1 /******************************************************************************
2  *
3  *  Copyright (C) 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 #include <string.h>
25 #include "bta_ag_int.h"
26 #include "bta/bta_sys.h"
27 #include "bta/bta_ag_api.h"
28 #include "bta/bta_ag_co.h"
29 #include "stack/port_api.h"
30 #include "stack/l2c_api.h"
31 #include "bta_dm_int.h"
32 #include "bta/bta_sdp_api.h"
33 #include "bta/utl.h"
34 #include "common/bt_trace.h"
35 #include "osi/allocator.h"
36 
37 #if (BTA_AG_INCLUDED == TRUE)
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 bta_ag_uuid[BTA_AG_NUM_IDX] =
49 {
50     UUID_SERVCLASS_HEADSET_AUDIO_GATEWAY,
51     UUID_SERVCLASS_AG_HANDSFREE
52 };
53 
54 const UINT8 bta_ag_sec_id[BTA_AG_NUM_IDX] =
55 {
56     BTM_SEC_SERVICE_HEADSET_AG,
57     BTM_SEC_SERVICE_AG_HANDSFREE
58 };
59 
60 const tBTA_SERVICE_ID bta_ag_svc_id[BTA_AG_NUM_IDX] =
61 {
62     BTA_HSP_SERVICE_ID,
63     BTA_HFP_SERVICE_ID
64 };
65 
66 const tBTA_SERVICE_MASK bta_ag_svc_mask[BTA_AG_NUM_IDX] =
67 {
68     BTA_HSP_SERVICE_MASK,
69     BTA_HFP_SERVICE_MASK
70 };
71 
72 typedef void (*tBTA_AG_ATCMD_CBACK)(tBTA_AG_SCB *p_scb, UINT16 cmd, UINT8 arg_type,
73                                     char *p_arg, INT16 int_arg);
74 
75 const tBTA_AG_ATCMD_CBACK bta_ag_at_cback_tbl[BTA_AG_NUM_IDX] =
76 {
77     bta_ag_at_hsp_cback,
78     bta_ag_at_hfp_cback
79 };
80 
81 /*******************************************************************************
82 **
83 ** Function         bta_ag_cback_open
84 **
85 ** Description      Send open callback event to application.
86 **
87 **
88 ** Returns          void
89 **
90 *******************************************************************************/
bta_ag_cback_open(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data,tBTA_AG_STATUS status)91 static void bta_ag_cback_open(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data, tBTA_AG_STATUS status)
92 {
93     tBTA_AG_OPEN    open;
94     /* call app callback with open event */
95     open.hdr.handle = bta_ag_scb_to_idx(p_scb);
96     open.hdr.app_id = p_scb->app_id;
97     open.status = status;
98     open.service_id = bta_ag_svc_id[p_scb->conn_service];
99     if (p_data) {
100         /* if p_data is provided then we need to pick the bd address from the open api structure */
101         bdcpy(open.bd_addr, p_data->api_open.bd_addr);
102     } else {
103         bdcpy(open.bd_addr, p_scb->peer_addr);
104     }
105     (*bta_ag_cb.p_cback)(BTA_AG_OPEN_EVT, (tBTA_AG *) &open);
106 }
107 
108 /*******************************************************************************
109 **
110 ** Function         bta_ag_register
111 **
112 ** Description      This function initializes values of the AG cb and sets up
113 **                  the SDP record for the services.
114 **
115 **
116 ** Returns          void
117 **
118 *******************************************************************************/
bta_ag_register(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)119 void bta_ag_register(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
120 {
121     tBTA_AG_REGISTER reg;
122     /* initialize control block */
123     p_scb->reg_services = p_data->api_register.services;
124     p_scb->serv_sec_mask = p_data->api_register.sec_mask;
125     p_scb->features = p_data->api_register.features;
126     p_scb->app_id = p_data->api_register.app_id;
127     /* create SDP records */
128     bta_ag_create_records(p_scb, p_data);
129     /* start RFCOMM servers */
130     bta_ag_start_servers(p_scb, p_scb->reg_services);
131     /* call app callback with register event */
132     reg.hdr.handle = bta_ag_scb_to_idx(p_scb);
133     reg.hdr.app_id = p_scb->app_id;
134     reg.status = BTA_AG_SUCCESS;
135     (*bta_ag_cb.p_cback)(BTA_AG_REGISTER_EVT, (tBTA_AG *) &reg);
136 }
137 
138 /*******************************************************************************
139 **
140 ** Function         bta_ag_deregister
141 **
142 ** Description      This function removes the sdp records, closes the RFCOMM
143 **                  servers, and deallocates the service control block.
144 **
145 **
146 ** Returns          void
147 **
148 *******************************************************************************/
bta_ag_deregister(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)149 void bta_ag_deregister(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
150 {
151     /* set dealloc */
152     p_scb->dealloc = TRUE;
153     /* remove sdp records */
154     bta_ag_del_records(p_scb, p_data);
155     /* remove rfcomm servers */
156     bta_ag_close_servers(p_scb, p_scb->reg_services);
157     /* dealloc */
158     bta_ag_scb_dealloc(p_scb);
159 }
160 
161 /*******************************************************************************
162 **
163 ** Function         bta_ag_start_dereg
164 **
165 ** Description      Start a deregister event.
166 **
167 **
168 ** Returns          void
169 **
170 *******************************************************************************/
bta_ag_start_dereg(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)171 void bta_ag_start_dereg(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
172 {
173     /* set dealloc */
174     p_scb->dealloc = TRUE;
175     /* remove sdp records */
176     bta_ag_del_records(p_scb, p_data);
177 }
178 
179 /*******************************************************************************
180 **
181 ** Function         bta_ag_start_open
182 **
183 ** Description      This starts an AG open.
184 **
185 **
186 ** Returns          void
187 **
188 *******************************************************************************/
bta_ag_start_open(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)189 void bta_ag_start_open(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
190 {
191     BD_ADDR pending_bd_addr;
192     /* store parameters */
193     if (p_data) {
194         bdcpy(p_scb->peer_addr, p_data->api_open.bd_addr);
195         p_scb->open_services = p_data->api_open.services;
196         p_scb->cli_sec_mask = p_data->api_open.sec_mask;
197     }
198     /* Check if RFCOMM has any incoming connection to avoid collision. */
199     if (PORT_IsOpening (pending_bd_addr)) {
200         /* Let the incoming connection goes through.                        */
201         /* Issue collision for this scb for now.                            */
202         /* We will decide what to do when we find incoming connetion later. */
203         bta_ag_collision_cback (0, BTA_ID_AG, 0, p_scb->peer_addr);
204         return;
205     }
206     /* close servers */
207     bta_ag_close_servers(p_scb, p_scb->reg_services);
208     /* set role */
209     p_scb->role = BTA_AG_INT;
210     /* do service search */
211     bta_ag_do_disc(p_scb, p_scb->open_services);
212 }
213 
214 /*******************************************************************************
215 **
216 ** Function         bta_ag_disc_int_res
217 **
218 ** Description      This function handles a discovery result when initiator.
219 **
220 **
221 ** Returns          void
222 **
223 *******************************************************************************/
bta_ag_disc_int_res(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)224 void bta_ag_disc_int_res(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
225 {
226     UINT16 event = BTA_AG_DISC_FAIL_EVT;
227     APPL_TRACE_DEBUG ("bta_ag_disc_int_res: Status: %d", p_data->disc_result.status);
228 
229     /* if found service */
230     if (p_data->disc_result.status == SDP_SUCCESS ||
231         p_data->disc_result.status == SDP_DB_FULL) {
232         /* get attributes */
233         if (bta_ag_sdp_find_attr(p_scb, p_scb->open_services)) {
234             /* set connected service */
235             p_scb->conn_service = bta_ag_service_to_idx(p_scb->open_services);
236             /* send ourselves sdp ok event */
237             event = BTA_AG_DISC_OK_EVT;
238         }
239     }
240     /* free discovery db */
241     bta_ag_free_db(p_scb, p_data);
242     /* if service not found check if we should search for other service */
243     if ((event == BTA_AG_DISC_FAIL_EVT) &&
244         (p_data->disc_result.status == SDP_SUCCESS ||
245          p_data->disc_result.status == SDP_DB_FULL ||
246          p_data->disc_result.status == SDP_NO_RECS_MATCH)) {
247         if ((p_scb->open_services & BTA_HFP_SERVICE_MASK) &&
248             (p_scb->open_services & BTA_HSP_SERVICE_MASK)) {
249             /* search for HSP */
250             p_scb->open_services &= ~BTA_HFP_SERVICE_MASK;
251             bta_ag_do_disc(p_scb, p_scb->open_services);
252         } else if ((p_scb->open_services & BTA_HSP_SERVICE_MASK) &&
253                  (p_scb->hsp_version == HSP_VERSION_1_2)) {
254             /* search for UUID_SERVCLASS_HEADSET for HSP 1.0 device */
255             p_scb->hsp_version = HSP_VERSION_1_0;
256             bta_ag_do_disc(p_scb, p_scb->open_services);
257         } else {
258             /* send ourselves sdp ok/fail event */
259             bta_ag_sm_execute(p_scb, event, p_data);
260         }
261     } else {
262         /* send ourselves sdp ok/fail event */
263         bta_ag_sm_execute(p_scb, event, p_data);
264     }
265 }
266 
267 /*******************************************************************************
268 **
269 ** Function         bta_ag_disc_acp_res
270 **
271 ** Description      This function handles a discovery result when acceptor.
272 **
273 **
274 ** Returns          void
275 **
276 *******************************************************************************/
bta_ag_disc_acp_res(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)277 void bta_ag_disc_acp_res(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
278 {
279     /* if found service */
280     if (p_data->disc_result.status == SDP_SUCCESS ||
281         p_data->disc_result.status == SDP_DB_FULL) {
282         /* get attributes */
283         bta_ag_sdp_find_attr(p_scb, bta_ag_svc_mask[p_scb->conn_service]);
284     }
285     /* free discovery db */
286     bta_ag_free_db(p_scb, p_data);
287 }
288 
289 /*******************************************************************************
290 **
291 ** Function         bta_ag_disc_fail
292 **
293 ** Description      This function handles a discovery failure.
294 **
295 **
296 ** Returns          void
297 **
298 *******************************************************************************/
bta_ag_disc_fail(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)299 void bta_ag_disc_fail(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
300 {
301     UNUSED(p_data);
302     /* reopen registered servers */
303     bta_ag_start_servers(p_scb, p_scb->reg_services);
304     /* reinitialize stuff */
305     /* call open cback w. failure */
306     bta_ag_cback_open(p_scb, NULL, BTA_AG_FAIL_SDP);
307 }
308 
309 /*******************************************************************************
310 **
311 ** Function         bta_ag_open_fail
312 **
313 ** Description      open connection failed.
314 **
315 **
316 ** Returns          void
317 **
318 *******************************************************************************/
bta_ag_open_fail(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)319 void bta_ag_open_fail(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
320 {
321     /* call open cback w. failure */
322     bta_ag_cback_open(p_scb, p_data, BTA_AG_FAIL_RESOURCES);
323 }
324 
325 /*******************************************************************************
326 **
327 ** Function         bta_ag_rfc_fail
328 **
329 ** Description      RFCOMM connection failed.
330 **
331 **
332 ** Returns          void
333 **
334 *******************************************************************************/
bta_ag_rfc_fail(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)335 void bta_ag_rfc_fail(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
336 {
337     UNUSED(p_data);
338     /* reinitialize stuff */
339     p_scb->conn_handle = 0;
340     p_scb->conn_service = 0;
341     p_scb->peer_features = 0;
342 #if (BTM_WBS_INCLUDED == TRUE)
343     p_scb->peer_codecs = BTA_AG_CODEC_NONE;
344     p_scb->sco_codec = BTA_AG_CODEC_NONE;
345 #endif
346     p_scb->role = 0;
347     p_scb->svc_conn = FALSE;
348     p_scb->hsp_version = HSP_VERSION_1_2;
349     /*Clear the BD address*/
350     bdcpy(p_scb->peer_addr, bd_addr_null);
351     /* reopen registered servers */
352     bta_ag_start_servers(p_scb, p_scb->reg_services);
353     /* call open cback w. failure */
354     bta_ag_cback_open(p_scb, NULL, BTA_AG_FAIL_RFCOMM);
355 }
356 
357 /*******************************************************************************
358 **
359 ** Function         bta_ag_rfc_close
360 **
361 ** Description      RFCOMM connection closed.
362 **
363 **
364 ** Returns          void
365 **
366 *******************************************************************************/
bta_ag_rfc_close(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)367 void bta_ag_rfc_close(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
368 {
369     tBTA_AG_CLOSE    close;
370     tBTA_SERVICE_MASK services;
371     int i, num_active_conn = 0;
372     UNUSED(p_data);
373     /* reinitialize stuff */
374     p_scb->conn_service = 0;
375     p_scb->peer_features = 0;
376 #if (BTM_WBS_INCLUDED == TRUE)
377     p_scb->peer_codecs = BTA_AG_CODEC_NONE;
378     p_scb->sco_codec = BTA_AG_CODEC_NONE;
379     /* Clear these flags upon SLC teardown */
380     p_scb->codec_updated = FALSE;
381     p_scb->codec_fallback = FALSE;
382     p_scb->codec_msbc_settings = BTA_AG_SCO_MSBC_SETTINGS_T2;
383 #endif
384     p_scb->role = 0;
385     p_scb->post_sco = BTA_AG_POST_SCO_NONE;
386     p_scb->svc_conn = FALSE;
387     p_scb->hsp_version = HSP_VERSION_1_2;
388     bta_ag_at_reinit(&p_scb->at_cb);
389     /* stop timers */
390     bta_sys_stop_timer(&p_scb->act_timer);
391 #if (BTM_WBS_INCLUDED == TRUE)
392     bta_sys_stop_timer(&p_scb->cn_timer);
393 #endif
394     close.hdr.handle = bta_ag_scb_to_idx(p_scb);
395     close.hdr.app_id = p_scb->app_id;
396     bdcpy(close.bd_addr, p_scb->peer_addr);
397 
398     bta_sys_conn_close(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
399 
400     /* call close call-out */
401 #if (BTM_SCO_HCI_INCLUDED == TRUE)
402     bta_ag_sco_co_close();
403 #endif
404     /* call close cback */
405     (*bta_ag_cb.p_cback)(BTA_AG_CLOSE_EVT, (tBTA_AG *) &close);
406 
407     /* if not deregistering (deallocating) reopen registered servers */
408     if (p_scb->dealloc == FALSE) {
409         /* Clear peer bd_addr so instance can be reused */
410         bdcpy(p_scb->peer_addr, bd_addr_null);
411 
412         /* start only unopened server */
413         services = p_scb->reg_services;
414         for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++) {
415             if (p_scb->serv_handle[i]) {
416                 services &= ~((tBTA_SERVICE_MASK)1 << (BTA_HSP_SERVICE_ID + i));
417             }
418         }
419         bta_ag_start_servers(p_scb, services);
420         p_scb->conn_handle = 0;
421         /* Make sure SCO state is BTA_AG_SCO_SHUTDOWN_ST */
422         bta_ag_sco_shutdown(p_scb, NULL);
423         /* Check if all the SLCs are down */
424         for (i = 0; i < BTA_AG_NUM_SCB; 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     } else {
433         /* else close port and deallocate scb */
434         RFCOMM_RemoveServer(p_scb->conn_handle);
435         bta_ag_scb_dealloc(p_scb);
436     }
437 }
438 
439 /*******************************************************************************
440 **
441 ** Function         bta_ag_rfc_open
442 **
443 ** Description      Handle RFCOMM channel open.
444 **
445 **
446 ** Returns          void
447 **
448 *******************************************************************************/
bta_ag_rfc_open(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)449 void bta_ag_rfc_open(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
450 {
451     /* initialize AT feature variables */
452     p_scb->clip_enabled = FALSE;
453     p_scb->ccwa_enabled = FALSE;
454     p_scb->cmer_enabled = FALSE;
455     p_scb->cmee_enabled = FALSE;
456     p_scb->inband_enabled = ((p_scb->features & BTA_AG_FEAT_INBAND) == BTA_AG_FEAT_INBAND);
457 
458     /* set up AT command interpreter */
459     p_scb->at_cb.p_at_tbl = (tBTA_AG_AT_CMD *) bta_ag_at_tbl[p_scb->conn_service];
460     p_scb->at_cb.p_cmd_cback = (tBTA_AG_AT_CMD_CBACK *) bta_ag_at_cback_tbl[p_scb->conn_service];
461     p_scb->at_cb.p_err_cback = (tBTA_AG_AT_ERR_CBACK *) bta_ag_at_err_cback;
462     p_scb->at_cb.p_user = p_scb;
463     p_scb->at_cb.cmd_max_len = BTA_AG_CMD_MAX;
464     bta_ag_at_init(&p_scb->at_cb);
465 
466     /* call app open call-out */
467     bta_sys_conn_open(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
468     bta_ag_cback_open(p_scb, NULL, BTA_AG_SUCCESS);
469 
470     if (p_scb->conn_service == BTA_AG_HFP) {
471         /* if hfp start timer for service level conn */
472         bta_sys_start_timer(&p_scb->act_timer, BTA_AG_SVC_TOUT_EVT, p_bta_ag_cfg->conn_tout);
473     } else {
474         /* else service level conn is open */
475         bta_ag_svc_conn_open(p_scb, p_data);
476     }
477 }
478 
479 /*******************************************************************************
480 **
481 ** Function         bta_ag_rfc_acp_open
482 **
483 ** Description      Handle RFCOMM channel open when accepting connection.
484 **
485 **
486 ** Returns          void
487 **
488 *******************************************************************************/
bta_ag_rfc_acp_open(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)489 void bta_ag_rfc_acp_open(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
490 {
491     UINT16          lcid;
492     int             i;
493     tBTA_AG_SCB     *ag_scb, *other_scb;
494     BD_ADDR         dev_addr = {0};
495     int             status;
496     /* set role */
497     p_scb->role = BTA_AG_ACP;
498     APPL_TRACE_DEBUG ("bta_ag_rfc_acp_open: serv_handle0 = %d serv_handle1 = %d",
499                        p_scb->serv_handle[0], p_scb->serv_handle[1]);
500     /* get bd addr of peer */
501     if (PORT_SUCCESS != (status = PORT_CheckConnection(p_data->rfc.port_handle, FALSE, dev_addr, &lcid))) {
502         APPL_TRACE_DEBUG ("bta_ag_rfc_acp_open error PORT_CheckConnection returned status %d", status);
503     }
504     /* Collision Handling */
505     for (i = 0, ag_scb = &bta_ag_cb.scb[0]; i < BTA_AG_NUM_SCB; i++, ag_scb++) {
506         if ((ag_scb->in_use) && (ag_scb->colli_tmr_on)) {
507             /* stop collision timer */
508             ag_scb->colli_tmr_on = FALSE;
509             bta_sys_stop_timer (&ag_scb->colli_timer);
510 
511             if (bdcmp (dev_addr, ag_scb->peer_addr) == 0) {
512                 /* If incoming and outgoing device are same, nothing more to do.            */
513                 /* Outgoing conn will be aborted because we have successful incoming conn.  */
514             } else {
515                 /* Resume outgoing connection. */
516                 other_scb = bta_ag_get_other_idle_scb (p_scb);
517                 if (other_scb) {
518                     bdcpy(other_scb->peer_addr, ag_scb->peer_addr);
519                     other_scb->open_services = ag_scb->open_services;
520                     other_scb->cli_sec_mask = ag_scb->cli_sec_mask;
521                     bta_ag_resume_open (other_scb);
522                 }
523             }
524             break;
525         }
526     }
527     bdcpy (p_scb->peer_addr, dev_addr);
528     /* determine connected service from port handle */
529     for (i = 0; i < BTA_AG_NUM_IDX; i++) {
530         APPL_TRACE_DEBUG ("bta_ag_rfc_acp_open: i = %d serv_handle = %d port_handle = %d",
531                            i, p_scb->serv_handle[i], p_data->rfc.port_handle);
532         if (p_scb->serv_handle[i] == p_data->rfc.port_handle) {
533             p_scb->conn_service = i;
534             p_scb->conn_handle = p_data->rfc.port_handle;
535             break;
536         }
537     }
538     APPL_TRACE_DEBUG ("bta_ag_rfc_acp_open: conn_service = %d conn_handle = %d",
539                        p_scb->conn_service, p_scb->conn_handle);
540     /* close any unopened server */
541     bta_ag_close_servers(p_scb, (p_scb->reg_services & ~bta_ag_svc_mask[p_scb->conn_service]));
542     /* do service discovery to get features */
543     bta_ag_do_disc(p_scb, bta_ag_svc_mask[p_scb->conn_service]);
544     /* continue with common open processing */
545     bta_ag_rfc_open(p_scb, p_data);
546 }
547 
548 /*******************************************************************************
549 **
550 ** Function         bta_ag_rfc_data
551 **
552 ** Description      Read and process data from RFCOMM.
553 **
554 **
555 ** Returns          void
556 **
557 *******************************************************************************/
bta_ag_rfc_data(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)558 void bta_ag_rfc_data(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
559 {
560     UINT16  len;
561     char    buf[BTA_AG_RFC_READ_MAX];
562     UNUSED(p_data);
563     memset(buf, 0, BTA_AG_RFC_READ_MAX);
564 
565     APPL_TRACE_DEBUG("bta_ag_rfc_data");
566     /* do the following */
567     for (;;) {
568         /* read data from rfcomm; if bad status, we're done */
569         if (PORT_ReadData(p_scb->conn_handle, buf, BTA_AG_RFC_READ_MAX, &len) != PORT_SUCCESS) {
570             break;
571         }
572         /* if no data, we're done */
573         if (len == 0) {
574             break;
575         }
576         /* run AT command interpreter on data */
577         bta_sys_busy(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
578         bta_ag_at_parse(&p_scb->at_cb, buf, len);
579         bta_sys_idle(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
580         /* no more data to read, we're done */
581         if (len < BTA_AG_RFC_READ_MAX) {
582             break;
583         }
584     }
585 }
586 
587 /*******************************************************************************
588 **
589 ** Function         bta_ag_start_close
590 **
591 ** Description      Start the process of closing SCO and RFCOMM connection.
592 **
593 **
594 ** Returns          void
595 **
596 *******************************************************************************/
bta_ag_start_close(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)597 void bta_ag_start_close(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
598 {
599     /* Take the link out of sniff and set L2C idle time to 0 */
600     bta_dm_pm_active(p_scb->peer_addr);
601     L2CA_SetIdleTimeoutByBdAddr(p_scb->peer_addr, 0, BT_TRANSPORT_BR_EDR);
602     /* if SCO is open close SCO and wait on RFCOMM close */
603     if (bta_ag_sco_is_open(p_scb)) {
604         p_scb->post_sco = BTA_AG_POST_SCO_CLOSE_RFC;
605     } else {
606         p_scb->post_sco = BTA_AG_POST_SCO_NONE;
607         bta_ag_rfc_do_close(p_scb, p_data);
608     }
609     /* Always do SCO shutdown to handle all SCO corner cases */
610     bta_ag_sco_shutdown(p_scb, p_data);
611 }
612 
613 /*******************************************************************************
614 **
615 ** Function         bta_ag_post_sco_open
616 **
617 ** Description      Perform post-SCO open action, if any
618 **
619 **
620 ** Returns          void
621 **
622 *******************************************************************************/
bta_ag_post_sco_open(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)623 void bta_ag_post_sco_open(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
624 {
625     switch (p_scb->post_sco) {
626         case BTA_AG_POST_SCO_RING:
627             bta_ag_send_ring(p_scb, p_data);
628             p_scb->post_sco = BTA_AG_POST_SCO_NONE;
629             break;
630 
631         case BTA_AG_POST_SCO_CALL_CONN:
632             bta_ag_send_call_inds(p_scb, BTA_AG_IN_CALL_CONN_RES);
633             p_scb->post_sco = BTA_AG_POST_SCO_NONE;
634             break;
635 
636         default:
637             break;
638     }
639 }
640 
641 /*******************************************************************************
642 **
643 ** Function         bta_ag_post_sco_close
644 **
645 ** Description      Perform post-SCO close action, if any
646 **
647 **
648 ** Returns          void
649 **
650 *******************************************************************************/
bta_ag_post_sco_close(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)651 void bta_ag_post_sco_close(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
652 {
653     switch (p_scb->post_sco) {
654         case BTA_AG_POST_SCO_CLOSE_RFC:
655             bta_ag_rfc_do_close(p_scb, p_data);
656             p_scb->post_sco = BTA_AG_POST_SCO_NONE;
657             break;
658 
659         case BTA_AG_POST_SCO_CALL_CONN:
660             bta_ag_send_call_inds(p_scb, BTA_AG_IN_CALL_CONN_RES);
661             p_scb->post_sco = BTA_AG_POST_SCO_NONE;
662             break;
663 
664         case BTA_AG_POST_SCO_CALL_ORIG:
665             bta_ag_send_call_inds(p_scb, BTA_AG_OUT_CALL_ORIG_RES);
666             p_scb->post_sco = BTA_AG_POST_SCO_NONE;
667             break;
668 
669         case BTA_AG_POST_SCO_CALL_END:
670             bta_ag_send_call_inds(p_scb, BTA_AG_END_CALL_RES);
671             p_scb->post_sco = BTA_AG_POST_SCO_NONE;
672             break;
673 
674         case BTA_AG_POST_SCO_CALL_END_INCALL:
675         {
676             bta_ag_send_call_inds(p_scb, BTA_AG_END_CALL_RES);
677             /* Sending callsetup IND and Ring were defered to after SCO close. */
678             bta_ag_send_call_inds(p_scb, BTA_AG_IN_CALL_RES);
679 
680             if (bta_ag_inband_enabled(p_scb) && !(p_scb->features & BTA_AG_FEAT_NOSCO)) {
681                 p_scb->post_sco = BTA_AG_POST_SCO_RING;
682                 bta_ag_sco_open(p_scb, p_data);
683             } else {
684                 p_scb->post_sco = BTA_AG_POST_SCO_NONE;
685                 bta_ag_send_ring(p_scb, p_data);
686             }
687             break;
688         }
689 
690         default:
691             break;
692     }
693 }
694 
695 /*******************************************************************************
696 **
697 ** Function         bta_ag_svc_conn_open
698 **
699 ** Description      Service level connection opened
700 **
701 **
702 ** Returns          void
703 **
704 *******************************************************************************/
bta_ag_svc_conn_open(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)705 void bta_ag_svc_conn_open(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
706 {
707     tBTA_AG_CONN evt;
708     UNUSED(p_data);
709 
710     if (!p_scb->svc_conn) {
711         /* set state variable */
712         p_scb->svc_conn = TRUE;
713         /* Clear AT+BIA mask from previous SLC if any. */
714         p_scb->bia_masked_out = 0;
715         /* stop timer */
716         bta_sys_stop_timer(&p_scb->act_timer);
717         /* call callback */
718         evt.hdr.handle = bta_ag_scb_to_idx(p_scb);
719         evt.hdr.app_id = p_scb->app_id;
720         evt.peer_feat = p_scb->peer_features;
721         bdcpy(evt.bd_addr, p_scb->peer_addr);
722 #if (BTM_WBS_INCLUDED == TRUE)
723         evt.peer_codec  = p_scb->peer_codecs;
724 #endif
725         if ((p_scb->call_ind != BTA_AG_CALL_INACTIVE) ||
726             (p_scb->callsetup_ind != BTA_AG_CALLSETUP_NONE)) {
727             bta_sys_sco_use(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
728         }
729         (*bta_ag_cb.p_cback)(BTA_AG_CONN_EVT, (tBTA_AG *) &evt);
730     }
731 }
732 
733 /*******************************************************************************
734 **
735 ** Function         bta_ag_ci_rx_data
736 **
737 ** Description      Send result code to RFCOMM
738 **
739 ** Returns          void
740 **
741 *******************************************************************************/
bta_ag_ci_rx_data(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)742 void bta_ag_ci_rx_data(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
743 {
744     UINT16 len;
745     tBTA_AG_CI_RX_WRITE *p_rx_write_msg = (tBTA_AG_CI_RX_WRITE *)p_data;
746     char *p_data_area = (char *)(p_rx_write_msg+1);     /* Point to data area after header */
747 
748     APPL_TRACE_DEBUG("bta_ag_ci_rx_data:");
749     /* send to RFCOMM */
750     bta_sys_busy(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
751     PORT_WriteData(p_scb->conn_handle, p_data_area, strlen(p_data_area), &len);
752     bta_sys_idle(BTA_ID_AG, p_scb->app_id, p_scb->peer_addr);
753 }
754 
755 /*******************************************************************************
756 **
757 ** Function         bta_ag_rcvd_slc_ready
758 **
759 ** Description      Handles SLC ready call-in in case of pass-through mode.
760 **
761 ** Returns          void
762 **
763 *******************************************************************************/
bta_ag_rcvd_slc_ready(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)764 void bta_ag_rcvd_slc_ready(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
765 {
766     UNUSED(p_data);
767     APPL_TRACE_DEBUG("bta_ag_rcvd_slc_ready: handle = %d", bta_ag_scb_to_idx(p_scb));
768 
769     if (bta_ag_cb.parse_mode == BTA_AG_PASS_THROUGH) {
770         /* In pass-through mode, BTA knows that SLC is ready only through call-in. */
771         bta_ag_svc_conn_open(p_scb, NULL);
772     }
773 }
774 
775 /*******************************************************************************
776 **
777 ** Function         bta_ag_setcodec
778 **
779 ** Description      Handle API SetCodec
780 **
781 **
782 ** Returns          void
783 **
784 *******************************************************************************/
bta_ag_setcodec(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)785 void bta_ag_setcodec(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
786 {
787 #if (BTM_WBS_INCLUDED == TRUE)
788     tBTA_AG_PEER_CODEC codec_type = p_data->api_setcodec.codec;
789     tBTA_AG_VAL        val;
790 
791     /* Check if the requested codec type is valid */
792     if((codec_type != BTA_AG_CODEC_NONE) &&
793        (codec_type != BTA_AG_CODEC_CVSD) &&
794        (codec_type != BTA_AG_CODEC_MSBC)) {
795         val.num = codec_type;
796         val.hdr.status = BTA_AG_FAIL_RESOURCES;
797         APPL_TRACE_ERROR("%s error: unsupported codec type %d", __func__, codec_type);
798         (*bta_ag_cb.p_cback)(BTA_AG_WBS_EVT, (tBTA_AG *) &val);
799         return;
800     }
801 
802     if ((p_scb->peer_codecs & codec_type) ||
803         (codec_type == BTA_AG_CODEC_NONE) ||
804         (codec_type == BTA_AG_CODEC_CVSD)) {
805         p_scb->sco_codec = codec_type;
806         p_scb->codec_updated = TRUE;
807         val.num = codec_type;
808         val.hdr.status = BTA_AG_SUCCESS;
809         APPL_TRACE_DEBUG("%s: Updated codec type %d", __func__, codec_type);
810     } else {
811         val.num = codec_type;
812         val.hdr.status = BTA_AG_FAIL_RESOURCES;
813         APPL_TRACE_ERROR("%s error: unsupported codec type %d",__func__, codec_type);
814     }
815     (*bta_ag_cb.p_cback)(BTA_AG_WBS_EVT, (tBTA_AG *) &val);
816 #endif
817 }
818 
819 #endif /* #if (BTA_AG_INCLUDED == TRUE) */
820