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 /* 53 Category 1: Player/Recorder 54 Category 2: Monitor/Amplifier 55 Category 3: Tuner 56 Category 4: Menu 57 */ 58 59 /* controller supported features 60 Bit 0 = Category 1 61 Bit 1 = Category 2 62 Bit 2 = Category 3 63 Bit 3 = Category 4 64 Bit 4-5 = RFA 65 Bit 6 = Supports browsing 66 Bit 7-15 = RFA 67 The bits for supported categories are set to 1. Others are set to 0. 68 */ 69 70 /* target supported features 71 Bit 0 = Category 1 72 Bit 1 = Category 2 73 Bit 2 = Category 3 74 Bit 3 = Category 4 75 Bit 4 = Player Application Settings. Bit 0 should be set for this bit to be set. 76 Bit 5 = Group Navigation. Bit 0 should be set for this bit to be set. 77 Bit 6 = Supports browsing*4 78 Bit 7 = Supports multiple media player applications 79 Bit 8-15 = RFA 80 The bits for supported categories are set to 1. Others are set to 0. 81 */ 82 83 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 84 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 85 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 86 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 87 88 static uint16_t avrcp_cid_counter = 0; 89 90 static avrcp_context_t * sdp_query_context; 91 static int record_id = -1; 92 static uint8_t attribute_value[1000]; 93 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 94 95 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 96 97 static const char * avrcp_subunit_type_name[] = { 98 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 99 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 100 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 101 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 102 }; 103 104 const char * avrcp_subunit2str(uint16_t index){ 105 if (index <= 11) return avrcp_subunit_type_name[index]; 106 if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; 107 return avrcp_subunit_type_name[16]; 108 } 109 110 static const char * avrcp_event_name[] = { 111 "ERROR", "PLAYBACK_STATUS_CHANGED", 112 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 113 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 114 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 115 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 116 }; 117 const char * avrcp_event2str(uint16_t index){ 118 if (index <= 0x0d) return avrcp_event_name[index]; 119 return avrcp_event_name[0]; 120 } 121 122 static const char * avrcp_operation_name[] = { 123 "NOT SUPPORTED", // 0x3B 124 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 125 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 126 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 127 }; 128 const char * avrcp_operation2str(uint8_t index){ 129 if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; 130 return avrcp_operation_name[0]; 131 } 132 133 static const char * avrcp_media_attribute_id_name[] = { 134 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 135 }; 136 const char * avrcp_attribute2str(uint8_t index){ 137 if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; 138 return avrcp_media_attribute_id_name[0]; 139 } 140 141 static const char * avrcp_play_status_name[] = { 142 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 143 "ERROR" // 0xFF 144 }; 145 const char * avrcp_play_status2str(uint8_t index){ 146 if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; 147 return avrcp_play_status_name[5]; 148 } 149 150 static const char * avrcp_ctype_name[] = { 151 "CONTROL", 152 "STATUS", 153 "SPECIFIC_INQUIRY", 154 "NOTIFY", 155 "GENERAL_INQUIRY", 156 "RESERVED5", 157 "RESERVED6", 158 "RESERVED7", 159 "NOT IMPLEMENTED IN REMOTE", 160 "ACCEPTED BY REMOTE", 161 "REJECTED BY REMOTE", 162 "IN_TRANSITION", 163 "IMPLEMENTED_STABLE", 164 "CHANGED_STABLE", 165 "RESERVED", 166 "INTERIM" 167 }; 168 const char * avrcp_ctype2str(uint8_t index){ 169 if (index < sizeof(avrcp_ctype_name)){ 170 return avrcp_ctype_name[index]; 171 } 172 return "NONE"; 173 } 174 175 static const char * avrcp_shuffle_mode_name[] = { 176 "SHUFFLE OFF", 177 "SHUFFLE ALL TRACKS", 178 "SHUFFLE GROUP" 179 }; 180 181 const char * avrcp_shuffle2str(uint8_t index){ 182 if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; 183 return "NONE"; 184 } 185 186 static const char * avrcp_repeat_mode_name[] = { 187 "REPEAT OFF", 188 "REPEAT SINGLE TRACK", 189 "REPEAT ALL TRACKS", 190 "REPEAT GROUP" 191 }; 192 193 const char * avrcp_repeat2str(uint8_t index){ 194 if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; 195 return "NONE"; 196 } 197 198 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 199 uint8_t cmd_opcode_index = 5; 200 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 201 return packet[cmd_opcode_index]; 202 } 203 204 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, const char * service_name, const char * service_provider_name){ 205 uint8_t* attribute; 206 de_create_sequence(service); 207 208 // 0x0000 "Service Record Handle" 209 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 210 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 211 212 // 0x0001 "Service Class ID List" 213 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 214 attribute = de_push_sequence(service); 215 { 216 if (controller){ 217 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 218 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 219 } else { 220 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 221 } 222 } 223 de_pop_sequence(service, attribute); 224 225 // 0x0004 "Protocol Descriptor List" 226 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 227 attribute = de_push_sequence(service); 228 { 229 uint8_t* l2cpProtocol = de_push_sequence(attribute); 230 { 231 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 232 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); 233 } 234 de_pop_sequence(attribute, l2cpProtocol); 235 236 uint8_t* avctpProtocol = de_push_sequence(attribute); 237 { 238 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 239 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 240 } 241 de_pop_sequence(attribute, avctpProtocol); 242 } 243 de_pop_sequence(service, attribute); 244 245 // 0x0005 "Public Browse Group" 246 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 247 attribute = de_push_sequence(service); 248 { 249 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 250 } 251 de_pop_sequence(service, attribute); 252 253 // 0x0009 "Bluetooth Profile Descriptor List" 254 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 255 attribute = de_push_sequence(service); 256 { 257 uint8_t *avrcProfile = de_push_sequence(attribute); 258 { 259 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 260 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 261 } 262 de_pop_sequence(attribute, avrcProfile); 263 } 264 de_pop_sequence(service, attribute); 265 266 // 0x000d "Additional Bluetooth Profile Descriptor List" 267 if (browsing){ 268 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 269 attribute = de_push_sequence(service); 270 { 271 uint8_t * des = de_push_sequence(attribute); 272 { 273 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 274 { 275 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 276 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); 277 } 278 de_pop_sequence(des, browsing_l2cpProtocol); 279 280 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 281 { 282 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 283 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 284 } 285 de_pop_sequence(des, browsing_avctpProtocol); 286 } 287 de_pop_sequence(attribute, des); 288 } 289 de_pop_sequence(service, attribute); 290 } 291 292 293 // 0x0100 "Service Name" 294 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 295 if (service_name){ 296 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 297 } else { 298 if (controller){ 299 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 300 } else { 301 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 302 } 303 } 304 305 // 0x0100 "Provider Name" 306 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 307 if (service_provider_name){ 308 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 309 } else { 310 if (controller){ 311 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 312 } else { 313 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 314 } 315 } 316 317 // 0x0311 "Supported Features" 318 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 319 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 320 } 321 322 static avrcp_connection_t * get_avrcp_connection_for_bd_addr(bd_addr_t addr, avrcp_context_t * context){ 323 btstack_linked_list_iterator_t it; 324 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 325 while (btstack_linked_list_iterator_has_next(&it)){ 326 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 327 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 328 return connection; 329 } 330 return NULL; 331 } 332 333 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 334 btstack_linked_list_iterator_t it; 335 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 336 while (btstack_linked_list_iterator_has_next(&it)){ 337 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 338 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(uint16_t avrcp_cid, avrcp_context_t * context){ 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 349 if (connection->avrcp_cid != avrcp_cid) continue; 350 return connection; 351 } 352 return NULL; 353 } 354 355 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 356 connection->wait_to_send = 1; 357 l2cap_request_can_send_now_event(l2cap_cid); 358 } 359 360 361 static uint16_t avdtp_get_next_avrcp_cid(void){ 362 avrcp_cid_counter++; 363 if (avrcp_cid_counter == 0){ 364 avrcp_cid_counter = 1; 365 } 366 return avrcp_cid_counter; 367 } 368 369 static avrcp_connection_t * avrcp_create_connection(bd_addr_t remote_addr, avrcp_context_t * context){ 370 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 371 if (!connection){ 372 log_error("avrcp: not enough memory to create connection"); 373 return NULL; 374 } 375 memset(connection, 0, sizeof(avrcp_connection_t)); 376 connection->state = AVCTP_CONNECTION_IDLE; 377 connection->transaction_label = 0xFF; 378 connection->avrcp_cid = avdtp_get_next_avrcp_cid(); 379 memcpy(connection->remote_addr, remote_addr, 6); 380 btstack_linked_list_add(&context->connections, (btstack_linked_item_t *) connection); 381 return connection; 382 } 383 384 385 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 386 if (!callback) return; 387 uint8_t event[12]; 388 int pos = 0; 389 event[pos++] = HCI_EVENT_AVRCP_META; 390 event[pos++] = sizeof(event) - 2; 391 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 392 event[pos++] = status; 393 reverse_bd_addr(addr,&event[pos]); 394 pos += 6; 395 little_endian_store_16(event, pos, avrcp_cid); 396 pos += 2; 397 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 398 } 399 400 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 401 if (!callback) return; 402 uint8_t event[5]; 403 int pos = 0; 404 event[pos++] = HCI_EVENT_AVRCP_META; 405 event[pos++] = sizeof(event) - 2; 406 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 407 little_endian_store_16(event, pos, avrcp_cid); 408 pos += 2; 409 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 410 } 411 412 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 413 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->avrcp_cid, sdp_query_context); 414 if (!connection) return; 415 if (connection->state != AVCTP_SIGNALING_W4_SDP_QUERY_COMPLETE) return; 416 UNUSED(packet_type); 417 UNUSED(channel); 418 UNUSED(size); 419 uint8_t status; 420 des_iterator_t des_list_it; 421 des_iterator_t prot_it; 422 // uint32_t avdtp_remote_uuid = 0; 423 424 switch (hci_event_packet_get_type(packet)){ 425 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 426 // Handle new SDP record 427 if (sdp_event_query_attribute_byte_get_record_id(packet) != record_id) { 428 record_id = sdp_event_query_attribute_byte_get_record_id(packet); 429 // log_info("SDP Record: Nr: %d", record_id); 430 } 431 432 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 433 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 434 435 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 436 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 437 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 438 if (de_get_element_type(attribute_value) != DE_DES) break; 439 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 440 uint8_t * element = des_iterator_get_element(&des_list_it); 441 if (de_get_element_type(element) != DE_UUID) continue; 442 uint32_t uuid = de_get_uuid32(element); 443 switch (uuid){ 444 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 445 if (sdp_query_context->role == AVRCP_CONTROLLER) { 446 sdp_query_context->role_supported = 1; 447 break; 448 } 449 break; 450 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 451 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 452 if (sdp_query_context->role == AVRCP_TARGET) { 453 sdp_query_context->role_supported = 1; 454 break; 455 } 456 break; 457 default: 458 break; 459 } 460 } 461 break; 462 463 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 464 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 465 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 466 uint8_t *des_element; 467 uint8_t *element; 468 uint32_t uuid; 469 470 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 471 472 des_element = des_iterator_get_element(&des_list_it); 473 des_iterator_init(&prot_it, des_element); 474 element = des_iterator_get_element(&prot_it); 475 476 if (de_get_element_type(element) != DE_UUID) continue; 477 478 uuid = de_get_uuid32(element); 479 switch (uuid){ 480 case BLUETOOTH_PROTOCOL_L2CAP: 481 if (!des_iterator_has_more(&prot_it)) continue; 482 des_iterator_next(&prot_it); 483 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 484 break; 485 case BLUETOOTH_PROTOCOL_AVCTP: 486 if (!des_iterator_has_more(&prot_it)) continue; 487 des_iterator_next(&prot_it); 488 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 489 break; 490 default: 491 break; 492 } 493 } 494 } 495 break; 496 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 497 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 498 if (de_get_element_type(attribute_value) != DE_DES) break; 499 500 des_iterator_t des_list_0_it; 501 uint8_t *element_0; 502 503 des_iterator_init(&des_list_0_it, attribute_value); 504 element_0 = des_iterator_get_element(&des_list_0_it); 505 506 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 507 uint8_t *des_element; 508 uint8_t *element; 509 uint32_t uuid; 510 511 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 512 513 des_element = des_iterator_get_element(&des_list_it); 514 des_iterator_init(&prot_it, des_element); 515 element = des_iterator_get_element(&prot_it); 516 517 if (de_get_element_type(element) != DE_UUID) continue; 518 519 uuid = de_get_uuid32(element); 520 switch (uuid){ 521 case BLUETOOTH_PROTOCOL_L2CAP: 522 if (!des_iterator_has_more(&prot_it)) continue; 523 des_iterator_next(&prot_it); 524 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_browsing_l2cap_psm); 525 break; 526 case BLUETOOTH_PROTOCOL_AVCTP: 527 if (!des_iterator_has_more(&prot_it)) continue; 528 des_iterator_next(&prot_it); 529 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_browsing_version); 530 break; 531 default: 532 break; 533 } 534 } 535 } 536 break; 537 default: 538 break; 539 } 540 } 541 } else { 542 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)); 543 } 544 break; 545 546 case SDP_EVENT_QUERY_COMPLETE: 547 status = sdp_event_query_complete_get_status(packet); 548 if (status != ERROR_CODE_SUCCESS){ 549 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 550 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 551 btstack_memory_avrcp_connection_free(connection); 552 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 553 break; 554 } 555 556 if (!sdp_query_context->role_supported || !sdp_query_context->avrcp_l2cap_psm){ 557 connection->state = AVCTP_CONNECTION_IDLE; 558 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 559 btstack_linked_list_remove(&sdp_query_context->connections, (btstack_linked_item_t*) connection); 560 btstack_memory_avrcp_connection_free(connection); 561 break; 562 } 563 // log_info("AVRCP Control PSM 0x%02x, Browsing PSM 0x%02x", sdp_query_context->avrcp_l2cap_psm, sdp_query_context->avrcp_browsing_l2cap_psm); 564 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 565 l2cap_create_channel(sdp_query_context->packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 566 break; 567 } 568 } 569 570 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 571 UNUSED(channel); 572 UNUSED(size); 573 bd_addr_t event_addr; 574 uint16_t local_cid; 575 uint8_t status; 576 avrcp_connection_t * connection = NULL; 577 578 if (packet_type != HCI_EVENT_PACKET) return; 579 580 switch (hci_event_packet_get_type(packet)) { 581 case HCI_EVENT_DISCONNECTION_COMPLETE: 582 avrcp_emit_connection_closed(context->avrcp_callback, 0); 583 break; 584 case L2CAP_EVENT_INCOMING_CONNECTION: 585 l2cap_event_incoming_connection_get_address(packet, event_addr); 586 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 587 connection = avrcp_create_connection(event_addr, context); 588 if (!connection) { 589 log_error("Failed to alloc connection structure"); 590 l2cap_decline_connection(local_cid); 591 break; 592 } 593 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 594 connection->l2cap_signaling_cid = local_cid; 595 log_info("L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 596 l2cap_accept_connection(local_cid); 597 break; 598 599 case L2CAP_EVENT_CHANNEL_OPENED: 600 l2cap_event_channel_opened_get_address(packet, event_addr); 601 status = l2cap_event_channel_opened_get_status(packet); 602 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 603 604 connection = get_avrcp_connection_for_bd_addr(event_addr, context); 605 if (!connection){ 606 log_error("Failed to alloc AVRCP connection structure"); 607 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, BTSTACK_MEMORY_ALLOC_FAILED); 608 l2cap_disconnect(local_cid, 0); // reason isn't used 609 break; 610 } 611 if (status != ERROR_CODE_SUCCESS){ 612 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 613 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, status); 614 btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); 615 btstack_memory_avrcp_connection_free(connection); 616 break; 617 } 618 connection->l2cap_signaling_cid = local_cid; 619 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x", connection->avrcp_cid, connection->l2cap_signaling_cid); 620 connection->state = AVCTP_CONNECTION_OPENED; 621 avrcp_emit_connection_established(context->avrcp_callback, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 622 break; 623 624 case L2CAP_EVENT_CHANNEL_CLOSED: 625 // data: event (8), len(8), channel (16) 626 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 627 connection = get_avrcp_connection_for_l2cap_signaling_cid(local_cid, context); 628 if (connection){ 629 avrcp_emit_connection_closed(context->avrcp_callback, connection->avrcp_cid); 630 // free connection 631 btstack_linked_list_remove(&context->connections, (btstack_linked_item_t*) connection); 632 btstack_memory_avrcp_connection_free(connection); 633 break; 634 } 635 break; 636 default: 637 break; 638 } 639 } 640 641 uint8_t avrcp_connect(bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 642 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(bd_addr, context); 643 if (connection){ 644 return ERROR_CODE_COMMAND_DISALLOWED; 645 } 646 connection = avrcp_create_connection(bd_addr, context); 647 if (!connection){ 648 log_error("avrcp: could not allocate connection struct."); 649 return BTSTACK_MEMORY_ALLOC_FAILED; 650 } 651 652 if (!avrcp_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 653 654 *avrcp_cid = connection->avrcp_cid; 655 connection->state = AVCTP_SIGNALING_W4_SDP_QUERY_COMPLETE; 656 657 context->avrcp_l2cap_psm = 0; 658 context->avrcp_version = 0; 659 context->avrcp_cid = connection->avrcp_cid; 660 661 sdp_query_context = context; 662 663 return sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, bd_addr, BLUETOOTH_PROTOCOL_AVCTP); 664 } 665