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 MATTHIAS 24 * RINGWALD 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_controller.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_browsing_controller.h" 48 49 #define PSM_AVCTP_BROWSING 0x001b 50 51 void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context); 52 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 53 54 static avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid, avrcp_context_t * context){ 55 btstack_linked_list_iterator_t it; 56 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 57 while (btstack_linked_list_iterator_has_next(&it)){ 58 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 59 if (connection->avrcp_browsing_cid != browsing_cid) continue; 60 return connection; 61 } 62 return NULL; 63 } 64 65 static avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid, avrcp_context_t * context){ 66 btstack_linked_list_iterator_t it; 67 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 68 while (btstack_linked_list_iterator_has_next(&it)){ 69 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 70 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 71 return connection; 72 } 73 return NULL; 74 } 75 76 static avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 77 btstack_linked_list_iterator_t it; 78 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 79 while (btstack_linked_list_iterator_has_next(&it)){ 80 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 81 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 82 return connection->browsing_connection; 83 } 84 return NULL; 85 } 86 87 static void avrcp_emit_browsing_connection_established(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 88 if (!callback) return; 89 uint8_t event[12]; 90 int pos = 0; 91 event[pos++] = HCI_EVENT_AVRCP_META; 92 event[pos++] = sizeof(event) - 2; 93 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 94 event[pos++] = status; 95 reverse_bd_addr(addr,&event[pos]); 96 pos += 6; 97 little_endian_store_16(event, pos, browsing_cid); 98 pos += 2; 99 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 100 } 101 102 static void avrcp_emit_incoming_browsing_connection(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr){ 103 if (!callback) return; 104 uint8_t event[11]; 105 int pos = 0; 106 event[pos++] = HCI_EVENT_AVRCP_META; 107 event[pos++] = sizeof(event) - 2; 108 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 109 reverse_bd_addr(addr,&event[pos]); 110 pos += 6; 111 little_endian_store_16(event, pos, browsing_cid); 112 pos += 2; 113 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 114 } 115 116 static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){ 117 if (!callback) return; 118 uint8_t event[5]; 119 int pos = 0; 120 event[pos++] = HCI_EVENT_AVRCP_META; 121 event[pos++] = sizeof(event) - 2; 122 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 123 little_endian_store_16(event, pos, browsing_cid); 124 pos += 2; 125 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 126 } 127 128 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 129 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 130 memset(connection, 0, sizeof(avrcp_browsing_connection_t)); 131 connection->state = AVCTP_CONNECTION_IDLE; 132 connection->transaction_label = 0xFF; 133 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(); 134 avrcp_connection->browsing_connection = connection; 135 return connection; 136 } 137 138 static uint8_t avrcp_browsing_connect(bd_addr_t remote_addr, avrcp_context_t * context, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * browsing_cid){ 139 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context); 140 141 if (!avrcp_connection){ 142 log_error("avrcp: there is no previously established AVRCP controller connection."); 143 return ERROR_CODE_COMMAND_DISALLOWED; 144 } 145 146 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 147 if (connection){ 148 log_error(" avrcp_browsing_connect connection exists."); 149 return ERROR_CODE_SUCCESS; 150 } 151 152 connection = avrcp_browsing_create_connection(avrcp_connection); 153 if (!connection){ 154 log_error("avrcp: could not allocate connection struct."); 155 return BTSTACK_MEMORY_ALLOC_FAILED; 156 } 157 158 if (!browsing_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 159 160 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 161 connection->ertm_buffer = ertm_buffer; 162 connection->ertm_buffer_size = size; 163 avrcp_connection->browsing_connection = connection; 164 165 memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 166 167 return l2cap_create_ertm_channel(avrcp_browsing_controller_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 168 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 169 170 } 171 172 void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 173 UNUSED(channel); 174 UNUSED(size); 175 bd_addr_t event_addr; 176 uint16_t local_cid; 177 uint8_t status; 178 avrcp_browsing_connection_t * browsing_connection = NULL; 179 avrcp_connection_t * avrcp_connection = NULL; 180 181 if (packet_type != HCI_EVENT_PACKET) return; 182 183 switch (hci_event_packet_get_type(packet)) { 184 case HCI_EVENT_DISCONNECTION_COMPLETE: 185 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0); 186 break; 187 case L2CAP_EVENT_INCOMING_CONNECTION: 188 l2cap_event_incoming_connection_get_address(packet, event_addr); 189 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 190 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 191 if (!avrcp_connection) { 192 log_error("No previously created AVRCP controller connections"); 193 l2cap_decline_connection(local_cid); 194 break; 195 } 196 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 197 browsing_connection->l2cap_browsing_cid = local_cid; 198 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 199 log_info("Emit AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION browsing_cid 0x%02x, l2cap_signaling_cid 0x%02x\n", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 200 avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr); 201 break; 202 203 case L2CAP_EVENT_CHANNEL_OPENED: 204 l2cap_event_channel_opened_get_address(packet, event_addr); 205 status = l2cap_event_channel_opened_get_status(packet); 206 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 207 208 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 209 if (!avrcp_connection){ 210 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 211 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 212 l2cap_disconnect(local_cid, 0); // reason isn't used 213 break; 214 } 215 216 browsing_connection = avrcp_connection->browsing_connection; 217 if (status != ERROR_CODE_SUCCESS){ 218 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 219 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status); 220 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 221 avrcp_connection->browsing_connection = NULL; 222 break; 223 } 224 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 225 226 browsing_connection->l2cap_browsing_cid = local_cid; 227 228 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 229 browsing_connection->state = AVCTP_CONNECTION_OPENED; 230 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 231 break; 232 233 case L2CAP_EVENT_CHANNEL_CLOSED: 234 // data: event (8), len(8), channel (16) 235 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 236 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 237 238 if (avrcp_connection && avrcp_connection->browsing_connection){ 239 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 240 // free connection 241 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 242 avrcp_connection->browsing_connection = NULL; 243 break; 244 } 245 break; 246 default: 247 break; 248 } 249 } 250 251 static int avrcp_browsing_controller_send_get_folder_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 252 uint8_t command[100]; 253 int pos = 0; 254 // transport header 255 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 256 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 257 // Profile IDentifier (PID) 258 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 259 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 260 command[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 261 262 uint32_t attribute_count = 0; 263 uint32_t attributes_to_copy = 0; 264 265 switch (connection->attr_bitmap){ 266 case AVRCP_MEDIA_ATTR_NONE: 267 attribute_count = AVRCP_MEDIA_ATTR_NONE; // 0xFFFFFFFF 268 break; 269 case AVRCP_MEDIA_ATTR_ALL: 270 attribute_count = AVRCP_MEDIA_ATTR_ALL; // 0 271 break; 272 default: 273 attribute_count = count_set_bits_uint32(connection->attr_bitmap & 0xff); 274 attributes_to_copy = attribute_count; 275 break; 276 } 277 278 big_endian_store_16(command, pos, 10 + attribute_count); 279 pos += 2; 280 command[pos++] = connection->scope; 281 big_endian_store_32(command, pos, connection->start_item); 282 pos += 4; 283 big_endian_store_32(command, pos, connection->end_item); 284 pos += 4; 285 command[pos++] = attribute_count; 286 287 int bit_position = 1; 288 while (attributes_to_copy){ 289 if (connection->attr_bitmap & (1 << bit_position)){ 290 big_endian_store_32(command, pos, bit_position); 291 pos += 4; 292 attributes_to_copy--; 293 } 294 bit_position++; 295 } 296 297 return l2cap_send(cid, command, pos); 298 } 299 300 static int avrcp_browsing_controller_send_change_path_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 301 uint8_t command[100]; 302 int pos = 0; 303 // transport header 304 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 305 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 306 // Profile IDentifier (PID) 307 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 308 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 309 command[pos++] = AVRCP_PDU_ID_CHANGE_PATH; 310 311 big_endian_store_16(command, pos, 11); 312 pos += 2; 313 pos += 2; 314 command[pos++] = connection->direction; 315 memcpy(command+pos, connection->folder_uid, 8); 316 pos += 8; 317 return l2cap_send(cid, command, pos); 318 } 319 320 static int avrcp_browsing_controller_send_search_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 321 uint8_t command[100]; 322 int pos = 0; 323 // transport header 324 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 325 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 326 // Profile IDentifier (PID) 327 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 328 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 329 command[pos++] = AVRCP_PDU_ID_SEARCH; 330 331 big_endian_store_16(command, pos, 4 + connection->search_str_len); 332 pos += 2; 333 334 big_endian_store_16(command, pos, 0x006A); 335 pos += 2; 336 big_endian_store_16(command, pos, connection->search_str_len); 337 pos += 2; 338 339 memcpy(command+pos,connection->search_str, connection->search_str_len); 340 pos += connection->search_str_len; 341 return l2cap_send(cid, command, pos); 342 } 343 344 static int avrcp_browsing_controller_send_set_browsed_player_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 345 uint8_t command[100]; 346 int pos = 0; 347 // transport header 348 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 349 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 350 // Profile IDentifier (PID) 351 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 352 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 353 command[pos++] = AVRCP_PDU_ID_SET_BROWSED_PLAYER; 354 355 big_endian_store_16(command, pos, 2); 356 pos += 2; 357 big_endian_store_16(command, pos, connection->browsed_player_id); 358 pos += 2; 359 return l2cap_send(cid, command, pos); 360 } 361 362 static int avrcp_browsing_controller_send_get_total_nr_items_cmd(uint16_t cid, avrcp_browsing_connection_t * connection){ 363 uint8_t command[7]; 364 int pos = 0; 365 // transport header 366 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 367 command[pos++] = (connection->transaction_label << 4) | (AVRCP_SINGLE_PACKET << 2) | (AVRCP_COMMAND_FRAME << 1) | 0; 368 // Profile IDentifier (PID) 369 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 370 command[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 371 command[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 372 373 big_endian_store_16(command, pos, 1); 374 pos += 2; 375 command[pos++] = connection->get_total_nr_items_scope; 376 return l2cap_send(cid, command, pos); 377 } 378 379 static void avrcp_browsing_controller_handle_can_send_now(avrcp_browsing_connection_t * connection){ 380 switch (connection->state){ 381 case AVCTP_CONNECTION_OPENED: 382 if (connection->set_browsed_player_id){ 383 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 384 connection->set_browsed_player_id = 0; 385 avrcp_browsing_controller_send_set_browsed_player_cmd(connection->l2cap_browsing_cid, connection); 386 break; 387 } 388 389 if (connection->get_total_nr_items){ 390 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 391 connection->get_total_nr_items = 0; 392 avrcp_browsing_controller_send_get_total_nr_items_cmd(connection->l2cap_browsing_cid, connection); 393 break; 394 } 395 396 if (connection->get_folder_item){ 397 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 398 connection->get_folder_item = 0; 399 avrcp_browsing_controller_send_get_folder_items_cmd(connection->l2cap_browsing_cid, connection); 400 break; 401 } 402 if (connection->change_path){ 403 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 404 connection->change_path = 0; 405 avrcp_browsing_controller_send_change_path_cmd(connection->l2cap_browsing_cid, connection); 406 break; 407 } 408 if (connection->search){ 409 connection->state = AVCTP_W2_RECEIVE_RESPONSE; 410 connection->search = 0; 411 avrcp_browsing_controller_send_search_cmd(connection->l2cap_browsing_cid, connection); 412 break; 413 } 414 break; 415 default: 416 return; 417 } 418 } 419 420 421 static void avrcp_browsing_controller_emit_done_with_uid_counter(btstack_packet_handler_t callback, uint16_t browsing_cid, uint16_t uid_counter, uint8_t browsing_status, uint8_t bluetooth_status){ 422 if (!callback) return; 423 uint8_t event[9]; 424 int pos = 0; 425 event[pos++] = HCI_EVENT_AVRCP_META; 426 event[pos++] = sizeof(event) - 2; 427 event[pos++] = AVRCP_SUBEVENT_BROWSING_DONE; 428 little_endian_store_16(event, pos, browsing_cid); 429 pos += 2; 430 little_endian_store_16(event, pos, uid_counter); 431 pos += 2; 432 event[pos++] = browsing_status; 433 event[pos++] = bluetooth_status; 434 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 435 } 436 437 static void avrcp_parser_reset(avrcp_browsing_connection_t * connection){ 438 connection->parser_attribute_header_pos = 0; 439 connection->parsed_attribute_value_offset = 0; 440 connection->parsed_num_attributes = 0; 441 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 442 } 443 444 445 static void avrcp_browsing_parser_process_byte(uint8_t byte, avrcp_browsing_connection_t * connection){ 446 uint8_t prepended_header_size = 1; 447 switch(connection->parser_state){ 448 case AVRCP_PARSER_GET_ATTRIBUTE_HEADER:{ 449 connection->parser_attribute_header[connection->parser_attribute_header_pos++] = byte; 450 if (connection->parser_attribute_header_pos < AVRCP_BROWSING_ITEM_HEADER_LEN) break; 451 452 uint16_t attribute_total_value_len = big_endian_read_16(connection->parser_attribute_header, 1); 453 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = connection->parser_attribute_header[0]; // prepend with item type 454 connection->parsed_attribute_value_len = btstack_min(attribute_total_value_len, AVRCP_MAX_ATTRIBUTTE_SIZE - prepended_header_size); // reduce AVRCP_MAX_ATTRIBUTTE_SIZE for the size ot item type 455 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_VALUE; 456 break; 457 } 458 case AVRCP_PARSER_GET_ATTRIBUTE_VALUE:{ 459 if (connection->parsed_attribute_value_offset < connection->parsed_attribute_value_len + prepended_header_size){ 460 connection->parsed_attribute_value[connection->parsed_attribute_value_offset++] = byte; 461 break; 462 } 463 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1)){ 464 connection->parser_state = AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE; 465 break; 466 } 467 468 connection->parsed_num_attributes++; 469 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 470 471 if (connection->parsed_num_attributes == connection->num_items){ 472 avrcp_parser_reset(connection); 473 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 474 connection->parser_attribute_header_pos = 0; 475 break; 476 } 477 break; 478 } 479 case AVRCP_PARSER_IGNORE_REST_OF_ATTRIBUTE_VALUE: 480 if (connection->parsed_attribute_value_offset < big_endian_read_16(connection->parser_attribute_header, 1) + prepended_header_size){ 481 connection->parsed_attribute_value_offset++; 482 break; 483 } 484 connection->parsed_num_attributes++; 485 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, connection->l2cap_browsing_cid, &connection->parsed_attribute_value[0], connection->parsed_attribute_value_offset); 486 487 if (connection->parsed_num_attributes == connection->num_items){ 488 avrcp_parser_reset(connection); 489 connection->parser_state = AVRCP_PARSER_GET_ATTRIBUTE_HEADER; 490 connection->parser_attribute_header_pos = 0; 491 break; 492 } 493 break; 494 default: 495 break; 496 } 497 } 498 499 static void avrcp_browsing_parse_and_emit_element_attrs(uint8_t * packet, uint16_t num_bytes_to_read, avrcp_browsing_connection_t * connection){ 500 int i; 501 for (i=0;i<num_bytes_to_read;i++){ 502 avrcp_browsing_parser_process_byte(packet[i], connection); 503 } 504 } 505 506 static void avrcp_browsing_controller_emit_done(btstack_packet_handler_t callback, uint16_t browsing_cid, uint8_t browsing_status, uint8_t bluetooth_status){ 507 avrcp_browsing_controller_emit_done_with_uid_counter(callback, browsing_cid, 0, browsing_status, bluetooth_status); 508 } 509 510 511 static void avrcp_browsing_controller_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 512 avrcp_browsing_connection_t * browsing_connection; 513 514 switch (packet_type) { 515 case L2CAP_DATA_PACKET:{ 516 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 517 if (!browsing_connection) break; 518 int pos = 0; 519 uint8_t transport_header = packet[pos++]; 520 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 521 // uint8_t transaction_label = transport_header >> 4; 522 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 523 // printf("L2CAP_DATA_PACKET, packet type \n"); 524 switch (avctp_packet_type){ 525 case AVRCP_SINGLE_PACKET: 526 case AVRCP_START_PACKET: 527 // uint8_t frame_type = (transport_header & 0x03) >> 1; 528 // uint8_t ipid = transport_header & 0x01; 529 pos += 2; 530 browsing_connection->num_packets = 1; 531 if (avctp_packet_type == AVRCP_START_PACKET){ 532 browsing_connection->num_packets = packet[pos++]; 533 } 534 if (pos + 4 > size){ 535 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND, ERROR_CODE_SUCCESS); 536 return; 537 } 538 browsing_connection->pdu_id = packet[pos++]; 539 // uint16_t length = big_endian_read_16(packet, pos); 540 pos += 2; 541 browsing_connection->browsing_status = packet[pos++]; 542 if (browsing_connection->browsing_status != AVRCP_BROWSING_ERROR_CODE_SUCCESS){ 543 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 544 return; 545 } 546 browsing_connection->uid_counter = big_endian_read_16(packet, pos); 547 pos += 2; 548 break; 549 default: 550 break; 551 } 552 553 uint32_t i; 554 switch(browsing_connection->pdu_id){ 555 case AVRCP_PDU_ID_CHANGE_PATH: 556 printf("AVRCP_PDU_ID_CHANGE_PATH \n"); 557 break; 558 case AVRCP_PDU_ID_SET_ADDRESSED_PLAYER: 559 printf("AVRCP_PDU_ID_SET_ADDRESSED_PLAYER \n"); 560 break; 561 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 562 uint32_t num_items = big_endian_read_32(packet, pos); 563 pos += 4; 564 printf("TDO: send event, uid_counter %d, num_items %d\n", browsing_connection->uid_counter, num_items); 565 break; 566 } 567 case AVRCP_PDU_ID_SET_BROWSED_PLAYER:{ 568 // uint32_t num_items = big_endian_read_32(packet, pos); 569 pos += 4; 570 // uint16_t charset = big_endian_read_16(packet, pos); 571 pos += 2; 572 uint8_t folder_depth = packet[pos++]; 573 574 for (i = 0; i < folder_depth; i++){ 575 uint16_t folder_name_length = big_endian_read_16(packet, pos); 576 pos += 2; 577 // reuse packet and add data type as a header 578 packet[pos-1] = AVRCP_BROWSING_MEDIA_ROOT_FOLDER; 579 (*avrcp_controller_context.browsing_avrcp_callback)(AVRCP_BROWSING_DATA_PACKET, channel, packet+pos-1, folder_name_length+1); 580 pos += folder_name_length; 581 } 582 break; 583 } 584 585 case AVRCP_PDU_ID_GET_FOLDER_ITEMS:{ 586 printf("AVRCP_PDU_ID_GET_FOLDER_ITEMS\n"); 587 switch (avctp_packet_type){ 588 case AVRCP_SINGLE_PACKET: 589 case AVRCP_START_PACKET: 590 avrcp_parser_reset(browsing_connection); 591 browsing_connection->num_items = big_endian_read_16(packet, pos); //num_items 592 pos += 2; 593 printf(" num items %d\n", browsing_connection->num_items); 594 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 595 break; 596 597 case AVRCP_CONTINUE_PACKET: 598 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 599 break; 600 601 case AVRCP_END_PACKET: 602 avrcp_browsing_parse_and_emit_element_attrs(packet+pos, size-pos, browsing_connection); 603 avrcp_parser_reset(browsing_connection); 604 break; 605 } 606 break; 607 } 608 609 case AVRCP_PDU_ID_SEARCH:{ 610 uint32_t num_items = big_endian_read_32(packet, pos); 611 printf("TODO: send as event, search found %d items\n", num_items); 612 break; 613 } 614 default: 615 break; 616 } 617 618 switch (avctp_packet_type){ 619 case AVRCP_SINGLE_PACKET: 620 case AVRCP_END_PACKET: 621 browsing_connection->state = AVCTP_CONNECTION_OPENED; 622 avrcp_browsing_controller_emit_done(avrcp_controller_context.browsing_avrcp_callback, channel, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 623 break; 624 default: 625 break; 626 } 627 break; 628 } 629 case HCI_EVENT_PACKET: 630 switch (hci_event_packet_get_type(packet)){ 631 case L2CAP_EVENT_CAN_SEND_NOW: 632 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_controller_context); 633 if (!browsing_connection) break; 634 avrcp_browsing_controller_handle_can_send_now(browsing_connection); 635 break; 636 default: 637 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_controller_context); 638 break; 639 } 640 default: 641 break; 642 } 643 } 644 645 void avrcp_browsing_controller_init(void){ 646 avrcp_controller_context.browsing_packet_handler = avrcp_browsing_controller_packet_handler; 647 l2cap_register_service(&avrcp_browsing_controller_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0); 648 } 649 650 void avrcp_browsing_controller_register_packet_handler(btstack_packet_handler_t callback){ 651 if (callback == NULL){ 652 log_error("avrcp_browsing_controller_register_packet_handler called with NULL callback"); 653 return; 654 } 655 avrcp_controller_context.browsing_avrcp_callback = callback; 656 } 657 658 uint8_t avrcp_browsing_controller_connect(bd_addr_t bd_addr, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){ 659 return avrcp_browsing_connect(bd_addr, &avrcp_controller_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 660 } 661 662 uint8_t avrcp_browsing_controller_disconnect(uint16_t avrcp_browsing_cid){ 663 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 664 if (!avrcp_connection){ 665 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 666 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 667 } 668 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 669 670 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 671 return ERROR_CODE_SUCCESS; 672 } 673 674 uint8_t avrcp_avrcp_browsing_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config){ 675 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 676 if (!avrcp_connection){ 677 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 678 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 679 } 680 if (!avrcp_connection->browsing_connection){ 681 log_error("avrcp_avrcp_browsing_decline_incoming_connection: no browsing connection."); 682 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 683 } 684 685 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 686 log_error("avrcp_avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state."); 687 return ERROR_CODE_COMMAND_DISALLOWED; 688 } 689 690 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 691 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 692 avrcp_connection->browsing_connection->ertm_buffer_size = size; 693 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 694 l2cap_accept_ertm_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid, &avrcp_connection->browsing_connection->ertm_config, avrcp_connection->browsing_connection->ertm_buffer, avrcp_connection->browsing_connection->ertm_buffer_size); 695 return ERROR_CODE_SUCCESS; 696 } 697 698 uint8_t avrcp_avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 699 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 700 if (!avrcp_connection){ 701 log_error("avrcp_avrcp_browsing_decline_incoming_connection: could not find a connection."); 702 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 703 } 704 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 705 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 706 707 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 708 // free connection 709 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 710 avrcp_connection->browsing_connection = NULL; 711 return ERROR_CODE_SUCCESS; 712 } 713 714 /** 715 * @brief Retrieve a listing of the contents of a folder. 716 * @param scope 0-player list, 1-virtual file system, 2-search, 3-now playing 717 * @param start_item 718 * @param end_item 719 * @param attribute_count 720 * @param attribute_list 721 **/ 722 static uint8_t avrcp_browsing_controller_get_folder_items(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 723 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 724 if (!avrcp_connection){ 725 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 726 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 727 } 728 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 729 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 730 731 connection->get_folder_item = 1; 732 connection->scope = scope; 733 connection->start_item = start_item; 734 connection->end_item = end_item; 735 connection->attr_bitmap = attr_bitmap; 736 737 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 738 return ERROR_CODE_SUCCESS; 739 } 740 741 uint8_t avrcp_browsing_controller_get_media_players(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 742 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_LIST, start_item, end_item, attr_bitmap); 743 } 744 745 uint8_t avrcp_browsing_controller_browse_file_system(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 746 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 1, 0, 0xFFFFFFFF, attr_bitmap); 747 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_MEDIA_PLAYER_VIRTUAL_FILESYSTEM, start_item, end_item, attr_bitmap); 748 } 749 750 uint8_t avrcp_browsing_controller_browse_media(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 751 // return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, 2, 0, 0xFFFFFFFF, 0, NULL); 752 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_SEARCH, start_item, end_item, attr_bitmap); 753 } 754 755 uint8_t avrcp_browsing_controller_browse_now_playing_list(uint16_t avrcp_browsing_cid, uint32_t start_item, uint32_t end_item, uint32_t attr_bitmap){ 756 return avrcp_browsing_controller_get_folder_items(avrcp_browsing_cid, AVRCP_BROWSING_NOW_PLAYING, start_item, end_item, attr_bitmap); 757 } 758 759 760 uint8_t avrcp_browsing_controller_set_browsed_player(uint16_t avrcp_browsing_cid, uint16_t browsed_player_id){ 761 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 762 if (!avrcp_connection){ 763 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 764 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 765 } 766 767 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 768 if (connection->state != AVCTP_CONNECTION_OPENED){ 769 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 770 return ERROR_CODE_COMMAND_DISALLOWED; 771 } 772 773 connection->set_browsed_player_id = 1; 774 connection->browsed_player_id = browsed_player_id; 775 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 776 return ERROR_CODE_SUCCESS; 777 } 778 779 /** 780 * @brief Retrieve a listing of the contents of a folder. 781 * @param direction 0-folder up, 1-folder down 782 * @param folder_uid 8 bytes long 783 **/ 784 uint8_t avrcp_browsing_controller_change_path(uint16_t avrcp_browsing_cid, uint8_t direction, uint8_t * folder_uid){ 785 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 786 if (!avrcp_connection){ 787 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 788 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 789 } 790 791 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 792 793 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 794 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 795 return ERROR_CODE_COMMAND_DISALLOWED; 796 } 797 798 if (!connection->browsed_player_id){ 799 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 800 return ERROR_CODE_COMMAND_DISALLOWED; 801 } 802 printf(" send change path\n"); 803 connection->change_path = 1; 804 connection->direction = direction; 805 memset(connection->folder_uid, 0, 8); 806 if (folder_uid){ 807 memcpy(connection->folder_uid, folder_uid, 8); 808 } 809 810 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 811 return ERROR_CODE_SUCCESS; 812 } 813 814 uint8_t avrcp_browsing_controller_go_up_one_level(uint16_t avrcp_browsing_cid){ 815 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 0, NULL); 816 } 817 818 uint8_t avrcp_browsing_controller_go_down_one_level(uint16_t avrcp_browsing_cid, uint8_t * folder_uid){ 819 return avrcp_browsing_controller_change_path(avrcp_browsing_cid, 1, folder_uid); 820 } 821 822 uint8_t avrcp_browsing_controller_search(uint16_t avrcp_browsing_cid, uint16_t search_str_len, char * search_str){ 823 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 824 if (!avrcp_connection){ 825 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 826 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 827 } 828 829 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 830 831 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 832 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 833 return ERROR_CODE_COMMAND_DISALLOWED; 834 } 835 836 if (!connection->browsed_player_id){ 837 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 838 return ERROR_CODE_COMMAND_DISALLOWED; 839 } 840 if (!search_str || search_str_len == 0){ 841 return AVRCP_BROWSING_ERROR_CODE_INVALID_COMMAND; 842 } 843 844 connection->search = 1; 845 846 connection->search_str_len = btstack_min(search_str_len, sizeof(connection->search_str)-1); 847 memset(connection->search_str, 0, sizeof(connection->search_str)); 848 memcpy(connection->search_str, search_str, connection->search_str_len); 849 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 850 return ERROR_CODE_SUCCESS; 851 } 852 853 uint8_t avrcp_browsing_controller_get_total_nr_items(uint16_t avrcp_browsing_cid, avrcp_browsing_scope_t scope){ 854 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_controller_context); 855 if (!avrcp_connection){ 856 log_error("avrcp_browsing_controller_change_path: could not find a connection."); 857 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 858 } 859 860 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 861 862 if (!connection || connection->state != AVCTP_CONNECTION_OPENED){ 863 log_error("avrcp_browsing_controller_change_path: connection in wrong state."); 864 return ERROR_CODE_COMMAND_DISALLOWED; 865 } 866 867 if (!connection->browsed_player_id){ 868 log_error("avrcp_browsing_controller_change_path: no browsed player set."); 869 return ERROR_CODE_COMMAND_DISALLOWED; 870 } 871 connection->get_total_nr_items = 1; 872 connection->get_total_nr_items_scope = scope; 873 avrcp_request_can_send_now(avrcp_connection, connection->l2cap_browsing_cid); 874 return ERROR_CODE_SUCCESS; 875 }