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/avrcp.h" 51 #include "classic/sdp_client.h" 52 #include "classic/sdp_util.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 uint16_t cover_art_l2cap_psm; 65 } avrcp_sdp_query_context_t; 66 67 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 68 static void avrcp_start_next_sdp_query(void); 69 70 static const char * avrcp_subunit_type_name[] = { 71 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 72 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 73 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 74 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 75 }; 76 77 // default subunit info: single PANEL subunit 78 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 79 80 // globals 81 static bool avrcp_l2cap_service_registered = false; 82 83 // connections 84 static uint16_t avrcp_cid_counter; 85 static btstack_linked_list_t avrcp_connections; 86 87 // higher layer callbacks 88 static btstack_packet_handler_t avrcp_callback; 89 static btstack_packet_handler_t avrcp_controller_packet_handler; 90 static btstack_packet_handler_t avrcp_target_packet_handler; 91 92 // sdp query 93 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 94 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 95 static uint8_t avrcp_sdp_query_attribute_value[45]; 96 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 97 98 static void (*avrcp_browsing_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 99 #ifdef ENABLE_AVRCP_COVER_ART 100 static void (*avrcp_cover_art_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 101 #endif 102 103 const char * avrcp_subunit2str(uint16_t index){ 104 if (index <= 11) return avrcp_subunit_type_name[index]; 105 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 106 return avrcp_subunit_type_name[16]; 107 } 108 109 static const char * avrcp_event_name[] = { 110 "ERROR", "PLAYBACK_STATUS_CHANGED", 111 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 112 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 113 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 114 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 115 }; 116 const char * avrcp_event2str(uint16_t index){ 117 if (index <= 0x0d) return avrcp_event_name[index]; 118 return avrcp_event_name[0]; 119 } 120 121 static const char * avrcp_operation_name[] = { 122 "SKIP", NULL, NULL, NULL, NULL, 123 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 124 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 125 }; 126 127 const char * avrcp_operation2str(uint8_t operation_id){ 128 char * name = NULL; 129 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 130 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 131 } 132 if (name == NULL){ 133 static char buffer[13]; 134 btstack_snprintf_assert_complete(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 135 buffer[sizeof(buffer)-1] = 0; 136 return buffer; 137 } else { 138 return name; 139 } 140 } 141 142 static const char * avrcp_media_attribute_id_name[] = { 143 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 144 }; 145 const char * avrcp_attribute2str(uint8_t index){ 146 if (index > 7){ 147 index = 0; 148 } 149 return avrcp_media_attribute_id_name[0]; 150 } 151 152 static const char * avrcp_play_status_name[] = { 153 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 154 "ERROR" // 0xFF 155 }; 156 const char * avrcp_play_status2str(uint8_t index){ 157 if (index > 4){ 158 index = 5; 159 } 160 return avrcp_play_status_name[index]; 161 } 162 163 static const char * avrcp_ctype_name[] = { 164 "CONTROL", 165 "STATUS", 166 "SPECIFIC_INQUIRY", 167 "NOTIFY", 168 "GENERAL_INQUIRY", 169 "RESERVED5", 170 "RESERVED6", 171 "RESERVED7", 172 "NOT IMPLEMENTED IN REMOTE", 173 "ACCEPTED BY REMOTE", 174 "REJECTED BY REMOTE", 175 "IN_TRANSITION", 176 "IMPLEMENTED_STABLE", 177 "CHANGED_STABLE", 178 "RESERVED", 179 "INTERIM" 180 }; 181 static const uint16_t avrcp_ctype_name_num = 16; 182 183 const char * avrcp_ctype2str(uint8_t index){ 184 if (index < avrcp_ctype_name_num){ 185 return avrcp_ctype_name[index]; 186 } 187 return "NONE"; 188 } 189 190 static const char * avrcp_shuffle_mode_name[] = { 191 "SHUFFLE OFF", 192 "SHUFFLE ALL TRACKS", 193 "SHUFFLE GROUP" 194 }; 195 196 const char * avrcp_shuffle2str(uint8_t index){ 197 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 198 return "NONE"; 199 } 200 201 static const char * avrcp_repeat_mode_name[] = { 202 "REPEAT OFF", 203 "REPEAT SINGLE TRACK", 204 "REPEAT ALL TRACKS", 205 "REPEAT GROUP" 206 }; 207 208 const char * avrcp_repeat2str(uint8_t index){ 209 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 210 return "NONE"; 211 } 212 213 static const char * notification_name[] = { 214 "INVALID_INDEX", 215 "PLAYBACK_STATUS_CHANGED", 216 "TRACK_CHANGED", 217 "TRACK_REACHED_END", 218 "TRACK_REACHED_START", 219 "PLAYBACK_POS_CHANGED", 220 "BATT_STATUS_CHANGED", 221 "SYSTEM_STATUS_CHANGED", 222 "PLAYER_APPLICATION_SETTING_CHANGED", 223 "NOW_PLAYING_CONTENT_CHANGED", 224 "AVAILABLE_PLAYERS_CHANGED", 225 "ADDRESSED_PLAYER_CHANGED", 226 "UIDS_CHANGED", 227 "VOLUME_CHANGED", 228 "MAX_VALUE" 229 }; 230 231 const char * avrcp_notification2str(avrcp_notification_event_id_t index){ 232 if ((index >= AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) && (index <= AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 233 return notification_name[index]; 234 } 235 return notification_name[0]; 236 } 237 238 btstack_linked_list_t avrcp_get_connections(void){ 239 return avrcp_connections; 240 } 241 242 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 243 uint8_t cmd_opcode_index = 5; 244 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 245 return packet[cmd_opcode_index]; 246 } 247 248 void avrcp_create_sdp_record(bool controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 249 const char * service_name, const char * service_provider_name){ 250 uint8_t* attribute; 251 de_create_sequence(service); 252 253 // 0x0000 "Service Record Handle" 254 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 255 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 256 257 // 0x0001 "Service Class ID List" 258 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 259 attribute = de_push_sequence(service); 260 { 261 if (controller){ 262 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 263 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 264 } else { 265 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 266 } 267 } 268 de_pop_sequence(service, attribute); 269 270 // 0x0004 "Protocol Descriptor List" 271 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 272 attribute = de_push_sequence(service); 273 { 274 uint8_t* l2cpProtocol = de_push_sequence(attribute); 275 { 276 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 277 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 278 } 279 de_pop_sequence(attribute, l2cpProtocol); 280 281 uint8_t* avctpProtocol = de_push_sequence(attribute); 282 { 283 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 284 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 285 } 286 de_pop_sequence(attribute, avctpProtocol); 287 } 288 de_pop_sequence(service, attribute); 289 290 // 0x0005 "Public Browse Group" 291 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 292 attribute = de_push_sequence(service); 293 { 294 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 295 } 296 de_pop_sequence(service, attribute); 297 298 // 0x0009 "Bluetooth Profile Descriptor List" 299 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 300 attribute = de_push_sequence(service); 301 { 302 uint8_t *avrcProfile = de_push_sequence(attribute); 303 { 304 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 305 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 306 } 307 de_pop_sequence(attribute, avrcProfile); 308 } 309 de_pop_sequence(service, attribute); 310 311 // 0x000d "Additional Bluetooth Profile Descriptor List" 312 if (browsing){ 313 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 314 attribute = de_push_sequence(service); 315 { 316 uint8_t * des = de_push_sequence(attribute); 317 { 318 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 319 { 320 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 321 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 322 } 323 de_pop_sequence(des, browsing_l2cpProtocol); 324 325 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 326 { 327 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 328 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 329 } 330 de_pop_sequence(des, browsing_avctpProtocol); 331 } 332 de_pop_sequence(attribute, des); 333 } 334 de_pop_sequence(service, attribute); 335 } 336 337 338 // 0x0100 "Service Name" 339 if (strlen(service_name) > 0){ 340 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 341 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 342 } 343 344 // 0x0100 "Provider Name" 345 if (strlen(service_provider_name) > 0){ 346 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 347 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 348 } 349 350 // 0x0311 "Supported Features" 351 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SUPPORTED_FEATURES); 352 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 353 } 354 355 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 356 switch (avctp_packet_type){ 357 case AVCTP_SINGLE_PACKET: 358 // AVCTP message: transport header (1), pid (2) 359 return 3; 360 case AVCTP_START_PACKET: 361 // AVCTP message: transport header (1), num_packets (1), pid (2) 362 return 4; 363 default: 364 // AVCTP message: transport header (1) 365 return 1; 366 } 367 } 368 369 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 370 switch (avctp_packet_type){ 371 case AVCTP_SINGLE_PACKET: 372 case AVCTP_START_PACKET: 373 break; 374 default: 375 return 0; 376 } 377 378 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 379 switch (command_opcode){ 380 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 381 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 382 break; 383 case AVRCP_CMD_OPCODE_PASS_THROUGH: 384 offset += 3; // AVRCP message: operation id (1), param_len (2) 385 break; 386 default: 387 break; 388 } 389 return offset; 390 } 391 392 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){ 393 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 394 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 395 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 396 397 btstack_assert(max_frame_size >= payload_offset); 398 return (max_frame_size - payload_offset); 399 } 400 401 402 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 403 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 404 return AVCTP_SINGLE_PACKET; 405 } 406 407 if (connection->data_offset == 0){ 408 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 409 connection->command_opcode, 410 AVCTP_SINGLE_PACKET); 411 if (max_payload_size_for_single_packet >= connection->data_len){ 412 *max_payload_size = max_payload_size_for_single_packet; 413 return AVCTP_SINGLE_PACKET; 414 } else { 415 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 416 *max_payload_size = max_payload_size_for_start_packet; 417 return AVCTP_START_PACKET; 418 } 419 } else { 420 // both packet types have the same single byte AVCTP header 421 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 422 connection->command_opcode, 423 AVCTP_CONTINUE_PACKET); 424 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 425 return AVCTP_CONTINUE_PACKET; 426 } else { 427 return AVCTP_END_PACKET; 428 } 429 } 430 } 431 432 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 433 switch (connection->avctp_packet_type) { 434 case AVCTP_SINGLE_PACKET: 435 case AVCTP_START_PACKET: 436 break; 437 default: 438 return connection->avrcp_packet_type; 439 } 440 441 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 442 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 443 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 444 445 if (connection->data_offset == 0){ 446 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 447 return AVRCP_SINGLE_PACKET; 448 } else { 449 return AVRCP_START_PACKET; 450 } 451 } else { 452 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 453 return AVRCP_CONTINUE_PACKET; 454 } else { 455 return AVRCP_END_PACKET; 456 } 457 } 458 } 459 460 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 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 (memcmp(addr, connection->remote_addr, 6) != 0) continue; 467 return connection; 468 } 469 return NULL; 470 } 471 472 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_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->l2cap_signaling_cid != l2cap_cid) continue; 479 return connection; 480 } 481 return NULL; 482 } 483 484 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_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->avrcp_cid != avrcp_cid) continue; 491 return connection; 492 } 493 return NULL; 494 } 495 496 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_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->avrcp_browsing_cid != browsing_cid) continue; 503 return connection; 504 } 505 return NULL; 506 } 507 508 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 509 btstack_linked_list_iterator_t it; 510 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 511 while (btstack_linked_list_iterator_has_next(&it)){ 512 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 513 if (connection->role != role) continue; 514 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 515 return connection; 516 } 517 return NULL; 518 } 519 520 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 521 btstack_linked_list_iterator_t it; 522 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 523 while (btstack_linked_list_iterator_has_next(&it)){ 524 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 525 if (connection->role != role) continue; 526 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 527 return connection->browsing_connection; 528 } 529 return NULL; 530 } 531 532 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 533 connection->wait_to_send = true; 534 l2cap_request_can_send_now_event(l2cap_cid); 535 } 536 537 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 538 do { 539 if (avrcp_cid_counter == 0xffff) { 540 avrcp_cid_counter = 1; 541 } else { 542 avrcp_cid_counter++; 543 } 544 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 545 return avrcp_cid_counter; 546 } 547 548 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 549 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 550 if (!connection){ 551 log_error("Not enough memory to create connection for role %d", role); 552 return NULL; 553 } 554 555 connection->state = AVCTP_CONNECTION_IDLE; 556 connection->role = role; 557 558 connection->transaction_id = 0xFF; 559 connection->transaction_id_counter = 0; 560 561 connection->controller_max_num_fragments = 0xFF; 562 563 // setup default unit / subunit info 564 connection->company_id = 0xffffff; 565 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 566 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 567 connection->target_subunit_info_data = avrcp_default_subunit_info; 568 569 log_info("avrcp_create_connection, role %d", role); 570 (void)memcpy(connection->remote_addr, remote_addr, 6); 571 btstack_linked_list_add_tail(&avrcp_connections, (btstack_linked_item_t *) connection); 572 return connection; 573 } 574 575 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 576 btstack_run_loop_remove_timer(&connection->retry_timer); 577 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 578 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 579 btstack_memory_avrcp_connection_free(connection); 580 } 581 582 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 583 btstack_assert(avrcp_callback != NULL); 584 585 uint8_t event[14]; 586 int pos = 0; 587 event[pos++] = HCI_EVENT_AVRCP_META; 588 event[pos++] = sizeof(event) - 2; 589 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 590 event[pos++] = status; 591 little_endian_store_16(event, pos, avrcp_cid); 592 pos += 2; 593 reverse_bd_addr(addr,&event[pos]); 594 pos += 6; 595 little_endian_store_16(event, pos, con_handle); 596 pos += 2; 597 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 598 } 599 600 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 601 btstack_assert(avrcp_callback != NULL); 602 603 uint8_t event[5]; 604 int pos = 0; 605 event[pos++] = HCI_EVENT_AVRCP_META; 606 event[pos++] = sizeof(event) - 2; 607 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 608 little_endian_store_16(event, pos, avrcp_cid); 609 pos += 2; 610 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 611 } 612 613 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 614 return avrcp_sdp_query_context.browsing_l2cap_psm; 615 } 616 617 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 618 des_iterator_t des_list_it; 619 620 des_iterator_t additional_protocol_descriptor_list_it; 621 des_iterator_t protocol_descriptor_list_it; 622 des_iterator_t protocol_it; 623 uint8_t protocol_descriptor_id; 624 625 // Handle new SDP record 626 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 627 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 628 avrcp_sdp_query_context.parse_sdp_record = 0; 629 // log_info("SDP Record: Nr: %d", record_id); 630 } 631 632 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 633 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 634 635 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 636 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 637 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 638 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 639 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)) { 640 uint8_t * element = des_iterator_get_element(&des_list_it); 641 if (de_get_element_type(element) != DE_UUID) continue; 642 uint32_t uuid = de_get_uuid32(element); 643 switch (uuid){ 644 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 645 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 646 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 647 avrcp_sdp_query_context.parse_sdp_record = 1; 648 break; 649 default: 650 break; 651 } 652 } 653 break; 654 655 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 656 if (!avrcp_sdp_query_context.parse_sdp_record) break; 657 658 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)) { 659 660 if (des_iterator_get_type(&protocol_descriptor_list_it) != DE_DES) continue; 661 uint8_t * protocol_descriptor_list_element = des_iterator_get_element(&protocol_descriptor_list_it); 662 663 des_iterator_init(&protocol_it, protocol_descriptor_list_element); 664 uint8_t * protocol_element = des_iterator_get_element(&protocol_it); 665 666 if (de_get_element_type(protocol_element) != DE_UUID) continue; 667 668 uint32_t uuid = de_get_uuid32(protocol_element); 669 des_iterator_next(&protocol_it); 670 switch (uuid){ 671 case BLUETOOTH_PROTOCOL_L2CAP: 672 if (!des_iterator_has_more(&protocol_it)) continue; 673 de_element_get_uint16(des_iterator_get_element(&protocol_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 674 break; 675 case BLUETOOTH_PROTOCOL_AVCTP: 676 if (!des_iterator_has_more(&protocol_it)) continue; 677 de_element_get_uint16(des_iterator_get_element(&protocol_it), &avrcp_sdp_query_context.avrcp_version); 678 break; 679 default: 680 break; 681 } 682 } 683 break; 684 685 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: 686 if (!avrcp_sdp_query_context.parse_sdp_record) break; 687 688 protocol_descriptor_id = 0; 689 690 for ( des_iterator_init(&additional_protocol_descriptor_list_it, avrcp_sdp_query_attribute_value); 691 des_iterator_has_more(&additional_protocol_descriptor_list_it); 692 des_iterator_next(&additional_protocol_descriptor_list_it)) { 693 694 if (des_iterator_get_type(&additional_protocol_descriptor_list_it) != DE_DES) continue; 695 uint8_t *additional_protocol_descriptor_element = des_iterator_get_element(&additional_protocol_descriptor_list_it); 696 697 for ( des_iterator_init(&protocol_descriptor_list_it,additional_protocol_descriptor_element); 698 des_iterator_has_more(&protocol_descriptor_list_it); 699 des_iterator_next(&protocol_descriptor_list_it)) { 700 701 if (des_iterator_get_type(&protocol_descriptor_list_it) != DE_DES) continue; 702 703 uint8_t * protocol_descriptor_list_element = des_iterator_get_element(&protocol_descriptor_list_it); 704 705 des_iterator_init(&protocol_it, protocol_descriptor_list_element); 706 uint8_t * protocol_element = des_iterator_get_element(&protocol_it); 707 708 if (de_get_element_type(protocol_element) != DE_UUID) continue; 709 710 uint32_t uuid = de_get_uuid32(protocol_element); 711 des_iterator_next(&protocol_it); 712 switch (uuid) { 713 case BLUETOOTH_PROTOCOL_L2CAP: 714 if (!des_iterator_has_more(&protocol_it)) continue; 715 switch (protocol_descriptor_id) { 716 case 0: 717 de_element_get_uint16(des_iterator_get_element(&protocol_it), 718 &avrcp_sdp_query_context.browsing_l2cap_psm); 719 break; 720 case 1: 721 de_element_get_uint16(des_iterator_get_element(&protocol_it), 722 &avrcp_sdp_query_context.cover_art_l2cap_psm); 723 break; 724 default: 725 break; 726 } 727 break; 728 case BLUETOOTH_PROTOCOL_AVCTP: 729 if (!des_iterator_has_more(&protocol_it)) continue; 730 de_element_get_uint16(des_iterator_get_element(&protocol_it), 731 &avrcp_sdp_query_context.browsing_version); 732 break; 733 default: 734 break; 735 } 736 } 737 protocol_descriptor_id++; 738 } 739 break; 740 741 default: 742 break; 743 } 744 } 745 } else { 746 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)); 747 } 748 } 749 750 static void avrcp_signaling_handle_sdp_query_complete(avrcp_connection_t * connection, uint8_t status){ 751 752 // l2cap available? 753 if (status == ERROR_CODE_SUCCESS){ 754 if (avrcp_sdp_query_context.avrcp_l2cap_psm == 0){ 755 status = SDP_SERVICE_NOT_FOUND; 756 } 757 } 758 759 if (status == ERROR_CODE_SUCCESS){ 760 // ready to connect 761 connection->state = AVCTP_CONNECTION_W2_L2CAP_CONNECT; 762 763 // check if both events have been handled 764 avrcp_connection_t * connection_with_opposite_role; 765 switch (connection->role){ 766 case AVRCP_CONTROLLER: 767 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 768 break; 769 case AVRCP_TARGET: 770 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 771 break; 772 default: 773 btstack_assert(false); 774 return; 775 } 776 if (connection_with_opposite_role->state == AVCTP_CONNECTION_W2_L2CAP_CONNECT){ 777 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 778 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 779 l2cap_create_channel(&avrcp_packet_handler, connection->remote_addr, connection->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 780 } 781 } else { 782 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 783 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 784 avrcp_finalize_connection(connection); 785 } 786 } 787 788 static void avrcp_handle_sdp_query_completed(avrcp_connection_t * connection, uint8_t status){ 789 btstack_assert(connection != NULL); 790 791 // cache SDP result on success 792 if (status == ERROR_CODE_SUCCESS){ 793 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 794 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 795 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 796 #ifdef ENABLE_AVRCP_COVER_ART 797 connection->cover_art_psm = avrcp_sdp_query_context.cover_art_l2cap_psm; 798 #endif 799 } 800 801 // SDP Signaling Query? 802 if (connection->state == AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE){ 803 avrcp_signaling_handle_sdp_query_complete(connection, status); 804 return; 805 } 806 // Browsing SDP <- Browsing Connection <- Existing AVRCP Connection => it wasn't an SDP query for signaling 807 if (avrcp_browsing_sdp_query_complete_handler != NULL){ 808 (*avrcp_browsing_sdp_query_complete_handler)(connection, status); 809 } 810 #ifdef ENABLE_AVRCP_COVER_ART 811 // Cover Art SDP <- Cover Art Connection <- Existing AVRCP Connection => it wasn't an SDP query for signaling 812 if (avrcp_cover_art_sdp_query_complete_handler != NULL){ 813 (*avrcp_cover_art_sdp_query_complete_handler)(connection, status); 814 } 815 #endif 816 } 817 818 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 819 UNUSED(packet_type); 820 UNUSED(channel); 821 UNUSED(size); 822 823 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 824 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 825 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 826 827 if (!state_ok){ 828 // something wrong, nevertheless, start next sdp query if this one is complete 829 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 830 avrcp_sdp_query_context.avrcp_cid = 0; 831 avrcp_start_next_sdp_query(); 832 } 833 return; 834 } 835 836 uint8_t status; 837 838 switch (hci_event_packet_get_type(packet)){ 839 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 840 avrcp_handle_sdp_client_query_attribute_value(packet); 841 return; 842 843 case SDP_EVENT_QUERY_COMPLETE: 844 // handle result 845 status = sdp_event_query_complete_get_status(packet); 846 avrcp_handle_sdp_query_completed(avrcp_controller_connection, status); 847 avrcp_handle_sdp_query_completed(avrcp_target_connection, status); 848 849 // query done, start next one 850 avrcp_sdp_query_context.avrcp_cid = 0; 851 avrcp_start_next_sdp_query(); 852 break; 853 854 default: 855 return; 856 } 857 858 } 859 860 static void avrcp_handle_start_sdp_client_query(void * context){ 861 UNUSED(context); 862 863 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 864 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 865 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 866 if (state_ok == false){ 867 // connection seems to got finalized in the meantime, just trigger next query 868 avrcp_start_next_sdp_query(); 869 return; 870 } 871 872 // prevent triggering SDP query twice (for each role once) 873 avrcp_target_connection->trigger_sdp_query = false; 874 avrcp_controller_connection->trigger_sdp_query = false; 875 876 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, avrcp_target_connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 877 } 878 879 static void avrcp_start_next_sdp_query(void) { 880 if (avrcp_sdp_query_context.avrcp_cid != 0) { 881 return; 882 } 883 btstack_linked_list_iterator_t it; 884 btstack_linked_list_iterator_init(&it, &avrcp_connections); 885 while (btstack_linked_list_iterator_has_next(&it)){ 886 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 887 if (connection->trigger_sdp_query == false) continue; 888 889 // we're ready => setup avrcp_sdp_query_context and request sdp query 890 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 891 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 892 avrcp_sdp_query_context.avrcp_version = 0; 893 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 894 uint8_t status = sdp_client_register_query_callback(&avrcp_sdp_query_registration); 895 btstack_assert(status == ERROR_CODE_SUCCESS); 896 UNUSED(status); 897 break; 898 } 899 } 900 901 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){ 902 if (connection == NULL){ 903 connection = avrcp_create_connection(role, event_addr); 904 } 905 if (connection) { 906 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 907 connection->l2cap_signaling_cid = local_cid; 908 connection->avrcp_cid = avrcp_cid; 909 connection->con_handle = con_handle; 910 btstack_run_loop_remove_timer(&connection->retry_timer); 911 } 912 return connection; 913 } 914 915 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 916 connection->l2cap_signaling_cid = local_cid; 917 connection->l2cap_mtu = l2cap_mtu; 918 connection->con_handle = con_handle; 919 connection->incoming_declined = false; 920 connection->target_song_length_ms = 0xFFFFFFFF; 921 connection->target_song_position_ms = 0xFFFFFFFF; 922 memset(connection->target_track_id, 0xFF, 8); 923 connection->target_track_selected = false; 924 connection->target_track_changed = false; 925 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 926 connection->state = AVCTP_CONNECTION_OPENED; 927 928 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); 929 } 930 931 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 932 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 933 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 934 if (connection_controller == NULL) return; 935 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 936 if (connection_target == NULL) return; 937 938 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 939 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 940 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 941 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 942 } 943 } 944 945 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 946 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 947 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 948 949 // add some jitter/randomness to reconnect delay 950 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 951 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 952 953 btstack_run_loop_add_timer(&connection->retry_timer); 954 } 955 956 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 957 return (avrcp_frame_type_t)((header & 0x02) >> 1); 958 } 959 960 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 961 UNUSED(channel); 962 UNUSED(size); 963 bd_addr_t event_addr; 964 uint16_t local_cid; 965 uint16_t l2cap_mtu; 966 uint8_t status; 967 bool decline_connection; 968 bool outoing_active; 969 bool connection_already_established; 970 hci_con_handle_t con_handle; 971 972 avrcp_connection_t * connection_controller; 973 avrcp_connection_t * connection_target; 974 bool can_send; 975 976 switch (packet_type) { 977 case HCI_EVENT_PACKET: 978 switch (hci_event_packet_get_type(packet)) { 979 980 case L2CAP_EVENT_INCOMING_CONNECTION: 981 btstack_assert(avrcp_controller_packet_handler != NULL); 982 btstack_assert(avrcp_target_packet_handler != NULL); 983 984 l2cap_event_incoming_connection_get_address(packet, event_addr); 985 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 986 con_handle = l2cap_event_incoming_connection_get_handle(packet); 987 988 outoing_active = false; 989 connection_already_established = false; 990 991 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 992 if (connection_target != NULL){ 993 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 994 outoing_active = true; 995 connection_target->incoming_declined = true; 996 } 997 if (connection_target->state >= AVCTP_CONNECTION_OPENED){ 998 connection_already_established = true; 999 } 1000 } 1001 1002 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1003 if (connection_controller != NULL){ 1004 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 1005 outoing_active = true; 1006 connection_controller->incoming_declined = true; 1007 } 1008 if (connection_controller->state >= AVCTP_CONNECTION_OPENED){ 1009 connection_already_established = true; 1010 } 1011 } 1012 1013 decline_connection = outoing_active || connection_already_established; 1014 if (decline_connection == false){ 1015 uint16_t avrcp_cid; 1016 if ((connection_controller == NULL) || (connection_target == NULL)){ 1017 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1018 } else { 1019 avrcp_cid = connection_controller->avrcp_cid; 1020 } 1021 // create two connection objects (both) 1022 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 1023 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 1024 if ((connection_target == NULL) || (connection_controller == NULL)){ 1025 decline_connection = true; 1026 if (connection_target) { 1027 avrcp_finalize_connection(connection_target); 1028 } 1029 if (connection_controller) { 1030 avrcp_finalize_connection(connection_controller); 1031 } 1032 } 1033 } 1034 if (decline_connection){ 1035 log_info("Decline connection 0x%04x: outgoing active %u, connection already established: %u", local_cid, outoing_active, connection_already_established); 1036 l2cap_decline_connection(local_cid); 1037 } else { 1038 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%04x, state %d", local_cid, connection_controller->state); 1039 l2cap_accept_connection(local_cid); 1040 } 1041 break; 1042 1043 case L2CAP_EVENT_CHANNEL_OPENED: 1044 l2cap_event_channel_opened_get_address(packet, event_addr); 1045 status = l2cap_event_channel_opened_get_status(packet); 1046 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 1047 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 1048 con_handle = l2cap_event_channel_opened_get_handle(packet); 1049 1050 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1051 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 1052 1053 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 1054 // outgoing: structs are cteated in avrcp_connect() 1055 if ((connection_controller == NULL) || (connection_target == NULL)) { 1056 break; 1057 } 1058 1059 switch (status){ 1060 case ERROR_CODE_SUCCESS: 1061 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 1062 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 1063 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1064 return; 1065 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 1066 if (connection_controller->incoming_declined == true){ 1067 log_info("Incoming connection was declined, and the outgoing failed"); 1068 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1069 connection_controller->incoming_declined = false; 1070 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1071 connection_target->incoming_declined = false; 1072 avrcp_retry_timer_start(connection_controller); 1073 return; 1074 } 1075 break; 1076 default: 1077 break; 1078 } 1079 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 1080 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1081 avrcp_finalize_connection(connection_controller); 1082 avrcp_finalize_connection(connection_target); 1083 1084 break; 1085 1086 case L2CAP_EVENT_CHANNEL_CLOSED: 1087 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1088 1089 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1090 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1091 if ((connection_controller == NULL) || (connection_target == NULL)) { 1092 break; 1093 } 1094 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 1095 avrcp_finalize_connection(connection_controller); 1096 avrcp_finalize_connection(connection_target); 1097 break; 1098 1099 case L2CAP_EVENT_CAN_SEND_NOW: 1100 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 1101 can_send = true; 1102 1103 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1104 if ((connection_target != NULL) && connection_target->wait_to_send){ 1105 connection_target->wait_to_send = false; 1106 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1107 can_send = false; 1108 } 1109 1110 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1111 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 1112 if (can_send){ 1113 connection_controller->wait_to_send = false; 1114 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1115 } else { 1116 l2cap_request_can_send_now_event(local_cid); 1117 } 1118 } 1119 break; 1120 1121 default: 1122 break; 1123 } 1124 break; 1125 1126 case L2CAP_DATA_PACKET: 1127 switch (avrcp_get_frame_type(packet[0])){ 1128 case AVRCP_RESPONSE_FRAME: 1129 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1130 break; 1131 case AVRCP_COMMAND_FRAME: 1132 default: // make compiler happy 1133 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1134 break; 1135 } 1136 break; 1137 1138 default: 1139 break; 1140 } 1141 } 1142 1143 void avrcp_init(void){ 1144 avrcp_connections = NULL; 1145 if (avrcp_l2cap_service_registered) return; 1146 1147 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1148 if (status != ERROR_CODE_SUCCESS) return; 1149 avrcp_l2cap_service_registered = true; 1150 } 1151 1152 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1153 // note: called by avrcp_controller_init 1154 avrcp_controller_packet_handler = callback; 1155 } 1156 1157 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1158 // note: called by avrcp_target_init 1159 avrcp_target_packet_handler = callback; 1160 } 1161 1162 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1163 btstack_assert(callback != NULL); 1164 avrcp_callback = callback; 1165 } 1166 1167 void avrcp_register_browsing_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1168 btstack_assert(callback != NULL); 1169 avrcp_browsing_sdp_query_complete_handler = callback; 1170 } 1171 1172 #ifdef ENABLE_AVRCP_COVER_ART 1173 void avrcp_register_cover_art_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1174 btstack_assert(callback != NULL); 1175 avrcp_cover_art_sdp_query_complete_handler = callback; 1176 } 1177 #endif 1178 1179 void avrcp_trigger_sdp_query(avrcp_connection_t *connection_controller, avrcp_connection_t *connection_target) { 1180 connection_controller->trigger_sdp_query = true; 1181 connection_target->trigger_sdp_query = true; 1182 1183 avrcp_start_next_sdp_query(); 1184 } 1185 1186 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1187 btstack_assert(avrcp_controller_packet_handler != NULL); 1188 btstack_assert(avrcp_target_packet_handler != NULL); 1189 1190 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1191 bool setup_active = false; 1192 if (connection_controller){ 1193 // allow to call avrcp_connect after signaling connection was triggered remotely 1194 // @note this also allows to call avrcp_connect again before SLC is complete 1195 if (connection_controller->state < AVCTP_CONNECTION_OPENED){ 1196 setup_active = true; 1197 } else { 1198 return ERROR_CODE_COMMAND_DISALLOWED; 1199 } 1200 } 1201 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1202 if (connection_target){ 1203 if (connection_target->state < AVCTP_CONNECTION_OPENED){ 1204 setup_active = true; 1205 } else { 1206 return ERROR_CODE_COMMAND_DISALLOWED; 1207 } 1208 } 1209 if (setup_active){ 1210 return ERROR_CODE_SUCCESS; 1211 } 1212 1213 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1214 1215 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1216 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1217 1218 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1219 if (!connection_target){ 1220 avrcp_finalize_connection(connection_controller); 1221 return BTSTACK_MEMORY_ALLOC_FAILED; 1222 } 1223 1224 if (avrcp_cid != NULL){ 1225 *avrcp_cid = cid; 1226 } 1227 1228 connection_controller->avrcp_cid = cid; 1229 connection_target->avrcp_cid = cid; 1230 1231 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1232 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1233 1234 avrcp_trigger_sdp_query(connection_controller, connection_target); 1235 1236 return ERROR_CODE_SUCCESS; 1237 } 1238 1239 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1240 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1241 if (!connection_controller){ 1242 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1243 } 1244 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1245 if (!connection_target){ 1246 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1247 } 1248 if (connection_controller->browsing_connection){ 1249 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1250 } 1251 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1252 return ERROR_CODE_SUCCESS; 1253 } 1254 1255 void avrcp_deinit(void){ 1256 avrcp_l2cap_service_registered = false; 1257 1258 avrcp_cid_counter = 0; 1259 avrcp_connections = NULL; 1260 1261 avrcp_callback = NULL; 1262 avrcp_controller_packet_handler = NULL; 1263 avrcp_target_packet_handler = NULL; 1264 1265 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1266 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1267 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1268 } 1269 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1270 #define FUZZ_CID 0x44 1271 #define FUZZ_CON_HANDLE 0x0001 1272 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1273 void avrcp_init_fuzz(void){ 1274 // setup avrcp connections for cid 1275 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1276 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1277 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1278 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1279 } 1280 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1281 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1282 } 1283 #endif 1284