1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 // snprintf 43 #include <stdio.h> 44 45 #include "bluetooth_psm.h" 46 #include "bluetooth_sdp.h" 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "btstack_memory.h" 50 #include "classic/sdp_client.h" 51 #include "classic/sdp_util.h" 52 #include "classic/avrcp.h" 53 54 55 typedef struct { 56 uint8_t parse_sdp_record; 57 uint32_t record_id; 58 uint16_t avrcp_cid; 59 uint16_t avrcp_l2cap_psm; 60 uint16_t avrcp_version; 61 62 uint16_t browsing_l2cap_psm; 63 uint16_t browsing_version; 64 } avrcp_sdp_query_context_t; 65 66 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 static const char * avrcp_default_controller_service_name = "BTstack AVRCP Controller Service"; 69 static const char * avrcp_default_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 70 static const char * avrcp_defaul_target_service_name = "BTstack AVRCP Target Service"; 71 static const char * avrcp_default_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 72 73 static const char * avrcp_subunit_type_name[] = { 74 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 75 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 76 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 77 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 78 }; 79 80 // default subunit info: single PANEL subunit 81 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 82 83 // globals 84 static bool avrcp_l2cap_service_registered = false; 85 86 // connections 87 static uint16_t avrcp_cid_counter; 88 static btstack_linked_list_t avrcp_connections; 89 90 // higher layer callbacks 91 static btstack_packet_handler_t avrcp_callback; 92 static btstack_packet_handler_t avrcp_controller_packet_handler; 93 static btstack_packet_handler_t avrcp_target_packet_handler; 94 95 // sdp query 96 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 97 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 98 static uint8_t avrcp_sdp_query_attribute_value[45]; 99 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 100 101 102 const char * avrcp_subunit2str(uint16_t index){ 103 if (index <= 11) return avrcp_subunit_type_name[index]; 104 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 105 return avrcp_subunit_type_name[16]; 106 } 107 108 static const char * avrcp_event_name[] = { 109 "ERROR", "PLAYBACK_STATUS_CHANGED", 110 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 111 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 112 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 113 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 114 }; 115 const char * avrcp_event2str(uint16_t index){ 116 if (index <= 0x0d) return avrcp_event_name[index]; 117 return avrcp_event_name[0]; 118 } 119 120 static const char * avrcp_operation_name[] = { 121 "SKIP", NULL, NULL, NULL, NULL, 122 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 123 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 124 }; 125 126 const char * avrcp_operation2str(uint8_t operation_id){ 127 char * name = NULL; 128 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 129 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 130 } 131 if (name == NULL){ 132 static char buffer[13]; 133 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 134 buffer[sizeof(buffer)-1] = 0; 135 return buffer; 136 } else { 137 return name; 138 } 139 } 140 141 static const char * avrcp_media_attribute_id_name[] = { 142 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 143 }; 144 const char * avrcp_attribute2str(uint8_t index){ 145 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 146 return avrcp_media_attribute_id_name[0]; 147 } 148 149 static const char * avrcp_play_status_name[] = { 150 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 151 "ERROR" // 0xFF 152 }; 153 const char * avrcp_play_status2str(uint8_t index){ 154 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 155 return avrcp_play_status_name[5]; 156 } 157 158 static const char * avrcp_ctype_name[] = { 159 "CONTROL", 160 "STATUS", 161 "SPECIFIC_INQUIRY", 162 "NOTIFY", 163 "GENERAL_INQUIRY", 164 "RESERVED5", 165 "RESERVED6", 166 "RESERVED7", 167 "NOT IMPLEMENTED IN REMOTE", 168 "ACCEPTED BY REMOTE", 169 "REJECTED BY REMOTE", 170 "IN_TRANSITION", 171 "IMPLEMENTED_STABLE", 172 "CHANGED_STABLE", 173 "RESERVED", 174 "INTERIM" 175 }; 176 const char * avrcp_ctype2str(uint8_t index){ 177 if (index < sizeof(avrcp_ctype_name)){ 178 return avrcp_ctype_name[index]; 179 } 180 return "NONE"; 181 } 182 183 static const char * avrcp_shuffle_mode_name[] = { 184 "SHUFFLE OFF", 185 "SHUFFLE ALL TRACKS", 186 "SHUFFLE GROUP" 187 }; 188 189 const char * avrcp_shuffle2str(uint8_t index){ 190 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 191 return "NONE"; 192 } 193 194 static const char * avrcp_repeat_mode_name[] = { 195 "REPEAT OFF", 196 "REPEAT SINGLE TRACK", 197 "REPEAT ALL TRACKS", 198 "REPEAT GROUP" 199 }; 200 201 const char * avrcp_repeat2str(uint8_t index){ 202 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 203 return "NONE"; 204 } 205 206 btstack_linked_list_t avrcp_get_connections(void){ 207 return avrcp_connections; 208 } 209 210 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 211 uint8_t cmd_opcode_index = 5; 212 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 213 return packet[cmd_opcode_index]; 214 } 215 216 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 217 const char * service_name, const char * service_provider_name){ 218 uint8_t* attribute; 219 de_create_sequence(service); 220 221 // 0x0000 "Service Record Handle" 222 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 223 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 224 225 // 0x0001 "Service Class ID List" 226 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 227 attribute = de_push_sequence(service); 228 { 229 if (controller){ 230 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 231 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 232 } else { 233 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 234 } 235 } 236 de_pop_sequence(service, attribute); 237 238 // 0x0004 "Protocol Descriptor List" 239 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 240 attribute = de_push_sequence(service); 241 { 242 uint8_t* l2cpProtocol = de_push_sequence(attribute); 243 { 244 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 245 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 246 } 247 de_pop_sequence(attribute, l2cpProtocol); 248 249 uint8_t* avctpProtocol = de_push_sequence(attribute); 250 { 251 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 252 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 253 } 254 de_pop_sequence(attribute, avctpProtocol); 255 } 256 de_pop_sequence(service, attribute); 257 258 // 0x0005 "Public Browse Group" 259 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 260 attribute = de_push_sequence(service); 261 { 262 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 263 } 264 de_pop_sequence(service, attribute); 265 266 // 0x0009 "Bluetooth Profile Descriptor List" 267 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 268 attribute = de_push_sequence(service); 269 { 270 uint8_t *avrcProfile = de_push_sequence(attribute); 271 { 272 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 273 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 274 } 275 de_pop_sequence(attribute, avrcProfile); 276 } 277 de_pop_sequence(service, attribute); 278 279 // 0x000d "Additional Bluetooth Profile Descriptor List" 280 if (browsing){ 281 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 282 attribute = de_push_sequence(service); 283 { 284 uint8_t * des = de_push_sequence(attribute); 285 { 286 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 287 { 288 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 289 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 290 } 291 de_pop_sequence(des, browsing_l2cpProtocol); 292 293 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 294 { 295 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 296 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 297 } 298 de_pop_sequence(des, browsing_avctpProtocol); 299 } 300 de_pop_sequence(attribute, des); 301 } 302 de_pop_sequence(service, attribute); 303 } 304 305 306 // 0x0100 "Service Name" 307 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 308 if (service_name){ 309 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 310 } else { 311 if (controller){ 312 de_add_data(service, DE_STRING, strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 313 } else { 314 de_add_data(service, DE_STRING, strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 315 } 316 } 317 318 // 0x0100 "Provider Name" 319 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 320 if (service_provider_name){ 321 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 322 } else { 323 if (controller){ 324 de_add_data(service, DE_STRING, strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 325 } else { 326 de_add_data(service, DE_STRING, strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 327 } 328 } 329 330 // 0x0311 "Supported Features" 331 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 332 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 333 } 334 335 static uint16_t avctp_get_header_offset(avctp_packet_type_t avctp_packet_type) { 336 uint16_t offset; // AVCTP message: header (1), num_packets (1), pid (2) 337 switch (avctp_packet_type){ 338 case AVCTP_SINGLE_PACKET: 339 case AVCTP_START_PACKET: 340 offset = 4; 341 break; 342 default: 343 offset = 1; 344 break; 345 } 346 return offset; 347 } 348 349 static uint16_t avctp_get_message_offset(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 350 switch (avctp_packet_type){ 351 case AVCTP_SINGLE_PACKET: 352 case AVCTP_START_PACKET: 353 break; 354 default: 355 return 0; 356 } 357 358 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 359 switch (command_opcode){ 360 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 361 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 362 break; 363 case AVRCP_CMD_OPCODE_PASS_THROUGH: 364 offset += 3; // AVRCP message: operation id (1), param_len (2) 365 break; 366 default: 367 break; 368 } 369 return offset; 370 } 371 372 static uint16_t avctp_get_max_payload_size(uint16_t l2cap_cid, avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type){ 373 uint16_t max_frame_size = btstack_min(l2cap_get_remote_mtu_for_local_cid(l2cap_cid), AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 374 uint16_t offset = avctp_get_header_offset(avctp_packet_type) + avctp_get_message_offset(command_opcode, avctp_packet_type); 375 376 btstack_assert( max_frame_size >= offset); 377 return (max_frame_size - offset); 378 } 379 380 381 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 382 if (connection->data_offset == 0){ 383 *max_payload_size = avctp_get_max_payload_size(connection->l2cap_signaling_cid, connection->command_opcode, AVCTP_SINGLE_PACKET); 384 if (*max_payload_size >= connection->data_len){ 385 return AVCTP_SINGLE_PACKET; 386 } else { 387 return AVCTP_START_PACKET; 388 } 389 } else { 390 *max_payload_size = avctp_get_max_payload_size(connection->l2cap_signaling_cid, connection->command_opcode, AVCTP_CONTINUE_PACKET); 391 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 392 return AVCTP_CONTINUE_PACKET; 393 } else { 394 return AVCTP_END_PACKET; 395 } 396 } 397 } 398 399 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 400 btstack_linked_list_iterator_t it; 401 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 402 while (btstack_linked_list_iterator_has_next(&it)){ 403 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 404 if (connection->role != role) continue; 405 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 406 return connection; 407 } 408 return NULL; 409 } 410 411 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 412 btstack_linked_list_iterator_t it; 413 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 414 while (btstack_linked_list_iterator_has_next(&it)){ 415 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 416 if (connection->role != role) continue; 417 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 418 return connection; 419 } 420 return NULL; 421 } 422 423 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 424 btstack_linked_list_iterator_t it; 425 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 426 while (btstack_linked_list_iterator_has_next(&it)){ 427 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 428 if (connection->role != role) continue; 429 if (connection->avrcp_cid != avrcp_cid) continue; 430 return connection; 431 } 432 return NULL; 433 } 434 435 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 436 btstack_linked_list_iterator_t it; 437 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 438 while (btstack_linked_list_iterator_has_next(&it)){ 439 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 440 if (connection->role != role) continue; 441 if (connection->avrcp_browsing_cid != browsing_cid) continue; 442 return connection; 443 } 444 return NULL; 445 } 446 447 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 448 btstack_linked_list_iterator_t it; 449 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 450 while (btstack_linked_list_iterator_has_next(&it)){ 451 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 452 if (connection->role != role) continue; 453 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 454 return connection; 455 } 456 return NULL; 457 } 458 459 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 460 btstack_linked_list_iterator_t it; 461 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 462 while (btstack_linked_list_iterator_has_next(&it)){ 463 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 464 if (connection->role != role) continue; 465 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 466 return connection->browsing_connection; 467 } 468 return NULL; 469 } 470 471 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 472 connection->wait_to_send = true; 473 l2cap_request_can_send_now_event(l2cap_cid); 474 } 475 476 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 477 do { 478 if (avrcp_cid_counter == 0xffff) { 479 avrcp_cid_counter = 1; 480 } else { 481 avrcp_cid_counter++; 482 } 483 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 484 return avrcp_cid_counter; 485 } 486 487 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 488 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 489 if (!connection){ 490 log_error("Not enough memory to create connection for role %d", role); 491 return NULL; 492 } 493 494 connection->state = AVCTP_CONNECTION_IDLE; 495 connection->role = role; 496 497 connection->transaction_id = 0xFF; 498 connection->transaction_id_counter = 0; 499 500 connection->max_num_fragments = 0xFF; 501 502 // setup default unit / subunit info 503 connection->company_id = 0xffffff; 504 connection->unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 505 connection->subunit_info_data_size = sizeof(avrcp_default_subunit_info); 506 connection->subunit_info_data = avrcp_default_subunit_info; 507 508 log_info("avrcp_create_connection, role %d", role); 509 (void)memcpy(connection->remote_addr, remote_addr, 6); 510 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 511 return connection; 512 } 513 514 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 515 btstack_run_loop_remove_timer(&connection->retry_timer); 516 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 517 btstack_memory_avrcp_connection_free(connection); 518 } 519 520 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 521 btstack_assert(avrcp_callback != NULL); 522 523 uint8_t event[14]; 524 int pos = 0; 525 event[pos++] = HCI_EVENT_AVRCP_META; 526 event[pos++] = sizeof(event) - 2; 527 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 528 event[pos++] = status; 529 little_endian_store_16(event, pos, avrcp_cid); 530 pos += 2; 531 reverse_bd_addr(addr,&event[pos]); 532 pos += 6; 533 little_endian_store_16(event, pos, con_handle); 534 pos += 2; 535 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 536 } 537 538 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 539 btstack_assert(avrcp_callback != NULL); 540 541 uint8_t event[5]; 542 int pos = 0; 543 event[pos++] = HCI_EVENT_AVRCP_META; 544 event[pos++] = sizeof(event) - 2; 545 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 546 little_endian_store_16(event, pos, avrcp_cid); 547 pos += 2; 548 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 549 } 550 551 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 552 return avrcp_sdp_query_context.browsing_l2cap_psm; 553 } 554 555 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 556 des_iterator_t des_list_it; 557 des_iterator_t prot_it; 558 559 // Handle new SDP record 560 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 561 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 562 avrcp_sdp_query_context.parse_sdp_record = 0; 563 // log_info("SDP Record: Nr: %d", record_id); 564 } 565 566 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 567 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 568 569 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 570 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 571 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 572 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 573 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)) { 574 uint8_t * element = des_iterator_get_element(&des_list_it); 575 if (de_get_element_type(element) != DE_UUID) continue; 576 uint32_t uuid = de_get_uuid32(element); 577 switch (uuid){ 578 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 579 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 580 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 581 avrcp_sdp_query_context.parse_sdp_record = 1; 582 break; 583 default: 584 break; 585 } 586 } 587 break; 588 589 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 590 if (!avrcp_sdp_query_context.parse_sdp_record) break; 591 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 592 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)) { 593 uint8_t *des_element; 594 uint8_t *element; 595 uint32_t uuid; 596 597 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 598 599 des_element = des_iterator_get_element(&des_list_it); 600 des_iterator_init(&prot_it, des_element); 601 element = des_iterator_get_element(&prot_it); 602 603 if (de_get_element_type(element) != DE_UUID) continue; 604 605 uuid = de_get_uuid32(element); 606 des_iterator_next(&prot_it); 607 switch (uuid){ 608 case BLUETOOTH_PROTOCOL_L2CAP: 609 if (!des_iterator_has_more(&prot_it)) continue; 610 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 611 break; 612 case BLUETOOTH_PROTOCOL_AVCTP: 613 if (!des_iterator_has_more(&prot_it)) continue; 614 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 615 break; 616 default: 617 break; 618 } 619 } 620 } 621 break; 622 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 623 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 624 if (!avrcp_sdp_query_context.parse_sdp_record) break; 625 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 626 627 des_iterator_t des_list_0_it; 628 uint8_t *element_0; 629 630 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 631 element_0 = des_iterator_get_element(&des_list_0_it); 632 633 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 634 uint8_t *des_element; 635 uint8_t *element; 636 uint32_t uuid; 637 638 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 639 640 des_element = des_iterator_get_element(&des_list_it); 641 des_iterator_init(&prot_it, des_element); 642 element = des_iterator_get_element(&prot_it); 643 644 if (de_get_element_type(element) != DE_UUID) continue; 645 646 uuid = de_get_uuid32(element); 647 des_iterator_next(&prot_it); 648 switch (uuid){ 649 case BLUETOOTH_PROTOCOL_L2CAP: 650 if (!des_iterator_has_more(&prot_it)) continue; 651 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 652 break; 653 case BLUETOOTH_PROTOCOL_AVCTP: 654 if (!des_iterator_has_more(&prot_it)) continue; 655 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 656 break; 657 default: 658 break; 659 } 660 } 661 } 662 break; 663 default: 664 break; 665 } 666 } 667 } else { 668 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)); 669 } 670 } 671 672 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 673 if (connection == NULL) return; 674 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 675 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 676 avrcp_finalize_connection(connection); 677 } 678 679 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection){ 680 if (connection == NULL) return; 681 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 682 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 683 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 684 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 685 } 686 687 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 688 UNUSED(packet_type); 689 UNUSED(channel); 690 UNUSED(size); 691 692 bool state_ok = true; 693 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 694 if (!avrcp_target_connection || avrcp_target_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 695 state_ok = false; 696 } 697 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 698 if (!avrcp_controller_connection || avrcp_controller_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 699 state_ok = false; 700 } 701 if (!state_ok){ 702 // something wrong, nevertheless, start next sdp query if this one is complete 703 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 704 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 705 } 706 return; 707 } 708 709 uint8_t status; 710 711 switch (hci_event_packet_get_type(packet)){ 712 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 713 avrcp_handle_sdp_client_query_attribute_value(packet); 714 return; 715 716 case SDP_EVENT_QUERY_COMPLETE: 717 status = sdp_event_query_complete_get_status(packet); 718 719 if (status != ERROR_CODE_SUCCESS){ 720 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 721 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 722 break; 723 } 724 725 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 726 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 727 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 728 break; 729 } 730 731 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection); 732 avrcp_handle_sdp_query_succeeded(avrcp_target_connection); 733 734 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 735 break; 736 737 default: 738 return; 739 } 740 741 // register the SDP Query request to check if there is another connection waiting for the query 742 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 743 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 744 } 745 746 747 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){ 748 if (connection == NULL){ 749 connection = avrcp_create_connection(role, event_addr); 750 } 751 if (connection) { 752 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 753 connection->l2cap_signaling_cid = local_cid; 754 connection->avrcp_cid = avrcp_cid; 755 connection->con_handle = con_handle; 756 btstack_run_loop_remove_timer(&connection->retry_timer); 757 } 758 return connection; 759 } 760 761 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 762 connection->l2cap_signaling_cid = local_cid; 763 connection->l2cap_mtu = l2cap_mtu; 764 connection->con_handle = con_handle; 765 connection->incoming_declined = false; 766 connection->song_length_ms = 0xFFFFFFFF; 767 connection->song_position_ms = 0xFFFFFFFF; 768 connection->playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 769 connection->state = AVCTP_CONNECTION_OPENED; 770 771 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); 772 } 773 774 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 775 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 776 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 777 if (connection_controller == NULL) return; 778 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 779 if (connection_target == NULL) return; 780 781 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 782 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 783 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 784 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 785 } 786 } 787 788 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 789 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 790 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 791 792 // add some jitter/randomness to reconnect delay 793 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 794 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 795 796 btstack_run_loop_add_timer(&connection->retry_timer); 797 } 798 799 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 800 return (avrcp_frame_type_t)((header & 0x02) >> 1); 801 } 802 803 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 804 UNUSED(channel); 805 UNUSED(size); 806 bd_addr_t event_addr; 807 uint16_t local_cid; 808 uint16_t l2cap_mtu; 809 uint8_t status; 810 bool decline_connection; 811 bool outoing_active; 812 hci_con_handle_t con_handle; 813 814 avrcp_connection_t * connection_controller; 815 avrcp_connection_t * connection_target; 816 bool can_send; 817 818 switch (packet_type) { 819 case HCI_EVENT_PACKET: 820 switch (hci_event_packet_get_type(packet)) { 821 822 case L2CAP_EVENT_INCOMING_CONNECTION: 823 btstack_assert(avrcp_controller_packet_handler != NULL); 824 btstack_assert(avrcp_target_packet_handler != NULL); 825 826 l2cap_event_incoming_connection_get_address(packet, event_addr); 827 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 828 con_handle = l2cap_event_incoming_connection_get_handle(packet); 829 830 outoing_active = false; 831 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 832 if (connection_target != NULL){ 833 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 834 outoing_active = true; 835 connection_target->incoming_declined = true; 836 } 837 } 838 839 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 840 if (connection_controller != NULL){ 841 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 842 outoing_active = true; 843 connection_controller->incoming_declined = true; 844 } 845 } 846 847 decline_connection = outoing_active; 848 if (decline_connection == false){ 849 uint16_t avrcp_cid; 850 if ((connection_controller == NULL) || (connection_target == NULL)){ 851 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 852 } else { 853 avrcp_cid = connection_controller->avrcp_cid; 854 } 855 // create two connection objects (both) 856 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 857 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 858 if ((connection_target == NULL) || (connection_controller == NULL)){ 859 decline_connection = true; 860 if (connection_target) { 861 avrcp_finalize_connection(connection_target); 862 } 863 if (connection_controller) { 864 avrcp_finalize_connection(connection_controller); 865 } 866 } 867 } 868 if (decline_connection){ 869 l2cap_decline_connection(local_cid); 870 } else { 871 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 872 l2cap_accept_connection(local_cid); 873 } 874 break; 875 876 case L2CAP_EVENT_CHANNEL_OPENED: 877 l2cap_event_channel_opened_get_address(packet, event_addr); 878 status = l2cap_event_channel_opened_get_status(packet); 879 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 880 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 881 con_handle = l2cap_event_channel_opened_get_handle(packet); 882 883 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 884 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 885 886 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 887 // outgoing: structs are cteated in avrcp_connect() 888 if ((connection_controller == NULL) || (connection_target == NULL)) { 889 break; 890 } 891 892 switch (status){ 893 case ERROR_CODE_SUCCESS: 894 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 895 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 896 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 897 return; 898 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 899 if (connection_controller->incoming_declined == true){ 900 log_info("Incoming connection was declined, and the outgoing failed"); 901 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 902 connection_controller->incoming_declined = false; 903 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 904 connection_target->incoming_declined = false; 905 avrcp_retry_timer_start(connection_controller); 906 return; 907 } 908 break; 909 default: 910 break; 911 } 912 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 913 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 914 avrcp_finalize_connection(connection_controller); 915 avrcp_finalize_connection(connection_target); 916 917 break; 918 919 case L2CAP_EVENT_CHANNEL_CLOSED: 920 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 921 922 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 923 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 924 if ((connection_controller == NULL) || (connection_target == NULL)) { 925 break; 926 } 927 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 928 avrcp_finalize_connection(connection_controller); 929 avrcp_finalize_connection(connection_target); 930 break; 931 932 case L2CAP_EVENT_CAN_SEND_NOW: 933 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 934 can_send = true; 935 936 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 937 if ((connection_target != NULL) && connection_target->wait_to_send){ 938 connection_target->wait_to_send = false; 939 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 940 can_send = false; 941 } 942 943 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 944 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 945 if (can_send){ 946 connection_controller->wait_to_send = false; 947 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 948 } else { 949 l2cap_request_can_send_now_event(local_cid); 950 } 951 } 952 break; 953 954 default: 955 break; 956 } 957 break; 958 959 case L2CAP_DATA_PACKET: 960 switch (avrcp_get_frame_type(packet[0])){ 961 case AVRCP_RESPONSE_FRAME: 962 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 963 break; 964 case AVRCP_COMMAND_FRAME: 965 default: // make compiler happy 966 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 967 break; 968 } 969 break; 970 971 default: 972 break; 973 } 974 } 975 976 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 977 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 978 if (!connection_controller){ 979 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 980 } 981 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 982 if (!connection_target){ 983 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 984 } 985 if (connection_controller->browsing_connection){ 986 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 987 } 988 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 989 return ERROR_CODE_SUCCESS; 990 } 991 992 static void avrcp_handle_start_sdp_client_query(void * context){ 993 UNUSED(context); 994 995 btstack_linked_list_iterator_t it; 996 btstack_linked_list_iterator_init(&it, &avrcp_connections); 997 while (btstack_linked_list_iterator_has_next(&it)){ 998 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 999 1000 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 1001 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1002 1003 // prevent triggering SDP query twice (for each role once) 1004 avrcp_connection_t * connection_with_opposite_role; 1005 switch (connection->role){ 1006 case AVRCP_CONTROLLER: 1007 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 1008 break; 1009 case AVRCP_TARGET: 1010 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 1011 break; 1012 default: 1013 btstack_assert(false); 1014 return; 1015 } 1016 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1017 1018 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 1019 avrcp_sdp_query_context.avrcp_version = 0; 1020 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 1021 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 1022 return; 1023 } 1024 } 1025 1026 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1027 btstack_assert(avrcp_controller_packet_handler != NULL); 1028 btstack_assert(avrcp_target_packet_handler != NULL); 1029 1030 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1031 if (connection_controller){ 1032 return ERROR_CODE_COMMAND_DISALLOWED; 1033 } 1034 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1035 if (connection_target){ 1036 return ERROR_CODE_COMMAND_DISALLOWED; 1037 } 1038 1039 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1040 1041 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1042 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1043 1044 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1045 if (!connection_target){ 1046 avrcp_finalize_connection(connection_controller); 1047 return BTSTACK_MEMORY_ALLOC_FAILED; 1048 } 1049 1050 if (avrcp_cid != NULL){ 1051 *avrcp_cid = cid; 1052 } 1053 1054 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1055 connection_controller->avrcp_cid = cid; 1056 1057 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1058 connection_target->avrcp_cid = cid; 1059 1060 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1061 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1062 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1063 return ERROR_CODE_SUCCESS; 1064 } 1065 1066 void avrcp_init(void){ 1067 avrcp_connections = NULL; 1068 if (avrcp_l2cap_service_registered) return; 1069 1070 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1071 if (status != ERROR_CODE_SUCCESS) return; 1072 avrcp_l2cap_service_registered = true; 1073 } 1074 1075 void avrcp_deinit(void){ 1076 avrcp_l2cap_service_registered = false; 1077 1078 avrcp_cid_counter = 0; 1079 avrcp_connections = NULL; 1080 1081 avrcp_callback = NULL; 1082 avrcp_controller_packet_handler = NULL; 1083 avrcp_target_packet_handler = NULL; 1084 1085 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1086 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1087 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1088 } 1089 1090 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1091 avrcp_controller_packet_handler = callback; 1092 } 1093 1094 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1095 avrcp_target_packet_handler = callback; 1096 } 1097 1098 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1099 btstack_assert(callback != NULL); 1100 avrcp_callback = callback; 1101 } 1102 1103 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1104 #define FUZZ_CID 0x44 1105 #define FUZZ_CON_HANDLE 0x0001 1106 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1107 void avrcp_init_fuzz(void){ 1108 // setup avrcp connections for cid 1109 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1110 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1111 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1112 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1113 } 1114 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1115 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1116 } 1117 #endif