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 static void avrcp_browsing_target_emit_get_item_attributes(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t uid_counter, uint8_t scope, uint8_t * item_id, uint8_t attr_num, uint8_t * attr_list){ 160 btstack_assert(callback != NULL); 161 btstack_assert(attr_num <= AVRCP_MEDIA_ATTR_NUM); 162 163 uint8_t event[19 + 4 * AVRCP_MEDIA_ATTR_NUM]; 164 int pos = 0; 165 event[pos++] = HCI_EVENT_AVRCP_META; 166 event[pos++] = sizeof(event) - 2; 167 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_ITEM_ATTRIBUTES; 168 little_endian_store_16(event, pos, browsing_cid); 169 pos += 2; 170 little_endian_store_16(event, pos, uid_counter); 171 pos += 2; 172 event[pos++] = scope; 173 memcpy(&event[pos], item_id, 8); 174 pos += 8; 175 uint16_t attr_len = attr_num * 4; 176 little_endian_store_16(event, pos, attr_len); 177 pos += 2; 178 179 memcpy(&event[pos], attr_list, attr_len); 180 pos += attr_len; 181 (*callback)(HCI_EVENT_PACKET, 0, event, pos); 182 } 183 184 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 185 UNUSED(size); 186 avrcp_browsing_connection_t * browsing_connection; 187 avrcp_browsing_direction_t direction; 188 uint16_t uid_counter; 189 uint8_t * item_id; 190 191 switch (packet_type) { 192 case L2CAP_DATA_PACKET:{ 193 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 194 if (!browsing_connection) break; 195 int pos = 0; 196 uint8_t transport_header = packet[pos++]; 197 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 198 browsing_connection->transaction_label = transport_header >> 4; 199 avctp_packet_type_t avctp_packet_type = (avctp_packet_type_t)((transport_header & 0x0F) >> 2); 200 switch (avctp_packet_type){ 201 case AVCTP_SINGLE_PACKET: 202 case AVCTP_START_PACKET: 203 browsing_connection->subunit_type = packet[pos++] >> 2; 204 browsing_connection->subunit_id = 0; 205 browsing_connection->command_opcode = packet[pos++]; 206 browsing_connection->num_packets = 1; 207 if (avctp_packet_type == AVCTP_START_PACKET){ 208 browsing_connection->num_packets = packet[pos++]; 209 } 210 browsing_connection->pdu_id = packet[pos++]; 211 uint16_t parameter_length = big_endian_read_16(packet, pos); 212 pos += 2; 213 214 switch(browsing_connection->pdu_id){ 215 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 216 if (parameter_length < 10){ 217 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 218 break; 219 } 220 221 browsing_connection->scope = packet[pos++]; 222 browsing_connection->start_item = big_endian_read_32(packet, pos); 223 pos += 4; 224 browsing_connection->end_item = big_endian_read_32(packet, pos); 225 pos += 4; 226 uint8_t attr_count = packet[pos++]; 227 browsing_connection->attr_bitmap = 0; 228 229 while (attr_count){ 230 uint32_t attr_id = big_endian_read_32(packet, pos); 231 pos += 4; 232 browsing_connection->attr_bitmap |= (1 << attr_id); 233 attr_count--; 234 } 235 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 236 break; 237 238 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 239 // send total num items 240 if (parameter_length != 1){ 241 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_SCOPE); 242 break; 243 } 244 245 browsing_connection->scope = packet[pos++]; 246 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 247 break; 248 } 249 case AVRCP_PDU_ID_SET_BROWSED_PLAYER: 250 // player_id (2) 251 if (parameter_length != 2){ 252 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 253 break; 254 } 255 if ( (pos + 2) > size ){ 256 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_PLAYER_ID); 257 break; 258 } 259 avrcp_browsing_target_emit_set_browsed_player(avrcp_target_context.browsing_avrcp_callback, channel, big_endian_read_16(packet, pos)); 260 break; 261 262 case AVRCP_PDU_ID_CHANGE_PATH: 263 // one level up or down in the virtual filesystem 264 if (parameter_length != 11){ 265 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 266 break; 267 } 268 uid_counter = big_endian_read_16(packet, pos); 269 pos += 2; 270 direction = (avrcp_browsing_direction_t)packet[pos++]; 271 272 if (direction > AVRCP_BROWSING_DIRECTION_FOLDER_RFU){ 273 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_DIRECTION); 274 break; 275 } 276 item_id = &packet[pos]; 277 avrcp_browsing_target_emit_change_path(avrcp_target_context.browsing_avrcp_callback, channel, uid_counter, direction, item_id); 278 break; 279 280 case AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES:{ 281 if (parameter_length < 12){ 282 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 283 break; 284 } 285 286 uint8_t scope = packet[pos++]; 287 item_id = &packet[pos]; 288 pos += 8; 289 uid_counter = big_endian_read_16(packet, pos); 290 pos += 2; 291 uint8_t attr_num = packet[pos++]; 292 293 uint8_t * attr_list = &packet[pos]; 294 avrcp_browsing_target_emit_get_item_attributes(avrcp_target_context.browsing_avrcp_callback, channel, uid_counter, scope, item_id, attr_num, attr_list); 295 break; 296 } 297 298 default: 299 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 300 log_info("not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 301 break; 302 } 303 browsing_connection->state = AVCTP_CONNECTION_OPENED; 304 break; 305 306 default: 307 break; 308 } 309 break; 310 } 311 312 case HCI_EVENT_PACKET: 313 switch (hci_event_packet_get_type(packet)){ 314 case L2CAP_EVENT_CAN_SEND_NOW: 315 browsing_connection = avrcp_get_browsing_connection_for_l2cap_cid_for_role(AVRCP_TARGET, channel); 316 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 317 browsing_connection->state = AVCTP_CONNECTION_OPENED; 318 avrcp_browsing_target_handle_can_send_now(browsing_connection); 319 break; 320 default: 321 break; 322 } 323 break; 324 325 default: 326 break; 327 } 328 } 329 330 void avrcp_browsing_target_init(void){ 331 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 332 avrcp_browsing_register_target_packet_handler(avrcp_browsing_target_packet_handler); 333 } 334 335 void avrcp_browsing_target_deinit(void){ 336 avrcp_controller_context.browsing_packet_handler = NULL; 337 } 338 339 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 340 btstack_assert(callback != NULL); 341 avrcp_target_context.browsing_avrcp_callback = callback; 342 } 343 344 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){ 345 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 346 if (!avrcp_connection){ 347 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 348 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 349 } 350 351 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 352 if (!connection){ 353 log_info("Could not find a browsing connection."); 354 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 355 } 356 if (connection->state != AVCTP_CONNECTION_OPENED){ 357 return ERROR_CODE_COMMAND_DISALLOWED; 358 } 359 360 // TODO: handle response to SetAddressedPlayer 361 362 uint16_t pos = 0; 363 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 364 uint8_t param_length = 5; 365 uint8_t param_length_pos = pos; 366 pos += 2; 367 368 avrcp_status_code_t status = AVRCP_STATUS_SUCCESS; 369 uint8_t status_pos = pos; 370 pos++; 371 372 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 373 pos += 2; 374 375 // TODO: fragmentation 376 if (attr_list_size > sizeof(connection->cmd_operands)){ 377 connection->attr_list = attr_list; 378 connection->attr_list_size = attr_list_size; 379 log_info(" todo: list too big, invoke fragmentation"); 380 return 1; 381 } 382 383 uint16_t items_byte_len = 0; 384 if (connection->start_item < num_items) { 385 if (connection->end_item < num_items) { 386 items_byte_len = connection->end_item - connection->start_item + 1; 387 } else { 388 items_byte_len = num_items - connection->start_item; 389 } 390 391 } else { 392 big_endian_store_16(connection->cmd_operands, pos, 0); 393 pos += 2; 394 } 395 big_endian_store_16(connection->cmd_operands, pos, items_byte_len); 396 pos += 2; 397 param_length += items_byte_len; 398 399 if (items_byte_len > 0){ 400 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 401 pos += attr_list_size; 402 } else { 403 status = AVRCP_STATUS_RANGE_OUT_OF_BOUNDS; 404 } 405 406 big_endian_store_16(connection->cmd_operands, param_length_pos, param_length); 407 connection->cmd_operands[status_pos] = status; 408 409 btstack_assert(pos <= 400); 410 connection->cmd_operands_length = pos; 411 412 connection->state = AVCTP_W2_SEND_RESPONSE; 413 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 414 return ERROR_CODE_SUCCESS; 415 } 416 417 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){ 418 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 419 if (!avrcp_connection){ 420 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 421 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 422 } 423 424 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 425 if (!connection){ 426 log_info("Could not find a browsing connection."); 427 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 428 } 429 if (connection->state != AVCTP_CONNECTION_OPENED){ 430 return ERROR_CODE_COMMAND_DISALLOWED; 431 } 432 433 uint16_t pos = 0; 434 connection->cmd_operands[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 435 // Param length 436 big_endian_store_16(connection->cmd_operands, pos, 5); 437 pos += 2; 438 connection->cmd_operands[pos++] = status; 439 big_endian_store_32(connection->cmd_operands, pos, num_items); 440 pos += 4; 441 442 connection->cmd_operands_length = pos; 443 connection->state = AVCTP_W2_SEND_RESPONSE; 444 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 445 return ERROR_CODE_SUCCESS; 446 } 447 448 uint8_t avrcp_browsing_target_send_get_item_attributes_response(uint16_t avrcp_browsing_cid, avrcp_status_code_t status, uint8_t * attr_list, uint16_t attr_list_size, uint8_t num_items){ 449 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 450 if (!avrcp_connection){ 451 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 452 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 453 } 454 455 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 456 if (!connection){ 457 log_info("Could not find a browsing connection."); 458 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 459 } 460 if (connection->state != AVCTP_CONNECTION_OPENED){ 461 return ERROR_CODE_COMMAND_DISALLOWED; 462 } 463 464 // TODO: fragmentation 465 if (attr_list_size > (sizeof(connection->cmd_operands) - 5)){ 466 connection->attr_list = attr_list; 467 connection->attr_list_size = attr_list_size; 468 log_info(" todo: list too big, invoke fragmentation"); 469 return 1; 470 } 471 472 uint16_t pos = 0; 473 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_ITEM_ATTRIBUTES; 474 475 uint8_t param_length_pos = pos; 476 big_endian_store_16(connection->cmd_operands, pos, 1); 477 pos += 2; 478 connection->cmd_operands[pos++] = status; 479 480 if (status != AVRCP_STATUS_SUCCESS){ 481 connection->cmd_operands_length = pos; 482 connection->state = AVCTP_W2_SEND_RESPONSE; 483 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 484 return ERROR_CODE_SUCCESS; 485 } 486 487 connection->cmd_operands[pos++] = num_items; 488 (void)memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 489 pos += attr_list_size; 490 491 big_endian_store_16(connection->cmd_operands, param_length_pos, pos - 3); 492 connection->cmd_operands_length = pos; 493 connection->state = AVCTP_W2_SEND_RESPONSE; 494 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 495 return ERROR_CODE_SUCCESS; 496 } 497 498 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){ 499 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 500 if (!avrcp_connection){ 501 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 502 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 503 } 504 505 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 506 if (!connection){ 507 log_info("Could not find a browsing connection."); 508 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 509 } 510 511 if (connection->state != AVCTP_CONNECTION_OPENED) { 512 log_info("Browsing connection wrong state."); 513 return ERROR_CODE_COMMAND_DISALLOWED; 514 } 515 516 connection->browsed_player_id = browsed_player_id; 517 518 uint16_t pos = 0; 519 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 520 big_endian_store_16(connection->cmd_operands, pos, response_size + 2 + 1); // uuid counter + status 521 pos += 2; 522 523 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 524 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 525 pos += 2; 526 527 // TODO: fragmentation 528 if (response_size > sizeof(connection->cmd_operands)){ 529 connection->attr_list = response; 530 connection->attr_list_size = response_size; 531 log_info(" todo: list too big, invoke fragmentation"); 532 return 1; 533 } 534 535 (void)memcpy(&connection->cmd_operands[pos], response, response_size); 536 pos += response_size; 537 btstack_assert(pos <= 255); 538 connection->cmd_operands_length = (uint8_t) pos; 539 540 connection->state = AVCTP_W2_SEND_RESPONSE; 541 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 542 return ERROR_CODE_SUCCESS; 543 } 544 545 uint8_t avrcp_browsing_target_send_reject_set_browsed_player(uint16_t avrcp_browsing_cid, avrcp_status_code_t status){ 546 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 547 if (!avrcp_connection){ 548 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 549 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 550 } 551 552 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 553 if (!connection){ 554 log_info("Could not find a browsing connection."); 555 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 556 } 557 558 if (connection->state != AVCTP_CONNECTION_OPENED) { 559 log_info("Browsing connection wrong state."); 560 return ERROR_CODE_COMMAND_DISALLOWED; 561 } 562 563 int pos = 0; 564 connection->cmd_operands[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 565 big_endian_store_16(connection->cmd_operands, pos, 1); 566 pos += 2; 567 connection->cmd_operands[pos++] = status; 568 connection->cmd_operands_length = pos; 569 570 connection->state = AVCTP_W2_SEND_RESPONSE; 571 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 572 return ERROR_CODE_SUCCESS; 573 } 574 575 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){ 576 avrcp_connection_t * avrcp_connection = avrcp_get_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 577 if (!avrcp_connection){ 578 log_error("Could not find an AVRCP Target connection for browsing_cid 0x%02x.", avrcp_browsing_cid); 579 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 580 } 581 582 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 583 if (!connection){ 584 log_info("Could not find a browsing connection."); 585 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 586 } 587 588 if (connection->state != AVCTP_CONNECTION_OPENED) { 589 log_info("Browsing connection wrong state."); 590 return ERROR_CODE_COMMAND_DISALLOWED; 591 } 592 593 int pos = 0; 594 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 595 big_endian_store_16(connection->cmd_operands, pos, 7); 596 pos += 2; 597 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 598 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 599 pos += 2; 600 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 601 pos += 4; 602 connection->cmd_operands_length = pos; 603 604 connection->state = AVCTP_W2_SEND_RESPONSE; 605 avrcp_browsing_request_can_send_now(connection, connection->l2cap_browsing_cid); 606 return ERROR_CODE_SUCCESS; 607 } 608 609