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 64 static const char * avrcp_subunit_type_name[] = { 65 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 66 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 67 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 68 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 69 }; 70 71 const char * avrcp_subunit2str(uint16_t index){ 72 if (index <= 11) return avrcp_subunit_type_name[index]; 73 if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; 74 return avrcp_subunit_type_name[16]; 75 } 76 77 static const char * avrcp_event_name[] = { 78 "ERROR", "PLAYBACK_STATUS_CHANGED", 79 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 80 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 81 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 82 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 83 }; 84 const char * avrcp_event2str(uint16_t index){ 85 if (index <= 0x0d) return avrcp_event_name[index]; 86 return avrcp_event_name[0]; 87 } 88 89 static const char * avrcp_operation_name[] = { 90 "NOT SUPPORTED", // 0x3B 91 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 92 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 93 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 94 }; 95 const char * avrcp_operation2str(uint8_t index){ 96 if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; 97 return avrcp_operation_name[0]; 98 } 99 100 static const char * avrcp_media_attribute_id_name[] = { 101 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 102 }; 103 const char * avrcp_attribute2str(uint8_t index){ 104 if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; 105 return avrcp_media_attribute_id_name[0]; 106 } 107 108 static const char * avrcp_play_status_name[] = { 109 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 110 "ERROR" // 0xFF 111 }; 112 const char * avrcp_play_status2str(uint8_t index){ 113 if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; 114 return avrcp_play_status_name[5]; 115 } 116 117 static const char * avrcp_ctype_name[] = { 118 "CONTROL", 119 "STATUS", 120 "SPECIFIC_INQUIRY", 121 "NOTIFY", 122 "GENERAL_INQUIRY", 123 "RESERVED5", 124 "RESERVED6", 125 "RESERVED7", 126 "NOT IMPLEMENTED IN REMOTE", 127 "ACCEPTED BY REMOTE", 128 "REJECTED BY REMOTE", 129 "IN_TRANSITION", 130 "IMPLEMENTED_STABLE", 131 "CHANGED_STABLE", 132 "RESERVED", 133 "INTERIM" 134 }; 135 const char * avrcp_ctype2str(uint8_t index){ 136 if (index < sizeof(avrcp_ctype_name)){ 137 return avrcp_ctype_name[index]; 138 } 139 return "NONE"; 140 } 141 142 static const char * avrcp_shuffle_mode_name[] = { 143 "SHUFFLE OFF", 144 "SHUFFLE ALL TRACKS", 145 "SHUFFLE GROUP" 146 }; 147 148 const char * avrcp_shuffle2str(uint8_t index){ 149 if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; 150 return "NONE"; 151 } 152 153 static const char * avrcp_repeat_mode_name[] = { 154 "REPEAT OFF", 155 "REPEAT SINGLE TRACK", 156 "REPEAT ALL TRACKS", 157 "REPEAT GROUP" 158 }; 159 160 const char * avrcp_repeat2str(uint8_t index){ 161 if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; 162 return "NONE"; 163 } 164 165 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 166 uint8_t cmd_opcode_index = 5; 167 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 168 return packet[cmd_opcode_index]; 169 } 170 171 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 172 const char * service_name, const char * service_provider_name){ 173 uint8_t* attribute; 174 de_create_sequence(service); 175 176 // 0x0000 "Service Record Handle" 177 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 178 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 179 180 // 0x0001 "Service Class ID List" 181 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 182 attribute = de_push_sequence(service); 183 { 184 if (controller){ 185 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 186 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 187 } else { 188 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 189 } 190 } 191 de_pop_sequence(service, attribute); 192 193 // 0x0004 "Protocol Descriptor List" 194 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 195 attribute = de_push_sequence(service); 196 { 197 uint8_t* l2cpProtocol = de_push_sequence(attribute); 198 { 199 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 200 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); 201 } 202 de_pop_sequence(attribute, l2cpProtocol); 203 204 uint8_t* avctpProtocol = de_push_sequence(attribute); 205 { 206 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 207 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 208 } 209 de_pop_sequence(attribute, avctpProtocol); 210 } 211 de_pop_sequence(service, attribute); 212 213 // 0x0005 "Public Browse Group" 214 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 215 attribute = de_push_sequence(service); 216 { 217 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 218 } 219 de_pop_sequence(service, attribute); 220 221 // 0x0009 "Bluetooth Profile Descriptor List" 222 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 223 attribute = de_push_sequence(service); 224 { 225 uint8_t *avrcProfile = de_push_sequence(attribute); 226 { 227 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 228 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 229 } 230 de_pop_sequence(attribute, avrcProfile); 231 } 232 de_pop_sequence(service, attribute); 233 234 // 0x000d "Additional Bluetooth Profile Descriptor List" 235 if (browsing){ 236 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 237 attribute = de_push_sequence(service); 238 { 239 uint8_t * des = de_push_sequence(attribute); 240 { 241 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 242 { 243 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 244 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); 245 } 246 de_pop_sequence(des, browsing_l2cpProtocol); 247 248 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 249 { 250 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 251 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 252 } 253 de_pop_sequence(des, browsing_avctpProtocol); 254 } 255 de_pop_sequence(attribute, des); 256 } 257 de_pop_sequence(service, attribute); 258 } 259 260 261 // 0x0100 "Service Name" 262 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 263 if (service_name){ 264 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 265 } else { 266 if (controller){ 267 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 268 } else { 269 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 270 } 271 } 272 273 // 0x0100 "Provider Name" 274 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 275 if (service_provider_name){ 276 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 277 } else { 278 if (controller){ 279 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 280 } else { 281 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 282 } 283 } 284 285 // 0x0311 "Supported Features" 286 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 287 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 288 } 289 290 avrcp_connection_t * get_avrcp_connection_for_bd_addr(bd_addr_t addr, avrcp_context_t * context){ 291 btstack_linked_list_iterator_t it; 292 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 293 while (btstack_linked_list_iterator_has_next(&it)){ 294 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 295 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 296 return connection; 297 } 298 return NULL; 299 } 300 301 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 302 btstack_linked_list_iterator_t it; 303 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 304 while (btstack_linked_list_iterator_has_next(&it)){ 305 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 306 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 307 return connection; 308 } 309 return NULL; 310 } 311 312 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(uint16_t avrcp_cid, avrcp_context_t * context){ 313 btstack_linked_list_iterator_t it; 314 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 315 while (btstack_linked_list_iterator_has_next(&it)){ 316 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 317 if (connection->avrcp_cid != avrcp_cid) continue; 318 return connection; 319 } 320 return NULL; 321 } 322 323 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 324 connection->wait_to_send = 1; 325 l2cap_request_can_send_now_event(l2cap_cid); 326 } 327 328 329 uint16_t avrcp_get_next_cid(void){ 330 avrcp_cid_counter++; 331 if (avrcp_cid_counter == 0){ 332 avrcp_cid_counter = 1; 333 } 334 return avrcp_cid_counter; 335 } 336 337 static avrcp_connection_t * avrcp_create_connection(bd_addr_t remote_addr, avrcp_context_t * context){ 338 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 339 if (!connection){ 340 log_error("avrcp: not enough memory to create connection"); 341 return NULL; 342 } 343 connection->state = AVCTP_CONNECTION_IDLE; 344 connection->transaction_label = 0xFF; 345 connection->max_num_fragments = 0xFF; 346 connection->avrcp_cid = avrcp_get_next_cid(); 347 memcpy(connection->remote_addr, remote_addr, 6); 348 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 349 return connection; 350 } 351 352 static void avrcp_finalize_connection(avrcp_connection_t * connection, avrcp_context_t * context){ 353 btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); 354 btstack_memory_avrcp_connection_free(connection); 355 } 356 357 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 358 if (!callback) return; 359 uint8_t event[12]; 360 int pos = 0; 361 event[pos++] = HCI_EVENT_AVRCP_META; 362 event[pos++] = sizeof(event) - 2; 363 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 364 event[pos++] = status; 365 reverse_bd_addr(addr,&event[pos]); 366 pos += 6; 367 little_endian_store_16(event, pos, avrcp_cid); 368 pos += 2; 369 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 370 } 371 372 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 373 if (!callback) return; 374 uint8_t event[5]; 375 int pos = 0; 376 event[pos++] = HCI_EVENT_AVRCP_META; 377 event[pos++] = sizeof(event) - 2; 378 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 379 little_endian_store_16(event, pos, avrcp_cid); 380 pos += 2; 381 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 382 } 383 384 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 385 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->avrcp_cid, sdp_query_context); 386 if (!connection) return; 387 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 388 389 UNUSED(packet_type); 390 UNUSED(channel); 391 UNUSED(size); 392 uint8_t status; 393 des_iterator_t des_list_it; 394 des_iterator_t prot_it; 395 // uint32_t avdtp_remote_uuid = 0; 396 397 switch (hci_event_packet_get_type(packet)){ 398 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 399 // Handle new SDP record 400 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 401 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 402 sdp_query_context->parse_sdp_record = 0; 403 // log_info("SDP Record: Nr: %d", record_id); 404 } 405 406 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 407 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 408 409 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 410 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 411 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 412 if (de_get_element_type(attribute_value) != DE_DES) break; 413 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 414 uint8_t * element = des_iterator_get_element(&des_list_it); 415 if (de_get_element_type(element) != DE_UUID) continue; 416 uint32_t uuid = de_get_uuid32(element); 417 switch (uuid){ 418 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 419 if (sdp_query_context->role == AVRCP_CONTROLLER) { 420 sdp_query_context->parse_sdp_record = 1; 421 break; 422 } 423 break; 424 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 425 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 426 if (sdp_query_context->role == AVRCP_TARGET) { 427 sdp_query_context->parse_sdp_record = 1; 428 break; 429 } 430 break; 431 default: 432 break; 433 } 434 } 435 break; 436 437 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 438 if (!sdp_query_context->parse_sdp_record) break; 439 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 440 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 441 uint8_t *des_element; 442 uint8_t *element; 443 uint32_t uuid; 444 445 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 446 447 des_element = des_iterator_get_element(&des_list_it); 448 des_iterator_init(&prot_it, des_element); 449 element = des_iterator_get_element(&prot_it); 450 451 if (de_get_element_type(element) != DE_UUID) continue; 452 453 uuid = de_get_uuid32(element); 454 des_iterator_next(&prot_it); 455 switch (uuid){ 456 case BLUETOOTH_PROTOCOL_L2CAP: 457 if (!des_iterator_has_more(&prot_it)) continue; 458 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 459 break; 460 case BLUETOOTH_PROTOCOL_AVCTP: 461 if (!des_iterator_has_more(&prot_it)) continue; 462 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 463 break; 464 default: 465 break; 466 } 467 } 468 } 469 break; 470 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 471 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 472 if (!sdp_query_context->parse_sdp_record) break; 473 if (de_get_element_type(attribute_value) != DE_DES) break; 474 475 des_iterator_t des_list_0_it; 476 uint8_t *element_0; 477 478 des_iterator_init(&des_list_0_it, attribute_value); 479 element_0 = des_iterator_get_element(&des_list_0_it); 480 481 for (des_iterator_init(&des_list_it, element_0); 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), &connection->browsing_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), &connection->browsing_version); 504 break; 505 default: 506 break; 507 } 508 } 509 } 510 break; 511 default: 512 break; 513 } 514 } 515 } else { 516 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)); 517 } 518 break; 519 520 case SDP_EVENT_QUERY_COMPLETE:{ 521 status = sdp_event_query_complete_get_status(packet); 522 523 if (status != ERROR_CODE_SUCCESS){ 524 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 525 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 526 avrcp_finalize_connection(connection, sdp_query_context); 527 break; 528 } 529 530 if (!sdp_query_context->avrcp_l2cap_psm){ 531 connection->state = AVCTP_CONNECTION_IDLE; 532 log_info("AVRCP: no suitable service found"); 533 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 534 avrcp_finalize_connection(connection, sdp_query_context); 535 break; 536 } 537 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 538 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 539 break; 540 } 541 } 542 } 543 544 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 545 UNUSED(channel); 546 UNUSED(size); 547 bd_addr_t event_addr; 548 uint16_t local_cid; 549 uint8_t status; 550 avrcp_connection_t * connection = NULL; 551 uint16_t psm; 552 553 if (packet_type != HCI_EVENT_PACKET) return; 554 555 switch (hci_event_packet_get_type(packet)) { 556 case HCI_EVENT_DISCONNECTION_COMPLETE: 557 avrcp_emit_connection_closed(context->avrcp_callback, 0); 558 break; 559 case L2CAP_EVENT_INCOMING_CONNECTION: 560 l2cap_event_incoming_connection_get_address(packet, event_addr); 561 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 562 connection = avrcp_create_connection(event_addr, context); 563 if (!connection) { 564 log_error("Failed to alloc connection structure"); 565 l2cap_decline_connection(local_cid); 566 break; 567 } 568 569 psm = l2cap_event_incoming_connection_get_psm(packet); 570 if (psm == PSM_AVCTP){ 571 if (!connection->l2cap_signaling_cid){ 572 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 573 connection->l2cap_signaling_cid = local_cid; 574 log_info("L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 575 l2cap_accept_connection(local_cid); 576 break; 577 } 578 } 579 log_info("L2CAP_EVENT_INCOMING_CONNECTION local_cid 0x%02x, psm 0x%2x, decline connection", local_cid, psm); 580 l2cap_decline_connection(local_cid); 581 break; 582 583 case L2CAP_EVENT_CHANNEL_OPENED: 584 l2cap_event_channel_opened_get_address(packet, event_addr); 585 status = l2cap_event_channel_opened_get_status(packet); 586 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 587 588 connection = get_avrcp_connection_for_bd_addr(event_addr, context); 589 if (!connection){ 590 // TODO: validate if this cannot happen. If not, drop disconnect call 591 log_error("AVRCP connection lookup failed"); 592 l2cap_disconnect(local_cid, 0); // reason isn't used 593 break; 594 } 595 if (status != ERROR_CODE_SUCCESS){ 596 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 597 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, status); 598 avrcp_finalize_connection(connection, context); 599 break; 600 } 601 602 psm = l2cap_event_channel_opened_get_psm(packet); 603 if (psm == PSM_AVCTP){ 604 connection->l2cap_signaling_cid = local_cid; 605 connection->l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 606 connection->song_length_ms = 0xFFFFFFFF; 607 connection->song_position_ms = 0xFFFFFFFF; 608 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 609 610 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 611 connection->state = AVCTP_CONNECTION_OPENED; 612 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 613 } 614 break; 615 616 case L2CAP_EVENT_CHANNEL_CLOSED: 617 // data: event (8), len(8), channel (16) 618 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 619 connection = get_avrcp_connection_for_l2cap_signaling_cid(local_cid, context); 620 if (connection){ 621 avrcp_emit_connection_closed(context->avrcp_callback, connection->avrcp_cid); 622 avrcp_finalize_connection(connection, context); 623 break; 624 } 625 break; 626 default: 627 break; 628 } 629 } 630 631 uint8_t avrcp_connect(bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 632 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(bd_addr, context); 633 if (connection) return ERROR_CODE_COMMAND_DISALLOWED; 634 635 if (!sdp_client_ready()) return ERROR_CODE_COMMAND_DISALLOWED; 636 637 connection = avrcp_create_connection(bd_addr, context); 638 if (!connection){ 639 log_error("avrcp: could not allocate connection struct."); 640 return BTSTACK_MEMORY_ALLOC_FAILED; 641 } 642 643 if (avrcp_cid){ 644 *avrcp_cid = connection->avrcp_cid; 645 } 646 647 context->avrcp_l2cap_psm = 0; 648 context->avrcp_version = 0; 649 context->avrcp_cid = connection->avrcp_cid; 650 connection->browsing_l2cap_psm = 0; 651 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 652 653 sdp_query_context = context; 654 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 655 return ERROR_CODE_SUCCESS; 656 } 657