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/sdp_client.h" 51 #include "classic/sdp_util.h" 52 #include "classic/avrcp.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 } avrcp_sdp_query_context_t; 65 66 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 static const char * avrcp_default_controller_service_name = "BTstack AVRCP Controller Service"; 69 static const char * avrcp_default_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 70 static const char * avrcp_defaul_target_service_name = "BTstack AVRCP Target Service"; 71 static const char * avrcp_default_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 72 73 static const char * avrcp_subunit_type_name[] = { 74 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 75 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 76 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 77 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 78 }; 79 80 // default subunit info: single PANEL subunit 81 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 82 83 // globals 84 static bool avrcp_l2cap_service_registered = false; 85 86 // connections 87 static uint16_t avrcp_cid_counter; 88 static btstack_linked_list_t avrcp_connections; 89 90 // higher layer callbacks 91 static btstack_packet_handler_t avrcp_callback; 92 static btstack_packet_handler_t avrcp_controller_packet_handler; 93 static btstack_packet_handler_t avrcp_target_packet_handler; 94 95 // sdp query 96 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 97 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 98 static uint8_t avrcp_sdp_query_attribute_value[45]; 99 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 100 101 102 const char * avrcp_subunit2str(uint16_t index){ 103 if (index <= 11) return avrcp_subunit_type_name[index]; 104 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 105 return avrcp_subunit_type_name[16]; 106 } 107 108 static const char * avrcp_event_name[] = { 109 "ERROR", "PLAYBACK_STATUS_CHANGED", 110 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 111 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 112 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 113 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 114 }; 115 const char * avrcp_event2str(uint16_t index){ 116 if (index <= 0x0d) return avrcp_event_name[index]; 117 return avrcp_event_name[0]; 118 } 119 120 static const char * avrcp_operation_name[] = { 121 "SKIP", NULL, NULL, NULL, NULL, 122 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 123 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 124 }; 125 126 const char * avrcp_operation2str(uint8_t operation_id){ 127 char * name = NULL; 128 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 129 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 130 } 131 if (name == NULL){ 132 static char buffer[13]; 133 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 134 buffer[sizeof(buffer)-1] = 0; 135 return buffer; 136 } else { 137 return name; 138 } 139 } 140 141 static const char * avrcp_media_attribute_id_name[] = { 142 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 143 }; 144 const char * avrcp_attribute2str(uint8_t index){ 145 if (index > 7){ 146 index = 0; 147 } 148 return avrcp_media_attribute_id_name[0]; 149 } 150 151 static const char * avrcp_play_status_name[] = { 152 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 153 "ERROR" // 0xFF 154 }; 155 const char * avrcp_play_status2str(uint8_t index){ 156 if (index > 4){ 157 index = 5; 158 } 159 return avrcp_play_status_name[index]; 160 } 161 162 static const char * avrcp_ctype_name[] = { 163 "CONTROL", 164 "STATUS", 165 "SPECIFIC_INQUIRY", 166 "NOTIFY", 167 "GENERAL_INQUIRY", 168 "RESERVED5", 169 "RESERVED6", 170 "RESERVED7", 171 "NOT IMPLEMENTED IN REMOTE", 172 "ACCEPTED BY REMOTE", 173 "REJECTED BY REMOTE", 174 "IN_TRANSITION", 175 "IMPLEMENTED_STABLE", 176 "CHANGED_STABLE", 177 "RESERVED", 178 "INTERIM" 179 }; 180 static const uint16_t avrcp_ctype_name_num = 16; 181 182 const char * avrcp_ctype2str(uint8_t index){ 183 if (index < avrcp_ctype_name_num){ 184 return avrcp_ctype_name[index]; 185 } 186 return "NONE"; 187 } 188 189 static const char * avrcp_shuffle_mode_name[] = { 190 "SHUFFLE OFF", 191 "SHUFFLE ALL TRACKS", 192 "SHUFFLE GROUP" 193 }; 194 195 const char * avrcp_shuffle2str(uint8_t index){ 196 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 197 return "NONE"; 198 } 199 200 static const char * avrcp_repeat_mode_name[] = { 201 "REPEAT OFF", 202 "REPEAT SINGLE TRACK", 203 "REPEAT ALL TRACKS", 204 "REPEAT GROUP" 205 }; 206 207 const char * avrcp_repeat2str(uint8_t index){ 208 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 209 return "NONE"; 210 } 211 212 static const char * notification_name[] = { 213 "INVALID_INDEX", 214 "PLAYBACK_STATUS_CHANGED", 215 "TRACK_CHANGED", 216 "TRACK_REACHED_END", 217 "TRACK_REACHED_START", 218 "PLAYBACK_POS_CHANGED", 219 "BATT_STATUS_CHANGED", 220 "SYSTEM_STATUS_CHANGED", 221 "PLAYER_APPLICATION_SETTING_CHANGED", 222 "NOW_PLAYING_CONTENT_CHANGED", 223 "AVAILABLE_PLAYERS_CHANGED", 224 "ADDRESSED_PLAYER_CHANGED", 225 "UIDS_CHANGED", 226 "VOLUME_CHANGED", 227 "MAX_VALUE" 228 }; 229 230 const char * avrcp_notification2str(avrcp_notification_event_id_t index){ 231 if ((index >= AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) && (index <= AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 232 return notification_name[index]; 233 } 234 return notification_name[0]; 235 } 236 237 btstack_linked_list_t avrcp_get_connections(void){ 238 return avrcp_connections; 239 } 240 241 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 242 uint8_t cmd_opcode_index = 5; 243 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 244 return packet[cmd_opcode_index]; 245 } 246 247 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 248 const char * service_name, const char * service_provider_name){ 249 uint8_t* attribute; 250 de_create_sequence(service); 251 252 // 0x0000 "Service Record Handle" 253 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 254 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 255 256 // 0x0001 "Service Class ID List" 257 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 258 attribute = de_push_sequence(service); 259 { 260 if (controller){ 261 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 262 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 263 } else { 264 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 265 } 266 } 267 de_pop_sequence(service, attribute); 268 269 // 0x0004 "Protocol Descriptor List" 270 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 271 attribute = de_push_sequence(service); 272 { 273 uint8_t* l2cpProtocol = de_push_sequence(attribute); 274 { 275 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 276 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 277 } 278 de_pop_sequence(attribute, l2cpProtocol); 279 280 uint8_t* avctpProtocol = de_push_sequence(attribute); 281 { 282 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 283 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 284 } 285 de_pop_sequence(attribute, avctpProtocol); 286 } 287 de_pop_sequence(service, attribute); 288 289 // 0x0005 "Public Browse Group" 290 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 291 attribute = de_push_sequence(service); 292 { 293 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 294 } 295 de_pop_sequence(service, attribute); 296 297 // 0x0009 "Bluetooth Profile Descriptor List" 298 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 299 attribute = de_push_sequence(service); 300 { 301 uint8_t *avrcProfile = de_push_sequence(attribute); 302 { 303 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 304 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 305 } 306 de_pop_sequence(attribute, avrcProfile); 307 } 308 de_pop_sequence(service, attribute); 309 310 // 0x000d "Additional Bluetooth Profile Descriptor List" 311 if (browsing){ 312 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 313 attribute = de_push_sequence(service); 314 { 315 uint8_t * des = de_push_sequence(attribute); 316 { 317 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 318 { 319 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 320 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 321 } 322 de_pop_sequence(des, browsing_l2cpProtocol); 323 324 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 325 { 326 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 327 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 328 } 329 de_pop_sequence(des, browsing_avctpProtocol); 330 } 331 de_pop_sequence(attribute, des); 332 } 333 de_pop_sequence(service, attribute); 334 } 335 336 337 // 0x0100 "Service Name" 338 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 339 if (service_name){ 340 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 341 } else { 342 if (controller){ 343 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 344 } else { 345 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 346 } 347 } 348 349 // 0x0100 "Provider Name" 350 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 351 if (service_provider_name){ 352 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 353 } else { 354 if (controller){ 355 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 356 } else { 357 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 358 } 359 } 360 361 // 0x0311 "Supported Features" 362 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 363 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 364 } 365 366 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 367 switch (avctp_packet_type){ 368 case AVCTP_SINGLE_PACKET: 369 // AVCTP message: transport header (1), pid (2) 370 return 3; 371 case AVCTP_START_PACKET: 372 // AVCTP message: transport header (1), num_packets (1), pid (2) 373 return 4; 374 default: 375 // AVCTP message: transport header (1) 376 return 1; 377 } 378 } 379 380 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 381 switch (avctp_packet_type){ 382 case AVCTP_SINGLE_PACKET: 383 case AVCTP_START_PACKET: 384 break; 385 default: 386 return 0; 387 } 388 389 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 390 switch (command_opcode){ 391 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 392 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 393 break; 394 case AVRCP_CMD_OPCODE_PASS_THROUGH: 395 offset += 3; // AVRCP message: operation id (1), param_len (2) 396 break; 397 default: 398 break; 399 } 400 return offset; 401 } 402 403 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){ 404 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 405 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 406 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 407 408 btstack_assert(max_frame_size >= payload_offset); 409 return (max_frame_size - payload_offset); 410 } 411 412 413 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 414 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 415 return AVCTP_SINGLE_PACKET; 416 } 417 418 if (connection->data_offset == 0){ 419 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 420 connection->command_opcode, 421 AVCTP_SINGLE_PACKET); 422 if (max_payload_size_for_single_packet >= connection->data_len){ 423 *max_payload_size = max_payload_size_for_single_packet; 424 return AVCTP_SINGLE_PACKET; 425 } else { 426 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 427 *max_payload_size = max_payload_size_for_start_packet; 428 return AVCTP_START_PACKET; 429 } 430 } else { 431 // both packet types have the same single byte AVCTP header 432 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 433 connection->command_opcode, 434 AVCTP_CONTINUE_PACKET); 435 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 436 return AVCTP_CONTINUE_PACKET; 437 } else { 438 return AVCTP_END_PACKET; 439 } 440 } 441 } 442 443 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 444 switch (connection->avctp_packet_type) { 445 case AVCTP_SINGLE_PACKET: 446 case AVCTP_START_PACKET: 447 break; 448 default: 449 return connection->avrcp_packet_type; 450 } 451 452 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 453 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 454 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 455 456 if (connection->data_offset == 0){ 457 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 458 return AVRCP_SINGLE_PACKET; 459 } else { 460 return AVRCP_START_PACKET; 461 } 462 } else { 463 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 464 return AVRCP_CONTINUE_PACKET; 465 } else { 466 return AVRCP_END_PACKET; 467 } 468 } 469 } 470 471 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 472 btstack_linked_list_iterator_t it; 473 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 474 while (btstack_linked_list_iterator_has_next(&it)){ 475 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 476 if (connection->role != role) continue; 477 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 478 return connection; 479 } 480 return NULL; 481 } 482 483 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 484 btstack_linked_list_iterator_t it; 485 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 486 while (btstack_linked_list_iterator_has_next(&it)){ 487 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 488 if (connection->role != role) continue; 489 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 490 return connection; 491 } 492 return NULL; 493 } 494 495 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 496 btstack_linked_list_iterator_t it; 497 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 498 while (btstack_linked_list_iterator_has_next(&it)){ 499 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 500 if (connection->role != role) continue; 501 if (connection->avrcp_cid != avrcp_cid) continue; 502 return connection; 503 } 504 return NULL; 505 } 506 507 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 508 btstack_linked_list_iterator_t it; 509 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 510 while (btstack_linked_list_iterator_has_next(&it)){ 511 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 512 if (connection->role != role) continue; 513 if (connection->avrcp_browsing_cid != browsing_cid) continue; 514 return connection; 515 } 516 return NULL; 517 } 518 519 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 520 btstack_linked_list_iterator_t it; 521 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 522 while (btstack_linked_list_iterator_has_next(&it)){ 523 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 524 if (connection->role != role) continue; 525 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 526 return connection; 527 } 528 return NULL; 529 } 530 531 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 532 btstack_linked_list_iterator_t it; 533 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 534 while (btstack_linked_list_iterator_has_next(&it)){ 535 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 536 if (connection->role != role) continue; 537 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 538 return connection->browsing_connection; 539 } 540 return NULL; 541 } 542 543 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 544 connection->wait_to_send = true; 545 l2cap_request_can_send_now_event(l2cap_cid); 546 } 547 548 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 549 do { 550 if (avrcp_cid_counter == 0xffff) { 551 avrcp_cid_counter = 1; 552 } else { 553 avrcp_cid_counter++; 554 } 555 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 556 return avrcp_cid_counter; 557 } 558 559 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 560 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 561 if (!connection){ 562 log_error("Not enough memory to create connection for role %d", role); 563 return NULL; 564 } 565 566 connection->state = AVCTP_CONNECTION_IDLE; 567 connection->role = role; 568 569 connection->transaction_id = 0xFF; 570 connection->transaction_id_counter = 0; 571 572 connection->controller_max_num_fragments = 0xFF; 573 574 // setup default unit / subunit info 575 connection->company_id = 0xffffff; 576 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 577 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 578 connection->target_subunit_info_data = avrcp_default_subunit_info; 579 580 log_info("avrcp_create_connection, role %d", role); 581 (void)memcpy(connection->remote_addr, remote_addr, 6); 582 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 583 return connection; 584 } 585 586 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 587 btstack_run_loop_remove_timer(&connection->retry_timer); 588 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 589 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 590 btstack_memory_avrcp_connection_free(connection); 591 } 592 593 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 594 btstack_assert(avrcp_callback != NULL); 595 596 uint8_t event[14]; 597 int pos = 0; 598 event[pos++] = HCI_EVENT_AVRCP_META; 599 event[pos++] = sizeof(event) - 2; 600 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 601 event[pos++] = status; 602 little_endian_store_16(event, pos, avrcp_cid); 603 pos += 2; 604 reverse_bd_addr(addr,&event[pos]); 605 pos += 6; 606 little_endian_store_16(event, pos, con_handle); 607 pos += 2; 608 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 609 } 610 611 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 612 btstack_assert(avrcp_callback != NULL); 613 614 uint8_t event[5]; 615 int pos = 0; 616 event[pos++] = HCI_EVENT_AVRCP_META; 617 event[pos++] = sizeof(event) - 2; 618 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 619 little_endian_store_16(event, pos, avrcp_cid); 620 pos += 2; 621 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 622 } 623 624 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 625 return avrcp_sdp_query_context.browsing_l2cap_psm; 626 } 627 628 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 629 des_iterator_t des_list_it; 630 des_iterator_t prot_it; 631 632 // Handle new SDP record 633 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 634 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 635 avrcp_sdp_query_context.parse_sdp_record = 0; 636 // log_info("SDP Record: Nr: %d", record_id); 637 } 638 639 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 640 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 641 642 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 643 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 644 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 645 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 646 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)) { 647 uint8_t * element = des_iterator_get_element(&des_list_it); 648 if (de_get_element_type(element) != DE_UUID) continue; 649 uint32_t uuid = de_get_uuid32(element); 650 switch (uuid){ 651 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 652 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 653 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 654 avrcp_sdp_query_context.parse_sdp_record = 1; 655 break; 656 default: 657 break; 658 } 659 } 660 break; 661 662 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 663 if (!avrcp_sdp_query_context.parse_sdp_record) break; 664 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 665 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)) { 666 uint8_t *des_element; 667 uint8_t *element; 668 uint32_t uuid; 669 670 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 671 672 des_element = des_iterator_get_element(&des_list_it); 673 des_iterator_init(&prot_it, des_element); 674 element = des_iterator_get_element(&prot_it); 675 676 if (de_get_element_type(element) != DE_UUID) continue; 677 678 uuid = de_get_uuid32(element); 679 des_iterator_next(&prot_it); 680 switch (uuid){ 681 case BLUETOOTH_PROTOCOL_L2CAP: 682 if (!des_iterator_has_more(&prot_it)) continue; 683 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 684 break; 685 case BLUETOOTH_PROTOCOL_AVCTP: 686 if (!des_iterator_has_more(&prot_it)) continue; 687 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 688 break; 689 default: 690 break; 691 } 692 } 693 } 694 break; 695 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 696 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 697 if (!avrcp_sdp_query_context.parse_sdp_record) break; 698 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 699 700 des_iterator_t des_list_0_it; 701 uint8_t *element_0; 702 703 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 704 element_0 = des_iterator_get_element(&des_list_0_it); 705 706 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 707 uint8_t *des_element; 708 uint8_t *element; 709 uint32_t uuid; 710 711 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 712 713 des_element = des_iterator_get_element(&des_list_it); 714 des_iterator_init(&prot_it, des_element); 715 element = des_iterator_get_element(&prot_it); 716 717 if (de_get_element_type(element) != DE_UUID) continue; 718 719 uuid = de_get_uuid32(element); 720 des_iterator_next(&prot_it); 721 switch (uuid){ 722 case BLUETOOTH_PROTOCOL_L2CAP: 723 if (!des_iterator_has_more(&prot_it)) continue; 724 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 725 break; 726 case BLUETOOTH_PROTOCOL_AVCTP: 727 if (!des_iterator_has_more(&prot_it)) continue; 728 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 729 break; 730 default: 731 break; 732 } 733 } 734 } 735 break; 736 default: 737 break; 738 } 739 } 740 } else { 741 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)); 742 } 743 } 744 745 static void avrcp_handle_sdp_query_completed(avrcp_connection_t * connection, uint8_t status){ 746 btstack_assert(connection != NULL); 747 if (status == ERROR_CODE_SUCCESS){ 748 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 749 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 750 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 751 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 752 } else { 753 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 754 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 755 avrcp_finalize_connection(connection); 756 } 757 } 758 759 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 760 UNUSED(packet_type); 761 UNUSED(channel); 762 UNUSED(size); 763 764 bool state_ok = true; 765 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 766 if (!avrcp_target_connection || avrcp_target_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 767 state_ok = false; 768 } 769 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 770 if (!avrcp_controller_connection || avrcp_controller_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 771 state_ok = false; 772 } 773 if (!state_ok){ 774 // something wrong, nevertheless, start next sdp query if this one is complete 775 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 776 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 777 } 778 return; 779 } 780 781 uint8_t status; 782 783 switch (hci_event_packet_get_type(packet)){ 784 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 785 avrcp_handle_sdp_client_query_attribute_value(packet); 786 return; 787 788 case SDP_EVENT_QUERY_COMPLETE: 789 status = sdp_event_query_complete_get_status(packet); 790 791 if (status != ERROR_CODE_SUCCESS){ 792 avrcp_handle_sdp_query_completed(avrcp_controller_connection, status); 793 avrcp_handle_sdp_query_completed(avrcp_target_connection, status); 794 break; 795 } 796 797 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 798 avrcp_handle_sdp_query_completed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 799 avrcp_handle_sdp_query_completed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 800 break; 801 } 802 803 avrcp_handle_sdp_query_completed(avrcp_controller_connection, ERROR_CODE_SUCCESS); 804 avrcp_handle_sdp_query_completed(avrcp_target_connection, ERROR_CODE_SUCCESS); 805 806 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 807 break; 808 809 default: 810 return; 811 } 812 813 // register the SDP Query request to check if there is another connection waiting for the query 814 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 815 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 816 } 817 818 819 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){ 820 if (connection == NULL){ 821 connection = avrcp_create_connection(role, event_addr); 822 } 823 if (connection) { 824 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 825 connection->l2cap_signaling_cid = local_cid; 826 connection->avrcp_cid = avrcp_cid; 827 connection->con_handle = con_handle; 828 btstack_run_loop_remove_timer(&connection->retry_timer); 829 } 830 return connection; 831 } 832 833 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 834 connection->l2cap_signaling_cid = local_cid; 835 connection->l2cap_mtu = l2cap_mtu; 836 connection->con_handle = con_handle; 837 connection->incoming_declined = false; 838 connection->target_song_length_ms = 0xFFFFFFFF; 839 connection->target_song_position_ms = 0xFFFFFFFF; 840 memset(connection->target_track_id, 0xFF, 8); 841 connection->target_track_selected = false; 842 connection->target_track_changed = false; 843 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 844 connection->state = AVCTP_CONNECTION_OPENED; 845 846 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); 847 } 848 849 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 850 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 851 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 852 if (connection_controller == NULL) return; 853 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 854 if (connection_target == NULL) return; 855 856 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 857 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 858 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 859 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 860 } 861 } 862 863 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 864 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 865 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 866 867 // add some jitter/randomness to reconnect delay 868 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 869 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 870 871 btstack_run_loop_add_timer(&connection->retry_timer); 872 } 873 874 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 875 return (avrcp_frame_type_t)((header & 0x02) >> 1); 876 } 877 878 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 879 UNUSED(channel); 880 UNUSED(size); 881 bd_addr_t event_addr; 882 uint16_t local_cid; 883 uint16_t l2cap_mtu; 884 uint8_t status; 885 bool decline_connection; 886 bool outoing_active; 887 hci_con_handle_t con_handle; 888 889 avrcp_connection_t * connection_controller; 890 avrcp_connection_t * connection_target; 891 bool can_send; 892 893 switch (packet_type) { 894 case HCI_EVENT_PACKET: 895 switch (hci_event_packet_get_type(packet)) { 896 897 case L2CAP_EVENT_INCOMING_CONNECTION: 898 btstack_assert(avrcp_controller_packet_handler != NULL); 899 btstack_assert(avrcp_target_packet_handler != NULL); 900 901 l2cap_event_incoming_connection_get_address(packet, event_addr); 902 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 903 con_handle = l2cap_event_incoming_connection_get_handle(packet); 904 905 outoing_active = false; 906 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 907 if (connection_target != NULL){ 908 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 909 outoing_active = true; 910 connection_target->incoming_declined = true; 911 } 912 } 913 914 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 915 if (connection_controller != NULL){ 916 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 917 outoing_active = true; 918 connection_controller->incoming_declined = true; 919 } 920 } 921 922 decline_connection = outoing_active; 923 if (decline_connection == false){ 924 uint16_t avrcp_cid; 925 if ((connection_controller == NULL) || (connection_target == NULL)){ 926 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 927 } else { 928 avrcp_cid = connection_controller->avrcp_cid; 929 } 930 // create two connection objects (both) 931 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 932 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 933 if ((connection_target == NULL) || (connection_controller == NULL)){ 934 decline_connection = true; 935 if (connection_target) { 936 avrcp_finalize_connection(connection_target); 937 } 938 if (connection_controller) { 939 avrcp_finalize_connection(connection_controller); 940 } 941 } 942 } 943 if (decline_connection){ 944 l2cap_decline_connection(local_cid); 945 } else { 946 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 947 l2cap_accept_connection(local_cid); 948 } 949 break; 950 951 case L2CAP_EVENT_CHANNEL_OPENED: 952 l2cap_event_channel_opened_get_address(packet, event_addr); 953 status = l2cap_event_channel_opened_get_status(packet); 954 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 955 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 956 con_handle = l2cap_event_channel_opened_get_handle(packet); 957 958 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 959 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 960 961 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 962 // outgoing: structs are cteated in avrcp_connect() 963 if ((connection_controller == NULL) || (connection_target == NULL)) { 964 break; 965 } 966 967 switch (status){ 968 case ERROR_CODE_SUCCESS: 969 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 970 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 971 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 972 return; 973 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 974 if (connection_controller->incoming_declined == true){ 975 log_info("Incoming connection was declined, and the outgoing failed"); 976 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 977 connection_controller->incoming_declined = false; 978 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 979 connection_target->incoming_declined = false; 980 avrcp_retry_timer_start(connection_controller); 981 return; 982 } 983 break; 984 default: 985 break; 986 } 987 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 988 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 989 avrcp_finalize_connection(connection_controller); 990 avrcp_finalize_connection(connection_target); 991 992 break; 993 994 case L2CAP_EVENT_CHANNEL_CLOSED: 995 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 996 997 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 998 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 999 if ((connection_controller == NULL) || (connection_target == NULL)) { 1000 break; 1001 } 1002 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 1003 avrcp_finalize_connection(connection_controller); 1004 avrcp_finalize_connection(connection_target); 1005 break; 1006 1007 case L2CAP_EVENT_CAN_SEND_NOW: 1008 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 1009 can_send = true; 1010 1011 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1012 if ((connection_target != NULL) && connection_target->wait_to_send){ 1013 connection_target->wait_to_send = false; 1014 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1015 can_send = false; 1016 } 1017 1018 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1019 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 1020 if (can_send){ 1021 connection_controller->wait_to_send = false; 1022 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1023 } else { 1024 l2cap_request_can_send_now_event(local_cid); 1025 } 1026 } 1027 break; 1028 1029 default: 1030 break; 1031 } 1032 break; 1033 1034 case L2CAP_DATA_PACKET: 1035 switch (avrcp_get_frame_type(packet[0])){ 1036 case AVRCP_RESPONSE_FRAME: 1037 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1038 break; 1039 case AVRCP_COMMAND_FRAME: 1040 default: // make compiler happy 1041 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1042 break; 1043 } 1044 break; 1045 1046 default: 1047 break; 1048 } 1049 } 1050 1051 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1052 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1053 if (!connection_controller){ 1054 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1055 } 1056 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1057 if (!connection_target){ 1058 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1059 } 1060 if (connection_controller->browsing_connection){ 1061 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1062 } 1063 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1064 return ERROR_CODE_SUCCESS; 1065 } 1066 1067 static void avrcp_handle_start_sdp_client_query(void * context){ 1068 UNUSED(context); 1069 1070 btstack_linked_list_iterator_t it; 1071 btstack_linked_list_iterator_init(&it, &avrcp_connections); 1072 while (btstack_linked_list_iterator_has_next(&it)){ 1073 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 1074 1075 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 1076 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1077 1078 // prevent triggering SDP query twice (for each role once) 1079 avrcp_connection_t * connection_with_opposite_role; 1080 switch (connection->role){ 1081 case AVRCP_CONTROLLER: 1082 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 1083 break; 1084 case AVRCP_TARGET: 1085 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 1086 break; 1087 default: 1088 btstack_assert(false); 1089 return; 1090 } 1091 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1092 1093 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 1094 avrcp_sdp_query_context.avrcp_version = 0; 1095 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 1096 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 1097 return; 1098 } 1099 } 1100 1101 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1102 btstack_assert(avrcp_controller_packet_handler != NULL); 1103 btstack_assert(avrcp_target_packet_handler != NULL); 1104 1105 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1106 if (connection_controller){ 1107 return ERROR_CODE_COMMAND_DISALLOWED; 1108 } 1109 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1110 if (connection_target){ 1111 return ERROR_CODE_COMMAND_DISALLOWED; 1112 } 1113 1114 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1115 1116 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1117 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1118 1119 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1120 if (!connection_target){ 1121 avrcp_finalize_connection(connection_controller); 1122 return BTSTACK_MEMORY_ALLOC_FAILED; 1123 } 1124 1125 if (avrcp_cid != NULL){ 1126 *avrcp_cid = cid; 1127 } 1128 1129 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1130 connection_controller->avrcp_cid = cid; 1131 1132 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1133 connection_target->avrcp_cid = cid; 1134 1135 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1136 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1137 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1138 return ERROR_CODE_SUCCESS; 1139 } 1140 1141 void avrcp_init(void){ 1142 avrcp_connections = NULL; 1143 if (avrcp_l2cap_service_registered) return; 1144 1145 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1146 if (status != ERROR_CODE_SUCCESS) return; 1147 avrcp_l2cap_service_registered = true; 1148 } 1149 1150 void avrcp_deinit(void){ 1151 avrcp_l2cap_service_registered = false; 1152 1153 avrcp_cid_counter = 0; 1154 avrcp_connections = NULL; 1155 1156 avrcp_callback = NULL; 1157 avrcp_controller_packet_handler = NULL; 1158 avrcp_target_packet_handler = NULL; 1159 1160 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1161 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1162 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1163 } 1164 1165 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1166 avrcp_controller_packet_handler = callback; 1167 } 1168 1169 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1170 avrcp_target_packet_handler = callback; 1171 } 1172 1173 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1174 btstack_assert(callback != NULL); 1175 avrcp_callback = callback; 1176 } 1177 1178 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1179 #define FUZZ_CID 0x44 1180 #define FUZZ_CON_HANDLE 0x0001 1181 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1182 void avrcp_init_fuzz(void){ 1183 // setup avrcp connections for cid 1184 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1185 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1186 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1187 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1188 } 1189 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1190 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1191 } 1192 #endif 1193