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 btstack_packet_handler_t avrcp_callback; 68 69 static uint8_t attribute_value[45]; 70 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 71 72 static btstack_linked_list_t connections; 73 static btstack_packet_handler_t avrcp_controller_packet_handler; 74 static btstack_packet_handler_t avrcp_target_packet_handler; 75 static int l2cap_service_registered = 0; 76 77 static const char * avrcp_subunit_type_name[] = { 78 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 79 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 80 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 81 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 82 }; 83 84 const char * avrcp_subunit2str(uint16_t index){ 85 if (index <= 11) return avrcp_subunit_type_name[index]; 86 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 87 return avrcp_subunit_type_name[16]; 88 } 89 90 static const char * avrcp_event_name[] = { 91 "ERROR", "PLAYBACK_STATUS_CHANGED", 92 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 93 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 94 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 95 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 96 }; 97 const char * avrcp_event2str(uint16_t index){ 98 if (index <= 0x0d) return avrcp_event_name[index]; 99 return avrcp_event_name[0]; 100 } 101 102 static const char * avrcp_operation_name[] = { 103 "NOT SUPPORTED", // 0x3B 104 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 105 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 106 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 107 }; 108 const char * avrcp_operation2str(uint8_t index){ 109 if ((index >= 0x3B) && (index <= 0x4C)) return avrcp_operation_name[index - 0x3B]; 110 return avrcp_operation_name[0]; 111 } 112 113 static const char * avrcp_media_attribute_id_name[] = { 114 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 115 }; 116 const char * avrcp_attribute2str(uint8_t index){ 117 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 118 return avrcp_media_attribute_id_name[0]; 119 } 120 121 static const char * avrcp_play_status_name[] = { 122 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 123 "ERROR" // 0xFF 124 }; 125 const char * avrcp_play_status2str(uint8_t index){ 126 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 127 return avrcp_play_status_name[5]; 128 } 129 130 static const char * avrcp_ctype_name[] = { 131 "CONTROL", 132 "STATUS", 133 "SPECIFIC_INQUIRY", 134 "NOTIFY", 135 "GENERAL_INQUIRY", 136 "RESERVED5", 137 "RESERVED6", 138 "RESERVED7", 139 "NOT IMPLEMENTED IN REMOTE", 140 "ACCEPTED BY REMOTE", 141 "REJECTED BY REMOTE", 142 "IN_TRANSITION", 143 "IMPLEMENTED_STABLE", 144 "CHANGED_STABLE", 145 "RESERVED", 146 "INTERIM" 147 }; 148 const char * avrcp_ctype2str(uint8_t index){ 149 if (index < sizeof(avrcp_ctype_name)){ 150 return avrcp_ctype_name[index]; 151 } 152 return "NONE"; 153 } 154 155 static const char * avrcp_shuffle_mode_name[] = { 156 "SHUFFLE OFF", 157 "SHUFFLE ALL TRACKS", 158 "SHUFFLE GROUP" 159 }; 160 161 const char * avrcp_shuffle2str(uint8_t index){ 162 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 163 return "NONE"; 164 } 165 166 static const char * avrcp_repeat_mode_name[] = { 167 "REPEAT OFF", 168 "REPEAT SINGLE TRACK", 169 "REPEAT ALL TRACKS", 170 "REPEAT GROUP" 171 }; 172 173 const char * avrcp_repeat2str(uint8_t index){ 174 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 175 return "NONE"; 176 } 177 178 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 179 uint8_t cmd_opcode_index = 5; 180 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 181 return packet[cmd_opcode_index]; 182 } 183 184 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 185 const char * service_name, const char * service_provider_name){ 186 uint8_t* attribute; 187 de_create_sequence(service); 188 189 // 0x0000 "Service Record Handle" 190 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 191 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 192 193 // 0x0001 "Service Class ID List" 194 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 195 attribute = de_push_sequence(service); 196 { 197 if (controller){ 198 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 199 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 200 } else { 201 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 202 } 203 } 204 de_pop_sequence(service, attribute); 205 206 // 0x0004 "Protocol Descriptor List" 207 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 208 attribute = de_push_sequence(service); 209 { 210 uint8_t* l2cpProtocol = de_push_sequence(attribute); 211 { 212 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 213 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 214 } 215 de_pop_sequence(attribute, l2cpProtocol); 216 217 uint8_t* avctpProtocol = de_push_sequence(attribute); 218 { 219 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 220 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 221 } 222 de_pop_sequence(attribute, avctpProtocol); 223 } 224 de_pop_sequence(service, attribute); 225 226 // 0x0005 "Public Browse Group" 227 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 228 attribute = de_push_sequence(service); 229 { 230 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 231 } 232 de_pop_sequence(service, attribute); 233 234 // 0x0009 "Bluetooth Profile Descriptor List" 235 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 236 attribute = de_push_sequence(service); 237 { 238 uint8_t *avrcProfile = de_push_sequence(attribute); 239 { 240 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 241 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 242 } 243 de_pop_sequence(attribute, avrcProfile); 244 } 245 de_pop_sequence(service, attribute); 246 247 // 0x000d "Additional Bluetooth Profile Descriptor List" 248 if (browsing){ 249 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 250 attribute = de_push_sequence(service); 251 { 252 uint8_t * des = de_push_sequence(attribute); 253 { 254 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 255 { 256 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 257 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 258 } 259 de_pop_sequence(des, browsing_l2cpProtocol); 260 261 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 262 { 263 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 264 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 265 } 266 de_pop_sequence(des, browsing_avctpProtocol); 267 } 268 de_pop_sequence(attribute, des); 269 } 270 de_pop_sequence(service, attribute); 271 } 272 273 274 // 0x0100 "Service Name" 275 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 276 if (service_name){ 277 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 278 } else { 279 if (controller){ 280 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 281 } else { 282 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 283 } 284 } 285 286 // 0x0100 "Provider Name" 287 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 288 if (service_provider_name){ 289 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 290 } else { 291 if (controller){ 292 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 293 } else { 294 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 295 } 296 } 297 298 // 0x0311 "Supported Features" 299 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 300 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 301 } 302 303 avrcp_connection_t * get_avrcp_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 308 if (connection->role != role) continue; 309 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 310 return connection; 311 } 312 return NULL; 313 } 314 315 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 316 btstack_linked_list_iterator_t it; 317 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 318 while (btstack_linked_list_iterator_has_next(&it)){ 319 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 320 if (connection->role != role) continue; 321 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 322 return connection; 323 } 324 return NULL; 325 } 326 327 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 328 btstack_linked_list_iterator_t it; 329 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 330 while (btstack_linked_list_iterator_has_next(&it)){ 331 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 332 if (connection->role != role) continue; 333 if (connection->avrcp_cid != avrcp_cid) continue; 334 return connection; 335 } 336 return NULL; 337 } 338 339 avrcp_connection_t * get_avrcp_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 340 btstack_linked_list_iterator_t it; 341 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 342 while (btstack_linked_list_iterator_has_next(&it)){ 343 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 344 if (connection->role != role) continue; 345 if (connection->avrcp_browsing_cid != browsing_cid) continue; 346 return connection; 347 } 348 return NULL; 349 } 350 351 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 352 btstack_linked_list_iterator_t it; 353 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 354 while (btstack_linked_list_iterator_has_next(&it)){ 355 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 356 if (connection->role != role) continue; 357 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 358 return connection; 359 } 360 return NULL; 361 } 362 363 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 364 btstack_linked_list_iterator_t it; 365 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 366 while (btstack_linked_list_iterator_has_next(&it)){ 367 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 368 if (connection->role != role) continue; 369 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 370 return connection->browsing_connection; 371 } 372 return NULL; 373 } 374 375 static btstack_packet_handler_t avrcp_packet_handler_for_role(avrcp_role_t role){ 376 switch (role){ 377 case AVRCP_CONTROLLER: 378 return avrcp_controller_packet_handler; 379 case AVRCP_TARGET: 380 return avrcp_target_packet_handler; 381 } 382 return NULL; 383 } 384 385 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 386 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 387 connection->wait_to_send = 1; 388 l2cap_request_can_send_now_event(l2cap_cid); 389 } 390 391 392 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 393 do { 394 if (avrcp_cid_counter == 0xffff) { 395 avrcp_cid_counter = 1; 396 } else { 397 avrcp_cid_counter++; 398 } 399 } while (get_avrcp_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 400 return avrcp_cid_counter; 401 } 402 403 404 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 405 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 406 if (!connection){ 407 log_error("Not enough memory to create connection for role %d", role); 408 return NULL; 409 } 410 411 connection->state = AVCTP_CONNECTION_IDLE; 412 connection->role = role; 413 connection->transaction_label = 0xFF; 414 connection->max_num_fragments = 0xFF; 415 log_info("avrcp_create_connection, role %d, avrcp cid 0x%02x", role, connection->avrcp_cid); 416 (void)memcpy(connection->remote_addr, remote_addr, 6); 417 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 418 return connection; 419 } 420 421 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 422 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 423 btstack_memory_avrcp_connection_free(connection); 424 } 425 426 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 427 btstack_assert(avrcp_callback != NULL); 428 429 uint8_t event[12]; 430 int pos = 0; 431 event[pos++] = HCI_EVENT_AVRCP_META; 432 event[pos++] = sizeof(event) - 2; 433 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 434 event[pos++] = status; 435 reverse_bd_addr(addr,&event[pos]); 436 pos += 6; 437 little_endian_store_16(event, pos, avrcp_cid); 438 pos += 2; 439 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 440 } 441 442 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 443 btstack_assert(avrcp_callback != NULL); 444 445 uint8_t event[5]; 446 int pos = 0; 447 event[pos++] = HCI_EVENT_AVRCP_META; 448 event[pos++] = sizeof(event) - 2; 449 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 450 little_endian_store_16(event, pos, avrcp_cid); 451 pos += 2; 452 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 453 } 454 455 static void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 456 des_iterator_t des_list_it; 457 des_iterator_t prot_it; 458 459 // Handle new SDP record 460 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 461 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 462 sdp_query_context->parse_sdp_record = 0; 463 // log_info("SDP Record: Nr: %d", record_id); 464 } 465 466 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 467 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 468 469 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 470 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 471 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 472 if (de_get_element_type(attribute_value) != DE_DES) break; 473 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 474 uint8_t * element = des_iterator_get_element(&des_list_it); 475 if (de_get_element_type(element) != DE_UUID) continue; 476 uint32_t uuid = de_get_uuid32(element); 477 switch (uuid){ 478 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 479 if (sdp_query_context->role == AVRCP_CONTROLLER) { 480 sdp_query_context->parse_sdp_record = 1; 481 break; 482 } 483 break; 484 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 485 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 486 if (sdp_query_context->role == AVRCP_TARGET) { 487 sdp_query_context->parse_sdp_record = 1; 488 break; 489 } 490 break; 491 default: 492 break; 493 } 494 } 495 break; 496 497 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 498 if (!sdp_query_context->parse_sdp_record) break; 499 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 500 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 501 uint8_t *des_element; 502 uint8_t *element; 503 uint32_t uuid; 504 505 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 506 507 des_element = des_iterator_get_element(&des_list_it); 508 des_iterator_init(&prot_it, des_element); 509 element = des_iterator_get_element(&prot_it); 510 511 if (de_get_element_type(element) != DE_UUID) continue; 512 513 uuid = de_get_uuid32(element); 514 des_iterator_next(&prot_it); 515 switch (uuid){ 516 case BLUETOOTH_PROTOCOL_L2CAP: 517 if (!des_iterator_has_more(&prot_it)) continue; 518 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 519 break; 520 case BLUETOOTH_PROTOCOL_AVCTP: 521 if (!des_iterator_has_more(&prot_it)) continue; 522 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 523 break; 524 default: 525 break; 526 } 527 } 528 } 529 break; 530 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 531 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 532 if (!sdp_query_context->parse_sdp_record) break; 533 if (de_get_element_type(attribute_value) != DE_DES) break; 534 535 des_iterator_t des_list_0_it; 536 uint8_t *element_0; 537 538 des_iterator_init(&des_list_0_it, attribute_value); 539 element_0 = des_iterator_get_element(&des_list_0_it); 540 541 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 542 uint8_t *des_element; 543 uint8_t *element; 544 uint32_t uuid; 545 546 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 547 548 des_element = des_iterator_get_element(&des_list_it); 549 des_iterator_init(&prot_it, des_element); 550 element = des_iterator_get_element(&prot_it); 551 552 if (de_get_element_type(element) != DE_UUID) continue; 553 554 uuid = de_get_uuid32(element); 555 des_iterator_next(&prot_it); 556 switch (uuid){ 557 case BLUETOOTH_PROTOCOL_L2CAP: 558 if (!des_iterator_has_more(&prot_it)) continue; 559 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->browsing_l2cap_psm); 560 break; 561 case BLUETOOTH_PROTOCOL_AVCTP: 562 if (!des_iterator_has_more(&prot_it)) continue; 563 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->browsing_version); 564 break; 565 default: 566 break; 567 } 568 } 569 } 570 break; 571 default: 572 break; 573 } 574 } 575 } else { 576 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)); 577 } 578 } 579 580 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 581 if (connection == NULL) return; 582 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 583 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, status); 584 avrcp_finalize_connection(connection); 585 } 586 587 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection, uint16_t browsing_l2cap_psm, uint16_t browsing_version){ 588 if (connection == NULL) return; 589 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 590 connection->browsing_version = browsing_version; 591 connection->browsing_l2cap_psm = browsing_l2cap_psm; 592 } 593 594 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 595 UNUSED(packet_type); 596 UNUSED(channel); 597 UNUSED(size); 598 599 avrcp_connection_t * avrcp_target_connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, sdp_query_context->remote_addr); 600 avrcp_connection_t * avrcp_controller_connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, sdp_query_context->remote_addr); 601 602 uint8_t status; 603 604 switch (hci_event_packet_get_type(packet)){ 605 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 606 avrcp_handle_sdp_client_query_attribute_value(packet); 607 break; 608 609 case SDP_EVENT_QUERY_COMPLETE: 610 status = sdp_event_query_complete_get_status(packet); 611 612 if (status != ERROR_CODE_SUCCESS){ 613 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 614 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 615 break; 616 } 617 618 if (!sdp_query_context->avrcp_l2cap_psm){ 619 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 620 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 621 break; 622 } 623 624 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection, sdp_query_context->browsing_l2cap_psm, sdp_query_context->browsing_version); 625 avrcp_handle_sdp_query_succeeded(avrcp_target_connection, sdp_query_context->browsing_l2cap_psm, sdp_query_context->browsing_version); 626 627 l2cap_create_channel(&avrcp_packet_handler, sdp_query_context->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 628 break; 629 630 default: 631 break; 632 633 } 634 } 635 636 637 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){ 638 if (!avrcp_packet_handler_for_role(role)) { 639 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, PH not defined\n", role); 640 return 0; 641 } 642 643 avrcp_connection_t * connection = avrcp_create_connection(role, event_addr); 644 645 if (!connection) { 646 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, no connection created\n", role); 647 return 0 ; 648 } 649 650 // printf("AVRCP: AVCTP_CONNECTION_W4_L2CAP_CONNECTED, role %d\n", role); 651 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 652 connection->l2cap_signaling_cid = local_cid; 653 connection->avrcp_cid = avrcp_cid; 654 return 1; 655 } 656 657 static void avrcp_handle_open_connection_for_role( avrcp_connection_t * connection, uint16_t local_cid, uint16_t l2cap_mtu){ 658 connection->l2cap_signaling_cid = local_cid; 659 connection->l2cap_mtu = l2cap_mtu; 660 connection->incoming_declined = false; 661 connection->song_length_ms = 0xFFFFFFFF; 662 connection->song_position_ms = 0xFFFFFFFF; 663 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 664 connection->state = AVCTP_CONNECTION_OPENED; 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 } 668 669 static avrcp_role_t avrcp_role_from_transport_header(uint8_t transport_header){ 670 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((transport_header & 0x02) >> 1); 671 switch (frame_type){ 672 case AVRCP_COMMAND_FRAME: 673 return AVRCP_TARGET; 674 default: // AVRCP_RESPONSE_FRAME - make compiler happy 675 return AVRCP_CONTROLLER; 676 } 677 } 678 679 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 680 UNUSED(channel); 681 UNUSED(size); 682 bd_addr_t event_addr; 683 uint16_t local_cid; 684 uint16_t l2cap_mtu; 685 uint8_t status; 686 avrcp_role_t role; 687 btstack_packet_handler_t packet_handler; 688 uint8_t status_target; 689 uint8_t status_controller; 690 bool decline_connection; 691 bool outoing_active; 692 693 avrcp_connection_t * connection_controller; 694 avrcp_connection_t * connection_target; 695 696 switch (packet_type) { 697 case L2CAP_DATA_PACKET: 698 role = avrcp_role_from_transport_header(packet[0]); 699 packet_handler = avrcp_packet_handler_for_role(role); 700 if (!packet_handler) return; 701 702 (*packet_handler)(packet_type, channel, packet, size); 703 break; 704 705 case HCI_EVENT_PACKET: 706 switch (hci_event_packet_get_type(packet)) { 707 708 case L2CAP_EVENT_INCOMING_CONNECTION: 709 l2cap_event_incoming_connection_get_address(packet, event_addr); 710 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 711 outoing_active = false; 712 713 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 714 if (connection_target != NULL){ 715 outoing_active = true; 716 connection_target->incoming_declined = true; 717 } 718 719 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 720 if (connection_controller != NULL){ 721 outoing_active = true; 722 connection_controller->incoming_declined = true; 723 } 724 725 decline_connection = outoing_active; 726 if (outoing_active == false){ 727 // create two connection objects (both) 728 uint16_t avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 729 730 status_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, event_addr, local_cid, avrcp_cid); 731 status_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid, avrcp_cid); 732 if (!status_target && !status_controller) { 733 decline_connection = true; 734 } 735 } 736 if (decline_connection){ 737 l2cap_decline_connection(local_cid); 738 } else { 739 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 740 l2cap_accept_connection(local_cid); 741 } 742 break; 743 744 case L2CAP_EVENT_CHANNEL_OPENED: 745 // printf("AVRCP: L2CAP_EVENT_CHANNEL_OPENED \n"); 746 l2cap_event_channel_opened_get_address(packet, event_addr); 747 status = l2cap_event_channel_opened_get_status(packet); 748 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 749 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 750 751 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 752 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 753 if ((connection_controller == NULL) || (connection_target == NULL)) { 754 break; 755 } 756 757 if (status != ERROR_CODE_SUCCESS){ 758 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 759 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, status); 760 avrcp_finalize_connection(connection_controller); 761 avrcp_finalize_connection(connection_target); 762 return; 763 } 764 765 avrcp_handle_open_connection_for_role(connection_target, local_cid, l2cap_mtu); 766 avrcp_handle_open_connection_for_role(connection_controller, local_cid, l2cap_mtu); 767 768 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, status); 769 break; 770 771 case L2CAP_EVENT_CHANNEL_CLOSED: 772 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 773 774 connection_controller = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 775 connection_target = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 776 if ((connection_controller == NULL) || (connection_target == NULL)) { 777 break; 778 } 779 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 780 avrcp_finalize_connection(connection_controller); 781 782 avrcp_emit_connection_closed(connection_target->avrcp_cid); 783 avrcp_finalize_connection(connection_target); 784 break; 785 786 case L2CAP_EVENT_CAN_SEND_NOW: 787 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 788 connection_target = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 789 if (connection_target && connection_target->wait_to_send){ 790 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW target\n"); 791 connection_target->wait_to_send = 0; 792 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 793 break; 794 } 795 796 connection_controller = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 797 if (connection_controller && connection_controller->wait_to_send){ 798 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW controller\n"); 799 connection_controller->wait_to_send = 0; 800 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 801 break; 802 } 803 break; 804 805 default: 806 break; 807 } 808 break; 809 default: 810 break; 811 } 812 } 813 814 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 815 avrcp_connection_t * connection_controller = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 816 if (!connection_controller){ 817 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 818 } 819 avrcp_connection_t * connection_target = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 820 if (!connection_target){ 821 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 822 } 823 if (connection_controller->browsing_connection){ 824 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid, 0); 825 } 826 l2cap_disconnect(connection_controller->l2cap_signaling_cid, 0); 827 return ERROR_CODE_SUCCESS; 828 } 829 830 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 831 btstack_assert(avrcp_packet_handler_for_role(AVRCP_CONTROLLER) != NULL); 832 btstack_assert(avrcp_packet_handler_for_role(AVRCP_TARGET) != NULL); 833 834 // TODO: implement delayed SDP query 835 if (sdp_client_ready() == 0){ 836 return ERROR_CODE_COMMAND_DISALLOWED; 837 } 838 839 avrcp_connection_t * connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 840 if (connection_controller){ 841 return ERROR_CODE_COMMAND_DISALLOWED; 842 } 843 avrcp_connection_t * connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 844 if (connection_target){ 845 return ERROR_CODE_COMMAND_DISALLOWED; 846 } 847 848 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 849 850 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 851 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 852 853 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 854 if (!connection_target){ 855 avrcp_finalize_connection(connection_controller); 856 return BTSTACK_MEMORY_ALLOC_FAILED; 857 } 858 859 sdp_query_context = &avrcp_controller_context; 860 861 if (avrcp_cid != NULL){ 862 *avrcp_cid = cid; 863 } 864 865 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 866 connection_controller->avrcp_cid = cid; 867 868 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 869 connection_target->avrcp_cid = cid; 870 871 sdp_query_context->avrcp_l2cap_psm = 0; 872 sdp_query_context->avrcp_version = 0; 873 sdp_query_context->avrcp_cid = cid; 874 memcpy(sdp_query_context->remote_addr, remote_addr, 6); 875 876 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 877 return ERROR_CODE_SUCCESS; 878 } 879 880 void avrcp_init(void){ 881 connections = NULL; 882 if (l2cap_service_registered) return; 883 884 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 885 if (status != ERROR_CODE_SUCCESS) return; 886 l2cap_service_registered = 1; 887 } 888 889 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 890 avrcp_controller_packet_handler = callback; 891 } 892 893 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 894 avrcp_target_packet_handler = callback; 895 } 896 897 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 898 btstack_assert(callback != NULL); 899 avrcp_callback = callback; 900 } 901