1 /******************************************************************************
2 *
3 * Copyright 2000-2012 Broadcom Corporation
4 *
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:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
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.
16 *
17 ******************************************************************************/
18
19 /*****************************************************************************
20 *
21 * Name: btm_acl.cc
22 *
23 * Description: This file contains functions that handle ACL connections.
24 * This includes operations such as hold and sniff modes,
25 * supported packet types.
26 *
27 * This module contains both internal and external (API)
28 * functions. External (API) functions are distinguishable
29 * by their names beginning with uppercase BTM.
30 *
31 *
32 *****************************************************************************/
33
34 #define LOG_TAG "btm_acl"
35
36 #include <stddef.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include "bt_common.h"
42 #include "bt_target.h"
43 #include "bt_types.h"
44 #include "bt_utils.h"
45 #include "btm_api.h"
46 #include "btm_int.h"
47 #include "btu.h"
48 #include "device/include/controller.h"
49 #include "device/include/interop.h"
50 #include "hcidefs.h"
51 #include "hcimsgs.h"
52 #include "l2c_int.h"
53 #include "osi/include/log.h"
54 #include "osi/include/osi.h"
55
56 static void btm_read_remote_features(uint16_t handle);
57 static void btm_read_remote_ext_features(uint16_t handle, uint8_t page_number);
58 static void btm_process_remote_ext_features(tACL_CONN* p_acl_cb,
59 uint8_t num_read_pages);
60
61 /* 3 seconds timeout waiting for responses */
62 #define BTM_DEV_REPLY_TIMEOUT_MS (3 * 1000)
63
64 /*******************************************************************************
65 *
66 * Function btm_acl_init
67 *
68 * Description This function is called at BTM startup to initialize
69 *
70 * Returns void
71 *
72 ******************************************************************************/
btm_acl_init(void)73 void btm_acl_init(void) {
74 BTM_TRACE_DEBUG("btm_acl_init");
75 /* Initialize nonzero defaults */
76 btm_cb.btm_def_link_super_tout = HCI_DEFAULT_INACT_TOUT;
77 btm_cb.acl_disc_reason = 0xff;
78 }
79
80 /*******************************************************************************
81 *
82 * Function btm_bda_to_acl
83 *
84 * Description This function returns the FIRST acl_db entry for the passed
85 * BDA.
86 *
87 * Parameters bda : BD address of the remote device
88 * transport : Physical transport used for ACL connection
89 * (BR/EDR or LE)
90 *
91 * Returns Returns pointer to the ACL DB for the requested BDA if found.
92 * NULL if not found.
93 *
94 ******************************************************************************/
btm_bda_to_acl(const RawAddress & bda,tBT_TRANSPORT transport)95 tACL_CONN* btm_bda_to_acl(const RawAddress& bda, tBT_TRANSPORT transport) {
96 tACL_CONN* p = &btm_cb.acl_db[0];
97 uint16_t xx;
98 for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
99 if ((p->in_use) && p->remote_addr == bda && p->transport == transport) {
100 BTM_TRACE_DEBUG("btm_bda_to_acl found");
101 return (p);
102 }
103 }
104
105 /* If here, no BD Addr found */
106 return ((tACL_CONN*)NULL);
107 }
108
109 /*******************************************************************************
110 *
111 * Function btm_handle_to_acl_index
112 *
113 * Description This function returns the FIRST acl_db entry for the passed
114 * hci_handle.
115 *
116 * Returns index to the acl_db or MAX_L2CAP_LINKS.
117 *
118 ******************************************************************************/
btm_handle_to_acl_index(uint16_t hci_handle)119 uint8_t btm_handle_to_acl_index(uint16_t hci_handle) {
120 tACL_CONN* p = &btm_cb.acl_db[0];
121 uint8_t xx;
122 BTM_TRACE_DEBUG("btm_handle_to_acl_index");
123 for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
124 if ((p->in_use) && (p->hci_handle == hci_handle)) {
125 break;
126 }
127 }
128
129 /* If here, no BD Addr found */
130 return (xx);
131 }
132
133 #if (BLE_PRIVACY_SPT == TRUE)
134 /*******************************************************************************
135 *
136 * Function btm_ble_get_acl_remote_addr
137 *
138 * Description This function reads the active remote address used for the
139 * connection.
140 *
141 * Returns success return true, otherwise false.
142 *
143 ******************************************************************************/
btm_ble_get_acl_remote_addr(tBTM_SEC_DEV_REC * p_dev_rec,RawAddress & conn_addr,tBLE_ADDR_TYPE * p_addr_type)144 bool btm_ble_get_acl_remote_addr(tBTM_SEC_DEV_REC* p_dev_rec,
145 RawAddress& conn_addr,
146 tBLE_ADDR_TYPE* p_addr_type) {
147 bool st = true;
148
149 if (p_dev_rec == NULL) {
150 BTM_TRACE_ERROR("%s can not find device with matching address", __func__);
151 return false;
152 }
153
154 switch (p_dev_rec->ble.active_addr_type) {
155 case BTM_BLE_ADDR_PSEUDO:
156 conn_addr = p_dev_rec->bd_addr;
157 *p_addr_type = p_dev_rec->ble.ble_addr_type;
158 break;
159
160 case BTM_BLE_ADDR_RRA:
161 conn_addr = p_dev_rec->ble.cur_rand_addr;
162 *p_addr_type = BLE_ADDR_RANDOM;
163 break;
164
165 case BTM_BLE_ADDR_STATIC:
166 conn_addr = p_dev_rec->ble.static_addr;
167 *p_addr_type = p_dev_rec->ble.static_addr_type;
168 break;
169
170 default:
171 BTM_TRACE_ERROR("Unknown active address: %d",
172 p_dev_rec->ble.active_addr_type);
173 st = false;
174 break;
175 }
176
177 return st;
178 }
179 #endif
180 /*******************************************************************************
181 *
182 * Function btm_acl_created
183 *
184 * Description This function is called by L2CAP when an ACL connection
185 * is created.
186 *
187 * Returns void
188 *
189 ******************************************************************************/
btm_acl_created(const RawAddress & bda,DEV_CLASS dc,BD_NAME bdn,uint16_t hci_handle,uint8_t link_role,tBT_TRANSPORT transport)190 void btm_acl_created(const RawAddress& bda, DEV_CLASS dc, BD_NAME bdn,
191 uint16_t hci_handle, uint8_t link_role,
192 tBT_TRANSPORT transport) {
193 tBTM_SEC_DEV_REC* p_dev_rec = NULL;
194 tACL_CONN* p;
195 uint8_t xx;
196
197 BTM_TRACE_DEBUG("%s: peer %s hci_handle=%d link_role=%d transport=%d",
198 __func__, bda.ToString().c_str(), hci_handle, link_role,
199 transport);
200 /* Ensure we don't have duplicates */
201 p = btm_bda_to_acl(bda, transport);
202 if (p != (tACL_CONN*)NULL) {
203 p->hci_handle = hci_handle;
204 p->link_role = link_role;
205 p->transport = transport;
206 VLOG(1) << "Duplicate btm_acl_created: RemBdAddr: " << bda;
207 BTM_SetLinkPolicy(p->remote_addr, &btm_cb.btm_def_link_policy);
208 return;
209 }
210
211 /* Allocate acl_db entry */
212 for (xx = 0, p = &btm_cb.acl_db[0]; xx < MAX_L2CAP_LINKS; xx++, p++) {
213 if (!p->in_use) {
214 p->in_use = true;
215 p->hci_handle = hci_handle;
216 p->link_role = link_role;
217 p->link_up_issued = false;
218 p->remote_addr = bda;
219
220 p->transport = transport;
221 #if (BLE_PRIVACY_SPT == TRUE)
222 if (transport == BT_TRANSPORT_LE)
223 btm_ble_refresh_local_resolvable_private_addr(
224 bda, btm_cb.ble_ctr_cb.addr_mgnt_cb.private_addr);
225 #else
226 p->conn_addr_type = BLE_ADDR_PUBLIC;
227 p->conn_addr = *controller_get_interface()->get_address();
228
229 #endif
230 p->switch_role_failed_attempts = 0;
231 p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
232
233 btm_pm_sm_alloc(xx);
234
235 if (dc) memcpy(p->remote_dc, dc, DEV_CLASS_LEN);
236
237 if (bdn) memcpy(p->remote_name, bdn, BTM_MAX_REM_BD_NAME_LEN);
238
239 /* if BR/EDR do something more */
240 if (transport == BT_TRANSPORT_BR_EDR) {
241 btsnd_hcic_read_rmt_clk_offset(p->hci_handle);
242 btsnd_hcic_rmt_ver_req(p->hci_handle);
243 }
244 p_dev_rec = btm_find_dev_by_handle(hci_handle);
245
246 if (p_dev_rec) {
247 BTM_TRACE_DEBUG("%s: peer %s device_type=0x%x", __func__,
248 bda.ToString().c_str(), p_dev_rec->device_type);
249 }
250
251 if (p_dev_rec && !(transport == BT_TRANSPORT_LE)) {
252 /* If remote features already known, copy them and continue connection
253 * setup */
254 if ((p_dev_rec->num_read_pages) &&
255 (p_dev_rec->num_read_pages <= (HCI_EXT_FEATURES_PAGE_MAX + 1))) {
256 memcpy(p->peer_lmp_feature_pages, p_dev_rec->feature_pages,
257 (HCI_FEATURE_BYTES_PER_PAGE * p_dev_rec->num_read_pages));
258 p->num_read_pages = p_dev_rec->num_read_pages;
259
260 const uint8_t req_pend = (p_dev_rec->sm4 & BTM_SM4_REQ_PEND);
261
262 /* Store the Peer Security Capabilites (in SM4 and rmt_sec_caps) */
263 btm_sec_set_peer_sec_caps(p, p_dev_rec);
264
265 BTM_TRACE_API("%s: pend:%d", __func__, req_pend);
266 if (req_pend) {
267 /* Request for remaining Security Features (if any) */
268 l2cu_resubmit_pending_sec_req(&p_dev_rec->bd_addr);
269 }
270 btm_establish_continue(p);
271 return;
272 }
273 }
274
275 /* If here, features are not known yet */
276 if (p_dev_rec && transport == BT_TRANSPORT_LE) {
277 #if (BLE_PRIVACY_SPT == TRUE)
278 btm_ble_get_acl_remote_addr(p_dev_rec, p->active_remote_addr,
279 &p->active_remote_addr_type);
280 #endif
281
282 if (HCI_LE_SLAVE_INIT_FEAT_EXC_SUPPORTED(
283 controller_get_interface()->get_features_ble()->as_array) ||
284 link_role == HCI_ROLE_MASTER) {
285 btsnd_hcic_ble_read_remote_feat(p->hci_handle);
286 } else {
287 btm_establish_continue(p);
288 }
289 }
290
291 /* read page 1 - on rmt feature event for buffer reasons */
292 return;
293 }
294 }
295 }
296
btm_acl_update_conn_addr(uint16_t conn_handle,const RawAddress & address)297 void btm_acl_update_conn_addr(uint16_t conn_handle, const RawAddress& address) {
298 uint8_t idx = btm_handle_to_acl_index(conn_handle);
299 if (idx != MAX_L2CAP_LINKS) {
300 btm_cb.acl_db[idx].conn_addr = address;
301 }
302 }
303
304 /*******************************************************************************
305 *
306 * Function btm_acl_report_role_change
307 *
308 * Description This function is called when the local device is deemed
309 * to be down. It notifies L2CAP of the failure.
310 *
311 * Returns void
312 *
313 ******************************************************************************/
btm_acl_report_role_change(uint8_t hci_status,const RawAddress * bda)314 void btm_acl_report_role_change(uint8_t hci_status, const RawAddress* bda) {
315 tBTM_ROLE_SWITCH_CMPL ref_data;
316 BTM_TRACE_DEBUG("btm_acl_report_role_change");
317 if (btm_cb.devcb.p_switch_role_cb &&
318 (bda && btm_cb.devcb.switch_role_ref_data.remote_bd_addr == *bda)) {
319 memcpy(&ref_data, &btm_cb.devcb.switch_role_ref_data,
320 sizeof(tBTM_ROLE_SWITCH_CMPL));
321 ref_data.hci_status = hci_status;
322 (*btm_cb.devcb.p_switch_role_cb)(&ref_data);
323 memset(&btm_cb.devcb.switch_role_ref_data, 0,
324 sizeof(tBTM_ROLE_SWITCH_CMPL));
325 btm_cb.devcb.p_switch_role_cb = NULL;
326 }
327 }
328
329 /*******************************************************************************
330 *
331 * Function btm_acl_removed
332 *
333 * Description This function is called by L2CAP when an ACL connection
334 * is removed. Since only L2CAP creates ACL links, we use
335 * the L2CAP link index as our index into the control blocks.
336 *
337 * Returns void
338 *
339 ******************************************************************************/
btm_acl_removed(const RawAddress & bda,tBT_TRANSPORT transport)340 void btm_acl_removed(const RawAddress& bda, tBT_TRANSPORT transport) {
341 tACL_CONN* p;
342 tBTM_SEC_DEV_REC* p_dev_rec = NULL;
343 BTM_TRACE_DEBUG("btm_acl_removed");
344 p = btm_bda_to_acl(bda, transport);
345 if (p != (tACL_CONN*)NULL) {
346 p->in_use = false;
347
348 /* if the disconnected channel has a pending role switch, clear it now */
349 btm_acl_report_role_change(HCI_ERR_NO_CONNECTION, &bda);
350
351 /* Only notify if link up has had a chance to be issued */
352 if (p->link_up_issued) {
353 p->link_up_issued = false;
354
355 /* If anyone cares, indicate the database changed */
356 if (btm_cb.p_bl_changed_cb) {
357 tBTM_BL_EVENT_DATA evt_data;
358 evt_data.event = BTM_BL_DISCN_EVT;
359 evt_data.discn.p_bda = &bda;
360 evt_data.discn.handle = p->hci_handle;
361 evt_data.discn.transport = p->transport;
362 (*btm_cb.p_bl_changed_cb)(&evt_data);
363 }
364
365 btm_acl_update_busy_level(BTM_BLI_ACL_DOWN_EVT);
366 }
367
368 BTM_TRACE_DEBUG(
369 "acl hci_handle=%d transport=%d connectable_mode=0x%0x link_role=%d",
370 p->hci_handle, p->transport, btm_cb.ble_ctr_cb.inq_var.connectable_mode,
371 p->link_role);
372
373 p_dev_rec = btm_find_dev(bda);
374 if (p_dev_rec) {
375 BTM_TRACE_DEBUG("before update p_dev_rec->sec_flags=0x%x",
376 p_dev_rec->sec_flags);
377 if (p->transport == BT_TRANSPORT_LE) {
378 BTM_TRACE_DEBUG("LE link down");
379 p_dev_rec->sec_flags &= ~(BTM_SEC_LE_ENCRYPTED | BTM_SEC_ROLE_SWITCHED);
380 if ((p_dev_rec->sec_flags & BTM_SEC_LE_LINK_KEY_KNOWN) == 0) {
381 BTM_TRACE_DEBUG("Not Bonded");
382 p_dev_rec->sec_flags &=
383 ~(BTM_SEC_LE_LINK_KEY_AUTHED | BTM_SEC_LE_AUTHENTICATED);
384 } else {
385 BTM_TRACE_DEBUG("Bonded");
386 }
387 } else {
388 BTM_TRACE_DEBUG("Bletooth link down");
389 p_dev_rec->sec_flags &= ~(BTM_SEC_AUTHORIZED | BTM_SEC_AUTHENTICATED |
390 BTM_SEC_ENCRYPTED | BTM_SEC_ROLE_SWITCHED);
391 }
392 BTM_TRACE_DEBUG("after update p_dev_rec->sec_flags=0x%x",
393 p_dev_rec->sec_flags);
394 } else {
395 BTM_TRACE_ERROR("Device not found");
396 }
397
398 /* Clear the ACL connection data */
399 memset(p, 0, sizeof(tACL_CONN));
400 }
401 }
402
403 /*******************************************************************************
404 *
405 * Function btm_acl_device_down
406 *
407 * Description This function is called when the local device is deemed
408 * to be down. It notifies L2CAP of the failure.
409 *
410 * Returns void
411 *
412 ******************************************************************************/
btm_acl_device_down(void)413 void btm_acl_device_down(void) {
414 tACL_CONN* p = &btm_cb.acl_db[0];
415 uint16_t xx;
416 BTM_TRACE_DEBUG("btm_acl_device_down");
417 for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p++) {
418 if (p->in_use) {
419 BTM_TRACE_DEBUG("hci_handle=%d HCI_ERR_HW_FAILURE ", p->hci_handle);
420 l2c_link_hci_disc_comp(p->hci_handle, HCI_ERR_HW_FAILURE);
421 }
422 }
423 }
424
425 /*******************************************************************************
426 *
427 * Function btm_acl_update_busy_level
428 *
429 * Description This function is called to update the busy level of the
430 * system.
431 *
432 * Returns void
433 *
434 ******************************************************************************/
btm_acl_update_busy_level(tBTM_BLI_EVENT event)435 void btm_acl_update_busy_level(tBTM_BLI_EVENT event) {
436 bool old_inquiry_state = btm_cb.is_inquiry;
437 tBTM_BL_UPDATE_DATA evt;
438 evt.busy_level_flags = 0;
439 switch (event) {
440 case BTM_BLI_ACL_UP_EVT:
441 BTM_TRACE_DEBUG("BTM_BLI_ACL_UP_EVT");
442 break;
443 case BTM_BLI_ACL_DOWN_EVT:
444 BTM_TRACE_DEBUG("BTM_BLI_ACL_DOWN_EVT");
445 break;
446 case BTM_BLI_PAGE_EVT:
447 BTM_TRACE_DEBUG("BTM_BLI_PAGE_EVT");
448 btm_cb.is_paging = true;
449 evt.busy_level_flags = BTM_BL_PAGING_STARTED;
450 break;
451 case BTM_BLI_PAGE_DONE_EVT:
452 BTM_TRACE_DEBUG("BTM_BLI_PAGE_DONE_EVT");
453 btm_cb.is_paging = false;
454 evt.busy_level_flags = BTM_BL_PAGING_COMPLETE;
455 break;
456 case BTM_BLI_INQ_EVT:
457 BTM_TRACE_DEBUG("BTM_BLI_INQ_EVT");
458 btm_cb.is_inquiry = true;
459 evt.busy_level_flags = BTM_BL_INQUIRY_STARTED;
460 break;
461 case BTM_BLI_INQ_CANCEL_EVT:
462 BTM_TRACE_DEBUG("BTM_BLI_INQ_CANCEL_EVT");
463 btm_cb.is_inquiry = false;
464 evt.busy_level_flags = BTM_BL_INQUIRY_CANCELLED;
465 break;
466 case BTM_BLI_INQ_DONE_EVT:
467 BTM_TRACE_DEBUG("BTM_BLI_INQ_DONE_EVT");
468 btm_cb.is_inquiry = false;
469 evt.busy_level_flags = BTM_BL_INQUIRY_COMPLETE;
470 break;
471 }
472
473 uint8_t busy_level;
474 if (btm_cb.is_paging || btm_cb.is_inquiry)
475 busy_level = 10;
476 else
477 busy_level = BTM_GetNumAclLinks();
478
479 if ((busy_level != btm_cb.busy_level) ||
480 (old_inquiry_state != btm_cb.is_inquiry)) {
481 evt.event = BTM_BL_UPDATE_EVT;
482 evt.busy_level = busy_level;
483 btm_cb.busy_level = busy_level;
484 if (btm_cb.p_bl_changed_cb && (btm_cb.bl_evt_mask & BTM_BL_UPDATE_MASK)) {
485 tBTM_BL_EVENT_DATA btm_bl_event_data;
486 btm_bl_event_data.update = evt;
487 (*btm_cb.p_bl_changed_cb)(&btm_bl_event_data);
488 }
489 }
490 }
491
492 /*******************************************************************************
493 *
494 * Function BTM_GetRole
495 *
496 * Description This function is called to get the role of the local device
497 * for the ACL connection with the specified remote device
498 *
499 * Returns BTM_SUCCESS if connection exists.
500 * BTM_UNKNOWN_ADDR if no active link with bd addr specified
501 *
502 ******************************************************************************/
BTM_GetRole(const RawAddress & remote_bd_addr,uint8_t * p_role)503 tBTM_STATUS BTM_GetRole(const RawAddress& remote_bd_addr, uint8_t* p_role) {
504 tACL_CONN* p;
505 BTM_TRACE_DEBUG("BTM_GetRole");
506 p = btm_bda_to_acl(remote_bd_addr, BT_TRANSPORT_BR_EDR);
507 if (p == NULL) {
508 *p_role = BTM_ROLE_UNDEFINED;
509 return (BTM_UNKNOWN_ADDR);
510 }
511
512 /* Get the current role */
513 *p_role = p->link_role;
514 return (BTM_SUCCESS);
515 }
516
517 /*******************************************************************************
518 *
519 * Function BTM_SwitchRole
520 *
521 * Description This function is called to switch role between master and
522 * slave. If role is already set it will do nothing. If the
523 * command was initiated, the callback function is called upon
524 * completion.
525 *
526 * Returns BTM_SUCCESS if already in specified role.
527 * BTM_CMD_STARTED if command issued to controller.
528 * BTM_NO_RESOURCES if couldn't allocate memory to issue
529 * command
530 * BTM_UNKNOWN_ADDR if no active link with bd addr specified
531 * BTM_MODE_UNSUPPORTED if local device does not support role
532 * switching
533 * BTM_BUSY if the previous command is not completed
534 *
535 ******************************************************************************/
BTM_SwitchRole(const RawAddress & remote_bd_addr,uint8_t new_role,tBTM_CMPL_CB * p_cb)536 tBTM_STATUS BTM_SwitchRole(const RawAddress& remote_bd_addr, uint8_t new_role,
537 tBTM_CMPL_CB* p_cb) {
538 tACL_CONN* p;
539 tBTM_SEC_DEV_REC* p_dev_rec = NULL;
540 #if (BTM_SCO_INCLUDED == TRUE)
541 bool is_sco_active;
542 #endif
543 tBTM_STATUS status;
544 tBTM_PM_MODE pwr_mode;
545 tBTM_PM_PWR_MD settings;
546
547 LOG_INFO(LOG_TAG, "%s: peer %s new_role=0x%x p_cb=%p p_switch_role_cb=%p",
548 __func__, remote_bd_addr.ToString().c_str(), new_role, p_cb,
549 btm_cb.devcb.p_switch_role_cb);
550
551 /* Make sure the local device supports switching */
552 if (!controller_get_interface()->supports_master_slave_role_switch())
553 return (BTM_MODE_UNSUPPORTED);
554
555 if (btm_cb.devcb.p_switch_role_cb && p_cb) {
556 VLOG(2) << "Role switch on other device is in progress "
557 << btm_cb.devcb.switch_role_ref_data.remote_bd_addr;
558 return (BTM_BUSY);
559 }
560
561 p = btm_bda_to_acl(remote_bd_addr, BT_TRANSPORT_BR_EDR);
562 if (p == NULL) return (BTM_UNKNOWN_ADDR);
563
564 /* Finished if already in desired role */
565 if (p->link_role == new_role) return (BTM_SUCCESS);
566
567 if (interop_match_addr(INTEROP_DISABLE_ROLE_SWITCH, &remote_bd_addr))
568 return BTM_DEV_BLACKLISTED;
569
570 #if (BTM_SCO_INCLUDED == TRUE)
571 /* Check if there is any SCO Active on this BD Address */
572 is_sco_active = btm_is_sco_active_by_bdaddr(remote_bd_addr);
573
574 if (is_sco_active) return (BTM_NO_RESOURCES);
575 #endif
576
577 /* Ignore role switch request if the previous request was not completed */
578 if (p->switch_role_state != BTM_ACL_SWKEY_STATE_IDLE) {
579 BTM_TRACE_DEBUG("BTM_SwitchRole busy: %d", p->switch_role_state);
580 return (BTM_BUSY);
581 }
582
583 if (interop_match_addr(INTEROP_DYNAMIC_ROLE_SWITCH, &remote_bd_addr)) {
584 BTM_TRACE_DEBUG("%s, Device blacklisted under INTEROP_DYNAMIC_ROLE_SWITCH.",
585 __func__);
586 return BTM_DEV_BLACKLISTED;
587 }
588
589 status = BTM_ReadPowerMode(p->remote_addr, &pwr_mode);
590 if (status != BTM_SUCCESS) return (status);
591
592 /* Wake up the link if in sniff or park before attempting switch */
593 if (pwr_mode == BTM_PM_MD_PARK || pwr_mode == BTM_PM_MD_SNIFF) {
594 memset((void*)&settings, 0, sizeof(settings));
595 settings.mode = BTM_PM_MD_ACTIVE;
596 status = BTM_SetPowerMode(BTM_PM_SET_ONLY_ID, p->remote_addr, &settings);
597 if (status != BTM_CMD_STARTED) return (BTM_WRONG_MODE);
598
599 p->switch_role_state = BTM_ACL_SWKEY_STATE_MODE_CHANGE;
600 }
601 /* some devices do not support switch while encryption is on */
602 else {
603 p_dev_rec = btm_find_dev(remote_bd_addr);
604 if ((p_dev_rec != NULL) &&
605 ((p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) != 0) &&
606 !BTM_EPR_AVAILABLE(p)) {
607 /* bypass turning off encryption if change link key is already doing it */
608 if (p->encrypt_state != BTM_ACL_ENCRYPT_STATE_ENCRYPT_OFF) {
609 btsnd_hcic_set_conn_encrypt(p->hci_handle, false);
610 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_ENCRYPT_OFF;
611 }
612
613 p->switch_role_state = BTM_ACL_SWKEY_STATE_ENCRYPTION_OFF;
614 } else {
615 btsnd_hcic_switch_role(remote_bd_addr, new_role);
616 p->switch_role_state = BTM_ACL_SWKEY_STATE_IN_PROGRESS;
617
618 #if (BTM_DISC_DURING_RS == TRUE)
619 if (p_dev_rec) p_dev_rec->rs_disc_pending = BTM_SEC_RS_PENDING;
620 #endif
621 }
622 }
623
624 /* Initialize return structure in case request fails */
625 if (p_cb) {
626 btm_cb.devcb.switch_role_ref_data.remote_bd_addr = remote_bd_addr;
627 btm_cb.devcb.switch_role_ref_data.role = new_role;
628 /* initialized to an error code */
629 btm_cb.devcb.switch_role_ref_data.hci_status = HCI_ERR_UNSUPPORTED_VALUE;
630 btm_cb.devcb.p_switch_role_cb = p_cb;
631 }
632 return (BTM_CMD_STARTED);
633 }
634
635 /*******************************************************************************
636 *
637 * Function btm_acl_encrypt_change
638 *
639 * Description This function is when encryption of the connection is
640 * completed by the LM. Checks to see if a role switch or
641 * change of link key was active and initiates or continues
642 * process if needed.
643 *
644 * Returns void
645 *
646 ******************************************************************************/
btm_acl_encrypt_change(uint16_t handle,uint8_t status,uint8_t encr_enable)647 void btm_acl_encrypt_change(uint16_t handle, uint8_t status,
648 uint8_t encr_enable) {
649 tACL_CONN* p;
650 uint8_t xx;
651 tBTM_SEC_DEV_REC* p_dev_rec;
652
653 BTM_TRACE_DEBUG("btm_acl_encrypt_change handle=%d status=%d encr_enabl=%d",
654 handle, status, encr_enable);
655 xx = btm_handle_to_acl_index(handle);
656 /* don't assume that we can never get a bad hci_handle */
657 if (xx < MAX_L2CAP_LINKS)
658 p = &btm_cb.acl_db[xx];
659 else
660 return;
661
662 /* Process Role Switch if active */
663 if (p->switch_role_state == BTM_ACL_SWKEY_STATE_ENCRYPTION_OFF) {
664 /* if encryption turn off failed we still will try to switch role */
665 if (encr_enable) {
666 p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
667 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
668 } else {
669 p->switch_role_state = BTM_ACL_SWKEY_STATE_SWITCHING;
670 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_TEMP_FUNC;
671 }
672
673 btsnd_hcic_switch_role(p->remote_addr, (uint8_t)!p->link_role);
674 #if (BTM_DISC_DURING_RS == TRUE)
675 p_dev_rec = btm_find_dev(p->remote_addr);
676 if (p_dev_rec != NULL) p_dev_rec->rs_disc_pending = BTM_SEC_RS_PENDING;
677 #endif
678
679 }
680 /* Finished enabling Encryption after role switch */
681 else if (p->switch_role_state == BTM_ACL_SWKEY_STATE_ENCRYPTION_ON) {
682 p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
683 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
684 btm_acl_report_role_change(btm_cb.devcb.switch_role_ref_data.hci_status,
685 &p->remote_addr);
686
687 /* if role change event is registered, report it now */
688 if (btm_cb.p_bl_changed_cb && (btm_cb.bl_evt_mask & BTM_BL_ROLE_CHG_MASK)) {
689 tBTM_BL_ROLE_CHG_DATA evt;
690 evt.event = BTM_BL_ROLE_CHG_EVT;
691 evt.new_role = btm_cb.devcb.switch_role_ref_data.role;
692 evt.p_bda = &btm_cb.devcb.switch_role_ref_data.remote_bd_addr;
693 evt.hci_status = btm_cb.devcb.switch_role_ref_data.hci_status;
694 tBTM_BL_EVENT_DATA btm_bl_event_data;
695 btm_bl_event_data.role_chg = evt;
696 (*btm_cb.p_bl_changed_cb)(&btm_bl_event_data);
697
698 BTM_TRACE_DEBUG(
699 "%s: Role Switch Event: new_role 0x%02x, HCI Status 0x%02x, rs_st:%d",
700 __func__, evt.new_role, evt.hci_status, p->switch_role_state);
701 }
702
703 #if (BTM_DISC_DURING_RS == TRUE)
704 /* If a disconnect is pending, issue it now that role switch has completed
705 */
706 p_dev_rec = btm_find_dev(p->remote_addr);
707 if (p_dev_rec != NULL) {
708 if (p_dev_rec->rs_disc_pending == BTM_SEC_DISC_PENDING) {
709 BTM_TRACE_WARNING(
710 "btm_acl_encrypt_change -> Issuing delayed HCI_Disconnect!!!");
711 btsnd_hcic_disconnect(p_dev_rec->hci_handle, HCI_ERR_PEER_USER);
712 }
713 BTM_TRACE_ERROR(
714 "btm_acl_encrypt_change: tBTM_SEC_DEV:0x%x rs_disc_pending=%d",
715 PTR_TO_UINT(p_dev_rec), p_dev_rec->rs_disc_pending);
716 p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
717 }
718 #endif
719 }
720 }
721 /*******************************************************************************
722 *
723 * Function BTM_SetLinkPolicy
724 *
725 * Description Create and send HCI "Write Policy Set" command
726 *
727 * Returns status of the operation
728 *
729 ******************************************************************************/
BTM_SetLinkPolicy(const RawAddress & remote_bda,uint16_t * settings)730 tBTM_STATUS BTM_SetLinkPolicy(const RawAddress& remote_bda,
731 uint16_t* settings) {
732 tACL_CONN* p;
733 uint8_t* localFeatures = BTM_ReadLocalFeatures();
734 BTM_TRACE_DEBUG("%s", __func__);
735 /* BTM_TRACE_API ("%s: requested settings: 0x%04x", __func__, *settings ); */
736
737 /* First, check if hold mode is supported */
738 if (*settings != HCI_DISABLE_ALL_LM_MODES) {
739 if ((*settings & HCI_ENABLE_MASTER_SLAVE_SWITCH) &&
740 (!HCI_SWITCH_SUPPORTED(localFeatures))) {
741 *settings &= (~HCI_ENABLE_MASTER_SLAVE_SWITCH);
742 BTM_TRACE_API("BTM_SetLinkPolicy switch not supported (settings: 0x%04x)",
743 *settings);
744 }
745 if ((*settings & HCI_ENABLE_HOLD_MODE) &&
746 (!HCI_HOLD_MODE_SUPPORTED(localFeatures))) {
747 *settings &= (~HCI_ENABLE_HOLD_MODE);
748 BTM_TRACE_API("BTM_SetLinkPolicy hold not supported (settings: 0x%04x)",
749 *settings);
750 }
751 if ((*settings & HCI_ENABLE_SNIFF_MODE) &&
752 (!HCI_SNIFF_MODE_SUPPORTED(localFeatures))) {
753 *settings &= (~HCI_ENABLE_SNIFF_MODE);
754 BTM_TRACE_API("BTM_SetLinkPolicy sniff not supported (settings: 0x%04x)",
755 *settings);
756 }
757 if ((*settings & HCI_ENABLE_PARK_MODE) &&
758 (!HCI_PARK_MODE_SUPPORTED(localFeatures))) {
759 *settings &= (~HCI_ENABLE_PARK_MODE);
760 BTM_TRACE_API("BTM_SetLinkPolicy park not supported (settings: 0x%04x)",
761 *settings);
762 }
763 }
764
765 p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
766 if (p != NULL) {
767 btsnd_hcic_write_policy_set(p->hci_handle, *settings);
768 return BTM_CMD_STARTED;
769 }
770
771 /* If here, no BD Addr found */
772 return (BTM_UNKNOWN_ADDR);
773 }
774
775 /*******************************************************************************
776 *
777 * Function BTM_SetDefaultLinkPolicy
778 *
779 * Description Set the default value for HCI "Write Policy Set" command
780 * to use when an ACL link is created.
781 *
782 * Returns void
783 *
784 ******************************************************************************/
BTM_SetDefaultLinkPolicy(uint16_t settings)785 void BTM_SetDefaultLinkPolicy(uint16_t settings) {
786 uint8_t* localFeatures = BTM_ReadLocalFeatures();
787
788 BTM_TRACE_DEBUG("BTM_SetDefaultLinkPolicy setting:0x%04x", settings);
789
790 if ((settings & HCI_ENABLE_MASTER_SLAVE_SWITCH) &&
791 (!HCI_SWITCH_SUPPORTED(localFeatures))) {
792 settings &= ~HCI_ENABLE_MASTER_SLAVE_SWITCH;
793 BTM_TRACE_DEBUG(
794 "BTM_SetDefaultLinkPolicy switch not supported (settings: 0x%04x)",
795 settings);
796 }
797 if ((settings & HCI_ENABLE_HOLD_MODE) &&
798 (!HCI_HOLD_MODE_SUPPORTED(localFeatures))) {
799 settings &= ~HCI_ENABLE_HOLD_MODE;
800 BTM_TRACE_DEBUG(
801 "BTM_SetDefaultLinkPolicy hold not supported (settings: 0x%04x)",
802 settings);
803 }
804 if ((settings & HCI_ENABLE_SNIFF_MODE) &&
805 (!HCI_SNIFF_MODE_SUPPORTED(localFeatures))) {
806 settings &= ~HCI_ENABLE_SNIFF_MODE;
807 BTM_TRACE_DEBUG(
808 "BTM_SetDefaultLinkPolicy sniff not supported (settings: 0x%04x)",
809 settings);
810 }
811 if ((settings & HCI_ENABLE_PARK_MODE) &&
812 (!HCI_PARK_MODE_SUPPORTED(localFeatures))) {
813 settings &= ~HCI_ENABLE_PARK_MODE;
814 BTM_TRACE_DEBUG(
815 "BTM_SetDefaultLinkPolicy park not supported (settings: 0x%04x)",
816 settings);
817 }
818 BTM_TRACE_DEBUG("Set DefaultLinkPolicy:0x%04x", settings);
819
820 btm_cb.btm_def_link_policy = settings;
821
822 /* Set the default Link Policy of the controller */
823 btsnd_hcic_write_def_policy_set(settings);
824 }
825
btm_use_preferred_conn_params(const RawAddress & bda)826 void btm_use_preferred_conn_params(const RawAddress& bda) {
827 tL2C_LCB* p_lcb = l2cu_find_lcb_by_bd_addr(bda, BT_TRANSPORT_LE);
828 tBTM_SEC_DEV_REC* p_dev_rec = btm_find_or_alloc_dev(bda);
829
830 /* If there are any preferred connection parameters, set them now */
831 if ((p_dev_rec->conn_params.min_conn_int >= BTM_BLE_CONN_INT_MIN) &&
832 (p_dev_rec->conn_params.min_conn_int <= BTM_BLE_CONN_INT_MAX) &&
833 (p_dev_rec->conn_params.max_conn_int >= BTM_BLE_CONN_INT_MIN) &&
834 (p_dev_rec->conn_params.max_conn_int <= BTM_BLE_CONN_INT_MAX) &&
835 (p_dev_rec->conn_params.slave_latency <= BTM_BLE_CONN_LATENCY_MAX) &&
836 (p_dev_rec->conn_params.supervision_tout >= BTM_BLE_CONN_SUP_TOUT_MIN) &&
837 (p_dev_rec->conn_params.supervision_tout <= BTM_BLE_CONN_SUP_TOUT_MAX) &&
838 ((p_lcb->min_interval < p_dev_rec->conn_params.min_conn_int &&
839 p_dev_rec->conn_params.min_conn_int != BTM_BLE_CONN_PARAM_UNDEF) ||
840 (p_lcb->min_interval > p_dev_rec->conn_params.max_conn_int) ||
841 (p_lcb->latency > p_dev_rec->conn_params.slave_latency) ||
842 (p_lcb->timeout > p_dev_rec->conn_params.supervision_tout))) {
843 BTM_TRACE_DEBUG(
844 "%s: HANDLE=%d min_conn_int=%d max_conn_int=%d slave_latency=%d "
845 "supervision_tout=%d",
846 __func__, p_lcb->handle, p_dev_rec->conn_params.min_conn_int,
847 p_dev_rec->conn_params.max_conn_int,
848 p_dev_rec->conn_params.slave_latency,
849 p_dev_rec->conn_params.supervision_tout);
850
851 p_lcb->min_interval = p_dev_rec->conn_params.min_conn_int;
852 p_lcb->max_interval = p_dev_rec->conn_params.max_conn_int;
853 p_lcb->timeout = p_dev_rec->conn_params.supervision_tout;
854 p_lcb->latency = p_dev_rec->conn_params.slave_latency;
855
856 btsnd_hcic_ble_upd_ll_conn_params(
857 p_lcb->handle, p_dev_rec->conn_params.min_conn_int,
858 p_dev_rec->conn_params.max_conn_int,
859 p_dev_rec->conn_params.slave_latency,
860 p_dev_rec->conn_params.supervision_tout, 0, 0);
861 }
862 }
863
864 /*******************************************************************************
865 *
866 * Function btm_read_remote_version_complete
867 *
868 * Description This function is called when the command complete message
869 * is received from the HCI for the remote version info.
870 *
871 * Returns void
872 *
873 ******************************************************************************/
btm_read_remote_version_complete(uint8_t * p)874 void btm_read_remote_version_complete(uint8_t* p) {
875 tACL_CONN* p_acl_cb = &btm_cb.acl_db[0];
876 uint8_t status;
877 uint16_t handle;
878 int xx;
879 BTM_TRACE_DEBUG("btm_read_remote_version_complete");
880
881 STREAM_TO_UINT8(status, p);
882 STREAM_TO_UINT16(handle, p);
883
884 /* Look up the connection by handle and copy features */
885 for (xx = 0; xx < MAX_L2CAP_LINKS; xx++, p_acl_cb++) {
886 if ((p_acl_cb->in_use) && (p_acl_cb->hci_handle == handle)) {
887 if (status == HCI_SUCCESS) {
888 STREAM_TO_UINT8(p_acl_cb->lmp_version, p);
889 STREAM_TO_UINT16(p_acl_cb->manufacturer, p);
890 STREAM_TO_UINT16(p_acl_cb->lmp_subversion, p);
891
892 if (p_acl_cb->transport == BT_TRANSPORT_BR_EDR) {
893 btm_read_remote_features(p_acl_cb->hci_handle);
894 }
895 }
896
897 if (p_acl_cb->transport == BT_TRANSPORT_LE) {
898 l2cble_notify_le_connection(p_acl_cb->remote_addr);
899 btm_use_preferred_conn_params(p_acl_cb->remote_addr);
900 }
901 break;
902 }
903 }
904 }
905
906 /*******************************************************************************
907 *
908 * Function btm_process_remote_ext_features
909 *
910 * Description Local function called to process all extended features pages
911 * read from a remote device.
912 *
913 * Returns void
914 *
915 ******************************************************************************/
btm_process_remote_ext_features(tACL_CONN * p_acl_cb,uint8_t num_read_pages)916 void btm_process_remote_ext_features(tACL_CONN* p_acl_cb,
917 uint8_t num_read_pages) {
918 uint16_t handle = p_acl_cb->hci_handle;
919 tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev_by_handle(handle);
920 uint8_t page_idx;
921
922 BTM_TRACE_DEBUG("btm_process_remote_ext_features");
923
924 /* Make sure we have the record to save remote features information */
925 if (p_dev_rec == NULL) {
926 /* Get a new device; might be doing dedicated bonding */
927 p_dev_rec = btm_find_or_alloc_dev(p_acl_cb->remote_addr);
928 }
929
930 p_acl_cb->num_read_pages = num_read_pages;
931 p_dev_rec->num_read_pages = num_read_pages;
932
933 /* Move the pages to placeholder */
934 for (page_idx = 0; page_idx < num_read_pages; page_idx++) {
935 if (page_idx > HCI_EXT_FEATURES_PAGE_MAX) {
936 BTM_TRACE_ERROR("%s: page=%d unexpected", __func__, page_idx);
937 break;
938 }
939 memcpy(p_dev_rec->feature_pages[page_idx],
940 p_acl_cb->peer_lmp_feature_pages[page_idx],
941 HCI_FEATURE_BYTES_PER_PAGE);
942 }
943
944 if (!(p_dev_rec->sec_flags & BTM_SEC_NAME_KNOWN) ||
945 p_dev_rec->is_originator) {
946 BTM_TRACE_DEBUG("%s: Calling Next Security Procedure", __func__);
947 uint8_t status = btm_sec_execute_procedure(p_dev_rec);
948 if (status != BTM_CMD_STARTED) {
949 BTM_TRACE_ERROR("%s: Security procedure not started! status %d", __func__,
950 status);
951 btm_sec_dev_rec_cback_event(p_dev_rec, status, false);
952 }
953 }
954 const uint8_t req_pend = (p_dev_rec->sm4 & BTM_SM4_REQ_PEND);
955
956 /* Store the Peer Security Capabilites (in SM4 and rmt_sec_caps) */
957 btm_sec_set_peer_sec_caps(p_acl_cb, p_dev_rec);
958
959 BTM_TRACE_API("%s: pend:%d", __func__, req_pend);
960 if (req_pend) {
961 /* Request for remaining Security Features (if any) */
962 l2cu_resubmit_pending_sec_req(&p_dev_rec->bd_addr);
963 }
964 }
965
966 /*******************************************************************************
967 *
968 * Function btm_read_remote_features
969 *
970 * Description Local function called to send a read remote supported
971 * features/remote extended features page[0].
972 *
973 * Returns void
974 *
975 ******************************************************************************/
btm_read_remote_features(uint16_t handle)976 void btm_read_remote_features(uint16_t handle) {
977 uint8_t acl_idx;
978 tACL_CONN* p_acl_cb;
979
980 BTM_TRACE_DEBUG("btm_read_remote_features() handle: %d", handle);
981
982 acl_idx = btm_handle_to_acl_index(handle);
983 if (acl_idx >= MAX_L2CAP_LINKS) {
984 BTM_TRACE_ERROR("btm_read_remote_features handle=%d invalid", handle);
985 return;
986 }
987
988 p_acl_cb = &btm_cb.acl_db[acl_idx];
989 p_acl_cb->num_read_pages = 0;
990 memset(p_acl_cb->peer_lmp_feature_pages, 0,
991 sizeof(p_acl_cb->peer_lmp_feature_pages));
992
993 /* first send read remote supported features HCI command */
994 /* because we don't know whether the remote support extended feature command
995 */
996 btsnd_hcic_rmt_features_req(handle);
997 }
998
999 /*******************************************************************************
1000 *
1001 * Function btm_read_remote_ext_features
1002 *
1003 * Description Local function called to send a read remote extended
1004 * features
1005 *
1006 * Returns void
1007 *
1008 ******************************************************************************/
btm_read_remote_ext_features(uint16_t handle,uint8_t page_number)1009 void btm_read_remote_ext_features(uint16_t handle, uint8_t page_number) {
1010 BTM_TRACE_DEBUG("btm_read_remote_ext_features() handle: %d page: %d", handle,
1011 page_number);
1012
1013 btsnd_hcic_rmt_ext_features(handle, page_number);
1014 }
1015
1016 /*******************************************************************************
1017 *
1018 * Function btm_read_remote_features_complete
1019 *
1020 * Description This function is called when the remote supported features
1021 * complete event is received from the HCI.
1022 *
1023 * Returns void
1024 *
1025 ******************************************************************************/
btm_read_remote_features_complete(uint8_t * p)1026 void btm_read_remote_features_complete(uint8_t* p) {
1027 tACL_CONN* p_acl_cb;
1028 uint8_t status;
1029 uint16_t handle;
1030 uint8_t acl_idx;
1031
1032 BTM_TRACE_DEBUG("btm_read_remote_features_complete");
1033 STREAM_TO_UINT8(status, p);
1034
1035 if (status != HCI_SUCCESS) {
1036 BTM_TRACE_ERROR("btm_read_remote_features_complete failed (status 0x%02x)",
1037 status);
1038 return;
1039 }
1040
1041 STREAM_TO_UINT16(handle, p);
1042
1043 acl_idx = btm_handle_to_acl_index(handle);
1044 if (acl_idx >= MAX_L2CAP_LINKS) {
1045 BTM_TRACE_ERROR("btm_read_remote_features_complete handle=%d invalid",
1046 handle);
1047 return;
1048 }
1049
1050 p_acl_cb = &btm_cb.acl_db[acl_idx];
1051
1052 /* Copy the received features page */
1053 STREAM_TO_ARRAY(p_acl_cb->peer_lmp_feature_pages[0], p,
1054 HCI_FEATURE_BYTES_PER_PAGE);
1055
1056 if ((HCI_LMP_EXTENDED_SUPPORTED(p_acl_cb->peer_lmp_feature_pages[0])) &&
1057 (controller_get_interface()
1058 ->supports_reading_remote_extended_features())) {
1059 /* if the remote controller has extended features and local controller
1060 supports HCI_Read_Remote_Extended_Features command then start reading
1061 these feature starting with extended features page 1 */
1062 BTM_TRACE_DEBUG("Start reading remote extended features");
1063 btm_read_remote_ext_features(handle, 1);
1064 return;
1065 }
1066
1067 /* Remote controller has no extended features. Process remote controller
1068 supported features (features page 0). */
1069 btm_process_remote_ext_features(p_acl_cb, 1);
1070
1071 /* Continue with HCI connection establishment */
1072 btm_establish_continue(p_acl_cb);
1073 }
1074
1075 /*******************************************************************************
1076 *
1077 * Function btm_read_remote_ext_features_complete
1078 *
1079 * Description This function is called when the remote extended features
1080 * complete event is received from the HCI.
1081 *
1082 * Returns void
1083 *
1084 ******************************************************************************/
btm_read_remote_ext_features_complete(uint8_t * p)1085 void btm_read_remote_ext_features_complete(uint8_t* p) {
1086 tACL_CONN* p_acl_cb;
1087 uint8_t page_num, max_page;
1088 uint16_t handle;
1089 uint8_t acl_idx;
1090
1091 BTM_TRACE_DEBUG("btm_read_remote_ext_features_complete");
1092
1093 ++p;
1094 STREAM_TO_UINT16(handle, p);
1095 STREAM_TO_UINT8(page_num, p);
1096 STREAM_TO_UINT8(max_page, p);
1097
1098 /* Validate parameters */
1099 acl_idx = btm_handle_to_acl_index(handle);
1100 if (acl_idx >= MAX_L2CAP_LINKS) {
1101 BTM_TRACE_ERROR("btm_read_remote_ext_features_complete handle=%d invalid",
1102 handle);
1103 return;
1104 }
1105
1106 if (max_page > HCI_EXT_FEATURES_PAGE_MAX) {
1107 BTM_TRACE_ERROR("btm_read_remote_ext_features_complete page=%d unknown",
1108 max_page);
1109 return;
1110 }
1111
1112 p_acl_cb = &btm_cb.acl_db[acl_idx];
1113
1114 /* Copy the received features page */
1115 STREAM_TO_ARRAY(p_acl_cb->peer_lmp_feature_pages[page_num], p,
1116 HCI_FEATURE_BYTES_PER_PAGE);
1117
1118 /* If there is the next remote features page and
1119 * we have space to keep this page data - read this page */
1120 if ((page_num < max_page) && (page_num < HCI_EXT_FEATURES_PAGE_MAX)) {
1121 page_num++;
1122 BTM_TRACE_DEBUG("BTM reads next remote extended features page (%d)",
1123 page_num);
1124 btm_read_remote_ext_features(handle, page_num);
1125 return;
1126 }
1127
1128 /* Reading of remote feature pages is complete */
1129 BTM_TRACE_DEBUG("BTM reached last remote extended features page (%d)",
1130 page_num);
1131
1132 /* Process the pages */
1133 btm_process_remote_ext_features(p_acl_cb, (uint8_t)(page_num + 1));
1134
1135 /* Continue with HCI connection establishment */
1136 btm_establish_continue(p_acl_cb);
1137 }
1138
1139 /*******************************************************************************
1140 *
1141 * Function btm_read_remote_ext_features_failed
1142 *
1143 * Description This function is called when the remote extended features
1144 * complete event returns a failed status.
1145 *
1146 * Returns void
1147 *
1148 ******************************************************************************/
btm_read_remote_ext_features_failed(uint8_t status,uint16_t handle)1149 void btm_read_remote_ext_features_failed(uint8_t status, uint16_t handle) {
1150 tACL_CONN* p_acl_cb;
1151 uint8_t acl_idx;
1152
1153 BTM_TRACE_WARNING(
1154 "btm_read_remote_ext_features_failed (status 0x%02x) for handle %d",
1155 status, handle);
1156
1157 acl_idx = btm_handle_to_acl_index(handle);
1158 if (acl_idx >= MAX_L2CAP_LINKS) {
1159 BTM_TRACE_ERROR("btm_read_remote_ext_features_failed handle=%d invalid",
1160 handle);
1161 return;
1162 }
1163
1164 p_acl_cb = &btm_cb.acl_db[acl_idx];
1165
1166 /* Process supported features only */
1167 btm_process_remote_ext_features(p_acl_cb, 1);
1168
1169 /* Continue HCI connection establishment */
1170 btm_establish_continue(p_acl_cb);
1171 }
1172
1173 /*******************************************************************************
1174 *
1175 * Function btm_establish_continue
1176 *
1177 * Description This function is called when the command complete message
1178 * is received from the HCI for the read local link policy
1179 * request.
1180 *
1181 * Returns void
1182 *
1183 ******************************************************************************/
btm_establish_continue(tACL_CONN * p_acl_cb)1184 void btm_establish_continue(tACL_CONN* p_acl_cb) {
1185 tBTM_BL_EVENT_DATA evt_data;
1186 BTM_TRACE_DEBUG("btm_establish_continue");
1187 #if (BTM_BYPASS_EXTRA_ACL_SETUP == FALSE)
1188 if (p_acl_cb->transport == BT_TRANSPORT_BR_EDR) {
1189 /* For now there are a some devices that do not like sending */
1190 /* commands events and data at the same time. */
1191 /* Set the packet types to the default allowed by the device */
1192 btm_set_packet_types(p_acl_cb, btm_cb.btm_acl_pkt_types_supported);
1193
1194 if (btm_cb.btm_def_link_policy)
1195 BTM_SetLinkPolicy(p_acl_cb->remote_addr, &btm_cb.btm_def_link_policy);
1196 }
1197 #endif
1198 if (p_acl_cb->link_up_issued) {
1199 BTM_TRACE_ERROR("%s: Already link is up ", __func__);
1200 return;
1201 }
1202 p_acl_cb->link_up_issued = true;
1203
1204 /* If anyone cares, tell him database changed */
1205 if (btm_cb.p_bl_changed_cb) {
1206 evt_data.event = BTM_BL_CONN_EVT;
1207 evt_data.conn.p_bda = &p_acl_cb->remote_addr;
1208 evt_data.conn.p_bdn = p_acl_cb->remote_name;
1209 evt_data.conn.p_dc = p_acl_cb->remote_dc;
1210 evt_data.conn.p_features = p_acl_cb->peer_lmp_feature_pages[0];
1211 evt_data.conn.handle = p_acl_cb->hci_handle;
1212 evt_data.conn.transport = p_acl_cb->transport;
1213
1214 (*btm_cb.p_bl_changed_cb)(&evt_data);
1215 }
1216 btm_acl_update_busy_level(BTM_BLI_ACL_UP_EVT);
1217 }
1218
1219 /*******************************************************************************
1220 *
1221 * Function BTM_SetDefaultLinkSuperTout
1222 *
1223 * Description Set the default value for HCI "Write Link Supervision
1224 * Timeout"
1225 * command to use when an ACL link is created.
1226 *
1227 * Returns void
1228 *
1229 ******************************************************************************/
BTM_SetDefaultLinkSuperTout(uint16_t timeout)1230 void BTM_SetDefaultLinkSuperTout(uint16_t timeout) {
1231 BTM_TRACE_DEBUG("BTM_SetDefaultLinkSuperTout");
1232 btm_cb.btm_def_link_super_tout = timeout;
1233 }
1234
1235 /*******************************************************************************
1236 *
1237 * Function BTM_GetLinkSuperTout
1238 *
1239 * Description Read the link supervision timeout value of the connection
1240 *
1241 * Returns status of the operation
1242 *
1243 ******************************************************************************/
BTM_GetLinkSuperTout(const RawAddress & remote_bda,uint16_t * p_timeout)1244 tBTM_STATUS BTM_GetLinkSuperTout(const RawAddress& remote_bda,
1245 uint16_t* p_timeout) {
1246 tACL_CONN* p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
1247
1248 BTM_TRACE_DEBUG("BTM_GetLinkSuperTout");
1249 if (p != (tACL_CONN*)NULL) {
1250 *p_timeout = p->link_super_tout;
1251 return (BTM_SUCCESS);
1252 }
1253 /* If here, no BD Addr found */
1254 return (BTM_UNKNOWN_ADDR);
1255 }
1256
1257 /*******************************************************************************
1258 *
1259 * Function BTM_SetLinkSuperTout
1260 *
1261 * Description Create and send HCI "Write Link Supervision Timeout" command
1262 *
1263 * Returns status of the operation
1264 *
1265 ******************************************************************************/
BTM_SetLinkSuperTout(const RawAddress & remote_bda,uint16_t timeout)1266 tBTM_STATUS BTM_SetLinkSuperTout(const RawAddress& remote_bda,
1267 uint16_t timeout) {
1268 tACL_CONN* p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
1269
1270 BTM_TRACE_DEBUG("BTM_SetLinkSuperTout");
1271 if (p != (tACL_CONN*)NULL) {
1272 p->link_super_tout = timeout;
1273
1274 /* Only send if current role is Master; 2.0 spec requires this */
1275 if (p->link_role == BTM_ROLE_MASTER) {
1276 btsnd_hcic_write_link_super_tout(LOCAL_BR_EDR_CONTROLLER_ID,
1277 p->hci_handle, timeout);
1278 return (BTM_CMD_STARTED);
1279 } else {
1280 return (BTM_SUCCESS);
1281 }
1282 }
1283
1284 /* If here, no BD Addr found */
1285 return (BTM_UNKNOWN_ADDR);
1286 }
1287
1288 /*******************************************************************************
1289 *
1290 * Function BTM_IsAclConnectionUp
1291 *
1292 * Description This function is called to check if an ACL connection exists
1293 * to a specific remote BD Address.
1294 *
1295 * Returns true if connection is up, else false.
1296 *
1297 ******************************************************************************/
BTM_IsAclConnectionUp(const RawAddress & remote_bda,tBT_TRANSPORT transport)1298 bool BTM_IsAclConnectionUp(const RawAddress& remote_bda,
1299 tBT_TRANSPORT transport) {
1300 tACL_CONN* p;
1301
1302 VLOG(2) << __func__ << " RemBdAddr: " << remote_bda;
1303
1304 p = btm_bda_to_acl(remote_bda, transport);
1305 if (p != (tACL_CONN*)NULL) {
1306 return (true);
1307 }
1308
1309 /* If here, no BD Addr found */
1310 return (false);
1311 }
1312
1313 /*******************************************************************************
1314 *
1315 * Function BTM_GetNumAclLinks
1316 *
1317 * Description This function is called to count the number of
1318 * ACL links that are active.
1319 *
1320 * Returns uint16_t Number of active ACL links
1321 *
1322 ******************************************************************************/
BTM_GetNumAclLinks(void)1323 uint16_t BTM_GetNumAclLinks(void) {
1324 uint16_t num_acl = 0;
1325
1326 for (uint16_t i = 0; i < MAX_L2CAP_LINKS; ++i) {
1327 if (btm_cb.acl_db[i].in_use) ++num_acl;
1328 }
1329
1330 return num_acl;
1331 }
1332
1333 /*******************************************************************************
1334 *
1335 * Function btm_get_acl_disc_reason_code
1336 *
1337 * Description This function is called to get the disconnection reason code
1338 * returned by the HCI at disconnection complete event.
1339 *
1340 * Returns true if connection is up, else false.
1341 *
1342 ******************************************************************************/
btm_get_acl_disc_reason_code(void)1343 uint16_t btm_get_acl_disc_reason_code(void) {
1344 uint8_t res = btm_cb.acl_disc_reason;
1345 BTM_TRACE_DEBUG("btm_get_acl_disc_reason_code");
1346 return (res);
1347 }
1348
1349 /*******************************************************************************
1350 *
1351 * Function BTM_GetHCIConnHandle
1352 *
1353 * Description This function is called to get the handle for an ACL
1354 * connection to a specific remote BD Address.
1355 *
1356 * Returns the handle of the connection, or 0xFFFF if none.
1357 *
1358 ******************************************************************************/
BTM_GetHCIConnHandle(const RawAddress & remote_bda,tBT_TRANSPORT transport)1359 uint16_t BTM_GetHCIConnHandle(const RawAddress& remote_bda,
1360 tBT_TRANSPORT transport) {
1361 tACL_CONN* p;
1362 BTM_TRACE_DEBUG("BTM_GetHCIConnHandle");
1363 p = btm_bda_to_acl(remote_bda, transport);
1364 if (p != (tACL_CONN*)NULL) {
1365 return (p->hci_handle);
1366 }
1367
1368 /* If here, no BD Addr found */
1369 return (0xFFFF);
1370 }
1371
1372 /*******************************************************************************
1373 *
1374 * Function btm_process_clk_off_comp_evt
1375 *
1376 * Description This function is called when clock offset command completes.
1377 *
1378 * Input Parms hci_handle - connection handle associated with the change
1379 * clock offset
1380 *
1381 * Returns void
1382 *
1383 ******************************************************************************/
btm_process_clk_off_comp_evt(uint16_t hci_handle,uint16_t clock_offset)1384 void btm_process_clk_off_comp_evt(uint16_t hci_handle, uint16_t clock_offset) {
1385 uint8_t xx;
1386 BTM_TRACE_DEBUG("btm_process_clk_off_comp_evt");
1387 /* Look up the connection by handle and set the current mode */
1388 xx = btm_handle_to_acl_index(hci_handle);
1389 if (xx < MAX_L2CAP_LINKS) btm_cb.acl_db[xx].clock_offset = clock_offset;
1390 }
1391
1392 /*******************************************************************************
1393 *
1394 * Function btm_blacklist_role_change_device
1395 *
1396 * Description This function is used to blacklist the device if the role
1397 * switch fails for maximum number of times. It also removes
1398 * the device from the black list if the role switch succeeds.
1399 *
1400 * Input Parms bd_addr - remote BD addr
1401 * hci_status - role switch status
1402 *
1403 * Returns void
1404 *
1405 *******************************************************************************/
btm_blacklist_role_change_device(const RawAddress & bd_addr,uint8_t hci_status)1406 void btm_blacklist_role_change_device(const RawAddress& bd_addr,
1407 uint8_t hci_status) {
1408 tACL_CONN* p = btm_bda_to_acl(bd_addr, BT_TRANSPORT_BR_EDR);
1409 tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
1410
1411 if (!p || !p_dev_rec) {
1412 return;
1413 }
1414 if (hci_status == HCI_SUCCESS) {
1415 p->switch_role_failed_attempts = 0;
1416 return;
1417 }
1418
1419 /* check for carkits */
1420 const uint32_t cod_audio_device =
1421 (BTM_COD_SERVICE_AUDIO | BTM_COD_MAJOR_AUDIO) << 8;
1422 const uint32_t cod =
1423 ((p_dev_rec->dev_class[0] << 16) | (p_dev_rec->dev_class[1] << 8) |
1424 p_dev_rec->dev_class[2]) &
1425 0xffffff;
1426 if ((hci_status != HCI_SUCCESS) &&
1427 ((p->switch_role_state == BTM_ACL_SWKEY_STATE_SWITCHING) ||
1428 (p->switch_role_state == BTM_ACL_SWKEY_STATE_IN_PROGRESS)) &&
1429 ((cod & cod_audio_device) == cod_audio_device) &&
1430 (!interop_match_addr(INTEROP_DYNAMIC_ROLE_SWITCH, &bd_addr))) {
1431 p->switch_role_failed_attempts++;
1432 if (p->switch_role_failed_attempts == BTM_MAX_SW_ROLE_FAILED_ATTEMPTS) {
1433 BTM_TRACE_WARNING(
1434 "%s: Device %s blacklisted for role switching - "
1435 "multiple role switch failed attempts: %u",
1436 __func__, bd_addr.ToString().c_str(), p->switch_role_failed_attempts);
1437 interop_database_add(INTEROP_DYNAMIC_ROLE_SWITCH, &bd_addr, 3);
1438 }
1439 }
1440 }
1441
1442 /*******************************************************************************
1443 *
1444 * Function btm_acl_role_changed
1445 *
1446 * Description This function is called whan a link's master/slave role
1447 * change event or command status event (with error) is
1448 * received. It updates the link control block, and calls the
1449 * registered callback with status and role (if registered).
1450 *
1451 * Returns void
1452 *
1453 ******************************************************************************/
btm_acl_role_changed(uint8_t hci_status,const RawAddress * bd_addr,uint8_t new_role)1454 void btm_acl_role_changed(uint8_t hci_status, const RawAddress* bd_addr,
1455 uint8_t new_role) {
1456 const RawAddress* p_bda =
1457 (bd_addr) ? bd_addr : &btm_cb.devcb.switch_role_ref_data.remote_bd_addr;
1458 tACL_CONN* p = btm_bda_to_acl(*p_bda, BT_TRANSPORT_BR_EDR);
1459 tBTM_ROLE_SWITCH_CMPL* p_data = &btm_cb.devcb.switch_role_ref_data;
1460 tBTM_SEC_DEV_REC* p_dev_rec;
1461
1462 BTM_TRACE_DEBUG("%s: peer %s hci_status:0x%x new_role:%d", __func__,
1463 (p_bda != nullptr) ? bd_addr->ToString().c_str() : "nullptr",
1464 hci_status, new_role);
1465 /* Ignore any stray events */
1466 if (p == NULL) {
1467 /* it could be a failure */
1468 if (hci_status != HCI_SUCCESS)
1469 btm_acl_report_role_change(hci_status, bd_addr);
1470 return;
1471 }
1472
1473 p_data->hci_status = hci_status;
1474
1475 if (hci_status == HCI_SUCCESS) {
1476 p_data->role = new_role;
1477 p_data->remote_bd_addr = *p_bda;
1478
1479 /* Update cached value */
1480 p->link_role = new_role;
1481
1482 /* Reload LSTO: link supervision timeout is reset in the LM after a role
1483 * switch */
1484 if (new_role == BTM_ROLE_MASTER) {
1485 BTM_SetLinkSuperTout(p->remote_addr, p->link_super_tout);
1486 }
1487 } else {
1488 /* so the BTM_BL_ROLE_CHG_EVT uses the old role */
1489 new_role = p->link_role;
1490 }
1491
1492 /* Check if any SCO req is pending for role change */
1493 btm_sco_chk_pend_rolechange(p->hci_handle);
1494
1495 /* if switching state is switching we need to turn encryption on */
1496 /* if idle, we did not change encryption */
1497 if (p->switch_role_state == BTM_ACL_SWKEY_STATE_SWITCHING) {
1498 btsnd_hcic_set_conn_encrypt(p->hci_handle, true);
1499 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_ENCRYPT_ON;
1500 p->switch_role_state = BTM_ACL_SWKEY_STATE_ENCRYPTION_ON;
1501 return;
1502 }
1503
1504 /* Set the switch_role_state to IDLE since the reply received from HCI */
1505 /* regardless of its result either success or failed. */
1506 if (p->switch_role_state == BTM_ACL_SWKEY_STATE_IN_PROGRESS) {
1507 p->switch_role_state = BTM_ACL_SWKEY_STATE_IDLE;
1508 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_IDLE;
1509 }
1510
1511 /* if role switch complete is needed, report it now */
1512 btm_acl_report_role_change(hci_status, bd_addr);
1513
1514 /* if role change event is registered, report it now */
1515 if (btm_cb.p_bl_changed_cb && (btm_cb.bl_evt_mask & BTM_BL_ROLE_CHG_MASK)) {
1516 tBTM_BL_ROLE_CHG_DATA evt;
1517 evt.event = BTM_BL_ROLE_CHG_EVT;
1518 evt.new_role = new_role;
1519 evt.p_bda = p_bda;
1520 evt.hci_status = hci_status;
1521 tBTM_BL_EVENT_DATA btm_bl_event_data;
1522 btm_bl_event_data.role_chg = evt;
1523 (*btm_cb.p_bl_changed_cb)(&btm_bl_event_data);
1524 }
1525
1526 BTM_TRACE_DEBUG(
1527 "%s: peer %s Role Switch Event: new_role 0x%02x, HCI Status 0x%02x, "
1528 "rs_st:%d",
1529 __func__, (p_bda != nullptr) ? p_bda->ToString().c_str() : "nullptr",
1530 p_data->role, p_data->hci_status, p->switch_role_state);
1531
1532 #if (BTM_DISC_DURING_RS == TRUE)
1533 /* If a disconnect is pending, issue it now that role switch has completed */
1534 p_dev_rec = btm_find_dev(*p_bda);
1535 if (p_dev_rec != NULL) {
1536 if (p_dev_rec->rs_disc_pending == BTM_SEC_DISC_PENDING) {
1537 BTM_TRACE_WARNING(
1538 "%s peer %s Issuing delayed HCI_Disconnect!!!", __func__,
1539 (p_bda != nullptr) ? p_bda->ToString().c_str() : "nullptr");
1540 btsnd_hcic_disconnect(p_dev_rec->hci_handle, HCI_ERR_PEER_USER);
1541 }
1542 BTM_TRACE_ERROR("%s: peer %s tBTM_SEC_DEV:0x%x rs_disc_pending=%d",
1543 __func__,
1544 (p_bda != nullptr) ? p_bda->ToString().c_str() : "nullptr",
1545 PTR_TO_UINT(p_dev_rec), p_dev_rec->rs_disc_pending);
1546 p_dev_rec->rs_disc_pending = BTM_SEC_RS_NOT_PENDING; /* reset flag */
1547 }
1548
1549 #endif
1550 }
1551
1552 /*******************************************************************************
1553 *
1554 * Function BTM_AllocateSCN
1555 *
1556 * Description Look through the Server Channel Numbers for a free one.
1557 *
1558 * Returns Allocated SCN number or 0 if none.
1559 *
1560 ******************************************************************************/
1561
BTM_AllocateSCN(void)1562 uint8_t BTM_AllocateSCN(void) {
1563 uint8_t x;
1564 BTM_TRACE_DEBUG("BTM_AllocateSCN");
1565
1566 // stack reserves scn 1 for HFP, HSP we still do the correct way
1567 for (x = 1; x < BTM_MAX_SCN; x++) {
1568 if (!btm_cb.btm_scn[x]) {
1569 btm_cb.btm_scn[x] = true;
1570 return (x + 1);
1571 }
1572 }
1573
1574 return (0); /* No free ports */
1575 }
1576
1577 /*******************************************************************************
1578 *
1579 * Function BTM_TryAllocateSCN
1580 *
1581 * Description Try to allocate a fixed server channel
1582 *
1583 * Returns Returns true if server channel was available
1584 *
1585 ******************************************************************************/
1586
BTM_TryAllocateSCN(uint8_t scn)1587 bool BTM_TryAllocateSCN(uint8_t scn) {
1588 /* Make sure we don't exceed max port range.
1589 * Stack reserves scn 1 for HFP, HSP we still do the correct way.
1590 */
1591 if ((scn >= BTM_MAX_SCN) || (scn == 1)) return false;
1592
1593 /* check if this port is available */
1594 if (!btm_cb.btm_scn[scn - 1]) {
1595 btm_cb.btm_scn[scn - 1] = true;
1596 return true;
1597 }
1598
1599 return (false); /* Port was busy */
1600 }
1601
1602 /*******************************************************************************
1603 *
1604 * Function BTM_FreeSCN
1605 *
1606 * Description Free the specified SCN.
1607 *
1608 * Returns true or false
1609 *
1610 ******************************************************************************/
BTM_FreeSCN(uint8_t scn)1611 bool BTM_FreeSCN(uint8_t scn) {
1612 BTM_TRACE_DEBUG("BTM_FreeSCN ");
1613 if (scn <= BTM_MAX_SCN) {
1614 btm_cb.btm_scn[scn - 1] = false;
1615 return (true);
1616 } else {
1617 return (false); /* Illegal SCN passed in */
1618 }
1619 }
1620
1621 /*******************************************************************************
1622 *
1623 * Function btm_set_packet_types
1624 *
1625 * Description This function sets the packet types used for a specific
1626 * ACL connection. It is called internally by btm_acl_created
1627 * or by an application/profile by BTM_SetPacketTypes.
1628 *
1629 * Returns status of the operation
1630 *
1631 ******************************************************************************/
btm_set_packet_types(tACL_CONN * p,uint16_t pkt_types)1632 tBTM_STATUS btm_set_packet_types(tACL_CONN* p, uint16_t pkt_types) {
1633 uint16_t temp_pkt_types;
1634 BTM_TRACE_DEBUG("btm_set_packet_types");
1635 /* Save in the ACL control blocks, types that we support */
1636 temp_pkt_types = (pkt_types & BTM_ACL_SUPPORTED_PKTS_MASK &
1637 btm_cb.btm_acl_pkt_types_supported);
1638
1639 /* OR in any exception packet types if at least 2.0 version of spec */
1640 temp_pkt_types |=
1641 ((pkt_types & BTM_ACL_EXCEPTION_PKTS_MASK) |
1642 (btm_cb.btm_acl_pkt_types_supported & BTM_ACL_EXCEPTION_PKTS_MASK));
1643
1644 /* Exclude packet types not supported by the peer */
1645 btm_acl_chk_peer_pkt_type_support(p, &temp_pkt_types);
1646
1647 BTM_TRACE_DEBUG("SetPacketType Mask -> 0x%04x", temp_pkt_types);
1648
1649 btsnd_hcic_change_conn_type(p->hci_handle, temp_pkt_types);
1650 p->pkt_types_mask = temp_pkt_types;
1651
1652 return (BTM_CMD_STARTED);
1653 }
1654
1655 /*******************************************************************************
1656 *
1657 * Function btm_get_max_packet_size
1658 *
1659 * Returns Returns maximum packet size that can be used for current
1660 * connection, 0 if connection is not established
1661 *
1662 ******************************************************************************/
btm_get_max_packet_size(const RawAddress & addr)1663 uint16_t btm_get_max_packet_size(const RawAddress& addr) {
1664 tACL_CONN* p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
1665 uint16_t pkt_types = 0;
1666 uint16_t pkt_size = 0;
1667 BTM_TRACE_DEBUG("btm_get_max_packet_size");
1668 if (p != NULL) {
1669 pkt_types = p->pkt_types_mask;
1670 } else {
1671 /* Special case for when info for the local device is requested */
1672 if (addr == *controller_get_interface()->get_address()) {
1673 pkt_types = btm_cb.btm_acl_pkt_types_supported;
1674 }
1675 }
1676
1677 if (pkt_types) {
1678 if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_3_DH5))
1679 pkt_size = HCI_EDR3_DH5_PACKET_SIZE;
1680 else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_2_DH5))
1681 pkt_size = HCI_EDR2_DH5_PACKET_SIZE;
1682 else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_3_DH3))
1683 pkt_size = HCI_EDR3_DH3_PACKET_SIZE;
1684 else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DH5)
1685 pkt_size = HCI_DH5_PACKET_SIZE;
1686 else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_2_DH3))
1687 pkt_size = HCI_EDR2_DH3_PACKET_SIZE;
1688 else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DM5)
1689 pkt_size = HCI_DM5_PACKET_SIZE;
1690 else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DH3)
1691 pkt_size = HCI_DH3_PACKET_SIZE;
1692 else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DM3)
1693 pkt_size = HCI_DM3_PACKET_SIZE;
1694 else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_3_DH1))
1695 pkt_size = HCI_EDR3_DH1_PACKET_SIZE;
1696 else if (!(pkt_types & BTM_ACL_PKT_TYPES_MASK_NO_2_DH1))
1697 pkt_size = HCI_EDR2_DH1_PACKET_SIZE;
1698 else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DH1)
1699 pkt_size = HCI_DH1_PACKET_SIZE;
1700 else if (pkt_types & BTM_ACL_PKT_TYPES_MASK_DM1)
1701 pkt_size = HCI_DM1_PACKET_SIZE;
1702 }
1703
1704 return (pkt_size);
1705 }
1706
1707 /*******************************************************************************
1708 *
1709 * Function BTM_ReadRemoteVersion
1710 *
1711 * Returns If connected report peer device info
1712 *
1713 ******************************************************************************/
BTM_ReadRemoteVersion(const RawAddress & addr,uint8_t * lmp_version,uint16_t * manufacturer,uint16_t * lmp_sub_version)1714 tBTM_STATUS BTM_ReadRemoteVersion(const RawAddress& addr, uint8_t* lmp_version,
1715 uint16_t* manufacturer,
1716 uint16_t* lmp_sub_version) {
1717 tACL_CONN* p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
1718 BTM_TRACE_DEBUG("BTM_ReadRemoteVersion");
1719 if (p == NULL) return (BTM_UNKNOWN_ADDR);
1720
1721 if (lmp_version) *lmp_version = p->lmp_version;
1722
1723 if (manufacturer) *manufacturer = p->manufacturer;
1724
1725 if (lmp_sub_version) *lmp_sub_version = p->lmp_subversion;
1726
1727 return (BTM_SUCCESS);
1728 }
1729
1730 /*******************************************************************************
1731 *
1732 * Function BTM_ReadRemoteFeatures
1733 *
1734 * Returns pointer to the remote supported features mask (8 bytes)
1735 *
1736 ******************************************************************************/
BTM_ReadRemoteFeatures(const RawAddress & addr)1737 uint8_t* BTM_ReadRemoteFeatures(const RawAddress& addr) {
1738 tACL_CONN* p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
1739 BTM_TRACE_DEBUG("BTM_ReadRemoteFeatures");
1740 if (p == NULL) {
1741 return (NULL);
1742 }
1743
1744 return (p->peer_lmp_feature_pages[0]);
1745 }
1746
1747 /*******************************************************************************
1748 *
1749 * Function BTM_ReadRemoteExtendedFeatures
1750 *
1751 * Returns pointer to the remote extended features mask (8 bytes)
1752 * or NULL if bad page
1753 *
1754 ******************************************************************************/
BTM_ReadRemoteExtendedFeatures(const RawAddress & addr,uint8_t page_number)1755 uint8_t* BTM_ReadRemoteExtendedFeatures(const RawAddress& addr,
1756 uint8_t page_number) {
1757 tACL_CONN* p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
1758 BTM_TRACE_DEBUG("BTM_ReadRemoteExtendedFeatures");
1759 if (p == NULL) {
1760 return (NULL);
1761 }
1762
1763 if (page_number > HCI_EXT_FEATURES_PAGE_MAX) {
1764 BTM_TRACE_ERROR("Warning: BTM_ReadRemoteExtendedFeatures page %d unknown",
1765 page_number);
1766 return NULL;
1767 }
1768
1769 return (p->peer_lmp_feature_pages[page_number]);
1770 }
1771
1772 /*******************************************************************************
1773 *
1774 * Function BTM_ReadNumberRemoteFeaturesPages
1775 *
1776 * Returns number of features pages read from the remote device.
1777 *
1778 ******************************************************************************/
BTM_ReadNumberRemoteFeaturesPages(const RawAddress & addr)1779 uint8_t BTM_ReadNumberRemoteFeaturesPages(const RawAddress& addr) {
1780 tACL_CONN* p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
1781 BTM_TRACE_DEBUG("BTM_ReadNumberRemoteFeaturesPages");
1782 if (p == NULL) {
1783 return (0);
1784 }
1785
1786 return (p->num_read_pages);
1787 }
1788
1789 /*******************************************************************************
1790 *
1791 * Function BTM_ReadAllRemoteFeatures
1792 *
1793 * Returns pointer to all features of the remote (24 bytes).
1794 *
1795 ******************************************************************************/
BTM_ReadAllRemoteFeatures(const RawAddress & addr)1796 uint8_t* BTM_ReadAllRemoteFeatures(const RawAddress& addr) {
1797 tACL_CONN* p = btm_bda_to_acl(addr, BT_TRANSPORT_BR_EDR);
1798 BTM_TRACE_DEBUG("BTM_ReadAllRemoteFeatures");
1799 if (p == NULL) {
1800 return (NULL);
1801 }
1802
1803 return (p->peer_lmp_feature_pages[0]);
1804 }
1805
1806 /*******************************************************************************
1807 *
1808 * Function BTM_RegBusyLevelNotif
1809 *
1810 * Description This function is called to register a callback to receive
1811 * busy level change events.
1812 *
1813 * Returns BTM_SUCCESS if successfully registered, otherwise error
1814 *
1815 ******************************************************************************/
BTM_RegBusyLevelNotif(tBTM_BL_CHANGE_CB * p_cb,uint8_t * p_level,tBTM_BL_EVENT_MASK evt_mask)1816 tBTM_STATUS BTM_RegBusyLevelNotif(tBTM_BL_CHANGE_CB* p_cb, uint8_t* p_level,
1817 tBTM_BL_EVENT_MASK evt_mask) {
1818 BTM_TRACE_DEBUG("BTM_RegBusyLevelNotif");
1819 if (p_level) *p_level = btm_cb.busy_level;
1820
1821 btm_cb.bl_evt_mask = evt_mask;
1822
1823 if (!p_cb)
1824 btm_cb.p_bl_changed_cb = NULL;
1825 else if (btm_cb.p_bl_changed_cb)
1826 return (BTM_BUSY);
1827 else
1828 btm_cb.p_bl_changed_cb = p_cb;
1829
1830 return (BTM_SUCCESS);
1831 }
1832
1833 /*******************************************************************************
1834 *
1835 * Function BTM_SetQoS
1836 *
1837 * Description This function is called to setup QoS
1838 *
1839 * Returns status of the operation
1840 *
1841 ******************************************************************************/
BTM_SetQoS(const RawAddress & bd,FLOW_SPEC * p_flow,tBTM_CMPL_CB * p_cb)1842 tBTM_STATUS BTM_SetQoS(const RawAddress& bd, FLOW_SPEC* p_flow,
1843 tBTM_CMPL_CB* p_cb) {
1844 tACL_CONN* p = &btm_cb.acl_db[0];
1845
1846 VLOG(2) << __func__ << " BdAddr: " << bd;
1847
1848 /* If someone already waiting on the version, do not allow another */
1849 if (btm_cb.devcb.p_qos_setup_cmpl_cb) return (BTM_BUSY);
1850
1851 p = btm_bda_to_acl(bd, BT_TRANSPORT_BR_EDR);
1852 if (p != NULL) {
1853 btm_cb.devcb.p_qos_setup_cmpl_cb = p_cb;
1854 alarm_set_on_mloop(btm_cb.devcb.qos_setup_timer, BTM_DEV_REPLY_TIMEOUT_MS,
1855 btm_qos_setup_timeout, NULL);
1856
1857 btsnd_hcic_qos_setup(p->hci_handle, p_flow->qos_flags, p_flow->service_type,
1858 p_flow->token_rate, p_flow->peak_bandwidth,
1859 p_flow->latency, p_flow->delay_variation);
1860 return (BTM_CMD_STARTED);
1861 }
1862
1863 /* If here, no BD Addr found */
1864 return (BTM_UNKNOWN_ADDR);
1865 }
1866
1867 /*******************************************************************************
1868 *
1869 * Function btm_qos_setup_timeout
1870 *
1871 * Description Callback when QoS setup times out.
1872 *
1873 * Returns void
1874 *
1875 ******************************************************************************/
btm_qos_setup_timeout(UNUSED_ATTR void * data)1876 void btm_qos_setup_timeout(UNUSED_ATTR void* data) {
1877 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_qos_setup_cmpl_cb;
1878 btm_cb.devcb.p_qos_setup_cmpl_cb = NULL;
1879 if (p_cb) (*p_cb)((void*)NULL);
1880 }
1881
1882 /*******************************************************************************
1883 *
1884 * Function btm_qos_setup_complete
1885 *
1886 * Description This function is called when the command complete message
1887 * is received from the HCI for the qos setup request.
1888 *
1889 * Returns void
1890 *
1891 ******************************************************************************/
btm_qos_setup_complete(uint8_t status,uint16_t handle,FLOW_SPEC * p_flow)1892 void btm_qos_setup_complete(uint8_t status, uint16_t handle,
1893 FLOW_SPEC* p_flow) {
1894 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_qos_setup_cmpl_cb;
1895 tBTM_QOS_SETUP_CMPL qossu;
1896
1897 BTM_TRACE_DEBUG("%s", __func__);
1898 alarm_cancel(btm_cb.devcb.qos_setup_timer);
1899 btm_cb.devcb.p_qos_setup_cmpl_cb = NULL;
1900
1901 /* If there was a registered callback, call it */
1902 if (p_cb) {
1903 memset(&qossu, 0, sizeof(tBTM_QOS_SETUP_CMPL));
1904 qossu.status = status;
1905 qossu.handle = handle;
1906 if (p_flow != NULL) {
1907 qossu.flow.qos_flags = p_flow->qos_flags;
1908 qossu.flow.service_type = p_flow->service_type;
1909 qossu.flow.token_rate = p_flow->token_rate;
1910 qossu.flow.peak_bandwidth = p_flow->peak_bandwidth;
1911 qossu.flow.latency = p_flow->latency;
1912 qossu.flow.delay_variation = p_flow->delay_variation;
1913 }
1914 BTM_TRACE_DEBUG("BTM: p_flow->delay_variation: 0x%02x",
1915 qossu.flow.delay_variation);
1916 (*p_cb)(&qossu);
1917 }
1918 }
1919
1920 /*******************************************************************************
1921 *
1922 * Function BTM_ReadRSSI
1923 *
1924 * Description This function is called to read the link policy settings.
1925 * The address of link policy results are returned in the
1926 * callback.
1927 * (tBTM_RSSI_RESULT)
1928 *
1929 * Returns BTM_CMD_STARTED if successfully initiated or error code
1930 *
1931 ******************************************************************************/
BTM_ReadRSSI(const RawAddress & remote_bda,tBTM_CMPL_CB * p_cb)1932 tBTM_STATUS BTM_ReadRSSI(const RawAddress& remote_bda, tBTM_CMPL_CB* p_cb) {
1933 tACL_CONN* p = NULL;
1934 tBT_DEVICE_TYPE dev_type;
1935 tBLE_ADDR_TYPE addr_type;
1936
1937 /* If someone already waiting on the version, do not allow another */
1938 if (btm_cb.devcb.p_rssi_cmpl_cb) return (BTM_BUSY);
1939
1940 BTM_ReadDevInfo(remote_bda, &dev_type, &addr_type);
1941
1942 if (dev_type & BT_DEVICE_TYPE_BLE) {
1943 p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_LE);
1944 }
1945
1946 if (p == NULL && dev_type & BT_DEVICE_TYPE_BREDR) {
1947 p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
1948 }
1949
1950 if (p) {
1951 btm_cb.devcb.p_rssi_cmpl_cb = p_cb;
1952 alarm_set_on_mloop(btm_cb.devcb.read_rssi_timer, BTM_DEV_REPLY_TIMEOUT_MS,
1953 btm_read_rssi_timeout, NULL);
1954
1955 btsnd_hcic_read_rssi(p->hci_handle);
1956 return (BTM_CMD_STARTED);
1957 }
1958
1959 /* If here, no BD Addr found */
1960 return (BTM_UNKNOWN_ADDR);
1961 }
1962
1963 /*******************************************************************************
1964 *
1965 * Function BTM_ReadFailedContactCounter
1966 *
1967 * Description This function is called to read the failed contact counter.
1968 * The result is returned in the callback.
1969 * (tBTM_FAILED_CONTACT_COUNTER_RESULT)
1970 *
1971 * Returns BTM_CMD_STARTED if successfully initiated or error code
1972 *
1973 ******************************************************************************/
BTM_ReadFailedContactCounter(const RawAddress & remote_bda,tBTM_CMPL_CB * p_cb)1974 tBTM_STATUS BTM_ReadFailedContactCounter(const RawAddress& remote_bda,
1975 tBTM_CMPL_CB* p_cb) {
1976 tACL_CONN* p;
1977 tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
1978 tBT_DEVICE_TYPE dev_type;
1979 tBLE_ADDR_TYPE addr_type;
1980
1981 /* If someone already waiting on the result, do not allow another */
1982 if (btm_cb.devcb.p_failed_contact_counter_cmpl_cb) return (BTM_BUSY);
1983
1984 BTM_ReadDevInfo(remote_bda, &dev_type, &addr_type);
1985 if (dev_type == BT_DEVICE_TYPE_BLE) transport = BT_TRANSPORT_LE;
1986
1987 p = btm_bda_to_acl(remote_bda, transport);
1988 if (p != (tACL_CONN*)NULL) {
1989 btm_cb.devcb.p_failed_contact_counter_cmpl_cb = p_cb;
1990 alarm_set_on_mloop(btm_cb.devcb.read_failed_contact_counter_timer,
1991 BTM_DEV_REPLY_TIMEOUT_MS,
1992 btm_read_failed_contact_counter_timeout, NULL);
1993
1994 btsnd_hcic_read_failed_contact_counter(p->hci_handle);
1995 return (BTM_CMD_STARTED);
1996 }
1997
1998 /* If here, no BD Addr found */
1999 return (BTM_UNKNOWN_ADDR);
2000 }
2001
2002 /*******************************************************************************
2003 *
2004 * Function BTM_ReadAutomaticFlushTimeout
2005 *
2006 * Description This function is called to read the automatic flush timeout.
2007 * The result is returned in the callback.
2008 * (tBTM_AUTOMATIC_FLUSH_TIMEOUT_RESULT)
2009 *
2010 * Returns BTM_CMD_STARTED if successfully initiated or error code
2011 *
2012 ******************************************************************************/
BTM_ReadAutomaticFlushTimeout(const RawAddress & remote_bda,tBTM_CMPL_CB * p_cb)2013 tBTM_STATUS BTM_ReadAutomaticFlushTimeout(const RawAddress& remote_bda,
2014 tBTM_CMPL_CB* p_cb) {
2015 tACL_CONN* p;
2016 tBT_TRANSPORT transport = BT_TRANSPORT_BR_EDR;
2017 tBT_DEVICE_TYPE dev_type;
2018 tBLE_ADDR_TYPE addr_type;
2019
2020 /* If someone already waiting on the result, do not allow another */
2021 if (btm_cb.devcb.p_automatic_flush_timeout_cmpl_cb) return (BTM_BUSY);
2022
2023 BTM_ReadDevInfo(remote_bda, &dev_type, &addr_type);
2024 if (dev_type == BT_DEVICE_TYPE_BLE) transport = BT_TRANSPORT_LE;
2025
2026 p = btm_bda_to_acl(remote_bda, transport);
2027 if (!p) return BTM_UNKNOWN_ADDR;
2028
2029 btm_cb.devcb.p_automatic_flush_timeout_cmpl_cb = p_cb;
2030 alarm_set_on_mloop(btm_cb.devcb.read_automatic_flush_timeout_timer,
2031 BTM_DEV_REPLY_TIMEOUT_MS,
2032 btm_read_automatic_flush_timeout_timeout, nullptr);
2033
2034 btsnd_hcic_read_automatic_flush_timeout(p->hci_handle);
2035 return BTM_CMD_STARTED;
2036 }
2037
2038 /*******************************************************************************
2039 *
2040 * Function BTM_ReadLinkQuality
2041 *
2042 * Description This function is called to read the link qulaity.
2043 * The value of the link quality is returned in the callback.
2044 * (tBTM_LINK_QUALITY_RESULT)
2045 *
2046 * Returns BTM_CMD_STARTED if successfully initiated or error code
2047 *
2048 ******************************************************************************/
BTM_ReadLinkQuality(const RawAddress & remote_bda,tBTM_CMPL_CB * p_cb)2049 tBTM_STATUS BTM_ReadLinkQuality(const RawAddress& remote_bda,
2050 tBTM_CMPL_CB* p_cb) {
2051 VLOG(2) << __func__ << ": RemBdAddr: " << remote_bda;
2052
2053 /* If someone already waiting on the version, do not allow another */
2054 if (btm_cb.devcb.p_link_qual_cmpl_cb) return (BTM_BUSY);
2055
2056 tACL_CONN* p = btm_bda_to_acl(remote_bda, BT_TRANSPORT_BR_EDR);
2057 if (p != (tACL_CONN*)NULL) {
2058 btm_cb.devcb.p_link_qual_cmpl_cb = p_cb;
2059 alarm_set_on_mloop(btm_cb.devcb.read_link_quality_timer,
2060 BTM_DEV_REPLY_TIMEOUT_MS, btm_read_link_quality_timeout,
2061 NULL);
2062
2063 btsnd_hcic_get_link_quality(p->hci_handle);
2064 return (BTM_CMD_STARTED);
2065 }
2066
2067 /* If here, no BD Addr found */
2068 return (BTM_UNKNOWN_ADDR);
2069 }
2070
2071 /*******************************************************************************
2072 *
2073 * Function BTM_ReadTxPower
2074 *
2075 * Description This function is called to read the current
2076 * TX power of the connection. The tx power level results
2077 * are returned in the callback.
2078 * (tBTM_RSSI_RESULT)
2079 *
2080 * Returns BTM_CMD_STARTED if successfully initiated or error code
2081 *
2082 ******************************************************************************/
BTM_ReadTxPower(const RawAddress & remote_bda,tBT_TRANSPORT transport,tBTM_CMPL_CB * p_cb)2083 tBTM_STATUS BTM_ReadTxPower(const RawAddress& remote_bda,
2084 tBT_TRANSPORT transport, tBTM_CMPL_CB* p_cb) {
2085 tACL_CONN* p;
2086 #define BTM_READ_RSSI_TYPE_CUR 0x00
2087 #define BTM_READ_RSSI_TYPE_MAX 0X01
2088
2089 VLOG(2) << __func__ << ": RemBdAddr: " << remote_bda;
2090
2091 /* If someone already waiting on the version, do not allow another */
2092 if (btm_cb.devcb.p_tx_power_cmpl_cb) return (BTM_BUSY);
2093
2094 p = btm_bda_to_acl(remote_bda, transport);
2095 if (p != (tACL_CONN*)NULL) {
2096 btm_cb.devcb.p_tx_power_cmpl_cb = p_cb;
2097 alarm_set_on_mloop(btm_cb.devcb.read_tx_power_timer,
2098 BTM_DEV_REPLY_TIMEOUT_MS, btm_read_tx_power_timeout,
2099 NULL);
2100
2101 if (p->transport == BT_TRANSPORT_LE) {
2102 btm_cb.devcb.read_tx_pwr_addr = remote_bda;
2103 btsnd_hcic_ble_read_adv_chnl_tx_power();
2104 } else {
2105 btsnd_hcic_read_tx_power(p->hci_handle, BTM_READ_RSSI_TYPE_CUR);
2106 }
2107
2108 return (BTM_CMD_STARTED);
2109 }
2110
2111 /* If here, no BD Addr found */
2112 return (BTM_UNKNOWN_ADDR);
2113 }
2114
2115 /*******************************************************************************
2116 *
2117 * Function btm_read_tx_power_timeout
2118 *
2119 * Description Callback when reading the tx power times out.
2120 *
2121 * Returns void
2122 *
2123 ******************************************************************************/
btm_read_tx_power_timeout(UNUSED_ATTR void * data)2124 void btm_read_tx_power_timeout(UNUSED_ATTR void* data) {
2125 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_tx_power_cmpl_cb;
2126 btm_cb.devcb.p_tx_power_cmpl_cb = NULL;
2127 if (p_cb) (*p_cb)((void*)NULL);
2128 }
2129
2130 /*******************************************************************************
2131 *
2132 * Function btm_read_tx_power_complete
2133 *
2134 * Description This function is called when the command complete message
2135 * is received from the HCI for the read tx power request.
2136 *
2137 * Returns void
2138 *
2139 ******************************************************************************/
btm_read_tx_power_complete(uint8_t * p,bool is_ble)2140 void btm_read_tx_power_complete(uint8_t* p, bool is_ble) {
2141 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_tx_power_cmpl_cb;
2142 tBTM_TX_POWER_RESULT result;
2143 tACL_CONN* p_acl_cb = &btm_cb.acl_db[0];
2144
2145 BTM_TRACE_DEBUG("%s", __func__);
2146 alarm_cancel(btm_cb.devcb.read_tx_power_timer);
2147 btm_cb.devcb.p_tx_power_cmpl_cb = NULL;
2148
2149 /* If there was a registered callback, call it */
2150 if (p_cb) {
2151 STREAM_TO_UINT8(result.hci_status, p);
2152
2153 if (result.hci_status == HCI_SUCCESS) {
2154 result.status = BTM_SUCCESS;
2155
2156 if (!is_ble) {
2157 uint16_t handle;
2158 STREAM_TO_UINT16(handle, p);
2159 STREAM_TO_UINT8(result.tx_power, p);
2160
2161 /* Search through the list of active channels for the correct BD Addr */
2162 for (uint16_t index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
2163 if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
2164 result.rem_bda = p_acl_cb->remote_addr;
2165 break;
2166 }
2167 }
2168 } else {
2169 STREAM_TO_UINT8(result.tx_power, p);
2170 result.rem_bda = btm_cb.devcb.read_tx_pwr_addr;
2171 }
2172 BTM_TRACE_DEBUG("BTM TX power Complete: tx_power %d, hci status 0x%02x",
2173 result.tx_power, result.hci_status);
2174 } else {
2175 result.status = BTM_ERR_PROCESSING;
2176 }
2177
2178 (*p_cb)(&result);
2179 }
2180 }
2181
2182 /*******************************************************************************
2183 *
2184 * Function btm_read_rssi_timeout
2185 *
2186 * Description Callback when reading the RSSI times out.
2187 *
2188 * Returns void
2189 *
2190 ******************************************************************************/
btm_read_rssi_timeout(UNUSED_ATTR void * data)2191 void btm_read_rssi_timeout(UNUSED_ATTR void* data) {
2192 tBTM_RSSI_RESULT result;
2193 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_rssi_cmpl_cb;
2194 btm_cb.devcb.p_rssi_cmpl_cb = NULL;
2195 result.status = BTM_DEVICE_TIMEOUT;
2196 if (p_cb) (*p_cb)(&result);
2197 }
2198
2199 /*******************************************************************************
2200 *
2201 * Function btm_read_rssi_complete
2202 *
2203 * Description This function is called when the command complete message
2204 * is received from the HCI for the read rssi request.
2205 *
2206 * Returns void
2207 *
2208 ******************************************************************************/
btm_read_rssi_complete(uint8_t * p)2209 void btm_read_rssi_complete(uint8_t* p) {
2210 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_rssi_cmpl_cb;
2211 tBTM_RSSI_RESULT result;
2212 tACL_CONN* p_acl_cb = &btm_cb.acl_db[0];
2213
2214 BTM_TRACE_DEBUG("%s", __func__);
2215 alarm_cancel(btm_cb.devcb.read_rssi_timer);
2216 btm_cb.devcb.p_rssi_cmpl_cb = NULL;
2217
2218 /* If there was a registered callback, call it */
2219 if (p_cb) {
2220 STREAM_TO_UINT8(result.hci_status, p);
2221
2222 if (result.hci_status == HCI_SUCCESS) {
2223 uint16_t handle;
2224 result.status = BTM_SUCCESS;
2225
2226 STREAM_TO_UINT16(handle, p);
2227
2228 STREAM_TO_UINT8(result.rssi, p);
2229 BTM_TRACE_DEBUG("BTM RSSI Complete: rssi %d, hci status 0x%02x",
2230 result.rssi, result.hci_status);
2231
2232 /* Search through the list of active channels for the correct BD Addr */
2233 for (uint16_t index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
2234 if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
2235 result.rem_bda = p_acl_cb->remote_addr;
2236 break;
2237 }
2238 }
2239 } else {
2240 result.status = BTM_ERR_PROCESSING;
2241 }
2242
2243 (*p_cb)(&result);
2244 }
2245 }
2246
2247 /*******************************************************************************
2248 *
2249 * Function btm_read_failed_contact_counter_timeout
2250 *
2251 * Description Callback when reading the failed contact counter times out.
2252 *
2253 * Returns void
2254 *
2255 ******************************************************************************/
btm_read_failed_contact_counter_timeout(UNUSED_ATTR void * data)2256 void btm_read_failed_contact_counter_timeout(UNUSED_ATTR void* data) {
2257 tBTM_FAILED_CONTACT_COUNTER_RESULT result;
2258 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_failed_contact_counter_cmpl_cb;
2259 btm_cb.devcb.p_failed_contact_counter_cmpl_cb = NULL;
2260 result.status = BTM_DEVICE_TIMEOUT;
2261 if (p_cb) (*p_cb)(&result);
2262 }
2263
2264 /*******************************************************************************
2265 *
2266 * Function btm_read_failed_contact_counter_complete
2267 *
2268 * Description This function is called when the command complete message
2269 * is received from the HCI for the read failed contact
2270 * counter request.
2271 *
2272 * Returns void
2273 *
2274 ******************************************************************************/
btm_read_failed_contact_counter_complete(uint8_t * p)2275 void btm_read_failed_contact_counter_complete(uint8_t* p) {
2276 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_failed_contact_counter_cmpl_cb;
2277 tBTM_FAILED_CONTACT_COUNTER_RESULT result;
2278 tACL_CONN* p_acl_cb = &btm_cb.acl_db[0];
2279
2280 BTM_TRACE_DEBUG("%s", __func__);
2281 alarm_cancel(btm_cb.devcb.read_failed_contact_counter_timer);
2282 btm_cb.devcb.p_failed_contact_counter_cmpl_cb = NULL;
2283
2284 /* If there was a registered callback, call it */
2285 if (p_cb) {
2286 uint16_t handle;
2287 STREAM_TO_UINT8(result.hci_status, p);
2288
2289 if (result.hci_status == HCI_SUCCESS) {
2290 result.status = BTM_SUCCESS;
2291
2292 STREAM_TO_UINT16(handle, p);
2293
2294 STREAM_TO_UINT16(result.failed_contact_counter, p);
2295 BTM_TRACE_DEBUG(
2296 "BTM Failed Contact Counter Complete: counter %u, hci status 0x%02x",
2297 result.failed_contact_counter, result.hci_status);
2298
2299 /* Search through the list of active channels for the correct BD Addr */
2300 for (uint16_t index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
2301 if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
2302 result.rem_bda = p_acl_cb->remote_addr;
2303 break;
2304 }
2305 }
2306 } else {
2307 result.status = BTM_ERR_PROCESSING;
2308 }
2309
2310 (*p_cb)(&result);
2311 }
2312 }
2313
2314 /*******************************************************************************
2315 *
2316 * Function btm_read_automatic_flush_timeout_timeout
2317 *
2318 * Description Callback when reading the automatic flush timeout times out.
2319 *
2320 * Returns void
2321 *
2322 ******************************************************************************/
btm_read_automatic_flush_timeout_timeout(UNUSED_ATTR void * data)2323 void btm_read_automatic_flush_timeout_timeout(UNUSED_ATTR void* data) {
2324 tBTM_AUTOMATIC_FLUSH_TIMEOUT_RESULT result;
2325 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_automatic_flush_timeout_cmpl_cb;
2326 btm_cb.devcb.p_automatic_flush_timeout_cmpl_cb = nullptr;
2327 result.status = BTM_DEVICE_TIMEOUT;
2328 if (p_cb) (*p_cb)(&result);
2329 }
2330
2331 /*******************************************************************************
2332 *
2333 * Function btm_read_automatic_flush_timeout_complete
2334 *
2335 * Description This function is called when the command complete message
2336 * is received from the HCI for the read automatic flush
2337 * timeout request.
2338 *
2339 * Returns void
2340 *
2341 ******************************************************************************/
btm_read_automatic_flush_timeout_complete(uint8_t * p)2342 void btm_read_automatic_flush_timeout_complete(uint8_t* p) {
2343 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_automatic_flush_timeout_cmpl_cb;
2344 tBTM_AUTOMATIC_FLUSH_TIMEOUT_RESULT result;
2345 tACL_CONN* p_acl_cb = &btm_cb.acl_db[0];
2346
2347 BTM_TRACE_DEBUG("%s", __func__);
2348 alarm_cancel(btm_cb.devcb.read_automatic_flush_timeout_timer);
2349 btm_cb.devcb.p_automatic_flush_timeout_cmpl_cb = nullptr;
2350
2351 /* If there was a registered callback, call it */
2352 if (p_cb) {
2353 uint16_t handle;
2354 STREAM_TO_UINT8(result.hci_status, p);
2355
2356 if (result.hci_status == HCI_SUCCESS) {
2357 result.status = BTM_SUCCESS;
2358
2359 STREAM_TO_UINT16(handle, p);
2360
2361 STREAM_TO_UINT16(result.automatic_flush_timeout, p);
2362 BTM_TRACE_DEBUG(
2363 "BTM Automatic Flush Timeout Complete: timeout %u, hci status 0x%02x",
2364 result.automatic_flush_timeout, result.hci_status);
2365
2366 /* Search through the list of active channels for the correct BD Addr */
2367 for (uint16_t index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
2368 if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
2369 result.rem_bda = p_acl_cb->remote_addr;
2370 break;
2371 }
2372 }
2373 } else {
2374 result.status = BTM_ERR_PROCESSING;
2375 }
2376
2377 (*p_cb)(&result);
2378 }
2379 }
2380
2381 /*******************************************************************************
2382 *
2383 * Function btm_read_link_quality_timeout
2384 *
2385 * Description Callback when reading the link quality times out.
2386 *
2387 * Returns void
2388 *
2389 ******************************************************************************/
btm_read_link_quality_timeout(UNUSED_ATTR void * data)2390 void btm_read_link_quality_timeout(UNUSED_ATTR void* data) {
2391 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_link_qual_cmpl_cb;
2392 btm_cb.devcb.p_link_qual_cmpl_cb = NULL;
2393 if (p_cb) (*p_cb)((void*)NULL);
2394 }
2395
2396 /*******************************************************************************
2397 *
2398 * Function btm_read_link_quality_complete
2399 *
2400 * Description This function is called when the command complete message
2401 * is received from the HCI for the read link quality.
2402 *
2403 * Returns void
2404 *
2405 ******************************************************************************/
btm_read_link_quality_complete(uint8_t * p)2406 void btm_read_link_quality_complete(uint8_t* p) {
2407 tBTM_CMPL_CB* p_cb = btm_cb.devcb.p_link_qual_cmpl_cb;
2408 tBTM_LINK_QUALITY_RESULT result;
2409 tACL_CONN* p_acl_cb = &btm_cb.acl_db[0];
2410
2411 BTM_TRACE_DEBUG("%s", __func__);
2412 alarm_cancel(btm_cb.devcb.read_link_quality_timer);
2413 btm_cb.devcb.p_link_qual_cmpl_cb = NULL;
2414
2415 /* If there was a registered callback, call it */
2416 if (p_cb) {
2417 STREAM_TO_UINT8(result.hci_status, p);
2418
2419 if (result.hci_status == HCI_SUCCESS) {
2420 uint16_t handle;
2421 result.status = BTM_SUCCESS;
2422
2423 STREAM_TO_UINT16(handle, p);
2424
2425 STREAM_TO_UINT8(result.link_quality, p);
2426 BTM_TRACE_DEBUG(
2427 "BTM Link Quality Complete: Link Quality %d, hci status 0x%02x",
2428 result.link_quality, result.hci_status);
2429
2430 /* Search through the list of active channels for the correct BD Addr */
2431 for (uint16_t index = 0; index < MAX_L2CAP_LINKS; index++, p_acl_cb++) {
2432 if ((p_acl_cb->in_use) && (handle == p_acl_cb->hci_handle)) {
2433 result.rem_bda = p_acl_cb->remote_addr;
2434 break;
2435 }
2436 }
2437 } else {
2438 result.status = BTM_ERR_PROCESSING;
2439 }
2440
2441 (*p_cb)(&result);
2442 }
2443 }
2444
2445 /*******************************************************************************
2446 *
2447 * Function btm_remove_acl
2448 *
2449 * Description This function is called to disconnect an ACL connection
2450 *
2451 * Returns BTM_SUCCESS if successfully initiated, otherwise
2452 * BTM_NO_RESOURCES.
2453 *
2454 ******************************************************************************/
btm_remove_acl(const RawAddress & bd_addr,tBT_TRANSPORT transport)2455 tBTM_STATUS btm_remove_acl(const RawAddress& bd_addr, tBT_TRANSPORT transport) {
2456 uint16_t hci_handle = BTM_GetHCIConnHandle(bd_addr, transport);
2457 tBTM_STATUS status = BTM_SUCCESS;
2458
2459 BTM_TRACE_DEBUG("btm_remove_acl");
2460 #if (BTM_DISC_DURING_RS == TRUE)
2461 tBTM_SEC_DEV_REC* p_dev_rec = btm_find_dev(bd_addr);
2462
2463 /* Role Switch is pending, postpone until completed */
2464 if (p_dev_rec && (p_dev_rec->rs_disc_pending == BTM_SEC_RS_PENDING)) {
2465 p_dev_rec->rs_disc_pending = BTM_SEC_DISC_PENDING;
2466 } else /* otherwise can disconnect right away */
2467 #endif
2468 {
2469 if (hci_handle != 0xFFFF && p_dev_rec &&
2470 p_dev_rec->sec_state != BTM_SEC_STATE_DISCONNECTING) {
2471 btsnd_hcic_disconnect(hci_handle, HCI_ERR_PEER_USER);
2472 } else {
2473 status = BTM_UNKNOWN_ADDR;
2474 }
2475 }
2476
2477 return status;
2478 }
2479
2480 /*******************************************************************************
2481 *
2482 * Function BTM_SetTraceLevel
2483 *
2484 * Description This function sets the trace level for BTM. If called with
2485 * a value of 0xFF, it simply returns the current trace level.
2486 *
2487 * Returns The new or current trace level
2488 *
2489 ******************************************************************************/
BTM_SetTraceLevel(uint8_t new_level)2490 uint8_t BTM_SetTraceLevel(uint8_t new_level) {
2491 BTM_TRACE_DEBUG("BTM_SetTraceLevel");
2492 if (new_level != 0xFF) btm_cb.trace_level = new_level;
2493
2494 return (btm_cb.trace_level);
2495 }
2496
2497 /*******************************************************************************
2498 *
2499 * Function btm_cont_rswitch
2500 *
2501 * Description This function is called to continue processing an active
2502 * role switch. It first disables encryption if enabled and
2503 * EPR is not supported
2504 *
2505 * Returns void
2506 *
2507 ******************************************************************************/
btm_cont_rswitch(tACL_CONN * p,tBTM_SEC_DEV_REC * p_dev_rec,uint8_t hci_status)2508 void btm_cont_rswitch(tACL_CONN* p, tBTM_SEC_DEV_REC* p_dev_rec,
2509 uint8_t hci_status) {
2510 BTM_TRACE_DEBUG("btm_cont_rswitch");
2511 /* Check to see if encryption needs to be turned off if pending
2512 change of link key or role switch */
2513 if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE) {
2514 /* Must turn off Encryption first if necessary */
2515 /* Some devices do not support switch or change of link key while encryption
2516 * is on */
2517 if (p_dev_rec != NULL &&
2518 ((p_dev_rec->sec_flags & BTM_SEC_ENCRYPTED) != 0) &&
2519 !BTM_EPR_AVAILABLE(p)) {
2520 btsnd_hcic_set_conn_encrypt(p->hci_handle, false);
2521 p->encrypt_state = BTM_ACL_ENCRYPT_STATE_ENCRYPT_OFF;
2522 if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE)
2523 p->switch_role_state = BTM_ACL_SWKEY_STATE_ENCRYPTION_OFF;
2524 } else /* Encryption not used or EPR supported, continue with switch
2525 and/or change of link key */
2526 {
2527 if (p->switch_role_state == BTM_ACL_SWKEY_STATE_MODE_CHANGE) {
2528 p->switch_role_state = BTM_ACL_SWKEY_STATE_IN_PROGRESS;
2529 #if (BTM_DISC_DURING_RS == TRUE)
2530 if (p_dev_rec) p_dev_rec->rs_disc_pending = BTM_SEC_RS_PENDING;
2531 #endif
2532 btsnd_hcic_switch_role(p->remote_addr, (uint8_t)!p->link_role);
2533 }
2534 }
2535 }
2536 }
2537
2538 /*******************************************************************************
2539 *
2540 * Function btm_acl_resubmit_page
2541 *
2542 * Description send pending page request
2543 *
2544 ******************************************************************************/
btm_acl_resubmit_page(void)2545 void btm_acl_resubmit_page(void) {
2546 tBTM_SEC_DEV_REC* p_dev_rec;
2547 BT_HDR* p_buf;
2548 uint8_t* pp;
2549 BTM_TRACE_DEBUG("btm_acl_resubmit_page");
2550 /* If there were other page request schedule can start the next one */
2551 p_buf = (BT_HDR*)fixed_queue_try_dequeue(btm_cb.page_queue);
2552 if (p_buf != NULL) {
2553 /* skip 3 (2 bytes opcode and 1 byte len) to get to the bd_addr
2554 * for both create_conn and rmt_name */
2555 pp = (uint8_t*)(p_buf + 1) + p_buf->offset + 3;
2556
2557 RawAddress bda;
2558 STREAM_TO_BDADDR(bda, pp);
2559
2560 p_dev_rec = btm_find_or_alloc_dev(bda);
2561
2562 btm_cb.connecting_bda = p_dev_rec->bd_addr;
2563 memcpy(btm_cb.connecting_dc, p_dev_rec->dev_class, DEV_CLASS_LEN);
2564
2565 btu_hcif_send_cmd(LOCAL_BR_EDR_CONTROLLER_ID, p_buf);
2566 } else {
2567 btm_cb.paging = false;
2568 }
2569 }
2570
2571 /*******************************************************************************
2572 *
2573 * Function btm_acl_reset_paging
2574 *
2575 * Description set paging to false and free the page queue - called at
2576 * hci_reset
2577 *
2578 ******************************************************************************/
btm_acl_reset_paging(void)2579 void btm_acl_reset_paging(void) {
2580 BT_HDR* p;
2581 BTM_TRACE_DEBUG("btm_acl_reset_paging");
2582 /* If we sent reset we are definitely not paging any more */
2583 while ((p = (BT_HDR*)fixed_queue_try_dequeue(btm_cb.page_queue)) != NULL)
2584 osi_free(p);
2585
2586 btm_cb.paging = false;
2587 }
2588
2589 /*******************************************************************************
2590 *
2591 * Function btm_acl_paging
2592 *
2593 * Description send a paging command or queue it in btm_cb
2594 *
2595 ******************************************************************************/
btm_acl_paging(BT_HDR * p,const RawAddress & bda)2596 void btm_acl_paging(BT_HDR* p, const RawAddress& bda) {
2597 tBTM_SEC_DEV_REC* p_dev_rec;
2598
2599 VLOG(2) << __func__ << ":" << btm_cb.discing << " , paging:" << btm_cb.paging
2600 << " BDA: " << bda;
2601
2602 if (btm_cb.discing) {
2603 btm_cb.paging = true;
2604 fixed_queue_enqueue(btm_cb.page_queue, p);
2605 } else {
2606 if (!BTM_ACL_IS_CONNECTED(bda)) {
2607 VLOG(1) << "connecting_bda: " << btm_cb.connecting_bda;
2608 if (btm_cb.paging && bda != btm_cb.connecting_bda) {
2609 fixed_queue_enqueue(btm_cb.page_queue, p);
2610 } else {
2611 p_dev_rec = btm_find_or_alloc_dev(bda);
2612 btm_cb.connecting_bda = p_dev_rec->bd_addr;
2613 memcpy(btm_cb.connecting_dc, p_dev_rec->dev_class, DEV_CLASS_LEN);
2614
2615 btu_hcif_send_cmd(LOCAL_BR_EDR_CONTROLLER_ID, p);
2616 }
2617
2618 btm_cb.paging = true;
2619 } else /* ACL is already up */
2620 {
2621 btu_hcif_send_cmd(LOCAL_BR_EDR_CONTROLLER_ID, p);
2622 }
2623 }
2624 }
2625
2626 /*******************************************************************************
2627 *
2628 * Function btm_acl_notif_conn_collision
2629 *
2630 * Description Send connection collision event to upper layer if registered
2631 *
2632 * Returns true if sent out to upper layer,
2633 * false if no one needs the notification.
2634 *
2635 ******************************************************************************/
btm_acl_notif_conn_collision(const RawAddress & bda)2636 bool btm_acl_notif_conn_collision(const RawAddress& bda) {
2637 /* Report possible collision to the upper layer. */
2638 if (btm_cb.p_bl_changed_cb) {
2639 VLOG(1) << __func__ << " RemBdAddr: " << bda;
2640
2641 tBTM_BL_EVENT_DATA evt_data;
2642 evt_data.event = BTM_BL_COLLISION_EVT;
2643 evt_data.conn.p_bda = &bda;
2644 evt_data.conn.transport = BT_TRANSPORT_BR_EDR;
2645 evt_data.conn.handle = BTM_INVALID_HCI_HANDLE;
2646 (*btm_cb.p_bl_changed_cb)(&evt_data);
2647 return true;
2648 } else {
2649 return false;
2650 }
2651 }
2652
2653 /*******************************************************************************
2654 *
2655 * Function btm_acl_chk_peer_pkt_type_support
2656 *
2657 * Description Check if peer supports requested packets
2658 *
2659 ******************************************************************************/
btm_acl_chk_peer_pkt_type_support(tACL_CONN * p,uint16_t * p_pkt_type)2660 void btm_acl_chk_peer_pkt_type_support(tACL_CONN* p, uint16_t* p_pkt_type) {
2661 /* 3 and 5 slot packets? */
2662 if (!HCI_3_SLOT_PACKETS_SUPPORTED(p->peer_lmp_feature_pages[0]))
2663 *p_pkt_type &= ~(BTM_ACL_PKT_TYPES_MASK_DH3 + BTM_ACL_PKT_TYPES_MASK_DM3);
2664
2665 if (!HCI_5_SLOT_PACKETS_SUPPORTED(p->peer_lmp_feature_pages[0]))
2666 *p_pkt_type &= ~(BTM_ACL_PKT_TYPES_MASK_DH5 + BTM_ACL_PKT_TYPES_MASK_DM5);
2667
2668 /* 2 and 3 MPS support? */
2669 if (!HCI_EDR_ACL_2MPS_SUPPORTED(p->peer_lmp_feature_pages[0]))
2670 /* Not supported. Add 'not_supported' mask for all 2MPS packet types */
2671 *p_pkt_type |=
2672 (BTM_ACL_PKT_TYPES_MASK_NO_2_DH1 + BTM_ACL_PKT_TYPES_MASK_NO_2_DH3 +
2673 BTM_ACL_PKT_TYPES_MASK_NO_2_DH5);
2674
2675 if (!HCI_EDR_ACL_3MPS_SUPPORTED(p->peer_lmp_feature_pages[0]))
2676 /* Not supported. Add 'not_supported' mask for all 3MPS packet types */
2677 *p_pkt_type |=
2678 (BTM_ACL_PKT_TYPES_MASK_NO_3_DH1 + BTM_ACL_PKT_TYPES_MASK_NO_3_DH3 +
2679 BTM_ACL_PKT_TYPES_MASK_NO_3_DH5);
2680
2681 /* EDR 3 and 5 slot support? */
2682 if (HCI_EDR_ACL_2MPS_SUPPORTED(p->peer_lmp_feature_pages[0]) ||
2683 HCI_EDR_ACL_3MPS_SUPPORTED(p->peer_lmp_feature_pages[0])) {
2684 if (!HCI_3_SLOT_EDR_ACL_SUPPORTED(p->peer_lmp_feature_pages[0]))
2685 /* Not supported. Add 'not_supported' mask for all 3-slot EDR packet types
2686 */
2687 *p_pkt_type |=
2688 (BTM_ACL_PKT_TYPES_MASK_NO_2_DH3 + BTM_ACL_PKT_TYPES_MASK_NO_3_DH3);
2689
2690 if (!HCI_5_SLOT_EDR_ACL_SUPPORTED(p->peer_lmp_feature_pages[0]))
2691 /* Not supported. Add 'not_supported' mask for all 5-slot EDR packet types
2692 */
2693 *p_pkt_type |=
2694 (BTM_ACL_PKT_TYPES_MASK_NO_2_DH5 + BTM_ACL_PKT_TYPES_MASK_NO_3_DH5);
2695 }
2696 }
2697