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 static btstack_packet_handler_t avrcp_packet_handler_for_role(avrcp_role_t role){ 374 switch (role){ 375 case AVRCP_CONTROLLER: 376 return avrcp_controller_packet_handler; 377 case AVRCP_TARGET: 378 return avrcp_target_packet_handler; 379 } 380 return NULL; 381 } 382 383 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 384 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 385 connection->wait_to_send = 1; 386 l2cap_request_can_send_now_event(l2cap_cid); 387 } 388 389 390 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 391 do { 392 if (avrcp_cid_counter == 0xffff) { 393 avrcp_cid_counter = 1; 394 } else { 395 avrcp_cid_counter++; 396 } 397 } while (get_avrcp_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 398 return avrcp_cid_counter; 399 } 400 401 402 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 403 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 404 if (!connection){ 405 log_error("Not enough memory to create connection for role %d", role); 406 return NULL; 407 } 408 409 connection->state = AVCTP_CONNECTION_IDLE; 410 connection->role = role; 411 connection->transaction_label = 0xFF; 412 connection->max_num_fragments = 0xFF; 413 log_info("avrcp_create_connection, role %d, avrcp cid 0x%02x", role, connection->avrcp_cid); 414 (void)memcpy(connection->remote_addr, remote_addr, 6); 415 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 416 return connection; 417 } 418 419 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 420 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 421 btstack_memory_avrcp_connection_free(connection); 422 } 423 424 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 425 if (!callback) return; 426 uint8_t event[12]; 427 int pos = 0; 428 event[pos++] = HCI_EVENT_AVRCP_META; 429 event[pos++] = sizeof(event) - 2; 430 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 431 event[pos++] = status; 432 reverse_bd_addr(addr,&event[pos]); 433 pos += 6; 434 little_endian_store_16(event, pos, avrcp_cid); 435 pos += 2; 436 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 437 } 438 439 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 440 if (!callback) return; 441 uint8_t event[5]; 442 int pos = 0; 443 event[pos++] = HCI_EVENT_AVRCP_META; 444 event[pos++] = sizeof(event) - 2; 445 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 446 little_endian_store_16(event, pos, avrcp_cid); 447 pos += 2; 448 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 449 } 450 451 static void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 452 des_iterator_t des_list_it; 453 des_iterator_t prot_it; 454 455 // Handle new SDP record 456 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 457 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 458 sdp_query_context->parse_sdp_record = 0; 459 // log_info("SDP Record: Nr: %d", record_id); 460 } 461 462 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 463 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 464 465 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 466 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 467 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 468 if (de_get_element_type(attribute_value) != DE_DES) break; 469 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 470 uint8_t * element = des_iterator_get_element(&des_list_it); 471 if (de_get_element_type(element) != DE_UUID) continue; 472 uint32_t uuid = de_get_uuid32(element); 473 switch (uuid){ 474 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 475 if (sdp_query_context->role == AVRCP_CONTROLLER) { 476 sdp_query_context->parse_sdp_record = 1; 477 break; 478 } 479 break; 480 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 481 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 482 if (sdp_query_context->role == AVRCP_TARGET) { 483 sdp_query_context->parse_sdp_record = 1; 484 break; 485 } 486 break; 487 default: 488 break; 489 } 490 } 491 break; 492 493 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 494 if (!sdp_query_context->parse_sdp_record) break; 495 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 496 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 497 uint8_t *des_element; 498 uint8_t *element; 499 uint32_t uuid; 500 501 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 502 503 des_element = des_iterator_get_element(&des_list_it); 504 des_iterator_init(&prot_it, des_element); 505 element = des_iterator_get_element(&prot_it); 506 507 if (de_get_element_type(element) != DE_UUID) continue; 508 509 uuid = de_get_uuid32(element); 510 des_iterator_next(&prot_it); 511 switch (uuid){ 512 case BLUETOOTH_PROTOCOL_L2CAP: 513 if (!des_iterator_has_more(&prot_it)) continue; 514 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 515 break; 516 case BLUETOOTH_PROTOCOL_AVCTP: 517 if (!des_iterator_has_more(&prot_it)) continue; 518 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 519 break; 520 default: 521 break; 522 } 523 } 524 } 525 break; 526 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 527 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 528 if (!sdp_query_context->parse_sdp_record) break; 529 if (de_get_element_type(attribute_value) != DE_DES) break; 530 531 des_iterator_t des_list_0_it; 532 uint8_t *element_0; 533 534 des_iterator_init(&des_list_0_it, attribute_value); 535 element_0 = des_iterator_get_element(&des_list_0_it); 536 537 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 538 uint8_t *des_element; 539 uint8_t *element; 540 uint32_t uuid; 541 542 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 543 544 des_element = des_iterator_get_element(&des_list_it); 545 des_iterator_init(&prot_it, des_element); 546 element = des_iterator_get_element(&prot_it); 547 548 if (de_get_element_type(element) != DE_UUID) continue; 549 550 uuid = de_get_uuid32(element); 551 des_iterator_next(&prot_it); 552 switch (uuid){ 553 case BLUETOOTH_PROTOCOL_L2CAP: 554 if (!des_iterator_has_more(&prot_it)) continue; 555 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->browsing_l2cap_psm); 556 break; 557 case BLUETOOTH_PROTOCOL_AVCTP: 558 if (!des_iterator_has_more(&prot_it)) continue; 559 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->browsing_version); 560 break; 561 default: 562 break; 563 } 564 } 565 } 566 break; 567 default: 568 break; 569 } 570 } 571 } else { 572 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)); 573 } 574 } 575 576 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 577 if (connection == NULL) return; 578 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 579 avrcp_emit_connection_established(avrcp_packet_handler_for_role(connection->role), connection->avrcp_cid, connection->remote_addr, status); 580 avrcp_finalize_connection(connection); 581 } 582 583 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection, uint16_t browsing_l2cap_psm, uint16_t browsing_version){ 584 if (connection == NULL) return; 585 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 586 connection->browsing_version = browsing_version; 587 connection->browsing_l2cap_psm = browsing_l2cap_psm; 588 } 589 590 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 591 UNUSED(packet_type); 592 UNUSED(channel); 593 UNUSED(size); 594 595 avrcp_connection_t * avrcp_target_connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, sdp_query_context->remote_addr); 596 avrcp_connection_t * avrcp_controller_connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, sdp_query_context->remote_addr); 597 598 uint8_t status; 599 600 switch (hci_event_packet_get_type(packet)){ 601 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 602 avrcp_handle_sdp_client_query_attribute_value(packet); 603 break; 604 605 case SDP_EVENT_QUERY_COMPLETE: 606 status = sdp_event_query_complete_get_status(packet); 607 608 if (status != ERROR_CODE_SUCCESS){ 609 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 610 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 611 break; 612 } 613 614 if (!sdp_query_context->avrcp_l2cap_psm){ 615 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 616 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 617 break; 618 } 619 620 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection, sdp_query_context->browsing_l2cap_psm, sdp_query_context->browsing_version); 621 avrcp_handle_sdp_query_succeeded(avrcp_target_connection, sdp_query_context->browsing_l2cap_psm, sdp_query_context->browsing_version); 622 623 l2cap_create_channel(&avrcp_packet_handler, sdp_query_context->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 624 break; 625 626 default: 627 break; 628 629 } 630 } 631 632 633 static int avrcp_handle_incoming_connection_for_role(avrcp_role_t role, bd_addr_t event_addr, uint16_t local_cid, uint16_t avrcp_cid){ 634 if (!avrcp_packet_handler_for_role(role)) { 635 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, PH not defined\n", role); 636 return 0; 637 } 638 639 avrcp_connection_t * connection = avrcp_create_connection(role, event_addr); 640 641 if (!connection) { 642 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, no connection created\n", role); 643 return 0 ; 644 } 645 646 // printf("AVRCP: AVCTP_CONNECTION_W4_L2CAP_CONNECTED, role %d\n", role); 647 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 648 connection->l2cap_signaling_cid = local_cid; 649 connection->avrcp_cid = avrcp_cid; 650 return 1; 651 } 652 653 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){ 654 // printf("AVRCP: avrcp_handle_open_connection_for_role %d\n", role); 655 656 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 657 if (!packet_handler) { 658 // printf("AVRCP: avrcp_handle_open_connection_for_role %d, PH not defined\n", role); 659 return; 660 } 661 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr_for_role(role, event_addr); 662 if (!connection) { 663 // printf("AVRCP: avrcp_handle_open_connection_for_role %d, no connection found\n", role); 664 return; 665 } 666 667 if (connection->state == AVCTP_CONNECTION_OPENED) return; 668 669 if (status != ERROR_CODE_SUCCESS){ 670 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 671 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, status); 672 avrcp_finalize_connection(connection); 673 return; 674 } 675 676 connection->l2cap_signaling_cid = local_cid; 677 connection->l2cap_mtu = l2cap_mtu; 678 connection->incoming_declined = false; 679 connection->song_length_ms = 0xFFFFFFFF; 680 connection->song_position_ms = 0xFFFFFFFF; 681 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 682 683 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); 684 connection->state = AVCTP_CONNECTION_OPENED; 685 // emit twice for each role 686 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 687 } 688 689 static void avrcp_handle_close_connection_for_role(avrcp_role_t role,uint16_t local_cid){ 690 // printf("AVRCP: avrcp_handle_close_connection_for_role %d\n", role); 691 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 692 if (!packet_handler) return; 693 694 avrcp_connection_t * connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(role, local_cid); 695 if (!connection) return; 696 697 // 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); 698 699 avrcp_emit_connection_closed(packet_handler, connection->avrcp_cid); 700 avrcp_finalize_connection(connection); 701 } 702 703 static avrcp_role_t avrcp_role_from_transport_header(uint8_t transport_header){ 704 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((transport_header & 0x02) >> 1); 705 switch (frame_type){ 706 case AVRCP_COMMAND_FRAME: 707 return AVRCP_TARGET; 708 default: // AVRCP_RESPONSE_FRAME - make compiler happy 709 return AVRCP_CONTROLLER; 710 } 711 } 712 713 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 714 UNUSED(channel); 715 UNUSED(size); 716 bd_addr_t event_addr; 717 uint16_t local_cid; 718 uint16_t l2cap_mtu; 719 uint8_t status; 720 avrcp_connection_t * connection = NULL; 721 avrcp_role_t role; 722 btstack_packet_handler_t packet_handler; 723 uint8_t status_target; 724 uint8_t status_controller; 725 bool decline_connection; 726 bool outoing_active; 727 728 switch (packet_type) { 729 case L2CAP_DATA_PACKET: 730 role = avrcp_role_from_transport_header(packet[0]); 731 packet_handler = avrcp_packet_handler_for_role(role); 732 if (!packet_handler) return; 733 734 (*packet_handler)(packet_type, channel, packet, size); 735 break; 736 737 case HCI_EVENT_PACKET: 738 switch (hci_event_packet_get_type(packet)) { 739 740 case L2CAP_EVENT_INCOMING_CONNECTION: 741 l2cap_event_incoming_connection_get_address(packet, event_addr); 742 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 743 outoing_active = false; 744 connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 745 if (connection != NULL){ 746 outoing_active = true; 747 connection->incoming_declined = true; 748 } 749 750 connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 751 if (connection != NULL){ 752 outoing_active = true; 753 connection->incoming_declined = true; 754 } 755 756 decline_connection = outoing_active; 757 if (outoing_active == false){ 758 // create two connection objects (both) 759 uint16_t avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 760 761 status_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, event_addr, local_cid, avrcp_cid); 762 status_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid, avrcp_cid); 763 if (!status_target && !status_controller) { 764 decline_connection = true; 765 } 766 } 767 if (decline_connection){ 768 l2cap_decline_connection(local_cid); 769 } else { 770 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 771 l2cap_accept_connection(local_cid); 772 } 773 break; 774 775 case L2CAP_EVENT_CHANNEL_OPENED: 776 // printf("AVRCP: L2CAP_EVENT_CHANNEL_OPENED \n"); 777 l2cap_event_channel_opened_get_address(packet, event_addr); 778 status = l2cap_event_channel_opened_get_status(packet); 779 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 780 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 781 782 avrcp_handle_open_connection_for_role(AVRCP_TARGET, event_addr, local_cid, l2cap_mtu, status); 783 avrcp_handle_open_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid, l2cap_mtu, status); 784 break; 785 786 case L2CAP_EVENT_CHANNEL_CLOSED: 787 // data: event (8), len(8), channel (16) 788 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 789 avrcp_handle_close_connection_for_role(AVRCP_TARGET, local_cid); 790 avrcp_handle_close_connection_for_role(AVRCP_CONTROLLER, local_cid); 791 break; 792 793 case L2CAP_EVENT_CAN_SEND_NOW: 794 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 795 connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 796 if (connection && connection->wait_to_send){ 797 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW target\n"); 798 connection->wait_to_send = 0; 799 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 800 break; 801 } 802 803 connection = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 804 if (connection && connection->wait_to_send){ 805 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW controller\n"); 806 connection->wait_to_send = 0; 807 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 808 break; 809 } 810 break; 811 812 default: 813 break; 814 } 815 break; 816 default: 817 break; 818 } 819 } 820 821 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 822 avrcp_connection_t * connection_controller = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 823 if (!connection_controller){ 824 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 825 } 826 avrcp_connection_t * connection_target = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 827 if (!connection_target){ 828 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 829 } 830 if (connection_controller->browsing_connection){ 831 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid, 0); 832 } 833 l2cap_disconnect(connection_controller->l2cap_signaling_cid, 0); 834 return ERROR_CODE_SUCCESS; 835 } 836 837 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 838 btstack_assert(avrcp_packet_handler_for_role(AVRCP_CONTROLLER) != NULL); 839 btstack_assert(avrcp_packet_handler_for_role(AVRCP_TARGET) != NULL); 840 841 // TODO: implement delayed SDP query 842 if (sdp_client_ready() == 0){ 843 return ERROR_CODE_COMMAND_DISALLOWED; 844 } 845 846 avrcp_connection_t * connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 847 if (connection_controller){ 848 return ERROR_CODE_COMMAND_DISALLOWED; 849 } 850 avrcp_connection_t * connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 851 if (connection_target){ 852 return ERROR_CODE_COMMAND_DISALLOWED; 853 } 854 855 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 856 857 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 858 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 859 860 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 861 if (!connection_target){ 862 avrcp_finalize_connection(connection_controller); 863 return BTSTACK_MEMORY_ALLOC_FAILED; 864 } 865 866 sdp_query_context = &avrcp_controller_context; 867 868 if (avrcp_cid != NULL){ 869 *avrcp_cid = cid; 870 } 871 872 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 873 connection_controller->avrcp_cid = cid; 874 875 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 876 connection_target->avrcp_cid = cid; 877 878 sdp_query_context->avrcp_l2cap_psm = 0; 879 sdp_query_context->avrcp_version = 0; 880 sdp_query_context->avrcp_cid = cid; 881 memcpy(sdp_query_context->remote_addr, remote_addr, 6); 882 883 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 884 return ERROR_CODE_SUCCESS; 885 } 886 887 void avrcp_init(void){ 888 connections = NULL; 889 if (l2cap_service_registered) return; 890 891 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 892 if (status != ERROR_CODE_SUCCESS) return; 893 l2cap_service_registered = 1; 894 } 895 896 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 897 avrcp_controller_packet_handler = callback; 898 } 899 900 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 901 avrcp_target_packet_handler = callback; 902 } 903 904