1 /******************************************************************************
2 *
3 * Copyright 2003-2012 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 * This file contains action functions for the audio gateway.
22 *
23 ******************************************************************************/
24
25 #include <cstring>
26
27 #include "bta_ag_api.h"
28 #include "bta_ag_int.h"
29 #include "bta_api.h"
30 #include "bta_dm_api.h"
31 #include "bta_sys.h"
32 #include "btif_config.h"
33 #include "l2c_api.h"
34 #include "osi/include/osi.h"
35 #include "port_api.h"
36 #include "utl.h"
37
38 /*****************************************************************************
39 * Constants
40 ****************************************************************************/
41
42 /* maximum length of data to read from RFCOMM */
43 #define BTA_AG_RFC_READ_MAX 512
44
45 /* maximum AT command length */
46 #define BTA_AG_CMD_MAX 512
47
48 const uint16_t bta_ag_uuid[BTA_AG_NUM_IDX] = {
49 UUID_SERVCLASS_HEADSET_AUDIO_GATEWAY, UUID_SERVCLASS_AG_HANDSFREE};
50
51 const uint8_t bta_ag_sec_id[BTA_AG_NUM_IDX] = {BTM_SEC_SERVICE_HEADSET_AG,
52 BTM_SEC_SERVICE_AG_HANDSFREE};
53
54 const tBTA_SERVICE_ID bta_ag_svc_id[BTA_AG_NUM_IDX] = {BTA_HSP_SERVICE_ID,
55 BTA_HFP_SERVICE_ID};
56
57 const tBTA_SERVICE_MASK bta_ag_svc_mask[BTA_AG_NUM_IDX] = {
58 BTA_HSP_SERVICE_MASK, BTA_HFP_SERVICE_MASK};
59
60 typedef void (*tBTA_AG_ATCMD_CBACK)(tBTA_AG_SCB* p_scb, uint16_t cmd,
61 uint8_t arg_type, char* p_arg, char* p_end,
62 int16_t int_arg);
63
64 const tBTA_AG_ATCMD_CBACK bta_ag_at_cback_tbl[BTA_AG_NUM_IDX] = {
65 bta_ag_at_hsp_cback, bta_ag_at_hfp_cback};
66
67 /*******************************************************************************
68 *
69 * Function bta_ag_cback_open
70 *
71 * Description Send open callback event to application.
72 *
73 *
74 * Returns void
75 *
76 ******************************************************************************/
bta_ag_cback_open(tBTA_AG_SCB * p_scb,const RawAddress & bd_addr,tBTA_AG_STATUS status)77 static void bta_ag_cback_open(tBTA_AG_SCB* p_scb, const RawAddress& bd_addr,
78 tBTA_AG_STATUS status) {
79 tBTA_AG_OPEN open = {};
80
81 /* call app callback with open event */
82 open.hdr.handle = bta_ag_scb_to_idx(p_scb);
83 open.hdr.app_id = p_scb->app_id;
84 open.status = status;
85 open.service_id = bta_ag_svc_id[p_scb->conn_service];
86 open.bd_addr = bd_addr;
87
88 (*bta_ag_cb.p_cback)(BTA_AG_OPEN_EVT, (tBTA_AG*)&open);
89 }
90
91 /*******************************************************************************
92 *
93 * Function bta_ag_register
94 *
95 * Description This function initializes values of the AG cb and sets up
96 * the SDP record for the services.
97 *
98 *
99 * Returns void
100 *
101 ******************************************************************************/
bta_ag_register(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)102 void bta_ag_register(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
103 /* initialize control block */
104 p_scb->reg_services = data.api_register.services;
105 p_scb->serv_sec_mask = data.api_register.sec_mask;
106 p_scb->features = data.api_register.features;
107 p_scb->app_id = data.api_register.app_id;
108
109 /* create SDP records */
110 bta_ag_create_records(p_scb, data);
111
112 /* start RFCOMM servers */
113 bta_ag_start_servers(p_scb, p_scb->reg_services);
114
115 /* call app callback with register event */
116 tBTA_AG_REGISTER reg = {};
117 reg.hdr.handle = bta_ag_scb_to_idx(p_scb);
118 reg.hdr.app_id = p_scb->app_id;
119 reg.status = BTA_AG_SUCCESS;
120 (*bta_ag_cb.p_cback)(BTA_AG_REGISTER_EVT, (tBTA_AG*)®);
121 }
122
123 /*******************************************************************************
124 *
125 * Function bta_ag_deregister
126 *
127 * Description This function removes the sdp records, closes the RFCOMM
128 * servers, and deallocates the service control block.
129 *
130 *
131 * Returns void
132 *
133 ******************************************************************************/
bta_ag_deregister(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)134 void bta_ag_deregister(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
135 /* set dealloc */
136 p_scb->dealloc = true;
137
138 /* remove sdp records */
139 bta_ag_del_records(p_scb);
140
141 /* remove rfcomm servers */
142 bta_ag_close_servers(p_scb, p_scb->reg_services);
143
144 /* dealloc */
145 bta_ag_scb_dealloc(p_scb);
146 }
147
148 /*******************************************************************************
149 *
150 * Function bta_ag_start_dereg
151 *
152 * Description Start a deregister event.
153 *
154 *
155 * Returns void
156 *
157 ******************************************************************************/
bta_ag_start_dereg(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)158 void bta_ag_start_dereg(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
159 /* set dealloc */
160 p_scb->dealloc = true;
161
162 /* remove sdp records */
163 bta_ag_del_records(p_scb);
164 }
165
166 /*******************************************************************************
167 *
168 * Function bta_ag_start_open
169 *
170 * Description This starts an AG open.
171 *
172 *
173 * Returns void
174 *
175 ******************************************************************************/
bta_ag_start_open(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)176 void bta_ag_start_open(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
177 p_scb->peer_addr = data.api_open.bd_addr;
178 p_scb->cli_sec_mask = data.api_open.sec_mask;
179 p_scb->open_services = p_scb->reg_services;
180
181 /* Check if RFCOMM has any incoming connection to avoid collision. */
182 RawAddress pending_bd_addr = RawAddress::kEmpty;
183 if (PORT_IsOpening(&pending_bd_addr)) {
184 /* Let the incoming connection goes through. */
185 /* Issue collision for this scb for now. */
186 /* We will decide what to do when we find incoming connetion later. */
187 bta_ag_collision_cback(0, BTA_ID_AG, 0, p_scb->peer_addr);
188 return;
189 }
190
191 /* close servers */
192 bta_ag_close_servers(p_scb, p_scb->reg_services);
193
194 /* set role */
195 p_scb->role = BTA_AG_INT;
196
197 /* do service search */
198 bta_ag_do_disc(p_scb, p_scb->open_services);
199 }
200
201 /*******************************************************************************
202 *
203 * Function bta_ag_disc_int_res
204 *
205 * Description This function handles a discovery result when initiator.
206 *
207 *
208 * Returns void
209 *
210 ******************************************************************************/
bta_ag_disc_int_res(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)211 void bta_ag_disc_int_res(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
212 uint16_t event = BTA_AG_DISC_FAIL_EVT;
213
214 APPL_TRACE_DEBUG("bta_ag_disc_int_res: Status: %d", data.disc_result.status);
215
216 /* if found service */
217 if (data.disc_result.status == SDP_SUCCESS ||
218 data.disc_result.status == SDP_DB_FULL) {
219 /* get attributes */
220 if (bta_ag_sdp_find_attr(p_scb, p_scb->open_services)) {
221 /* set connected service */
222 p_scb->conn_service = bta_ag_service_to_idx(p_scb->open_services);
223
224 /* send ourselves sdp ok event */
225 event = BTA_AG_DISC_OK_EVT;
226 }
227 }
228
229 /* free discovery db */
230 bta_ag_free_db(p_scb, data);
231
232 /* if service not found check if we should search for other service */
233 if ((event == BTA_AG_DISC_FAIL_EVT) &&
234 (data.disc_result.status == SDP_SUCCESS ||
235 data.disc_result.status == SDP_DB_FULL ||
236 data.disc_result.status == SDP_NO_RECS_MATCH)) {
237 if ((p_scb->open_services & BTA_HFP_SERVICE_MASK) &&
238 (p_scb->open_services & BTA_HSP_SERVICE_MASK)) {
239 /* search for HSP */
240 p_scb->open_services &= ~BTA_HFP_SERVICE_MASK;
241 bta_ag_do_disc(p_scb, p_scb->open_services);
242 } else if ((p_scb->open_services & BTA_HSP_SERVICE_MASK) &&
243 (p_scb->hsp_version == HSP_VERSION_1_2)) {
244 /* search for UUID_SERVCLASS_HEADSET instead */
245 p_scb->hsp_version = HSP_VERSION_1_0;
246 bta_ag_do_disc(p_scb, p_scb->open_services);
247 } else {
248 /* send ourselves sdp ok/fail event */
249 bta_ag_sm_execute(p_scb, event, data);
250 }
251 } else {
252 /* send ourselves sdp ok/fail event */
253 bta_ag_sm_execute(p_scb, event, data);
254 }
255 }
256
257 /*******************************************************************************
258 *
259 * Function bta_ag_disc_acp_res
260 *
261 * Description This function handles a discovery result when acceptor.
262 *
263 *
264 * Returns void
265 *
266 ******************************************************************************/
bta_ag_disc_acp_res(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)267 void bta_ag_disc_acp_res(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
268 /* if found service */
269 if (data.disc_result.status == SDP_SUCCESS ||
270 data.disc_result.status == SDP_DB_FULL) {
271 /* get attributes */
272 bta_ag_sdp_find_attr(p_scb, bta_ag_svc_mask[p_scb->conn_service]);
273 }
274
275 /* free discovery db */
276 bta_ag_free_db(p_scb, data);
277 }
278
279 /*******************************************************************************
280 *
281 * Function bta_ag_disc_fail
282 *
283 * Description This function handles a discovery failure.
284 *
285 *
286 * Returns void
287 *
288 ******************************************************************************/
bta_ag_disc_fail(tBTA_AG_SCB * p_scb,UNUSED_ATTR const tBTA_AG_DATA & data)289 void bta_ag_disc_fail(tBTA_AG_SCB* p_scb,
290 UNUSED_ATTR const tBTA_AG_DATA& data) {
291 /* reopen registered servers */
292 bta_ag_start_servers(p_scb, p_scb->reg_services);
293
294 /* reinitialize stuff */
295
296 /* clear the remote BD address */
297 RawAddress peer_addr = p_scb->peer_addr;
298 p_scb->peer_addr = RawAddress::kEmpty;
299
300 /* call open cback w. failure */
301 bta_ag_cback_open(p_scb, peer_addr, BTA_AG_FAIL_SDP);
302 }
303
304 /*******************************************************************************
305 *
306 * Function bta_ag_open_fail
307 *
308 * Description open connection failed.
309 *
310 *
311 * Returns void
312 *
313 ******************************************************************************/
bta_ag_open_fail(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)314 void bta_ag_open_fail(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
315 /* call open cback w. failure */
316 bta_ag_cback_open(p_scb, data.api_open.bd_addr, BTA_AG_FAIL_RESOURCES);
317 }
318
319 /*******************************************************************************
320 *
321 * Function bta_ag_rfc_fail
322 *
323 * Description RFCOMM connection failed.
324 *
325 *
326 * Returns void
327 *
328 ******************************************************************************/
bta_ag_rfc_fail(tBTA_AG_SCB * p_scb,UNUSED_ATTR const tBTA_AG_DATA & data)329 void bta_ag_rfc_fail(tBTA_AG_SCB* p_scb, UNUSED_ATTR const tBTA_AG_DATA& data) {
330 RawAddress peer_addr = p_scb->peer_addr;
331 /* reinitialize stuff */
332 p_scb->conn_handle = 0;
333 p_scb->conn_service = 0;
334 p_scb->peer_features = 0;
335 p_scb->peer_codecs = BTA_AG_CODEC_CVSD;
336 p_scb->sco_codec = BTA_AG_CODEC_CVSD;
337 p_scb->role = 0;
338 p_scb->svc_conn = false;
339 p_scb->hsp_version = HSP_VERSION_1_2;
340 /*Clear the BD address*/
341 p_scb->peer_addr = RawAddress::kEmpty;
342
343 /* reopen registered servers */
344 bta_ag_start_servers(p_scb, p_scb->reg_services);
345
346 /* call open cback w. failure */
347 bta_ag_cback_open(p_scb, peer_addr, BTA_AG_FAIL_RFCOMM);
348 }
349
350 /*******************************************************************************
351 *
352 * Function bta_ag_rfc_close
353 *
354 * Description RFCOMM connection closed.
355 *
356 *
357 * Returns void
358 *
359 ******************************************************************************/
bta_ag_rfc_close(tBTA_AG_SCB * p_scb,UNUSED_ATTR const tBTA_AG_DATA & data)360 void bta_ag_rfc_close(tBTA_AG_SCB* p_scb,
361 UNUSED_ATTR const tBTA_AG_DATA& data) {
362 tBTA_AG_CLOSE close = {};
363 tBTA_SERVICE_MASK services;
364 int i, num_active_conn = 0;
365
366 /* reinitialize stuff */
367 p_scb->conn_service = 0;
368 p_scb->peer_features = 0;
369 p_scb->peer_codecs = BTA_AG_CODEC_CVSD;
370 p_scb->sco_codec = BTA_AG_CODEC_CVSD;
371 /* Clear these flags upon SLC teardown */
372 p_scb->codec_updated = false;
373 p_scb->codec_fallback = false;
374 p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
375 p_scb->role = 0;
376 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
377 p_scb->svc_conn = false;
378 p_scb->hsp_version = HSP_VERSION_1_2;
379 bta_ag_at_reinit(&p_scb->at_cb);
380
381 for (auto& peer_hf_indicator : p_scb->peer_hf_indicators) {
382 peer_hf_indicator = {};
383 }
384 for (auto& local_hf_indicator : p_scb->local_hf_indicators) {
385 local_hf_indicator = {};
386 }
387
388 /* stop timers */
389 alarm_cancel(p_scb->ring_timer);
390 alarm_cancel(p_scb->codec_negotiation_timer);
391
392 close.hdr.handle = bta_ag_scb_to_idx(p_scb);
393 close.hdr.app_id = p_scb->app_id;
394 close.bd_addr = p_scb->peer_addr;
395
396 bta_sys_conn_close(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
397
398 if (bta_ag_get_active_device() == p_scb->peer_addr) {
399 bta_clear_active_device();
400 }
401
402 /* call close cback */
403 (*bta_ag_cb.p_cback)(BTA_AG_CLOSE_EVT, (tBTA_AG*)&close);
404
405 /* if not deregistering (deallocating) reopen registered servers */
406 if (!p_scb->dealloc) {
407 /* Clear peer bd_addr so instance can be reused */
408 p_scb->peer_addr = RawAddress::kEmpty;
409
410 /* start only unopened server */
411 services = p_scb->reg_services;
412 for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++) {
413 if (p_scb->serv_handle[i])
414 services &= ~((tBTA_SERVICE_MASK)1 << (BTA_HSP_SERVICE_ID + i));
415 }
416 bta_ag_start_servers(p_scb, services);
417
418 p_scb->conn_handle = 0;
419
420 /* Make sure SCO state is BTA_AG_SCO_SHUTDOWN_ST */
421 bta_ag_sco_shutdown(p_scb, tBTA_AG_DATA::kEmpty);
422
423 /* Check if all the SLCs are down */
424 for (i = 0; i < BTA_AG_MAX_NUM_CLIENTS; i++) {
425 if (bta_ag_cb.scb[i].in_use && bta_ag_cb.scb[i].svc_conn)
426 num_active_conn++;
427 }
428
429 if (!num_active_conn) {
430 bta_sys_sco_unuse(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
431 }
432
433 }
434 /* else close port and deallocate scb */
435 else {
436 RFCOMM_RemoveServer(p_scb->conn_handle);
437 bta_ag_scb_dealloc(p_scb);
438 }
439 }
440
441 /*******************************************************************************
442 *
443 * Function bta_ag_rfc_open
444 *
445 * Description Handle RFCOMM channel open.
446 *
447 *
448 * Returns void
449 *
450 ******************************************************************************/
bta_ag_rfc_open(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)451 void bta_ag_rfc_open(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
452 /* initialize AT feature variables */
453 p_scb->clip_enabled = false;
454 p_scb->ccwa_enabled = false;
455 p_scb->cmer_enabled = false;
456 p_scb->cmee_enabled = false;
457 p_scb->inband_enabled =
458 ((p_scb->features & BTA_AG_FEAT_INBAND) == BTA_AG_FEAT_INBAND);
459 if (p_scb->conn_service == BTA_AG_HFP) {
460 size_t version_value_size = sizeof(p_scb->peer_version);
461 if (!btif_config_get_bin(
462 p_scb->peer_addr.ToString(), HFP_VERSION_CONFIG_KEY,
463 (uint8_t*)&p_scb->peer_version, &version_value_size)) {
464 APPL_TRACE_WARNING("%s: Failed read cached peer HFP version for %s",
465 __func__, p_scb->peer_addr.ToString().c_str());
466 p_scb->peer_version = HFP_HSP_VERSION_UNKNOWN;
467 }
468 size_t sdp_features_size = sizeof(p_scb->peer_sdp_features);
469 if (btif_config_get_bin(
470 p_scb->peer_addr.ToString(), HFP_SDP_FEATURES_CONFIG_KEY,
471 (uint8_t*)&p_scb->peer_sdp_features, &sdp_features_size)) {
472 bool sdp_wbs_support = p_scb->peer_sdp_features & BTA_AG_FEAT_WBS_SUPPORT;
473 if (!p_scb->received_at_bac && sdp_wbs_support) {
474 p_scb->codec_updated = true;
475 p_scb->peer_codecs = BTA_AG_CODEC_CVSD & BTA_AG_CODEC_MSBC;
476 p_scb->sco_codec = UUID_CODEC_MSBC;
477 }
478 } else {
479 APPL_TRACE_WARNING("%s: Failed read cached peer HFP SDP features for %s",
480 __func__, p_scb->peer_addr.ToString().c_str());
481 }
482 }
483
484 /* set up AT command interpreter */
485 p_scb->at_cb.p_at_tbl = bta_ag_at_tbl[p_scb->conn_service];
486 p_scb->at_cb.p_cmd_cback = bta_ag_at_cback_tbl[p_scb->conn_service];
487 p_scb->at_cb.p_err_cback = bta_ag_at_err_cback;
488 p_scb->at_cb.p_user = p_scb;
489 p_scb->at_cb.cmd_max_len = BTA_AG_CMD_MAX;
490 bta_ag_at_init(&p_scb->at_cb);
491
492 bta_sys_conn_open(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
493
494 bta_ag_cback_open(p_scb, p_scb->peer_addr, BTA_AG_SUCCESS);
495
496 if (p_scb->conn_service == BTA_AG_HFP) {
497 /* if hfp start timer for service level conn */
498 bta_sys_start_timer(p_scb->ring_timer, p_bta_ag_cfg->conn_tout,
499 BTA_AG_SVC_TIMEOUT_EVT, bta_ag_scb_to_idx(p_scb));
500 } else {
501 /* else service level conn is open */
502 bta_ag_svc_conn_open(p_scb, data);
503 }
504 }
505
506 /*******************************************************************************
507 *
508 * Function bta_ag_rfc_acp_open
509 *
510 * Description Handle RFCOMM channel open when accepting connection.
511 *
512 *
513 * Returns void
514 *
515 ******************************************************************************/
bta_ag_rfc_acp_open(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)516 void bta_ag_rfc_acp_open(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
517 APPL_TRACE_DEBUG("%s: serv_handle0 = %d serv_handle = %d", __func__,
518 p_scb->serv_handle[0], p_scb->serv_handle[1]);
519 /* set role */
520 p_scb->role = BTA_AG_ACP;
521
522 /* get bd addr of peer */
523 uint16_t lcid = 0;
524 RawAddress dev_addr = RawAddress::kEmpty;
525 int status = PORT_CheckConnection(data.rfc.port_handle, &dev_addr, &lcid);
526 if (status != PORT_SUCCESS) {
527 LOG(ERROR) << __func__ << ", PORT_CheckConnection returned " << status;
528 return;
529 }
530
531 /* Collision Handling */
532 for (tBTA_AG_SCB& ag_scb : bta_ag_cb.scb) {
533 // Cancel any pending collision timers
534 if (ag_scb.in_use && alarm_is_scheduled(ag_scb.collision_timer)) {
535 VLOG(1) << __func__ << ": cancel collision alarm for "
536 << ag_scb.peer_addr;
537 alarm_cancel(ag_scb.collision_timer);
538 if (dev_addr != ag_scb.peer_addr && p_scb != &ag_scb) {
539 // Resume outgoing connection if incoming is not on the same device
540 bta_ag_resume_open(&ag_scb);
541 }
542 }
543 if (dev_addr == ag_scb.peer_addr && p_scb != &ag_scb) {
544 VLOG(1) << __func__ << ": fail outgoing connection before accepting "
545 << ag_scb.peer_addr;
546 // Fail the outgoing connection to clean up any upper layer states
547 bta_ag_rfc_fail(&ag_scb, tBTA_AG_DATA::kEmpty);
548 // If client port is opened, close it
549 if (ag_scb.conn_handle > 0) {
550 status = RFCOMM_RemoveConnection(ag_scb.conn_handle);
551 if (status != PORT_SUCCESS) {
552 LOG(WARNING) << __func__ << ": RFCOMM_RemoveConnection failed for "
553 << dev_addr << ", handle "
554 << std::to_string(ag_scb.conn_handle) << ", error "
555 << status;
556 }
557 }
558 }
559 VLOG(1) << __func__ << ": dev_addr=" << dev_addr
560 << ", peer_addr=" << ag_scb.peer_addr
561 << ", in_use=" << ag_scb.in_use
562 << ", index=" << bta_ag_scb_to_idx(p_scb);
563 }
564
565 p_scb->peer_addr = dev_addr;
566
567 /* determine connected service from port handle */
568 for (uint8_t i = 0; i < BTA_AG_NUM_IDX; i++) {
569 APPL_TRACE_DEBUG(
570 "bta_ag_rfc_acp_open: i = %d serv_handle = %d port_handle = %d", i,
571 p_scb->serv_handle[i], data.rfc.port_handle);
572
573 if (p_scb->serv_handle[i] == data.rfc.port_handle) {
574 p_scb->conn_service = i;
575 p_scb->conn_handle = data.rfc.port_handle;
576 break;
577 }
578 }
579
580 APPL_TRACE_DEBUG("bta_ag_rfc_acp_open: conn_service = %d conn_handle = %d",
581 p_scb->conn_service, p_scb->conn_handle);
582
583 /* close any unopened server */
584 bta_ag_close_servers(
585 p_scb, (p_scb->reg_services & ~bta_ag_svc_mask[p_scb->conn_service]));
586
587 /* do service discovery to get features */
588 bta_ag_do_disc(p_scb, bta_ag_svc_mask[p_scb->conn_service]);
589
590 /* continue with common open processing */
591 bta_ag_rfc_open(p_scb, data);
592 }
593
594 /*******************************************************************************
595 *
596 * Function bta_ag_rfc_data
597 *
598 * Description Read and process data from RFCOMM.
599 *
600 *
601 * Returns void
602 *
603 ******************************************************************************/
bta_ag_rfc_data(tBTA_AG_SCB * p_scb,UNUSED_ATTR const tBTA_AG_DATA & data)604 void bta_ag_rfc_data(tBTA_AG_SCB* p_scb, UNUSED_ATTR const tBTA_AG_DATA& data) {
605 uint16_t len;
606 char buf[BTA_AG_RFC_READ_MAX] = "";
607
608 APPL_TRACE_DEBUG("%s", __func__);
609
610 /* do the following */
611 for (;;) {
612 /* read data from rfcomm; if bad status, we're done */
613 if (PORT_ReadData(p_scb->conn_handle, buf, BTA_AG_RFC_READ_MAX, &len) !=
614 PORT_SUCCESS) {
615 LOG(ERROR) << __func__ << ": failed to read data " << p_scb->peer_addr;
616 break;
617 }
618
619 /* if no data, we're done */
620 if (len == 0) {
621 LOG(WARNING) << __func__ << ": no data for " << p_scb->peer_addr;
622 break;
623 }
624
625 /* run AT command interpreter on data */
626 bta_sys_busy(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
627 bta_ag_at_parse(&p_scb->at_cb, buf, len);
628 if ((p_scb->sco_idx != BTM_INVALID_SCO_INDEX) &&
629 bta_ag_sco_is_open(p_scb)) {
630 APPL_TRACE_DEBUG("%s change link policy for SCO", __func__);
631 bta_sys_sco_open(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
632 } else {
633 bta_sys_idle(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
634 }
635
636 /* no more data to read, we're done */
637 if (len < BTA_AG_RFC_READ_MAX) {
638 break;
639 }
640 }
641 }
642
643 /*******************************************************************************
644 *
645 * Function bta_ag_start_close
646 *
647 * Description Start the process of closing SCO and RFCOMM connection.
648 *
649 *
650 * Returns void
651 *
652 ******************************************************************************/
bta_ag_start_close(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)653 void bta_ag_start_close(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
654 /* Take the link out of sniff and set L2C idle time to 0 */
655 bta_dm_pm_active(p_scb->peer_addr);
656 L2CA_SetIdleTimeoutByBdAddr(p_scb->peer_addr, 0, BT_TRANSPORT_BR_EDR);
657
658 /* if SCO is open close SCO and wait on RFCOMM close */
659 if (bta_ag_sco_is_open(p_scb)) {
660 p_scb->post_sco = BTA_AG_POST_SCO_CLOSE_RFC;
661 } else {
662 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
663 bta_ag_rfc_do_close(p_scb, data);
664 }
665
666 /* always do SCO shutdown to handle all SCO corner cases */
667 bta_ag_sco_shutdown(p_scb, data);
668 }
669
670 /*******************************************************************************
671 *
672 * Function bta_ag_post_sco_open
673 *
674 * Description Perform post-SCO open action, if any
675 *
676 *
677 * Returns void
678 *
679 ******************************************************************************/
bta_ag_post_sco_open(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)680 void bta_ag_post_sco_open(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
681 switch (p_scb->post_sco) {
682 case BTA_AG_POST_SCO_RING:
683 bta_ag_send_ring(p_scb, data);
684 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
685 break;
686
687 case BTA_AG_POST_SCO_CALL_CONN:
688 bta_ag_send_call_inds(p_scb, BTA_AG_IN_CALL_CONN_RES);
689 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
690 break;
691
692 default:
693 break;
694 }
695 }
696
697 /*******************************************************************************
698 *
699 * Function bta_ag_post_sco_close
700 *
701 * Description Perform post-SCO close action, if any
702 *
703 *
704 * Returns void
705 *
706 ******************************************************************************/
bta_ag_post_sco_close(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)707 void bta_ag_post_sco_close(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
708 switch (p_scb->post_sco) {
709 case BTA_AG_POST_SCO_CLOSE_RFC:
710 bta_ag_rfc_do_close(p_scb, data);
711 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
712 break;
713
714 case BTA_AG_POST_SCO_CALL_CONN:
715 bta_ag_send_call_inds(p_scb, BTA_AG_IN_CALL_CONN_RES);
716 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
717 break;
718
719 case BTA_AG_POST_SCO_CALL_ORIG:
720 bta_ag_send_call_inds(p_scb, BTA_AG_OUT_CALL_ORIG_RES);
721 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
722 break;
723
724 case BTA_AG_POST_SCO_CALL_END:
725 bta_ag_send_call_inds(p_scb, BTA_AG_END_CALL_RES);
726 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
727 break;
728
729 case BTA_AG_POST_SCO_CALL_END_INCALL:
730 bta_ag_send_call_inds(p_scb, BTA_AG_END_CALL_RES);
731
732 /* Sending callsetup IND and Ring were defered to after SCO close. */
733 bta_ag_send_call_inds(p_scb, BTA_AG_IN_CALL_RES);
734
735 if (bta_ag_inband_enabled(p_scb) &&
736 !(p_scb->features & BTA_AG_FEAT_NOSCO)) {
737 p_scb->post_sco = BTA_AG_POST_SCO_RING;
738 bta_ag_sco_open(p_scb, data);
739 } else {
740 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
741 bta_ag_send_ring(p_scb, data);
742 }
743 break;
744
745 default:
746 break;
747 }
748 }
749
750 /*******************************************************************************
751 *
752 * Function bta_ag_svc_conn_open
753 *
754 * Description Service level connection opened
755 *
756 *
757 * Returns void
758 *
759 ******************************************************************************/
bta_ag_svc_conn_open(tBTA_AG_SCB * p_scb,UNUSED_ATTR const tBTA_AG_DATA & data)760 void bta_ag_svc_conn_open(tBTA_AG_SCB* p_scb,
761 UNUSED_ATTR const tBTA_AG_DATA& data) {
762 tBTA_AG_CONN evt = {};
763
764 if (!p_scb->svc_conn) {
765 /* set state variable */
766 p_scb->svc_conn = true;
767
768 /* Clear AT+BIA mask from previous SLC if any. */
769 p_scb->bia_masked_out = 0;
770
771 alarm_cancel(p_scb->ring_timer);
772
773 /* call callback */
774 evt.hdr.handle = bta_ag_scb_to_idx(p_scb);
775 evt.hdr.app_id = p_scb->app_id;
776 evt.peer_feat = p_scb->peer_features;
777 evt.bd_addr = p_scb->peer_addr;
778 evt.peer_codec = p_scb->peer_codecs;
779
780 if ((p_scb->call_ind != BTA_AG_CALL_INACTIVE) ||
781 (p_scb->callsetup_ind != BTA_AG_CALLSETUP_NONE)) {
782 bta_sys_sco_use(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
783 }
784 if (bta_ag_get_active_device().IsEmpty()) {
785 bta_ag_api_set_active_device(p_scb->peer_addr);
786 }
787 (*bta_ag_cb.p_cback)(BTA_AG_CONN_EVT, (tBTA_AG*)&evt);
788 }
789 }
790
791 /*******************************************************************************
792 *
793 * Function bta_ag_setcodec
794 *
795 * Description Handle API SetCodec
796 *
797 *
798 * Returns void
799 *
800 ******************************************************************************/
bta_ag_setcodec(tBTA_AG_SCB * p_scb,const tBTA_AG_DATA & data)801 void bta_ag_setcodec(tBTA_AG_SCB* p_scb, const tBTA_AG_DATA& data) {
802 tBTA_AG_PEER_CODEC codec_type = data.api_setcodec.codec;
803 tBTA_AG_VAL val = {};
804 val.hdr.handle = bta_ag_scb_to_idx(p_scb);
805
806 /* Check if the requested codec type is valid */
807 if ((codec_type != BTA_AG_CODEC_NONE) && (codec_type != BTA_AG_CODEC_CVSD) &&
808 (codec_type != BTA_AG_CODEC_MSBC)) {
809 val.num = codec_type;
810 val.hdr.status = BTA_AG_FAIL_RESOURCES;
811 APPL_TRACE_ERROR("bta_ag_setcodec error: unsupported codec type %d",
812 codec_type);
813 (*bta_ag_cb.p_cback)(BTA_AG_WBS_EVT, (tBTA_AG*)&val);
814 return;
815 }
816
817 if ((p_scb->peer_codecs & codec_type) || (codec_type == BTA_AG_CODEC_NONE) ||
818 (codec_type == BTA_AG_CODEC_CVSD)) {
819 p_scb->sco_codec = codec_type;
820 p_scb->codec_updated = true;
821 val.num = codec_type;
822 val.hdr.status = BTA_AG_SUCCESS;
823 APPL_TRACE_DEBUG("bta_ag_setcodec: Updated codec type %d", codec_type);
824 } else {
825 val.num = codec_type;
826 val.hdr.status = BTA_AG_FAIL_RESOURCES;
827 APPL_TRACE_ERROR("bta_ag_setcodec error: unsupported codec type %d",
828 codec_type);
829 }
830
831 (*bta_ag_cb.p_cback)(BTA_AG_WBS_EVT, (tBTA_AG*)&val);
832 }
833
bta_ag_collision_timer_cback(void * data)834 static void bta_ag_collision_timer_cback(void* data) {
835 if (data == nullptr) {
836 LOG(ERROR) << __func__ << ": data should never be null in a timer callback";
837 return;
838 }
839 /* If the peer haven't opened AG connection */
840 /* we will restart opening process. */
841 bta_ag_resume_open(static_cast<tBTA_AG_SCB*>(data));
842 }
843
bta_ag_handle_collision(tBTA_AG_SCB * p_scb,UNUSED_ATTR const tBTA_AG_DATA & data)844 void bta_ag_handle_collision(tBTA_AG_SCB* p_scb,
845 UNUSED_ATTR const tBTA_AG_DATA& data) {
846 /* Cancel SDP if it had been started. */
847 if (p_scb->p_disc_db) {
848 SDP_CancelServiceSearch(p_scb->p_disc_db);
849 bta_ag_free_db(p_scb, tBTA_AG_DATA::kEmpty);
850 }
851
852 /* reopen registered servers */
853 /* Collision may be detected before or after we close servers. */
854 if (bta_ag_is_server_closed(p_scb)) {
855 bta_ag_start_servers(p_scb, p_scb->reg_services);
856 }
857
858 /* Start timer to han */
859 alarm_set_on_mloop(p_scb->collision_timer, BTA_AG_COLLISION_TIMEOUT_MS,
860 bta_ag_collision_timer_cback, p_scb);
861 }
862