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 // printf("avrcp_browsing_target_handle_can_send_now, cmd_operands_length %d\n", connection->cmd_operands_length); 62 // printf_hexdump(connection->cmd_operands, connection->cmd_operands_length); 63 64 // l2cap_reserve_packet_buffer(); 65 // uint8_t * packet = l2cap_get_outgoing_buffer(); 66 uint8_t packet[300]; 67 connection->packet_type = AVRCP_SINGLE_PACKET; 68 69 packet[pos++] = (connection->transaction_label << 4) | (connection->packet_type << 2) | (AVRCP_RESPONSE_FRAME << 1) | 0; 70 // Profile IDentifier (PID) 71 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL >> 8; 72 packet[pos++] = BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL & 0x00FF; 73 memcpy(packet+pos, connection->cmd_operands, connection->cmd_operands_length); 74 75 pos += connection->cmd_operands_length; 76 connection->wait_to_send = 0; 77 // return l2cap_send_prepared(connection->l2cap_browsing_cid, pos); 78 return l2cap_send(connection->l2cap_browsing_cid, packet, pos); 79 } 80 81 82 static uint8_t avrcp_browsing_target_response_general_reject(avrcp_browsing_connection_t * connection, avrcp_status_code_t status){ 83 // AVRCP_CTYPE_RESPONSE_REJECTED 84 int pos = 0; 85 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 86 // connection->cmd_operands[pos++] = 0; 87 // param length 88 big_endian_store_16(connection->cmd_operands, pos, 1); 89 pos += 2; 90 connection->cmd_operands[pos++] = status; 91 connection->cmd_operands_length = 4; 92 connection->state = AVCTP_W2_SEND_RESPONSE; 93 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 94 return ERROR_CODE_SUCCESS; 95 } 96 97 static avrcp_connection_t * get_avrcp_connection_for_browsing_cid(uint16_t browsing_cid, avrcp_context_t * context){ 98 btstack_linked_list_iterator_t it; 99 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 100 while (btstack_linked_list_iterator_has_next(&it)){ 101 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 102 if (connection->avrcp_browsing_cid != browsing_cid) continue; 103 return connection; 104 } 105 return NULL; 106 } 107 108 static avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(uint16_t browsing_l2cap_cid, avrcp_context_t * context){ 109 btstack_linked_list_iterator_t it; 110 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 111 while (btstack_linked_list_iterator_has_next(&it)){ 112 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 113 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 114 return connection; 115 } 116 return NULL; 117 } 118 119 static avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(uint16_t l2cap_cid, avrcp_context_t * context){ 120 btstack_linked_list_iterator_t it; 121 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &context->connections); 122 while (btstack_linked_list_iterator_has_next(&it)){ 123 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 124 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 125 return connection->browsing_connection; 126 } 127 return NULL; 128 } 129 130 static void avrcp_browsing_target_emit_get_folder_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 131 if (!callback) return; 132 uint8_t event[10]; 133 int pos = 0; 134 event[pos++] = HCI_EVENT_AVRCP_META; 135 event[pos++] = sizeof(event) - 2; 136 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_FOLDER_ITEMS; 137 little_endian_store_16(event, pos, browsing_cid); 138 pos += 2; 139 event[pos++] = connection->scope; 140 big_endian_store_32(event, pos, connection->attr_bitmap); 141 pos += 4; 142 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 143 } 144 145 static void avrcp_browsing_target_emit_get_total_num_items(btstack_packet_handler_t callback, uint16_t browsing_cid, avrcp_browsing_connection_t * connection){ 146 if (!callback) return; 147 uint8_t event[10]; 148 int pos = 0; 149 event[pos++] = HCI_EVENT_AVRCP_META; 150 event[pos++] = sizeof(event) - 2; 151 event[pos++] = AVRCP_SUBEVENT_BROWSING_GET_TOTAL_NUM_ITEMS; 152 little_endian_store_16(event, pos, browsing_cid); 153 pos += 2; 154 event[pos++] = connection->scope; 155 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 156 } 157 158 static void avrcp_emit_browsing_connection_established(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 159 if (!callback) return; 160 uint8_t event[12]; 161 int pos = 0; 162 event[pos++] = HCI_EVENT_AVRCP_META; 163 event[pos++] = sizeof(event) - 2; 164 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 165 event[pos++] = status; 166 reverse_bd_addr(addr,&event[pos]); 167 pos += 6; 168 little_endian_store_16(event, pos, browsing_cid); 169 pos += 2; 170 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 171 } 172 173 static void avrcp_emit_incoming_browsing_connection(btstack_packet_handler_t callback, uint16_t browsing_cid, bd_addr_t addr){ 174 if (!callback) return; 175 uint8_t event[11]; 176 int pos = 0; 177 event[pos++] = HCI_EVENT_AVRCP_META; 178 event[pos++] = sizeof(event) - 2; 179 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 180 reverse_bd_addr(addr,&event[pos]); 181 pos += 6; 182 little_endian_store_16(event, pos, browsing_cid); 183 pos += 2; 184 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 185 } 186 187 static void avrcp_emit_browsing_connection_closed(btstack_packet_handler_t callback, uint16_t browsing_cid){ 188 if (!callback) return; 189 uint8_t event[5]; 190 int pos = 0; 191 event[pos++] = HCI_EVENT_AVRCP_META; 192 event[pos++] = sizeof(event) - 2; 193 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 194 little_endian_store_16(event, pos, browsing_cid); 195 pos += 2; 196 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 197 } 198 199 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 200 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 201 memset(connection, 0, sizeof(avrcp_browsing_connection_t)); 202 connection->state = AVCTP_CONNECTION_IDLE; 203 connection->transaction_label = 0xFF; 204 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(); 205 avrcp_connection->browsing_connection = connection; 206 return connection; 207 } 208 209 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){ 210 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr(remote_addr, context); 211 212 if (!avrcp_connection){ 213 log_error("avrcp: there is no previously established AVRCP controller connection."); 214 return ERROR_CODE_COMMAND_DISALLOWED; 215 } 216 217 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 218 if (connection){ 219 log_error(" avrcp_browsing_connect connection exists."); 220 return ERROR_CODE_SUCCESS; 221 } 222 223 connection = avrcp_browsing_create_connection(avrcp_connection); 224 if (!connection){ 225 log_error("avrcp: could not allocate connection struct."); 226 return BTSTACK_MEMORY_ALLOC_FAILED; 227 } 228 229 if (!browsing_cid) return L2CAP_LOCAL_CID_DOES_NOT_EXIST; 230 231 *browsing_cid = avrcp_connection->avrcp_browsing_cid; 232 connection->ertm_buffer = ertm_buffer; 233 connection->ertm_buffer_size = size; 234 avrcp_connection->browsing_connection = connection; 235 236 memcpy(&connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 237 238 return l2cap_create_ertm_channel(avrcp_browsing_target_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 239 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 240 241 } 242 243 static void avrcp_browser_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_context_t * context){ 244 UNUSED(channel); 245 UNUSED(size); 246 bd_addr_t event_addr; 247 uint16_t local_cid; 248 uint8_t status; 249 avrcp_browsing_connection_t * browsing_connection = NULL; 250 avrcp_connection_t * avrcp_connection = NULL; 251 252 if (packet_type != HCI_EVENT_PACKET) return; 253 254 switch (hci_event_packet_get_type(packet)) { 255 case HCI_EVENT_DISCONNECTION_COMPLETE: 256 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, 0); 257 break; 258 case L2CAP_EVENT_INCOMING_CONNECTION: 259 l2cap_event_incoming_connection_get_address(packet, event_addr); 260 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 261 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 262 if (!avrcp_connection) { 263 log_error("No previously created AVRCP controller connections"); 264 l2cap_decline_connection(local_cid); 265 break; 266 } 267 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 268 browsing_connection->l2cap_browsing_cid = local_cid; 269 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 270 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); 271 avrcp_emit_incoming_browsing_connection(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr); 272 break; 273 274 case L2CAP_EVENT_CHANNEL_OPENED: 275 l2cap_event_channel_opened_get_address(packet, event_addr); 276 status = l2cap_event_channel_opened_get_status(packet); 277 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 278 279 avrcp_connection = get_avrcp_connection_for_bd_addr(event_addr, context); 280 if (!avrcp_connection){ 281 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 282 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 283 l2cap_disconnect(local_cid, 0); // reason isn't used 284 break; 285 } 286 287 browsing_connection = avrcp_connection->browsing_connection; 288 if (status != ERROR_CODE_SUCCESS){ 289 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 290 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, status); 291 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 292 avrcp_connection->browsing_connection = NULL; 293 break; 294 } 295 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 296 297 browsing_connection->l2cap_browsing_cid = local_cid; 298 299 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 300 browsing_connection->state = AVCTP_CONNECTION_OPENED; 301 avrcp_emit_browsing_connection_established(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 302 break; 303 304 case L2CAP_EVENT_CHANNEL_CLOSED: 305 // data: event (8), len(8), channel (16) 306 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 307 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid(local_cid, context); 308 309 if (avrcp_connection && avrcp_connection->browsing_connection){ 310 avrcp_emit_browsing_connection_closed(context->browsing_avrcp_callback, avrcp_connection->avrcp_browsing_cid); 311 // free connection 312 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 313 avrcp_connection->browsing_connection = NULL; 314 break; 315 } 316 break; 317 default: 318 break; 319 } 320 } 321 322 323 static void avrcp_browsing_target_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 324 avrcp_browsing_connection_t * browsing_connection; 325 326 switch (packet_type) { 327 case L2CAP_DATA_PACKET:{ 328 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_target_context); 329 if (!browsing_connection) break; 330 // printf_hexdump(packet,size); 331 int pos = 0; 332 uint8_t transport_header = packet[pos++]; 333 // Transaction label | Packet_type | C/R | IPID (1 == invalid profile identifier) 334 browsing_connection->transaction_label = transport_header >> 4; 335 avrcp_packet_type_t avctp_packet_type = (transport_header & 0x0F) >> 2; 336 // printf("L2CAP_DATA_PACKET, transaction_label %d\n", browsing_connection->transaction_label); 337 switch (avctp_packet_type){ 338 case AVRCP_SINGLE_PACKET: 339 case AVRCP_START_PACKET: 340 // uint8_t frame_type = (transport_header & 0x03) >> 1; 341 // uint8_t ipid = transport_header & 0x01; 342 browsing_connection->subunit_type = packet[pos++] >> 2; 343 browsing_connection->subunit_id = 0; 344 browsing_connection->command_opcode = packet[pos++]; 345 // printf("subunit_id") 346 // pos += 2; 347 browsing_connection->num_packets = 1; 348 if (avctp_packet_type == AVRCP_START_PACKET){ 349 browsing_connection->num_packets = packet[pos++]; 350 } 351 browsing_connection->pdu_id = packet[pos++]; 352 // uint16_t length = big_endian_read_16(packet, pos); 353 // pos += 2; 354 break; 355 default: 356 break; 357 } 358 // printf("pdu id 0x%2x\n", browsing_connection->pdu_id); 359 // uint32_t i; 360 switch (avctp_packet_type){ 361 case AVRCP_SINGLE_PACKET: 362 case AVRCP_END_PACKET: 363 switch(browsing_connection->pdu_id){ 364 case AVRCP_PDU_ID_GET_FOLDER_ITEMS: 365 printf("\n"); 366 browsing_connection->scope = packet[pos++]; 367 browsing_connection->start_item = big_endian_read_32(packet, pos); 368 pos += 4; 369 browsing_connection->end_item = big_endian_read_32(packet, pos); 370 pos += 4; 371 uint8_t attr_count = packet[pos++]; 372 373 while (attr_count){ 374 uint32_t attr_id = big_endian_read_32(packet, pos); 375 pos += 4; 376 browsing_connection->attr_bitmap |= (1 << attr_id); 377 attr_count--; 378 } 379 avrcp_browsing_target_emit_get_folder_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 380 break; 381 case AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS:{ 382 // send total num items 383 browsing_connection->scope = packet[pos++]; 384 avrcp_browsing_target_emit_get_total_num_items(avrcp_target_context.browsing_avrcp_callback, channel, browsing_connection); 385 // uint32_t num_items = big_endian_read_32(packet, pos); 386 // pos += 4; 387 break; 388 } 389 default: 390 // printf("send avrcp_browsing_target_response_general_reject\n"); 391 avrcp_browsing_target_response_general_reject(browsing_connection, AVRCP_STATUS_INVALID_COMMAND); 392 log_info(" not parsed pdu ID 0x%02x", browsing_connection->pdu_id); 393 break; 394 } 395 browsing_connection->state = AVCTP_CONNECTION_OPENED; 396 // 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); 397 break; 398 default: 399 break; 400 } 401 // printf(" paket done\n"); 402 break; 403 } 404 405 case HCI_EVENT_PACKET: 406 switch (hci_event_packet_get_type(packet)){ 407 case L2CAP_EVENT_CAN_SEND_NOW: 408 browsing_connection = get_avrcp_browsing_connection_for_l2cap_cid(channel, &avrcp_target_context); 409 if (!browsing_connection) break; 410 if (browsing_connection->state != AVCTP_W2_SEND_RESPONSE) return; 411 browsing_connection->state = AVCTP_CONNECTION_OPENED; 412 avrcp_browsing_target_handle_can_send_now(browsing_connection); 413 break; 414 default: 415 avrcp_browser_packet_handler(packet_type, channel, packet, size, &avrcp_target_context); 416 break; 417 } 418 break; 419 420 default: 421 break; 422 } 423 } 424 425 void avrcp_browsing_target_init(void){ 426 avrcp_target_context.browsing_packet_handler = avrcp_browsing_target_packet_handler; 427 l2cap_register_service(&avrcp_browsing_target_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 428 } 429 430 void avrcp_browsing_target_register_packet_handler(btstack_packet_handler_t callback){ 431 if (callback == NULL){ 432 log_error("avrcp_browsing_target_register_packet_handler called with NULL callback"); 433 return; 434 } 435 avrcp_target_context.browsing_avrcp_callback = callback; 436 } 437 438 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){ 439 return avrcp_browsing_connect(bd_addr, &avrcp_target_context, ertm_buffer, size, ertm_config, avrcp_browsing_cid); 440 } 441 442 uint8_t avrcp_browsing_target_disconnect(uint16_t avrcp_browsing_cid){ 443 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 444 if (!avrcp_connection){ 445 log_error("avrcp_browsing_target_disconnect: could not find a connection."); 446 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 447 } 448 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 449 450 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 451 return ERROR_CODE_SUCCESS; 452 } 453 454 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){ 455 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 456 if (!avrcp_connection){ 457 log_error("avrcp_browsing_decline_incoming_connection: could not find a connection."); 458 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 459 } 460 if (!avrcp_connection->browsing_connection){ 461 log_error("avrcp_browsing_decline_incoming_connection: no browsing connection."); 462 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 463 } 464 465 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 466 log_error("avrcp_browsing_decline_incoming_connection: browsing connection in a wrong state."); 467 return ERROR_CODE_COMMAND_DISALLOWED; 468 } 469 470 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 471 avrcp_connection->browsing_connection->ertm_buffer = ertm_buffer; 472 avrcp_connection->browsing_connection->ertm_buffer_size = size; 473 memcpy(&avrcp_connection->browsing_connection->ertm_config, ertm_config, sizeof(l2cap_ertm_config_t)); 474 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); 475 return ERROR_CODE_SUCCESS; 476 } 477 478 uint8_t avrcp_browsing_target_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 479 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 480 if (!avrcp_connection){ 481 log_error("avrcp_browsing_decline_incoming_connection: could not find a connection."); 482 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 483 } 484 if (!avrcp_connection->browsing_connection) return ERROR_CODE_SUCCESS; 485 if (avrcp_connection->browsing_connection->state > AVCTP_CONNECTION_W4_ERTM_CONFIGURATION) return ERROR_CODE_COMMAND_DISALLOWED; 486 487 l2cap_decline_connection(avrcp_connection->browsing_connection->l2cap_browsing_cid); 488 // free connection 489 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 490 avrcp_connection->browsing_connection = NULL; 491 return ERROR_CODE_SUCCESS; 492 } 493 494 uint8_t avrcp_subevent_browsing_get_folder_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint8_t * attr_list, uint16_t attr_list_size){ 495 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 496 if (!avrcp_connection){ 497 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 498 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 499 } 500 501 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 502 if (!connection){ 503 log_info("avrcp_subevent_browsing_get_folder_items_response: could not find a connection."); 504 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 505 } 506 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 507 508 if (connection->state != AVCTP_CONNECTION_OPENED) { 509 log_info("avrcp_subevent_browsing_get_folder_items_response: wrong state."); 510 return ERROR_CODE_COMMAND_DISALLOWED; 511 } 512 int pos = 0; 513 514 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_FOLDER_ITEMS; 515 big_endian_store_16(connection->cmd_operands, pos, attr_list_size); 516 pos += 2; 517 518 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 519 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 520 pos += 2; 521 522 // TODO: fragmentation 523 if (attr_list_size > sizeof(connection->cmd_operands)){ 524 connection->attr_list = attr_list; 525 connection->attr_list_size = attr_list_size; 526 log_info(" todo: list too big, invoke fragmentation"); 527 return 1; 528 } 529 memcpy(&connection->cmd_operands[pos], attr_list, attr_list_size); 530 pos += attr_list_size; 531 connection->cmd_operands_length = pos; 532 // printf_hexdump(connection->cmd_operands, connection->cmd_operands_length); 533 534 connection->state = AVCTP_W2_SEND_RESPONSE; 535 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 536 return ERROR_CODE_SUCCESS; 537 } 538 539 540 uint8_t avrcp_subevent_browsing_get_total_num_items_response(uint16_t avrcp_browsing_cid, uint16_t uid_counter, uint32_t total_num_items){ 541 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid(avrcp_browsing_cid, &avrcp_target_context); 542 if (!avrcp_connection){ 543 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 544 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 545 } 546 547 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 548 if (!connection){ 549 log_info("avrcp_subevent_browsing_get_folder_items_response: could not find a connection."); 550 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 551 } 552 if (connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 553 554 if (connection->state != AVCTP_CONNECTION_OPENED) { 555 log_info("avrcp_subevent_browsing_get_folder_items_response: wrong state."); 556 return ERROR_CODE_COMMAND_DISALLOWED; 557 } 558 559 int pos = 0; 560 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GET_TOTAL_NUMBER_OF_ITEMS; 561 big_endian_store_16(connection->cmd_operands, pos, 7); 562 pos += 2; 563 connection->cmd_operands[pos++] = AVRCP_STATUS_SUCCESS; 564 big_endian_store_16(connection->cmd_operands, pos, uid_counter); 565 pos += 2; 566 big_endian_store_32(connection->cmd_operands, pos, total_num_items); 567 pos += 4; 568 connection->cmd_operands_length = pos; 569 // printf_hexdump(connection->cmd_operands, connection->cmd_operands_length); 570 571 connection->state = AVCTP_W2_SEND_RESPONSE; 572 avrcp_browsing_target_request_can_send_now(connection, connection->l2cap_browsing_cid); 573 return ERROR_CODE_SUCCESS; 574 } 575 576 577 578 /* 579 int pos = 0; 580 connection->cmd_operands[pos++] = AVRCP_PDU_ID_GENERAL_REJECT; 581 // connection->cmd_operands[pos++] = 0; 582 // param length 583 big_endian_store_16(connection->cmd_operands, pos, 1); 584 pos += 2; 585 connection->cmd_operands[pos++] = status; 586 connection->cmd_operands_length = 4; 587 connection->state = AVCTP_W2_SEND_RESPONSE; 588 */ 589 590