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 <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "btstack.h" 46 #include "classic/avrcp.h" 47 #include "classic/avrcp_controller.h" 48 49 #define PSM_AVCTP BLUETOOTH_PROTOCOL_AVCTP 50 #define PSM_AVCTP_BROWSING 0x001b 51 52 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 53 54 static const char * default_avrcp_controller_service_name = "BTstack AVRCP Controller Service"; 55 static const char * default_avrcp_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 56 static const char * default_avrcp_target_service_name = "BTstack AVRCP Target Service"; 57 static const char * default_avrcp_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 58 59 static uint16_t avrcp_cid_counter = 0; 60 61 static avrcp_context_t * sdp_query_context; 62 static uint8_t attribute_value[1000]; 63 static const unsigned int attribute_value_buffer_size = sizeof(attribute_value); 64 65 static btstack_linked_list_t connections; 66 static btstack_packet_handler_t avrcp_controller_packet_handler; 67 static btstack_packet_handler_t avrcp_target_packet_handler; 68 static int l2cap_service_registered = 0; 69 70 static const char * avrcp_subunit_type_name[] = { 71 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 72 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 73 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 74 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 75 }; 76 77 const char * avrcp_subunit2str(uint16_t index){ 78 if (index <= 11) return avrcp_subunit_type_name[index]; 79 if (index >= 0x1C && index <= 0x1F) return avrcp_subunit_type_name[index - 0x10]; 80 return avrcp_subunit_type_name[16]; 81 } 82 83 static const char * avrcp_event_name[] = { 84 "ERROR", "PLAYBACK_STATUS_CHANGED", 85 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 86 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 87 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 88 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 89 }; 90 const char * avrcp_event2str(uint16_t index){ 91 if (index <= 0x0d) return avrcp_event_name[index]; 92 return avrcp_event_name[0]; 93 } 94 95 static const char * avrcp_operation_name[] = { 96 "NOT SUPPORTED", // 0x3B 97 "SKIP", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", "NOT SUPPORTED", 98 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", "NOT SUPPORTED", 99 "REWIND", "FAST_FORWARD", "NOT SUPPORTED", "FORWARD", "BACKWARD" // 0x4C 100 }; 101 const char * avrcp_operation2str(uint8_t index){ 102 if (index >= 0x3B && index <= 0x4C) return avrcp_operation_name[index - 0x3B]; 103 return avrcp_operation_name[0]; 104 } 105 106 static const char * avrcp_media_attribute_id_name[] = { 107 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 108 }; 109 const char * avrcp_attribute2str(uint8_t index){ 110 if (index >= 1 && index <= 7) return avrcp_media_attribute_id_name[index]; 111 return avrcp_media_attribute_id_name[0]; 112 } 113 114 static const char * avrcp_play_status_name[] = { 115 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 116 "ERROR" // 0xFF 117 }; 118 const char * avrcp_play_status2str(uint8_t index){ 119 if (index >= 1 && index <= 4) return avrcp_play_status_name[index]; 120 return avrcp_play_status_name[5]; 121 } 122 123 static const char * avrcp_ctype_name[] = { 124 "CONTROL", 125 "STATUS", 126 "SPECIFIC_INQUIRY", 127 "NOTIFY", 128 "GENERAL_INQUIRY", 129 "RESERVED5", 130 "RESERVED6", 131 "RESERVED7", 132 "NOT IMPLEMENTED IN REMOTE", 133 "ACCEPTED BY REMOTE", 134 "REJECTED BY REMOTE", 135 "IN_TRANSITION", 136 "IMPLEMENTED_STABLE", 137 "CHANGED_STABLE", 138 "RESERVED", 139 "INTERIM" 140 }; 141 const char * avrcp_ctype2str(uint8_t index){ 142 if (index < sizeof(avrcp_ctype_name)){ 143 return avrcp_ctype_name[index]; 144 } 145 return "NONE"; 146 } 147 148 static const char * avrcp_shuffle_mode_name[] = { 149 "SHUFFLE OFF", 150 "SHUFFLE ALL TRACKS", 151 "SHUFFLE GROUP" 152 }; 153 154 const char * avrcp_shuffle2str(uint8_t index){ 155 if (index >= 1 && index <= 3) return avrcp_shuffle_mode_name[index-1]; 156 return "NONE"; 157 } 158 159 static const char * avrcp_repeat_mode_name[] = { 160 "REPEAT OFF", 161 "REPEAT SINGLE TRACK", 162 "REPEAT ALL TRACKS", 163 "REPEAT GROUP" 164 }; 165 166 const char * avrcp_repeat2str(uint8_t index){ 167 if (index >= 1 && index <= 4) return avrcp_repeat_mode_name[index-1]; 168 return "NONE"; 169 } 170 171 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 172 uint8_t cmd_opcode_index = 5; 173 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 174 return packet[cmd_opcode_index]; 175 } 176 177 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 178 const char * service_name, const char * service_provider_name){ 179 uint8_t* attribute; 180 de_create_sequence(service); 181 182 // 0x0000 "Service Record Handle" 183 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 184 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 185 186 // 0x0001 "Service Class ID List" 187 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 188 attribute = de_push_sequence(service); 189 { 190 if (controller){ 191 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 192 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 193 } else { 194 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 195 } 196 } 197 de_pop_sequence(service, attribute); 198 199 // 0x0004 "Protocol Descriptor List" 200 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 201 attribute = de_push_sequence(service); 202 { 203 uint8_t* l2cpProtocol = de_push_sequence(attribute); 204 { 205 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 206 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); 207 } 208 de_pop_sequence(attribute, l2cpProtocol); 209 210 uint8_t* avctpProtocol = de_push_sequence(attribute); 211 { 212 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 213 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 214 } 215 de_pop_sequence(attribute, avctpProtocol); 216 } 217 de_pop_sequence(service, attribute); 218 219 // 0x0005 "Public Browse Group" 220 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 221 attribute = de_push_sequence(service); 222 { 223 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 224 } 225 de_pop_sequence(service, attribute); 226 227 // 0x0009 "Bluetooth Profile Descriptor List" 228 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 229 attribute = de_push_sequence(service); 230 { 231 uint8_t *avrcProfile = de_push_sequence(attribute); 232 { 233 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 234 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0105); 235 } 236 de_pop_sequence(attribute, avrcProfile); 237 } 238 de_pop_sequence(service, attribute); 239 240 // 0x000d "Additional Bluetooth Profile Descriptor List" 241 if (browsing){ 242 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 243 attribute = de_push_sequence(service); 244 { 245 uint8_t * des = de_push_sequence(attribute); 246 { 247 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 248 { 249 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 250 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, PSM_AVCTP_BROWSING); 251 } 252 de_pop_sequence(des, browsing_l2cpProtocol); 253 254 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 255 { 256 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 257 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0103); // version 258 } 259 de_pop_sequence(des, browsing_avctpProtocol); 260 } 261 de_pop_sequence(attribute, des); 262 } 263 de_pop_sequence(service, attribute); 264 } 265 266 267 // 0x0100 "Service Name" 268 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 269 if (service_name){ 270 de_add_data(service, DE_STRING, strlen(service_name), (uint8_t *) service_name); 271 } else { 272 if (controller){ 273 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_name), (uint8_t *) default_avrcp_controller_service_name); 274 } else { 275 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_name), (uint8_t *) default_avrcp_target_service_name); 276 } 277 } 278 279 // 0x0100 "Provider Name" 280 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 281 if (service_provider_name){ 282 de_add_data(service, DE_STRING, strlen(service_provider_name), (uint8_t *) service_provider_name); 283 } else { 284 if (controller){ 285 de_add_data(service, DE_STRING, strlen(default_avrcp_controller_service_provider_name), (uint8_t *) default_avrcp_controller_service_provider_name); 286 } else { 287 de_add_data(service, DE_STRING, strlen(default_avrcp_target_service_provider_name), (uint8_t *) default_avrcp_target_service_provider_name); 288 } 289 } 290 291 // 0x0311 "Supported Features" 292 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 293 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 294 } 295 296 avrcp_connection_t * get_avrcp_connection_for_bd_addr(avrcp_role_t role, bd_addr_t addr){ 297 btstack_linked_list_iterator_t it; 298 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 299 while (btstack_linked_list_iterator_has_next(&it)){ 300 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 301 if (connection->role != role) continue; 302 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 303 return connection; 304 } 305 return NULL; 306 } 307 308 avrcp_connection_t * get_avrcp_connection_for_l2cap_signaling_cid(avrcp_role_t role, uint16_t l2cap_cid){ 309 btstack_linked_list_iterator_t it; 310 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 311 while (btstack_linked_list_iterator_has_next(&it)){ 312 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 313 if (connection->role != role) continue; 314 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 315 return connection; 316 } 317 return NULL; 318 } 319 320 avrcp_connection_t * get_avrcp_connection_for_avrcp_cid(avrcp_role_t role, uint16_t avrcp_cid){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 325 if (connection->role != role) continue; 326 if (connection->avrcp_cid != avrcp_cid) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 avrcp_connection_t * get_avrcp_connection_for_browsing_cid(avrcp_role_t role, uint16_t browsing_cid){ 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 337 if (connection->role != role) continue; 338 if (connection->avrcp_browsing_cid != browsing_cid) continue; 339 return connection; 340 } 341 return NULL; 342 } 343 344 avrcp_connection_t * get_avrcp_connection_for_browsing_l2cap_cid(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 349 if (connection->role != role) continue; 350 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid) continue; 351 return connection; 352 } 353 return NULL; 354 } 355 356 avrcp_browsing_connection_t * get_avrcp_browsing_connection_for_l2cap_cid(avrcp_role_t role, uint16_t l2cap_cid){ 357 btstack_linked_list_iterator_t it; 358 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &connections); 359 while (btstack_linked_list_iterator_has_next(&it)){ 360 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 361 if (connection->role != role) continue; 362 if (connection->browsing_connection && connection->browsing_connection->l2cap_browsing_cid != l2cap_cid) continue; 363 return connection->browsing_connection; 364 } 365 return NULL; 366 } 367 368 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 369 // printf("AVRCP: avrcp_request_can_send_now, role %d\n", connection->role); 370 connection->wait_to_send = 1; 371 l2cap_request_can_send_now_event(l2cap_cid); 372 } 373 374 375 uint16_t avrcp_get_next_cid(void){ 376 avrcp_cid_counter++; 377 if (avrcp_cid_counter == 0){ 378 avrcp_cid_counter = 1; 379 } 380 return avrcp_cid_counter; 381 } 382 383 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 384 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 385 if (!connection){ 386 log_error("avrcp: not enough memory to create connection"); 387 return NULL; 388 } 389 390 connection->state = AVCTP_CONNECTION_IDLE; 391 connection->role = role; 392 connection->transaction_label = 0xFF; 393 connection->max_num_fragments = 0xFF; 394 connection->avrcp_cid = avrcp_get_next_cid(); 395 printf("created connection, role %d, avrcp cid 0x%02x\n", role, connection->avrcp_cid); 396 memcpy(connection->remote_addr, remote_addr, 6); 397 btstack_linked_list_add(&connections, (btstack_linked_item_t *) connection); 398 return connection; 399 } 400 401 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 402 btstack_linked_list_remove(&connections, (btstack_linked_item_t*) connection); 403 btstack_memory_avrcp_connection_free(connection); 404 } 405 406 void avrcp_emit_connection_established(btstack_packet_handler_t callback, uint16_t avrcp_cid, bd_addr_t addr, uint8_t status){ 407 if (!callback) return; 408 uint8_t event[12]; 409 int pos = 0; 410 event[pos++] = HCI_EVENT_AVRCP_META; 411 event[pos++] = sizeof(event) - 2; 412 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 413 event[pos++] = status; 414 reverse_bd_addr(addr,&event[pos]); 415 pos += 6; 416 little_endian_store_16(event, pos, avrcp_cid); 417 pos += 2; 418 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 419 } 420 421 void avrcp_emit_connection_closed(btstack_packet_handler_t callback, uint16_t avrcp_cid){ 422 if (!callback) return; 423 uint8_t event[5]; 424 int pos = 0; 425 event[pos++] = HCI_EVENT_AVRCP_META; 426 event[pos++] = sizeof(event) - 2; 427 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 428 little_endian_store_16(event, pos, avrcp_cid); 429 pos += 2; 430 (*callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 431 } 432 433 void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 434 avrcp_connection_t * connection = get_avrcp_connection_for_avrcp_cid(sdp_query_context->role, sdp_query_context->avrcp_cid); 435 if (!connection) return; 436 if (connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) return; 437 438 UNUSED(packet_type); 439 UNUSED(channel); 440 UNUSED(size); 441 uint8_t status; 442 des_iterator_t des_list_it; 443 des_iterator_t prot_it; 444 // uint32_t avdtp_remote_uuid = 0; 445 446 switch (hci_event_packet_get_type(packet)){ 447 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 448 // Handle new SDP record 449 if (sdp_event_query_attribute_byte_get_record_id(packet) != sdp_query_context->record_id) { 450 sdp_query_context->record_id = sdp_event_query_attribute_byte_get_record_id(packet); 451 sdp_query_context->parse_sdp_record = 0; 452 // log_info("SDP Record: Nr: %d", record_id); 453 } 454 455 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= attribute_value_buffer_size) { 456 attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 457 458 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 459 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 460 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 461 if (de_get_element_type(attribute_value) != DE_DES) break; 462 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 463 uint8_t * element = des_iterator_get_element(&des_list_it); 464 if (de_get_element_type(element) != DE_UUID) continue; 465 uint32_t uuid = de_get_uuid32(element); 466 switch (uuid){ 467 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 468 if (sdp_query_context->role == AVRCP_CONTROLLER) { 469 sdp_query_context->parse_sdp_record = 1; 470 break; 471 } 472 break; 473 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 474 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 475 if (sdp_query_context->role == AVRCP_TARGET) { 476 sdp_query_context->parse_sdp_record = 1; 477 break; 478 } 479 break; 480 default: 481 break; 482 } 483 } 484 break; 485 486 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 487 if (!sdp_query_context->parse_sdp_record) break; 488 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 489 for (des_iterator_init(&des_list_it, attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 490 uint8_t *des_element; 491 uint8_t *element; 492 uint32_t uuid; 493 494 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 495 496 des_element = des_iterator_get_element(&des_list_it); 497 des_iterator_init(&prot_it, des_element); 498 element = des_iterator_get_element(&prot_it); 499 500 if (de_get_element_type(element) != DE_UUID) continue; 501 502 uuid = de_get_uuid32(element); 503 des_iterator_next(&prot_it); 504 switch (uuid){ 505 case BLUETOOTH_PROTOCOL_L2CAP: 506 if (!des_iterator_has_more(&prot_it)) continue; 507 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_l2cap_psm); 508 break; 509 case BLUETOOTH_PROTOCOL_AVCTP: 510 if (!des_iterator_has_more(&prot_it)) continue; 511 de_element_get_uint16(des_iterator_get_element(&prot_it), &sdp_query_context->avrcp_version); 512 break; 513 default: 514 break; 515 } 516 } 517 } 518 break; 519 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 520 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 521 if (!sdp_query_context->parse_sdp_record) break; 522 if (de_get_element_type(attribute_value) != DE_DES) break; 523 524 des_iterator_t des_list_0_it; 525 uint8_t *element_0; 526 527 des_iterator_init(&des_list_0_it, attribute_value); 528 element_0 = des_iterator_get_element(&des_list_0_it); 529 530 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 531 uint8_t *des_element; 532 uint8_t *element; 533 uint32_t uuid; 534 535 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 536 537 des_element = des_iterator_get_element(&des_list_it); 538 des_iterator_init(&prot_it, des_element); 539 element = des_iterator_get_element(&prot_it); 540 541 if (de_get_element_type(element) != DE_UUID) continue; 542 543 uuid = de_get_uuid32(element); 544 des_iterator_next(&prot_it); 545 switch (uuid){ 546 case BLUETOOTH_PROTOCOL_L2CAP: 547 if (!des_iterator_has_more(&prot_it)) continue; 548 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_l2cap_psm); 549 break; 550 case BLUETOOTH_PROTOCOL_AVCTP: 551 if (!des_iterator_has_more(&prot_it)) continue; 552 de_element_get_uint16(des_iterator_get_element(&prot_it), &connection->browsing_version); 553 break; 554 default: 555 break; 556 } 557 } 558 } 559 break; 560 default: 561 break; 562 } 563 } 564 } else { 565 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)); 566 } 567 break; 568 569 case SDP_EVENT_QUERY_COMPLETE:{ 570 status = sdp_event_query_complete_get_status(packet); 571 572 if (status != ERROR_CODE_SUCCESS){ 573 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 574 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, status); 575 avrcp_finalize_connection(connection); 576 break; 577 } 578 579 if (!sdp_query_context->avrcp_l2cap_psm){ 580 connection->state = AVCTP_CONNECTION_IDLE; 581 log_info("AVRCP: no suitable service found"); 582 avrcp_emit_connection_established(sdp_query_context->avrcp_callback, connection->avrcp_cid, connection->remote_addr, SDP_SERVICE_NOT_FOUND); 583 avrcp_finalize_connection(connection); 584 break; 585 } 586 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 587 printf("l2cap_create_channel\n"); 588 l2cap_create_channel(&avrcp_packet_handler, connection->remote_addr, sdp_query_context->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 589 break; 590 } 591 } 592 } 593 594 static btstack_packet_handler_t avrcp_packet_handler_for_role(avrcp_role_t role){ 595 switch (role){ 596 case AVRCP_CONTROLLER: 597 return avrcp_controller_packet_handler; 598 case AVRCP_TARGET: 599 return avrcp_target_packet_handler; 600 } 601 return NULL; 602 } 603 604 static int avrcp_handle_incoming_connection_for_role(avrcp_role_t role, bd_addr_t event_addr, uint16_t local_cid){ 605 // printf("AVRCP: avrcp_handle_incoming_connection_for_role %d\n", role); 606 if (!avrcp_packet_handler_for_role(role)) return 0; 607 608 avrcp_connection_t * connection = avrcp_create_connection(role, event_addr); 609 if (!connection) { 610 log_error("Failed to alloc target connection structure"); 611 return 0; 612 } 613 // printf("AVRCP: AVCTP_CONNECTION_W4_L2CAP_CONNECTED, role %d\n", role); 614 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 615 connection->l2cap_signaling_cid = local_cid; 616 return 1; 617 } 618 619 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){ 620 // printf("AVRCP: avrcp_handle_open_connection_for_role %d\n", role); 621 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 622 if (!packet_handler) return; 623 624 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(role, event_addr); 625 if (!connection) return; 626 627 if (status != ERROR_CODE_SUCCESS){ 628 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 629 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, status); 630 avrcp_finalize_connection(connection); 631 return; 632 } 633 634 connection->l2cap_signaling_cid = local_cid; 635 connection->l2cap_mtu = l2cap_mtu; 636 connection->song_length_ms = 0xFFFFFFFF; 637 connection->song_position_ms = 0xFFFFFFFF; 638 connection->playback_status = AVRCP_PLAYBACK_STATUS_ERROR; 639 640 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); 641 connection->state = AVCTP_CONNECTION_OPENED; 642 // emit twice for each role 643 avrcp_emit_connection_established(packet_handler, connection->avrcp_cid, event_addr, ERROR_CODE_SUCCESS); 644 } 645 646 static void avrcp_handle_close_connection_for_role(avrcp_role_t role,uint16_t local_cid){ 647 // printf("AVRCP: avrcp_handle_close_connection_for_role %d\n", role); 648 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 649 if (!packet_handler) return; 650 651 avrcp_connection_t * connection = get_avrcp_connection_for_l2cap_signaling_cid(role, local_cid); 652 if (!connection) return; 653 654 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); 655 656 avrcp_emit_connection_closed(packet_handler, connection->avrcp_cid); 657 avrcp_finalize_connection(connection); 658 } 659 660 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 661 UNUSED(channel); 662 UNUSED(size); 663 bd_addr_t event_addr; 664 uint16_t local_cid; 665 uint16_t l2cap_mtu; 666 uint8_t status; 667 avrcp_connection_t * connection = NULL; 668 669 avrcp_connection_t * controller_connection = NULL; 670 avrcp_connection_t * target_connection = NULL; 671 672 switch (packet_type) { 673 case L2CAP_DATA_PACKET: 674 // figure out role! for now send to both 675 controller_connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_CONTROLLER, channel); 676 target_connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, channel); 677 678 // call correct controller/target packet hander 679 if (controller_connection && avrcp_controller_packet_handler){ 680 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 681 } 682 683 if (target_connection && avrcp_target_packet_handler) { 684 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 685 } 686 break; 687 688 case HCI_EVENT_PACKET: 689 switch (hci_event_packet_get_type(packet)) { 690 691 case L2CAP_EVENT_INCOMING_CONNECTION: 692 // printf("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION \n"); 693 l2cap_event_incoming_connection_get_address(packet, event_addr); 694 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 695 // create two connection objects (both) 696 if (!avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, event_addr, local_cid) && 697 !avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid)){ 698 l2cap_decline_connection(local_cid); 699 break; 700 } 701 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION avrcp_cid 0x%02x", local_cid); 702 l2cap_accept_connection(local_cid); 703 break; 704 705 case L2CAP_EVENT_CHANNEL_OPENED: 706 // printf("AVRCP: L2CAP_EVENT_CHANNEL_OPENED \n"); 707 l2cap_event_channel_opened_get_address(packet, event_addr); 708 status = l2cap_event_channel_opened_get_status(packet); 709 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 710 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 711 712 avrcp_handle_open_connection_for_role(AVRCP_TARGET, event_addr, local_cid, l2cap_mtu, status); 713 avrcp_handle_open_connection_for_role(AVRCP_CONTROLLER, event_addr, local_cid, l2cap_mtu, status); 714 break; 715 716 case L2CAP_EVENT_CHANNEL_CLOSED: 717 // data: event (8), len(8), channel (16) 718 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 719 avrcp_handle_close_connection_for_role(AVRCP_TARGET, local_cid); 720 avrcp_handle_close_connection_for_role(AVRCP_CONTROLLER, local_cid); 721 break; 722 723 case L2CAP_EVENT_CAN_SEND_NOW: 724 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW\n"); 725 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 726 727 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_TARGET, local_cid); 728 if (connection && connection->wait_to_send){ 729 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW target\n"); 730 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 731 break; 732 } 733 734 connection = get_avrcp_connection_for_l2cap_signaling_cid(AVRCP_CONTROLLER, local_cid); 735 if (connection && connection->wait_to_send){ 736 // printf("AVRCP: L2CAP_EVENT_CAN_SEND_NOW controller\n"); 737 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 738 break; 739 } 740 break; 741 742 default: 743 break; 744 } 745 break; 746 default: 747 break; 748 } 749 } 750 751 uint8_t avrcp_connect(avrcp_role_t role, bd_addr_t bd_addr, avrcp_context_t * context, uint16_t * avrcp_cid){ 752 avrcp_connection_t * connection = get_avrcp_connection_for_bd_addr(context->role, bd_addr); 753 if (connection) return ERROR_CODE_COMMAND_DISALLOWED; 754 755 if (!sdp_client_ready()) return ERROR_CODE_COMMAND_DISALLOWED; 756 757 btstack_packet_handler_t packet_handler = avrcp_packet_handler_for_role(role); 758 if (!packet_handler) return 0; 759 760 connection = avrcp_create_connection(role, bd_addr); 761 if (!connection){ 762 log_error("avrcp: could not allocate connection struct."); 763 return BTSTACK_MEMORY_ALLOC_FAILED; 764 } 765 766 if (avrcp_cid){ 767 *avrcp_cid = connection->avrcp_cid; 768 } 769 context->avrcp_l2cap_psm = 0; 770 context->avrcp_version = 0; 771 context->avrcp_cid = connection->avrcp_cid; 772 connection->browsing_l2cap_psm = 0; 773 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 774 sdp_query_context = context; 775 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 776 return ERROR_CODE_SUCCESS; 777 } 778 779 void avrcp_init(void){ 780 connections = NULL; 781 if (l2cap_service_registered) return; 782 783 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PROTOCOL_AVCTP, 0xffff, LEVEL_2); 784 if (status != ERROR_CODE_SUCCESS) return; 785 l2cap_service_registered = 1; 786 } 787 788 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 789 avrcp_controller_packet_handler = callback; 790 } 791 792 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 793 avrcp_target_packet_handler = callback; 794 } 795 796