1 /******************************************************************************
2 *
3 * Copyright 2003-2016 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 * AVRCP SDP related functions
22 *
23 ******************************************************************************/
24 #include <string.h>
25
26 #include "avrc_api.h"
27 #include "avrc_int.h"
28 #include "bt_common.h"
29
30 using bluetooth::Uuid;
31
32 /*****************************************************************************
33 * Global data
34 ****************************************************************************/
35 tAVRC_CB avrc_cb;
36 static uint16_t a2dp_attr_list_sdp[] = {
37 ATTR_ID_SERVICE_CLASS_ID_LIST, /* update A2DP_NUM_ATTR, if changed */
38 ATTR_ID_BT_PROFILE_DESC_LIST, ATTR_ID_SUPPORTED_FEATURES,
39 ATTR_ID_SERVICE_NAME, ATTR_ID_PROTOCOL_DESC_LIST,
40 ATTR_ID_PROVIDER_NAME};
41
42 /******************************************************************************
43 *
44 * Function avrc_sdp_cback
45 *
46 * Description This is the SDP callback function used by A2DP_FindService.
47 * This function will be executed by SDP when the service
48 * search is completed. If the search is successful, it
49 * finds the first record in the database that matches the
50 * UUID of the search. Then retrieves various parameters
51 * from the record. When it is finished it calls the
52 * application callback function.
53 *
54 * Returns Nothing.
55 *
56 *****************************************************************************/
avrc_sdp_cback(uint16_t status)57 static void avrc_sdp_cback(uint16_t status) {
58 AVRC_TRACE_API("%s status: %d", __func__, status);
59
60 /* reset service_uuid, so can start another find service */
61 avrc_cb.service_uuid = 0;
62
63 /* return info from sdp record in app callback function */
64 avrc_cb.find_cback.Run(status);
65
66 return;
67 }
68
69 /******************************************************************************
70 *
71 * Function AVRC_FindService
72 *
73 * Description This function is called by the application to perform
74 * service discovery and retrieve AVRCP SDP record information
75 * from a peer device. Information is returned for the first
76 * service record found on the server that matches the service
77 * UUID. The callback function will be executed when service
78 * discovery is complete. There can only be one outstanding
79 * call to AVRC_FindService() at a time; the application must
80 * wait for the callback before it makes another call to the
81 * function. The application is responsible for allocating
82 * memory for the discovery database. It is recommended that
83 * the size of the discovery database be at least 300 bytes.
84 * The application can deallocate the memory after the
85 * callback function has executed.
86 *
87 * Input Parameters:
88 * service_uuid: Indicates
89 * TG(UUID_SERVCLASS_AV_REM_CTRL_TARGET)
90 * r CT(UUID_SERVCLASS_AV_REMOTE_CONTROL)
91 *
92 * bd_addr: BD address of the peer device.
93 *
94 * p_db: SDP discovery database parameters.
95 *
96 * p_cback: Pointer to the callback function.
97 *
98 * Output Parameters:
99 * None.
100 *
101 * Returns AVRC_SUCCESS if successful.
102 * AVRC_BAD_PARAMS if discovery database parameters are
103 * invalid.
104 * AVRC_NO_RESOURCES if there are not enough resources to
105 * perform the service search.
106 *
107 *****************************************************************************/
AVRC_FindService(uint16_t service_uuid,const RawAddress & bd_addr,tAVRC_SDP_DB_PARAMS * p_db,const tAVRC_FIND_CBACK & find_cback)108 uint16_t AVRC_FindService(uint16_t service_uuid, const RawAddress& bd_addr,
109 tAVRC_SDP_DB_PARAMS* p_db,
110 const tAVRC_FIND_CBACK& find_cback) {
111 bool result = true;
112
113 AVRC_TRACE_API("%s uuid: %x", __func__, service_uuid);
114 if ((service_uuid != UUID_SERVCLASS_AV_REM_CTRL_TARGET &&
115 service_uuid != UUID_SERVCLASS_AV_REMOTE_CONTROL) ||
116 p_db == NULL || p_db->p_db == NULL || find_cback.is_null())
117 return AVRC_BAD_PARAM;
118
119 /* check if it is busy */
120 if (avrc_cb.service_uuid == UUID_SERVCLASS_AV_REM_CTRL_TARGET ||
121 avrc_cb.service_uuid == UUID_SERVCLASS_AV_REMOTE_CONTROL)
122 return AVRC_NO_RESOURCES;
123
124
125 if (p_db->p_attrs == NULL || p_db->num_attr == 0) {
126 p_db->p_attrs = a2dp_attr_list_sdp;
127 p_db->num_attr = AVRC_NUM_ATTR;
128 }
129
130 Uuid uuid_list = Uuid::From16Bit(service_uuid);
131 result = SDP_InitDiscoveryDb(p_db->p_db, p_db->db_len, 1, &uuid_list,
132 p_db->num_attr, p_db->p_attrs);
133
134 if (result) {
135 /* store service_uuid and discovery db pointer */
136 avrc_cb.p_db = p_db->p_db;
137 avrc_cb.service_uuid = service_uuid;
138 avrc_cb.find_cback = find_cback;
139
140 /* perform service search */
141 result =
142 SDP_ServiceSearchAttributeRequest(bd_addr, p_db->p_db, avrc_sdp_cback);
143 }
144
145 return (result ? AVRC_SUCCESS : AVRC_FAIL);
146 }
147
148 /******************************************************************************
149 *
150 * Function AVRC_AddRecord
151 *
152 * Description This function is called to build an AVRCP SDP record.
153 * Prior to calling this function the application must
154 * call SDP_CreateRecord() to create an SDP record.
155 *
156 * Input Parameters:
157 * service_uuid: Indicates
158 * TG(UUID_SERVCLASS_AV_REM_CTRL_TARGET)
159 * or CT(UUID_SERVCLASS_AV_REMOTE_CONTROL)
160 *
161 * p_service_name: Pointer to a null-terminated character
162 * string containing the service name.
163 * If service name is not used set this to NULL.
164 *
165 * p_provider_name: Pointer to a null-terminated character
166 * string containing the provider name.
167 * If provider name is not used set this to NULL.
168 *
169 * categories: Supported categories.
170 *
171 * sdp_handle: SDP handle returned by SDP_CreateRecord().
172 *
173 * browse_supported: browse support info.
174 *
175 * profile_version: profile version of avrcp record.
176 *
177 * Output Parameters:
178 * None.
179 *
180 * Returns AVRC_SUCCESS if successful.
181 * AVRC_NO_RESOURCES if not enough resources to build the SDP
182 * record.
183 *
184 *****************************************************************************/
AVRC_AddRecord(uint16_t service_uuid,const char * p_service_name,const char * p_provider_name,uint16_t categories,uint32_t sdp_handle,bool browse_supported,uint16_t profile_version)185 uint16_t AVRC_AddRecord(uint16_t service_uuid, const char* p_service_name,
186 const char* p_provider_name, uint16_t categories,
187 uint32_t sdp_handle, bool browse_supported,
188 uint16_t profile_version) {
189 uint16_t browse_list[1];
190 bool result = true;
191 uint8_t temp[8];
192 uint8_t* p;
193 uint16_t count = 1;
194 uint8_t index = 0;
195 uint16_t class_list[2];
196
197 AVRC_TRACE_API("%s uuid: %x", __func__, service_uuid);
198
199 if (service_uuid != UUID_SERVCLASS_AV_REM_CTRL_TARGET &&
200 service_uuid != UUID_SERVCLASS_AV_REMOTE_CONTROL)
201 return AVRC_BAD_PARAM;
202
203 /* add service class id list */
204 class_list[0] = service_uuid;
205 if ((service_uuid == UUID_SERVCLASS_AV_REMOTE_CONTROL) &&
206 (profile_version > AVRC_REV_1_3)) {
207 class_list[1] = UUID_SERVCLASS_AV_REM_CTRL_CONTROL;
208 count = 2;
209 }
210 result &= SDP_AddServiceClassIdList(sdp_handle, count, class_list);
211
212 uint16_t protocol_reported_version;
213 /* AVRCP versions 1.3 to 1.5 report (version - 1) in the protocol
214 descriptor list. Oh, and 1.6 and 1.6.1 report version 1.4.
215 /because-we-smart */
216 if (profile_version < AVRC_REV_1_6) {
217 protocol_reported_version = profile_version - 1;
218 } else {
219 protocol_reported_version = AVCT_REV_1_4;
220 }
221
222 /* add protocol descriptor list */
223 tSDP_PROTOCOL_ELEM avrc_proto_desc_list[AVRC_NUM_PROTO_ELEMS];
224 avrc_proto_desc_list[0].num_params = 1;
225 avrc_proto_desc_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
226 avrc_proto_desc_list[0].params[0] = AVCT_PSM;
227 avrc_proto_desc_list[0].params[1] = 0;
228 for (index = 1; index < AVRC_NUM_PROTO_ELEMS; index++) {
229 avrc_proto_desc_list[index].num_params = 1;
230 avrc_proto_desc_list[index].protocol_uuid = UUID_PROTOCOL_AVCTP;
231 avrc_proto_desc_list[index].params[0] = protocol_reported_version;
232 avrc_proto_desc_list[index].params[1] = 0;
233 }
234 result &= SDP_AddProtocolList(sdp_handle, AVRC_NUM_PROTO_ELEMS,
235 &avrc_proto_desc_list[0]);
236
237 /* additional protocal descriptor, required only for version > 1.3 */
238 if ((profile_version > AVRC_REV_1_3) && (browse_supported)) {
239 tSDP_PROTO_LIST_ELEM avrc_add_proto_desc_list;
240 avrc_add_proto_desc_list.num_elems = 2;
241 avrc_add_proto_desc_list.list_elem[0].num_params = 1;
242 avrc_add_proto_desc_list.list_elem[0].protocol_uuid = UUID_PROTOCOL_L2CAP;
243 avrc_add_proto_desc_list.list_elem[0].params[0] = AVCT_BR_PSM;
244 avrc_add_proto_desc_list.list_elem[0].params[1] = 0;
245 avrc_add_proto_desc_list.list_elem[1].num_params = 1;
246 avrc_add_proto_desc_list.list_elem[1].protocol_uuid = UUID_PROTOCOL_AVCTP;
247 avrc_add_proto_desc_list.list_elem[1].params[0] = protocol_reported_version;
248 avrc_add_proto_desc_list.list_elem[1].params[1] = 0;
249
250 result &=
251 SDP_AddAdditionProtoLists(sdp_handle, 1, &avrc_add_proto_desc_list);
252 }
253 /* add profile descriptor list */
254 result &= SDP_AddProfileDescriptorList(
255 sdp_handle, UUID_SERVCLASS_AV_REMOTE_CONTROL, profile_version);
256
257 /* add supported categories */
258 p = temp;
259 UINT16_TO_BE_STREAM(p, categories);
260 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES,
261 UINT_DESC_TYPE, (uint32_t)2, (uint8_t*)temp);
262
263 /* add provider name */
264 if (p_provider_name != NULL) {
265 result &= SDP_AddAttribute(
266 sdp_handle, ATTR_ID_PROVIDER_NAME, TEXT_STR_DESC_TYPE,
267 (uint32_t)(strlen(p_provider_name) + 1), (uint8_t*)p_provider_name);
268 }
269
270 /* add service name */
271 if (p_service_name != NULL) {
272 result &= SDP_AddAttribute(
273 sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE,
274 (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name);
275 }
276
277 /* add browse group list */
278 browse_list[0] = UUID_SERVCLASS_PUBLIC_BROWSE_GROUP;
279 result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1,
280 browse_list);
281
282 return (result ? AVRC_SUCCESS : AVRC_FAIL);
283 }
284
285 /******************************************************************************
286 *
287 * Function AVRC_SetTraceLevel
288 *
289 * Description Sets the trace level for AVRC. If 0xff is passed, the
290 * current trace level is returned.
291 *
292 * Input Parameters:
293 * new_level: The level to set the AVRC tracing to:
294 * 0xff-returns the current setting.
295 * 0-turns off tracing.
296 * >= 1-Errors.
297 * >= 2-Warnings.
298 * >= 3-APIs.
299 * >= 4-Events.
300 * >= 5-Debug.
301 *
302 * Returns The new trace level or current trace level if
303 * the input parameter is 0xff.
304 *
305 *****************************************************************************/
AVRC_SetTraceLevel(uint8_t new_level)306 uint8_t AVRC_SetTraceLevel(uint8_t new_level) {
307 if (new_level != 0xFF) avrc_cb.trace_level = new_level;
308
309 return (avrc_cb.trace_level);
310 }
311
312 /*******************************************************************************
313 *
314 * Function AVRC_Init
315 *
316 * Description This function is called at stack startup to allocate the
317 * control block (if using dynamic memory), and initializes the
318 * control block and tracing level.
319 *
320 * Returns void
321 *
322 ******************************************************************************/
AVRC_Init(void)323 void AVRC_Init(void) {
324 memset(&avrc_cb, 0, sizeof(tAVRC_CB));
325
326 #if defined(AVRC_INITIAL_TRACE_LEVEL)
327 avrc_cb.trace_level = AVRC_INITIAL_TRACE_LEVEL;
328 #else
329 avrc_cb.trace_level = BT_TRACE_LEVEL_NONE;
330 #endif
331 }
332