1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "avrcp.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_controller.h" 48 49 #define PSM_AVCTP BLUETOOTH_PROTOCOL_AVCTP 50 #define PSM_AVCTP_BROWSING 0x001b 51 52 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 53 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 54 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 55 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 56 57 static uint16_t avrcp_cid_counter = 0; 58 59 static avrcp_context_t * sdp_query_context; 60 static uint8_t attribute_value[1000]; 61 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 62 63 static btstack_linked_list_t connections; 64 65 static const char * avrcp_subunit_type_name[] = { 66 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 67 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 68 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 69 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 70 }; 71 72 const char * avrcp_subunit2str(uint16_t index){ 73 if (index <= 11) return avrcp_subunit_type_name[index]; 74 if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; 75 return avrcp_subunit_type_name[16]; 76 } 77 78 static const char * avrcp_event_name[] = { 79 "ERROR", "PLAYBACK_STATUS_CHANGED", 80 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 81 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 82 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 83 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 84 }; 85 const char * avrcp_event2str(uint16_t index){ 86 if (index <= 0x0d) return avrcp_event_name[index]; 87 return avrcp_event_name[0]; 88 } 89 90 static const char * avrcp_operation_name[] = { 91 "NOT SUPPORTED", // 0x3B 92 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 93 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 94 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 95 }; 96 const char * avrcp_operation2str(uint8_t index){ 97 if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; 98 return avrcp_operation_name[0]; 99 } 100 101 static const char * avrcp_media_attribute_id_name[] = { 102 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 103 }; 104 const char * avrcp_attribute2str(uint8_t index){ 105 if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; 106 return avrcp_media_attribute_id_name[0]; 107 } 108 109 static const char * avrcp_play_status_name[] = { 110 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 111 "ERROR" // 0xFF 112 }; 113 const char * avrcp_play_status2str(uint8_t index){ 114 if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; 115 return avrcp_play_status_name[5]; 116 } 117 118 static const char * avrcp_ctype_name[] = { 119 "CONTROL", 120 "STATUS", 121 "SPECIFIC_INQUIRY", 122 "NOTIFY", 123 "GENERAL_INQUIRY", 124 "RESERVED5", 125 "RESERVED6", 126 "RESERVED7", 127 "NOT IMPLEMENTED IN REMOTE", 128 "ACCEPTED BY REMOTE", 129 "REJECTED BY REMOTE", 130 "IN_TRANSITION", 131 "IMPLEMENTED_STABLE", 132 "CHANGED_STABLE", 133 "RESERVED", 134 "INTERIM" 135 }; 136 const char * avrcp_ctype2str(uint8_t index){ 137 if (index < sizeof(avrcp_ctype_name)){ 138 return avrcp_ctype_name[index]; 139 } 140 return "NONE"; 141 } 142 143 static const char * avrcp_shuffle_mode_name[] = { 144 "SHUFFLE OFF", 145 "SHUFFLE ALL TRACKS", 146 "SHUFFLE GROUP" 147 }; 148 149 const char * avrcp_shuffle2str(uint8_t index){ 150 if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; 151 return "NONE"; 152 } 153 154 static const char * avrcp_repeat_mode_name[] = { 155 "REPEAT OFF", 156 "REPEAT SINGLE TRACK", 157 "REPEAT ALL TRACKS", 158 "REPEAT GROUP" 159 }; 160 161 const char * avrcp_repeat2str(uint8_t index){ 162 if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; 163 return "NONE"; 164 } 165 166 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 167 uint8_t cmd_opcode_index = 5; 168 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 169 return packet[cmd_opcode_index]; 170 } 171 172 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 173 const char * service_name, const char * service_provider_name){ 174 uint8_t* attribute; 175 de_create_sequence(service); 176 177 // 0x0000 "Service Record Handle" 178 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 179 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 180 181 // 0x0001 "Service Class ID List" 182 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 183 attribute = de_push_sequence(service); 184 { 185 if (controller){ 186 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 187 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 188 } else { 189 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 190 } 191 } 192 de_pop_sequence(service, attribute); 193 194 // 0x0004 "Protocol Descriptor List" 195 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 196 attribute = de_push_sequence(service); 197 { 198 uint8_t* l2cpProtocol = de_push_sequence(attribute); 199 { 200 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 201 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); 202 } 203 de_pop_sequence(attribute, l2cpProtocol); 204 205 uint8_t* avctpProtocol = de_push_sequence(attribute); 206 { 207 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 208 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 209 } 210 de_pop_sequence(attribute, avctpProtocol); 211 } 212 de_pop_sequence(service, attribute); 213 214 // 0x0005 "Public Browse Group" 215 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 216 attribute = de_push_sequence(service); 217 { 218 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 219 } 220 de_pop_sequence(service, attribute); 221 222 // 0x0009 "Bluetooth Profile Descriptor List" 223 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 224 attribute = de_push_sequence(service); 225 { 226 uint8_t *avrcProfile = de_push_sequence(attribute); 227 { 228 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 229 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 230 } 231 de_pop_sequence(attribute, avrcProfile); 232 } 233 de_pop_sequence(service, attribute); 234 235 // 0x000d "Additional Bluetooth Profile Descriptor List" 236 if (browsing){ 237 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 238 attribute = de_push_sequence(service); 239 { 240 uint8_t * des = de_push_sequence(attribute); 241 { 242 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 243 { 244 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 245 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); 246 } 247 de_pop_sequence(des, browsing_l2cpProtocol); 248 249 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 250 { 251 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 252 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 253 } 254 de_pop_sequence(des, browsing_avctpProtocol); 255 } 256 de_pop_sequence(attribute, des); 257 } 258 de_pop_sequence(service, attribute); 259 } 260 261 262 // 0x0100 "Service Name" 263 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 264 if (service_name){ 265 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 266 } else { 267 if (controller){ 268 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 269 } else { 270 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 271 } 272 } 273 274 // 0x0100 "Provider Name" 275 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 276 if (service_provider_name){ 277 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 278 } else { 279 if (controller){ 280 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 281 } else { 282 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 283 } 284 } 285 286 // 0x0311 "Supported Features" 287 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 288 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 289 } 290 291 avrcp_connection_t * get_avrcp_connection_for_bd_addr(avrcp_role_t role, bd_addr_t addr){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 296 if (connection->role != role) continue; 297 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 298 return connection; 299 } 300 return NULL; 301 } 302 303 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(avrcp_role_t role, uint16_t l2cap_cid){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 308 if (connection->role != role) continue; 309 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 310 return connection; 311 } 312 return NULL; 313 } 314 315 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(avrcp_role_t role, uint16_t avrcp_cid){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 320 if (connection->role != role) continue; 321 if (connection->avrcp_cid != avrcp_cid) continue; 322 return connection; 323 } 324 return NULL; 325 } 326 327 avrcp_connection_t * get_avrcp_connection_for_browsing_cid(avrcp_role_t role, uint16_t browsing_cid){ 328 btstack_linked_list_iterator_t it; 329 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 330 while (btstack_linked_list_iterator_has_next(&it)){ 331 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 332 if (connection->role != role) continue; 333 if (connection->avrcp_browsing_cid != browsing_cid) continue; 334 return connection; 335 } 336 return NULL; 337 } 338 339 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 340 btstack_linked_list_iterator_t it; 341 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 342 while (btstack_linked_list_iterator_has_next(&it)){ 343 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 344 if (connection->role != role) continue; 345 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 346 return connection; 347 } 348 return NULL; 349 } 350 351 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(avrcp_role_t role, uint16_t l2cap_cid){ 352 btstack_linked_list_iterator_t it; 353 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 354 while (btstack_linked_list_iterator_has_next(&it)){ 355 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 356 if (connection->role != role) continue; 357 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 358 return connection->browsing_connection; 359 } 360 return NULL; 361 } 362 363 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 364 connection->wait_to_send = 1; 365 l2cap_request_can_send_now_event(l2cap_cid); 366 } 367 368 369 uint16_t avrcp_get_next_cid(void){ 370 avrcp_cid_counter++; 371 if (avrcp_cid_counter == 0){ 372 avrcp_cid_counter = 1; 373 } 374 return avrcp_cid_counter; 375 } 376 377 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 378 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 379 if (!connection){ 380 log_error("avrcp: not enough memory to create connection"); 381 return NULL; 382 } 383 connection->role = role; 384 connection->state = AVCTP_CONNECTION_IDLE; 385 connection->transaction_label = 0xFF; 386 connection->max_num_fragments = 0xFF; 387 connection->avrcp_cid = avrcp_get_next_cid(); 388 memcpy(connection->remote_addr, remote_addr, 6); 389 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 390 return connection; 391 } 392 393 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 394 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 395 btstack_memory_avrcp_connection_free(connection); 396 } 397 398 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 399 if (!callback) return; 400 uint8_t event[12]; 401 int pos = 0; 402 event[pos++] = HCI_EVENT_AVRCP_META; 403 event[pos++] = sizeof(event) - 2; 404 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 405 event[pos++] = status; 406 reverse_bd_addr(addr,&event[pos]); 407 pos += 6; 408 little_endian_store_16(event, pos, avrcp_cid); 409 pos += 2; 410 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 411 } 412 413 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 414 if (!callback) return; 415 uint8_t event[5]; 416 int pos = 0; 417 event[pos++] = HCI_EVENT_AVRCP_META; 418 event[pos++] = sizeof(event) - 2; 419 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 420 little_endian_store_16(event, pos, avrcp_cid); 421 pos += 2; 422 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 423 } 424 425 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 426 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->role, sdp_query_context->avrcp_cid); 427 if (!connection) return; 428 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 429 430 UNUSED(packet_type); 431 UNUSED(channel); 432 UNUSED(size); 433 uint8_t status; 434 des_iterator_t des_list_it; 435 des_iterator_t prot_it; 436 // uint32_t avdtp_remote_uuid = 0; 437 438 switch (hci_event_packet_get_type(packet)){ 439 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 440 // Handle new SDP record 441 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 442 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 443 sdp_query_context->parse_sdp_record = 0; 444 // log_info("SDP Record: Nr: %d", record_id); 445 } 446 447 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 448 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 449 450 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 451 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 452 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 453 if (de_get_element_type(attribute_value) != DE_DES) break; 454 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 455 uint8_t * element = des_iterator_get_element(&des_list_it); 456 if (de_get_element_type(element) != DE_UUID) continue; 457 uint32_t uuid = de_get_uuid32(element); 458 switch (uuid){ 459 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 460 if (sdp_query_context->role == AVRCP_CONTROLLER) { 461 sdp_query_context->parse_sdp_record = 1; 462 break; 463 } 464 break; 465 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 466 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 467 if (sdp_query_context->role == AVRCP_TARGET) { 468 sdp_query_context->parse_sdp_record = 1; 469 break; 470 } 471 break; 472 default: 473 break; 474 } 475 } 476 break; 477 478 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 479 if (!sdp_query_context->parse_sdp_record) break; 480 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 481 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 482 uint8_t *des_element; 483 uint8_t *element; 484 uint32_t uuid; 485 486 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 487 488 des_element = des_iterator_get_element(&des_list_it); 489 des_iterator_init(&prot_it, des_element); 490 element = des_iterator_get_element(&prot_it); 491 492 if (de_get_element_type(element) != DE_UUID) continue; 493 494 uuid = de_get_uuid32(element); 495 des_iterator_next(&prot_it); 496 switch (uuid){ 497 case BLUETOOTH_PROTOCOL_L2CAP: 498 if (!des_iterator_has_more(&prot_it)) continue; 499 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 500 break; 501 case BLUETOOTH_PROTOCOL_AVCTP: 502 if (!des_iterator_has_more(&prot_it)) continue; 503 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 504 break; 505 default: 506 break; 507 } 508 } 509 } 510 break; 511 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 512 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 513 if (!sdp_query_context->parse_sdp_record) break; 514 if (de_get_element_type(attribute_value) != DE_DES) break; 515 516 des_iterator_t des_list_0_it; 517 uint8_t *element_0; 518 519 des_iterator_init(&des_list_0_it, attribute_value); 520 element_0 = des_iterator_get_element(&des_list_0_it); 521 522 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 523 uint8_t *des_element; 524 uint8_t *element; 525 uint32_t uuid; 526 527 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 528 529 des_element = des_iterator_get_element(&des_list_it); 530 des_iterator_init(&prot_it, des_element); 531 element = des_iterator_get_element(&prot_it); 532 533 if (de_get_element_type(element) != DE_UUID) continue; 534 535 uuid = de_get_uuid32(element); 536 des_iterator_next(&prot_it); 537 switch (uuid){ 538 case BLUETOOTH_PROTOCOL_L2CAP: 539 if (!des_iterator_has_more(&prot_it)) continue; 540 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_l2cap_psm); 541 break; 542 case BLUETOOTH_PROTOCOL_AVCTP: 543 if (!des_iterator_has_more(&prot_it)) continue; 544 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); 545 break; 546 default: 547 break; 548 } 549 } 550 } 551 break; 552 default: 553 break; 554 } 555 } 556 } else { 557 log_error("SDP attribute value buffer size exceeded: available %d, required %d", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 558 } 559 break; 560 561 case SDP_EVENT_QUERY_COMPLETE:{ 562 status = sdp_event_query_complete_get_status(packet); 563 564 if (status != ERROR_CODE_SUCCESS){ 565 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 566 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 567 avrcp_finalize_connection(connection); 568 break; 569 } 570 571 if (!sdp_query_context->avrcp_l2cap_psm){ 572 connection->state = AVCTP_CONNECTION_IDLE; 573 log_info("AVRCP: no suitable service found"); 574 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 575 avrcp_finalize_connection(connection); 576 break; 577 } 578 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 579 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 580 break; 581 } 582 } 583 } 584 585 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 586 UNUSED(channel); 587 UNUSED(size); 588 bd_addr_t event_addr; 589 uint16_t local_cid; 590 uint8_t status; 591 avrcp_connection_t * connection = NULL; 592 uint16_t psm; 593 594 if (packet_type != HCI_EVENT_PACKET) return; 595 596 switch (hci_event_packet_get_type(packet)) { 597 case HCI_EVENT_DISCONNECTION_COMPLETE: 598 avrcp_emit_connection_closed(context->avrcp_callback, 0); 599 break; 600 case L2CAP_EVENT_INCOMING_CONNECTION: 601 l2cap_event_incoming_connection_get_address(packet, event_addr); 602 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 603 connection = avrcp_create_connection(context->role, event_addr); 604 if (!connection) { 605 log_error("Failed to alloc connection structure"); 606 l2cap_decline_connection(local_cid); 607 break; 608 } 609 610 psm = l2cap_event_incoming_connection_get_psm(packet); 611 if (psm == PSM_AVCTP){ 612 if (!connection->l2cap_signaling_cid){ 613 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 614 connection->l2cap_signaling_cid = local_cid; 615 log_info("L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 616 l2cap_accept_connection(local_cid); 617 break; 618 } 619 } 620 log_info("L2CAP_EVENT_INCOMING_CONNECTION local_cid 0x%02x, psm 0x%2x, decline connection", local_cid, psm); 621 l2cap_decline_connection(local_cid); 622 break; 623 624 case L2CAP_EVENT_CHANNEL_OPENED: 625 l2cap_event_channel_opened_get_address(packet, event_addr); 626 status = l2cap_event_channel_opened_get_status(packet); 627 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 628 629 connection = get_avrcp_connection_for_bd_addr(context->role, event_addr); 630 if (!connection){ 631 // TODO: validate if this cannot happen. If not, drop disconnect call 632 log_error("AVRCP connection lookup failed"); 633 l2cap_disconnect(local_cid, 0); // reason isn't used 634 break; 635 } 636 if (status != ERROR_CODE_SUCCESS){ 637 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 638 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, status); 639 avrcp_finalize_connection(connection); 640 break; 641 } 642 643 psm = l2cap_event_channel_opened_get_psm(packet); 644 if (psm == PSM_AVCTP){ 645 connection->l2cap_signaling_cid = local_cid; 646 connection->l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 647 connection->song_length_ms = 0xFFFFFFFF; 648 connection->song_position_ms = 0xFFFFFFFF; 649 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 650 651 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 652 connection->state = AVCTP_CONNECTION_OPENED; 653 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 654 } 655 break; 656 657 case L2CAP_EVENT_CHANNEL_CLOSED: 658 // data: event (8), len(8), channel (16) 659 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 660 connection = get_avrcp_connection_for_l2cap_signaling_cid(context->role, local_cid); 661 if (connection){ 662 avrcp_emit_connection_closed(context->avrcp_callback, connection->avrcp_cid); 663 avrcp_finalize_connection(connection); 664 break; 665 } 666 break; 667 default: 668 break; 669 } 670 } 671 672 uint8_t avrcp_connect(avrcp_role_t role, bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 673 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(context->role, bd_addr); 674 if (connection) return ERROR_CODE_COMMAND_DISALLOWED; 675 676 if (!sdp_client_ready()) return ERROR_CODE_COMMAND_DISALLOWED; 677 678 connection = avrcp_create_connection(role, bd_addr); 679 if (!connection){ 680 log_error("avrcp: could not allocate connection struct."); 681 return BTSTACK_MEMORY_ALLOC_FAILED; 682 } 683 684 if (avrcp_cid){ 685 *avrcp_cid = connection->avrcp_cid; 686 } 687 688 context->avrcp_l2cap_psm = 0; 689 context->avrcp_version = 0; 690 context->avrcp_cid = connection->avrcp_cid; 691 connection->browsing_l2cap_psm = 0; 692 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 693 694 sdp_query_context = context; 695 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 696 return ERROR_CODE_SUCCESS; 697 } 698 699 void avrcp_init(void){ 700 connections = NULL; 701 } 702