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 "gki.h" 34 35 /* Number of protocol elements in protocol element list. */ 36 #define BTA_AG_NUM_PROTO_ELEMS 2 37 38 /* Number of elements in service class id list. */ 39 #define BTA_AG_NUM_SVC_ELEMS 2 40 41 /* size of database for service discovery */ 42 #ifndef BTA_AG_DISC_BUF_SIZE 43 #define BTA_AG_DISC_BUF_SIZE GKI_MAX_BUF_SIZE 44 #endif 45 46 /* declare sdp callback functions */ 47 void bta_ag_sdp_cback_1(UINT16 status); 48 void bta_ag_sdp_cback_2(UINT16 status); 49 void bta_ag_sdp_cback_3(UINT16 status); 50 51 /* SDP callback function table */ 52 typedef tSDP_DISC_CMPL_CB *tBTA_AG_SDP_CBACK; 53 const tBTA_AG_SDP_CBACK bta_ag_sdp_cback_tbl[] = 54 { 55 bta_ag_sdp_cback_1, 56 bta_ag_sdp_cback_2, 57 bta_ag_sdp_cback_3 58 }; 59 60 /******************************************************************************* 61 ** 62 ** Function bta_ag_sdp_cback 63 ** 64 ** Description SDP callback function. 65 ** 66 ** 67 ** Returns void 68 ** 69 *******************************************************************************/ 70 static void bta_ag_sdp_cback(UINT16 status, UINT8 idx) 71 { 72 tBTA_AG_DISC_RESULT *p_buf; 73 UINT16 event; 74 tBTA_AG_SCB *p_scb; 75 76 APPL_TRACE_DEBUG1("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 if ((p_buf = (tBTA_AG_DISC_RESULT *) GKI_getbuf(sizeof(tBTA_AG_DISC_RESULT))) != NULL) 91 { 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 ** 102 ** Function bta_ag_sdp_cback_1 to 3 103 ** 104 ** Description SDP callback functions. Since there is no way to 105 ** distinguish scb from the callback we need separate 106 ** callbacks for each scb. 107 ** 108 ** 109 ** Returns void 110 ** 111 *******************************************************************************/ 112 void bta_ag_sdp_cback_1(UINT16 status) {bta_ag_sdp_cback(status, 1);} 113 void bta_ag_sdp_cback_2(UINT16 status) {bta_ag_sdp_cback(status, 2);} 114 void bta_ag_sdp_cback_3(UINT16 status) {bta_ag_sdp_cback(status, 3);} 115 116 /****************************************************************************** 117 ** 118 ** Function bta_ag_add_record 119 ** 120 ** Description This function is called by a server application to add 121 ** HSP or HFP information to an SDP record. Prior to 122 ** calling this function the application must call 123 ** SDP_CreateRecord() to create an SDP record. 124 ** 125 ** Returns TRUE if function execution succeeded, 126 ** FALSE if function execution failed. 127 ** 128 ******************************************************************************/ 129 BOOLEAN bta_ag_add_record(UINT16 service_uuid, char *p_service_name, UINT8 scn, 130 tBTA_AG_FEAT features, UINT32 sdp_handle) 131 { 132 tSDP_PROTOCOL_ELEM proto_elem_list[BTA_AG_NUM_PROTO_ELEMS]; 133 UINT16 svc_class_id_list[BTA_AG_NUM_SVC_ELEMS]; 134 UINT16 browse_list[] = {UUID_SERVCLASS_PUBLIC_BROWSE_GROUP}; 135 UINT16 version; 136 UINT16 profile_uuid; 137 UINT8 network; 138 BOOLEAN result = TRUE; 139 BOOLEAN codec_supported = FALSE; 140 UINT8 buf[2]; 141 142 APPL_TRACE_DEBUG1("bta_ag_add_record uuid: %x", service_uuid); 143 144 memset( proto_elem_list, 0 , BTA_AG_NUM_PROTO_ELEMS*sizeof(tSDP_PROTOCOL_ELEM)); 145 146 /* add the protocol element sequence */ 147 proto_elem_list[0].protocol_uuid = UUID_PROTOCOL_L2CAP; 148 proto_elem_list[0].num_params = 0; 149 proto_elem_list[1].protocol_uuid = UUID_PROTOCOL_RFCOMM; 150 proto_elem_list[1].num_params = 1; 151 proto_elem_list[1].params[0] = scn; 152 result &= SDP_AddProtocolList(sdp_handle, BTA_AG_NUM_PROTO_ELEMS, proto_elem_list); 153 154 /* add service class id list */ 155 svc_class_id_list[0] = service_uuid; 156 svc_class_id_list[1] = UUID_SERVCLASS_GENERIC_AUDIO; 157 result &= SDP_AddServiceClassIdList(sdp_handle, BTA_AG_NUM_SVC_ELEMS, svc_class_id_list); 158 159 /* add profile descriptor list */ 160 if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE) 161 { 162 profile_uuid = UUID_SERVCLASS_HF_HANDSFREE; 163 version = HFP_VERSION_1_6; 164 } 165 else 166 { 167 profile_uuid = UUID_SERVCLASS_HEADSET; 168 version = HSP_VERSION_1_2; 169 } 170 result &= SDP_AddProfileDescriptorList(sdp_handle, profile_uuid, version); 171 172 /* add service name */ 173 if (p_service_name != NULL && p_service_name[0] != 0) 174 { 175 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SERVICE_NAME, TEXT_STR_DESC_TYPE, 176 (UINT32)(strlen(p_service_name)+1), (UINT8 *) p_service_name); 177 } 178 179 /* add features and network */ 180 if (service_uuid == UUID_SERVCLASS_AG_HANDSFREE) 181 { 182 network = (features & BTA_AG_FEAT_REJECT) ? 1 : 0; 183 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_DATA_STORES_OR_NETWORK, 184 UINT_DESC_TYPE, 1, &network); 185 186 if (features & BTA_AG_FEAT_CODEC) 187 codec_supported = TRUE; 188 189 features &= BTA_AG_SDP_FEAT_SPEC; 190 191 /* Codec bit position is different in SDP and in BRSF */ 192 if (codec_supported) 193 features |= 0x0020; 194 195 UINT16_TO_BE_FIELD(buf, features); 196 result &= SDP_AddAttribute(sdp_handle, ATTR_ID_SUPPORTED_FEATURES, UINT_DESC_TYPE, 2, buf); 197 } 198 199 /* add browse group list */ 200 result &= SDP_AddUuidSequence(sdp_handle, ATTR_ID_BROWSE_GROUP_LIST, 1, browse_list); 201 202 return result; 203 } 204 205 /******************************************************************************* 206 ** 207 ** Function bta_ag_create_records 208 ** 209 ** Description Create SDP records for registered services. 210 ** 211 ** 212 ** Returns void 213 ** 214 *******************************************************************************/ 215 void bta_ag_create_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data) 216 { 217 int i; 218 tBTA_SERVICE_MASK services; 219 220 services = p_scb->reg_services >> BTA_HSP_SERVICE_ID; 221 for (i = 0; i < BTA_AG_NUM_IDX && services != 0; i++, services >>= 1) 222 { 223 /* if service is set in mask */ 224 if (services & 1) 225 { 226 /* add sdp record if not already registered */ 227 if (bta_ag_cb.profile[i].sdp_handle == 0) 228 { 229 bta_ag_cb.profile[i].sdp_handle = SDP_CreateRecord(); 230 bta_ag_cb.profile[i].scn = BTM_AllocateSCN(); 231 bta_ag_add_record(bta_ag_uuid[i], p_data->api_register.p_name[i], 232 bta_ag_cb.profile[i].scn, p_data->api_register.features, 233 bta_ag_cb.profile[i].sdp_handle); 234 bta_sys_add_uuid(bta_ag_uuid[i]); 235 } 236 } 237 } 238 239 p_scb->hsp_version = HSP_VERSION_1_2; 240 241 } 242 243 /******************************************************************************* 244 ** 245 ** Function bta_ag_del_records 246 ** 247 ** Description Delete SDP records for any registered services. 248 ** 249 ** 250 ** Returns void 251 ** 252 *******************************************************************************/ 253 void bta_ag_del_records(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data) 254 { 255 tBTA_AG_SCB *p = &bta_ag_cb.scb[0]; 256 tBTA_SERVICE_MASK services; 257 tBTA_SERVICE_MASK others = 0; 258 int i; 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_DEBUG1("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 *) GKI_getbuf(BTA_AG_DISC_BUF_SIZE); 456 457 if(p_scb->p_disc_db) 458 { 459 /* set up service discovery database; attr happens to be attr_list len */ 460 uuid_list[0].len = LEN_UUID_16; 461 uuid_list[1].len = LEN_UUID_16; 462 db_inited = SDP_InitDiscoveryDb(p_scb->p_disc_db, BTA_AG_DISC_BUF_SIZE, num_uuid, 463 uuid_list, num_attr, attr_list); 464 } 465 466 if(db_inited) 467 { 468 /*Service discovery not initiated */ 469 db_inited = SDP_ServiceSearchAttributeRequest(p_scb->peer_addr, p_scb->p_disc_db, 470 bta_ag_sdp_cback_tbl[bta_ag_scb_to_idx(p_scb) - 1]); 471 } 472 473 if(!db_inited) 474 { 475 /*free discover db */ 476 bta_ag_free_db(p_scb, NULL); 477 /* sent failed event */ 478 bta_ag_sm_execute(p_scb, BTA_AG_DISC_FAIL_EVT, NULL); 479 } 480 481 } 482 483 /******************************************************************************* 484 ** 485 ** Function bta_ag_free_db 486 ** 487 ** Description Free discovery database. 488 ** 489 ** 490 ** Returns void 491 ** 492 *******************************************************************************/ 493 void bta_ag_free_db(tBTA_AG_SCB *p_scb, tBTA_AG_DATA *p_data) 494 { 495 if (p_scb->p_disc_db != NULL) 496 { 497 GKI_freebuf(p_scb->p_disc_db); 498 p_scb->p_disc_db = NULL; 499 } 500 } 501
