1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 // snprintf 43 #include <stdio.h> 44 45 #include "bluetooth_psm.h" 46 #include "bluetooth_sdp.h" 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "btstack_memory.h" 50 #include "classic/avrcp.h" 51 #include "classic/sdp_client.h" 52 #include "classic/sdp_util.h" 53 54 55 typedef struct { 56 uint8_t parse_sdp_record; 57 uint32_t record_id; 58 uint16_t avrcp_cid; 59 uint16_t avrcp_l2cap_psm; 60 uint16_t avrcp_version; 61 62 uint16_t browsing_l2cap_psm; 63 uint16_t browsing_version; 64 uint16_t cover_art_l2cap_psm; 65 } avrcp_sdp_query_context_t; 66 67 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 68 static void avrcp_start_next_sdp_query(void); 69 70 static const char * avrcp_default_controller_service_name = "AVRCP Controller"; 71 static const char * avrcp_default_controller_service_provider_name = "BlueKitchen"; 72 static const char * avrcp_default_target_service_name = "AVRCP Target"; 73 static const char * avrcp_default_target_service_provider_name = "BlueKitchen"; 74 75 static const char * avrcp_subunit_type_name[] = { 76 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 77 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 78 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 79 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 80 }; 81 82 // default subunit info: single PANEL subunit 83 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 84 85 // globals 86 static bool avrcp_l2cap_service_registered = false; 87 88 // connections 89 static uint16_t avrcp_cid_counter; 90 static btstack_linked_list_t avrcp_connections; 91 92 // higher layer callbacks 93 static btstack_packet_handler_t avrcp_callback; 94 static btstack_packet_handler_t avrcp_controller_packet_handler; 95 static btstack_packet_handler_t avrcp_target_packet_handler; 96 97 // sdp query 98 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 99 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 100 static uint8_t avrcp_sdp_query_attribute_value[45]; 101 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 102 103 static void (*avrcp_browsing_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 104 #ifdef ENABLE_AVRCP_COVER_ART 105 static void (*avrcp_cover_art_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 106 #endif 107 108 const char * avrcp_subunit2str(uint16_t index){ 109 if (index <= 11) return avrcp_subunit_type_name[index]; 110 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 111 return avrcp_subunit_type_name[16]; 112 } 113 114 static const char * avrcp_event_name[] = { 115 "ERROR", "PLAYBACK_STATUS_CHANGED", 116 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 117 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 118 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 119 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 120 }; 121 const char * avrcp_event2str(uint16_t index){ 122 if (index <= 0x0d) return avrcp_event_name[index]; 123 return avrcp_event_name[0]; 124 } 125 126 static const char * avrcp_operation_name[] = { 127 "SKIP", NULL, NULL, NULL, NULL, 128 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 129 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 130 }; 131 132 const char * avrcp_operation2str(uint8_t operation_id){ 133 char * name = NULL; 134 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 135 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 136 } 137 if (name == NULL){ 138 static char buffer[13]; 139 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 140 buffer[sizeof(buffer)-1] = 0; 141 return buffer; 142 } else { 143 return name; 144 } 145 } 146 147 static const char * avrcp_media_attribute_id_name[] = { 148 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 149 }; 150 const char * avrcp_attribute2str(uint8_t index){ 151 if (index > 7){ 152 index = 0; 153 } 154 return avrcp_media_attribute_id_name[0]; 155 } 156 157 static const char * avrcp_play_status_name[] = { 158 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 159 "ERROR" // 0xFF 160 }; 161 const char * avrcp_play_status2str(uint8_t index){ 162 if (index > 4){ 163 index = 5; 164 } 165 return avrcp_play_status_name[index]; 166 } 167 168 static const char * avrcp_ctype_name[] = { 169 "CONTROL", 170 "STATUS", 171 "SPECIFIC_INQUIRY", 172 "NOTIFY", 173 "GENERAL_INQUIRY", 174 "RESERVED5", 175 "RESERVED6", 176 "RESERVED7", 177 "NOT IMPLEMENTED IN REMOTE", 178 "ACCEPTED BY REMOTE", 179 "REJECTED BY REMOTE", 180 "IN_TRANSITION", 181 "IMPLEMENTED_STABLE", 182 "CHANGED_STABLE", 183 "RESERVED", 184 "INTERIM" 185 }; 186 static const uint16_t avrcp_ctype_name_num = 16; 187 188 const char * avrcp_ctype2str(uint8_t index){ 189 if (index < avrcp_ctype_name_num){ 190 return avrcp_ctype_name[index]; 191 } 192 return "NONE"; 193 } 194 195 static const char * avrcp_shuffle_mode_name[] = { 196 "SHUFFLE OFF", 197 "SHUFFLE ALL TRACKS", 198 "SHUFFLE GROUP" 199 }; 200 201 const char * avrcp_shuffle2str(uint8_t index){ 202 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 203 return "NONE"; 204 } 205 206 static const char * avrcp_repeat_mode_name[] = { 207 "REPEAT OFF", 208 "REPEAT SINGLE TRACK", 209 "REPEAT ALL TRACKS", 210 "REPEAT GROUP" 211 }; 212 213 const char * avrcp_repeat2str(uint8_t index){ 214 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 215 return "NONE"; 216 } 217 218 static const char * notification_name[] = { 219 "INVALID_INDEX", 220 "PLAYBACK_STATUS_CHANGED", 221 "TRACK_CHANGED", 222 "TRACK_REACHED_END", 223 "TRACK_REACHED_START", 224 "PLAYBACK_POS_CHANGED", 225 "BATT_STATUS_CHANGED", 226 "SYSTEM_STATUS_CHANGED", 227 "PLAYER_APPLICATION_SETTING_CHANGED", 228 "NOW_PLAYING_CONTENT_CHANGED", 229 "AVAILABLE_PLAYERS_CHANGED", 230 "ADDRESSED_PLAYER_CHANGED", 231 "UIDS_CHANGED", 232 "VOLUME_CHANGED", 233 "MAX_VALUE" 234 }; 235 236 const char * avrcp_notification2str(avrcp_notification_event_id_t index){ 237 if ((index >= AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) && (index <= AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 238 return notification_name[index]; 239 } 240 return notification_name[0]; 241 } 242 243 btstack_linked_list_t avrcp_get_connections(void){ 244 return avrcp_connections; 245 } 246 247 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 248 uint8_t cmd_opcode_index = 5; 249 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 250 return packet[cmd_opcode_index]; 251 } 252 253 void avrcp_create_sdp_record(bool controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 254 const char * service_name, const char * service_provider_name){ 255 uint8_t* attribute; 256 de_create_sequence(service); 257 258 // 0x0000 "Service Record Handle" 259 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 260 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 261 262 // 0x0001 "Service Class ID List" 263 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 264 attribute = de_push_sequence(service); 265 { 266 if (controller){ 267 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 268 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 269 } else { 270 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 271 } 272 } 273 de_pop_sequence(service, attribute); 274 275 // 0x0004 "Protocol Descriptor List" 276 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 277 attribute = de_push_sequence(service); 278 { 279 uint8_t* l2cpProtocol = de_push_sequence(attribute); 280 { 281 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 282 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 283 } 284 de_pop_sequence(attribute, l2cpProtocol); 285 286 uint8_t* avctpProtocol = de_push_sequence(attribute); 287 { 288 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 289 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 290 } 291 de_pop_sequence(attribute, avctpProtocol); 292 } 293 de_pop_sequence(service, attribute); 294 295 // 0x0005 "Public Browse Group" 296 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 297 attribute = de_push_sequence(service); 298 { 299 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 300 } 301 de_pop_sequence(service, attribute); 302 303 // 0x0009 "Bluetooth Profile Descriptor List" 304 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 305 attribute = de_push_sequence(service); 306 { 307 uint8_t *avrcProfile = de_push_sequence(attribute); 308 { 309 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 310 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 311 } 312 de_pop_sequence(attribute, avrcProfile); 313 } 314 de_pop_sequence(service, attribute); 315 316 // 0x000d "Additional Bluetooth Profile Descriptor List" 317 if (browsing){ 318 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 319 attribute = de_push_sequence(service); 320 { 321 uint8_t * des = de_push_sequence(attribute); 322 { 323 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 324 { 325 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 326 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 327 } 328 de_pop_sequence(des, browsing_l2cpProtocol); 329 330 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 331 { 332 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 333 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 334 } 335 de_pop_sequence(des, browsing_avctpProtocol); 336 } 337 de_pop_sequence(attribute, des); 338 } 339 de_pop_sequence(service, attribute); 340 } 341 342 343 // 0x0100 "Service Name" 344 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 345 if (service_name){ 346 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 347 } else { 348 if (controller){ 349 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 350 } else { 351 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_target_service_name), (uint8_t *) avrcp_default_target_service_name); 352 } 353 } 354 355 // 0x0100 "Provider Name" 356 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 357 if (service_provider_name){ 358 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 359 } else { 360 if (controller){ 361 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 362 } else { 363 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 364 } 365 } 366 367 // 0x0311 "Supported Features" 368 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SUPPORTED_FEATURES); 369 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 370 } 371 372 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 373 switch (avctp_packet_type){ 374 case AVCTP_SINGLE_PACKET: 375 // AVCTP message: transport header (1), pid (2) 376 return 3; 377 case AVCTP_START_PACKET: 378 // AVCTP message: transport header (1), num_packets (1), pid (2) 379 return 4; 380 default: 381 // AVCTP message: transport header (1) 382 return 1; 383 } 384 } 385 386 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 387 switch (avctp_packet_type){ 388 case AVCTP_SINGLE_PACKET: 389 case AVCTP_START_PACKET: 390 break; 391 default: 392 return 0; 393 } 394 395 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 396 switch (command_opcode){ 397 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 398 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 399 break; 400 case AVRCP_CMD_OPCODE_PASS_THROUGH: 401 offset += 3; // AVRCP message: operation id (1), param_len (2) 402 break; 403 default: 404 break; 405 } 406 return offset; 407 } 408 409 static uint16_t avrcp_get_num_free_bytes_for_payload(uint16_t l2cap_mtu, avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type){ 410 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 411 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 412 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 413 414 btstack_assert(max_frame_size >= payload_offset); 415 return (max_frame_size - payload_offset); 416 } 417 418 419 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 420 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 421 return AVCTP_SINGLE_PACKET; 422 } 423 424 if (connection->data_offset == 0){ 425 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 426 connection->command_opcode, 427 AVCTP_SINGLE_PACKET); 428 if (max_payload_size_for_single_packet >= connection->data_len){ 429 *max_payload_size = max_payload_size_for_single_packet; 430 return AVCTP_SINGLE_PACKET; 431 } else { 432 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 433 *max_payload_size = max_payload_size_for_start_packet; 434 return AVCTP_START_PACKET; 435 } 436 } else { 437 // both packet types have the same single byte AVCTP header 438 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 439 connection->command_opcode, 440 AVCTP_CONTINUE_PACKET); 441 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 442 return AVCTP_CONTINUE_PACKET; 443 } else { 444 return AVCTP_END_PACKET; 445 } 446 } 447 } 448 449 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 450 switch (connection->avctp_packet_type) { 451 case AVCTP_SINGLE_PACKET: 452 case AVCTP_START_PACKET: 453 break; 454 default: 455 return connection->avrcp_packet_type; 456 } 457 458 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 459 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 460 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 461 462 if (connection->data_offset == 0){ 463 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 464 return AVRCP_SINGLE_PACKET; 465 } else { 466 return AVRCP_START_PACKET; 467 } 468 } else { 469 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 470 return AVRCP_CONTINUE_PACKET; 471 } else { 472 return AVRCP_END_PACKET; 473 } 474 } 475 } 476 477 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 478 btstack_linked_list_iterator_t it; 479 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 480 while (btstack_linked_list_iterator_has_next(&it)){ 481 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 482 if (connection->role != role) continue; 483 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 484 return connection; 485 } 486 return NULL; 487 } 488 489 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 490 btstack_linked_list_iterator_t it; 491 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 492 while (btstack_linked_list_iterator_has_next(&it)){ 493 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 494 if (connection->role != role) continue; 495 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 496 return connection; 497 } 498 return NULL; 499 } 500 501 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 502 btstack_linked_list_iterator_t it; 503 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 504 while (btstack_linked_list_iterator_has_next(&it)){ 505 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 506 if (connection->role != role) continue; 507 if (connection->avrcp_cid != avrcp_cid) continue; 508 return connection; 509 } 510 return NULL; 511 } 512 513 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 514 btstack_linked_list_iterator_t it; 515 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 516 while (btstack_linked_list_iterator_has_next(&it)){ 517 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 518 if (connection->role != role) continue; 519 if (connection->avrcp_browsing_cid != browsing_cid) continue; 520 return connection; 521 } 522 return NULL; 523 } 524 525 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 526 btstack_linked_list_iterator_t it; 527 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 528 while (btstack_linked_list_iterator_has_next(&it)){ 529 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 530 if (connection->role != role) continue; 531 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 532 return connection; 533 } 534 return NULL; 535 } 536 537 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 538 btstack_linked_list_iterator_t it; 539 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 540 while (btstack_linked_list_iterator_has_next(&it)){ 541 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 542 if (connection->role != role) continue; 543 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 544 return connection->browsing_connection; 545 } 546 return NULL; 547 } 548 549 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 550 connection->wait_to_send = true; 551 l2cap_request_can_send_now_event(l2cap_cid); 552 } 553 554 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 555 do { 556 if (avrcp_cid_counter == 0xffff) { 557 avrcp_cid_counter = 1; 558 } else { 559 avrcp_cid_counter++; 560 } 561 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 562 return avrcp_cid_counter; 563 } 564 565 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 566 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 567 if (!connection){ 568 log_error("Not enough memory to create connection for role %d", role); 569 return NULL; 570 } 571 572 connection->state = AVCTP_CONNECTION_IDLE; 573 connection->role = role; 574 575 connection->transaction_id = 0xFF; 576 connection->transaction_id_counter = 0; 577 578 connection->controller_max_num_fragments = 0xFF; 579 580 // setup default unit / subunit info 581 connection->company_id = 0xffffff; 582 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 583 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 584 connection->target_subunit_info_data = avrcp_default_subunit_info; 585 586 log_info("avrcp_create_connection, role %d", role); 587 (void)memcpy(connection->remote_addr, remote_addr, 6); 588 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 589 return connection; 590 } 591 592 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 593 btstack_run_loop_remove_timer(&connection->retry_timer); 594 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 595 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 596 btstack_memory_avrcp_connection_free(connection); 597 } 598 599 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 600 btstack_assert(avrcp_callback != NULL); 601 602 uint8_t event[14]; 603 int pos = 0; 604 event[pos++] = HCI_EVENT_AVRCP_META; 605 event[pos++] = sizeof(event) - 2; 606 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 607 event[pos++] = status; 608 little_endian_store_16(event, pos, avrcp_cid); 609 pos += 2; 610 reverse_bd_addr(addr,&event[pos]); 611 pos += 6; 612 little_endian_store_16(event, pos, con_handle); 613 pos += 2; 614 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 615 } 616 617 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 618 btstack_assert(avrcp_callback != NULL); 619 620 uint8_t event[5]; 621 int pos = 0; 622 event[pos++] = HCI_EVENT_AVRCP_META; 623 event[pos++] = sizeof(event) - 2; 624 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 625 little_endian_store_16(event, pos, avrcp_cid); 626 pos += 2; 627 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 628 } 629 630 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 631 return avrcp_sdp_query_context.browsing_l2cap_psm; 632 } 633 634 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 635 des_iterator_t des_list_it; 636 637 des_iterator_t additional_protocol_descriptor_list_it; 638 des_iterator_t protocol_descriptor_list_it; 639 des_iterator_t protocol_it; 640 uint8_t protocol_descriptor_id; 641 642 // Handle new SDP record 643 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 644 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 645 avrcp_sdp_query_context.parse_sdp_record = 0; 646 // log_info("SDP Record: Nr: %d", record_id); 647 } 648 649 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 650 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 651 652 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 653 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 654 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 655 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 656 for (des_iterator_init(&des_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 657 uint8_t * element = des_iterator_get_element(&des_list_it); 658 if (de_get_element_type(element) != DE_UUID) continue; 659 uint32_t uuid = de_get_uuid32(element); 660 switch (uuid){ 661 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 662 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 663 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 664 avrcp_sdp_query_context.parse_sdp_record = 1; 665 break; 666 default: 667 break; 668 } 669 } 670 break; 671 672 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: 673 if (!avrcp_sdp_query_context.parse_sdp_record) break; 674 675 for (des_iterator_init(&protocol_descriptor_list_it, avrcp_sdp_query_attribute_value); des_iterator_has_more(&protocol_descriptor_list_it); des_iterator_next(&protocol_descriptor_list_it)) { 676 677 if (des_iterator_get_type(&protocol_descriptor_list_it) != DE_DES) continue; 678 uint8_t * protocol_descriptor_list_element = des_iterator_get_element(&protocol_descriptor_list_it); 679 680 des_iterator_init(&protocol_it, protocol_descriptor_list_element); 681 uint8_t * protocol_element = des_iterator_get_element(&protocol_it); 682 683 if (de_get_element_type(protocol_element) != DE_UUID) continue; 684 685 uint32_t uuid = de_get_uuid32(protocol_element); 686 des_iterator_next(&protocol_it); 687 switch (uuid){ 688 case BLUETOOTH_PROTOCOL_L2CAP: 689 if (!des_iterator_has_more(&protocol_it)) continue; 690 de_element_get_uint16(des_iterator_get_element(&protocol_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 691 break; 692 case BLUETOOTH_PROTOCOL_AVCTP: 693 if (!des_iterator_has_more(&protocol_it)) continue; 694 de_element_get_uint16(des_iterator_get_element(&protocol_it), &avrcp_sdp_query_context.avrcp_version); 695 break; 696 default: 697 break; 698 } 699 } 700 break; 701 702 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: 703 if (!avrcp_sdp_query_context.parse_sdp_record) break; 704 705 protocol_descriptor_id = 0; 706 707 for ( des_iterator_init(&additional_protocol_descriptor_list_it, avrcp_sdp_query_attribute_value); 708 des_iterator_has_more(&additional_protocol_descriptor_list_it); 709 des_iterator_next(&additional_protocol_descriptor_list_it)) { 710 711 if (des_iterator_get_type(&additional_protocol_descriptor_list_it) != DE_DES) continue; 712 uint8_t *additional_protocol_descriptor_element = des_iterator_get_element(&additional_protocol_descriptor_list_it); 713 714 for ( des_iterator_init(&protocol_descriptor_list_it,additional_protocol_descriptor_element); 715 des_iterator_has_more(&protocol_descriptor_list_it); 716 des_iterator_next(&protocol_descriptor_list_it)) { 717 718 if (des_iterator_get_type(&protocol_descriptor_list_it) != DE_DES) continue; 719 720 uint8_t * protocol_descriptor_list_element = des_iterator_get_element(&protocol_descriptor_list_it); 721 722 des_iterator_init(&protocol_it, protocol_descriptor_list_element); 723 uint8_t * protocol_element = des_iterator_get_element(&protocol_it); 724 725 if (de_get_element_type(protocol_element) != DE_UUID) continue; 726 727 uint32_t uuid = de_get_uuid32(protocol_element); 728 des_iterator_next(&protocol_it); 729 switch (uuid) { 730 case BLUETOOTH_PROTOCOL_L2CAP: 731 if (!des_iterator_has_more(&protocol_it)) continue; 732 switch (protocol_descriptor_id) { 733 case 0: 734 de_element_get_uint16(des_iterator_get_element(&protocol_it), 735 &avrcp_sdp_query_context.browsing_l2cap_psm); 736 break; 737 case 1: 738 de_element_get_uint16(des_iterator_get_element(&protocol_it), 739 &avrcp_sdp_query_context.cover_art_l2cap_psm); 740 break; 741 default: 742 break; 743 } 744 break; 745 case BLUETOOTH_PROTOCOL_AVCTP: 746 if (!des_iterator_has_more(&protocol_it)) continue; 747 de_element_get_uint16(des_iterator_get_element(&protocol_it), 748 &avrcp_sdp_query_context.browsing_version); 749 break; 750 default: 751 break; 752 } 753 } 754 protocol_descriptor_id++; 755 } 756 break; 757 758 default: 759 break; 760 } 761 } 762 } else { 763 log_error("SDP attribute value buffer size exceeded: available %d, required %d", avrcp_sdp_query_attribute_value_buffer_size, sdp_event_query_attribute_byte_get_attribute_length(packet)); 764 } 765 } 766 767 static void avrcp_signaling_handle_sdp_query_complete(avrcp_connection_t * connection, uint8_t status){ 768 769 // l2cap available? 770 if (status == ERROR_CODE_SUCCESS){ 771 if (avrcp_sdp_query_context.avrcp_l2cap_psm == 0){ 772 status = SDP_SERVICE_NOT_FOUND; 773 } 774 } 775 776 if (status == ERROR_CODE_SUCCESS){ 777 // ready to connect 778 connection->state = AVCTP_CONNECTION_W2_L2CAP_CONNECT; 779 780 // check if both events have been handled 781 avrcp_connection_t * connection_with_opposite_role; 782 switch (connection->role){ 783 case AVRCP_CONTROLLER: 784 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 785 break; 786 case AVRCP_TARGET: 787 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 788 break; 789 default: 790 btstack_assert(false); 791 return; 792 } 793 if (connection_with_opposite_role->state == AVCTP_CONNECTION_W2_L2CAP_CONNECT){ 794 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 795 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 796 l2cap_create_channel(&avrcp_packet_handler, connection->remote_addr, connection->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 797 } 798 } else { 799 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 800 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 801 avrcp_finalize_connection(connection); 802 } 803 } 804 805 static void avrcp_handle_sdp_query_completed(avrcp_connection_t * connection, uint8_t status){ 806 btstack_assert(connection != NULL); 807 808 // cache SDP result on success 809 if (status == ERROR_CODE_SUCCESS){ 810 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 811 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 812 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 813 #ifdef ENABLE_AVRCP_COVER_ART 814 connection->cover_art_psm = avrcp_sdp_query_context.cover_art_l2cap_psm; 815 #endif 816 } 817 818 // SDP Signaling Query? 819 if (connection->state == AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE){ 820 avrcp_signaling_handle_sdp_query_complete(connection, status); 821 return; 822 } 823 // Browsing SDP <- Browsing Connection <- Existing AVRCP Connection => it wasn't an SDP query for signaling 824 if (avrcp_browsing_sdp_query_complete_handler != NULL){ 825 (*avrcp_browsing_sdp_query_complete_handler)(connection, status); 826 } 827 #ifdef ENABLE_AVRCP_COVER_ART 828 // Cover Art SDP <- Cover Art Connection <- Existing AVRCP Connection => it wasn't an SDP query for signaling 829 if (avrcp_cover_art_sdp_query_complete_handler != NULL){ 830 (*avrcp_cover_art_sdp_query_complete_handler)(connection, status); 831 } 832 #endif 833 } 834 835 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 836 UNUSED(packet_type); 837 UNUSED(channel); 838 UNUSED(size); 839 840 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 841 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 842 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 843 844 if (!state_ok){ 845 // something wrong, nevertheless, start next sdp query if this one is complete 846 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 847 avrcp_sdp_query_context.avrcp_cid = 0; 848 avrcp_start_next_sdp_query(); 849 } 850 return; 851 } 852 853 uint8_t status; 854 855 switch (hci_event_packet_get_type(packet)){ 856 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 857 avrcp_handle_sdp_client_query_attribute_value(packet); 858 return; 859 860 case SDP_EVENT_QUERY_COMPLETE: 861 // handle result 862 status = sdp_event_query_complete_get_status(packet); 863 avrcp_handle_sdp_query_completed(avrcp_controller_connection, status); 864 avrcp_handle_sdp_query_completed(avrcp_target_connection, status); 865 866 // query done, start next one 867 avrcp_sdp_query_context.avrcp_cid = 0; 868 avrcp_start_next_sdp_query(); 869 break; 870 871 default: 872 return; 873 } 874 875 } 876 877 static void avrcp_handle_start_sdp_client_query(void * context){ 878 UNUSED(context); 879 880 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 881 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 882 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 883 if (state_ok == false){ 884 // connection seems to got finalized in the meantime, just trigger next query 885 avrcp_start_next_sdp_query(); 886 return; 887 } 888 889 // prevent triggering SDP query twice (for each role once) 890 avrcp_target_connection->trigger_sdp_query = false; 891 avrcp_controller_connection->trigger_sdp_query = false; 892 893 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, avrcp_target_connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 894 } 895 896 static void avrcp_start_next_sdp_query(void) { 897 if (avrcp_sdp_query_context.avrcp_cid != 0) { 898 return; 899 } 900 btstack_linked_list_iterator_t it; 901 btstack_linked_list_iterator_init(&it, &avrcp_connections); 902 while (btstack_linked_list_iterator_has_next(&it)){ 903 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 904 if (connection->trigger_sdp_query == false) continue; 905 906 // we're ready => setup avrcp_sdp_query_context and request sdp query 907 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 908 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 909 avrcp_sdp_query_context.avrcp_version = 0; 910 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 911 uint8_t status = sdp_client_register_query_callback(&avrcp_sdp_query_registration); 912 btstack_assert(status == ERROR_CODE_SUCCESS); 913 UNUSED(status); 914 break; 915 } 916 } 917 918 static avrcp_connection_t * avrcp_handle_incoming_connection_for_role(avrcp_role_t role, avrcp_connection_t * connection, bd_addr_t event_addr, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t avrcp_cid){ 919 if (connection == NULL){ 920 connection = avrcp_create_connection(role, event_addr); 921 } 922 if (connection) { 923 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 924 connection->l2cap_signaling_cid = local_cid; 925 connection->avrcp_cid = avrcp_cid; 926 connection->con_handle = con_handle; 927 btstack_run_loop_remove_timer(&connection->retry_timer); 928 } 929 return connection; 930 } 931 932 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 933 connection->l2cap_signaling_cid = local_cid; 934 connection->l2cap_mtu = l2cap_mtu; 935 connection->con_handle = con_handle; 936 connection->incoming_declined = false; 937 connection->target_song_length_ms = 0xFFFFFFFF; 938 connection->target_song_position_ms = 0xFFFFFFFF; 939 memset(connection->target_track_id, 0xFF, 8); 940 connection->target_track_selected = false; 941 connection->target_track_changed = false; 942 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 943 connection->state = AVCTP_CONNECTION_OPENED; 944 945 log_info("L2CAP_EVENT_CHANNEL_OPENED avrcp_cid 0x%02x, l2cap_signaling_cid 0x%02x, role %d, state %d", connection->avrcp_cid, connection->l2cap_signaling_cid, connection->role, connection->state); 946 } 947 948 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 949 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 950 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 951 if (connection_controller == NULL) return; 952 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 953 if (connection_target == NULL) return; 954 955 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 956 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 957 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 958 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 959 } 960 } 961 962 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 963 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 964 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 965 966 // add some jitter/randomness to reconnect delay 967 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 968 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 969 970 btstack_run_loop_add_timer(&connection->retry_timer); 971 } 972 973 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 974 return (avrcp_frame_type_t)((header & 0x02) >> 1); 975 } 976 977 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 978 UNUSED(channel); 979 UNUSED(size); 980 bd_addr_t event_addr; 981 uint16_t local_cid; 982 uint16_t l2cap_mtu; 983 uint8_t status; 984 bool decline_connection; 985 bool outoing_active; 986 bool connection_already_established; 987 hci_con_handle_t con_handle; 988 989 avrcp_connection_t * connection_controller; 990 avrcp_connection_t * connection_target; 991 bool can_send; 992 993 switch (packet_type) { 994 case HCI_EVENT_PACKET: 995 switch (hci_event_packet_get_type(packet)) { 996 997 case L2CAP_EVENT_INCOMING_CONNECTION: 998 btstack_assert(avrcp_controller_packet_handler != NULL); 999 btstack_assert(avrcp_target_packet_handler != NULL); 1000 1001 l2cap_event_incoming_connection_get_address(packet, event_addr); 1002 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 1003 con_handle = l2cap_event_incoming_connection_get_handle(packet); 1004 1005 outoing_active = false; 1006 connection_already_established = false; 1007 1008 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 1009 if (connection_target != NULL){ 1010 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 1011 outoing_active = true; 1012 connection_target->incoming_declined = true; 1013 } 1014 if (connection_target->state >= AVCTP_CONNECTION_OPENED){ 1015 connection_already_established = true; 1016 } 1017 } 1018 1019 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1020 if (connection_controller != NULL){ 1021 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 1022 outoing_active = true; 1023 connection_controller->incoming_declined = true; 1024 } 1025 if (connection_controller->state >= AVCTP_CONNECTION_OPENED){ 1026 connection_already_established = true; 1027 } 1028 } 1029 1030 decline_connection = outoing_active || connection_already_established; 1031 if (decline_connection == false){ 1032 uint16_t avrcp_cid; 1033 if ((connection_controller == NULL) || (connection_target == NULL)){ 1034 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1035 } else { 1036 avrcp_cid = connection_controller->avrcp_cid; 1037 } 1038 // create two connection objects (both) 1039 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 1040 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 1041 if ((connection_target == NULL) || (connection_controller == NULL)){ 1042 decline_connection = true; 1043 if (connection_target) { 1044 avrcp_finalize_connection(connection_target); 1045 } 1046 if (connection_controller) { 1047 avrcp_finalize_connection(connection_controller); 1048 } 1049 } 1050 } 1051 if (decline_connection){ 1052 log_info("Decline connection 0x%04x: outgoing active %u, connection already established: %u", local_cid, outoing_active, connection_already_established); 1053 l2cap_decline_connection(local_cid); 1054 } else { 1055 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%04x, state %d", local_cid, connection_controller->state); 1056 l2cap_accept_connection(local_cid); 1057 } 1058 break; 1059 1060 case L2CAP_EVENT_CHANNEL_OPENED: 1061 l2cap_event_channel_opened_get_address(packet, event_addr); 1062 status = l2cap_event_channel_opened_get_status(packet); 1063 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 1064 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 1065 con_handle = l2cap_event_channel_opened_get_handle(packet); 1066 1067 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1068 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 1069 1070 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 1071 // outgoing: structs are cteated in avrcp_connect() 1072 if ((connection_controller == NULL) || (connection_target == NULL)) { 1073 break; 1074 } 1075 1076 switch (status){ 1077 case ERROR_CODE_SUCCESS: 1078 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 1079 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 1080 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1081 return; 1082 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 1083 if (connection_controller->incoming_declined == true){ 1084 log_info("Incoming connection was declined, and the outgoing failed"); 1085 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1086 connection_controller->incoming_declined = false; 1087 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1088 connection_target->incoming_declined = false; 1089 avrcp_retry_timer_start(connection_controller); 1090 return; 1091 } 1092 break; 1093 default: 1094 break; 1095 } 1096 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 1097 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1098 avrcp_finalize_connection(connection_controller); 1099 avrcp_finalize_connection(connection_target); 1100 1101 break; 1102 1103 case L2CAP_EVENT_CHANNEL_CLOSED: 1104 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1105 1106 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1107 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1108 if ((connection_controller == NULL) || (connection_target == NULL)) { 1109 break; 1110 } 1111 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 1112 avrcp_finalize_connection(connection_controller); 1113 avrcp_finalize_connection(connection_target); 1114 break; 1115 1116 case L2CAP_EVENT_CAN_SEND_NOW: 1117 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 1118 can_send = true; 1119 1120 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1121 if ((connection_target != NULL) && connection_target->wait_to_send){ 1122 connection_target->wait_to_send = false; 1123 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1124 can_send = false; 1125 } 1126 1127 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1128 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 1129 if (can_send){ 1130 connection_controller->wait_to_send = false; 1131 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1132 } else { 1133 l2cap_request_can_send_now_event(local_cid); 1134 } 1135 } 1136 break; 1137 1138 default: 1139 break; 1140 } 1141 break; 1142 1143 case L2CAP_DATA_PACKET: 1144 switch (avrcp_get_frame_type(packet[0])){ 1145 case AVRCP_RESPONSE_FRAME: 1146 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1147 break; 1148 case AVRCP_COMMAND_FRAME: 1149 default: // make compiler happy 1150 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1151 break; 1152 } 1153 break; 1154 1155 default: 1156 break; 1157 } 1158 } 1159 1160 void avrcp_init(void){ 1161 avrcp_connections = NULL; 1162 if (avrcp_l2cap_service_registered) return; 1163 1164 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1165 if (status != ERROR_CODE_SUCCESS) return; 1166 avrcp_l2cap_service_registered = true; 1167 } 1168 1169 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1170 // note: called by avrcp_controller_init 1171 avrcp_controller_packet_handler = callback; 1172 } 1173 1174 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1175 // note: called by avrcp_target_init 1176 avrcp_target_packet_handler = callback; 1177 } 1178 1179 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1180 btstack_assert(callback != NULL); 1181 avrcp_callback = callback; 1182 } 1183 1184 void avrcp_register_browsing_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1185 btstack_assert(callback != NULL); 1186 avrcp_browsing_sdp_query_complete_handler = callback; 1187 } 1188 1189 #ifdef ENABLE_AVRCP_COVER_ART 1190 void avrcp_register_cover_art_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1191 btstack_assert(callback != NULL); 1192 avrcp_cover_art_sdp_query_complete_handler = callback; 1193 } 1194 #endif 1195 1196 void avrcp_trigger_sdp_query(avrcp_connection_t *connection_controller, avrcp_connection_t *connection_target) { 1197 connection_controller->trigger_sdp_query = true; 1198 connection_target->trigger_sdp_query = true; 1199 1200 avrcp_start_next_sdp_query(); 1201 } 1202 1203 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1204 btstack_assert(avrcp_controller_packet_handler != NULL); 1205 btstack_assert(avrcp_target_packet_handler != NULL); 1206 1207 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1208 bool setup_active = false; 1209 if (connection_controller){ 1210 // allow to call avrcp_connect after signaling connection was triggered remotely 1211 // @note this also allows to call avrcp_connect again before SLC is complete 1212 if (connection_controller->state < AVCTP_CONNECTION_OPENED){ 1213 setup_active = true; 1214 } else { 1215 return ERROR_CODE_COMMAND_DISALLOWED; 1216 } 1217 } 1218 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1219 if (connection_target){ 1220 if (connection_target->state < AVCTP_CONNECTION_OPENED){ 1221 setup_active = true; 1222 } else { 1223 return ERROR_CODE_COMMAND_DISALLOWED; 1224 } 1225 } 1226 if (setup_active){ 1227 return ERROR_CODE_SUCCESS; 1228 } 1229 1230 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1231 1232 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1233 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1234 1235 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1236 if (!connection_target){ 1237 avrcp_finalize_connection(connection_controller); 1238 return BTSTACK_MEMORY_ALLOC_FAILED; 1239 } 1240 1241 if (avrcp_cid != NULL){ 1242 *avrcp_cid = cid; 1243 } 1244 1245 connection_controller->avrcp_cid = cid; 1246 connection_target->avrcp_cid = cid; 1247 1248 connection_controller->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1249 connection_target->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1250 1251 avrcp_trigger_sdp_query(connection_controller, connection_target); 1252 1253 return ERROR_CODE_SUCCESS; 1254 } 1255 1256 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1257 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1258 if (!connection_controller){ 1259 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1260 } 1261 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1262 if (!connection_target){ 1263 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1264 } 1265 if (connection_controller->browsing_connection){ 1266 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1267 } 1268 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1269 return ERROR_CODE_SUCCESS; 1270 } 1271 1272 void avrcp_deinit(void){ 1273 avrcp_l2cap_service_registered = false; 1274 1275 avrcp_cid_counter = 0; 1276 avrcp_connections = NULL; 1277 1278 avrcp_callback = NULL; 1279 avrcp_controller_packet_handler = NULL; 1280 avrcp_target_packet_handler = NULL; 1281 1282 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1283 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1284 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1285 } 1286 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1287 #define FUZZ_CID 0x44 1288 #define FUZZ_CON_HANDLE 0x0001 1289 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1290 void avrcp_init_fuzz(void){ 1291 // setup avrcp connections for cid 1292 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1293 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1294 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1295 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1296 } 1297 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1298 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1299 } 1300 #endif 1301