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 28 #include "bt_common.h" 29 #include "bta_ag_api.h" 30 #include "bta_ag_int.h" 31 #include "bta_api.h" 32 #include "bta_sys.h" 33 #include "btm_api.h" 34 #include "osi/include/osi.h" 35 #include "sdp_api.h" 36 #include "utl.h" 37 38 /* Number of protocol elements in protocol element list. */ 39 #define BTA_AG_NUM_PROTO_ELEMS 2 40 41 /* Number of elements in service class id list. */ 42 #define BTA_AG_NUM_SVC_ELEMS 2 43 44 /* size of database for service discovery */ 45 #ifndef BTA_AG_DISC_BUF_SIZE 46 #define BTA_AG_DISC_BUF_SIZE BT_DEFAULT_BUFFER_SIZE 47 #endif 48 49 /* declare sdp callback functions */ 50 void bta_ag_sdp_cback_1(uint16_t status); 51 void bta_ag_sdp_cback_2(uint16_t status); 52 void bta_ag_sdp_cback_3(uint16_t status); 53 54 /* SDP callback function table */ 55 typedef tSDP_DISC_CMPL_CB* tBTA_AG_SDP_CBACK; 56 const tBTA_AG_SDP_CBACK bta_ag_sdp_cback_tbl[] = { 57 bta_ag_sdp_cback_1, bta_ag_sdp_cback_2, bta_ag_sdp_cback_3}; 58 59 /******************************************************************************* 60 * 61 * Function bta_ag_sdp_cback 62 * 63 * Description SDP callback function. 64 * 65 * 66 * Returns void 67 * 68 ******************************************************************************/ 69 static void bta_ag_sdp_cback(uint16_t status, uint8_t idx) { 70 uint16_t event; 71 tBTA_AG_SCB* p_scb; 72 73 APPL_TRACE_DEBUG("%s status:0x%x", __func__, status); 74 75 p_scb = bta_ag_scb_by_idx(idx); 76 if (p_scb != NULL) { 77 /* set event according to int/acp */ 78 if (p_scb->role == BTA_AG_ACP) { 79 event = BTA_AG_DISC_ACP_RES_EVT; 80 } else { 81 event = BTA_AG_DISC_INT_RES_EVT; 82 } 83 84 tBTA_AG_DISC_RESULT* p_buf = 85 (tBTA_AG_DISC_RESULT*)osi_malloc(sizeof(tBTA_AG_DISC_RESULT)); 86 p_buf->hdr.event = event; 87 p_buf->hdr.layer_specific = idx; 88 p_buf->status = status; 89 bta_sys_sendmsg(p_buf); 90 } 91 } 92 93 /******************************************************************************* 94 * 95 * Function bta_ag_sdp_cback_1 to 3 96 * 97 * Description SDP callback functions. Since there is no way to 98 * distinguish scb from the callback we need separate 99 * callbacks for each scb. 100 * 101 * 102 * Returns void 103 * 104 ******************************************************************************/ 105 void bta_ag_sdp_cback_1(uint16_t status) { bta_ag_sdp_cback(status, 1); } 106 void bta_ag_sdp_cback_2(uint16_t status) { bta_ag_sdp_cback(status, 2); } 107 void bta_ag_sdp_cback_3(uint16_t status) { bta_ag_sdp_cback(status, 3); } 108 109 /****************************************************************************** 110 * 111 * Function bta_ag_add_record 112 * 113 * Description This function is called by a server application to add 114 * HSP or HFP information to an SDP record. Prior to 115 * calling this function the application must call 116 * SDP_CreateRecord() to create an SDP record. 117 * 118 * Returns true if function execution succeeded, 119 * false if function execution failed. 120 * 121 *****************************************************************************/ 122 bool bta_ag_add_record(uint16_t service_uuid, char* p_service_name, uint8_t scn, 123 tBTA_AG_FEAT features, uint32_t sdp_handle) { 124 tSDP_PROTOCOL_ELEM proto_elem_list[BTA_AG_NUM_PROTO_ELEMS]; 125 uint16_t svc_class_id_list[BTA_AG_NUM_SVC_ELEMS]; 126 uint16_t browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP}; 127 uint16_t version; 128 uint16_t profile_uuid; 129 uint8_t network; 130 bool result = true; 131 bool codec_supported = false; 132 uint8_t buf[2]; 133 134 APPL_TRACE_DEBUG("%s uuid: %x", __func__, service_uuid); 135 136 memset(proto_elem_list, 0, 137 BTA_AG_NUM_PROTO_ELEMS * sizeof(tSDP_PROTOCOL_ELEM)); 138 139 /* add the protocol element sequence */ 140 proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP; 141 proto_elem_list[0].num_params = 0; 142 proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM; 143 proto_elem_list[1].num_params = 1; 144 proto_elem_list[1].params[0] = scn; 145 result &= 146 SDP_AddProtocolList(sdp_handle, BTA_AG_NUM_PROTO_ELEMS, proto_elem_list); 147 148 /* add service class id list */ 149 svc_class_id_list[0] = service_uuid; 150 svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO; 151 result &= SDP_AddServiceClassIdList(sdp_handle, BTA_AG_NUM_SVC_ELEMS, 152 svc_class_id_list); 153 154 /* add profile descriptor list */ 155 if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE) { 156 profile_uuid = UUID_SERVCLASS_HF_HANDSFREE; 157 version = BTA_HFP_VERSION; 158 } else { 159 profile_uuid = UUID_SERVCLASS_HEADSET; 160 version = HSP_VERSION_1_2; 161 } 162 result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version); 163 164 /* add service name */ 165 if (p_service_name != NULL && p_service_name[0] != 0) { 166 result &= SDP_AddAttribute( 167 sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE, 168 (uint32_t)(strlen(p_service_name) + 1), (uint8_t*)p_service_name); 169 } 170 171 /* add features and network */ 172 if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE) { 173 network = (features & BTA_AG_FEAT_REJECT) ? 1 : 0; 174 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_DATA_STORES_OR_NETWORK, 175 UINT_DESC_TYPE, 1, &network); 176 177 if (features & BTA_AG_FEAT_CODEC) codec_supported = true; 178 179 features &= BTA_AG_SDP_FEAT_SPEC; 180 181 /* Codec bit position is different in SDP and in BRSF */ 182 if (codec_supported) features |= 0x0020; 183 184 UINT16_TO_BE_FIELD(buf, features); 185 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, 186 UINT_DESC_TYPE, 2, buf); 187 } 188 189 /* add browse group list */ 190 result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, 191 browse_list); 192 193 return result; 194 } 195 196 /******************************************************************************* 197 * 198 * Function bta_ag_create_records 199 * 200 * Description Create SDP records for registered services. 201 * 202 * 203 * Returns void 204 * 205 ******************************************************************************/ 206 void bta_ag_create_records(tBTA_AG_SCB* p_scb, tBTA_AG_DATA* p_data) { 207 int i; 208 tBTA_SERVICE_MASK services; 209 210 services = p_scb->reg_services >> BTA_HSP_SERVICE_ID; 211 for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1) { 212 /* if service is set in mask */ 213 if (services & 1) { 214 /* add sdp record if not already registered */ 215 if (bta_ag_cb.profile[i].sdp_handle == 0) { 216 bta_ag_cb.profile[i].sdp_handle = SDP_CreateRecord(); 217 bta_ag_cb.profile[i].scn = BTM_AllocateSCN(); 218 bta_ag_add_record(bta_ag_uuid[i], p_data->api_register.p_name[i], 219 bta_ag_cb.profile[i].scn, 220 p_data->api_register.features, 221 bta_ag_cb.profile[i].sdp_handle); 222 bta_sys_add_uuid(bta_ag_uuid[i]); 223 } 224 } 225 } 226 227 p_scb->hsp_version = HSP_VERSION_1_2; 228 } 229 230 /******************************************************************************* 231 * 232 * Function bta_ag_del_records 233 * 234 * Description Delete SDP records for any registered services. 235 * 236 * 237 * Returns void 238 * 239 ******************************************************************************/ 240 void bta_ag_del_records(tBTA_AG_SCB* p_scb, UNUSED_ATTR tBTA_AG_DATA* p_data) { 241 tBTA_AG_SCB* p = &bta_ag_cb.scb[0]; 242 tBTA_SERVICE_MASK services; 243 tBTA_SERVICE_MASK others = 0; 244 int i; 245 246 /* get services of all other registered servers */ 247 for (i = 0; i < BTA_AG_NUM_IDX; i++, p++) { 248 if (p_scb == p) { 249 continue; 250 } 251 252 if (p->in_use && p->dealloc == false) { 253 others |= p->reg_services; 254 } 255 } 256 257 others >>= BTA_HSP_SERVICE_ID; 258 services = p_scb->reg_services >> BTA_HSP_SERVICE_ID; 259 for (i = 0; i < BTA_AG_NUM_IDX && services != 0; 260 i++, services >>= 1, others >>= 1) { 261 /* if service registered for this scb and not registered for any other scb 262 */ 263 if (((services & 1) == 1) && ((others & 1) == 0)) { 264 APPL_TRACE_DEBUG("bta_ag_del_records %d", i); 265 if (bta_ag_cb.profile[i].sdp_handle != 0) { 266 SDP_DeleteRecord(bta_ag_cb.profile[i].sdp_handle); 267 bta_ag_cb.profile[i].sdp_handle = 0; 268 } 269 BTM_FreeSCN(bta_ag_cb.profile[i].scn); 270 BTM_SecClrService(bta_ag_sec_id[i]); 271 bta_sys_remove_uuid(bta_ag_uuid[i]); 272 } 273 } 274 } 275 276 /******************************************************************************* 277 * 278 * Function bta_ag_sdp_find_attr 279 * 280 * Description Process SDP discovery results to find requested attributes 281 * for requested service. 282 * 283 * 284 * Returns true if results found, false otherwise. 285 * 286 ******************************************************************************/ 287 bool bta_ag_sdp_find_attr(tBTA_AG_SCB* p_scb, tBTA_SERVICE_MASK service) { 288 tSDP_DISC_REC* p_rec = NULL; 289 tSDP_DISC_ATTR* p_attr; 290 tSDP_PROTOCOL_ELEM pe; 291 uint16_t uuid; 292 bool result = false; 293 294 if (service & BTA_HFP_SERVICE_MASK) { 295 uuid = UUID_SERVCLASS_HF_HANDSFREE; 296 p_scb->peer_version = HFP_VERSION_1_1; /* Default version */ 297 } else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT) { 298 uuid = UUID_SERVCLASS_HEADSET_HS; 299 p_scb->peer_version = HSP_VERSION_1_2; /* Default version */ 300 } else { 301 return result; 302 } 303 304 /* loop through all records we found */ 305 while (true) { 306 /* get next record; if none found, we're done */ 307 p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec); 308 if (p_rec == NULL) { 309 if (uuid == UUID_SERVCLASS_HEADSET_HS) { 310 /* Search again in case the peer device uses the old HSP UUID */ 311 uuid = UUID_SERVCLASS_HEADSET; 312 p_scb->peer_version = HSP_VERSION_1_0; 313 p_rec = SDP_FindServiceInDb(p_scb->p_disc_db, uuid, p_rec); 314 if (p_rec == NULL) { 315 break; 316 } 317 } else 318 break; 319 } 320 321 /* get scn from proto desc list if initiator */ 322 if (p_scb->role == BTA_AG_INT) { 323 if (SDP_FindProtocolListElemInRec(p_rec, UUID_PROTOCOL_RFCOMM, &pe)) { 324 p_scb->peer_scn = (uint8_t)pe.params[0]; 325 } else { 326 continue; 327 } 328 } 329 330 /* get profile version (if failure, version parameter is not updated) */ 331 if (!SDP_FindProfileVersionInRec(p_rec, uuid, &p_scb->peer_version)) { 332 APPL_TRACE_WARNING("%s: Get peer_version failed, using default 0x%04x", 333 __func__, p_scb->peer_version); 334 } 335 336 /* get features if HFP */ 337 if (service & BTA_HFP_SERVICE_MASK) { 338 p_attr = SDP_FindAttributeInRec(p_rec, ATTR_ID_SUPPORTED_FEATURES); 339 if (p_attr != NULL) { 340 /* Found attribute. Get value. */ 341 /* There might be race condition between SDP and BRSF. */ 342 /* Do not update if we already received BRSF. */ 343 if (p_scb->peer_features == 0) 344 p_scb->peer_features = p_attr->attr_value.v.u16; 345 } 346 } else /* HSP */ 347 { 348 p_attr = 349 SDP_FindAttributeInRec(p_rec, ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL); 350 if (p_attr != NULL) { 351 /* Remote volume control of HSP */ 352 if (p_attr->attr_value.v.u8) 353 p_scb->peer_features |= BTA_AG_PEER_FEAT_VOL; 354 else 355 p_scb->peer_features &= ~BTA_AG_PEER_FEAT_VOL; 356 } 357 } 358 359 /* found what we needed */ 360 result = true; 361 break; 362 } 363 return result; 364 } 365 366 /******************************************************************************* 367 * 368 * Function bta_ag_do_disc 369 * 370 * Description Do service discovery. 371 * 372 * 373 * Returns void 374 * 375 ******************************************************************************/ 376 void bta_ag_do_disc(tBTA_AG_SCB* p_scb, tBTA_SERVICE_MASK service) { 377 tSDP_UUID uuid_list[1]; 378 uint16_t num_uuid = 1; 379 uint16_t attr_list[4]; 380 uint8_t num_attr; 381 bool db_inited = false; 382 383 /* HFP initiator; get proto list and features */ 384 if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_INT) { 385 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; 386 attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST; 387 attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST; 388 attr_list[3] = ATTR_ID_SUPPORTED_FEATURES; 389 num_attr = 4; 390 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE; 391 } 392 /* HFP acceptor; get features */ 393 else if (service & BTA_HFP_SERVICE_MASK && p_scb->role == BTA_AG_ACP) { 394 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; 395 attr_list[1] = ATTR_ID_BT_PROFILE_DESC_LIST; 396 attr_list[2] = ATTR_ID_SUPPORTED_FEATURES; 397 num_attr = 3; 398 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HF_HANDSFREE; 399 } 400 /* HSP initiator; get proto list */ 401 else if (service & BTA_HSP_SERVICE_MASK && p_scb->role == BTA_AG_INT) { 402 attr_list[0] = ATTR_ID_SERVICE_CLASS_ID_LIST; 403 attr_list[1] = ATTR_ID_PROTOCOL_DESC_LIST; 404 attr_list[2] = ATTR_ID_BT_PROFILE_DESC_LIST; 405 attr_list[3] = ATTR_ID_REMOTE_AUDIO_VOLUME_CONTROL; 406 num_attr = 4; 407 // Although UUID_SERVCLASS_HEADSET_HS (0x1131) is to be used in HSP 1.2, 408 // some HSP 1.2 implementations, such as PTS, still use 409 // UUID_SERVCLASS_HEADSET (0x1108) to store its service record. However, 410 // most of such devices are HSP 1.0 devices. 411 if (p_scb->hsp_version >= HSP_VERSION_1_2) { 412 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HEADSET_HS; 413 } else { 414 uuid_list[0].uu.uuid16 = UUID_SERVCLASS_HEADSET; 415 } 416 } 417 /* HSP acceptor; no discovery */ 418 else { 419 return; 420 } 421 422 /* allocate buffer for sdp database */ 423 p_scb->p_disc_db = (tSDP_DISCOVERY_DB*)osi_malloc(BTA_AG_DISC_BUF_SIZE); 424 /* set up service discovery database; attr happens to be attr_list len */ 425 uuid_list[0].len = LEN_UUID_16; 426 db_inited = SDP_InitDiscoveryDb(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE, 427 num_uuid, uuid_list, num_attr, attr_list); 428 429 if (db_inited) { 430 /*Service discovery not initiated */ 431 db_inited = SDP_ServiceSearchAttributeRequest( 432 p_scb->peer_addr, p_scb->p_disc_db, 433 bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]); 434 } 435 436 if (!db_inited) { 437 /*free discover db */ 438 bta_ag_free_db(p_scb, NULL); 439 /* sent failed event */ 440 bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, NULL); 441 } 442 } 443 444 /******************************************************************************* 445 * 446 * Function bta_ag_free_db 447 * 448 * Description Free discovery database. 449 * 450 * 451 * Returns void 452 * 453 ******************************************************************************/ 454 void bta_ag_free_db(tBTA_AG_SCB* p_scb, UNUSED_ATTR tBTA_AG_DATA* p_data) { 455 osi_free_and_reset((void**)&p_scb->p_disc_db); 456 } 457
