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 <string.h> 42 43 #include "bluetooth_psm.h" 44 #include "bluetooth_sdp.h" 45 #include "btstack_debug.h" 46 #include "btstack_event.h" 47 #include "btstack_memory.h" 48 #include "classic/sdp_client.h" 49 #include "classic/sdp_util.h" 50 #include "classic/avrcp.h" 51 #include "classic/avrcp_controller.h" 52 53 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 54 55 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 56 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 57 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 58 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 59 60 static uint16_t avrcp_cid_counter = 0; 61 62 static avrcp_context_t * sdp_query_context; 63 64 avrcp_context_t avrcp_controller_context; 65 avrcp_context_t avrcp_target_context; 66 67 static uint8_t attribute_value[45]; 68 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 69 70 static btstack_linked_list_t connections; 71 static btstack_packet_handler_t avrcp_controller_packet_handler; 72 static btstack_packet_handler_t avrcp_target_packet_handler; 73 static int l2cap_service_registered = 0; 74 75 static const char * avrcp_subunit_type_name[] = { 76 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 77 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 78 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 79 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 80 }; 81 82 const char * avrcp_subunit2str(uint16_t index){ 83 if (index <= 11) return avrcp_subunit_type_name[index]; 84 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 85 return avrcp_subunit_type_name[16]; 86 } 87 88 static const char * avrcp_event_name[] = { 89 "ERROR", "PLAYBACK_STATUS_CHANGED", 90 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 91 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 92 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 93 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 94 }; 95 const char * avrcp_event2str(uint16_t index){ 96 if (index <= 0x0d) return avrcp_event_name[index]; 97 return avrcp_event_name[0]; 98 } 99 100 static const char * avrcp_operation_name[] = { 101 "NOT SUPPORTED", // 0x3B 102 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 103 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 104 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 105 }; 106 const char * avrcp_operation2str(uint8_t index){ 107 if ((index >= 0x3B) && (index <= 0x4C)) return avrcp_operation_name[index - 0x3B]; 108 return avrcp_operation_name[0]; 109 } 110 111 static const char * avrcp_media_attribute_id_name[] = { 112 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 113 }; 114 const char * avrcp_attribute2str(uint8_t index){ 115 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 116 return avrcp_media_attribute_id_name[0]; 117 } 118 119 static const char * avrcp_play_status_name[] = { 120 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 121 "ERROR" // 0xFF 122 }; 123 const char * avrcp_play_status2str(uint8_t index){ 124 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 125 return avrcp_play_status_name[5]; 126 } 127 128 static const char * avrcp_ctype_name[] = { 129 "CONTROL", 130 "STATUS", 131 "SPECIFIC_INQUIRY", 132 "NOTIFY", 133 "GENERAL_INQUIRY", 134 "RESERVED5", 135 "RESERVED6", 136 "RESERVED7", 137 "NOT IMPLEMENTED IN REMOTE", 138 "ACCEPTED BY REMOTE", 139 "REJECTED BY REMOTE", 140 "IN_TRANSITION", 141 "IMPLEMENTED_STABLE", 142 "CHANGED_STABLE", 143 "RESERVED", 144 "INTERIM" 145 }; 146 const char * avrcp_ctype2str(uint8_t index){ 147 if (index < sizeof(avrcp_ctype_name)){ 148 return avrcp_ctype_name[index]; 149 } 150 return "NONE"; 151 } 152 153 static const char * avrcp_shuffle_mode_name[] = { 154 "SHUFFLE OFF", 155 "SHUFFLE ALL TRACKS", 156 "SHUFFLE GROUP" 157 }; 158 159 const char * avrcp_shuffle2str(uint8_t index){ 160 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 161 return "NONE"; 162 } 163 164 static const char * avrcp_repeat_mode_name[] = { 165 "REPEAT OFF", 166 "REPEAT SINGLE TRACK", 167 "REPEAT ALL TRACKS", 168 "REPEAT GROUP" 169 }; 170 171 const char * avrcp_repeat2str(uint8_t index){ 172 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 173 return "NONE"; 174 } 175 176 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 177 uint8_t cmd_opcode_index = 5; 178 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 179 return packet[cmd_opcode_index]; 180 } 181 182 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 183 const char * service_name, const char * service_provider_name){ 184 uint8_t* attribute; 185 de_create_sequence(service); 186 187 // 0x0000 "Service Record Handle" 188 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 189 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 190 191 // 0x0001 "Service Class ID List" 192 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 193 attribute = de_push_sequence(service); 194 { 195 if (controller){ 196 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 197 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 198 } else { 199 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 200 } 201 } 202 de_pop_sequence(service, attribute); 203 204 // 0x0004 "Protocol Descriptor List" 205 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 206 attribute = de_push_sequence(service); 207 { 208 uint8_t* l2cpProtocol = de_push_sequence(attribute); 209 { 210 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 211 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 212 } 213 de_pop_sequence(attribute, l2cpProtocol); 214 215 uint8_t* avctpProtocol = de_push_sequence(attribute); 216 { 217 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 218 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 219 } 220 de_pop_sequence(attribute, avctpProtocol); 221 } 222 de_pop_sequence(service, attribute); 223 224 // 0x0005 "Public Browse Group" 225 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 226 attribute = de_push_sequence(service); 227 { 228 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 229 } 230 de_pop_sequence(service, attribute); 231 232 // 0x0009 "Bluetooth Profile Descriptor List" 233 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 234 attribute = de_push_sequence(service); 235 { 236 uint8_t *avrcProfile = de_push_sequence(attribute); 237 { 238 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 239 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 240 } 241 de_pop_sequence(attribute, avrcProfile); 242 } 243 de_pop_sequence(service, attribute); 244 245 // 0x000d "Additional Bluetooth Profile Descriptor List" 246 if (browsing){ 247 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 248 attribute = de_push_sequence(service); 249 { 250 uint8_t * des = de_push_sequence(attribute); 251 { 252 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 253 { 254 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 255 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 256 } 257 de_pop_sequence(des, browsing_l2cpProtocol); 258 259 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 260 { 261 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 262 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 263 } 264 de_pop_sequence(des, browsing_avctpProtocol); 265 } 266 de_pop_sequence(attribute, des); 267 } 268 de_pop_sequence(service, attribute); 269 } 270 271 272 // 0x0100 "Service Name" 273 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 274 if (service_name){ 275 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 276 } else { 277 if (controller){ 278 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 279 } else { 280 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 281 } 282 } 283 284 // 0x0100 "Provider Name" 285 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 286 if (service_provider_name){ 287 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 288 } else { 289 if (controller){ 290 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 291 } else { 292 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 293 } 294 } 295 296 // 0x0311 "Supported Features" 297 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 298 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 299 } 300 301 avrcp_connection_t * get_avrcp_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 302 btstack_linked_list_iterator_t it; 303 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &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->role != role) continue; 307 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 308 return connection; 309 } 310 return NULL; 311 } 312 313 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 318 if (connection->role != role) continue; 319 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 320 return connection; 321 } 322 return NULL; 323 } 324 325 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 326 btstack_linked_list_iterator_t it; 327 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 328 while (btstack_linked_list_iterator_has_next(&it)){ 329 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 330 if (connection->role != role) continue; 331 if (connection->avrcp_cid != avrcp_cid) continue; 332 return connection; 333 } 334 return NULL; 335 } 336 337 avrcp_connection_t * get_avrcp_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 338 btstack_linked_list_iterator_t it; 339 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 340 while (btstack_linked_list_iterator_has_next(&it)){ 341 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 342 if (connection->role != role) continue; 343 if (connection->avrcp_browsing_cid != browsing_cid) continue; 344 return connection; 345 } 346 return NULL; 347 } 348 349 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 350 btstack_linked_list_iterator_t it; 351 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 352 while (btstack_linked_list_iterator_has_next(&it)){ 353 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 354 if (connection->role != role) continue; 355 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 356 return connection; 357 } 358 return NULL; 359 } 360 361 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 362 btstack_linked_list_iterator_t it; 363 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 364 while (btstack_linked_list_iterator_has_next(&it)){ 365 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 366 if (connection->role != role) continue; 367 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 368 return connection->browsing_connection; 369 } 370 return NULL; 371 } 372 373 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 374 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 375 connection->wait_to_send = 1; 376 l2cap_request_can_send_now_event(l2cap_cid); 377 } 378 379 380 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 381 do { 382 if (avrcp_cid_counter == 0xffff) { 383 avrcp_cid_counter = 1; 384 } else { 385 avrcp_cid_counter++; 386 } 387 } while (get_avrcp_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 388 return avrcp_cid_counter; 389 } 390 391 392 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 393 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 394 if (!connection){ 395 log_error("Not enough memory to create connection for role %d", role); 396 return NULL; 397 } 398 399 connection->state = AVCTP_CONNECTION_IDLE; 400 connection->role = role; 401 connection->transaction_label = 0xFF; 402 connection->max_num_fragments = 0xFF; 403 connection->avrcp_cid = avrcp_get_next_cid(role); 404 log_info("avrcp_create_connection, role %d, avrcp cid 0x%02x", role, connection->avrcp_cid); 405 (void)memcpy(connection->remote_addr, remote_addr, 6); 406 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 407 return connection; 408 } 409 410 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 411 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 412 btstack_memory_avrcp_connection_free(connection); 413 } 414 415 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 416 if (!callback) return; 417 uint8_t event[12]; 418 int pos = 0; 419 event[pos++] = HCI_EVENT_AVRCP_META; 420 event[pos++] = sizeof(event) - 2; 421 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 422 event[pos++] = status; 423 reverse_bd_addr(addr,&event[pos]); 424 pos += 6; 425 little_endian_store_16(event, pos, avrcp_cid); 426 pos += 2; 427 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 428 } 429 430 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 431 if (!callback) return; 432 uint8_t event[5]; 433 int pos = 0; 434 event[pos++] = HCI_EVENT_AVRCP_META; 435 event[pos++] = sizeof(event) - 2; 436 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 437 little_endian_store_16(event, pos, avrcp_cid); 438 pos += 2; 439 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 440 } 441 442 static void avrcp_handle_sdp_client_query_attribute_value(avrcp_connection_t * connection , uint8_t *packet){ 443 des_iterator_t des_list_it; 444 des_iterator_t prot_it; 445 446 // Handle new SDP record 447 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 448 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 449 sdp_query_context->parse_sdp_record = 0; 450 // log_info("SDP Record: Nr: %d", record_id); 451 } 452 453 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 454 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 455 456 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 457 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 458 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 459 if (de_get_element_type(attribute_value) != DE_DES) break; 460 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 461 uint8_t * element = des_iterator_get_element(&des_list_it); 462 if (de_get_element_type(element) != DE_UUID) continue; 463 uint32_t uuid = de_get_uuid32(element); 464 switch (uuid){ 465 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 466 if (sdp_query_context->role == AVRCP_CONTROLLER) { 467 sdp_query_context->parse_sdp_record = 1; 468 break; 469 } 470 break; 471 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 472 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 473 if (sdp_query_context->role == AVRCP_TARGET) { 474 sdp_query_context->parse_sdp_record = 1; 475 break; 476 } 477 break; 478 default: 479 break; 480 } 481 } 482 break; 483 484 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 485 if (!sdp_query_context->parse_sdp_record) break; 486 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 487 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 488 uint8_t *des_element; 489 uint8_t *element; 490 uint32_t uuid; 491 492 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 493 494 des_element = des_iterator_get_element(&des_list_it); 495 des_iterator_init(&prot_it, des_element); 496 element = des_iterator_get_element(&prot_it); 497 498 if (de_get_element_type(element) != DE_UUID) continue; 499 500 uuid = de_get_uuid32(element); 501 des_iterator_next(&prot_it); 502 switch (uuid){ 503 case BLUETOOTH_PROTOCOL_L2CAP: 504 if (!des_iterator_has_more(&prot_it)) continue; 505 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 506 break; 507 case BLUETOOTH_PROTOCOL_AVCTP: 508 if (!des_iterator_has_more(&prot_it)) continue; 509 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 510 break; 511 default: 512 break; 513 } 514 } 515 } 516 break; 517 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 518 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 519 if (!sdp_query_context->parse_sdp_record) break; 520 if (de_get_element_type(attribute_value) != DE_DES) break; 521 522 des_iterator_t des_list_0_it; 523 uint8_t *element_0; 524 525 des_iterator_init(&des_list_0_it, attribute_value); 526 element_0 = des_iterator_get_element(&des_list_0_it); 527 528 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 529 uint8_t *des_element; 530 uint8_t *element; 531 uint32_t uuid; 532 533 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 534 535 des_element = des_iterator_get_element(&des_list_it); 536 des_iterator_init(&prot_it, des_element); 537 element = des_iterator_get_element(&prot_it); 538 539 if (de_get_element_type(element) != DE_UUID) continue; 540 541 uuid = de_get_uuid32(element); 542 des_iterator_next(&prot_it); 543 switch (uuid){ 544 case BLUETOOTH_PROTOCOL_L2CAP: 545 if (!des_iterator_has_more(&prot_it)) continue; 546 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_l2cap_psm); 547 break; 548 case BLUETOOTH_PROTOCOL_AVCTP: 549 if (!des_iterator_has_more(&prot_it)) continue; 550 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); 551 break; 552 default: 553 break; 554 } 555 } 556 } 557 break; 558 default: 559 break; 560 } 561 } 562 } else { 563 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)); 564 } 565 } 566 567 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 568 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid_for_role(sdp_query_context->role, sdp_query_context->avrcp_cid); 569 570 if (!connection) return; 571 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 572 573 UNUSED(packet_type); 574 UNUSED(channel); 575 UNUSED(size); 576 577 uint8_t status; 578 579 switch (hci_event_packet_get_type(packet)){ 580 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 581 avrcp_handle_sdp_client_query_attribute_value(connection, packet); 582 break; 583 584 case SDP_EVENT_QUERY_COMPLETE:{ 585 status = sdp_event_query_complete_get_status(packet); 586 587 if (status != ERROR_CODE_SUCCESS){ 588 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 589 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 590 avrcp_finalize_connection(connection); 591 break; 592 } 593 594 if (!sdp_query_context->avrcp_l2cap_psm){ 595 connection->state = AVCTP_CONNECTION_IDLE; 596 log_info("AVRCP: no suitable service found"); 597 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 598 avrcp_finalize_connection(connection); 599 break; 600 } 601 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 602 l2cap_create_channel(&avrcp_packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 603 break; 604 } 605 } 606 } 607 608 static btstack_packet_handler_t avrcp_packet_handler_for_role(avrcp_role_t role){ 609 switch (role){ 610 case AVRCP_CONTROLLER: 611 return avrcp_controller_packet_handler; 612 case AVRCP_TARGET: 613 return avrcp_target_packet_handler; 614 } 615 return NULL; 616 } 617 618 static int avrcp_handle_incoming_connection_for_role(avrcp_role_t role, bd_addr_t event_addr, uint16_t local_cid){ 619 if (!avrcp_packet_handler_for_role(role)) { 620 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, PH not defined\n", role); 621 return 0; 622 } 623 624 avrcp_connection_t * connection = avrcp_create_connection(role, event_addr); 625 if (!connection) { 626 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, no connection created\n", role); 627 return 0 ; 628 } 629 630 // printf("AVRCP: AVCTP_CONNECTION_W4_L2CAP_CONNECTED, role %d\n", role); 631 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 632 connection->l2cap_signaling_cid = local_cid; 633 return 1; 634 } 635 636 static void avrcp_handle_open_connection_for_role(avrcp_role_t role, bd_addr_t event_addr, uint16_t local_cid, uint16_t l2cap_mtu, uint8_t status){ 637 // printf("AVRCP: avrcp_handle_open_connection_for_role %d\n", role); 638 639 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 640 if (!packet_handler) { 641 // printf("AVRCP: avrcp_handle_open_connection_for_role %d, PH not defined\n", role); 642 return; 643 } 644 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr_for_role(role, event_addr); 645 if (!connection) { 646 // printf("AVRCP: avrcp_handle_open_connection_for_role %d, no connection found\n", role); 647 return; 648 } 649 650 if (connection->state == AVCTP_CONNECTION_OPENED) return; 651 652 if (status != ERROR_CODE_SUCCESS){ 653 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 654 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, status); 655 avrcp_finalize_connection(connection); 656 return; 657 } 658 659 connection->l2cap_signaling_cid = local_cid; 660 connection->l2cap_mtu = l2cap_mtu; 661 connection->incoming_declined = false; 662 connection->song_length_ms = 0xFFFFFFFF; 663 connection->song_position_ms = 0xFFFFFFFF; 664 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 665 666 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d", connection->avrcp_cid, connection->l2cap_signaling_cid, connection->role); 667 connection->state = AVCTP_CONNECTION_OPENED; 668 // emit twice for each role 669 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 670 } 671 672 static void avrcp_handle_close_connection_for_role(avrcp_role_t role,uint16_t local_cid){ 673 // printf("AVRCP: avrcp_handle_close_connection_for_role %d\n", role); 674 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 675 if (!packet_handler) return; 676 677 avrcp_connection_t * connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(role, local_cid); 678 if (!connection) return; 679 680 // printf("avrcp_handle_close_connection_for_role avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d\n", connection->avrcp_cid, connection->l2cap_signaling_cid, role); 681 682 avrcp_emit_connection_closed(packet_handler, connection->avrcp_cid); 683 avrcp_finalize_connection(connection); 684 } 685 686 static avrcp_role_t avrcp_role_from_transport_header(uint8_t transport_header){ 687 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((transport_header & 0x02) >> 1); 688 switch (frame_type){ 689 case AVRCP_COMMAND_FRAME: 690 return AVRCP_TARGET; 691 default: // AVRCP_RESPONSE_FRAME - make compiler happy 692 return AVRCP_CONTROLLER; 693 } 694 } 695 696 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 697 UNUSED(channel); 698 UNUSED(size); 699 bd_addr_t event_addr; 700 uint16_t local_cid; 701 uint16_t l2cap_mtu; 702 uint8_t status; 703 avrcp_connection_t * connection = NULL; 704 avrcp_role_t role; 705 btstack_packet_handler_t packet_handler; 706 uint8_t status_target; 707 uint8_t status_controller; 708 bool decline_connection; 709 bool outoing_active; 710 711 switch (packet_type) { 712 case L2CAP_DATA_PACKET: 713 role = avrcp_role_from_transport_header(packet[0]); 714 packet_handler = avrcp_packet_handler_for_role(role); 715 if (!packet_handler) return; 716 717 (*packet_handler)(packet_type, channel, packet, size); 718 break; 719 720 case HCI_EVENT_PACKET: 721 switch (hci_event_packet_get_type(packet)) { 722 723 case L2CAP_EVENT_INCOMING_CONNECTION: 724 l2cap_event_incoming_connection_get_address(packet, event_addr); 725 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 726 outoing_active = false; 727 connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 728 if (connection != NULL){ 729 outoing_active = true; 730 connection->incoming_declined = true; 731 } 732 733 connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 734 if (connection != NULL){ 735 outoing_active = true; 736 connection->incoming_declined = true; 737 } 738 739 decline_connection = outoing_active; 740 if (outoing_active == false){ 741 // create two connection objects (both) 742 status_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, event_addr, local_cid); 743 status_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid); 744 if (!status_target && !status_controller) { 745 decline_connection = true; 746 } 747 } 748 if (decline_connection){ 749 l2cap_decline_connection(local_cid); 750 } else { 751 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 752 l2cap_accept_connection(local_cid); 753 } 754 break; 755 756 case L2CAP_EVENT_CHANNEL_OPENED: 757 // printf("AVRCP: L2CAP_EVENT_CHANNEL_OPENED \n"); 758 l2cap_event_channel_opened_get_address(packet, event_addr); 759 status = l2cap_event_channel_opened_get_status(packet); 760 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 761 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 762 763 avrcp_handle_open_connection_for_role(AVRCP_TARGET, event_addr, local_cid, l2cap_mtu, status); 764 avrcp_handle_open_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid, l2cap_mtu, status); 765 break; 766 767 case L2CAP_EVENT_CHANNEL_CLOSED: 768 // data: event (8), len(8), channel (16) 769 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 770 avrcp_handle_close_connection_for_role(AVRCP_TARGET, local_cid); 771 avrcp_handle_close_connection_for_role(AVRCP_CONTROLLER, local_cid); 772 break; 773 774 case L2CAP_EVENT_CAN_SEND_NOW: 775 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 776 connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 777 if (connection && connection->wait_to_send){ 778 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW target\n"); 779 connection->wait_to_send = 0; 780 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 781 break; 782 } 783 784 connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 785 if (connection && connection->wait_to_send){ 786 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW controller\n"); 787 connection->wait_to_send = 0; 788 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 789 break; 790 } 791 break; 792 793 default: 794 break; 795 } 796 break; 797 default: 798 break; 799 } 800 } 801 802 uint8_t avrcp_connect(avrcp_role_t role, bd_addr_t bd_addr, uint16_t * avrcp_cid){ 803 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr_for_role(role, bd_addr); 804 if (connection) return ERROR_CODE_COMMAND_DISALLOWED; 805 806 if (!sdp_client_ready()) return ERROR_CODE_COMMAND_DISALLOWED; 807 808 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 809 if (!packet_handler) return 0; 810 811 connection = avrcp_create_connection(role, bd_addr); 812 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 813 814 if (avrcp_cid){ 815 *avrcp_cid = connection->avrcp_cid; 816 } 817 818 switch (role){ 819 case AVRCP_CONTROLLER: 820 sdp_query_context = &avrcp_controller_context; 821 break; 822 case AVRCP_TARGET: 823 sdp_query_context = &avrcp_target_context; 824 break; 825 } 826 827 connection->browsing_l2cap_psm = 0; 828 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 829 830 sdp_query_context->avrcp_l2cap_psm = 0; 831 sdp_query_context->avrcp_version = 0; 832 sdp_query_context->avrcp_cid = connection->avrcp_cid; 833 834 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 835 return ERROR_CODE_SUCCESS; 836 } 837 838 void avrcp_init(void){ 839 connections = NULL; 840 if (l2cap_service_registered) return; 841 842 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 843 if (status != ERROR_CODE_SUCCESS) return; 844 l2cap_service_registered = 1; 845 } 846 847 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 848 avrcp_controller_packet_handler = callback; 849 } 850 851 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 852 avrcp_target_packet_handler = callback; 853 } 854 855