1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "avrcp.c" 39 40 #include <stdint.h> 41 #include <string.h> 42 // snprintf 43 #include <stdio.h> 44 45 #include "bluetooth_psm.h" 46 #include "bluetooth_sdp.h" 47 #include "btstack_debug.h" 48 #include "btstack_event.h" 49 #include "btstack_memory.h" 50 #include "classic/sdp_client.h" 51 #include "classic/sdp_util.h" 52 #include "classic/avrcp.h" 53 54 55 typedef struct { 56 uint8_t parse_sdp_record; 57 uint32_t record_id; 58 uint16_t avrcp_cid; 59 uint16_t avrcp_l2cap_psm; 60 uint16_t avrcp_version; 61 62 uint16_t browsing_l2cap_psm; 63 uint16_t browsing_version; 64 } avrcp_sdp_query_context_t; 65 66 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size); 67 68 static const char * avrcp_default_controller_service_name = "BTstack AVRCP Controller Service"; 69 static const char * avrcp_default_controller_service_provider_name = "BTstack AVRCP Controller Service Provider"; 70 static const char * avrcp_defaul_target_service_name = "BTstack AVRCP Target Service"; 71 static const char * avrcp_default_target_service_provider_name = "BTstack AVRCP Target Service Provider"; 72 73 static const char * avrcp_subunit_type_name[] = { 74 "MONITOR", "AUDIO", "PRINTER", "DISC", "TAPE_RECORDER_PLAYER", "TUNER", 75 "CA", "CAMERA", "RESERVED", "PANEL", "BULLETIN_BOARD", "CAMERA_STORAGE", 76 "VENDOR_UNIQUE", "RESERVED_FOR_ALL_SUBUNIT_TYPES", 77 "EXTENDED_TO_NEXT_BYTE", "UNIT", "ERROR" 78 }; 79 80 // default subunit info: single PANEL subunit 81 static const uint8_t avrcp_default_subunit_info[] = { AVRCP_SUBUNIT_TYPE_PANEL << 3}; 82 83 // globals 84 static bool avrcp_l2cap_service_registered = false; 85 86 // connections 87 static uint16_t avrcp_cid_counter; 88 static btstack_linked_list_t avrcp_connections; 89 90 // higher layer callbacks 91 static btstack_packet_handler_t avrcp_callback; 92 static btstack_packet_handler_t avrcp_controller_packet_handler; 93 static btstack_packet_handler_t avrcp_target_packet_handler; 94 95 // sdp query 96 static btstack_context_callback_registration_t avrcp_sdp_query_registration; 97 static avrcp_sdp_query_context_t avrcp_sdp_query_context; 98 static uint8_t avrcp_sdp_query_attribute_value[45]; 99 static const unsigned int avrcp_sdp_query_attribute_value_buffer_size = sizeof(avrcp_sdp_query_attribute_value); 100 101 102 const char * avrcp_subunit2str(uint16_t index){ 103 if (index <= 11) return avrcp_subunit_type_name[index]; 104 if ((index >= 0x1C) && (index <= 0x1F)) return avrcp_subunit_type_name[index - 0x10]; 105 return avrcp_subunit_type_name[16]; 106 } 107 108 static const char * avrcp_event_name[] = { 109 "ERROR", "PLAYBACK_STATUS_CHANGED", 110 "TRACK_CHANGED", "TRACK_REACHED_END", "TRACK_REACHED_START", 111 "PLAYBACK_POS_CHANGED", "BATT_STATUS_CHANGED", "SYSTEM_STATUS_CHANGED", 112 "PLAYER_APPLICATION_SETTING_CHANGED", "NOW_PLAYING_CONTENT_CHANGED", 113 "AVAILABLE_PLAYERS_CHANGED", "ADDRESSED_PLAYER_CHANGED", "UIDS_CHANGED", "VOLUME_CHANGED" 114 }; 115 const char * avrcp_event2str(uint16_t index){ 116 if (index <= 0x0d) return avrcp_event_name[index]; 117 return avrcp_event_name[0]; 118 } 119 120 static const char * avrcp_operation_name[] = { 121 "SKIP", NULL, NULL, NULL, NULL, 122 "VOLUME_UP", "VOLUME_DOWN", "MUTE", "PLAY", "STOP", "PAUSE", NULL, 123 "REWIND", "FAST_FORWARD", NULL, "FORWARD", "BACKWARD" // 0x4C 124 }; 125 126 const char * avrcp_operation2str(uint8_t operation_id){ 127 char * name = NULL; 128 if ((operation_id >= AVRCP_OPERATION_ID_SKIP) && (operation_id <= AVRCP_OPERATION_ID_BACKWARD)){ 129 name = (char *)avrcp_operation_name[operation_id - AVRCP_OPERATION_ID_SKIP]; 130 } 131 if (name == NULL){ 132 static char buffer[13]; 133 snprintf(buffer, sizeof(buffer), "Unknown 0x%02x", operation_id); 134 buffer[sizeof(buffer)-1] = 0; 135 return buffer; 136 } else { 137 return name; 138 } 139 } 140 141 static const char * avrcp_media_attribute_id_name[] = { 142 "NONE", "TITLE", "ARTIST", "ALBUM", "TRACK", "TOTAL TRACKS", "GENRE", "SONG LENGTH" 143 }; 144 const char * avrcp_attribute2str(uint8_t index){ 145 if ((index >= 1) && (index <= 7)) return avrcp_media_attribute_id_name[index]; 146 return avrcp_media_attribute_id_name[0]; 147 } 148 149 static const char * avrcp_play_status_name[] = { 150 "STOPPED", "PLAYING", "PAUSED", "FORWARD SEEK", "REVERSE SEEK", 151 "ERROR" // 0xFF 152 }; 153 const char * avrcp_play_status2str(uint8_t index){ 154 if ((index >= 1) && (index <= 4)) return avrcp_play_status_name[index]; 155 return avrcp_play_status_name[5]; 156 } 157 158 static const char * avrcp_ctype_name[] = { 159 "CONTROL", 160 "STATUS", 161 "SPECIFIC_INQUIRY", 162 "NOTIFY", 163 "GENERAL_INQUIRY", 164 "RESERVED5", 165 "RESERVED6", 166 "RESERVED7", 167 "NOT IMPLEMENTED IN REMOTE", 168 "ACCEPTED BY REMOTE", 169 "REJECTED BY REMOTE", 170 "IN_TRANSITION", 171 "IMPLEMENTED_STABLE", 172 "CHANGED_STABLE", 173 "RESERVED", 174 "INTERIM" 175 }; 176 static const uint16_t avrcp_ctype_name_num = 16; 177 178 const char * avrcp_ctype2str(uint8_t index){ 179 if (index < avrcp_ctype_name_num){ 180 return avrcp_ctype_name[index]; 181 } 182 return "NONE"; 183 } 184 185 static const char * avrcp_shuffle_mode_name[] = { 186 "SHUFFLE OFF", 187 "SHUFFLE ALL TRACKS", 188 "SHUFFLE GROUP" 189 }; 190 191 const char * avrcp_shuffle2str(uint8_t index){ 192 if ((index >= 1) && (index <= 3)) return avrcp_shuffle_mode_name[index-1]; 193 return "NONE"; 194 } 195 196 static const char * avrcp_repeat_mode_name[] = { 197 "REPEAT OFF", 198 "REPEAT SINGLE TRACK", 199 "REPEAT ALL TRACKS", 200 "REPEAT GROUP" 201 }; 202 203 const char * avrcp_repeat2str(uint8_t index){ 204 if ((index >= 1) && (index <= 4)) return avrcp_repeat_mode_name[index-1]; 205 return "NONE"; 206 } 207 208 btstack_linked_list_t avrcp_get_connections(void){ 209 return avrcp_connections; 210 } 211 212 uint8_t avrcp_cmd_opcode(uint8_t *packet, uint16_t size){ 213 uint8_t cmd_opcode_index = 5; 214 if (cmd_opcode_index > size) return AVRCP_CMD_OPCODE_UNDEFINED; 215 return packet[cmd_opcode_index]; 216 } 217 218 void avrcp_create_sdp_record(uint8_t controller, uint8_t * service, uint32_t service_record_handle, uint8_t browsing, uint16_t supported_features, 219 const char * service_name, const char * service_provider_name){ 220 uint8_t* attribute; 221 de_create_sequence(service); 222 223 // 0x0000 "Service Record Handle" 224 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_RECORD_HANDLE); 225 de_add_number(service, DE_UINT, DE_SIZE_32, service_record_handle); 226 227 // 0x0001 "Service Class ID List" 228 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST); 229 attribute = de_push_sequence(service); 230 { 231 if (controller){ 232 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 233 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER); 234 } else { 235 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET); 236 } 237 } 238 de_pop_sequence(service, attribute); 239 240 // 0x0004 "Protocol Descriptor List" 241 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST); 242 attribute = de_push_sequence(service); 243 { 244 uint8_t* l2cpProtocol = de_push_sequence(attribute); 245 { 246 de_add_number(l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 247 de_add_number(l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP); 248 } 249 de_pop_sequence(attribute, l2cpProtocol); 250 251 uint8_t* avctpProtocol = de_push_sequence(attribute); 252 { 253 de_add_number(avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // avctpProtocol_service 254 de_add_number(avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 255 } 256 de_pop_sequence(attribute, avctpProtocol); 257 } 258 de_pop_sequence(service, attribute); 259 260 // 0x0005 "Public Browse Group" 261 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BROWSE_GROUP_LIST); // public browse group 262 attribute = de_push_sequence(service); 263 { 264 de_add_number(attribute, DE_UUID, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_PUBLIC_BROWSE_ROOT); 265 } 266 de_pop_sequence(service, attribute); 267 268 // 0x0009 "Bluetooth Profile Descriptor List" 269 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_BLUETOOTH_PROFILE_DESCRIPTOR_LIST); 270 attribute = de_push_sequence(service); 271 { 272 uint8_t *avrcProfile = de_push_sequence(attribute); 273 { 274 de_add_number(avrcProfile, DE_UUID, DE_SIZE_16, BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL); 275 de_add_number(avrcProfile, DE_UINT, DE_SIZE_16, 0x0106); 276 } 277 de_pop_sequence(attribute, avrcProfile); 278 } 279 de_pop_sequence(service, attribute); 280 281 // 0x000d "Additional Bluetooth Profile Descriptor List" 282 if (browsing){ 283 de_add_number(service, DE_UINT, DE_SIZE_16, BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS); 284 attribute = de_push_sequence(service); 285 { 286 uint8_t * des = de_push_sequence(attribute); 287 { 288 uint8_t* browsing_l2cpProtocol = de_push_sequence(des); 289 { 290 de_add_number(browsing_l2cpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_L2CAP); 291 de_add_number(browsing_l2cpProtocol, DE_UINT, DE_SIZE_16, BLUETOOTH_PSM_AVCTP_BROWSING); 292 } 293 de_pop_sequence(des, browsing_l2cpProtocol); 294 295 uint8_t* browsing_avctpProtocol = de_push_sequence(des); 296 { 297 de_add_number(browsing_avctpProtocol, DE_UUID, DE_SIZE_16, BLUETOOTH_PROTOCOL_AVCTP); // browsing_avctpProtocol_service 298 de_add_number(browsing_avctpProtocol, DE_UINT, DE_SIZE_16, 0x0104); // version 299 } 300 de_pop_sequence(des, browsing_avctpProtocol); 301 } 302 de_pop_sequence(attribute, des); 303 } 304 de_pop_sequence(service, attribute); 305 } 306 307 308 // 0x0100 "Service Name" 309 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0100); 310 if (service_name){ 311 de_add_data(service, DE_STRING, (uint16_t) strlen(service_name), (uint8_t *) service_name); 312 } else { 313 if (controller){ 314 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_name), (uint8_t *) avrcp_default_controller_service_name); 315 } else { 316 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_defaul_target_service_name), (uint8_t *) avrcp_defaul_target_service_name); 317 } 318 } 319 320 // 0x0100 "Provider Name" 321 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0102); 322 if (service_provider_name){ 323 de_add_data(service, DE_STRING, (uint16_t) strlen(service_provider_name), (uint8_t *) service_provider_name); 324 } else { 325 if (controller){ 326 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_controller_service_provider_name), (uint8_t *) avrcp_default_controller_service_provider_name); 327 } else { 328 de_add_data(service, DE_STRING, (uint16_t) strlen(avrcp_default_target_service_provider_name), (uint8_t *) avrcp_default_target_service_provider_name); 329 } 330 } 331 332 // 0x0311 "Supported Features" 333 de_add_number(service, DE_UINT, DE_SIZE_16, 0x0311); 334 de_add_number(service, DE_UINT, DE_SIZE_16, supported_features); 335 } 336 337 uint16_t avctp_get_num_bytes_for_header(avctp_packet_type_t avctp_packet_type) { 338 switch (avctp_packet_type){ 339 case AVCTP_SINGLE_PACKET: 340 // AVCTP message: transport header (1), pid (2) 341 return 3; 342 case AVCTP_START_PACKET: 343 // AVCTP message: transport header (1), num_packets (1), pid (2) 344 return 4; 345 default: 346 // AVCTP message: transport header (1) 347 return 1; 348 } 349 } 350 351 uint16_t avrcp_get_num_bytes_for_header(avrcp_command_opcode_t command_opcode, avctp_packet_type_t avctp_packet_type) { 352 switch (avctp_packet_type){ 353 case AVCTP_SINGLE_PACKET: 354 case AVCTP_START_PACKET: 355 break; 356 default: 357 return 0; 358 } 359 360 uint16_t offset = 3; // AVRCP message: cmd type (1), subunit (1), opcode (1) 361 switch (command_opcode){ 362 case AVRCP_CMD_OPCODE_VENDOR_DEPENDENT: 363 offset += 7; // AVRCP message: company (3), pdu id(1), AVRCP packet type (1), param_len (2) 364 break; 365 case AVRCP_CMD_OPCODE_PASS_THROUGH: 366 offset += 3; // AVRCP message: operation id (1), param_len (2) 367 break; 368 default: 369 break; 370 } 371 return offset; 372 } 373 374 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){ 375 uint16_t max_frame_size = btstack_min(l2cap_mtu, AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE); 376 uint16_t payload_offset = avctp_get_num_bytes_for_header(avctp_packet_type) + 377 avrcp_get_num_bytes_for_header(command_opcode, avctp_packet_type); 378 379 btstack_assert(max_frame_size >= payload_offset); 380 return (max_frame_size - payload_offset); 381 } 382 383 384 avctp_packet_type_t avctp_get_packet_type(avrcp_connection_t * connection, uint16_t * max_payload_size){ 385 if (connection->l2cap_mtu >= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 386 return AVCTP_SINGLE_PACKET; 387 } 388 389 if (connection->data_offset == 0){ 390 uint16_t max_payload_size_for_single_packet = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 391 connection->command_opcode, 392 AVCTP_SINGLE_PACKET); 393 if (max_payload_size_for_single_packet >= connection->data_len){ 394 *max_payload_size = max_payload_size_for_single_packet; 395 return AVCTP_SINGLE_PACKET; 396 } else { 397 uint16_t max_payload_size_for_start_packet = max_payload_size_for_single_packet - 1; 398 *max_payload_size = max_payload_size_for_start_packet; 399 return AVCTP_START_PACKET; 400 } 401 } else { 402 // both packet types have the same single byte AVCTP header 403 *max_payload_size = avrcp_get_num_free_bytes_for_payload(connection->l2cap_mtu, 404 connection->command_opcode, 405 AVCTP_CONTINUE_PACKET); 406 if ((connection->data_len - connection->data_offset) > *max_payload_size){ 407 return AVCTP_CONTINUE_PACKET; 408 } else { 409 return AVCTP_END_PACKET; 410 } 411 } 412 } 413 414 avrcp_packet_type_t avrcp_get_packet_type(avrcp_connection_t * connection){ 415 switch (connection->avctp_packet_type) { 416 case AVCTP_SINGLE_PACKET: 417 case AVCTP_START_PACKET: 418 break; 419 default: 420 return connection->avrcp_packet_type; 421 } 422 423 uint16_t payload_offset = avctp_get_num_bytes_for_header(connection->avctp_packet_type) + 424 avrcp_get_num_bytes_for_header(connection->command_opcode, connection->avctp_packet_type); 425 uint16_t bytes_to_send = (connection->data_len - connection->data_offset) + payload_offset; 426 427 if (connection->data_offset == 0){ 428 if (bytes_to_send <= AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 429 return AVRCP_SINGLE_PACKET; 430 } else { 431 return AVRCP_START_PACKET; 432 } 433 } else { 434 if (bytes_to_send > AVRCP_MAX_AV_C_MESSAGE_FRAME_SIZE){ 435 return AVRCP_CONTINUE_PACKET; 436 } else { 437 return AVRCP_END_PACKET; 438 } 439 } 440 } 441 442 avrcp_connection_t * avrcp_get_connection_for_bd_addr_for_role(avrcp_role_t role, bd_addr_t addr){ 443 btstack_linked_list_iterator_t it; 444 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 445 while (btstack_linked_list_iterator_has_next(&it)){ 446 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 447 if (connection->role != role) continue; 448 if (memcmp(addr, connection->remote_addr, 6) != 0) continue; 449 return connection; 450 } 451 return NULL; 452 } 453 454 avrcp_connection_t * avrcp_get_connection_for_l2cap_signaling_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 455 btstack_linked_list_iterator_t it; 456 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 457 while (btstack_linked_list_iterator_has_next(&it)){ 458 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 459 if (connection->role != role) continue; 460 if (connection->l2cap_signaling_cid != l2cap_cid) continue; 461 return connection; 462 } 463 return NULL; 464 } 465 466 avrcp_connection_t * avrcp_get_connection_for_avrcp_cid_for_role(avrcp_role_t role, uint16_t avrcp_cid){ 467 btstack_linked_list_iterator_t it; 468 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 469 while (btstack_linked_list_iterator_has_next(&it)){ 470 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 471 if (connection->role != role) continue; 472 if (connection->avrcp_cid != avrcp_cid) continue; 473 return connection; 474 } 475 return NULL; 476 } 477 478 avrcp_connection_t * avrcp_get_connection_for_browsing_cid_for_role(avrcp_role_t role, uint16_t browsing_cid){ 479 btstack_linked_list_iterator_t it; 480 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 481 while (btstack_linked_list_iterator_has_next(&it)){ 482 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 483 if (connection->role != role) continue; 484 if (connection->avrcp_browsing_cid != browsing_cid) continue; 485 return connection; 486 } 487 return NULL; 488 } 489 490 avrcp_connection_t * avrcp_get_connection_for_browsing_l2cap_cid_for_role(avrcp_role_t role, uint16_t browsing_l2cap_cid){ 491 btstack_linked_list_iterator_t it; 492 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 493 while (btstack_linked_list_iterator_has_next(&it)){ 494 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 495 if (connection->role != role) continue; 496 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != browsing_l2cap_cid)) continue; 497 return connection; 498 } 499 return NULL; 500 } 501 502 avrcp_browsing_connection_t * avrcp_get_browsing_connection_for_l2cap_cid_for_role(avrcp_role_t role, uint16_t l2cap_cid){ 503 btstack_linked_list_iterator_t it; 504 btstack_linked_list_iterator_init(&it, (btstack_linked_list_t *) &avrcp_connections); 505 while (btstack_linked_list_iterator_has_next(&it)){ 506 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 507 if (connection->role != role) continue; 508 if (connection->browsing_connection && (connection->browsing_connection->l2cap_browsing_cid != l2cap_cid)) continue; 509 return connection->browsing_connection; 510 } 511 return NULL; 512 } 513 514 void avrcp_request_can_send_now(avrcp_connection_t * connection, uint16_t l2cap_cid){ 515 connection->wait_to_send = true; 516 l2cap_request_can_send_now_event(l2cap_cid); 517 } 518 519 uint16_t avrcp_get_next_cid(avrcp_role_t role){ 520 do { 521 if (avrcp_cid_counter == 0xffff) { 522 avrcp_cid_counter = 1; 523 } else { 524 avrcp_cid_counter++; 525 } 526 } while (avrcp_get_connection_for_avrcp_cid_for_role(role, avrcp_cid_counter) != NULL) ; 527 return avrcp_cid_counter; 528 } 529 530 static avrcp_connection_t * avrcp_create_connection(avrcp_role_t role, bd_addr_t remote_addr){ 531 avrcp_connection_t * connection = btstack_memory_avrcp_connection_get(); 532 if (!connection){ 533 log_error("Not enough memory to create connection for role %d", role); 534 return NULL; 535 } 536 537 connection->state = AVCTP_CONNECTION_IDLE; 538 connection->role = role; 539 540 connection->transaction_id = 0xFF; 541 connection->transaction_id_counter = 0; 542 543 connection->controller_max_num_fragments = 0xFF; 544 545 // setup default unit / subunit info 546 connection->company_id = 0xffffff; 547 connection->target_unit_type = AVRCP_SUBUNIT_TYPE_PANEL; 548 connection->target_subunit_info_data_size = sizeof(avrcp_default_subunit_info); 549 connection->target_subunit_info_data = avrcp_default_subunit_info; 550 551 log_info("avrcp_create_connection, role %d", role); 552 (void)memcpy(connection->remote_addr, remote_addr, 6); 553 btstack_linked_list_add(&avrcp_connections, (btstack_linked_item_t *) connection); 554 return connection; 555 } 556 557 static void avrcp_finalize_connection(avrcp_connection_t * connection){ 558 btstack_run_loop_remove_timer(&connection->retry_timer); 559 btstack_run_loop_remove_timer(&connection->controller_press_and_hold_cmd_timer); 560 btstack_linked_list_remove(&avrcp_connections, (btstack_linked_item_t*) connection); 561 btstack_memory_avrcp_connection_free(connection); 562 } 563 564 static void avrcp_emit_connection_established(uint16_t avrcp_cid, bd_addr_t addr, hci_con_handle_t con_handle, uint8_t status){ 565 btstack_assert(avrcp_callback != NULL); 566 567 uint8_t event[14]; 568 int pos = 0; 569 event[pos++] = HCI_EVENT_AVRCP_META; 570 event[pos++] = sizeof(event) - 2; 571 event[pos++] = AVRCP_SUBEVENT_CONNECTION_ESTABLISHED; 572 event[pos++] = status; 573 little_endian_store_16(event, pos, avrcp_cid); 574 pos += 2; 575 reverse_bd_addr(addr,&event[pos]); 576 pos += 6; 577 little_endian_store_16(event, pos, con_handle); 578 pos += 2; 579 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 580 } 581 582 static void avrcp_emit_connection_closed(uint16_t avrcp_cid){ 583 btstack_assert(avrcp_callback != NULL); 584 585 uint8_t event[5]; 586 int pos = 0; 587 event[pos++] = HCI_EVENT_AVRCP_META; 588 event[pos++] = sizeof(event) - 2; 589 event[pos++] = AVRCP_SUBEVENT_CONNECTION_RELEASED; 590 little_endian_store_16(event, pos, avrcp_cid); 591 pos += 2; 592 (*avrcp_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event)); 593 } 594 595 uint16_t avrcp_sdp_query_browsing_l2cap_psm(void){ 596 return avrcp_sdp_query_context.browsing_l2cap_psm; 597 } 598 599 void avrcp_handle_sdp_client_query_attribute_value(uint8_t *packet){ 600 des_iterator_t des_list_it; 601 des_iterator_t prot_it; 602 603 // Handle new SDP record 604 if (sdp_event_query_attribute_byte_get_record_id(packet) != avrcp_sdp_query_context.record_id) { 605 avrcp_sdp_query_context.record_id = sdp_event_query_attribute_byte_get_record_id(packet); 606 avrcp_sdp_query_context.parse_sdp_record = 0; 607 // log_info("SDP Record: Nr: %d", record_id); 608 } 609 610 if (sdp_event_query_attribute_byte_get_attribute_length(packet) <= avrcp_sdp_query_attribute_value_buffer_size) { 611 avrcp_sdp_query_attribute_value[sdp_event_query_attribute_byte_get_data_offset(packet)] = sdp_event_query_attribute_byte_get_data(packet); 612 613 if ((uint16_t)(sdp_event_query_attribute_byte_get_data_offset(packet)+1) == sdp_event_query_attribute_byte_get_attribute_length(packet)) { 614 switch(sdp_event_query_attribute_byte_get_attribute_id(packet)) { 615 case BLUETOOTH_ATTRIBUTE_SERVICE_CLASS_ID_LIST: 616 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 617 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)) { 618 uint8_t * element = des_iterator_get_element(&des_list_it); 619 if (de_get_element_type(element) != DE_UUID) continue; 620 uint32_t uuid = de_get_uuid32(element); 621 switch (uuid){ 622 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_TARGET: 623 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL: 624 case BLUETOOTH_SERVICE_CLASS_AV_REMOTE_CONTROL_CONTROLLER: 625 avrcp_sdp_query_context.parse_sdp_record = 1; 626 break; 627 default: 628 break; 629 } 630 } 631 break; 632 633 case BLUETOOTH_ATTRIBUTE_PROTOCOL_DESCRIPTOR_LIST: { 634 if (!avrcp_sdp_query_context.parse_sdp_record) break; 635 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 636 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)) { 637 uint8_t *des_element; 638 uint8_t *element; 639 uint32_t uuid; 640 641 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 642 643 des_element = des_iterator_get_element(&des_list_it); 644 des_iterator_init(&prot_it, des_element); 645 element = des_iterator_get_element(&prot_it); 646 647 if (de_get_element_type(element) != DE_UUID) continue; 648 649 uuid = de_get_uuid32(element); 650 des_iterator_next(&prot_it); 651 switch (uuid){ 652 case BLUETOOTH_PROTOCOL_L2CAP: 653 if (!des_iterator_has_more(&prot_it)) continue; 654 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_l2cap_psm); 655 break; 656 case BLUETOOTH_PROTOCOL_AVCTP: 657 if (!des_iterator_has_more(&prot_it)) continue; 658 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.avrcp_version); 659 break; 660 default: 661 break; 662 } 663 } 664 } 665 break; 666 case BLUETOOTH_ATTRIBUTE_ADDITIONAL_PROTOCOL_DESCRIPTOR_LISTS: { 667 // log_info("SDP Attribute: 0x%04x", sdp_event_query_attribute_byte_get_attribute_id(packet)); 668 if (!avrcp_sdp_query_context.parse_sdp_record) break; 669 if (de_get_element_type(avrcp_sdp_query_attribute_value) != DE_DES) break; 670 671 des_iterator_t des_list_0_it; 672 uint8_t *element_0; 673 674 des_iterator_init(&des_list_0_it, avrcp_sdp_query_attribute_value); 675 element_0 = des_iterator_get_element(&des_list_0_it); 676 677 for (des_iterator_init(&des_list_it, element_0); des_iterator_has_more(&des_list_it); des_iterator_next(&des_list_it)) { 678 uint8_t *des_element; 679 uint8_t *element; 680 uint32_t uuid; 681 682 if (des_iterator_get_type(&des_list_it) != DE_DES) continue; 683 684 des_element = des_iterator_get_element(&des_list_it); 685 des_iterator_init(&prot_it, des_element); 686 element = des_iterator_get_element(&prot_it); 687 688 if (de_get_element_type(element) != DE_UUID) continue; 689 690 uuid = de_get_uuid32(element); 691 des_iterator_next(&prot_it); 692 switch (uuid){ 693 case BLUETOOTH_PROTOCOL_L2CAP: 694 if (!des_iterator_has_more(&prot_it)) continue; 695 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_l2cap_psm); 696 break; 697 case BLUETOOTH_PROTOCOL_AVCTP: 698 if (!des_iterator_has_more(&prot_it)) continue; 699 de_element_get_uint16(des_iterator_get_element(&prot_it), &avrcp_sdp_query_context.browsing_version); 700 break; 701 default: 702 break; 703 } 704 } 705 } 706 break; 707 default: 708 break; 709 } 710 } 711 } else { 712 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)); 713 } 714 } 715 716 static void avrcp_handle_sdp_query_failed(avrcp_connection_t * connection, uint8_t status){ 717 if (connection == NULL) return; 718 log_info("AVRCP: SDP query failed with status 0x%02x.", status); 719 avrcp_emit_connection_established(connection->avrcp_cid, connection->remote_addr, connection->con_handle, status); 720 avrcp_finalize_connection(connection); 721 } 722 723 static void avrcp_handle_sdp_query_succeeded(avrcp_connection_t * connection){ 724 if (connection == NULL) return; 725 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 726 connection->avrcp_l2cap_psm = avrcp_sdp_query_context.avrcp_l2cap_psm; 727 connection->browsing_version = avrcp_sdp_query_context.browsing_version; 728 connection->browsing_l2cap_psm = avrcp_sdp_query_context.browsing_l2cap_psm; 729 } 730 731 static void avrcp_handle_sdp_client_query_result(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 732 UNUSED(packet_type); 733 UNUSED(channel); 734 UNUSED(size); 735 736 bool state_ok = true; 737 avrcp_connection_t * avrcp_target_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_sdp_query_context.avrcp_cid); 738 if (!avrcp_target_connection || avrcp_target_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 739 state_ok = false; 740 } 741 avrcp_connection_t * avrcp_controller_connection = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_sdp_query_context.avrcp_cid); 742 if (!avrcp_controller_connection || avrcp_controller_connection->state != AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE) { 743 state_ok = false; 744 } 745 if (!state_ok){ 746 // something wrong, nevertheless, start next sdp query if this one is complete 747 if (hci_event_packet_get_type(packet) == SDP_EVENT_QUERY_COMPLETE){ 748 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 749 } 750 return; 751 } 752 753 uint8_t status; 754 755 switch (hci_event_packet_get_type(packet)){ 756 case SDP_EVENT_QUERY_ATTRIBUTE_VALUE: 757 avrcp_handle_sdp_client_query_attribute_value(packet); 758 return; 759 760 case SDP_EVENT_QUERY_COMPLETE: 761 status = sdp_event_query_complete_get_status(packet); 762 763 if (status != ERROR_CODE_SUCCESS){ 764 avrcp_handle_sdp_query_failed(avrcp_controller_connection, status); 765 avrcp_handle_sdp_query_failed(avrcp_target_connection, status); 766 break; 767 } 768 769 if (!avrcp_sdp_query_context.avrcp_l2cap_psm){ 770 avrcp_handle_sdp_query_failed(avrcp_controller_connection, SDP_SERVICE_NOT_FOUND); 771 avrcp_handle_sdp_query_failed(avrcp_target_connection, SDP_SERVICE_NOT_FOUND); 772 break; 773 } 774 775 avrcp_handle_sdp_query_succeeded(avrcp_controller_connection); 776 avrcp_handle_sdp_query_succeeded(avrcp_target_connection); 777 778 l2cap_create_channel(&avrcp_packet_handler, avrcp_target_connection->remote_addr, avrcp_sdp_query_context.avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 779 break; 780 781 default: 782 return; 783 } 784 785 // register the SDP Query request to check if there is another connection waiting for the query 786 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 787 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 788 } 789 790 791 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){ 792 if (connection == NULL){ 793 connection = avrcp_create_connection(role, event_addr); 794 } 795 if (connection) { 796 connection->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 797 connection->l2cap_signaling_cid = local_cid; 798 connection->avrcp_cid = avrcp_cid; 799 connection->con_handle = con_handle; 800 btstack_run_loop_remove_timer(&connection->retry_timer); 801 } 802 return connection; 803 } 804 805 static void avrcp_handle_open_connection(avrcp_connection_t * connection, hci_con_handle_t con_handle, uint16_t local_cid, uint16_t l2cap_mtu){ 806 connection->l2cap_signaling_cid = local_cid; 807 connection->l2cap_mtu = l2cap_mtu; 808 connection->con_handle = con_handle; 809 connection->incoming_declined = false; 810 connection->target_song_length_ms = 0xFFFFFFFF; 811 connection->target_song_position_ms = 0xFFFFFFFF; 812 memset(connection->target_track_id, 0xFF, 8); 813 connection->target_track_selected = false; 814 connection->target_track_changed = false; 815 connection->target_playback_status = AVRCP_PLAYBACK_STATUS_STOPPED; 816 connection->state = AVCTP_CONNECTION_OPENED; 817 818 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); 819 } 820 821 static void avrcp_retry_timer_timeout_handler(btstack_timer_source_t * timer){ 822 uint16_t avrcp_cid = (uint16_t)(uintptr_t) btstack_run_loop_get_timer_context(timer); 823 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 824 if (connection_controller == NULL) return; 825 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 826 if (connection_target == NULL) return; 827 828 if (connection_controller->state == AVCTP_CONNECTION_W2_L2CAP_RETRY){ 829 connection_controller->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 830 connection_target->state = AVCTP_CONNECTION_W4_L2CAP_CONNECTED; 831 l2cap_create_channel(&avrcp_packet_handler, connection_controller->remote_addr, connection_controller->avrcp_l2cap_psm, l2cap_max_mtu(), NULL); 832 } 833 } 834 835 static void avrcp_retry_timer_start(avrcp_connection_t * connection){ 836 btstack_run_loop_set_timer_handler(&connection->retry_timer, avrcp_retry_timer_timeout_handler); 837 btstack_run_loop_set_timer_context(&connection->retry_timer, (void *)(uintptr_t)connection->avrcp_cid); 838 839 // add some jitter/randomness to reconnect delay 840 uint32_t timeout = 100 + (btstack_run_loop_get_time_ms() & 0x7F); 841 btstack_run_loop_set_timer(&connection->retry_timer, timeout); 842 843 btstack_run_loop_add_timer(&connection->retry_timer); 844 } 845 846 static avrcp_frame_type_t avrcp_get_frame_type(uint8_t header){ 847 return (avrcp_frame_type_t)((header & 0x02) >> 1); 848 } 849 850 static void avrcp_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){ 851 UNUSED(channel); 852 UNUSED(size); 853 bd_addr_t event_addr; 854 uint16_t local_cid; 855 uint16_t l2cap_mtu; 856 uint8_t status; 857 bool decline_connection; 858 bool outoing_active; 859 hci_con_handle_t con_handle; 860 861 avrcp_connection_t * connection_controller; 862 avrcp_connection_t * connection_target; 863 bool can_send; 864 865 switch (packet_type) { 866 case HCI_EVENT_PACKET: 867 switch (hci_event_packet_get_type(packet)) { 868 869 case L2CAP_EVENT_INCOMING_CONNECTION: 870 btstack_assert(avrcp_controller_packet_handler != NULL); 871 btstack_assert(avrcp_target_packet_handler != NULL); 872 873 l2cap_event_incoming_connection_get_address(packet, event_addr); 874 local_cid = l2cap_event_incoming_connection_get_local_cid(packet); 875 con_handle = l2cap_event_incoming_connection_get_handle(packet); 876 877 outoing_active = false; 878 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 879 if (connection_target != NULL){ 880 if (connection_target->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED){ 881 outoing_active = true; 882 connection_target->incoming_declined = true; 883 } 884 } 885 886 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 887 if (connection_controller != NULL){ 888 if (connection_controller->state == AVCTP_CONNECTION_W4_L2CAP_CONNECTED) { 889 outoing_active = true; 890 connection_controller->incoming_declined = true; 891 } 892 } 893 894 decline_connection = outoing_active; 895 if (decline_connection == false){ 896 uint16_t avrcp_cid; 897 if ((connection_controller == NULL) || (connection_target == NULL)){ 898 avrcp_cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 899 } else { 900 avrcp_cid = connection_controller->avrcp_cid; 901 } 902 // create two connection objects (both) 903 connection_target = avrcp_handle_incoming_connection_for_role(AVRCP_TARGET, connection_target, event_addr, con_handle, local_cid, avrcp_cid); 904 connection_controller = avrcp_handle_incoming_connection_for_role(AVRCP_CONTROLLER, connection_controller, event_addr, con_handle, local_cid, avrcp_cid); 905 if ((connection_target == NULL) || (connection_controller == NULL)){ 906 decline_connection = true; 907 if (connection_target) { 908 avrcp_finalize_connection(connection_target); 909 } 910 if (connection_controller) { 911 avrcp_finalize_connection(connection_controller); 912 } 913 } 914 } 915 if (decline_connection){ 916 l2cap_decline_connection(local_cid); 917 } else { 918 log_info("AVRCP: L2CAP_EVENT_INCOMING_CONNECTION local cid 0x%02x, state %d", local_cid, connection_controller->state); 919 l2cap_accept_connection(local_cid); 920 } 921 break; 922 923 case L2CAP_EVENT_CHANNEL_OPENED: 924 l2cap_event_channel_opened_get_address(packet, event_addr); 925 status = l2cap_event_channel_opened_get_status(packet); 926 local_cid = l2cap_event_channel_opened_get_local_cid(packet); 927 l2cap_mtu = l2cap_event_channel_opened_get_remote_mtu(packet); 928 con_handle = l2cap_event_channel_opened_get_handle(packet); 929 930 connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, event_addr); 931 connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, event_addr); 932 933 // incoming: structs are already created in L2CAP_EVENT_INCOMING_CONNECTION 934 // outgoing: structs are cteated in avrcp_connect() 935 if ((connection_controller == NULL) || (connection_target == NULL)) { 936 break; 937 } 938 939 switch (status){ 940 case ERROR_CODE_SUCCESS: 941 avrcp_handle_open_connection(connection_target, con_handle, local_cid, l2cap_mtu); 942 avrcp_handle_open_connection(connection_controller, con_handle, local_cid, l2cap_mtu); 943 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 944 return; 945 case L2CAP_CONNECTION_RESPONSE_RESULT_REFUSED_RESOURCES: 946 if (connection_controller->incoming_declined == true){ 947 log_info("Incoming connection was declined, and the outgoing failed"); 948 connection_controller->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 949 connection_controller->incoming_declined = false; 950 connection_target->state = AVCTP_CONNECTION_W2_L2CAP_RETRY; 951 connection_target->incoming_declined = false; 952 avrcp_retry_timer_start(connection_controller); 953 return; 954 } 955 break; 956 default: 957 break; 958 } 959 log_info("L2CAP connection to connection %s failed. status code 0x%02x", bd_addr_to_str(event_addr), status); 960 avrcp_emit_connection_established(connection_controller->avrcp_cid, event_addr, con_handle, status); 961 avrcp_finalize_connection(connection_controller); 962 avrcp_finalize_connection(connection_target); 963 964 break; 965 966 case L2CAP_EVENT_CHANNEL_CLOSED: 967 local_cid = l2cap_event_channel_closed_get_local_cid(packet); 968 969 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 970 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 971 if ((connection_controller == NULL) || (connection_target == NULL)) { 972 break; 973 } 974 avrcp_emit_connection_closed(connection_controller->avrcp_cid); 975 avrcp_finalize_connection(connection_controller); 976 avrcp_finalize_connection(connection_target); 977 break; 978 979 case L2CAP_EVENT_CAN_SEND_NOW: 980 local_cid = l2cap_event_can_send_now_get_local_cid(packet); 981 can_send = true; 982 983 connection_target = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_TARGET, local_cid); 984 if ((connection_target != NULL) && connection_target->wait_to_send){ 985 connection_target->wait_to_send = false; 986 (*avrcp_target_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 987 can_send = false; 988 } 989 990 connection_controller = avrcp_get_connection_for_l2cap_signaling_cid_for_role(AVRCP_CONTROLLER, local_cid); 991 if ((connection_controller != NULL) && connection_controller->wait_to_send){ 992 if (can_send){ 993 connection_controller->wait_to_send = false; 994 (*avrcp_controller_packet_handler)(HCI_EVENT_PACKET, channel, packet, size); 995 } else { 996 l2cap_request_can_send_now_event(local_cid); 997 } 998 } 999 break; 1000 1001 default: 1002 break; 1003 } 1004 break; 1005 1006 case L2CAP_DATA_PACKET: 1007 switch (avrcp_get_frame_type(packet[0])){ 1008 case AVRCP_RESPONSE_FRAME: 1009 (*avrcp_controller_packet_handler)(packet_type, channel, packet, size); 1010 break; 1011 case AVRCP_COMMAND_FRAME: 1012 default: // make compiler happy 1013 (*avrcp_target_packet_handler)(packet_type, channel, packet, size); 1014 break; 1015 } 1016 break; 1017 1018 default: 1019 break; 1020 } 1021 } 1022 1023 uint8_t avrcp_disconnect(uint16_t avrcp_cid){ 1024 avrcp_connection_t * connection_controller = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, avrcp_cid); 1025 if (!connection_controller){ 1026 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1027 } 1028 avrcp_connection_t * connection_target = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, avrcp_cid); 1029 if (!connection_target){ 1030 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1031 } 1032 if (connection_controller->browsing_connection){ 1033 l2cap_disconnect(connection_controller->browsing_connection->l2cap_browsing_cid); 1034 } 1035 l2cap_disconnect(connection_controller->l2cap_signaling_cid); 1036 return ERROR_CODE_SUCCESS; 1037 } 1038 1039 static void avrcp_handle_start_sdp_client_query(void * context){ 1040 UNUSED(context); 1041 1042 btstack_linked_list_iterator_t it; 1043 btstack_linked_list_iterator_init(&it, &avrcp_connections); 1044 while (btstack_linked_list_iterator_has_next(&it)){ 1045 avrcp_connection_t * connection = (avrcp_connection_t *)btstack_linked_list_iterator_next(&it); 1046 1047 if (connection->state != AVCTP_CONNECTION_W2_SEND_SDP_QUERY) continue; 1048 connection->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1049 1050 // prevent triggering SDP query twice (for each role once) 1051 avrcp_connection_t * connection_with_opposite_role; 1052 switch (connection->role){ 1053 case AVRCP_CONTROLLER: 1054 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_TARGET, connection->avrcp_cid); 1055 break; 1056 case AVRCP_TARGET: 1057 connection_with_opposite_role = avrcp_get_connection_for_avrcp_cid_for_role(AVRCP_CONTROLLER, connection->avrcp_cid); 1058 break; 1059 default: 1060 btstack_assert(false); 1061 return; 1062 } 1063 connection_with_opposite_role->state = AVCTP_CONNECTION_W4_SDP_QUERY_COMPLETE; 1064 1065 avrcp_sdp_query_context.avrcp_l2cap_psm = 0; 1066 avrcp_sdp_query_context.avrcp_version = 0; 1067 avrcp_sdp_query_context.avrcp_cid = connection->avrcp_cid; 1068 sdp_client_query_uuid16(&avrcp_handle_sdp_client_query_result, (uint8_t *) connection->remote_addr, BLUETOOTH_PROTOCOL_AVCTP); 1069 return; 1070 } 1071 } 1072 1073 uint8_t avrcp_connect(bd_addr_t remote_addr, uint16_t * avrcp_cid){ 1074 btstack_assert(avrcp_controller_packet_handler != NULL); 1075 btstack_assert(avrcp_target_packet_handler != NULL); 1076 1077 avrcp_connection_t * connection_controller = avrcp_get_connection_for_bd_addr_for_role(AVRCP_CONTROLLER, remote_addr); 1078 if (connection_controller){ 1079 return ERROR_CODE_COMMAND_DISALLOWED; 1080 } 1081 avrcp_connection_t * connection_target = avrcp_get_connection_for_bd_addr_for_role(AVRCP_TARGET, remote_addr); 1082 if (connection_target){ 1083 return ERROR_CODE_COMMAND_DISALLOWED; 1084 } 1085 1086 uint16_t cid = avrcp_get_next_cid(AVRCP_CONTROLLER); 1087 1088 connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1089 if (!connection_controller) return BTSTACK_MEMORY_ALLOC_FAILED; 1090 1091 connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1092 if (!connection_target){ 1093 avrcp_finalize_connection(connection_controller); 1094 return BTSTACK_MEMORY_ALLOC_FAILED; 1095 } 1096 1097 if (avrcp_cid != NULL){ 1098 *avrcp_cid = cid; 1099 } 1100 1101 connection_controller->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1102 connection_controller->avrcp_cid = cid; 1103 1104 connection_target->state = AVCTP_CONNECTION_W2_SEND_SDP_QUERY; 1105 connection_target->avrcp_cid = cid; 1106 1107 avrcp_sdp_query_registration.callback = &avrcp_handle_start_sdp_client_query; 1108 // ignore ERROR_CODE_COMMAND_DISALLOWED because in that case, we already have requested an SDP callback 1109 (void) sdp_client_register_query_callback(&avrcp_sdp_query_registration); 1110 return ERROR_CODE_SUCCESS; 1111 } 1112 1113 void avrcp_init(void){ 1114 avrcp_connections = NULL; 1115 if (avrcp_l2cap_service_registered) return; 1116 1117 int status = l2cap_register_service(&avrcp_packet_handler, BLUETOOTH_PSM_AVCTP, 0xffff, gap_get_security_level()); 1118 if (status != ERROR_CODE_SUCCESS) return; 1119 avrcp_l2cap_service_registered = true; 1120 } 1121 1122 void avrcp_deinit(void){ 1123 avrcp_l2cap_service_registered = false; 1124 1125 avrcp_cid_counter = 0; 1126 avrcp_connections = NULL; 1127 1128 avrcp_callback = NULL; 1129 avrcp_controller_packet_handler = NULL; 1130 avrcp_target_packet_handler = NULL; 1131 1132 (void) memset(&avrcp_sdp_query_registration, 0, sizeof(avrcp_sdp_query_registration)); 1133 (void) memset(&avrcp_sdp_query_context, 0, sizeof(avrcp_sdp_query_context_t)); 1134 (void) memset(avrcp_sdp_query_attribute_value, 0, sizeof(avrcp_sdp_query_attribute_value)); 1135 } 1136 1137 void avrcp_register_controller_packet_handler(btstack_packet_handler_t callback){ 1138 avrcp_controller_packet_handler = callback; 1139 } 1140 1141 void avrcp_register_target_packet_handler(btstack_packet_handler_t callback){ 1142 avrcp_target_packet_handler = callback; 1143 } 1144 1145 void avrcp_register_packet_handler(btstack_packet_handler_t callback){ 1146 btstack_assert(callback != NULL); 1147 avrcp_callback = callback; 1148 } 1149 1150 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 1151 #define FUZZ_CID 0x44 1152 #define FUZZ_CON_HANDLE 0x0001 1153 static bd_addr_t remote_addr = { 0x33, 0x33, 0x33, 0x33, 0x33, 0x33 }; 1154 void avrcp_init_fuzz(void){ 1155 // setup avrcp connections for cid 1156 avrcp_connection_t * connection_controller = avrcp_create_connection(AVRCP_CONTROLLER, remote_addr); 1157 avrcp_connection_t * connection_target = avrcp_create_connection(AVRCP_TARGET, remote_addr); 1158 avrcp_handle_open_connection(connection_controller, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1159 avrcp_handle_open_connection(connection_target, FUZZ_CON_HANDLE, FUZZ_CID, 999); 1160 } 1161 void avrcp_packet_handler_fuzz(uint8_t *packet, uint16_t size){ 1162 avrcp_packet_handler(L2CAP_DATA_PACKET, FUZZ_CID, packet, size); 1163 } 1164 #endif