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