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 43 #include "bluetooth_psm.h" 44 #include "bluetooth_sdp.h" 45 #include "btstack_debug.h" 46 #include "btstack_event.h" 47 #include "btstack_memory.h" 48 #include "classic/avrcp.h" 49 #include "classic/sdp_client.h" 50 #include "classic/sdp_util.h" 51 52 53 typedef struct { 54 uint8_t parse_sdp_record; 55 uint32_t record_id; 56 uint16_t avrcp_cid; 57 uint16_t avrcp_l2cap_psm; 58 uint16_t avrcp_version; 59 60 uint16_t browsing_l2cap_psm; 61 uint16_t browsing_version; 62 uint16_t cover_art_l2cap_psm; 63 } avrcp_sdp_query_context_t; 64 65 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 66 static void avrcp_start_next_sdp_query(void); 67 68 static const char * avrcp_subunit_type_name[] = { 69 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 70 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 71 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 72 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 73 }; 74 75 // default subunit info: single PANEL subunit 76 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 77 78 // globals 79 static bool avrcp_l2cap_service_registered = false; 80 81 // connections 82 static uint16_t avrcp_cid_counter; 83 static btstack_linked_list_t avrcp_connections; 84 85 // higher layer callbacks 86 static btstack_packet_handler_t avrcp_callback; 87 static btstack_packet_handler_t avrcp_controller_packet_handler; 88 static btstack_packet_handler_t avrcp_target_packet_handler; 89 90 // sdp query 91 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 92 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 93 static uint8_t avrcp_sdp_query_attribute_value[45]; 94 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 95 96 static void (*avrcp_browsing_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 97 #ifdef ENABLE_AVRCP_COVER_ART 98 static void (*avrcp_cover_art_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 99 #endif 100 101 const char * avrcp_subunit2str(uint16_t index){ 102 if (index <= 11) return avrcp_subunit_type_name[index]; 103 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 104 return avrcp_subunit_type_name[16]; 105 } 106 107 static const char * avrcp_event_name[] = { 108 "ERROR", "PLAYBACK_STATUS_CHANGED", 109 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 110 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 111 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 112 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 113 }; 114 const char * avrcp_event2str(uint16_t index){ 115 if (index <= 0x0d) return avrcp_event_name[index]; 116 return avrcp_event_name[0]; 117 } 118 119 static const char * avrcp_operation_name[] = { 120 "SKIP", NULL, NULL, NULL, NULL, 121 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 122 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 123 }; 124 125 const char * avrcp_operation2str(uint8_t operation_id){ 126 char * name = NULL; 127 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 128 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 129 } 130 if (name == NULL){ 131 static char buffer[13]; 132 btstack_snprintf_assert_complete(buffer, sizeof(buffer), "ID 0x%02x", operation_id); 133 buffer[sizeof(buffer)-1] = 0; 134 return buffer; 135 } else { 136 return name; 137 } 138 } 139 140 static const char * avrcp_media_attribute_id_name[] = { 141 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 142 }; 143 const char * avrcp_attribute2str(uint8_t index){ 144 if (index > 7){ 145 index = 0; 146 } 147 return avrcp_media_attribute_id_name[0]; 148 } 149 150 static const char * avrcp_play_status_name[] = { 151 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 152 "ERROR" // 0xFF 153 }; 154 const char * avrcp_play_status2str(uint8_t index){ 155 if (index > 4){ 156 index = 5; 157 } 158 return avrcp_play_status_name[index]; 159 } 160 161 static const char * avrcp_ctype_name[] = { 162 "CONTROL", 163 "STATUS", 164 "SPECIFIC_INQUIRY", 165 "NOTIFY", 166 "GENERAL_INQUIRY", 167 "RESERVED5", 168 "RESERVED6", 169 "RESERVED7", 170 "NOT IMPLEMENTED IN REMOTE", 171 "ACCEPTED BY REMOTE", 172 "REJECTED BY REMOTE", 173 "IN_TRANSITION", 174 "IMPLEMENTED_STABLE", 175 "CHANGED_STABLE", 176 "RESERVED", 177 "INTERIM" 178 }; 179 static const uint16_t avrcp_ctype_name_num = 16; 180 181 const char * avrcp_ctype2str(uint8_t index){ 182 if (index < avrcp_ctype_name_num){ 183 return avrcp_ctype_name[index]; 184 } 185 return "NONE"; 186 } 187 188 static const char * avrcp_shuffle_mode_name[] = { 189 "SHUFFLE OFF", 190 "SHUFFLE ALL TRACKS", 191 "SHUFFLE GROUP" 192 }; 193 194 const char * avrcp_shuffle2str(uint8_t index){ 195 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 196 return "NONE"; 197 } 198 199 static const char * avrcp_repeat_mode_name[] = { 200 "REPEAT OFF", 201 "REPEAT SINGLE TRACK", 202 "REPEAT ALL TRACKS", 203 "REPEAT GROUP" 204 }; 205 206 const char * avrcp_repeat2str(uint8_t index){ 207 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 208 return "NONE"; 209 } 210 211 static const char * notification_name[] = { 212 "INVALID_INDEX", 213 "PLAYBACK_STATUS_CHANGED", 214 "TRACK_CHANGED", 215 "TRACK_REACHED_END", 216 "TRACK_REACHED_START", 217 "PLAYBACK_POS_CHANGED", 218 "BATT_STATUS_CHANGED", 219 "SYSTEM_STATUS_CHANGED", 220 "PLAYER_APPLICATION_SETTING_CHANGED", 221 "NOW_PLAYING_CONTENT_CHANGED", 222 "AVAILABLE_PLAYERS_CHANGED", 223 "ADDRESSED_PLAYER_CHANGED", 224 "UIDS_CHANGED", 225 "VOLUME_CHANGED", 226 "MAX_VALUE" 227 }; 228 229 const char * avrcp_notification2str(avrcp_notification_event_id_t index){ 230 if ((index >= AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) && (index <= AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 231 return notification_name[index]; 232 } 233 return notification_name[0]; 234 } 235 236 btstack_linked_list_t avrcp_get_connections(void){ 237 return avrcp_connections; 238 } 239 240 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 241 uint8_t cmd_opcode_index = 5; 242 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 243 return packet[cmd_opcode_index]; 244 } 245 246 void avrcp_create_sdp_record(bool controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 247 const char * service_name, const char * service_provider_name){ 248 uint8_t* attribute; 249 de_create_sequence(service); 250 251 // 0x0000 "Service Record Handle" 252 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 253 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 254 255 // 0x0001 "Service Class ID List" 256 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 257 attribute = de_push_sequence(service); 258 { 259 if (controller){ 260 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 261 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 262 } else { 263 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 264 } 265 } 266 de_pop_sequence(service, attribute); 267 268 // 0x0004 "Protocol Descriptor List" 269 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 270 attribute = de_push_sequence(service); 271 { 272 uint8_t* l2cpProtocol = de_push_sequence(attribute); 273 { 274 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 275 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 276 } 277 de_pop_sequence(attribute, l2cpProtocol); 278 279 uint8_t* avctpProtocol = de_push_sequence(attribute); 280 { 281 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 282 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 283 } 284 de_pop_sequence(attribute, avctpProtocol); 285 } 286 de_pop_sequence(service, attribute); 287 288 // 0x0005 "Public Browse Group" 289 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 290 attribute = de_push_sequence(service); 291 { 292 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 293 } 294 de_pop_sequence(service, attribute); 295 296 // 0x0009 "Bluetooth Profile Descriptor List" 297 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 298 attribute = de_push_sequence(service); 299 { 300 uint8_t *avrcProfile = de_push_sequence(attribute); 301 { 302 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 303 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 304 } 305 de_pop_sequence(attribute, avrcProfile); 306 } 307 de_pop_sequence(service, attribute); 308 309 // 0x000d "Additional Bluetooth Profile Descriptor List" 310 if (browsing){ 311 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 312 attribute = de_push_sequence(service); 313 { 314 uint8_t * des = de_push_sequence(attribute); 315 { 316 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 317 { 318 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 319 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 320 } 321 de_pop_sequence(des, browsing_l2cpProtocol); 322 323 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 324 { 325 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 326 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 327 } 328 de_pop_sequence(des, browsing_avctpProtocol); 329 } 330 de_pop_sequence(attribute, des); 331 } 332 de_pop_sequence(service, attribute); 333 } 334 335 336 // 0x0100 "Service Name" 337 if (strlen(service_name) > 0){ 338 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 339 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 340 } 341 342 // 0x0100 "Provider Name" 343 if (strlen(service_provider_name) > 0){ 344 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 345 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 346 } 347 348 // 0x0311 "Supported Features" 349 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SUPPORTED_FEATURES); 350 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 351 } 352 353 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 354 switch (avctp_packet_type){ 355 case AVCTP_SINGLE_PACKET: 356 // AVCTP message: transport header (1), pid (2) 357 return 3; 358 case AVCTP_START_PACKET: 359 // AVCTP message: transport header (1), num_packets (1), pid (2) 360 return 4; 361 default: 362 // AVCTP message: transport header (1) 363 return 1; 364 } 365 } 366 367 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 368 switch (avctp_packet_type){ 369 case AVCTP_SINGLE_PACKET: 370 case AVCTP_START_PACKET: 371 break; 372 default: 373 return 0; 374 } 375 376 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 377 switch (command_opcode){ 378 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 379 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 380 break; 381 case AVRCP_CMD_OPCODE_PASS_THROUGH: 382 offset += 3; // AVRCP message: operation id (1), param_len (2) 383 break; 384 default: 385 break; 386 } 387 return offset; 388 } 389 390 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){ 391 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 392 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 393 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 394 395 btstack_assert(max_frame_size >= payload_offset); 396 return (max_frame_size - payload_offset); 397 } 398 399 400 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 401 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 402 return AVCTP_SINGLE_PACKET; 403 } 404 405 if (connection->data_offset == 0){ 406 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 407 connection->command_opcode, 408 AVCTP_SINGLE_PACKET); 409 if (max_payload_size_for_single_packet >= connection->data_len){ 410 *max_payload_size = max_payload_size_for_single_packet; 411 return AVCTP_SINGLE_PACKET; 412 } else { 413 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 414 *max_payload_size = max_payload_size_for_start_packet; 415 return AVCTP_START_PACKET; 416 } 417 } else { 418 // both packet types have the same single byte AVCTP header 419 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 420 connection->command_opcode, 421 AVCTP_CONTINUE_PACKET); 422 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 423 return AVCTP_CONTINUE_PACKET; 424 } else { 425 return AVCTP_END_PACKET; 426 } 427 } 428 } 429 430 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 431 switch (connection->avctp_packet_type) { 432 case AVCTP_SINGLE_PACKET: 433 case AVCTP_START_PACKET: 434 break; 435 default: 436 return connection->avrcp_packet_type; 437 } 438 439 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 440 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 441 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 442 443 if (connection->data_offset == 0){ 444 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 445 return AVRCP_SINGLE_PACKET; 446 } else { 447 return AVRCP_START_PACKET; 448 } 449 } else { 450 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 451 return AVRCP_CONTINUE_PACKET; 452 } else { 453 return AVRCP_END_PACKET; 454 } 455 } 456 } 457 458 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 459 btstack_linked_list_iterator_t it; 460 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 461 while (btstack_linked_list_iterator_has_next(&it)){ 462 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 463 if (connection->role != role) continue; 464 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 465 return connection; 466 } 467 return NULL; 468 } 469 470 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 471 btstack_linked_list_iterator_t it; 472 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 473 while (btstack_linked_list_iterator_has_next(&it)){ 474 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 475 if (connection->role != role) continue; 476 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 477 return connection; 478 } 479 return NULL; 480 } 481 482 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 483 btstack_linked_list_iterator_t it; 484 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 485 while (btstack_linked_list_iterator_has_next(&it)){ 486 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 487 if (connection->role != role) continue; 488 if (connection->avrcp_cid != avrcp_cid) continue; 489 return connection; 490 } 491 return NULL; 492 } 493 494 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 495 btstack_linked_list_iterator_t it; 496 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 497 while (btstack_linked_list_iterator_has_next(&it)){ 498 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 499 if (connection->role != role) continue; 500 if (connection->avrcp_browsing_cid != browsing_cid) continue; 501 return connection; 502 } 503 return NULL; 504 } 505 506 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 507 btstack_linked_list_iterator_t it; 508 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 509 while (btstack_linked_list_iterator_has_next(&it)){ 510 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 511 if (connection->role != role) continue; 512 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 513 return connection; 514 } 515 return NULL; 516 } 517 518 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 519 btstack_linked_list_iterator_t it; 520 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 521 while (btstack_linked_list_iterator_has_next(&it)){ 522 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 523 if (connection->role != role) continue; 524 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 525 return connection->browsing_connection; 526 } 527 return NULL; 528 } 529 530 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 531 connection->wait_to_send = true; 532 (void)l2cap_request_can_send_now_event(l2cap_cid); 533 } 534 535 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 536 do { 537 if (avrcp_cid_counter == 0xffff) { 538 avrcp_cid_counter = 1; 539 } else { 540 avrcp_cid_counter++; 541 } 542 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 543 return avrcp_cid_counter; 544 } 545 546 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 547 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 548 if (!connection){ 549 log_error("Not enough memory to create connection for role %d", role); 550 return NULL; 551 } 552 553 connection->state = AVCTP_CONNECTION_IDLE; 554 connection->role = role; 555 556 connection->transaction_id = 0xFF; 557 connection->transaction_id_counter = 0; 558 559 connection->controller_max_num_fragments = 0xFF; 560 561 // setup default unit / subunit info 562 connection->company_id = 0xffffff; 563 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 564 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 565 connection->target_subunit_info_data = avrcp_default_subunit_info; 566 567 log_info("avrcp_create_connection, role %d", role); 568 (void)memcpy(connection->remote_addr, remote_addr, 6); 569 btstack_linked_list_add_tail(&avrcp_connections, (btstack_linked_item_t *) connection); 570 return connection; 571 } 572 573 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 574 btstack_run_loop_remove_timer(&connection->retry_timer); 575 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 576 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 577 btstack_memory_avrcp_connection_free(connection); 578 } 579 580 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 581 btstack_assert(avrcp_callback != NULL); 582 583 uint8_t event[14]; 584 int pos = 0; 585 event[pos++] = HCI_EVENT_AVRCP_META; 586 event[pos++] = sizeof(event) - 2; 587 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 588 event[pos++] = status; 589 little_endian_store_16(event, pos, avrcp_cid); 590 pos += 2; 591 reverse_bd_addr(addr,&event[pos]); 592 pos += 6; 593 little_endian_store_16(event, pos, con_handle); 594 pos += 2; 595 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 596 } 597 598 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 599 btstack_assert(avrcp_callback != NULL); 600 601 uint8_t event[5]; 602 int pos = 0; 603 event[pos++] = HCI_EVENT_AVRCP_META; 604 event[pos++] = sizeof(event) - 2; 605 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 606 little_endian_store_16(event, pos, avrcp_cid); 607 pos += 2; 608 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 609 } 610 611 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 612 return avrcp_sdp_query_context.browsing_l2cap_psm; 613 } 614 615 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 616 des_iterator_t des_list_it; 617 618 des_iterator_t additional_protocol_descriptor_list_it; 619 des_iterator_t protocol_descriptor_list_it; 620 des_iterator_t protocol_it; 621 uint8_t protocol_descriptor_id; 622 623 // Handle new SDP record 624 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 625 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 626 avrcp_sdp_query_context.parse_sdp_record = 0; 627 // log_info("SDP Record: Nr: %d", record_id); 628 } 629 630 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 631 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 632 633 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 634 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 635 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 636 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 637 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)) { 638 uint8_t * element = des_iterator_get_element(&des_list_it); 639 if (de_get_element_type(element) != DE_UUID) continue; 640 uint32_t uuid = de_get_uuid32(element); 641 switch (uuid){ 642 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 643 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 644 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 645 avrcp_sdp_query_context.parse_sdp_record = 1; 646 break; 647 default: 648 break; 649 } 650 } 651 break; 652 653 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 654 if (!avrcp_sdp_query_context.parse_sdp_record) break; 655 656 for (des_iterator_init(&protocol_descriptor_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&protocol_descriptor_list_it); des_iterator_next(&protocol_descriptor_list_it)) { 657 658 if (des_iterator_get_type(&protocol_descriptor_list_it) != DE_DES) continue; 659 uint8_t * protocol_descriptor_list_element = des_iterator_get_element(&protocol_descriptor_list_it); 660 661 des_iterator_init(&protocol_it, protocol_descriptor_list_element); 662 uint8_t * protocol_element = des_iterator_get_element(&protocol_it); 663 664 if (de_get_element_type(protocol_element) != DE_UUID) continue; 665 666 uint32_t uuid = de_get_uuid32(protocol_element); 667 des_iterator_next(&protocol_it); 668 switch (uuid){ 669 case BLUETOOTH_PROTOCOL_L2CAP: 670 if (!des_iterator_has_more(&protocol_it)) continue; 671 de_element_get_uint16(des_iterator_get_element(&protocol_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 672 break; 673 case BLUETOOTH_PROTOCOL_AVCTP: 674 if (!des_iterator_has_more(&protocol_it)) continue; 675 de_element_get_uint16(des_iterator_get_element(&protocol_it), &avrcp_sdp_query_context.avrcp_version); 676 break; 677 default: 678 break; 679 } 680 } 681 break; 682 683 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: 684 if (!avrcp_sdp_query_context.parse_sdp_record) break; 685 686 protocol_descriptor_id = 0; 687 688 for ( des_iterator_init(&additional_protocol_descriptor_list_it, avrcp_sdp_query_attribute_value); 689 des_iterator_has_more(&additional_protocol_descriptor_list_it); 690 des_iterator_next(&additional_protocol_descriptor_list_it)) { 691 692 if (des_iterator_get_type(&additional_protocol_descriptor_list_it) != DE_DES) continue; 693 uint8_t *additional_protocol_descriptor_element = des_iterator_get_element(&additional_protocol_descriptor_list_it); 694 695 for ( des_iterator_init(&protocol_descriptor_list_it,additional_protocol_descriptor_element); 696 des_iterator_has_more(&protocol_descriptor_list_it); 697 des_iterator_next(&protocol_descriptor_list_it)) { 698 699 if (des_iterator_get_type(&protocol_descriptor_list_it) != DE_DES) continue; 700 701 uint8_t * protocol_descriptor_list_element = des_iterator_get_element(&protocol_descriptor_list_it); 702 703 des_iterator_init(&protocol_it, protocol_descriptor_list_element); 704 uint8_t * protocol_element = des_iterator_get_element(&protocol_it); 705 706 if (de_get_element_type(protocol_element) != DE_UUID) continue; 707 708 uint32_t uuid = de_get_uuid32(protocol_element); 709 des_iterator_next(&protocol_it); 710 switch (uuid) { 711 case BLUETOOTH_PROTOCOL_L2CAP: 712 if (!des_iterator_has_more(&protocol_it)) continue; 713 switch (protocol_descriptor_id) { 714 case 0: 715 de_element_get_uint16(des_iterator_get_element(&protocol_it), 716 &avrcp_sdp_query_context.browsing_l2cap_psm); 717 break; 718 case 1: 719 de_element_get_uint16(des_iterator_get_element(&protocol_it), 720 &avrcp_sdp_query_context.cover_art_l2cap_psm); 721 break; 722 default: 723 break; 724 } 725 break; 726 case BLUETOOTH_PROTOCOL_AVCTP: 727 if (!des_iterator_has_more(&protocol_it)) continue; 728 de_element_get_uint16(des_iterator_get_element(&protocol_it), 729 &avrcp_sdp_query_context.browsing_version); 730 break; 731 default: 732 break; 733 } 734 } 735 protocol_descriptor_id++; 736 } 737 break; 738 739 default: 740 break; 741 } 742 } 743 } else { 744 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)); 745 } 746 } 747 748 static void avrcp_signaling_handle_sdp_query_complete(avrcp_connection_t * connection, uint8_t status){ 749 750 // l2cap available? 751 if (status == ERROR_CODE_SUCCESS){ 752 if (avrcp_sdp_query_context.avrcp_l2cap_psm == 0){ 753 status = SDP_SERVICE_NOT_FOUND; 754 } 755 } 756 757 if (status == ERROR_CODE_SUCCESS){ 758 // ready to connect 759 connection->state = AVCTP_CONNECTION_W2_L2CAP_CONNECT; 760 761 // check if both events have been handled 762 avrcp_connection_t * connection_with_opposite_role; 763 switch (connection->role){ 764 case AVRCP_CONTROLLER: 765 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 766 break; 767 case AVRCP_TARGET: 768 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 769 break; 770 default: 771 btstack_assert(false); 772 return; 773 } 774 if (connection_with_opposite_role->state == AVCTP_CONNECTION_W2_L2CAP_CONNECT){ 775 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 776 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 777 l2cap_create_channel(&avrcp_packet_handler, connection->remote_addr, connection->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 778 } 779 } else { 780 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 781 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 782 avrcp_finalize_connection(connection); 783 } 784 } 785 786 static void avrcp_handle_sdp_query_completed(avrcp_connection_t * connection, uint8_t status){ 787 btstack_assert(connection != NULL); 788 789 // cache SDP result on success 790 if (status == ERROR_CODE_SUCCESS){ 791 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 792 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 793 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 794 #ifdef ENABLE_AVRCP_COVER_ART 795 connection->cover_art_psm = avrcp_sdp_query_context.cover_art_l2cap_psm; 796 #endif 797 } 798 799 // SDP Signaling Query? 800 if (connection->state == AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE){ 801 avrcp_signaling_handle_sdp_query_complete(connection, status); 802 return; 803 } 804 // Browsing SDP <- Browsing Connection <- Existing AVRCP Connection => it wasn't an SDP query for signaling 805 if (avrcp_browsing_sdp_query_complete_handler != NULL){ 806 (*avrcp_browsing_sdp_query_complete_handler)(connection, status); 807 } 808 #ifdef ENABLE_AVRCP_COVER_ART 809 // Cover Art SDP <- Cover Art Connection <- Existing AVRCP Connection => it wasn't an SDP query for signaling 810 if (avrcp_cover_art_sdp_query_complete_handler != NULL){ 811 (*avrcp_cover_art_sdp_query_complete_handler)(connection, status); 812 } 813 #endif 814 } 815 816 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 817 UNUSED(packet_type); 818 UNUSED(channel); 819 UNUSED(size); 820 821 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 822 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 823 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 824 825 if (!state_ok){ 826 // something wrong, nevertheless, start next sdp query if this one is complete 827 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 828 avrcp_sdp_query_context.avrcp_cid = 0; 829 avrcp_start_next_sdp_query(); 830 } 831 return; 832 } 833 834 uint8_t status; 835 836 switch (hci_event_packet_get_type(packet)){ 837 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 838 avrcp_handle_sdp_client_query_attribute_value(packet); 839 return; 840 841 case SDP_EVENT_QUERY_COMPLETE: 842 // handle result 843 status = sdp_event_query_complete_get_status(packet); 844 avrcp_handle_sdp_query_completed(avrcp_controller_connection, status); 845 avrcp_handle_sdp_query_completed(avrcp_target_connection, status); 846 847 // query done, start next one 848 avrcp_sdp_query_context.avrcp_cid = 0; 849 avrcp_start_next_sdp_query(); 850 break; 851 852 default: 853 return; 854 } 855 856 } 857 858 static void avrcp_handle_start_sdp_client_query(void * context){ 859 UNUSED(context); 860 861 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 862 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 863 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 864 if (state_ok == false){ 865 // connection seems to got finalized in the meantime, just trigger next query 866 avrcp_start_next_sdp_query(); 867 return; 868 } 869 870 // prevent triggering SDP query twice (for each role once) 871 avrcp_target_connection->trigger_sdp_query = false; 872 avrcp_controller_connection->trigger_sdp_query = false; 873 874 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, avrcp_target_connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 875 } 876 877 static void avrcp_start_next_sdp_query(void) { 878 if (avrcp_sdp_query_context.avrcp_cid != 0) { 879 return; 880 } 881 btstack_linked_list_iterator_t it; 882 btstack_linked_list_iterator_init(&it, &avrcp_connections); 883 while (btstack_linked_list_iterator_has_next(&it)){ 884 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 885 if (connection->trigger_sdp_query == false) continue; 886 887 // we're ready => setup avrcp_sdp_query_context and request sdp query 888 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 889 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 890 avrcp_sdp_query_context.avrcp_version = 0; 891 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 892 uint8_t status = sdp_client_register_query_callback(&avrcp_sdp_query_registration); 893 btstack_assert(status == ERROR_CODE_SUCCESS); 894 UNUSED(status); 895 break; 896 } 897 } 898 899 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){ 900 if (connection == NULL){ 901 connection = avrcp_create_connection(role, event_addr); 902 } 903 if (connection) { 904 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 905 connection->l2cap_signaling_cid = local_cid; 906 connection->avrcp_cid = avrcp_cid; 907 connection->con_handle = con_handle; 908 btstack_run_loop_remove_timer(&connection->retry_timer); 909 } 910 return connection; 911 } 912 913 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 914 connection->l2cap_signaling_cid = local_cid; 915 connection->l2cap_mtu = l2cap_mtu; 916 connection->con_handle = con_handle; 917 connection->incoming_declined = false; 918 connection->target_song_length_ms = 0xFFFFFFFF; 919 connection->target_song_position_ms = 0xFFFFFFFF; 920 memset(connection->target_track_id, 0xFF, 8); 921 connection->target_track_selected = false; 922 connection->target_track_changed = false; 923 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 924 connection->state = AVCTP_CONNECTION_OPENED; 925 926 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); 927 } 928 929 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 930 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 931 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 932 if (connection_controller == NULL) return; 933 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 934 if (connection_target == NULL) return; 935 936 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 937 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 938 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 939 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 940 } 941 } 942 943 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 944 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 945 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 946 947 // add some jitter/randomness to reconnect delay 948 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 949 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 950 951 btstack_run_loop_add_timer(&connection->retry_timer); 952 } 953 954 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 955 return (avrcp_frame_type_t)((header & 0x02) >> 1); 956 } 957 958 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 959 UNUSED(channel); 960 UNUSED(size); 961 bd_addr_t event_addr; 962 uint16_t local_cid; 963 uint16_t l2cap_mtu; 964 uint8_t status; 965 bool decline_connection; 966 bool outoing_active; 967 bool connection_already_established; 968 hci_con_handle_t con_handle; 969 970 avrcp_connection_t * connection_controller; 971 avrcp_connection_t * connection_target; 972 bool can_send; 973 974 switch (packet_type) { 975 case HCI_EVENT_PACKET: 976 switch (hci_event_packet_get_type(packet)) { 977 978 case L2CAP_EVENT_INCOMING_CONNECTION: 979 btstack_assert(avrcp_controller_packet_handler != NULL); 980 btstack_assert(avrcp_target_packet_handler != NULL); 981 982 l2cap_event_incoming_connection_get_address(packet, event_addr); 983 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 984 con_handle = l2cap_event_incoming_connection_get_handle(packet); 985 986 outoing_active = false; 987 connection_already_established = false; 988 989 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 990 if (connection_target != NULL){ 991 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 992 outoing_active = true; 993 connection_target->incoming_declined = true; 994 } 995 if (connection_target->state >= AVCTP_CONNECTION_OPENED){ 996 connection_already_established = true; 997 } 998 } 999 1000 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1001 if (connection_controller != NULL){ 1002 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 1003 outoing_active = true; 1004 connection_controller->incoming_declined = true; 1005 } 1006 if (connection_controller->state >= AVCTP_CONNECTION_OPENED){ 1007 connection_already_established = true; 1008 } 1009 } 1010 1011 decline_connection = outoing_active || connection_already_established; 1012 if (decline_connection == false){ 1013 uint16_t avrcp_cid; 1014 if ((connection_controller == NULL) || (connection_target == NULL)){ 1015 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1016 } else { 1017 avrcp_cid = connection_controller->avrcp_cid; 1018 } 1019 // create two connection objects (both) 1020 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 1021 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 1022 if ((connection_target == NULL) || (connection_controller == NULL)){ 1023 decline_connection = true; 1024 if (connection_target) { 1025 avrcp_finalize_connection(connection_target); 1026 } 1027 if (connection_controller) { 1028 avrcp_finalize_connection(connection_controller); 1029 } 1030 } 1031 } 1032 if (decline_connection){ 1033 log_info("Decline connection 0x%04x: outgoing active %u, connection already established: %u", local_cid, outoing_active, connection_already_established); 1034 l2cap_decline_connection(local_cid); 1035 } else { 1036 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%04x, state %d", local_cid, connection_controller->state); 1037 l2cap_accept_connection(local_cid); 1038 } 1039 break; 1040 1041 case L2CAP_EVENT_CHANNEL_OPENED: 1042 l2cap_event_channel_opened_get_address(packet, event_addr); 1043 status = l2cap_event_channel_opened_get_status(packet); 1044 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 1045 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 1046 con_handle = l2cap_event_channel_opened_get_handle(packet); 1047 1048 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1049 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 1050 1051 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 1052 // outgoing: structs are cteated in avrcp_connect() 1053 if ((connection_controller == NULL) || (connection_target == NULL)) { 1054 break; 1055 } 1056 1057 switch (status){ 1058 case ERROR_CODE_SUCCESS: 1059 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 1060 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 1061 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1062 return; 1063 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 1064 if (connection_controller->incoming_declined == true){ 1065 log_info("Incoming connection was declined, and the outgoing failed"); 1066 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1067 connection_controller->incoming_declined = false; 1068 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1069 connection_target->incoming_declined = false; 1070 avrcp_retry_timer_start(connection_controller); 1071 return; 1072 } 1073 break; 1074 default: 1075 break; 1076 } 1077 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 1078 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1079 avrcp_finalize_connection(connection_controller); 1080 avrcp_finalize_connection(connection_target); 1081 1082 break; 1083 1084 case L2CAP_EVENT_CHANNEL_CLOSED: 1085 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1086 1087 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1088 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1089 if ((connection_controller == NULL) || (connection_target == NULL)) { 1090 break; 1091 } 1092 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 1093 avrcp_finalize_connection(connection_controller); 1094 avrcp_finalize_connection(connection_target); 1095 break; 1096 1097 case L2CAP_EVENT_CAN_SEND_NOW: 1098 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 1099 can_send = true; 1100 1101 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1102 if ((connection_target != NULL) && connection_target->wait_to_send){ 1103 connection_target->wait_to_send = false; 1104 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1105 can_send = false; 1106 } 1107 1108 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1109 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 1110 if (can_send){ 1111 connection_controller->wait_to_send = false; 1112 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1113 } else { 1114 l2cap_request_can_send_now_event(local_cid); 1115 } 1116 } 1117 break; 1118 1119 default: 1120 break; 1121 } 1122 break; 1123 1124 case L2CAP_DATA_PACKET: 1125 switch (avrcp_get_frame_type(packet[0])){ 1126 case AVRCP_RESPONSE_FRAME: 1127 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1128 break; 1129 case AVRCP_COMMAND_FRAME: 1130 default: // make compiler happy 1131 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1132 break; 1133 } 1134 break; 1135 1136 default: 1137 break; 1138 } 1139 } 1140 1141 void avrcp_init(void){ 1142 avrcp_connections = NULL; 1143 if (avrcp_l2cap_service_registered) return; 1144 1145 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1146 if (status != ERROR_CODE_SUCCESS) return; 1147 avrcp_l2cap_service_registered = true; 1148 } 1149 1150 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1151 // note: called by avrcp_controller_init 1152 avrcp_controller_packet_handler = callback; 1153 } 1154 1155 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1156 // note: called by avrcp_target_init 1157 avrcp_target_packet_handler = callback; 1158 } 1159 1160 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1161 btstack_assert(callback != NULL); 1162 avrcp_callback = callback; 1163 } 1164 1165 void avrcp_register_browsing_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1166 btstack_assert(callback != NULL); 1167 avrcp_browsing_sdp_query_complete_handler = callback; 1168 } 1169 1170 #ifdef ENABLE_AVRCP_COVER_ART 1171 void avrcp_register_cover_art_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1172 btstack_assert(callback != NULL); 1173 avrcp_cover_art_sdp_query_complete_handler = callback; 1174 } 1175 #endif 1176 1177 void avrcp_trigger_sdp_query(avrcp_connection_t *connection_controller, avrcp_connection_t *connection_target) { 1178 connection_controller->trigger_sdp_query = true; 1179 connection_target->trigger_sdp_query = true; 1180 1181 avrcp_start_next_sdp_query(); 1182 } 1183 1184 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1185 btstack_assert(avrcp_controller_packet_handler != NULL); 1186 btstack_assert(avrcp_target_packet_handler != NULL); 1187 1188 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1189 bool setup_active = false; 1190 if (connection_controller){ 1191 // allow to call avrcp_connect after signaling connection was triggered remotely 1192 // @note this also allows to call avrcp_connect again before SLC is complete 1193 if (connection_controller->state < AVCTP_CONNECTION_OPENED){ 1194 setup_active = true; 1195 } else { 1196 return ERROR_CODE_COMMAND_DISALLOWED; 1197 } 1198 } 1199 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1200 if (connection_target){ 1201 if (connection_target->state < AVCTP_CONNECTION_OPENED){ 1202 setup_active = true; 1203 } else { 1204 return ERROR_CODE_COMMAND_DISALLOWED; 1205 } 1206 } 1207 if (setup_active){ 1208 return ERROR_CODE_SUCCESS; 1209 } 1210 1211 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1212 1213 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1214 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1215 1216 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1217 if (!connection_target){ 1218 avrcp_finalize_connection(connection_controller); 1219 return BTSTACK_MEMORY_ALLOC_FAILED; 1220 } 1221 1222 if (avrcp_cid != NULL){ 1223 *avrcp_cid = cid; 1224 } 1225 1226 connection_controller->avrcp_cid = cid; 1227 connection_target->avrcp_cid = cid; 1228 1229 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1230 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1231 1232 avrcp_trigger_sdp_query(connection_controller, connection_target); 1233 1234 return ERROR_CODE_SUCCESS; 1235 } 1236 1237 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1238 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1239 if (!connection_controller){ 1240 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1241 } 1242 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1243 if (!connection_target){ 1244 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1245 } 1246 if (connection_controller->browsing_connection){ 1247 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1248 } 1249 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1250 return ERROR_CODE_SUCCESS; 1251 } 1252 1253 void avrcp_deinit(void){ 1254 avrcp_l2cap_service_registered = false; 1255 1256 avrcp_cid_counter = 0; 1257 avrcp_connections = NULL; 1258 1259 avrcp_callback = NULL; 1260 avrcp_controller_packet_handler = NULL; 1261 avrcp_target_packet_handler = NULL; 1262 1263 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1264 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1265 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1266 } 1267 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1268 #define FUZZ_CID 0x44 1269 #define FUZZ_CON_HANDLE 0x0001 1270 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1271 void avrcp_init_fuzz(void){ 1272 // setup avrcp connections for cid 1273 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1274 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1275 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1276 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1277 } 1278 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1279 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1280 } 1281 #endif 1282