);
} else {
p_dev_rec = btm_find_or_alloc_dev (bda);
memcpy (btm_cb.connecting_bda, p_dev_rec->bd_addr, BD_ADDR_LEN);
memcpy (btm_cb.connecting_dc, p_dev_rec->dev_class, DEV_CLASS_LEN);
btu_hcif_send_cmd (LOCAL_BR_EDR_CONTROLLER_ID, p);
}
btm_cb.paging = TRUE;
} else { /* ACL is already up */
btu_hcif_send_cmd (LOCAL_BR_EDR_CONTROLLER_ID, p);
}
}
}
#endif ///SMP_INCLUDED == TRUE
/*******************************************************************************
**
** Function btm_acl_notif_conn_collision
**
** Description Send connection collision event to upper layer if registered
**
** Returns TRUE if sent out to upper layer,
** FALSE if no one needs the notification.
**
*******************************************************************************/
BOOLEAN btm_acl_notif_conn_collision (BD_ADDR bda)
{
tBTM_BL_EVENT_DATA evt_data;
/* Report possible collision to the upper layer. */
if (btm_cb.p_bl_changed_cb) {
BTM_TRACE_DEBUG ("btm_acl_notif_conn_collision: RemBdAddr: %02x%02x%02x%02x%02x%02x\n",
bda[0], bda[1], bda[2], bda[3], bda[4], bda[5]);
evt_data.event = BTM_BL_COLLISION_EVT;
evt_data.conn.p_bda = bda;
#if BLE_INCLUDED == TRUE
evt_data.conn.transport = BT_TRANSPORT_BR_EDR;
evt_data.conn.handle = BTM_INVALID_HCI_HANDLE;
#endif
(*btm_cb.p_bl_changed_cb)(&evt_data);
return TRUE;
} else {
return FALSE;
}
}
/*******************************************************************************
**
** Function btm_acl_chk_peer_pkt_type_support
**
** Description Check if peer supports requested packets
**
*******************************************************************************/
void btm_acl_chk_peer_pkt_type_support (tACL_CONN *p, UINT16 *p_pkt_type)
{
/* 3 and 5 slot packets? */
if (!HCI_3_SLOT_PACKETS_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])) {
*p_pkt_type &= ~(BTM_ACL_PKT_TYPES_MASK_DH3 + BTM_ACL_PKT_TYPES_MASK_DM3);
}
if (!HCI_5_SLOT_PACKETS_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])) {
*p_pkt_type &= ~(BTM_ACL_PKT_TYPES_MASK_DH5 + BTM_ACL_PKT_TYPES_MASK_DM5);
}
/* 2 and 3 MPS support? */
if (!HCI_EDR_ACL_2MPS_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])) {
/* Not supported. Add 'not_supported' mask for all 2MPS packet types */
*p_pkt_type |= (BTM_ACL_PKT_TYPES_MASK_NO_2_DH1 + BTM_ACL_PKT_TYPES_MASK_NO_2_DH3 +
BTM_ACL_PKT_TYPES_MASK_NO_2_DH5);
}
if (!HCI_EDR_ACL_3MPS_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])) {
/* Not supported. Add 'not_supported' mask for all 3MPS packet types */
*p_pkt_type |= (BTM_ACL_PKT_TYPES_MASK_NO_3_DH1 + BTM_ACL_PKT_TYPES_MASK_NO_3_DH3 +
BTM_ACL_PKT_TYPES_MASK_NO_3_DH5);
}
/* EDR 3 and 5 slot support? */
if (HCI_EDR_ACL_2MPS_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])
|| HCI_EDR_ACL_3MPS_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0])) {
if (!HCI_3_SLOT_EDR_ACL_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0]))
/* Not supported. Add 'not_supported' mask for all 3-slot EDR packet types */
{
*p_pkt_type |= (BTM_ACL_PKT_TYPES_MASK_NO_2_DH3 + BTM_ACL_PKT_TYPES_MASK_NO_3_DH3);
}
if (!HCI_5_SLOT_EDR_ACL_SUPPORTED(p->peer_lmp_features[HCI_EXT_FEATURES_PAGE_0]))
/* Not supported. Add 'not_supported' mask for all 5-slot EDR packet types */
{
*p_pkt_type |= (BTM_ACL_PKT_TYPES_MASK_NO_2_DH5 + BTM_ACL_PKT_TYPES_MASK_NO_3_DH5);
}
}
}
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