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 void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 690 UNUSED(channel); 691 UNUSED(size); 692 bd_addr_t event_addr; 693 uint16_t local_cid; 694 uint16_t l2cap_mtu; 695 uint8_t status; 696 avrcp_frame_type_t frame_type; 697 bool decline_connection; 698 bool outoing_active; 699 700 avrcp_connection_t * connection_controller; 701 avrcp_connection_t * connection_target; 702 703 switch (packet_type) { 704 case HCI_EVENT_PACKET: 705 switch (hci_event_packet_get_type(packet)) { 706 707 case L2CAP_EVENT_INCOMING_CONNECTION: 708 btstack_assert(avrcp_controller_packet_handler != NULL); 709 btstack_assert(avrcp_target_packet_handler != NULL); 710 711 l2cap_event_incoming_connection_get_address(packet, event_addr); 712 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 713 outoing_active = false; 714 715 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 716 if (connection_target != NULL){ 717 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 718 outoing_active = true; 719 connection_target->incoming_declined = true; 720 } 721 } 722 723 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 724 if (connection_controller != NULL){ 725 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 726 outoing_active = true; 727 connection_controller->incoming_declined = true; 728 } 729 } 730 731 decline_connection = outoing_active; 732 if (decline_connection == false){ 733 uint16_t avrcp_cid; 734 if ((connection_controller == NULL) || (connection_target == NULL)){ 735 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 736 } else { 737 avrcp_cid = connection_controller->avrcp_cid; 738 } 739 // create two connection objects (both) 740 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, local_cid, avrcp_cid); 741 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, local_cid, avrcp_cid); 742 if ((connection_target == NULL) || (connection_controller == NULL)){ 743 decline_connection = true; 744 if (connection_target) { 745 avrcp_finalize_connection(connection_target); 746 } 747 if (connection_controller) { 748 avrcp_finalize_connection(connection_controller); 749 } 750 } 751 } 752 if (decline_connection){ 753 l2cap_decline_connection(local_cid); 754 } else { 755 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 756 l2cap_accept_connection(local_cid); 757 } 758 break; 759 760 case L2CAP_EVENT_CHANNEL_OPENED: 761 l2cap_event_channel_opened_get_address(packet, event_addr); 762 status = l2cap_event_channel_opened_get_status(packet); 763 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 764 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 765 766 connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 767 connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 768 769 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 770 // outgoing: structs are cteated in avrcp_connect() 771 if ((connection_controller == NULL) || (connection_target == NULL)) { 772 break; 773 } 774 775 switch (status){ 776 case ERROR_CODE_SUCCESS: 777 avrcp_handle_open_connection_for_role(connection_target, local_cid, l2cap_mtu); 778 avrcp_handle_open_connection_for_role(connection_controller, local_cid, l2cap_mtu); 779 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, status); 780 return; 781 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 782 if (connection_controller->incoming_declined == true){ 783 log_info("Incoming connection was declined, and the outgoing failed"); 784 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RECONNECT; 785 connection_controller->incoming_declined = false; 786 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RECONNECT; 787 connection_target->incoming_declined = false; 788 avrcp_reconnect_timer_start(connection_controller); 789 return; 790 } 791 break; 792 default: 793 break; 794 } 795 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 796 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, status); 797 avrcp_finalize_connection(connection_controller); 798 avrcp_finalize_connection(connection_target); 799 800 break; 801 802 case L2CAP_EVENT_CHANNEL_CLOSED: 803 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 804 805 connection_controller = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 806 connection_target = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 807 if ((connection_controller == NULL) || (connection_target == NULL)) { 808 break; 809 } 810 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 811 avrcp_finalize_connection(connection_controller); 812 813 avrcp_emit_connection_closed(connection_target->avrcp_cid); 814 avrcp_finalize_connection(connection_target); 815 break; 816 817 case L2CAP_EVENT_CAN_SEND_NOW: 818 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 819 820 connection_target = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 821 if (connection_target && connection_target->wait_to_send){ 822 connection_target->wait_to_send = 0; 823 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 824 break; 825 } 826 827 connection_controller = get_avrcp_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 828 if (connection_controller && connection_controller->wait_to_send){ 829 connection_controller->wait_to_send = 0; 830 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 831 break; 832 } 833 break; 834 835 default: 836 break; 837 } 838 break; 839 840 case L2CAP_DATA_PACKET: 841 frame_type = (avrcp_frame_type_t)((packet[0] & 0x02) >> 1); 842 843 switch (frame_type){ 844 case AVRCP_RESPONSE_FRAME: 845 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 846 break; 847 case AVRCP_COMMAND_FRAME: 848 default: // make compiler happy 849 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 850 break; 851 } 852 break; 853 854 default: 855 break; 856 } 857 } 858 859 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 860 avrcp_connection_t * connection_controller = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 861 if (!connection_controller){ 862 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 863 } 864 avrcp_connection_t * connection_target = get_avrcp_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 865 if (!connection_target){ 866 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 867 } 868 if (connection_controller->browsing_connection){ 869 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid, 0); 870 } 871 l2cap_disconnect(connection_controller->l2cap_signaling_cid, 0); 872 return ERROR_CODE_SUCCESS; 873 } 874 875 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 876 btstack_assert(avrcp_controller_packet_handler != NULL); 877 btstack_assert(avrcp_target_packet_handler != NULL); 878 879 // TODO: implement delayed SDP query 880 if (sdp_client_ready() == 0){ 881 return ERROR_CODE_COMMAND_DISALLOWED; 882 } 883 884 avrcp_connection_t * connection_controller = get_avrcp_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 885 if (connection_controller){ 886 return ERROR_CODE_COMMAND_DISALLOWED; 887 } 888 avrcp_connection_t * connection_target = get_avrcp_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 889 if (connection_target){ 890 return ERROR_CODE_COMMAND_DISALLOWED; 891 } 892 893 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 894 895 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 896 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 897 898 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 899 if (!connection_target){ 900 avrcp_finalize_connection(connection_controller); 901 return BTSTACK_MEMORY_ALLOC_FAILED; 902 } 903 904 if (avrcp_cid != NULL){ 905 *avrcp_cid = cid; 906 } 907 908 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 909 connection_controller->avrcp_cid = cid; 910 911 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 912 connection_target->avrcp_cid = cid; 913 914 sdp_query_context = &avrcp_context; 915 sdp_query_context->avrcp_l2cap_psm = 0; 916 sdp_query_context->avrcp_version = 0; 917 sdp_query_context->avrcp_cid = cid; 918 memcpy(sdp_query_context->remote_addr, remote_addr, 6); 919 920 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 921 return ERROR_CODE_SUCCESS; 922 } 923 924 void avrcp_init(void){ 925 connections = NULL; 926 if (l2cap_service_registered) return; 927 928 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 929 if (status != ERROR_CODE_SUCCESS) return; 930 l2cap_service_registered = true; 931 } 932 933 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 934 avrcp_controller_packet_handler = callback; 935 } 936 937 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 938 avrcp_target_packet_handler = callback; 939 } 940 941 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 942 btstack_assert(callback != NULL); 943 avrcp_callback = callback; 944 } 945 946 // AVRCP Browsing Service functions 947 948 avrcp_browsing_connection_t * avrcp_browsing_create_connection(avrcp_connection_t * avrcp_connection){ 949 avrcp_browsing_connection_t * connection = btstack_memory_avrcp_browsing_connection_get(); 950 connection->state = AVCTP_CONNECTION_IDLE; 951 connection->transaction_label = 0xFF; 952 avrcp_connection->avrcp_browsing_cid = avrcp_get_next_cid(avrcp_connection->role); 953 avrcp_connection->browsing_connection = connection; 954 return connection; 955 } 956 957 static void avrcp_emit_browsing_connection_established(uint16_t browsing_cid, bd_addr_t addr, uint8_t status){ 958 btstack_assert(avrcp_browsing_callback != NULL); 959 960 uint8_t event[12]; 961 int pos = 0; 962 event[pos++] = HCI_EVENT_AVRCP_META; 963 event[pos++] = sizeof(event) - 2; 964 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_ESTABLISHED; 965 event[pos++] = status; 966 reverse_bd_addr(addr,&event[pos]); 967 pos += 6; 968 little_endian_store_16(event, pos, browsing_cid); 969 pos += 2; 970 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 971 } 972 973 static void avrcp_emit_incoming_browsing_connection(uint16_t browsing_cid, bd_addr_t addr){ 974 btstack_assert(avrcp_browsing_callback != NULL); 975 976 uint8_t event[11]; 977 int pos = 0; 978 event[pos++] = HCI_EVENT_AVRCP_META; 979 event[pos++] = sizeof(event) - 2; 980 event[pos++] = AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION; 981 reverse_bd_addr(addr,&event[pos]); 982 pos += 6; 983 little_endian_store_16(event, pos, browsing_cid); 984 pos += 2; 985 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 986 } 987 988 static void avrcp_emit_browsing_connection_closed(uint16_t browsing_cid){ 989 btstack_assert(avrcp_browsing_callback != NULL); 990 991 uint8_t event[5]; 992 int pos = 0; 993 event[pos++] = HCI_EVENT_AVRCP_META; 994 event[pos++] = sizeof(event) - 2; 995 event[pos++] = AVRCP_SUBEVENT_BROWSING_CONNECTION_RELEASED; 996 little_endian_store_16(event, pos, browsing_cid); 997 pos += 2; 998 (*avrcp_browsing_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 999 } 1000 1001 1002 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){ 1003 UNUSED(channel); 1004 UNUSED(size); 1005 bd_addr_t event_addr; 1006 uint16_t local_cid; 1007 uint8_t status; 1008 avrcp_browsing_connection_t * browsing_connection = NULL; 1009 avrcp_connection_t * avrcp_connection = NULL; 1010 1011 btstack_packet_handler_t browsing_callback; 1012 1013 switch (avrcp_role){ 1014 case AVRCP_CONTROLLER: 1015 browsing_callback = avrcp_browsing_controller_packet_handler; 1016 break; 1017 case AVRCP_TARGET: 1018 browsing_callback = avrcp_browsing_target_packet_handler; 1019 break; 1020 default: 1021 break; 1022 } 1023 btstack_assert(browsing_callback != NULL); 1024 1025 switch (packet_type){ 1026 case L2CAP_DATA_PACKET: 1027 (*browsing_callback)(packet_type, channel, packet, size); 1028 // frame_type = (avrcp_frame_type_t)((packet[0] & 0x02) >> 1); 1029 1030 // switch (frame_type){ 1031 // case AVRCP_RESPONSE_FRAME: 1032 // (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1033 // break; 1034 // case AVRCP_COMMAND_FRAME: 1035 // default: // make compiler happy 1036 // (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1037 // break; 1038 // } 1039 break; 1040 case HCI_EVENT_PACKET: 1041 1042 switch (hci_event_packet_get_type(packet)) { 1043 case L2CAP_EVENT_CAN_SEND_NOW: 1044 (*browsing_callback)(packet_type, channel, packet, size); 1045 break; 1046 1047 case HCI_EVENT_DISCONNECTION_COMPLETE: 1048 avrcp_emit_browsing_connection_closed(ERROR_CODE_SUCCESS); 1049 break; 1050 case L2CAP_EVENT_INCOMING_CONNECTION: 1051 l2cap_event_incoming_connection_get_address(packet, event_addr); 1052 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 1053 avrcp_connection = get_avrcp_connection_for_bd_addr_for_role(avrcp_role, event_addr); 1054 if (!avrcp_connection) { 1055 log_error("No previously created AVRCP controller connections"); 1056 l2cap_decline_connection(local_cid); 1057 break; 1058 } 1059 browsing_connection = avrcp_browsing_create_connection(avrcp_connection); 1060 browsing_connection->l2cap_browsing_cid = local_cid; 1061 browsing_connection->state = AVCTP_CONNECTION_W4_ERTM_CONFIGURATION; 1062 log_info("Emit AVRCP_SUBEVENT_INCOMING_BROWSING_CONNECTION browsing_cid 0x%02x, l2cap_signaling_cid 0x%02x\n", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 1063 avrcp_emit_incoming_browsing_connection(avrcp_connection->avrcp_browsing_cid, event_addr); 1064 break; 1065 1066 case L2CAP_EVENT_CHANNEL_OPENED: 1067 l2cap_event_channel_opened_get_address(packet, event_addr); 1068 status = l2cap_event_channel_opened_get_status(packet); 1069 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 1070 log_info("received L2CAP_EVENT_CHANNEL_OPENED, cid 0x%02x", local_cid); 1071 1072 avrcp_connection = get_avrcp_connection_for_bd_addr_for_role(avrcp_role, event_addr); 1073 if (!avrcp_connection){ 1074 log_error("Failed to find AVRCP connection for bd_addr %s", bd_addr_to_str(event_addr)); 1075 avrcp_emit_browsing_connection_established(local_cid, event_addr, L2CAP_LOCAL_CID_DOES_NOT_EXIST); 1076 l2cap_disconnect(local_cid, 0); // reason isn't used 1077 break; 1078 } 1079 1080 browsing_connection = avrcp_connection->browsing_connection; 1081 if (status != ERROR_CODE_SUCCESS){ 1082 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 1083 avrcp_emit_browsing_connection_established(avrcp_connection->avrcp_browsing_cid, event_addr, status); 1084 btstack_memory_avrcp_browsing_connection_free(browsing_connection); 1085 avrcp_connection->browsing_connection = NULL; 1086 break; 1087 } 1088 if (browsing_connection->state != AVCTP_CONNECTION_W4_L2CAP_CONNECTED) break; 1089 1090 browsing_connection->l2cap_browsing_cid = local_cid; 1091 1092 log_info("L2CAP_EVENT_CHANNEL_OPENED browsing cid 0x%02x, l2cap cid 0x%02x", avrcp_connection->avrcp_browsing_cid, browsing_connection->l2cap_browsing_cid); 1093 browsing_connection->state = AVCTP_CONNECTION_OPENED; 1094 avrcp_emit_browsing_connection_established(avrcp_connection->avrcp_browsing_cid, event_addr, ERROR_CODE_SUCCESS); 1095 break; 1096 1097 case L2CAP_EVENT_CHANNEL_CLOSED: 1098 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1099 avrcp_connection = get_avrcp_connection_for_browsing_l2cap_cid_for_role(avrcp_role, local_cid); 1100 1101 if (avrcp_connection && avrcp_connection->browsing_connection){ 1102 avrcp_emit_browsing_connection_closed(avrcp_connection->avrcp_browsing_cid); 1103 // free connection 1104 btstack_memory_avrcp_browsing_connection_free(avrcp_connection->browsing_connection); 1105 avrcp_connection->browsing_connection = NULL; 1106 break; 1107 } 1108 break; 1109 default: 1110 break; 1111 } 1112 break; 1113 default: 1114 break; 1115 } 1116 1117 } 1118 1119 static void avrcp_browsing_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 1120 avrcp_browsing_packet_handler_with_role(packet_type, channel, packet, size, AVRCP_CONTROLLER); 1121 // avrcp_browsing_packet_handler_with_role(packet_type, channel, packet, size, AVRCP_TARGET); 1122 } 1123 1124 void avrcp_browsing_init(void){ 1125 if (l2cap_browsing_service_registered) return; 1126 int status = l2cap_register_service(&avrcp_browsing_packet_handler, PSM_AVCTP_BROWSING, 0xffff, LEVEL_2); 1127 1128 if (status != ERROR_CODE_SUCCESS) return; 1129 l2cap_browsing_service_registered = true; 1130 } 1131 1132 uint8_t avrcp_browsing_connect(bd_addr_t remote_addr, avrcp_role_t avrcp_role, uint8_t * ertm_buffer, uint32_t ertm_buffer_size, l2cap_ertm_config_t * ertm_config, uint16_t * avrcp_browsing_cid){ 1133 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_bd_addr_for_role(avrcp_role, remote_addr); 1134 1135 if (!avrcp_connection){ 1136 log_error("avrcp: there is no previously established AVRCP controller connection."); 1137 return ERROR_CODE_COMMAND_DISALLOWED; 1138 } 1139 1140 avrcp_browsing_connection_t * connection = avrcp_connection->browsing_connection; 1141 if (connection){ 1142 log_error(" avrcp_browsing_connect connection exists."); 1143 return ERROR_CODE_SUCCESS; 1144 } 1145 1146 connection = avrcp_browsing_create_connection(avrcp_connection); 1147 if (!connection){ 1148 log_error("avrcp: could not allocate connection struct."); 1149 return BTSTACK_MEMORY_ALLOC_FAILED; 1150 } 1151 1152 if (avrcp_browsing_cid){ 1153 *avrcp_browsing_cid = avrcp_connection->avrcp_browsing_cid; 1154 } 1155 connection->ertm_buffer = ertm_buffer; 1156 connection->ertm_buffer_size = ertm_buffer_size; 1157 avrcp_connection->browsing_connection = connection; 1158 avrcp_connection->browsing_connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 1159 (void)memcpy(&connection->ertm_config, ertm_config, 1160 sizeof(l2cap_ertm_config_t)); 1161 1162 return l2cap_create_ertm_channel(avrcp_browsing_packet_handler, remote_addr, avrcp_connection->browsing_l2cap_psm, 1163 &connection->ertm_config, connection->ertm_buffer, connection->ertm_buffer_size, NULL); 1164 1165 } 1166 1167 uint8_t avrcp_browsing_disconnect(uint16_t avrcp_browsing_cid, avrcp_role_t avrcp_role){ 1168 avrcp_connection_t * avrcp_connection = get_avrcp_connection_for_browsing_cid_for_role(avrcp_role, avrcp_browsing_cid); 1169 if (!avrcp_connection){ 1170 log_error("avrcp_browsing_controller_disconnect: could not find a connection."); 1171 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1172 } 1173 if (avrcp_connection->browsing_connection->state != AVCTP_CONNECTION_OPENED) return ERROR_CODE_COMMAND_DISALLOWED; 1174 1175 l2cap_disconnect(avrcp_connection->browsing_connection->l2cap_browsing_cid, 0); 1176 return ERROR_CODE_SUCCESS; 1177 } 1178 1179 void avrcp_browsing_register_controller_packet_handler(btstack_packet_handler_t callback){ 1180 avrcp_browsing_controller_packet_handler = callback; 1181 } 1182 1183 void avrcp_browsing_register_target_packet_handler(btstack_packet_handler_t callback){ 1184 avrcp_browsing_target_packet_handler = callback; 1185 } 1186 1187 void avrcp_browsing_register_packet_handler(btstack_packet_handler_t callback){ 1188 btstack_assert(callback != NULL); 1189 avrcp_browsing_callback = callback; 1190 }