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esp-idf/components/bt/host/bluedroid/stack/l2cap/l2c_ble.c

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/******************************************************************************
*
* Copyright (C) 2009-2012 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 relating to BLE management.
*
******************************************************************************/
#include <string.h>
#include "common/bt_target.h"
//#include "bt_utils.h"
#include "stack/l2cdefs.h"
#include "l2c_int.h"
#include "stack/btu.h"
#include "btm_int.h"
#include "stack/hcimsgs.h"
#include "device/controller.h"
#if (BLE_INCLUDED == TRUE)
#if (BLE_50_FEATURE_SUPPORT == TRUE)
#define EXT_CONN_INT_DEF_1M MAX(((MAX_ACL_CONNECTIONS + 1) * 4), 12)
#define EXT_CONN_INT_DEF_2M MAX(((MAX_ACL_CONNECTIONS + 1) * 2), 12)
#define EXT_CONN_INT_DEF_CODED (320) // 306-> 362Kbps
const static tHCI_ExtConnParams ext_conn_params_1m_phy = {
.scan_interval = 0x40,
.scan_window = 0x40,
.conn_interval_min = EXT_CONN_INT_DEF_1M,
.conn_interval_max = EXT_CONN_INT_DEF_1M,
.conn_latency = 0,
.sup_timeout = 600,
.min_ce_len = 0,
.max_ce_len = 0,
};
const static tHCI_ExtConnParams ext_conn_params_2m_phy = {
.scan_interval = 0x40,
.scan_window = 0x40,
.conn_interval_min = EXT_CONN_INT_DEF_2M,
.conn_interval_max = EXT_CONN_INT_DEF_2M,
.conn_latency = 0,
.sup_timeout = 600,
.min_ce_len = 0,
.max_ce_len = 0,
};
const static tHCI_ExtConnParams ext_conn_params_coded_phy = {
.scan_interval = 0x40,
.scan_window = 0x40,
.conn_interval_min = EXT_CONN_INT_DEF_CODED,
.conn_interval_max = EXT_CONN_INT_DEF_CODED,
.conn_latency = 0,
.sup_timeout = 600,
.min_ce_len = 0,
.max_ce_len = 0,
};
#define BLE_PHY_NO_PREF 0
#define BLE_PHY_PREF_MASK ((1 << 2) | (1 << 1) | (1 << 0))
#endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
static BOOLEAN l2cble_start_conn_update (tL2C_LCB *p_lcb);
extern int64_t esp_system_get_time(void);
/*******************************************************************************
**
** Function L2CA_CancelBleConnectReq
**
** Description Cancel a pending connection attempt to a BLE device.
**
** Parameters: BD Address of remote
**
** Return value: TRUE if connection was cancelled
**
*******************************************************************************/
BOOLEAN L2CA_CancelBleConnectReq (BD_ADDR rem_bda)
{
tL2C_LCB *p_lcb;
/* There can be only one BLE connection request outstanding at a time */
if (btm_ble_get_conn_st() == BLE_CONN_IDLE) {
L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - no connection pending");
return (FALSE);
}
if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN)) {
L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - different BDA Connecting: %08x%04x Cancel: %08x%04x",
(l2cb.ble_connecting_bda[0] << 24) + (l2cb.ble_connecting_bda[1] << 16) + (l2cb.ble_connecting_bda[2] << 8) + l2cb.ble_connecting_bda[3],
(l2cb.ble_connecting_bda[4] << 8) + l2cb.ble_connecting_bda[5],
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3], (rem_bda[4] << 8) + rem_bda[5]);
return (FALSE);
}
if (btsnd_hcic_ble_create_conn_cancel()) {
p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_LE);
/* Do not remove lcb if an LE link is already up as a peripheral */
if (p_lcb != NULL &&
!(p_lcb->link_role == HCI_ROLE_SLAVE && BTM_ACL_IS_CONNECTED(rem_bda))) {
p_lcb->disc_reason = L2CAP_CONN_CANCEL;
l2cu_release_lcb (p_lcb);
}
/* update state to be cancel, wait for connection cancel complete */
btm_ble_set_conn_st (BLE_CONN_CANCEL);
return (TRUE);
} else {
return (FALSE);
}
}
/*******************************************************************************
**
** Function L2CA_UpdateBleConnParams
**
** Description Update BLE connection parameters.
**
** Parameters: BD Address of remote
**
** Return value: TRUE if update started
**
*******************************************************************************/
BOOLEAN L2CA_UpdateBleConnParams (BD_ADDR rem_bda, UINT16 min_int, UINT16 max_int,
UINT16 latency, UINT16 timeout)
{
tL2C_LCB *p_lcb;
tACL_CONN *p_acl_cb = btm_bda_to_acl(rem_bda, BT_TRANSPORT_LE);
UINT8 status = HCI_SUCCESS;
BOOLEAN need_cb = false;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE);
/* If we don't have one, create one and accept the connection. */
if (!p_lcb || !p_acl_cb) {
L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - unknown BD_ADDR %08x%04x",
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3],
(rem_bda[4] << 8) + rem_bda[5]);
return (FALSE);
}
if (p_lcb->transport != BT_TRANSPORT_LE) {
L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - BD_ADDR %08x%04x not LE",
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3],
(rem_bda[4] << 8) + rem_bda[5]);
return (FALSE);
}
/* Check whether the request conn params is already set */
if ((max_int == p_lcb->current_used_conn_interval) && (latency == p_lcb->current_used_conn_latency) &&
(timeout == p_lcb->current_used_conn_timeout)) {
status = HCI_SUCCESS;
need_cb = true;
L2CAP_TRACE_WARNING("%s connection parameter already set", __func__);
}
if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PARAM_FULL){
status = HCI_ERR_ILLEGAL_COMMAND;
need_cb = true;
L2CAP_TRACE_ERROR("There are two connection parameter requests that are being updated, please try later ");
}
if ((need_cb == TRUE) && (conn_param_update_cb.update_conn_param_cb != NULL)) {
tBTM_LE_UPDATE_CONN_PRAMS update_param;
update_param.max_conn_int = max_int;
update_param.min_conn_int = min_int;
update_param.conn_int = p_lcb->current_used_conn_interval;
update_param.slave_latency = p_lcb->current_used_conn_latency;
update_param.supervision_tout = p_lcb->current_used_conn_timeout;
(conn_param_update_cb.update_conn_param_cb)(status, p_lcb->remote_bd_addr, &update_param);
return (status == HCI_SUCCESS);
}
p_lcb->waiting_update_conn_min_interval = min_int;
p_lcb->waiting_update_conn_max_interval = max_int;
p_lcb->waiting_update_conn_latency = latency;
p_lcb->waiting_update_conn_timeout = timeout;
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
if(l2cble_start_conn_update(p_lcb) == TRUE) {
UINT32 time = CalConnectParamTimeout(p_lcb);
btu_start_timer(&p_lcb->upda_con_timer, BTU_TTYPE_L2CAP_UPDA_CONN_PARAMS, time);
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_EnableUpdateBleConnParams
**
** Description Enable or disable update based on the request from the peer
**
** Parameters: BD Address of remote
**
** Return value: TRUE if update started
**
*******************************************************************************/
BOOLEAN L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, BOOLEAN enable)
{
tL2C_LCB *p_lcb;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE);
if (!p_lcb) {
L2CAP_TRACE_WARNING ("L2CA_EnableUpdateBleConnParams - unknown BD_ADDR %08x%04x",
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3],
(rem_bda[4] << 8) + rem_bda[5]);
return (FALSE);
}
L2CAP_TRACE_API ("%s - BD_ADDR %08x%04x enable %d current upd state 0x%02x", __FUNCTION__,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3],
(rem_bda[4] << 8) + rem_bda[5], enable, p_lcb->conn_update_mask);
if (p_lcb->transport != BT_TRANSPORT_LE) {
L2CAP_TRACE_WARNING ("%s - BD_ADDR %08x%04x not LE (link role %d)", __FUNCTION__,
(rem_bda[0] << 24) + (rem_bda[1] << 16) + (rem_bda[2] << 8) + rem_bda[3],
(rem_bda[4] << 8) + rem_bda[5], p_lcb->link_role);
return (FALSE);
}
if (p_lcb->current_used_conn_interval <= BTM_BLE_CONN_INT_MAX_DEF && (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0){
return (FALSE);
}
bool is_disable = (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE);
if(l2cu_plcb_active_count() >1 && !(enable && is_disable)) {
return FALSE;
}
if (enable) {
p_lcb->conn_update_mask &= ~L2C_BLE_CONN_UPDATE_DISABLE;
} else {
p_lcb->conn_update_mask |= L2C_BLE_CONN_UPDATE_DISABLE;
}
if (l2cble_start_conn_update(p_lcb) == TRUE) {
UINT32 time = CalConnectParamTimeout(p_lcb);
btu_start_timer(&p_lcb->upda_con_timer, BTU_TTYPE_L2CAP_UPDA_CONN_PARAMS, time);
}
return (TRUE);
}
/*******************************************************************************
**
** Function L2CA_GetBleConnRole
**
** Description This function returns the connection role.
**
** Returns link role.
**
*******************************************************************************/
UINT8 L2CA_GetBleConnRole (BD_ADDR bd_addr)
{
UINT8 role = HCI_ROLE_UNKNOWN;
tL2C_LCB *p_lcb;
if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_LE)) != NULL) {
role = p_lcb->link_role;
}
return role;
}
/*******************************************************************************
**
** Function l2cble_notify_le_connection
**
** Description This function notifiy the l2cap connection to the app layer
**
** Returns none
**
*******************************************************************************/
void l2cble_notify_le_connection (BD_ADDR bda)
{
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
tACL_CONN *p_acl = btm_bda_to_acl(bda, BT_TRANSPORT_LE) ;
if (p_lcb != NULL && p_acl != NULL && p_lcb->link_state != LST_CONNECTED) {
if(p_acl->link_role == HCI_ROLE_SLAVE) {
//clear p_cb->state, controller will stop adv when ble connected.
tBTM_BLE_INQ_CB *p_cb = &btm_cb.ble_ctr_cb.inq_var;
if(p_cb) {
p_cb->adv_mode = BTM_BLE_ADV_DISABLE;
p_cb->state &= ~BTM_BLE_ADVERTISING;
}
}
/* update link status */
btm_establish_continue(p_acl);
/* update l2cap link status and send callback */
p_lcb->link_state = LST_CONNECTED;
l2cu_process_fixed_chnl_resp (p_lcb);
}
}
/*******************************************************************************
**
** Function l2cble_scanner_conn_comp
**
** Description This function is called when an HCI Connection Complete
** event is received while we are a scanner (so we are master).
**
** Returns void
**
*******************************************************************************/
void l2cble_scanner_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
tL2C_LCB *p_lcb;
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda);
L2CAP_TRACE_DEBUG ("l2cble_scanner_conn_comp: HANDLE=%d addr_type=%d conn_interval=%d slave_latency=%d supervision_tout=%d",
handle, type, conn_interval, conn_latency, conn_timeout);
l2cb.is_ble_connecting = FALSE;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
/* If we don't have one, create one. this is auto connection complete. */
if (!p_lcb) {
p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE);
if (!p_lcb) {
#if (SMP_INCLUDED == TRUE)
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_ERROR ("l2cble_scanner_conn_comp - failed to allocate LCB");
#endif ///SMP_INCLUDED == TRUE
return;
} else {
if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) {
#if (SMP_INCLUDED == TRUE)
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
#endif ///SMP_INCLUDED == TRUE
return ;
}
}
} else if (p_lcb->link_state != LST_CONNECTING) {
L2CAP_TRACE_ERROR ("L2CAP got BLE scanner conn_comp in bad state: %d", p_lcb->link_state);
return;
}
btu_stop_timer(&p_lcb->timer_entry);
/* Save the handle */
p_lcb->handle = handle;
/* Connected OK. Change state to connected, we were scanning so we are master */
p_lcb->link_role = HCI_ROLE_MASTER;
p_lcb->transport = BT_TRANSPORT_LE;
/* update link parameter, set slave link as non-spec default upon link up */
p_lcb->waiting_update_conn_min_interval = p_lcb->waiting_update_conn_max_interval = p_lcb->current_used_conn_interval = conn_interval;
p_lcb->waiting_update_conn_timeout = p_lcb->current_used_conn_timeout = conn_timeout;
p_lcb->waiting_update_conn_latency = p_lcb->current_used_conn_latency = conn_latency;
p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;
p_lcb->updating_param_flag = false;
/* If there are any preferred connection parameters, set them now */
if ( (p_dev_rec->conn_params.min_conn_int >= BTM_BLE_CONN_INT_MIN ) &&
(p_dev_rec->conn_params.min_conn_int <= BTM_BLE_CONN_INT_MAX ) &&
(p_dev_rec->conn_params.max_conn_int >= BTM_BLE_CONN_INT_MIN ) &&
(p_dev_rec->conn_params.max_conn_int <= BTM_BLE_CONN_INT_MAX ) &&
(p_dev_rec->conn_params.slave_latency <= BTM_BLE_CONN_LATENCY_MAX ) &&
(p_dev_rec->conn_params.supervision_tout >= BTM_BLE_CONN_SUP_TOUT_MIN) &&
(p_dev_rec->conn_params.supervision_tout <= BTM_BLE_CONN_SUP_TOUT_MAX) &&
((conn_interval < p_dev_rec->conn_params.min_conn_int &&
p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ||
(conn_interval > p_dev_rec->conn_params.max_conn_int) ||
(conn_latency > p_dev_rec->conn_params.slave_latency) ||
(conn_timeout > p_dev_rec->conn_params.supervision_tout))) {
L2CAP_TRACE_ERROR ("upd_ll_conn_params: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d",
handle, p_dev_rec->conn_params.min_conn_int, p_dev_rec->conn_params.max_conn_int,
p_dev_rec->conn_params.slave_latency, p_dev_rec->conn_params.supervision_tout);
p_lcb->waiting_update_conn_min_interval = p_dev_rec->conn_params.min_conn_int;
p_lcb->waiting_update_conn_max_interval = p_dev_rec->conn_params.max_conn_int;
p_lcb->waiting_update_conn_timeout = p_dev_rec->conn_params.supervision_tout;
p_lcb->waiting_update_conn_latency = p_dev_rec->conn_params.slave_latency;
btsnd_hcic_ble_upd_ll_conn_params (handle,
p_dev_rec->conn_params.min_conn_int,
p_dev_rec->conn_params.max_conn_int,
p_dev_rec->conn_params.slave_latency,
p_dev_rec->conn_params.supervision_tout,
BLE_CE_LEN_MIN, BLE_CE_LEN_MIN);
}
/* Tell BTM Acl management about the link */
btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE);
p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;
btm_ble_set_conn_st(BLE_CONN_IDLE);
#if BLE_PRIVACY_SPT == TRUE
btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, TRUE);
#endif
}
/*******************************************************************************
**
** Function l2cble_advertiser_conn_comp
**
** Description This function is called when an HCI Connection Complete
** event is received while we are an advertiser (so we are slave).
**
** Returns void
**
*******************************************************************************/
void l2cble_advertiser_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
tL2C_LCB *p_lcb;
tBTM_SEC_DEV_REC *p_dev_rec;
UNUSED(type);
UNUSED(conn_interval);
UNUSED(conn_latency);
UNUSED(conn_timeout);
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
/* If we don't have one, create one and accept the connection. */
if (!p_lcb) {
p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE);
if (!p_lcb) {
#if (SMP_INCLUDED == TRUE)
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
#endif ///SMP_INCLUDED == TRUE
L2CAP_TRACE_ERROR ("l2cble_advertiser_conn_comp - failed to allocate LCB");
return;
} else {
if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts)) {
#if (SMP_INCLUDED == TRUE)
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
#endif ///SMP_INCLUDED == TRUE
L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
return ;
}
}
}
/* Save the handle */
p_lcb->handle = handle;
/* Connected OK. Change state to connected, we were advertising, so we are slave */
p_lcb->link_role = HCI_ROLE_SLAVE;
p_lcb->transport = BT_TRANSPORT_LE;
/* update link parameter, set slave link as non-spec default upon link up */
p_lcb->waiting_update_conn_min_interval = p_lcb->waiting_update_conn_max_interval = p_lcb->current_used_conn_interval = conn_interval;
p_lcb->waiting_update_conn_timeout = p_lcb->current_used_conn_timeout = conn_timeout;
p_lcb->waiting_update_conn_latency = p_lcb->current_used_conn_latency = conn_latency;
p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;
p_lcb->updating_param_flag = false;
/* Tell BTM Acl management about the link */
p_dev_rec = btm_find_or_alloc_dev (bda);
btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE);
#if BLE_PRIVACY_SPT == TRUE
btm_ble_disable_resolving_list(BTM_BLE_RL_ADV, TRUE);
#endif
p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;
if (!HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(controller_get_interface()->get_features_ble()->as_array)) {
p_lcb->link_state = LST_CONNECTED;
l2cu_process_fixed_chnl_resp (p_lcb);
}
/* when adv and initiating are both active, cancel the direct connection */
if (l2cb.is_ble_connecting && memcmp(bda, l2cb.ble_connecting_bda, BD_ADDR_LEN) == 0) {
L2CA_CancelBleConnectReq(bda);
}
}
/*******************************************************************************
**
** Function l2cble_conn_comp
**
** Description This function is called when an HCI Connection Complete
** event is received.
**
** Returns void
**
*******************************************************************************/
void l2cble_conn_comp(UINT16 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type,
UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
{
btm_ble_update_link_topology_mask(role, TRUE);
if (role == HCI_ROLE_MASTER) {
l2cble_scanner_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
} else {
l2cble_advertiser_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
}
}
/*******************************************************************************
**
** Function l2cble_start_conn_update
**
** Description start BLE connection parameter update process based on status
**
** Parameters: lcb : l2cap link control block
**
** Return value: true if successfully sending the request to peer device, else false.
**
*******************************************************************************/
static BOOLEAN l2cble_start_conn_update (tL2C_LCB *p_lcb)
{
UINT16 min_conn_int, max_conn_int, slave_latency, supervision_tout;
#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) && (BLE_SLAVE_UPD_CONN_PARAMS == TRUE)
tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE);
#endif /* defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) && (BLE_SLAVE_UPD_CONN_PARAMS == TRUE */
if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) {
L2CAP_TRACE_WARNING("%s, the last connection update command still pending.", __func__);
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PARAM_FULL;
return FALSE;
}
if (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) {
/* application requests to disable parameters update.
If parameters are already updated, lets set them
up to what has been requested during connection establishement */
if (p_lcb->conn_update_mask & L2C_BLE_NOT_DEFAULT_PARAM &&
/* current connection interval is greater than default min */
p_lcb->current_used_conn_interval > BTM_BLE_CONN_INT_MAX_DEF) {
/* use 6 * 1.25 = 7.5 ms as fast connection parameter, 0 slave latency */
min_conn_int = max_conn_int = BTM_BLE_CONN_INT_MIN;
slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF;
supervision_tout = BTM_BLE_CONN_TIMEOUT_DEF;
/* if both side 4.1, or we are master device, send HCI command */
if (p_lcb->link_role == HCI_ROLE_MASTER
#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) && (BLE_SLAVE_UPD_CONN_PARAMS == TRUE)
|| (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) &&
HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features))
#endif
) {
btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, min_conn_int, max_conn_int,
slave_latency, supervision_tout, BLE_CE_LEN_MIN, BLE_CE_LEN_MIN);
} else {
l2cu_send_peer_ble_par_req (p_lcb, min_conn_int, max_conn_int, slave_latency, supervision_tout);
}
//cache save
p_lcb->updating_conn_min_interval = min_conn_int;
p_lcb->updating_conn_max_interval = max_conn_int;
p_lcb->updating_param_flag = true;
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
p_lcb->conn_update_mask &= ~L2C_BLE_NOT_DEFAULT_PARAM;
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
return TRUE;
}else {
return FALSE;
}
} else {
/* application allows to do update, if we were delaying one do it now */
if (p_lcb->conn_update_mask & L2C_BLE_NEW_CONN_PARAM) {
/* if both side 4.1, or we are master device, send HCI command */
if (p_lcb->link_role == HCI_ROLE_MASTER
#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE) && (BLE_SLAVE_UPD_CONN_PARAMS == TRUE)
|| (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) &&
HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features))
#endif
) {
btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, p_lcb->waiting_update_conn_min_interval,
p_lcb->waiting_update_conn_max_interval, p_lcb->waiting_update_conn_latency, p_lcb->waiting_update_conn_timeout, BLE_CE_LEN_MIN, BLE_CE_LEN_MIN);
} else {
l2cu_send_peer_ble_par_req (p_lcb, p_lcb->waiting_update_conn_min_interval, p_lcb->waiting_update_conn_max_interval,
p_lcb->waiting_update_conn_latency, p_lcb->waiting_update_conn_timeout);
}
//cache save
p_lcb->updating_conn_min_interval = p_lcb->waiting_update_conn_min_interval;
p_lcb->updating_conn_max_interval = p_lcb->waiting_update_conn_max_interval;
p_lcb->updating_param_flag = true;
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
p_lcb->conn_update_mask &= ~L2C_BLE_NEW_CONN_PARAM;
p_lcb->conn_update_mask |= L2C_BLE_NOT_DEFAULT_PARAM;
return TRUE;
} else {
return FALSE;
}
}
}
/*******************************************************************************
**
** Function l2cble_process_conn_update_evt
**
** Description This function enables the connection update request from remote
** after a successful connection update response is received.
**
** Returns void
**
*******************************************************************************/
void l2cble_process_conn_update_evt (UINT16 handle, UINT8 status, UINT16 conn_interval,
UINT16 conn_latency, UINT16 conn_timeout)
{
tL2C_LCB *p_lcb;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_handle(handle);
if (!p_lcb) {
L2CAP_TRACE_WARNING("le con upd: inv hdl=%d", handle);
return;
}
if (status == HCI_SUCCESS){
p_lcb->current_used_conn_interval = conn_interval;
p_lcb->current_used_conn_latency = conn_latency;
p_lcb->current_used_conn_timeout = conn_timeout;
}else{
L2CAP_TRACE_WARNING("le con upd: err_stat=0x%x", status);
}
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING;
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PARAM_FULL;
btu_stop_timer(&p_lcb->upda_con_timer);
if (conn_param_update_cb.update_conn_param_cb != NULL) {
l2c_send_update_conn_params_cb(p_lcb, status);
}
if (l2cble_start_conn_update(p_lcb) == TRUE) {
UINT32 time = CalConnectParamTimeout(p_lcb);
btu_start_timer(&p_lcb->upda_con_timer, BTU_TTYPE_L2CAP_UPDA_CONN_PARAMS, time);
}
btu_stop_timer (&p_lcb->timer_entry);
L2CAP_TRACE_DEBUG("le con upd: conn_update_mask=%d", p_lcb->conn_update_mask);
}
/*******************************************************************************
**
** Function l2cble_get_conn_param_format_err_from_contoller
**
** Description This function is called when host get illegal connection paramrters
** format status from controller
**
** Returns void
**
*******************************************************************************/
void l2cble_get_conn_param_format_err_from_contoller (UINT8 status, UINT16 handle)
{
tL2C_LCB *p_lcb;
/* See if we have a link control block for the remote device */
p_lcb = l2cu_find_lcb_by_handle(handle);
if (!p_lcb) {
L2CAP_TRACE_ERROR("%s: Invalid handle: %d", __FUNCTION__, handle);
return;
}
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING;
btu_stop_timer (&p_lcb->upda_con_timer);
if (conn_param_update_cb.update_conn_param_cb != NULL) {
l2c_send_update_conn_params_cb(p_lcb, status);
}
if ((p_lcb->conn_update_mask & L2C_BLE_UPDATE_PARAM_FULL) != 0){
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PARAM_FULL;
if (l2cble_start_conn_update(p_lcb) == TRUE) {
UINT32 time = CalConnectParamTimeout(p_lcb);
btu_start_timer(&p_lcb->upda_con_timer, BTU_TTYPE_L2CAP_UPDA_CONN_PARAMS, time);
}
}
}
/*******************************************************************************
**
** Function l2cble_process_sig_cmd
**
** Description This function is called when a signalling packet is received
** on the BLE signalling CID
**
** Returns void
**
*******************************************************************************/
void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len)
{
UINT8 *p_pkt_end;
UINT8 cmd_code, id;
UINT16 cmd_len;
UINT16 min_interval, max_interval, latency, timeout;
p_pkt_end = p + pkt_len;
STREAM_TO_UINT8 (cmd_code, p);
STREAM_TO_UINT8 (id, p);
STREAM_TO_UINT16 (cmd_len, p);
/* Check command length does not exceed packet length */
if ((p + cmd_len) > p_pkt_end) {
L2CAP_TRACE_WARNING ("L2CAP - LE - format error, pkt_len: %d cmd_len: %d code: %d", pkt_len, cmd_len, cmd_code);
return;
}
switch (cmd_code) {
case L2CAP_CMD_REJECT:
case L2CAP_CMD_ECHO_RSP:
case L2CAP_CMD_INFO_RSP:
p += 2;
break;
case L2CAP_CMD_ECHO_REQ:
case L2CAP_CMD_INFO_REQ:
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
break;
case L2CAP_CMD_BLE_UPDATE_REQ:
STREAM_TO_UINT16 (min_interval, p); /* 0x0006 - 0x0C80 */
STREAM_TO_UINT16 (max_interval, p); /* 0x0006 - 0x0C80 */
STREAM_TO_UINT16 (latency, p); /* 0x0000 - 0x03E8 */
STREAM_TO_UINT16 (timeout, p); /* 0x000A - 0x0C80 */
/* If we are a master, the slave wants to update the parameters */
if (p_lcb->link_role == HCI_ROLE_MASTER) {
if (min_interval < BTM_BLE_CONN_INT_MIN || min_interval > BTM_BLE_CONN_INT_MAX ||
max_interval < BTM_BLE_CONN_INT_MIN || max_interval > BTM_BLE_CONN_INT_MAX ||
latency > BTM_BLE_CONN_LATENCY_MAX ||
timeout < BTM_BLE_CONN_SUP_TOUT_MIN || timeout > BTM_BLE_CONN_SUP_TOUT_MAX ||
/* The supervision_timeout parameter defines the link supervision timeout for the connection.
The supervision_timeout in milliseconds shall be large than (1 + latency) * max_interval * 2,
where max_interval is given in milliseconds. (See [Vol 6] Part B, Section 4.5.2).
supervision_timeout (mult of 10ms); conn_interval (mult of 1.25ms)
(max_interval * 1.25 * 2) replaced by ((max_interval * 5) >> 1).
*/
((timeout * 10) < ((1 + latency) *((max_interval * 5) >> 1))) ||
max_interval < min_interval) {
l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_UNACCEPTABLE_PARAMS, id);
L2CAP_TRACE_ERROR("slave connection parameters update failed, the parameters are out of range");
} else {
l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id);
p_lcb->waiting_update_conn_min_interval = min_interval;
p_lcb->waiting_update_conn_max_interval = max_interval;
p_lcb->waiting_update_conn_latency = latency;
p_lcb->waiting_update_conn_timeout = timeout;
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
if (l2cble_start_conn_update(p_lcb) == TRUE) {
UINT32 time = CalConnectParamTimeout(p_lcb);
btu_start_timer(&p_lcb->upda_con_timer, BTU_TTYPE_L2CAP_UPDA_CONN_PARAMS, time);
}
}
} else {
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
}
break;
case L2CAP_CMD_BLE_UPDATE_RSP: {
UINT16 result = 0;
STREAM_TO_UINT16(result, p); //result = 0 connection param accepted, result = 1 connection param rejected.
UINT8 status = (result == 0) ? HCI_SUCCESS : HCI_ERR_PARAM_OUT_OF_RANGE;
if (status != HCI_SUCCESS) {
btu_stop_timer(&p_lcb->upda_con_timer);
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING;
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PARAM_FULL;
l2c_send_update_conn_params_cb(p_lcb, status);
}
break;
}
default:
L2CAP_TRACE_WARNING ("L2CAP - LE - unknown cmd code: %d", cmd_code);
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
return;
}
}
/*******************************************************************************
**
** Function l2cble_init_direct_conn
**
** Description This function is to initate a direct connection
**
** Returns TRUE connection initiated, FALSE otherwise.
**
*******************************************************************************/
BOOLEAN l2cble_init_direct_conn (tL2C_LCB *p_lcb)
{
#if ( (defined BLE_PRIVACY_SPT) && (BLE_PRIVACY_SPT == TRUE) && (!CONTROLLER_RPA_LIST_ENABLE))
//check for security device information in the cache
bool dev_rec_exist = true;
tBTM_SEC_DEV_REC *find_dev_rec = btm_find_dev (p_lcb->remote_bd_addr);
if(find_dev_rec == NULL) {
dev_rec_exist = false;
}
#endif // ( (defined BLE_PRIVACY_SPT) && (BLE_PRIVACY_SPT == TRUE) && (!CONTROLLER_RPA_LIST_ENABLE))
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_lcb->remote_bd_addr);
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT16 scan_int;
UINT16 scan_win;
BD_ADDR peer_addr;
UINT8 peer_addr_type = BLE_ADDR_PUBLIC;
UINT8 own_addr_type = BLE_ADDR_PUBLIC;
/* There can be only one BLE connection request outstanding at a time */
if (p_dev_rec == NULL) {
L2CAP_TRACE_WARNING ("unknown device, can not initate connection");
return (FALSE);
}
scan_int = (p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int;
scan_win = (p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win;
peer_addr_type = p_lcb->ble_addr_type;
memcpy(peer_addr, p_lcb->remote_bd_addr, BD_ADDR_LEN);
#if ( (defined BLE_PRIVACY_SPT) && (BLE_PRIVACY_SPT == TRUE))
own_addr_type = btm_cb.ble_ctr_cb.addr_mgnt_cb.own_addr_type;
#if (!CONTROLLER_RPA_LIST_ENABLE)
if(dev_rec_exist) {
// if the current address information is valid, get the real address information
if(p_dev_rec->ble.current_addr_valid) {
peer_addr_type = p_dev_rec->ble.current_addr_type;
memcpy(peer_addr, p_dev_rec->ble.current_addr, 6);
} else {
/* find security device information but not find the real address information
* This state may be directly open without scanning. In this case, you must
* use the current adv address of the device to open*/
}
} else {
//not find security device information, We think this is a new device, connect directly
}
/* It will cause that scanner doesn't send scan request to advertiser
* which has sent IRK to us and we have stored the IRK in controller.
* It is a hardware limitation. The preliminary solution is not to
* send key to the controller, but to resolve the random address in host.
* so we need send the real address information to controller. */
#endif // (!CONTROLLER_RPA_LIST_ENABLE)
#if (CONTROLLER_RPA_LIST_ENABLE)
if (p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT) {
if (btm_cb.ble_ctr_cb.privacy_mode >= BTM_PRIVACY_1_2) {
own_addr_type |= BLE_ADDR_TYPE_ID_BIT;
}
//btm_ble_enable_resolving_list(BTM_BLE_RL_INIT);
btm_random_pseudo_to_identity_addr(peer_addr, &peer_addr_type);
} else {
btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, TRUE);
}
#endif // CONTROLLER_RPA_LIST_ENABLE
#endif // (defined BLE_PRIVACY_SPT) && (BLE_PRIVACY_SPT == TRUE)
if (!btm_ble_topology_check(BTM_BLE_STATE_INIT)) {
l2cu_release_lcb (p_lcb);
L2CAP_TRACE_ERROR("initate direct connection fail, topology limitation");
return FALSE;
}
uint32_t link_timeout = L2CAP_BLE_LINK_CONNECT_TOUT;
if(GATTC_CONNECT_RETRY_COUNT) {
if(!p_lcb->retry_create_con) {
p_lcb->start_time_s = (esp_system_get_time()/1000);
}
uint32_t current_time = (esp_system_get_time()/1000);
link_timeout = (L2CAP_BLE_LINK_CONNECT_TOUT*1000 - (current_time - p_lcb->start_time_s))/1000;
if(link_timeout == 0 || link_timeout > L2CAP_BLE_LINK_CONNECT_TOUT) {
link_timeout = L2CAP_BLE_LINK_CONNECT_TOUT;
}
}
if (!p_lcb->is_aux) {
if (!btsnd_hcic_ble_create_ll_conn (scan_int,/* UINT16 scan_int */
scan_win, /* UINT16 scan_win */
FALSE, /* UINT8 white_list */
peer_addr_type, /* UINT8 addr_type_peer */
peer_addr, /* BD_ADDR bda_peer */
own_addr_type, /* UINT8 addr_type_own */
(UINT16) ((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ?
p_dev_rec->conn_params.min_conn_int : BTM_BLE_CONN_INT_MIN_DEF), /* UINT16 conn_int_min */
(UINT16) ((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ?
p_dev_rec->conn_params.max_conn_int : BTM_BLE_CONN_INT_MAX_DEF), /* UINT16 conn_int_max */
(UINT16) ((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ?
p_dev_rec->conn_params.slave_latency : BTM_BLE_CONN_SLAVE_LATENCY_DEF), /* UINT16 conn_latency */
(UINT16) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ?
p_dev_rec->conn_params.supervision_tout : BTM_BLE_CONN_TIMEOUT_DEF), /* conn_timeout */
BLE_CE_LEN_MIN, /* UINT16 min_len */
BLE_CE_LEN_MIN)) { /* UINT16 max_len */
l2cu_release_lcb (p_lcb);
L2CAP_TRACE_ERROR("initate direct connection fail, no resources");
return (FALSE);
} else {
p_lcb->link_state = LST_CONNECTING;
l2cb.is_ble_connecting = TRUE;
memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN);
btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, link_timeout);
btm_ble_set_conn_st (BLE_DIR_CONN);
return (TRUE);
}
} else {
#if (BLE_50_FEATURE_SUPPORT == TRUE)
/*
* 0x00 Public Device Address
* 0x01 Random Device Address
* 0x02 Public Identity Address (corresponds to Resolved Private Address)
* 0x03 Random (static) Identity Address (corresponds to Resolved Private Address)
* 0xFF No address provided (anonymous advertisement)
*/
if ((peer_addr_type & BLE_ADDR_RANDOM) == BLE_ADDR_RANDOM) {
peer_addr_type = BLE_ADDR_RANDOM;
} else {
peer_addr_type = BLE_ADDR_PUBLIC;
}
tHCI_CreatExtConn aux_conn = {0};
aux_conn.filter_policy = FALSE;
aux_conn.own_addr_type = own_addr_type;
aux_conn.peer_addr_type = peer_addr_type;
memcpy(aux_conn.peer_addr, peer_addr, sizeof(BD_ADDR));
if (p_dev_rec->ext_conn_params.phy_mask == BLE_PHY_NO_PREF) {
L2CAP_TRACE_WARNING("No extend connection parameters set, use default parameters");
aux_conn.init_phy_mask = BLE_PHY_PREF_MASK;
memcpy(&aux_conn.params[0], &ext_conn_params_1m_phy, sizeof(tHCI_ExtConnParams));
memcpy(&aux_conn.params[1], &ext_conn_params_2m_phy, sizeof(tHCI_ExtConnParams));
memcpy(&aux_conn.params[2], &ext_conn_params_coded_phy, sizeof(tHCI_ExtConnParams));
} else {
aux_conn.init_phy_mask = p_dev_rec->ext_conn_params.phy_mask;
memcpy(&aux_conn.params[0], &p_dev_rec->ext_conn_params.phy_1m_conn_params, sizeof(tHCI_ExtConnParams));
memcpy(&aux_conn.params[1], &p_dev_rec->ext_conn_params.phy_2m_conn_params, sizeof(tHCI_ExtConnParams));
memcpy(&aux_conn.params[2], &p_dev_rec->ext_conn_params.phy_coded_conn_params, sizeof(tHCI_ExtConnParams));
}
p_lcb->link_state = LST_CONNECTING;
l2cb.is_ble_connecting = TRUE;
memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN);
btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, link_timeout);
btm_ble_set_conn_st (BLE_DIR_CONN);
if(!btsnd_hcic_ble_create_ext_conn(&aux_conn)) {
l2cu_release_lcb (p_lcb);
L2CAP_TRACE_ERROR("initate Aux connection failed, no resources");
}
#else
L2CAP_TRACE_ERROR("BLE 5.0 not support!\n");
#endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
return (TRUE);
}
}
/*******************************************************************************
**
** Function l2cble_create_conn
**
** Description This function initiates an acl connection via HCI
**
** Returns TRUE if successful, FALSE if connection not started.
**
*******************************************************************************/
BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb)
{
tBTM_BLE_CONN_ST conn_st = btm_ble_get_conn_st();
BOOLEAN rt = FALSE;
/* There can be only one BLE connection request outstanding at a time */
if (conn_st == BLE_CONN_IDLE) {
rt = l2cble_init_direct_conn(p_lcb);
} else {
L2CAP_TRACE_WARNING ("L2CAP - LE - cannot start new connection at conn st: %d", conn_st);
btm_ble_enqueue_direct_conn_req(p_lcb);
if (conn_st == BLE_BG_CONN) {
btm_ble_suspend_bg_conn();
}
rt = TRUE;
}
return rt;
}
/*******************************************************************************
**
** Function l2c_link_processs_ble_num_bufs
**
** Description This function is called when a "controller buffer size"
** event is first received from the controller. It updates
** the L2CAP values.
**
** Returns void
**
*******************************************************************************/
void l2c_link_processs_ble_num_bufs (UINT16 num_lm_ble_bufs)
{
if (num_lm_ble_bufs == 0) {
num_lm_ble_bufs = L2C_DEF_NUM_BLE_BUF_SHARED;
l2cb.num_lm_acl_bufs -= L2C_DEF_NUM_BLE_BUF_SHARED;
}
L2CAP_TRACE_DEBUG("num_lm_ble_bufs = %d",num_lm_ble_bufs);
l2cb.num_lm_ble_bufs = l2cb.controller_le_xmit_window = num_lm_ble_bufs;
}
/*******************************************************************************
**
** Function l2c_ble_link_adjust_allocation
**
** Description This function is called when a link is created or removed
** to calculate the amount of packets each link may send to
** the HCI without an ack coming back.
**
** Currently, this is a simple allocation, dividing the
** number of Controller Packets by the number of links. In
** the future, QOS configuration should be examined.
**
** Returns void
**
*******************************************************************************/
void l2c_ble_link_adjust_allocation (void)
{
UINT16 qq, qq_remainder;
tL2C_LCB *p_lcb;
UINT16 hi_quota, low_quota;
UINT16 num_lowpri_links = 0;
UINT16 num_hipri_links = 0;
UINT16 controller_xmit_quota = l2cb.num_lm_ble_bufs;
UINT16 high_pri_link_quota = L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A;
list_node_t *p_node = NULL;
/* If no links active, reset buffer quotas and controller buffers */
if (l2cb.num_ble_links_active == 0) {
l2cb.controller_le_xmit_window = l2cb.num_lm_ble_bufs;
l2cb.ble_round_robin_quota = l2cb.ble_round_robin_unacked = 0;
return;
}
/* First, count the links */
for (p_node = list_begin(l2cb.p_lcb_pool); p_node; p_node = list_next(p_node)) {
p_lcb = list_node(p_node);
if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE) {
if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) {
num_hipri_links++;
} else {
num_lowpri_links++;
}
}
}
/* now adjust high priority link quota */
low_quota = num_lowpri_links ? 1 : 0;
while ( (num_hipri_links * high_pri_link_quota + low_quota) > controller_xmit_quota ) {
high_pri_link_quota--;
}
/* Work out the xmit quota and buffer quota high and low priorities */
hi_quota = num_hipri_links * high_pri_link_quota;
low_quota = (hi_quota < controller_xmit_quota) ? controller_xmit_quota - hi_quota : 1;
/* Work out and save the HCI xmit quota for each low priority link */
/* If each low priority link cannot have at least one buffer */
if (num_lowpri_links > low_quota) {
l2cb.ble_round_robin_quota = low_quota;
qq = qq_remainder = 0;
}
/* If each low priority link can have at least one buffer */
else if (num_lowpri_links > 0) {
l2cb.ble_round_robin_quota = 0;
l2cb.ble_round_robin_unacked = 0;
qq = low_quota / num_lowpri_links;
qq_remainder = low_quota % num_lowpri_links;
}
/* If no low priority link */
else {
l2cb.ble_round_robin_quota = 0;
l2cb.ble_round_robin_unacked = 0;
qq = qq_remainder = 0;
}
L2CAP_TRACE_EVENT ("l2c_ble_link_adjust_allocation num_hipri: %u num_lowpri: %u low_quota: %u round_robin_quota: %u qq: %u",
num_hipri_links, num_lowpri_links, low_quota,
l2cb.ble_round_robin_quota, qq);
/* Now, assign the quotas to each link */
p_node = NULL;
for (p_node = list_begin(l2cb.p_lcb_pool); p_node; p_node = list_next(p_node)) {
p_lcb = list_node(p_node);
if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE) {
if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH) {
p_lcb->link_xmit_quota = high_pri_link_quota;
} else {
/* Safety check in case we switched to round-robin with something outstanding */
/* if sent_not_acked is added into round_robin_unacked then don't add it again */
/* l2cap keeps updating sent_not_acked for exiting from round robin */
if (( p_lcb->link_xmit_quota > 0 ) && ( qq == 0 )) {
l2cb.ble_round_robin_unacked += p_lcb->sent_not_acked;
}
p_lcb->link_xmit_quota = qq;
if (qq_remainder > 0) {
p_lcb->link_xmit_quota++;
qq_remainder--;
}
}
L2CAP_TRACE_EVENT("l2c_ble_link_adjust_allocation Priority: %d XmitQuota: %d",
p_lcb->acl_priority, p_lcb->link_xmit_quota);
L2CAP_TRACE_EVENT(" SentNotAcked: %d RRUnacked: %d",
p_lcb->sent_not_acked, l2cb.round_robin_unacked);
/* There is a special case where we have readjusted the link quotas and */
/* this link may have sent anything but some other link sent packets so */
/* so we may need a timer to kick off this link's transmissions. */
if ( (p_lcb->link_state == LST_CONNECTED)
&& (!list_is_empty(p_lcb->link_xmit_data_q))
&& (p_lcb->sent_not_acked < p_lcb->link_xmit_quota) ) {
btu_start_timer (&p_lcb->timer_entry, BTU_TTYPE_L2CAP_LINK, L2CAP_LINK_FLOW_CONTROL_TOUT);
}
}
}
}
#if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
/*******************************************************************************
**
** Function l2cble_process_rc_param_request_evt
**
** Description process LE Remote Connection Parameter Request Event.
**
** Returns void
**
*******************************************************************************/
void l2cble_process_rc_param_request_evt(UINT16 handle, UINT16 int_min, UINT16 int_max,
UINT16 latency, UINT16 timeout)
{
tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle (handle);
if (p_lcb != NULL) {
/* if update is enabled, always accept connection parameter update */
if ((p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0) {
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, BLE_CE_LEN_MIN, BLE_CE_LEN_MIN);
}else {
/* always accept connection parameters request which is sent by itself */
if (int_max == BTM_BLE_CONN_INT_MIN) {
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, BLE_CE_LEN_MIN, BLE_CE_LEN_MIN);
}else {
L2CAP_TRACE_EVENT ("L2CAP - LE - update currently disabled");
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
btsnd_hcic_ble_rc_param_req_neg_reply (handle, HCI_ERR_UNACCEPT_CONN_INTERVAL);
}
}
} else {
L2CAP_TRACE_WARNING("No link to update connection parameter")
}
}
#endif
/*******************************************************************************
**
** Function l2cble_update_data_length
**
** Description This function update link tx data length if applicable
**
** Returns void
**
*******************************************************************************/
void l2cble_update_data_length(tL2C_LCB *p_lcb)
{
UINT16 tx_mtu = 0;
UINT16 i = 0;
L2CAP_TRACE_DEBUG("%s", __FUNCTION__);
/* See if we have a link control block for the connection */
if (p_lcb == NULL) {
return;
}
for (i = 0; i < L2CAP_NUM_FIXED_CHNLS; i++) {
if (i + L2CAP_FIRST_FIXED_CHNL != L2CAP_BLE_SIGNALLING_CID) {
if ((p_lcb->p_fixed_ccbs[i] != NULL) &&
(tx_mtu < (p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD))) {
tx_mtu = p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD;
}
}
}
if (tx_mtu > BTM_BLE_DATA_SIZE_MAX) {
tx_mtu = BTM_BLE_DATA_SIZE_MAX;
}
/* update TX data length if changed */
if (p_lcb->tx_data_len != tx_mtu) {
BTM_SetBleDataLength(p_lcb->remote_bd_addr, tx_mtu);
}
}
/*******************************************************************************
**
** Function l2cble_process_data_length_change_evt
**
** Description This function process the data length change event
**
** Returns void
**
*******************************************************************************/
void l2cble_process_data_length_change_event(UINT16 handle, UINT16 tx_data_len, UINT16 rx_data_len)
{
tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle);
tACL_CONN *p_acl = btm_handle_to_acl(handle);
tBTM_LE_SET_PKT_DATA_LENGTH_PARAMS data_length_params;
L2CAP_TRACE_DEBUG("%s TX data len = %d", __FUNCTION__, tx_data_len);
if (p_lcb == NULL) {
return;
}
if (tx_data_len > 0) {
p_lcb->tx_data_len = tx_data_len;
}
data_length_params.rx_len = rx_data_len;
data_length_params.tx_len = tx_data_len;
if(p_acl) {
p_acl->data_length_params = data_length_params;
if (p_acl->p_set_pkt_data_cback) {
(*p_acl->p_set_pkt_data_cback)(BTM_SUCCESS, &data_length_params);
}
p_acl->data_len_updating = false;
if(p_acl->data_len_waiting) {
p_acl->data_len_waiting = false;
p_acl->p_set_pkt_data_cback = p_acl->p_set_data_len_cback_waiting;
p_acl->p_set_data_len_cback_waiting = NULL;
// if value is same, triger callback directly
if(p_acl->tx_len_waiting == p_acl->data_length_params.tx_len) {
if(p_acl->p_set_pkt_data_cback) {
(*p_acl->p_set_pkt_data_cback)(BTM_SUCCESS, &p_acl->data_length_params);
}
return;
}
p_acl->data_len_updating = true;
/* always set the TxTime to be max, as controller does not care for now */
btsnd_hcic_ble_set_data_length(handle, p_acl->tx_len_waiting,
BTM_BLE_DATA_TX_TIME_MAX);
}
}
}
/*******************************************************************************
**
** Function l2cble_set_fixed_channel_tx_data_length
**
** Description This function update max fixed channel tx data length if applicable
**
** Returns void
**
*******************************************************************************/
void l2cble_set_fixed_channel_tx_data_length(BD_ADDR remote_bda, UINT16 fix_cid, UINT16 tx_mtu)
{
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(remote_bda, BT_TRANSPORT_LE);
UINT16 cid = fix_cid - L2CAP_FIRST_FIXED_CHNL;
L2CAP_TRACE_DEBUG("%s TX MTU = %d", __FUNCTION__, tx_mtu);
if (!controller_get_interface()->supports_ble_packet_extension()) {
L2CAP_TRACE_WARNING("%s, request not supported", __FUNCTION__);
return;
}
/* See if we have a link control block for the connection */
if (p_lcb == NULL) {
return;
}
if (p_lcb->p_fixed_ccbs[cid] != NULL) {
if (tx_mtu > BTM_BLE_DATA_SIZE_MAX) {
tx_mtu = BTM_BLE_DATA_SIZE_MAX;
}
p_lcb->p_fixed_ccbs[cid]->tx_data_len = tx_mtu;
}
l2cble_update_data_length(p_lcb);
}
/*******************************************************************************
**
** Function l2c_send_update_conn_params_cb
**
** Description This function send the update connection parameter callback to the uplayer.
**
** Returns void
**
*******************************************************************************/
void l2c_send_update_conn_params_cb(tL2C_LCB *p_lcb, UINT8 status)
{
if(conn_param_update_cb.update_conn_param_cb != NULL){
tBTM_LE_UPDATE_CONN_PRAMS update_param;
//if myself update the connection parameters
if (p_lcb->updating_param_flag){
update_param.max_conn_int = p_lcb->updating_conn_max_interval;
update_param.min_conn_int = p_lcb->updating_conn_min_interval;
p_lcb->updating_param_flag = false;
}else{
// remote device update the connection parameters
update_param.max_conn_int = update_param.min_conn_int = 0;
}
// current connection parameters
update_param.conn_int = p_lcb->current_used_conn_interval;
update_param.slave_latency = p_lcb->current_used_conn_latency;
update_param.supervision_tout = p_lcb->current_used_conn_timeout;
(conn_param_update_cb.update_conn_param_cb)(status, p_lcb->remote_bd_addr, &update_param);
}
}
/*******************************************************************************
**
** Function CalConnectParamTimeout
**
** Description This function is called to calculate the connection parameter timeout.
**
** Returns timeout
**
*******************************************************************************/
UINT32 CalConnectParamTimeout(tL2C_LCB *p_lcb)
{
UINT32 timeout = 6;
if (p_lcb != NULL){
//1.25 * conn_int *(1+ latency) *32
timeout = (40 * ( 1 + p_lcb->current_used_conn_latency) * p_lcb->current_used_conn_interval + 1000) / 1000;
if (timeout < 1){
timeout = 1;
}else if (timeout > 120){
timeout = 120;
}
}
return timeout;
}
/*******************************************************************************
**
** Function l2cble_credit_based_conn_req
**
** Description This function sends LE Credit Based Connection Request for
** LE connection oriented channels.
**
** Returns void
**
*******************************************************************************/
void l2cble_credit_based_conn_req (tL2C_CCB *p_ccb)
{
if (!p_ccb) {
return;
}
if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
{
L2CAP_TRACE_WARNING ("LE link doesn't exist");
return;
}
l2cu_send_peer_ble_credit_based_conn_req (p_ccb);
return;
}
/*******************************************************************************
**
** Function l2cble_credit_based_conn_res
**
** Description This function sends LE Credit Based Connection Response for
** LE connection oriented channels.
**
** Returns void
**
*******************************************************************************/
void l2cble_credit_based_conn_res (tL2C_CCB *p_ccb, UINT16 result)
{
if (!p_ccb) {
return;
}
if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
{
L2CAP_TRACE_WARNING ("LE link doesn't exist");
return;
}
l2cu_send_peer_ble_credit_based_conn_res (p_ccb, result);
return;
}
/*******************************************************************************
**
** Function l2cble_send_flow_control_credit
**
** Description This function sends flow control credits for
** LE connection oriented channels.
**
** Returns void
**
*******************************************************************************/
void l2cble_send_flow_control_credit(tL2C_CCB *p_ccb, UINT16 credit_value)
{
if (!p_ccb) {
return;
}
if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
{
L2CAP_TRACE_WARNING ("LE link doesn't exist");
return;
}
l2cu_send_peer_ble_flow_control_credit(p_ccb, credit_value);
return;
}
/*******************************************************************************
**
** Function l2cble_send_peer_disc_req
**
** Description This function sends disconnect request
** to the peer LE device
**
** Returns void
**
*******************************************************************************/
void l2cble_send_peer_disc_req(tL2C_CCB *p_ccb)
{
L2CAP_TRACE_DEBUG ("%s",__func__);
if (!p_ccb) {
return;
}
if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
{
L2CAP_TRACE_WARNING ("LE link doesn't exist");
return;
}
l2cu_send_peer_ble_credit_based_disconn_req(p_ccb);
return;
}
#if (SMP_INCLUDED == TRUE)
/*******************************************************************************
**
** Function l2cble_sec_comp
**
** Description This function is called when security procedure for an LE COC
** link is done
**
** Returns void
**
*******************************************************************************/
void l2cble_sec_comp(BD_ADDR p_bda, tBT_TRANSPORT transport, void *p_ref_data, UINT8 status)
{
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_bda, BT_TRANSPORT_LE);
tL2CAP_SEC_DATA *p_buf = NULL;
UINT8 sec_flag;
UINT8 sec_act;
if (!p_lcb)
{
L2CAP_TRACE_WARNING ("%s security complete for unknown device", __func__);
return;
}
sec_act = p_lcb->sec_act;
p_lcb->sec_act = 0;
if (!fixed_queue_is_empty(p_lcb->le_sec_pending_q))
{
p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q, FIXED_QUEUE_MAX_TIMEOUT);
if (!p_buf)
{
L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP",
__func__);
return;
}
if (status != BTM_SUCCESS)
{
(*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
}
else
{
if (sec_act == BTM_SEC_ENCRYPT_MITM)
{
BTM_GetSecurityFlagsByTransport(p_bda, &sec_flag, transport);
if (sec_flag & BTM_SEC_FLAG_LKEY_AUTHED) {
(*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
}
else
{
L2CAP_TRACE_DEBUG ("%s MITM Protection Not present", __func__);
(*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data,
BTM_FAILED_ON_SECURITY);
}
}
else
{
L2CAP_TRACE_DEBUG ("%s MITM Protection not required sec_act = %d",
__func__, p_lcb->sec_act);
(*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
}
}
}
else
{
L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP", __func__);
return;
}
osi_free(p_buf);
while (!fixed_queue_is_empty(p_lcb->le_sec_pending_q))
{
p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q, FIXED_QUEUE_MAX_TIMEOUT);
if (status != BTM_SUCCESS) {
(*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
} else {
l2ble_sec_access_req(p_bda, p_buf->psm, p_buf->is_originator,
p_buf->p_callback, p_buf->p_ref_data);
}
osi_free(p_buf);
}
}
/*******************************************************************************
**
** Function l2ble_sec_access_req
**
** Description This function is called by LE COC link to meet the
** security requirement for the link
**
** Returns TRUE - security procedures are started
** FALSE - failure
**
*******************************************************************************/
BOOLEAN l2ble_sec_access_req(BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_originator, tL2CAP_SEC_CBACK *p_callback, void *p_ref_data)
{
L2CAP_TRACE_DEBUG ("%s", __func__);
BOOLEAN status;
tL2C_LCB *p_lcb = NULL;
if (!p_callback)
{
L2CAP_TRACE_ERROR("%s No callback function", __func__);
return FALSE;
}
p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_LE);
if (!p_lcb)
{
L2CAP_TRACE_ERROR ("%s Security check for unknown device", __func__);
p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_UNKNOWN_ADDR);
return FALSE;
}
tL2CAP_SEC_DATA *p_buf = (tL2CAP_SEC_DATA*) osi_malloc((UINT16)sizeof(tL2CAP_SEC_DATA));
if (!p_buf)
{
p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_NO_RESOURCES);
return FALSE;
}
p_buf->psm = psm;
p_buf->is_originator = is_originator;
p_buf->p_callback = p_callback;
p_buf->p_ref_data = p_ref_data;
fixed_queue_enqueue(p_lcb->le_sec_pending_q, p_buf, FIXED_QUEUE_MAX_TIMEOUT);
status = btm_ble_start_sec_check(bd_addr, psm, is_originator, &l2cble_sec_comp, p_ref_data);
return status;
}
#endif /* #if (SMP_INCLUDED == TRUE) */
#endif /* (BLE_INCLUDED == TRUE) */
/*******************************************************************************
**
** Function L2CA_GetDisconnectReason
**
** Description This function returns the disconnect reason code.
**
** Returns disconnect reason
**
*******************************************************************************/
UINT16 L2CA_GetDisconnectReason (BD_ADDR remote_bda, tBT_TRANSPORT transport)
{
tL2C_LCB *p_lcb;
UINT16 reason = 0;
if ((p_lcb = l2cu_find_lcb_by_bd_addr (remote_bda, transport)) != NULL) {
reason = p_lcb->disc_reason;
}
L2CAP_TRACE_DEBUG ("L2CA_GetDisconnectReason=%d ", reason);
return reason;
}
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