1 /* 2 * Copyright (C) 2014 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__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef ENABLE_BLE 57 #include "gap.h" 58 #include "ble/le_device_db.h" 59 #endif 60 61 #include <stdarg.h> 62 #include <string.h> 63 #include <inttypes.h> 64 65 #include "btstack_debug.h" 66 #include "btstack_event.h" 67 #include "btstack_linked_list.h" 68 #include "btstack_memory.h" 69 #include "bluetooth_company_id.h" 70 #include "bluetooth_data_types.h" 71 #include "gap.h" 72 #include "hci.h" 73 #include "hci_cmd.h" 74 #include "hci_dump.h" 75 #include "ad_parser.h" 76 77 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 78 #include <stdio.h> // sprintf 79 #endif 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_MIN_PERIODIC_LEN_MIN 0x02 119 #define GAP_INQUIRY_MAX_PERIODIC_LEN_MIN 0x03 120 #define GAP_INQUIRY_STATE_IDLE 0x00 121 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 122 #define GAP_INQUIRY_STATE_ACTIVE 0x81 123 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 124 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 125 #define GAP_INQUIRY_STATE_PERIODIC 0x84 126 #define GAP_INQUIRY_STATE_W2_EXIT_PERIODIC 0x85 127 128 // GAP Remote Name Request 129 #define GAP_REMOTE_NAME_STATE_IDLE 0 130 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 131 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 132 133 // GAP Pairing 134 #define GAP_PAIRING_STATE_IDLE 0 135 #define GAP_PAIRING_STATE_SEND_PIN 1 136 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 137 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 138 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 139 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 140 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 141 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 142 143 // 144 // compact storage of relevant supported HCI Commands. 145 // X-Macro below provides enumeration and mapping table into the supported 146 // commands bitmap (64 bytes) from HCI Read Local Supported Commands 147 // 148 149 // format: command name, byte offset, bit nr in 64-byte supported commands 150 // currently stored in 32-bit variable 151 #define SUPPORTED_HCI_COMMANDS \ 152 X( SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES , 2, 5) \ 153 X( SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE , 10, 4) \ 154 X( SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE , 14, 7) \ 155 X( SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING, 18, 3) \ 156 X( SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE , 20, 4) \ 157 X( SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2 , 22, 2) \ 158 X( SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED , 24, 6) \ 159 X( SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY, 32, 1) \ 160 X( SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST , 32, 3) \ 161 X( SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND , 32, 6) \ 162 X( SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH, 34, 0) \ 163 X( SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE , 35, 1) \ 164 X( SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH , 35, 3) \ 165 X( SUPPORTED_HCI_COMMAND_LE_SET_DEFAULT_PHY , 35, 5) \ 166 X( SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE , 36, 6) \ 167 X( SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2 , 41, 5) \ 168 X( SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE , 45, 7) \ 169 170 // enumerate supported commands 171 #define X(name, offset, bit) name, 172 enum { 173 SUPPORTED_HCI_COMMANDS 174 SUPPORTED_HCI_COMMANDS_COUNT 175 }; 176 #undef X 177 178 // prototypes 179 #ifdef ENABLE_CLASSIC 180 static void hci_update_scan_enable(void); 181 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable); 182 static int hci_local_ssp_activated(void); 183 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 184 static bool hci_ssp_supported(hci_connection_t * connection); 185 static void hci_notify_if_sco_can_send_now(void); 186 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 187 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 188 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 189 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 190 static void hci_connection_timestamp(hci_connection_t *connection); 191 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 192 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 193 #endif 194 195 static int hci_power_control_on(void); 196 static void hci_power_control_off(void); 197 static void hci_state_reset(void); 198 static void hci_halting_timeout_handler(btstack_timer_source_t * ds); 199 static void hci_emit_transport_packet_sent(void); 200 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 201 static void hci_emit_nr_connections_changed(void); 202 static void hci_emit_hci_open_failed(void); 203 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 204 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 205 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 206 static void hci_run(void); 207 static int hci_is_le_connection(hci_connection_t * connection); 208 209 #ifdef ENABLE_CLASSIC 210 static int hci_have_usb_transport(void); 211 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 212 #endif 213 214 #ifdef ENABLE_BLE 215 static void hci_whitelist_free(void); 216 #ifdef ENABLE_LE_CENTRAL 217 // called from test/ble_client/advertising_data_parser.c 218 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 219 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 220 static hci_connection_t * gap_get_outgoing_connection(void); 221 static void hci_le_scan_stop(void); 222 static bool hci_run_general_gap_le(void); 223 #endif 224 #ifdef ENABLE_LE_PERIPHERAL 225 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 226 static void hci_periodic_advertiser_list_free(void); 227 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle); 228 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 229 #endif /* ENABLE_LE_PERIPHERAL */ 230 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 231 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id); 232 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream); 233 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id); 234 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle); 235 static void hci_iso_stream_requested_finalize(uint8_t big_handle); 236 static void hci_iso_stream_requested_confirm(uint8_t big_handle); 237 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size); 238 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle); 239 static void hci_iso_notify_can_send_now(void); 240 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status); 241 static void hci_emit_big_terminated(const le_audio_big_t * big); 242 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status); 243 static void hci_emit_big_sync_stopped(uint8_t big_handle); 244 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle); 245 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 246 #endif /* ENABLE_BLE */ 247 248 // the STACK is here 249 #ifndef HAVE_MALLOC 250 static hci_stack_t hci_stack_static; 251 #endif 252 static hci_stack_t * hci_stack = NULL; 253 254 #ifdef ENABLE_CLASSIC 255 // default name 256 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 257 258 // test helper 259 static uint8_t disable_l2cap_timeouts = 0; 260 #endif 261 262 // reset connection state on create and on reconnect 263 // don't overwrite addr, con handle, role 264 static void hci_connection_init(hci_connection_t * conn){ 265 conn->authentication_flags = AUTH_FLAG_NONE; 266 conn->bonding_flags = 0; 267 conn->requested_security_level = LEVEL_0; 268 #ifdef ENABLE_CLASSIC 269 conn->request_role = HCI_ROLE_INVALID; 270 conn->sniff_subrating_max_latency = 0xffff; 271 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 272 conn->link_key_type = INVALID_LINK_KEY; 273 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 274 btstack_run_loop_set_timer_context(&conn->timeout, conn); 275 hci_connection_timestamp(conn); 276 #endif 277 conn->acl_recombination_length = 0; 278 conn->acl_recombination_pos = 0; 279 conn->num_packets_sent = 0; 280 281 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 282 #ifdef ENABLE_BLE 283 conn->le_phy_update_all_phys = 0xff; 284 #endif 285 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 286 conn->le_max_tx_octets = 27; 287 #endif 288 #ifdef ENABLE_CLASSIC_PAIRING_OOB 289 conn->classic_oob_c_192 = NULL; 290 conn->classic_oob_r_192 = NULL; 291 conn->classic_oob_c_256 = NULL; 292 conn->classic_oob_r_256 = NULL; 293 #endif 294 } 295 296 /** 297 * create connection for given address 298 * 299 * @return connection OR NULL, if no memory left 300 */ 301 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 302 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 303 304 hci_connection_t * conn = btstack_memory_hci_connection_get(); 305 if (!conn) return NULL; 306 hci_connection_init(conn); 307 308 bd_addr_copy(conn->address, addr); 309 conn->address_type = addr_type; 310 conn->con_handle = HCI_CON_HANDLE_INVALID; 311 conn->role = HCI_ROLE_INVALID; 312 313 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 314 315 return conn; 316 } 317 318 319 /** 320 * get le connection parameter range 321 * 322 * @return le connection parameter range struct 323 */ 324 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 325 *range = hci_stack->le_connection_parameter_range; 326 } 327 328 /** 329 * set le connection parameter range 330 * 331 */ 332 333 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 334 hci_stack->le_connection_parameter_range = *range; 335 } 336 337 /** 338 * @brief Test if connection parameters are inside in existing rage 339 * @param conn_interval_min (unit: 1.25ms) 340 * @param conn_interval_max (unit: 1.25ms) 341 * @param conn_latency 342 * @param supervision_timeout (unit: 10ms) 343 * @return 1 if included 344 */ 345 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 346 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 347 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 348 349 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 350 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 351 352 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 353 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 354 355 return 1; 356 } 357 358 /** 359 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 360 * @note: default: 1 361 * @param max_peripheral_connections 362 */ 363 #ifdef ENABLE_LE_PERIPHERAL 364 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 365 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 366 } 367 #endif 368 369 /** 370 * get hci connections iterator 371 * 372 * @return hci connections iterator 373 */ 374 375 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 376 btstack_linked_list_iterator_init(it, &hci_stack->connections); 377 } 378 379 /** 380 * get connection for a given handle 381 * 382 * @return connection OR NULL, if not found 383 */ 384 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 385 btstack_linked_list_iterator_t it; 386 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 387 while (btstack_linked_list_iterator_has_next(&it)){ 388 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 389 if ( item->con_handle == con_handle ) { 390 return item; 391 } 392 } 393 return NULL; 394 } 395 396 /** 397 * get connection for given address 398 * 399 * @return connection OR NULL, if not found 400 */ 401 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 402 btstack_linked_list_iterator_t it; 403 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 404 while (btstack_linked_list_iterator_has_next(&it)){ 405 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 406 if (connection->address_type != addr_type) continue; 407 if (memcmp(addr, connection->address, 6) != 0) continue; 408 return connection; 409 } 410 return NULL; 411 } 412 413 #ifdef ENABLE_CLASSIC 414 415 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 416 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 417 } 418 419 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 420 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 421 } 422 423 #ifdef ENABLE_SCO_OVER_HCI 424 static int hci_number_sco_connections(void){ 425 int connections = 0; 426 btstack_linked_list_iterator_t it; 427 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 428 while (btstack_linked_list_iterator_has_next(&it)){ 429 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 430 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 431 connections++; 432 } 433 return connections; 434 } 435 #endif 436 437 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 438 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 439 #ifdef HAVE_EMBEDDED_TICK 440 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 441 // connections might be timed out 442 hci_emit_l2cap_check_timeout(connection); 443 } 444 #else 445 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 446 // connections might be timed out 447 hci_emit_l2cap_check_timeout(connection); 448 } 449 #endif 450 } 451 452 static void hci_connection_timestamp(hci_connection_t *connection){ 453 #ifdef HAVE_EMBEDDED_TICK 454 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 455 #else 456 connection->timestamp = btstack_run_loop_get_time_ms(); 457 #endif 458 } 459 460 /** 461 * add authentication flags and reset timer 462 * @note: assumes classic connection 463 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 464 */ 465 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 466 bd_addr_t addr; 467 reverse_bd_addr(bd_addr, addr); 468 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 469 if (conn) { 470 connectionSetAuthenticationFlags(conn, flags); 471 hci_connection_timestamp(conn); 472 } 473 } 474 475 static bool hci_pairing_active(hci_connection_t * hci_connection){ 476 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 477 } 478 479 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 480 if (hci_pairing_active(hci_connection)) return; 481 if (ssp){ 482 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 483 } else { 484 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 485 } 486 // if we are initiator, we have sent an HCI Authenticate Request 487 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 488 489 // if we are responder, use minimal service security level as required level 490 if (!initiator){ 491 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 492 } 493 494 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 495 496 uint8_t event[12]; 497 event[0] = GAP_EVENT_PAIRING_STARTED; 498 event[1] = 10; 499 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 500 reverse_bd_addr(hci_connection->address, &event[4]); 501 event[10] = (uint8_t) ssp; 502 event[11] = (uint8_t) initiator; 503 hci_emit_event(event, sizeof(event), 1); 504 } 505 506 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 507 hci_connection->requested_security_level = LEVEL_0; 508 if (!hci_pairing_active(hci_connection)) return; 509 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 510 #ifdef ENABLE_CLASSIC_PAIRING_OOB 511 hci_connection->classic_oob_c_192 = NULL; 512 hci_connection->classic_oob_r_192 = NULL; 513 hci_connection->classic_oob_c_256 = NULL; 514 hci_connection->classic_oob_r_256 = NULL; 515 #endif 516 log_info("pairing complete, status %02x", status); 517 518 uint8_t event[11]; 519 event[0] = GAP_EVENT_PAIRING_COMPLETE; 520 event[1] = 9; 521 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 522 reverse_bd_addr(hci_connection->address, &event[4]); 523 event[10] = status; 524 hci_emit_event(event, sizeof(event), 1); 525 526 // emit dedicated bonding done on failure, otherwise verify that connection can be encrypted 527 if ((status != ERROR_CODE_SUCCESS) && ((hci_connection->bonding_flags & BONDING_DEDICATED) != 0)){ 528 hci_connection->bonding_flags &= ~BONDING_DEDICATED; 529 hci_connection->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 530 hci_connection->bonding_status = status; 531 } 532 } 533 534 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 535 hci_connection_t * conn = hci_connection_for_handle(handle); 536 if (!conn) return false; 537 return hci_pairing_active(conn); 538 } 539 540 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 541 if (!hci_stack->link_key_db) return; 542 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 543 hci_stack->link_key_db->delete_link_key(addr); 544 } 545 546 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 547 if (!hci_stack->link_key_db) return; 548 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 549 hci_stack->link_key_db->put_link_key(addr, link_key, type); 550 } 551 552 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 553 if (!hci_stack->link_key_db) return false; 554 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 555 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 556 return result; 557 } 558 559 void gap_delete_all_link_keys(void){ 560 bd_addr_t addr; 561 link_key_t link_key; 562 link_key_type_t type; 563 btstack_link_key_iterator_t it; 564 int ok = gap_link_key_iterator_init(&it); 565 if (!ok) { 566 log_error("could not initialize iterator"); 567 return; 568 } 569 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 570 gap_drop_link_key_for_bd_addr(addr); 571 } 572 gap_link_key_iterator_done(&it); 573 } 574 575 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 576 if (!hci_stack->link_key_db) return 0; 577 if (!hci_stack->link_key_db->iterator_init) return 0; 578 return hci_stack->link_key_db->iterator_init(it); 579 } 580 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 581 if (!hci_stack->link_key_db) return 0; 582 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 583 } 584 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 585 if (!hci_stack->link_key_db) return; 586 hci_stack->link_key_db->iterator_done(it); 587 } 588 #endif 589 590 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 591 switch (address_type){ 592 case BD_ADDR_TYPE_LE_PUBLIC: 593 case BD_ADDR_TYPE_LE_RANDOM: 594 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 595 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 596 return true; 597 default: 598 return false; 599 } 600 } 601 602 static int hci_is_le_connection(hci_connection_t * connection){ 603 return hci_is_le_connection_type(connection->address_type); 604 } 605 606 /** 607 * count connections 608 */ 609 static int nr_hci_connections(void){ 610 int count = 0; 611 btstack_linked_item_t *it; 612 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 613 count++; 614 } 615 return count; 616 } 617 618 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 619 620 unsigned int num_packets_sent_classic = 0; 621 unsigned int num_packets_sent_le = 0; 622 623 btstack_linked_item_t *it; 624 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 625 hci_connection_t * connection = (hci_connection_t *) it; 626 if (hci_is_le_connection(connection)){ 627 num_packets_sent_le += connection->num_packets_sent; 628 } 629 if (connection->address_type == BD_ADDR_TYPE_ACL){ 630 num_packets_sent_classic += connection->num_packets_sent; 631 } 632 } 633 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 634 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 635 int free_slots_le = 0; 636 637 if (free_slots_classic < 0){ 638 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 639 return 0; 640 } 641 642 if (hci_stack->le_acl_packets_total_num){ 643 // if we have LE slots, they are used 644 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 645 if (free_slots_le < 0){ 646 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 647 return 0; 648 } 649 } else { 650 // otherwise, classic slots are used for LE, too 651 free_slots_classic -= num_packets_sent_le; 652 if (free_slots_classic < 0){ 653 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 654 return 0; 655 } 656 } 657 658 switch (address_type){ 659 case BD_ADDR_TYPE_UNKNOWN: 660 log_error("hci_number_free_acl_slots: unknown address type"); 661 return 0; 662 663 case BD_ADDR_TYPE_ACL: 664 return (uint16_t) free_slots_classic; 665 666 default: 667 if (hci_stack->le_acl_packets_total_num > 0){ 668 return (uint16_t) free_slots_le; 669 } 670 return (uint16_t) free_slots_classic; 671 } 672 } 673 674 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 675 // get connection type 676 hci_connection_t * connection = hci_connection_for_handle(con_handle); 677 if (!connection){ 678 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 679 return 0; 680 } 681 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 682 } 683 684 #ifdef ENABLE_CLASSIC 685 static int hci_number_free_sco_slots(void){ 686 unsigned int num_sco_packets_sent = 0; 687 btstack_linked_item_t *it; 688 if (hci_stack->synchronous_flow_control_enabled){ 689 // explicit flow control 690 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 691 hci_connection_t * connection = (hci_connection_t *) it; 692 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 693 num_sco_packets_sent += connection->num_packets_sent; 694 } 695 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 696 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 697 return 0; 698 } 699 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 700 } else { 701 // implicit flow control -- TODO 702 int num_ready = 0; 703 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 704 hci_connection_t * connection = (hci_connection_t *) it; 705 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 706 if (connection->sco_tx_ready == 0) continue; 707 num_ready++; 708 } 709 return num_ready; 710 } 711 } 712 #endif 713 714 // only used to send HCI Host Number Completed Packets 715 static int hci_can_send_comand_packet_transport(void){ 716 if (hci_stack->hci_packet_buffer_reserved) return 0; 717 718 // check for async hci transport implementations 719 if (hci_stack->hci_transport->can_send_packet_now){ 720 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 721 return 0; 722 } 723 } 724 return 1; 725 } 726 727 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 728 bool hci_can_send_command_packet_now(void){ 729 if (hci_can_send_comand_packet_transport() == 0) return false; 730 return hci_stack->num_cmd_packets > 0u; 731 } 732 733 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 734 // check for async hci transport implementations 735 if (!hci_stack->hci_transport->can_send_packet_now) return true; 736 return hci_stack->hci_transport->can_send_packet_now(packet_type); 737 } 738 739 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 740 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 741 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 742 } 743 744 bool hci_can_send_acl_le_packet_now(void){ 745 if (hci_stack->hci_packet_buffer_reserved) return false; 746 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 747 } 748 749 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 750 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 751 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 752 } 753 754 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 755 if (hci_stack->hci_packet_buffer_reserved) return false; 756 return hci_can_send_prepared_acl_packet_now(con_handle); 757 } 758 759 #ifdef ENABLE_CLASSIC 760 bool hci_can_send_acl_classic_packet_now(void){ 761 if (hci_stack->hci_packet_buffer_reserved) return false; 762 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 763 } 764 765 bool hci_can_send_prepared_sco_packet_now(void){ 766 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 767 if (hci_have_usb_transport()){ 768 return hci_stack->sco_can_send_now; 769 } else { 770 return hci_number_free_sco_slots() > 0; 771 } 772 } 773 774 bool hci_can_send_sco_packet_now(void){ 775 if (hci_stack->hci_packet_buffer_reserved) return false; 776 return hci_can_send_prepared_sco_packet_now(); 777 } 778 779 void hci_request_sco_can_send_now_event(void){ 780 hci_stack->sco_waiting_for_can_send_now = 1; 781 hci_notify_if_sco_can_send_now(); 782 } 783 #endif 784 785 // used for internal checks in l2cap.c 786 bool hci_is_packet_buffer_reserved(void){ 787 return hci_stack->hci_packet_buffer_reserved; 788 } 789 790 // reserves outgoing packet buffer. 791 // @return 1 if successful 792 bool hci_reserve_packet_buffer(void){ 793 if (hci_stack->hci_packet_buffer_reserved) { 794 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 795 return false; 796 } 797 hci_stack->hci_packet_buffer_reserved = true; 798 return true; 799 } 800 801 void hci_release_packet_buffer(void){ 802 hci_stack->hci_packet_buffer_reserved = false; 803 } 804 805 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 806 static int hci_transport_synchronous(void){ 807 return hci_stack->hci_transport->can_send_packet_now == NULL; 808 } 809 810 // used for debugging 811 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 812 static void hci_controller_dump_packets(void){ 813 // format: "{handle:04x}:{count:02d} " 814 char summaries[3][7 * 8 + 1]; 815 uint16_t totals[3]; 816 uint8_t index; 817 for (index = 0 ; index < 3 ; index++){ 818 summaries[index][0] = 0; 819 totals[index] = 0; 820 } 821 btstack_linked_item_t *it; 822 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 823 hci_connection_t * connection = (hci_connection_t *) it; 824 switch (connection->address_type){ 825 case BD_ADDR_TYPE_ACL: 826 index = 0; 827 break; 828 case BD_ADDR_TYPE_SCO: 829 index = 2; 830 break; 831 default: 832 index = 1; 833 break; 834 } 835 totals[index] += connection->num_packets_sent; 836 char item_text[10]; 837 sprintf(item_text, "%04x:%02d ", connection->con_handle,connection->num_packets_sent); 838 btstack_strcat(summaries[index], sizeof(summaries[0]), item_text); 839 } 840 for (index = 0 ; index < 3 ; index++){ 841 if (summaries[index][0] == 0){ 842 summaries[index][0] = '-'; 843 summaries[index][1] = 0; 844 } 845 } 846 log_info("Controller ACL BR/EDR: %s total %u / LE: %s total %u / SCO: %s total %u", summaries[0], totals[0], summaries[1], totals[1], summaries[2], totals[2]); 847 } 848 #endif 849 850 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 851 852 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 853 854 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 855 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 856 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 857 max_acl_data_packet_length = hci_stack->le_data_packets_length; 858 } 859 860 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 861 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 862 max_acl_data_packet_length = connection->le_max_tx_octets; 863 } 864 #endif 865 866 log_debug("hci_send_acl_packet_fragments entered"); 867 868 uint8_t status = ERROR_CODE_SUCCESS; 869 // multiple packets could be send on a synchronous HCI transport 870 while (true){ 871 872 log_debug("hci_send_acl_packet_fragments loop entered"); 873 874 // get current data 875 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 876 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 877 bool more_fragments = false; 878 879 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 880 if (current_acl_data_packet_length > max_acl_data_packet_length){ 881 more_fragments = true; 882 current_acl_data_packet_length = max_acl_data_packet_length; 883 } 884 885 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 886 if (acl_header_pos > 0u){ 887 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 888 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 889 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 890 } 891 892 // update header len 893 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 894 895 // count packet 896 connection->num_packets_sent++; 897 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 898 899 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 900 if (more_fragments){ 901 // update start of next fragment to send 902 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 903 } else { 904 // done 905 hci_stack->acl_fragmentation_pos = 0; 906 hci_stack->acl_fragmentation_total_size = 0; 907 } 908 909 // send packet 910 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 911 const int size = current_acl_data_packet_length + 4; 912 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 913 hci_stack->acl_fragmentation_tx_active = 1; 914 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 915 if (err != 0){ 916 // no error from HCI Transport expected 917 status = ERROR_CODE_HARDWARE_FAILURE; 918 } 919 920 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 921 hci_controller_dump_packets(); 922 #endif 923 924 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 925 926 // done yet? 927 if (!more_fragments) break; 928 929 // can send more? 930 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 931 } 932 933 log_debug("hci_send_acl_packet_fragments loop over"); 934 935 // release buffer now for synchronous transport 936 if (hci_transport_synchronous()){ 937 hci_stack->acl_fragmentation_tx_active = 0; 938 hci_release_packet_buffer(); 939 hci_emit_transport_packet_sent(); 940 } 941 942 return status; 943 } 944 945 // pre: caller has reserved the packet buffer 946 uint8_t hci_send_acl_packet_buffer(int size){ 947 btstack_assert(hci_stack->hci_packet_buffer_reserved); 948 949 uint8_t * packet = hci_stack->hci_packet_buffer; 950 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 951 952 // check for free places on Bluetooth module 953 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 954 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 955 hci_release_packet_buffer(); 956 hci_emit_transport_packet_sent(); 957 return BTSTACK_ACL_BUFFERS_FULL; 958 } 959 960 hci_connection_t *connection = hci_connection_for_handle( con_handle); 961 if (!connection) { 962 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 963 hci_release_packet_buffer(); 964 hci_emit_transport_packet_sent(); 965 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 966 } 967 968 #ifdef ENABLE_CLASSIC 969 hci_connection_timestamp(connection); 970 #endif 971 972 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 973 974 // setup data 975 hci_stack->acl_fragmentation_total_size = size; 976 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 977 978 return hci_send_acl_packet_fragments(connection); 979 } 980 981 #ifdef ENABLE_CLASSIC 982 // pre: caller has reserved the packet buffer 983 uint8_t hci_send_sco_packet_buffer(int size){ 984 btstack_assert(hci_stack->hci_packet_buffer_reserved); 985 986 uint8_t * packet = hci_stack->hci_packet_buffer; 987 988 // skip checks in loopback mode 989 if (!hci_stack->loopback_mode){ 990 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 991 992 // check for free places on Bluetooth module 993 if (!hci_can_send_prepared_sco_packet_now()) { 994 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 995 hci_release_packet_buffer(); 996 hci_emit_transport_packet_sent(); 997 return BTSTACK_ACL_BUFFERS_FULL; 998 } 999 1000 // track send packet in connection struct 1001 hci_connection_t *connection = hci_connection_for_handle( con_handle); 1002 if (!connection) { 1003 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 1004 hci_release_packet_buffer(); 1005 hci_emit_transport_packet_sent(); 1006 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1007 } 1008 1009 if (hci_have_usb_transport()){ 1010 // token used 1011 hci_stack->sco_can_send_now = false; 1012 } else { 1013 if (hci_stack->synchronous_flow_control_enabled){ 1014 connection->num_packets_sent++; 1015 } else { 1016 connection->sco_tx_ready--; 1017 } 1018 } 1019 } 1020 1021 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 1022 1023 #ifdef HAVE_SCO_TRANSPORT 1024 hci_stack->sco_transport->send_packet(packet, size); 1025 hci_release_packet_buffer(); 1026 hci_emit_transport_packet_sent(); 1027 1028 return 0; 1029 #else 1030 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 1031 if (hci_transport_synchronous()){ 1032 hci_release_packet_buffer(); 1033 hci_emit_transport_packet_sent(); 1034 } 1035 1036 if (err != 0){ 1037 return ERROR_CODE_HARDWARE_FAILURE; 1038 } 1039 return ERROR_CODE_SUCCESS; 1040 #endif 1041 } 1042 #endif 1043 1044 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 1045 static uint8_t hci_send_iso_packet_fragments(void){ 1046 1047 uint16_t max_iso_data_packet_length = hci_stack->le_iso_packets_length; 1048 uint8_t status = ERROR_CODE_SUCCESS; 1049 // multiple packets could be send on a synchronous HCI transport 1050 while (true){ 1051 1052 // get current data 1053 const uint16_t iso_header_pos = hci_stack->iso_fragmentation_pos - 4u; 1054 int current_iso_data_packet_length = hci_stack->iso_fragmentation_total_size - hci_stack->iso_fragmentation_pos; 1055 bool more_fragments = false; 1056 1057 // if ISO packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 1058 if (current_iso_data_packet_length > max_iso_data_packet_length){ 1059 more_fragments = true; 1060 current_iso_data_packet_length = max_iso_data_packet_length; 1061 } 1062 1063 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 1064 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1065 uint8_t pb_flags; 1066 if (iso_header_pos == 0u){ 1067 // first fragment, keep TS field 1068 pb_flags = more_fragments ? 0x00 : 0x02; 1069 handle_and_flags = (handle_and_flags & 0x4fffu) | (pb_flags << 12u); 1070 } else { 1071 // later fragment, drop TS field 1072 pb_flags = more_fragments ? 0x01 : 0x03; 1073 handle_and_flags = (handle_and_flags & 0x0fffu) | (pb_flags << 12u); 1074 } 1075 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos, handle_and_flags); 1076 1077 // update header len 1078 little_endian_store_16(hci_stack->hci_packet_buffer, iso_header_pos + 2u, current_iso_data_packet_length); 1079 1080 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 1081 if (more_fragments){ 1082 // update start of next fragment to send 1083 hci_stack->iso_fragmentation_pos += current_iso_data_packet_length; 1084 } else { 1085 // done 1086 hci_stack->iso_fragmentation_pos = 0; 1087 hci_stack->iso_fragmentation_total_size = 0; 1088 } 1089 1090 // send packet 1091 uint8_t * packet = &hci_stack->hci_packet_buffer[iso_header_pos]; 1092 const int size = current_iso_data_packet_length + 4; 1093 hci_dump_packet(HCI_ISO_DATA_PACKET, 0, packet, size); 1094 hci_stack->iso_fragmentation_tx_active = true; 1095 int err = hci_stack->hci_transport->send_packet(HCI_ISO_DATA_PACKET, packet, size); 1096 if (err != 0){ 1097 // no error from HCI Transport expected 1098 status = ERROR_CODE_HARDWARE_FAILURE; 1099 } 1100 1101 // done yet? 1102 if (!more_fragments) break; 1103 1104 // can send more? 1105 if (!hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)) return false; 1106 } 1107 1108 // release buffer now for synchronous transport 1109 if (hci_transport_synchronous()){ 1110 hci_stack->iso_fragmentation_tx_active = false; 1111 hci_release_packet_buffer(); 1112 hci_emit_transport_packet_sent(); 1113 } 1114 1115 return status; 1116 } 1117 1118 uint8_t hci_send_iso_packet_buffer(uint16_t size){ 1119 btstack_assert(hci_stack->hci_packet_buffer_reserved); 1120 1121 hci_con_handle_t con_handle = (hci_con_handle_t) little_endian_read_16(hci_stack->hci_packet_buffer, 0) & 0xfff; 1122 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(con_handle); 1123 if (iso_stream == NULL){ 1124 hci_release_packet_buffer(); 1125 hci_iso_notify_can_send_now(); 1126 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 1127 } 1128 1129 // TODO: check for space on controller 1130 1131 // skip iso packets if needed 1132 if (iso_stream->num_packets_to_skip > 0){ 1133 iso_stream->num_packets_to_skip--; 1134 // pretend it was processed and trigger next one 1135 hci_release_packet_buffer(); 1136 hci_iso_notify_can_send_now(); 1137 return ERROR_CODE_SUCCESS; 1138 } 1139 1140 // track outgoing packet sent 1141 log_info("Outgoing ISO packet for con handle 0x%04x", con_handle); 1142 iso_stream->num_packets_sent++; 1143 1144 // setup data 1145 hci_stack->iso_fragmentation_total_size = size; 1146 hci_stack->iso_fragmentation_pos = 4; // start of L2CAP packet 1147 1148 return hci_send_iso_packet_fragments(); 1149 } 1150 #endif 1151 1152 static void acl_handler(uint8_t *packet, uint16_t size){ 1153 1154 // get info 1155 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 1156 hci_connection_t *conn = hci_connection_for_handle(con_handle); 1157 uint8_t acl_flags = READ_ACL_FLAGS(packet); 1158 uint16_t acl_length = READ_ACL_LENGTH(packet); 1159 1160 // ignore non-registered handle 1161 if (!conn){ 1162 log_error("acl_handler called with non-registered handle %u!" , con_handle); 1163 return; 1164 } 1165 1166 // assert packet is complete 1167 if ((acl_length + 4u) != size){ 1168 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 1169 return; 1170 } 1171 1172 #ifdef ENABLE_CLASSIC 1173 // update idle timestamp 1174 hci_connection_timestamp(conn); 1175 #endif 1176 1177 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1178 hci_stack->host_completed_packets = 1; 1179 conn->num_packets_completed++; 1180 #endif 1181 1182 // handle different packet types 1183 switch (acl_flags & 0x03u) { 1184 1185 case 0x01: // continuation fragment 1186 1187 // sanity checks 1188 if (conn->acl_recombination_pos == 0u) { 1189 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 1190 return; 1191 } 1192 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 1193 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 1194 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1195 conn->acl_recombination_pos = 0; 1196 return; 1197 } 1198 1199 // append fragment payload (header already stored) 1200 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 1201 &packet[4], acl_length); 1202 conn->acl_recombination_pos += acl_length; 1203 1204 // forward complete L2CAP packet if complete. 1205 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 1206 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 1207 // reset recombination buffer 1208 conn->acl_recombination_length = 0; 1209 conn->acl_recombination_pos = 0; 1210 } 1211 break; 1212 1213 case 0x02: { // first fragment 1214 1215 // sanity check 1216 if (conn->acl_recombination_pos) { 1217 // we just received the first fragment, but still have data. Only warn if the packet wasn't a flushable packet 1218 if ((conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE+1] >> 4) != 0x02){ 1219 log_error( "ACL First Fragment but %u bytes in buffer for handle 0x%02x, dropping stale fragments", conn->acl_recombination_pos, con_handle); 1220 } 1221 conn->acl_recombination_pos = 0; 1222 } 1223 1224 // peek into L2CAP packet! 1225 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 1226 1227 // compare fragment size to L2CAP packet size 1228 if (acl_length >= (l2cap_length + 4u)){ 1229 // forward fragment as L2CAP packet 1230 hci_emit_acl_packet(packet, acl_length + 4u); 1231 } else { 1232 1233 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1234 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1235 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1236 return; 1237 } 1238 1239 // store first fragment and tweak acl length for complete package 1240 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1241 packet, acl_length + 4u); 1242 conn->acl_recombination_pos = acl_length + 4u; 1243 conn->acl_recombination_length = l2cap_length; 1244 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1245 } 1246 break; 1247 1248 } 1249 default: 1250 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1251 return; 1252 } 1253 1254 // execute main loop 1255 hci_run(); 1256 } 1257 1258 static void hci_connection_stop_timer(hci_connection_t * conn){ 1259 btstack_run_loop_remove_timer(&conn->timeout); 1260 #ifdef ENABLE_CLASSIC 1261 btstack_run_loop_remove_timer(&conn->timeout_sco); 1262 #endif 1263 } 1264 1265 static void hci_shutdown_connection(hci_connection_t *conn){ 1266 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1267 1268 #ifdef ENABLE_CLASSIC 1269 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1270 bd_addr_type_t addr_type = conn->address_type; 1271 #endif 1272 #ifdef HAVE_SCO_TRANSPORT 1273 hci_con_handle_t con_handle = conn->con_handle; 1274 #endif 1275 #endif 1276 1277 hci_connection_stop_timer(conn); 1278 1279 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1280 btstack_memory_hci_connection_free( conn ); 1281 1282 // now it's gone 1283 hci_emit_nr_connections_changed(); 1284 1285 #ifdef ENABLE_CLASSIC 1286 #ifdef ENABLE_SCO_OVER_HCI 1287 // update SCO 1288 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1289 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1290 } 1291 #endif 1292 #ifdef HAVE_SCO_TRANSPORT 1293 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1294 hci_stack->sco_transport->close(con_handle); 1295 } 1296 #endif 1297 #endif 1298 } 1299 1300 #ifdef ENABLE_CLASSIC 1301 1302 static const uint16_t packet_type_sizes[] = { 1303 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1304 HCI_ACL_DH1_SIZE, 0, 0, 0, 1305 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1306 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1307 }; 1308 static const uint8_t packet_type_feature_requirement_bit[] = { 1309 0, // 3 slot packets 1310 1, // 5 slot packets 1311 25, // EDR 2 mpbs 1312 26, // EDR 3 mbps 1313 39, // 3 slot EDR packts 1314 40, // 5 slot EDR packet 1315 }; 1316 static const uint16_t packet_type_feature_packet_mask[] = { 1317 0x0f00, // 3 slot packets 1318 0xf000, // 5 slot packets 1319 0x1102, // EDR 2 mpbs 1320 0x2204, // EDR 3 mbps 1321 0x0300, // 3 slot EDR packts 1322 0x3000, // 5 slot EDR packet 1323 }; 1324 1325 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1326 // enable packet types based on size 1327 uint16_t packet_types = 0; 1328 unsigned int i; 1329 for (i=0;i<16;i++){ 1330 if (packet_type_sizes[i] == 0) continue; 1331 if (packet_type_sizes[i] <= buffer_size){ 1332 packet_types |= 1 << i; 1333 } 1334 } 1335 // disable packet types due to missing local supported features 1336 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1337 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1338 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1339 if (feature_set) continue; 1340 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1341 packet_types &= ~packet_type_feature_packet_mask[i]; 1342 } 1343 // flip bits for "may not be used" 1344 packet_types ^= 0x3306; 1345 return packet_types; 1346 } 1347 1348 uint16_t hci_usable_acl_packet_types(void){ 1349 return hci_stack->packet_types; 1350 } 1351 #endif 1352 1353 uint8_t* hci_get_outgoing_packet_buffer(void){ 1354 // hci packet buffer is >= acl data packet length 1355 return hci_stack->hci_packet_buffer; 1356 } 1357 1358 uint16_t hci_max_acl_data_packet_length(void){ 1359 return hci_stack->acl_data_packet_length; 1360 } 1361 1362 #ifdef ENABLE_CLASSIC 1363 bool hci_extended_sco_link_supported(void){ 1364 // No. 31, byte 3, bit 7 1365 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1366 } 1367 #endif 1368 1369 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1370 // No. 54, byte 6, bit 6 1371 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1372 } 1373 1374 #ifdef ENABLE_CLASSIC 1375 static int gap_ssp_supported(void){ 1376 // No. 51, byte 6, bit 3 1377 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1378 } 1379 #endif 1380 1381 static int hci_classic_supported(void){ 1382 #ifdef ENABLE_CLASSIC 1383 // No. 37, byte 4, bit 5, = No BR/EDR Support 1384 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1385 #else 1386 return 0; 1387 #endif 1388 } 1389 1390 static int hci_le_supported(void){ 1391 #ifdef ENABLE_BLE 1392 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1393 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1394 #else 1395 return 0; 1396 #endif 1397 } 1398 1399 static bool hci_command_supported(uint8_t command_index){ 1400 return (hci_stack->local_supported_commands & (1LU << command_index)) != 0; 1401 } 1402 1403 #ifdef ENABLE_BLE 1404 1405 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1406 static bool hci_extended_advertising_supported(void){ 1407 return hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_EXTENDED_ADVERTISING_ENABLE); 1408 } 1409 #endif 1410 1411 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1412 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1413 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1414 } else { 1415 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1416 } 1417 } 1418 1419 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1420 *addr_type = hci_stack->le_own_addr_type; 1421 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1422 } 1423 1424 #ifdef ENABLE_LE_PERIPHERAL 1425 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1426 *addr_type = hci_stack->le_advertisements_own_addr_type; 1427 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1428 }; 1429 #endif 1430 1431 #ifdef ENABLE_LE_CENTRAL 1432 1433 /** 1434 * @brief Get own addr type and address used for LE connections (Central) 1435 */ 1436 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1437 *addr_type = hci_stack->le_connection_own_addr_type; 1438 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1439 } 1440 1441 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1442 1443 uint16_t offset = 3; 1444 uint8_t num_reports = packet[offset]; 1445 offset += 1; 1446 1447 uint16_t i; 1448 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1449 for (i=0; (i<num_reports) && (offset < size);i++){ 1450 // sanity checks on data_length: 1451 uint8_t data_length = packet[offset + 8]; 1452 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1453 if ((offset + 9u + data_length + 1u) > size) return; 1454 // setup event 1455 uint8_t event_size = 10u + data_length; 1456 uint16_t pos = 0; 1457 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1458 event[pos++] = event_size; 1459 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1460 offset += 8; 1461 pos += 8; 1462 event[pos++] = packet[offset + 1 + data_length]; // rssi 1463 event[pos++] = data_length; 1464 offset++; 1465 (void)memcpy(&event[pos], &packet[offset], data_length); 1466 pos += data_length; 1467 offset += data_length + 1u; // rssi 1468 hci_emit_event(event, pos, 1); 1469 } 1470 } 1471 1472 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 1473 void le_handle_extended_advertisement_report(uint8_t *packet, uint16_t size) { 1474 uint16_t offset = 3; 1475 uint8_t num_reports = packet[offset++]; 1476 uint8_t event[2 + 255]; // use upper bound to avoid var size automatic var 1477 uint8_t i; 1478 for (i=0; (i<num_reports) && (offset < size);i++){ 1479 // sanity checks on data_length: 1480 uint16_t data_length = packet[offset + 23]; 1481 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1482 if ((offset + 24u + data_length) > size) return; 1483 uint16_t event_type = little_endian_read_16(packet, offset); 1484 offset += 2; 1485 if ((event_type & 0x10) != 0) { 1486 // setup legacy event 1487 uint8_t legacy_event_type; 1488 switch (event_type){ 1489 case 0b0010011: 1490 // ADV_IND 1491 legacy_event_type = 0; 1492 break; 1493 case 0b0010101: 1494 // ADV_DIRECT_IND 1495 legacy_event_type = 1; 1496 break; 1497 case 0b0010010: 1498 // ADV_SCAN_IND 1499 legacy_event_type = 2; 1500 break; 1501 case 0b0010000: 1502 // ADV_NONCONN_IND 1503 legacy_event_type = 3; 1504 break; 1505 case 0b0011011: 1506 case 0b0011010: 1507 // SCAN_RSP 1508 legacy_event_type = 4; 1509 break; 1510 default: 1511 legacy_event_type = 0; 1512 break; 1513 } 1514 uint16_t pos = 0; 1515 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1516 event[pos++] = 10u + data_length; 1517 event[pos++] = legacy_event_type; 1518 // copy address type + address 1519 (void) memcpy(&event[pos], &packet[offset], 1 + 6); 1520 offset += 7; 1521 pos += 7; 1522 // skip primary_phy, secondary_phy, advertising_sid, tx_power 1523 offset += 4; 1524 // copy rssi 1525 event[pos++] = packet[offset++]; 1526 // skip periodic advertising interval and direct address 1527 offset += 9; 1528 // copy data len + data; 1529 (void) memcpy(&event[pos], &packet[offset], 1 + data_length); 1530 pos += 1 +data_length; 1531 offset += 1+ data_length; 1532 hci_emit_event(event, pos, 1); 1533 } else { 1534 event[0] = GAP_EVENT_EXTENDED_ADVERTISING_REPORT; 1535 uint8_t report_len = 24 + data_length; 1536 event[1] = report_len; 1537 little_endian_store_16(event, 2, event_type); 1538 memcpy(&event[4], &packet[offset], report_len); 1539 offset += report_len; 1540 hci_emit_event(event, 2 + report_len, 1); 1541 } 1542 } 1543 } 1544 #endif 1545 1546 #endif 1547 #endif 1548 1549 #ifdef ENABLE_BLE 1550 #ifdef ENABLE_LE_PERIPHERAL 1551 static void hci_update_advertisements_enabled_for_current_roles(void){ 1552 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ENABLED) != 0){ 1553 // get number of active le slave connections 1554 int num_slave_connections = 0; 1555 btstack_linked_list_iterator_t it; 1556 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1557 while (btstack_linked_list_iterator_has_next(&it)){ 1558 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1559 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1560 if (con->state != OPEN) continue; 1561 if (con->role != HCI_ROLE_SLAVE) continue; 1562 if (!hci_is_le_connection(con)) continue; 1563 num_slave_connections++; 1564 } 1565 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1566 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1567 } else { 1568 hci_stack->le_advertisements_enabled_for_current_roles = false; 1569 } 1570 } 1571 #endif 1572 #endif 1573 1574 #ifdef ENABLE_CLASSIC 1575 static void gap_run_set_local_name(void){ 1576 hci_reserve_packet_buffer(); 1577 uint8_t * packet = hci_stack->hci_packet_buffer; 1578 // construct HCI Command and send 1579 uint16_t opcode = hci_write_local_name.opcode; 1580 hci_stack->last_cmd_opcode = opcode; 1581 packet[0] = opcode & 0xff; 1582 packet[1] = opcode >> 8; 1583 packet[2] = DEVICE_NAME_LEN; 1584 memset(&packet[3], 0, DEVICE_NAME_LEN); 1585 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1586 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1587 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1588 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1589 // expand '00:00:00:00:00:00' in name with bd_addr 1590 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1591 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1592 } 1593 1594 static void gap_run_set_eir_data(void){ 1595 hci_reserve_packet_buffer(); 1596 uint8_t * packet = hci_stack->hci_packet_buffer; 1597 // construct HCI Command in-place and send 1598 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1599 hci_stack->last_cmd_opcode = opcode; 1600 uint16_t offset = 0; 1601 packet[offset++] = opcode & 0xff; 1602 packet[offset++] = opcode >> 8; 1603 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1604 packet[offset++] = 0; // FEC not required 1605 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1606 if (hci_stack->eir_data){ 1607 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1608 ad_context_t context; 1609 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1610 uint8_t data_type = ad_iterator_get_data_type(&context); 1611 uint8_t size = ad_iterator_get_data_len(&context); 1612 const uint8_t *data = ad_iterator_get_data(&context); 1613 // copy item 1614 packet[offset++] = size + 1; 1615 packet[offset++] = data_type; 1616 memcpy(&packet[offset], data, size); 1617 // update name item 1618 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1619 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1620 } 1621 offset += size; 1622 } 1623 } else { 1624 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1625 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1626 packet[offset++] = bytes_to_copy + 1; 1627 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1628 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1629 // expand '00:00:00:00:00:00' in name with bd_addr 1630 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1631 } 1632 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1633 } 1634 1635 static void hci_run_gap_tasks_classic(void){ 1636 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1637 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1638 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1639 return; 1640 } 1641 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_LOCAL_NAME) != 0) { 1642 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_LOCAL_NAME; 1643 gap_run_set_local_name(); 1644 return; 1645 } 1646 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_EIR_DATA) != 0) { 1647 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_EIR_DATA; 1648 gap_run_set_eir_data(); 1649 return; 1650 } 1651 if ((hci_stack->gap_tasks_classic & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1652 hci_stack->gap_tasks_classic &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1653 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1654 return; 1655 } 1656 // write page scan activity 1657 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1658 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1659 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1660 return; 1661 } 1662 // write page scan type 1663 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1664 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1665 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1666 return; 1667 } 1668 // write page timeout 1669 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1670 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1671 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1672 return; 1673 } 1674 // send scan enable 1675 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1676 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1677 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1678 return; 1679 } 1680 // send write scan activity 1681 if ((hci_stack->gap_tasks_classic & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1682 hci_stack->gap_tasks_classic &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1683 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1684 return; 1685 } 1686 } 1687 #endif 1688 1689 #ifndef HAVE_HOST_CONTROLLER_API 1690 1691 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1692 if (!hci_stack->config) return 0; 1693 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1694 // Limit baud rate for Broadcom chipsets to 3 mbps 1695 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1696 baud_rate = 3000000; 1697 } 1698 return baud_rate; 1699 } 1700 1701 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1702 UNUSED(ds); 1703 1704 switch (hci_stack->substate){ 1705 case HCI_INIT_W4_SEND_RESET: 1706 log_info("Resend HCI Reset"); 1707 hci_stack->substate = HCI_INIT_SEND_RESET; 1708 hci_stack->num_cmd_packets = 1; 1709 hci_run(); 1710 break; 1711 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1712 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1713 if (hci_stack->hci_transport->reset_link){ 1714 hci_stack->hci_transport->reset_link(); 1715 } 1716 1717 /* fall through */ 1718 1719 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1720 log_info("Resend HCI Reset - CSR Warm Boot"); 1721 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1722 hci_stack->num_cmd_packets = 1; 1723 hci_run(); 1724 break; 1725 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1726 if (hci_stack->hci_transport->set_baudrate){ 1727 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1728 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1729 hci_stack->hci_transport->set_baudrate(baud_rate); 1730 } 1731 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1732 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1733 if (hci_stack->hci_transport->reset_link){ 1734 log_info("Link Reset"); 1735 hci_stack->hci_transport->reset_link(); 1736 } 1737 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1738 hci_run(); 1739 } 1740 break; 1741 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1742 // otherwise continue 1743 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1744 hci_send_cmd(&hci_read_local_supported_commands); 1745 break; 1746 default: 1747 break; 1748 } 1749 } 1750 #endif 1751 1752 static void hci_initializing_next_state(void){ 1753 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1754 } 1755 1756 static void hci_init_done(void){ 1757 // done. tell the app 1758 log_info("hci_init_done -> HCI_STATE_WORKING"); 1759 hci_stack->state = HCI_STATE_WORKING; 1760 hci_emit_state(); 1761 } 1762 1763 // assumption: hci_can_send_command_packet_now() == true 1764 static void hci_initializing_run(void){ 1765 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1766 1767 if (!hci_can_send_command_packet_now()) return; 1768 1769 #ifndef HAVE_HOST_CONTROLLER_API 1770 bool need_baud_change = hci_stack->config 1771 && hci_stack->chipset 1772 && hci_stack->chipset->set_baudrate_command 1773 && hci_stack->hci_transport->set_baudrate 1774 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1775 #endif 1776 1777 switch (hci_stack->substate){ 1778 case HCI_INIT_SEND_RESET: 1779 hci_state_reset(); 1780 1781 #ifndef HAVE_HOST_CONTROLLER_API 1782 // prepare reset if command complete not received in 100ms 1783 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1784 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1785 btstack_run_loop_add_timer(&hci_stack->timeout); 1786 #endif 1787 // send command 1788 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1789 hci_send_cmd(&hci_reset); 1790 break; 1791 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1792 hci_send_cmd(&hci_read_local_version_information); 1793 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1794 break; 1795 1796 #ifndef HAVE_HOST_CONTROLLER_API 1797 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1798 hci_state_reset(); 1799 // prepare reset if command complete not received in 100ms 1800 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1801 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1802 btstack_run_loop_add_timer(&hci_stack->timeout); 1803 // send command 1804 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1805 hci_send_cmd(&hci_reset); 1806 break; 1807 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1808 hci_state_reset(); 1809 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1810 hci_send_cmd(&hci_reset); 1811 break; 1812 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1813 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1814 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1815 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1816 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1817 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1818 break; 1819 } 1820 case HCI_INIT_SET_BD_ADDR: 1821 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1822 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1823 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1824 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1825 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1826 break; 1827 case HCI_INIT_SEND_READ_LOCAL_NAME: 1828 #ifdef ENABLE_CLASSIC 1829 hci_send_cmd(&hci_read_local_name); 1830 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1831 break; 1832 #endif 1833 /* fall through */ 1834 1835 case HCI_INIT_SEND_BAUD_CHANGE: 1836 if (need_baud_change) { 1837 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1838 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1839 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1840 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1841 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1842 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1843 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1844 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1845 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1846 btstack_run_loop_add_timer(&hci_stack->timeout); 1847 } 1848 break; 1849 } 1850 1851 /* fall through */ 1852 1853 case HCI_INIT_CUSTOM_INIT: 1854 // Custom initialization 1855 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1856 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1857 bool send_cmd = false; 1858 switch (hci_stack->chipset_result){ 1859 case BTSTACK_CHIPSET_VALID_COMMAND: 1860 send_cmd = true; 1861 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1862 break; 1863 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1864 send_cmd = true; 1865 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1866 log_info("CSR Warm Boot"); 1867 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1868 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1869 btstack_run_loop_add_timer(&hci_stack->timeout); 1870 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1871 && hci_stack->config 1872 && hci_stack->chipset 1873 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1874 && hci_stack->hci_transport->set_baudrate 1875 && hci_transport_uart_get_main_baud_rate()){ 1876 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1877 } else { 1878 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1879 } 1880 break; 1881 default: 1882 break; 1883 } 1884 1885 if (send_cmd){ 1886 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1887 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1888 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1889 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1890 break; 1891 } 1892 log_info("Init script done"); 1893 1894 // Init script download on Broadcom chipsets causes: 1895 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1896 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1897 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1898 1899 // - baud rate to reset, restore UART baud rate if needed 1900 if (need_baud_change) { 1901 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1902 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1903 hci_stack->hci_transport->set_baudrate(baud_rate); 1904 } 1905 1906 uint16_t bcm_delay_ms = 300; 1907 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1908 // -> Work around: wait here. 1909 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1910 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1911 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1912 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1913 btstack_run_loop_add_timer(&hci_stack->timeout); 1914 break; 1915 } 1916 } 1917 #endif 1918 /* fall through */ 1919 1920 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1921 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1922 hci_send_cmd(&hci_read_local_supported_commands); 1923 break; 1924 case HCI_INIT_READ_BD_ADDR: 1925 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1926 hci_send_cmd(&hci_read_bd_addr); 1927 break; 1928 case HCI_INIT_READ_BUFFER_SIZE: 1929 // only read buffer size if supported 1930 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_BUFFER_SIZE)){ 1931 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1932 hci_send_cmd(&hci_read_buffer_size); 1933 break; 1934 } 1935 1936 /* fall through */ 1937 1938 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1939 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1940 hci_send_cmd(&hci_read_local_supported_features); 1941 break; 1942 1943 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1944 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1945 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1946 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1947 break; 1948 case HCI_INIT_HOST_BUFFER_SIZE: 1949 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1950 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1951 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1952 break; 1953 #endif 1954 1955 case HCI_INIT_SET_EVENT_MASK: 1956 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1957 if (hci_le_supported()){ 1958 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1959 } else { 1960 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1961 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1962 } 1963 break; 1964 1965 case HCI_INIT_SET_EVENT_MASK_2: 1966 // On Bluettooth PTS dongle (BL 654) with PacketCraft HCI Firmware (LMP subversion) 0x5244, 1967 // setting Event Mask 2 causes Controller to drop Encryption Change events. 1968 if (hci_command_supported(SUPPORTED_HCI_COMMAND_SET_EVENT_MASK_PAGE_2) 1969 && (hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_PACKETCRAFT_INC)){ 1970 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK_2; 1971 // Encryption Change Event v2 - bit 25 1972 hci_send_cmd(&hci_set_event_mask_2,0x02000000U, 0x0); 1973 break; 1974 } 1975 1976 #ifdef ENABLE_CLASSIC 1977 /* fall through */ 1978 1979 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1980 if (hci_classic_supported() && gap_ssp_supported()){ 1981 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1982 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1983 break; 1984 } 1985 1986 /* fall through */ 1987 1988 case HCI_INIT_WRITE_INQUIRY_MODE: 1989 if (hci_classic_supported()){ 1990 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1991 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1992 break; 1993 } 1994 1995 /* fall through */ 1996 1997 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1998 // skip write secure connections host support if not supported or disabled 1999 if (hci_classic_supported() && hci_stack->secure_connections_enable 2000 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SECURE_CONNECTIONS_HOST)) { 2001 hci_stack->secure_connections_active = true; 2002 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 2003 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 2004 break; 2005 } 2006 2007 /* fall through */ 2008 2009 case HCI_INIT_SET_MIN_ENCRYPTION_KEY_SIZE: 2010 // skip set min encryption key size 2011 if (hci_classic_supported() && hci_command_supported(SUPPORTED_HCI_COMMAND_SET_MIN_ENCRYPTION_KEY_SIZE)) { 2012 hci_stack->substate = HCI_INIT_W4_SET_MIN_ENCRYPTION_KEY_SIZE; 2013 hci_send_cmd(&hci_set_min_encryption_key_size, hci_stack->gap_required_encyrption_key_size); 2014 break; 2015 } 2016 2017 #ifdef ENABLE_SCO_OVER_HCI 2018 /* fall through */ 2019 2020 // only sent if ENABLE_SCO_OVER_HCI is defined 2021 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2022 // skip write synchronous flow control if not supported 2023 if (hci_classic_supported() 2024 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE)) { 2025 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 2026 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 2027 break; 2028 } 2029 /* fall through */ 2030 2031 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 2032 // skip write default erroneous data reporting if not supported 2033 if (hci_classic_supported() 2034 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING)) { 2035 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 2036 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 2037 break; 2038 } 2039 #endif 2040 2041 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 2042 /* fall through */ 2043 2044 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 2045 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 2046 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2047 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 2048 #ifdef ENABLE_SCO_OVER_HCI 2049 log_info("BCM: Route SCO data via HCI transport"); 2050 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 2051 #endif 2052 #ifdef ENABLE_SCO_OVER_PCM 2053 log_info("BCM: Route SCO data via PCM interface"); 2054 #ifdef ENABLE_BCM_PCM_WBS 2055 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 2056 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 2057 #else 2058 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2059 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 2060 #endif 2061 #endif 2062 break; 2063 } 2064 #endif 2065 2066 #ifdef ENABLE_SCO_OVER_PCM 2067 /* fall through */ 2068 2069 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 2070 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 2071 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 2072 log_info("BCM: Config PCM interface for I2S"); 2073 #ifdef ENABLE_BCM_PCM_WBS 2074 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 2075 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 2076 #else 2077 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 2078 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 2079 #endif 2080 break; 2081 } 2082 #endif 2083 #endif 2084 2085 #ifdef ENABLE_BLE 2086 /* fall through */ 2087 2088 // LE INIT 2089 case HCI_INIT_LE_READ_BUFFER_SIZE: 2090 if (hci_le_supported()){ 2091 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 2092 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_BUFFER_SIZE_V2)){ 2093 hci_send_cmd(&hci_le_read_buffer_size_v2); 2094 } else { 2095 hci_send_cmd(&hci_le_read_buffer_size); 2096 } 2097 break; 2098 } 2099 2100 /* fall through */ 2101 2102 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 2103 // skip write le host if not supported (e.g. on LE only EM9301) 2104 if (hci_le_supported() 2105 && hci_command_supported(SUPPORTED_HCI_COMMAND_WRITE_LE_HOST_SUPPORTED)) { 2106 // LE Supported Host = 1, Simultaneous Host = 0 2107 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 2108 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 2109 break; 2110 } 2111 2112 /* fall through */ 2113 2114 case HCI_INIT_LE_SET_EVENT_MASK: 2115 if (hci_le_supported()){ 2116 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 2117 hci_send_cmd(&hci_le_set_event_mask, 0xfffffdff, 0x07); // all events from core v5.3 without LE Enhanced Connection Complete 2118 break; 2119 } 2120 #endif 2121 2122 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2123 /* fall through */ 2124 2125 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 2126 if (hci_le_supported() 2127 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_READ_MAXIMUM_DATA_LENGTH)) { 2128 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 2129 hci_send_cmd(&hci_le_read_maximum_data_length); 2130 break; 2131 } 2132 2133 /* fall through */ 2134 2135 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 2136 if (hci_le_supported() 2137 && hci_command_supported(SUPPORTED_HCI_COMMAND_LE_WRITE_SUGGESTED_DEFAULT_DATA_LENGTH)) { 2138 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 2139 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2140 break; 2141 } 2142 #endif 2143 2144 #ifdef ENABLE_LE_CENTRAL 2145 /* fall through */ 2146 2147 case HCI_INIT_READ_WHITE_LIST_SIZE: 2148 if (hci_le_supported()){ 2149 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 2150 hci_send_cmd(&hci_le_read_white_list_size); 2151 break; 2152 } 2153 2154 #endif 2155 2156 #ifdef ENABLE_LE_PERIPHERAL 2157 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2158 /* fall through */ 2159 2160 case HCI_INIT_LE_READ_MAX_ADV_DATA_LEN: 2161 if (hci_extended_advertising_supported()){ 2162 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_ADV_DATA_LEN; 2163 hci_send_cmd(&hci_le_read_maximum_advertising_data_length); 2164 break; 2165 } 2166 #endif 2167 #endif 2168 /* fall through */ 2169 2170 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2171 case HCI_INIT_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS: 2172 if (hci_le_supported()) { 2173 hci_stack->substate = HCI_INIT_W4_LE_SET_HOST_FEATURE_CONNECTED_ISO_STREAMS; 2174 hci_send_cmd(&hci_le_set_host_feature, 32, 1); 2175 break; 2176 } 2177 #endif 2178 2179 /* fall through */ 2180 2181 case HCI_INIT_DONE: 2182 hci_stack->substate = HCI_INIT_DONE; 2183 // main init sequence complete 2184 #ifdef ENABLE_CLASSIC 2185 // check if initial Classic GAP Tasks are completed 2186 if (hci_classic_supported() && (hci_stack->gap_tasks_classic != 0)) { 2187 hci_run_gap_tasks_classic(); 2188 break; 2189 } 2190 #endif 2191 #ifdef ENABLE_BLE 2192 #ifdef ENABLE_LE_CENTRAL 2193 // check if initial LE GAP Tasks are completed 2194 if (hci_le_supported() && hci_stack->le_scanning_param_update) { 2195 hci_run_general_gap_le(); 2196 break; 2197 } 2198 #endif 2199 #endif 2200 hci_init_done(); 2201 break; 2202 2203 default: 2204 return; 2205 } 2206 } 2207 2208 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 2209 bool command_completed = false; 2210 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 2211 uint16_t opcode = little_endian_read_16(packet,3); 2212 if (opcode == hci_stack->last_cmd_opcode){ 2213 command_completed = true; 2214 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 2215 } else { 2216 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 2217 } 2218 } 2219 2220 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 2221 uint8_t status = packet[2]; 2222 uint16_t opcode = little_endian_read_16(packet,4); 2223 if (opcode == hci_stack->last_cmd_opcode){ 2224 if (status){ 2225 command_completed = true; 2226 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 2227 } else { 2228 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 2229 } 2230 } else { 2231 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 2232 } 2233 } 2234 #ifndef HAVE_HOST_CONTROLLER_API 2235 // Vendor == CSR 2236 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2237 // TODO: track actual command 2238 command_completed = true; 2239 } 2240 2241 // Vendor == Toshiba 2242 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 2243 // TODO: track actual command 2244 command_completed = true; 2245 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 2246 hci_stack->num_cmd_packets = 1; 2247 } 2248 #endif 2249 2250 return command_completed; 2251 } 2252 2253 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 2254 2255 UNUSED(size); // ok: less than 6 bytes are read from our buffer 2256 2257 bool command_completed = hci_initializing_event_handler_command_completed(packet); 2258 2259 #ifndef HAVE_HOST_CONTROLLER_API 2260 2261 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 2262 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 2263 // 2264 // HCI Reset 2265 // Timeout 100 ms 2266 // HCI Reset 2267 // Command Complete Reset 2268 // HCI Read Local Version Information 2269 // Command Complete Reset - but we expected Command Complete Read Local Version Information 2270 // hang... 2271 // 2272 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2273 if (!command_completed 2274 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2275 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 2276 2277 uint16_t opcode = little_endian_read_16(packet,3); 2278 if (opcode == hci_reset.opcode){ 2279 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2280 return; 2281 } 2282 } 2283 2284 // CSR & H5 2285 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 2286 if (!command_completed 2287 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2288 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 2289 2290 uint16_t opcode = little_endian_read_16(packet,3); 2291 if (opcode == hci_reset.opcode){ 2292 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 2293 return; 2294 } 2295 } 2296 2297 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 2298 // fix: Correct substate and behave as command below 2299 if (command_completed){ 2300 switch (hci_stack->substate){ 2301 case HCI_INIT_SEND_RESET: 2302 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 2303 break; 2304 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 2305 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 2306 break; 2307 default: 2308 break; 2309 } 2310 } 2311 2312 #endif 2313 2314 if (!command_completed) return; 2315 2316 bool need_baud_change = false; 2317 bool need_addr_change = false; 2318 2319 #ifndef HAVE_HOST_CONTROLLER_API 2320 need_baud_change = hci_stack->config 2321 && hci_stack->chipset 2322 && hci_stack->chipset->set_baudrate_command 2323 && hci_stack->hci_transport->set_baudrate 2324 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 2325 2326 need_addr_change = hci_stack->custom_bd_addr_set 2327 && hci_stack->chipset 2328 && hci_stack->chipset->set_bd_addr_command; 2329 #endif 2330 2331 switch(hci_stack->substate){ 2332 2333 #ifndef HAVE_HOST_CONTROLLER_API 2334 case HCI_INIT_SEND_RESET: 2335 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 2336 // fix: just correct substate and behave as command below 2337 2338 /* fall through */ 2339 #endif 2340 2341 case HCI_INIT_W4_SEND_RESET: 2342 btstack_run_loop_remove_timer(&hci_stack->timeout); 2343 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 2344 return; 2345 2346 #ifndef HAVE_HOST_CONTROLLER_API 2347 case HCI_INIT_W4_SEND_BAUD_CHANGE: 2348 // for STLC2500D, baud rate change already happened. 2349 // for others, baud rate gets changed now 2350 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 2351 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2352 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 2353 hci_stack->hci_transport->set_baudrate(baud_rate); 2354 } 2355 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2356 return; 2357 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 2358 btstack_run_loop_remove_timer(&hci_stack->timeout); 2359 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2360 return; 2361 case HCI_INIT_W4_CUSTOM_INIT: 2362 // repeat custom init 2363 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 2364 return; 2365 #endif 2366 2367 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 2368 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 2369 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 2370 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 2371 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 2372 return; 2373 } 2374 if (need_addr_change){ 2375 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2376 return; 2377 } 2378 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2379 return; 2380 #ifndef HAVE_HOST_CONTROLLER_API 2381 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2382 if (need_baud_change){ 2383 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2384 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2385 hci_stack->hci_transport->set_baudrate(baud_rate); 2386 } 2387 if (need_addr_change){ 2388 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2389 return; 2390 } 2391 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2392 return; 2393 case HCI_INIT_W4_SET_BD_ADDR: 2394 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2395 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2396 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2397 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2398 return; 2399 } 2400 // skipping st warm boot 2401 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2402 return; 2403 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2404 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2405 return; 2406 #endif 2407 2408 case HCI_INIT_DONE: 2409 // set state if we came here by fall through 2410 hci_stack->substate = HCI_INIT_DONE; 2411 return; 2412 2413 default: 2414 break; 2415 } 2416 hci_initializing_next_state(); 2417 } 2418 2419 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2420 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2421 // To prevent accidentally free'ing the HCI connection for the ACL connection, 2422 // check if we have been aware of the HCI connection 2423 switch (conn->state){ 2424 case SENT_CREATE_CONNECTION: 2425 case RECEIVED_CONNECTION_REQUEST: 2426 break; 2427 default: 2428 return; 2429 } 2430 2431 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2432 bd_addr_t bd_address; 2433 (void)memcpy(&bd_address, conn->address, 6); 2434 2435 #ifdef ENABLE_CLASSIC 2436 // cache needed data 2437 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2438 #endif 2439 2440 // connection failed, remove entry 2441 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2442 btstack_memory_hci_connection_free( conn ); 2443 2444 #ifdef ENABLE_CLASSIC 2445 // notify client if dedicated bonding 2446 if (notify_dedicated_bonding_failed){ 2447 log_info("hci notify_dedicated_bonding_failed"); 2448 hci_emit_dedicated_bonding_result(bd_address, status); 2449 } 2450 2451 // if authentication error, also delete link key 2452 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2453 gap_drop_link_key_for_bd_addr(bd_address); 2454 } 2455 #else 2456 UNUSED(status); 2457 #endif 2458 } 2459 2460 #ifdef ENABLE_CLASSIC 2461 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2462 // SSP Controller 2463 if (features[6] & (1 << 3)){ 2464 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2465 } 2466 // eSCO 2467 if (features[3] & (1<<7)){ 2468 conn->remote_supported_features[0] |= 1; 2469 } 2470 // Extended features 2471 if (features[7] & (1<<7)){ 2472 conn->remote_supported_features[0] |= 2; 2473 } 2474 } 2475 2476 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2477 // SSP Host 2478 if (features[0] & (1 << 0)){ 2479 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2480 } 2481 // SC Host 2482 if (features[0] & (1 << 3)){ 2483 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2484 } 2485 } 2486 2487 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2488 // SC Controller 2489 if (features[1] & (1 << 0)){ 2490 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2491 } 2492 } 2493 2494 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2495 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2496 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2497 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2498 if (conn->bonding_flags & BONDING_DEDICATED){ 2499 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2500 } 2501 } 2502 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2503 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2504 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2505 } 2506 2507 #endif 2508 2509 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2510 // handle BT initialization 2511 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2512 hci_initializing_event_handler(packet, size); 2513 } 2514 2515 // help with BT sleep 2516 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2517 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2518 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 2519 && (hci_event_command_complete_get_command_opcode(packet) == HCI_OPCODE_HCI_WRITE_SCAN_ENABLE)){ 2520 hci_initializing_next_state(); 2521 } 2522 } 2523 2524 #ifdef ENABLE_CLASSIC 2525 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2526 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2527 conn->encryption_key_size = encryption_key_size; 2528 gap_security_level_t security_level = gap_security_level_for_connection(conn); 2529 2530 // trigger disconnect for dedicated bonding, skip emit security level as disconnect is pending 2531 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 2532 conn->bonding_flags &= ~BONDING_DEDICATED; 2533 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2534 conn->bonding_status = security_level == 0 ? ERROR_CODE_INSUFFICIENT_SECURITY : ERROR_CODE_SUCCESS; 2535 return; 2536 } 2537 2538 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2539 conn->requested_security_level = LEVEL_0; 2540 hci_emit_security_level(conn->con_handle, security_level); 2541 return; 2542 } 2543 2544 // Request remote features if not already done 2545 hci_trigger_remote_features_for_connection(conn); 2546 2547 // Request Authentication if not already done 2548 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2549 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2550 } 2551 #endif 2552 2553 static void hci_store_local_supported_commands(const uint8_t * packet){ 2554 // create mapping table 2555 #define X(name, offset, bit) { offset, bit }, 2556 static struct { 2557 uint8_t byte_offset; 2558 uint8_t bit_position; 2559 } supported_hci_commands_map [] = { 2560 SUPPORTED_HCI_COMMANDS 2561 }; 2562 #undef X 2563 2564 // create names for debug purposes 2565 #ifdef ENABLE_LOG_DEBUG 2566 #define X(name, offset, bit) #name, 2567 static const char * command_names[] = { 2568 SUPPORTED_HCI_COMMANDS 2569 }; 2570 #undef X 2571 #endif 2572 2573 hci_stack->local_supported_commands = 0; 2574 const uint8_t * commands_map = &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1]; 2575 uint16_t i; 2576 for (i = 0 ; i < SUPPORTED_HCI_COMMANDS_COUNT ; i++){ 2577 if ((commands_map[supported_hci_commands_map[i].byte_offset] & (1 << supported_hci_commands_map[i].bit_position)) != 0){ 2578 #ifdef ENABLE_LOG_DEBUG 2579 log_info("Command %s (%u) supported %u/%u", command_names[i], i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2580 #else 2581 log_info("Command 0x%02x supported %u/%u", i, supported_hci_commands_map[i].byte_offset, supported_hci_commands_map[i].bit_position); 2582 #endif 2583 hci_stack->local_supported_commands |= (1LU << i); 2584 } 2585 } 2586 log_info("Local supported commands summary %04x", hci_stack->local_supported_commands); 2587 } 2588 2589 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2590 UNUSED(size); 2591 2592 uint16_t manufacturer; 2593 #ifdef ENABLE_CLASSIC 2594 hci_con_handle_t handle; 2595 hci_connection_t * conn; 2596 #endif 2597 #if defined(ENABLE_CLASSIC) || (defined(ENABLE_BLE) && defined(ENABLE_LE_ISOCHRONOUS_STREAMS)) 2598 uint8_t status; 2599 #endif 2600 // get num cmd packets - limit to 1 to reduce complexity 2601 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2602 2603 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2604 switch (opcode){ 2605 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2606 if (packet[5]) break; 2607 // terminate, name 248 chars 2608 packet[6+248] = 0; 2609 log_info("local name: %s", &packet[6]); 2610 break; 2611 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2612 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2613 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2614 uint16_t acl_len = little_endian_read_16(packet, 6); 2615 uint16_t sco_len = packet[8]; 2616 2617 // determine usable ACL/SCO payload size 2618 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2619 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2620 2621 hci_stack->acl_packets_total_num = (uint8_t) little_endian_read_16(packet, 9); 2622 hci_stack->sco_packets_total_num = (uint8_t) little_endian_read_16(packet, 11); 2623 2624 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2625 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2626 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2627 } 2628 break; 2629 case HCI_OPCODE_HCI_READ_RSSI: 2630 if (packet[5] == ERROR_CODE_SUCCESS){ 2631 uint8_t event[5]; 2632 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2633 event[1] = 3; 2634 (void)memcpy(&event[2], &packet[6], 3); 2635 hci_emit_event(event, sizeof(event), 1); 2636 } 2637 break; 2638 #ifdef ENABLE_BLE 2639 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE_V2: 2640 hci_stack->le_iso_packets_length = little_endian_read_16(packet, 9); 2641 hci_stack->le_iso_packets_total_num = packet[11]; 2642 log_info("hci_le_read_buffer_size_v2: iso size %u, iso count %u", 2643 hci_stack->le_iso_packets_length, hci_stack->le_iso_packets_total_num); 2644 2645 /* fall through */ 2646 2647 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2648 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2649 hci_stack->le_acl_packets_total_num = packet[8]; 2650 // determine usable ACL payload size 2651 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2652 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2653 } 2654 log_info("hci_le_read_buffer_size: acl size %u, acl count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2655 break; 2656 #endif 2657 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2658 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2659 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2660 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2661 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2662 break; 2663 #endif 2664 #ifdef ENABLE_LE_CENTRAL 2665 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2666 hci_stack->le_whitelist_capacity = packet[6]; 2667 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2668 break; 2669 #endif 2670 #ifdef ENABLE_LE_PERIPHERAL 2671 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 2672 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_ADVERTISING_DATA_LENGTH: 2673 hci_stack->le_maximum_advertising_data_length = little_endian_read_16(packet, 6); 2674 break; 2675 case HCI_OPCODE_HCI_LE_SET_EXTENDED_ADVERTISING_PARAMETERS: 2676 if (hci_stack->le_advertising_set_in_current_command != 0) { 2677 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2678 hci_stack->le_advertising_set_in_current_command = 0; 2679 if (advertising_set == NULL) break; 2680 uint8_t adv_status = packet[6]; 2681 uint8_t tx_power = packet[7]; 2682 uint8_t event[] = { HCI_EVENT_META_GAP, 4, GAP_SUBEVENT_ADVERTISING_SET_INSTALLED, hci_stack->le_advertising_set_in_current_command, adv_status, tx_power }; 2683 if (adv_status == 0){ 2684 advertising_set->state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 2685 } 2686 hci_emit_event(event, sizeof(event), 1); 2687 } 2688 break; 2689 case HCI_OPCODE_HCI_LE_REMOVE_ADVERTISING_SET: 2690 if (hci_stack->le_advertising_set_in_current_command != 0) { 2691 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(hci_stack->le_advertising_set_in_current_command); 2692 hci_stack->le_advertising_set_in_current_command = 0; 2693 if (advertising_set == NULL) break; 2694 uint8_t adv_status = packet[5]; 2695 uint8_t event[] = { HCI_EVENT_META_GAP, 3, GAP_SUBEVENT_ADVERTISING_SET_REMOVED, hci_stack->le_advertising_set_in_current_command, adv_status }; 2696 if (adv_status == 0){ 2697 btstack_linked_list_remove(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) advertising_set); 2698 } 2699 hci_emit_event(event, sizeof(event), 1); 2700 } 2701 break; 2702 #endif 2703 #endif 2704 case HCI_OPCODE_HCI_READ_BD_ADDR: 2705 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2706 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2707 #ifdef ENABLE_CLASSIC 2708 if (hci_stack->link_key_db){ 2709 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2710 } 2711 #endif 2712 break; 2713 #ifdef ENABLE_CLASSIC 2714 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2715 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 2716 break; 2717 case HCI_OPCODE_HCI_PERIODIC_INQUIRY_MODE: 2718 status = hci_event_command_complete_get_return_parameters(packet)[0]; 2719 if (status == ERROR_CODE_SUCCESS) { 2720 hci_stack->inquiry_state = GAP_INQUIRY_STATE_PERIODIC; 2721 } else { 2722 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2723 } 2724 break; 2725 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2726 case HCI_OPCODE_HCI_EXIT_PERIODIC_INQUIRY_MODE: 2727 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2728 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2729 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2730 hci_emit_event(event, sizeof(event), 1); 2731 } 2732 break; 2733 #endif 2734 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2735 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2736 2737 #ifdef ENABLE_CLASSIC 2738 // determine usable ACL packet types based on host buffer size and supported features 2739 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2740 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2741 #endif 2742 // Classic/LE 2743 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2744 break; 2745 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2746 manufacturer = little_endian_read_16(packet, 10); 2747 // map Cypress to Broadcom 2748 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2749 log_info("Treat Cypress as Broadcom"); 2750 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2751 little_endian_store_16(packet, 10, manufacturer); 2752 } 2753 hci_stack->manufacturer = manufacturer; 2754 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2755 break; 2756 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2757 hci_store_local_supported_commands(packet); 2758 break; 2759 #ifdef ENABLE_CLASSIC 2760 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2761 if (packet[5]) return; 2762 hci_stack->synchronous_flow_control_enabled = 1; 2763 break; 2764 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2765 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2766 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2767 conn = hci_connection_for_handle(handle); 2768 if (conn != NULL) { 2769 uint8_t key_size = 0; 2770 if (status == 0){ 2771 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2772 log_info("Handle %04x key Size: %u", handle, key_size); 2773 } else { 2774 key_size = 1; 2775 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2776 } 2777 hci_handle_read_encryption_key_size_complete(conn, key_size); 2778 } 2779 break; 2780 // assert pairing complete event is emitted. 2781 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2782 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2783 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2784 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2785 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2786 // lookup connection by gap pairing addr 2787 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2788 if (conn == NULL) break; 2789 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2790 break; 2791 2792 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2793 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2794 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2795 uint8_t event[67]; 2796 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2797 event[1] = 65; 2798 (void)memset(&event[2], 0, 65); 2799 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2800 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2801 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2802 event[2] = 3; 2803 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2804 } else { 2805 event[2] = 1; 2806 } 2807 } 2808 hci_emit_event(event, sizeof(event), 0); 2809 break; 2810 } 2811 2812 // note: only needed if user does not provide OOB data 2813 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2814 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2815 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2816 if (conn == NULL) break; 2817 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2818 break; 2819 #endif 2820 #endif 2821 #ifdef ENABLE_BLE 2822 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2823 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2824 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2825 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2826 if (status != ERROR_CODE_SUCCESS){ 2827 hci_iso_stream_requested_finalize(0xff); 2828 } 2829 break; 2830 case HCI_OPCODE_HCI_LE_SETUP_ISO_DATA_PATH: { 2831 // lookup BIG by state 2832 btstack_linked_list_iterator_t it; 2833 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 2834 while (btstack_linked_list_iterator_has_next(&it)) { 2835 le_audio_big_t *big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 2836 if (big->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2837 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2838 if (status == ERROR_CODE_SUCCESS){ 2839 big->state_vars.next_bis++; 2840 if (big->state_vars.next_bis == big->num_bis){ 2841 big->state = LE_AUDIO_BIG_STATE_ACTIVE; 2842 hci_emit_big_created(big, ERROR_CODE_SUCCESS); 2843 } else { 2844 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2845 } 2846 } else { 2847 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2848 big->state_vars.status = status; 2849 } 2850 return; 2851 } 2852 } 2853 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2854 while (btstack_linked_list_iterator_has_next(&it)) { 2855 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2856 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH){ 2857 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2858 if (status == ERROR_CODE_SUCCESS){ 2859 big_sync->state_vars.next_bis++; 2860 if (big_sync->state_vars.next_bis == big_sync->num_bis){ 2861 big_sync->state = LE_AUDIO_BIG_STATE_ACTIVE; 2862 hci_emit_big_sync_created(big_sync, ERROR_CODE_SUCCESS); 2863 } else { 2864 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 2865 } 2866 } else { 2867 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED; 2868 big_sync->state_vars.status = status; 2869 } 2870 return; 2871 } 2872 } 2873 break; 2874 } 2875 case HCI_OPCODE_HCI_LE_BIG_TERMINATE_SYNC: { 2876 // lookup BIG by state 2877 btstack_linked_list_iterator_t it; 2878 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 2879 while (btstack_linked_list_iterator_has_next(&it)) { 2880 le_audio_big_sync_t *big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 2881 uint8_t big_handle = big_sync->big_handle; 2882 switch (big_sync->state){ 2883 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 2884 btstack_linked_list_iterator_remove(&it); 2885 hci_emit_big_sync_created(big_sync, big_sync->state_vars.status); 2886 return; 2887 default: 2888 btstack_linked_list_iterator_remove(&it); 2889 hci_emit_big_sync_stopped(big_handle); 2890 return; 2891 } 2892 } 2893 break; 2894 } 2895 #endif 2896 #endif 2897 default: 2898 break; 2899 } 2900 } 2901 2902 static void handle_command_status_event(uint8_t * packet, uint16_t size) { 2903 UNUSED(size); 2904 2905 // get num cmd packets - limit to 1 to reduce complexity 2906 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2907 2908 // get opcode and command status 2909 uint16_t opcode = hci_event_command_status_get_command_opcode(packet); 2910 2911 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) || defined(ENABLE_LE_ISOCHRONOUS_STREAMS) 2912 uint8_t status = hci_event_command_status_get_status(packet); 2913 #endif 2914 2915 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2916 bd_addr_type_t addr_type; 2917 #endif 2918 2919 switch (opcode){ 2920 #ifdef ENABLE_CLASSIC 2921 case HCI_OPCODE_HCI_CREATE_CONNECTION: 2922 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 2923 #endif 2924 #ifdef ENABLE_LE_CENTRAL 2925 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 2926 #endif 2927 #if defined(ENABLE_CLASSIC) || defined(ENABLE_LE_CENTRAL) 2928 addr_type = hci_stack->outgoing_addr_type; 2929 2930 // reset outgoing address info 2931 memset(hci_stack->outgoing_addr, 0, 6); 2932 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2933 2934 // on error 2935 if (status != ERROR_CODE_SUCCESS){ 2936 #ifdef ENABLE_LE_CENTRAL 2937 if (hci_is_le_connection_type(addr_type)){ 2938 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2939 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2940 } 2941 #endif 2942 // error => outgoing connection failed 2943 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2944 if (conn != NULL){ 2945 hci_handle_connection_failed(conn, status); 2946 } 2947 } 2948 break; 2949 #endif 2950 #ifdef ENABLE_CLASSIC 2951 case HCI_OPCODE_HCI_INQUIRY: 2952 if (status == ERROR_CODE_SUCCESS) { 2953 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2954 } else { 2955 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2956 } 2957 break; 2958 #endif 2959 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 2960 case HCI_OPCODE_HCI_LE_CREATE_CIS: 2961 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 2962 if (status == ERROR_CODE_SUCCESS){ 2963 hci_iso_stream_requested_confirm(0xff); 2964 } else { 2965 hci_iso_stream_requested_finalize(0xff); 2966 } 2967 break; 2968 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 2969 default: 2970 break; 2971 } 2972 } 2973 2974 #ifdef ENABLE_BLE 2975 static void event_handle_le_connection_complete(const uint8_t * packet){ 2976 bd_addr_t addr; 2977 bd_addr_type_t addr_type; 2978 hci_connection_t * conn; 2979 2980 // Connection management 2981 reverse_bd_addr(&packet[8], addr); 2982 addr_type = (bd_addr_type_t)packet[7]; 2983 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2984 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2985 2986 #ifdef ENABLE_LE_CENTRAL 2987 // handle error: error is reported only to the initiator -> outgoing connection 2988 if (packet[3]){ 2989 2990 // handle cancelled outgoing connection 2991 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2992 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2993 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2994 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2995 // reset state 2996 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2997 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2998 // get outgoing connection conn struct for direct connect 2999 conn = gap_get_outgoing_connection(); 3000 } 3001 3002 // outgoing le connection establishment is done 3003 if (conn){ 3004 // remove entry 3005 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 3006 btstack_memory_hci_connection_free( conn ); 3007 } 3008 return; 3009 } 3010 #endif 3011 3012 // on success, both hosts receive connection complete event 3013 if (packet[6] == HCI_ROLE_MASTER){ 3014 #ifdef ENABLE_LE_CENTRAL 3015 // if we're master on an le connection, it was an outgoing connection and we're done with it 3016 // note: no hci_connection_t object exists yet for connect with whitelist 3017 if (hci_is_le_connection_type(addr_type)){ 3018 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3019 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3020 } 3021 #endif 3022 } else { 3023 #ifdef ENABLE_LE_PERIPHERAL 3024 // if we're slave, it was an incoming connection, advertisements have stopped 3025 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 3026 #endif 3027 } 3028 3029 // LE connections are auto-accepted, so just create a connection if there isn't one already 3030 if (!conn){ 3031 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3032 } 3033 3034 // no memory, sorry. 3035 if (!conn){ 3036 return; 3037 } 3038 3039 conn->state = OPEN; 3040 conn->role = packet[6]; 3041 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 3042 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 3043 3044 #ifdef ENABLE_LE_PERIPHERAL 3045 if (packet[6] == HCI_ROLE_SLAVE){ 3046 hci_update_advertisements_enabled_for_current_roles(); 3047 } 3048 #endif 3049 3050 // init unenhanced att bearer mtu 3051 conn->att_connection.mtu = ATT_DEFAULT_MTU; 3052 conn->att_connection.mtu_exchanged = false; 3053 3054 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 3055 3056 // restart timer 3057 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3058 // btstack_run_loop_add_timer(&conn->timeout); 3059 3060 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3061 3062 hci_emit_nr_connections_changed(); 3063 } 3064 #endif 3065 3066 #ifdef ENABLE_CLASSIC 3067 static bool hci_ssp_security_level_possible_for_io_cap(gap_security_level_t level, uint8_t io_cap_local, uint8_t io_cap_remote){ 3068 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 3069 // LEVEL_4 is tested by l2cap 3070 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 3071 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 3072 if (level >= LEVEL_3){ 3073 // MITM not possible without keyboard or display 3074 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3075 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 3076 3077 // MITM possible if one side has keyboard and the other has keyboard or display 3078 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3079 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 3080 3081 // MITM not possible if one side has only display and other side has no keyboard 3082 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3083 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 3084 } 3085 // LEVEL 2 requires SSP, which is a given 3086 return true; 3087 } 3088 3089 static bool btstack_is_null(uint8_t * data, uint16_t size){ 3090 uint16_t i; 3091 for (i=0; i < size ; i++){ 3092 if (data[i] != 0) { 3093 return false; 3094 } 3095 } 3096 return true; 3097 } 3098 3099 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 3100 // get requested security level 3101 gap_security_level_t requested_security_level = conn->requested_security_level; 3102 if (hci_stack->gap_secure_connections_only_mode){ 3103 requested_security_level = LEVEL_4; 3104 } 3105 3106 // assess security: LEVEL 4 requires SC 3107 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 3108 if ((requested_security_level == LEVEL_4) && 3109 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 3110 !hci_remote_sc_enabled(conn)){ 3111 log_info("Level 4 required, but SC not supported -> abort"); 3112 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3113 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3114 return; 3115 } 3116 3117 // assess security based on io capabilities 3118 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 3119 // responder: fully validate io caps of both sides as well as OOB data 3120 bool security_possible = false; 3121 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 3122 3123 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3124 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 3125 // so we merge the OOB data availability 3126 uint8_t have_oob_data = conn->io_cap_response_oob_data; 3127 if (conn->classic_oob_c_192 != NULL){ 3128 have_oob_data |= 1; 3129 } 3130 if (conn->classic_oob_c_256 != NULL){ 3131 have_oob_data |= 2; 3132 } 3133 // for up to Level 3, either P-192 as well as P-256 will do 3134 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 3135 // if remote does not SC, we should not receive P-256 data either 3136 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 3137 security_possible = true; 3138 } 3139 // for Level 4, P-256 is needed 3140 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 3141 security_possible = true; 3142 } 3143 #endif 3144 3145 if (security_possible == false){ 3146 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 3147 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3148 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3149 return; 3150 } 3151 } else { 3152 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 3153 #ifndef ENABLE_CLASSIC_PAIRING_OOB 3154 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3155 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 3156 log_info("Level 3+ required, but no input/output -> abort"); 3157 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3158 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3159 return; 3160 } 3161 #endif 3162 #endif 3163 } 3164 3165 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 3166 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 3167 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 3168 } else { 3169 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 3170 } 3171 #endif 3172 } 3173 3174 #endif 3175 3176 static void event_handler(uint8_t *packet, uint16_t size){ 3177 3178 uint16_t event_length = packet[1]; 3179 3180 // assert packet is complete 3181 if (size != (event_length + 2u)){ 3182 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 3183 return; 3184 } 3185 3186 hci_con_handle_t handle; 3187 hci_connection_t * conn; 3188 int i; 3189 3190 #ifdef ENABLE_CLASSIC 3191 hci_link_type_t link_type; 3192 bd_addr_t addr; 3193 bd_addr_type_t addr_type; 3194 #endif 3195 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3196 hci_iso_stream_t * iso_stream; 3197 le_audio_big_t * big; 3198 le_audio_big_sync_t * big_sync; 3199 #endif 3200 3201 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 3202 3203 switch (hci_event_packet_get_type(packet)) { 3204 3205 case HCI_EVENT_COMMAND_COMPLETE: 3206 handle_command_complete_event(packet, size); 3207 break; 3208 3209 case HCI_EVENT_COMMAND_STATUS: 3210 handle_command_status_event(packet, size); 3211 break; 3212 3213 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 3214 if (size < 3) return; 3215 uint16_t num_handles = packet[2]; 3216 if (size != (3u + num_handles * 4u)) return; 3217 #ifdef ENABLE_CLASSIC 3218 bool notify_sco = false; 3219 #endif 3220 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3221 bool notify_iso = false; 3222 #endif 3223 uint16_t offset = 3; 3224 for (i=0; i<num_handles;i++){ 3225 handle = little_endian_read_16(packet, offset) & 0x0fffu; 3226 offset += 2u; 3227 uint16_t num_packets = little_endian_read_16(packet, offset); 3228 offset += 2u; 3229 3230 conn = hci_connection_for_handle(handle); 3231 if (conn != NULL) { 3232 3233 if (conn->num_packets_sent >= num_packets) { 3234 conn->num_packets_sent -= num_packets; 3235 } else { 3236 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3237 conn->num_packets_sent = 0; 3238 } 3239 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 3240 #ifdef ENABLE_CLASSIC 3241 if (conn->address_type == BD_ADDR_TYPE_SCO){ 3242 notify_sco = true; 3243 } 3244 #endif 3245 } 3246 3247 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 3248 hci_controller_dump_packets(); 3249 #endif 3250 3251 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3252 if (conn == NULL){ 3253 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(handle); 3254 if (iso_stream != NULL){ 3255 if (iso_stream->num_packets_sent >= num_packets) { 3256 iso_stream->num_packets_sent -= num_packets; 3257 } else { 3258 log_error("hci_number_completed_packets, more packet slots freed then sent."); 3259 iso_stream->num_packets_sent = 0; 3260 } 3261 if (iso_stream->iso_type == HCI_ISO_TYPE_BIS){ 3262 le_audio_big_t * big = hci_big_for_handle(iso_stream->group_id); 3263 if (big != NULL){ 3264 big->num_completed_timestamp_current_valid = true; 3265 big->num_completed_timestamp_current_ms = btstack_run_loop_get_time_ms(); 3266 } 3267 } 3268 log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", 3269 num_packets, handle, iso_stream->num_packets_sent); 3270 notify_iso = true; 3271 } 3272 } 3273 #endif 3274 } 3275 3276 #ifdef ENABLE_CLASSIC 3277 if (notify_sco){ 3278 hci_notify_if_sco_can_send_now(); 3279 } 3280 #endif 3281 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3282 if (notify_iso){ 3283 hci_iso_notify_can_send_now(); 3284 } 3285 #endif 3286 break; 3287 } 3288 3289 #ifdef ENABLE_CLASSIC 3290 case HCI_EVENT_FLUSH_OCCURRED: 3291 // flush occurs only if automatic flush has been enabled by gap_enable_link_watchdog() 3292 handle = hci_event_flush_occurred_get_handle(packet); 3293 conn = hci_connection_for_handle(handle); 3294 if (conn) { 3295 log_info("Flush occurred, disconnect 0x%04x", handle); 3296 conn->state = SEND_DISCONNECT; 3297 } 3298 break; 3299 3300 case HCI_EVENT_INQUIRY_COMPLETE: 3301 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 3302 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 3303 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 3304 hci_emit_event(event, sizeof(event), 1); 3305 } 3306 break; 3307 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 3308 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 3309 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 3310 } 3311 break; 3312 case HCI_EVENT_CONNECTION_REQUEST: 3313 reverse_bd_addr(&packet[2], addr); 3314 link_type = (hci_link_type_t) packet[11]; 3315 3316 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 3317 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 3318 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 3319 bd_addr_copy(hci_stack->decline_addr, addr); 3320 break; 3321 } 3322 3323 if (hci_stack->gap_classic_accept_callback != NULL){ 3324 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 3325 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS; 3326 bd_addr_copy(hci_stack->decline_addr, addr); 3327 break; 3328 } 3329 } 3330 3331 // TODO: eval COD 8-10 3332 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 3333 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 3334 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3335 if (!conn) { 3336 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 3337 } 3338 if (!conn) { 3339 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 3340 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 3341 bd_addr_copy(hci_stack->decline_addr, addr); 3342 hci_run(); 3343 // avoid event to higher layer 3344 return; 3345 } 3346 conn->role = HCI_ROLE_SLAVE; 3347 conn->state = RECEIVED_CONNECTION_REQUEST; 3348 // store info about eSCO 3349 if (link_type == HCI_LINK_TYPE_ESCO){ 3350 conn->remote_supported_features[0] |= 1; 3351 } 3352 hci_run(); 3353 break; 3354 3355 case HCI_EVENT_CONNECTION_COMPLETE: 3356 // Connection management 3357 reverse_bd_addr(&packet[5], addr); 3358 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 3359 addr_type = BD_ADDR_TYPE_ACL; 3360 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3361 if (conn) { 3362 if (!packet[2]){ 3363 conn->state = OPEN; 3364 conn->con_handle = little_endian_read_16(packet, 3); 3365 3366 // trigger write supervision timeout if we're master 3367 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 3368 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 3369 } 3370 3371 // trigger write automatic flush timeout 3372 if (hci_stack->automatic_flush_timeout != 0){ 3373 conn->gap_connection_tasks |= GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 3374 } 3375 3376 // restart timer 3377 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 3378 btstack_run_loop_add_timer(&conn->timeout); 3379 3380 // trigger remote features for dedicated bonding 3381 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3382 hci_trigger_remote_features_for_connection(conn); 3383 } 3384 3385 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 3386 3387 hci_emit_nr_connections_changed(); 3388 } else { 3389 // connection failed 3390 hci_handle_connection_failed(conn, packet[2]); 3391 } 3392 } 3393 break; 3394 3395 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 3396 reverse_bd_addr(&packet[5], addr); 3397 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3398 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 3399 if (packet[2]){ 3400 // connection failed 3401 if (conn){ 3402 hci_handle_connection_failed(conn, packet[2]); 3403 } 3404 break; 3405 } 3406 if (!conn) { 3407 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 3408 } 3409 if (!conn) { 3410 break; 3411 } 3412 conn->state = OPEN; 3413 conn->con_handle = little_endian_read_16(packet, 3); 3414 3415 #ifdef ENABLE_SCO_OVER_HCI 3416 // update SCO 3417 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 3418 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 3419 } 3420 // trigger can send now 3421 if (hci_have_usb_transport()){ 3422 hci_stack->sco_can_send_now = true; 3423 } 3424 #endif 3425 #ifdef HAVE_SCO_TRANSPORT 3426 // configure sco transport 3427 if (hci_stack->sco_transport != NULL){ 3428 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 3429 hci_stack->sco_transport->open(conn->con_handle, sco_format); 3430 } 3431 #endif 3432 break; 3433 3434 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 3435 handle = little_endian_read_16(packet, 3); 3436 conn = hci_connection_for_handle(handle); 3437 if (!conn) break; 3438 if (!packet[2]){ 3439 const uint8_t * features = &packet[5]; 3440 hci_handle_remote_features_page_0(conn, features); 3441 3442 // read extended features if possible 3443 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_REMOTE_EXTENDED_FEATURES) 3444 && ((conn->remote_supported_features[0] & 2) != 0)) { 3445 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 3446 break; 3447 } 3448 } 3449 hci_handle_remote_features_received(conn); 3450 break; 3451 3452 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 3453 handle = little_endian_read_16(packet, 3); 3454 conn = hci_connection_for_handle(handle); 3455 if (!conn) break; 3456 // status = ok, page = 1 3457 if (!packet[2]) { 3458 uint8_t page_number = packet[5]; 3459 uint8_t maximum_page_number = packet[6]; 3460 const uint8_t * features = &packet[7]; 3461 bool done = false; 3462 switch (page_number){ 3463 case 1: 3464 hci_handle_remote_features_page_1(conn, features); 3465 if (maximum_page_number >= 2){ 3466 // get Secure Connections (Controller) from Page 2 if available 3467 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 3468 } else { 3469 // otherwise, assume SC (Controller) == SC (Host) 3470 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 3471 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 3472 } 3473 done = true; 3474 } 3475 break; 3476 case 2: 3477 hci_handle_remote_features_page_2(conn, features); 3478 done = true; 3479 break; 3480 default: 3481 break; 3482 } 3483 if (!done) break; 3484 } 3485 hci_handle_remote_features_received(conn); 3486 break; 3487 3488 case HCI_EVENT_LINK_KEY_REQUEST: 3489 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 3490 hci_event_link_key_request_get_bd_addr(packet, addr); 3491 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3492 if (!conn) break; 3493 3494 // lookup link key in db if not cached 3495 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 3496 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 3497 } 3498 3499 // response sent by hci_run() 3500 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 3501 #endif 3502 break; 3503 3504 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 3505 hci_event_link_key_request_get_bd_addr(packet, addr); 3506 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3507 if (!conn) break; 3508 3509 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 3510 3511 // CVE-2020-26555: ignore NULL link key 3512 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 3513 if (btstack_is_null(&packet[8], 16)) break; 3514 3515 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 3516 // Change Connection Encryption keeps link key type 3517 if (link_key_type != CHANGED_COMBINATION_KEY){ 3518 conn->link_key_type = link_key_type; 3519 } 3520 3521 // cache link key. link keys stored in little-endian format for legacy reasons 3522 memcpy(&conn->link_key, &packet[8], 16); 3523 3524 // only store link key: 3525 // - if bondable enabled 3526 if (hci_stack->bondable == false) break; 3527 // - if security level sufficient 3528 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 3529 // - for SSP, also check if remote side requested bonding as well 3530 if (conn->link_key_type != COMBINATION_KEY){ 3531 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 3532 if (!remote_bonding){ 3533 break; 3534 } 3535 } 3536 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 3537 break; 3538 } 3539 3540 case HCI_EVENT_PIN_CODE_REQUEST: 3541 hci_event_pin_code_request_get_bd_addr(packet, addr); 3542 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3543 if (!conn) break; 3544 3545 hci_pairing_started(conn, false); 3546 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 3547 if (!hci_stack->bondable ){ 3548 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3549 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 3550 hci_run(); 3551 return; 3552 } 3553 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 3554 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 3555 log_info("Level 4 required, but SC not supported -> abort"); 3556 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 3557 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3558 hci_run(); 3559 return; 3560 } 3561 break; 3562 3563 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 3564 hci_event_io_capability_response_get_bd_addr(packet, addr); 3565 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3566 if (!conn) break; 3567 3568 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 3569 hci_pairing_started(conn, true); 3570 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 3571 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 3572 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3573 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 3574 #endif 3575 break; 3576 3577 case HCI_EVENT_IO_CAPABILITY_REQUEST: 3578 hci_event_io_capability_response_get_bd_addr(packet, addr); 3579 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3580 if (!conn) break; 3581 3582 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 3583 hci_connection_timestamp(conn); 3584 hci_pairing_started(conn, true); 3585 break; 3586 3587 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3588 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 3589 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 3590 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3591 if (!conn) break; 3592 3593 hci_connection_timestamp(conn); 3594 3595 hci_pairing_started(conn, true); 3596 3597 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 3598 break; 3599 #endif 3600 3601 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 3602 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 3603 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3604 if (!conn) break; 3605 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 3606 if (hci_stack->ssp_auto_accept){ 3607 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 3608 }; 3609 } else { 3610 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 3611 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 3612 // don't forward event to app 3613 hci_run(); 3614 return; 3615 } 3616 break; 3617 3618 case HCI_EVENT_USER_PASSKEY_REQUEST: 3619 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 3620 if (hci_stack->ssp_auto_accept){ 3621 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3622 }; 3623 break; 3624 3625 case HCI_EVENT_MODE_CHANGE: 3626 handle = hci_event_mode_change_get_handle(packet); 3627 conn = hci_connection_for_handle(handle); 3628 if (!conn) break; 3629 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3630 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3631 break; 3632 #endif 3633 3634 case HCI_EVENT_ENCRYPTION_CHANGE: 3635 case HCI_EVENT_ENCRYPTION_CHANGE_V2: 3636 handle = hci_event_encryption_change_get_connection_handle(packet); 3637 conn = hci_connection_for_handle(handle); 3638 if (!conn) break; 3639 if (hci_event_encryption_change_get_status(packet) == 0u) { 3640 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3641 if (encryption_enabled){ 3642 if (hci_is_le_connection(conn)){ 3643 // For LE, we accept connection as encrypted 3644 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3645 } 3646 #ifdef ENABLE_CLASSIC 3647 else { 3648 3649 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3650 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type); 3651 bool connected_uses_aes_ccm = encryption_enabled == 2; 3652 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3653 log_info("SC during pairing, but only E0 now -> abort"); 3654 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3655 break; 3656 } 3657 3658 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3659 if (connected_uses_aes_ccm){ 3660 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3661 } 3662 3663 #ifdef ENABLE_TESTING_SUPPORT 3664 // work around for issue with PTS dongle 3665 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3666 #endif 3667 // validate encryption key size 3668 if (hci_event_packet_get_type(packet) == HCI_EVENT_ENCRYPTION_CHANGE_V2) { 3669 uint8_t encryption_key_size = hci_event_encryption_change_v2_get_encryption_key_size(packet); 3670 // already got encryption key size 3671 hci_handle_read_encryption_key_size_complete(conn, encryption_key_size); 3672 } else { 3673 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_ENCRYPTION_KEY_SIZE)) { 3674 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3675 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3676 } else { 3677 // if not, pretend everything is perfect 3678 hci_handle_read_encryption_key_size_complete(conn, 16); 3679 } 3680 } 3681 } 3682 #endif 3683 } else { 3684 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3685 } 3686 } else { 3687 uint8_t status = hci_event_encryption_change_get_status(packet); 3688 if ((conn->bonding_flags & BONDING_DEDICATED) != 0){ 3689 conn->bonding_flags &= ~BONDING_DEDICATED; 3690 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3691 conn->bonding_status = status; 3692 } 3693 } 3694 3695 break; 3696 3697 #ifdef ENABLE_CLASSIC 3698 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3699 handle = hci_event_authentication_complete_get_connection_handle(packet); 3700 conn = hci_connection_for_handle(handle); 3701 if (!conn) break; 3702 3703 // clear authentication active flag 3704 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3705 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3706 3707 // authenticated only if auth status == 0 3708 if (hci_event_authentication_complete_get_status(packet) == 0){ 3709 // authenticated 3710 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3711 3712 // If not already encrypted, start encryption 3713 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3714 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3715 break; 3716 } 3717 } 3718 3719 // emit updated security level 3720 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3721 break; 3722 3723 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3724 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3725 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3726 if (!conn) break; 3727 3728 // treat successfully paired connection as authenticated 3729 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3730 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3731 } 3732 3733 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3734 break; 3735 #endif 3736 3737 // HCI_EVENT_DISCONNECTION_COMPLETE 3738 // has been split, to first notify stack before shutting connection down 3739 // see end of function, too. 3740 case HCI_EVENT_DISCONNECTION_COMPLETE: 3741 if (packet[2]) break; // status != 0 3742 handle = little_endian_read_16(packet, 3); 3743 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3744 if (hci_stack->acl_fragmentation_total_size > 0u) { 3745 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3746 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3747 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3748 hci_stack->acl_fragmentation_total_size = 0; 3749 hci_stack->acl_fragmentation_pos = 0; 3750 if (release_buffer){ 3751 hci_release_packet_buffer(); 3752 } 3753 } 3754 } 3755 3756 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3757 // drop outgoing ISO fragments if it is for closed connection and release buffer if tx not active 3758 if (hci_stack->iso_fragmentation_total_size > 0u) { 3759 if (handle == READ_ISO_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3760 int release_buffer = hci_stack->iso_fragmentation_tx_active == 0u; 3761 log_info("drop fragmented ISO data for closed connection, release buffer %u", release_buffer); 3762 hci_stack->iso_fragmentation_total_size = 0; 3763 hci_stack->iso_fragmentation_pos = 0; 3764 if (release_buffer){ 3765 hci_release_packet_buffer(); 3766 } 3767 } 3768 } 3769 3770 // finalize iso stream if handle matches 3771 iso_stream = hci_iso_stream_for_con_handle(handle); 3772 if (iso_stream != NULL){ 3773 hci_iso_stream_finalize(iso_stream); 3774 break; 3775 } 3776 #endif 3777 3778 conn = hci_connection_for_handle(handle); 3779 if (!conn) break; 3780 #ifdef ENABLE_CLASSIC 3781 // pairing failed if it was ongoing 3782 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3783 #endif 3784 3785 // emit dedicatd bonding event 3786 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3787 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3788 } 3789 3790 // mark connection for shutdown, stop timers, reset state 3791 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3792 hci_connection_stop_timer(conn); 3793 hci_connection_init(conn); 3794 3795 #ifdef ENABLE_BLE 3796 #ifdef ENABLE_LE_PERIPHERAL 3797 // re-enable advertisements for le connections if active 3798 if (hci_is_le_connection(conn)){ 3799 hci_update_advertisements_enabled_for_current_roles(); 3800 } 3801 #endif 3802 #endif 3803 break; 3804 3805 case HCI_EVENT_HARDWARE_ERROR: 3806 log_error("Hardware Error: 0x%02x", packet[2]); 3807 if (hci_stack->hardware_error_callback){ 3808 (*hci_stack->hardware_error_callback)(packet[2]); 3809 } else { 3810 // if no special requests, just reboot stack 3811 hci_power_control_off(); 3812 hci_power_control_on(); 3813 } 3814 break; 3815 3816 #ifdef ENABLE_CLASSIC 3817 case HCI_EVENT_ROLE_CHANGE: 3818 if (packet[2]) break; // status != 0 3819 reverse_bd_addr(&packet[3], addr); 3820 addr_type = BD_ADDR_TYPE_ACL; 3821 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3822 if (!conn) break; 3823 conn->role = packet[9]; 3824 break; 3825 #endif 3826 3827 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3828 // release packet buffer only for asynchronous transport and if there are not further fragments 3829 if (hci_transport_synchronous()) { 3830 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3831 return; // instead of break: to avoid re-entering hci_run() 3832 } 3833 hci_stack->acl_fragmentation_tx_active = 0; 3834 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3835 hci_stack->iso_fragmentation_tx_active = 0; 3836 if (hci_stack->iso_fragmentation_total_size) break; 3837 #endif 3838 if (hci_stack->acl_fragmentation_total_size) break; 3839 hci_release_packet_buffer(); 3840 3841 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3842 hci_iso_notify_can_send_now(); 3843 #endif 3844 // L2CAP receives this event via the hci_emit_event below 3845 3846 #ifdef ENABLE_CLASSIC 3847 // For SCO, we do the can_send_now_check here 3848 hci_notify_if_sco_can_send_now(); 3849 #endif 3850 break; 3851 3852 #ifdef ENABLE_CLASSIC 3853 case HCI_EVENT_SCO_CAN_SEND_NOW: 3854 // For SCO, we do the can_send_now_check here 3855 hci_stack->sco_can_send_now = true; 3856 hci_notify_if_sco_can_send_now(); 3857 return; 3858 3859 // explode inquriy results for easier consumption 3860 case HCI_EVENT_INQUIRY_RESULT: 3861 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3862 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3863 gap_inquiry_explode(packet, size); 3864 break; 3865 #endif 3866 3867 #ifdef ENABLE_BLE 3868 case HCI_EVENT_LE_META: 3869 switch (packet[2]){ 3870 #ifdef ENABLE_LE_CENTRAL 3871 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3872 if (!hci_stack->le_scanning_enabled) break; 3873 le_handle_advertisement_report(packet, size); 3874 break; 3875 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 3876 case HCI_SUBEVENT_LE_EXTENDED_ADVERTISING_REPORT: 3877 if (!hci_stack->le_scanning_enabled) break; 3878 le_handle_extended_advertisement_report(packet, size); 3879 break; 3880 case HCI_SUBEVENT_LE_PERIODIC_ADVERTISING_SYNC_ESTABLISHMENT: 3881 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 3882 hci_stack->le_periodic_sync_state = LE_CONNECTING_IDLE; 3883 break; 3884 #endif 3885 #endif 3886 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3887 event_handle_le_connection_complete(packet); 3888 break; 3889 3890 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3891 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3892 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3893 conn = hci_connection_for_handle(handle); 3894 if (!conn) break; 3895 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3896 break; 3897 3898 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3899 // connection 3900 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3901 conn = hci_connection_for_handle(handle); 3902 if (conn) { 3903 // read arguments 3904 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3905 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3906 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3907 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3908 3909 // validate against current connection parameter range 3910 le_connection_parameter_range_t existing_range; 3911 gap_get_connection_parameter_range(&existing_range); 3912 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3913 if (update_parameter){ 3914 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3915 conn->le_conn_interval_min = le_conn_interval_min; 3916 conn->le_conn_interval_max = le_conn_interval_max; 3917 conn->le_conn_latency = le_conn_latency; 3918 conn->le_supervision_timeout = le_supervision_timeout; 3919 } else { 3920 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3921 } 3922 } 3923 break; 3924 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3925 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3926 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3927 conn = hci_connection_for_handle(handle); 3928 if (conn) { 3929 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3930 } 3931 break; 3932 #endif 3933 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 3934 case HCI_SUBEVENT_LE_CIS_ESTABLISHED: 3935 handle = hci_subevent_le_cis_established_get_connection_handle(packet); 3936 iso_stream = hci_iso_stream_for_con_handle(handle); 3937 if (iso_stream){ 3938 uint8_t status = hci_subevent_le_cis_established_get_status(packet); 3939 if (status == ERROR_CODE_SUCCESS){ 3940 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3941 } else { 3942 hci_iso_stream_finalize(iso_stream); 3943 } 3944 } 3945 break; 3946 case HCI_SUBEVENT_LE_CREATE_BIG_COMPLETE: 3947 hci_stack->iso_active_operation_group_id = 0xff; 3948 big = hci_big_for_handle(packet[4]); 3949 if (big != NULL){ 3950 uint8_t status = packet[3]; 3951 if (status == ERROR_CODE_SUCCESS){ 3952 // store bis_con_handles and trigger iso path setup 3953 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[20]); 3954 uint8_t i; 3955 for (i=0;i<num_bis;i++){ 3956 hci_con_handle_t bis_handle = (hci_con_handle_t) little_endian_read_16(packet, 21 + (2 * i)); 3957 big->bis_con_handles[i] = bis_handle; 3958 // assign bis handle 3959 btstack_linked_list_iterator_t it; 3960 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 3961 while (btstack_linked_list_iterator_has_next(&it)){ 3962 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 3963 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 3964 (iso_stream->group_id == big->big_handle)){ 3965 iso_stream->con_handle = bis_handle; 3966 iso_stream->state = HCI_ISO_STREAM_STATE_ESTABLISHED; 3967 break; 3968 } 3969 } 3970 } 3971 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 3972 big->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 3973 big->state_vars.next_bis = 0; 3974 } 3975 } else { 3976 // create BIG failed or has been stopped by us 3977 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big->big_handle); 3978 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 3979 if (big->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED){ 3980 hci_emit_big_created(big, status); 3981 } else { 3982 hci_emit_big_terminated(big); 3983 } 3984 } 3985 } 3986 break; 3987 case HCI_SUBEVENT_LE_TERMINATE_BIG_COMPLETE: 3988 big = hci_big_for_handle(hci_subevent_le_terminate_big_complete_get_big_handle(packet)); 3989 if (big != NULL){ 3990 // finalize associated ISO streams 3991 btstack_linked_list_iterator_t it; 3992 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 3993 while (btstack_linked_list_iterator_has_next(&it)){ 3994 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 3995 if (iso_stream->group_id == big->big_handle){ 3996 log_info("BIG Terminated, big_handle 0x%02x, con handle 0x%04x", iso_stream->group_id, iso_stream->con_handle); 3997 btstack_linked_list_iterator_remove(&it); 3998 btstack_memory_hci_iso_stream_free(iso_stream); 3999 } 4000 } 4001 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 4002 switch (big->state){ 4003 case LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED: 4004 hci_emit_big_created(big, big->state_vars.status); 4005 break; 4006 default: 4007 hci_emit_big_terminated(big); 4008 break; 4009 } 4010 } 4011 break; 4012 case HCI_SUBEVENT_LE_BIG_SYNC_ESTABLISHED: 4013 big_sync = hci_big_sync_for_handle(packet[4]); 4014 if (big_sync != NULL){ 4015 uint8_t status = packet[3]; 4016 uint8_t big_handle = packet[4]; 4017 if (status == ERROR_CODE_SUCCESS){ 4018 // store bis_con_handles and trigger iso path setup 4019 uint8_t num_bis = btstack_min(MAX_NR_BIS, packet[16]); 4020 uint8_t i; 4021 for (i=0;i<num_bis;i++){ 4022 big_sync->bis_con_handles[i] = little_endian_read_16(packet, 17 + (2 * i)); 4023 } 4024 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4025 // trigger iso path setup 4026 big_sync->state = LE_AUDIO_BIG_STATE_SETUP_ISO_PATH; 4027 big_sync->state_vars.next_bis = 0; 4028 } 4029 } else { 4030 // create BIG Sync failed or has been stopped by us 4031 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4032 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_ESTABLISHED) { 4033 hci_emit_big_sync_created(big_sync, status); 4034 } else { 4035 hci_emit_big_sync_stopped(big_handle); 4036 } 4037 } 4038 } 4039 break; 4040 case HCI_SUBEVENT_LE_BIG_SYNC_LOST: 4041 big_sync = hci_big_sync_for_handle(packet[4]); 4042 if (big_sync != NULL){ 4043 uint8_t big_handle = packet[4]; 4044 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 4045 hci_emit_big_sync_stopped(big_handle); 4046 } 4047 break; 4048 #endif 4049 default: 4050 break; 4051 } 4052 break; 4053 #endif 4054 case HCI_EVENT_VENDOR_SPECIFIC: 4055 // Vendor specific commands often create vendor specific event instead of num completed packets 4056 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 4057 switch (hci_stack->manufacturer){ 4058 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 4059 hci_stack->num_cmd_packets = 1; 4060 break; 4061 default: 4062 break; 4063 } 4064 break; 4065 default: 4066 break; 4067 } 4068 4069 handle_event_for_current_stack_state(packet, size); 4070 4071 // notify upper stack 4072 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 4073 4074 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 4075 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 4076 handle = little_endian_read_16(packet, 3); 4077 hci_connection_t * aConn = hci_connection_for_handle(handle); 4078 // discard connection if app did not trigger a reconnect in the event handler 4079 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 4080 hci_shutdown_connection(aConn); 4081 } 4082 #ifdef ENABLE_CONTROLLER_DUMP_PACKETS 4083 hci_controller_dump_packets(); 4084 #endif 4085 } 4086 4087 // execute main loop 4088 hci_run(); 4089 } 4090 4091 #ifdef ENABLE_CLASSIC 4092 4093 #ifdef ENABLE_SCO_OVER_HCI 4094 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 4095 static void sco_schedule_tx(hci_connection_t * conn); 4096 4097 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 4098 log_debug("SCO TX Timeout"); 4099 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 4100 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4101 if (!conn) return; 4102 4103 // trigger send 4104 conn->sco_tx_ready = 1; 4105 // extra packet if CVSD but SCO buffer is too short 4106 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 4107 conn->sco_tx_ready++; 4108 } 4109 hci_notify_if_sco_can_send_now(); 4110 } 4111 4112 4113 #define SCO_TX_AFTER_RX_MS (6) 4114 4115 static void sco_schedule_tx(hci_connection_t * conn){ 4116 4117 uint32_t now = btstack_run_loop_get_time_ms(); 4118 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 4119 int time_delta_ms = sco_tx_ms - now; 4120 4121 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 4122 4123 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 4124 btstack_run_loop_remove_timer(timer); 4125 btstack_run_loop_set_timer(timer, time_delta_ms); 4126 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 4127 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 4128 btstack_run_loop_add_timer(timer); 4129 } 4130 #endif 4131 4132 static void sco_handler(uint8_t * packet, uint16_t size){ 4133 // lookup connection struct 4134 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 4135 hci_connection_t * conn = hci_connection_for_handle(con_handle); 4136 if (!conn) return; 4137 4138 #ifdef ENABLE_SCO_OVER_HCI 4139 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 4140 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 4141 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 4142 packet[2] = 0x3c; 4143 memmove(&packet[3], &packet[23], 63); 4144 size = 63; 4145 } 4146 } 4147 4148 if (hci_have_usb_transport()){ 4149 // Nothing to do 4150 } else { 4151 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 4152 if (hci_stack->synchronous_flow_control_enabled == 0){ 4153 uint32_t now = btstack_run_loop_get_time_ms(); 4154 4155 if (!conn->sco_rx_valid){ 4156 // ignore first 10 packets 4157 conn->sco_rx_count++; 4158 // log_debug("sco rx count %u", conn->sco_rx_count); 4159 if (conn->sco_rx_count == 10) { 4160 // use first timestamp as is and pretent it just started 4161 conn->sco_rx_ms = now; 4162 conn->sco_rx_valid = 1; 4163 conn->sco_rx_count = 0; 4164 sco_schedule_tx(conn); 4165 } 4166 } else { 4167 // track expected arrival timme 4168 conn->sco_rx_count++; 4169 conn->sco_rx_ms += 7; 4170 int delta = (int32_t) (now - conn->sco_rx_ms); 4171 if (delta > 0){ 4172 conn->sco_rx_ms++; 4173 } 4174 // log_debug("sco rx %u", conn->sco_rx_ms); 4175 sco_schedule_tx(conn); 4176 } 4177 } 4178 } 4179 #endif 4180 4181 // deliver to app 4182 if (hci_stack->sco_packet_handler) { 4183 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 4184 } 4185 4186 #ifdef HAVE_SCO_TRANSPORT 4187 // We can send one packet for each received packet 4188 conn->sco_tx_ready++; 4189 hci_notify_if_sco_can_send_now(); 4190 #endif 4191 4192 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4193 conn->num_packets_completed++; 4194 hci_stack->host_completed_packets = 1; 4195 hci_run(); 4196 #endif 4197 } 4198 #endif 4199 4200 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 4201 hci_dump_packet(packet_type, 1, packet, size); 4202 switch (packet_type) { 4203 case HCI_EVENT_PACKET: 4204 event_handler(packet, size); 4205 break; 4206 case HCI_ACL_DATA_PACKET: 4207 acl_handler(packet, size); 4208 break; 4209 #ifdef ENABLE_CLASSIC 4210 case HCI_SCO_DATA_PACKET: 4211 sco_handler(packet, size); 4212 break; 4213 #endif 4214 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4215 case HCI_ISO_DATA_PACKET: 4216 hci_iso_packet_handler(packet, size); 4217 break; 4218 #endif 4219 default: 4220 break; 4221 } 4222 } 4223 4224 /** 4225 * @brief Add event packet handler. 4226 */ 4227 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4228 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4229 } 4230 4231 /** 4232 * @brief Remove event packet handler. 4233 */ 4234 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 4235 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 4236 } 4237 4238 /** Register HCI packet handlers */ 4239 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 4240 hci_stack->acl_packet_handler = handler; 4241 } 4242 4243 #ifdef ENABLE_CLASSIC 4244 /** 4245 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 4246 */ 4247 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 4248 hci_stack->sco_packet_handler = handler; 4249 } 4250 #endif 4251 4252 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4253 void hci_register_iso_packet_handler(btstack_packet_handler_t handler){ 4254 hci_stack->iso_packet_handler = handler; 4255 } 4256 #endif 4257 4258 static void hci_state_reset(void){ 4259 // no connections yet 4260 hci_stack->connections = NULL; 4261 4262 // keep discoverable/connectable as this has been requested by the client(s) 4263 // hci_stack->discoverable = 0; 4264 // hci_stack->connectable = 0; 4265 // hci_stack->bondable = 1; 4266 // hci_stack->own_addr_type = 0; 4267 4268 // buffer is free 4269 hci_stack->hci_packet_buffer_reserved = false; 4270 4271 // no pending cmds 4272 hci_stack->decline_reason = 0; 4273 4274 hci_stack->secure_connections_active = false; 4275 4276 #ifdef ENABLE_CLASSIC 4277 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 4278 hci_stack->page_timeout = 0x6000; // ca. 15 sec 4279 4280 hci_stack->gap_tasks_classic = 4281 GAP_TASK_SET_DEFAULT_LINK_POLICY | 4282 GAP_TASK_SET_CLASS_OF_DEVICE | 4283 GAP_TASK_SET_LOCAL_NAME | 4284 GAP_TASK_SET_EIR_DATA | 4285 GAP_TASK_WRITE_SCAN_ENABLE | 4286 GAP_TASK_WRITE_PAGE_TIMEOUT; 4287 #endif 4288 4289 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4290 hci_stack->classic_read_local_oob_data = false; 4291 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 4292 #endif 4293 4294 // LE 4295 #ifdef ENABLE_BLE 4296 memset(hci_stack->le_random_address, 0, 6); 4297 hci_stack->le_random_address_set = 0; 4298 #endif 4299 #ifdef ENABLE_LE_CENTRAL 4300 hci_stack->le_scanning_active = false; 4301 hci_stack->le_scanning_param_update = true; 4302 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 4303 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 4304 hci_stack->le_whitelist_capacity = 0; 4305 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4306 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 4307 #endif 4308 #endif 4309 #ifdef ENABLE_LE_PERIPHERAL 4310 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4311 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_PARAMS_SET) != 0){ 4312 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4313 } 4314 if (hci_stack->le_advertisements_data != NULL){ 4315 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4316 } 4317 #endif 4318 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4319 hci_stack->iso_active_operation_group_id = 0xff; 4320 #endif 4321 } 4322 4323 #ifdef ENABLE_CLASSIC 4324 /** 4325 * @brief Configure Bluetooth hardware control. Has to be called before power on. 4326 */ 4327 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 4328 // store and open remote device db 4329 hci_stack->link_key_db = link_key_db; 4330 if (hci_stack->link_key_db) { 4331 hci_stack->link_key_db->open(); 4332 } 4333 } 4334 #endif 4335 4336 void hci_init(const hci_transport_t *transport, const void *config){ 4337 4338 #ifdef HAVE_MALLOC 4339 if (!hci_stack) { 4340 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 4341 } 4342 #else 4343 hci_stack = &hci_stack_static; 4344 #endif 4345 memset(hci_stack, 0, sizeof(hci_stack_t)); 4346 4347 // reference to use transport layer implementation 4348 hci_stack->hci_transport = transport; 4349 4350 // reference to used config 4351 hci_stack->config = config; 4352 4353 // setup pointer for outgoing packet buffer 4354 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 4355 4356 // max acl payload size defined in config.h 4357 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 4358 4359 // register packet handlers with transport 4360 transport->register_packet_handler(&packet_handler); 4361 4362 hci_stack->state = HCI_STATE_OFF; 4363 4364 // class of device 4365 hci_stack->class_of_device = 0x007a020c; // Smartphone 4366 4367 // bondable by default 4368 hci_stack->bondable = 1; 4369 4370 #ifdef ENABLE_CLASSIC 4371 // classic name 4372 hci_stack->local_name = default_classic_name; 4373 4374 // Master slave policy 4375 hci_stack->master_slave_policy = 1; 4376 4377 // Allow Role Switch 4378 hci_stack->allow_role_switch = 1; 4379 4380 // Default / minimum security level = 2 4381 hci_stack->gap_security_level = LEVEL_2; 4382 4383 // Default Security Mode 4 4384 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 4385 4386 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 4387 hci_stack->gap_required_encyrption_key_size = 7; 4388 4389 // Link Supervision Timeout 4390 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 4391 4392 #endif 4393 4394 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 4395 hci_stack->ssp_enable = 1; 4396 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 4397 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4398 hci_stack->ssp_auto_accept = 1; 4399 4400 // Secure Connections: enable (requires support from Controller) 4401 hci_stack->secure_connections_enable = true; 4402 4403 // voice setting - signed 16 bit pcm data with CVSD over the air 4404 hci_stack->sco_voice_setting = 0x60; 4405 4406 #ifdef ENABLE_LE_CENTRAL 4407 // connection parameter to use for outgoing connections 4408 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 4409 hci_stack->le_connection_scan_window = 0x0030; // 30ms 4410 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 4411 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 4412 hci_stack->le_connection_latency = 4; // 4 4413 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 4414 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 4415 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 4416 4417 // default LE Scanning 4418 hci_stack->le_scan_type = 0x1; // active 4419 hci_stack->le_scan_interval = 0x1e0; // 300 ms 4420 hci_stack->le_scan_window = 0x30; // 30 ms 4421 #endif 4422 4423 #ifdef ENABLE_LE_PERIPHERAL 4424 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 4425 #endif 4426 4427 // connection parameter range used to answer connection parameter update requests in l2cap 4428 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 4429 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 4430 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 4431 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 4432 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 4433 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 4434 4435 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4436 hci_stack->iso_packets_to_queue = 1; 4437 #endif 4438 4439 hci_state_reset(); 4440 } 4441 4442 void hci_deinit(void){ 4443 btstack_run_loop_remove_timer(&hci_stack->timeout); 4444 #ifdef HAVE_MALLOC 4445 if (hci_stack) { 4446 free(hci_stack); 4447 } 4448 #endif 4449 hci_stack = NULL; 4450 4451 #ifdef ENABLE_CLASSIC 4452 disable_l2cap_timeouts = 0; 4453 #endif 4454 } 4455 4456 /** 4457 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 4458 */ 4459 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 4460 hci_stack->chipset = chipset_driver; 4461 4462 // reset chipset driver - init is also called on power_up 4463 if (hci_stack->chipset && hci_stack->chipset->init){ 4464 hci_stack->chipset->init(hci_stack->config); 4465 } 4466 } 4467 4468 /** 4469 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 4470 */ 4471 void hci_set_control(const btstack_control_t *hardware_control){ 4472 // references to used control implementation 4473 hci_stack->control = hardware_control; 4474 // init with transport config 4475 hardware_control->init(hci_stack->config); 4476 } 4477 4478 static void hci_discard_connections(void){ 4479 btstack_linked_list_iterator_t it; 4480 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 4481 while (btstack_linked_list_iterator_has_next(&it)){ 4482 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 4483 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 4484 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 4485 hci_shutdown_connection(connection); 4486 } 4487 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 4488 while (hci_stack->iso_streams != NULL){ 4489 hci_iso_stream_finalize((hci_iso_stream_t *) hci_stack->iso_streams); 4490 } 4491 #endif 4492 } 4493 4494 void hci_close(void){ 4495 4496 #ifdef ENABLE_CLASSIC 4497 // close remote device db 4498 if (hci_stack->link_key_db) { 4499 hci_stack->link_key_db->close(); 4500 } 4501 #endif 4502 4503 hci_discard_connections(); 4504 4505 hci_power_control(HCI_POWER_OFF); 4506 4507 #ifdef HAVE_MALLOC 4508 free(hci_stack); 4509 #endif 4510 hci_stack = NULL; 4511 } 4512 4513 #ifdef HAVE_SCO_TRANSPORT 4514 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 4515 hci_stack->sco_transport = sco_transport; 4516 sco_transport->register_packet_handler(&packet_handler); 4517 } 4518 #endif 4519 4520 #ifdef ENABLE_CLASSIC 4521 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 4522 // validate ranage and set 4523 if (encryption_key_size < 7) return; 4524 if (encryption_key_size > 16) return; 4525 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 4526 } 4527 4528 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 4529 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 4530 hci_stack->gap_security_mode = security_mode; 4531 return ERROR_CODE_SUCCESS; 4532 } else { 4533 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 4534 } 4535 } 4536 4537 gap_security_mode_t gap_get_security_mode(void){ 4538 return hci_stack->gap_security_mode; 4539 } 4540 4541 void gap_set_security_level(gap_security_level_t security_level){ 4542 hci_stack->gap_security_level = security_level; 4543 } 4544 4545 gap_security_level_t gap_get_security_level(void){ 4546 if (hci_stack->gap_secure_connections_only_mode){ 4547 return LEVEL_4; 4548 } 4549 return hci_stack->gap_security_level; 4550 } 4551 4552 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 4553 hci_stack->gap_minimal_service_security_level = security_level; 4554 } 4555 4556 void gap_set_secure_connections_only_mode(bool enable){ 4557 hci_stack->gap_secure_connections_only_mode = enable; 4558 } 4559 4560 bool gap_get_secure_connections_only_mode(void){ 4561 return hci_stack->gap_secure_connections_only_mode; 4562 } 4563 #endif 4564 4565 #ifdef ENABLE_CLASSIC 4566 void gap_set_class_of_device(uint32_t class_of_device){ 4567 hci_stack->class_of_device = class_of_device; 4568 hci_stack->gap_tasks_classic |= GAP_TASK_SET_CLASS_OF_DEVICE; 4569 hci_run(); 4570 } 4571 4572 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 4573 hci_stack->default_link_policy_settings = default_link_policy_settings; 4574 hci_stack->gap_tasks_classic |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 4575 hci_run(); 4576 } 4577 4578 void gap_set_allow_role_switch(bool allow_role_switch){ 4579 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 4580 } 4581 4582 uint8_t hci_get_allow_role_switch(void){ 4583 return hci_stack->allow_role_switch; 4584 } 4585 4586 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 4587 hci_stack->link_supervision_timeout = link_supervision_timeout; 4588 } 4589 4590 void gap_enable_link_watchdog(uint16_t timeout_ms){ 4591 hci_stack->automatic_flush_timeout = btstack_min(timeout_ms, 1280) * 8 / 5; // divide by 0.625 4592 } 4593 4594 uint16_t hci_automatic_flush_timeout(void){ 4595 return hci_stack->automatic_flush_timeout; 4596 } 4597 4598 void hci_disable_l2cap_timeout_check(void){ 4599 disable_l2cap_timeouts = 1; 4600 } 4601 #endif 4602 4603 #ifndef HAVE_HOST_CONTROLLER_API 4604 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 4605 void hci_set_bd_addr(bd_addr_t addr){ 4606 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 4607 hci_stack->custom_bd_addr_set = 1; 4608 } 4609 #endif 4610 4611 // State-Module-Driver overview 4612 // state module low-level 4613 // HCI_STATE_OFF off close 4614 // HCI_STATE_INITIALIZING, on open 4615 // HCI_STATE_WORKING, on open 4616 // HCI_STATE_HALTING, on open 4617 // HCI_STATE_SLEEPING, off/sleep close 4618 // HCI_STATE_FALLING_ASLEEP on open 4619 4620 static int hci_power_control_on(void){ 4621 4622 // power on 4623 int err = 0; 4624 if (hci_stack->control && hci_stack->control->on){ 4625 err = (*hci_stack->control->on)(); 4626 } 4627 if (err){ 4628 log_error( "POWER_ON failed"); 4629 hci_emit_hci_open_failed(); 4630 return err; 4631 } 4632 4633 // int chipset driver 4634 if (hci_stack->chipset && hci_stack->chipset->init){ 4635 hci_stack->chipset->init(hci_stack->config); 4636 } 4637 4638 // init transport 4639 if (hci_stack->hci_transport->init){ 4640 hci_stack->hci_transport->init(hci_stack->config); 4641 } 4642 4643 // open transport 4644 err = hci_stack->hci_transport->open(); 4645 if (err){ 4646 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4647 if (hci_stack->control && hci_stack->control->off){ 4648 (*hci_stack->control->off)(); 4649 } 4650 hci_emit_hci_open_failed(); 4651 return err; 4652 } 4653 return 0; 4654 } 4655 4656 static void hci_power_control_off(void){ 4657 4658 log_info("hci_power_control_off"); 4659 4660 // close low-level device 4661 hci_stack->hci_transport->close(); 4662 4663 log_info("hci_power_control_off - hci_transport closed"); 4664 4665 // power off 4666 if (hci_stack->control && hci_stack->control->off){ 4667 (*hci_stack->control->off)(); 4668 } 4669 4670 log_info("hci_power_control_off - control closed"); 4671 4672 hci_stack->state = HCI_STATE_OFF; 4673 } 4674 4675 static void hci_power_control_sleep(void){ 4676 4677 log_info("hci_power_control_sleep"); 4678 4679 #if 0 4680 // don't close serial port during sleep 4681 4682 // close low-level device 4683 hci_stack->hci_transport->close(hci_stack->config); 4684 #endif 4685 4686 // sleep mode 4687 if (hci_stack->control && hci_stack->control->sleep){ 4688 (*hci_stack->control->sleep)(); 4689 } 4690 4691 hci_stack->state = HCI_STATE_SLEEPING; 4692 } 4693 4694 static int hci_power_control_wake(void){ 4695 4696 log_info("hci_power_control_wake"); 4697 4698 // wake on 4699 if (hci_stack->control && hci_stack->control->wake){ 4700 (*hci_stack->control->wake)(); 4701 } 4702 4703 #if 0 4704 // open low-level device 4705 int err = hci_stack->hci_transport->open(hci_stack->config); 4706 if (err){ 4707 log_error( "HCI_INIT failed, turning Bluetooth off again"); 4708 if (hci_stack->control && hci_stack->control->off){ 4709 (*hci_stack->control->off)(); 4710 } 4711 hci_emit_hci_open_failed(); 4712 return err; 4713 } 4714 #endif 4715 4716 return 0; 4717 } 4718 4719 static void hci_power_enter_initializing_state(void){ 4720 // set up state machine 4721 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 4722 hci_stack->hci_packet_buffer_reserved = false; 4723 hci_stack->state = HCI_STATE_INITIALIZING; 4724 hci_stack->substate = HCI_INIT_SEND_RESET; 4725 } 4726 4727 static void hci_power_enter_halting_state(void){ 4728 #ifdef ENABLE_BLE 4729 hci_whitelist_free(); 4730 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4731 hci_periodic_advertiser_list_free(); 4732 #endif 4733 #endif 4734 // see hci_run 4735 hci_stack->state = HCI_STATE_HALTING; 4736 hci_stack->substate = HCI_HALTING_CLASSIC_STOP; 4737 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 4738 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 4739 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4740 btstack_run_loop_add_timer(&hci_stack->timeout); 4741 } 4742 4743 // returns error 4744 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 4745 int err; 4746 switch (power_mode){ 4747 case HCI_POWER_ON: 4748 err = hci_power_control_on(); 4749 if (err != 0) { 4750 log_error("hci_power_control_on() error %d", err); 4751 return err; 4752 } 4753 hci_power_enter_initializing_state(); 4754 break; 4755 case HCI_POWER_OFF: 4756 // do nothing 4757 break; 4758 case HCI_POWER_SLEEP: 4759 // do nothing (with SLEEP == OFF) 4760 break; 4761 default: 4762 btstack_assert(false); 4763 break; 4764 } 4765 return ERROR_CODE_SUCCESS; 4766 } 4767 4768 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 4769 switch (power_mode){ 4770 case HCI_POWER_ON: 4771 // do nothing 4772 break; 4773 case HCI_POWER_OFF: 4774 // no connections yet, just turn it off 4775 hci_power_control_off(); 4776 break; 4777 case HCI_POWER_SLEEP: 4778 // no connections yet, just turn it off 4779 hci_power_control_sleep(); 4780 break; 4781 default: 4782 btstack_assert(false); 4783 break; 4784 } 4785 return ERROR_CODE_SUCCESS; 4786 } 4787 4788 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 4789 switch (power_mode){ 4790 case HCI_POWER_ON: 4791 // do nothing 4792 break; 4793 case HCI_POWER_OFF: 4794 hci_power_enter_halting_state(); 4795 break; 4796 case HCI_POWER_SLEEP: 4797 // see hci_run 4798 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4799 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4800 break; 4801 default: 4802 btstack_assert(false); 4803 break; 4804 } 4805 return ERROR_CODE_SUCCESS; 4806 } 4807 4808 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 4809 switch (power_mode){ 4810 case HCI_POWER_ON: 4811 hci_power_enter_initializing_state(); 4812 break; 4813 case HCI_POWER_OFF: 4814 // do nothing 4815 break; 4816 case HCI_POWER_SLEEP: 4817 // see hci_run 4818 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 4819 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 4820 break; 4821 default: 4822 btstack_assert(false); 4823 break; 4824 } 4825 return ERROR_CODE_SUCCESS; 4826 } 4827 4828 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 4829 switch (power_mode){ 4830 case HCI_POWER_ON: 4831 hci_power_enter_initializing_state(); 4832 break; 4833 case HCI_POWER_OFF: 4834 hci_power_enter_halting_state(); 4835 break; 4836 case HCI_POWER_SLEEP: 4837 // do nothing 4838 break; 4839 default: 4840 btstack_assert(false); 4841 break; 4842 } 4843 return ERROR_CODE_SUCCESS; 4844 } 4845 4846 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4847 int err; 4848 switch (power_mode){ 4849 case HCI_POWER_ON: 4850 err = hci_power_control_wake(); 4851 if (err) return err; 4852 hci_power_enter_initializing_state(); 4853 break; 4854 case HCI_POWER_OFF: 4855 hci_power_enter_halting_state(); 4856 break; 4857 case HCI_POWER_SLEEP: 4858 // do nothing 4859 break; 4860 default: 4861 btstack_assert(false); 4862 break; 4863 } 4864 return ERROR_CODE_SUCCESS; 4865 } 4866 4867 int hci_power_control(HCI_POWER_MODE power_mode){ 4868 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4869 int err = 0; 4870 switch (hci_stack->state){ 4871 case HCI_STATE_OFF: 4872 err = hci_power_control_state_off(power_mode); 4873 break; 4874 case HCI_STATE_INITIALIZING: 4875 err = hci_power_control_state_initializing(power_mode); 4876 break; 4877 case HCI_STATE_WORKING: 4878 err = hci_power_control_state_working(power_mode); 4879 break; 4880 case HCI_STATE_HALTING: 4881 err = hci_power_control_state_halting(power_mode); 4882 break; 4883 case HCI_STATE_FALLING_ASLEEP: 4884 err = hci_power_control_state_falling_asleep(power_mode); 4885 break; 4886 case HCI_STATE_SLEEPING: 4887 err = hci_power_control_state_sleeping(power_mode); 4888 break; 4889 default: 4890 btstack_assert(false); 4891 break; 4892 } 4893 if (err != 0){ 4894 return err; 4895 } 4896 4897 // create internal event 4898 hci_emit_state(); 4899 4900 // trigger next/first action 4901 hci_run(); 4902 4903 return 0; 4904 } 4905 4906 4907 static void hci_halting_run(void) { 4908 4909 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4910 4911 hci_connection_t *connection; 4912 #ifdef ENABLE_BLE 4913 #ifdef ENABLE_LE_PERIPHERAL 4914 bool stop_advertismenets; 4915 #endif 4916 #endif 4917 4918 switch (hci_stack->substate) { 4919 case HCI_HALTING_CLASSIC_STOP: 4920 #ifdef ENABLE_CLASSIC 4921 if (!hci_can_send_command_packet_now()) return; 4922 4923 if (hci_stack->connectable || hci_stack->discoverable){ 4924 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4925 hci_send_cmd(&hci_write_scan_enable, 0); 4926 return; 4927 } 4928 #endif 4929 /* fall through */ 4930 4931 case HCI_HALTING_LE_ADV_STOP: 4932 hci_stack->substate = HCI_HALTING_LE_ADV_STOP; 4933 4934 #ifdef ENABLE_BLE 4935 #ifdef ENABLE_LE_PERIPHERAL 4936 if (!hci_can_send_command_packet_now()) return; 4937 4938 stop_advertismenets = (hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0; 4939 4940 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 4941 if (hci_extended_advertising_supported()){ 4942 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 4943 btstack_linked_list_iterator_t it; 4944 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 4945 // stop all periodic advertisements and check if an extended set is active 4946 while (btstack_linked_list_iterator_has_next(&it)){ 4947 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 4948 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 4949 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 4950 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_set->advertising_handle); 4951 return; 4952 } 4953 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 4954 stop_advertismenets = true; 4955 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4956 } 4957 } 4958 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 4959 if (stop_advertismenets){ 4960 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4961 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 0, NULL, NULL, NULL); 4962 return; 4963 } 4964 } 4965 else 4966 #else /* ENABLE_LE_PERIPHERAL */ 4967 { 4968 if (stop_advertismenets) { 4969 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 4970 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4971 return; 4972 } 4973 } 4974 #endif /* ENABLE_LE_EXTENDED_ADVERTISING*/ 4975 #endif /* ENABLE_LE_PERIPHERAL */ 4976 #endif /* ENABLE_BLE */ 4977 4978 /* fall through */ 4979 4980 case HCI_HALTING_LE_SCAN_STOP: 4981 hci_stack->substate = HCI_HALTING_LE_SCAN_STOP; 4982 if (!hci_can_send_command_packet_now()) return; 4983 4984 #ifdef ENABLE_BLE 4985 #ifdef ENABLE_LE_CENTRAL 4986 if (hci_stack->le_scanning_active){ 4987 hci_le_scan_stop(); 4988 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4989 return; 4990 } 4991 #endif 4992 #endif 4993 4994 /* fall through */ 4995 4996 case HCI_HALTING_DISCONNECT_ALL: 4997 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL; 4998 if (!hci_can_send_command_packet_now()) return; 4999 5000 // close all open connections 5001 connection = (hci_connection_t *) hci_stack->connections; 5002 if (connection) { 5003 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5004 5005 // check state 5006 if (connection->state == SENT_DISCONNECT) return; 5007 connection->state = SENT_DISCONNECT; 5008 5009 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5010 5011 // finally, send the disconnect command 5012 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5013 return; 5014 } 5015 5016 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5017 // stop BIGs and BIG Syncs 5018 if (hci_stack->le_audio_bigs != NULL){ 5019 le_audio_big_t * big = (le_audio_big_t*) hci_stack->le_audio_bigs; 5020 if (big->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5021 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5022 hci_send_cmd(&hci_le_terminate_big, big->big_handle); 5023 return; 5024 } 5025 if (hci_stack->le_audio_big_syncs != NULL){ 5026 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t*) hci_stack->le_audio_big_syncs; 5027 if (big_sync->state == LE_AUDIO_BIG_STATE_W4_TERMINATED) return; 5028 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 5029 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 5030 return; 5031 } 5032 #endif 5033 5034 btstack_run_loop_remove_timer(&hci_stack->timeout); 5035 5036 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5037 log_info("HCI_STATE_HALTING: wait 50 ms"); 5038 hci_stack->substate = HCI_HALTING_W4_CLOSE_TIMER; 5039 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5040 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5041 btstack_run_loop_add_timer(&hci_stack->timeout); 5042 break; 5043 5044 case HCI_HALTING_CLOSE: 5045 // close left over connections (that had not been properly closed before) 5046 hci_discard_connections(); 5047 5048 log_info("HCI_STATE_HALTING, calling off"); 5049 5050 // switch mode 5051 hci_power_control_off(); 5052 5053 log_info("HCI_STATE_HALTING, emitting state"); 5054 hci_emit_state(); 5055 log_info("HCI_STATE_HALTING, done"); 5056 break; 5057 5058 case HCI_HALTING_W4_CLOSE_TIMER: 5059 // keep waiting 5060 5061 break; 5062 default: 5063 break; 5064 } 5065 }; 5066 5067 static void hci_falling_asleep_run(void){ 5068 hci_connection_t * connection; 5069 switch(hci_stack->substate) { 5070 case HCI_FALLING_ASLEEP_DISCONNECT: 5071 log_info("HCI_STATE_FALLING_ASLEEP"); 5072 // close all open connections 5073 connection = (hci_connection_t *) hci_stack->connections; 5074 if (connection){ 5075 5076 // send disconnect 5077 if (!hci_can_send_command_packet_now()) return; 5078 5079 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5080 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5081 5082 // send disconnected event right away - causes higher layer connections to get closed, too. 5083 hci_shutdown_connection(connection); 5084 return; 5085 } 5086 5087 if (hci_classic_supported()){ 5088 // disable page and inquiry scan 5089 if (!hci_can_send_command_packet_now()) return; 5090 5091 log_info("HCI_STATE_HALTING, disabling inq scans"); 5092 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5093 5094 // continue in next sub state 5095 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5096 break; 5097 } 5098 5099 /* fall through */ 5100 5101 case HCI_FALLING_ASLEEP_COMPLETE: 5102 log_info("HCI_STATE_HALTING, calling sleep"); 5103 // switch mode 5104 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5105 hci_emit_state(); 5106 break; 5107 5108 default: 5109 break; 5110 } 5111 } 5112 5113 #ifdef ENABLE_CLASSIC 5114 5115 static void hci_update_scan_enable(void){ 5116 // 2 = page scan, 1 = inq scan 5117 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 5118 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_SCAN_ENABLE; 5119 hci_run(); 5120 } 5121 5122 void gap_discoverable_control(uint8_t enable){ 5123 if (enable) enable = 1; // normalize argument 5124 5125 if (hci_stack->discoverable == enable){ 5126 hci_emit_scan_mode_changed(hci_stack->discoverable, hci_stack->connectable); 5127 return; 5128 } 5129 5130 hci_stack->discoverable = enable; 5131 hci_update_scan_enable(); 5132 } 5133 5134 void gap_connectable_control(uint8_t enable){ 5135 if (enable) enable = 1; // normalize argument 5136 5137 // don't emit event 5138 if (hci_stack->connectable == enable) return; 5139 5140 hci_stack->connectable = enable; 5141 hci_update_scan_enable(); 5142 } 5143 #endif 5144 5145 void gap_local_bd_addr(bd_addr_t address_buffer){ 5146 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 5147 } 5148 5149 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5150 static void hci_host_num_completed_packets(void){ 5151 5152 // create packet manually as arrays are not supported and num_commands should not get reduced 5153 hci_reserve_packet_buffer(); 5154 uint8_t * packet = hci_get_outgoing_packet_buffer(); 5155 5156 uint16_t size = 0; 5157 uint16_t num_handles = 0; 5158 packet[size++] = 0x35; 5159 packet[size++] = 0x0c; 5160 size++; // skip param len 5161 size++; // skip num handles 5162 5163 // add { handle, packets } entries 5164 btstack_linked_item_t * it; 5165 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 5166 hci_connection_t * connection = (hci_connection_t *) it; 5167 if (connection->num_packets_completed){ 5168 little_endian_store_16(packet, size, connection->con_handle); 5169 size += 2; 5170 little_endian_store_16(packet, size, connection->num_packets_completed); 5171 size += 2; 5172 // 5173 num_handles++; 5174 connection->num_packets_completed = 0; 5175 } 5176 } 5177 5178 packet[2] = size - 3; 5179 packet[3] = num_handles; 5180 5181 hci_stack->host_completed_packets = 0; 5182 5183 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5184 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5185 5186 // release packet buffer for synchronous transport implementations 5187 if (hci_transport_synchronous()){ 5188 hci_release_packet_buffer(); 5189 hci_emit_transport_packet_sent(); 5190 } 5191 } 5192 #endif 5193 5194 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 5195 UNUSED(ds); 5196 hci_stack->substate = HCI_HALTING_CLOSE; 5197 // allow packet handlers to defer final shutdown 5198 hci_emit_state(); 5199 hci_run(); 5200 } 5201 5202 static bool hci_run_acl_fragments(void){ 5203 if (hci_stack->acl_fragmentation_total_size > 0u) { 5204 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 5205 hci_connection_t *connection = hci_connection_for_handle(con_handle); 5206 if (connection) { 5207 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 5208 hci_send_acl_packet_fragments(connection); 5209 return true; 5210 } 5211 } else { 5212 // connection gone -> discard further fragments 5213 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 5214 hci_stack->acl_fragmentation_total_size = 0; 5215 hci_stack->acl_fragmentation_pos = 0; 5216 } 5217 } 5218 return false; 5219 } 5220 5221 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 5222 static bool hci_run_iso_fragments(void){ 5223 if (hci_stack->iso_fragmentation_total_size > 0u) { 5224 // TODO: flow control 5225 if (hci_transport_can_send_prepared_packet_now(HCI_ISO_DATA_PACKET)){ 5226 hci_send_iso_packet_fragments(); 5227 return true; 5228 } 5229 } 5230 return false; 5231 } 5232 #endif 5233 5234 #ifdef ENABLE_CLASSIC 5235 5236 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5237 static bool hci_classic_operation_active(void) { 5238 if (hci_stack->inquiry_state >= GAP_INQUIRY_STATE_W4_ACTIVE){ 5239 return true; 5240 } 5241 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 5242 return true; 5243 } 5244 btstack_linked_item_t * it; 5245 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next) { 5246 hci_connection_t *connection = (hci_connection_t *) it; 5247 switch (connection->state) { 5248 case SENT_CREATE_CONNECTION: 5249 case SENT_CANCEL_CONNECTION: 5250 case SENT_DISCONNECT: 5251 return true; 5252 default: 5253 break; 5254 } 5255 } 5256 return false; 5257 } 5258 #endif 5259 5260 static bool hci_run_general_gap_classic(void){ 5261 5262 // assert stack is working and classic is active 5263 if (hci_classic_supported() == false) return false; 5264 if (hci_stack->state != HCI_STATE_WORKING) return false; 5265 5266 // decline incoming connections 5267 if (hci_stack->decline_reason){ 5268 uint8_t reason = hci_stack->decline_reason; 5269 hci_stack->decline_reason = 0; 5270 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 5271 return true; 5272 } 5273 5274 if (hci_stack->gap_tasks_classic != 0){ 5275 hci_run_gap_tasks_classic(); 5276 return true; 5277 } 5278 5279 // start/stop inquiry 5280 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 5281 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5282 if (hci_classic_operation_active() == false) 5283 #endif 5284 { 5285 uint8_t duration = hci_stack->inquiry_state; 5286 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 5287 if (hci_stack->inquiry_max_period_length != 0){ 5288 hci_send_cmd(&hci_periodic_inquiry_mode, hci_stack->inquiry_max_period_length, hci_stack->inquiry_min_period_length, hci_stack->inquiry_lap, duration, 0); 5289 } else { 5290 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 5291 } 5292 return true; 5293 } 5294 } 5295 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 5296 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5297 hci_send_cmd(&hci_inquiry_cancel); 5298 return true; 5299 } 5300 5301 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_EXIT_PERIODIC){ 5302 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 5303 hci_send_cmd(&hci_exit_periodic_inquiry_mode); 5304 return true; 5305 } 5306 5307 // remote name request 5308 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 5309 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 5310 if (hci_classic_operation_active() == false) 5311 #endif 5312 { 5313 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 5314 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 5315 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 5316 return true; 5317 } 5318 } 5319 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5320 // Local OOB data 5321 if (hci_stack->classic_read_local_oob_data){ 5322 hci_stack->classic_read_local_oob_data = false; 5323 if (hci_command_supported(SUPPORTED_HCI_COMMAND_READ_LOCAL_OOB_EXTENDED_DATA_COMMAND)){ 5324 hci_send_cmd(&hci_read_local_extended_oob_data); 5325 } else { 5326 hci_send_cmd(&hci_read_local_oob_data); 5327 } 5328 } 5329 #endif 5330 // pairing 5331 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 5332 uint8_t state = hci_stack->gap_pairing_state; 5333 uint8_t pin_code[16]; 5334 switch (state){ 5335 case GAP_PAIRING_STATE_SEND_PIN: 5336 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5337 memset(pin_code, 0, 16); 5338 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 5339 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 5340 break; 5341 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 5342 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5343 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 5344 break; 5345 case GAP_PAIRING_STATE_SEND_PASSKEY: 5346 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5347 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 5348 break; 5349 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 5350 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5351 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 5352 break; 5353 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 5354 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 5355 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 5356 break; 5357 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 5358 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 5359 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 5360 break; 5361 default: 5362 break; 5363 } 5364 return true; 5365 } 5366 return false; 5367 } 5368 #endif 5369 5370 #ifdef ENABLE_BLE 5371 5372 #ifdef ENABLE_LE_CENTRAL 5373 static void hci_le_scan_stop(void){ 5374 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5375 if (hci_extended_advertising_supported()) { 5376 hci_send_cmd(&hci_le_set_extended_scan_enable, 0, 0, 0, 0); 5377 } else 5378 #endif 5379 { 5380 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 5381 } 5382 } 5383 #endif 5384 5385 #ifdef ENABLE_LE_PERIPHERAL 5386 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5387 uint8_t hci_le_extended_advertising_operation_for_chunk(uint16_t pos, uint16_t len){ 5388 uint8_t operation = 0; 5389 if (pos == 0){ 5390 // first fragment or complete data 5391 operation |= 1; 5392 } 5393 if (pos + LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN >= len){ 5394 // last fragment or complete data 5395 operation |= 2; 5396 } 5397 return operation; 5398 } 5399 #endif 5400 #endif 5401 5402 static bool hci_run_general_gap_le(void){ 5403 5404 btstack_linked_list_iterator_t lit; 5405 5406 // Phase 1: collect what to stop 5407 5408 #ifdef ENABLE_LE_CENTRAL 5409 bool scanning_stop = false; 5410 bool connecting_stop = false; 5411 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5412 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5413 bool periodic_sync_stop = false; 5414 #endif 5415 #endif 5416 #endif 5417 5418 #ifdef ENABLE_LE_PERIPHERAL 5419 bool advertising_stop = false; 5420 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5421 le_advertising_set_t * advertising_stop_set = NULL; 5422 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5423 bool periodic_advertising_stop = false; 5424 #endif 5425 #endif 5426 #endif 5427 5428 // check if own address changes 5429 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5430 5431 // check if whitelist needs modification 5432 bool whitelist_modification_pending = false; 5433 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5434 while (btstack_linked_list_iterator_has_next(&lit)){ 5435 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5436 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 5437 whitelist_modification_pending = true; 5438 break; 5439 } 5440 } 5441 5442 // check if resolving list needs modification 5443 bool resolving_list_modification_pending = false; 5444 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5445 bool resolving_list_supported = hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE); 5446 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 5447 resolving_list_modification_pending = true; 5448 } 5449 #endif 5450 5451 #ifdef ENABLE_LE_CENTRAL 5452 5453 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5454 // check if periodic advertiser list needs modification 5455 bool periodic_list_modification_pending = false; 5456 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 5457 while (btstack_linked_list_iterator_has_next(&lit)){ 5458 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 5459 if (entry->state & (LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER | LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER)){ 5460 periodic_list_modification_pending = true; 5461 break; 5462 } 5463 } 5464 #endif 5465 5466 // scanning control 5467 if (hci_stack->le_scanning_active) { 5468 // stop if: 5469 // - parameter change required 5470 // - it's disabled 5471 // - whitelist change required but used for scanning 5472 // - resolving list modified 5473 // - own address changes 5474 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 5475 if ((hci_stack->le_scanning_param_update) || 5476 !hci_stack->le_scanning_enabled || 5477 (scanning_uses_whitelist && whitelist_modification_pending) || 5478 resolving_list_modification_pending || 5479 random_address_change){ 5480 5481 scanning_stop = true; 5482 } 5483 } 5484 5485 // connecting control 5486 bool connecting_with_whitelist; 5487 switch (hci_stack->le_connecting_state){ 5488 case LE_CONNECTING_DIRECT: 5489 case LE_CONNECTING_WHITELIST: 5490 // stop connecting if: 5491 // - connecting uses white and whitelist modification pending 5492 // - if it got disabled 5493 // - resolving list modified 5494 // - own address changes 5495 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 5496 if ((connecting_with_whitelist && whitelist_modification_pending) || 5497 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 5498 resolving_list_modification_pending || 5499 random_address_change) { 5500 5501 connecting_stop = true; 5502 } 5503 break; 5504 default: 5505 break; 5506 } 5507 5508 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5509 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5510 // periodic sync control 5511 bool sync_with_advertiser_list; 5512 switch(hci_stack->le_periodic_sync_state){ 5513 case LE_CONNECTING_DIRECT: 5514 case LE_CONNECTING_WHITELIST: 5515 // stop sync if: 5516 // - sync with advertiser list and advertiser list modification pending 5517 // - if it got disabled 5518 sync_with_advertiser_list = hci_stack->le_periodic_sync_state == LE_CONNECTING_WHITELIST; 5519 if ((sync_with_advertiser_list && periodic_list_modification_pending) || 5520 (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE)){ 5521 periodic_sync_stop = true; 5522 } 5523 break; 5524 default: 5525 break; 5526 } 5527 #endif 5528 #endif 5529 5530 #endif /* ENABLE_LE_CENTRAL */ 5531 5532 #ifdef ENABLE_LE_PERIPHERAL 5533 // le advertisement control 5534 if ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0){ 5535 // stop if: 5536 // - parameter change required 5537 // - random address used in advertising and changes 5538 // - it's disabled 5539 // - whitelist change required but used for advertisement filter policy 5540 // - resolving list modified 5541 // - own address changes 5542 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 5543 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 5544 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5545 if (advertising_change || 5546 (advertising_uses_random_address && random_address_change) || 5547 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 5548 (advertising_uses_whitelist && whitelist_modification_pending) || 5549 resolving_list_modification_pending || 5550 random_address_change) { 5551 5552 advertising_stop = true; 5553 } 5554 } 5555 5556 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5557 if (hci_extended_advertising_supported() && (advertising_stop == false)){ 5558 btstack_linked_list_iterator_t it; 5559 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5560 while (btstack_linked_list_iterator_has_next(&it)){ 5561 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5562 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) != 0) { 5563 // stop if: 5564 // - parameter change required 5565 // - random address used in connectable advertising and changes 5566 // - it's disabled 5567 // - whitelist change required but used for advertisement filter policy 5568 // - resolving list modified 5569 // - own address changes 5570 // - advertisement set will be removed 5571 bool advertising_uses_whitelist = advertising_set->extended_params.advertising_filter_policy != 0; 5572 bool advertising_connectable = (advertising_set->extended_params.advertising_event_properties & 1) != 0; 5573 bool advertising_uses_random_address = 5574 (advertising_set->extended_params.own_address_type != BD_ADDR_TYPE_LE_PUBLIC) && 5575 advertising_connectable; 5576 bool advertising_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 5577 bool advertising_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0; 5578 bool advertising_set_random_address_change = 5579 (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 5580 bool advertising_set_will_be_removed = 5581 (advertising_set->state & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0; 5582 if (advertising_parameter_change || 5583 (advertising_uses_random_address && advertising_set_random_address_change) || 5584 (advertising_enabled == false) || 5585 (advertising_uses_whitelist && whitelist_modification_pending) || 5586 resolving_list_modification_pending || 5587 advertising_set_will_be_removed) { 5588 5589 advertising_stop = true; 5590 advertising_stop_set = advertising_set; 5591 break; 5592 } 5593 } 5594 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5595 if ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) != 0) { 5596 // stop if: 5597 // - it's disabled 5598 // - parameter change required 5599 bool periodic_enabled = (advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0; 5600 bool periodic_parameter_change = (advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0; 5601 if ((periodic_enabled == false) || periodic_parameter_change){ 5602 periodic_advertising_stop = true; 5603 advertising_stop_set = advertising_set; 5604 } 5605 } 5606 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5607 } 5608 } 5609 #endif 5610 5611 #endif 5612 5613 5614 // Phase 2: stop everything that should be off during modifications 5615 5616 5617 // 2.1 Outgoing connection 5618 #ifdef ENABLE_LE_CENTRAL 5619 if (connecting_stop){ 5620 hci_send_cmd(&hci_le_create_connection_cancel); 5621 return true; 5622 } 5623 #endif 5624 5625 // 2.2 Scanning 5626 #ifdef ENABLE_LE_CENTRAL 5627 if (scanning_stop){ 5628 hci_stack->le_scanning_active = false; 5629 hci_le_scan_stop(); 5630 return true; 5631 } 5632 5633 // 2.3 Periodic Sync 5634 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5635 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 5636 uint16_t sync_handle = hci_stack->le_periodic_terminate_sync_handle; 5637 hci_stack->le_periodic_terminate_sync_handle = HCI_CON_HANDLE_INVALID; 5638 hci_send_cmd(&hci_le_periodic_advertising_terminate_sync, sync_handle); 5639 return true; 5640 } 5641 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5642 if (periodic_sync_stop){ 5643 hci_stack->le_periodic_sync_state = LE_CONNECTING_CANCEL; 5644 hci_send_cmd(&hci_le_periodic_advertising_create_sync_cancel); 5645 return true; 5646 } 5647 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5648 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5649 #endif /* ENABLE_LE_CENTRAL */ 5650 5651 // 2.4 Advertising: legacy, extended, periodic 5652 #ifdef ENABLE_LE_PERIPHERAL 5653 if (advertising_stop){ 5654 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5655 if (hci_extended_advertising_supported()) { 5656 uint8_t advertising_stop_handle; 5657 if (advertising_stop_set != NULL){ 5658 advertising_stop_handle = advertising_stop_set->advertising_handle; 5659 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5660 } else { 5661 advertising_stop_handle = 0; 5662 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5663 } 5664 const uint8_t advertising_handles[] = { advertising_stop_handle }; 5665 const uint16_t durations[] = { 0 }; 5666 const uint16_t max_events[] = { 0 }; 5667 hci_send_cmd(&hci_le_set_extended_advertising_enable, 0, 1, advertising_handles, durations, max_events); 5668 } else 5669 #endif 5670 { 5671 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ACTIVE; 5672 hci_send_cmd(&hci_le_set_advertise_enable, 0); 5673 } 5674 return true; 5675 } 5676 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5677 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5678 if (periodic_advertising_stop){ 5679 advertising_stop_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 5680 hci_send_cmd(&hci_le_set_periodic_advertising_enable, 0, advertising_stop_set->advertising_handle); 5681 return true; 5682 } 5683 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5684 #endif /* ENABLE_LE_EXTENDED_ADVERTISING */ 5685 #endif /* ENABLE_LE_PERIPHERAL */ 5686 5687 5688 // Phase 3: modify 5689 5690 if (random_address_change){ 5691 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5692 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5693 if (hci_extended_advertising_supported()) { 5694 hci_send_cmd(&hci_le_set_advertising_set_random_address, 0, hci_stack->le_random_address); 5695 } 5696 #endif 5697 { 5698 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 5699 } 5700 return true; 5701 } 5702 5703 #ifdef ENABLE_LE_CENTRAL 5704 if (hci_stack->le_scanning_param_update){ 5705 hci_stack->le_scanning_param_update = false; 5706 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5707 if (hci_extended_advertising_supported()){ 5708 // prepare arrays for all PHYs 5709 uint8_t scan_types[1] = { hci_stack->le_scan_type }; 5710 uint16_t scan_intervals[1] = { hci_stack->le_scan_interval }; 5711 uint16_t scan_windows[1] = { hci_stack->le_scan_window }; 5712 uint8_t scanning_phys = 1; // LE 1M PHY 5713 hci_send_cmd(&hci_le_set_extended_scan_parameters, hci_stack->le_own_addr_type, 5714 hci_stack->le_scan_filter_policy, scanning_phys, scan_types, scan_intervals, scan_windows); 5715 } else 5716 #endif 5717 { 5718 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 5719 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 5720 } 5721 return true; 5722 } 5723 #endif 5724 5725 #ifdef ENABLE_LE_PERIPHERAL 5726 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 5727 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5728 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 5729 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5730 if (hci_extended_advertising_supported()){ 5731 // map advertisment type to advertising event properties 5732 uint16_t adv_event_properties = 0; 5733 const uint16_t mapping[] = { 0b00010011, 0b00010101, 0b00011101, 0b00010010, 0b00010000}; 5734 if (hci_stack->le_advertisements_type < (sizeof(mapping)/sizeof(uint16_t))){ 5735 adv_event_properties = mapping[hci_stack->le_advertisements_type]; 5736 } 5737 hci_stack->le_advertising_set_in_current_command = 0; 5738 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5739 0, 5740 adv_event_properties, 5741 hci_stack->le_advertisements_interval_min, 5742 hci_stack->le_advertisements_interval_max, 5743 hci_stack->le_advertisements_channel_map, 5744 hci_stack->le_advertisements_own_addr_type, 5745 hci_stack->le_advertisements_direct_address_type, 5746 hci_stack->le_advertisements_direct_address, 5747 hci_stack->le_advertisements_filter_policy, 5748 0x7f, // tx power: no preference 5749 0x01, // primary adv phy: LE 1M 5750 0, // secondary adv max skip 5751 0, // secondary adv phy 5752 0, // adv sid 5753 0 // scan request notification 5754 ); 5755 } 5756 #endif 5757 { 5758 hci_send_cmd(&hci_le_set_advertising_parameters, 5759 hci_stack->le_advertisements_interval_min, 5760 hci_stack->le_advertisements_interval_max, 5761 hci_stack->le_advertisements_type, 5762 hci_stack->le_advertisements_own_addr_type, 5763 hci_stack->le_advertisements_direct_address_type, 5764 hci_stack->le_advertisements_direct_address, 5765 hci_stack->le_advertisements_channel_map, 5766 hci_stack->le_advertisements_filter_policy); 5767 } 5768 return true; 5769 } 5770 5771 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 5772 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5773 uint8_t adv_data_clean[31]; 5774 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 5775 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 5776 hci_stack->le_advertisements_data_len); 5777 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 5778 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5779 if (hci_extended_advertising_supported()){ 5780 hci_stack->le_advertising_set_in_current_command = 0; 5781 hci_send_cmd(&hci_le_set_extended_advertising_data, 0, 0x03, 0x01, hci_stack->le_advertisements_data_len, adv_data_clean); 5782 } else 5783 #endif 5784 { 5785 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 5786 } 5787 return true; 5788 } 5789 5790 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 5791 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5792 uint8_t scan_data_clean[31]; 5793 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 5794 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 5795 hci_stack->le_scan_response_data_len); 5796 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 5797 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5798 if (hci_extended_advertising_supported()){ 5799 hci_stack->le_advertising_set_in_current_command = 0; 5800 hci_send_cmd(&hci_le_set_extended_scan_response_data, 0, 0x03, 0x01, hci_stack->le_scan_response_data_len, scan_data_clean); 5801 } else 5802 #endif 5803 { 5804 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 5805 } 5806 return true; 5807 } 5808 5809 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5810 if (hci_extended_advertising_supported()) { 5811 btstack_linked_list_iterator_t it; 5812 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 5813 while (btstack_linked_list_iterator_has_next(&it)){ 5814 le_advertising_set_t * advertising_set = (le_advertising_set_t*) btstack_linked_list_iterator_next(&it); 5815 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_REMOVE_SET) != 0) { 5816 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_REMOVE_SET; 5817 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5818 hci_send_cmd(&hci_le_remove_advertising_set, advertising_set->advertising_handle); 5819 return true; 5820 } 5821 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0){ 5822 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 5823 hci_send_cmd(&hci_le_set_advertising_set_random_address, advertising_set->advertising_handle, advertising_set->random_address); 5824 return true; 5825 } 5826 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0){ 5827 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5828 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5829 hci_send_cmd(&hci_le_set_extended_advertising_parameters, 5830 advertising_set->advertising_handle, 5831 advertising_set->extended_params.advertising_event_properties, 5832 advertising_set->extended_params.primary_advertising_interval_min, 5833 advertising_set->extended_params.primary_advertising_interval_max, 5834 advertising_set->extended_params.primary_advertising_channel_map, 5835 advertising_set->extended_params.own_address_type, 5836 advertising_set->extended_params.peer_address_type, 5837 advertising_set->extended_params.peer_address, 5838 advertising_set->extended_params.advertising_filter_policy, 5839 advertising_set->extended_params.advertising_tx_power, 5840 advertising_set->extended_params.primary_advertising_phy, 5841 advertising_set->extended_params.secondary_advertising_max_skip, 5842 advertising_set->extended_params.secondary_advertising_phy, 5843 advertising_set->extended_params.advertising_sid, 5844 advertising_set->extended_params.scan_request_notification_enable 5845 ); 5846 return true; 5847 } 5848 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA) != 0) { 5849 uint16_t pos = advertising_set->adv_data_pos; 5850 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->adv_data_len); 5851 uint16_t data_to_upload = btstack_min(advertising_set->adv_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5852 if ((operation & 0x02) != 0){ 5853 // last fragment or complete data 5854 operation |= 2; 5855 advertising_set->adv_data_pos = 0; 5856 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5857 } else { 5858 advertising_set->adv_data_pos += data_to_upload; 5859 } 5860 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5861 hci_send_cmd(&hci_le_set_extended_advertising_data, advertising_set->advertising_handle, operation, 0x01, data_to_upload, &advertising_set->adv_data[pos]); 5862 return true; 5863 } 5864 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA) != 0) { 5865 uint16_t pos = advertising_set->scan_data_pos; 5866 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->scan_data_len); 5867 uint16_t data_to_upload = btstack_min(advertising_set->scan_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5868 if ((operation & 0x02) != 0){ 5869 advertising_set->scan_data_pos = 0; 5870 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5871 } else { 5872 advertising_set->scan_data_pos += data_to_upload; 5873 } 5874 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5875 hci_send_cmd(&hci_le_set_extended_scan_response_data, operation, 0x03, 0x01, data_to_upload, &advertising_set->scan_data[pos]); 5876 return true; 5877 } 5878 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 5879 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS) != 0){ 5880 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 5881 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5882 hci_send_cmd(&hci_le_set_periodic_advertising_parameters, 5883 advertising_set->advertising_handle, 5884 advertising_set->periodic_params.periodic_advertising_interval_min, 5885 advertising_set->periodic_params.periodic_advertising_interval_max, 5886 advertising_set->periodic_params.periodic_advertising_properties); 5887 return true; 5888 } 5889 if ((advertising_set->tasks & LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA) != 0) { 5890 uint16_t pos = advertising_set->periodic_data_pos; 5891 uint8_t operation = hci_le_extended_advertising_operation_for_chunk(pos, advertising_set->periodic_data_len); 5892 uint16_t data_to_upload = btstack_min(advertising_set->periodic_data_len - pos, LE_EXTENDED_ADVERTISING_MAX_CHUNK_LEN); 5893 if ((operation & 0x02) != 0){ 5894 // last fragment or complete data 5895 operation |= 2; 5896 advertising_set->periodic_data_pos = 0; 5897 advertising_set->tasks &= ~LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 5898 } else { 5899 advertising_set->periodic_data_pos += data_to_upload; 5900 } 5901 hci_stack->le_advertising_set_in_current_command = advertising_set->advertising_handle; 5902 hci_send_cmd(&hci_le_set_periodic_advertising_data, advertising_set->advertising_handle, operation, data_to_upload, &advertising_set->periodic_data[pos]); 5903 return true; 5904 } 5905 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 5906 } 5907 } 5908 #endif 5909 5910 #endif 5911 5912 #ifdef ENABLE_LE_CENTRAL 5913 // if connect with whitelist was active and is not cancelled yet, wait until next time 5914 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 5915 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 5916 // if periodic sync with advertiser list was active and is not cancelled yet, wait until next time 5917 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_CANCEL) return false; 5918 #endif 5919 #endif 5920 5921 // LE Whitelist Management 5922 if (whitelist_modification_pending){ 5923 // add/remove entries 5924 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5925 while (btstack_linked_list_iterator_has_next(&lit)){ 5926 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5927 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 5928 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5929 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 5930 return true; 5931 } 5932 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 5933 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 5934 entry->state |= LE_WHITELIST_ON_CONTROLLER; 5935 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 5936 return true; 5937 } 5938 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 5939 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5940 btstack_memory_whitelist_entry_free(entry); 5941 } 5942 } 5943 } 5944 5945 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 5946 // LE Resolving List Management 5947 if (resolving_list_supported) { 5948 uint16_t i; 5949 switch (hci_stack->le_resolving_list_state) { 5950 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 5951 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 5952 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 5953 return true; 5954 case LE_RESOLVING_LIST_READ_SIZE: 5955 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 5956 hci_send_cmd(&hci_le_read_resolving_list_size); 5957 return true; 5958 case LE_RESOLVING_LIST_SEND_CLEAR: 5959 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 5960 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 5961 sizeof(hci_stack->le_resolving_list_add_entries)); 5962 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 5963 sizeof(hci_stack->le_resolving_list_remove_entries)); 5964 hci_send_cmd(&hci_le_clear_resolving_list); 5965 return true; 5966 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 5967 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 5968 uint8_t offset = i >> 3; 5969 uint8_t mask = 1 << (i & 7); 5970 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 5971 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 5972 bd_addr_t peer_identity_addreses; 5973 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 5974 sm_key_t peer_irk; 5975 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 5976 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 5977 5978 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 5979 // trigger whitelist entry 'update' (work around for controller bug) 5980 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5981 while (btstack_linked_list_iterator_has_next(&lit)) { 5982 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 5983 if (entry->address_type != peer_identity_addr_type) continue; 5984 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 5985 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 5986 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 5987 } 5988 #endif 5989 5990 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 5991 peer_identity_addreses); 5992 return true; 5993 } 5994 5995 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 5996 5997 /* fall through */ 5998 5999 case LE_RESOLVING_LIST_ADD_ENTRIES: 6000 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 6001 uint8_t offset = i >> 3; 6002 uint8_t mask = 1 << (i & 7); 6003 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 6004 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 6005 bd_addr_t peer_identity_addreses; 6006 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 6007 sm_key_t peer_irk; 6008 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 6009 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 6010 if (btstack_is_null(peer_irk, 16)) continue; 6011 const uint8_t *local_irk = gap_get_persistent_irk(); 6012 // command uses format specifier 'P' that stores 16-byte value without flip 6013 uint8_t local_irk_flipped[16]; 6014 uint8_t peer_irk_flipped[16]; 6015 reverse_128(local_irk, local_irk_flipped); 6016 reverse_128(peer_irk, peer_irk_flipped); 6017 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 6018 peer_irk_flipped, local_irk_flipped); 6019 return true; 6020 } 6021 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6022 break; 6023 6024 default: 6025 break; 6026 } 6027 } 6028 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 6029 #endif 6030 6031 #ifdef ENABLE_LE_CENTRAL 6032 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6033 // LE Whitelist Management 6034 if (periodic_list_modification_pending){ 6035 // add/remove entries 6036 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 6037 while (btstack_linked_list_iterator_has_next(&lit)){ 6038 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 6039 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER){ 6040 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 6041 hci_send_cmd(&hci_le_remove_device_from_periodic_advertiser_list, entry->address_type, entry->address); 6042 return true; 6043 } 6044 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER){ 6045 entry->state &= ~LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 6046 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER; 6047 hci_send_cmd(&hci_le_add_device_to_periodic_advertiser_list, entry->address_type, entry->address, entry->sid); 6048 return true; 6049 } 6050 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER) == 0){ 6051 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 6052 btstack_memory_periodic_advertiser_list_entry_free(entry); 6053 } 6054 } 6055 } 6056 #endif 6057 #endif 6058 6059 // post-pone all actions until stack is fully working 6060 if (hci_stack->state != HCI_STATE_WORKING) return false; 6061 6062 // advertisements, active scanning, and creating connections requires random address to be set if using private address 6063 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 6064 6065 // Phase 4: restore state 6066 6067 #ifdef ENABLE_LE_CENTRAL 6068 // re-start scanning 6069 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 6070 hci_stack->le_scanning_active = true; 6071 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6072 if (hci_extended_advertising_supported()){ 6073 hci_send_cmd(&hci_le_set_extended_scan_enable, 1, 0, 0, 0); 6074 } else 6075 #endif 6076 { 6077 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 6078 } 6079 return true; 6080 } 6081 #endif 6082 6083 #ifdef ENABLE_LE_CENTRAL 6084 // re-start connecting 6085 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 6086 bd_addr_t null_addr; 6087 memset(null_addr, 0, 6); 6088 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6089 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6090 hci_send_cmd(&hci_le_create_connection, 6091 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 6092 hci_stack->le_connection_scan_window, // scan interval: 30 ms 6093 1, // use whitelist 6094 0, // peer address type 6095 null_addr, // peer bd addr 6096 hci_stack->le_connection_own_addr_type, // our addr type: 6097 hci_stack->le_connection_interval_min, // conn interval min 6098 hci_stack->le_connection_interval_max, // conn interval max 6099 hci_stack->le_connection_latency, // conn latency 6100 hci_stack->le_supervision_timeout, // conn latency 6101 hci_stack->le_minimum_ce_length, // min ce length 6102 hci_stack->le_maximum_ce_length // max ce length 6103 ); 6104 return true; 6105 } 6106 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6107 if (hci_stack->le_periodic_sync_state == LE_CONNECTING_IDLE){ 6108 switch(hci_stack->le_periodic_sync_request){ 6109 case LE_CONNECTING_DIRECT: 6110 case LE_CONNECTING_WHITELIST: 6111 hci_stack->le_periodic_sync_state = ((hci_stack->le_periodic_sync_options & 1) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 6112 hci_send_cmd(&hci_le_periodic_advertising_create_sync, 6113 hci_stack->le_periodic_sync_options, 6114 hci_stack->le_periodic_sync_advertising_sid, 6115 hci_stack->le_periodic_sync_advertiser_address_type, 6116 hci_stack->le_periodic_sync_advertiser_address, 6117 hci_stack->le_periodic_sync_skip, 6118 hci_stack->le_periodic_sync_timeout, 6119 hci_stack->le_periodic_sync_cte_type); 6120 return true; 6121 default: 6122 break; 6123 } 6124 } 6125 #endif 6126 #endif 6127 6128 #ifdef ENABLE_LE_PERIPHERAL 6129 // re-start advertising 6130 if (hci_stack->le_advertisements_enabled_for_current_roles && ((hci_stack->le_advertisements_state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6131 // check if advertisements should be enabled given 6132 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6133 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 6134 6135 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6136 if (hci_extended_advertising_supported()){ 6137 const uint8_t advertising_handles[] = { 0 }; 6138 const uint16_t durations[] = { 0 }; 6139 const uint16_t max_events[] = { 0 }; 6140 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6141 } else 6142 #endif 6143 { 6144 hci_send_cmd(&hci_le_set_advertise_enable, 1); 6145 } 6146 return true; 6147 } 6148 6149 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6150 if (hci_extended_advertising_supported()) { 6151 btstack_linked_list_iterator_t it; 6152 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 6153 while (btstack_linked_list_iterator_has_next(&it)) { 6154 le_advertising_set_t *advertising_set = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 6155 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_ACTIVE) == 0)){ 6156 advertising_set->state |= LE_ADVERTISEMENT_STATE_ACTIVE; 6157 const uint8_t advertising_handles[] = { advertising_set->advertising_handle }; 6158 const uint16_t durations[] = { advertising_set->enable_timeout }; 6159 const uint16_t max_events[] = { advertising_set->enable_max_scan_events }; 6160 hci_send_cmd(&hci_le_set_extended_advertising_enable, 1, 1, advertising_handles, durations, max_events); 6161 return true; 6162 } 6163 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 6164 if (((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED) != 0) && ((advertising_set->state & LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE) == 0)){ 6165 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ACTIVE; 6166 uint8_t enable = 1; 6167 if (advertising_set->periodic_include_adi){ 6168 enable |= 2; 6169 } 6170 hci_send_cmd(&hci_le_set_periodic_advertising_enable, enable, advertising_set->advertising_handle); 6171 return true; 6172 } 6173 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 6174 } 6175 } 6176 #endif 6177 #endif 6178 6179 return false; 6180 } 6181 6182 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6183 static bool hci_run_iso_tasks(void){ 6184 btstack_linked_list_iterator_t it; 6185 6186 if (hci_stack->iso_active_operation_group_id != 0xff) { 6187 return false; 6188 } 6189 6190 // BIG 6191 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 6192 while (btstack_linked_list_iterator_has_next(&it)){ 6193 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 6194 switch (big->state){ 6195 case LE_AUDIO_BIG_STATE_CREATE: 6196 hci_stack->iso_active_operation_group_id = big->params->big_handle; 6197 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6198 big->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6199 hci_send_cmd(&hci_le_create_big, 6200 big->params->big_handle, 6201 big->params->advertising_handle, 6202 big->params->num_bis, 6203 big->params->sdu_interval_us, 6204 big->params->max_sdu, 6205 big->params->max_transport_latency_ms, 6206 big->params->rtn, 6207 big->params->phy, 6208 big->params->packing, 6209 big->params->framing, 6210 big->params->encryption, 6211 big->params->broadcast_code); 6212 return true; 6213 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6214 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6215 hci_send_cmd(&hci_le_setup_iso_data_path, big->bis_con_handles[big->state_vars.next_bis], 0, 0, 0, 0, 0, 0, 0, NULL); 6216 return true; 6217 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6218 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6219 hci_send_cmd(&hci_le_terminate_big, big->big_handle, big->state_vars.status); 6220 return true; 6221 case LE_AUDIO_BIG_STATE_TERMINATE: 6222 big->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6223 hci_send_cmd(&hci_le_terminate_big, big->big_handle, ERROR_CODE_SUCCESS); 6224 return true; 6225 default: 6226 break; 6227 } 6228 } 6229 6230 // BIG Sync 6231 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 6232 while (btstack_linked_list_iterator_has_next(&it)){ 6233 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 6234 switch (big_sync->state){ 6235 case LE_AUDIO_BIG_STATE_CREATE: 6236 hci_stack->iso_active_operation_group_id = big_sync->params->big_handle; 6237 hci_stack->iso_active_operation_type = HCI_ISO_TYPE_BIS; 6238 big_sync->state = LE_AUDIO_BIG_STATE_W4_ESTABLISHED; 6239 hci_send_cmd(&hci_le_big_create_sync, 6240 big_sync->params->big_handle, 6241 big_sync->params->sync_handle, 6242 big_sync->params->encryption, 6243 big_sync->params->broadcast_code, 6244 big_sync->params->mse, 6245 big_sync->params->big_sync_timeout_10ms, 6246 big_sync->params->num_bis, 6247 big_sync->params->bis_indices); 6248 return true; 6249 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 6250 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH; 6251 hci_send_cmd(&hci_le_setup_iso_data_path, big_sync->bis_con_handles[big_sync->state_vars.next_bis], 1, 0, 0, 0, 0, 0, 0, NULL); 6252 return true; 6253 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATHS_FAILED: 6254 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED_AFTER_SETUP_FAILED; 6255 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6256 return true; 6257 case LE_AUDIO_BIG_STATE_TERMINATE: 6258 big_sync->state = LE_AUDIO_BIG_STATE_W4_TERMINATED; 6259 hci_send_cmd(&hci_le_big_terminate_sync, big_sync->big_handle); 6260 return true; 6261 default: 6262 break; 6263 } 6264 } 6265 6266 return false; 6267 } 6268 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6269 #endif 6270 6271 static bool hci_run_general_pending_commands(void){ 6272 btstack_linked_item_t * it; 6273 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 6274 hci_connection_t * connection = (hci_connection_t *) it; 6275 6276 switch(connection->state){ 6277 case SEND_CREATE_CONNECTION: 6278 switch(connection->address_type){ 6279 #ifdef ENABLE_CLASSIC 6280 case BD_ADDR_TYPE_ACL: 6281 log_info("sending hci_create_connection"); 6282 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 6283 break; 6284 #endif 6285 default: 6286 #ifdef ENABLE_BLE 6287 #ifdef ENABLE_LE_CENTRAL 6288 log_info("sending hci_le_create_connection"); 6289 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 6290 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 6291 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 6292 if (hci_extended_advertising_supported()) { 6293 uint16_t le_connection_scan_interval[1] = { hci_stack->le_connection_scan_interval }; 6294 uint16_t le_connection_scan_window[1] = { hci_stack->le_connection_scan_window }; 6295 uint16_t le_connection_interval_min[1] = { hci_stack->le_connection_interval_min }; 6296 uint16_t le_connection_interval_max[1] = { hci_stack->le_connection_interval_max }; 6297 uint16_t le_connection_latency[1] = { hci_stack->le_connection_latency }; 6298 uint16_t le_supervision_timeout[1] = { hci_stack->le_supervision_timeout }; 6299 uint16_t le_minimum_ce_length[1] = { hci_stack->le_minimum_ce_length }; 6300 uint16_t le_maximum_ce_length[1] = { hci_stack->le_maximum_ce_length }; 6301 hci_send_cmd(&hci_le_extended_create_connection, 6302 0, // don't use whitelist 6303 hci_stack->le_connection_own_addr_type, // our addr type: 6304 connection->address_type, // peer address type 6305 connection->address, // peer bd addr 6306 1, // initiating PHY - 1M 6307 le_connection_scan_interval, // conn scan interval 6308 le_connection_scan_window, // conn scan windows 6309 le_connection_interval_min, // conn interval min 6310 le_connection_interval_max, // conn interval max 6311 le_connection_latency, // conn latency 6312 le_supervision_timeout, // conn latency 6313 le_minimum_ce_length, // min ce length 6314 le_maximum_ce_length // max ce length 6315 ); } 6316 else 6317 #endif 6318 { 6319 hci_send_cmd(&hci_le_create_connection, 6320 hci_stack->le_connection_scan_interval, // conn scan interval 6321 hci_stack->le_connection_scan_window, // conn scan windows 6322 0, // don't use whitelist 6323 connection->address_type, // peer address type 6324 connection->address, // peer bd addr 6325 hci_stack->le_connection_own_addr_type, // our addr type: 6326 hci_stack->le_connection_interval_min, // conn interval min 6327 hci_stack->le_connection_interval_max, // conn interval max 6328 hci_stack->le_connection_latency, // conn latency 6329 hci_stack->le_supervision_timeout, // conn latency 6330 hci_stack->le_minimum_ce_length, // min ce length 6331 hci_stack->le_maximum_ce_length // max ce length 6332 ); 6333 } 6334 connection->state = SENT_CREATE_CONNECTION; 6335 #endif 6336 #endif 6337 break; 6338 } 6339 return true; 6340 6341 #ifdef ENABLE_CLASSIC 6342 case RECEIVED_CONNECTION_REQUEST: 6343 connection->role = HCI_ROLE_SLAVE; 6344 if (connection->address_type == BD_ADDR_TYPE_ACL){ 6345 log_info("sending hci_accept_connection_request"); 6346 connection->state = ACCEPTED_CONNECTION_REQUEST; 6347 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 6348 return true; 6349 } 6350 break; 6351 #endif 6352 case SEND_DISCONNECT: 6353 connection->state = SENT_DISCONNECT; 6354 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6355 return true; 6356 6357 default: 6358 break; 6359 } 6360 6361 // no further commands if connection is about to get shut down 6362 if (connection->state == SENT_DISCONNECT) continue; 6363 6364 #ifdef ENABLE_CLASSIC 6365 6366 // Handling link key request requires remote supported features 6367 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 6368 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 6369 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6370 6371 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 6372 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 6373 if (have_link_key && security_level_sufficient){ 6374 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 6375 } else { 6376 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 6377 } 6378 return true; 6379 } 6380 6381 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 6382 log_info("denying to pin request"); 6383 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 6384 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 6385 return true; 6386 } 6387 6388 // security assessment requires remote features 6389 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 6390 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 6391 hci_ssp_assess_security_on_io_cap_request(connection); 6392 // no return here as hci_ssp_assess_security_on_io_cap_request only sets AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY or AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY 6393 } 6394 6395 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 6396 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6397 // set authentication requirements: 6398 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 6399 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 6400 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 6401 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 6402 authreq |= 1; 6403 } 6404 bool bonding = hci_stack->bondable; 6405 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 6406 // if we have received IO Cap Response, we're in responder role 6407 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6408 if (bonding && !remote_bonding){ 6409 log_info("Remote not bonding, dropping local flag"); 6410 bonding = false; 6411 } 6412 } 6413 if (bonding){ 6414 if (connection->bonding_flags & BONDING_DEDICATED){ 6415 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 6416 } else { 6417 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 6418 } 6419 } 6420 uint8_t have_oob_data = 0; 6421 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6422 if (connection->classic_oob_c_192 != NULL){ 6423 have_oob_data |= 1; 6424 } 6425 if (connection->classic_oob_c_256 != NULL){ 6426 have_oob_data |= 2; 6427 } 6428 #endif 6429 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 6430 return true; 6431 } 6432 6433 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 6434 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6435 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 6436 return true; 6437 } 6438 6439 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6440 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 6441 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 6442 const uint8_t zero[16] = { 0 }; 6443 const uint8_t * r_192 = zero; 6444 const uint8_t * c_192 = zero; 6445 const uint8_t * r_256 = zero; 6446 const uint8_t * c_256 = zero; 6447 // verify P-256 OOB 6448 if ((connection->classic_oob_c_256 != NULL) && hci_command_supported(SUPPORTED_HCI_COMMAND_REMOTE_OOB_EXTENDED_DATA_REQUEST_REPLY)) { 6449 c_256 = connection->classic_oob_c_256; 6450 if (connection->classic_oob_r_256 != NULL) { 6451 r_256 = connection->classic_oob_r_256; 6452 } 6453 } 6454 // verify P-192 OOB 6455 if ((connection->classic_oob_c_192 != NULL)) { 6456 c_192 = connection->classic_oob_c_192; 6457 if (connection->classic_oob_r_192 != NULL) { 6458 r_192 = connection->classic_oob_r_192; 6459 } 6460 } 6461 6462 // assess security 6463 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 6464 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 6465 if (need_level_4 && !can_reach_level_4){ 6466 log_info("Level 4 required, but not possible -> abort"); 6467 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 6468 // send oob negative reply 6469 c_256 = NULL; 6470 c_192 = NULL; 6471 } 6472 6473 // Reply 6474 if (c_256 != zero) { 6475 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 6476 } else if (c_192 != zero){ 6477 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 6478 } else { 6479 hci_stack->classic_oob_con_handle = connection->con_handle; 6480 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 6481 } 6482 return true; 6483 } 6484 #endif 6485 6486 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 6487 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 6488 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 6489 return true; 6490 } 6491 6492 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 6493 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 6494 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 6495 return true; 6496 } 6497 6498 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 6499 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 6500 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 6501 return true; 6502 } 6503 6504 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 6505 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 6506 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 6507 connection->state = SENT_DISCONNECT; 6508 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 6509 return true; 6510 } 6511 6512 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 6513 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 6514 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 6515 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 6516 return true; 6517 } 6518 6519 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 6520 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 6521 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 6522 return true; 6523 } 6524 6525 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 6526 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 6527 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 6528 return true; 6529 } 6530 6531 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 6532 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 6533 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 6534 return true; 6535 } 6536 6537 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 6538 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 6539 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 6540 return true; 6541 } 6542 6543 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 6544 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 6545 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 6546 return true; 6547 } 6548 #endif 6549 6550 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 6551 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 6552 #ifdef ENABLE_CLASSIC 6553 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 6554 #endif 6555 if (connection->state != SENT_DISCONNECT){ 6556 connection->state = SENT_DISCONNECT; 6557 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 6558 return true; 6559 } 6560 } 6561 6562 #ifdef ENABLE_CLASSIC 6563 uint16_t sniff_min_interval; 6564 switch (connection->sniff_min_interval){ 6565 case 0: 6566 break; 6567 case 0xffff: 6568 connection->sniff_min_interval = 0; 6569 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 6570 return true; 6571 default: 6572 sniff_min_interval = connection->sniff_min_interval; 6573 connection->sniff_min_interval = 0; 6574 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 6575 return true; 6576 } 6577 6578 if (connection->sniff_subrating_max_latency != 0xffff){ 6579 uint16_t max_latency = connection->sniff_subrating_max_latency; 6580 connection->sniff_subrating_max_latency = 0; 6581 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 6582 return true; 6583 } 6584 6585 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 6586 uint8_t service_type = (uint8_t) connection->qos_service_type; 6587 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 6588 hci_send_cmd(&hci_qos_setup, connection->con_handle, 0, service_type, connection->qos_token_rate, connection->qos_peak_bandwidth, connection->qos_latency, connection->qos_delay_variation); 6589 return true; 6590 } 6591 6592 if (connection->request_role != HCI_ROLE_INVALID){ 6593 hci_role_t role = connection->request_role; 6594 connection->request_role = HCI_ROLE_INVALID; 6595 hci_send_cmd(&hci_switch_role_command, connection->address, role); 6596 return true; 6597 } 6598 #endif 6599 6600 if (connection->gap_connection_tasks != 0){ 6601 #ifdef ENABLE_CLASSIC 6602 if ((connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT) != 0){ 6603 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_AUTOMATIC_FLUSH_TIMEOUT; 6604 hci_send_cmd(&hci_write_automatic_flush_timeout, connection->con_handle, hci_stack->automatic_flush_timeout); 6605 return true; 6606 } 6607 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT){ 6608 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_WRITE_SUPERVISION_TIMEOUT; 6609 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 6610 return true; 6611 } 6612 #endif 6613 if (connection->gap_connection_tasks & GAP_CONNECTION_TASK_READ_RSSI){ 6614 connection->gap_connection_tasks &= ~GAP_CONNECTION_TASK_READ_RSSI; 6615 hci_send_cmd(&hci_read_rssi, connection->con_handle); 6616 return true; 6617 } 6618 } 6619 6620 #ifdef ENABLE_BLE 6621 switch (connection->le_con_parameter_update_state){ 6622 // response to L2CAP CON PARAMETER UPDATE REQUEST 6623 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 6624 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6625 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 6626 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6627 0x0000, 0xffff); 6628 return true; 6629 case CON_PARAMETER_UPDATE_REPLY: 6630 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6631 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 6632 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 6633 0x0000, 0xffff); 6634 return true; 6635 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 6636 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 6637 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, connection->con_handle, 6638 ERROR_CODE_UNACCEPTABLE_CONNECTION_PARAMETERS); 6639 return true; 6640 default: 6641 break; 6642 } 6643 if (connection->le_phy_update_all_phys != 0xffu){ 6644 uint8_t all_phys = connection->le_phy_update_all_phys; 6645 connection->le_phy_update_all_phys = 0xff; 6646 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 6647 return true; 6648 } 6649 #endif 6650 } 6651 return false; 6652 } 6653 6654 static void hci_run(void){ 6655 6656 // stack state sub statemachines 6657 switch (hci_stack->state) { 6658 case HCI_STATE_INITIALIZING: 6659 hci_initializing_run(); 6660 break; 6661 case HCI_STATE_HALTING: 6662 hci_halting_run(); 6663 break; 6664 case HCI_STATE_FALLING_ASLEEP: 6665 hci_falling_asleep_run(); 6666 break; 6667 default: 6668 break; 6669 } 6670 6671 // allow to run after initialization to working transition 6672 if (hci_stack->state != HCI_STATE_WORKING){ 6673 return; 6674 } 6675 6676 bool done; 6677 6678 // send continuation fragments first, as they block the prepared packet buffer 6679 done = hci_run_acl_fragments(); 6680 if (done) return; 6681 6682 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6683 done = hci_run_iso_fragments(); 6684 if (done) return; 6685 #endif 6686 6687 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 6688 // send host num completed packets next as they don't require num_cmd_packets > 0 6689 if (!hci_can_send_comand_packet_transport()) return; 6690 if (hci_stack->host_completed_packets){ 6691 hci_host_num_completed_packets(); 6692 return; 6693 } 6694 #endif 6695 6696 if (!hci_can_send_command_packet_now()) return; 6697 6698 // global/non-connection oriented commands 6699 6700 6701 #ifdef ENABLE_CLASSIC 6702 // general gap classic 6703 done = hci_run_general_gap_classic(); 6704 if (done) return; 6705 #endif 6706 6707 #ifdef ENABLE_BLE 6708 // general gap le 6709 done = hci_run_general_gap_le(); 6710 if (done) return; 6711 6712 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6713 // ISO related tasks, e.g. BIG create/terminate/sync 6714 done = hci_run_iso_tasks(); 6715 if (done) return; 6716 #endif 6717 #endif 6718 6719 // send pending HCI commands 6720 hci_run_general_pending_commands(); 6721 } 6722 6723 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 6724 // house-keeping 6725 6726 #ifdef ENABLE_CLASSIC 6727 bd_addr_t addr; 6728 hci_connection_t * conn; 6729 #endif 6730 #ifdef ENABLE_LE_CENTRAL 6731 uint8_t initiator_filter_policy; 6732 #endif 6733 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6734 uint8_t i; 6735 uint8_t num_cis; 6736 hci_con_handle_t cis_handle; 6737 uint8_t status; 6738 #endif 6739 6740 uint16_t opcode = little_endian_read_16(packet, 0); 6741 switch (opcode) { 6742 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 6743 hci_stack->loopback_mode = packet[3]; 6744 break; 6745 6746 #ifdef ENABLE_CLASSIC 6747 case HCI_OPCODE_HCI_CREATE_CONNECTION: 6748 reverse_bd_addr(&packet[3], addr); 6749 log_info("Create_connection to %s", bd_addr_to_str(addr)); 6750 6751 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 6752 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 6753 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 6754 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 6755 } 6756 6757 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6758 if (!conn) { 6759 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6760 if (!conn) { 6761 // notify client that alloc failed 6762 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 6763 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 6764 } 6765 conn->state = SEND_CREATE_CONNECTION; 6766 conn->role = HCI_ROLE_MASTER; 6767 } 6768 6769 log_info("conn state %u", conn->state); 6770 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 6771 switch (conn->state) { 6772 // if connection active exists 6773 case OPEN: 6774 // and OPEN, emit connection complete command 6775 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 6776 // packet not sent to controller 6777 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6778 case RECEIVED_DISCONNECTION_COMPLETE: 6779 // create connection triggered in disconnect complete event, let's do it now 6780 break; 6781 case SEND_CREATE_CONNECTION: 6782 #ifdef ENABLE_HCI_SERIALIZED_CONTROLLER_OPERATIONS 6783 if (hci_classic_operation_active()){ 6784 return ERROR_CODE_SUCCESS; 6785 } 6786 #endif 6787 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 6788 break; 6789 default: 6790 // otherwise, just ignore as it is already in the open process 6791 // packet not sent to controller 6792 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 6793 } 6794 conn->state = SENT_CREATE_CONNECTION; 6795 6796 // track outgoing connection 6797 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 6798 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 6799 break; 6800 6801 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 6802 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 6803 // setup_synchronous_connection? Voice setting at offset 22 6804 // TODO: compare to current setting if sco connection already active 6805 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 6806 break; 6807 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 6808 // accept_synchronous_connection? Voice setting at offset 18 6809 // TODO: compare to current setting if sco connection already active 6810 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 6811 // track outgoing connection 6812 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 6813 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 6814 break; 6815 #endif 6816 #endif 6817 6818 #ifdef ENABLE_BLE 6819 #ifdef ENABLE_LE_CENTRAL 6820 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 6821 // white list used? 6822 initiator_filter_policy = packet[7]; 6823 switch (initiator_filter_policy) { 6824 case 0: 6825 // whitelist not used 6826 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 6827 break; 6828 case 1: 6829 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 6830 break; 6831 default: 6832 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 6833 break; 6834 } 6835 // track outgoing connection 6836 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 6837 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 6838 break; 6839 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 6840 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 6841 break; 6842 #endif 6843 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 6844 #ifdef ENABLE_LE_CENTRAL 6845 case HCI_OPCODE_HCI_LE_CREATE_CIS: 6846 status = ERROR_CODE_SUCCESS; 6847 num_cis = packet[3]; 6848 // setup hci_iso_streams 6849 for (i=0;i<num_cis;i++){ 6850 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 4 + (4 * i)); 6851 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, cis_handle, 0xff); 6852 if (status != ERROR_CODE_SUCCESS) { 6853 break; 6854 } 6855 } 6856 // free structs on error 6857 if (status != ERROR_CODE_SUCCESS){ 6858 hci_iso_stream_requested_finalize(0xff); 6859 return status; 6860 } 6861 break; 6862 #endif /* ENABLE_LE_CENTRAL */ 6863 #ifdef ENABLE_LE_PERIPHERAL 6864 case HCI_OPCODE_HCI_LE_ACCEPT_CIS_REQUEST: 6865 cis_handle = (hci_con_handle_t) little_endian_read_16(packet, 3); 6866 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, cis_handle, 0xff); 6867 if (status != ERROR_CODE_SUCCESS){ 6868 return status; 6869 } 6870 break; 6871 #endif /* ENABLE_LE_PERIPHERAL */ 6872 #endif /* ENABLE_LE_ISOCHRONOUS_STREAMS */ 6873 #endif /* ENABLE_BLE */ 6874 default: 6875 break; 6876 } 6877 6878 hci_stack->num_cmd_packets--; 6879 6880 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 6881 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 6882 if (err != 0){ 6883 return ERROR_CODE_HARDWARE_FAILURE; 6884 } 6885 return ERROR_CODE_SUCCESS; 6886 } 6887 6888 // disconnect because of security block 6889 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 6890 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6891 if (!connection) return; 6892 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 6893 } 6894 6895 6896 // Configure Secure Simple Pairing 6897 6898 #ifdef ENABLE_CLASSIC 6899 6900 // enable will enable SSP during init 6901 void gap_ssp_set_enable(int enable){ 6902 hci_stack->ssp_enable = enable; 6903 } 6904 6905 static int hci_local_ssp_activated(void){ 6906 return gap_ssp_supported() && hci_stack->ssp_enable; 6907 } 6908 6909 // if set, BTstack will respond to io capability request using authentication requirement 6910 void gap_ssp_set_io_capability(int io_capability){ 6911 hci_stack->ssp_io_capability = io_capability; 6912 } 6913 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 6914 hci_stack->ssp_authentication_requirement = authentication_requirement; 6915 } 6916 6917 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 6918 void gap_ssp_set_auto_accept(int auto_accept){ 6919 hci_stack->ssp_auto_accept = auto_accept; 6920 } 6921 6922 void gap_secure_connections_enable(bool enable){ 6923 hci_stack->secure_connections_enable = enable; 6924 } 6925 bool gap_secure_connections_active(void){ 6926 return hci_stack->secure_connections_active; 6927 } 6928 6929 #endif 6930 6931 // va_list part of hci_send_cmd 6932 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 6933 if (!hci_can_send_command_packet_now()){ 6934 log_error("hci_send_cmd called but cannot send packet now"); 6935 return ERROR_CODE_COMMAND_DISALLOWED; 6936 } 6937 6938 // for HCI INITIALIZATION 6939 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 6940 hci_stack->last_cmd_opcode = cmd->opcode; 6941 6942 hci_reserve_packet_buffer(); 6943 uint8_t * packet = hci_stack->hci_packet_buffer; 6944 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 6945 uint8_t status = hci_send_cmd_packet(packet, size); 6946 6947 // release packet buffer on error or for synchronous transport implementations 6948 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 6949 hci_release_packet_buffer(); 6950 hci_emit_transport_packet_sent(); 6951 } 6952 6953 return status; 6954 } 6955 6956 /** 6957 * pre: numcmds >= 0 - it's allowed to send a command to the controller 6958 */ 6959 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 6960 va_list argptr; 6961 va_start(argptr, cmd); 6962 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 6963 va_end(argptr); 6964 return status; 6965 } 6966 6967 // Create various non-HCI events. 6968 // TODO: generalize, use table similar to hci_create_command 6969 6970 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 6971 // dump packet 6972 if (dump) { 6973 hci_dump_packet( HCI_EVENT_PACKET, 1, event, size); 6974 } 6975 6976 // dispatch to all event handlers 6977 btstack_linked_list_iterator_t it; 6978 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 6979 while (btstack_linked_list_iterator_has_next(&it)){ 6980 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 6981 entry->callback(HCI_EVENT_PACKET, 0, event, size); 6982 } 6983 } 6984 6985 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 6986 if (!hci_stack->acl_packet_handler) return; 6987 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 6988 } 6989 6990 #ifdef ENABLE_CLASSIC 6991 static void hci_notify_if_sco_can_send_now(void){ 6992 // notify SCO sender if waiting 6993 if (!hci_stack->sco_waiting_for_can_send_now) return; 6994 if (hci_can_send_sco_packet_now()){ 6995 hci_stack->sco_waiting_for_can_send_now = 0; 6996 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 6997 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 6998 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 6999 } 7000 } 7001 7002 // parsing end emitting has been merged to reduce code size 7003 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 7004 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 7005 7006 uint8_t * eir_data; 7007 ad_context_t context; 7008 const uint8_t * name; 7009 uint8_t name_len; 7010 7011 if (size < 3) return; 7012 7013 int event_type = hci_event_packet_get_type(packet); 7014 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 7015 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 7016 7017 switch (event_type){ 7018 case HCI_EVENT_INQUIRY_RESULT: 7019 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7020 if (size != (3 + (num_responses * 14))) return; 7021 break; 7022 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7023 if (size != 257) return; 7024 if (num_responses != 1) return; 7025 break; 7026 default: 7027 return; 7028 } 7029 7030 // event[1] is set at the end 7031 int i; 7032 for (i=0; i<num_responses;i++){ 7033 memset(event, 0, sizeof(event)); 7034 event[0] = GAP_EVENT_INQUIRY_RESULT; 7035 uint8_t event_size = 27; // if name is not set by EIR 7036 7037 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 7038 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 7039 (void)memcpy(&event[9], 7040 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 7041 3); // class of device 7042 (void)memcpy(&event[12], 7043 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 7044 2); // clock offset 7045 7046 switch (event_type){ 7047 case HCI_EVENT_INQUIRY_RESULT: 7048 // 14,15,16,17 = 0, size 18 7049 break; 7050 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 7051 event[14] = 1; 7052 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7053 // 16,17 = 0, size 18 7054 break; 7055 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 7056 event[14] = 1; 7057 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 7058 // EIR packets only contain a single inquiry response 7059 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 7060 name = NULL; 7061 // Iterate over EIR data 7062 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 7063 uint8_t data_type = ad_iterator_get_data_type(&context); 7064 uint8_t data_size = ad_iterator_get_data_len(&context); 7065 const uint8_t * data = ad_iterator_get_data(&context); 7066 // Prefer Complete Local Name over Shortened Local Name 7067 switch (data_type){ 7068 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 7069 if (name) continue; 7070 /* fall through */ 7071 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 7072 name = data; 7073 name_len = data_size; 7074 break; 7075 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 7076 if (data_size != 8) break; 7077 event[16] = 1; 7078 memcpy(&event[17], data, 8); 7079 break; 7080 default: 7081 break; 7082 } 7083 } 7084 if (name){ 7085 event[25] = 1; 7086 // truncate name if needed 7087 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 7088 event[26] = len; 7089 (void)memcpy(&event[27], name, len); 7090 event_size += len; 7091 } 7092 break; 7093 default: 7094 return; 7095 } 7096 event[1] = event_size - 2; 7097 hci_emit_event(event, event_size, 1); 7098 } 7099 } 7100 #endif 7101 7102 void hci_emit_state(void){ 7103 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 7104 uint8_t event[3]; 7105 event[0] = BTSTACK_EVENT_STATE; 7106 event[1] = sizeof(event) - 2u; 7107 event[2] = hci_stack->state; 7108 hci_emit_event(event, sizeof(event), 1); 7109 } 7110 7111 #ifdef ENABLE_CLASSIC 7112 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7113 uint8_t event[13]; 7114 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 7115 event[1] = sizeof(event) - 2; 7116 event[2] = status; 7117 little_endian_store_16(event, 3, con_handle); 7118 reverse_bd_addr(address, &event[5]); 7119 event[11] = 1; // ACL connection 7120 event[12] = 0; // encryption disabled 7121 hci_emit_event(event, sizeof(event), 1); 7122 } 7123 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 7124 if (disable_l2cap_timeouts) return; 7125 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 7126 uint8_t event[4]; 7127 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 7128 event[1] = sizeof(event) - 2; 7129 little_endian_store_16(event, 2, conn->con_handle); 7130 hci_emit_event(event, sizeof(event), 1); 7131 } 7132 #endif 7133 7134 #ifdef ENABLE_BLE 7135 #ifdef ENABLE_LE_CENTRAL 7136 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 7137 uint8_t event[21]; 7138 event[0] = HCI_EVENT_LE_META; 7139 event[1] = sizeof(event) - 2u; 7140 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 7141 event[3] = status; 7142 little_endian_store_16(event, 4, con_handle); 7143 event[6] = 0; // TODO: role 7144 event[7] = address_type; 7145 reverse_bd_addr(address, &event[8]); 7146 little_endian_store_16(event, 14, 0); // interval 7147 little_endian_store_16(event, 16, 0); // latency 7148 little_endian_store_16(event, 18, 0); // supervision timeout 7149 event[20] = 0; // master clock accuracy 7150 hci_emit_event(event, sizeof(event), 1); 7151 } 7152 #endif 7153 #endif 7154 7155 static void hci_emit_transport_packet_sent(void){ 7156 // notify upper stack that it might be possible to send again 7157 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 7158 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 7159 } 7160 7161 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 7162 uint8_t event[6]; 7163 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 7164 event[1] = sizeof(event) - 2u; 7165 event[2] = 0; // status = OK 7166 little_endian_store_16(event, 3, con_handle); 7167 event[5] = reason; 7168 hci_emit_event(event, sizeof(event), 1); 7169 } 7170 7171 static void hci_emit_nr_connections_changed(void){ 7172 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 7173 uint8_t event[3]; 7174 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 7175 event[1] = sizeof(event) - 2u; 7176 event[2] = nr_hci_connections(); 7177 hci_emit_event(event, sizeof(event), 1); 7178 } 7179 7180 static void hci_emit_hci_open_failed(void){ 7181 log_info("BTSTACK_EVENT_POWERON_FAILED"); 7182 uint8_t event[2]; 7183 event[0] = BTSTACK_EVENT_POWERON_FAILED; 7184 event[1] = sizeof(event) - 2u; 7185 hci_emit_event(event, sizeof(event), 1); 7186 } 7187 7188 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 7189 log_info("hci_emit_dedicated_bonding_result %u ", status); 7190 uint8_t event[9]; 7191 int pos = 0; 7192 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 7193 event[pos++] = sizeof(event) - 2u; 7194 event[pos++] = status; 7195 reverse_bd_addr(address, &event[pos]); 7196 hci_emit_event(event, sizeof(event), 1); 7197 } 7198 7199 7200 #ifdef ENABLE_CLASSIC 7201 7202 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 7203 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 7204 uint8_t event[5]; 7205 int pos = 0; 7206 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 7207 event[pos++] = sizeof(event) - 2; 7208 little_endian_store_16(event, 2, con_handle); 7209 pos += 2; 7210 event[pos++] = level; 7211 hci_emit_event(event, sizeof(event), 1); 7212 } 7213 7214 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 7215 if (!connection) return LEVEL_0; 7216 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 7217 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 7218 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 7219 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 7220 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 7221 // LEVEL 4 always requires 128 bit encrytion key size 7222 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 7223 security_level = LEVEL_3; 7224 } 7225 return security_level; 7226 } 7227 7228 static void hci_emit_scan_mode_changed(uint8_t discoverable, uint8_t connectable){ 7229 uint8_t event[4]; 7230 event[0] = BTSTACK_EVENT_SCAN_MODE_CHANGED; 7231 event[1] = sizeof(event) - 2; 7232 event[2] = discoverable; 7233 event[3] = connectable; 7234 hci_emit_event(event, sizeof(event), 1); 7235 } 7236 7237 // query if remote side supports eSCO 7238 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 7239 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7240 if (!connection) return false; 7241 return (connection->remote_supported_features[0] & 1) != 0; 7242 } 7243 7244 static bool hci_ssp_supported(hci_connection_t * connection){ 7245 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 7246 return (connection->bonding_flags & mask) == mask; 7247 } 7248 7249 // query if remote side supports SSP 7250 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 7251 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7252 if (!connection) return false; 7253 return hci_ssp_supported(connection) ? 1 : 0; 7254 } 7255 7256 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 7257 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 7258 } 7259 7260 /** 7261 * Check if remote supported features query has completed 7262 */ 7263 bool hci_remote_features_available(hci_con_handle_t handle){ 7264 hci_connection_t * connection = hci_connection_for_handle(handle); 7265 if (!connection) return false; 7266 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 7267 } 7268 7269 /** 7270 * Trigger remote supported features query 7271 */ 7272 7273 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 7274 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 7275 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 7276 } 7277 } 7278 7279 void hci_remote_features_query(hci_con_handle_t con_handle){ 7280 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7281 if (!connection) return; 7282 hci_trigger_remote_features_for_connection(connection); 7283 hci_run(); 7284 } 7285 7286 // GAP API 7287 /** 7288 * @bbrief enable/disable bonding. default is enabled 7289 * @praram enabled 7290 */ 7291 void gap_set_bondable_mode(int enable){ 7292 hci_stack->bondable = enable ? 1 : 0; 7293 } 7294 /** 7295 * @brief Get bondable mode. 7296 * @return 1 if bondable 7297 */ 7298 int gap_get_bondable_mode(void){ 7299 return hci_stack->bondable; 7300 } 7301 7302 /** 7303 * @brief map link keys to security levels 7304 */ 7305 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 7306 switch (link_key_type){ 7307 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7308 return LEVEL_4; 7309 case COMBINATION_KEY: 7310 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7311 return LEVEL_3; 7312 default: 7313 return LEVEL_2; 7314 } 7315 } 7316 7317 /** 7318 * @brief map link keys to secure connection yes/no 7319 */ 7320 bool gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 7321 switch (link_key_type){ 7322 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7323 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7324 return true; 7325 default: 7326 return false; 7327 } 7328 } 7329 7330 /** 7331 * @brief map link keys to authenticated 7332 */ 7333 bool gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 7334 switch (link_key_type){ 7335 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 7336 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 7337 return true; 7338 default: 7339 return false; 7340 } 7341 } 7342 7343 bool gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 7344 log_info("gap_mitm_protection_required_for_security_level %u", level); 7345 return level > LEVEL_2; 7346 } 7347 7348 /** 7349 * @brief get current security level 7350 */ 7351 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 7352 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7353 if (!connection) return LEVEL_0; 7354 return gap_security_level_for_connection(connection); 7355 } 7356 7357 /** 7358 * @brief request connection to device to 7359 * @result GAP_AUTHENTICATION_RESULT 7360 */ 7361 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 7362 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7363 if (!connection){ 7364 hci_emit_security_level(con_handle, LEVEL_0); 7365 return; 7366 } 7367 7368 btstack_assert(hci_is_le_connection(connection) == false); 7369 7370 // Core Spec 5.2, GAP 5.2.2: "When in Secure Connections Only mode, all services (except those allowed to have Security Mode 4, Level 0) 7371 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 7372 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 7373 requested_level = LEVEL_4; 7374 } 7375 7376 gap_security_level_t current_level = gap_security_level(con_handle); 7377 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 7378 requested_level, connection->requested_security_level, current_level); 7379 7380 // authentication active if authentication request was sent or planned level > 0 7381 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 7382 if (authentication_active){ 7383 // authentication already active 7384 if (connection->requested_security_level < requested_level){ 7385 // increase requested level as new level is higher 7386 // TODO: handle re-authentication when done 7387 connection->requested_security_level = requested_level; 7388 } 7389 } else { 7390 // no request active, notify if security sufficient 7391 if (requested_level <= current_level){ 7392 hci_emit_security_level(con_handle, current_level); 7393 return; 7394 } 7395 7396 // store request 7397 connection->requested_security_level = requested_level; 7398 7399 // start to authenticate connection 7400 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 7401 7402 // request remote features if not already active, also trigger hci_run 7403 hci_remote_features_query(con_handle); 7404 } 7405 } 7406 7407 /** 7408 * @brief start dedicated bonding with device. disconnect after bonding 7409 * @param device 7410 * @param request MITM protection 7411 * @result GAP_DEDICATED_BONDING_COMPLETE 7412 */ 7413 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 7414 7415 // create connection state machine 7416 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 7417 7418 if (!connection){ 7419 return BTSTACK_MEMORY_ALLOC_FAILED; 7420 } 7421 7422 // delete linkn key 7423 gap_drop_link_key_for_bd_addr(device); 7424 7425 // configure LEVEL_2/3, dedicated bonding 7426 connection->state = SEND_CREATE_CONNECTION; 7427 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 7428 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 7429 connection->bonding_flags = BONDING_DEDICATED; 7430 7431 // wait for GAP Security Result and send GAP Dedicated Bonding complete 7432 7433 // handle: connnection failure (connection complete != ok) 7434 // handle: authentication failure 7435 // handle: disconnect on done 7436 7437 hci_run(); 7438 7439 return 0; 7440 } 7441 7442 void gap_set_local_name(const char * local_name){ 7443 hci_stack->local_name = local_name; 7444 hci_stack->gap_tasks_classic |= GAP_TASK_SET_LOCAL_NAME; 7445 // also update EIR if not set by user 7446 if (hci_stack->eir_data == NULL){ 7447 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 7448 } 7449 hci_run(); 7450 } 7451 #endif 7452 7453 7454 #ifdef ENABLE_BLE 7455 7456 #ifdef ENABLE_LE_CENTRAL 7457 void gap_start_scan(void){ 7458 hci_stack->le_scanning_enabled = true; 7459 hci_run(); 7460 } 7461 7462 void gap_stop_scan(void){ 7463 hci_stack->le_scanning_enabled = false; 7464 hci_run(); 7465 } 7466 7467 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 7468 hci_stack->le_scan_type = scan_type; 7469 hci_stack->le_scan_filter_policy = scanning_filter_policy; 7470 hci_stack->le_scan_interval = scan_interval; 7471 hci_stack->le_scan_window = scan_window; 7472 hci_stack->le_scanning_param_update = true; 7473 hci_run(); 7474 } 7475 7476 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 7477 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 7478 } 7479 7480 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 7481 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 7482 if (!conn){ 7483 // disallow if le connection is already outgoing 7484 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 7485 log_error("le connection already active"); 7486 return ERROR_CODE_COMMAND_DISALLOWED; 7487 } 7488 7489 log_info("gap_connect: no connection exists yet, creating context"); 7490 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 7491 if (!conn){ 7492 // notify client that alloc failed 7493 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 7494 log_info("gap_connect: failed to alloc hci_connection_t"); 7495 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 7496 } 7497 7498 // set le connecting state 7499 if (hci_is_le_connection_type(addr_type)){ 7500 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 7501 } 7502 7503 conn->state = SEND_CREATE_CONNECTION; 7504 log_info("gap_connect: send create connection next"); 7505 hci_run(); 7506 return ERROR_CODE_SUCCESS; 7507 } 7508 7509 if (!hci_is_le_connection(conn) || 7510 (conn->state == SEND_CREATE_CONNECTION) || 7511 (conn->state == SENT_CREATE_CONNECTION)) { 7512 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 7513 log_error("gap_connect: classic connection or connect is already being created"); 7514 return GATT_CLIENT_IN_WRONG_STATE; 7515 } 7516 7517 // check if connection was just disconnected 7518 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7519 log_info("gap_connect: send create connection (again)"); 7520 conn->state = SEND_CREATE_CONNECTION; 7521 hci_run(); 7522 return ERROR_CODE_SUCCESS; 7523 } 7524 7525 log_info("gap_connect: context exists with state %u", conn->state); 7526 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 7527 hci_run(); 7528 return ERROR_CODE_SUCCESS; 7529 } 7530 7531 // @assumption: only a single outgoing LE Connection exists 7532 static hci_connection_t * gap_get_outgoing_connection(void){ 7533 btstack_linked_item_t *it; 7534 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 7535 hci_connection_t * conn = (hci_connection_t *) it; 7536 if (!hci_is_le_connection(conn)) continue; 7537 switch (conn->state){ 7538 case SEND_CREATE_CONNECTION: 7539 case SENT_CREATE_CONNECTION: 7540 return conn; 7541 default: 7542 break; 7543 }; 7544 } 7545 return NULL; 7546 } 7547 7548 uint8_t gap_connect_cancel(void){ 7549 hci_connection_t * conn; 7550 switch (hci_stack->le_connecting_request){ 7551 case LE_CONNECTING_IDLE: 7552 break; 7553 case LE_CONNECTING_WHITELIST: 7554 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7555 hci_run(); 7556 break; 7557 case LE_CONNECTING_DIRECT: 7558 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 7559 conn = gap_get_outgoing_connection(); 7560 if (conn == NULL){ 7561 hci_run(); 7562 } else { 7563 switch (conn->state){ 7564 case SEND_CREATE_CONNECTION: 7565 // skip sending create connection and emit event instead 7566 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 7567 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 7568 btstack_memory_hci_connection_free( conn ); 7569 break; 7570 case SENT_CREATE_CONNECTION: 7571 // let hci_run_general_gap_le cancel outgoing connection 7572 hci_run(); 7573 break; 7574 default: 7575 break; 7576 } 7577 } 7578 break; 7579 default: 7580 btstack_unreachable(); 7581 break; 7582 } 7583 return ERROR_CODE_SUCCESS; 7584 } 7585 7586 /** 7587 * @brief Set connection parameters for outgoing connections 7588 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 7589 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 7590 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 7591 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 7592 * @param conn_latency, default: 4 7593 * @param supervision_timeout (unit: 10ms), default: 720 ms 7594 * @param min_ce_length (unit: 0.625ms), default: 10 ms 7595 * @param max_ce_length (unit: 0.625ms), default: 30 ms 7596 */ 7597 7598 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 7599 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 7600 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 7601 hci_stack->le_connection_scan_interval = conn_scan_interval; 7602 hci_stack->le_connection_scan_window = conn_scan_window; 7603 hci_stack->le_connection_interval_min = conn_interval_min; 7604 hci_stack->le_connection_interval_max = conn_interval_max; 7605 hci_stack->le_connection_latency = conn_latency; 7606 hci_stack->le_supervision_timeout = supervision_timeout; 7607 hci_stack->le_minimum_ce_length = min_ce_length; 7608 hci_stack->le_maximum_ce_length = max_ce_length; 7609 } 7610 #endif 7611 7612 /** 7613 * @brief Updates the connection parameters for a given LE connection 7614 * @param handle 7615 * @param conn_interval_min (unit: 1.25ms) 7616 * @param conn_interval_max (unit: 1.25ms) 7617 * @param conn_latency 7618 * @param supervision_timeout (unit: 10ms) 7619 * @return 0 if ok 7620 */ 7621 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7622 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7623 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7624 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7625 connection->le_conn_interval_min = conn_interval_min; 7626 connection->le_conn_interval_max = conn_interval_max; 7627 connection->le_conn_latency = conn_latency; 7628 connection->le_supervision_timeout = supervision_timeout; 7629 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 7630 hci_run(); 7631 return 0; 7632 } 7633 7634 /** 7635 * @brief Request an update of the connection parameter for a given LE connection 7636 * @param handle 7637 * @param conn_interval_min (unit: 1.25ms) 7638 * @param conn_interval_max (unit: 1.25ms) 7639 * @param conn_latency 7640 * @param supervision_timeout (unit: 10ms) 7641 * @return 0 if ok 7642 */ 7643 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 7644 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 7645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 7646 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7647 connection->le_conn_interval_min = conn_interval_min; 7648 connection->le_conn_interval_max = conn_interval_max; 7649 connection->le_conn_latency = conn_latency; 7650 connection->le_supervision_timeout = supervision_timeout; 7651 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 7652 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 7653 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 7654 return 0; 7655 } 7656 7657 #ifdef ENABLE_LE_PERIPHERAL 7658 7659 /** 7660 * @brief Set Advertisement Data 7661 * @param advertising_data_length 7662 * @param advertising_data (max 31 octets) 7663 * @note data is not copied, pointer has to stay valid 7664 */ 7665 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 7666 hci_stack->le_advertisements_data_len = advertising_data_length; 7667 hci_stack->le_advertisements_data = advertising_data; 7668 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7669 hci_run(); 7670 } 7671 7672 /** 7673 * @brief Set Scan Response Data 7674 * @param advertising_data_length 7675 * @param advertising_data (max 31 octets) 7676 * @note data is not copied, pointer has to stay valid 7677 */ 7678 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 7679 hci_stack->le_scan_response_data_len = scan_response_data_length; 7680 hci_stack->le_scan_response_data = scan_response_data; 7681 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7682 hci_run(); 7683 } 7684 7685 /** 7686 * @brief Set Advertisement Parameters 7687 * @param adv_int_min 7688 * @param adv_int_max 7689 * @param adv_type 7690 * @param direct_address_type 7691 * @param direct_address 7692 * @param channel_map 7693 * @param filter_policy 7694 * 7695 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 7696 */ 7697 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 7698 uint8_t direct_address_typ, bd_addr_t direct_address, 7699 uint8_t channel_map, uint8_t filter_policy) { 7700 7701 hci_stack->le_advertisements_interval_min = adv_int_min; 7702 hci_stack->le_advertisements_interval_max = adv_int_max; 7703 hci_stack->le_advertisements_type = adv_type; 7704 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 7705 hci_stack->le_advertisements_channel_map = channel_map; 7706 hci_stack->le_advertisements_filter_policy = filter_policy; 7707 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 7708 6); 7709 7710 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7711 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_PARAMS_SET; 7712 hci_run(); 7713 } 7714 7715 /** 7716 * @brief Enable/Disable Advertisements 7717 * @param enabled 7718 */ 7719 void gap_advertisements_enable(int enabled){ 7720 if (enabled == 0){ 7721 hci_stack->le_advertisements_state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7722 } else { 7723 hci_stack->le_advertisements_state |= LE_ADVERTISEMENT_STATE_ENABLED; 7724 } 7725 hci_update_advertisements_enabled_for_current_roles(); 7726 hci_run(); 7727 } 7728 7729 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 7730 static le_advertising_set_t * hci_advertising_set_for_handle(uint8_t advertising_handle){ 7731 btstack_linked_list_iterator_t it; 7732 btstack_linked_list_iterator_init(&it, &hci_stack->le_advertising_sets); 7733 while (btstack_linked_list_iterator_has_next(&it)){ 7734 le_advertising_set_t * item = (le_advertising_set_t *) btstack_linked_list_iterator_next(&it); 7735 if ( item->advertising_handle == advertising_handle ) { 7736 return item; 7737 } 7738 } 7739 return NULL; 7740 } 7741 7742 uint8_t gap_extended_advertising_setup(le_advertising_set_t * storage, const le_extended_advertising_parameters_t * advertising_parameters, uint8_t * out_advertising_handle){ 7743 // find free advertisement handle 7744 uint8_t advertisement_handle; 7745 for (advertisement_handle = 1; advertisement_handle <= LE_EXTENDED_ADVERTISING_MAX_HANDLE; advertisement_handle++){ 7746 if (hci_advertising_set_for_handle(advertisement_handle) == NULL) break; 7747 } 7748 if (advertisement_handle > LE_EXTENDED_ADVERTISING_MAX_HANDLE) return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 7749 // clear 7750 memset(storage, 0, sizeof(le_advertising_set_t)); 7751 // copy params 7752 storage->advertising_handle = advertisement_handle; 7753 memcpy(&storage->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7754 // add to list 7755 bool add_ok = btstack_linked_list_add(&hci_stack->le_advertising_sets, (btstack_linked_item_t *) storage); 7756 if (!add_ok) return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 7757 *out_advertising_handle = advertisement_handle; 7758 // set tasks and start 7759 storage->tasks = LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7760 hci_run(); 7761 return ERROR_CODE_SUCCESS; 7762 } 7763 7764 uint8_t gap_extended_advertising_set_params(uint8_t advertising_handle, const le_extended_advertising_parameters_t * advertising_parameters){ 7765 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7766 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7767 memcpy(&advertising_set->extended_params, advertising_parameters, sizeof(le_extended_advertising_parameters_t)); 7768 // set tasks and start 7769 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7770 hci_run(); 7771 return ERROR_CODE_SUCCESS; 7772 } 7773 7774 uint8_t gap_extended_advertising_get_params(uint8_t advertising_handle, le_extended_advertising_parameters_t * advertising_parameters){ 7775 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7776 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7777 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_extended_advertising_parameters_t)); 7778 return ERROR_CODE_SUCCESS; 7779 } 7780 7781 uint8_t gap_extended_advertising_set_random_address(uint8_t advertising_handle, bd_addr_t random_address){ 7782 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7783 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7784 memcpy(advertising_set->random_address, random_address, 6); 7785 // set tasks and start 7786 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7787 hci_run(); 7788 return ERROR_CODE_SUCCESS; 7789 } 7790 7791 uint8_t gap_extended_advertising_set_adv_data(uint8_t advertising_handle, uint16_t advertising_data_length, const uint8_t * advertising_data){ 7792 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7793 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7794 advertising_set->adv_data = advertising_data; 7795 advertising_set->adv_data_len = advertising_data_length; 7796 // set tasks and start 7797 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 7798 hci_run(); 7799 return ERROR_CODE_SUCCESS; 7800 } 7801 7802 uint8_t gap_extended_advertising_set_scan_response_data(uint8_t advertising_handle, uint16_t scan_response_data_length, const uint8_t * scan_response_data){ 7803 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7804 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7805 advertising_set->scan_data = scan_response_data; 7806 advertising_set->scan_data_len = scan_response_data_length; 7807 // set tasks and start 7808 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 7809 hci_run(); 7810 return ERROR_CODE_SUCCESS; 7811 } 7812 7813 uint8_t gap_extended_advertising_start(uint8_t advertising_handle, uint16_t timeout, uint8_t num_extended_advertising_events){ 7814 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7815 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7816 advertising_set->enable_timeout = timeout; 7817 advertising_set->enable_max_scan_events = num_extended_advertising_events; 7818 // set tasks and start 7819 advertising_set->state |= LE_ADVERTISEMENT_STATE_ENABLED; 7820 hci_run(); 7821 return ERROR_CODE_SUCCESS; 7822 } 7823 7824 uint8_t gap_extended_advertising_stop(uint8_t advertising_handle){ 7825 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7826 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7827 // set tasks and start 7828 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_ENABLED; 7829 hci_run(); 7830 return ERROR_CODE_SUCCESS; 7831 } 7832 7833 uint8_t gap_extended_advertising_remove(uint8_t advertising_handle){ 7834 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7835 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7836 // set tasks and start 7837 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_REMOVE_SET; 7838 hci_run(); 7839 return ERROR_CODE_SUCCESS; 7840 } 7841 7842 #ifdef ENABLE_LE_PERIODIC_ADVERTISING 7843 uint8_t gap_periodic_advertising_set_params(uint8_t advertising_handle, const le_periodic_advertising_parameters_t * advertising_parameters){ 7844 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7845 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7846 // periodic advertising requires neither connectable, scannable, legacy or anonymous 7847 if ((advertising_set->extended_params.advertising_event_properties & 0x1f) != 0) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 7848 memcpy(&advertising_set->periodic_params, advertising_parameters, sizeof(le_periodic_advertising_parameters_t)); 7849 // set tasks and start 7850 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_PARAMS; 7851 hci_run(); 7852 return ERROR_CODE_SUCCESS; 7853 } 7854 7855 uint8_t gap_periodic_advertising_get_params(uint8_t advertising_handle, le_periodic_advertising_parameters_t * advertising_parameters){ 7856 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7857 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7858 memcpy(advertising_parameters, &advertising_set->extended_params, sizeof(le_periodic_advertising_parameters_t)); 7859 return ERROR_CODE_SUCCESS; 7860 } 7861 7862 uint8_t gap_periodic_advertising_set_data(uint8_t advertising_handle, uint16_t periodic_data_length, const uint8_t * periodic_data){ 7863 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7864 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7865 advertising_set->periodic_data = periodic_data; 7866 advertising_set->periodic_data_len = periodic_data_length; 7867 // set tasks and start 7868 advertising_set->tasks |= LE_ADVERTISEMENT_TASKS_SET_PERIODIC_DATA; 7869 hci_run(); 7870 return ERROR_CODE_SUCCESS; 7871 } 7872 7873 uint8_t gap_periodic_advertising_start(uint8_t advertising_handle, bool include_adi){ 7874 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7875 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7876 // set tasks and start 7877 advertising_set->periodic_include_adi = include_adi; 7878 advertising_set->state |= LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7879 hci_run(); 7880 return ERROR_CODE_SUCCESS; 7881 } 7882 7883 uint8_t gap_periodic_advertising_stop(uint8_t advertising_handle){ 7884 le_advertising_set_t * advertising_set = hci_advertising_set_for_handle(advertising_handle); 7885 if (advertising_set == NULL) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7886 // set tasks and start 7887 advertising_set->state &= ~LE_ADVERTISEMENT_STATE_PERIODIC_ENABLED; 7888 hci_run(); 7889 return ERROR_CODE_SUCCESS; 7890 } 7891 #endif /* ENABLE_LE_PERIODIC_ADVERTISING */ 7892 7893 #endif 7894 7895 #endif 7896 7897 void hci_le_set_own_address_type(uint8_t own_address_type){ 7898 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 7899 if (own_address_type == hci_stack->le_own_addr_type) return; 7900 hci_stack->le_own_addr_type = own_address_type; 7901 7902 #ifdef ENABLE_LE_PERIPHERAL 7903 // update advertisement parameters, too 7904 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 7905 hci_run(); 7906 #endif 7907 #ifdef ENABLE_LE_CENTRAL 7908 // note: we don't update scan parameters or modify ongoing connection attempts 7909 #endif 7910 } 7911 7912 void hci_le_random_address_set(const bd_addr_t random_address){ 7913 memcpy(hci_stack->le_random_address, random_address, 6); 7914 hci_stack->le_random_address_set = true; 7915 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 7916 hci_run(); 7917 } 7918 7919 #endif 7920 7921 uint8_t gap_disconnect(hci_con_handle_t handle){ 7922 hci_connection_t * conn = hci_connection_for_handle(handle); 7923 if (!conn){ 7924 hci_emit_disconnection_complete(handle, 0); 7925 return 0; 7926 } 7927 // ignore if already disconnected 7928 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 7929 return 0; 7930 } 7931 conn->state = SEND_DISCONNECT; 7932 hci_run(); 7933 return 0; 7934 } 7935 7936 int gap_read_rssi(hci_con_handle_t con_handle){ 7937 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 7938 if (hci_connection == NULL) return 0; 7939 hci_connection->gap_connection_tasks |= GAP_CONNECTION_TASK_READ_RSSI; 7940 hci_run(); 7941 return 1; 7942 } 7943 7944 /** 7945 * @brief Get connection type 7946 * @param con_handle 7947 * @result connection_type 7948 */ 7949 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 7950 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7951 if (!conn) return GAP_CONNECTION_INVALID; 7952 switch (conn->address_type){ 7953 case BD_ADDR_TYPE_LE_PUBLIC: 7954 case BD_ADDR_TYPE_LE_RANDOM: 7955 return GAP_CONNECTION_LE; 7956 case BD_ADDR_TYPE_SCO: 7957 return GAP_CONNECTION_SCO; 7958 case BD_ADDR_TYPE_ACL: 7959 return GAP_CONNECTION_ACL; 7960 default: 7961 return GAP_CONNECTION_INVALID; 7962 } 7963 } 7964 7965 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 7966 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 7967 if (!conn) return HCI_ROLE_INVALID; 7968 return (hci_role_t) conn->role; 7969 } 7970 7971 7972 #ifdef ENABLE_CLASSIC 7973 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 7974 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7975 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7976 conn->request_role = role; 7977 hci_run(); 7978 return ERROR_CODE_SUCCESS; 7979 } 7980 #endif 7981 7982 #ifdef ENABLE_BLE 7983 7984 uint8_t gap_le_set_phy(hci_con_handle_t con_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 7985 hci_connection_t * conn = hci_connection_for_handle(con_handle); 7986 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 7987 7988 conn->le_phy_update_all_phys = all_phys; 7989 conn->le_phy_update_tx_phys = tx_phys; 7990 conn->le_phy_update_rx_phys = rx_phys; 7991 conn->le_phy_update_phy_options = phy_options; 7992 7993 hci_run(); 7994 7995 return 0; 7996 } 7997 7998 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 7999 // check if already in list 8000 btstack_linked_list_iterator_t it; 8001 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8002 while (btstack_linked_list_iterator_has_next(&it)) { 8003 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 8004 if (entry->address_type != address_type) { 8005 continue; 8006 } 8007 if (memcmp(entry->address, address, 6) != 0) { 8008 continue; 8009 } 8010 // disallow if already scheduled to add 8011 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 8012 return ERROR_CODE_COMMAND_DISALLOWED; 8013 } 8014 // still on controller, but scheduled to remove -> re-add 8015 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 8016 return ERROR_CODE_SUCCESS; 8017 } 8018 // alloc and add to list 8019 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 8020 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8021 entry->address_type = address_type; 8022 (void)memcpy(entry->address, address, 6); 8023 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 8024 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 8025 return ERROR_CODE_SUCCESS; 8026 } 8027 8028 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8029 btstack_linked_list_iterator_t it; 8030 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8031 while (btstack_linked_list_iterator_has_next(&it)){ 8032 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8033 if (entry->address_type != address_type) { 8034 continue; 8035 } 8036 if (memcmp(entry->address, address, 6) != 0) { 8037 continue; 8038 } 8039 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8040 // remove from controller if already present 8041 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8042 } else { 8043 // directly remove entry from whitelist 8044 btstack_linked_list_iterator_remove(&it); 8045 btstack_memory_whitelist_entry_free(entry); 8046 } 8047 return ERROR_CODE_SUCCESS; 8048 } 8049 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8050 } 8051 8052 static void hci_whitelist_clear(void){ 8053 btstack_linked_list_iterator_t it; 8054 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 8055 while (btstack_linked_list_iterator_has_next(&it)){ 8056 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 8057 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 8058 // remove from controller if already present 8059 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 8060 continue; 8061 } 8062 // directly remove entry from whitelist 8063 btstack_linked_list_iterator_remove(&it); 8064 btstack_memory_whitelist_entry_free(entry); 8065 } 8066 } 8067 8068 // free all entries unconditionally 8069 static void hci_whitelist_free(void){ 8070 btstack_linked_list_iterator_t lit; 8071 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 8072 while (btstack_linked_list_iterator_has_next(&lit)){ 8073 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 8074 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 8075 btstack_memory_whitelist_entry_free(entry); 8076 } 8077 } 8078 8079 /** 8080 * @brief Clear Whitelist 8081 * @return 0 if ok 8082 */ 8083 uint8_t gap_whitelist_clear(void){ 8084 hci_whitelist_clear(); 8085 hci_run(); 8086 return ERROR_CODE_SUCCESS; 8087 } 8088 8089 /** 8090 * @brief Add Device to Whitelist 8091 * @param address_typ 8092 * @param address 8093 * @return 0 if ok 8094 */ 8095 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 8096 uint8_t status = hci_whitelist_add(address_type, address); 8097 if (status){ 8098 return status; 8099 } 8100 hci_run(); 8101 return ERROR_CODE_SUCCESS; 8102 } 8103 8104 /** 8105 * @brief Remove Device from Whitelist 8106 * @param address_typ 8107 * @param address 8108 * @return 0 if ok 8109 */ 8110 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 8111 uint8_t status = hci_whitelist_remove(address_type, address); 8112 if (status){ 8113 return status; 8114 } 8115 hci_run(); 8116 return ERROR_CODE_SUCCESS; 8117 } 8118 8119 #ifdef ENABLE_LE_CENTRAL 8120 /** 8121 * @brief Connect with Whitelist 8122 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 8123 * @return - if ok 8124 */ 8125 uint8_t gap_connect_with_whitelist(void){ 8126 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 8127 return ERROR_CODE_COMMAND_DISALLOWED; 8128 } 8129 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8130 hci_run(); 8131 return ERROR_CODE_SUCCESS; 8132 } 8133 8134 /** 8135 * @brief Auto Connection Establishment - Start Connecting to device 8136 * @param address_typ 8137 * @param address 8138 * @return 0 if ok 8139 */ 8140 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 8141 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8142 return ERROR_CODE_COMMAND_DISALLOWED; 8143 } 8144 8145 uint8_t status = hci_whitelist_add(address_type, address); 8146 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 8147 return status; 8148 } 8149 8150 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 8151 8152 hci_run(); 8153 return ERROR_CODE_SUCCESS; 8154 } 8155 8156 /** 8157 * @brief Auto Connection Establishment - Stop Connecting to device 8158 * @param address_typ 8159 * @param address 8160 * @return 0 if ok 8161 */ 8162 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 8163 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 8164 return ERROR_CODE_COMMAND_DISALLOWED; 8165 } 8166 8167 hci_whitelist_remove(address_type, address); 8168 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 8169 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8170 } 8171 hci_run(); 8172 return 0; 8173 } 8174 8175 /** 8176 * @brief Auto Connection Establishment - Stop everything 8177 * @note Convenience function to stop all active auto connection attempts 8178 */ 8179 uint8_t gap_auto_connection_stop_all(void){ 8180 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 8181 return ERROR_CODE_COMMAND_DISALLOWED; 8182 } 8183 hci_whitelist_clear(); 8184 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 8185 hci_run(); 8186 return ERROR_CODE_SUCCESS; 8187 } 8188 8189 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 8190 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8191 if (!conn) return 0; 8192 return conn->le_connection_interval; 8193 } 8194 #endif 8195 #endif 8196 8197 #ifdef ENABLE_CLASSIC 8198 /** 8199 * @brief Set Extended Inquiry Response data 8200 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 8201 * @note has to be done before stack starts up 8202 */ 8203 void gap_set_extended_inquiry_response(const uint8_t * data){ 8204 hci_stack->eir_data = data; 8205 hci_stack->gap_tasks_classic |= GAP_TASK_SET_EIR_DATA; 8206 hci_run(); 8207 } 8208 8209 /** 8210 * @brief Start GAP Classic Inquiry 8211 * @param duration in 1.28s units 8212 * @return 0 if ok 8213 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 8214 */ 8215 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 8216 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8217 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8218 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 8219 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8220 } 8221 hci_stack->inquiry_state = duration_in_1280ms_units; 8222 hci_stack->inquiry_max_period_length = 0; 8223 hci_stack->inquiry_min_period_length = 0; 8224 hci_run(); 8225 return 0; 8226 } 8227 8228 uint8_t gap_inquiry_periodic_start(uint8_t duration, uint16_t max_period_length, uint16_t min_period_length){ 8229 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 8230 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8231 if (duration < GAP_INQUIRY_DURATION_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8232 if (duration > GAP_INQUIRY_DURATION_MAX) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 8233 if (max_period_length < GAP_INQUIRY_MAX_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8234 if (min_period_length < GAP_INQUIRY_MIN_PERIODIC_LEN_MIN) return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS;; 8235 8236 hci_stack->inquiry_state = duration; 8237 hci_stack->inquiry_max_period_length = max_period_length; 8238 hci_stack->inquiry_min_period_length = min_period_length; 8239 hci_run(); 8240 return 0; 8241 } 8242 8243 /** 8244 * @brief Stop GAP Classic Inquiry 8245 * @return 0 if ok 8246 */ 8247 int gap_inquiry_stop(void){ 8248 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 8249 // emit inquiry complete event, before it even started 8250 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 8251 hci_emit_event(event, sizeof(event), 1); 8252 return 0; 8253 } 8254 switch (hci_stack->inquiry_state){ 8255 case GAP_INQUIRY_STATE_ACTIVE: 8256 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 8257 hci_run(); 8258 return ERROR_CODE_SUCCESS; 8259 case GAP_INQUIRY_STATE_PERIODIC: 8260 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_EXIT_PERIODIC; 8261 hci_run(); 8262 return ERROR_CODE_SUCCESS; 8263 default: 8264 return ERROR_CODE_COMMAND_DISALLOWED; 8265 } 8266 } 8267 8268 void gap_inquiry_set_lap(uint32_t lap){ 8269 hci_stack->inquiry_lap = lap; 8270 } 8271 8272 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 8273 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 8274 hci_stack->inquiry_scan_window = inquiry_scan_window; 8275 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 8276 hci_run(); 8277 } 8278 8279 8280 /** 8281 * @brief Remote Name Request 8282 * @param addr 8283 * @param page_scan_repetition_mode 8284 * @param clock_offset only used when bit 15 is set 8285 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 8286 */ 8287 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 8288 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8289 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 8290 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 8291 hci_stack->remote_name_clock_offset = clock_offset; 8292 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 8293 hci_run(); 8294 return 0; 8295 } 8296 8297 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 8298 hci_stack->gap_pairing_state = state; 8299 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 8300 hci_run(); 8301 return 0; 8302 } 8303 8304 /** 8305 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 8306 * @param addr 8307 * @param pin_data 8308 * @param pin_len 8309 * @return 0 if ok 8310 */ 8311 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 8312 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8313 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 8314 hci_stack->gap_pairing_pin_len = pin_len; 8315 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 8316 } 8317 8318 /** 8319 * @brief Legacy Pairing Pin Code Response 8320 * @param addr 8321 * @param pin 8322 * @return 0 if ok 8323 */ 8324 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 8325 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, (uint8_t) strlen(pin)); 8326 } 8327 8328 /** 8329 * @brief Abort Legacy Pairing 8330 * @param addr 8331 * @param pin 8332 * @return 0 if ok 8333 */ 8334 int gap_pin_code_negative(bd_addr_t addr){ 8335 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8336 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 8337 } 8338 8339 /** 8340 * @brief SSP Passkey Response 8341 * @param addr 8342 * @param passkey 8343 * @return 0 if ok 8344 */ 8345 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 8346 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8347 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 8348 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 8349 } 8350 8351 /** 8352 * @brief Abort SSP Passkey Entry/Pairing 8353 * @param addr 8354 * @param pin 8355 * @return 0 if ok 8356 */ 8357 int gap_ssp_passkey_negative(const bd_addr_t addr){ 8358 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8359 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 8360 } 8361 8362 /** 8363 * @brief Accept SSP Numeric Comparison 8364 * @param addr 8365 * @param passkey 8366 * @return 0 if ok 8367 */ 8368 int gap_ssp_confirmation_response(const bd_addr_t addr){ 8369 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8370 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 8371 } 8372 8373 /** 8374 * @brief Abort SSP Numeric Comparison/Pairing 8375 * @param addr 8376 * @param pin 8377 * @return 0 if ok 8378 */ 8379 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 8380 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 8381 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 8382 } 8383 8384 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 8385 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 8386 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8387 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8388 connectionSetAuthenticationFlags(conn, flag); 8389 hci_run(); 8390 return ERROR_CODE_SUCCESS; 8391 } 8392 #endif 8393 8394 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 8395 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 8396 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 8397 } 8398 8399 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 8400 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 8401 } 8402 #endif 8403 8404 #ifdef ENABLE_CLASSIC_PAIRING_OOB 8405 /** 8406 * @brief Report Remote OOB Data 8407 * @param bd_addr 8408 * @param c_192 Simple Pairing Hash C derived from P-192 public key 8409 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 8410 * @param c_256 Simple Pairing Hash C derived from P-256 public key 8411 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 8412 */ 8413 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 8414 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8415 if (connection == NULL) { 8416 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8417 } 8418 connection->classic_oob_c_192 = c_192; 8419 connection->classic_oob_r_192 = r_192; 8420 8421 // ignore P-256 if not supported by us 8422 if (hci_stack->secure_connections_active){ 8423 connection->classic_oob_c_256 = c_256; 8424 connection->classic_oob_r_256 = r_256; 8425 } 8426 8427 return ERROR_CODE_SUCCESS; 8428 } 8429 /** 8430 * @brief Generate new OOB data 8431 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 8432 */ 8433 void gap_ssp_generate_oob_data(void){ 8434 hci_stack->classic_read_local_oob_data = true; 8435 hci_run(); 8436 } 8437 8438 #endif 8439 8440 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 8441 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 8442 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 8443 if (connection == NULL) { 8444 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8445 } 8446 8447 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 8448 connection->link_key_type = type; 8449 8450 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 8451 } 8452 8453 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 8454 /** 8455 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 8456 * @param inquiry_mode see bluetooth_defines.h 8457 */ 8458 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 8459 hci_stack->inquiry_mode = inquiry_mode; 8460 } 8461 8462 /** 8463 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 8464 */ 8465 void hci_set_sco_voice_setting(uint16_t voice_setting){ 8466 hci_stack->sco_voice_setting = voice_setting; 8467 } 8468 8469 /** 8470 * @brief Get SCO Voice Setting 8471 * @return current voice setting 8472 */ 8473 uint16_t hci_get_sco_voice_setting(void){ 8474 return hci_stack->sco_voice_setting; 8475 } 8476 8477 static int hci_have_usb_transport(void){ 8478 if (!hci_stack->hci_transport) return 0; 8479 const char * transport_name = hci_stack->hci_transport->name; 8480 if (!transport_name) return 0; 8481 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 8482 } 8483 8484 /** @brief Get SCO packet length for current SCO Voice setting 8485 * @note Using SCO packets of the exact length is required for USB transfer 8486 * @return Length of SCO packets in bytes (not audio frames) 8487 */ 8488 uint16_t hci_get_sco_packet_length(void){ 8489 uint16_t sco_packet_length = 0; 8490 8491 #ifdef ENABLE_SCO_OVER_HCI 8492 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8493 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8494 8495 if (hci_have_usb_transport()){ 8496 // see Core Spec for H2 USB Transfer. 8497 // 3 byte SCO header + 24 bytes per connection 8498 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 8499 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 8500 } else { 8501 // 3 byte SCO header + SCO packet size over the air (60 bytes) 8502 sco_packet_length = 3 + 60 * multiplier; 8503 // assert that it still fits inside an SCO buffer 8504 if (sco_packet_length > (hci_stack->sco_data_packet_length + 3)){ 8505 sco_packet_length = 3 + 60; 8506 } 8507 } 8508 #endif 8509 8510 #ifdef HAVE_SCO_TRANSPORT 8511 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 8512 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 8513 sco_packet_length = 3 + 60 * multiplier; 8514 #endif 8515 return sco_packet_length; 8516 } 8517 8518 /** 8519 * @brief Sets the master/slave policy 8520 * @param policy (0: attempt to become master, 1: let connecting device decide) 8521 */ 8522 void hci_set_master_slave_policy(uint8_t policy){ 8523 hci_stack->master_slave_policy = policy; 8524 } 8525 8526 #endif 8527 8528 HCI_STATE hci_get_state(void){ 8529 return hci_stack->state; 8530 } 8531 8532 #ifdef ENABLE_CLASSIC 8533 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 8534 hci_stack->gap_classic_accept_callback = accept_callback; 8535 } 8536 #endif 8537 8538 /** 8539 * @brief Set callback for Bluetooth Hardware Error 8540 */ 8541 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 8542 hci_stack->hardware_error_callback = fn; 8543 } 8544 8545 void hci_disconnect_all(void){ 8546 btstack_linked_list_iterator_t it; 8547 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 8548 while (btstack_linked_list_iterator_has_next(&it)){ 8549 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 8550 if (con->state == SENT_DISCONNECT) continue; 8551 con->state = SEND_DISCONNECT; 8552 } 8553 hci_run(); 8554 } 8555 8556 uint16_t hci_get_manufacturer(void){ 8557 return hci_stack->manufacturer; 8558 } 8559 8560 #ifdef ENABLE_BLE 8561 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 8562 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 8563 if (!hci_con) return NULL; 8564 return &hci_con->sm_connection; 8565 } 8566 8567 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 8568 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 8569 #endif 8570 8571 uint8_t gap_encryption_key_size(hci_con_handle_t con_handle){ 8572 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8573 if (hci_connection == NULL) return 0; 8574 if (hci_is_le_connection(hci_connection)){ 8575 #ifdef ENABLE_BLE 8576 sm_connection_t * sm_conn = &hci_connection->sm_connection; 8577 if (sm_conn->sm_connection_encrypted) { 8578 return sm_conn->sm_actual_encryption_key_size; 8579 } 8580 #endif 8581 } else { 8582 #ifdef ENABLE_CLASSIC 8583 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 8584 return hci_connection->encryption_key_size; 8585 } 8586 #endif 8587 } 8588 return 0; 8589 } 8590 8591 bool gap_authenticated(hci_con_handle_t con_handle){ 8592 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8593 if (hci_connection == NULL) return false; 8594 8595 switch (hci_connection->address_type){ 8596 #ifdef ENABLE_BLE 8597 case BD_ADDR_TYPE_LE_PUBLIC: 8598 case BD_ADDR_TYPE_LE_RANDOM: 8599 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 8600 return hci_connection->sm_connection.sm_connection_authenticated != 0; 8601 #endif 8602 #ifdef ENABLE_CLASSIC 8603 case BD_ADDR_TYPE_SCO: 8604 case BD_ADDR_TYPE_ACL: 8605 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 8606 #endif 8607 default: 8608 return false; 8609 } 8610 } 8611 8612 bool gap_secure_connection(hci_con_handle_t con_handle){ 8613 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8614 if (hci_connection == NULL) return 0; 8615 8616 switch (hci_connection->address_type){ 8617 #ifdef ENABLE_BLE 8618 case BD_ADDR_TYPE_LE_PUBLIC: 8619 case BD_ADDR_TYPE_LE_RANDOM: 8620 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return false; // unencrypted connection cannot be authenticated 8621 return hci_connection->sm_connection.sm_connection_sc != 0; 8622 #endif 8623 #ifdef ENABLE_CLASSIC 8624 case BD_ADDR_TYPE_SCO: 8625 case BD_ADDR_TYPE_ACL: 8626 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 8627 #endif 8628 default: 8629 return false; 8630 } 8631 } 8632 8633 bool gap_bonded(hci_con_handle_t con_handle){ 8634 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 8635 if (hci_connection == NULL) return 0; 8636 8637 #ifdef ENABLE_CLASSIC 8638 link_key_t link_key; 8639 link_key_type_t link_key_type; 8640 #endif 8641 switch (hci_connection->address_type){ 8642 #ifdef ENABLE_BLE 8643 case BD_ADDR_TYPE_LE_PUBLIC: 8644 case BD_ADDR_TYPE_LE_RANDOM: 8645 return hci_connection->sm_connection.sm_le_db_index >= 0; 8646 #endif 8647 #ifdef ENABLE_CLASSIC 8648 case BD_ADDR_TYPE_SCO: 8649 case BD_ADDR_TYPE_ACL: 8650 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 8651 #endif 8652 default: 8653 return false; 8654 } 8655 } 8656 8657 #ifdef ENABLE_BLE 8658 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 8659 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 8660 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 8661 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 8662 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 8663 return sm_conn->sm_connection_authorization_state; 8664 } 8665 #endif 8666 8667 #ifdef ENABLE_CLASSIC 8668 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 8669 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8670 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8671 conn->sniff_min_interval = sniff_min_interval; 8672 conn->sniff_max_interval = sniff_max_interval; 8673 conn->sniff_attempt = sniff_attempt; 8674 conn->sniff_timeout = sniff_timeout; 8675 hci_run(); 8676 return 0; 8677 } 8678 8679 /** 8680 * @brief Exit Sniff mode 8681 * @param con_handle 8682 @ @return 0 if ok 8683 */ 8684 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 8685 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8686 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8687 conn->sniff_min_interval = 0xffff; 8688 hci_run(); 8689 return 0; 8690 } 8691 8692 uint8_t gap_sniff_subrating_configure(hci_con_handle_t con_handle, uint16_t max_latency, uint16_t min_remote_timeout, uint16_t min_local_timeout){ 8693 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8694 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8695 conn->sniff_subrating_max_latency = max_latency; 8696 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 8697 conn->sniff_subrating_min_local_timeout = min_local_timeout; 8698 hci_run(); 8699 return ERROR_CODE_SUCCESS; 8700 } 8701 8702 uint8_t gap_qos_set(hci_con_handle_t con_handle, hci_service_type_t service_type, uint32_t token_rate, uint32_t peak_bandwidth, uint32_t latency, uint32_t delay_variation){ 8703 hci_connection_t * conn = hci_connection_for_handle(con_handle); 8704 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8705 conn->qos_service_type = service_type; 8706 conn->qos_token_rate = token_rate; 8707 conn->qos_peak_bandwidth = peak_bandwidth; 8708 conn->qos_latency = latency; 8709 conn->qos_delay_variation = delay_variation; 8710 hci_run(); 8711 return ERROR_CODE_SUCCESS; 8712 } 8713 8714 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 8715 hci_stack->new_page_scan_interval = page_scan_interval; 8716 hci_stack->new_page_scan_window = page_scan_window; 8717 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 8718 hci_run(); 8719 } 8720 8721 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 8722 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 8723 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 8724 hci_run(); 8725 } 8726 8727 void gap_set_page_timeout(uint16_t page_timeout){ 8728 hci_stack->page_timeout = page_timeout; 8729 hci_stack->gap_tasks_classic |= GAP_TASK_WRITE_PAGE_TIMEOUT; 8730 hci_run(); 8731 } 8732 8733 #endif 8734 8735 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 8736 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 8737 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8738 if (le_device_db_index >= le_device_db_max_count()) return; 8739 uint8_t offset = le_device_db_index >> 3; 8740 uint8_t mask = 1 << (le_device_db_index & 7); 8741 hci_stack->le_resolving_list_add_entries[offset] |= mask; 8742 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8743 // note: go back to remove entries, otherwise, a remove + add will skip the add 8744 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8745 } 8746 } 8747 8748 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 8749 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 8750 if (le_device_db_index >= le_device_db_max_count()) return; 8751 uint8_t offset = le_device_db_index >> 3; 8752 uint8_t mask = 1 << (le_device_db_index & 7); 8753 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 8754 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 8755 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 8756 } 8757 } 8758 8759 uint8_t gap_load_resolving_list_from_le_device_db(void){ 8760 if (hci_command_supported(SUPPORTED_HCI_COMMAND_LE_SET_ADDRESS_RESOLUTION_ENABLE) == false){ 8761 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 8762 } 8763 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 8764 // restart le resolving list update 8765 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 8766 } 8767 return ERROR_CODE_SUCCESS; 8768 } 8769 #endif 8770 8771 #ifdef ENABLE_BLE 8772 #ifdef ENABLE_LE_CENTRAL 8773 #ifdef ENABLE_LE_EXTENDED_ADVERTISING 8774 8775 static uint8_t hci_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8776 // check if already in list 8777 btstack_linked_list_iterator_t it; 8778 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8779 while (btstack_linked_list_iterator_has_next(&it)) { 8780 periodic_advertiser_list_entry_t *entry = (periodic_advertiser_list_entry_t *) btstack_linked_list_iterator_next(&it); 8781 if (entry->sid != advertising_sid) { 8782 continue; 8783 } 8784 if (entry->address_type != address_type) { 8785 continue; 8786 } 8787 if (memcmp(entry->address, address, 6) != 0) { 8788 continue; 8789 } 8790 // disallow if already scheduled to add 8791 if ((entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER) != 0){ 8792 return ERROR_CODE_COMMAND_DISALLOWED; 8793 } 8794 // still on controller, but scheduled to remove -> re-add 8795 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8796 return ERROR_CODE_SUCCESS; 8797 } 8798 // alloc and add to list 8799 periodic_advertiser_list_entry_t * entry = btstack_memory_periodic_advertiser_list_entry_get(); 8800 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 8801 entry->sid = advertising_sid; 8802 entry->address_type = address_type; 8803 (void)memcpy(entry->address, address, 6); 8804 entry->state = LE_PERIODIC_ADVERTISER_LIST_ENTRY_ADD_TO_CONTROLLER; 8805 btstack_linked_list_add(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t*) entry); 8806 return ERROR_CODE_SUCCESS; 8807 } 8808 8809 static uint8_t hci_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8810 btstack_linked_list_iterator_t it; 8811 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8812 while (btstack_linked_list_iterator_has_next(&it)){ 8813 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8814 if (entry->sid != advertising_sid) { 8815 continue; 8816 } 8817 if (entry->address_type != address_type) { 8818 continue; 8819 } 8820 if (memcmp(entry->address, address, 6) != 0) { 8821 continue; 8822 } 8823 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8824 // remove from controller if already present 8825 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8826 } else { 8827 // directly remove entry from whitelist 8828 btstack_linked_list_iterator_remove(&it); 8829 btstack_memory_periodic_advertiser_list_entry_free(entry); 8830 } 8831 return ERROR_CODE_SUCCESS; 8832 } 8833 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 8834 } 8835 8836 static void hci_periodic_advertiser_list_clear(void){ 8837 btstack_linked_list_iterator_t it; 8838 btstack_linked_list_iterator_init(&it, &hci_stack->le_periodic_advertiser_list); 8839 while (btstack_linked_list_iterator_has_next(&it)){ 8840 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&it); 8841 if (entry->state & LE_PERIODIC_ADVERTISER_LIST_ENTRY_ON_CONTROLLER){ 8842 // remove from controller if already present 8843 entry->state |= LE_PERIODIC_ADVERTISER_LIST_ENTRY_REMOVE_FROM_CONTROLLER; 8844 continue; 8845 } 8846 // directly remove entry from whitelist 8847 btstack_linked_list_iterator_remove(&it); 8848 btstack_memory_periodic_advertiser_list_entry_free(entry); 8849 } 8850 } 8851 8852 // free all entries unconditionally 8853 static void hci_periodic_advertiser_list_free(void){ 8854 btstack_linked_list_iterator_t lit; 8855 btstack_linked_list_iterator_init(&lit, &hci_stack->le_periodic_advertiser_list); 8856 while (btstack_linked_list_iterator_has_next(&lit)){ 8857 periodic_advertiser_list_entry_t * entry = (periodic_advertiser_list_entry_t*) btstack_linked_list_iterator_next(&lit); 8858 btstack_linked_list_remove(&hci_stack->le_periodic_advertiser_list, (btstack_linked_item_t *) entry); 8859 btstack_memory_periodic_advertiser_list_entry_free(entry); 8860 } 8861 } 8862 8863 uint8_t gap_periodic_advertiser_list_clear(void){ 8864 hci_periodic_advertiser_list_clear(); 8865 hci_run(); 8866 return ERROR_CODE_SUCCESS; 8867 } 8868 8869 uint8_t gap_periodic_advertiser_list_add(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8870 uint8_t status = hci_periodic_advertiser_list_add(address_type, address, advertising_sid); 8871 if (status){ 8872 return status; 8873 } 8874 hci_run(); 8875 return ERROR_CODE_SUCCESS; 8876 } 8877 8878 uint8_t gap_periodic_advertiser_list_remove(bd_addr_type_t address_type, const bd_addr_t address, uint8_t advertising_sid){ 8879 uint8_t status = hci_periodic_advertiser_list_remove(address_type, address, advertising_sid); 8880 if (status){ 8881 return status; 8882 } 8883 hci_run(); 8884 return ERROR_CODE_SUCCESS; 8885 } 8886 8887 uint8_t gap_periodic_advertising_create_sync(uint8_t options, uint8_t advertising_sid, bd_addr_type_t advertiser_address_type, 8888 bd_addr_t advertiser_address, uint16_t skip, uint16_t sync_timeout, uint8_t sync_cte_type){ 8889 // abort if already active 8890 if (hci_stack->le_periodic_sync_request != LE_CONNECTING_IDLE) { 8891 return ERROR_CODE_COMMAND_DISALLOWED; 8892 } 8893 // store request 8894 hci_stack->le_periodic_sync_request = ((options & 0) != 0) ? LE_CONNECTING_WHITELIST : LE_CONNECTING_DIRECT; 8895 hci_stack->le_periodic_sync_options = options; 8896 hci_stack->le_periodic_sync_advertising_sid = advertising_sid; 8897 hci_stack->le_periodic_sync_advertiser_address_type = advertiser_address_type; 8898 memcpy(hci_stack->le_periodic_sync_advertiser_address, advertiser_address, 6); 8899 hci_stack->le_periodic_sync_skip = skip; 8900 hci_stack->le_periodic_sync_timeout = sync_timeout; 8901 hci_stack->le_periodic_sync_cte_type = sync_cte_type; 8902 8903 hci_run(); 8904 return ERROR_CODE_SUCCESS; 8905 } 8906 8907 uint8_t gap_periodic_advertising_create_sync_cancel(void){ 8908 // abort if not requested 8909 if (hci_stack->le_periodic_sync_request == LE_CONNECTING_IDLE) { 8910 return ERROR_CODE_COMMAND_DISALLOWED; 8911 } 8912 hci_stack->le_periodic_sync_request = LE_CONNECTING_IDLE; 8913 hci_run(); 8914 return ERROR_CODE_SUCCESS; 8915 } 8916 8917 uint8_t gap_periodic_advertising_terminate_sync(uint16_t sync_handle){ 8918 if (hci_stack->le_periodic_terminate_sync_handle != HCI_CON_HANDLE_INVALID){ 8919 return ERROR_CODE_COMMAND_DISALLOWED; 8920 } 8921 hci_stack->le_periodic_terminate_sync_handle = sync_handle; 8922 hci_run(); 8923 return ERROR_CODE_SUCCESS; 8924 } 8925 8926 #endif 8927 #endif 8928 #ifdef ENABLE_LE_ISOCHRONOUS_STREAMS 8929 static uint8_t hci_iso_stream_create(hci_iso_type_t iso_type, hci_con_handle_t con_handle, uint8_t group_id) { 8930 hci_iso_stream_t * iso_stream = btstack_memory_hci_iso_stream_get(); 8931 if (iso_stream == NULL){ 8932 return ERROR_CODE_MEMORY_CAPACITY_EXCEEDED; 8933 } else { 8934 iso_stream->iso_type = iso_type; 8935 iso_stream->state = HCI_ISO_STREAM_STATE_REQUESTED; 8936 iso_stream->con_handle = con_handle; 8937 iso_stream->group_id = group_id; 8938 btstack_linked_list_add(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8939 return ERROR_CODE_SUCCESS; 8940 } 8941 } 8942 8943 static hci_iso_stream_t * hci_iso_stream_for_con_handle(hci_con_handle_t con_handle){ 8944 btstack_linked_list_iterator_t it; 8945 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8946 while (btstack_linked_list_iterator_has_next(&it)){ 8947 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8948 if (iso_stream->con_handle == con_handle ) { 8949 return iso_stream; 8950 } 8951 } 8952 return NULL; 8953 } 8954 8955 static void hci_iso_stream_finalize(hci_iso_stream_t * iso_stream){ 8956 log_info("hci_iso_stream_finalize con_handle 0x%04x, group_id 0x%02x", iso_stream->con_handle, iso_stream->group_id); 8957 btstack_linked_list_remove(&hci_stack->iso_streams, (btstack_linked_item_t*) iso_stream); 8958 btstack_memory_hci_iso_stream_free(iso_stream); 8959 } 8960 8961 static void hci_iso_stream_finalize_by_type_and_group_id(hci_iso_type_t iso_type, uint8_t group_id) { 8962 btstack_linked_list_iterator_t it; 8963 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8964 while (btstack_linked_list_iterator_has_next(&it)){ 8965 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8966 if ((iso_stream->group_id == group_id) && 8967 (iso_stream->iso_type == iso_type)){ 8968 btstack_linked_list_iterator_remove(&it); 8969 btstack_memory_hci_iso_stream_free(iso_stream); 8970 } 8971 } 8972 } 8973 8974 static void hci_iso_stream_requested_finalize(uint8_t group_id) { 8975 btstack_linked_list_iterator_t it; 8976 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8977 while (btstack_linked_list_iterator_has_next(&it)){ 8978 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8979 if ((iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) && 8980 (iso_stream->group_id == group_id)){ 8981 btstack_linked_list_iterator_remove(&it); 8982 btstack_memory_hci_iso_stream_free(iso_stream); 8983 } 8984 } 8985 } 8986 static void hci_iso_stream_requested_confirm(uint8_t big_handle){ 8987 btstack_linked_list_iterator_t it; 8988 btstack_linked_list_iterator_init(&it, &hci_stack->iso_streams); 8989 while (btstack_linked_list_iterator_has_next(&it)){ 8990 hci_iso_stream_t * iso_stream = (hci_iso_stream_t *) btstack_linked_list_iterator_next(&it); 8991 if ( iso_stream->state == HCI_ISO_STREAM_STATE_REQUESTED ) { 8992 iso_stream->state = HCI_ISO_STREAM_STATE_W4_ESTABLISHED; 8993 } 8994 } 8995 } 8996 8997 static bool hci_iso_sdu_complete(uint8_t * packet, uint16_t size){ 8998 uint8_t sdu_ts_flag = (packet[1] >> 6) & 1; 8999 uint16_t sdu_len_offset = 6 + (sdu_ts_flag * 4); 9000 uint16_t sdu_len = little_endian_read_16(packet, sdu_len_offset) & 0x0fff; 9001 return (sdu_len_offset + 2 + sdu_len) == size; 9002 } 9003 9004 static void hci_iso_packet_handler(uint8_t * packet, uint16_t size){ 9005 if (hci_stack->iso_packet_handler == NULL) { 9006 return; 9007 } 9008 if (size < 4) { 9009 return; 9010 } 9011 9012 // parse header 9013 uint16_t conn_handle_and_flags = little_endian_read_16(packet, 0); 9014 uint16_t iso_data_len = little_endian_read_16(packet, 2); 9015 hci_con_handle_t cis_handle = (hci_con_handle_t) (conn_handle_and_flags & 0xfff); 9016 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(cis_handle); 9017 uint8_t pb_flag = (conn_handle_and_flags >> 12) & 3; 9018 9019 // assert packet is complete 9020 if ((iso_data_len + 4u) != size){ 9021 return; 9022 } 9023 9024 if ((pb_flag & 0x01) == 0){ 9025 if (pb_flag == 0x02){ 9026 // The ISO_Data_Load field contains a header and a complete SDU. 9027 if (hci_iso_sdu_complete(packet, size)) { 9028 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, packet, size); 9029 } 9030 } else { 9031 // The ISO_Data_Load field contains a header and the first fragment of a fragmented SDU. 9032 if (iso_stream == NULL){ 9033 return; 9034 } 9035 if (size > HCI_ISO_PAYLOAD_SIZE){ 9036 return; 9037 } 9038 memcpy(iso_stream->reassembly_buffer, packet, size); 9039 // fix pb_flag 9040 iso_stream->reassembly_buffer[1] = (iso_stream->reassembly_buffer[1] & 0xcf) | 0x20; 9041 iso_stream->reassembly_pos = size; 9042 } 9043 } else { 9044 // iso_data_load contains continuation or last fragment of an SDU 9045 uint8_t ts_flag = (conn_handle_and_flags >> 14) & 1; 9046 if (ts_flag != 0){ 9047 return; 9048 } 9049 // append fragment 9050 if (iso_stream == NULL){ 9051 return; 9052 } 9053 if (iso_stream->reassembly_pos == 0){ 9054 return; 9055 } 9056 if ((iso_stream->reassembly_pos + iso_data_len) > size){ 9057 // reset reassembly buffer 9058 iso_stream->reassembly_pos = 0; 9059 return; 9060 } 9061 memcpy(&iso_stream->reassembly_buffer[iso_stream->reassembly_pos], &packet[4], iso_data_len); 9062 iso_stream->reassembly_pos += iso_data_len; 9063 9064 // deliver if last fragment and SDU complete 9065 if (pb_flag == 0x03){ 9066 if (hci_iso_sdu_complete(iso_stream->reassembly_buffer, iso_stream->reassembly_pos)){ 9067 (hci_stack->iso_packet_handler)(HCI_ISO_DATA_PACKET, 0, iso_stream->reassembly_buffer, iso_stream->reassembly_pos); 9068 } 9069 iso_stream->reassembly_pos = 0; 9070 } 9071 } 9072 } 9073 9074 static void hci_emit_big_created(const le_audio_big_t * big, uint8_t status){ 9075 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9076 uint16_t pos = 0; 9077 event[pos++] = HCI_EVENT_META_GAP; 9078 event[pos++] = 4 + (2 * big->num_bis); 9079 event[pos++] = GAP_SUBEVENT_BIG_CREATED; 9080 event[pos++] = status; 9081 event[pos++] = big->big_handle; 9082 event[pos++] = big->num_bis; 9083 uint8_t i; 9084 for (i=0;i<big->num_bis;i++){ 9085 little_endian_store_16(event, pos, big->bis_con_handles[i]); 9086 pos += 2; 9087 } 9088 hci_emit_event(event, pos, 0); 9089 } 9090 9091 static void hci_emit_big_terminated(const le_audio_big_t * big){ 9092 uint8_t event [4]; 9093 uint16_t pos = 0; 9094 event[pos++] = HCI_EVENT_META_GAP; 9095 event[pos++] = 2; 9096 event[pos++] = GAP_SUBEVENT_BIG_TERMINATED; 9097 event[pos++] = big->big_handle; 9098 hci_emit_event(event, pos, 0); 9099 } 9100 9101 static void hci_emit_big_sync_created(const le_audio_big_sync_t * big_sync, uint8_t status){ 9102 uint8_t event [6 + (MAX_NR_BIS * 2)]; 9103 uint16_t pos = 0; 9104 event[pos++] = HCI_EVENT_META_GAP; 9105 event[pos++] = 4; 9106 event[pos++] = GAP_SUBEVENT_BIG_SYNC_CREATED; 9107 event[pos++] = status; 9108 event[pos++] = big_sync->big_handle; 9109 event[pos++] = big_sync->num_bis; 9110 uint8_t i; 9111 for (i=0;i<big_sync->num_bis;i++){ 9112 little_endian_store_16(event, pos, big_sync->bis_con_handles[i]); 9113 pos += 2; 9114 } 9115 hci_emit_event(event, pos, 0); 9116 } 9117 9118 static void hci_emit_big_sync_stopped(uint8_t big_handle){ 9119 uint8_t event [4]; 9120 uint16_t pos = 0; 9121 event[pos++] = HCI_EVENT_META_GAP; 9122 event[pos++] = 2; 9123 event[pos++] = GAP_SUBEVENT_BIG_SYNC_STOPPED; 9124 event[pos++] = big_handle; 9125 hci_emit_event(event, pos, 0); 9126 } 9127 9128 static void hci_emit_bis_can_send_now(const le_audio_big_t *big, uint8_t bis_index) { 9129 uint8_t event[6]; 9130 uint16_t pos = 0; 9131 event[pos++] = HCI_EVENT_BIS_CAN_SEND_NOW; 9132 event[pos++] = sizeof(event) - 2; 9133 event[pos++] = big->big_handle; 9134 event[pos++] = bis_index; 9135 little_endian_store_16(event, pos, big->bis_con_handles[bis_index]); 9136 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 9137 } 9138 9139 static le_audio_big_t * hci_big_for_handle(uint8_t big_handle){ 9140 btstack_linked_list_iterator_t it; 9141 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9142 while (btstack_linked_list_iterator_has_next(&it)){ 9143 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9144 if ( big->big_handle == big_handle ) { 9145 return big; 9146 } 9147 } 9148 return NULL; 9149 } 9150 9151 static le_audio_big_sync_t * hci_big_sync_for_handle(uint8_t big_handle){ 9152 btstack_linked_list_iterator_t it; 9153 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_big_syncs); 9154 while (btstack_linked_list_iterator_has_next(&it)){ 9155 le_audio_big_sync_t * big_sync = (le_audio_big_sync_t *) btstack_linked_list_iterator_next(&it); 9156 if ( big_sync->big_handle == big_handle ) { 9157 return big_sync; 9158 } 9159 } 9160 return NULL; 9161 } 9162 9163 void hci_set_num_iso_packets_to_queue(uint8_t num_packets){ 9164 hci_stack->iso_packets_to_queue = num_packets; 9165 } 9166 9167 static void hci_iso_notify_can_send_now(void){ 9168 btstack_linked_list_iterator_t it; 9169 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9170 while (btstack_linked_list_iterator_has_next(&it)){ 9171 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9172 // track number completed packet timestamps 9173 if (big->num_completed_timestamp_current_valid){ 9174 big->num_completed_timestamp_current_valid = false; 9175 if (big->num_completed_timestamp_previous_valid){ 9176 // detect delayed sending of all BIS: tolerate up to 50% delayed event handling 9177 uint32_t iso_interval_missed_threshold_ms = big->params->sdu_interval_us * 3 / 2000; 9178 int32_t num_completed_timestamp_delta_ms = btstack_time_delta(big->num_completed_timestamp_current_ms, 9179 big->num_completed_timestamp_previous_ms); 9180 if (num_completed_timestamp_delta_ms > iso_interval_missed_threshold_ms){ 9181 // to catch up, skip packet on all BIS 9182 uint8_t i; 9183 for (i=0;i<big->num_bis;i++){ 9184 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9185 if (iso_stream){ 9186 iso_stream->num_packets_to_skip++; 9187 } 9188 } 9189 } 9190 } 9191 big->num_completed_timestamp_previous_valid = true; 9192 big->num_completed_timestamp_previous_ms = big->num_completed_timestamp_current_ms; 9193 } 9194 9195 if (big->can_send_now_requested){ 9196 // check if no outgoing iso packets pending and no can send now have to be emitted 9197 uint8_t i; 9198 bool can_send = true; 9199 uint8_t num_iso_queued_minimum = 0; 9200 for (i=0;i<big->num_bis;i++){ 9201 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9202 if (iso_stream == NULL) continue; 9203 // handle case where individual ISO packet was sent too late: 9204 // for each additionally queued packet, a new one needs to get skipped 9205 if (i==0){ 9206 num_iso_queued_minimum = iso_stream->num_packets_sent; 9207 } else if (iso_stream->num_packets_sent > num_iso_queued_minimum){ 9208 uint8_t num_packets_to_skip = iso_stream->num_packets_sent - num_iso_queued_minimum; 9209 iso_stream->num_packets_to_skip += num_packets_to_skip; 9210 iso_stream->num_packets_sent -= num_packets_to_skip; 9211 } 9212 // check if we can send now 9213 if ((iso_stream->num_packets_sent >= hci_stack->iso_packets_to_queue) || (iso_stream->emit_ready_to_send)){ 9214 can_send = false; 9215 break; 9216 } 9217 } 9218 if (can_send){ 9219 // propagate can send now to individual streams 9220 big->can_send_now_requested = false; 9221 for (i=0;i<big->num_bis;i++){ 9222 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9223 iso_stream->emit_ready_to_send = true; 9224 } 9225 } 9226 } 9227 } 9228 9229 if (hci_stack->hci_packet_buffer_reserved) return; 9230 9231 btstack_linked_list_iterator_init(&it, &hci_stack->le_audio_bigs); 9232 while (btstack_linked_list_iterator_has_next(&it)){ 9233 le_audio_big_t * big = (le_audio_big_t *) btstack_linked_list_iterator_next(&it); 9234 // report bis ready 9235 uint8_t i; 9236 for (i=0;i<big->num_bis;i++){ 9237 hci_iso_stream_t * iso_stream = hci_iso_stream_for_con_handle(big->bis_con_handles[i]); 9238 if ((iso_stream != NULL) && iso_stream->emit_ready_to_send){ 9239 iso_stream->emit_ready_to_send = false; 9240 hci_emit_bis_can_send_now(big, i); 9241 break; 9242 } 9243 } 9244 } 9245 } 9246 9247 uint8_t gap_big_create(le_audio_big_t * storage, le_audio_big_params_t * big_params){ 9248 if (hci_big_for_handle(big_params->big_handle) != NULL){ 9249 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9250 } 9251 if (big_params->num_bis == 0){ 9252 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9253 } 9254 if (big_params->num_bis > MAX_NR_BIS){ 9255 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9256 } 9257 9258 // reserve ISO Streams 9259 uint8_t i; 9260 uint8_t status = ERROR_CODE_SUCCESS; 9261 for (i=0;i<big_params->num_bis;i++){ 9262 status = hci_iso_stream_create(HCI_ISO_TYPE_BIS, HCI_CON_HANDLE_INVALID, big_params->big_handle); 9263 if (status != ERROR_CODE_SUCCESS) { 9264 break; 9265 } 9266 } 9267 9268 // free structs on error 9269 if (status != ERROR_CODE_SUCCESS){ 9270 hci_iso_stream_finalize_by_type_and_group_id(HCI_ISO_TYPE_BIS, big_params->big_handle); 9271 return status; 9272 } 9273 9274 le_audio_big_t * big = storage; 9275 big->big_handle = big_params->big_handle; 9276 big->params = big_params; 9277 big->state = LE_AUDIO_BIG_STATE_CREATE; 9278 big->num_bis = big_params->num_bis; 9279 btstack_linked_list_add(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9280 9281 hci_run(); 9282 9283 return ERROR_CODE_SUCCESS; 9284 } 9285 9286 uint8_t gap_big_sync_create(le_audio_big_sync_t * storage, le_audio_big_sync_params_t * big_sync_params){ 9287 if (hci_big_sync_for_handle(big_sync_params->big_handle) != NULL){ 9288 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 9289 } 9290 if (big_sync_params->num_bis == 0){ 9291 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9292 } 9293 if (big_sync_params->num_bis > MAX_NR_BIS){ 9294 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 9295 } 9296 9297 le_audio_big_sync_t * big_sync = storage; 9298 big_sync->big_handle = big_sync_params->big_handle; 9299 big_sync->params = big_sync_params; 9300 big_sync->state = LE_AUDIO_BIG_STATE_CREATE; 9301 big_sync->num_bis = big_sync_params->num_bis; 9302 btstack_linked_list_add(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9303 9304 hci_run(); 9305 9306 return ERROR_CODE_SUCCESS; 9307 } 9308 9309 uint8_t gap_big_terminate(uint8_t big_handle){ 9310 le_audio_big_t * big = hci_big_for_handle(big_handle); 9311 if (big == NULL){ 9312 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9313 } 9314 switch (big->state){ 9315 case LE_AUDIO_BIG_STATE_CREATE: 9316 btstack_linked_list_remove(&hci_stack->le_audio_bigs, (btstack_linked_item_t *) big); 9317 hci_emit_big_terminated(big); 9318 break; 9319 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9320 big->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9321 break; 9322 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9323 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9324 case LE_AUDIO_BIG_STATE_ACTIVE: 9325 big->state = LE_AUDIO_BIG_STATE_TERMINATE; 9326 hci_run(); 9327 break; 9328 default: 9329 return ERROR_CODE_COMMAND_DISALLOWED; 9330 } 9331 return ERROR_CODE_SUCCESS; 9332 } 9333 9334 uint8_t gap_big_sync_terminate(uint8_t big_handle){ 9335 le_audio_big_sync_t * big_sync = hci_big_sync_for_handle(big_handle); 9336 if (big_sync == NULL){ 9337 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9338 } 9339 switch (big_sync->state){ 9340 case LE_AUDIO_BIG_STATE_CREATE: 9341 btstack_linked_list_remove(&hci_stack->le_audio_big_syncs, (btstack_linked_item_t *) big_sync); 9342 hci_emit_big_sync_stopped(big_handle); 9343 break; 9344 case LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH: 9345 big_sync->state = LE_AUDIO_BIG_STATE_W4_SETUP_ISO_PATH_THEN_TERMINATE; 9346 break; 9347 case LE_AUDIO_BIG_STATE_W4_ESTABLISHED: 9348 case LE_AUDIO_BIG_STATE_SETUP_ISO_PATH: 9349 case LE_AUDIO_BIG_STATE_ACTIVE: 9350 big_sync->state = LE_AUDIO_BIG_STATE_TERMINATE; 9351 hci_run(); 9352 break; 9353 default: 9354 return ERROR_CODE_COMMAND_DISALLOWED; 9355 } 9356 return ERROR_CODE_SUCCESS; 9357 } 9358 9359 uint8_t hci_request_bis_can_send_now_events(uint8_t big_handle){ 9360 le_audio_big_t * big = hci_big_for_handle(big_handle); 9361 if (big == NULL){ 9362 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 9363 } 9364 if (big->state != LE_AUDIO_BIG_STATE_ACTIVE){ 9365 return ERROR_CODE_COMMAND_DISALLOWED; 9366 } 9367 big->can_send_now_requested = true; 9368 hci_iso_notify_can_send_now(); 9369 return ERROR_CODE_SUCCESS; 9370 } 9371 #endif 9372 #endif /* ENABLE_BLE */ 9373 9374 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 9375 void hci_setup_test_connections_fuzz(void){ 9376 hci_connection_t * conn; 9377 9378 // default address: 66:55:44:33:00:01 9379 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 9380 9381 // setup Controller info 9382 hci_stack->num_cmd_packets = 255; 9383 hci_stack->acl_packets_total_num = 255; 9384 9385 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 9386 addr[5] = 0x01; 9387 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9388 conn->con_handle = addr[5]; 9389 conn->role = HCI_ROLE_SLAVE; 9390 conn->state = RECEIVED_CONNECTION_REQUEST; 9391 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9392 9393 // setup incoming Classic SCO connection with con handle 0x0002 9394 addr[5] = 0x02; 9395 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9396 conn->con_handle = addr[5]; 9397 conn->role = HCI_ROLE_SLAVE; 9398 conn->state = RECEIVED_CONNECTION_REQUEST; 9399 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9400 9401 // setup ready Classic ACL connection with con handle 0x0003 9402 addr[5] = 0x03; 9403 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 9404 conn->con_handle = addr[5]; 9405 conn->role = HCI_ROLE_SLAVE; 9406 conn->state = OPEN; 9407 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9408 9409 // setup ready Classic SCO connection with con handle 0x0004 9410 addr[5] = 0x04; 9411 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 9412 conn->con_handle = addr[5]; 9413 conn->role = HCI_ROLE_SLAVE; 9414 conn->state = OPEN; 9415 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9416 9417 // setup ready LE ACL connection with con handle 0x005 and public address 9418 addr[5] = 0x05; 9419 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 9420 conn->con_handle = addr[5]; 9421 conn->role = HCI_ROLE_SLAVE; 9422 conn->state = OPEN; 9423 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 9424 conn->sm_connection.sm_connection_encrypted = 1; 9425 } 9426 9427 void hci_free_connections_fuzz(void){ 9428 btstack_linked_list_iterator_t it; 9429 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 9430 while (btstack_linked_list_iterator_has_next(&it)){ 9431 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 9432 btstack_linked_list_iterator_remove(&it); 9433 btstack_memory_hci_connection_free(con); 9434 } 9435 } 9436 void hci_simulate_working_fuzz(void){ 9437 hci_stack->le_scanning_param_update = false; 9438 hci_init_done(); 9439 hci_stack->num_cmd_packets = 255; 9440 } 9441 #endif 9442