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 BLUEKITCHEN 24 * GMBH 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 // snprintf 43 #include <stdio.h> 44 45 #include "bluetooth_psm.h" 46 #include "bluetooth_sdp.h" 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "btstack_memory.h" 50 #include "classic/sdp_client.h" 51 #include "classic/sdp_util.h" 52 #include "classic/avrcp.h" 53 54 55 typedef struct { 56 uint8_t parse_sdp_record; 57 uint32_t record_id; 58 uint16_t avrcp_cid; 59 uint16_t avrcp_l2cap_psm; 60 uint16_t avrcp_version; 61 62 uint16_t browsing_l2cap_psm; 63 uint16_t browsing_version; 64 } avrcp_sdp_query_context_t; 65 66 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 static const char * avrcp_default_controller_service_name = "BTstack AVRCP Controller Service"; 69 static const char * avrcp_default_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 70 static const char * avrcp_defaul_target_service_name = "BTstack AVRCP Target Service"; 71 static const char * avrcp_default_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 72 73 static const char * avrcp_subunit_type_name[] = { 74 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 75 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 76 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 77 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 78 }; 79 80 // default subunit info: single PANEL subunit 81 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 82 83 // globals 84 static bool avrcp_l2cap_service_registered = false; 85 86 // connections 87 static uint16_t avrcp_cid_counter; 88 static btstack_linked_list_t avrcp_connections; 89 90 // higher layer callbacks 91 static btstack_packet_handler_t avrcp_callback; 92 static btstack_packet_handler_t avrcp_controller_packet_handler; 93 static btstack_packet_handler_t avrcp_target_packet_handler; 94 95 // sdp query 96 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 97 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 98 static uint8_t avrcp_sdp_query_attribute_value[45]; 99 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 100 101 102 const char * avrcp_subunit2str(uint16_t index){ 103 if (index <= 11) return avrcp_subunit_type_name[index]; 104 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 105 return avrcp_subunit_type_name[16]; 106 } 107 108 static const char * avrcp_event_name[] = { 109 "ERROR", "PLAYBACK_STATUS_CHANGED", 110 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 111 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 112 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 113 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 114 }; 115 const char * avrcp_event2str(uint16_t index){ 116 if (index <= 0x0d) return avrcp_event_name[index]; 117 return avrcp_event_name[0]; 118 } 119 120 static const char * avrcp_operation_name[] = { 121 "SKIP", NULL, NULL, NULL, NULL, 122 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 123 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 124 }; 125 126 const char * avrcp_operation2str(uint8_t operation_id){ 127 char * name = NULL; 128 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 129 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 130 } 131 if (name == NULL){ 132 static char buffer[13]; 133 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 134 buffer[sizeof(buffer)-1] = 0; 135 return buffer; 136 } else { 137 return name; 138 } 139 } 140 141 static const char * avrcp_media_attribute_id_name[] = { 142 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 143 }; 144 const char * avrcp_attribute2str(uint8_t index){ 145 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 146 return avrcp_media_attribute_id_name[0]; 147 } 148 149 static const char * avrcp_play_status_name[] = { 150 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 151 "ERROR" // 0xFF 152 }; 153 const char * avrcp_play_status2str(uint8_t index){ 154 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 155 return avrcp_play_status_name[5]; 156 } 157 158 static const char * avrcp_ctype_name[] = { 159 "CONTROL", 160 "STATUS", 161 "SPECIFIC_INQUIRY", 162 "NOTIFY", 163 "GENERAL_INQUIRY", 164 "RESERVED5", 165 "RESERVED6", 166 "RESERVED7", 167 "NOT IMPLEMENTED IN REMOTE", 168 "ACCEPTED BY REMOTE", 169 "REJECTED BY REMOTE", 170 "IN_TRANSITION", 171 "IMPLEMENTED_STABLE", 172 "CHANGED_STABLE", 173 "RESERVED", 174 "INTERIM" 175 }; 176 const char * avrcp_ctype2str(uint8_t index){ 177 if (index < sizeof(avrcp_ctype_name)){ 178 return avrcp_ctype_name[index]; 179 } 180 return "NONE"; 181 } 182 183 static const char * avrcp_shuffle_mode_name[] = { 184 "SHUFFLE OFF", 185 "SHUFFLE ALL TRACKS", 186 "SHUFFLE GROUP" 187 }; 188 189 const char * avrcp_shuffle2str(uint8_t index){ 190 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 191 return "NONE"; 192 } 193 194 static const char * avrcp_repeat_mode_name[] = { 195 "REPEAT OFF", 196 "REPEAT SINGLE TRACK", 197 "REPEAT ALL TRACKS", 198 "REPEAT GROUP" 199 }; 200 201 const char * avrcp_repeat2str(uint8_t index){ 202 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 203 return "NONE"; 204 } 205 206 btstack_linked_list_t avrcp_get_connections(void){ 207 return avrcp_connections; 208 } 209 210 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 211 uint8_t cmd_opcode_index = 5; 212 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 213 return packet[cmd_opcode_index]; 214 } 215 216 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 217 const char * service_name, const char * service_provider_name){ 218 uint8_t* attribute; 219 de_create_sequence(service); 220 221 // 0x0000 "Service Record Handle" 222 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 223 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 224 225 // 0x0001 "Service Class ID List" 226 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 227 attribute = de_push_sequence(service); 228 { 229 if (controller){ 230 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 231 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 232 } else { 233 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 234 } 235 } 236 de_pop_sequence(service, attribute); 237 238 // 0x0004 "Protocol Descriptor List" 239 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 240 attribute = de_push_sequence(service); 241 { 242 uint8_t* l2cpProtocol = de_push_sequence(attribute); 243 { 244 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 245 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 246 } 247 de_pop_sequence(attribute, l2cpProtocol); 248 249 uint8_t* avctpProtocol = de_push_sequence(attribute); 250 { 251 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 252 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 253 } 254 de_pop_sequence(attribute, avctpProtocol); 255 } 256 de_pop_sequence(service, attribute); 257 258 // 0x0005 "Public Browse Group" 259 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 260 attribute = de_push_sequence(service); 261 { 262 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 263 } 264 de_pop_sequence(service, attribute); 265 266 // 0x0009 "Bluetooth Profile Descriptor List" 267 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 268 attribute = de_push_sequence(service); 269 { 270 uint8_t *avrcProfile = de_push_sequence(attribute); 271 { 272 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 273 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 274 } 275 de_pop_sequence(attribute, avrcProfile); 276 } 277 de_pop_sequence(service, attribute); 278 279 // 0x000d "Additional Bluetooth Profile Descriptor List" 280 if (browsing){ 281 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 282 attribute = de_push_sequence(service); 283 { 284 uint8_t * des = de_push_sequence(attribute); 285 { 286 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 287 { 288 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 289 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 290 } 291 de_pop_sequence(des, browsing_l2cpProtocol); 292 293 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 294 { 295 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 296 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 297 } 298 de_pop_sequence(des, browsing_avctpProtocol); 299 } 300 de_pop_sequence(attribute, des); 301 } 302 de_pop_sequence(service, attribute); 303 } 304 305 306 // 0x0100 "Service Name" 307 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 308 if (service_name){ 309 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 310 } else { 311 if (controller){ 312 de_add_data(service, DE_STRING, strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 313 } else { 314 de_add_data(service, DE_STRING, strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 315 } 316 } 317 318 // 0x0100 "Provider Name" 319 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 320 if (service_provider_name){ 321 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 322 } else { 323 if (controller){ 324 de_add_data(service, DE_STRING, strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 325 } else { 326 de_add_data(service, DE_STRING, strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 327 } 328 } 329 330 // 0x0311 "Supported Features" 331 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 332 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 333 } 334 335 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 336 switch (avctp_packet_type){ 337 case AVCTP_SINGLE_PACKET: 338 // AVCTP message: transport header (1), pid (2) 339 return 3; 340 case AVCTP_START_PACKET: 341 // AVCTP message: transport header (1), num_packets (1), pid (2) 342 return 4; 343 default: 344 // AVCTP message: transport header (1) 345 return 1; 346 } 347 } 348 349 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 350 switch (avctp_packet_type){ 351 case AVCTP_SINGLE_PACKET: 352 case AVCTP_START_PACKET: 353 break; 354 default: 355 return 0; 356 } 357 358 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 359 switch (command_opcode){ 360 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 361 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 362 break; 363 case AVRCP_CMD_OPCODE_PASS_THROUGH: 364 offset += 3; // AVRCP message: operation id (1), param_len (2) 365 break; 366 default: 367 break; 368 } 369 return offset; 370 } 371 372 static uint16_t avrcp_get_num_free_bytes_for_payload(uint16_t l2cap_cid, avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type){ 373 uint16_t max_frame_size = btstack_min(l2cap_get_remote_mtu_for_local_cid(l2cap_cid), AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 374 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 375 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 376 377 btstack_assert(max_frame_size >= payload_offset); 378 return (max_frame_size - payload_offset); 379 } 380 381 382 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 383 if (connection->data_offset == 0){ 384 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_signaling_cid, 385 connection->command_opcode, 386 AVCTP_SINGLE_PACKET); 387 if (*max_payload_size >= connection->data_len){ 388 return AVCTP_SINGLE_PACKET; 389 } else { 390 return AVCTP_START_PACKET; 391 } 392 } else { 393 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_signaling_cid, 394 connection->command_opcode, 395 AVCTP_CONTINUE_PACKET); 396 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 397 return AVCTP_CONTINUE_PACKET; 398 } else { 399 return AVCTP_END_PACKET; 400 } 401 } 402 } 403 404 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 405 switch (connection->avctp_packet_type) { 406 case AVCTP_SINGLE_PACKET: 407 case AVCTP_START_PACKET: 408 break; 409 default: 410 return connection->packet_type; 411 } 412 413 if (connection->data_offset == 0){ 414 if (AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE >= connection->data_len){ 415 return AVRCP_SINGLE_PACKET; 416 } else { 417 return AVRCP_START_PACKET; 418 } 419 } else { 420 if ((connection->data_len - connection->data_offset) > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 421 return AVRCP_CONTINUE_PACKET; 422 } else { 423 return AVRCP_END_PACKET; 424 } 425 } 426 } 427 428 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 429 btstack_linked_list_iterator_t it; 430 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 431 while (btstack_linked_list_iterator_has_next(&it)){ 432 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 433 if (connection->role != role) continue; 434 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 435 return connection; 436 } 437 return NULL; 438 } 439 440 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 441 btstack_linked_list_iterator_t it; 442 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 443 while (btstack_linked_list_iterator_has_next(&it)){ 444 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 445 if (connection->role != role) continue; 446 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 447 return connection; 448 } 449 return NULL; 450 } 451 452 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 453 btstack_linked_list_iterator_t it; 454 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 455 while (btstack_linked_list_iterator_has_next(&it)){ 456 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 457 if (connection->role != role) continue; 458 if (connection->avrcp_cid != avrcp_cid) continue; 459 return connection; 460 } 461 return NULL; 462 } 463 464 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 465 btstack_linked_list_iterator_t it; 466 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 467 while (btstack_linked_list_iterator_has_next(&it)){ 468 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 469 if (connection->role != role) continue; 470 if (connection->avrcp_browsing_cid != browsing_cid) continue; 471 return connection; 472 } 473 return NULL; 474 } 475 476 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 477 btstack_linked_list_iterator_t it; 478 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 479 while (btstack_linked_list_iterator_has_next(&it)){ 480 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 481 if (connection->role != role) continue; 482 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 483 return connection; 484 } 485 return NULL; 486 } 487 488 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 489 btstack_linked_list_iterator_t it; 490 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 491 while (btstack_linked_list_iterator_has_next(&it)){ 492 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 493 if (connection->role != role) continue; 494 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 495 return connection->browsing_connection; 496 } 497 return NULL; 498 } 499 500 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 501 connection->wait_to_send = true; 502 l2cap_request_can_send_now_event(l2cap_cid); 503 } 504 505 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 506 do { 507 if (avrcp_cid_counter == 0xffff) { 508 avrcp_cid_counter = 1; 509 } else { 510 avrcp_cid_counter++; 511 } 512 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 513 return avrcp_cid_counter; 514 } 515 516 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 517 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 518 if (!connection){ 519 log_error("Not enough memory to create connection for role %d", role); 520 return NULL; 521 } 522 523 connection->state = AVCTP_CONNECTION_IDLE; 524 connection->role = role; 525 526 connection->transaction_id = 0xFF; 527 connection->transaction_id_counter = 0; 528 529 connection->max_num_fragments = 0xFF; 530 531 // setup default unit / subunit info 532 connection->company_id = 0xffffff; 533 connection->unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 534 connection->subunit_info_data_size = sizeof(avrcp_default_subunit_info); 535 connection->subunit_info_data = avrcp_default_subunit_info; 536 537 log_info("avrcp_create_connection, role %d", role); 538 (void)memcpy(connection->remote_addr, remote_addr, 6); 539 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 540 return connection; 541 } 542 543 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 544 btstack_run_loop_remove_timer(&connection->retry_timer); 545 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 546 btstack_memory_avrcp_connection_free(connection); 547 } 548 549 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 550 btstack_assert(avrcp_callback != NULL); 551 552 uint8_t event[14]; 553 int pos = 0; 554 event[pos++] = HCI_EVENT_AVRCP_META; 555 event[pos++] = sizeof(event) - 2; 556 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 557 event[pos++] = status; 558 little_endian_store_16(event, pos, avrcp_cid); 559 pos += 2; 560 reverse_bd_addr(addr,&event[pos]); 561 pos += 6; 562 little_endian_store_16(event, pos, con_handle); 563 pos += 2; 564 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 565 } 566 567 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 568 btstack_assert(avrcp_callback != NULL); 569 570 uint8_t event[5]; 571 int pos = 0; 572 event[pos++] = HCI_EVENT_AVRCP_META; 573 event[pos++] = sizeof(event) - 2; 574 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 575 little_endian_store_16(event, pos, avrcp_cid); 576 pos += 2; 577 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 578 } 579 580 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 581 return avrcp_sdp_query_context.browsing_l2cap_psm; 582 } 583 584 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 585 des_iterator_t des_list_it; 586 des_iterator_t prot_it; 587 588 // Handle new SDP record 589 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 590 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 591 avrcp_sdp_query_context.parse_sdp_record = 0; 592 // log_info("SDP Record: Nr: %d", record_id); 593 } 594 595 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 596 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 597 598 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 599 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 600 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 601 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 602 for (des_iterator_init(&des_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 603 uint8_t * element = des_iterator_get_element(&des_list_it); 604 if (de_get_element_type(element) != DE_UUID) continue; 605 uint32_t uuid = de_get_uuid32(element); 606 switch (uuid){ 607 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 608 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 609 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 610 avrcp_sdp_query_context.parse_sdp_record = 1; 611 break; 612 default: 613 break; 614 } 615 } 616 break; 617 618 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 619 if (!avrcp_sdp_query_context.parse_sdp_record) break; 620 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 621 for (des_iterator_init(&des_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 622 uint8_t *des_element; 623 uint8_t *element; 624 uint32_t uuid; 625 626 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 627 628 des_element = des_iterator_get_element(&des_list_it); 629 des_iterator_init(&prot_it, des_element); 630 element = des_iterator_get_element(&prot_it); 631 632 if (de_get_element_type(element) != DE_UUID) continue; 633 634 uuid = de_get_uuid32(element); 635 des_iterator_next(&prot_it); 636 switch (uuid){ 637 case BLUETOOTH_PROTOCOL_L2CAP: 638 if (!des_iterator_has_more(&prot_it)) continue; 639 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 640 break; 641 case BLUETOOTH_PROTOCOL_AVCTP: 642 if (!des_iterator_has_more(&prot_it)) continue; 643 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 644 break; 645 default: 646 break; 647 } 648 } 649 } 650 break; 651 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 652 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 653 if (!avrcp_sdp_query_context.parse_sdp_record) break; 654 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 655 656 des_iterator_t des_list_0_it; 657 uint8_t *element_0; 658 659 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 660 element_0 = des_iterator_get_element(&des_list_0_it); 661 662 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 663 uint8_t *des_element; 664 uint8_t *element; 665 uint32_t uuid; 666 667 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 668 669 des_element = des_iterator_get_element(&des_list_it); 670 des_iterator_init(&prot_it, des_element); 671 element = des_iterator_get_element(&prot_it); 672 673 if (de_get_element_type(element) != DE_UUID) continue; 674 675 uuid = de_get_uuid32(element); 676 des_iterator_next(&prot_it); 677 switch (uuid){ 678 case BLUETOOTH_PROTOCOL_L2CAP: 679 if (!des_iterator_has_more(&prot_it)) continue; 680 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 681 break; 682 case BLUETOOTH_PROTOCOL_AVCTP: 683 if (!des_iterator_has_more(&prot_it)) continue; 684 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 685 break; 686 default: 687 break; 688 } 689 } 690 } 691 break; 692 default: 693 break; 694 } 695 } 696 } else { 697 log_error("SDP attribute value buffer size exceeded: available %d, required %d", avrcp_sdp_query_attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 698 } 699 } 700 701 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 702 if (connection == NULL) return; 703 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 704 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 705 avrcp_finalize_connection(connection); 706 } 707 708 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection){ 709 if (connection == NULL) return; 710 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 711 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 712 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 713 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 714 } 715 716 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 717 UNUSED(packet_type); 718 UNUSED(channel); 719 UNUSED(size); 720 721 bool state_ok = true; 722 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 723 if (!avrcp_target_connection || avrcp_target_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 724 state_ok = false; 725 } 726 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 727 if (!avrcp_controller_connection || avrcp_controller_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 728 state_ok = false; 729 } 730 if (!state_ok){ 731 // something wrong, nevertheless, start next sdp query if this one is complete 732 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 733 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 734 } 735 return; 736 } 737 738 uint8_t status; 739 740 switch (hci_event_packet_get_type(packet)){ 741 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 742 avrcp_handle_sdp_client_query_attribute_value(packet); 743 return; 744 745 case SDP_EVENT_QUERY_COMPLETE: 746 status = sdp_event_query_complete_get_status(packet); 747 748 if (status != ERROR_CODE_SUCCESS){ 749 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 750 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 751 break; 752 } 753 754 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 755 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 756 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 757 break; 758 } 759 760 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection); 761 avrcp_handle_sdp_query_succeeded(avrcp_target_connection); 762 763 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 764 break; 765 766 default: 767 return; 768 } 769 770 // register the SDP Query request to check if there is another connection waiting for the query 771 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 772 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 773 } 774 775 776 static avrcp_connection_t * avrcp_handle_incoming_connection_for_role(avrcp_role_t role, avrcp_connection_t * connection, bd_addr_t event_addr, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t avrcp_cid){ 777 if (connection == NULL){ 778 connection = avrcp_create_connection(role, event_addr); 779 } 780 if (connection) { 781 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 782 connection->l2cap_signaling_cid = local_cid; 783 connection->avrcp_cid = avrcp_cid; 784 connection->con_handle = con_handle; 785 btstack_run_loop_remove_timer(&connection->retry_timer); 786 } 787 return connection; 788 } 789 790 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 791 connection->l2cap_signaling_cid = local_cid; 792 connection->l2cap_mtu = l2cap_mtu; 793 connection->con_handle = con_handle; 794 connection->incoming_declined = false; 795 connection->song_length_ms = 0xFFFFFFFF; 796 connection->song_position_ms = 0xFFFFFFFF; 797 connection->playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 798 connection->state = AVCTP_CONNECTION_OPENED; 799 800 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d, state %d", connection->avrcp_cid, connection->l2cap_signaling_cid, connection->role, connection->state); 801 } 802 803 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 804 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 805 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 806 if (connection_controller == NULL) return; 807 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 808 if (connection_target == NULL) return; 809 810 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 811 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 812 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 813 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 814 } 815 } 816 817 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 818 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 819 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 820 821 // add some jitter/randomness to reconnect delay 822 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 823 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 824 825 btstack_run_loop_add_timer(&connection->retry_timer); 826 } 827 828 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 829 return (avrcp_frame_type_t)((header & 0x02) >> 1); 830 } 831 832 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 833 UNUSED(channel); 834 UNUSED(size); 835 bd_addr_t event_addr; 836 uint16_t local_cid; 837 uint16_t l2cap_mtu; 838 uint8_t status; 839 bool decline_connection; 840 bool outoing_active; 841 hci_con_handle_t con_handle; 842 843 avrcp_connection_t * connection_controller; 844 avrcp_connection_t * connection_target; 845 bool can_send; 846 847 switch (packet_type) { 848 case HCI_EVENT_PACKET: 849 switch (hci_event_packet_get_type(packet)) { 850 851 case L2CAP_EVENT_INCOMING_CONNECTION: 852 btstack_assert(avrcp_controller_packet_handler != NULL); 853 btstack_assert(avrcp_target_packet_handler != NULL); 854 855 l2cap_event_incoming_connection_get_address(packet, event_addr); 856 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 857 con_handle = l2cap_event_incoming_connection_get_handle(packet); 858 859 outoing_active = false; 860 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 861 if (connection_target != NULL){ 862 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 863 outoing_active = true; 864 connection_target->incoming_declined = true; 865 } 866 } 867 868 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 869 if (connection_controller != NULL){ 870 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 871 outoing_active = true; 872 connection_controller->incoming_declined = true; 873 } 874 } 875 876 decline_connection = outoing_active; 877 if (decline_connection == false){ 878 uint16_t avrcp_cid; 879 if ((connection_controller == NULL) || (connection_target == NULL)){ 880 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 881 } else { 882 avrcp_cid = connection_controller->avrcp_cid; 883 } 884 // create two connection objects (both) 885 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 886 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 887 if ((connection_target == NULL) || (connection_controller == NULL)){ 888 decline_connection = true; 889 if (connection_target) { 890 avrcp_finalize_connection(connection_target); 891 } 892 if (connection_controller) { 893 avrcp_finalize_connection(connection_controller); 894 } 895 } 896 } 897 if (decline_connection){ 898 l2cap_decline_connection(local_cid); 899 } else { 900 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 901 l2cap_accept_connection(local_cid); 902 } 903 break; 904 905 case L2CAP_EVENT_CHANNEL_OPENED: 906 l2cap_event_channel_opened_get_address(packet, event_addr); 907 status = l2cap_event_channel_opened_get_status(packet); 908 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 909 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 910 con_handle = l2cap_event_channel_opened_get_handle(packet); 911 912 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 913 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 914 915 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 916 // outgoing: structs are cteated in avrcp_connect() 917 if ((connection_controller == NULL) || (connection_target == NULL)) { 918 break; 919 } 920 921 switch (status){ 922 case ERROR_CODE_SUCCESS: 923 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 924 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 925 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 926 return; 927 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 928 if (connection_controller->incoming_declined == true){ 929 log_info("Incoming connection was declined, and the outgoing failed"); 930 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 931 connection_controller->incoming_declined = false; 932 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 933 connection_target->incoming_declined = false; 934 avrcp_retry_timer_start(connection_controller); 935 return; 936 } 937 break; 938 default: 939 break; 940 } 941 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 942 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 943 avrcp_finalize_connection(connection_controller); 944 avrcp_finalize_connection(connection_target); 945 946 break; 947 948 case L2CAP_EVENT_CHANNEL_CLOSED: 949 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 950 951 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 952 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 953 if ((connection_controller == NULL) || (connection_target == NULL)) { 954 break; 955 } 956 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 957 avrcp_finalize_connection(connection_controller); 958 avrcp_finalize_connection(connection_target); 959 break; 960 961 case L2CAP_EVENT_CAN_SEND_NOW: 962 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 963 can_send = true; 964 965 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 966 if ((connection_target != NULL) && connection_target->wait_to_send){ 967 connection_target->wait_to_send = false; 968 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 969 can_send = false; 970 } 971 972 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 973 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 974 if (can_send){ 975 connection_controller->wait_to_send = false; 976 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 977 } else { 978 l2cap_request_can_send_now_event(local_cid); 979 } 980 } 981 break; 982 983 default: 984 break; 985 } 986 break; 987 988 case L2CAP_DATA_PACKET: 989 switch (avrcp_get_frame_type(packet[0])){ 990 case AVRCP_RESPONSE_FRAME: 991 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 992 break; 993 case AVRCP_COMMAND_FRAME: 994 default: // make compiler happy 995 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 996 break; 997 } 998 break; 999 1000 default: 1001 break; 1002 } 1003 } 1004 1005 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1006 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1007 if (!connection_controller){ 1008 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1009 } 1010 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1011 if (!connection_target){ 1012 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1013 } 1014 if (connection_controller->browsing_connection){ 1015 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1016 } 1017 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1018 return ERROR_CODE_SUCCESS; 1019 } 1020 1021 static void avrcp_handle_start_sdp_client_query(void * context){ 1022 UNUSED(context); 1023 1024 btstack_linked_list_iterator_t it; 1025 btstack_linked_list_iterator_init(&it, &avrcp_connections); 1026 while (btstack_linked_list_iterator_has_next(&it)){ 1027 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 1028 1029 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 1030 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1031 1032 // prevent triggering SDP query twice (for each role once) 1033 avrcp_connection_t * connection_with_opposite_role; 1034 switch (connection->role){ 1035 case AVRCP_CONTROLLER: 1036 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 1037 break; 1038 case AVRCP_TARGET: 1039 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 1040 break; 1041 default: 1042 btstack_assert(false); 1043 return; 1044 } 1045 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1046 1047 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 1048 avrcp_sdp_query_context.avrcp_version = 0; 1049 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 1050 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 1051 return; 1052 } 1053 } 1054 1055 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1056 btstack_assert(avrcp_controller_packet_handler != NULL); 1057 btstack_assert(avrcp_target_packet_handler != NULL); 1058 1059 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1060 if (connection_controller){ 1061 return ERROR_CODE_COMMAND_DISALLOWED; 1062 } 1063 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1064 if (connection_target){ 1065 return ERROR_CODE_COMMAND_DISALLOWED; 1066 } 1067 1068 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1069 1070 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1071 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1072 1073 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1074 if (!connection_target){ 1075 avrcp_finalize_connection(connection_controller); 1076 return BTSTACK_MEMORY_ALLOC_FAILED; 1077 } 1078 1079 if (avrcp_cid != NULL){ 1080 *avrcp_cid = cid; 1081 } 1082 1083 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1084 connection_controller->avrcp_cid = cid; 1085 1086 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1087 connection_target->avrcp_cid = cid; 1088 1089 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1090 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1091 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1092 return ERROR_CODE_SUCCESS; 1093 } 1094 1095 void avrcp_init(void){ 1096 avrcp_connections = NULL; 1097 if (avrcp_l2cap_service_registered) return; 1098 1099 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1100 if (status != ERROR_CODE_SUCCESS) return; 1101 avrcp_l2cap_service_registered = true; 1102 } 1103 1104 void avrcp_deinit(void){ 1105 avrcp_l2cap_service_registered = false; 1106 1107 avrcp_cid_counter = 0; 1108 avrcp_connections = NULL; 1109 1110 avrcp_callback = NULL; 1111 avrcp_controller_packet_handler = NULL; 1112 avrcp_target_packet_handler = NULL; 1113 1114 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1115 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1116 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1117 } 1118 1119 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1120 avrcp_controller_packet_handler = callback; 1121 } 1122 1123 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1124 avrcp_target_packet_handler = callback; 1125 } 1126 1127 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1128 btstack_assert(callback != NULL); 1129 avrcp_callback = callback; 1130 } 1131 1132 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1133 #define FUZZ_CID 0x44 1134 #define FUZZ_CON_HANDLE 0x0001 1135 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1136 void avrcp_init_fuzz(void){ 1137 // setup avrcp connections for cid 1138 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1139 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1140 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1141 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1142 } 1143 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1144 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1145 } 1146 #endif