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