1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define __BTSTACK_FILE__ "avrcp.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_controller.h" 48 49 #define PSM_AVCTP BLUETOOTH_PROTOCOL_AVCTP 50 #define PSM_AVCTP_BROWSING 0x001b 51 52 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 53 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 54 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 55 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 56 57 static uint16_t avrcp_cid_counter = 0; 58 59 static avrcp_context_t * sdp_query_context; 60 static uint8_t attribute_value[1000]; 61 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 62 63 static btstack_linked_list_t connections; 64 65 static const char * avrcp_subunit_type_name[] = { 66 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 67 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 68 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 69 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 70 }; 71 72 const char * avrcp_subunit2str(uint16_t index){ 73 if (index <= 11) return avrcp_subunit_type_name[index]; 74 if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; 75 return avrcp_subunit_type_name[16]; 76 } 77 78 static const char * avrcp_event_name[] = { 79 "ERROR", "PLAYBACK_STATUS_CHANGED", 80 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 81 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 82 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 83 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 84 }; 85 const char * avrcp_event2str(uint16_t index){ 86 if (index <= 0x0d) return avrcp_event_name[index]; 87 return avrcp_event_name[0]; 88 } 89 90 static const char * avrcp_operation_name[] = { 91 "NOT SUPPORTED", // 0x3B 92 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 93 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 94 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 95 }; 96 const char * avrcp_operation2str(uint8_t index){ 97 if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; 98 return avrcp_operation_name[0]; 99 } 100 101 static const char * avrcp_media_attribute_id_name[] = { 102 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 103 }; 104 const char * avrcp_attribute2str(uint8_t index){ 105 if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; 106 return avrcp_media_attribute_id_name[0]; 107 } 108 109 static const char * avrcp_play_status_name[] = { 110 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 111 "ERROR" // 0xFF 112 }; 113 const char * avrcp_play_status2str(uint8_t index){ 114 if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; 115 return avrcp_play_status_name[5]; 116 } 117 118 static const char * avrcp_ctype_name[] = { 119 "CONTROL", 120 "STATUS", 121 "SPECIFIC_INQUIRY", 122 "NOTIFY", 123 "GENERAL_INQUIRY", 124 "RESERVED5", 125 "RESERVED6", 126 "RESERVED7", 127 "NOT IMPLEMENTED IN REMOTE", 128 "ACCEPTED BY REMOTE", 129 "REJECTED BY REMOTE", 130 "IN_TRANSITION", 131 "IMPLEMENTED_STABLE", 132 "CHANGED_STABLE", 133 "RESERVED", 134 "INTERIM" 135 }; 136 const char * avrcp_ctype2str(uint8_t index){ 137 if (index < sizeof(avrcp_ctype_name)){ 138 return avrcp_ctype_name[index]; 139 } 140 return "NONE"; 141 } 142 143 static const char * avrcp_shuffle_mode_name[] = { 144 "SHUFFLE OFF", 145 "SHUFFLE ALL TRACKS", 146 "SHUFFLE GROUP" 147 }; 148 149 const char * avrcp_shuffle2str(uint8_t index){ 150 if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; 151 return "NONE"; 152 } 153 154 static const char * avrcp_repeat_mode_name[] = { 155 "REPEAT OFF", 156 "REPEAT SINGLE TRACK", 157 "REPEAT ALL TRACKS", 158 "REPEAT GROUP" 159 }; 160 161 const char * avrcp_repeat2str(uint8_t index){ 162 if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; 163 return "NONE"; 164 } 165 166 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 167 uint8_t cmd_opcode_index = 5; 168 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 169 return packet[cmd_opcode_index]; 170 } 171 172 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 173 const char * service_name, const char * service_provider_name){ 174 uint8_t* attribute; 175 de_create_sequence(service); 176 177 // 0x0000 "Service Record Handle" 178 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 179 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 180 181 // 0x0001 "Service Class ID List" 182 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 183 attribute = de_push_sequence(service); 184 { 185 if (controller){ 186 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 187 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 188 } else { 189 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 190 } 191 } 192 de_pop_sequence(service, attribute); 193 194 // 0x0004 "Protocol Descriptor List" 195 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 196 attribute = de_push_sequence(service); 197 { 198 uint8_t* l2cpProtocol = de_push_sequence(attribute); 199 { 200 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 201 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); 202 } 203 de_pop_sequence(attribute, l2cpProtocol); 204 205 uint8_t* avctpProtocol = de_push_sequence(attribute); 206 { 207 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 208 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 209 } 210 de_pop_sequence(attribute, avctpProtocol); 211 } 212 de_pop_sequence(service, attribute); 213 214 // 0x0005 "Public Browse Group" 215 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 216 attribute = de_push_sequence(service); 217 { 218 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 219 } 220 de_pop_sequence(service, attribute); 221 222 // 0x0009 "Bluetooth Profile Descriptor List" 223 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 224 attribute = de_push_sequence(service); 225 { 226 uint8_t *avrcProfile = de_push_sequence(attribute); 227 { 228 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 229 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 230 } 231 de_pop_sequence(attribute, avrcProfile); 232 } 233 de_pop_sequence(service, attribute); 234 235 // 0x000d "Additional Bluetooth Profile Descriptor List" 236 if (browsing){ 237 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 238 attribute = de_push_sequence(service); 239 { 240 uint8_t * des = de_push_sequence(attribute); 241 { 242 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 243 { 244 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 245 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); 246 } 247 de_pop_sequence(des, browsing_l2cpProtocol); 248 249 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 250 { 251 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 252 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 253 } 254 de_pop_sequence(des, browsing_avctpProtocol); 255 } 256 de_pop_sequence(attribute, des); 257 } 258 de_pop_sequence(service, attribute); 259 } 260 261 262 // 0x0100 "Service Name" 263 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 264 if (service_name){ 265 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 266 } else { 267 if (controller){ 268 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 269 } else { 270 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 271 } 272 } 273 274 // 0x0100 "Provider Name" 275 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 276 if (service_provider_name){ 277 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 278 } else { 279 if (controller){ 280 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 281 } else { 282 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 283 } 284 } 285 286 // 0x0311 "Supported Features" 287 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 288 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 289 } 290 291 avrcp_connection_t * get_avrcp_connection_for_bd_addr(bd_addr_t addr){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 296 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 297 return connection; 298 } 299 return NULL; 300 } 301 302 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid){ 303 btstack_linked_list_iterator_t it; 304 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 305 while (btstack_linked_list_iterator_has_next(&it)){ 306 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 307 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 308 return connection; 309 } 310 return NULL; 311 } 312 313 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(uint16_t avrcp_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->avrcp_cid != avrcp_cid) continue; 319 return connection; 320 } 321 return NULL; 322 } 323 324 avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid){ 325 btstack_linked_list_iterator_t it; 326 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 327 while (btstack_linked_list_iterator_has_next(&it)){ 328 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 329 if (connection->avrcp_browsing_cid != browsing_cid) continue; 330 return connection; 331 } 332 return NULL; 333 } 334 335 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid){ 336 btstack_linked_list_iterator_t it; 337 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 338 while (btstack_linked_list_iterator_has_next(&it)){ 339 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 340 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 341 return connection; 342 } 343 return NULL; 344 } 345 346 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid){ 347 btstack_linked_list_iterator_t it; 348 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 349 while (btstack_linked_list_iterator_has_next(&it)){ 350 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 351 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 352 return connection->browsing_connection; 353 } 354 return NULL; 355 } 356 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 357 connection->wait_to_send = 1; 358 l2cap_request_can_send_now_event(l2cap_cid); 359 } 360 361 362 uint16_t avrcp_get_next_cid(void){ 363 avrcp_cid_counter++; 364 if (avrcp_cid_counter == 0){ 365 avrcp_cid_counter = 1; 366 } 367 return avrcp_cid_counter; 368 } 369 370 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 371 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 372 if (!connection){ 373 log_error("avrcp: not enough memory to create connection"); 374 return NULL; 375 } 376 connection->role = role; 377 connection->state = AVCTP_CONNECTION_IDLE; 378 connection->transaction_label = 0xFF; 379 connection->max_num_fragments = 0xFF; 380 connection->avrcp_cid = avrcp_get_next_cid(); 381 memcpy(connection->remote_addr, remote_addr, 6); 382 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 383 return connection; 384 } 385 386 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 387 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 388 btstack_memory_avrcp_connection_free(connection); 389 } 390 391 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 392 if (!callback) return; 393 uint8_t event[12]; 394 int pos = 0; 395 event[pos++] = HCI_EVENT_AVRCP_META; 396 event[pos++] = sizeof(event) - 2; 397 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 398 event[pos++] = status; 399 reverse_bd_addr(addr,&event[pos]); 400 pos += 6; 401 little_endian_store_16(event, pos, avrcp_cid); 402 pos += 2; 403 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 404 } 405 406 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 407 if (!callback) return; 408 uint8_t event[5]; 409 int pos = 0; 410 event[pos++] = HCI_EVENT_AVRCP_META; 411 event[pos++] = sizeof(event) - 2; 412 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 413 little_endian_store_16(event, pos, avrcp_cid); 414 pos += 2; 415 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 416 } 417 418 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 419 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->avrcp_cid); 420 if (!connection) return; 421 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 422 423 UNUSED(packet_type); 424 UNUSED(channel); 425 UNUSED(size); 426 uint8_t status; 427 des_iterator_t des_list_it; 428 des_iterator_t prot_it; 429 // uint32_t avdtp_remote_uuid = 0; 430 431 switch (hci_event_packet_get_type(packet)){ 432 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 433 // Handle new SDP record 434 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 435 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 436 sdp_query_context->parse_sdp_record = 0; 437 // log_info("SDP Record: Nr: %d", record_id); 438 } 439 440 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 441 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 442 443 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 444 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 445 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 446 if (de_get_element_type(attribute_value) != DE_DES) break; 447 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 448 uint8_t * element = des_iterator_get_element(&des_list_it); 449 if (de_get_element_type(element) != DE_UUID) continue; 450 uint32_t uuid = de_get_uuid32(element); 451 switch (uuid){ 452 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 453 if (sdp_query_context->role == AVRCP_CONTROLLER) { 454 sdp_query_context->parse_sdp_record = 1; 455 break; 456 } 457 break; 458 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 459 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 460 if (sdp_query_context->role == AVRCP_TARGET) { 461 sdp_query_context->parse_sdp_record = 1; 462 break; 463 } 464 break; 465 default: 466 break; 467 } 468 } 469 break; 470 471 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 472 if (!sdp_query_context->parse_sdp_record) break; 473 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 474 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 475 uint8_t *des_element; 476 uint8_t *element; 477 uint32_t uuid; 478 479 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 480 481 des_element = des_iterator_get_element(&des_list_it); 482 des_iterator_init(&prot_it, des_element); 483 element = des_iterator_get_element(&prot_it); 484 485 if (de_get_element_type(element) != DE_UUID) continue; 486 487 uuid = de_get_uuid32(element); 488 des_iterator_next(&prot_it); 489 switch (uuid){ 490 case BLUETOOTH_PROTOCOL_L2CAP: 491 if (!des_iterator_has_more(&prot_it)) continue; 492 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 493 break; 494 case BLUETOOTH_PROTOCOL_AVCTP: 495 if (!des_iterator_has_more(&prot_it)) continue; 496 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 497 break; 498 default: 499 break; 500 } 501 } 502 } 503 break; 504 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 505 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 506 if (!sdp_query_context->parse_sdp_record) break; 507 if (de_get_element_type(attribute_value) != DE_DES) break; 508 509 des_iterator_t des_list_0_it; 510 uint8_t *element_0; 511 512 des_iterator_init(&des_list_0_it, attribute_value); 513 element_0 = des_iterator_get_element(&des_list_0_it); 514 515 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 516 uint8_t *des_element; 517 uint8_t *element; 518 uint32_t uuid; 519 520 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 521 522 des_element = des_iterator_get_element(&des_list_it); 523 des_iterator_init(&prot_it, des_element); 524 element = des_iterator_get_element(&prot_it); 525 526 if (de_get_element_type(element) != DE_UUID) continue; 527 528 uuid = de_get_uuid32(element); 529 des_iterator_next(&prot_it); 530 switch (uuid){ 531 case BLUETOOTH_PROTOCOL_L2CAP: 532 if (!des_iterator_has_more(&prot_it)) continue; 533 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_l2cap_psm); 534 break; 535 case BLUETOOTH_PROTOCOL_AVCTP: 536 if (!des_iterator_has_more(&prot_it)) continue; 537 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); 538 break; 539 default: 540 break; 541 } 542 } 543 } 544 break; 545 default: 546 break; 547 } 548 } 549 } else { 550 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)); 551 } 552 break; 553 554 case SDP_EVENT_QUERY_COMPLETE:{ 555 status = sdp_event_query_complete_get_status(packet); 556 557 if (status != ERROR_CODE_SUCCESS){ 558 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 559 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 560 avrcp_finalize_connection(connection); 561 break; 562 } 563 564 if (!sdp_query_context->avrcp_l2cap_psm){ 565 connection->state = AVCTP_CONNECTION_IDLE; 566 log_info("AVRCP: no suitable service found"); 567 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 568 avrcp_finalize_connection(connection); 569 break; 570 } 571 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 572 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 573 break; 574 } 575 } 576 } 577 578 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 579 UNUSED(channel); 580 UNUSED(size); 581 bd_addr_t event_addr; 582 uint16_t local_cid; 583 uint8_t status; 584 avrcp_connection_t * connection = NULL; 585 uint16_t psm; 586 587 if (packet_type != HCI_EVENT_PACKET) return; 588 589 switch (hci_event_packet_get_type(packet)) { 590 case HCI_EVENT_DISCONNECTION_COMPLETE: 591 avrcp_emit_connection_closed(context->avrcp_callback, 0); 592 break; 593 case L2CAP_EVENT_INCOMING_CONNECTION: 594 l2cap_event_incoming_connection_get_address(packet, event_addr); 595 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 596 connection = avrcp_create_connection(context->role, event_addr); 597 if (!connection) { 598 log_error("Failed to alloc connection structure"); 599 l2cap_decline_connection(local_cid); 600 break; 601 } 602 603 psm = l2cap_event_incoming_connection_get_psm(packet); 604 if (psm == PSM_AVCTP){ 605 if (!connection->l2cap_signaling_cid){ 606 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 607 connection->l2cap_signaling_cid = local_cid; 608 log_info("L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 609 l2cap_accept_connection(local_cid); 610 break; 611 } 612 } 613 log_info("L2CAP_EVENT_INCOMING_CONNECTION local_cid 0x%02x, psm 0x%2x, decline connection", local_cid, psm); 614 l2cap_decline_connection(local_cid); 615 break; 616 617 case L2CAP_EVENT_CHANNEL_OPENED: 618 l2cap_event_channel_opened_get_address(packet, event_addr); 619 status = l2cap_event_channel_opened_get_status(packet); 620 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 621 622 connection = get_avrcp_connection_for_bd_addr(event_addr); 623 if (!connection){ 624 // TODO: validate if this cannot happen. If not, drop disconnect call 625 log_error("AVRCP connection lookup failed"); 626 l2cap_disconnect(local_cid, 0); // reason isn't used 627 break; 628 } 629 if (status != ERROR_CODE_SUCCESS){ 630 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 631 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, status); 632 avrcp_finalize_connection(connection); 633 break; 634 } 635 636 psm = l2cap_event_channel_opened_get_psm(packet); 637 if (psm == PSM_AVCTP){ 638 connection->l2cap_signaling_cid = local_cid; 639 connection->l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 640 connection->song_length_ms = 0xFFFFFFFF; 641 connection->song_position_ms = 0xFFFFFFFF; 642 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 643 644 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 645 connection->state = AVCTP_CONNECTION_OPENED; 646 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 647 } 648 break; 649 650 case L2CAP_EVENT_CHANNEL_CLOSED: 651 // data: event (8), len(8), channel (16) 652 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 653 connection = get_avrcp_connection_for_l2cap_signaling_cid(local_cid); 654 if (connection){ 655 avrcp_emit_connection_closed(context->avrcp_callback, connection->avrcp_cid); 656 avrcp_finalize_connection(connection); 657 break; 658 } 659 break; 660 default: 661 break; 662 } 663 } 664 665 uint8_t avrcp_connect(avrcp_role_t role, bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 666 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(bd_addr); 667 if (connection) return ERROR_CODE_COMMAND_DISALLOWED; 668 669 if (!sdp_client_ready()) return ERROR_CODE_COMMAND_DISALLOWED; 670 671 connection = avrcp_create_connection(role, bd_addr); 672 if (!connection){ 673 log_error("avrcp: could not allocate connection struct."); 674 return BTSTACK_MEMORY_ALLOC_FAILED; 675 } 676 677 if (avrcp_cid){ 678 *avrcp_cid = connection->avrcp_cid; 679 } 680 681 context->avrcp_l2cap_psm = 0; 682 context->avrcp_version = 0; 683 context->avrcp_cid = connection->avrcp_cid; 684 connection->browsing_l2cap_psm = 0; 685 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 686 687 sdp_query_context = context; 688 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 689 return ERROR_CODE_SUCCESS; 690 } 691 692 void avrcp_init(void){ 693 connections = NULL; 694 } 695