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.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 43 #include "bluetooth_psm.h" 44 #include "bluetooth_sdp.h" 45 #include "btstack_debug.h" 46 #include "btstack_event.h" 47 #include "btstack_memory.h" 48 #include "classic/sdp_client.h" 49 #include "classic/sdp_util.h" 50 #include "classic/avrcp_browsing.h" 51 52 53 static void avrcp_browsing_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 54 55 static btstack_packet_handler_t avrcp_browsing_callback; 56 57 static btstack_linked_list_t connections; 58 59 static bool l2cap_browsing_service_registered = false; 60 static btstack_packet_handler_t avrcp_browsing_controller_packet_handler; 61 static btstack_packet_handler_t avrcp_browsing_target_packet_handler; 62 63 64 avrcp_connection_t * get_avrcp_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 65 btstack_linked_list_iterator_t it; 66 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 67 while (btstack_linked_list_iterator_has_next(&it)){ 68 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 69 if (connection->role != role) continue; 70 if (connection->avrcp_browsing_cid != browsing_cid) continue; 71 return connection; 72 } 73 return NULL; 74 } 75 76 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 77 btstack_linked_list_iterator_t it; 78 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &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->role != role) continue; 82 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 83 return connection; 84 } 85 return NULL; 86 } 87 88 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 89 btstack_linked_list_iterator_t it; 90 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 91 while (btstack_linked_list_iterator_has_next(&it)){ 92 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 93 if (connection->role != role) continue; 94 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 95 return connection->browsing_connection; 96 } 97 return NULL; 98 } 99 100 void avrcp_browsing_request_can_send_now(avrcp_browsing_connection_t * connection, uint16_t l2cap_cid){ 101 connection->wait_to_send = true; 102 l2cap_request_can_send_now_event(l2cap_cid); 103 } 104 105 static void avrcp_reconnect_timer_timeout_handler(btstack_timer_source_t * timer){ 106 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 107 avrcp_connection_t * connection_controller = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 108 if (connection_controller == NULL) return; 109 avrcp_connection_t * connection_target = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 110 if (connection_target == NULL) return; 111 112 if ((connection_controller->browsing_connection == NULL) || (connection_target->browsing_connection == NULL)) return; 113 114 if (connection_controller->browsing_connection->state == AVCTP_CONNECTION_W2_L2CAP_RECONNECT){ 115 connection_controller->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 116 connection_target->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 117 118 l2cap_create_ertm_channel(avrcp_browsing_packet_handler, connection_controller->remote_addr, connection_controller->browsing_l2cap_psm, 119 &connection_controller->browsing_connection->ertm_config, 120 connection_controller->browsing_connection->ertm_buffer, 121 connection_controller->browsing_connection->ertm_buffer_size, NULL); 122 } 123 } 124 125 static void avrcp_reconnect_timer_start(avrcp_connection_t * connection){ 126 btstack_run_loop_set_timer_handler(&connection->reconnect_timer, avrcp_reconnect_timer_timeout_handler); 127 btstack_run_loop_set_timer_context(&connection->reconnect_timer, (void *)(uintptr_t)connection->avrcp_cid); 128 129 // add some jitter/randomness to reconnect delay 130 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 131 btstack_run_loop_set_timer(&connection->reconnect_timer, timeout); 132 133 btstack_run_loop_add_timer(&connection->reconnect_timer); 134 } 135 136 // AVRCP Browsing Service functions 137 static void avrcp_browsing_finalize_connection(avrcp_connection_t * connection){ 138 btstack_run_loop_remove_timer(&connection->reconnect_timer); 139 btstack_memory_avrcp_browsing_connection_free(connection->browsing_connection); 140 connection->browsing_connection = NULL; 141 } 142 143 static void avrcp_browsing_emit_connection_established(uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 144 btstack_assert(avrcp_browsing_callback != NULL); 145 146 uint8_t event[12]; 147 int pos = 0; 148 event[pos++] = HCI_EVENT_AVRCP_META; 149 event[pos++] = sizeof(event) - 2; 150 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 151 event[pos++] = status; 152 reverse_bd_addr(addr,&event[pos]); 153 pos += 6; 154 little_endian_store_16(event, pos, browsing_cid); 155 pos += 2; 156 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 157 } 158 159 static void avrcp_browsing_emit_incoming_connection(uint16_t browsing_cid, bd_addr_t addr){ 160 btstack_assert(avrcp_browsing_callback != NULL); 161 162 uint8_t event[11]; 163 int pos = 0; 164 event[pos++] = HCI_EVENT_AVRCP_META; 165 event[pos++] = sizeof(event) - 2; 166 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 167 reverse_bd_addr(addr,&event[pos]); 168 pos += 6; 169 little_endian_store_16(event, pos, browsing_cid); 170 pos += 2; 171 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 172 } 173 174 static void avrcp_browsing_emit_connection_closed(uint16_t browsing_cid){ 175 btstack_assert(avrcp_browsing_callback != NULL); 176 177 uint8_t event[5]; 178 int pos = 0; 179 event[pos++] = HCI_EVENT_AVRCP_META; 180 event[pos++] = sizeof(event) - 2; 181 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 182 little_endian_store_16(event, pos, browsing_cid); 183 pos += 2; 184 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 185 } 186 187 188 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection, uint16_t avrcp_browsing_cid){ 189 avrcp_browsing_connection_t * browsing_connection = btstack_memory_avrcp_browsing_connection_get(); 190 if (!browsing_connection){ 191 log_error("Not enough memory to create browsing connection"); 192 return NULL; 193 } 194 browsing_connection->state = AVCTP_CONNECTION_IDLE; 195 browsing_connection->transaction_label = 0xFF; 196 197 avrcp_connection->avrcp_browsing_cid = avrcp_browsing_cid; 198 avrcp_connection->browsing_connection = browsing_connection; 199 200 log_info("avrcp_browsing_create_connection, avrcp cid 0x%02x", avrcp_connection->avrcp_browsing_cid); 201 return browsing_connection; 202 } 203 204 static void avrcp_browsing_configure_ertm(avrcp_browsing_connection_t * browsing_connection, uint8_t * ertm_buffer, uint32_t ertm_buffer_size, l2cap_ertm_config_t * ertm_config){ 205 browsing_connection->ertm_buffer = ertm_buffer; 206 browsing_connection->ertm_buffer_size = ertm_buffer_size; 207 208 if (ertm_buffer_size > 0) { 209 (void)memcpy(&browsing_connection->ertm_config, ertm_config, 210 sizeof(l2cap_ertm_config_t)); 211 log_info("avrcp_browsing_configure_ertm"); 212 } 213 } 214 215 static avrcp_browsing_connection_t * avrcp_browsing_handle_incoming_connection(avrcp_connection_t * connection, uint16_t local_cid, uint16_t avrcp_browsing_cid){ 216 if (connection->browsing_connection == NULL){ 217 avrcp_browsing_create_connection(connection, avrcp_browsing_cid); 218 } 219 if (connection->browsing_connection) { 220 connection->browsing_connection->l2cap_browsing_cid = local_cid; 221 connection->browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 222 btstack_run_loop_remove_timer(&connection->reconnect_timer); 223 } 224 return connection->browsing_connection; 225 } 226 227 static void avrcp_browsing_handle_open_connection_for_role(avrcp_connection_t * connection, uint16_t local_cid){ 228 connection->browsing_connection->l2cap_browsing_cid = local_cid; 229 connection->browsing_connection->incoming_declined = false; 230 connection->browsing_connection->state = AVCTP_CONNECTION_OPENED; 231 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing_avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d", connection->avrcp_cid, connection->l2cap_signaling_cid, connection->role); 232 } 233 234 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 235 return (avrcp_frame_type_t)((header & 0x02) >> 1); 236 } 237 238 static void avrcp_browsing_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 239 UNUSED(channel); 240 UNUSED(size); 241 bd_addr_t event_addr; 242 uint16_t local_cid; 243 uint8_t status; 244 bool decline_connection; 245 bool outoing_active; 246 247 avrcp_connection_t * connection_controller; 248 avrcp_connection_t * connection_target; 249 250 switch (packet_type){ 251 case L2CAP_DATA_PACKET: 252 switch (avrcp_get_frame_type(packet[0])){ 253 case AVRCP_RESPONSE_FRAME: 254 (*avrcp_browsing_controller_packet_handler)(packet_type, channel, packet, size); 255 break; 256 case AVRCP_COMMAND_FRAME: 257 default: // make compiler happy 258 (*avrcp_browsing_target_packet_handler)(packet_type, channel, packet, size); 259 break; 260 } 261 break; 262 case HCI_EVENT_PACKET: 263 btstack_assert(avrcp_browsing_controller_packet_handler != NULL); 264 btstack_assert(avrcp_browsing_target_packet_handler != NULL); 265 266 switch (hci_event_packet_get_type(packet)) { 267 268 case L2CAP_EVENT_INCOMING_CONNECTION: 269 btstack_assert(avrcp_browsing_controller_packet_handler != NULL); 270 btstack_assert(avrcp_browsing_target_packet_handler != NULL); 271 272 l2cap_event_incoming_connection_get_address(packet, event_addr); 273 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 274 outoing_active = false; 275 276 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 277 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 278 279 if (connection_target == NULL || connection_controller == NULL) { 280 l2cap_decline_connection(local_cid); 281 return; 282 } 283 284 if (connection_target->browsing_connection != NULL){ 285 if (connection_target->browsing_connection->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 286 outoing_active = true; 287 connection_target->browsing_connection->incoming_declined = true; 288 } 289 } 290 291 if (connection_controller->browsing_connection != NULL){ 292 if (connection_controller->browsing_connection->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 293 outoing_active = true; 294 connection_controller->browsing_connection->incoming_declined = true; 295 } 296 } 297 298 decline_connection = outoing_active; 299 if (decline_connection == false){ 300 uint16_t avrcp_browsing_cid; 301 if ((connection_controller->browsing_connection == NULL) || (connection_target->browsing_connection == NULL)){ 302 avrcp_browsing_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 303 } else { 304 avrcp_browsing_cid = connection_controller->avrcp_browsing_cid; 305 } 306 307 // create two connection objects (both) 308 connection_target->browsing_connection = avrcp_browsing_handle_incoming_connection(connection_target, local_cid, avrcp_browsing_cid); 309 connection_controller->browsing_connection = avrcp_browsing_handle_incoming_connection(connection_controller, local_cid, avrcp_browsing_cid); 310 311 if ((connection_target->browsing_connection == NULL) || (connection_controller->browsing_connection == NULL)){ 312 decline_connection = true; 313 if (connection_target->browsing_connection) { 314 avrcp_browsing_finalize_connection(connection_target); 315 } 316 if (connection_controller->browsing_connection) { 317 avrcp_browsing_finalize_connection(connection_controller); 318 } 319 } 320 } 321 if (decline_connection){ 322 l2cap_decline_connection(local_cid); 323 } else { 324 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION browsing_avrcp_cid 0x%02x", connection_controller->avrcp_browsing_cid); 325 avrcp_browsing_emit_incoming_connection(connection_controller->avrcp_browsing_cid, event_addr); 326 } 327 break; 328 329 case L2CAP_EVENT_CHANNEL_OPENED: 330 l2cap_event_channel_opened_get_address(packet, event_addr); 331 status = l2cap_event_channel_opened_get_status(packet); 332 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 333 334 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 335 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 336 337 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 338 // outgoing: structs are cteated in avrcp_connect() and avrcp_browsing_connect() 339 if ((connection_controller == NULL) || (connection_target == NULL)) { 340 break; 341 } 342 if ((connection_controller->browsing_connection == NULL) || (connection_target->browsing_connection == NULL)) { 343 break; 344 } 345 346 switch (status){ 347 case ERROR_CODE_SUCCESS: 348 avrcp_browsing_handle_open_connection_for_role(connection_target, local_cid); 349 avrcp_browsing_handle_open_connection_for_role(connection_controller, local_cid); 350 avrcp_browsing_emit_connection_established(connection_controller->avrcp_browsing_cid, event_addr, status); 351 return; 352 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 353 if (connection_controller->browsing_connection->incoming_declined == true){ 354 log_info("Incoming browsing connection was declined, and the outgoing failed"); 355 connection_controller->browsing_connection->state = AVCTP_CONNECTION_W2_L2CAP_RECONNECT; 356 connection_controller->browsing_connection->incoming_declined = false; 357 connection_target->browsing_connection->state = AVCTP_CONNECTION_W2_L2CAP_RECONNECT; 358 connection_target->browsing_connection->incoming_declined = false; 359 avrcp_reconnect_timer_start(connection_controller); 360 return; 361 } 362 break; 363 default: 364 break; 365 } 366 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 367 avrcp_browsing_emit_connection_established(connection_controller->avrcp_browsing_cid, event_addr, status); 368 avrcp_browsing_finalize_connection(connection_controller); 369 avrcp_browsing_finalize_connection(connection_target); 370 break; 371 372 case L2CAP_EVENT_CHANNEL_CLOSED: 373 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 374 375 connection_controller = get_avrcp_connection_for_browsing_l2cap_cid_for_role(AVRCP_CONTROLLER, local_cid); 376 connection_target = get_avrcp_connection_for_browsing_l2cap_cid_for_role(AVRCP_TARGET, local_cid); 377 if ((connection_controller == NULL) || (connection_target == NULL)) { 378 break; 379 } 380 if ((connection_controller->browsing_connection == NULL) || (connection_target->browsing_connection == NULL)) { 381 break; 382 } 383 avrcp_browsing_emit_connection_closed(connection_controller->avrcp_browsing_cid); 384 avrcp_browsing_finalize_connection(connection_controller); 385 avrcp_browsing_finalize_connection(connection_target); 386 break; 387 388 case L2CAP_EVENT_CAN_SEND_NOW: 389 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 390 connection_target = get_avrcp_connection_for_browsing_l2cap_cid_for_role(AVRCP_TARGET, local_cid); 391 if ((connection_target != NULL) && (connection_target->browsing_connection != NULL) && connection_target->browsing_connection->wait_to_send) { 392 connection_target->browsing_connection->wait_to_send = false; 393 (*avrcp_browsing_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 394 break; 395 } 396 connection_controller = get_avrcp_connection_for_browsing_l2cap_cid_for_role(AVRCP_CONTROLLER, local_cid); 397 if ((connection_controller != NULL) && (connection_controller->browsing_connection != NULL) && connection_controller->browsing_connection->wait_to_send) { 398 connection_controller->browsing_connection->wait_to_send = false; 399 (*avrcp_browsing_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 400 break; 401 } 402 break; 403 404 default: 405 break; 406 } 407 break; 408 default: 409 break; 410 } 411 412 } 413 414 void avrcp_browsing_init(void){ 415 if (l2cap_browsing_service_registered) return; 416 int status = l2cap_register_service(&avrcp_browsing_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 417 418 if (status != ERROR_CODE_SUCCESS) return; 419 l2cap_browsing_service_registered = true; 420 } 421 422 423 uint8_t avrcp_browsing_connect(bd_addr_t remote_addr, uint8_t * ertm_buffer, uint32_t ertm_buffer_size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){ 424 btstack_assert(avrcp_browsing_controller_packet_handler != NULL); 425 btstack_assert(avrcp_browsing_target_packet_handler != NULL); 426 427 avrcp_connection_t * connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 428 if (!connection_controller){ 429 return ERROR_CODE_COMMAND_DISALLOWED; 430 } 431 avrcp_connection_t * connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 432 if (!connection_target){ 433 return ERROR_CODE_COMMAND_DISALLOWED; 434 } 435 436 if (connection_controller->browsing_connection){ 437 return ERROR_CODE_COMMAND_DISALLOWED; 438 } 439 if (connection_target->browsing_connection){ 440 return ERROR_CODE_COMMAND_DISALLOWED; 441 } 442 443 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 444 445 connection_controller->browsing_connection = avrcp_browsing_create_connection(connection_controller, cid); 446 if (!connection_controller->browsing_connection) return BTSTACK_MEMORY_ALLOC_FAILED; 447 448 connection_target->browsing_connection = avrcp_browsing_create_connection(connection_target, cid); 449 if (!connection_target->browsing_connection){ 450 avrcp_browsing_finalize_connection(connection_controller); 451 return BTSTACK_MEMORY_ALLOC_FAILED; 452 } 453 avrcp_browsing_configure_ertm(connection_controller->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 454 avrcp_browsing_configure_ertm(connection_target->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 455 456 if (avrcp_browsing_cid != NULL){ 457 *avrcp_browsing_cid = cid; 458 } 459 460 connection_controller->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 461 connection_target->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 462 463 return l2cap_create_ertm_channel(avrcp_browsing_packet_handler, remote_addr, connection_controller->browsing_l2cap_psm, 464 &connection_controller->browsing_connection->ertm_config, 465 connection_controller->browsing_connection->ertm_buffer, 466 connection_controller->browsing_connection->ertm_buffer_size, NULL); 467 468 } 469 470 uint8_t avrcp_browsing_configure_incoming_connection(uint16_t avrcp_browsing_cid, uint8_t * ertm_buffer, uint32_t ertm_buffer_size, l2cap_ertm_config_t * ertm_config){ 471 avrcp_connection_t * connection_controller = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_CONTROLLER, avrcp_browsing_cid); 472 if (!connection_controller){ 473 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 474 } 475 avrcp_connection_t * connection_target = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 476 if (!connection_target){ 477 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 478 } 479 480 if (!connection_controller->browsing_connection){ 481 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 482 } 483 if (!connection_target->browsing_connection){ 484 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 485 } 486 487 if (connection_controller->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 488 return ERROR_CODE_COMMAND_DISALLOWED; 489 } 490 491 avrcp_browsing_configure_ertm(connection_controller->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 492 avrcp_browsing_configure_ertm(connection_target->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 493 494 connection_controller->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 495 connection_target->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 496 497 l2cap_accept_ertm_connection(connection_controller->browsing_connection->l2cap_browsing_cid, 498 &connection_controller->browsing_connection->ertm_config, 499 connection_controller->browsing_connection->ertm_buffer, 500 connection_controller->browsing_connection->ertm_buffer_size); 501 return ERROR_CODE_SUCCESS; 502 } 503 504 505 uint8_t avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 506 avrcp_connection_t * connection_controller = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_CONTROLLER, avrcp_browsing_cid); 507 if (!connection_controller){ 508 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 509 } 510 avrcp_connection_t * connection_target = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 511 if (!connection_target){ 512 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 513 } 514 515 if (!connection_controller->browsing_connection){ 516 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 517 } 518 if (!connection_target->browsing_connection){ 519 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 520 } 521 522 if (connection_controller->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 523 return ERROR_CODE_COMMAND_DISALLOWED; 524 } 525 526 l2cap_decline_connection(connection_controller->browsing_connection->l2cap_browsing_cid); 527 528 avrcp_browsing_finalize_connection(connection_controller); 529 avrcp_browsing_finalize_connection(connection_target); 530 return ERROR_CODE_SUCCESS; 531 } 532 533 uint8_t avrcp_browsing_disconnect(uint16_t avrcp_browsing_cid){ 534 avrcp_connection_t * connection_controller = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_CONTROLLER, avrcp_browsing_cid); 535 if (!connection_controller){ 536 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 537 } 538 avrcp_connection_t * connection_target = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 539 if (!connection_target){ 540 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 541 } 542 543 if (!connection_controller->browsing_connection){ 544 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 545 } 546 if (!connection_target->browsing_connection){ 547 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 548 } 549 550 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid, 0); 551 return ERROR_CODE_SUCCESS; 552 } 553 554 void avrcp_browsing_register_controller_packet_handler(btstack_packet_handler_t callback){ 555 avrcp_browsing_controller_packet_handler = callback; 556 } 557 558 void avrcp_browsing_register_target_packet_handler(btstack_packet_handler_t callback){ 559 avrcp_browsing_target_packet_handler = callback; 560 } 561 562 void avrcp_browsing_register_packet_handler(btstack_packet_handler_t callback){ 563 btstack_assert(callback != NULL); 564 avrcp_browsing_callback = callback; 565 }