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 static void avrcp_start_next_sdp_query(void); 68 69 static const char * avrcp_default_controller_service_name = "BTstack AVRCP Controller Service"; 70 static const char * avrcp_default_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 71 static const char * avrcp_defaul_target_service_name = "BTstack AVRCP Target Service"; 72 static const char * avrcp_default_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 73 74 static const char * avrcp_subunit_type_name[] = { 75 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 76 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 77 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 78 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 79 }; 80 81 // default subunit info: single PANEL subunit 82 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 83 84 // globals 85 static bool avrcp_l2cap_service_registered = false; 86 87 // connections 88 static uint16_t avrcp_cid_counter; 89 static btstack_linked_list_t avrcp_connections; 90 91 // higher layer callbacks 92 static btstack_packet_handler_t avrcp_callback; 93 static btstack_packet_handler_t avrcp_controller_packet_handler; 94 static btstack_packet_handler_t avrcp_target_packet_handler; 95 96 // sdp query 97 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 98 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 99 static uint8_t avrcp_sdp_query_attribute_value[45]; 100 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 101 102 static void (*avrcp_browsing_sdp_query_complete_handler)(avrcp_connection_t * connection, uint8_t status); 103 104 105 const char * avrcp_subunit2str(uint16_t index){ 106 if (index <= 11) return avrcp_subunit_type_name[index]; 107 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 108 return avrcp_subunit_type_name[16]; 109 } 110 111 static const char * avrcp_event_name[] = { 112 "ERROR", "PLAYBACK_STATUS_CHANGED", 113 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 114 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 115 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 116 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 117 }; 118 const char * avrcp_event2str(uint16_t index){ 119 if (index <= 0x0d) return avrcp_event_name[index]; 120 return avrcp_event_name[0]; 121 } 122 123 static const char * avrcp_operation_name[] = { 124 "SKIP", NULL, NULL, NULL, NULL, 125 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 126 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 127 }; 128 129 const char * avrcp_operation2str(uint8_t operation_id){ 130 char * name = NULL; 131 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 132 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 133 } 134 if (name == NULL){ 135 static char buffer[13]; 136 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 137 buffer[sizeof(buffer)-1] = 0; 138 return buffer; 139 } else { 140 return name; 141 } 142 } 143 144 static const char * avrcp_media_attribute_id_name[] = { 145 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 146 }; 147 const char * avrcp_attribute2str(uint8_t index){ 148 if (index > 7){ 149 index = 0; 150 } 151 return avrcp_media_attribute_id_name[0]; 152 } 153 154 static const char * avrcp_play_status_name[] = { 155 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 156 "ERROR" // 0xFF 157 }; 158 const char * avrcp_play_status2str(uint8_t index){ 159 if (index > 4){ 160 index = 5; 161 } 162 return avrcp_play_status_name[index]; 163 } 164 165 static const char * avrcp_ctype_name[] = { 166 "CONTROL", 167 "STATUS", 168 "SPECIFIC_INQUIRY", 169 "NOTIFY", 170 "GENERAL_INQUIRY", 171 "RESERVED5", 172 "RESERVED6", 173 "RESERVED7", 174 "NOT IMPLEMENTED IN REMOTE", 175 "ACCEPTED BY REMOTE", 176 "REJECTED BY REMOTE", 177 "IN_TRANSITION", 178 "IMPLEMENTED_STABLE", 179 "CHANGED_STABLE", 180 "RESERVED", 181 "INTERIM" 182 }; 183 static const uint16_t avrcp_ctype_name_num = 16; 184 185 const char * avrcp_ctype2str(uint8_t index){ 186 if (index < avrcp_ctype_name_num){ 187 return avrcp_ctype_name[index]; 188 } 189 return "NONE"; 190 } 191 192 static const char * avrcp_shuffle_mode_name[] = { 193 "SHUFFLE OFF", 194 "SHUFFLE ALL TRACKS", 195 "SHUFFLE GROUP" 196 }; 197 198 const char * avrcp_shuffle2str(uint8_t index){ 199 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 200 return "NONE"; 201 } 202 203 static const char * avrcp_repeat_mode_name[] = { 204 "REPEAT OFF", 205 "REPEAT SINGLE TRACK", 206 "REPEAT ALL TRACKS", 207 "REPEAT GROUP" 208 }; 209 210 const char * avrcp_repeat2str(uint8_t index){ 211 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 212 return "NONE"; 213 } 214 215 static const char * notification_name[] = { 216 "INVALID_INDEX", 217 "PLAYBACK_STATUS_CHANGED", 218 "TRACK_CHANGED", 219 "TRACK_REACHED_END", 220 "TRACK_REACHED_START", 221 "PLAYBACK_POS_CHANGED", 222 "BATT_STATUS_CHANGED", 223 "SYSTEM_STATUS_CHANGED", 224 "PLAYER_APPLICATION_SETTING_CHANGED", 225 "NOW_PLAYING_CONTENT_CHANGED", 226 "AVAILABLE_PLAYERS_CHANGED", 227 "ADDRESSED_PLAYER_CHANGED", 228 "UIDS_CHANGED", 229 "VOLUME_CHANGED", 230 "MAX_VALUE" 231 }; 232 233 const char * avrcp_notification2str(avrcp_notification_event_id_t index){ 234 if ((index >= AVRCP_NOTIFICATION_EVENT_FIRST_INDEX) && (index <= AVRCP_NOTIFICATION_EVENT_LAST_INDEX)){ 235 return notification_name[index]; 236 } 237 return notification_name[0]; 238 } 239 240 btstack_linked_list_t avrcp_get_connections(void){ 241 return avrcp_connections; 242 } 243 244 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 245 uint8_t cmd_opcode_index = 5; 246 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 247 return packet[cmd_opcode_index]; 248 } 249 250 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 251 const char * service_name, const char * service_provider_name){ 252 uint8_t* attribute; 253 de_create_sequence(service); 254 255 // 0x0000 "Service Record Handle" 256 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 257 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 258 259 // 0x0001 "Service Class ID List" 260 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 261 attribute = de_push_sequence(service); 262 { 263 if (controller){ 264 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 265 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 266 } else { 267 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 268 } 269 } 270 de_pop_sequence(service, attribute); 271 272 // 0x0004 "Protocol Descriptor List" 273 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 274 attribute = de_push_sequence(service); 275 { 276 uint8_t* l2cpProtocol = de_push_sequence(attribute); 277 { 278 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 279 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 280 } 281 de_pop_sequence(attribute, l2cpProtocol); 282 283 uint8_t* avctpProtocol = de_push_sequence(attribute); 284 { 285 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 286 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 287 } 288 de_pop_sequence(attribute, avctpProtocol); 289 } 290 de_pop_sequence(service, attribute); 291 292 // 0x0005 "Public Browse Group" 293 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 294 attribute = de_push_sequence(service); 295 { 296 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 297 } 298 de_pop_sequence(service, attribute); 299 300 // 0x0009 "Bluetooth Profile Descriptor List" 301 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 302 attribute = de_push_sequence(service); 303 { 304 uint8_t *avrcProfile = de_push_sequence(attribute); 305 { 306 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 307 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 308 } 309 de_pop_sequence(attribute, avrcProfile); 310 } 311 de_pop_sequence(service, attribute); 312 313 // 0x000d "Additional Bluetooth Profile Descriptor List" 314 if (browsing){ 315 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 316 attribute = de_push_sequence(service); 317 { 318 uint8_t * des = de_push_sequence(attribute); 319 { 320 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 321 { 322 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 323 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 324 } 325 de_pop_sequence(des, browsing_l2cpProtocol); 326 327 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 328 { 329 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 330 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 331 } 332 de_pop_sequence(des, browsing_avctpProtocol); 333 } 334 de_pop_sequence(attribute, des); 335 } 336 de_pop_sequence(service, attribute); 337 } 338 339 340 // 0x0100 "Service Name" 341 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 342 if (service_name){ 343 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 344 } else { 345 if (controller){ 346 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 347 } else { 348 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 349 } 350 } 351 352 // 0x0100 "Provider Name" 353 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 354 if (service_provider_name){ 355 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 356 } else { 357 if (controller){ 358 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 359 } else { 360 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 361 } 362 } 363 364 // 0x0311 "Supported Features" 365 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 366 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 367 } 368 369 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 370 switch (avctp_packet_type){ 371 case AVCTP_SINGLE_PACKET: 372 // AVCTP message: transport header (1), pid (2) 373 return 3; 374 case AVCTP_START_PACKET: 375 // AVCTP message: transport header (1), num_packets (1), pid (2) 376 return 4; 377 default: 378 // AVCTP message: transport header (1) 379 return 1; 380 } 381 } 382 383 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 384 switch (avctp_packet_type){ 385 case AVCTP_SINGLE_PACKET: 386 case AVCTP_START_PACKET: 387 break; 388 default: 389 return 0; 390 } 391 392 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 393 switch (command_opcode){ 394 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 395 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 396 break; 397 case AVRCP_CMD_OPCODE_PASS_THROUGH: 398 offset += 3; // AVRCP message: operation id (1), param_len (2) 399 break; 400 default: 401 break; 402 } 403 return offset; 404 } 405 406 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){ 407 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 408 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 409 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 410 411 btstack_assert(max_frame_size >= payload_offset); 412 return (max_frame_size - payload_offset); 413 } 414 415 416 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 417 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 418 return AVCTP_SINGLE_PACKET; 419 } 420 421 if (connection->data_offset == 0){ 422 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 423 connection->command_opcode, 424 AVCTP_SINGLE_PACKET); 425 if (max_payload_size_for_single_packet >= connection->data_len){ 426 *max_payload_size = max_payload_size_for_single_packet; 427 return AVCTP_SINGLE_PACKET; 428 } else { 429 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 430 *max_payload_size = max_payload_size_for_start_packet; 431 return AVCTP_START_PACKET; 432 } 433 } else { 434 // both packet types have the same single byte AVCTP header 435 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 436 connection->command_opcode, 437 AVCTP_CONTINUE_PACKET); 438 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 439 return AVCTP_CONTINUE_PACKET; 440 } else { 441 return AVCTP_END_PACKET; 442 } 443 } 444 } 445 446 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 447 switch (connection->avctp_packet_type) { 448 case AVCTP_SINGLE_PACKET: 449 case AVCTP_START_PACKET: 450 break; 451 default: 452 return connection->avrcp_packet_type; 453 } 454 455 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 456 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 457 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 458 459 if (connection->data_offset == 0){ 460 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 461 return AVRCP_SINGLE_PACKET; 462 } else { 463 return AVRCP_START_PACKET; 464 } 465 } else { 466 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 467 return AVRCP_CONTINUE_PACKET; 468 } else { 469 return AVRCP_END_PACKET; 470 } 471 } 472 } 473 474 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 475 btstack_linked_list_iterator_t it; 476 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 477 while (btstack_linked_list_iterator_has_next(&it)){ 478 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 479 if (connection->role != role) continue; 480 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 481 return connection; 482 } 483 return NULL; 484 } 485 486 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 487 btstack_linked_list_iterator_t it; 488 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 489 while (btstack_linked_list_iterator_has_next(&it)){ 490 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 491 if (connection->role != role) continue; 492 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 493 return connection; 494 } 495 return NULL; 496 } 497 498 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 499 btstack_linked_list_iterator_t it; 500 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 501 while (btstack_linked_list_iterator_has_next(&it)){ 502 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 503 if (connection->role != role) continue; 504 if (connection->avrcp_cid != avrcp_cid) continue; 505 return connection; 506 } 507 return NULL; 508 } 509 510 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 511 btstack_linked_list_iterator_t it; 512 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 513 while (btstack_linked_list_iterator_has_next(&it)){ 514 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 515 if (connection->role != role) continue; 516 if (connection->avrcp_browsing_cid != browsing_cid) continue; 517 return connection; 518 } 519 return NULL; 520 } 521 522 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 523 btstack_linked_list_iterator_t it; 524 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 525 while (btstack_linked_list_iterator_has_next(&it)){ 526 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 527 if (connection->role != role) continue; 528 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 529 return connection; 530 } 531 return NULL; 532 } 533 534 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 535 btstack_linked_list_iterator_t it; 536 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 537 while (btstack_linked_list_iterator_has_next(&it)){ 538 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 539 if (connection->role != role) continue; 540 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 541 return connection->browsing_connection; 542 } 543 return NULL; 544 } 545 546 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 547 connection->wait_to_send = true; 548 l2cap_request_can_send_now_event(l2cap_cid); 549 } 550 551 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 552 do { 553 if (avrcp_cid_counter == 0xffff) { 554 avrcp_cid_counter = 1; 555 } else { 556 avrcp_cid_counter++; 557 } 558 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 559 return avrcp_cid_counter; 560 } 561 562 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 563 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 564 if (!connection){ 565 log_error("Not enough memory to create connection for role %d", role); 566 return NULL; 567 } 568 569 connection->state = AVCTP_CONNECTION_IDLE; 570 connection->role = role; 571 572 connection->transaction_id = 0xFF; 573 connection->transaction_id_counter = 0; 574 575 connection->controller_max_num_fragments = 0xFF; 576 577 // setup default unit / subunit info 578 connection->company_id = 0xffffff; 579 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 580 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 581 connection->target_subunit_info_data = avrcp_default_subunit_info; 582 583 log_info("avrcp_create_connection, role %d", role); 584 (void)memcpy(connection->remote_addr, remote_addr, 6); 585 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 586 return connection; 587 } 588 589 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 590 btstack_run_loop_remove_timer(&connection->retry_timer); 591 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 592 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 593 btstack_memory_avrcp_connection_free(connection); 594 } 595 596 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 597 btstack_assert(avrcp_callback != NULL); 598 599 uint8_t event[14]; 600 int pos = 0; 601 event[pos++] = HCI_EVENT_AVRCP_META; 602 event[pos++] = sizeof(event) - 2; 603 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 604 event[pos++] = status; 605 little_endian_store_16(event, pos, avrcp_cid); 606 pos += 2; 607 reverse_bd_addr(addr,&event[pos]); 608 pos += 6; 609 little_endian_store_16(event, pos, con_handle); 610 pos += 2; 611 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 612 } 613 614 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 615 btstack_assert(avrcp_callback != NULL); 616 617 uint8_t event[5]; 618 int pos = 0; 619 event[pos++] = HCI_EVENT_AVRCP_META; 620 event[pos++] = sizeof(event) - 2; 621 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 622 little_endian_store_16(event, pos, avrcp_cid); 623 pos += 2; 624 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 625 } 626 627 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 628 return avrcp_sdp_query_context.browsing_l2cap_psm; 629 } 630 631 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 632 des_iterator_t des_list_it; 633 des_iterator_t prot_it; 634 635 // Handle new SDP record 636 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 637 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 638 avrcp_sdp_query_context.parse_sdp_record = 0; 639 // log_info("SDP Record: Nr: %d", record_id); 640 } 641 642 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 643 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 644 645 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 646 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 647 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 648 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 649 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)) { 650 uint8_t * element = des_iterator_get_element(&des_list_it); 651 if (de_get_element_type(element) != DE_UUID) continue; 652 uint32_t uuid = de_get_uuid32(element); 653 switch (uuid){ 654 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 655 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 656 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 657 avrcp_sdp_query_context.parse_sdp_record = 1; 658 break; 659 default: 660 break; 661 } 662 } 663 break; 664 665 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 666 if (!avrcp_sdp_query_context.parse_sdp_record) break; 667 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 668 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)) { 669 uint8_t *des_element; 670 uint8_t *element; 671 uint32_t uuid; 672 673 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 674 675 des_element = des_iterator_get_element(&des_list_it); 676 des_iterator_init(&prot_it, des_element); 677 element = des_iterator_get_element(&prot_it); 678 679 if (de_get_element_type(element) != DE_UUID) continue; 680 681 uuid = de_get_uuid32(element); 682 des_iterator_next(&prot_it); 683 switch (uuid){ 684 case BLUETOOTH_PROTOCOL_L2CAP: 685 if (!des_iterator_has_more(&prot_it)) continue; 686 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 687 break; 688 case BLUETOOTH_PROTOCOL_AVCTP: 689 if (!des_iterator_has_more(&prot_it)) continue; 690 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 691 break; 692 default: 693 break; 694 } 695 } 696 } 697 break; 698 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 699 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 700 if (!avrcp_sdp_query_context.parse_sdp_record) break; 701 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 702 703 des_iterator_t des_list_0_it; 704 uint8_t *element_0; 705 706 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 707 element_0 = des_iterator_get_element(&des_list_0_it); 708 709 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 710 uint8_t *des_element; 711 uint8_t *element; 712 uint32_t uuid; 713 714 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 715 716 des_element = des_iterator_get_element(&des_list_it); 717 des_iterator_init(&prot_it, des_element); 718 element = des_iterator_get_element(&prot_it); 719 720 if (de_get_element_type(element) != DE_UUID) continue; 721 722 uuid = de_get_uuid32(element); 723 des_iterator_next(&prot_it); 724 switch (uuid){ 725 case BLUETOOTH_PROTOCOL_L2CAP: 726 if (!des_iterator_has_more(&prot_it)) continue; 727 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 728 break; 729 case BLUETOOTH_PROTOCOL_AVCTP: 730 if (!des_iterator_has_more(&prot_it)) continue; 731 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 732 break; 733 default: 734 break; 735 } 736 } 737 } 738 break; 739 default: 740 break; 741 } 742 } 743 } else { 744 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)); 745 } 746 } 747 748 static void avrcp_signaling_handle_sdp_query_complete(avrcp_connection_t * connection, uint8_t status){ 749 if (status == ERROR_CODE_SUCCESS){ 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 } else { 755 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 756 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 757 avrcp_finalize_connection(connection); 758 } 759 } 760 761 static void avrcp_handle_sdp_query_completed(avrcp_connection_t * connection, uint8_t status){ 762 btstack_assert(connection != NULL); 763 // SDP Signaling Query? 764 if (connection->state == AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE){ 765 avrcp_signaling_handle_sdp_query_complete(connection, status); 766 return; 767 } 768 // Browsing SDP <- Browsing Connection <- Existing SDP Connection => it wasn't an SDP query for signaling 769 if (avrcp_browsing_sdp_query_complete_handler != NULL){ 770 (*avrcp_browsing_sdp_query_complete_handler)(connection, status); 771 } 772 } 773 774 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 775 UNUSED(packet_type); 776 UNUSED(channel); 777 UNUSED(size); 778 779 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 780 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 781 bool state_ok = (avrcp_target_connection != NULL) && (avrcp_controller_connection != NULL); 782 783 if (!state_ok){ 784 // something wrong, nevertheless, start next sdp query if this one is complete 785 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 786 avrcp_start_next_sdp_query(); 787 } 788 return; 789 } 790 791 uint8_t status; 792 793 switch (hci_event_packet_get_type(packet)){ 794 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 795 avrcp_handle_sdp_client_query_attribute_value(packet); 796 return; 797 798 case SDP_EVENT_QUERY_COMPLETE: 799 status = sdp_event_query_complete_get_status(packet); 800 801 if (status != ERROR_CODE_SUCCESS){ 802 avrcp_handle_sdp_query_completed(avrcp_controller_connection, status); 803 avrcp_handle_sdp_query_completed(avrcp_target_connection, status); 804 break; 805 } 806 807 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 808 avrcp_handle_sdp_query_completed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 809 avrcp_handle_sdp_query_completed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 810 break; 811 } 812 813 avrcp_handle_sdp_query_completed(avrcp_controller_connection, ERROR_CODE_SUCCESS); 814 avrcp_handle_sdp_query_completed(avrcp_target_connection, ERROR_CODE_SUCCESS); 815 816 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 817 break; 818 819 default: 820 return; 821 } 822 823 avrcp_start_next_sdp_query(); 824 } 825 826 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 827 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 828 if (!connection_controller){ 829 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 830 } 831 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 832 if (!connection_target){ 833 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 834 } 835 if (connection_controller->browsing_connection){ 836 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 837 } 838 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 839 return ERROR_CODE_SUCCESS; 840 } 841 842 static void avrcp_handle_start_sdp_client_query(void * context){ 843 UNUSED(context); 844 845 btstack_linked_list_iterator_t it; 846 btstack_linked_list_iterator_init(&it, &avrcp_connections); 847 while (btstack_linked_list_iterator_has_next(&it)){ 848 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 849 850 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 851 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 852 853 // prevent triggering SDP query twice (for each role once) 854 avrcp_connection_t * connection_with_opposite_role; 855 switch (connection->role){ 856 case AVRCP_CONTROLLER: 857 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 858 break; 859 case AVRCP_TARGET: 860 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 861 break; 862 default: 863 btstack_assert(false); 864 return; 865 } 866 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 867 868 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 869 avrcp_sdp_query_context.avrcp_version = 0; 870 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 871 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 872 return; 873 } 874 } 875 876 static void avrcp_start_next_sdp_query(void) { 877 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 878 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 879 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 880 } 881 882 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){ 883 if (connection == NULL){ 884 connection = avrcp_create_connection(role, event_addr); 885 } 886 if (connection) { 887 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 888 connection->l2cap_signaling_cid = local_cid; 889 connection->avrcp_cid = avrcp_cid; 890 connection->con_handle = con_handle; 891 btstack_run_loop_remove_timer(&connection->retry_timer); 892 } 893 return connection; 894 } 895 896 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 897 connection->l2cap_signaling_cid = local_cid; 898 connection->l2cap_mtu = l2cap_mtu; 899 connection->con_handle = con_handle; 900 connection->incoming_declined = false; 901 connection->target_song_length_ms = 0xFFFFFFFF; 902 connection->target_song_position_ms = 0xFFFFFFFF; 903 memset(connection->target_track_id, 0xFF, 8); 904 connection->target_track_selected = false; 905 connection->target_track_changed = false; 906 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 907 connection->state = AVCTP_CONNECTION_OPENED; 908 909 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); 910 } 911 912 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 913 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 914 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 915 if (connection_controller == NULL) return; 916 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 917 if (connection_target == NULL) return; 918 919 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 920 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 921 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 922 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 923 } 924 } 925 926 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 927 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 928 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 929 930 // add some jitter/randomness to reconnect delay 931 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 932 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 933 934 btstack_run_loop_add_timer(&connection->retry_timer); 935 } 936 937 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 938 return (avrcp_frame_type_t)((header & 0x02) >> 1); 939 } 940 941 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 942 UNUSED(channel); 943 UNUSED(size); 944 bd_addr_t event_addr; 945 uint16_t local_cid; 946 uint16_t l2cap_mtu; 947 uint8_t status; 948 bool decline_connection; 949 bool outoing_active; 950 hci_con_handle_t con_handle; 951 952 avrcp_connection_t * connection_controller; 953 avrcp_connection_t * connection_target; 954 bool can_send; 955 956 switch (packet_type) { 957 case HCI_EVENT_PACKET: 958 switch (hci_event_packet_get_type(packet)) { 959 960 case L2CAP_EVENT_INCOMING_CONNECTION: 961 btstack_assert(avrcp_controller_packet_handler != NULL); 962 btstack_assert(avrcp_target_packet_handler != NULL); 963 964 l2cap_event_incoming_connection_get_address(packet, event_addr); 965 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 966 con_handle = l2cap_event_incoming_connection_get_handle(packet); 967 968 outoing_active = false; 969 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 970 if (connection_target != NULL){ 971 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 972 outoing_active = true; 973 connection_target->incoming_declined = true; 974 } 975 } 976 977 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 978 if (connection_controller != NULL){ 979 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 980 outoing_active = true; 981 connection_controller->incoming_declined = true; 982 } 983 } 984 985 decline_connection = outoing_active; 986 if (decline_connection == false){ 987 uint16_t avrcp_cid; 988 if ((connection_controller == NULL) || (connection_target == NULL)){ 989 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 990 } else { 991 avrcp_cid = connection_controller->avrcp_cid; 992 } 993 // create two connection objects (both) 994 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 995 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 996 if ((connection_target == NULL) || (connection_controller == NULL)){ 997 decline_connection = true; 998 if (connection_target) { 999 avrcp_finalize_connection(connection_target); 1000 } 1001 if (connection_controller) { 1002 avrcp_finalize_connection(connection_controller); 1003 } 1004 } 1005 } 1006 if (decline_connection){ 1007 l2cap_decline_connection(local_cid); 1008 } else { 1009 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 1010 l2cap_accept_connection(local_cid); 1011 } 1012 break; 1013 1014 case L2CAP_EVENT_CHANNEL_OPENED: 1015 l2cap_event_channel_opened_get_address(packet, event_addr); 1016 status = l2cap_event_channel_opened_get_status(packet); 1017 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 1018 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 1019 con_handle = l2cap_event_channel_opened_get_handle(packet); 1020 1021 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 1022 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 1023 1024 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 1025 // outgoing: structs are cteated in avrcp_connect() 1026 if ((connection_controller == NULL) || (connection_target == NULL)) { 1027 break; 1028 } 1029 1030 switch (status){ 1031 case ERROR_CODE_SUCCESS: 1032 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 1033 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 1034 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1035 return; 1036 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 1037 if (connection_controller->incoming_declined == true){ 1038 log_info("Incoming connection was declined, and the outgoing failed"); 1039 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1040 connection_controller->incoming_declined = false; 1041 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 1042 connection_target->incoming_declined = false; 1043 avrcp_retry_timer_start(connection_controller); 1044 return; 1045 } 1046 break; 1047 default: 1048 break; 1049 } 1050 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 1051 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 1052 avrcp_finalize_connection(connection_controller); 1053 avrcp_finalize_connection(connection_target); 1054 1055 break; 1056 1057 case L2CAP_EVENT_CHANNEL_CLOSED: 1058 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 1059 1060 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1061 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1062 if ((connection_controller == NULL) || (connection_target == NULL)) { 1063 break; 1064 } 1065 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 1066 avrcp_finalize_connection(connection_controller); 1067 avrcp_finalize_connection(connection_target); 1068 break; 1069 1070 case L2CAP_EVENT_CAN_SEND_NOW: 1071 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 1072 can_send = true; 1073 1074 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 1075 if ((connection_target != NULL) && connection_target->wait_to_send){ 1076 connection_target->wait_to_send = false; 1077 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1078 can_send = false; 1079 } 1080 1081 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 1082 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 1083 if (can_send){ 1084 connection_controller->wait_to_send = false; 1085 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 1086 } else { 1087 l2cap_request_can_send_now_event(local_cid); 1088 } 1089 } 1090 break; 1091 1092 default: 1093 break; 1094 } 1095 break; 1096 1097 case L2CAP_DATA_PACKET: 1098 switch (avrcp_get_frame_type(packet[0])){ 1099 case AVRCP_RESPONSE_FRAME: 1100 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1101 break; 1102 case AVRCP_COMMAND_FRAME: 1103 default: // make compiler happy 1104 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1105 break; 1106 } 1107 break; 1108 1109 default: 1110 break; 1111 } 1112 } 1113 1114 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1115 btstack_assert(avrcp_controller_packet_handler != NULL); 1116 btstack_assert(avrcp_target_packet_handler != NULL); 1117 1118 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1119 if (connection_controller){ 1120 return ERROR_CODE_COMMAND_DISALLOWED; 1121 } 1122 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1123 if (connection_target){ 1124 return ERROR_CODE_COMMAND_DISALLOWED; 1125 } 1126 1127 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1128 1129 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1130 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1131 1132 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1133 if (!connection_target){ 1134 avrcp_finalize_connection(connection_controller); 1135 return BTSTACK_MEMORY_ALLOC_FAILED; 1136 } 1137 1138 if (avrcp_cid != NULL){ 1139 *avrcp_cid = cid; 1140 } 1141 1142 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1143 connection_controller->avrcp_cid = cid; 1144 1145 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1146 connection_target->avrcp_cid = cid; 1147 1148 avrcp_start_next_sdp_query(); 1149 return ERROR_CODE_SUCCESS; 1150 } 1151 1152 void avrcp_init(void){ 1153 avrcp_connections = NULL; 1154 if (avrcp_l2cap_service_registered) return; 1155 1156 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1157 if (status != ERROR_CODE_SUCCESS) return; 1158 avrcp_l2cap_service_registered = true; 1159 } 1160 1161 void avrcp_deinit(void){ 1162 avrcp_l2cap_service_registered = false; 1163 1164 avrcp_cid_counter = 0; 1165 avrcp_connections = NULL; 1166 1167 avrcp_callback = NULL; 1168 avrcp_controller_packet_handler = NULL; 1169 avrcp_target_packet_handler = NULL; 1170 1171 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1172 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1173 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1174 } 1175 1176 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1177 avrcp_controller_packet_handler = callback; 1178 } 1179 1180 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1181 avrcp_target_packet_handler = callback; 1182 } 1183 1184 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1185 btstack_assert(callback != NULL); 1186 avrcp_callback = callback; 1187 } 1188 1189 void avrcp_register_browsing_sdp_query_complete_handler(void (*callback)(avrcp_connection_t * connection, uint8_t status)){ 1190 btstack_assert(callback != NULL); 1191 avrcp_browsing_sdp_query_complete_handler = callback; 1192 } 1193 1194 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1195 #define FUZZ_CID 0x44 1196 #define FUZZ_CON_HANDLE 0x0001 1197 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1198 void avrcp_init_fuzz(void){ 1199 // setup avrcp connections for cid 1200 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1201 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1202 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1203 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1204 } 1205 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1206 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1207 } 1208 #endif 1209