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 /* 53 Category 1: Player/Recorder 54 Category 2: Monitor/Amplifier 55 Category 3: Tuner 56 Category 4: Menu 57 */ 58 59 /* controller supported features 60 Bit 0 = Category 1 61 Bit 1 = Category 2 62 Bit 2 = Category 3 63 Bit 3 = Category 4 64 Bit 4-5 = RFA 65 Bit 6 = Supports browsing 66 Bit 7-15 = RFA 67 The bits for supported categories are set to 1. Others are set to 0. 68 */ 69 70 /* target supported features 71 Bit 0 = Category 1 72 Bit 1 = Category 2 73 Bit 2 = Category 3 74 Bit 3 = Category 4 75 Bit 4 = Player Application Settings. Bit 0 should be set for this bit to be set. 76 Bit 5 = Group Navigation. Bit 0 should be set for this bit to be set. 77 Bit 6 = Supports browsing*4 78 Bit 7 = Supports multiple media player applications 79 Bit 8-15 = RFA 80 The bits for supported categories are set to 1. Others are set to 0. 81 */ 82 83 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 84 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 85 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 86 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 87 88 static uint16_t avrcp_cid_counter = 0; 89 90 static avrcp_context_t * sdp_query_context; 91 static uint8_t attribute_value[1000]; 92 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 93 94 95 static const char * avrcp_subunit_type_name[] = { 96 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 97 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 98 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 99 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 100 }; 101 102 const char * avrcp_subunit2str(uint16_t index){ 103 if (index <= 11) return avrcp_subunit_type_name[index]; 104 if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; 105 return avrcp_subunit_type_name[16]; 106 } 107 108 static const char * avrcp_event_name[] = { 109 "ERROR", "PLAYBACK_STATUS_CHANGED", 110 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 111 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 112 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 113 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 114 }; 115 const char * avrcp_event2str(uint16_t index){ 116 if (index <= 0x0d) return avrcp_event_name[index]; 117 return avrcp_event_name[0]; 118 } 119 120 static const char * avrcp_operation_name[] = { 121 "NOT SUPPORTED", // 0x3B 122 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 123 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 124 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 125 }; 126 const char * avrcp_operation2str(uint8_t index){ 127 if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; 128 return avrcp_operation_name[0]; 129 } 130 131 static const char * avrcp_media_attribute_id_name[] = { 132 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 133 }; 134 const char * avrcp_attribute2str(uint8_t index){ 135 if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; 136 return avrcp_media_attribute_id_name[0]; 137 } 138 139 static const char * avrcp_play_status_name[] = { 140 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 141 "ERROR" // 0xFF 142 }; 143 const char * avrcp_play_status2str(uint8_t index){ 144 if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; 145 return avrcp_play_status_name[5]; 146 } 147 148 static const char * avrcp_ctype_name[] = { 149 "CONTROL", 150 "STATUS", 151 "SPECIFIC_INQUIRY", 152 "NOTIFY", 153 "GENERAL_INQUIRY", 154 "RESERVED5", 155 "RESERVED6", 156 "RESERVED7", 157 "NOT IMPLEMENTED IN REMOTE", 158 "ACCEPTED BY REMOTE", 159 "REJECTED BY REMOTE", 160 "IN_TRANSITION", 161 "IMPLEMENTED_STABLE", 162 "CHANGED_STABLE", 163 "RESERVED", 164 "INTERIM" 165 }; 166 const char * avrcp_ctype2str(uint8_t index){ 167 if (index < sizeof(avrcp_ctype_name)){ 168 return avrcp_ctype_name[index]; 169 } 170 return "NONE"; 171 } 172 173 static const char * avrcp_shuffle_mode_name[] = { 174 "SHUFFLE OFF", 175 "SHUFFLE ALL TRACKS", 176 "SHUFFLE GROUP" 177 }; 178 179 const char * avrcp_shuffle2str(uint8_t index){ 180 if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; 181 return "NONE"; 182 } 183 184 static const char * avrcp_repeat_mode_name[] = { 185 "REPEAT OFF", 186 "REPEAT SINGLE TRACK", 187 "REPEAT ALL TRACKS", 188 "REPEAT GROUP" 189 }; 190 191 const char * avrcp_repeat2str(uint8_t index){ 192 if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; 193 return "NONE"; 194 } 195 196 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 197 uint8_t cmd_opcode_index = 5; 198 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 199 return packet[cmd_opcode_index]; 200 } 201 202 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 203 uint8_t* attribute; 204 de_create_sequence(service); 205 206 // 0x0000 "Service Record Handle" 207 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 208 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 209 210 // 0x0001 "Service Class ID List" 211 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 212 attribute = de_push_sequence(service); 213 { 214 if (controller){ 215 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 216 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 217 } else { 218 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 219 } 220 } 221 de_pop_sequence(service, attribute); 222 223 // 0x0004 "Protocol Descriptor List" 224 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 225 attribute = de_push_sequence(service); 226 { 227 uint8_t* l2cpProtocol = de_push_sequence(attribute); 228 { 229 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 230 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); 231 } 232 de_pop_sequence(attribute, l2cpProtocol); 233 234 uint8_t* avctpProtocol = de_push_sequence(attribute); 235 { 236 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 237 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 238 } 239 de_pop_sequence(attribute, avctpProtocol); 240 } 241 de_pop_sequence(service, attribute); 242 243 // 0x0005 "Public Browse Group" 244 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 245 attribute = de_push_sequence(service); 246 { 247 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 248 } 249 de_pop_sequence(service, attribute); 250 251 // 0x0009 "Bluetooth Profile Descriptor List" 252 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 253 attribute = de_push_sequence(service); 254 { 255 uint8_t *avrcProfile = de_push_sequence(attribute); 256 { 257 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 258 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 259 } 260 de_pop_sequence(attribute, avrcProfile); 261 } 262 de_pop_sequence(service, attribute); 263 264 // 0x000d "Additional Bluetooth Profile Descriptor List" 265 if (browsing){ 266 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 267 attribute = de_push_sequence(service); 268 { 269 uint8_t * des = de_push_sequence(attribute); 270 { 271 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 272 { 273 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 274 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); 275 } 276 de_pop_sequence(des, browsing_l2cpProtocol); 277 278 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 279 { 280 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 281 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 282 } 283 de_pop_sequence(des, browsing_avctpProtocol); 284 } 285 de_pop_sequence(attribute, des); 286 } 287 de_pop_sequence(service, attribute); 288 } 289 290 291 // 0x0100 "Service Name" 292 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 293 if (service_name){ 294 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 295 } else { 296 if (controller){ 297 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 298 } else { 299 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 300 } 301 } 302 303 // 0x0100 "Provider Name" 304 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 305 if (service_provider_name){ 306 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 307 } else { 308 if (controller){ 309 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 310 } else { 311 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 312 } 313 } 314 315 // 0x0311 "Supported Features" 316 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 317 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 318 } 319 320 avrcp_connection_t * get_avrcp_connection_for_bd_addr(bd_addr_t addr, avrcp_context_t * context){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 325 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 326 return connection; 327 } 328 return NULL; 329 } 330 331 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 332 btstack_linked_list_iterator_t it; 333 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 334 while (btstack_linked_list_iterator_has_next(&it)){ 335 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 336 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 337 return connection; 338 } 339 return NULL; 340 } 341 342 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(uint16_t avrcp_cid, avrcp_context_t * context){ 343 btstack_linked_list_iterator_t it; 344 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 345 while (btstack_linked_list_iterator_has_next(&it)){ 346 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 347 if (connection->avrcp_cid != avrcp_cid) continue; 348 return connection; 349 } 350 return NULL; 351 } 352 353 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 354 connection->wait_to_send = 1; 355 l2cap_request_can_send_now_event(l2cap_cid); 356 } 357 358 359 uint16_t avrcp_get_next_cid(void){ 360 avrcp_cid_counter++; 361 if (avrcp_cid_counter == 0){ 362 avrcp_cid_counter = 1; 363 } 364 return avrcp_cid_counter; 365 } 366 367 static avrcp_connection_t * avrcp_create_connection(bd_addr_t remote_addr, avrcp_context_t * context){ 368 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 369 if (!connection){ 370 log_error("avrcp: not enough memory to create connection"); 371 return NULL; 372 } 373 memset(connection, 0, sizeof(avrcp_connection_t)); 374 connection->state = AVCTP_CONNECTION_IDLE; 375 connection->transaction_label = 0xFF; 376 connection->avrcp_cid = avrcp_get_next_cid(); 377 memcpy(connection->remote_addr, remote_addr, 6); 378 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 379 return connection; 380 } 381 382 383 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 384 if (!callback) return; 385 uint8_t event[12]; 386 int pos = 0; 387 event[pos++] = HCI_EVENT_AVRCP_META; 388 event[pos++] = sizeof(event) - 2; 389 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 390 event[pos++] = status; 391 reverse_bd_addr(addr,&event[pos]); 392 pos += 6; 393 little_endian_store_16(event, pos, avrcp_cid); 394 pos += 2; 395 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 396 } 397 398 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 399 if (!callback) return; 400 uint8_t event[5]; 401 int pos = 0; 402 event[pos++] = HCI_EVENT_AVRCP_META; 403 event[pos++] = sizeof(event) - 2; 404 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 405 little_endian_store_16(event, pos, avrcp_cid); 406 pos += 2; 407 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 408 } 409 410 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 411 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->avrcp_cid, sdp_query_context); 412 if (!connection) return; 413 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 414 415 UNUSED(packet_type); 416 UNUSED(channel); 417 UNUSED(size); 418 uint8_t status; 419 des_iterator_t des_list_it; 420 des_iterator_t prot_it; 421 // uint32_t avdtp_remote_uuid = 0; 422 423 switch (hci_event_packet_get_type(packet)){ 424 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 425 // Handle new SDP record 426 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 427 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 428 sdp_query_context->parse_sdp_record = 0; 429 // log_info("SDP Record: Nr: %d", record_id); 430 } 431 432 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 433 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 434 435 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 436 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 437 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 438 if (de_get_element_type(attribute_value) != DE_DES) break; 439 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 440 uint8_t * element = des_iterator_get_element(&des_list_it); 441 if (de_get_element_type(element) != DE_UUID) continue; 442 uint32_t uuid = de_get_uuid32(element); 443 switch (uuid){ 444 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 445 if (sdp_query_context->role == AVRCP_CONTROLLER) { 446 sdp_query_context->parse_sdp_record = 1; 447 break; 448 } 449 break; 450 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 451 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 452 if (sdp_query_context->role == AVRCP_TARGET) { 453 sdp_query_context->parse_sdp_record = 1; 454 break; 455 } 456 break; 457 default: 458 break; 459 } 460 } 461 break; 462 463 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 464 if (!sdp_query_context->parse_sdp_record) break; 465 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 466 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 467 uint8_t *des_element; 468 uint8_t *element; 469 uint32_t uuid; 470 471 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 472 473 des_element = des_iterator_get_element(&des_list_it); 474 des_iterator_init(&prot_it, des_element); 475 element = des_iterator_get_element(&prot_it); 476 477 if (de_get_element_type(element) != DE_UUID) continue; 478 479 uuid = de_get_uuid32(element); 480 switch (uuid){ 481 case BLUETOOTH_PROTOCOL_L2CAP: 482 if (!des_iterator_has_more(&prot_it)) continue; 483 des_iterator_next(&prot_it); 484 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 485 break; 486 case BLUETOOTH_PROTOCOL_AVCTP: 487 if (!des_iterator_has_more(&prot_it)) continue; 488 des_iterator_next(&prot_it); 489 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 490 break; 491 default: 492 break; 493 } 494 } 495 } 496 break; 497 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 498 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 499 if (!sdp_query_context->parse_sdp_record) break; 500 if (de_get_element_type(attribute_value) != DE_DES) break; 501 502 des_iterator_t des_list_0_it; 503 uint8_t *element_0; 504 505 des_iterator_init(&des_list_0_it, attribute_value); 506 element_0 = des_iterator_get_element(&des_list_0_it); 507 508 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 509 uint8_t *des_element; 510 uint8_t *element; 511 uint32_t uuid; 512 513 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 514 515 des_element = des_iterator_get_element(&des_list_it); 516 des_iterator_init(&prot_it, des_element); 517 element = des_iterator_get_element(&prot_it); 518 519 if (de_get_element_type(element) != DE_UUID) continue; 520 521 uuid = de_get_uuid32(element); 522 switch (uuid){ 523 case BLUETOOTH_PROTOCOL_L2CAP: 524 if (!des_iterator_has_more(&prot_it)) continue; 525 des_iterator_next(&prot_it); 526 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_l2cap_psm); 527 break; 528 case BLUETOOTH_PROTOCOL_AVCTP: 529 if (!des_iterator_has_more(&prot_it)) continue; 530 des_iterator_next(&prot_it); 531 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); 532 break; 533 default: 534 break; 535 } 536 } 537 } 538 break; 539 default: 540 break; 541 } 542 } 543 } else { 544 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)); 545 } 546 break; 547 548 case SDP_EVENT_QUERY_COMPLETE:{ 549 status = sdp_event_query_complete_get_status(packet); 550 551 if (status != ERROR_CODE_SUCCESS){ 552 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 553 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 554 btstack_memory_avrcp_connection_free(connection); 555 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 556 break; 557 } 558 559 if (!sdp_query_context->parse_sdp_record){ 560 connection->state = AVCTP_CONNECTION_IDLE; 561 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 562 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 563 btstack_memory_avrcp_connection_free(connection); 564 break; 565 } 566 // log_info("AVRCP Control PSM 0x%02x, Browsing PSM 0x%02x", sdp_query_context->avrcp_l2cap_psm, sdp_query_context->browsing_l2cap_psm); 567 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 568 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 569 break; 570 } 571 } 572 } 573 574 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 575 UNUSED(channel); 576 UNUSED(size); 577 bd_addr_t event_addr; 578 uint16_t local_cid; 579 uint8_t status; 580 avrcp_connection_t * connection = NULL; 581 582 if (packet_type != HCI_EVENT_PACKET) return; 583 584 switch (hci_event_packet_get_type(packet)) { 585 case HCI_EVENT_DISCONNECTION_COMPLETE: 586 avrcp_emit_connection_closed(context->avrcp_callback, 0); 587 break; 588 case L2CAP_EVENT_INCOMING_CONNECTION: 589 l2cap_event_incoming_connection_get_address(packet, event_addr); 590 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 591 connection = avrcp_create_connection(event_addr, context); 592 if (!connection) { 593 log_error("Failed to alloc connection structure"); 594 l2cap_decline_connection(local_cid); 595 break; 596 } 597 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 598 connection->l2cap_signaling_cid = local_cid; 599 log_info("L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 600 l2cap_accept_connection(local_cid); 601 break; 602 603 case L2CAP_EVENT_CHANNEL_OPENED: 604 l2cap_event_channel_opened_get_address(packet, event_addr); 605 status = l2cap_event_channel_opened_get_status(packet); 606 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 607 608 connection = get_avrcp_connection_for_bd_addr(event_addr, context); 609 if (!connection){ 610 log_error("Failed to alloc AVRCP connection structure"); 611 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, BTSTACK_MEMORY_ALLOC_FAILED); 612 l2cap_disconnect(local_cid, 0); // reason isn't used 613 break; 614 } 615 if (status != ERROR_CODE_SUCCESS){ 616 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 617 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, status); 618 btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); 619 btstack_memory_avrcp_connection_free(connection); 620 break; 621 } 622 connection->l2cap_signaling_cid = local_cid; 623 connection->song_length_ms = 0xFFFFFFFF; 624 connection->song_position_ms = 0xFFFFFFFF; 625 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 626 627 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 628 connection->state = AVCTP_CONNECTION_OPENED; 629 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 630 break; 631 632 case L2CAP_EVENT_CHANNEL_CLOSED: 633 // data: event (8), len(8), channel (16) 634 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 635 connection = get_avrcp_connection_for_l2cap_signaling_cid(local_cid, context); 636 if (connection){ 637 avrcp_emit_connection_closed(context->avrcp_callback, connection->avrcp_cid); 638 // free connection 639 btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); 640 btstack_memory_avrcp_connection_free(connection); 641 break; 642 } 643 break; 644 default: 645 break; 646 } 647 } 648 649 uint8_t avrcp_connect(bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 650 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(bd_addr, context); 651 if (connection){ 652 return ERROR_CODE_COMMAND_DISALLOWED; 653 } 654 connection = avrcp_create_connection(bd_addr, context); 655 if (!connection){ 656 log_error("avrcp: could not allocate connection struct."); 657 return BTSTACK_MEMORY_ALLOC_FAILED; 658 } 659 660 if (!avrcp_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 661 662 *avrcp_cid = connection->avrcp_cid; 663 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 664 665 context->avrcp_l2cap_psm = 0; 666 context->avrcp_version = 0; 667 context->avrcp_cid = connection->avrcp_cid; 668 connection->browsing_l2cap_psm = 0; 669 sdp_query_context = context; 670 return sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, bd_addr, BLUETOOTH_PROTOCOL_AVCTP); 671 } 672