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 the audio gateway functions performing SDP
22 * operations.
23 *
24 ******************************************************************************/
25
26 #include <string.h>
27 #include "bta_api.h"
28 #include "bta_sys.h"
29 #include "bta_ag_api.h"
30 #include "bta_ag_int.h"
31 #include "sdp_api.h"
32 #include "btm_api.h"
33 #include "bt_common.h"
34 #include "utl.h"
35
36 /* Number of protocol elements in protocol element list. */
37 #define BTA_AG_NUM_PROTO_ELEMS 2
38
39 /* Number of elements in service class id list. */
40 #define BTA_AG_NUM_SVC_ELEMS 2
41
42 /* size of database for service discovery */
43 #ifndef BTA_AG_DISC_BUF_SIZE
44 #define BTA_AG_DISC_BUF_SIZE BT_DEFAULT_BUFFER_SIZE
45 #endif
46
47 /* declare sdp callback functions */
48 void bta_ag_sdp_cback_1(UINT16 status);
49 void bta_ag_sdp_cback_2(UINT16 status);
50 void bta_ag_sdp_cback_3(UINT16 status);
51
52 /* SDP callback function table */
53 typedef tSDP_DISC_CMPL_CB *tBTA_AG_SDP_CBACK;
54 const tBTA_AG_SDP_CBACK bta_ag_sdp_cback_tbl[] =
55 {
56 bta_ag_sdp_cback_1,
57 bta_ag_sdp_cback_2,
58 bta_ag_sdp_cback_3
59 };
60
61 /*******************************************************************************
62 **
63 ** Function bta_ag_sdp_cback
64 **
65 ** Description SDP callback function.
66 **
67 **
68 ** Returns void
69 **
70 *******************************************************************************/
bta_ag_sdp_cback(UINT16 status,UINT8 idx)71 static void bta_ag_sdp_cback(UINT16 status, UINT8 idx)
72 {
73 UINT16 event;
74 tBTA_AG_SCB *p_scb;
75
76 APPL_TRACE_DEBUG("bta_ag_sdp_cback status:0x%x", status);
77
78 if ((p_scb = bta_ag_scb_by_idx(idx)) != NULL)
79 {
80 /* set event according to int/acp */
81 if (p_scb->role == BTA_AG_ACP)
82 {
83 event = BTA_AG_DISC_ACP_RES_EVT;
84 }
85 else
86 {
87 event = BTA_AG_DISC_INT_RES_EVT;
88 }
89
90 tBTA_AG_DISC_RESULT *p_buf =
91 (tBTA_AG_DISC_RESULT *)osi_malloc(sizeof(tBTA_AG_DISC_RESULT));
92 p_buf->hdr.event = event;
93 p_buf->hdr.layer_specific = idx;
94 p_buf->status = status;
95 bta_sys_sendmsg(p_buf);
96 }
97 }
98
99 /*******************************************************************************
100 **
101 ** Function bta_ag_sdp_cback_1 to 3
102 **
103 ** Description SDP callback functions. Since there is no way to
104 ** distinguish scb from the callback we need separate
105 ** callbacks for each scb.
106 **
107 **
108 ** Returns void
109 **
110 *******************************************************************************/
bta_ag_sdp_cback_1(UINT16 status)111 void bta_ag_sdp_cback_1(UINT16 status) {bta_ag_sdp_cback(status, 1);}
bta_ag_sdp_cback_2(UINT16 status)112 void bta_ag_sdp_cback_2(UINT16 status) {bta_ag_sdp_cback(status, 2);}
bta_ag_sdp_cback_3(UINT16 status)113 void bta_ag_sdp_cback_3(UINT16 status) {bta_ag_sdp_cback(status, 3);}
114
115 /******************************************************************************
116 **
117 ** Function bta_ag_add_record
118 **
119 ** Description This function is called by a server application to add
120 ** HSP or HFP information to an SDP record. Prior to
121 ** calling this function the application must call
122 ** SDP_CreateRecord() to create an SDP record.
123 **
124 ** Returns TRUE if function execution succeeded,
125 ** FALSE if function execution failed.
126 **
127 ******************************************************************************/
bta_ag_add_record(UINT16 service_uuid,char * p_service_name,UINT8 scn,tBTA_AG_FEAT features,UINT32 sdp_handle)128 BOOLEAN bta_ag_add_record(UINT16 service_uuid, char *p_service_name, UINT8 scn,
129 tBTA_AG_FEAT features, UINT32 sdp_handle)
130 {
131 tSDP_PROTOCOL_ELEM proto_elem_list[BTA_AG_NUM_PROTO_ELEMS];
132 UINT16 svc_class_id_list[BTA_AG_NUM_SVC_ELEMS];
133 UINT16 browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
134 UINT16 version;
135 UINT16 profile_uuid;
136 UINT8 network;
137 BOOLEAN result = TRUE;
138 BOOLEAN codec_supported = FALSE;
139 UINT8 buf[2];
140
141 APPL_TRACE_DEBUG("bta_ag_add_record uuid: %x", service_uuid);
142
143 memset( proto_elem_list, 0 , BTA_AG_NUM_PROTO_ELEMS*sizeof(tSDP_PROTOCOL_ELEM));
144
145 /* add the protocol element sequence */
146 proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
147 proto_elem_list[0].num_params = 0;
148 proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
149 proto_elem_list[1].num_params = 1;
150 proto_elem_list[1].params[0] = scn;
151 result &= SDP_AddProtocolList(sdp_handle, BTA_AG_NUM_PROTO_ELEMS, proto_elem_list);
152
153 /* add service class id list */
154 svc_class_id_list[0] = service_uuid;
155 svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
156 result &= SDP_AddServiceClassIdList(sdp_handle, BTA_AG_NUM_SVC_ELEMS, svc_class_id_list);
157
158 /* add profile descriptor list */
159 if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE)
160 {
161 profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
162 version = HFP_VERSION_1_6;
163 }
164 else
165 {
166 profile_uuid = UUID_SERVCLASS_HEADSET;
167 version = HSP_VERSION_1_2;
168 }
169 result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
170
171 /* add service name */
172 if (p_service_name != NULL && p_service_name[0] != 0)
173 {
174 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
175 (UINT32)(strlen(p_service_name)+1), (UINT8 *) p_service_name);
176 }
177
178 /* add features and network */
179 if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE)
180 {
181 network = (features & BTA_AG_FEAT_REJECT) ? 1 : 0;
182 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_DATA_STORES_OR_NETWORK,
183 UINT_DESC_TYPE, 1, &network);
184
185 if (features & BTA_AG_FEAT_CODEC)
186 codec_supported = TRUE;
187
188 features &= BTA_AG_SDP_FEAT_SPEC;
189
190 /* Codec bit position is different in SDP and in BRSF */
191 if (codec_supported)
192 features |= 0x0020;
193
194 UINT16_TO_BE_FIELD(buf, features);
195 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE, 2, buf);
196 }
197
198 /* add browse group list */
199 result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list);
200
201 return result;
202 }
203
204 /*******************************************************************************
205 **
206 ** Function bta_ag_create_records
207 **
208 ** Description Create SDP records for registered services.
209 **
210 **
211 ** Returns void
212 **
213 *******************************************************************************/
bta_ag_create_records(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)214 void bta_ag_create_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
215 {
216 int i;
217 tBTA_SERVICE_MASK services;
218
219 services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
220 for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1)
221 {
222 /* if service is set in mask */
223 if (services & 1)
224 {
225 /* add sdp record if not already registered */
226 if (bta_ag_cb.profile[i].sdp_handle == 0)
227 {
228 bta_ag_cb.profile[i].sdp_handle = SDP_CreateRecord();
229 bta_ag_cb.profile[i].scn = BTM_AllocateSCN();
230 bta_ag_add_record(bta_ag_uuid[i], p_data->api_register.p_name[i],
231 bta_ag_cb.profile[i].scn, p_data->api_register.features,
232 bta_ag_cb.profile[i].sdp_handle);
233 bta_sys_add_uuid(bta_ag_uuid[i]);
234 }
235 }
236 }
237
238 p_scb->hsp_version = HSP_VERSION_1_2;
239
240 }
241
242 /*******************************************************************************
243 **
244 ** Function bta_ag_del_records
245 **
246 ** Description Delete SDP records for any registered services.
247 **
248 **
249 ** Returns void
250 **
251 *******************************************************************************/
bta_ag_del_records(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)252 void bta_ag_del_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
253 {
254 tBTA_AG_SCB *p = &bta_ag_cb.scb[0];
255 tBTA_SERVICE_MASK services;
256 tBTA_SERVICE_MASK others = 0;
257 int i;
258 UNUSED(p_data);
259
260 /* get services of all other registered servers */
261 for (i = 0; i < BTA_AG_NUM_IDX; i++, p++)
262 {
263 if (p_scb == p)
264 {
265 continue;
266 }
267
268 if (p->in_use && p->dealloc == FALSE)
269 {
270 others |= p->reg_services;
271 }
272 }
273
274 others >>= BTA_HSP_SERVICE_ID;
275 services = p_scb->reg_services >> BTA_HSP_SERVICE_ID;
276 for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1, others >>= 1)
277 {
278 /* if service registered for this scb and not registered for any other scb */
279 if (((services & 1) == 1) && ((others & 1) == 0))
280 {
281 APPL_TRACE_DEBUG("bta_ag_del_records %d", i);
282 if (bta_ag_cb.profile[i].sdp_handle != 0)
283 {
284 SDP_DeleteRecord(bta_ag_cb.profile[i].sdp_handle);
285 bta_ag_cb.profile[i].sdp_handle = 0;
286 }
287 BTM_FreeSCN(bta_ag_cb.profile[i].scn);
288 BTM_SecClrService(bta_ag_sec_id[i]);
289 bta_sys_remove_uuid(bta_ag_uuid[i]);
290 }
291 }
292 }
293
294 /*******************************************************************************
295 **
296 ** Function bta_ag_sdp_find_attr
297 **
298 ** Description Process SDP discovery results to find requested attributes
299 ** for requested service.
300 **
301 **
302 ** Returns TRUE if results found, FALSE otherwise.
303 **
304 *******************************************************************************/
bta_ag_sdp_find_attr(tBTA_AG_SCB * p_scb,tBTA_SERVICE_MASK service)305 BOOLEAN bta_ag_sdp_find_attr(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
306 {
307 tSDP_DISC_REC *p_rec = NULL;
308 tSDP_DISC_ATTR *p_attr;
309 tSDP_PROTOCOL_ELEM pe;
310 UINT16 uuid;
311 BOOLEAN result = FALSE;
312
313 if (service & BTA_HFP_SERVICE_MASK)
314 {
315 uuid = UUID_SERVCLASS_HF_HANDSFREE;
316 p_scb->peer_version = HFP_VERSION_1_1; /* Default version */
317 }
318 else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
319 {
320 uuid = UUID_SERVCLASS_HEADSET_HS;
321 p_scb->peer_version = 0x0100; /* Default version */
322 }
323 else
324 {
325 return result;
326 }
327
328 /* loop through all records we found */
329 while (TRUE)
330 {
331 /* get next record; if none found, we're done */
332 if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL)
333 {
334 if (uuid == UUID_SERVCLASS_HEADSET_HS)
335 {
336 /* Search again in case the peer device is HSP v1.0 */
337 uuid = UUID_SERVCLASS_HEADSET;
338 if ((p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec)) == NULL)
339 {
340 break;
341 }
342 }
343 else
344 break;
345 }
346
347 /* get scn from proto desc list if initiator */
348 if (p_scb->role == BTA_AG_INT)
349 {
350 if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe))
351 {
352 p_scb->peer_scn = (UINT8) pe.params[0];
353 }
354 else
355 {
356 continue;
357 }
358 }
359
360 /* get profile version (if failure, version parameter is not updated) */
361 SDP_FindProfileVersionInRec(p_rec, uuid, &p_scb->peer_version);
362
363 /* get features if HFP */
364 if (service & BTA_HFP_SERVICE_MASK)
365 {
366 if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES)) != NULL)
367 {
368 /* Found attribute. Get value. */
369 /* There might be race condition between SDP and BRSF. */
370 /* Do not update if we already received BRSF. */
371 if (p_scb->peer_features == 0)
372 p_scb->peer_features = p_attr->attr_value.v.u16;
373 }
374 }
375 else /* HSP */
376 {
377 if ((p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL)) != NULL)
378 {
379 /* Remote volume control of HSP */
380 if (p_attr->attr_value.v.u8)
381 p_scb->peer_features |= BTA_AG_PEER_FEAT_VOL;
382 else
383 p_scb->peer_features &= ~BTA_AG_PEER_FEAT_VOL;
384 }
385
386 }
387
388 /* found what we needed */
389 result = TRUE;
390 break;
391 }
392 return result;
393 }
394
395 /*******************************************************************************
396 **
397 ** Function bta_ag_do_disc
398 **
399 ** Description Do service discovery.
400 **
401 **
402 ** Returns void
403 **
404 *******************************************************************************/
bta_ag_do_disc(tBTA_AG_SCB * p_scb,tBTA_SERVICE_MASK service)405 void bta_ag_do_disc(tBTA_AG_SCB *p_scb, tBTA_SERVICE_MASK service)
406 {
407 tSDP_UUID uuid_list[2];
408 UINT16 num_uuid = 1;
409 UINT16 attr_list[4];
410 UINT8 num_attr;
411 BOOLEAN db_inited = FALSE;
412
413 /* HFP initiator; get proto list and features */
414 if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
415 {
416 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
417 attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
418 attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
419 attr_list[3] = ATTR_ID_SUPPORTED_FEATURES;
420 num_attr = 4;
421 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
422 }
423 /* HFP acceptor; get features */
424 else if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_ACP)
425 {
426 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
427 attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST;
428 attr_list[2] = ATTR_ID_SUPPORTED_FEATURES;
429 num_attr = 3;
430 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE;
431 }
432 /* HSP initiator; get proto list */
433 else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT)
434 {
435 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
436 attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
437 attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
438 attr_list[3] = ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL;
439 num_attr = 4;
440
441 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HEADSET; /* Legacy from HSP v1.0 */
442 if (p_scb->hsp_version >= HSP_VERSION_1_2)
443 {
444 uuid_list[1].uu.uuid16 = UUID_SERVCLASS_HEADSET_HS;
445 num_uuid = 2;
446 }
447 }
448 /* HSP acceptor; no discovery */
449 else
450 {
451 return;
452 }
453
454 /* allocate buffer for sdp database */
455 p_scb->p_disc_db = (tSDP_DISCOVERY_DB *)osi_malloc(BTA_AG_DISC_BUF_SIZE);
456 /* set up service discovery database; attr happens to be attr_list len */
457 uuid_list[0].len = LEN_UUID_16;
458 uuid_list[1].len = LEN_UUID_16;
459 db_inited = SDP_InitDiscoveryDb(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE,
460 num_uuid, uuid_list, num_attr, attr_list);
461
462 if(db_inited)
463 {
464 /*Service discovery not initiated */
465 db_inited = SDP_ServiceSearchAttributeRequest(p_scb->peer_addr, p_scb->p_disc_db,
466 bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]);
467 }
468
469 if(!db_inited)
470 {
471 /*free discover db */
472 bta_ag_free_db(p_scb, NULL);
473 /* sent failed event */
474 bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, NULL);
475 }
476
477 }
478
479 /*******************************************************************************
480 **
481 ** Function bta_ag_free_db
482 **
483 ** Description Free discovery database.
484 **
485 **
486 ** Returns void
487 **
488 *******************************************************************************/
bta_ag_free_db(tBTA_AG_SCB * p_scb,tBTA_AG_DATA * p_data)489 void bta_ag_free_db(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data)
490 {
491 UNUSED(p_data);
492 osi_free_and_reset((void **)&p_scb->p_disc_db);
493 }
494