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 *******************************************************************************/ 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 *******************************************************************************/ 111 void bta_ag_sdp_cback_1(UINT16 status) {bta_ag_sdp_cback(status, 1);} 112 void bta_ag_sdp_cback_2(UINT16 status) {bta_ag_sdp_cback(status, 2);} 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 ******************************************************************************/ 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 = BTA_HFP_VERSION; 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 *******************************************************************************/ 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 *******************************************************************************/ 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 *******************************************************************************/ 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 *******************************************************************************/ 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 *******************************************************************************/ 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
