blob: f33c35572987885361526285e85559db060ce317 [file] [log] [blame]
/******************************************************************************
*
* 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 "bt_target.h"
#include "bt_utils.h"
#include "l2cdefs.h"
#include "l2c_int.h"
#include "btu.h"
#include "btm_int.h"
#include "hcimsgs.h"
#include "device/include/controller.h"
#include "stack_config.h"
#if (BLE_INCLUDED == TRUE)
extern fixed_queue_t *btu_general_alarm_queue;
static void l2cble_start_conn_update (tL2C_LCB *p_lcb);
/*******************************************************************************
**
** 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);
/* 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);
}
p_lcb->min_interval = min_int;
p_lcb->max_interval = max_int;
p_lcb->latency = latency;
p_lcb->timeout = timeout;
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
l2cble_start_conn_update(p_lcb);
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)
{
if (stack_config_get_interface()->get_pts_conn_updates_disabled())
return false;
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 (enable)
p_lcb->conn_update_mask &= ~L2C_BLE_CONN_UPDATE_DISABLE;
else
p_lcb->conn_update_mask |= L2C_BLE_CONN_UPDATE_DISABLE;
l2cble_start_conn_update(p_lcb);
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 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;
}
void l2cble_use_preferred_conn_params(BD_ADDR bda) {
tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda);
/* 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) &&
((p_lcb->min_interval < p_dev_rec->conn_params.min_conn_int &&
p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ||
(p_lcb->min_interval > p_dev_rec->conn_params.max_conn_int) ||
(p_lcb->latency > p_dev_rec->conn_params.slave_latency) ||
(p_lcb->timeout > p_dev_rec->conn_params.supervision_tout)))
{
L2CAP_TRACE_DEBUG ("%s: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d", __func__,
p_lcb->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->min_interval = p_dev_rec->conn_params.min_conn_int;
p_lcb->max_interval = p_dev_rec->conn_params.max_conn_int;
p_lcb->timeout = p_dev_rec->conn_params.supervision_tout;
p_lcb->latency = p_dev_rec->conn_params.slave_latency;
btsnd_hcic_ble_upd_ll_conn_params (p_lcb->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,
0, 0);
}
}
/*******************************************************************************
**
** 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) ;
tL2C_CCB *p_ccb;
if (p_lcb != NULL && p_acl != NULL && p_lcb->link_state != LST_CONNECTED)
{
/* 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);
}
/* For all channels, send the event through their FSMs */
for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb)
{
if (p_ccb->chnl_state == CST_CLOSED)
l2c_csm_execute (p_ccb, L2CEVT_LP_CONNECT_CFM, NULL);
}
l2cble_use_preferred_conn_params(bda);
}
/*******************************************************************************
**
** 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)
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_ERROR ("l2cble_scanner_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))
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
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;
}
alarm_cancel(p_lcb->l2c_lcb_timer);
/* 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->min_interval = p_lcb->max_interval = conn_interval;
p_lcb->timeout = conn_timeout;
p_lcb->latency = conn_latency;
p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;
/* 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)
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
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))
{
btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
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->min_interval = p_lcb->max_interval = conn_interval;
p_lcb->timeout = conn_timeout;
p_lcb->latency = conn_latency;
p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;
/* 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: none
**
*******************************************************************************/
static void l2cble_start_conn_update (tL2C_LCB *p_lcb)
{
UINT16 min_conn_int, max_conn_int, slave_latency, supervision_tout;
tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE);
// TODO(armansito): The return value of this call wasn't being used but the
// logic of this function might be depending on its side effects. We should
// verify if this call is needed at all and remove it otherwise.
btm_find_or_alloc_dev(p_lcb->remote_bd_addr);
if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) return;
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->min_interval > BTM_BLE_CONN_INT_MIN)
{
/* use 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)
|| (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, 0, 0);
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
}
else
{
l2cu_send_peer_ble_par_req (p_lcb, min_conn_int, max_conn_int, slave_latency, supervision_tout);
}
p_lcb->conn_update_mask &= ~L2C_BLE_NOT_DEFAULT_PARAM;
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
}
}
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)
|| (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->min_interval,
p_lcb->max_interval, p_lcb->latency, p_lcb->timeout, 0, 0);
p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
}
else
{
l2cu_send_peer_ble_par_req (p_lcb, p_lcb->min_interval, p_lcb->max_interval,
p_lcb->latency, p_lcb->timeout);
}
p_lcb->conn_update_mask &= ~L2C_BLE_NEW_CONN_PARAM;
p_lcb->conn_update_mask |= L2C_BLE_NOT_DEFAULT_PARAM;
}
}
}
/*******************************************************************************
**
** 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)
{
tL2C_LCB *p_lcb;
L2CAP_TRACE_DEBUG("l2cble_process_conn_update_evt");
/* 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("l2cble_process_conn_update_evt: Invalid handle: %d", handle);
return;
}
p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING;
if (status != HCI_SUCCESS)
{
L2CAP_TRACE_WARNING("l2cble_process_conn_update_evt: Error status: %d", status);
}
l2cble_start_conn_update(p_lcb);
L2CAP_TRACE_DEBUG("l2cble_process_conn_update_evt: conn_update_mask=%d", p_lcb->conn_update_mask);
}
/*******************************************************************************
**
** 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;
tL2C_CONN_INFO con_info;
UINT16 lcid = 0, rcid = 0, mtu = 0, mps = 0, initial_credit = 0;
tL2C_CCB *p_ccb = NULL, *temp_p_ccb = NULL;
tL2C_RCB *p_rcb;
UINT16 credit;
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_LIMIT)
min_interval = BTM_BLE_CONN_INT_MIN_LIMIT;
// While this could result in connection parameters that fall
// outside fo the range requested, this will allow the connection
// to remain established.
// In other words, this is a workaround for certain peripherals.
if (max_interval < BTM_BLE_CONN_INT_MIN_LIMIT)
max_interval = BTM_BLE_CONN_INT_MIN_LIMIT;
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 >= max_interval && latency > (timeout * 10/(max_interval * 1.25) - 1)) ||*/
timeout < BTM_BLE_CONN_SUP_TOUT_MIN || timeout > BTM_BLE_CONN_SUP_TOUT_MAX ||
max_interval < min_interval)
{
l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_UNACCEPTABLE_PARAMS, id);
}
else
{
l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id);
p_lcb->min_interval = min_interval;
p_lcb->max_interval = max_interval;
p_lcb->latency = latency;
p_lcb->timeout = timeout;
p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
l2cble_start_conn_update(p_lcb);
}
}
else
l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
break;
case L2CAP_CMD_BLE_UPDATE_RSP:
p += 2;
break;
case L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ:
STREAM_TO_UINT16 (con_info.psm, p);
STREAM_TO_UINT16 (rcid, p);
STREAM_TO_UINT16 (mtu, p);
STREAM_TO_UINT16 (mps, p);
STREAM_TO_UINT16 (initial_credit, p);
L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ with "
"mtu = %d, "
"mps = %d, "
"initial credit = %d", mtu, mps, initial_credit);
if ((p_rcb = l2cu_find_ble_rcb_by_psm (con_info.psm)) == NULL)
{
L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for unknown PSM: 0x%04x", con_info.psm);
l2cu_reject_ble_connection (p_lcb, id, L2CAP_LE_NO_PSM);
break;
}
else
{
if (!p_rcb->api.pL2CA_ConnectInd_Cb)
{
L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for outgoing-only connection PSM: %d", con_info.psm);
l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_PSM);
break;
}
}
/* Allocate a ccb for this.*/
if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL)
{
L2CAP_TRACE_ERROR ("L2CAP - unable to allocate CCB");
l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES);
break;
}
/* validate the parameters */
if (mtu < L2CAP_LE_MIN_MTU || mps < L2CAP_LE_MIN_MPS || mps > L2CAP_LE_MAX_MPS)
{
L2CAP_TRACE_ERROR ("L2CAP don't like the params");
l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES);
break;
}
p_ccb->remote_id = id;
p_ccb->p_rcb = p_rcb;
p_ccb->remote_cid = rcid;
p_ccb->peer_conn_cfg.mtu = mtu;
p_ccb->peer_conn_cfg.mps = mps;
p_ccb->peer_conn_cfg.credits = initial_credit;
p_ccb->tx_mps = mps;
p_ccb->ble_sdu = NULL;
p_ccb->ble_sdu_length = 0;
p_ccb->is_first_seg = TRUE;
p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE;
l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_REQ, &con_info);
break;
case L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES:
L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES");
/* For all channels, see whose identifier matches this id */
for (temp_p_ccb = p_lcb->ccb_queue.p_first_ccb; temp_p_ccb; temp_p_ccb = temp_p_ccb->p_next_ccb)
{
if (temp_p_ccb->local_id == id)
{
p_ccb = temp_p_ccb;
break;
}
}
if (p_ccb)
{
L2CAP_TRACE_DEBUG ("I remember the connection req");
STREAM_TO_UINT16 (p_ccb->remote_cid, p);
STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mtu, p);
STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mps, p);
STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.credits, p);
STREAM_TO_UINT16 (con_info.l2cap_result, p);
con_info.remote_cid = p_ccb->remote_cid;
L2CAP_TRACE_DEBUG ("remote_cid = %d, "
"mtu = %d, "
"mps = %d, "
"initial_credit = %d, "
"con_info.l2cap_result = %d",
p_ccb->remote_cid, p_ccb->peer_conn_cfg.mtu, p_ccb->peer_conn_cfg.mps,
p_ccb->peer_conn_cfg.credits, con_info.l2cap_result);
/* validate the parameters */
if (p_ccb->peer_conn_cfg.mtu < L2CAP_LE_MIN_MTU ||
p_ccb->peer_conn_cfg.mps < L2CAP_LE_MIN_MPS ||
p_ccb->peer_conn_cfg.mps > L2CAP_LE_MAX_MPS)
{
L2CAP_TRACE_ERROR ("L2CAP don't like the params");
con_info.l2cap_result = L2CAP_LE_NO_RESOURCES;
l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
break;
}
p_ccb->tx_mps = p_ccb->peer_conn_cfg.mps;
p_ccb->ble_sdu = NULL;
p_ccb->ble_sdu_length = 0;
p_ccb->is_first_seg = TRUE;
p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE;
if (con_info.l2cap_result == L2CAP_LE_CONN_OK)
l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP, &con_info);
else
l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
}
else
{
L2CAP_TRACE_DEBUG ("I DO NOT remember the connection req");
con_info.l2cap_result = L2CAP_LE_INVALID_SOURCE_CID;
l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
}
break;
case L2CAP_CMD_BLE_FLOW_CTRL_CREDIT:
STREAM_TO_UINT16(lcid, p);
if((p_ccb = l2cu_find_ccb_by_remote_cid(p_lcb, lcid)) == NULL)
{
L2CAP_TRACE_DEBUG ("%s Credit received for unknown channel id %d", __func__, lcid);
break;
}
STREAM_TO_UINT16(credit ,p);
l2c_csm_execute(p_ccb, L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT, &credit);
L2CAP_TRACE_DEBUG ("%s Credit received", __func__);
break;
case L2CAP_CMD_DISC_REQ:
STREAM_TO_UINT16 (lcid, p);
STREAM_TO_UINT16 (rcid, p);
if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
{
if (p_ccb->remote_cid == rcid)
{
p_ccb->remote_id = id;
l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_REQ, NULL);
}
}
else
l2cu_send_peer_disc_rsp (p_lcb, id, lcid, rcid);
break;
case L2CAP_CMD_DISC_RSP:
STREAM_TO_UINT16 (rcid, p);
STREAM_TO_UINT16 (lcid, p);
if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
{
if ((p_ccb->remote_cid == rcid) && (p_ccb->local_id == id))
l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_RSP, NULL);
}
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);
break;
}
}
/*******************************************************************************
**
** 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)
{
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.privacy_mode ? BLE_ADDR_RANDOM : BLE_ADDR_PUBLIC;
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);
// If we have a current RPA, use that instead.
if (!bdaddr_is_empty((const bt_bdaddr_t *)p_dev_rec->ble.cur_rand_addr)) {
memcpy(peer_addr, p_dev_rec->ble.cur_rand_addr, BD_ADDR_LEN);
}
}
#endif
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;
}
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 */
0, /* UINT16 min_len */
0)) /* 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);
alarm_set_on_queue(p_lcb->l2c_lcb_timer,
L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS,
l2c_lcb_timer_timeout, p_lcb,
btu_general_alarm_queue);
btm_ble_set_conn_st (BLE_DIR_CONN);
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;
}
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, yy, 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;
/* 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 (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++)
{
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 */
for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++)
{
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 LCB %d Priority: %d XmitQuota: %d",
yy, 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) ) {
alarm_set_on_queue(p_lcb->l2c_lcb_timer,
L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS,
l2c_lcb_timer_timeout, p_lcb,
btu_general_alarm_queue);
}
}
}
}
#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)
{
p_lcb->min_interval = int_min;
p_lcb->max_interval = int_max;
p_lcb->latency = latency;
p_lcb->timeout = timeout;
/* if update is enabled, always accept connection parameter update */
if ((p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0)
{
btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, 0, 0);
}
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);
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;
/* ignore rx_data len for now */
}
/*******************************************************************************
**
** 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 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;
}
/*******************************************************************************
**
** 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);
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);
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);
status = btm_ble_start_sec_check(bd_addr, psm, is_originator, &l2cble_sec_comp, p_ref_data);
return status;
}
#endif /* (BLE_INCLUDED == TRUE) */