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 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 54 55 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 56 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 57 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 58 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 59 60 static uint16_t avrcp_cid_counter = 0; 61 62 static avrcp_context_t * sdp_query_context; 63 static uint8_t attribute_value[1000]; 64 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 65 66 static btstack_linked_list_t connections; 67 static btstack_packet_handler_t avrcp_controller_packet_handler; 68 static btstack_packet_handler_t avrcp_target_packet_handler; 69 static int l2cap_service_registered = 0; 70 71 static const char * avrcp_subunit_type_name[] = { 72 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 73 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 74 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 75 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 76 }; 77 78 const char * avrcp_subunit2str(uint16_t index){ 79 if (index <= 11) return avrcp_subunit_type_name[index]; 80 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 81 return avrcp_subunit_type_name[16]; 82 } 83 84 static const char * avrcp_event_name[] = { 85 "ERROR", "PLAYBACK_STATUS_CHANGED", 86 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 87 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 88 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 89 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 90 }; 91 const char * avrcp_event2str(uint16_t index){ 92 if (index <= 0x0d) return avrcp_event_name[index]; 93 return avrcp_event_name[0]; 94 } 95 96 static const char * avrcp_operation_name[] = { 97 "NOT SUPPORTED", // 0x3B 98 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 99 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 100 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 101 }; 102 const char * avrcp_operation2str(uint8_t index){ 103 if ((index >= 0x3B) && (index <= 0x4C)) return avrcp_operation_name[index - 0x3B]; 104 return avrcp_operation_name[0]; 105 } 106 107 static const char * avrcp_media_attribute_id_name[] = { 108 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 109 }; 110 const char * avrcp_attribute2str(uint8_t index){ 111 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 112 return avrcp_media_attribute_id_name[0]; 113 } 114 115 static const char * avrcp_play_status_name[] = { 116 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 117 "ERROR" // 0xFF 118 }; 119 const char * avrcp_play_status2str(uint8_t index){ 120 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 121 return avrcp_play_status_name[5]; 122 } 123 124 static const char * avrcp_ctype_name[] = { 125 "CONTROL", 126 "STATUS", 127 "SPECIFIC_INQUIRY", 128 "NOTIFY", 129 "GENERAL_INQUIRY", 130 "RESERVED5", 131 "RESERVED6", 132 "RESERVED7", 133 "NOT IMPLEMENTED IN REMOTE", 134 "ACCEPTED BY REMOTE", 135 "REJECTED BY REMOTE", 136 "IN_TRANSITION", 137 "IMPLEMENTED_STABLE", 138 "CHANGED_STABLE", 139 "RESERVED", 140 "INTERIM" 141 }; 142 const char * avrcp_ctype2str(uint8_t index){ 143 if (index < sizeof(avrcp_ctype_name)){ 144 return avrcp_ctype_name[index]; 145 } 146 return "NONE"; 147 } 148 149 static const char * avrcp_shuffle_mode_name[] = { 150 "SHUFFLE OFF", 151 "SHUFFLE ALL TRACKS", 152 "SHUFFLE GROUP" 153 }; 154 155 const char * avrcp_shuffle2str(uint8_t index){ 156 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 157 return "NONE"; 158 } 159 160 static const char * avrcp_repeat_mode_name[] = { 161 "REPEAT OFF", 162 "REPEAT SINGLE TRACK", 163 "REPEAT ALL TRACKS", 164 "REPEAT GROUP" 165 }; 166 167 const char * avrcp_repeat2str(uint8_t index){ 168 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 169 return "NONE"; 170 } 171 172 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 173 uint8_t cmd_opcode_index = 5; 174 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 175 return packet[cmd_opcode_index]; 176 } 177 178 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 179 const char * service_name, const char * service_provider_name){ 180 uint8_t* attribute; 181 de_create_sequence(service); 182 183 // 0x0000 "Service Record Handle" 184 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 185 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 186 187 // 0x0001 "Service Class ID List" 188 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 189 attribute = de_push_sequence(service); 190 { 191 if (controller){ 192 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 193 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 194 } else { 195 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 196 } 197 } 198 de_pop_sequence(service, attribute); 199 200 // 0x0004 "Protocol Descriptor List" 201 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 202 attribute = de_push_sequence(service); 203 { 204 uint8_t* l2cpProtocol = de_push_sequence(attribute); 205 { 206 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 207 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 208 } 209 de_pop_sequence(attribute, l2cpProtocol); 210 211 uint8_t* avctpProtocol = de_push_sequence(attribute); 212 { 213 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 214 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 215 } 216 de_pop_sequence(attribute, avctpProtocol); 217 } 218 de_pop_sequence(service, attribute); 219 220 // 0x0005 "Public Browse Group" 221 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 222 attribute = de_push_sequence(service); 223 { 224 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 225 } 226 de_pop_sequence(service, attribute); 227 228 // 0x0009 "Bluetooth Profile Descriptor List" 229 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 230 attribute = de_push_sequence(service); 231 { 232 uint8_t *avrcProfile = de_push_sequence(attribute); 233 { 234 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 235 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 236 } 237 de_pop_sequence(attribute, avrcProfile); 238 } 239 de_pop_sequence(service, attribute); 240 241 // 0x000d "Additional Bluetooth Profile Descriptor List" 242 if (browsing){ 243 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 244 attribute = de_push_sequence(service); 245 { 246 uint8_t * des = de_push_sequence(attribute); 247 { 248 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 249 { 250 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 251 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 252 } 253 de_pop_sequence(des, browsing_l2cpProtocol); 254 255 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 256 { 257 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 258 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 259 } 260 de_pop_sequence(des, browsing_avctpProtocol); 261 } 262 de_pop_sequence(attribute, des); 263 } 264 de_pop_sequence(service, attribute); 265 } 266 267 268 // 0x0100 "Service Name" 269 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 270 if (service_name){ 271 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 272 } else { 273 if (controller){ 274 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 275 } else { 276 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 277 } 278 } 279 280 // 0x0100 "Provider Name" 281 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 282 if (service_provider_name){ 283 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 284 } else { 285 if (controller){ 286 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 287 } else { 288 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 289 } 290 } 291 292 // 0x0311 "Supported Features" 293 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 294 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 295 } 296 297 avrcp_connection_t * get_avrcp_connection_for_bd_addr(avrcp_role_t role, bd_addr_t addr){ 298 btstack_linked_list_iterator_t it; 299 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 300 while (btstack_linked_list_iterator_has_next(&it)){ 301 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 302 if (connection->role != role) continue; 303 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 304 return connection; 305 } 306 return NULL; 307 } 308 309 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(avrcp_role_t role, uint16_t l2cap_cid){ 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 (connection->l2cap_signaling_cid != l2cap_cid) continue; 316 return connection; 317 } 318 return NULL; 319 } 320 321 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(avrcp_role_t role, uint16_t avrcp_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->avrcp_cid != avrcp_cid) continue; 328 return connection; 329 } 330 return NULL; 331 } 332 333 avrcp_connection_t * get_avrcp_connection_for_browsing_cid(avrcp_role_t role, uint16_t browsing_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_browsing_cid != browsing_cid) continue; 340 return connection; 341 } 342 return NULL; 343 } 344 345 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(avrcp_role_t role, uint16_t browsing_l2cap_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->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 352 return connection; 353 } 354 return NULL; 355 } 356 357 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(avrcp_role_t role, uint16_t 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 != l2cap_cid)) continue; 364 return connection->browsing_connection; 365 } 366 return NULL; 367 } 368 369 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 370 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 371 connection->wait_to_send = 1; 372 l2cap_request_can_send_now_event(l2cap_cid); 373 } 374 375 376 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 377 do { 378 if (avrcp_cid_counter == 0xffff) { 379 avrcp_cid_counter = 1; 380 } else { 381 avrcp_cid_counter++; 382 } 383 } while (get_avrcp_connection_for_avrcp_cid(role, avrcp_cid_counter) != NULL) ; 384 return avrcp_cid_counter; 385 } 386 387 388 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 389 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 390 if (!connection){ 391 log_error("Not enough memory to create connection for role %d", role); 392 return NULL; 393 } 394 395 connection->state = AVCTP_CONNECTION_IDLE; 396 connection->role = role; 397 connection->transaction_label = 0xFF; 398 connection->max_num_fragments = 0xFF; 399 connection->avrcp_cid = avrcp_get_next_cid(role); 400 log_info("avrcp_create_connection, role %d, avrcp cid 0x%02x", role, connection->avrcp_cid); 401 memcpy(connection->remote_addr, remote_addr, 6); 402 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 403 return connection; 404 } 405 406 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 407 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 408 btstack_memory_avrcp_connection_free(connection); 409 } 410 411 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 412 if (!callback) return; 413 uint8_t event[12]; 414 int pos = 0; 415 event[pos++] = HCI_EVENT_AVRCP_META; 416 event[pos++] = sizeof(event) - 2; 417 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 418 event[pos++] = status; 419 reverse_bd_addr(addr,&event[pos]); 420 pos += 6; 421 little_endian_store_16(event, pos, avrcp_cid); 422 pos += 2; 423 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 424 } 425 426 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 427 if (!callback) return; 428 uint8_t event[5]; 429 int pos = 0; 430 event[pos++] = HCI_EVENT_AVRCP_META; 431 event[pos++] = sizeof(event) - 2; 432 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 433 little_endian_store_16(event, pos, avrcp_cid); 434 pos += 2; 435 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 436 } 437 438 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 439 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->role, sdp_query_context->avrcp_cid); 440 if (!connection) return; 441 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 442 443 UNUSED(packet_type); 444 UNUSED(channel); 445 UNUSED(size); 446 uint8_t status; 447 des_iterator_t des_list_it; 448 des_iterator_t prot_it; 449 // uint32_t avdtp_remote_uuid = 0; 450 451 switch (hci_event_packet_get_type(packet)){ 452 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 453 // Handle new SDP record 454 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 455 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 456 sdp_query_context->parse_sdp_record = 0; 457 // log_info("SDP Record: Nr: %d", record_id); 458 } 459 460 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 461 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 462 463 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 464 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 465 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 466 if (de_get_element_type(attribute_value) != DE_DES) break; 467 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 468 uint8_t * element = des_iterator_get_element(&des_list_it); 469 if (de_get_element_type(element) != DE_UUID) continue; 470 uint32_t uuid = de_get_uuid32(element); 471 switch (uuid){ 472 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 473 if (sdp_query_context->role == AVRCP_CONTROLLER) { 474 sdp_query_context->parse_sdp_record = 1; 475 break; 476 } 477 break; 478 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 479 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 480 if (sdp_query_context->role == AVRCP_TARGET) { 481 sdp_query_context->parse_sdp_record = 1; 482 break; 483 } 484 break; 485 default: 486 break; 487 } 488 } 489 break; 490 491 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 492 if (!sdp_query_context->parse_sdp_record) break; 493 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 494 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 495 uint8_t *des_element; 496 uint8_t *element; 497 uint32_t uuid; 498 499 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 500 501 des_element = des_iterator_get_element(&des_list_it); 502 des_iterator_init(&prot_it, des_element); 503 element = des_iterator_get_element(&prot_it); 504 505 if (de_get_element_type(element) != DE_UUID) continue; 506 507 uuid = de_get_uuid32(element); 508 des_iterator_next(&prot_it); 509 switch (uuid){ 510 case BLUETOOTH_PROTOCOL_L2CAP: 511 if (!des_iterator_has_more(&prot_it)) continue; 512 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 513 break; 514 case BLUETOOTH_PROTOCOL_AVCTP: 515 if (!des_iterator_has_more(&prot_it)) continue; 516 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 517 break; 518 default: 519 break; 520 } 521 } 522 } 523 break; 524 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 525 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 526 if (!sdp_query_context->parse_sdp_record) break; 527 if (de_get_element_type(attribute_value) != DE_DES) break; 528 529 des_iterator_t des_list_0_it; 530 uint8_t *element_0; 531 532 des_iterator_init(&des_list_0_it, attribute_value); 533 element_0 = des_iterator_get_element(&des_list_0_it); 534 535 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 536 uint8_t *des_element; 537 uint8_t *element; 538 uint32_t uuid; 539 540 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 541 542 des_element = des_iterator_get_element(&des_list_it); 543 des_iterator_init(&prot_it, des_element); 544 element = des_iterator_get_element(&prot_it); 545 546 if (de_get_element_type(element) != DE_UUID) continue; 547 548 uuid = de_get_uuid32(element); 549 des_iterator_next(&prot_it); 550 switch (uuid){ 551 case BLUETOOTH_PROTOCOL_L2CAP: 552 if (!des_iterator_has_more(&prot_it)) continue; 553 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_l2cap_psm); 554 break; 555 case BLUETOOTH_PROTOCOL_AVCTP: 556 if (!des_iterator_has_more(&prot_it)) continue; 557 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); 558 break; 559 default: 560 break; 561 } 562 } 563 } 564 break; 565 default: 566 break; 567 } 568 } 569 } else { 570 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)); 571 } 572 break; 573 574 case SDP_EVENT_QUERY_COMPLETE:{ 575 status = sdp_event_query_complete_get_status(packet); 576 577 if (status != ERROR_CODE_SUCCESS){ 578 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 579 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 580 avrcp_finalize_connection(connection); 581 break; 582 } 583 584 if (!sdp_query_context->avrcp_l2cap_psm){ 585 connection->state = AVCTP_CONNECTION_IDLE; 586 log_info("AVRCP: no suitable service found"); 587 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 588 avrcp_finalize_connection(connection); 589 break; 590 } 591 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 592 l2cap_create_channel(&avrcp_packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 593 break; 594 } 595 } 596 } 597 598 static btstack_packet_handler_t avrcp_packet_handler_for_role(avrcp_role_t role){ 599 switch (role){ 600 case AVRCP_CONTROLLER: 601 return avrcp_controller_packet_handler; 602 case AVRCP_TARGET: 603 return avrcp_target_packet_handler; 604 } 605 return NULL; 606 } 607 608 static int avrcp_handle_incoming_connection_for_role(avrcp_role_t role, bd_addr_t event_addr, uint16_t local_cid){ 609 if (!avrcp_packet_handler_for_role(role)) { 610 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, PH not defined\n", role); 611 return 0; 612 } 613 614 avrcp_connection_t * connection = avrcp_create_connection(role, event_addr); 615 if (!connection) { 616 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d, no connection created\n", role); 617 return 0 ; 618 } 619 620 // printf("AVRCP: AVCTP_CONNECTION_W4_L2CAP_CONNECTED, role %d\n", role); 621 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 622 connection->l2cap_signaling_cid = local_cid; 623 return 1; 624 } 625 626 static void avrcp_handle_open_connection_for_role(avrcp_role_t role, bd_addr_t event_addr, uint16_t local_cid, uint16_t l2cap_mtu, uint8_t status){ 627 // printf("AVRCP: avrcp_handle_open_connection_for_role %d\n", role); 628 629 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 630 if (!packet_handler) { 631 // printf("AVRCP: avrcp_handle_open_connection_for_role %d, PH not defined\n", role); 632 return; 633 } 634 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(role, event_addr); 635 if (!connection) { 636 // printf("AVRCP: avrcp_handle_open_connection_for_role %d, no connection found\n", role); 637 return; 638 } 639 640 if (connection->state == AVCTP_CONNECTION_OPENED) return; 641 642 if (status != ERROR_CODE_SUCCESS){ 643 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 644 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, status); 645 avrcp_finalize_connection(connection); 646 return; 647 } 648 649 connection->l2cap_signaling_cid = local_cid; 650 connection->l2cap_mtu = l2cap_mtu; 651 connection->song_length_ms = 0xFFFFFFFF; 652 connection->song_position_ms = 0xFFFFFFFF; 653 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 654 655 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); 656 connection->state = AVCTP_CONNECTION_OPENED; 657 // emit twice for each role 658 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 659 } 660 661 static void avrcp_handle_close_connection_for_role(avrcp_role_t role,uint16_t local_cid){ 662 // printf("AVRCP: avrcp_handle_close_connection_for_role %d\n", role); 663 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 664 if (!packet_handler) return; 665 666 avrcp_connection_t * connection = get_avrcp_connection_for_l2cap_signaling_cid(role, local_cid); 667 if (!connection) return; 668 669 // printf("avrcp_handle_close_connection_for_role avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d\n", connection->avrcp_cid, connection->l2cap_signaling_cid, role); 670 671 avrcp_emit_connection_closed(packet_handler, connection->avrcp_cid); 672 avrcp_finalize_connection(connection); 673 } 674 675 static avrcp_role_t avrcp_role_from_transport_header(uint8_t transport_header){ 676 avrcp_frame_type_t frame_type = (avrcp_frame_type_t)((transport_header & 0x02) >> 1); 677 switch (frame_type){ 678 case AVRCP_COMMAND_FRAME: 679 return AVRCP_TARGET; 680 default: // AVRCP_RESPONSE_FRAME - make compiler happy 681 return AVRCP_CONTROLLER; 682 } 683 } 684 685 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 686 UNUSED(channel); 687 UNUSED(size); 688 bd_addr_t event_addr; 689 uint16_t local_cid; 690 uint16_t l2cap_mtu; 691 uint8_t status; 692 avrcp_connection_t * connection = NULL; 693 avrcp_role_t role; 694 btstack_packet_handler_t packet_handler; 695 uint8_t status_target; 696 uint8_t status_controller; 697 698 switch (packet_type) { 699 case L2CAP_DATA_PACKET: 700 role = avrcp_role_from_transport_header(packet[0]); 701 packet_handler = avrcp_packet_handler_for_role(role); 702 if (!packet_handler) return; 703 704 (*packet_handler)(packet_type, channel, packet, size); 705 break; 706 707 case HCI_EVENT_PACKET: 708 switch (hci_event_packet_get_type(packet)) { 709 710 case L2CAP_EVENT_INCOMING_CONNECTION: 711 l2cap_event_incoming_connection_get_address(packet, event_addr); 712 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 713 // create two connection objects (both) 714 status_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, event_addr, local_cid); 715 status_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid); 716 717 if (!status_target && !status_controller){ 718 l2cap_decline_connection(local_cid); 719 break; 720 } 721 722 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 723 l2cap_accept_connection(local_cid); 724 break; 725 726 case L2CAP_EVENT_CHANNEL_OPENED: 727 // printf("AVRCP: L2CAP_EVENT_CHANNEL_OPENED \n"); 728 l2cap_event_channel_opened_get_address(packet, event_addr); 729 status = l2cap_event_channel_opened_get_status(packet); 730 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 731 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 732 733 avrcp_handle_open_connection_for_role(AVRCP_TARGET, event_addr, local_cid, l2cap_mtu, status); 734 avrcp_handle_open_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid, l2cap_mtu, status); 735 break; 736 737 case L2CAP_EVENT_CHANNEL_CLOSED: 738 // data: event (8), len(8), channel (16) 739 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 740 avrcp_handle_close_connection_for_role(AVRCP_TARGET, local_cid); 741 avrcp_handle_close_connection_for_role(AVRCP_CONTROLLER, local_cid); 742 break; 743 744 case L2CAP_EVENT_CAN_SEND_NOW: 745 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 746 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, local_cid); 747 if (connection && connection->wait_to_send){ 748 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW target\n"); 749 connection->wait_to_send = 0; 750 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 751 break; 752 } 753 754 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_CONTROLLER, local_cid); 755 if (connection && connection->wait_to_send){ 756 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW controller\n"); 757 connection->wait_to_send = 0; 758 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 759 break; 760 } 761 break; 762 763 default: 764 break; 765 } 766 break; 767 default: 768 break; 769 } 770 } 771 772 uint8_t avrcp_connect(avrcp_role_t role, bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 773 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(context->role, bd_addr); 774 if (connection) return ERROR_CODE_COMMAND_DISALLOWED; 775 776 if (!sdp_client_ready()) return ERROR_CODE_COMMAND_DISALLOWED; 777 778 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 779 if (!packet_handler) return 0; 780 781 connection = avrcp_create_connection(role, bd_addr); 782 if (!connection) return BTSTACK_MEMORY_ALLOC_FAILED; 783 784 if (avrcp_cid){ 785 *avrcp_cid = connection->avrcp_cid; 786 } 787 context->avrcp_l2cap_psm = 0; 788 context->avrcp_version = 0; 789 context->avrcp_cid = connection->avrcp_cid; 790 connection->browsing_l2cap_psm = 0; 791 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 792 sdp_query_context = context; 793 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 794 return ERROR_CODE_SUCCESS; 795 } 796 797 void avrcp_init(void){ 798 connections = NULL; 799 if (l2cap_service_registered) return; 800 801 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, LEVEL_2); 802 if (status != ERROR_CODE_SUCCESS) return; 803 l2cap_service_registered = 1; 804 } 805 806 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 807 avrcp_controller_packet_handler = callback; 808 } 809 810 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 811 avrcp_target_packet_handler = callback; 812 } 813 814