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_mtu, avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type){ 373 uint16_t max_frame_size = btstack_min(l2cap_mtu, 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->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 384 return AVCTP_SINGLE_PACKET; 385 } 386 387 if (connection->data_offset == 0){ 388 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 389 connection->command_opcode, 390 AVCTP_SINGLE_PACKET); 391 if (max_payload_size_for_single_packet >= connection->data_len){ 392 *max_payload_size = max_payload_size_for_single_packet; 393 return AVCTP_SINGLE_PACKET; 394 } else { 395 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 396 *max_payload_size = max_payload_size_for_start_packet; 397 return AVCTP_START_PACKET; 398 } 399 } else { 400 // both packet types have the same single byte AVCTP header 401 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 402 connection->command_opcode, 403 AVCTP_CONTINUE_PACKET); 404 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 405 return AVCTP_CONTINUE_PACKET; 406 } else { 407 return AVCTP_END_PACKET; 408 } 409 } 410 } 411 412 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 413 switch (connection->avctp_packet_type) { 414 case AVCTP_SINGLE_PACKET: 415 case AVCTP_START_PACKET: 416 break; 417 default: 418 return connection->avrcp_packet_type; 419 } 420 421 if (connection->data_offset == 0){ 422 if (AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE >= connection->data_len){ 423 return AVRCP_SINGLE_PACKET; 424 } else { 425 return AVRCP_START_PACKET; 426 } 427 } else { 428 if ((connection->data_len - connection->data_offset) > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 429 return AVRCP_CONTINUE_PACKET; 430 } else { 431 return AVRCP_END_PACKET; 432 } 433 } 434 } 435 436 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 437 btstack_linked_list_iterator_t it; 438 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 439 while (btstack_linked_list_iterator_has_next(&it)){ 440 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 441 if (connection->role != role) continue; 442 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 443 return connection; 444 } 445 return NULL; 446 } 447 448 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 449 btstack_linked_list_iterator_t it; 450 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 451 while (btstack_linked_list_iterator_has_next(&it)){ 452 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 453 if (connection->role != role) continue; 454 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 455 return connection; 456 } 457 return NULL; 458 } 459 460 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 461 btstack_linked_list_iterator_t it; 462 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 463 while (btstack_linked_list_iterator_has_next(&it)){ 464 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 465 if (connection->role != role) continue; 466 if (connection->avrcp_cid != avrcp_cid) continue; 467 return connection; 468 } 469 return NULL; 470 } 471 472 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 473 btstack_linked_list_iterator_t it; 474 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 475 while (btstack_linked_list_iterator_has_next(&it)){ 476 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 477 if (connection->role != role) continue; 478 if (connection->avrcp_browsing_cid != browsing_cid) continue; 479 return connection; 480 } 481 return NULL; 482 } 483 484 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 485 btstack_linked_list_iterator_t it; 486 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 487 while (btstack_linked_list_iterator_has_next(&it)){ 488 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 489 if (connection->role != role) continue; 490 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 491 return connection; 492 } 493 return NULL; 494 } 495 496 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 497 btstack_linked_list_iterator_t it; 498 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 499 while (btstack_linked_list_iterator_has_next(&it)){ 500 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 501 if (connection->role != role) continue; 502 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 503 return connection->browsing_connection; 504 } 505 return NULL; 506 } 507 508 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 509 connection->wait_to_send = true; 510 l2cap_request_can_send_now_event(l2cap_cid); 511 } 512 513 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 514 do { 515 if (avrcp_cid_counter == 0xffff) { 516 avrcp_cid_counter = 1; 517 } else { 518 avrcp_cid_counter++; 519 } 520 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 521 return avrcp_cid_counter; 522 } 523 524 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 525 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 526 if (!connection){ 527 log_error("Not enough memory to create connection for role %d", role); 528 return NULL; 529 } 530 531 connection->state = AVCTP_CONNECTION_IDLE; 532 connection->role = role; 533 534 connection->transaction_id = 0xFF; 535 connection->transaction_id_counter = 0; 536 537 connection->controller_max_num_fragments = 0xFF; 538 539 // setup default unit / subunit info 540 connection->company_id = 0xffffff; 541 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 542 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 543 connection->target_subunit_info_data = avrcp_default_subunit_info; 544 545 log_info("avrcp_create_connection, role %d", role); 546 (void)memcpy(connection->remote_addr, remote_addr, 6); 547 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 548 return connection; 549 } 550 551 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 552 btstack_run_loop_remove_timer(&connection->retry_timer); 553 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 554 btstack_memory_avrcp_connection_free(connection); 555 } 556 557 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 558 btstack_assert(avrcp_callback != NULL); 559 560 uint8_t event[14]; 561 int pos = 0; 562 event[pos++] = HCI_EVENT_AVRCP_META; 563 event[pos++] = sizeof(event) - 2; 564 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 565 event[pos++] = status; 566 little_endian_store_16(event, pos, avrcp_cid); 567 pos += 2; 568 reverse_bd_addr(addr,&event[pos]); 569 pos += 6; 570 little_endian_store_16(event, pos, con_handle); 571 pos += 2; 572 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 573 } 574 575 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 576 btstack_assert(avrcp_callback != NULL); 577 578 uint8_t event[5]; 579 int pos = 0; 580 event[pos++] = HCI_EVENT_AVRCP_META; 581 event[pos++] = sizeof(event) - 2; 582 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 583 little_endian_store_16(event, pos, avrcp_cid); 584 pos += 2; 585 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 586 } 587 588 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 589 return avrcp_sdp_query_context.browsing_l2cap_psm; 590 } 591 592 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 593 des_iterator_t des_list_it; 594 des_iterator_t prot_it; 595 596 // Handle new SDP record 597 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 598 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 599 avrcp_sdp_query_context.parse_sdp_record = 0; 600 // log_info("SDP Record: Nr: %d", record_id); 601 } 602 603 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 604 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 605 606 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 607 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 608 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 609 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 610 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)) { 611 uint8_t * element = des_iterator_get_element(&des_list_it); 612 if (de_get_element_type(element) != DE_UUID) continue; 613 uint32_t uuid = de_get_uuid32(element); 614 switch (uuid){ 615 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 616 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 617 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 618 avrcp_sdp_query_context.parse_sdp_record = 1; 619 break; 620 default: 621 break; 622 } 623 } 624 break; 625 626 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 627 if (!avrcp_sdp_query_context.parse_sdp_record) break; 628 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 629 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)) { 630 uint8_t *des_element; 631 uint8_t *element; 632 uint32_t uuid; 633 634 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 635 636 des_element = des_iterator_get_element(&des_list_it); 637 des_iterator_init(&prot_it, des_element); 638 element = des_iterator_get_element(&prot_it); 639 640 if (de_get_element_type(element) != DE_UUID) continue; 641 642 uuid = de_get_uuid32(element); 643 des_iterator_next(&prot_it); 644 switch (uuid){ 645 case BLUETOOTH_PROTOCOL_L2CAP: 646 if (!des_iterator_has_more(&prot_it)) continue; 647 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 648 break; 649 case BLUETOOTH_PROTOCOL_AVCTP: 650 if (!des_iterator_has_more(&prot_it)) continue; 651 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 652 break; 653 default: 654 break; 655 } 656 } 657 } 658 break; 659 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 660 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 661 if (!avrcp_sdp_query_context.parse_sdp_record) break; 662 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 663 664 des_iterator_t des_list_0_it; 665 uint8_t *element_0; 666 667 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 668 element_0 = des_iterator_get_element(&des_list_0_it); 669 670 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 671 uint8_t *des_element; 672 uint8_t *element; 673 uint32_t uuid; 674 675 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 676 677 des_element = des_iterator_get_element(&des_list_it); 678 des_iterator_init(&prot_it, des_element); 679 element = des_iterator_get_element(&prot_it); 680 681 if (de_get_element_type(element) != DE_UUID) continue; 682 683 uuid = de_get_uuid32(element); 684 des_iterator_next(&prot_it); 685 switch (uuid){ 686 case BLUETOOTH_PROTOCOL_L2CAP: 687 if (!des_iterator_has_more(&prot_it)) continue; 688 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 689 break; 690 case BLUETOOTH_PROTOCOL_AVCTP: 691 if (!des_iterator_has_more(&prot_it)) continue; 692 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 693 break; 694 default: 695 break; 696 } 697 } 698 } 699 break; 700 default: 701 break; 702 } 703 } 704 } else { 705 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)); 706 } 707 } 708 709 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 710 if (connection == NULL) return; 711 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 712 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 713 avrcp_finalize_connection(connection); 714 } 715 716 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection){ 717 if (connection == NULL) return; 718 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 719 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 720 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 721 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 722 } 723 724 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 725 UNUSED(packet_type); 726 UNUSED(channel); 727 UNUSED(size); 728 729 bool state_ok = true; 730 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 731 if (!avrcp_target_connection || avrcp_target_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 732 state_ok = false; 733 } 734 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 735 if (!avrcp_controller_connection || avrcp_controller_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 736 state_ok = false; 737 } 738 if (!state_ok){ 739 // something wrong, nevertheless, start next sdp query if this one is complete 740 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 741 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 742 } 743 return; 744 } 745 746 uint8_t status; 747 748 switch (hci_event_packet_get_type(packet)){ 749 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 750 avrcp_handle_sdp_client_query_attribute_value(packet); 751 return; 752 753 case SDP_EVENT_QUERY_COMPLETE: 754 status = sdp_event_query_complete_get_status(packet); 755 756 if (status != ERROR_CODE_SUCCESS){ 757 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 758 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 759 break; 760 } 761 762 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 763 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 764 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 765 break; 766 } 767 768 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection); 769 avrcp_handle_sdp_query_succeeded(avrcp_target_connection); 770 771 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 772 break; 773 774 default: 775 return; 776 } 777 778 // register the SDP Query request to check if there is another connection waiting for the query 779 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 780 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 781 } 782 783 784 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){ 785 if (connection == NULL){ 786 connection = avrcp_create_connection(role, event_addr); 787 } 788 if (connection) { 789 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 790 connection->l2cap_signaling_cid = local_cid; 791 connection->avrcp_cid = avrcp_cid; 792 connection->con_handle = con_handle; 793 btstack_run_loop_remove_timer(&connection->retry_timer); 794 } 795 return connection; 796 } 797 798 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 799 connection->l2cap_signaling_cid = local_cid; 800 connection->l2cap_mtu = l2cap_mtu; 801 connection->con_handle = con_handle; 802 connection->incoming_declined = false; 803 connection->target_song_length_ms = 0xFFFFFFFF; 804 connection->target_song_position_ms = 0xFFFFFFFF; 805 memset(connection->target_track_id, 0xFF, 8); 806 connection->target_track_selected = false; 807 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 808 connection->state = AVCTP_CONNECTION_OPENED; 809 810 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); 811 } 812 813 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 814 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 815 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 816 if (connection_controller == NULL) return; 817 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 818 if (connection_target == NULL) return; 819 820 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 821 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 822 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 823 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 824 } 825 } 826 827 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 828 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 829 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 830 831 // add some jitter/randomness to reconnect delay 832 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 833 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 834 835 btstack_run_loop_add_timer(&connection->retry_timer); 836 } 837 838 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 839 return (avrcp_frame_type_t)((header & 0x02) >> 1); 840 } 841 842 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 843 UNUSED(channel); 844 UNUSED(size); 845 bd_addr_t event_addr; 846 uint16_t local_cid; 847 uint16_t l2cap_mtu; 848 uint8_t status; 849 bool decline_connection; 850 bool outoing_active; 851 hci_con_handle_t con_handle; 852 853 avrcp_connection_t * connection_controller; 854 avrcp_connection_t * connection_target; 855 bool can_send; 856 857 switch (packet_type) { 858 case HCI_EVENT_PACKET: 859 switch (hci_event_packet_get_type(packet)) { 860 861 case L2CAP_EVENT_INCOMING_CONNECTION: 862 btstack_assert(avrcp_controller_packet_handler != NULL); 863 btstack_assert(avrcp_target_packet_handler != NULL); 864 865 l2cap_event_incoming_connection_get_address(packet, event_addr); 866 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 867 con_handle = l2cap_event_incoming_connection_get_handle(packet); 868 869 outoing_active = false; 870 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 871 if (connection_target != NULL){ 872 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 873 outoing_active = true; 874 connection_target->incoming_declined = true; 875 } 876 } 877 878 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 879 if (connection_controller != NULL){ 880 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 881 outoing_active = true; 882 connection_controller->incoming_declined = true; 883 } 884 } 885 886 decline_connection = outoing_active; 887 if (decline_connection == false){ 888 uint16_t avrcp_cid; 889 if ((connection_controller == NULL) || (connection_target == NULL)){ 890 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 891 } else { 892 avrcp_cid = connection_controller->avrcp_cid; 893 } 894 // create two connection objects (both) 895 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 896 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 897 if ((connection_target == NULL) || (connection_controller == NULL)){ 898 decline_connection = true; 899 if (connection_target) { 900 avrcp_finalize_connection(connection_target); 901 } 902 if (connection_controller) { 903 avrcp_finalize_connection(connection_controller); 904 } 905 } 906 } 907 if (decline_connection){ 908 l2cap_decline_connection(local_cid); 909 } else { 910 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 911 l2cap_accept_connection(local_cid); 912 } 913 break; 914 915 case L2CAP_EVENT_CHANNEL_OPENED: 916 l2cap_event_channel_opened_get_address(packet, event_addr); 917 status = l2cap_event_channel_opened_get_status(packet); 918 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 919 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 920 con_handle = l2cap_event_channel_opened_get_handle(packet); 921 922 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 923 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 924 925 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 926 // outgoing: structs are cteated in avrcp_connect() 927 if ((connection_controller == NULL) || (connection_target == NULL)) { 928 break; 929 } 930 931 switch (status){ 932 case ERROR_CODE_SUCCESS: 933 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 934 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 935 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 936 return; 937 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 938 if (connection_controller->incoming_declined == true){ 939 log_info("Incoming connection was declined, and the outgoing failed"); 940 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 941 connection_controller->incoming_declined = false; 942 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 943 connection_target->incoming_declined = false; 944 avrcp_retry_timer_start(connection_controller); 945 return; 946 } 947 break; 948 default: 949 break; 950 } 951 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 952 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 953 avrcp_finalize_connection(connection_controller); 954 avrcp_finalize_connection(connection_target); 955 956 break; 957 958 case L2CAP_EVENT_CHANNEL_CLOSED: 959 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 960 961 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 962 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 963 if ((connection_controller == NULL) || (connection_target == NULL)) { 964 break; 965 } 966 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 967 avrcp_finalize_connection(connection_controller); 968 avrcp_finalize_connection(connection_target); 969 break; 970 971 case L2CAP_EVENT_CAN_SEND_NOW: 972 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 973 can_send = true; 974 975 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 976 if ((connection_target != NULL) && connection_target->wait_to_send){ 977 connection_target->wait_to_send = false; 978 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 979 can_send = false; 980 } 981 982 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 983 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 984 if (can_send){ 985 connection_controller->wait_to_send = false; 986 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 987 } else { 988 l2cap_request_can_send_now_event(local_cid); 989 } 990 } 991 break; 992 993 default: 994 break; 995 } 996 break; 997 998 case L2CAP_DATA_PACKET: 999 switch (avrcp_get_frame_type(packet[0])){ 1000 case AVRCP_RESPONSE_FRAME: 1001 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1002 break; 1003 case AVRCP_COMMAND_FRAME: 1004 default: // make compiler happy 1005 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1006 break; 1007 } 1008 break; 1009 1010 default: 1011 break; 1012 } 1013 } 1014 1015 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1016 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1017 if (!connection_controller){ 1018 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1019 } 1020 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1021 if (!connection_target){ 1022 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1023 } 1024 if (connection_controller->browsing_connection){ 1025 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1026 } 1027 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1028 return ERROR_CODE_SUCCESS; 1029 } 1030 1031 static void avrcp_handle_start_sdp_client_query(void * context){ 1032 UNUSED(context); 1033 1034 btstack_linked_list_iterator_t it; 1035 btstack_linked_list_iterator_init(&it, &avrcp_connections); 1036 while (btstack_linked_list_iterator_has_next(&it)){ 1037 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 1038 1039 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 1040 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1041 1042 // prevent triggering SDP query twice (for each role once) 1043 avrcp_connection_t * connection_with_opposite_role; 1044 switch (connection->role){ 1045 case AVRCP_CONTROLLER: 1046 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 1047 break; 1048 case AVRCP_TARGET: 1049 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 1050 break; 1051 default: 1052 btstack_assert(false); 1053 return; 1054 } 1055 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1056 1057 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 1058 avrcp_sdp_query_context.avrcp_version = 0; 1059 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 1060 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 1061 return; 1062 } 1063 } 1064 1065 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1066 btstack_assert(avrcp_controller_packet_handler != NULL); 1067 btstack_assert(avrcp_target_packet_handler != NULL); 1068 1069 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1070 if (connection_controller){ 1071 return ERROR_CODE_COMMAND_DISALLOWED; 1072 } 1073 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1074 if (connection_target){ 1075 return ERROR_CODE_COMMAND_DISALLOWED; 1076 } 1077 1078 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1079 1080 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1081 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1082 1083 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1084 if (!connection_target){ 1085 avrcp_finalize_connection(connection_controller); 1086 return BTSTACK_MEMORY_ALLOC_FAILED; 1087 } 1088 1089 if (avrcp_cid != NULL){ 1090 *avrcp_cid = cid; 1091 } 1092 1093 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1094 connection_controller->avrcp_cid = cid; 1095 1096 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1097 connection_target->avrcp_cid = cid; 1098 1099 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1100 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1101 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1102 return ERROR_CODE_SUCCESS; 1103 } 1104 1105 void avrcp_init(void){ 1106 avrcp_connections = NULL; 1107 if (avrcp_l2cap_service_registered) return; 1108 1109 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1110 if (status != ERROR_CODE_SUCCESS) return; 1111 avrcp_l2cap_service_registered = true; 1112 } 1113 1114 void avrcp_deinit(void){ 1115 avrcp_l2cap_service_registered = false; 1116 1117 avrcp_cid_counter = 0; 1118 avrcp_connections = NULL; 1119 1120 avrcp_callback = NULL; 1121 avrcp_controller_packet_handler = NULL; 1122 avrcp_target_packet_handler = NULL; 1123 1124 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1125 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1126 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1127 } 1128 1129 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1130 avrcp_controller_packet_handler = callback; 1131 } 1132 1133 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1134 avrcp_target_packet_handler = callback; 1135 } 1136 1137 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1138 btstack_assert(callback != NULL); 1139 avrcp_callback = callback; 1140 } 1141 1142 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1143 #define FUZZ_CID 0x44 1144 #define FUZZ_CON_HANDLE 0x0001 1145 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1146 void avrcp_init_fuzz(void){ 1147 // setup avrcp connections for cid 1148 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1149 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1150 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1151 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1152 } 1153 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1154 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1155 } 1156 #endif