1 /******************************************************************************
3 * Copyright (C) 2009-2012 Broadcom Corporation
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 ******************************************************************************/
19 /******************************************************************************
21 * this file contains functions relating to BLE management.
23 ******************************************************************************/
26 #include "bt_target.h"
33 #include "device/include/controller.h"
34 #include "stack_config.h"
35 #include "btif_debug_l2c.h"
37 #if (BLE_INCLUDED == TRUE)
39 extern fixed_queue_t *btu_general_alarm_queue;
41 static void l2cble_start_conn_update (tL2C_LCB *p_lcb);
43 /*******************************************************************************
45 ** Function L2CA_CancelBleConnectReq
47 ** Description Cancel a pending connection attempt to a BLE device.
49 ** Parameters: BD Address of remote
51 ** Return value: TRUE if connection was cancelled
53 *******************************************************************************/
54 BOOLEAN L2CA_CancelBleConnectReq (BD_ADDR rem_bda)
58 /* There can be only one BLE connection request outstanding at a time */
59 if (btm_ble_get_conn_st() == BLE_CONN_IDLE)
61 L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - no connection pending");
65 if (memcmp (rem_bda, l2cb.ble_connecting_bda, BD_ADDR_LEN))
67 L2CAP_TRACE_WARNING ("L2CA_CancelBleConnectReq - different BDA Connecting: %08x%04x Cancel: %08x%04x",
68 (l2cb.ble_connecting_bda[0]<<24)+(l2cb.ble_connecting_bda[1]<<16)+(l2cb.ble_connecting_bda[2]<<8)+l2cb.ble_connecting_bda[3],
69 (l2cb.ble_connecting_bda[4]<<8)+l2cb.ble_connecting_bda[5],
70 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3], (rem_bda[4]<<8)+rem_bda[5]);
75 if (btsnd_hcic_ble_create_conn_cancel())
77 p_lcb = l2cu_find_lcb_by_bd_addr(rem_bda, BT_TRANSPORT_LE);
78 /* Do not remove lcb if an LE link is already up as a peripheral */
80 !(p_lcb->link_role == HCI_ROLE_SLAVE && BTM_ACL_IS_CONNECTED(rem_bda)))
82 p_lcb->disc_reason = L2CAP_CONN_CANCEL;
83 l2cu_release_lcb (p_lcb);
85 /* update state to be cancel, wait for connection cancel complete */
86 btm_ble_set_conn_st (BLE_CONN_CANCEL);
94 /*******************************************************************************
96 ** Function L2CA_UpdateBleConnParams
98 ** Description Update BLE connection parameters.
100 ** Parameters: BD Address of remote
102 ** Return value: TRUE if update started
104 *******************************************************************************/
105 BOOLEAN L2CA_UpdateBleConnParams (BD_ADDR rem_bda, UINT16 min_int, UINT16 max_int,
106 UINT16 latency, UINT16 timeout)
109 tACL_CONN *p_acl_cb = btm_bda_to_acl(rem_bda, BT_TRANSPORT_LE);
111 /* See if we have a link control block for the remote device */
112 p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE);
114 /* If we don't have one, create one and accept the connection. */
115 if (!p_lcb || !p_acl_cb)
117 L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - unknown BD_ADDR %08x%04x",
118 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
119 (rem_bda[4]<<8)+rem_bda[5]);
123 if (p_lcb->transport != BT_TRANSPORT_LE)
125 L2CAP_TRACE_WARNING ("L2CA_UpdateBleConnParams - BD_ADDR %08x%04x not LE",
126 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
127 (rem_bda[4]<<8)+rem_bda[5]);
131 p_lcb->min_interval = min_int;
132 p_lcb->max_interval = max_int;
133 p_lcb->latency = latency;
134 p_lcb->timeout = timeout;
135 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
137 l2cble_start_conn_update(p_lcb);
143 /*******************************************************************************
145 ** Function L2CA_EnableUpdateBleConnParams
147 ** Description Enable or disable update based on the request from the peer
149 ** Parameters: BD Address of remote
151 ** Return value: TRUE if update started
153 *******************************************************************************/
154 BOOLEAN L2CA_EnableUpdateBleConnParams (BD_ADDR rem_bda, BOOLEAN enable)
156 if (stack_config_get_interface()->get_pts_conn_updates_disabled())
161 /* See if we have a link control block for the remote device */
162 p_lcb = l2cu_find_lcb_by_bd_addr (rem_bda, BT_TRANSPORT_LE);
166 L2CAP_TRACE_WARNING ("L2CA_EnableUpdateBleConnParams - unknown BD_ADDR %08x%04x",
167 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
168 (rem_bda[4]<<8)+rem_bda[5]);
172 L2CAP_TRACE_API ("%s - BD_ADDR %08x%04x enable %d current upd state 0x%02x",__FUNCTION__,
173 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
174 (rem_bda[4]<<8)+rem_bda[5], enable, p_lcb->conn_update_mask);
176 if (p_lcb->transport != BT_TRANSPORT_LE)
178 L2CAP_TRACE_WARNING ("%s - BD_ADDR %08x%04x not LE (link role %d)", __FUNCTION__,
179 (rem_bda[0]<<24)+(rem_bda[1]<<16)+(rem_bda[2]<<8)+rem_bda[3],
180 (rem_bda[4]<<8)+rem_bda[5], p_lcb->link_role);
185 p_lcb->conn_update_mask &= ~L2C_BLE_CONN_UPDATE_DISABLE;
187 p_lcb->conn_update_mask |= L2C_BLE_CONN_UPDATE_DISABLE;
189 l2cble_start_conn_update(p_lcb);
195 /*******************************************************************************
197 ** Function L2CA_GetBleConnRole
199 ** Description This function returns the connection role.
201 ** Returns link role.
203 *******************************************************************************/
204 UINT8 L2CA_GetBleConnRole (BD_ADDR bd_addr)
206 UINT8 role = HCI_ROLE_UNKNOWN;
210 if ((p_lcb = l2cu_find_lcb_by_bd_addr (bd_addr, BT_TRANSPORT_LE)) != NULL)
211 role = p_lcb->link_role;
215 /*******************************************************************************
217 ** Function L2CA_GetDisconnectReason
219 ** Description This function returns the disconnect reason code.
221 ** Returns disconnect reason
223 *******************************************************************************/
224 UINT16 L2CA_GetDisconnectReason (BD_ADDR remote_bda, tBT_TRANSPORT transport)
229 if ((p_lcb = l2cu_find_lcb_by_bd_addr (remote_bda, transport)) != NULL)
230 reason = p_lcb->disc_reason;
232 L2CAP_TRACE_DEBUG ("L2CA_GetDisconnectReason=%d ",reason);
237 void l2cble_use_preferred_conn_params(BD_ADDR bda) {
238 tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
239 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda);
241 /* If there are any preferred connection parameters, set them now */
242 if ( (p_dev_rec->conn_params.min_conn_int >= BTM_BLE_CONN_INT_MIN ) &&
243 (p_dev_rec->conn_params.min_conn_int <= BTM_BLE_CONN_INT_MAX ) &&
244 (p_dev_rec->conn_params.max_conn_int >= BTM_BLE_CONN_INT_MIN ) &&
245 (p_dev_rec->conn_params.max_conn_int <= BTM_BLE_CONN_INT_MAX ) &&
246 (p_dev_rec->conn_params.slave_latency <= BTM_BLE_CONN_LATENCY_MAX ) &&
247 (p_dev_rec->conn_params.supervision_tout >= BTM_BLE_CONN_SUP_TOUT_MIN) &&
248 (p_dev_rec->conn_params.supervision_tout <= BTM_BLE_CONN_SUP_TOUT_MAX) &&
249 ((p_lcb->min_interval < p_dev_rec->conn_params.min_conn_int &&
250 p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ||
251 (p_lcb->min_interval > p_dev_rec->conn_params.max_conn_int) ||
252 (p_lcb->latency > p_dev_rec->conn_params.slave_latency) ||
253 (p_lcb->timeout > p_dev_rec->conn_params.supervision_tout)))
255 L2CAP_TRACE_DEBUG ("%s: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d supervision_tout=%d", __func__,
256 p_lcb->handle, p_dev_rec->conn_params.min_conn_int, p_dev_rec->conn_params.max_conn_int,
257 p_dev_rec->conn_params.slave_latency, p_dev_rec->conn_params.supervision_tout);
259 p_lcb->min_interval = p_dev_rec->conn_params.min_conn_int;
260 p_lcb->max_interval = p_dev_rec->conn_params.max_conn_int;
261 p_lcb->timeout = p_dev_rec->conn_params.supervision_tout;
262 p_lcb->latency = p_dev_rec->conn_params.slave_latency;
264 btsnd_hcic_ble_upd_ll_conn_params (p_lcb->handle,
265 p_dev_rec->conn_params.min_conn_int,
266 p_dev_rec->conn_params.max_conn_int,
267 p_dev_rec->conn_params.slave_latency,
268 p_dev_rec->conn_params.supervision_tout,
273 /*******************************************************************************
275 ** Function l2cble_notify_le_connection
277 ** Description This function notifiy the l2cap connection to the app layer
281 *******************************************************************************/
282 void l2cble_notify_le_connection (BD_ADDR bda)
284 tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
285 tACL_CONN *p_acl = btm_bda_to_acl(bda, BT_TRANSPORT_LE) ;
288 if (p_lcb != NULL && p_acl != NULL && p_lcb->link_state != LST_CONNECTED)
290 /* update link status */
291 btm_establish_continue(p_acl);
292 /* update l2cap link status and send callback */
293 p_lcb->link_state = LST_CONNECTED;
294 l2cu_process_fixed_chnl_resp (p_lcb);
297 /* For all channels, send the event through their FSMs */
298 for (p_ccb = p_lcb->ccb_queue.p_first_ccb; p_ccb; p_ccb = p_ccb->p_next_ccb)
300 if (p_ccb->chnl_state == CST_CLOSED)
301 l2c_csm_execute (p_ccb, L2CEVT_LP_CONNECT_CFM, NULL);
304 l2cble_use_preferred_conn_params(bda);
307 /*******************************************************************************
309 ** Function l2cble_scanner_conn_comp
311 ** Description This function is called when an HCI Connection Complete
312 ** event is received while we are a scanner (so we are master).
316 *******************************************************************************/
317 void l2cble_scanner_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
318 UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
321 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (bda);
323 L2CAP_TRACE_DEBUG ("l2cble_scanner_conn_comp: HANDLE=%d addr_type=%d conn_interval=%d slave_latency=%d supervision_tout=%d",
324 handle, type, conn_interval, conn_latency, conn_timeout);
326 l2cb.is_ble_connecting = FALSE;
328 /* See if we have a link control block for the remote device */
329 p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
331 /* If we don't have one, create one. this is auto connection complete. */
334 p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE);
337 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
338 L2CAP_TRACE_ERROR ("l2cble_scanner_conn_comp - failed to allocate LCB");
343 if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
345 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
346 L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
351 else if (p_lcb->link_state != LST_CONNECTING)
353 L2CAP_TRACE_ERROR ("L2CAP got BLE scanner conn_comp in bad state: %d", p_lcb->link_state);
356 alarm_cancel(p_lcb->l2c_lcb_timer);
358 /* Save the handle */
359 p_lcb->handle = handle;
361 /* Connected OK. Change state to connected, we were scanning so we are master */
362 p_lcb->link_role = HCI_ROLE_MASTER;
363 p_lcb->transport = BT_TRANSPORT_LE;
365 /* update link parameter, set slave link as non-spec default upon link up */
366 p_lcb->min_interval = p_lcb->max_interval = conn_interval;
367 p_lcb->timeout = conn_timeout;
368 p_lcb->latency = conn_latency;
369 p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;
371 /* Tell BTM Acl management about the link */
372 btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE);
374 p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;
376 btm_ble_set_conn_st(BLE_CONN_IDLE);
378 #if BLE_PRIVACY_SPT == TRUE
379 btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, TRUE);
384 /*******************************************************************************
386 ** Function l2cble_advertiser_conn_comp
388 ** Description This function is called when an HCI Connection Complete
389 ** event is received while we are an advertiser (so we are slave).
393 *******************************************************************************/
394 void l2cble_advertiser_conn_comp (UINT16 handle, BD_ADDR bda, tBLE_ADDR_TYPE type,
395 UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
398 tBTM_SEC_DEV_REC *p_dev_rec;
400 UNUSED(conn_interval);
401 UNUSED(conn_latency);
402 UNUSED(conn_timeout);
404 /* See if we have a link control block for the remote device */
405 p_lcb = l2cu_find_lcb_by_bd_addr (bda, BT_TRANSPORT_LE);
407 /* If we don't have one, create one and accept the connection. */
410 p_lcb = l2cu_allocate_lcb (bda, FALSE, BT_TRANSPORT_LE);
413 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
414 L2CAP_TRACE_ERROR ("l2cble_advertiser_conn_comp - failed to allocate LCB");
419 if (!l2cu_initialize_fixed_ccb (p_lcb, L2CAP_ATT_CID, &l2cb.fixed_reg[L2CAP_ATT_CID - L2CAP_FIRST_FIXED_CHNL].fixed_chnl_opts))
421 btm_sec_disconnect (handle, HCI_ERR_NO_CONNECTION);
422 L2CAP_TRACE_WARNING ("l2cble_scanner_conn_comp - LCB but no CCB");
428 /* Save the handle */
429 p_lcb->handle = handle;
431 /* Connected OK. Change state to connected, we were advertising, so we are slave */
432 p_lcb->link_role = HCI_ROLE_SLAVE;
433 p_lcb->transport = BT_TRANSPORT_LE;
435 /* update link parameter, set slave link as non-spec default upon link up */
436 p_lcb->min_interval = p_lcb->max_interval = conn_interval;
437 p_lcb->timeout = conn_timeout;
438 p_lcb->latency = conn_latency;
439 p_lcb->conn_update_mask = L2C_BLE_NOT_DEFAULT_PARAM;
441 /* Tell BTM Acl management about the link */
442 p_dev_rec = btm_find_or_alloc_dev (bda);
444 btm_acl_created (bda, NULL, p_dev_rec->sec_bd_name, handle, p_lcb->link_role, BT_TRANSPORT_LE);
446 #if BLE_PRIVACY_SPT == TRUE
447 btm_ble_disable_resolving_list(BTM_BLE_RL_ADV, TRUE);
450 p_lcb->peer_chnl_mask[0] = L2CAP_FIXED_CHNL_ATT_BIT | L2CAP_FIXED_CHNL_BLE_SIG_BIT | L2CAP_FIXED_CHNL_SMP_BIT;
452 if (!HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(controller_get_interface()->get_features_ble()->as_array))
454 p_lcb->link_state = LST_CONNECTED;
455 l2cu_process_fixed_chnl_resp (p_lcb);
458 /* when adv and initiating are both active, cancel the direct connection */
459 if (l2cb.is_ble_connecting && memcmp(bda, l2cb.ble_connecting_bda, BD_ADDR_LEN) == 0)
461 L2CA_CancelBleConnectReq(bda);
465 /*******************************************************************************
467 ** Function l2cble_conn_comp
469 ** Description This function is called when an HCI Connection Complete
470 ** event is received.
474 *******************************************************************************/
475 void l2cble_conn_comp(UINT16 handle, UINT8 role, BD_ADDR bda, tBLE_ADDR_TYPE type,
476 UINT16 conn_interval, UINT16 conn_latency, UINT16 conn_timeout)
478 btm_ble_update_link_topology_mask(role, TRUE);
480 if (role == HCI_ROLE_MASTER)
482 l2cble_scanner_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
486 l2cble_advertiser_conn_comp(handle, bda, type, conn_interval, conn_latency, conn_timeout);
490 /*******************************************************************************
492 ** Function l2cble_start_conn_update
494 ** Description start BLE connection parameter update process based on status
496 ** Parameters: lcb : l2cap link control block
498 ** Return value: none
500 *******************************************************************************/
501 static void l2cble_start_conn_update (tL2C_LCB *p_lcb)
503 UINT16 min_conn_int, max_conn_int, slave_latency, supervision_tout;
504 tACL_CONN *p_acl_cb = btm_bda_to_acl(p_lcb->remote_bd_addr, BT_TRANSPORT_LE);
506 // TODO(armansito): The return value of this call wasn't being used but the
507 // logic of this function might be depending on its side effects. We should
508 // verify if this call is needed at all and remove it otherwise.
509 btm_find_or_alloc_dev(p_lcb->remote_bd_addr);
511 if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) return;
513 if (p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE)
515 /* application requests to disable parameters update.
516 If parameters are already updated, lets set them
517 up to what has been requested during connection establishement */
518 if (p_lcb->conn_update_mask & L2C_BLE_NOT_DEFAULT_PARAM &&
519 /* current connection interval is greater than default min */
520 p_lcb->min_interval > BTM_BLE_CONN_INT_MIN)
522 /* use 7.5 ms as fast connection parameter, 0 slave latency */
523 min_conn_int = max_conn_int = BTM_BLE_CONN_INT_MIN;
524 slave_latency = BTM_BLE_CONN_SLAVE_LATENCY_DEF;
525 supervision_tout = BTM_BLE_CONN_TIMEOUT_DEF;
527 /* if both side 4.1, or we are master device, send HCI command */
528 if (p_lcb->link_role == HCI_ROLE_MASTER
529 #if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
530 || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) &&
531 HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features))
535 btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, min_conn_int, max_conn_int,
536 slave_latency, supervision_tout, 0, 0);
537 p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
541 l2cu_send_peer_ble_par_req (p_lcb, min_conn_int, max_conn_int, slave_latency, supervision_tout);
543 p_lcb->conn_update_mask &= ~L2C_BLE_NOT_DEFAULT_PARAM;
544 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
549 /* application allows to do update, if we were delaying one do it now */
550 if (p_lcb->conn_update_mask & L2C_BLE_NEW_CONN_PARAM)
552 /* if both side 4.1, or we are master device, send HCI command */
553 if (p_lcb->link_role == HCI_ROLE_MASTER
554 #if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
555 || (HCI_LE_CONN_PARAM_REQ_SUPPORTED(controller_get_interface()->get_features_ble()->as_array) &&
556 HCI_LE_CONN_PARAM_REQ_SUPPORTED(p_acl_cb->peer_le_features))
560 btsnd_hcic_ble_upd_ll_conn_params(p_lcb->handle, p_lcb->min_interval,
561 p_lcb->max_interval, p_lcb->latency, p_lcb->timeout, 0, 0);
562 p_lcb->conn_update_mask |= L2C_BLE_UPDATE_PENDING;
566 l2cu_send_peer_ble_par_req (p_lcb, p_lcb->min_interval, p_lcb->max_interval,
567 p_lcb->latency, p_lcb->timeout);
569 p_lcb->conn_update_mask &= ~L2C_BLE_NEW_CONN_PARAM;
570 p_lcb->conn_update_mask |= L2C_BLE_NOT_DEFAULT_PARAM;
574 /* Record the BLE connection update request. */
575 if (p_lcb->conn_update_mask & L2C_BLE_UPDATE_PENDING) {
577 bdcpy(bd_addr.address, p_lcb->remote_bd_addr);
578 btif_debug_ble_connection_update_request(bd_addr, min_conn_int, max_conn_int, slave_latency,
583 /*******************************************************************************
585 ** Function l2cble_process_conn_update_evt
587 ** Description This function enables the connection update request from remote
588 ** after a successful connection update response is received.
592 *******************************************************************************/
593 void l2cble_process_conn_update_evt (UINT16 handle, UINT8 status,
594 UINT16 interval, UINT16 latency, UINT16 timeout)
596 L2CAP_TRACE_DEBUG("%s", __func__);
598 /* See if we have a link control block for the remote device */
599 tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle);
602 L2CAP_TRACE_WARNING("%s: Invalid handle: %d", __func__, handle);
606 p_lcb->conn_update_mask &= ~L2C_BLE_UPDATE_PENDING;
608 if (status != HCI_SUCCESS)
610 L2CAP_TRACE_WARNING("%s: Error status: %d", __func__, status);
613 l2cble_start_conn_update(p_lcb);
615 /* Record the BLE connection update response. */
617 bdcpy(bd_addr.address, p_lcb->remote_bd_addr);
618 btif_debug_ble_connection_update_response(bd_addr, status, interval,
621 L2CAP_TRACE_DEBUG("%s: conn_update_mask=%d", __func__, p_lcb->conn_update_mask);
624 /*******************************************************************************
626 ** Function l2cble_process_sig_cmd
628 ** Description This function is called when a signalling packet is received
629 ** on the BLE signalling CID
633 *******************************************************************************/
634 void l2cble_process_sig_cmd (tL2C_LCB *p_lcb, UINT8 *p, UINT16 pkt_len)
639 UINT16 min_interval, max_interval, latency, timeout;
640 tL2C_CONN_INFO con_info;
641 UINT16 lcid = 0, rcid = 0, mtu = 0, mps = 0, initial_credit = 0;
642 tL2C_CCB *p_ccb = NULL, *temp_p_ccb = NULL;
645 p_pkt_end = p + pkt_len;
647 STREAM_TO_UINT8 (cmd_code, p);
648 STREAM_TO_UINT8 (id, p);
649 STREAM_TO_UINT16 (cmd_len, p);
651 /* Check command length does not exceed packet length */
652 if ((p + cmd_len) > p_pkt_end)
654 L2CAP_TRACE_WARNING ("L2CAP - LE - format error, pkt_len: %d cmd_len: %d code: %d", pkt_len, cmd_len, cmd_code);
660 case L2CAP_CMD_REJECT:
664 case L2CAP_CMD_ECHO_REQ:
665 case L2CAP_CMD_ECHO_RSP:
666 case L2CAP_CMD_INFO_RSP:
667 case L2CAP_CMD_INFO_REQ:
668 l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
671 case L2CAP_CMD_BLE_UPDATE_REQ:
672 STREAM_TO_UINT16 (min_interval, p); /* 0x0006 - 0x0C80 */
673 STREAM_TO_UINT16 (max_interval, p); /* 0x0006 - 0x0C80 */
674 STREAM_TO_UINT16 (latency, p); /* 0x0000 - 0x03E8 */
675 STREAM_TO_UINT16 (timeout, p); /* 0x000A - 0x0C80 */
676 /* If we are a master, the slave wants to update the parameters */
677 if (p_lcb->link_role == HCI_ROLE_MASTER)
679 if (min_interval < BTM_BLE_CONN_INT_MIN_LIMIT)
680 min_interval = BTM_BLE_CONN_INT_MIN_LIMIT;
682 if (min_interval < BTM_BLE_CONN_INT_MIN || min_interval > BTM_BLE_CONN_INT_MAX ||
683 max_interval < BTM_BLE_CONN_INT_MIN || max_interval > BTM_BLE_CONN_INT_MAX ||
684 latency > BTM_BLE_CONN_LATENCY_MAX ||
685 /*(timeout >= max_interval && latency > (timeout * 10/(max_interval * 1.25) - 1)) ||*/
686 timeout < BTM_BLE_CONN_SUP_TOUT_MIN || timeout > BTM_BLE_CONN_SUP_TOUT_MAX ||
687 max_interval < min_interval)
689 l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_UNACCEPTABLE_PARAMS, id);
694 l2cu_send_peer_ble_par_rsp (p_lcb, L2CAP_CFG_OK, id);
696 p_lcb->min_interval = min_interval;
697 p_lcb->max_interval = max_interval;
698 p_lcb->latency = latency;
699 p_lcb->timeout = timeout;
700 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
702 l2cble_start_conn_update(p_lcb);
706 l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
709 case L2CAP_CMD_BLE_UPDATE_RSP:
713 case L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ:
714 STREAM_TO_UINT16 (con_info.psm, p);
715 STREAM_TO_UINT16 (rcid, p);
716 STREAM_TO_UINT16 (mtu, p);
717 STREAM_TO_UINT16 (mps, p);
718 STREAM_TO_UINT16 (initial_credit, p);
720 L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_REQ with "
723 "initial credit = %d", mtu, mps, initial_credit);
725 if ((p_rcb = l2cu_find_ble_rcb_by_psm (con_info.psm)) == NULL)
727 L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for unknown PSM: 0x%04x", con_info.psm);
728 l2cu_reject_ble_connection (p_lcb, id, L2CAP_LE_NO_PSM);
733 if (!p_rcb->api.pL2CA_ConnectInd_Cb)
735 L2CAP_TRACE_WARNING ("L2CAP - rcvd conn req for outgoing-only connection PSM: %d", con_info.psm);
736 l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_PSM);
741 /* Allocate a ccb for this.*/
742 if ((p_ccb = l2cu_allocate_ccb (p_lcb, 0)) == NULL)
744 L2CAP_TRACE_ERROR ("L2CAP - unable to allocate CCB");
745 l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES);
749 /* validate the parameters */
750 if (mtu < L2CAP_LE_MIN_MTU || mps < L2CAP_LE_MIN_MPS || mps > L2CAP_LE_MAX_MPS)
752 L2CAP_TRACE_ERROR ("L2CAP don't like the params");
753 l2cu_reject_ble_connection (p_lcb, id, L2CAP_CONN_NO_RESOURCES);
757 p_ccb->remote_id = id;
758 p_ccb->p_rcb = p_rcb;
759 p_ccb->remote_cid = rcid;
761 p_ccb->peer_conn_cfg.mtu = mtu;
762 p_ccb->peer_conn_cfg.mps = mps;
763 p_ccb->peer_conn_cfg.credits = initial_credit;
766 p_ccb->ble_sdu = NULL;
767 p_ccb->ble_sdu_length = 0;
768 p_ccb->is_first_seg = TRUE;
769 p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE;
771 l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_REQ, &con_info);
774 case L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES:
775 L2CAP_TRACE_DEBUG ("Recv L2CAP_CMD_BLE_CREDIT_BASED_CONN_RES");
776 /* For all channels, see whose identifier matches this id */
777 for (temp_p_ccb = p_lcb->ccb_queue.p_first_ccb; temp_p_ccb; temp_p_ccb = temp_p_ccb->p_next_ccb)
779 if (temp_p_ccb->local_id == id)
787 L2CAP_TRACE_DEBUG ("I remember the connection req");
788 STREAM_TO_UINT16 (p_ccb->remote_cid, p);
789 STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mtu, p);
790 STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.mps, p);
791 STREAM_TO_UINT16 (p_ccb->peer_conn_cfg.credits, p);
792 STREAM_TO_UINT16 (con_info.l2cap_result, p);
793 con_info.remote_cid = p_ccb->remote_cid;
795 L2CAP_TRACE_DEBUG ("remote_cid = %d, "
798 "initial_credit = %d, "
799 "con_info.l2cap_result = %d",
800 p_ccb->remote_cid, p_ccb->peer_conn_cfg.mtu, p_ccb->peer_conn_cfg.mps,
801 p_ccb->peer_conn_cfg.credits, con_info.l2cap_result);
803 /* validate the parameters */
804 if (p_ccb->peer_conn_cfg.mtu < L2CAP_LE_MIN_MTU ||
805 p_ccb->peer_conn_cfg.mps < L2CAP_LE_MIN_MPS ||
806 p_ccb->peer_conn_cfg.mps > L2CAP_LE_MAX_MPS)
808 L2CAP_TRACE_ERROR ("L2CAP don't like the params");
809 con_info.l2cap_result = L2CAP_LE_NO_RESOURCES;
810 l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
814 p_ccb->tx_mps = p_ccb->peer_conn_cfg.mps;
815 p_ccb->ble_sdu = NULL;
816 p_ccb->ble_sdu_length = 0;
817 p_ccb->is_first_seg = TRUE;
818 p_ccb->peer_cfg.fcr.mode = L2CAP_FCR_LE_COC_MODE;
820 if (con_info.l2cap_result == L2CAP_LE_CONN_OK)
821 l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP, &con_info);
823 l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
827 L2CAP_TRACE_DEBUG ("I DO NOT remember the connection req");
828 con_info.l2cap_result = L2CAP_LE_INVALID_SOURCE_CID;
829 l2c_csm_execute(p_ccb, L2CEVT_L2CAP_CONNECT_RSP_NEG, &con_info);
833 case L2CAP_CMD_BLE_FLOW_CTRL_CREDIT:
834 STREAM_TO_UINT16(lcid, p);
835 if((p_ccb = l2cu_find_ccb_by_remote_cid(p_lcb, lcid)) == NULL)
837 L2CAP_TRACE_DEBUG ("%s Credit received for unknown channel id %d", __func__, lcid);
841 STREAM_TO_UINT16(credit ,p);
842 l2c_csm_execute(p_ccb, L2CEVT_L2CAP_RECV_FLOW_CONTROL_CREDIT, &credit);
843 L2CAP_TRACE_DEBUG ("%s Credit received", __func__);
846 case L2CAP_CMD_DISC_REQ:
847 STREAM_TO_UINT16 (lcid, p);
848 STREAM_TO_UINT16 (rcid, p);
850 if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
852 if (p_ccb->remote_cid == rcid)
854 p_ccb->remote_id = id;
855 l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_REQ, NULL);
859 l2cu_send_peer_disc_rsp (p_lcb, id, lcid, rcid);
863 case L2CAP_CMD_DISC_RSP:
864 STREAM_TO_UINT16 (rcid, p);
865 STREAM_TO_UINT16 (lcid, p);
867 if ((p_ccb = l2cu_find_ccb_by_cid (p_lcb, lcid)) != NULL)
869 if ((p_ccb->remote_cid == rcid) && (p_ccb->local_id == id))
870 l2c_csm_execute (p_ccb, L2CEVT_L2CAP_DISCONNECT_RSP, NULL);
875 L2CAP_TRACE_WARNING ("L2CAP - LE - unknown cmd code: %d", cmd_code);
876 l2cu_send_peer_cmd_reject (p_lcb, L2CAP_CMD_REJ_NOT_UNDERSTOOD, id, 0, 0);
881 /*******************************************************************************
883 ** Function l2cble_init_direct_conn
885 ** Description This function is to initate a direct connection
887 ** Returns TRUE connection initiated, FALSE otherwise.
889 *******************************************************************************/
890 BOOLEAN l2cble_init_direct_conn (tL2C_LCB *p_lcb)
892 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_or_alloc_dev (p_lcb->remote_bd_addr);
893 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
897 UINT8 peer_addr_type = BLE_ADDR_PUBLIC;
898 UINT8 own_addr_type = BLE_ADDR_PUBLIC;
900 /* There can be only one BLE connection request outstanding at a time */
901 if (p_dev_rec == NULL)
903 L2CAP_TRACE_WARNING ("unknown device, can not initate connection");
907 scan_int = (p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int;
908 scan_win = (p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF) ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win;
910 peer_addr_type = p_lcb->ble_addr_type;
911 memcpy(peer_addr, p_lcb->remote_bd_addr, BD_ADDR_LEN);
913 #if ( (defined BLE_PRIVACY_SPT) && (BLE_PRIVACY_SPT == TRUE))
914 own_addr_type = btm_cb.ble_ctr_cb.privacy_mode ? BLE_ADDR_RANDOM : BLE_ADDR_PUBLIC;
915 if (p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT)
917 if (btm_cb.ble_ctr_cb.privacy_mode >= BTM_PRIVACY_1_2)
918 own_addr_type |= BLE_ADDR_TYPE_ID_BIT;
920 btm_ble_enable_resolving_list(BTM_BLE_RL_INIT);
921 btm_random_pseudo_to_identity_addr(peer_addr, &peer_addr_type);
923 btm_ble_disable_resolving_list(BTM_BLE_RL_INIT, TRUE);
925 // If we have a current RPA, use that instead.
926 if (!bdaddr_is_empty((const bt_bdaddr_t *)p_dev_rec->ble.cur_rand_addr)) {
927 memcpy(peer_addr, p_dev_rec->ble.cur_rand_addr, BD_ADDR_LEN);
932 if (!btm_ble_topology_check(BTM_BLE_STATE_INIT))
934 l2cu_release_lcb (p_lcb);
935 L2CAP_TRACE_ERROR("initate direct connection fail, topology limitation");
939 if (!btsnd_hcic_ble_create_ll_conn (scan_int,/* UINT16 scan_int */
940 scan_win, /* UINT16 scan_win */
941 FALSE, /* UINT8 white_list */
942 peer_addr_type, /* UINT8 addr_type_peer */
943 peer_addr, /* BD_ADDR bda_peer */
944 own_addr_type, /* UINT8 addr_type_own */
945 (UINT16) ((p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ?
946 p_dev_rec->conn_params.min_conn_int : BTM_BLE_CONN_INT_MIN_DEF), /* UINT16 conn_int_min */
947 (UINT16) ((p_dev_rec->conn_params.max_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ?
948 p_dev_rec->conn_params.max_conn_int : BTM_BLE_CONN_INT_MAX_DEF), /* UINT16 conn_int_max */
949 (UINT16) ((p_dev_rec->conn_params.slave_latency != BTM_BLE_CONN_PARAM_UNDEF) ?
950 p_dev_rec->conn_params.slave_latency : BTM_BLE_CONN_SLAVE_LATENCY_DEF), /* UINT16 conn_latency */
951 (UINT16) ((p_dev_rec->conn_params.supervision_tout != BTM_BLE_CONN_PARAM_UNDEF) ?
952 p_dev_rec->conn_params.supervision_tout : BTM_BLE_CONN_TIMEOUT_DEF), /* conn_timeout */
953 0, /* UINT16 min_len */
954 0)) /* UINT16 max_len */
956 l2cu_release_lcb (p_lcb);
957 L2CAP_TRACE_ERROR("initate direct connection fail, no resources");
962 p_lcb->link_state = LST_CONNECTING;
963 l2cb.is_ble_connecting = TRUE;
964 memcpy (l2cb.ble_connecting_bda, p_lcb->remote_bd_addr, BD_ADDR_LEN);
965 alarm_set_on_queue(p_lcb->l2c_lcb_timer,
966 L2CAP_BLE_LINK_CONNECT_TIMEOUT_MS,
967 l2c_lcb_timer_timeout, p_lcb,
968 btu_general_alarm_queue);
969 btm_ble_set_conn_st (BLE_DIR_CONN);
975 /*******************************************************************************
977 ** Function l2cble_create_conn
979 ** Description This function initiates an acl connection via HCI
981 ** Returns TRUE if successful, FALSE if connection not started.
983 *******************************************************************************/
984 BOOLEAN l2cble_create_conn (tL2C_LCB *p_lcb)
986 tBTM_BLE_CONN_ST conn_st = btm_ble_get_conn_st();
989 /* There can be only one BLE connection request outstanding at a time */
990 if (conn_st == BLE_CONN_IDLE)
992 rt = l2cble_init_direct_conn(p_lcb);
996 L2CAP_TRACE_WARNING ("L2CAP - LE - cannot start new connection at conn st: %d", conn_st);
998 btm_ble_enqueue_direct_conn_req(p_lcb);
1000 if (conn_st == BLE_BG_CONN)
1001 btm_ble_suspend_bg_conn();
1008 /*******************************************************************************
1010 ** Function l2c_link_processs_ble_num_bufs
1012 ** Description This function is called when a "controller buffer size"
1013 ** event is first received from the controller. It updates
1014 ** the L2CAP values.
1018 *******************************************************************************/
1019 void l2c_link_processs_ble_num_bufs (UINT16 num_lm_ble_bufs)
1021 if (num_lm_ble_bufs == 0)
1023 num_lm_ble_bufs = L2C_DEF_NUM_BLE_BUF_SHARED;
1024 l2cb.num_lm_acl_bufs -= L2C_DEF_NUM_BLE_BUF_SHARED;
1027 l2cb.num_lm_ble_bufs = l2cb.controller_le_xmit_window = num_lm_ble_bufs;
1030 /*******************************************************************************
1032 ** Function l2c_ble_link_adjust_allocation
1034 ** Description This function is called when a link is created or removed
1035 ** to calculate the amount of packets each link may send to
1036 ** the HCI without an ack coming back.
1038 ** Currently, this is a simple allocation, dividing the
1039 ** number of Controller Packets by the number of links. In
1040 ** the future, QOS configuration should be examined.
1044 *******************************************************************************/
1045 void l2c_ble_link_adjust_allocation (void)
1047 UINT16 qq, yy, qq_remainder;
1049 UINT16 hi_quota, low_quota;
1050 UINT16 num_lowpri_links = 0;
1051 UINT16 num_hipri_links = 0;
1052 UINT16 controller_xmit_quota = l2cb.num_lm_ble_bufs;
1053 UINT16 high_pri_link_quota = L2CAP_HIGH_PRI_MIN_XMIT_QUOTA_A;
1055 /* If no links active, reset buffer quotas and controller buffers */
1056 if (l2cb.num_ble_links_active == 0)
1058 l2cb.controller_le_xmit_window = l2cb.num_lm_ble_bufs;
1059 l2cb.ble_round_robin_quota = l2cb.ble_round_robin_unacked = 0;
1063 /* First, count the links */
1064 for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++)
1066 if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE)
1068 if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH)
1075 /* now adjust high priority link quota */
1076 low_quota = num_lowpri_links ? 1 : 0;
1077 while ( (num_hipri_links * high_pri_link_quota + low_quota) > controller_xmit_quota )
1078 high_pri_link_quota--;
1081 /* Work out the xmit quota and buffer quota high and low priorities */
1082 hi_quota = num_hipri_links * high_pri_link_quota;
1083 low_quota = (hi_quota < controller_xmit_quota) ? controller_xmit_quota - hi_quota : 1;
1085 /* Work out and save the HCI xmit quota for each low priority link */
1087 /* If each low priority link cannot have at least one buffer */
1088 if (num_lowpri_links > low_quota)
1090 l2cb.ble_round_robin_quota = low_quota;
1091 qq = qq_remainder = 0;
1093 /* If each low priority link can have at least one buffer */
1094 else if (num_lowpri_links > 0)
1096 l2cb.ble_round_robin_quota = 0;
1097 l2cb.ble_round_robin_unacked = 0;
1098 qq = low_quota / num_lowpri_links;
1099 qq_remainder = low_quota % num_lowpri_links;
1101 /* If no low priority link */
1104 l2cb.ble_round_robin_quota = 0;
1105 l2cb.ble_round_robin_unacked = 0;
1106 qq = qq_remainder = 0;
1108 L2CAP_TRACE_EVENT ("l2c_ble_link_adjust_allocation num_hipri: %u num_lowpri: %u low_quota: %u round_robin_quota: %u qq: %u",
1109 num_hipri_links, num_lowpri_links, low_quota,
1110 l2cb.ble_round_robin_quota, qq);
1112 /* Now, assign the quotas to each link */
1113 for (yy = 0, p_lcb = &l2cb.lcb_pool[0]; yy < MAX_L2CAP_LINKS; yy++, p_lcb++)
1115 if (p_lcb->in_use && p_lcb->transport == BT_TRANSPORT_LE)
1117 if (p_lcb->acl_priority == L2CAP_PRIORITY_HIGH)
1119 p_lcb->link_xmit_quota = high_pri_link_quota;
1123 /* Safety check in case we switched to round-robin with something outstanding */
1124 /* if sent_not_acked is added into round_robin_unacked then don't add it again */
1125 /* l2cap keeps updating sent_not_acked for exiting from round robin */
1126 if (( p_lcb->link_xmit_quota > 0 )&&( qq == 0 ))
1127 l2cb.ble_round_robin_unacked += p_lcb->sent_not_acked;
1129 p_lcb->link_xmit_quota = qq;
1130 if (qq_remainder > 0)
1132 p_lcb->link_xmit_quota++;
1137 L2CAP_TRACE_EVENT("l2c_ble_link_adjust_allocation LCB %d Priority: %d XmitQuota: %d",
1138 yy, p_lcb->acl_priority, p_lcb->link_xmit_quota);
1140 L2CAP_TRACE_EVENT(" SentNotAcked: %d RRUnacked: %d",
1141 p_lcb->sent_not_acked, l2cb.round_robin_unacked);
1143 /* There is a special case where we have readjusted the link quotas and */
1144 /* this link may have sent anything but some other link sent packets so */
1145 /* so we may need a timer to kick off this link's transmissions. */
1146 if ( (p_lcb->link_state == LST_CONNECTED)
1147 && (!list_is_empty(p_lcb->link_xmit_data_q))
1148 && (p_lcb->sent_not_acked < p_lcb->link_xmit_quota) ) {
1149 alarm_set_on_queue(p_lcb->l2c_lcb_timer,
1150 L2CAP_LINK_FLOW_CONTROL_TIMEOUT_MS,
1151 l2c_lcb_timer_timeout, p_lcb,
1152 btu_general_alarm_queue);
1158 #if (defined BLE_LLT_INCLUDED) && (BLE_LLT_INCLUDED == TRUE)
1159 /*******************************************************************************
1161 ** Function l2cble_process_rc_param_request_evt
1163 ** Description process LE Remote Connection Parameter Request Event.
1167 *******************************************************************************/
1168 void l2cble_process_rc_param_request_evt(UINT16 handle, UINT16 int_min, UINT16 int_max,
1169 UINT16 latency, UINT16 timeout)
1171 tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle (handle);
1175 p_lcb->min_interval = int_min;
1176 p_lcb->max_interval = int_max;
1177 p_lcb->latency = latency;
1178 p_lcb->timeout = timeout;
1180 /* if update is enabled, always accept connection parameter update */
1181 if ((p_lcb->conn_update_mask & L2C_BLE_CONN_UPDATE_DISABLE) == 0)
1183 btsnd_hcic_ble_rc_param_req_reply(handle, int_min, int_max, latency, timeout, 0, 0);
1187 L2CAP_TRACE_EVENT ("L2CAP - LE - update currently disabled");
1188 p_lcb->conn_update_mask |= L2C_BLE_NEW_CONN_PARAM;
1189 btsnd_hcic_ble_rc_param_req_neg_reply (handle,HCI_ERR_UNACCEPT_CONN_INTERVAL);
1195 L2CAP_TRACE_WARNING("No link to update connection parameter")
1200 /*******************************************************************************
1202 ** Function l2cble_update_data_length
1204 ** Description This function update link tx data length if applicable
1208 *******************************************************************************/
1209 void l2cble_update_data_length(tL2C_LCB *p_lcb)
1214 L2CAP_TRACE_DEBUG("%s", __FUNCTION__);
1216 /* See if we have a link control block for the connection */
1220 for (i = 0; i < L2CAP_NUM_FIXED_CHNLS; i++)
1222 if (i + L2CAP_FIRST_FIXED_CHNL != L2CAP_BLE_SIGNALLING_CID)
1224 if ((p_lcb->p_fixed_ccbs[i] != NULL) &&
1225 (tx_mtu < (p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD)))
1226 tx_mtu = p_lcb->p_fixed_ccbs[i]->tx_data_len + L2CAP_PKT_OVERHEAD;
1230 if (tx_mtu > BTM_BLE_DATA_SIZE_MAX)
1231 tx_mtu = BTM_BLE_DATA_SIZE_MAX;
1233 /* update TX data length if changed */
1234 if (p_lcb->tx_data_len != tx_mtu)
1235 BTM_SetBleDataLength(p_lcb->remote_bd_addr, tx_mtu);
1239 /*******************************************************************************
1241 ** Function l2cble_process_data_length_change_evt
1243 ** Description This function process the data length change event
1247 *******************************************************************************/
1248 void l2cble_process_data_length_change_event(UINT16 handle, UINT16 tx_data_len, UINT16 rx_data_len)
1250 tL2C_LCB *p_lcb = l2cu_find_lcb_by_handle(handle);
1252 L2CAP_TRACE_DEBUG("%s TX data len = %d", __FUNCTION__, tx_data_len);
1256 if (tx_data_len > 0)
1257 p_lcb->tx_data_len = tx_data_len;
1259 /* ignore rx_data len for now */
1262 /*******************************************************************************
1264 ** Function l2cble_set_fixed_channel_tx_data_length
1266 ** Description This function update max fixed channel tx data length if applicable
1270 *******************************************************************************/
1271 void l2cble_set_fixed_channel_tx_data_length(BD_ADDR remote_bda, UINT16 fix_cid, UINT16 tx_mtu)
1273 tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(remote_bda, BT_TRANSPORT_LE);
1274 UINT16 cid = fix_cid - L2CAP_FIRST_FIXED_CHNL;
1276 L2CAP_TRACE_DEBUG("%s TX MTU = %d", __FUNCTION__, tx_mtu);
1278 if (!controller_get_interface()->supports_ble_packet_extension())
1280 L2CAP_TRACE_WARNING("%s, request not supported", __FUNCTION__);
1284 /* See if we have a link control block for the connection */
1288 if (p_lcb->p_fixed_ccbs[cid] != NULL)
1290 if (tx_mtu > BTM_BLE_DATA_SIZE_MAX)
1291 tx_mtu = BTM_BLE_DATA_SIZE_MAX;
1293 p_lcb->p_fixed_ccbs[cid]->tx_data_len = tx_mtu;
1296 l2cble_update_data_length(p_lcb);
1299 /*******************************************************************************
1301 ** Function l2cble_credit_based_conn_req
1303 ** Description This function sends LE Credit Based Connection Request for
1304 ** LE connection oriented channels.
1308 *******************************************************************************/
1309 void l2cble_credit_based_conn_req (tL2C_CCB *p_ccb)
1314 if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
1316 L2CAP_TRACE_WARNING ("LE link doesn't exist");
1320 l2cu_send_peer_ble_credit_based_conn_req (p_ccb);
1324 /*******************************************************************************
1326 ** Function l2cble_credit_based_conn_res
1328 ** Description This function sends LE Credit Based Connection Response for
1329 ** LE connection oriented channels.
1333 *******************************************************************************/
1334 void l2cble_credit_based_conn_res (tL2C_CCB *p_ccb, UINT16 result)
1339 if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
1341 L2CAP_TRACE_WARNING ("LE link doesn't exist");
1345 l2cu_send_peer_ble_credit_based_conn_res (p_ccb, result);
1349 /*******************************************************************************
1351 ** Function l2cble_send_flow_control_credit
1353 ** Description This function sends flow control credits for
1354 ** LE connection oriented channels.
1358 *******************************************************************************/
1359 void l2cble_send_flow_control_credit(tL2C_CCB *p_ccb, UINT16 credit_value)
1364 if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
1366 L2CAP_TRACE_WARNING ("LE link doesn't exist");
1370 l2cu_send_peer_ble_flow_control_credit(p_ccb, credit_value);
1375 /*******************************************************************************
1377 ** Function l2cble_send_peer_disc_req
1379 ** Description This function sends disconnect request
1380 ** to the peer LE device
1384 *******************************************************************************/
1385 void l2cble_send_peer_disc_req(tL2C_CCB *p_ccb)
1387 L2CAP_TRACE_DEBUG ("%s",__func__);
1391 if (p_ccb->p_lcb && p_ccb->p_lcb->transport != BT_TRANSPORT_LE)
1393 L2CAP_TRACE_WARNING ("LE link doesn't exist");
1397 l2cu_send_peer_ble_credit_based_disconn_req(p_ccb);
1401 /*******************************************************************************
1403 ** Function l2cble_sec_comp
1405 ** Description This function is called when security procedure for an LE COC
1410 *******************************************************************************/
1411 void l2cble_sec_comp(BD_ADDR p_bda, tBT_TRANSPORT transport, void *p_ref_data, UINT8 status)
1413 tL2C_LCB *p_lcb = l2cu_find_lcb_by_bd_addr(p_bda, BT_TRANSPORT_LE);
1414 tL2CAP_SEC_DATA *p_buf = NULL;
1420 L2CAP_TRACE_WARNING ("%s security complete for unknown device", __func__);
1424 sec_act = p_lcb->sec_act;
1427 if (!fixed_queue_is_empty(p_lcb->le_sec_pending_q))
1429 p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q);
1432 L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP",
1437 if (status != BTM_SUCCESS)
1439 (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
1443 if (sec_act == BTM_SEC_ENCRYPT_MITM)
1445 BTM_GetSecurityFlagsByTransport(p_bda, &sec_flag, transport);
1446 if (sec_flag & BTM_SEC_FLAG_LKEY_AUTHED)
1447 (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
1450 L2CAP_TRACE_DEBUG ("%s MITM Protection Not present", __func__);
1451 (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data,
1452 BTM_FAILED_ON_SECURITY);
1457 L2CAP_TRACE_DEBUG ("%s MITM Protection not required sec_act = %d",
1458 __func__, p_lcb->sec_act);
1460 (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
1466 L2CAP_TRACE_WARNING ("%s Security complete for request not initiated from L2CAP", __func__);
1471 while (!fixed_queue_is_empty(p_lcb->le_sec_pending_q))
1473 p_buf = (tL2CAP_SEC_DATA*) fixed_queue_dequeue(p_lcb->le_sec_pending_q);
1475 if (status != BTM_SUCCESS)
1476 (*(p_buf->p_callback))(p_bda, BT_TRANSPORT_LE, p_buf->p_ref_data, status);
1478 l2ble_sec_access_req(p_bda, p_buf->psm, p_buf->is_originator,
1479 p_buf->p_callback, p_buf->p_ref_data);
1485 /*******************************************************************************
1487 ** Function l2ble_sec_access_req
1489 ** Description This function is called by LE COC link to meet the
1490 ** security requirement for the link
1492 ** Returns TRUE - security procedures are started
1495 *******************************************************************************/
1496 BOOLEAN l2ble_sec_access_req(BD_ADDR bd_addr, UINT16 psm, BOOLEAN is_originator, tL2CAP_SEC_CBACK *p_callback, void *p_ref_data)
1498 L2CAP_TRACE_DEBUG ("%s", __func__);
1500 tL2C_LCB *p_lcb = NULL;
1504 L2CAP_TRACE_ERROR("%s No callback function", __func__);
1508 p_lcb = l2cu_find_lcb_by_bd_addr(bd_addr, BT_TRANSPORT_LE);
1512 L2CAP_TRACE_ERROR ("%s Security check for unknown device", __func__);
1513 p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_UNKNOWN_ADDR);
1517 tL2CAP_SEC_DATA *p_buf = (tL2CAP_SEC_DATA*) osi_malloc((UINT16)sizeof(tL2CAP_SEC_DATA));
1520 p_callback(bd_addr, BT_TRANSPORT_LE, p_ref_data, BTM_NO_RESOURCES);
1525 p_buf->is_originator = is_originator;
1526 p_buf->p_callback = p_callback;
1527 p_buf->p_ref_data = p_ref_data;
1528 fixed_queue_enqueue(p_lcb->le_sec_pending_q, p_buf);
1529 status = btm_ble_start_sec_check(bd_addr, psm, is_originator, &l2cble_sec_comp, p_ref_data);
1533 #endif /* (BLE_INCLUDED == TRUE) */