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 static void (*avrcp_browsing_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 102 103 104 const char * avrcp_subunit2str(uint16_t index){ 105 if (index <= 11) return avrcp_subunit_type_name[index]; 106 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 107 return avrcp_subunit_type_name[16]; 108 } 109 110 static const char * avrcp_event_name[] = { 111 "ERROR", "PLAYBACK_STATUS_CHANGED", 112 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 113 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 114 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 115 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 116 }; 117 const char * avrcp_event2str(uint16_t index){ 118 if (index <= 0x0d) return avrcp_event_name[index]; 119 return avrcp_event_name[0]; 120 } 121 122 static const char * avrcp_operation_name[] = { 123 "SKIP", NULL, NULL, NULL, NULL, 124 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 125 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 126 }; 127 128 const char * avrcp_operation2str(uint8_t operation_id){ 129 char * name = NULL; 130 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 131 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 132 } 133 if (name == NULL){ 134 static char buffer[13]; 135 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 136 buffer[sizeof(buffer)-1] = 0; 137 return buffer; 138 } else { 139 return name; 140 } 141 } 142 143 static const char * avrcp_media_attribute_id_name[] = { 144 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 145 }; 146 const char * avrcp_attribute2str(uint8_t index){ 147 if (index > 7){ 148 index = 0; 149 } 150 return avrcp_media_attribute_id_name[0]; 151 } 152 153 static const char * avrcp_play_status_name[] = { 154 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 155 "ERROR" // 0xFF 156 }; 157 const char * avrcp_play_status2str(uint8_t index){ 158 if (index > 4){ 159 index = 5; 160 } 161 return avrcp_play_status_name[index]; 162 } 163 164 static const char * avrcp_ctype_name[] = { 165 "CONTROL", 166 "STATUS", 167 "SPECIFIC_INQUIRY", 168 "NOTIFY", 169 "GENERAL_INQUIRY", 170 "RESERVED5", 171 "RESERVED6", 172 "RESERVED7", 173 "NOT IMPLEMENTED IN REMOTE", 174 "ACCEPTED BY REMOTE", 175 "REJECTED BY REMOTE", 176 "IN_TRANSITION", 177 "IMPLEMENTED_STABLE", 178 "CHANGED_STABLE", 179 "RESERVED", 180 "INTERIM" 181 }; 182 static const uint16_t avrcp_ctype_name_num = 16; 183 184 const char * avrcp_ctype2str(uint8_t index){ 185 if (index < avrcp_ctype_name_num){ 186 return avrcp_ctype_name[index]; 187 } 188 return "NONE"; 189 } 190 191 static const char * avrcp_shuffle_mode_name[] = { 192 "SHUFFLE OFF", 193 "SHUFFLE ALL TRACKS", 194 "SHUFFLE GROUP" 195 }; 196 197 const char * avrcp_shuffle2str(uint8_t index){ 198 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 199 return "NONE"; 200 } 201 202 static const char * avrcp_repeat_mode_name[] = { 203 "REPEAT OFF", 204 "REPEAT SINGLE TRACK", 205 "REPEAT ALL TRACKS", 206 "REPEAT GROUP" 207 }; 208 209 const char * avrcp_repeat2str(uint8_t index){ 210 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 211 return "NONE"; 212 } 213 214 static const char * notification_name[] = { 215 "INVALID_INDEX", 216 "PLAYBACK_STATUS_CHANGED", 217 "TRACK_CHANGED", 218 "TRACK_REACHED_END", 219 "TRACK_REACHED_START", 220 "PLAYBACK_POS_CHANGED", 221 "BATT_STATUS_CHANGED", 222 "SYSTEM_STATUS_CHANGED", 223 "PLAYER_APPLICATION_SETTING_CHANGED", 224 "NOW_PLAYING_CONTENT_CHANGED", 225 "AVAILABLE_PLAYERS_CHANGED", 226 "ADDRESSED_PLAYER_CHANGED", 227 "UIDS_CHANGED", 228 "VOLUME_CHANGED", 229 "MAX_VALUE" 230 }; 231 232 const char * avrcp_notification2str(avrcp_notification_event_id_t index){ 233 if ((index >= AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) && (index <= AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 234 return notification_name[index]; 235 } 236 return notification_name[0]; 237 } 238 239 btstack_linked_list_t avrcp_get_connections(void){ 240 return avrcp_connections; 241 } 242 243 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 244 uint8_t cmd_opcode_index = 5; 245 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 246 return packet[cmd_opcode_index]; 247 } 248 249 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 250 const char * service_name, const char * service_provider_name){ 251 uint8_t* attribute; 252 de_create_sequence(service); 253 254 // 0x0000 "Service Record Handle" 255 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 256 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 257 258 // 0x0001 "Service Class ID List" 259 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 260 attribute = de_push_sequence(service); 261 { 262 if (controller){ 263 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 264 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 265 } else { 266 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 267 } 268 } 269 de_pop_sequence(service, attribute); 270 271 // 0x0004 "Protocol Descriptor List" 272 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 273 attribute = de_push_sequence(service); 274 { 275 uint8_t* l2cpProtocol = de_push_sequence(attribute); 276 { 277 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 278 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 279 } 280 de_pop_sequence(attribute, l2cpProtocol); 281 282 uint8_t* avctpProtocol = de_push_sequence(attribute); 283 { 284 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 285 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 286 } 287 de_pop_sequence(attribute, avctpProtocol); 288 } 289 de_pop_sequence(service, attribute); 290 291 // 0x0005 "Public Browse Group" 292 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 293 attribute = de_push_sequence(service); 294 { 295 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 296 } 297 de_pop_sequence(service, attribute); 298 299 // 0x0009 "Bluetooth Profile Descriptor List" 300 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 301 attribute = de_push_sequence(service); 302 { 303 uint8_t *avrcProfile = de_push_sequence(attribute); 304 { 305 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 306 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 307 } 308 de_pop_sequence(attribute, avrcProfile); 309 } 310 de_pop_sequence(service, attribute); 311 312 // 0x000d "Additional Bluetooth Profile Descriptor List" 313 if (browsing){ 314 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 315 attribute = de_push_sequence(service); 316 { 317 uint8_t * des = de_push_sequence(attribute); 318 { 319 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 320 { 321 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 322 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 323 } 324 de_pop_sequence(des, browsing_l2cpProtocol); 325 326 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 327 { 328 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 329 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 330 } 331 de_pop_sequence(des, browsing_avctpProtocol); 332 } 333 de_pop_sequence(attribute, des); 334 } 335 de_pop_sequence(service, attribute); 336 } 337 338 339 // 0x0100 "Service Name" 340 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 341 if (service_name){ 342 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 343 } else { 344 if (controller){ 345 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 346 } else { 347 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 348 } 349 } 350 351 // 0x0100 "Provider Name" 352 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 353 if (service_provider_name){ 354 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 355 } else { 356 if (controller){ 357 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 358 } else { 359 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 360 } 361 } 362 363 // 0x0311 "Supported Features" 364 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 365 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 366 } 367 368 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 369 switch (avctp_packet_type){ 370 case AVCTP_SINGLE_PACKET: 371 // AVCTP message: transport header (1), pid (2) 372 return 3; 373 case AVCTP_START_PACKET: 374 // AVCTP message: transport header (1), num_packets (1), pid (2) 375 return 4; 376 default: 377 // AVCTP message: transport header (1) 378 return 1; 379 } 380 } 381 382 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 383 switch (avctp_packet_type){ 384 case AVCTP_SINGLE_PACKET: 385 case AVCTP_START_PACKET: 386 break; 387 default: 388 return 0; 389 } 390 391 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 392 switch (command_opcode){ 393 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 394 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 395 break; 396 case AVRCP_CMD_OPCODE_PASS_THROUGH: 397 offset += 3; // AVRCP message: operation id (1), param_len (2) 398 break; 399 default: 400 break; 401 } 402 return offset; 403 } 404 405 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){ 406 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 407 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 408 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 409 410 btstack_assert(max_frame_size >= payload_offset); 411 return (max_frame_size - payload_offset); 412 } 413 414 415 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 416 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 417 return AVCTP_SINGLE_PACKET; 418 } 419 420 if (connection->data_offset == 0){ 421 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 422 connection->command_opcode, 423 AVCTP_SINGLE_PACKET); 424 if (max_payload_size_for_single_packet >= connection->data_len){ 425 *max_payload_size = max_payload_size_for_single_packet; 426 return AVCTP_SINGLE_PACKET; 427 } else { 428 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 429 *max_payload_size = max_payload_size_for_start_packet; 430 return AVCTP_START_PACKET; 431 } 432 } else { 433 // both packet types have the same single byte AVCTP header 434 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 435 connection->command_opcode, 436 AVCTP_CONTINUE_PACKET); 437 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 438 return AVCTP_CONTINUE_PACKET; 439 } else { 440 return AVCTP_END_PACKET; 441 } 442 } 443 } 444 445 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 446 switch (connection->avctp_packet_type) { 447 case AVCTP_SINGLE_PACKET: 448 case AVCTP_START_PACKET: 449 break; 450 default: 451 return connection->avrcp_packet_type; 452 } 453 454 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 455 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 456 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 457 458 if (connection->data_offset == 0){ 459 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 460 return AVRCP_SINGLE_PACKET; 461 } else { 462 return AVRCP_START_PACKET; 463 } 464 } else { 465 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 466 return AVRCP_CONTINUE_PACKET; 467 } else { 468 return AVRCP_END_PACKET; 469 } 470 } 471 } 472 473 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 474 btstack_linked_list_iterator_t it; 475 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 476 while (btstack_linked_list_iterator_has_next(&it)){ 477 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 478 if (connection->role != role) continue; 479 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 480 return connection; 481 } 482 return NULL; 483 } 484 485 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 486 btstack_linked_list_iterator_t it; 487 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 488 while (btstack_linked_list_iterator_has_next(&it)){ 489 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 490 if (connection->role != role) continue; 491 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 492 return connection; 493 } 494 return NULL; 495 } 496 497 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 498 btstack_linked_list_iterator_t it; 499 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 500 while (btstack_linked_list_iterator_has_next(&it)){ 501 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 502 if (connection->role != role) continue; 503 if (connection->avrcp_cid != avrcp_cid) continue; 504 return connection; 505 } 506 return NULL; 507 } 508 509 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 510 btstack_linked_list_iterator_t it; 511 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 512 while (btstack_linked_list_iterator_has_next(&it)){ 513 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 514 if (connection->role != role) continue; 515 if (connection->avrcp_browsing_cid != browsing_cid) continue; 516 return connection; 517 } 518 return NULL; 519 } 520 521 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 522 btstack_linked_list_iterator_t it; 523 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 524 while (btstack_linked_list_iterator_has_next(&it)){ 525 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 526 if (connection->role != role) continue; 527 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 528 return connection; 529 } 530 return NULL; 531 } 532 533 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 534 btstack_linked_list_iterator_t it; 535 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 536 while (btstack_linked_list_iterator_has_next(&it)){ 537 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 538 if (connection->role != role) continue; 539 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 540 return connection->browsing_connection; 541 } 542 return NULL; 543 } 544 545 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 546 connection->wait_to_send = true; 547 l2cap_request_can_send_now_event(l2cap_cid); 548 } 549 550 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 551 do { 552 if (avrcp_cid_counter == 0xffff) { 553 avrcp_cid_counter = 1; 554 } else { 555 avrcp_cid_counter++; 556 } 557 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 558 return avrcp_cid_counter; 559 } 560 561 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 562 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 563 if (!connection){ 564 log_error("Not enough memory to create connection for role %d", role); 565 return NULL; 566 } 567 568 connection->state = AVCTP_CONNECTION_IDLE; 569 connection->role = role; 570 571 connection->transaction_id = 0xFF; 572 connection->transaction_id_counter = 0; 573 574 connection->controller_max_num_fragments = 0xFF; 575 576 // setup default unit / subunit info 577 connection->company_id = 0xffffff; 578 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 579 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 580 connection->target_subunit_info_data = avrcp_default_subunit_info; 581 582 log_info("avrcp_create_connection, role %d", role); 583 (void)memcpy(connection->remote_addr, remote_addr, 6); 584 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 585 return connection; 586 } 587 588 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 589 btstack_run_loop_remove_timer(&connection->retry_timer); 590 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 591 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 592 btstack_memory_avrcp_connection_free(connection); 593 } 594 595 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 596 btstack_assert(avrcp_callback != NULL); 597 598 uint8_t event[14]; 599 int pos = 0; 600 event[pos++] = HCI_EVENT_AVRCP_META; 601 event[pos++] = sizeof(event) - 2; 602 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 603 event[pos++] = status; 604 little_endian_store_16(event, pos, avrcp_cid); 605 pos += 2; 606 reverse_bd_addr(addr,&event[pos]); 607 pos += 6; 608 little_endian_store_16(event, pos, con_handle); 609 pos += 2; 610 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 611 } 612 613 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 614 btstack_assert(avrcp_callback != NULL); 615 616 uint8_t event[5]; 617 int pos = 0; 618 event[pos++] = HCI_EVENT_AVRCP_META; 619 event[pos++] = sizeof(event) - 2; 620 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 621 little_endian_store_16(event, pos, avrcp_cid); 622 pos += 2; 623 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 624 } 625 626 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 627 return avrcp_sdp_query_context.browsing_l2cap_psm; 628 } 629 630 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 631 des_iterator_t des_list_it; 632 des_iterator_t prot_it; 633 634 // Handle new SDP record 635 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 636 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 637 avrcp_sdp_query_context.parse_sdp_record = 0; 638 // log_info("SDP Record: Nr: %d", record_id); 639 } 640 641 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 642 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 643 644 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 645 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 646 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 647 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 648 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)) { 649 uint8_t * element = des_iterator_get_element(&des_list_it); 650 if (de_get_element_type(element) != DE_UUID) continue; 651 uint32_t uuid = de_get_uuid32(element); 652 switch (uuid){ 653 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 654 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 655 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 656 avrcp_sdp_query_context.parse_sdp_record = 1; 657 break; 658 default: 659 break; 660 } 661 } 662 break; 663 664 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 665 if (!avrcp_sdp_query_context.parse_sdp_record) break; 666 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 667 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)) { 668 uint8_t *des_element; 669 uint8_t *element; 670 uint32_t uuid; 671 672 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 673 674 des_element = des_iterator_get_element(&des_list_it); 675 des_iterator_init(&prot_it, des_element); 676 element = des_iterator_get_element(&prot_it); 677 678 if (de_get_element_type(element) != DE_UUID) continue; 679 680 uuid = de_get_uuid32(element); 681 des_iterator_next(&prot_it); 682 switch (uuid){ 683 case BLUETOOTH_PROTOCOL_L2CAP: 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_l2cap_psm); 686 break; 687 case BLUETOOTH_PROTOCOL_AVCTP: 688 if (!des_iterator_has_more(&prot_it)) continue; 689 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 690 break; 691 default: 692 break; 693 } 694 } 695 } 696 break; 697 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 698 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 699 if (!avrcp_sdp_query_context.parse_sdp_record) break; 700 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 701 702 des_iterator_t des_list_0_it; 703 uint8_t *element_0; 704 705 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 706 element_0 = des_iterator_get_element(&des_list_0_it); 707 708 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 709 uint8_t *des_element; 710 uint8_t *element; 711 uint32_t uuid; 712 713 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 714 715 des_element = des_iterator_get_element(&des_list_it); 716 des_iterator_init(&prot_it, des_element); 717 element = des_iterator_get_element(&prot_it); 718 719 if (de_get_element_type(element) != DE_UUID) continue; 720 721 uuid = de_get_uuid32(element); 722 des_iterator_next(&prot_it); 723 switch (uuid){ 724 case BLUETOOTH_PROTOCOL_L2CAP: 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_l2cap_psm); 727 break; 728 case BLUETOOTH_PROTOCOL_AVCTP: 729 if (!des_iterator_has_more(&prot_it)) continue; 730 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 731 break; 732 default: 733 break; 734 } 735 } 736 } 737 break; 738 default: 739 break; 740 } 741 } 742 } else { 743 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)); 744 } 745 } 746 747 static void avrcp_signaling_handle_sdp_query_complete(avrcp_connection_t * connection, uint8_t status){ 748 if (status == ERROR_CODE_SUCCESS){ 749 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 750 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 751 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 752 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 753 } else { 754 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 755 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 756 avrcp_finalize_connection(connection); 757 } 758 } 759 760 static void avrcp_handle_sdp_query_completed(avrcp_connection_t * connection, uint8_t status){ 761 btstack_assert(connection != NULL); 762 // SDP Signaling Query? 763 if (connection->state == AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE){ 764 avrcp_signaling_handle_sdp_query_complete(connection, status); 765 return; 766 } 767 // Browsing SDP <- Browsing Connection <- Existing SDP Connection => it wasn't an SDP query for signaling 768 if (avrcp_browsing_sdp_query_complete_handler != NULL){ 769 (*avrcp_browsing_sdp_query_complete_handler)(connection, status); 770 } 771 } 772 773 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 774 UNUSED(packet_type); 775 UNUSED(channel); 776 UNUSED(size); 777 778 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 779 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 780 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 781 782 if (!state_ok){ 783 // something wrong, nevertheless, start next sdp query if this one is complete 784 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 785 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 786 } 787 return; 788 } 789 790 uint8_t status; 791 792 switch (hci_event_packet_get_type(packet)){ 793 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 794 avrcp_handle_sdp_client_query_attribute_value(packet); 795 return; 796 797 case SDP_EVENT_QUERY_COMPLETE: 798 status = sdp_event_query_complete_get_status(packet); 799 800 if (status != ERROR_CODE_SUCCESS){ 801 avrcp_handle_sdp_query_completed(avrcp_controller_connection, status); 802 avrcp_handle_sdp_query_completed(avrcp_target_connection, status); 803 break; 804 } 805 806 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 807 avrcp_handle_sdp_query_completed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 808 avrcp_handle_sdp_query_completed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 809 break; 810 } 811 812 avrcp_handle_sdp_query_completed(avrcp_controller_connection, ERROR_CODE_SUCCESS); 813 avrcp_handle_sdp_query_completed(avrcp_target_connection, ERROR_CODE_SUCCESS); 814 815 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 816 break; 817 818 default: 819 return; 820 } 821 822 // register the SDP Query request to check if there is another connection waiting for the query 823 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 824 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 825 } 826 827 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){ 828 if (connection == NULL){ 829 connection = avrcp_create_connection(role, event_addr); 830 } 831 if (connection) { 832 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 833 connection->l2cap_signaling_cid = local_cid; 834 connection->avrcp_cid = avrcp_cid; 835 connection->con_handle = con_handle; 836 btstack_run_loop_remove_timer(&connection->retry_timer); 837 } 838 return connection; 839 } 840 841 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 842 connection->l2cap_signaling_cid = local_cid; 843 connection->l2cap_mtu = l2cap_mtu; 844 connection->con_handle = con_handle; 845 connection->incoming_declined = false; 846 connection->target_song_length_ms = 0xFFFFFFFF; 847 connection->target_song_position_ms = 0xFFFFFFFF; 848 memset(connection->target_track_id, 0xFF, 8); 849 connection->target_track_selected = false; 850 connection->target_track_changed = false; 851 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 852 connection->state = AVCTP_CONNECTION_OPENED; 853 854 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); 855 } 856 857 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 858 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 859 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 860 if (connection_controller == NULL) return; 861 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 862 if (connection_target == NULL) return; 863 864 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 865 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 866 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 867 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 868 } 869 } 870 871 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 872 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 873 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 874 875 // add some jitter/randomness to reconnect delay 876 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 877 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 878 879 btstack_run_loop_add_timer(&connection->retry_timer); 880 } 881 882 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 883 return (avrcp_frame_type_t)((header & 0x02) >> 1); 884 } 885 886 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 887 UNUSED(channel); 888 UNUSED(size); 889 bd_addr_t event_addr; 890 uint16_t local_cid; 891 uint16_t l2cap_mtu; 892 uint8_t status; 893 bool decline_connection; 894 bool outoing_active; 895 hci_con_handle_t con_handle; 896 897 avrcp_connection_t * connection_controller; 898 avrcp_connection_t * connection_target; 899 bool can_send; 900 901 switch (packet_type) { 902 case HCI_EVENT_PACKET: 903 switch (hci_event_packet_get_type(packet)) { 904 905 case L2CAP_EVENT_INCOMING_CONNECTION: 906 btstack_assert(avrcp_controller_packet_handler != NULL); 907 btstack_assert(avrcp_target_packet_handler != NULL); 908 909 l2cap_event_incoming_connection_get_address(packet, event_addr); 910 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 911 con_handle = l2cap_event_incoming_connection_get_handle(packet); 912 913 outoing_active = false; 914 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 915 if (connection_target != NULL){ 916 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 917 outoing_active = true; 918 connection_target->incoming_declined = true; 919 } 920 } 921 922 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 923 if (connection_controller != NULL){ 924 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 925 outoing_active = true; 926 connection_controller->incoming_declined = true; 927 } 928 } 929 930 decline_connection = outoing_active; 931 if (decline_connection == false){ 932 uint16_t avrcp_cid; 933 if ((connection_controller == NULL) || (connection_target == NULL)){ 934 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 935 } else { 936 avrcp_cid = connection_controller->avrcp_cid; 937 } 938 // create two connection objects (both) 939 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 940 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 941 if ((connection_target == NULL) || (connection_controller == NULL)){ 942 decline_connection = true; 943 if (connection_target) { 944 avrcp_finalize_connection(connection_target); 945 } 946 if (connection_controller) { 947 avrcp_finalize_connection(connection_controller); 948 } 949 } 950 } 951 if (decline_connection){ 952 l2cap_decline_connection(local_cid); 953 } else { 954 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 955 l2cap_accept_connection(local_cid); 956 } 957 break; 958 959 case L2CAP_EVENT_CHANNEL_OPENED: 960 l2cap_event_channel_opened_get_address(packet, event_addr); 961 status = l2cap_event_channel_opened_get_status(packet); 962 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 963 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 964 con_handle = l2cap_event_channel_opened_get_handle(packet); 965 966 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 967 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 968 969 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 970 // outgoing: structs are cteated in avrcp_connect() 971 if ((connection_controller == NULL) || (connection_target == NULL)) { 972 break; 973 } 974 975 switch (status){ 976 case ERROR_CODE_SUCCESS: 977 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 978 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 979 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 980 return; 981 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 982 if (connection_controller->incoming_declined == true){ 983 log_info("Incoming connection was declined, and the outgoing failed"); 984 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 985 connection_controller->incoming_declined = false; 986 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 987 connection_target->incoming_declined = false; 988 avrcp_retry_timer_start(connection_controller); 989 return; 990 } 991 break; 992 default: 993 break; 994 } 995 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 996 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 997 avrcp_finalize_connection(connection_controller); 998 avrcp_finalize_connection(connection_target); 999 1000 break; 1001 1002 case L2CAP_EVENT_CHANNEL_CLOSED: 1003 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1004 1005 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1006 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1007 if ((connection_controller == NULL) || (connection_target == NULL)) { 1008 break; 1009 } 1010 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 1011 avrcp_finalize_connection(connection_controller); 1012 avrcp_finalize_connection(connection_target); 1013 break; 1014 1015 case L2CAP_EVENT_CAN_SEND_NOW: 1016 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 1017 can_send = true; 1018 1019 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1020 if ((connection_target != NULL) && connection_target->wait_to_send){ 1021 connection_target->wait_to_send = false; 1022 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1023 can_send = false; 1024 } 1025 1026 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1027 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 1028 if (can_send){ 1029 connection_controller->wait_to_send = false; 1030 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1031 } else { 1032 l2cap_request_can_send_now_event(local_cid); 1033 } 1034 } 1035 break; 1036 1037 default: 1038 break; 1039 } 1040 break; 1041 1042 case L2CAP_DATA_PACKET: 1043 switch (avrcp_get_frame_type(packet[0])){ 1044 case AVRCP_RESPONSE_FRAME: 1045 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1046 break; 1047 case AVRCP_COMMAND_FRAME: 1048 default: // make compiler happy 1049 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1050 break; 1051 } 1052 break; 1053 1054 default: 1055 break; 1056 } 1057 } 1058 1059 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1060 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1061 if (!connection_controller){ 1062 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1063 } 1064 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1065 if (!connection_target){ 1066 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1067 } 1068 if (connection_controller->browsing_connection){ 1069 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1070 } 1071 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1072 return ERROR_CODE_SUCCESS; 1073 } 1074 1075 static void avrcp_handle_start_sdp_client_query(void * context){ 1076 UNUSED(context); 1077 1078 btstack_linked_list_iterator_t it; 1079 btstack_linked_list_iterator_init(&it, &avrcp_connections); 1080 while (btstack_linked_list_iterator_has_next(&it)){ 1081 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 1082 1083 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 1084 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1085 1086 // prevent triggering SDP query twice (for each role once) 1087 avrcp_connection_t * connection_with_opposite_role; 1088 switch (connection->role){ 1089 case AVRCP_CONTROLLER: 1090 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 1091 break; 1092 case AVRCP_TARGET: 1093 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 1094 break; 1095 default: 1096 btstack_assert(false); 1097 return; 1098 } 1099 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1100 1101 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 1102 avrcp_sdp_query_context.avrcp_version = 0; 1103 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 1104 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 1105 return; 1106 } 1107 } 1108 1109 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1110 btstack_assert(avrcp_controller_packet_handler != NULL); 1111 btstack_assert(avrcp_target_packet_handler != NULL); 1112 1113 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1114 if (connection_controller){ 1115 return ERROR_CODE_COMMAND_DISALLOWED; 1116 } 1117 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1118 if (connection_target){ 1119 return ERROR_CODE_COMMAND_DISALLOWED; 1120 } 1121 1122 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1123 1124 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1125 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1126 1127 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1128 if (!connection_target){ 1129 avrcp_finalize_connection(connection_controller); 1130 return BTSTACK_MEMORY_ALLOC_FAILED; 1131 } 1132 1133 if (avrcp_cid != NULL){ 1134 *avrcp_cid = cid; 1135 } 1136 1137 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1138 connection_controller->avrcp_cid = cid; 1139 1140 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1141 connection_target->avrcp_cid = cid; 1142 1143 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1144 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1145 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1146 return ERROR_CODE_SUCCESS; 1147 } 1148 1149 void avrcp_init(void){ 1150 avrcp_connections = NULL; 1151 if (avrcp_l2cap_service_registered) return; 1152 1153 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1154 if (status != ERROR_CODE_SUCCESS) return; 1155 avrcp_l2cap_service_registered = true; 1156 } 1157 1158 void avrcp_deinit(void){ 1159 avrcp_l2cap_service_registered = false; 1160 1161 avrcp_cid_counter = 0; 1162 avrcp_connections = NULL; 1163 1164 avrcp_callback = NULL; 1165 avrcp_controller_packet_handler = NULL; 1166 avrcp_target_packet_handler = NULL; 1167 1168 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1169 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1170 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1171 } 1172 1173 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1174 avrcp_controller_packet_handler = callback; 1175 } 1176 1177 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1178 avrcp_target_packet_handler = callback; 1179 } 1180 1181 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1182 btstack_assert(callback != NULL); 1183 avrcp_callback = callback; 1184 } 1185 1186 void avrcp_register_browsing_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1187 btstack_assert(callback != NULL); 1188 avrcp_browsing_sdp_query_complete_handler = callback; 1189 } 1190 1191 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1192 #define FUZZ_CID 0x44 1193 #define FUZZ_CON_HANDLE 0x0001 1194 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1195 void avrcp_init_fuzz(void){ 1196 // setup avrcp connections for cid 1197 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1198 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1199 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1200 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1201 } 1202 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1203 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1204 } 1205 #endif 1206