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 <cstdint>
28
29 #include "bta/hf_client/bta_hf_client_int.h"
30 #include "bta/include/bta_ag_api.h"
31 #include "bta/include/bta_hf_client_api.h"
32 #include "bta/sys/bta_sys.h"
33 #include "osi/include/allocator.h"
34 #include "osi/include/properties.h"
35 #include "stack/btm/btm_sec.h"
36 #include "stack/include/btm_api.h"
37 #include "stack/include/port_api.h"
38 #include "stack/include/sdpdefs.h"
39 #include "types/bluetooth/uuid.h"
40
41 using bluetooth::Uuid;
42
43 /* Number of protocol elements in protocol element list. */
44 #define BTA_HF_CLIENT_NUM_PROTO_ELEMS 2
45
46 /* Number of elements in service class id list. */
47 #define BTA_HF_CLIENT_NUM_SVC_ELEMS 2
48
49 /*******************************************************************************
50 *
51 * Function bta_hf_client_sdp_cback
52 *
53 * Description SDP callback function.
54 *
55 *
56 * Returns void
57 *
58 ******************************************************************************/
bta_hf_client_sdp_cback(tSDP_STATUS status,const void * data)59 static void bta_hf_client_sdp_cback(tSDP_STATUS status, const void* data) {
60 uint16_t event;
61 tBTA_HF_CLIENT_DISC_RESULT* p_buf = (tBTA_HF_CLIENT_DISC_RESULT*)osi_malloc(
62 sizeof(tBTA_HF_CLIENT_DISC_RESULT));
63
64 APPL_TRACE_DEBUG("bta_hf_client_sdp_cback status:0x%x", status);
65 tBTA_HF_CLIENT_CB* client_cb = (tBTA_HF_CLIENT_CB*)data;
66
67 /* set event according to int/acp */
68 if (client_cb->role == BTA_HF_CLIENT_ACP)
69 event = BTA_HF_CLIENT_DISC_ACP_RES_EVT;
70 else
71 event = BTA_HF_CLIENT_DISC_INT_RES_EVT;
72
73 p_buf->hdr.event = event;
74 p_buf->hdr.layer_specific = client_cb->handle;
75 p_buf->status = status;
76
77 bta_sys_sendmsg(p_buf);
78 }
79
80 /******************************************************************************
81 *
82 * Function bta_hf_client_add_record
83 *
84 * Description This function is called by a server application to add
85 * HFP Client information to an SDP record. Prior to
86 * calling this function the application must call
87 * SDP_CreateRecord() to create an SDP record.
88 *
89 * Returns true if function execution succeeded,
90 * false if function execution failed.
91 *
92 *****************************************************************************/
bta_hf_client_add_record(const char * p_service_name,uint8_t scn,tBTA_HF_CLIENT_FEAT features,uint32_t sdp_handle)93 bool bta_hf_client_add_record(const char* p_service_name, uint8_t scn,
94 tBTA_HF_CLIENT_FEAT features,
95 uint32_t sdp_handle) {
96 tSDP_PROTOCOL_ELEM proto_elem_list[BTA_HF_CLIENT_NUM_PROTO_ELEMS];
97 uint16_t svc_class_id_list[BTA_HF_CLIENT_NUM_SVC_ELEMS];
98 uint16_t browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP};
99 uint16_t version;
100 uint16_t profile_uuid;
101 bool result = true;
102 uint8_t buf[2];
103 uint16_t sdp_features = 0;
104
105 APPL_TRACE_DEBUG("bta_hf_client_add_record");
106
107 memset(proto_elem_list, 0,
108 BTA_HF_CLIENT_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM));
109
110 /* add the protocol element sequence */
111 proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
112 proto_elem_list[0].num_params = 0;
113 proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM;
114 proto_elem_list[1].num_params = 1;
115 proto_elem_list[1].params[0] = scn;
116 result &= SDP_AddProtocolList(sdp_handle, BTA_HF_CLIENT_NUM_PROTO_ELEMS,
117 proto_elem_list);
118
119 /* add service class id list */
120 svc_class_id_list[0] = UUID_SERVCLASS_HF_HANDSFREE;
121 svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO;
122 result &= SDP_AddServiceClassIdList(sdp_handle, BTA_HF_CLIENT_NUM_SVC_ELEMS,
123 svc_class_id_list);
124
125 /* add profile descriptor list */
126 profile_uuid = UUID_SERVCLASS_HF_HANDSFREE;
127 version = get_default_hfp_version();
128
129 result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version);
130
131 /* add service name */
132 if (p_service_name != NULL && p_service_name[0] != 0) {
133 result &= SDP_AddAttribute(
134 sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
135 (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name);
136 }
137
138 /* add features */
139 if (features & BTA_HF_CLIENT_FEAT_ECNR)
140 sdp_features |= BTA_HF_CLIENT_FEAT_ECNR;
141
142 if (features & BTA_HF_CLIENT_FEAT_3WAY)
143 sdp_features |= BTA_HF_CLIENT_FEAT_3WAY;
144
145 if (features & BTA_HF_CLIENT_FEAT_CLI) sdp_features |= BTA_HF_CLIENT_FEAT_CLI;
146
147 if (features & BTA_HF_CLIENT_FEAT_VREC)
148 sdp_features |= BTA_HF_CLIENT_FEAT_VREC;
149
150 if (features & BTA_HF_CLIENT_FEAT_VOL) sdp_features |= BTA_HF_CLIENT_FEAT_VOL;
151
152 /* Codec bit position is different in SDP (bit 5) and in BRSF (bit 7) */
153 if (features & BTA_HF_CLIENT_FEAT_CODEC) sdp_features |= 0x0020;
154
155 UINT16_TO_BE_FIELD(buf, sdp_features);
156 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
157 UINT_DESC_TYPE, 2, buf);
158
159 /* add browse group list */
160 result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1,
161 browse_list);
162
163 return result;
164 }
165
166 /*******************************************************************************
167 *
168 * Function bta_hf_client_create_record
169 *
170 * Description Create SDP record for registered service.
171 *
172 *
173 * Returns void
174 *
175 ******************************************************************************/
bta_hf_client_create_record(tBTA_HF_CLIENT_CB_ARR * client_cb_arr,const char * p_service_name)176 void bta_hf_client_create_record(tBTA_HF_CLIENT_CB_ARR* client_cb_arr,
177 const char* p_service_name) {
178 /* add sdp record if not already registered */
179 if (client_cb_arr->sdp_handle == 0) {
180 client_cb_arr->sdp_handle = SDP_CreateRecord();
181 client_cb_arr->scn = BTM_AllocateSCN();
182 bta_hf_client_add_record(p_service_name, client_cb_arr->scn,
183 client_cb_arr->features,
184 client_cb_arr->sdp_handle);
185
186 bta_sys_add_uuid(UUID_SERVCLASS_HF_HANDSFREE);
187 }
188 }
189
190 /*******************************************************************************
191 *
192 * Function bta_hf_client_del_record
193 *
194 * Description Delete SDP record for registered service.
195 *
196 *
197 * Returns void
198 *
199 ******************************************************************************/
bta_hf_client_del_record(tBTA_HF_CLIENT_CB_ARR * client_cb)200 void bta_hf_client_del_record(tBTA_HF_CLIENT_CB_ARR* client_cb) {
201 APPL_TRACE_DEBUG("%s", __func__);
202
203 if (client_cb->sdp_handle != 0) {
204 SDP_DeleteRecord(client_cb->sdp_handle);
205 client_cb->sdp_handle = 0;
206 BTM_FreeSCN(client_cb->scn);
207 bta_sys_remove_uuid(UUID_SERVCLASS_HF_HANDSFREE);
208 }
209 }
210
211 /*******************************************************************************
212 *
213 * Function bta_hf_client_sdp_find_attr
214 *
215 * Description Process SDP discovery results to find requested attribute
216 *
217 *
218 * Returns true if results found, false otherwise.
219 *
220 ******************************************************************************/
bta_hf_client_sdp_find_attr(tBTA_HF_CLIENT_CB * client_cb)221 bool bta_hf_client_sdp_find_attr(tBTA_HF_CLIENT_CB* client_cb) {
222 tSDP_DISC_REC* p_rec = NULL;
223 tSDP_DISC_ATTR* p_attr;
224 tSDP_PROTOCOL_ELEM pe;
225 bool result = false;
226
227 client_cb->peer_version = HFP_VERSION_1_1; /* Default version */
228
229 /* loop through all records we found */
230 while (true) {
231 /* get next record; if none found, we're done */
232 p_rec = SDP_FindServiceInDb(client_cb->p_disc_db,
233 UUID_SERVCLASS_AG_HANDSFREE, p_rec);
234 if (p_rec == NULL) {
235 break;
236 }
237
238 /* get scn from proto desc list if initiator */
239 if (client_cb->role == BTA_HF_CLIENT_INT) {
240 if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) {
241 client_cb->peer_scn = (uint8_t)pe.params[0];
242 } else {
243 continue;
244 }
245 }
246
247 /* get profile version (if failure, version parameter is not updated) */
248 SDP_FindProfileVersionInRec(p_rec, UUID_SERVCLASS_HF_HANDSFREE,
249 &client_cb->peer_version);
250
251 /* get features */
252 p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES);
253 if (p_attr != NULL &&
254 SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UINT_DESC_TYPE &&
255 SDP_DISC_ATTR_LEN(p_attr->attr_len_type) >= 2) {
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 SDP_DISC_ATTR_TYPE(p_attr->attr_len_type) == UINT_DESC_TYPE &&
272 SDP_DISC_ATTR_LEN(p_attr->attr_len_type) >= 2) {
273 if (p_attr->attr_value.v.u16 == 0x01) {
274 client_cb->peer_features |= BTA_HF_CLIENT_PEER_REJECT;
275 }
276 }
277 }
278 }
279
280 /* found what we needed */
281 result = true;
282 break;
283 }
284
285 APPL_TRACE_DEBUG("%s: peer_version=0x%x peer_features=0x%x", __func__,
286 client_cb->peer_version, client_cb->peer_features);
287
288 return result;
289 }
290
291 /*******************************************************************************
292 *
293 * Function bta_hf_client_do_disc
294 *
295 * Description Do service discovery.
296 *
297 *
298 * Returns void
299 *
300 ******************************************************************************/
bta_hf_client_do_disc(tBTA_HF_CLIENT_CB * client_cb)301 void bta_hf_client_do_disc(tBTA_HF_CLIENT_CB* client_cb) {
302 Uuid uuid_list[1];
303 uint16_t num_uuid = 1;
304 uint16_t attr_list[4];
305 uint8_t num_attr;
306 bool db_inited = false;
307
308 /* initiator; get proto list and features */
309 if (client_cb->role == BTA_HF_CLIENT_INT) {
310 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
311 attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST;
312 attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST;
313 attr_list[3] = ATTR_ID_SUPPORTED_FEATURES;
314 num_attr = 4;
315 uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_AG_HANDSFREE);
316 }
317 /* acceptor; get features */
318 else {
319 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST;
320 attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST;
321 attr_list[2] = ATTR_ID_SUPPORTED_FEATURES;
322 num_attr = 3;
323 uuid_list[0] = Uuid::From16Bit(UUID_SERVCLASS_AG_HANDSFREE);
324 }
325
326 /* allocate buffer for sdp database */
327 client_cb->p_disc_db = (tSDP_DISCOVERY_DB*)osi_malloc(BT_DEFAULT_BUFFER_SIZE);
328
329 /* set up service discovery database; attr happens to be attr_list len */
330 db_inited = SDP_InitDiscoveryDb(client_cb->p_disc_db, BT_DEFAULT_BUFFER_SIZE,
331 num_uuid, uuid_list, num_attr, attr_list);
332
333 if (db_inited) {
334 /*Service discovery not initiated */
335 db_inited = SDP_ServiceSearchAttributeRequest2(
336 client_cb->peer_addr, client_cb->p_disc_db, bta_hf_client_sdp_cback,
337 (void*)client_cb);
338 }
339
340 if (!db_inited) {
341 /*free discover db */
342 osi_free_and_reset((void**)&client_cb->p_disc_db);
343 /* sent failed event */
344 tBTA_HF_CLIENT_DATA msg;
345 msg.hdr.layer_specific = client_cb->handle;
346 bta_hf_client_sm_execute(BTA_HF_CLIENT_DISC_FAIL_EVT, &msg);
347 }
348 }
349
350 /*******************************************************************************
351 *
352 * Function bta_hf_client_free_db
353 *
354 * Description Free discovery database.
355 *
356 *
357 * Returns void
358 *
359 ******************************************************************************/
bta_hf_client_free_db(tBTA_HF_CLIENT_DATA * p_data)360 void bta_hf_client_free_db(tBTA_HF_CLIENT_DATA* p_data) {
361 CHECK(p_data != NULL);
362 tBTA_HF_CLIENT_CB* client_cb =
363 bta_hf_client_find_cb_by_handle(p_data->hdr.layer_specific);
364 if (client_cb == NULL) {
365 APPL_TRACE_ERROR("%s: cb not found for handle %d", __func__,
366 p_data->hdr.layer_specific);
367 return;
368 }
369
370 osi_free_and_reset((void**)&client_cb->p_disc_db);
371 }
372