1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 // snprintf 43 #include <stdio.h> 44 45 #include "bluetooth_psm.h" 46 #include "bluetooth_sdp.h" 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "btstack_memory.h" 50 #include "classic/sdp_client.h" 51 #include "classic/sdp_util.h" 52 #include "classic/avrcp.h" 53 54 55 typedef struct { 56 uint8_t parse_sdp_record; 57 uint32_t record_id; 58 uint16_t avrcp_cid; 59 uint16_t avrcp_l2cap_psm; 60 uint16_t avrcp_version; 61 62 uint16_t browsing_l2cap_psm; 63 uint16_t browsing_version; 64 } avrcp_sdp_query_context_t; 65 66 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 static const char * avrcp_default_controller_service_name = "BTstack AVRCP Controller Service"; 69 static const char * avrcp_default_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 70 static const char * avrcp_defaul_target_service_name = "BTstack AVRCP Target Service"; 71 static const char * avrcp_default_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 72 73 static const char * avrcp_subunit_type_name[] = { 74 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 75 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 76 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 77 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 78 }; 79 80 // default subunit info: single PANEL subunit 81 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 82 83 // globals 84 static bool avrcp_l2cap_service_registered = false; 85 86 // connections 87 static uint16_t avrcp_cid_counter; 88 static btstack_linked_list_t avrcp_connections; 89 90 // higher layer callbacks 91 static btstack_packet_handler_t avrcp_callback; 92 static btstack_packet_handler_t avrcp_controller_packet_handler; 93 static btstack_packet_handler_t avrcp_target_packet_handler; 94 95 // sdp query 96 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 97 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 98 static uint8_t avrcp_sdp_query_attribute_value[45]; 99 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 100 101 102 const char * avrcp_subunit2str(uint16_t index){ 103 if (index <= 11) return avrcp_subunit_type_name[index]; 104 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 105 return avrcp_subunit_type_name[16]; 106 } 107 108 static const char * avrcp_event_name[] = { 109 "ERROR", "PLAYBACK_STATUS_CHANGED", 110 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 111 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 112 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 113 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 114 }; 115 const char * avrcp_event2str(uint16_t index){ 116 if (index <= 0x0d) return avrcp_event_name[index]; 117 return avrcp_event_name[0]; 118 } 119 120 static const char * avrcp_operation_name[] = { 121 "SKIP", NULL, NULL, NULL, NULL, 122 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 123 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 124 }; 125 126 const char * avrcp_operation2str(uint8_t operation_id){ 127 char * name = NULL; 128 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 129 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 130 } 131 if (name == NULL){ 132 static char buffer[13]; 133 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 134 buffer[sizeof(buffer)-1] = 0; 135 return buffer; 136 } else { 137 return name; 138 } 139 } 140 141 static const char * avrcp_media_attribute_id_name[] = { 142 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 143 }; 144 const char * avrcp_attribute2str(uint8_t index){ 145 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 146 return avrcp_media_attribute_id_name[0]; 147 } 148 149 static const char * avrcp_play_status_name[] = { 150 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 151 "ERROR" // 0xFF 152 }; 153 const char * avrcp_play_status2str(uint8_t index){ 154 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 155 return avrcp_play_status_name[5]; 156 } 157 158 static const char * avrcp_ctype_name[] = { 159 "CONTROL", 160 "STATUS", 161 "SPECIFIC_INQUIRY", 162 "NOTIFY", 163 "GENERAL_INQUIRY", 164 "RESERVED5", 165 "RESERVED6", 166 "RESERVED7", 167 "NOT IMPLEMENTED IN REMOTE", 168 "ACCEPTED BY REMOTE", 169 "REJECTED BY REMOTE", 170 "IN_TRANSITION", 171 "IMPLEMENTED_STABLE", 172 "CHANGED_STABLE", 173 "RESERVED", 174 "INTERIM" 175 }; 176 const char * avrcp_ctype2str(uint8_t index){ 177 if (index < sizeof(avrcp_ctype_name)){ 178 return avrcp_ctype_name[index]; 179 } 180 return "NONE"; 181 } 182 183 static const char * avrcp_shuffle_mode_name[] = { 184 "SHUFFLE OFF", 185 "SHUFFLE ALL TRACKS", 186 "SHUFFLE GROUP" 187 }; 188 189 const char * avrcp_shuffle2str(uint8_t index){ 190 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 191 return "NONE"; 192 } 193 194 static const char * avrcp_repeat_mode_name[] = { 195 "REPEAT OFF", 196 "REPEAT SINGLE TRACK", 197 "REPEAT ALL TRACKS", 198 "REPEAT GROUP" 199 }; 200 201 const char * avrcp_repeat2str(uint8_t index){ 202 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 203 return "NONE"; 204 } 205 206 btstack_linked_list_t avrcp_get_connections(void){ 207 return avrcp_connections; 208 } 209 210 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 211 uint8_t cmd_opcode_index = 5; 212 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 213 return packet[cmd_opcode_index]; 214 } 215 216 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 217 const char * service_name, const char * service_provider_name){ 218 uint8_t* attribute; 219 de_create_sequence(service); 220 221 // 0x0000 "Service Record Handle" 222 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 223 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 224 225 // 0x0001 "Service Class ID List" 226 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 227 attribute = de_push_sequence(service); 228 { 229 if (controller){ 230 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 231 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 232 } else { 233 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 234 } 235 } 236 de_pop_sequence(service, attribute); 237 238 // 0x0004 "Protocol Descriptor List" 239 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 240 attribute = de_push_sequence(service); 241 { 242 uint8_t* l2cpProtocol = de_push_sequence(attribute); 243 { 244 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 245 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 246 } 247 de_pop_sequence(attribute, l2cpProtocol); 248 249 uint8_t* avctpProtocol = de_push_sequence(attribute); 250 { 251 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 252 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 253 } 254 de_pop_sequence(attribute, avctpProtocol); 255 } 256 de_pop_sequence(service, attribute); 257 258 // 0x0005 "Public Browse Group" 259 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 260 attribute = de_push_sequence(service); 261 { 262 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 263 } 264 de_pop_sequence(service, attribute); 265 266 // 0x0009 "Bluetooth Profile Descriptor List" 267 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 268 attribute = de_push_sequence(service); 269 { 270 uint8_t *avrcProfile = de_push_sequence(attribute); 271 { 272 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 273 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 274 } 275 de_pop_sequence(attribute, avrcProfile); 276 } 277 de_pop_sequence(service, attribute); 278 279 // 0x000d "Additional Bluetooth Profile Descriptor List" 280 if (browsing){ 281 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 282 attribute = de_push_sequence(service); 283 { 284 uint8_t * des = de_push_sequence(attribute); 285 { 286 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 287 { 288 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 289 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 290 } 291 de_pop_sequence(des, browsing_l2cpProtocol); 292 293 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 294 { 295 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 296 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 297 } 298 de_pop_sequence(des, browsing_avctpProtocol); 299 } 300 de_pop_sequence(attribute, des); 301 } 302 de_pop_sequence(service, attribute); 303 } 304 305 306 // 0x0100 "Service Name" 307 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 308 if (service_name){ 309 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 310 } else { 311 if (controller){ 312 de_add_data(service, DE_STRING, strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 313 } else { 314 de_add_data(service, DE_STRING, strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 315 } 316 } 317 318 // 0x0100 "Provider Name" 319 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 320 if (service_provider_name){ 321 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 322 } else { 323 if (controller){ 324 de_add_data(service, DE_STRING, strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 325 } else { 326 de_add_data(service, DE_STRING, strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 327 } 328 } 329 330 // 0x0311 "Supported Features" 331 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 332 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 333 } 334 335 static uint16_t avrcp_get_max_payload_size_for_avctp_packet_type(avrcp_connection_t * connection, avctp_packet_type_t avctp_packet_type){ 336 uint16_t max_frame_size = btstack_min(l2cap_get_remote_mtu_for_local_cid(connection->l2cap_signaling_cid), AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 337 338 switch (avctp_packet_type){ 339 case AVCTP_SINGLE_PACKET: 340 return max_frame_size - 3; 341 case AVCTP_START_PACKET: 342 return max_frame_size - 4; 343 case AVCTP_CONTINUE_PACKET: 344 case AVCTP_END_PACKET: 345 return max_frame_size - 1; 346 default: 347 btstack_assert(false); 348 return 0; 349 } 350 } 351 352 avctp_packet_type_t avrcp_get_avctp_packet_type(avrcp_connection_t * connection){ 353 if (connection->data_offset == 0){ 354 if (avrcp_get_max_payload_size_for_avctp_packet_type(connection, AVCTP_SINGLE_PACKET) >= connection->data_len){ 355 return AVCTP_SINGLE_PACKET; 356 } else { 357 return AVCTP_START_PACKET; 358 } 359 360 } else { 361 if ((connection->data_len - connection->data_offset) > avrcp_get_max_payload_size_for_avctp_packet_type(connection, AVCTP_CONTINUE_PACKET)){ 362 return AVCTP_CONTINUE_PACKET; 363 } else { 364 return AVCTP_END_PACKET; 365 } 366 } 367 } 368 369 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 370 btstack_linked_list_iterator_t it; 371 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 372 while (btstack_linked_list_iterator_has_next(&it)){ 373 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 374 if (connection->role != role) continue; 375 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 376 return connection; 377 } 378 return NULL; 379 } 380 381 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 382 btstack_linked_list_iterator_t it; 383 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 384 while (btstack_linked_list_iterator_has_next(&it)){ 385 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 386 if (connection->role != role) continue; 387 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 388 return connection; 389 } 390 return NULL; 391 } 392 393 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 394 btstack_linked_list_iterator_t it; 395 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 396 while (btstack_linked_list_iterator_has_next(&it)){ 397 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 398 if (connection->role != role) continue; 399 if (connection->avrcp_cid != avrcp_cid) continue; 400 return connection; 401 } 402 return NULL; 403 } 404 405 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 406 btstack_linked_list_iterator_t it; 407 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 408 while (btstack_linked_list_iterator_has_next(&it)){ 409 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 410 if (connection->role != role) continue; 411 if (connection->avrcp_browsing_cid != browsing_cid) continue; 412 return connection; 413 } 414 return NULL; 415 } 416 417 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 418 btstack_linked_list_iterator_t it; 419 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 420 while (btstack_linked_list_iterator_has_next(&it)){ 421 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 422 if (connection->role != role) continue; 423 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 424 return connection; 425 } 426 return NULL; 427 } 428 429 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 430 btstack_linked_list_iterator_t it; 431 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 432 while (btstack_linked_list_iterator_has_next(&it)){ 433 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 434 if (connection->role != role) continue; 435 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 436 return connection->browsing_connection; 437 } 438 return NULL; 439 } 440 441 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 442 connection->wait_to_send = true; 443 l2cap_request_can_send_now_event(l2cap_cid); 444 } 445 446 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 447 do { 448 if (avrcp_cid_counter == 0xffff) { 449 avrcp_cid_counter = 1; 450 } else { 451 avrcp_cid_counter++; 452 } 453 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 454 return avrcp_cid_counter; 455 } 456 457 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 458 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 459 if (!connection){ 460 log_error("Not enough memory to create connection for role %d", role); 461 return NULL; 462 } 463 464 connection->state = AVCTP_CONNECTION_IDLE; 465 connection->role = role; 466 467 connection->transaction_id = 0xFF; 468 connection->transaction_id_counter = 0; 469 470 connection->max_num_fragments = 0xFF; 471 472 // setup default unit / subunit info 473 connection->company_id = 0xffffff; 474 connection->unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 475 connection->subunit_info_data_size = sizeof(avrcp_default_subunit_info); 476 connection->subunit_info_data = avrcp_default_subunit_info; 477 478 log_info("avrcp_create_connection, role %d", role); 479 (void)memcpy(connection->remote_addr, remote_addr, 6); 480 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 481 return connection; 482 } 483 484 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 485 btstack_run_loop_remove_timer(&connection->retry_timer); 486 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 487 btstack_memory_avrcp_connection_free(connection); 488 } 489 490 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 491 btstack_assert(avrcp_callback != NULL); 492 493 uint8_t event[14]; 494 int pos = 0; 495 event[pos++] = HCI_EVENT_AVRCP_META; 496 event[pos++] = sizeof(event) - 2; 497 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 498 event[pos++] = status; 499 little_endian_store_16(event, pos, avrcp_cid); 500 pos += 2; 501 reverse_bd_addr(addr,&event[pos]); 502 pos += 6; 503 little_endian_store_16(event, pos, con_handle); 504 pos += 2; 505 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 506 } 507 508 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 509 btstack_assert(avrcp_callback != NULL); 510 511 uint8_t event[5]; 512 int pos = 0; 513 event[pos++] = HCI_EVENT_AVRCP_META; 514 event[pos++] = sizeof(event) - 2; 515 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 516 little_endian_store_16(event, pos, avrcp_cid); 517 pos += 2; 518 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 519 } 520 521 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 522 return avrcp_sdp_query_context.browsing_l2cap_psm; 523 } 524 525 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 526 des_iterator_t des_list_it; 527 des_iterator_t prot_it; 528 529 // Handle new SDP record 530 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 531 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 532 avrcp_sdp_query_context.parse_sdp_record = 0; 533 // log_info("SDP Record: Nr: %d", record_id); 534 } 535 536 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 537 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 538 539 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 540 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 541 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 542 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 543 for (des_iterator_init(&des_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 544 uint8_t * element = des_iterator_get_element(&des_list_it); 545 if (de_get_element_type(element) != DE_UUID) continue; 546 uint32_t uuid = de_get_uuid32(element); 547 switch (uuid){ 548 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 549 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 550 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 551 avrcp_sdp_query_context.parse_sdp_record = 1; 552 break; 553 default: 554 break; 555 } 556 } 557 break; 558 559 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 560 if (!avrcp_sdp_query_context.parse_sdp_record) break; 561 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 562 for (des_iterator_init(&des_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 563 uint8_t *des_element; 564 uint8_t *element; 565 uint32_t uuid; 566 567 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 568 569 des_element = des_iterator_get_element(&des_list_it); 570 des_iterator_init(&prot_it, des_element); 571 element = des_iterator_get_element(&prot_it); 572 573 if (de_get_element_type(element) != DE_UUID) continue; 574 575 uuid = de_get_uuid32(element); 576 des_iterator_next(&prot_it); 577 switch (uuid){ 578 case BLUETOOTH_PROTOCOL_L2CAP: 579 if (!des_iterator_has_more(&prot_it)) continue; 580 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 581 break; 582 case BLUETOOTH_PROTOCOL_AVCTP: 583 if (!des_iterator_has_more(&prot_it)) continue; 584 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 585 break; 586 default: 587 break; 588 } 589 } 590 } 591 break; 592 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 593 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 594 if (!avrcp_sdp_query_context.parse_sdp_record) break; 595 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 596 597 des_iterator_t des_list_0_it; 598 uint8_t *element_0; 599 600 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 601 element_0 = des_iterator_get_element(&des_list_0_it); 602 603 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 604 uint8_t *des_element; 605 uint8_t *element; 606 uint32_t uuid; 607 608 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 609 610 des_element = des_iterator_get_element(&des_list_it); 611 des_iterator_init(&prot_it, des_element); 612 element = des_iterator_get_element(&prot_it); 613 614 if (de_get_element_type(element) != DE_UUID) continue; 615 616 uuid = de_get_uuid32(element); 617 des_iterator_next(&prot_it); 618 switch (uuid){ 619 case BLUETOOTH_PROTOCOL_L2CAP: 620 if (!des_iterator_has_more(&prot_it)) continue; 621 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 622 break; 623 case BLUETOOTH_PROTOCOL_AVCTP: 624 if (!des_iterator_has_more(&prot_it)) continue; 625 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 626 break; 627 default: 628 break; 629 } 630 } 631 } 632 break; 633 default: 634 break; 635 } 636 } 637 } else { 638 log_error("SDP attribute value buffer size exceeded: available %d, required %d", avrcp_sdp_query_attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 639 } 640 } 641 642 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 643 if (connection == NULL) return; 644 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 645 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 646 avrcp_finalize_connection(connection); 647 } 648 649 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection){ 650 if (connection == NULL) return; 651 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 652 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 653 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 654 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 655 } 656 657 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 658 UNUSED(packet_type); 659 UNUSED(channel); 660 UNUSED(size); 661 662 bool state_ok = true; 663 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 664 if (!avrcp_target_connection || avrcp_target_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 665 state_ok = false; 666 } 667 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 668 if (!avrcp_controller_connection || avrcp_controller_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 669 state_ok = false; 670 } 671 if (!state_ok){ 672 // something wrong, nevertheless, start next sdp query if this one is complete 673 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 674 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 675 } 676 return; 677 } 678 679 uint8_t status; 680 681 switch (hci_event_packet_get_type(packet)){ 682 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 683 avrcp_handle_sdp_client_query_attribute_value(packet); 684 return; 685 686 case SDP_EVENT_QUERY_COMPLETE: 687 status = sdp_event_query_complete_get_status(packet); 688 689 if (status != ERROR_CODE_SUCCESS){ 690 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 691 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 692 break; 693 } 694 695 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 696 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 697 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 698 break; 699 } 700 701 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection); 702 avrcp_handle_sdp_query_succeeded(avrcp_target_connection); 703 704 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 705 break; 706 707 default: 708 return; 709 } 710 711 // register the SDP Query request to check if there is another connection waiting for the query 712 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 713 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 714 } 715 716 717 static avrcp_connection_t * avrcp_handle_incoming_connection_for_role(avrcp_role_t role, avrcp_connection_t * connection, bd_addr_t event_addr, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t avrcp_cid){ 718 if (connection == NULL){ 719 connection = avrcp_create_connection(role, event_addr); 720 } 721 if (connection) { 722 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 723 connection->l2cap_signaling_cid = local_cid; 724 connection->avrcp_cid = avrcp_cid; 725 connection->con_handle = con_handle; 726 btstack_run_loop_remove_timer(&connection->retry_timer); 727 } 728 return connection; 729 } 730 731 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 732 connection->l2cap_signaling_cid = local_cid; 733 connection->l2cap_mtu = l2cap_mtu; 734 connection->con_handle = con_handle; 735 connection->incoming_declined = false; 736 connection->song_length_ms = 0xFFFFFFFF; 737 connection->song_position_ms = 0xFFFFFFFF; 738 connection->playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 739 connection->state = AVCTP_CONNECTION_OPENED; 740 741 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d, state %d", connection->avrcp_cid, connection->l2cap_signaling_cid, connection->role, connection->state); 742 } 743 744 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 745 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 746 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 747 if (connection_controller == NULL) return; 748 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 749 if (connection_target == NULL) return; 750 751 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 752 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 753 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 754 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 755 } 756 } 757 758 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 759 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 760 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 761 762 // add some jitter/randomness to reconnect delay 763 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 764 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 765 766 btstack_run_loop_add_timer(&connection->retry_timer); 767 } 768 769 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 770 return (avrcp_frame_type_t)((header & 0x02) >> 1); 771 } 772 773 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 774 UNUSED(channel); 775 UNUSED(size); 776 bd_addr_t event_addr; 777 uint16_t local_cid; 778 uint16_t l2cap_mtu; 779 uint8_t status; 780 bool decline_connection; 781 bool outoing_active; 782 hci_con_handle_t con_handle; 783 784 avrcp_connection_t * connection_controller; 785 avrcp_connection_t * connection_target; 786 bool can_send; 787 788 switch (packet_type) { 789 case HCI_EVENT_PACKET: 790 switch (hci_event_packet_get_type(packet)) { 791 792 case L2CAP_EVENT_INCOMING_CONNECTION: 793 btstack_assert(avrcp_controller_packet_handler != NULL); 794 btstack_assert(avrcp_target_packet_handler != NULL); 795 796 l2cap_event_incoming_connection_get_address(packet, event_addr); 797 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 798 con_handle = l2cap_event_incoming_connection_get_handle(packet); 799 800 outoing_active = false; 801 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 802 if (connection_target != NULL){ 803 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 804 outoing_active = true; 805 connection_target->incoming_declined = true; 806 } 807 } 808 809 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 810 if (connection_controller != NULL){ 811 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 812 outoing_active = true; 813 connection_controller->incoming_declined = true; 814 } 815 } 816 817 decline_connection = outoing_active; 818 if (decline_connection == false){ 819 uint16_t avrcp_cid; 820 if ((connection_controller == NULL) || (connection_target == NULL)){ 821 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 822 } else { 823 avrcp_cid = connection_controller->avrcp_cid; 824 } 825 // create two connection objects (both) 826 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 827 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 828 if ((connection_target == NULL) || (connection_controller == NULL)){ 829 decline_connection = true; 830 if (connection_target) { 831 avrcp_finalize_connection(connection_target); 832 } 833 if (connection_controller) { 834 avrcp_finalize_connection(connection_controller); 835 } 836 } 837 } 838 if (decline_connection){ 839 l2cap_decline_connection(local_cid); 840 } else { 841 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 842 l2cap_accept_connection(local_cid); 843 } 844 break; 845 846 case L2CAP_EVENT_CHANNEL_OPENED: 847 l2cap_event_channel_opened_get_address(packet, event_addr); 848 status = l2cap_event_channel_opened_get_status(packet); 849 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 850 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 851 con_handle = l2cap_event_channel_opened_get_handle(packet); 852 853 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 854 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 855 856 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 857 // outgoing: structs are cteated in avrcp_connect() 858 if ((connection_controller == NULL) || (connection_target == NULL)) { 859 break; 860 } 861 862 switch (status){ 863 case ERROR_CODE_SUCCESS: 864 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 865 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 866 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 867 return; 868 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 869 if (connection_controller->incoming_declined == true){ 870 log_info("Incoming connection was declined, and the outgoing failed"); 871 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 872 connection_controller->incoming_declined = false; 873 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 874 connection_target->incoming_declined = false; 875 avrcp_retry_timer_start(connection_controller); 876 return; 877 } 878 break; 879 default: 880 break; 881 } 882 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 883 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 884 avrcp_finalize_connection(connection_controller); 885 avrcp_finalize_connection(connection_target); 886 887 break; 888 889 case L2CAP_EVENT_CHANNEL_CLOSED: 890 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 891 892 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 893 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 894 if ((connection_controller == NULL) || (connection_target == NULL)) { 895 break; 896 } 897 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 898 avrcp_finalize_connection(connection_controller); 899 avrcp_finalize_connection(connection_target); 900 break; 901 902 case L2CAP_EVENT_CAN_SEND_NOW: 903 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 904 can_send = true; 905 906 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 907 if ((connection_target != NULL) && connection_target->wait_to_send){ 908 connection_target->wait_to_send = false; 909 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 910 can_send = false; 911 } 912 913 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 914 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 915 if (can_send){ 916 connection_controller->wait_to_send = false; 917 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 918 } else { 919 l2cap_request_can_send_now_event(local_cid); 920 } 921 } 922 break; 923 924 default: 925 break; 926 } 927 break; 928 929 case L2CAP_DATA_PACKET: 930 switch (avrcp_get_frame_type(packet[0])){ 931 case AVRCP_RESPONSE_FRAME: 932 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 933 break; 934 case AVRCP_COMMAND_FRAME: 935 default: // make compiler happy 936 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 937 break; 938 } 939 break; 940 941 default: 942 break; 943 } 944 } 945 946 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 947 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 948 if (!connection_controller){ 949 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 950 } 951 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 952 if (!connection_target){ 953 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 954 } 955 if (connection_controller->browsing_connection){ 956 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 957 } 958 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 959 return ERROR_CODE_SUCCESS; 960 } 961 962 static void avrcp_handle_start_sdp_client_query(void * context){ 963 UNUSED(context); 964 965 btstack_linked_list_iterator_t it; 966 btstack_linked_list_iterator_init(&it, &avrcp_connections); 967 while (btstack_linked_list_iterator_has_next(&it)){ 968 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 969 970 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 971 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 972 973 // prevent triggering SDP query twice (for each role once) 974 avrcp_connection_t * connection_with_opposite_role; 975 switch (connection->role){ 976 case AVRCP_CONTROLLER: 977 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 978 break; 979 case AVRCP_TARGET: 980 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 981 break; 982 default: 983 btstack_assert(false); 984 return; 985 } 986 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 987 988 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 989 avrcp_sdp_query_context.avrcp_version = 0; 990 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 991 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 992 return; 993 } 994 } 995 996 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 997 btstack_assert(avrcp_controller_packet_handler != NULL); 998 btstack_assert(avrcp_target_packet_handler != NULL); 999 1000 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1001 if (connection_controller){ 1002 return ERROR_CODE_COMMAND_DISALLOWED; 1003 } 1004 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1005 if (connection_target){ 1006 return ERROR_CODE_COMMAND_DISALLOWED; 1007 } 1008 1009 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1010 1011 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1012 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1013 1014 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1015 if (!connection_target){ 1016 avrcp_finalize_connection(connection_controller); 1017 return BTSTACK_MEMORY_ALLOC_FAILED; 1018 } 1019 1020 if (avrcp_cid != NULL){ 1021 *avrcp_cid = cid; 1022 } 1023 1024 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1025 connection_controller->avrcp_cid = cid; 1026 1027 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1028 connection_target->avrcp_cid = cid; 1029 1030 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1031 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1032 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1033 return ERROR_CODE_SUCCESS; 1034 } 1035 1036 void avrcp_init(void){ 1037 avrcp_connections = NULL; 1038 if (avrcp_l2cap_service_registered) return; 1039 1040 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1041 if (status != ERROR_CODE_SUCCESS) return; 1042 avrcp_l2cap_service_registered = true; 1043 } 1044 1045 void avrcp_deinit(void){ 1046 avrcp_l2cap_service_registered = false; 1047 1048 avrcp_cid_counter = 0; 1049 avrcp_connections = NULL; 1050 1051 avrcp_callback = NULL; 1052 avrcp_controller_packet_handler = NULL; 1053 avrcp_target_packet_handler = NULL; 1054 1055 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1056 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1057 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1058 } 1059 1060 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1061 avrcp_controller_packet_handler = callback; 1062 } 1063 1064 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1065 avrcp_target_packet_handler = callback; 1066 } 1067 1068 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1069 btstack_assert(callback != NULL); 1070 avrcp_callback = callback; 1071 } 1072 1073 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1074 #define FUZZ_CID 0x44 1075 #define FUZZ_CON_HANDLE 0x0001 1076 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1077 void avrcp_init_fuzz(void){ 1078 // setup avrcp connections for cid 1079 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1080 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1081 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1082 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1083 } 1084 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1085 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1086 } 1087 #endif