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.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.h" 51 #include "classic/avrcp_controller.h" 52 53 #define PSM_AVCTP_BROWSING 0x001b 54 55 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 56 static void avrcp_browsing_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 57 58 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 59 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 60 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 61 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 62 63 static uint16_t avrcp_cid_counter = 0; 64 65 static avrcp_context_t * sdp_query_context; 66 static avrcp_context_t avrcp_context; 67 68 static btstack_packet_handler_t avrcp_callback; 69 static btstack_packet_handler_t avrcp_browsing_callback; 70 71 static uint8_t attribute_value[45]; 72 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 73 74 static btstack_linked_list_t connections; 75 static btstack_packet_handler_t avrcp_controller_packet_handler; 76 static btstack_packet_handler_t avrcp_target_packet_handler; 77 static bool l2cap_service_registered = false; 78 79 static bool l2cap_browsing_service_registered = false; 80 static btstack_packet_handler_t avrcp_browsing_controller_packet_handler; 81 static btstack_packet_handler_t avrcp_browsing_target_packet_handler; 82 83 static const char * avrcp_subunit_type_name[] = { 84 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 85 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 86 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 87 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 88 }; 89 90 const char * avrcp_subunit2str(uint16_t index){ 91 if (index <= 11) return avrcp_subunit_type_name[index]; 92 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 93 return avrcp_subunit_type_name[16]; 94 } 95 96 static const char * avrcp_event_name[] = { 97 "ERROR", "PLAYBACK_STATUS_CHANGED", 98 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 99 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 100 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 101 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 102 }; 103 const char * avrcp_event2str(uint16_t index){ 104 if (index <= 0x0d) return avrcp_event_name[index]; 105 return avrcp_event_name[0]; 106 } 107 108 static const char * avrcp_operation_name[] = { 109 "NOT SUPPORTED", // 0x3B 110 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 111 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 112 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 113 }; 114 const char * avrcp_operation2str(uint8_t index){ 115 if ((index >= 0x3B) && (index <= 0x4C)) return avrcp_operation_name[index - 0x3B]; 116 return avrcp_operation_name[0]; 117 } 118 119 static const char * avrcp_media_attribute_id_name[] = { 120 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 121 }; 122 const char * avrcp_attribute2str(uint8_t index){ 123 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 124 return avrcp_media_attribute_id_name[0]; 125 } 126 127 static const char * avrcp_play_status_name[] = { 128 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 129 "ERROR" // 0xFF 130 }; 131 const char * avrcp_play_status2str(uint8_t index){ 132 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 133 return avrcp_play_status_name[5]; 134 } 135 136 static const char * avrcp_ctype_name[] = { 137 "CONTROL", 138 "STATUS", 139 "SPECIFIC_INQUIRY", 140 "NOTIFY", 141 "GENERAL_INQUIRY", 142 "RESERVED5", 143 "RESERVED6", 144 "RESERVED7", 145 "NOT IMPLEMENTED IN REMOTE", 146 "ACCEPTED BY REMOTE", 147 "REJECTED BY REMOTE", 148 "IN_TRANSITION", 149 "IMPLEMENTED_STABLE", 150 "CHANGED_STABLE", 151 "RESERVED", 152 "INTERIM" 153 }; 154 const char * avrcp_ctype2str(uint8_t index){ 155 if (index < sizeof(avrcp_ctype_name)){ 156 return avrcp_ctype_name[index]; 157 } 158 return "NONE"; 159 } 160 161 static const char * avrcp_shuffle_mode_name[] = { 162 "SHUFFLE OFF", 163 "SHUFFLE ALL TRACKS", 164 "SHUFFLE GROUP" 165 }; 166 167 const char * avrcp_shuffle2str(uint8_t index){ 168 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 169 return "NONE"; 170 } 171 172 static const char * avrcp_repeat_mode_name[] = { 173 "REPEAT OFF", 174 "REPEAT SINGLE TRACK", 175 "REPEAT ALL TRACKS", 176 "REPEAT GROUP" 177 }; 178 179 const char * avrcp_repeat2str(uint8_t index){ 180 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 181 return "NONE"; 182 } 183 184 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 185 uint8_t cmd_opcode_index = 5; 186 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 187 return packet[cmd_opcode_index]; 188 } 189 190 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 191 const char * service_name, const char * service_provider_name){ 192 uint8_t* attribute; 193 de_create_sequence(service); 194 195 // 0x0000 "Service Record Handle" 196 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 197 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 198 199 // 0x0001 "Service Class ID List" 200 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 201 attribute = de_push_sequence(service); 202 { 203 if (controller){ 204 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 205 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 206 } else { 207 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 208 } 209 } 210 de_pop_sequence(service, attribute); 211 212 // 0x0004 "Protocol Descriptor List" 213 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 214 attribute = de_push_sequence(service); 215 { 216 uint8_t* l2cpProtocol = de_push_sequence(attribute); 217 { 218 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 219 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 220 } 221 de_pop_sequence(attribute, l2cpProtocol); 222 223 uint8_t* avctpProtocol = de_push_sequence(attribute); 224 { 225 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 226 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 227 } 228 de_pop_sequence(attribute, avctpProtocol); 229 } 230 de_pop_sequence(service, attribute); 231 232 // 0x0005 "Public Browse Group" 233 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 234 attribute = de_push_sequence(service); 235 { 236 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 237 } 238 de_pop_sequence(service, attribute); 239 240 // 0x0009 "Bluetooth Profile Descriptor List" 241 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 242 attribute = de_push_sequence(service); 243 { 244 uint8_t *avrcProfile = de_push_sequence(attribute); 245 { 246 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 247 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 248 } 249 de_pop_sequence(attribute, avrcProfile); 250 } 251 de_pop_sequence(service, attribute); 252 253 // 0x000d "Additional Bluetooth Profile Descriptor List" 254 if (browsing){ 255 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 256 attribute = de_push_sequence(service); 257 { 258 uint8_t * des = de_push_sequence(attribute); 259 { 260 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 261 { 262 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 263 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 264 } 265 de_pop_sequence(des, browsing_l2cpProtocol); 266 267 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 268 { 269 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 270 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 271 } 272 de_pop_sequence(des, browsing_avctpProtocol); 273 } 274 de_pop_sequence(attribute, des); 275 } 276 de_pop_sequence(service, attribute); 277 } 278 279 280 // 0x0100 "Service Name" 281 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 282 if (service_name){ 283 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 284 } else { 285 if (controller){ 286 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 287 } else { 288 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 289 } 290 } 291 292 // 0x0100 "Provider Name" 293 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 294 if (service_provider_name){ 295 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 296 } else { 297 if (controller){ 298 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 299 } else { 300 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 301 } 302 } 303 304 // 0x0311 "Supported Features" 305 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 306 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 307 } 308 309 avrcp_connection_t * get_avrcp_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 310 btstack_linked_list_iterator_t it; 311 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 312 while (btstack_linked_list_iterator_has_next(&it)){ 313 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 314 if (connection->role != role) continue; 315 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 316 return connection; 317 } 318 return NULL; 319 } 320 321 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 322 btstack_linked_list_iterator_t it; 323 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 324 while (btstack_linked_list_iterator_has_next(&it)){ 325 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 326 if (connection->role != role) continue; 327 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 328 return connection; 329 } 330 return NULL; 331 } 332 333 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 334 btstack_linked_list_iterator_t it; 335 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 336 while (btstack_linked_list_iterator_has_next(&it)){ 337 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 338 if (connection->role != role) continue; 339 if (connection->avrcp_cid != avrcp_cid) continue; 340 return connection; 341 } 342 return NULL; 343 } 344 345 avrcp_connection_t * get_avrcp_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 346 btstack_linked_list_iterator_t it; 347 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 348 while (btstack_linked_list_iterator_has_next(&it)){ 349 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 350 if (connection->role != role) continue; 351 if (connection->avrcp_browsing_cid != browsing_cid) continue; 352 return connection; 353 } 354 return NULL; 355 } 356 357 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 358 btstack_linked_list_iterator_t it; 359 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 360 while (btstack_linked_list_iterator_has_next(&it)){ 361 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 362 if (connection->role != role) continue; 363 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 364 return connection; 365 } 366 return NULL; 367 } 368 369 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 370 btstack_linked_list_iterator_t it; 371 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &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 (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 376 return connection->browsing_connection; 377 } 378 return NULL; 379 } 380 381 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 382 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 383 connection->wait_to_send = 1; 384 l2cap_request_can_send_now_event(l2cap_cid); 385 } 386 387 void avrcp_browsing_request_can_send_now(avrcp_browsing_connection_t * connection, uint16_t l2cap_cid){ 388 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 389 connection->wait_to_send = 1; 390 l2cap_request_can_send_now_event(l2cap_cid); 391 } 392 393 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 394 do { 395 if (avrcp_cid_counter == 0xffff) { 396 avrcp_cid_counter = 1; 397 } else { 398 avrcp_cid_counter++; 399 } 400 } while (get_avrcp_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 401 return avrcp_cid_counter; 402 } 403 404 405 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 406 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 407 if (!connection){ 408 log_error("Not enough memory to create connection for role %d", role); 409 return NULL; 410 } 411 412 connection->state = AVCTP_CONNECTION_IDLE; 413 connection->role = role; 414 connection->transaction_label = 0xFF; 415 connection->max_num_fragments = 0xFF; 416 log_info("avrcp_create_connection, role %d, avrcp cid 0x%02x", role, connection->avrcp_cid); 417 (void)memcpy(connection->remote_addr, remote_addr, 6); 418 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 419 return connection; 420 } 421 422 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 423 btstack_run_loop_remove_timer(&connection->reconnect_timer); 424 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 425 btstack_memory_avrcp_connection_free(connection); 426 } 427 428 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 429 btstack_assert(avrcp_callback != NULL); 430 431 uint8_t event[12]; 432 int pos = 0; 433 event[pos++] = HCI_EVENT_AVRCP_META; 434 event[pos++] = sizeof(event) - 2; 435 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 436 event[pos++] = status; 437 reverse_bd_addr(addr,&event[pos]); 438 pos += 6; 439 little_endian_store_16(event, pos, avrcp_cid); 440 pos += 2; 441 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 442 } 443 444 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 445 btstack_assert(avrcp_callback != NULL); 446 447 uint8_t event[5]; 448 int pos = 0; 449 event[pos++] = HCI_EVENT_AVRCP_META; 450 event[pos++] = sizeof(event) - 2; 451 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 452 little_endian_store_16(event, pos, avrcp_cid); 453 pos += 2; 454 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 455 } 456 457 static void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 458 des_iterator_t des_list_it; 459 des_iterator_t prot_it; 460 461 // Handle new SDP record 462 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 463 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 464 sdp_query_context->parse_sdp_record = 0; 465 // log_info("SDP Record: Nr: %d", record_id); 466 } 467 468 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 469 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 470 471 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 472 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 473 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 474 if (de_get_element_type(attribute_value) != DE_DES) break; 475 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 476 uint8_t * element = des_iterator_get_element(&des_list_it); 477 if (de_get_element_type(element) != DE_UUID) continue; 478 uint32_t uuid = de_get_uuid32(element); 479 switch (uuid){ 480 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 481 if (sdp_query_context->role == AVRCP_CONTROLLER) { 482 sdp_query_context->parse_sdp_record = 1; 483 break; 484 } 485 break; 486 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 487 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 488 if (sdp_query_context->role == AVRCP_TARGET) { 489 sdp_query_context->parse_sdp_record = 1; 490 break; 491 } 492 break; 493 default: 494 break; 495 } 496 } 497 break; 498 499 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 500 if (!sdp_query_context->parse_sdp_record) break; 501 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 502 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 503 uint8_t *des_element; 504 uint8_t *element; 505 uint32_t uuid; 506 507 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 508 509 des_element = des_iterator_get_element(&des_list_it); 510 des_iterator_init(&prot_it, des_element); 511 element = des_iterator_get_element(&prot_it); 512 513 if (de_get_element_type(element) != DE_UUID) continue; 514 515 uuid = de_get_uuid32(element); 516 des_iterator_next(&prot_it); 517 switch (uuid){ 518 case BLUETOOTH_PROTOCOL_L2CAP: 519 if (!des_iterator_has_more(&prot_it)) continue; 520 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 521 break; 522 case BLUETOOTH_PROTOCOL_AVCTP: 523 if (!des_iterator_has_more(&prot_it)) continue; 524 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 525 break; 526 default: 527 break; 528 } 529 } 530 } 531 break; 532 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 533 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 534 if (!sdp_query_context->parse_sdp_record) break; 535 if (de_get_element_type(attribute_value) != DE_DES) break; 536 537 des_iterator_t des_list_0_it; 538 uint8_t *element_0; 539 540 des_iterator_init(&des_list_0_it, attribute_value); 541 element_0 = des_iterator_get_element(&des_list_0_it); 542 543 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 544 uint8_t *des_element; 545 uint8_t *element; 546 uint32_t uuid; 547 548 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 549 550 des_element = des_iterator_get_element(&des_list_it); 551 des_iterator_init(&prot_it, des_element); 552 element = des_iterator_get_element(&prot_it); 553 554 if (de_get_element_type(element) != DE_UUID) continue; 555 556 uuid = de_get_uuid32(element); 557 des_iterator_next(&prot_it); 558 switch (uuid){ 559 case BLUETOOTH_PROTOCOL_L2CAP: 560 if (!des_iterator_has_more(&prot_it)) continue; 561 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->browsing_l2cap_psm); 562 break; 563 case BLUETOOTH_PROTOCOL_AVCTP: 564 if (!des_iterator_has_more(&prot_it)) continue; 565 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->browsing_version); 566 break; 567 default: 568 break; 569 } 570 } 571 } 572 break; 573 default: 574 break; 575 } 576 } 577 } else { 578 log_error("SDP attribute value buffer size exceeded: available %d, required %d", attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 579 } 580 } 581 582 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 583 if (connection == NULL) return; 584 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 585 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, status); 586 avrcp_finalize_connection(connection); 587 } 588 589 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection){ 590 if (connection == NULL) return; 591 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 592 connection->avrcp_l2cap_psm = sdp_query_context->avrcp_l2cap_psm; 593 connection->browsing_version = sdp_query_context->browsing_version; 594 connection->browsing_l2cap_psm = sdp_query_context->browsing_l2cap_psm; 595 } 596 597 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 598 UNUSED(packet_type); 599 UNUSED(channel); 600 UNUSED(size); 601 602 avrcp_connection_t * avrcp_target_connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, sdp_query_context->remote_addr); 603 avrcp_connection_t * avrcp_controller_connection = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, sdp_query_context->remote_addr); 604 605 uint8_t status; 606 607 switch (hci_event_packet_get_type(packet)){ 608 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 609 avrcp_handle_sdp_client_query_attribute_value(packet); 610 break; 611 612 case SDP_EVENT_QUERY_COMPLETE: 613 status = sdp_event_query_complete_get_status(packet); 614 615 if (status != ERROR_CODE_SUCCESS){ 616 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 617 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 618 break; 619 } 620 621 if (!sdp_query_context->avrcp_l2cap_psm){ 622 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 623 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 624 break; 625 } 626 627 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection); 628 avrcp_handle_sdp_query_succeeded(avrcp_target_connection); 629 630 l2cap_create_channel(&avrcp_packet_handler, sdp_query_context->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 631 break; 632 633 default: 634 break; 635 636 } 637 } 638 639 640 static avrcp_connection_t * avrcp_handle_incoming_connection_for_role(avrcp_role_t role, avrcp_connection_t * connection, bd_addr_t event_addr, uint16_t local_cid, uint16_t avrcp_cid){ 641 if (connection == NULL){ 642 connection = avrcp_create_connection(role, event_addr); 643 } 644 if (connection) { 645 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 646 connection->l2cap_signaling_cid = local_cid; 647 connection->avrcp_cid = avrcp_cid; 648 btstack_run_loop_remove_timer(&connection->reconnect_timer); 649 } 650 return connection; 651 } 652 653 static void avrcp_handle_open_connection_for_role( avrcp_connection_t * connection, uint16_t local_cid, uint16_t l2cap_mtu){ 654 connection->l2cap_signaling_cid = local_cid; 655 connection->l2cap_mtu = l2cap_mtu; 656 connection->incoming_declined = false; 657 connection->song_length_ms = 0xFFFFFFFF; 658 connection->song_position_ms = 0xFFFFFFFF; 659 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 660 connection->state = AVCTP_CONNECTION_OPENED; 661 662 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d", connection->avrcp_cid, connection->l2cap_signaling_cid, connection->role); 663 } 664 665 static void avrcp_reconnect_timer_timeout_handler(btstack_timer_source_t * timer){ 666 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 667 avrcp_connection_t * controller_connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 668 if (controller_connection == NULL) return; 669 avrcp_connection_t * target_connection = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 670 if (target_connection == NULL) return; 671 672 controller_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 673 target_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 674 675 l2cap_create_channel(&avrcp_packet_handler, controller_connection->remote_addr, controller_connection->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 676 } 677 678 static void avrcp_reconnect_timer_start(avrcp_connection_t * connection){ 679 btstack_run_loop_set_timer_handler(&connection->reconnect_timer, avrcp_reconnect_timer_timeout_handler); 680 btstack_run_loop_set_timer_context(&connection->reconnect_timer, (void *)(uintptr_t)connection->avrcp_cid); 681 682 // add some jitter/randomness to reconnect delay 683 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 684 btstack_run_loop_set_timer(&connection->reconnect_timer, timeout); 685 686 btstack_run_loop_add_timer(&connection->reconnect_timer); 687 } 688 689 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 690 return (avrcp_frame_type_t)((header & 0x02) >> 1); 691 } 692 693 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 694 UNUSED(channel); 695 UNUSED(size); 696 bd_addr_t event_addr; 697 uint16_t local_cid; 698 uint16_t l2cap_mtu; 699 uint8_t status; 700 bool decline_connection; 701 bool outoing_active; 702 703 avrcp_connection_t * connection_controller; 704 avrcp_connection_t * connection_target; 705 706 switch (packet_type) { 707 case HCI_EVENT_PACKET: 708 switch (hci_event_packet_get_type(packet)) { 709 710 case L2CAP_EVENT_INCOMING_CONNECTION: 711 btstack_assert(avrcp_controller_packet_handler != NULL); 712 btstack_assert(avrcp_target_packet_handler != NULL); 713 714 l2cap_event_incoming_connection_get_address(packet, event_addr); 715 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 716 outoing_active = false; 717 718 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 719 if (connection_target != NULL){ 720 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 721 outoing_active = true; 722 connection_target->incoming_declined = true; 723 } 724 } 725 726 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 727 if (connection_controller != NULL){ 728 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 729 outoing_active = true; 730 connection_controller->incoming_declined = true; 731 } 732 } 733 734 decline_connection = outoing_active; 735 if (decline_connection == false){ 736 uint16_t avrcp_cid; 737 if ((connection_controller == NULL) || (connection_target == NULL)){ 738 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 739 } else { 740 avrcp_cid = connection_controller->avrcp_cid; 741 } 742 // create two connection objects (both) 743 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, local_cid, avrcp_cid); 744 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, local_cid, avrcp_cid); 745 if ((connection_target == NULL) || (connection_controller == NULL)){ 746 decline_connection = true; 747 if (connection_target) { 748 avrcp_finalize_connection(connection_target); 749 } 750 if (connection_controller) { 751 avrcp_finalize_connection(connection_controller); 752 } 753 } 754 } 755 if (decline_connection){ 756 l2cap_decline_connection(local_cid); 757 } else { 758 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 759 l2cap_accept_connection(local_cid); 760 } 761 break; 762 763 case L2CAP_EVENT_CHANNEL_OPENED: 764 l2cap_event_channel_opened_get_address(packet, event_addr); 765 status = l2cap_event_channel_opened_get_status(packet); 766 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 767 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 768 769 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 770 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 771 772 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 773 // outgoing: structs are cteated in avrcp_connect() 774 if ((connection_controller == NULL) || (connection_target == NULL)) { 775 break; 776 } 777 778 switch (status){ 779 case ERROR_CODE_SUCCESS: 780 avrcp_handle_open_connection_for_role(connection_target, local_cid, l2cap_mtu); 781 avrcp_handle_open_connection_for_role(connection_controller, local_cid, l2cap_mtu); 782 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, status); 783 return; 784 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 785 if (connection_controller->incoming_declined == true){ 786 log_info("Incoming connection was declined, and the outgoing failed"); 787 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RECONNECT; 788 connection_controller->incoming_declined = false; 789 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RECONNECT; 790 connection_target->incoming_declined = false; 791 avrcp_reconnect_timer_start(connection_controller); 792 return; 793 } 794 break; 795 default: 796 break; 797 } 798 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 799 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, status); 800 avrcp_finalize_connection(connection_controller); 801 avrcp_finalize_connection(connection_target); 802 803 break; 804 805 case L2CAP_EVENT_CHANNEL_CLOSED: 806 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 807 808 connection_controller = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 809 connection_target = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 810 if ((connection_controller == NULL) || (connection_target == NULL)) { 811 break; 812 } 813 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 814 avrcp_finalize_connection(connection_controller); 815 816 avrcp_emit_connection_closed(connection_target->avrcp_cid); 817 avrcp_finalize_connection(connection_target); 818 break; 819 820 case L2CAP_EVENT_CAN_SEND_NOW: 821 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 822 823 connection_target = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 824 if (connection_target && connection_target->wait_to_send){ 825 connection_target->wait_to_send = 0; 826 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 827 break; 828 } 829 830 connection_controller = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 831 if (connection_controller && connection_controller->wait_to_send){ 832 connection_controller->wait_to_send = 0; 833 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 834 break; 835 } 836 break; 837 838 default: 839 break; 840 } 841 break; 842 843 case L2CAP_DATA_PACKET: 844 switch (avrcp_get_frame_type(packet[0])){ 845 case AVRCP_RESPONSE_FRAME: 846 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 847 break; 848 case AVRCP_COMMAND_FRAME: 849 default: // make compiler happy 850 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 851 break; 852 } 853 break; 854 855 default: 856 break; 857 } 858 } 859 860 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 861 avrcp_connection_t * connection_controller = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 862 if (!connection_controller){ 863 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 864 } 865 avrcp_connection_t * connection_target = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 866 if (!connection_target){ 867 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 868 } 869 if (connection_controller->browsing_connection){ 870 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid, 0); 871 } 872 l2cap_disconnect(connection_controller->l2cap_signaling_cid, 0); 873 return ERROR_CODE_SUCCESS; 874 } 875 876 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 877 btstack_assert(avrcp_controller_packet_handler != NULL); 878 btstack_assert(avrcp_target_packet_handler != NULL); 879 880 // TODO: implement delayed SDP query 881 if (sdp_client_ready() == 0){ 882 return ERROR_CODE_COMMAND_DISALLOWED; 883 } 884 885 avrcp_connection_t * connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 886 if (connection_controller){ 887 return ERROR_CODE_COMMAND_DISALLOWED; 888 } 889 avrcp_connection_t * connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 890 if (connection_target){ 891 return ERROR_CODE_COMMAND_DISALLOWED; 892 } 893 894 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 895 896 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 897 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 898 899 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 900 if (!connection_target){ 901 avrcp_finalize_connection(connection_controller); 902 return BTSTACK_MEMORY_ALLOC_FAILED; 903 } 904 905 if (avrcp_cid != NULL){ 906 *avrcp_cid = cid; 907 } 908 909 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 910 connection_controller->avrcp_cid = cid; 911 912 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 913 connection_target->avrcp_cid = cid; 914 915 sdp_query_context = &avrcp_context; 916 sdp_query_context->avrcp_l2cap_psm = 0; 917 sdp_query_context->avrcp_version = 0; 918 sdp_query_context->avrcp_cid = cid; 919 memcpy(sdp_query_context->remote_addr, remote_addr, 6); 920 921 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 922 return ERROR_CODE_SUCCESS; 923 } 924 925 void avrcp_init(void){ 926 connections = NULL; 927 if (l2cap_service_registered) return; 928 929 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 930 if (status != ERROR_CODE_SUCCESS) return; 931 l2cap_service_registered = true; 932 } 933 934 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 935 avrcp_controller_packet_handler = callback; 936 } 937 938 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 939 avrcp_target_packet_handler = callback; 940 } 941 942 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 943 btstack_assert(callback != NULL); 944 avrcp_callback = callback; 945 } 946 947 // AVRCP Browsing Service functions 948 static void avrcp_browsing_finalize_connection(avrcp_connection_t * connection){ 949 btstack_run_loop_remove_timer(&connection->browsing_connection->reconnect_timer); 950 btstack_memory_avrcp_browsing_connection_free(connection->browsing_connection); 951 connection->browsing_connection = NULL; 952 } 953 954 static void avrcp_emit_browsing_connection_established(uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 955 btstack_assert(avrcp_browsing_callback != NULL); 956 957 uint8_t event[12]; 958 int pos = 0; 959 event[pos++] = HCI_EVENT_AVRCP_META; 960 event[pos++] = sizeof(event) - 2; 961 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 962 event[pos++] = status; 963 reverse_bd_addr(addr,&event[pos]); 964 pos += 6; 965 little_endian_store_16(event, pos, browsing_cid); 966 pos += 2; 967 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 968 } 969 970 static void avrcp_emit_incoming_browsing_connection(uint16_t browsing_cid, bd_addr_t addr){ 971 btstack_assert(avrcp_browsing_callback != NULL); 972 973 uint8_t event[11]; 974 int pos = 0; 975 event[pos++] = HCI_EVENT_AVRCP_META; 976 event[pos++] = sizeof(event) - 2; 977 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 978 reverse_bd_addr(addr,&event[pos]); 979 pos += 6; 980 little_endian_store_16(event, pos, browsing_cid); 981 pos += 2; 982 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 983 } 984 985 static void avrcp_emit_browsing_connection_closed(uint16_t browsing_cid){ 986 btstack_assert(avrcp_browsing_callback != NULL); 987 988 uint8_t event[5]; 989 int pos = 0; 990 event[pos++] = HCI_EVENT_AVRCP_META; 991 event[pos++] = sizeof(event) - 2; 992 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 993 little_endian_store_16(event, pos, browsing_cid); 994 pos += 2; 995 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 996 } 997 998 999 static avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection, uint16_t avrcp_browsing_cid){ 1000 avrcp_browsing_connection_t * browsing_connection = btstack_memory_avrcp_browsing_connection_get(); 1001 if (!browsing_connection){ 1002 log_error("Not enough memory to create browsing connection"); 1003 return NULL; 1004 } 1005 browsing_connection->state = AVCTP_CONNECTION_IDLE; 1006 browsing_connection->transaction_label = 0xFF; 1007 1008 avrcp_connection->avrcp_browsing_cid = avrcp_browsing_cid; 1009 avrcp_connection->browsing_connection = browsing_connection; 1010 1011 log_info("avrcp_browsing_create_connection, avrcp cid 0x%02x", avrcp_connection->avrcp_browsing_cid); 1012 return browsing_connection; 1013 } 1014 1015 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){ 1016 browsing_connection->ertm_buffer = ertm_buffer; 1017 browsing_connection->ertm_buffer_size = ertm_buffer_size; 1018 1019 if (ertm_buffer_size > 0) { 1020 (void)memcpy(&browsing_connection->ertm_config, ertm_config, 1021 sizeof(l2cap_ertm_config_t)); 1022 log_info("avrcp_browsing_configure_ertm"); 1023 } 1024 } 1025 1026 static avrcp_browsing_connection_t * avrcp_browsing_handle_incoming_connection(avrcp_connection_t * connection, uint16_t local_cid, uint16_t avrcp_browsing_cid){ 1027 if (connection->browsing_connection == NULL){ 1028 avrcp_browsing_create_connection(connection, avrcp_browsing_cid); 1029 } 1030 if (connection->browsing_connection) { 1031 connection->browsing_connection->l2cap_browsing_cid = local_cid; 1032 connection->browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 1033 btstack_run_loop_remove_timer(&connection->browsing_connection->reconnect_timer); 1034 } 1035 return connection->browsing_connection; 1036 } 1037 1038 static void avrcp_browsing_handle_open_connection_for_role( avrcp_connection_t * connection, uint16_t local_cid){ 1039 connection->browsing_connection->l2cap_browsing_cid = local_cid; 1040 connection->browsing_connection->incoming_declined = false; 1041 connection->browsing_connection->state = AVCTP_CONNECTION_OPENED; 1042 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); 1043 } 1044 1045 static void avrcp_browsing_packet_handler_with_role(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size, avrcp_role_t avrcp_role){ 1046 UNUSED(channel); 1047 UNUSED(size); 1048 bd_addr_t event_addr; 1049 uint16_t local_cid; 1050 uint8_t status; 1051 bool decline_connection; 1052 bool outoing_active; 1053 1054 btstack_packet_handler_t browsing_callback; 1055 avrcp_connection_t * connection_controller; 1056 avrcp_connection_t * connection_target; 1057 1058 switch (packet_type){ 1059 case L2CAP_DATA_PACKET: 1060 switch (avrcp_get_frame_type(packet[0])){ 1061 case AVRCP_RESPONSE_FRAME: 1062 (*avrcp_browsing_controller_packet_handler)(packet_type, channel, packet, size); 1063 break; 1064 case AVRCP_COMMAND_FRAME: 1065 default: // make compiler happy 1066 (*avrcp_browsing_target_packet_handler)(packet_type, channel, packet, size); 1067 break; 1068 } 1069 break; 1070 case HCI_EVENT_PACKET: 1071 switch (avrcp_role){ 1072 case AVRCP_CONTROLLER: 1073 browsing_callback = avrcp_browsing_controller_packet_handler; 1074 break; 1075 case AVRCP_TARGET: 1076 default: 1077 browsing_callback = avrcp_browsing_target_packet_handler; 1078 break; 1079 } 1080 btstack_assert(browsing_callback != NULL); 1081 1082 switch (hci_event_packet_get_type(packet)) { 1083 1084 case L2CAP_EVENT_INCOMING_CONNECTION: 1085 btstack_assert(avrcp_browsing_controller_packet_handler != NULL); 1086 btstack_assert(avrcp_browsing_target_packet_handler != NULL); 1087 1088 l2cap_event_incoming_connection_get_address(packet, event_addr); 1089 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 1090 outoing_active = false; 1091 1092 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 1093 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1094 1095 if (connection_target == NULL || connection_controller == NULL) { 1096 l2cap_decline_connection(local_cid); 1097 return; 1098 } 1099 1100 if (connection_target->browsing_connection != NULL){ 1101 if (connection_target->browsing_connection->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 1102 outoing_active = true; 1103 connection_target->browsing_connection->incoming_declined = true; 1104 } 1105 } 1106 1107 if (connection_controller->browsing_connection != NULL){ 1108 if (connection_controller->browsing_connection->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 1109 outoing_active = true; 1110 connection_controller->browsing_connection->incoming_declined = true; 1111 } 1112 } 1113 1114 decline_connection = outoing_active; 1115 if (decline_connection == false){ 1116 uint16_t avrcp_browsing_cid; 1117 if ((connection_controller->browsing_connection == NULL) || (connection_target->browsing_connection == NULL)){ 1118 avrcp_browsing_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1119 } else { 1120 avrcp_browsing_cid = connection_controller->avrcp_browsing_cid; 1121 } 1122 1123 // create two connection objects (both) 1124 connection_target->browsing_connection = avrcp_browsing_handle_incoming_connection(connection_target, local_cid, avrcp_browsing_cid); 1125 connection_controller->browsing_connection = avrcp_browsing_handle_incoming_connection(connection_controller, local_cid, avrcp_browsing_cid); 1126 1127 if ((connection_target->browsing_connection == NULL) || (connection_controller->browsing_connection == NULL)){ 1128 decline_connection = true; 1129 if (connection_target->browsing_connection) { 1130 avrcp_browsing_finalize_connection(connection_target); 1131 } 1132 if (connection_controller->browsing_connection) { 1133 avrcp_browsing_finalize_connection(connection_controller); 1134 } 1135 } 1136 } 1137 if (decline_connection){ 1138 l2cap_decline_connection(local_cid); 1139 } else { 1140 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION browsing_avrcp_cid 0x%02x", connection_controller->avrcp_browsing_cid); 1141 avrcp_emit_incoming_browsing_connection(connection_controller->avrcp_browsing_cid, event_addr); 1142 } 1143 break; 1144 1145 case L2CAP_EVENT_CHANNEL_OPENED: 1146 l2cap_event_channel_opened_get_address(packet, event_addr); 1147 status = l2cap_event_channel_opened_get_status(packet); 1148 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 1149 log_info("received L2CAP_EVENT_CHANNEL_OPENED, cid 0x%02x", local_cid); 1150 1151 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1152 if (!connection_controller){ 1153 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 1154 avrcp_emit_browsing_connection_established(local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 1155 l2cap_disconnect(local_cid, 0); // reason isn't used 1156 break; 1157 } 1158 1159 if (status != ERROR_CODE_SUCCESS){ 1160 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 1161 avrcp_emit_browsing_connection_established(connection_controller->avrcp_browsing_cid, event_addr, status); 1162 avrcp_browsing_finalize_connection(connection_controller); 1163 break; 1164 } 1165 if (connection_controller->browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 1166 1167 connection_controller->browsing_connection->l2cap_browsing_cid = local_cid; 1168 1169 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", connection_controller->avrcp_browsing_cid, connection_controller->browsing_connection->l2cap_browsing_cid); 1170 connection_controller->browsing_connection->state = AVCTP_CONNECTION_OPENED; 1171 avrcp_emit_browsing_connection_established(connection_controller->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 1172 break; 1173 1174 case L2CAP_EVENT_CHANNEL_CLOSED: 1175 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1176 connection_controller = get_avrcp_connection_for_browsing_l2cap_cid_for_role(AVRCP_CONTROLLER, local_cid); 1177 1178 if (connection_controller && connection_controller->browsing_connection){ 1179 avrcp_emit_browsing_connection_closed(connection_controller->avrcp_browsing_cid); 1180 avrcp_browsing_finalize_connection(connection_controller); 1181 break; 1182 } 1183 break; 1184 case HCI_EVENT_DISCONNECTION_COMPLETE: 1185 avrcp_emit_browsing_connection_closed(ERROR_CODE_SUCCESS); 1186 break; 1187 case L2CAP_EVENT_CAN_SEND_NOW: 1188 (*browsing_callback)(packet_type, channel, packet, size); 1189 break; 1190 1191 default: 1192 break; 1193 } 1194 break; 1195 default: 1196 break; 1197 } 1198 1199 } 1200 1201 static void avrcp_browsing_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1202 avrcp_browsing_packet_handler_with_role(packet_type, channel, packet, size, AVRCP_CONTROLLER); 1203 // avrcp_browsing_packet_handler_with_role(packet_type, channel, packet, size, AVRCP_TARGET); 1204 } 1205 1206 void avrcp_browsing_init(void){ 1207 if (l2cap_browsing_service_registered) return; 1208 int status = l2cap_register_service(&avrcp_browsing_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 1209 1210 if (status != ERROR_CODE_SUCCESS) return; 1211 l2cap_browsing_service_registered = true; 1212 } 1213 1214 1215 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){ 1216 btstack_assert(avrcp_browsing_controller_packet_handler != NULL); 1217 btstack_assert(avrcp_browsing_target_packet_handler != NULL); 1218 1219 avrcp_connection_t * connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1220 if (!connection_controller){ 1221 return ERROR_CODE_COMMAND_DISALLOWED; 1222 } 1223 avrcp_connection_t * connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1224 if (!connection_target){ 1225 return ERROR_CODE_COMMAND_DISALLOWED; 1226 } 1227 1228 if (connection_controller->browsing_connection){ 1229 return ERROR_CODE_COMMAND_DISALLOWED; 1230 } 1231 if (connection_target->browsing_connection){ 1232 return ERROR_CODE_COMMAND_DISALLOWED; 1233 } 1234 1235 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1236 1237 connection_controller->browsing_connection = avrcp_browsing_create_connection(connection_controller, cid); 1238 if (!connection_controller->browsing_connection) return BTSTACK_MEMORY_ALLOC_FAILED; 1239 1240 connection_target->browsing_connection = avrcp_browsing_create_connection(connection_target, cid); 1241 if (!connection_target->browsing_connection){ 1242 avrcp_browsing_finalize_connection(connection_controller); 1243 return BTSTACK_MEMORY_ALLOC_FAILED; 1244 } 1245 avrcp_browsing_configure_ertm(connection_controller->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 1246 avrcp_browsing_configure_ertm(connection_target->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 1247 1248 if (avrcp_browsing_cid != NULL){ 1249 *avrcp_browsing_cid = cid; 1250 } 1251 1252 connection_controller->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 1253 connection_target->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 1254 1255 return l2cap_create_ertm_channel(avrcp_browsing_packet_handler, remote_addr, connection_controller->browsing_l2cap_psm, 1256 &connection_controller->browsing_connection->ertm_config, 1257 connection_controller->browsing_connection->ertm_buffer, 1258 connection_controller->browsing_connection->ertm_buffer_size, NULL); 1259 1260 } 1261 1262 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){ 1263 avrcp_connection_t * connection_controller = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_CONTROLLER, avrcp_browsing_cid); 1264 if (!connection_controller){ 1265 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1266 } 1267 avrcp_connection_t * connection_target = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 1268 if (!connection_target){ 1269 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1270 } 1271 1272 if (!connection_controller->browsing_connection){ 1273 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1274 } 1275 if (!connection_target->browsing_connection){ 1276 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1277 } 1278 1279 if (connection_controller->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 1280 return ERROR_CODE_COMMAND_DISALLOWED; 1281 } 1282 1283 avrcp_browsing_configure_ertm(connection_controller->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 1284 avrcp_browsing_configure_ertm(connection_target->browsing_connection, ertm_buffer, ertm_buffer_size, ertm_config); 1285 1286 connection_controller->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 1287 connection_target->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 1288 1289 l2cap_accept_ertm_connection(connection_controller->browsing_connection->l2cap_browsing_cid, 1290 &connection_controller->browsing_connection->ertm_config, 1291 connection_controller->browsing_connection->ertm_buffer, 1292 connection_controller->browsing_connection->ertm_buffer_size); 1293 return ERROR_CODE_SUCCESS; 1294 } 1295 1296 1297 uint8_t avrcp_browsing_decline_incoming_connection(uint16_t avrcp_browsing_cid){ 1298 avrcp_connection_t * connection_controller = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_CONTROLLER, avrcp_browsing_cid); 1299 if (!connection_controller){ 1300 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1301 } 1302 avrcp_connection_t * connection_target = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 1303 if (!connection_target){ 1304 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1305 } 1306 1307 if (!connection_controller->browsing_connection){ 1308 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1309 } 1310 if (!connection_target->browsing_connection){ 1311 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1312 } 1313 1314 if (connection_controller->browsing_connection->state != AVCTP_CONNECTION_W4_ERTM_CONFIGURATION){ 1315 return ERROR_CODE_COMMAND_DISALLOWED; 1316 } 1317 1318 l2cap_decline_connection(connection_controller->browsing_connection->l2cap_browsing_cid); 1319 1320 avrcp_browsing_finalize_connection(connection_controller); 1321 avrcp_browsing_finalize_connection(connection_target); 1322 return ERROR_CODE_SUCCESS; 1323 } 1324 1325 uint8_t avrcp_browsing_disconnect(uint16_t avrcp_browsing_cid){ 1326 avrcp_connection_t * connection_controller = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_CONTROLLER, avrcp_browsing_cid); 1327 if (!connection_controller){ 1328 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1329 } 1330 avrcp_connection_t * connection_target = get_avrcp_connection_for_browsing_cid_for_role(AVRCP_TARGET, avrcp_browsing_cid); 1331 if (!connection_target){ 1332 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1333 } 1334 1335 if (!connection_controller->browsing_connection){ 1336 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1337 } 1338 if (!connection_target->browsing_connection){ 1339 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1340 } 1341 1342 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid, 0); 1343 return ERROR_CODE_SUCCESS; 1344 } 1345 1346 void avrcp_browsing_register_controller_packet_handler(btstack_packet_handler_t callback){ 1347 avrcp_browsing_controller_packet_handler = callback; 1348 } 1349 1350 void avrcp_browsing_register_target_packet_handler(btstack_packet_handler_t callback){ 1351 avrcp_browsing_target_packet_handler = callback; 1352 } 1353 1354 void avrcp_browsing_register_packet_handler(btstack_packet_handler_t callback){ 1355 btstack_assert(callback != NULL); 1356 avrcp_browsing_callback = callback; 1357 }