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_target.c" 39 40 #include <stdint.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 #include <inttypes.h> 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_browsing_target.h" 48 49 #define PSM_AVCTP_BROWSING 0x001b 50 51 static 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_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 53 54 static void avrcp_browsing_target_request_can_send_now(avrcp_browsing_connection_t * connection, uint16_t l2cap_cid){ 55 connection->wait_to_send = 1; 56 l2cap_request_can_send_now_event(l2cap_cid); 57 } 58 59 static int avrcp_browsing_target_handle_can_send_now(avrcp_browsing_connection_t * connection){ 60 int pos = 0; 61 // l2cap_reserve_packet_buffer(); 62 // uint8_t * packet = l2cap_get_outgoing_buffer(); 63 uint8_t packet[100]; 64 connection->packet_type = AVRCP_SINGLE_PACKET; 65 66 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 67 // Profile IDentifier (PID) 68 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 69 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 70 memcpy(packet+pos, connection->cmd_operands, connection->cmd_operands_length); 71 // printf_hexdump(packet+pos, connection->cmd_operands_length); 72 73 pos += connection->cmd_operands_length; 74 connection->wait_to_send = 0; 75 // return l2cap_send_prepared(connection->l2cap_browsing_cid, pos); 76 return l2cap_send(connection->l2cap_browsing_cid, packet, pos); 77 } 78 79 80 static uint8_t avrcp_browsing_target_response_general_reject(avrcp_browsing_connection_t * connection, avrcp_status_code_t status){ 81 // AVRCP_CTYPE_RESPONSE_REJECTED 82 int pos = 0; 83 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 84 // connection->cmd_operands[pos++] = 0; 85 // param length 86 big_endian_store_16(connection->cmd_operands, pos, 1); 87 pos += 2; 88 connection->cmd_operands[pos++] = status; 89 connection->cmd_operands_length = 4; 90 connection->state = AVCTP_W2_SEND_RESPONSE; 91 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 92 return ERROR_CODE_SUCCESS; 93 } 94 95 static avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid, avrcp_context_t * context){ 96 btstack_linked_list_iterator_t it; 97 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 98 while (btstack_linked_list_iterator_has_next(&it)){ 99 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 100 if (connection->avrcp_browsing_cid != browsing_cid) continue; 101 return connection; 102 } 103 return NULL; 104 } 105 106 static avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid, avrcp_context_t * context){ 107 btstack_linked_list_iterator_t it; 108 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 109 while (btstack_linked_list_iterator_has_next(&it)){ 110 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 111 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 112 return connection; 113 } 114 return NULL; 115 } 116 117 static avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 118 btstack_linked_list_iterator_t it; 119 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 120 while (btstack_linked_list_iterator_has_next(&it)){ 121 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 122 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 123 return connection->browsing_connection; 124 } 125 return NULL; 126 } 127 128 static void avrcp_browsing_target_emit_get_folder_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 129 if (!callback) return; 130 uint8_t event[10]; 131 int pos = 0; 132 event[pos++] = HCI_EVENT_AVRCP_META; 133 event[pos++] = sizeof(event) - 2; 134 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_FOLDER_ITEMS; 135 little_endian_store_16(event, pos, browsing_cid); 136 pos += 2; 137 event[pos++] = connection->scope; 138 big_endian_store_32(event, pos, connection->attr_bitmap); 139 pos += 4; 140 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 141 } 142 143 static void avrcp_emit_browsing_connection_established(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 144 if (!callback) return; 145 uint8_t event[12]; 146 int pos = 0; 147 event[pos++] = HCI_EVENT_AVRCP_META; 148 event[pos++] = sizeof(event) - 2; 149 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 150 event[pos++] = status; 151 reverse_bd_addr(addr,&event[pos]); 152 pos += 6; 153 little_endian_store_16(event, pos, browsing_cid); 154 pos += 2; 155 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void avrcp_emit_incoming_browsing_connection(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr){ 159 if (!callback) return; 160 uint8_t event[11]; 161 int pos = 0; 162 event[pos++] = HCI_EVENT_AVRCP_META; 163 event[pos++] = sizeof(event) - 2; 164 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 165 reverse_bd_addr(addr,&event[pos]); 166 pos += 6; 167 little_endian_store_16(event, pos, browsing_cid); 168 pos += 2; 169 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 170 } 171 172 static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){ 173 if (!callback) return; 174 uint8_t event[5]; 175 int pos = 0; 176 event[pos++] = HCI_EVENT_AVRCP_META; 177 event[pos++] = sizeof(event) - 2; 178 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 179 little_endian_store_16(event, pos, browsing_cid); 180 pos += 2; 181 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 182 } 183 184 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 185 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 186 memset(connection, 0, sizeof(avrcp_browsing_connection_t)); 187 connection->state = AVCTP_CONNECTION_IDLE; 188 connection->transaction_label = 0xFF; 189 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(); 190 avrcp_connection->browsing_connection = connection; 191 return connection; 192 } 193 194 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){ 195 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context); 196 197 if (!avrcp_connection){ 198 log_error("avrcp: there is no previously established AVRCP controller connection."); 199 return ERROR_CODE_COMMAND_DISALLOWED; 200 } 201 202 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 203 if (connection){ 204 log_error(" avrcp_browsing_connect connection exists."); 205 return ERROR_CODE_SUCCESS; 206 } 207 208 connection = avrcp_browsing_create_connection(avrcp_connection); 209 if (!connection){ 210 log_error("avrcp: could not allocate connection struct."); 211 return BTSTACK_MEMORY_ALLOC_FAILED; 212 } 213 214 if (!browsing_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 215 216 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 217 connection->ertm_buffer = ertm_buffer; 218 connection->ertm_buffer_size = size; 219 avrcp_connection->browsing_connection = connection; 220 221 memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 222 223 return l2cap_create_ertm_channel(avrcp_browsing_target_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 224 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 225 226 } 227 228 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 229 UNUSED(channel); 230 UNUSED(size); 231 bd_addr_t event_addr; 232 uint16_t local_cid; 233 uint8_t status; 234 avrcp_browsing_connection_t * browsing_connection = NULL; 235 avrcp_connection_t * avrcp_connection = NULL; 236 237 if (packet_type != HCI_EVENT_PACKET) return; 238 239 switch (hci_event_packet_get_type(packet)) { 240 case HCI_EVENT_DISCONNECTION_COMPLETE: 241 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0); 242 break; 243 case L2CAP_EVENT_INCOMING_CONNECTION: 244 l2cap_event_incoming_connection_get_address(packet, event_addr); 245 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 246 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 247 if (!avrcp_connection) { 248 log_error("No previously created AVRCP controller connections"); 249 l2cap_decline_connection(local_cid); 250 break; 251 } 252 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 253 browsing_connection->l2cap_browsing_cid = local_cid; 254 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 255 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); 256 avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr); 257 break; 258 259 case L2CAP_EVENT_CHANNEL_OPENED: 260 l2cap_event_channel_opened_get_address(packet, event_addr); 261 status = l2cap_event_channel_opened_get_status(packet); 262 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 263 264 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 265 if (!avrcp_connection){ 266 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 267 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 268 l2cap_disconnect(local_cid, 0); // reason isn't used 269 break; 270 } 271 272 browsing_connection = avrcp_connection->browsing_connection; 273 if (status != ERROR_CODE_SUCCESS){ 274 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 275 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status); 276 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 277 avrcp_connection->browsing_connection = NULL; 278 break; 279 } 280 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 281 282 browsing_connection->l2cap_browsing_cid = local_cid; 283 284 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 285 browsing_connection->state = AVCTP_CONNECTION_OPENED; 286 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 287 break; 288 289 case L2CAP_EVENT_CHANNEL_CLOSED: 290 // data: event (8), len(8), channel (16) 291 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 292 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 293 294 if (avrcp_connection && avrcp_connection->browsing_connection){ 295 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 296 // free connection 297 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 298 avrcp_connection->browsing_connection = NULL; 299 break; 300 } 301 break; 302 default: 303 break; 304 } 305 } 306 307 308 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 309 avrcp_browsing_connection_t * browsing_connection; 310 311 switch (packet_type) { 312 case L2CAP_DATA_PACKET:{ 313 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_target_context); 314 if (!browsing_connection) break; 315 printf_hexdump(packet,size); 316 317 int pos = 0; 318 uint8_t transport_header = packet[pos++]; 319 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 320 browsing_connection->transaction_label = transport_header >> 4; 321 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 322 printf("L2CAP_DATA_PACKET, transaction_label %d\n", browsing_connection->transaction_label); 323 switch (avctp_packet_type){ 324 case AVRCP_SINGLE_PACKET: 325 case AVRCP_START_PACKET: 326 // uint8_t frame_type = (transport_header & 0x03) >> 1; 327 // uint8_t ipid = transport_header & 0x01; 328 browsing_connection->subunit_type = packet[pos++] >> 2; 329 browsing_connection->subunit_id = 0; 330 browsing_connection->command_opcode = packet[pos++]; 331 // printf("subunit_id") 332 // pos += 2; 333 browsing_connection->num_packets = 1; 334 if (avctp_packet_type == AVRCP_START_PACKET){ 335 browsing_connection->num_packets = packet[pos++]; 336 } 337 browsing_connection->pdu_id = packet[pos++]; 338 // uint16_t length = big_endian_read_16(packet, pos); 339 // pos += 2; 340 break; 341 default: 342 break; 343 } 344 printf("pdu id 0x%2x\n", browsing_connection->pdu_id); 345 // uint32_t i; 346 switch(browsing_connection->pdu_id){ 347 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 348 printf("\n"); 349 browsing_connection->scope = packet[pos++]; 350 browsing_connection->start_item = big_endian_read_32(packet, pos); 351 pos += 4; 352 browsing_connection->end_item = big_endian_read_32(packet, pos); 353 pos += 4; 354 uint8_t attr_count = packet[pos++]; 355 356 while (attr_count){ 357 uint32_t attr_id = big_endian_read_32(packet, pos); 358 pos += 4; 359 browsing_connection->attr_bitmap |= (1 << attr_id); 360 attr_count--; 361 } 362 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 363 364 break; 365 default: 366 printf(" not parsed pdu ID 0x%02x\n", browsing_connection->pdu_id); 367 break; 368 } 369 370 switch (avctp_packet_type){ 371 case AVRCP_SINGLE_PACKET: 372 case AVRCP_END_PACKET: 373 printf("send avrcp_browsing_target_response_general_reject\n"); 374 browsing_connection->state = AVCTP_CONNECTION_OPENED; 375 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 376 // avrcp_browsing_target_emit_done_with_uid_counter(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection->uid_counter, browsing_connection->browsing_status, ERROR_CODE_SUCCESS); 377 break; 378 default: 379 break; 380 } 381 // printf(" paket done\n"); 382 break; 383 } 384 385 case HCI_EVENT_PACKET: 386 switch (hci_event_packet_get_type(packet)){ 387 case L2CAP_EVENT_CAN_SEND_NOW: 388 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_target_context); 389 if (!browsing_connection) break; 390 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 391 browsing_connection->state = AVCTP_CONNECTION_OPENED; 392 avrcp_browsing_target_handle_can_send_now(browsing_connection); 393 break; 394 default: 395 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_target_context); 396 break; 397 } 398 break; 399 400 default: 401 break; 402 } 403 } 404 405 void avrcp_browsing_target_init(void){ 406 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 407 l2cap_register_service(&avrcp_browsing_target_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_0); 408 } 409 410 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 411 if (callback == NULL){ 412 log_error("avrcp_browsing_target_register_packet_handler called with NULL callback"); 413 return; 414 } 415 avrcp_target_context.browsing_avrcp_callback = callback; 416 } 417 418 uint8_t avrcp_browsing_target_connect(bd_addr_t bd_addr, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){ 419 return avrcp_browsing_connect(bd_addr, &avrcp_target_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 420 } 421 422 uint8_t avrcp_browsing_target_disconnect(uint16_t avrcp_browsing_cid){ 423 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 424 if (!avrcp_connection){ 425 log_error("avrcp_browsing_target_disconnect: could not find a connection."); 426 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 427 } 428 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 429 430 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 431 return ERROR_CODE_SUCCESS; 432 } 433 434 uint8_t avrcp_browsing_target_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t size, l2cap_ertm_config_t * ertm_config){ 435 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 436 if (!avrcp_connection){ 437 log_error("avrcp_browsing_decline_incoming_connection: could not find a connection."); 438 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 439 } 440 if (!avrcp_connection->browsing_connection){ 441 log_error("avrcp_browsing_decline_incoming_connection: no browsing connection."); 442 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 443 } 444 445 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 446 log_error("avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state."); 447 return ERROR_CODE_COMMAND_DISALLOWED; 448 } 449 450 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 451 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 452 avrcp_connection->browsing_connection->ertm_buffer_size = size; 453 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 454 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); 455 return ERROR_CODE_SUCCESS; 456 } 457 458 uint8_t avrcp_browsing_target_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 459 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 460 if (!avrcp_connection){ 461 log_error("avrcp_browsing_decline_incoming_connection: could not find a connection."); 462 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 463 } 464 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 465 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 466 467 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 468 // free connection 469 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 470 avrcp_connection->browsing_connection = NULL; 471 return ERROR_CODE_SUCCESS; 472 } 473