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_browsing_target.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 #include <inttypes.h> 43 #include "classic/avrcp.h" 44 #include "classic/avrcp_browsing.h" 45 #include "classic/avrcp_browsing_target.h" 46 #include "classic/avrcp_target.h" 47 #include "classic/avrcp_controller.h" 48 49 #include "bluetooth_sdp.h" 50 #include "btstack_debug.h" 51 #include "btstack_event.h" 52 53 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 54 55 static int avrcp_browsing_target_handle_can_send_now(avrcp_browsing_connection_t * connection){ 56 int pos = 0; 57 58 // l2cap_reserve_packet_buffer(); 59 // uint8_t * packet = l2cap_get_outgoing_buffer(); 60 uint8_t packet[400]; 61 connection->packet_type = AVRCP_SINGLE_PACKET; 62 63 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 64 // Profile IDentifier (PID) 65 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 66 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 67 (void)memcpy(packet + pos, connection->cmd_operands, 68 connection->cmd_operands_length); 69 70 pos += connection->cmd_operands_length; 71 connection->wait_to_send = false; 72 // return l2cap_send_prepared(connection->l2cap_browsing_cid, pos); 73 return l2cap_send(connection->l2cap_browsing_cid, packet, pos); 74 } 75 76 77 static uint8_t avrcp_browsing_target_response_general_reject(avrcp_browsing_connection_t * connection, avrcp_status_code_t status){ 78 // AVRCP_CTYPE_RESPONSE_REJECTED 79 int pos = 0; 80 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 81 // connection->message_body[pos++] = 0; 82 // param length 83 big_endian_store_16(connection->cmd_operands, pos, 1); 84 pos += 2; 85 connection->cmd_operands[pos++] = status; 86 connection->cmd_operands_length = 4; 87 connection->state = AVCTP_W2_SEND_RESPONSE; 88 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 89 return ERROR_CODE_SUCCESS; 90 } 91 92 static void avrcp_browsing_target_emit_get_folder_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 93 btstack_assert(callback != NULL); 94 95 uint8_t event[18]; 96 int pos = 0; 97 event[pos++] = HCI_EVENT_AVRCP_META; 98 event[pos++] = sizeof(event) - 2; 99 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_FOLDER_ITEMS; 100 little_endian_store_16(event, pos, browsing_cid); 101 pos += 2; 102 event[pos++] = connection->scope; 103 big_endian_store_32(event, pos, connection->start_item); 104 pos += 4; 105 big_endian_store_32(event, pos, connection->end_item); 106 pos += 4; 107 big_endian_store_32(event, pos, connection->attr_bitmap); 108 pos += 4; 109 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 110 } 111 112 static void avrcp_browsing_target_emit_get_total_num_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 113 btstack_assert(callback != NULL); 114 115 uint8_t event[10]; 116 int pos = 0; 117 event[pos++] = HCI_EVENT_AVRCP_META; 118 event[pos++] = sizeof(event) - 2; 119 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_TOTAL_NUM_ITEMS; 120 little_endian_store_16(event, pos, browsing_cid); 121 pos += 2; 122 event[pos++] = connection->scope; 123 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 124 } 125 126 static void avrcp_browsing_target_emit_set_browsed_player(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t browsed_player_id){ 127 btstack_assert(callback != NULL); 128 129 uint8_t event[10]; 130 int pos = 0; 131 event[pos++] = HCI_EVENT_AVRCP_META; 132 event[pos++] = sizeof(event) - 2; 133 event[pos++] = AVRCP_SUBEVENT_BROWSING_SET_BROWSED_PLAYER; 134 little_endian_store_16(event, pos, browsing_cid); 135 pos += 2; 136 little_endian_store_16(event, pos, browsed_player_id); 137 pos += 2; 138 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 139 } 140 141 static void avrcp_browsing_target_emit_change_path(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t uid_counter, avrcp_browsing_direction_t direction, uint8_t * item_id){ 142 btstack_assert(callback != NULL); 143 144 uint8_t event[19]; 145 int pos = 0; 146 event[pos++] = HCI_EVENT_AVRCP_META; 147 event[pos++] = sizeof(event) - 2; 148 event[pos++] = AVRCP_SUBEVENT_BROWSING_CHANGE_PATH; 149 little_endian_store_16(event, pos, browsing_cid); 150 pos += 2; 151 little_endian_store_16(event, pos, uid_counter); 152 pos += 2; 153 event[pos++] = direction; 154 memcpy(&event[pos], item_id, 8); 155 pos += 8; 156 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 157 } 158 159 160 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 161 UNUSED(size); 162 avrcp_browsing_connection_t * browsing_connection; 163 avrcp_browsing_direction_t direction; 164 uint16_t uid_counter; 165 uint8_t * item_id; 166 167 switch (packet_type) { 168 case L2CAP_DATA_PACKET:{ 169 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 170 if (!browsing_connection) break; 171 int pos = 0; 172 uint8_t transport_header = packet[pos++]; 173 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 174 browsing_connection->transaction_label = transport_header >> 4; 175 avctp_packet_type_t avctp_packet_type = (avctp_packet_type_t)((transport_header & 0x0F) >> 2); 176 switch (avctp_packet_type){ 177 case AVCTP_SINGLE_PACKET: 178 case AVCTP_START_PACKET: 179 browsing_connection->subunit_type = packet[pos++] >> 2; 180 browsing_connection->subunit_id = 0; 181 browsing_connection->command_opcode = packet[pos++]; 182 browsing_connection->num_packets = 1; 183 if (avctp_packet_type == AVCTP_START_PACKET){ 184 browsing_connection->num_packets = packet[pos++]; 185 } 186 browsing_connection->pdu_id = packet[pos++]; 187 uint16_t parameter_length = big_endian_read_16(packet, pos); 188 pos += 2; 189 190 switch(browsing_connection->pdu_id){ 191 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 192 if (parameter_length < 10){ 193 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 194 break; 195 } 196 197 browsing_connection->scope = packet[pos++]; 198 browsing_connection->start_item = big_endian_read_32(packet, pos); 199 pos += 4; 200 browsing_connection->end_item = big_endian_read_32(packet, pos); 201 pos += 4; 202 uint8_t attr_count = packet[pos++]; 203 browsing_connection->attr_bitmap = 0; 204 205 while (attr_count){ 206 uint32_t attr_id = big_endian_read_32(packet, pos); 207 pos += 4; 208 browsing_connection->attr_bitmap |= (1 << attr_id); 209 attr_count--; 210 } 211 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 212 break; 213 214 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 215 // send total num items 216 if (parameter_length != 1){ 217 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_SCOPE); 218 break; 219 } 220 221 browsing_connection->scope = packet[pos++]; 222 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 223 break; 224 } 225 case AVRCP_PDU_ID_SET_BROWSED_PLAYER: 226 // player_id (2) 227 if (parameter_length != 2){ 228 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 229 break; 230 } 231 if ( (pos + 2) > size ){ 232 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_PLAYER_ID); 233 break; 234 } 235 avrcp_browsing_target_emit_set_browsed_player(avrcp_target_context.browsing_avrcp_callback, channel, big_endian_read_16(packet, pos)); 236 break; 237 238 case AVRCP_PDU_ID_CHANGE_PATH: 239 // one level up or down in the virtual filesystem 240 if (parameter_length != 11){ 241 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 242 break; 243 } 244 uid_counter = big_endian_read_16(packet, pos); 245 pos += 2; 246 direction = (avrcp_browsing_direction_t)packet[pos++]; 247 248 if (direction > AVRCP_BROWSING_DIRECTION_FOLDER_RFU){ 249 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_DIRECTION); 250 break; 251 } 252 item_id = &packet[pos]; 253 avrcp_browsing_target_emit_change_path(avrcp_target_context.browsing_avrcp_callback, channel, uid_counter, direction, item_id); 254 break; 255 256 default: 257 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 258 log_info("not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 259 break; 260 } 261 browsing_connection->state = AVCTP_CONNECTION_OPENED; 262 break; 263 264 default: 265 break; 266 } 267 break; 268 } 269 270 case HCI_EVENT_PACKET: 271 switch (hci_event_packet_get_type(packet)){ 272 case L2CAP_EVENT_CAN_SEND_NOW: 273 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 274 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 275 browsing_connection->state = AVCTP_CONNECTION_OPENED; 276 avrcp_browsing_target_handle_can_send_now(browsing_connection); 277 break; 278 default: 279 break; 280 } 281 break; 282 283 default: 284 break; 285 } 286 } 287 288 void avrcp_browsing_target_init(void){ 289 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 290 avrcp_browsing_register_target_packet_handler(avrcp_browsing_target_packet_handler); 291 } 292 293 void avrcp_browsing_target_deinit(void){ 294 avrcp_controller_context.browsing_packet_handler = NULL; 295 } 296 297 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 298 btstack_assert(callback != NULL); 299 avrcp_target_context.browsing_avrcp_callback = callback; 300 } 301 302 uint8_t avrcp_browsing_target_send_get_folder_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint8_t * attr_list, uint16_t attr_list_size, uint16_t num_items){ 303 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 304 if (!avrcp_connection){ 305 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 306 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 307 } 308 309 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 310 if (!connection){ 311 log_info("Could not find a browsing connection."); 312 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 313 } 314 if (connection->state != AVCTP_CONNECTION_OPENED){ 315 return ERROR_CODE_COMMAND_DISALLOWED; 316 } 317 318 // TODO: handle response to SetAddressedPlayer 319 320 uint16_t pos = 0; 321 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 322 uint8_t param_length = 5; 323 uint8_t param_length_pos = pos; 324 pos += 2; 325 326 avrcp_status_code_t status = AVRCP_STATUS_SUCCESS; 327 uint8_t status_pos = pos; 328 pos++; 329 330 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 331 pos += 2; 332 333 // TODO: fragmentation 334 if (attr_list_size > sizeof(connection->cmd_operands)){ 335 connection->attr_list = attr_list; 336 connection->attr_list_size = attr_list_size; 337 log_info(" todo: list too big, invoke fragmentation"); 338 return 1; 339 } 340 341 uint16_t items_byte_len = 0; 342 if (connection->start_item < num_items) { 343 if (connection->end_item < num_items) { 344 items_byte_len = connection->end_item - connection->start_item + 1; 345 } else { 346 items_byte_len = num_items - connection->start_item; 347 } 348 349 } else { 350 big_endian_store_16(connection->cmd_operands, pos, 0); 351 pos += 2; 352 } 353 big_endian_store_16(connection->cmd_operands, pos, items_byte_len); 354 pos += 2; 355 param_length += items_byte_len; 356 357 if (items_byte_len > 0){ 358 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 359 pos += attr_list_size; 360 } else { 361 status = AVRCP_STATUS_RANGE_OUT_OF_BOUNDS; 362 } 363 364 big_endian_store_16(connection->cmd_operands, param_length_pos, param_length); 365 connection->cmd_operands[status_pos] = status; 366 367 btstack_assert(pos <= 400); 368 connection->cmd_operands_length = pos; 369 370 connection->state = AVCTP_W2_SEND_RESPONSE; 371 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 372 return ERROR_CODE_SUCCESS; 373 } 374 375 uint8_t avrcp_browsing_target_send_change_path_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, avrcp_status_code_t status, uint32_t num_items){ 376 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 377 if (!avrcp_connection){ 378 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 379 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 380 } 381 382 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 383 if (!connection){ 384 log_info("Could not find a browsing connection."); 385 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 386 } 387 if (connection->state != AVCTP_CONNECTION_OPENED){ 388 return ERROR_CODE_COMMAND_DISALLOWED; 389 } 390 391 uint16_t pos = 0; 392 connection->cmd_operands[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 393 // Param length 394 big_endian_store_16(connection->cmd_operands, pos, 5); 395 pos += 2; 396 connection->cmd_operands[pos++] = status; 397 big_endian_store_32(connection->cmd_operands, pos, num_items); 398 399 connection->state = AVCTP_W2_SEND_RESPONSE; 400 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 401 return ERROR_CODE_SUCCESS; 402 } 403 404 uint8_t avrcp_browsing_target_send_accept_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint16_t browsed_player_id, uint8_t * response, uint16_t response_size){ 405 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 406 if (!avrcp_connection){ 407 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 408 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 409 } 410 411 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 412 if (!connection){ 413 log_info("Could not find a browsing connection."); 414 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 415 } 416 417 if (connection->state != AVCTP_CONNECTION_OPENED) { 418 log_info("Browsing connection wrong state."); 419 return ERROR_CODE_COMMAND_DISALLOWED; 420 } 421 422 connection->browsed_player_id = browsed_player_id; 423 424 uint16_t pos = 0; 425 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 426 big_endian_store_16(connection->cmd_operands, pos, response_size + 2 + 1); // uuid counter + status 427 pos += 2; 428 429 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 430 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 431 pos += 2; 432 433 // TODO: fragmentation 434 if (response_size > sizeof(connection->cmd_operands)){ 435 connection->attr_list = response; 436 connection->attr_list_size = response_size; 437 log_info(" todo: list too big, invoke fragmentation"); 438 return 1; 439 } 440 441 (void)memcpy(&connection->cmd_operands[pos], response, response_size); 442 pos += response_size; 443 btstack_assert(pos <= 255); 444 connection->cmd_operands_length = (uint8_t) pos; 445 446 connection->state = AVCTP_W2_SEND_RESPONSE; 447 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 448 return ERROR_CODE_SUCCESS; 449 } 450 451 uint8_t avrcp_browsing_target_send_reject_set_browsed_player(uint16_t avrcp_browsing_cid, avrcp_status_code_t status){ 452 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 453 if (!avrcp_connection){ 454 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 455 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 456 } 457 458 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 459 if (!connection){ 460 log_info("Could not find a browsing connection."); 461 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 462 } 463 464 if (connection->state != AVCTP_CONNECTION_OPENED) { 465 log_info("Browsing connection wrong state."); 466 return ERROR_CODE_COMMAND_DISALLOWED; 467 } 468 469 int pos = 0; 470 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 471 big_endian_store_16(connection->cmd_operands, pos, 1); 472 pos += 2; 473 connection->cmd_operands[pos++] = status; 474 connection->cmd_operands_length = pos; 475 476 connection->state = AVCTP_W2_SEND_RESPONSE; 477 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 478 return ERROR_CODE_SUCCESS; 479 } 480 481 uint8_t avrcp_browsing_target_send_get_total_num_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint32_t total_num_items){ 482 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 483 if (!avrcp_connection){ 484 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 485 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 486 } 487 488 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 489 if (!connection){ 490 log_info("Could not find a browsing connection."); 491 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 492 } 493 494 if (connection->state != AVCTP_CONNECTION_OPENED) { 495 log_info("Browsing connection wrong state."); 496 return ERROR_CODE_COMMAND_DISALLOWED; 497 } 498 499 int pos = 0; 500 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 501 big_endian_store_16(connection->cmd_operands, pos, 7); 502 pos += 2; 503 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 504 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 505 pos += 2; 506 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 507 pos += 4; 508 connection->cmd_operands_length = pos; 509 510 connection->state = AVCTP_W2_SEND_RESPONSE; 511 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 512 return ERROR_CODE_SUCCESS; 513 } 514 515