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