1 /******************************************************************************
2 *
3 * Copyright 2014 The Android Open Source Project
4 * Copyright 2003-2012 Broadcom Corporation
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at:
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 *
18 ******************************************************************************/
19
20 /******************************************************************************
21 *
22 * This file contains the audio gateway functions performing SDP
23 * operations.
24 *
25 ******************************************************************************/
26
27 #include <string.h>
28 #include <base/logging.h>
29
30 #include "bt_utils.h"
31 #include "bta_api.h"
32 #include "bta_hf_client_api.h"
33 #include "bta_hf_client_int.h"
34 #include "bta_sys.h"
35 #include "osi/include/osi.h"
36 #include "osi/include/properties.h"
37
38 using bluetooth::Uuid;
39
40 /* Number of protocol elements in protocol element list. */
41 #define BTA_HF_CLIENT_NUM_PROTO_ELEMS 2
42
43 /* Number of elements in service class id list. */
44 #define BTA_HF_CLIENT_NUM_SVC_ELEMS 2
45
46 /*******************************************************************************
47 *
48 * Function bta_hf_client_sdp_cback
49 *
50 * Description SDP callback function.
51 *
52 *
53 * Returns void
54 *
55 ******************************************************************************/
bta_hf_client_sdp_cback(uint16_t status,void * data)56 static void bta_hf_client_sdp_cback(uint16_t status, void* data) {
57 uint16_t event;
58 tBTA_HF_CLIENT_DISC_RESULT* p_buf = (tBTA_HF_CLIENT_DISC_RESULT*)osi_malloc(
59 sizeof(tBTA_HF_CLIENT_DISC_RESULT));
60
61 APPL_TRACE_DEBUG("bta_hf_client_sdp_cback status:0x%x", status);
62 tBTA_HF_CLIENT_CB* client_cb = (tBTA_HF_CLIENT_CB*)data;
63
64 /* set event according to int/acp */
65 if (client_cb->role == BTA_HF_CLIENT_ACP)
66 event = BTA_HF_CLIENT_DISC_ACP_RES_EVT;
67 else
68 event = BTA_HF_CLIENT_DISC_INT_RES_EVT;
69
70 p_buf->hdr.event = event;
71 p_buf->hdr.layer_specific = client_cb->handle;
72 p_buf->status = status;
73
74 bta_sys_sendmsg(p_buf);
75 }
76
77 /******************************************************************************
78 *
79 * Function bta_hf_client_add_record
80 *
81 * Description This function is called by a server application to add
82 * HFP Client information to an SDP record. Prior to
83 * calling this function the application must call
84 * SDP_CreateRecord() to create an SDP record.
85 *
86 * Returns true if function execution succeeded,
87 * false if function execution failed.
88 *
89 *****************************************************************************/
bta_hf_client_add_record(const char * p_service_name,uint8_t scn,tBTA_HF_CLIENT_FEAT features,uint32_t sdp_handle)90 bool bta_hf_client_add_record(const char* p_service_name, uint8_t scn,
91 tBTA_HF_CLIENT_FEAT features,
92 uint32_t sdp_handle) {
93 tSDP_PROTOCOL_ELEM proto_elem_list[BTA_HF_CLIENT_NUM_PROTO_ELEMS];
94 uint16_t svc_class_id_list[BTA_HF_CLIENT_NUM_SVC_ELEMS];
95 uint16_t browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
96 uint16_t version;
97 uint16_t profile_uuid;
98 bool result = true;
99 uint8_t buf[2];
100 uint16_t sdp_features = 0;
101
102 APPL_TRACE_DEBUG("bta_hf_client_add_record");
103
104 memset(proto_elem_list, 0,
105 BTA_HF_CLIENT_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM));
106
107 /* add the protocol element sequence */
108 proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
109 proto_elem_list[0].num_params = 0;
110 proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
111 proto_elem_list[1].num_params = 1;
112 proto_elem_list[1].params[0] = scn;
113 result &= SDP_AddProtocolList(sdp_handle, BTA_HF_CLIENT_NUM_PROTO_ELEMS,
114 proto_elem_list);
115
116 /* add service class id list */
117 svc_class_id_list[0] = UUID_SERVCLASS_HF_HANDSFREE;
118 svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
119 result &= SDP_AddServiceClassIdList(sdp_handle, BTA_HF_CLIENT_NUM_SVC_ELEMS,
120 svc_class_id_list);
121
122 /* add profile descriptor list */
123 profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
124 version = HFP_VERSION_1_6;
125
126 if (osi_property_get_bool("persist.bluetooth.hfpclient.sco_s4_supported",
127 false))
128 version = HFP_VERSION_1_7;
129
130 result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
131
132 /* add service name */
133 if (p_service_name != NULL && p_service_name[0] != 0) {
134 result &= SDP_AddAttribute(
135 sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
136 (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name);
137 }
138
139 /* add features */
140 if (features & BTA_HF_CLIENT_FEAT_ECNR)
141 sdp_features |= BTA_HF_CLIENT_FEAT_ECNR;
142
143 if (features & BTA_HF_CLIENT_FEAT_3WAY)
144 sdp_features |= BTA_HF_CLIENT_FEAT_3WAY;
145
146 if (features & BTA_HF_CLIENT_FEAT_CLI) sdp_features |= BTA_HF_CLIENT_FEAT_CLI;
147
148 if (features & BTA_HF_CLIENT_FEAT_VREC)
149 sdp_features |= BTA_HF_CLIENT_FEAT_VREC;
150
151 if (features & BTA_HF_CLIENT_FEAT_VOL) sdp_features |= BTA_HF_CLIENT_FEAT_VOL;
152
153 /* Codec bit position is different in SDP (bit 5) and in BRSF (bit 7) */
154 if (features & BTA_HF_CLIENT_FEAT_CODEC) sdp_features |= 0x0020;
155
156 UINT16_TO_BE_FIELD(buf, sdp_features);
157 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
158 UINT_DESC_TYPE, 2, buf);
159
160 /* add browse group list */
161 result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1,
162 browse_list);
163
164 return result;
165 }
166
167 /*******************************************************************************
168 *
169 * Function bta_hf_client_create_record
170 *
171 * Description Create SDP record for registered service.
172 *
173 *
174 * Returns void
175 *
176 ******************************************************************************/
bta_hf_client_create_record(tBTA_HF_CLIENT_CB_ARR * client_cb_arr,const char * p_service_name)177 void bta_hf_client_create_record(tBTA_HF_CLIENT_CB_ARR* client_cb_arr,
178 const char* p_service_name) {
179 /* add sdp record if not already registered */
180 if (client_cb_arr->sdp_handle == 0) {
181 client_cb_arr->sdp_handle = SDP_CreateRecord();
182 client_cb_arr->scn = BTM_AllocateSCN();
183 bta_hf_client_add_record(p_service_name, client_cb_arr->scn,
184 client_cb_arr->features,
185 client_cb_arr->sdp_handle);
186
187 bta_sys_add_uuid(UUID_SERVCLASS_HF_HANDSFREE);
188 }
189 }
190
191 /*******************************************************************************
192 *
193 * Function bta_hf_client_del_record
194 *
195 * Description Delete SDP record for registered service.
196 *
197 *
198 * Returns void
199 *
200 ******************************************************************************/
bta_hf_client_del_record(tBTA_HF_CLIENT_CB_ARR * client_cb)201 void bta_hf_client_del_record(tBTA_HF_CLIENT_CB_ARR* client_cb) {
202 APPL_TRACE_DEBUG("%s", __func__);
203
204 if (client_cb->sdp_handle != 0) {
205 SDP_DeleteRecord(client_cb->sdp_handle);
206 client_cb->sdp_handle = 0;
207 BTM_FreeSCN(client_cb->scn);
208 BTM_SecClrService(BTM_SEC_SERVICE_HF_HANDSFREE);
209 bta_sys_remove_uuid(UUID_SERVCLASS_HF_HANDSFREE);
210 }
211 }
212
213 /*******************************************************************************
214 *
215 * Function bta_hf_client_sdp_find_attr
216 *
217 * Description Process SDP discovery results to find requested attribute
218 *
219 *
220 * Returns true if results found, false otherwise.
221 *
222 ******************************************************************************/
bta_hf_client_sdp_find_attr(tBTA_HF_CLIENT_CB * client_cb)223 bool bta_hf_client_sdp_find_attr(tBTA_HF_CLIENT_CB* client_cb) {
224 tSDP_DISC_REC* p_rec = NULL;
225 tSDP_DISC_ATTR* p_attr;
226 tSDP_PROTOCOL_ELEM pe;
227 bool result = false;
228
229 client_cb->peer_version = HFP_VERSION_1_1; /* Default version */
230
231 /* loop through all records we found */
232 while (true) {
233 /* get next record; if none found, we're done */
234 p_rec = SDP_FindServiceInDb(client_cb->p_disc_db,
235 UUID_SERVCLASS_AG_HANDSFREE, p_rec);
236 if (p_rec == NULL) {
237 break;
238 }
239
240 /* get scn from proto desc list if initiator */
241 if (client_cb->role == BTA_HF_CLIENT_INT) {
242 if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) {
243 client_cb->peer_scn = (uint8_t)pe.params[0];
244 } else {
245 continue;
246 }
247 }
248
249 /* get profile version (if failure, version parameter is not updated) */
250 SDP_FindProfileVersionInRec(p_rec, UUID_SERVCLASS_HF_HANDSFREE,
251 &client_cb->peer_version);
252
253 /* get features */
254 p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES);
255 if (p_attr != NULL) {
256 /* Found attribute. Get value. */
257 /* There might be race condition between SDP and BRSF. */
258 /* Do not update if we already received BRSF. */
259 if (client_cb->peer_features == 0) {
260 client_cb->peer_features = p_attr->attr_value.v.u16;
261
262 /* SDP and BRSF WBS bit are different, correct it if set */
263 if (client_cb->peer_features & 0x0020) {
264 client_cb->peer_features &= ~0x0020;
265 client_cb->peer_features |= BTA_HF_CLIENT_PEER_CODEC;
266 }
267
268 /* get network for ability to reject calls */
269 p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_NETWORK);
270 if (p_attr != NULL) {
271 if (p_attr->attr_value.v.u16 == 0x01) {
272 client_cb->peer_features |= BTA_HF_CLIENT_PEER_REJECT;
273 }
274 }
275 }
276 }
277
278 /* found what we needed */
279 result = true;
280 break;
281 }
282
283 APPL_TRACE_DEBUG("%s: peer_version=0x%x peer_features=0x%x", __func__,
284 client_cb->peer_version, client_cb->peer_features);
285
286 return result;
287 }
288
289 /*******************************************************************************
290 *
291 * Function bta_hf_client_do_disc
292 *
293 * Description Do service discovery.
294 *
295 *
296 * Returns void
297 *
298 ******************************************************************************/
bta_hf_client_do_disc(tBTA_HF_CLIENT_CB * client_cb)299 void bta_hf_client_do_disc(tBTA_HF_CLIENT_CB* client_cb) {
300 Uuid uuid_list[1];
301 uint16_t num_uuid = 1;
302 uint16_t attr_list[4];
303 uint8_t num_attr;
304 bool db_inited = false;
305
306 /* initiator; get proto list and features */
307 if (client_cb->role == BTA_HF_CLIENT_INT) {
308 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
309 attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
310 attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
311 attr_list[3] = ATTR_ID_SUPPORTED_FEATURES;
312 num_attr = 4;
313 uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_AG_HANDSFREE);
314 }
315 /* acceptor; get features */
316 else {
317 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
318 attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST;
319 attr_list[2] = ATTR_ID_SUPPORTED_FEATURES;
320 num_attr = 3;
321 uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_AG_HANDSFREE);
322 }
323
324 /* allocate buffer for sdp database */
325 client_cb->p_disc_db = (tSDP_DISCOVERY_DB*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
326
327 /* set up service discovery database; attr happens to be attr_list len */
328 db_inited = SDP_InitDiscoveryDb(client_cb->p_disc_db, BT_DEFAULT_BUFFER_SIZE,
329 num_uuid, uuid_list, num_attr, attr_list);
330
331 if (db_inited) {
332 /*Service discovery not initiated */
333 db_inited = SDP_ServiceSearchAttributeRequest2(
334 client_cb->peer_addr, client_cb->p_disc_db, bta_hf_client_sdp_cback,
335 (void*)client_cb);
336 }
337
338 if (!db_inited) {
339 /*free discover db */
340 osi_free_and_reset((void**)&client_cb->p_disc_db);
341 /* sent failed event */
342 tBTA_HF_CLIENT_DATA msg;
343 msg.hdr.layer_specific = client_cb->handle;
344 bta_hf_client_sm_execute(BTA_HF_CLIENT_DISC_FAIL_EVT, &msg);
345 }
346 }
347
348 /*******************************************************************************
349 *
350 * Function bta_hf_client_free_db
351 *
352 * Description Free discovery database.
353 *
354 *
355 * Returns void
356 *
357 ******************************************************************************/
bta_hf_client_free_db(tBTA_HF_CLIENT_DATA * p_data)358 void bta_hf_client_free_db(tBTA_HF_CLIENT_DATA* p_data) {
359 CHECK(p_data != NULL);
360 tBTA_HF_CLIENT_CB* client_cb =
361 bta_hf_client_find_cb_by_handle(p_data->hdr.layer_specific);
362 if (client_cb == NULL) {
363 APPL_TRACE_ERROR("%s: cb not found for handle %d", __func__,
364 p_data->hdr.layer_specific);
365 return;
366 }
367
368 osi_free_and_reset((void**)&client_cb->p_disc_db);
369 }
370