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 MATTHIAS 24 * RINGWALD 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 HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 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 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 // reset connection state on create and on reconnect 198 // don't overwrite addr, con handle, role 199 static void hci_connection_init(hci_connection_t * conn){ 200 conn->authentication_flags = AUTH_FLAG_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 conn->request_role = HCI_ROLE_INVALID; 205 conn->sniff_subrating_max_latency = 0xffff; 206 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 207 conn->link_key_type = INVALID_LINK_KEY; 208 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 209 btstack_run_loop_set_timer_context(&conn->timeout, conn); 210 hci_connection_timestamp(conn); 211 #endif 212 conn->acl_recombination_length = 0; 213 conn->acl_recombination_pos = 0; 214 conn->num_packets_sent = 0; 215 216 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 217 #ifdef ENABLE_BLE 218 conn->le_phy_update_all_phys = 0xff; 219 #endif 220 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 221 conn->le_max_tx_octets = 27; 222 #endif 223 } 224 225 /** 226 * create connection for given address 227 * 228 * @return connection OR NULL, if no memory left 229 */ 230 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 231 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 232 233 hci_connection_t * conn = btstack_memory_hci_connection_get(); 234 if (!conn) return NULL; 235 hci_connection_init(conn); 236 237 bd_addr_copy(conn->address, addr); 238 conn->address_type = addr_type; 239 conn->con_handle = HCI_CON_HANDLE_INVALID; 240 conn->role = HCI_ROLE_INVALID; 241 242 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 243 244 return conn; 245 } 246 247 248 /** 249 * get le connection parameter range 250 * 251 * @return le connection parameter range struct 252 */ 253 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 254 *range = hci_stack->le_connection_parameter_range; 255 } 256 257 /** 258 * set le connection parameter range 259 * 260 */ 261 262 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 263 hci_stack->le_connection_parameter_range = *range; 264 } 265 266 /** 267 * @brief Test if connection parameters are inside in existing rage 268 * @param conn_interval_min (unit: 1.25ms) 269 * @param conn_interval_max (unit: 1.25ms) 270 * @param conn_latency 271 * @param supervision_timeout (unit: 10ms) 272 * @returns 1 if included 273 */ 274 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){ 275 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 276 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 277 278 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 279 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 280 281 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 282 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 283 284 return 1; 285 } 286 287 /** 288 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 289 * @note: default: 1 290 * @param max_peripheral_connections 291 */ 292 #ifdef ENABLE_LE_PERIPHERAL 293 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 294 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 295 } 296 #endif 297 298 /** 299 * get hci connections iterator 300 * 301 * @return hci connections iterator 302 */ 303 304 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 305 btstack_linked_list_iterator_init(it, &hci_stack->connections); 306 } 307 308 /** 309 * get connection for a given handle 310 * 311 * @return connection OR NULL, if not found 312 */ 313 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 318 if ( item->con_handle == con_handle ) { 319 return item; 320 } 321 } 322 return NULL; 323 } 324 325 /** 326 * get connection for given address 327 * 328 * @return connection OR NULL, if not found 329 */ 330 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 331 btstack_linked_list_iterator_t it; 332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 333 while (btstack_linked_list_iterator_has_next(&it)){ 334 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 335 if (connection->address_type != addr_type) continue; 336 if (memcmp(addr, connection->address, 6) != 0) continue; 337 return connection; 338 } 339 return NULL; 340 } 341 342 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 343 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 344 } 345 346 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 348 } 349 350 #ifdef ENABLE_CLASSIC 351 352 #ifdef ENABLE_SCO_OVER_HCI 353 static int hci_number_sco_connections(void){ 354 int connections = 0; 355 btstack_linked_list_iterator_t it; 356 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 357 while (btstack_linked_list_iterator_has_next(&it)){ 358 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 359 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 360 connections++; 361 } 362 return connections; 363 } 364 #endif 365 366 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 367 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 368 #ifdef HAVE_EMBEDDED_TICK 369 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 370 // connections might be timed out 371 hci_emit_l2cap_check_timeout(connection); 372 } 373 #else 374 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 375 // connections might be timed out 376 hci_emit_l2cap_check_timeout(connection); 377 } 378 #endif 379 } 380 381 static void hci_connection_timestamp(hci_connection_t *connection){ 382 #ifdef HAVE_EMBEDDED_TICK 383 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 384 #else 385 connection->timestamp = btstack_run_loop_get_time_ms(); 386 #endif 387 } 388 389 /** 390 * add authentication flags and reset timer 391 * @note: assumes classic connection 392 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 393 */ 394 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 395 bd_addr_t addr; 396 reverse_bd_addr(bd_addr, addr); 397 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 398 if (conn) { 399 connectionSetAuthenticationFlags(conn, flags); 400 hci_connection_timestamp(conn); 401 } 402 } 403 404 static bool hci_pairing_active(hci_connection_t * hci_connection){ 405 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 406 } 407 408 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 409 if (hci_pairing_active(hci_connection)) return; 410 if (ssp){ 411 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 412 } else { 413 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 414 } 415 // if we are initiator, we have sent an HCI Authenticate Request 416 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 417 418 // if we are responder, use minimal service security level as required level 419 if (!initiator){ 420 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); 421 } 422 423 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 424 425 uint8_t event[12]; 426 event[0] = GAP_EVENT_PAIRING_STARTED; 427 event[1] = 10; 428 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 429 reverse_bd_addr(hci_connection->address, &event[4]); 430 event[10] = (uint8_t) ssp; 431 event[11] = (uint8_t) initiator; 432 hci_emit_event(event, sizeof(event), 1); 433 } 434 435 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 436 hci_connection->requested_security_level = LEVEL_0; 437 if (!hci_pairing_active(hci_connection)) return; 438 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 439 log_info("pairing complete, status %02x", status); 440 441 uint8_t event[12]; 442 event[0] = GAP_EVENT_PAIRING_COMPLETE; 443 event[1] = 9; 444 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 445 reverse_bd_addr(hci_connection->address, &event[4]); 446 event[10] = status; 447 hci_emit_event(event, sizeof(event), 1); 448 } 449 450 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 451 hci_connection_t * conn = hci_connection_for_handle(handle); 452 if (!conn) return false; 453 return hci_pairing_active(conn); 454 } 455 456 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 457 if (!hci_stack->link_key_db) return; 458 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 459 hci_stack->link_key_db->delete_link_key(addr); 460 } 461 462 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 463 if (!hci_stack->link_key_db) return; 464 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 465 hci_stack->link_key_db->put_link_key(addr, link_key, type); 466 } 467 468 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 469 if (!hci_stack->link_key_db) return false; 470 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 471 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 472 return result; 473 } 474 475 void gap_delete_all_link_keys(void){ 476 bd_addr_t addr; 477 link_key_t link_key; 478 link_key_type_t type; 479 btstack_link_key_iterator_t it; 480 int ok = gap_link_key_iterator_init(&it); 481 if (!ok) { 482 log_error("could not initialize iterator"); 483 return; 484 } 485 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 486 gap_drop_link_key_for_bd_addr(addr); 487 } 488 gap_link_key_iterator_done(&it); 489 } 490 491 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 492 if (!hci_stack->link_key_db) return 0; 493 if (!hci_stack->link_key_db->iterator_init) return 0; 494 return hci_stack->link_key_db->iterator_init(it); 495 } 496 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){ 497 if (!hci_stack->link_key_db) return 0; 498 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 499 } 500 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 501 if (!hci_stack->link_key_db) return; 502 hci_stack->link_key_db->iterator_done(it); 503 } 504 #endif 505 506 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 507 switch (address_type){ 508 case BD_ADDR_TYPE_LE_PUBLIC: 509 case BD_ADDR_TYPE_LE_RANDOM: 510 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 511 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 512 return true; 513 default: 514 return false; 515 } 516 } 517 518 static int hci_is_le_connection(hci_connection_t * connection){ 519 return hci_is_le_connection_type(connection->address_type); 520 } 521 522 /** 523 * count connections 524 */ 525 static int nr_hci_connections(void){ 526 int count = 0; 527 btstack_linked_item_t *it; 528 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 529 count++; 530 } 531 return count; 532 } 533 534 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 535 536 unsigned int num_packets_sent_classic = 0; 537 unsigned int num_packets_sent_le = 0; 538 539 btstack_linked_item_t *it; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (hci_is_le_connection(connection)){ 543 num_packets_sent_le += connection->num_packets_sent; 544 } 545 if (connection->address_type == BD_ADDR_TYPE_ACL){ 546 num_packets_sent_classic += connection->num_packets_sent; 547 } 548 } 549 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 550 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 551 int free_slots_le = 0; 552 553 if (free_slots_classic < 0){ 554 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); 555 return 0; 556 } 557 558 if (hci_stack->le_acl_packets_total_num){ 559 // if we have LE slots, they are used 560 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 561 if (free_slots_le < 0){ 562 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); 563 return 0; 564 } 565 } else { 566 // otherwise, classic slots are used for LE, too 567 free_slots_classic -= num_packets_sent_le; 568 if (free_slots_classic < 0){ 569 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); 570 return 0; 571 } 572 } 573 574 switch (address_type){ 575 case BD_ADDR_TYPE_UNKNOWN: 576 log_error("hci_number_free_acl_slots: unknown address type"); 577 return 0; 578 579 case BD_ADDR_TYPE_ACL: 580 return free_slots_classic; 581 582 default: 583 if (hci_stack->le_acl_packets_total_num){ 584 return free_slots_le; 585 } 586 return free_slots_classic; 587 } 588 } 589 590 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 591 // get connection type 592 hci_connection_t * connection = hci_connection_for_handle(con_handle); 593 if (!connection){ 594 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 595 return 0; 596 } 597 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 598 } 599 600 #ifdef ENABLE_CLASSIC 601 static int hci_number_free_sco_slots(void){ 602 unsigned int num_sco_packets_sent = 0; 603 btstack_linked_item_t *it; 604 if (hci_stack->synchronous_flow_control_enabled){ 605 // explicit flow control 606 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 607 hci_connection_t * connection = (hci_connection_t *) it; 608 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 609 num_sco_packets_sent += connection->num_packets_sent; 610 } 611 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 612 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 613 return 0; 614 } 615 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 616 } else { 617 // implicit flow control -- TODO 618 int num_ready = 0; 619 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 620 hci_connection_t * connection = (hci_connection_t *) it; 621 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 622 if (connection->sco_tx_ready == 0) continue; 623 num_ready++; 624 } 625 return num_ready; 626 } 627 } 628 #endif 629 630 // only used to send HCI Host Number Completed Packets 631 static int hci_can_send_comand_packet_transport(void){ 632 if (hci_stack->hci_packet_buffer_reserved) return 0; 633 634 // check for async hci transport implementations 635 if (hci_stack->hci_transport->can_send_packet_now){ 636 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 637 return 0; 638 } 639 } 640 return 1; 641 } 642 643 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 644 bool hci_can_send_command_packet_now(void){ 645 if (hci_can_send_comand_packet_transport() == 0) return false; 646 return hci_stack->num_cmd_packets > 0u; 647 } 648 649 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 650 // check for async hci transport implementations 651 if (!hci_stack->hci_transport->can_send_packet_now) return true; 652 return hci_stack->hci_transport->can_send_packet_now(packet_type); 653 } 654 655 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 657 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 658 } 659 660 bool hci_can_send_acl_le_packet_now(void){ 661 if (hci_stack->hci_packet_buffer_reserved) return false; 662 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 663 } 664 665 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 668 } 669 670 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_now(con_handle); 673 } 674 675 #ifdef ENABLE_CLASSIC 676 bool hci_can_send_acl_classic_packet_now(void){ 677 if (hci_stack->hci_packet_buffer_reserved) return false; 678 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 679 } 680 681 bool hci_can_send_prepared_sco_packet_now(void){ 682 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 683 if (hci_have_usb_transport()){ 684 return hci_stack->sco_can_send_now; 685 } else { 686 return hci_number_free_sco_slots() > 0; 687 } 688 } 689 690 bool hci_can_send_sco_packet_now(void){ 691 if (hci_stack->hci_packet_buffer_reserved) return false; 692 return hci_can_send_prepared_sco_packet_now(); 693 } 694 695 void hci_request_sco_can_send_now_event(void){ 696 hci_stack->sco_waiting_for_can_send_now = 1; 697 hci_notify_if_sco_can_send_now(); 698 } 699 #endif 700 701 // used for internal checks in l2cap.c 702 bool hci_is_packet_buffer_reserved(void){ 703 return hci_stack->hci_packet_buffer_reserved; 704 } 705 706 // reserves outgoing packet buffer. @returns 1 if successful 707 bool hci_reserve_packet_buffer(void){ 708 if (hci_stack->hci_packet_buffer_reserved) { 709 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 710 return false; 711 } 712 hci_stack->hci_packet_buffer_reserved = true; 713 return true; 714 } 715 716 void hci_release_packet_buffer(void){ 717 hci_stack->hci_packet_buffer_reserved = false; 718 } 719 720 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 721 static int hci_transport_synchronous(void){ 722 return hci_stack->hci_transport->can_send_packet_now == NULL; 723 } 724 725 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 726 727 // 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); 728 729 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 730 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 731 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 732 max_acl_data_packet_length = hci_stack->le_data_packets_length; 733 } 734 735 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 736 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 737 max_acl_data_packet_length = connection->le_max_tx_octets; 738 } 739 #endif 740 741 log_debug("hci_send_acl_packet_fragments entered"); 742 743 uint8_t status = ERROR_CODE_SUCCESS; 744 // multiple packets could be send on a synchronous HCI transport 745 while (true){ 746 747 log_debug("hci_send_acl_packet_fragments loop entered"); 748 749 // get current data 750 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 751 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 752 bool more_fragments = false; 753 754 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 755 if (current_acl_data_packet_length > max_acl_data_packet_length){ 756 more_fragments = true; 757 current_acl_data_packet_length = max_acl_data_packet_length; 758 } 759 760 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 761 if (acl_header_pos > 0u){ 762 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 763 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 764 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 765 } 766 767 // update header len 768 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 769 770 // count packet 771 connection->num_packets_sent++; 772 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 773 774 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 775 if (more_fragments){ 776 // update start of next fragment to send 777 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 778 } else { 779 // done 780 hci_stack->acl_fragmentation_pos = 0; 781 hci_stack->acl_fragmentation_total_size = 0; 782 } 783 784 // send packet 785 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 786 const int size = current_acl_data_packet_length + 4; 787 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 788 hci_stack->acl_fragmentation_tx_active = 1; 789 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 790 if (err != 0){ 791 // no error from HCI Transport expected 792 status = ERROR_CODE_HARDWARE_FAILURE; 793 } 794 795 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 796 797 // done yet? 798 if (!more_fragments) break; 799 800 // can send more? 801 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 802 } 803 804 log_debug("hci_send_acl_packet_fragments loop over"); 805 806 // release buffer now for synchronous transport 807 if (hci_transport_synchronous()){ 808 hci_stack->acl_fragmentation_tx_active = 0; 809 hci_release_packet_buffer(); 810 hci_emit_transport_packet_sent(); 811 } 812 813 return status; 814 } 815 816 // pre: caller has reserved the packet buffer 817 uint8_t hci_send_acl_packet_buffer(int size){ 818 btstack_assert(hci_stack->hci_packet_buffer_reserved); 819 820 uint8_t * packet = hci_stack->hci_packet_buffer; 821 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 822 823 // check for free places on Bluetooth module 824 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 825 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return BTSTACK_ACL_BUFFERS_FULL; 829 } 830 831 hci_connection_t *connection = hci_connection_for_handle( con_handle); 832 if (!connection) { 833 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 837 } 838 839 #ifdef ENABLE_CLASSIC 840 hci_connection_timestamp(connection); 841 #endif 842 843 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 844 845 // setup data 846 hci_stack->acl_fragmentation_total_size = size; 847 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 848 849 return hci_send_acl_packet_fragments(connection); 850 } 851 852 #ifdef ENABLE_CLASSIC 853 // pre: caller has reserved the packet buffer 854 uint8_t hci_send_sco_packet_buffer(int size){ 855 btstack_assert(hci_stack->hci_packet_buffer_reserved); 856 857 uint8_t * packet = hci_stack->hci_packet_buffer; 858 859 // skip checks in loopback mode 860 if (!hci_stack->loopback_mode){ 861 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 862 863 // check for free places on Bluetooth module 864 if (!hci_can_send_prepared_sco_packet_now()) { 865 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 866 hci_release_packet_buffer(); 867 hci_emit_transport_packet_sent(); 868 return BTSTACK_ACL_BUFFERS_FULL; 869 } 870 871 // track send packet in connection struct 872 hci_connection_t *connection = hci_connection_for_handle( con_handle); 873 if (!connection) { 874 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 875 hci_release_packet_buffer(); 876 hci_emit_transport_packet_sent(); 877 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 878 } 879 880 if (hci_have_usb_transport()){ 881 // token used 882 hci_stack->sco_can_send_now = false; 883 } else { 884 if (hci_stack->synchronous_flow_control_enabled){ 885 connection->num_packets_sent++; 886 } else { 887 connection->sco_tx_ready--; 888 } 889 } 890 } 891 892 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 893 894 #ifdef HAVE_SCO_TRANSPORT 895 hci_stack->sco_transport->send_packet(packet, size); 896 hci_release_packet_buffer(); 897 hci_emit_transport_packet_sent(); 898 899 return 0; 900 #else 901 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 902 if (hci_transport_synchronous()){ 903 hci_release_packet_buffer(); 904 hci_emit_transport_packet_sent(); 905 } 906 907 if (err != 0){ 908 return ERROR_CODE_HARDWARE_FAILURE; 909 } 910 return ERROR_CODE_SUCCESS; 911 #endif 912 } 913 #endif 914 915 static void acl_handler(uint8_t *packet, uint16_t size){ 916 917 // get info 918 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 919 hci_connection_t *conn = hci_connection_for_handle(con_handle); 920 uint8_t acl_flags = READ_ACL_FLAGS(packet); 921 uint16_t acl_length = READ_ACL_LENGTH(packet); 922 923 // ignore non-registered handle 924 if (!conn){ 925 log_error("acl_handler called with non-registered handle %u!" , con_handle); 926 return; 927 } 928 929 // assert packet is complete 930 if ((acl_length + 4u) != size){ 931 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 932 return; 933 } 934 935 #ifdef ENABLE_CLASSIC 936 // update idle timestamp 937 hci_connection_timestamp(conn); 938 #endif 939 940 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 941 hci_stack->host_completed_packets = 1; 942 conn->num_packets_completed++; 943 #endif 944 945 // handle different packet types 946 switch (acl_flags & 0x03u) { 947 948 case 0x01: // continuation fragment 949 950 // sanity checks 951 if (conn->acl_recombination_pos == 0u) { 952 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 953 return; 954 } 955 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 956 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 957 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 958 conn->acl_recombination_pos = 0; 959 return; 960 } 961 962 // append fragment payload (header already stored) 963 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 964 &packet[4], acl_length); 965 conn->acl_recombination_pos += acl_length; 966 967 // forward complete L2CAP packet if complete. 968 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 969 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 970 // reset recombination buffer 971 conn->acl_recombination_length = 0; 972 conn->acl_recombination_pos = 0; 973 } 974 break; 975 976 case 0x02: { // first fragment 977 978 // sanity check 979 if (conn->acl_recombination_pos) { 980 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 981 conn->acl_recombination_pos = 0; 982 } 983 984 // peek into L2CAP packet! 985 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 986 987 // compare fragment size to L2CAP packet size 988 if (acl_length >= (l2cap_length + 4u)){ 989 // forward fragment as L2CAP packet 990 hci_emit_acl_packet(packet, acl_length + 4u); 991 } else { 992 993 if (acl_length > HCI_ACL_BUFFER_SIZE){ 994 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 995 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 996 return; 997 } 998 999 // store first fragment and tweak acl length for complete package 1000 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1001 packet, acl_length + 4u); 1002 conn->acl_recombination_pos = acl_length + 4u; 1003 conn->acl_recombination_length = l2cap_length; 1004 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1005 } 1006 break; 1007 1008 } 1009 default: 1010 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1011 return; 1012 } 1013 1014 // execute main loop 1015 hci_run(); 1016 } 1017 1018 static void hci_connection_stop_timer(hci_connection_t * conn){ 1019 btstack_run_loop_remove_timer(&conn->timeout); 1020 #ifdef ENABLE_CLASSIC 1021 btstack_run_loop_remove_timer(&conn->timeout_sco); 1022 #endif 1023 } 1024 1025 static void hci_shutdown_connection(hci_connection_t *conn){ 1026 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1027 1028 #ifdef ENABLE_CLASSIC 1029 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1030 bd_addr_type_t addr_type = conn->address_type; 1031 #endif 1032 #ifdef HAVE_SCO_TRANSPORT 1033 hci_con_handle_t con_handle = conn->con_handle; 1034 #endif 1035 #endif 1036 1037 hci_connection_stop_timer(conn); 1038 1039 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1040 btstack_memory_hci_connection_free( conn ); 1041 1042 // now it's gone 1043 hci_emit_nr_connections_changed(); 1044 1045 #ifdef ENABLE_CLASSIC 1046 #ifdef ENABLE_SCO_OVER_HCI 1047 // update SCO 1048 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1049 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1050 } 1051 #endif 1052 #ifdef HAVE_SCO_TRANSPORT 1053 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1054 hci_stack->sco_transport->close(con_handle); 1055 } 1056 #endif 1057 #endif 1058 } 1059 1060 #ifdef ENABLE_CLASSIC 1061 1062 static const uint16_t packet_type_sizes[] = { 1063 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1064 HCI_ACL_DH1_SIZE, 0, 0, 0, 1065 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1066 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1067 }; 1068 static const uint8_t packet_type_feature_requirement_bit[] = { 1069 0, // 3 slot packets 1070 1, // 5 slot packets 1071 25, // EDR 2 mpbs 1072 26, // EDR 3 mbps 1073 39, // 3 slot EDR packts 1074 40, // 5 slot EDR packet 1075 }; 1076 static const uint16_t packet_type_feature_packet_mask[] = { 1077 0x0f00, // 3 slot packets 1078 0xf000, // 5 slot packets 1079 0x1102, // EDR 2 mpbs 1080 0x2204, // EDR 3 mbps 1081 0x0300, // 3 slot EDR packts 1082 0x3000, // 5 slot EDR packet 1083 }; 1084 1085 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1086 // enable packet types based on size 1087 uint16_t packet_types = 0; 1088 unsigned int i; 1089 for (i=0;i<16;i++){ 1090 if (packet_type_sizes[i] == 0) continue; 1091 if (packet_type_sizes[i] <= buffer_size){ 1092 packet_types |= 1 << i; 1093 } 1094 } 1095 // disable packet types due to missing local supported features 1096 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1097 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1098 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1099 if (feature_set) continue; 1100 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1101 packet_types &= ~packet_type_feature_packet_mask[i]; 1102 } 1103 // flip bits for "may not be used" 1104 packet_types ^= 0x3306; 1105 return packet_types; 1106 } 1107 1108 uint16_t hci_usable_acl_packet_types(void){ 1109 return hci_stack->packet_types; 1110 } 1111 #endif 1112 1113 uint8_t* hci_get_outgoing_packet_buffer(void){ 1114 // hci packet buffer is >= acl data packet length 1115 return hci_stack->hci_packet_buffer; 1116 } 1117 1118 uint16_t hci_max_acl_data_packet_length(void){ 1119 return hci_stack->acl_data_packet_length; 1120 } 1121 1122 #ifdef ENABLE_CLASSIC 1123 bool hci_extended_sco_link_supported(void){ 1124 // No. 31, byte 3, bit 7 1125 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1126 } 1127 #endif 1128 1129 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1130 // No. 54, byte 6, bit 6 1131 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1132 } 1133 1134 static int gap_ssp_supported(void){ 1135 // No. 51, byte 6, bit 3 1136 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1137 } 1138 1139 static int hci_classic_supported(void){ 1140 #ifdef ENABLE_CLASSIC 1141 // No. 37, byte 4, bit 5, = No BR/EDR Support 1142 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1143 #else 1144 return 0; 1145 #endif 1146 } 1147 1148 static int hci_le_supported(void){ 1149 #ifdef ENABLE_BLE 1150 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1151 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1152 #else 1153 return 0; 1154 #endif 1155 } 1156 1157 #ifdef ENABLE_BLE 1158 1159 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1160 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1161 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1162 } else { 1163 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1164 } 1165 } 1166 1167 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1168 *addr_type = hci_stack->le_own_addr_type; 1169 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1170 } 1171 1172 #ifdef ENABLE_LE_PERIPHERAL 1173 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1174 *addr_type = hci_stack->le_advertisements_own_addr_type; 1175 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1176 }; 1177 #endif 1178 1179 #ifdef ENABLE_LE_CENTRAL 1180 1181 /** 1182 * @brief Get own addr type and address used for LE connections (Central) 1183 */ 1184 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1185 *addr_type = hci_stack->le_connection_own_addr_type; 1186 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1187 } 1188 1189 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1190 1191 int offset = 3; 1192 int num_reports = packet[offset]; 1193 offset += 1; 1194 1195 int i; 1196 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1197 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1198 for (i=0; (i<num_reports) && (offset < size);i++){ 1199 // sanity checks on data_length: 1200 uint8_t data_length = packet[offset + 8]; 1201 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1202 if ((offset + 9u + data_length + 1u) > size) return; 1203 // setup event 1204 uint8_t event_size = 10u + data_length; 1205 int pos = 0; 1206 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1207 event[pos++] = event_size; 1208 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1209 offset += 8; 1210 pos += 8; 1211 event[pos++] = packet[offset + 1 + data_length]; // rssi 1212 event[pos++] = data_length; 1213 offset++; 1214 (void)memcpy(&event[pos], &packet[offset], data_length); 1215 pos += data_length; 1216 offset += data_length + 1u; // rssi 1217 hci_emit_event(event, pos, 1); 1218 } 1219 } 1220 #endif 1221 #endif 1222 1223 #ifdef ENABLE_BLE 1224 #ifdef ENABLE_LE_PERIPHERAL 1225 static void hci_update_advertisements_enabled_for_current_roles(void){ 1226 if (hci_stack->le_advertisements_enabled){ 1227 // get number of active le slave connections 1228 int num_slave_connections = 0; 1229 btstack_linked_list_iterator_t it; 1230 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1231 while (btstack_linked_list_iterator_has_next(&it)){ 1232 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1233 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1234 if (con->state != OPEN) continue; 1235 if (con->role != HCI_ROLE_SLAVE) continue; 1236 if (!hci_is_le_connection(con)) continue; 1237 num_slave_connections++; 1238 } 1239 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1240 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1241 } else { 1242 hci_stack->le_advertisements_enabled_for_current_roles = false; 1243 } 1244 } 1245 #endif 1246 #endif 1247 1248 #ifdef ENABLE_CLASSIC 1249 static void gap_run_set_local_name(void){ 1250 hci_reserve_packet_buffer(); 1251 uint8_t * packet = hci_stack->hci_packet_buffer; 1252 // construct HCI Command and send 1253 uint16_t opcode = hci_write_local_name.opcode; 1254 hci_stack->last_cmd_opcode = opcode; 1255 packet[0] = opcode & 0xff; 1256 packet[1] = opcode >> 8; 1257 packet[2] = DEVICE_NAME_LEN; 1258 memset(&packet[3], 0, DEVICE_NAME_LEN); 1259 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1260 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1261 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1262 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1263 // expand '00:00:00:00:00:00' in name with bd_addr 1264 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1265 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1266 } 1267 1268 static void gap_run_set_eir_data(void){ 1269 hci_reserve_packet_buffer(); 1270 uint8_t * packet = hci_stack->hci_packet_buffer; 1271 // construct HCI Command in-place and send 1272 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1273 hci_stack->last_cmd_opcode = opcode; 1274 uint16_t offset = 0; 1275 packet[offset++] = opcode & 0xff; 1276 packet[offset++] = opcode >> 8; 1277 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1278 packet[offset++] = 0; // FEC not required 1279 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1280 if (hci_stack->eir_data){ 1281 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1282 ad_context_t context; 1283 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1284 uint8_t data_type = ad_iterator_get_data_type(&context); 1285 uint8_t size = ad_iterator_get_data_len(&context); 1286 const uint8_t *data = ad_iterator_get_data(&context); 1287 // copy item 1288 packet[offset++] = size + 1; 1289 packet[offset++] = data_type; 1290 memcpy(&packet[offset], data, size); 1291 // update name item 1292 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1293 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1294 } 1295 offset += size; 1296 } 1297 } else { 1298 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1299 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1300 packet[offset++] = bytes_to_copy + 1; 1301 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1302 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1303 // expand '00:00:00:00:00:00' in name with bd_addr 1304 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1305 } 1306 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1307 } 1308 #endif 1309 1310 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1311 1312 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1313 if (!hci_stack->config) return 0; 1314 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1315 // Limit baud rate for Broadcom chipsets to 3 mbps 1316 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1317 baud_rate = 3000000; 1318 } 1319 return baud_rate; 1320 } 1321 1322 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1323 UNUSED(ds); 1324 1325 switch (hci_stack->substate){ 1326 case HCI_INIT_W4_SEND_RESET: 1327 log_info("Resend HCI Reset"); 1328 hci_stack->substate = HCI_INIT_SEND_RESET; 1329 hci_stack->num_cmd_packets = 1; 1330 hci_run(); 1331 break; 1332 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1333 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1334 if (hci_stack->hci_transport->reset_link){ 1335 hci_stack->hci_transport->reset_link(); 1336 } 1337 1338 /* fall through */ 1339 1340 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1341 log_info("Resend HCI Reset - CSR Warm Boot"); 1342 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1343 hci_stack->num_cmd_packets = 1; 1344 hci_run(); 1345 break; 1346 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1347 if (hci_stack->hci_transport->set_baudrate){ 1348 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1349 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1350 hci_stack->hci_transport->set_baudrate(baud_rate); 1351 } 1352 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1353 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1354 if (hci_stack->hci_transport->reset_link){ 1355 log_info("Link Reset"); 1356 hci_stack->hci_transport->reset_link(); 1357 } 1358 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1359 hci_run(); 1360 } 1361 break; 1362 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1363 // otherwise continue 1364 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1365 hci_send_cmd(&hci_read_local_supported_commands); 1366 break; 1367 default: 1368 break; 1369 } 1370 } 1371 #endif 1372 1373 static void hci_initializing_next_state(void){ 1374 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1375 } 1376 1377 // assumption: hci_can_send_command_packet_now() == true 1378 static void hci_initializing_run(void){ 1379 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1380 switch (hci_stack->substate){ 1381 case HCI_INIT_SEND_RESET: 1382 hci_state_reset(); 1383 1384 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1385 // prepare reset if command complete not received in 100ms 1386 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1387 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1388 btstack_run_loop_add_timer(&hci_stack->timeout); 1389 #endif 1390 // send command 1391 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1392 hci_send_cmd(&hci_reset); 1393 break; 1394 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1395 hci_send_cmd(&hci_read_local_version_information); 1396 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1397 break; 1398 case HCI_INIT_SEND_READ_LOCAL_NAME: 1399 hci_send_cmd(&hci_read_local_name); 1400 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1401 break; 1402 1403 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1404 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1405 hci_state_reset(); 1406 // prepare reset if command complete not received in 100ms 1407 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1408 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1409 btstack_run_loop_add_timer(&hci_stack->timeout); 1410 // send command 1411 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1412 hci_send_cmd(&hci_reset); 1413 break; 1414 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1415 hci_state_reset(); 1416 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1417 hci_send_cmd(&hci_reset); 1418 break; 1419 case HCI_INIT_SEND_BAUD_CHANGE: { 1420 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1421 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1422 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1423 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1424 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1425 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1426 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1427 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1428 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1429 btstack_run_loop_add_timer(&hci_stack->timeout); 1430 } 1431 break; 1432 } 1433 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1434 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1435 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1436 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1437 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1438 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1439 break; 1440 } 1441 case HCI_INIT_CUSTOM_INIT: 1442 // Custom initialization 1443 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1444 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1445 bool send_cmd = false; 1446 switch (hci_stack->chipset_result){ 1447 case BTSTACK_CHIPSET_VALID_COMMAND: 1448 send_cmd = true; 1449 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1450 break; 1451 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1452 send_cmd = true; 1453 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1454 log_info("CSR Warm Boot"); 1455 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1456 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1457 btstack_run_loop_add_timer(&hci_stack->timeout); 1458 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1459 && hci_stack->config 1460 && hci_stack->chipset 1461 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1462 && hci_stack->hci_transport->set_baudrate 1463 && hci_transport_uart_get_main_baud_rate()){ 1464 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1465 } else { 1466 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1467 } 1468 break; 1469 default: 1470 break; 1471 } 1472 1473 if (send_cmd){ 1474 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1475 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1476 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1477 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1478 break; 1479 } 1480 log_info("Init script done"); 1481 1482 // Init script download on Broadcom chipsets causes: 1483 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1484 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1485 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1486 1487 // - baud rate to reset, restore UART baud rate if needed 1488 int need_baud_change = hci_stack->config 1489 && hci_stack->chipset 1490 && hci_stack->chipset->set_baudrate_command 1491 && hci_stack->hci_transport->set_baudrate 1492 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1493 if (need_baud_change) { 1494 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1495 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1496 hci_stack->hci_transport->set_baudrate(baud_rate); 1497 } 1498 1499 uint16_t bcm_delay_ms = 300; 1500 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1501 // -> Work around: wait here. 1502 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1503 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1504 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1505 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1506 btstack_run_loop_add_timer(&hci_stack->timeout); 1507 break; 1508 } 1509 } 1510 // otherwise continue 1511 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1512 hci_send_cmd(&hci_read_local_supported_commands); 1513 break; 1514 case HCI_INIT_SET_BD_ADDR: 1515 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1516 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1517 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1518 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1519 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1520 break; 1521 #endif 1522 1523 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1524 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1525 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1526 hci_send_cmd(&hci_read_local_supported_commands); 1527 break; 1528 case HCI_INIT_READ_BD_ADDR: 1529 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1530 hci_send_cmd(&hci_read_bd_addr); 1531 break; 1532 case HCI_INIT_READ_BUFFER_SIZE: 1533 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1534 hci_send_cmd(&hci_read_buffer_size); 1535 break; 1536 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1537 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1538 hci_send_cmd(&hci_read_local_supported_features); 1539 break; 1540 1541 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1542 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1543 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1544 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1545 break; 1546 case HCI_INIT_HOST_BUFFER_SIZE: 1547 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1548 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1549 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1550 break; 1551 #endif 1552 1553 case HCI_INIT_SET_EVENT_MASK: 1554 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1555 if (hci_le_supported()){ 1556 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1557 } else { 1558 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1559 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1560 } 1561 break; 1562 1563 #ifdef ENABLE_CLASSIC 1564 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1565 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1566 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1567 break; 1568 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1569 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1570 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1571 break; 1572 case HCI_INIT_WRITE_INQUIRY_MODE: 1573 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1574 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1575 break; 1576 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1577 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1578 hci_stack->secure_connections_active = true; 1579 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1580 break; 1581 case HCI_INIT_WRITE_SCAN_ENABLE: 1582 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1583 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1584 break; 1585 // only sent if ENABLE_SCO_OVER_HCI is defined 1586 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1587 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1588 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1589 break; 1590 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1591 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1592 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1593 break; 1594 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1595 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1596 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1597 #ifdef ENABLE_SCO_OVER_HCI 1598 log_info("BCM: Route SCO data via HCI transport"); 1599 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1600 #endif 1601 #ifdef ENABLE_SCO_OVER_PCM 1602 log_info("BCM: Route SCO data via PCM interface"); 1603 #ifdef ENABLE_BCM_PCM_WBS 1604 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1605 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1606 #else 1607 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1608 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1609 #endif 1610 #endif 1611 break; 1612 #ifdef ENABLE_SCO_OVER_PCM 1613 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1614 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1615 log_info("BCM: Config PCM interface for I2S"); 1616 #ifdef ENABLE_BCM_PCM_WBS 1617 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1618 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1619 #else 1620 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1621 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1622 #endif 1623 break; 1624 #endif 1625 #endif 1626 1627 #ifdef ENABLE_BLE 1628 // LE INIT 1629 case HCI_INIT_LE_READ_BUFFER_SIZE: 1630 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1631 hci_send_cmd(&hci_le_read_buffer_size); 1632 break; 1633 case HCI_INIT_LE_SET_EVENT_MASK: 1634 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1635 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1636 break; 1637 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1638 // LE Supported Host = 1, Simultaneous Host = 0 1639 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1640 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1641 break; 1642 #endif 1643 1644 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1645 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1646 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1647 hci_send_cmd(&hci_le_read_maximum_data_length); 1648 break; 1649 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1650 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1651 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1652 break; 1653 #endif 1654 1655 #ifdef ENABLE_LE_CENTRAL 1656 case HCI_INIT_READ_WHITE_LIST_SIZE: 1657 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1658 hci_send_cmd(&hci_le_read_white_list_size); 1659 break; 1660 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1661 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1662 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1663 break; 1664 #endif 1665 default: 1666 return; 1667 } 1668 } 1669 1670 static void hci_init_done(void){ 1671 // done. tell the app 1672 log_info("hci_init_done -> HCI_STATE_WORKING"); 1673 hci_stack->state = HCI_STATE_WORKING; 1674 hci_emit_state(); 1675 hci_run(); 1676 } 1677 1678 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1679 bool command_completed = false; 1680 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1681 uint16_t opcode = little_endian_read_16(packet,3); 1682 if (opcode == hci_stack->last_cmd_opcode){ 1683 command_completed = true; 1684 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1685 } else { 1686 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1687 } 1688 } 1689 1690 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1691 uint8_t status = packet[2]; 1692 uint16_t opcode = little_endian_read_16(packet,4); 1693 if (opcode == hci_stack->last_cmd_opcode){ 1694 if (status){ 1695 command_completed = true; 1696 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1697 } else { 1698 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1699 } 1700 } else { 1701 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1702 } 1703 } 1704 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1705 // Vendor == CSR 1706 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1707 // TODO: track actual command 1708 command_completed = true; 1709 } 1710 1711 // Vendor == Toshiba 1712 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1713 // TODO: track actual command 1714 command_completed = true; 1715 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1716 hci_stack->num_cmd_packets = 1; 1717 } 1718 #endif 1719 1720 return command_completed; 1721 } 1722 1723 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1724 1725 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1726 1727 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1728 1729 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1730 1731 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1732 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1733 // 1734 // HCI Reset 1735 // Timeout 100 ms 1736 // HCI Reset 1737 // Command Complete Reset 1738 // HCI Read Local Version Information 1739 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1740 // hang... 1741 // 1742 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1743 if (!command_completed 1744 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1745 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1746 1747 uint16_t opcode = little_endian_read_16(packet,3); 1748 if (opcode == hci_reset.opcode){ 1749 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1750 return; 1751 } 1752 } 1753 1754 // CSR & H5 1755 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1756 if (!command_completed 1757 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1758 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1759 1760 uint16_t opcode = little_endian_read_16(packet,3); 1761 if (opcode == hci_reset.opcode){ 1762 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1763 return; 1764 } 1765 } 1766 1767 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1768 // fix: Correct substate and behave as command below 1769 if (command_completed){ 1770 switch (hci_stack->substate){ 1771 case HCI_INIT_SEND_RESET: 1772 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1773 break; 1774 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1775 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1776 break; 1777 default: 1778 break; 1779 } 1780 } 1781 1782 #endif 1783 1784 if (!command_completed) return; 1785 1786 bool need_baud_change = false; 1787 bool need_addr_change = false; 1788 1789 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1790 need_baud_change = hci_stack->config 1791 && hci_stack->chipset 1792 && hci_stack->chipset->set_baudrate_command 1793 && hci_stack->hci_transport->set_baudrate 1794 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1795 1796 need_addr_change = hci_stack->custom_bd_addr_set 1797 && hci_stack->chipset 1798 && hci_stack->chipset->set_bd_addr_command; 1799 #endif 1800 1801 switch(hci_stack->substate){ 1802 1803 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1804 case HCI_INIT_SEND_RESET: 1805 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1806 // fix: just correct substate and behave as command below 1807 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1808 btstack_run_loop_remove_timer(&hci_stack->timeout); 1809 break; 1810 case HCI_INIT_W4_SEND_RESET: 1811 btstack_run_loop_remove_timer(&hci_stack->timeout); 1812 break; 1813 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1814 log_info("Received local name, need baud change %d", (int) need_baud_change); 1815 if (need_baud_change){ 1816 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1817 return; 1818 } 1819 // skip baud change 1820 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1821 return; 1822 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1823 // for STLC2500D, baud rate change already happened. 1824 // for others, baud rate gets changed now 1825 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1826 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1827 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1828 hci_stack->hci_transport->set_baudrate(baud_rate); 1829 } 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1833 btstack_run_loop_remove_timer(&hci_stack->timeout); 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 case HCI_INIT_W4_CUSTOM_INIT: 1837 // repeat custom init 1838 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1839 return; 1840 #else 1841 case HCI_INIT_W4_SEND_RESET: 1842 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1843 return ; 1844 #endif 1845 1846 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1847 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1848 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1849 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1850 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1851 return; 1852 } 1853 if (need_addr_change){ 1854 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1855 return; 1856 } 1857 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1858 return; 1859 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1860 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1861 if (need_baud_change){ 1862 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1863 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1864 hci_stack->hci_transport->set_baudrate(baud_rate); 1865 } 1866 if (need_addr_change){ 1867 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1868 return; 1869 } 1870 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1871 return; 1872 case HCI_INIT_W4_SET_BD_ADDR: 1873 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1874 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1875 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1876 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1877 return; 1878 } 1879 // skipping st warm boot 1880 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1881 return; 1882 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1883 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1884 return; 1885 #endif 1886 case HCI_INIT_W4_READ_BD_ADDR: 1887 // only read buffer size if supported 1888 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1889 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1890 return; 1891 } 1892 // skipping read buffer size 1893 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1894 return; 1895 case HCI_INIT_W4_SET_EVENT_MASK: 1896 // skip Classic init commands for LE only chipsets 1897 if (!hci_classic_supported()){ 1898 #ifdef ENABLE_BLE 1899 if (hci_le_supported()){ 1900 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1901 return; 1902 } 1903 #endif 1904 log_error("Neither BR/EDR nor LE supported"); 1905 hci_init_done(); 1906 return; 1907 } 1908 if (!gap_ssp_supported()){ 1909 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1910 return; 1911 } 1912 break; 1913 #ifdef ENABLE_BLE 1914 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1915 // skip write le host if not supported (e.g. on LE only EM9301) 1916 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1917 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1918 return; 1919 1920 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1921 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1922 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1923 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1924 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1925 return; 1926 } 1927 // explicit fall through to reduce repetitions 1928 1929 #ifdef ENABLE_LE_CENTRAL 1930 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1931 #else 1932 hci_init_done(); 1933 #endif 1934 return; 1935 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1936 1937 #endif /* ENABLE_BLE */ 1938 1939 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1940 // skip write secure connections host support if not supported or disabled 1941 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1942 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1943 return; 1944 } 1945 break; 1946 1947 #ifdef ENABLE_SCO_OVER_HCI 1948 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1949 // skip write synchronous flow control if not supported 1950 if (hci_stack->local_supported_commands[0] & 0x04) break; 1951 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1952 1953 /* fall through */ 1954 1955 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1956 // skip write default erroneous data reporting if not supported 1957 if (hci_stack->local_supported_commands[0] & 0x08) break; 1958 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1959 1960 /* fall through */ 1961 1962 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1963 // skip bcm set sco pcm config on non-Broadcom chipsets 1964 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1965 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1966 1967 /* fall through */ 1968 1969 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1970 if (!hci_le_supported()){ 1971 // SKIP LE init for Classic only configuration 1972 hci_init_done(); 1973 return; 1974 } 1975 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1976 break; 1977 1978 #else /* !ENABLE_SCO_OVER_HCI */ 1979 1980 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1981 #ifdef ENABLE_SCO_OVER_PCM 1982 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1983 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1984 return; 1985 } 1986 #endif 1987 /* fall through */ 1988 1989 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1990 #ifdef ENABLE_BLE 1991 if (hci_le_supported()){ 1992 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1993 return; 1994 } 1995 #endif 1996 // SKIP LE init for Classic only configuration 1997 hci_init_done(); 1998 return; 1999 #endif /* ENABLE_SCO_OVER_HCI */ 2000 2001 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2002 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2003 // Response to command before init done state -> init done 2004 case (HCI_INIT_DONE-1): 2005 hci_init_done(); 2006 return; 2007 #endif 2008 2009 default: 2010 break; 2011 } 2012 hci_initializing_next_state(); 2013 } 2014 2015 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2016 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2017 bd_addr_t bd_address; 2018 (void)memcpy(&bd_address, conn->address, 6); 2019 2020 #ifdef ENABLE_CLASSIC 2021 // cache needed data 2022 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2023 #endif 2024 2025 // connection failed, remove entry 2026 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2027 btstack_memory_hci_connection_free( conn ); 2028 2029 #ifdef ENABLE_CLASSIC 2030 // notify client if dedicated bonding 2031 if (notify_dedicated_bonding_failed){ 2032 log_info("hci notify_dedicated_bonding_failed"); 2033 hci_emit_dedicated_bonding_result(bd_address, status); 2034 } 2035 2036 // if authentication error, also delete link key 2037 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2038 gap_drop_link_key_for_bd_addr(bd_address); 2039 } 2040 #else 2041 UNUSED(status); 2042 #endif 2043 } 2044 2045 #ifdef ENABLE_CLASSIC 2046 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2047 // SSP Controller 2048 if (features[6] & (1 << 3)){ 2049 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2050 } 2051 // eSCO 2052 if (features[3] & (1<<7)){ 2053 conn->remote_supported_features[0] |= 1; 2054 } 2055 // Extended features 2056 if (features[7] & (1<<7)){ 2057 conn->remote_supported_features[0] |= 2; 2058 } 2059 } 2060 2061 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2062 // SSP Host 2063 if (features[0] & (1 << 0)){ 2064 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2065 } 2066 // SC Host 2067 if (features[0] & (1 << 3)){ 2068 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2069 } 2070 } 2071 2072 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2073 // SC Controller 2074 if (features[1] & (1 << 0)){ 2075 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2076 } 2077 } 2078 2079 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2080 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2081 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2082 if (conn->bonding_flags & BONDING_DEDICATED){ 2083 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2084 } 2085 } 2086 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2087 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2088 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2089 } 2090 2091 #endif 2092 2093 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2094 // handle BT initialization 2095 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2096 hci_initializing_event_handler(packet, size); 2097 } 2098 2099 // help with BT sleep 2100 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2101 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2102 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2103 hci_initializing_next_state(); 2104 } 2105 } 2106 2107 #ifdef ENABLE_CLASSIC 2108 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2109 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2110 conn->encryption_key_size = encryption_key_size; 2111 2112 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2113 conn->requested_security_level = LEVEL_0; 2114 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2115 return; 2116 } 2117 2118 // Request Authentication if not already done 2119 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2120 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2121 } 2122 #endif 2123 2124 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2125 UNUSED(size); 2126 2127 uint16_t manufacturer; 2128 #ifdef ENABLE_CLASSIC 2129 hci_con_handle_t handle; 2130 hci_connection_t * conn; 2131 uint8_t status; 2132 #endif 2133 // get num cmd packets - limit to 1 to reduce complexity 2134 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2135 2136 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2137 switch (opcode){ 2138 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2139 if (packet[5]) break; 2140 // terminate, name 248 chars 2141 packet[6+248] = 0; 2142 log_info("local name: %s", &packet[6]); 2143 break; 2144 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2145 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2146 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2147 uint16_t acl_len = little_endian_read_16(packet, 6); 2148 uint16_t sco_len = packet[8]; 2149 2150 // determine usable ACL/SCO payload size 2151 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2152 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2153 2154 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2155 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2156 2157 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2158 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2159 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2160 } 2161 break; 2162 case HCI_OPCODE_HCI_READ_RSSI: 2163 if (packet[5] == ERROR_CODE_SUCCESS){ 2164 uint8_t event[5]; 2165 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2166 event[1] = 3; 2167 (void)memcpy(&event[2], &packet[6], 3); 2168 hci_emit_event(event, sizeof(event), 1); 2169 } 2170 break; 2171 #ifdef ENABLE_BLE 2172 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2173 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2174 hci_stack->le_acl_packets_total_num = packet[8]; 2175 // determine usable ACL payload size 2176 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2177 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2178 } 2179 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2180 break; 2181 #endif 2182 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2183 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2184 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2185 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2186 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); 2187 break; 2188 #endif 2189 #ifdef ENABLE_LE_CENTRAL 2190 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2191 hci_stack->le_whitelist_capacity = packet[6]; 2192 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2193 break; 2194 #endif 2195 case HCI_OPCODE_HCI_READ_BD_ADDR: 2196 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2197 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)); 2198 #ifdef ENABLE_CLASSIC 2199 if (hci_stack->link_key_db){ 2200 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2201 } 2202 #endif 2203 break; 2204 #ifdef ENABLE_CLASSIC 2205 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2206 hci_emit_discoverable_enabled(hci_stack->discoverable); 2207 break; 2208 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2209 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2210 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2211 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2212 hci_emit_event(event, sizeof(event), 1); 2213 } 2214 break; 2215 #endif 2216 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2217 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2218 2219 #ifdef ENABLE_CLASSIC 2220 // determine usable ACL packet types based on host buffer size and supported features 2221 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2222 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2223 #endif 2224 // Classic/LE 2225 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2226 break; 2227 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2228 manufacturer = little_endian_read_16(packet, 10); 2229 // map Cypress to Broadcom 2230 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2231 log_info("Treat Cypress as Broadcom"); 2232 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2233 little_endian_store_16(packet, 10, manufacturer); 2234 } 2235 hci_stack->manufacturer = manufacturer; 2236 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2237 break; 2238 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2239 hci_stack->local_supported_commands[0] = 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2244 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2248 hci_stack->local_supported_commands[1] = 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2250 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2254 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2255 break; 2256 #ifdef ENABLE_CLASSIC 2257 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2258 if (packet[5]) return; 2259 hci_stack->synchronous_flow_control_enabled = 1; 2260 break; 2261 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2262 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2263 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2264 conn = hci_connection_for_handle(handle); 2265 if (conn != NULL) { 2266 uint8_t key_size = 0; 2267 if (status == 0){ 2268 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2269 log_info("Handle %04x key Size: %u", handle, key_size); 2270 } else { 2271 key_size = 1; 2272 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2273 } 2274 hci_handle_read_encryption_key_size_complete(conn, key_size); 2275 } 2276 break; 2277 // assert pairing complete event is emitted. 2278 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2279 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2280 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2281 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2282 // lookup connection by gap pairing addr 2283 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2284 if (conn == NULL) break; 2285 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2286 break; 2287 2288 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2289 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2290 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2291 uint8_t event[67]; 2292 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2293 event[1] = 65; 2294 (void)memset(&event[2], 0, 65); 2295 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2296 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2297 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2298 event[2] = 3; 2299 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2300 } else { 2301 event[2] = 1; 2302 } 2303 } 2304 hci_emit_event(event, sizeof(event), 0); 2305 break; 2306 } 2307 2308 // note: only needed if user does not provide OOB data 2309 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2310 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2311 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2312 if (conn == NULL) break; 2313 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2314 break; 2315 #endif 2316 #endif 2317 default: 2318 break; 2319 } 2320 } 2321 2322 #ifdef ENABLE_BLE 2323 static void event_handle_le_connection_complete(const uint8_t * packet){ 2324 bd_addr_t addr; 2325 bd_addr_type_t addr_type; 2326 hci_connection_t * conn; 2327 2328 // Connection management 2329 reverse_bd_addr(&packet[8], addr); 2330 addr_type = (bd_addr_type_t)packet[7]; 2331 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2332 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2333 2334 #ifdef ENABLE_LE_CENTRAL 2335 // handle error: error is reported only to the initiator -> outgoing connection 2336 if (packet[3]){ 2337 2338 // handle cancelled outgoing connection 2339 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2340 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2341 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2342 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2343 // reset state 2344 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2345 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2346 // get outgoing connection conn struct for direct connect 2347 conn = gap_get_outgoing_connection(); 2348 } 2349 2350 // outgoing le connection establishment is done 2351 if (conn){ 2352 // remove entry 2353 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2354 btstack_memory_hci_connection_free( conn ); 2355 } 2356 return; 2357 } 2358 #endif 2359 2360 // on success, both hosts receive connection complete event 2361 if (packet[6] == HCI_ROLE_MASTER){ 2362 #ifdef ENABLE_LE_CENTRAL 2363 // if we're master on an le connection, it was an outgoing connection and we're done with it 2364 // note: no hci_connection_t object exists yet for connect with whitelist 2365 if (hci_is_le_connection_type(addr_type)){ 2366 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2367 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2368 } 2369 #endif 2370 } else { 2371 #ifdef ENABLE_LE_PERIPHERAL 2372 // if we're slave, it was an incoming connection, advertisements have stopped 2373 hci_stack->le_advertisements_active = false; 2374 #endif 2375 } 2376 2377 // LE connections are auto-accepted, so just create a connection if there isn't one already 2378 if (!conn){ 2379 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2380 } 2381 2382 // no memory, sorry. 2383 if (!conn){ 2384 return; 2385 } 2386 2387 conn->state = OPEN; 2388 conn->role = packet[6]; 2389 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2390 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2391 2392 #ifdef ENABLE_LE_PERIPHERAL 2393 if (packet[6] == HCI_ROLE_SLAVE){ 2394 hci_update_advertisements_enabled_for_current_roles(); 2395 } 2396 #endif 2397 2398 // init unenhanced att bearer mtu 2399 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2400 conn->att_connection.mtu_exchanged = false; 2401 2402 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2403 2404 // restart timer 2405 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2406 // btstack_run_loop_add_timer(&conn->timeout); 2407 2408 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2409 2410 hci_emit_nr_connections_changed(); 2411 } 2412 #endif 2413 2414 #ifdef ENABLE_CLASSIC 2415 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){ 2416 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2417 // LEVEL_4 is tested by l2cap 2418 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2419 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2420 if (level >= LEVEL_3){ 2421 // MITM not possible without keyboard or display 2422 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2423 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2424 2425 // MITM possible if one side has keyboard and the other has keyboard or display 2426 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2427 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2428 2429 // MITM not possible if one side has only display and other side has no keyboard 2430 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2431 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2432 } 2433 // LEVEL 2 requires SSP, which is a given 2434 return true; 2435 } 2436 2437 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2438 uint16_t i; 2439 for (i=0; i < size ; i++){ 2440 if (data[i] != 0) { 2441 return false; 2442 } 2443 } 2444 return true; 2445 } 2446 2447 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2448 // get requested security level 2449 gap_security_level_t requested_security_level = conn->requested_security_level; 2450 if (hci_stack->gap_secure_connections_only_mode){ 2451 requested_security_level = LEVEL_4; 2452 } 2453 2454 // assess security: LEVEL 4 requires SC 2455 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2456 if ((requested_security_level == LEVEL_4) && 2457 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2458 !hci_remote_sc_enabled(conn)){ 2459 log_info("Level 4 required, but SC not supported -> abort"); 2460 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2461 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2462 return; 2463 } 2464 2465 // assess security based on io capabilities 2466 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2467 // responder: fully validate io caps of both sides as well as OOB data 2468 bool security_possible = false; 2469 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2470 2471 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2472 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2473 // so we merge the OOB data availability 2474 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2475 if (conn->classic_oob_c_192 != NULL){ 2476 have_oob_data |= 1; 2477 } 2478 if (conn->classic_oob_c_256 != NULL){ 2479 have_oob_data |= 2; 2480 } 2481 // for up to Level 3, either P-192 as well as P-256 will do 2482 // 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 2483 // if remote does not SC, we should not receive P-256 data either 2484 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2485 security_possible = true; 2486 } 2487 // for Level 4, P-256 is needed 2488 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2489 security_possible = true; 2490 } 2491 #endif 2492 2493 if (security_possible == false){ 2494 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2495 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2496 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2497 return; 2498 } 2499 } else { 2500 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2501 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2502 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2503 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2504 log_info("Level 3+ required, but no input/output -> abort"); 2505 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2506 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2507 return; 2508 } 2509 #endif 2510 #endif 2511 } 2512 2513 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2514 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2515 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2516 } else { 2517 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2518 } 2519 #endif 2520 } 2521 2522 #endif 2523 2524 static void event_handler(uint8_t *packet, uint16_t size){ 2525 2526 uint16_t event_length = packet[1]; 2527 2528 // assert packet is complete 2529 if (size != (event_length + 2u)){ 2530 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2531 return; 2532 } 2533 2534 bd_addr_type_t addr_type; 2535 hci_con_handle_t handle; 2536 hci_connection_t * conn; 2537 int i; 2538 int create_connection_cmd; 2539 2540 #ifdef ENABLE_CLASSIC 2541 hci_link_type_t link_type; 2542 bd_addr_t addr; 2543 #endif 2544 2545 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2546 2547 switch (hci_event_packet_get_type(packet)) { 2548 2549 case HCI_EVENT_COMMAND_COMPLETE: 2550 handle_command_complete_event(packet, size); 2551 break; 2552 2553 case HCI_EVENT_COMMAND_STATUS: 2554 // get num cmd packets - limit to 1 to reduce complexity 2555 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2556 2557 // check command status to detected failed outgoing connections 2558 create_connection_cmd = 0; 2559 #ifdef ENABLE_CLASSIC 2560 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2561 create_connection_cmd = 1; 2562 } 2563 #endif 2564 #ifdef ENABLE_LE_CENTRAL 2565 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2566 create_connection_cmd = 1; 2567 } 2568 #endif 2569 if (create_connection_cmd) { 2570 uint8_t status = hci_event_command_status_get_status(packet); 2571 addr_type = hci_stack->outgoing_addr_type; 2572 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2573 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2574 2575 // reset outgoing address info 2576 memset(hci_stack->outgoing_addr, 0, 6); 2577 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2578 2579 // on error 2580 if (status != ERROR_CODE_SUCCESS){ 2581 #ifdef ENABLE_LE_CENTRAL 2582 if (hci_is_le_connection_type(addr_type)){ 2583 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2584 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2585 } 2586 #endif 2587 // error => outgoing connection failed 2588 if (conn != NULL){ 2589 hci_handle_connection_failed(conn, status); 2590 } 2591 } 2592 } 2593 2594 #ifdef ENABLE_CLASSIC 2595 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2596 uint8_t status = hci_event_command_status_get_status(packet); 2597 log_info("command status (inquiry), status %x", status); 2598 if (status == ERROR_CODE_SUCCESS) { 2599 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2600 } else { 2601 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2602 } 2603 } 2604 #endif 2605 break; 2606 2607 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2608 if (size < 3) return; 2609 uint16_t num_handles = packet[2]; 2610 if (size != (3u + num_handles * 4u)) return; 2611 uint16_t offset = 3; 2612 for (i=0; i<num_handles;i++){ 2613 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2614 offset += 2u; 2615 uint16_t num_packets = little_endian_read_16(packet, offset); 2616 offset += 2u; 2617 2618 conn = hci_connection_for_handle(handle); 2619 if (!conn){ 2620 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2621 continue; 2622 } 2623 2624 if (conn->num_packets_sent >= num_packets){ 2625 conn->num_packets_sent -= num_packets; 2626 } else { 2627 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2628 conn->num_packets_sent = 0; 2629 } 2630 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2631 2632 #ifdef ENABLE_CLASSIC 2633 // For SCO, we do the can_send_now_check here 2634 hci_notify_if_sco_can_send_now(); 2635 #endif 2636 } 2637 break; 2638 } 2639 2640 #ifdef ENABLE_CLASSIC 2641 case HCI_EVENT_INQUIRY_COMPLETE: 2642 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2643 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2644 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2645 hci_emit_event(event, sizeof(event), 1); 2646 } 2647 break; 2648 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2649 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2650 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2651 } 2652 break; 2653 case HCI_EVENT_CONNECTION_REQUEST: 2654 reverse_bd_addr(&packet[2], addr); 2655 link_type = (hci_link_type_t) packet[11]; 2656 2657 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2658 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2659 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2660 bd_addr_copy(hci_stack->decline_addr, addr); 2661 break; 2662 } 2663 2664 if (hci_stack->gap_classic_accept_callback != NULL){ 2665 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2666 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2667 bd_addr_copy(hci_stack->decline_addr, addr); 2668 break; 2669 } 2670 } 2671 2672 // TODO: eval COD 8-10 2673 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2674 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2675 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2676 if (!conn) { 2677 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2678 } 2679 if (!conn) { 2680 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2681 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2682 bd_addr_copy(hci_stack->decline_addr, addr); 2683 break; 2684 } 2685 conn->role = HCI_ROLE_SLAVE; 2686 conn->state = RECEIVED_CONNECTION_REQUEST; 2687 // store info about eSCO 2688 if (link_type == HCI_LINK_TYPE_ESCO){ 2689 conn->remote_supported_features[0] |= 1; 2690 } 2691 hci_run(); 2692 break; 2693 2694 case HCI_EVENT_CONNECTION_COMPLETE: 2695 // Connection management 2696 reverse_bd_addr(&packet[5], addr); 2697 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2698 addr_type = BD_ADDR_TYPE_ACL; 2699 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2700 if (conn) { 2701 if (!packet[2]){ 2702 conn->state = OPEN; 2703 conn->con_handle = little_endian_read_16(packet, 3); 2704 2705 // queue get remote feature 2706 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2707 2708 // queue set supervision timeout if we're master 2709 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2710 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2711 } 2712 2713 // restart timer 2714 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2715 btstack_run_loop_add_timer(&conn->timeout); 2716 2717 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2718 2719 hci_emit_nr_connections_changed(); 2720 } else { 2721 // connection failed 2722 hci_handle_connection_failed(conn, packet[2]); 2723 } 2724 } 2725 break; 2726 2727 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2728 reverse_bd_addr(&packet[5], addr); 2729 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2730 if (packet[2]){ 2731 // connection failed 2732 break; 2733 } 2734 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2735 if (!conn) { 2736 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2737 } 2738 if (!conn) { 2739 break; 2740 } 2741 conn->state = OPEN; 2742 conn->con_handle = little_endian_read_16(packet, 3); 2743 2744 #ifdef ENABLE_SCO_OVER_HCI 2745 // update SCO 2746 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2747 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2748 } 2749 // trigger can send now 2750 if (hci_have_usb_transport()){ 2751 hci_stack->sco_can_send_now = true; 2752 } 2753 #endif 2754 #ifdef HAVE_SCO_TRANSPORT 2755 // configure sco transport 2756 if (hci_stack->sco_transport != NULL){ 2757 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2758 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2759 } 2760 #endif 2761 break; 2762 2763 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2764 handle = little_endian_read_16(packet, 3); 2765 conn = hci_connection_for_handle(handle); 2766 if (!conn) break; 2767 if (!packet[2]){ 2768 const uint8_t * features = &packet[5]; 2769 hci_handle_remote_features_page_0(conn, features); 2770 2771 // read extended features if possible 2772 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2773 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2774 break; 2775 } 2776 } 2777 hci_handle_remote_features_received(conn); 2778 break; 2779 2780 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2781 handle = little_endian_read_16(packet, 3); 2782 conn = hci_connection_for_handle(handle); 2783 if (!conn) break; 2784 // status = ok, page = 1 2785 if (!packet[2]) { 2786 uint8_t page_number = packet[5]; 2787 uint8_t maximum_page_number = packet[6]; 2788 const uint8_t * features = &packet[7]; 2789 bool done = false; 2790 switch (page_number){ 2791 case 1: 2792 hci_handle_remote_features_page_1(conn, features); 2793 if (maximum_page_number >= 2){ 2794 // get Secure Connections (Controller) from Page 2 if available 2795 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2796 } else { 2797 // otherwise, assume SC (Controller) == SC (Host) 2798 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2799 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2800 } 2801 done = true; 2802 } 2803 break; 2804 case 2: 2805 hci_handle_remote_features_page_2(conn, features); 2806 done = true; 2807 break; 2808 default: 2809 break; 2810 } 2811 if (!done) break; 2812 } 2813 hci_handle_remote_features_received(conn); 2814 break; 2815 2816 case HCI_EVENT_LINK_KEY_REQUEST: 2817 // request handled by hci_run() 2818 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2819 break; 2820 2821 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2822 hci_event_link_key_request_get_bd_addr(packet, addr); 2823 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2824 if (!conn) break; 2825 2826 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2827 2828 // CVE-2020-26555: ignore NULL link key 2829 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2830 if (btstack_is_null(&packet[8], 16)) break; 2831 2832 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2833 // Change Connection Encryption keeps link key type 2834 if (link_key_type != CHANGED_COMBINATION_KEY){ 2835 conn->link_key_type = link_key_type; 2836 } 2837 2838 // cache link key. link keys stored in little-endian format for legacy reasons 2839 memcpy(&conn->link_key, &packet[8], 16); 2840 2841 // only store link key: 2842 // - if bondable enabled 2843 if (hci_stack->bondable == false) break; 2844 // - if security level sufficient 2845 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2846 // - for SSP, also check if remote side requested bonding as well 2847 if (conn->link_key_type != COMBINATION_KEY){ 2848 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2849 if (!remote_bonding){ 2850 break; 2851 } 2852 } 2853 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2854 break; 2855 } 2856 2857 case HCI_EVENT_PIN_CODE_REQUEST: 2858 hci_event_pin_code_request_get_bd_addr(packet, addr); 2859 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2860 if (!conn) break; 2861 2862 hci_pairing_started(conn, false); 2863 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2864 if (!hci_stack->bondable ){ 2865 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2866 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2867 hci_run(); 2868 return; 2869 } 2870 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2871 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2872 log_info("Level 4 required, but SC not supported -> abort"); 2873 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2874 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2875 hci_run(); 2876 return; 2877 } 2878 break; 2879 2880 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2881 hci_event_io_capability_response_get_bd_addr(packet, addr); 2882 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2883 if (!conn) break; 2884 2885 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2886 hci_pairing_started(conn, true); 2887 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2888 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2889 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2890 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2891 #endif 2892 break; 2893 2894 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2895 hci_event_io_capability_response_get_bd_addr(packet, addr); 2896 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2897 if (!conn) break; 2898 2899 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2900 hci_connection_timestamp(conn); 2901 hci_pairing_started(conn, true); 2902 break; 2903 2904 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2905 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2906 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2907 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2908 if (!conn) break; 2909 2910 hci_connection_timestamp(conn); 2911 2912 hci_pairing_started(conn, true); 2913 2914 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2915 break; 2916 #endif 2917 2918 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2919 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2920 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2921 if (!conn) break; 2922 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2923 if (hci_stack->ssp_auto_accept){ 2924 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2925 }; 2926 } else { 2927 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2928 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2929 // don't forward event to app 2930 hci_run(); 2931 return; 2932 } 2933 break; 2934 2935 case HCI_EVENT_USER_PASSKEY_REQUEST: 2936 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2937 if (hci_stack->ssp_auto_accept){ 2938 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2939 }; 2940 break; 2941 2942 case HCI_EVENT_MODE_CHANGE: 2943 handle = hci_event_mode_change_get_handle(packet); 2944 conn = hci_connection_for_handle(handle); 2945 if (!conn) break; 2946 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2947 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2948 break; 2949 #endif 2950 2951 case HCI_EVENT_ENCRYPTION_CHANGE: 2952 handle = hci_event_encryption_change_get_connection_handle(packet); 2953 conn = hci_connection_for_handle(handle); 2954 if (!conn) break; 2955 if (hci_event_encryption_change_get_status(packet) == 0u) { 2956 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2957 if (encryption_enabled){ 2958 if (hci_is_le_connection(conn)){ 2959 // For LE, we accept connection as encrypted 2960 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2961 } 2962 #ifdef ENABLE_CLASSIC 2963 else { 2964 2965 // dedicated bonding: send result and disconnect 2966 if (conn->bonding_flags & BONDING_DEDICATED){ 2967 conn->bonding_flags &= ~BONDING_DEDICATED; 2968 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2969 conn->bonding_status = packet[2]; 2970 break; 2971 } 2972 2973 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2974 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2975 bool connected_uses_aes_ccm = encryption_enabled == 2; 2976 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2977 log_info("SC during pairing, but only E0 now -> abort"); 2978 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2979 break; 2980 } 2981 2982 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2983 if (connected_uses_aes_ccm){ 2984 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2985 } 2986 2987 #ifdef ENABLE_TESTING_SUPPORT 2988 // work around for issue with PTS dongle 2989 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2990 #endif 2991 2992 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2993 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2994 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2995 } else { 2996 // if not, pretend everything is perfect 2997 hci_handle_read_encryption_key_size_complete(conn, 16); 2998 } 2999 } 3000 #endif 3001 } else { 3002 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3003 } 3004 } 3005 3006 break; 3007 3008 #ifdef ENABLE_CLASSIC 3009 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3010 handle = hci_event_authentication_complete_get_connection_handle(packet); 3011 conn = hci_connection_for_handle(handle); 3012 if (!conn) break; 3013 3014 // clear authentication active flag 3015 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3016 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3017 3018 // authenticated only if auth status == 0 3019 if (hci_event_authentication_complete_get_status(packet) == 0){ 3020 // authenticated 3021 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3022 3023 // If not already encrypted, start encryption 3024 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3025 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3026 break; 3027 } 3028 } 3029 3030 // emit updated security level 3031 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3032 break; 3033 3034 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3035 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3036 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3037 if (!conn) break; 3038 3039 // treat successfully paired connection as authenticated 3040 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3041 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3042 } 3043 3044 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3045 break; 3046 #endif 3047 3048 // HCI_EVENT_DISCONNECTION_COMPLETE 3049 // has been split, to first notify stack before shutting connection down 3050 // see end of function, too. 3051 case HCI_EVENT_DISCONNECTION_COMPLETE: 3052 if (packet[2]) break; // status != 0 3053 handle = little_endian_read_16(packet, 3); 3054 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3055 if (hci_stack->acl_fragmentation_total_size > 0u) { 3056 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3057 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3058 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3059 hci_stack->acl_fragmentation_total_size = 0; 3060 hci_stack->acl_fragmentation_pos = 0; 3061 if (release_buffer){ 3062 hci_release_packet_buffer(); 3063 } 3064 } 3065 } 3066 3067 conn = hci_connection_for_handle(handle); 3068 if (!conn) break; 3069 #ifdef ENABLE_CLASSIC 3070 // pairing failed if it was ongoing 3071 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3072 #endif 3073 // mark connection for shutdown, stop timers 3074 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3075 hci_connection_stop_timer(conn); 3076 3077 // emit dedicatd bonding event 3078 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3079 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3080 } 3081 3082 #ifdef ENABLE_BLE 3083 #ifdef ENABLE_LE_PERIPHERAL 3084 // re-enable advertisements for le connections if active 3085 if (hci_is_le_connection(conn)){ 3086 hci_update_advertisements_enabled_for_current_roles(); 3087 } 3088 #endif 3089 #endif 3090 break; 3091 3092 case HCI_EVENT_HARDWARE_ERROR: 3093 log_error("Hardware Error: 0x%02x", packet[2]); 3094 if (hci_stack->hardware_error_callback){ 3095 (*hci_stack->hardware_error_callback)(packet[2]); 3096 } else { 3097 // if no special requests, just reboot stack 3098 hci_power_control_off(); 3099 hci_power_control_on(); 3100 } 3101 break; 3102 3103 #ifdef ENABLE_CLASSIC 3104 case HCI_EVENT_ROLE_CHANGE: 3105 if (packet[2]) break; // status != 0 3106 reverse_bd_addr(&packet[3], addr); 3107 addr_type = BD_ADDR_TYPE_ACL; 3108 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3109 if (!conn) break; 3110 conn->role = packet[9]; 3111 break; 3112 #endif 3113 3114 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3115 // release packet buffer only for asynchronous transport and if there are not further fragements 3116 if (hci_transport_synchronous()) { 3117 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3118 return; // instead of break: to avoid re-entering hci_run() 3119 } 3120 hci_stack->acl_fragmentation_tx_active = 0; 3121 if (hci_stack->acl_fragmentation_total_size) break; 3122 hci_release_packet_buffer(); 3123 3124 // L2CAP receives this event via the hci_emit_event below 3125 3126 #ifdef ENABLE_CLASSIC 3127 // For SCO, we do the can_send_now_check here 3128 hci_notify_if_sco_can_send_now(); 3129 #endif 3130 break; 3131 3132 #ifdef ENABLE_CLASSIC 3133 case HCI_EVENT_SCO_CAN_SEND_NOW: 3134 // For SCO, we do the can_send_now_check here 3135 hci_stack->sco_can_send_now = true; 3136 hci_notify_if_sco_can_send_now(); 3137 return; 3138 3139 // explode inquriy results for easier consumption 3140 case HCI_EVENT_INQUIRY_RESULT: 3141 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3142 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3143 gap_inquiry_explode(packet, size); 3144 break; 3145 #endif 3146 3147 #ifdef ENABLE_BLE 3148 case HCI_EVENT_LE_META: 3149 switch (packet[2]){ 3150 #ifdef ENABLE_LE_CENTRAL 3151 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3152 // log_info("advertising report received"); 3153 if (!hci_stack->le_scanning_enabled) break; 3154 le_handle_advertisement_report(packet, size); 3155 break; 3156 #endif 3157 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3158 event_handle_le_connection_complete(packet); 3159 break; 3160 3161 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3162 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3163 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3164 conn = hci_connection_for_handle(handle); 3165 if (!conn) break; 3166 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3167 break; 3168 3169 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3170 // connection 3171 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3172 conn = hci_connection_for_handle(handle); 3173 if (conn) { 3174 // read arguments 3175 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3176 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3177 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3178 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3179 3180 // validate against current connection parameter range 3181 le_connection_parameter_range_t existing_range; 3182 gap_get_connection_parameter_range(&existing_range); 3183 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3184 if (update_parameter){ 3185 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3186 conn->le_conn_interval_min = le_conn_interval_min; 3187 conn->le_conn_interval_max = le_conn_interval_max; 3188 conn->le_conn_latency = le_conn_latency; 3189 conn->le_supervision_timeout = le_supervision_timeout; 3190 } else { 3191 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3192 } 3193 } 3194 break; 3195 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3196 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3197 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3198 conn = hci_connection_for_handle(handle); 3199 if (conn) { 3200 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3201 } 3202 break; 3203 #endif 3204 default: 3205 break; 3206 } 3207 break; 3208 #endif 3209 case HCI_EVENT_VENDOR_SPECIFIC: 3210 // Vendor specific commands often create vendor specific event instead of num completed packets 3211 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3212 switch (hci_stack->manufacturer){ 3213 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3214 hci_stack->num_cmd_packets = 1; 3215 break; 3216 default: 3217 break; 3218 } 3219 break; 3220 default: 3221 break; 3222 } 3223 3224 handle_event_for_current_stack_state(packet, size); 3225 3226 // notify upper stack 3227 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3228 3229 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3230 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3231 handle = little_endian_read_16(packet, 3); 3232 hci_connection_t * aConn = hci_connection_for_handle(handle); 3233 // discard connection if app did not trigger a reconnect in the event handler 3234 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3235 hci_shutdown_connection(aConn); 3236 } 3237 } 3238 3239 // execute main loop 3240 hci_run(); 3241 } 3242 3243 #ifdef ENABLE_CLASSIC 3244 3245 #ifdef ENABLE_SCO_OVER_HCI 3246 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3247 static void sco_schedule_tx(hci_connection_t * conn); 3248 3249 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3250 log_debug("SCO TX Timeout"); 3251 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3252 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3253 if (!conn) return; 3254 3255 // trigger send 3256 conn->sco_tx_ready = 1; 3257 // extra packet if CVSD but SCO buffer is too short 3258 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3259 conn->sco_tx_ready++; 3260 } 3261 hci_notify_if_sco_can_send_now(); 3262 } 3263 3264 3265 #define SCO_TX_AFTER_RX_MS (6) 3266 3267 static void sco_schedule_tx(hci_connection_t * conn){ 3268 3269 uint32_t now = btstack_run_loop_get_time_ms(); 3270 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3271 int time_delta_ms = sco_tx_ms - now; 3272 3273 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3274 3275 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3276 btstack_run_loop_remove_timer(timer); 3277 btstack_run_loop_set_timer(timer, time_delta_ms); 3278 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3279 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3280 btstack_run_loop_add_timer(timer); 3281 } 3282 #endif 3283 3284 static void sco_handler(uint8_t * packet, uint16_t size){ 3285 // lookup connection struct 3286 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3287 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3288 if (!conn) return; 3289 3290 #ifdef ENABLE_SCO_OVER_HCI 3291 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3292 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3293 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3294 packet[2] = 0x3c; 3295 memmove(&packet[3], &packet[23], 63); 3296 size = 63; 3297 } 3298 } 3299 3300 if (hci_have_usb_transport()){ 3301 // Nothing to do 3302 } else { 3303 // 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); 3304 if (hci_stack->synchronous_flow_control_enabled == 0){ 3305 uint32_t now = btstack_run_loop_get_time_ms(); 3306 3307 if (!conn->sco_rx_valid){ 3308 // ignore first 10 packets 3309 conn->sco_rx_count++; 3310 // log_debug("sco rx count %u", conn->sco_rx_count); 3311 if (conn->sco_rx_count == 10) { 3312 // use first timestamp as is and pretent it just started 3313 conn->sco_rx_ms = now; 3314 conn->sco_rx_valid = 1; 3315 conn->sco_rx_count = 0; 3316 sco_schedule_tx(conn); 3317 } 3318 } else { 3319 // track expected arrival timme 3320 conn->sco_rx_count++; 3321 conn->sco_rx_ms += 7; 3322 int delta = (int32_t) (now - conn->sco_rx_ms); 3323 if (delta > 0){ 3324 conn->sco_rx_ms++; 3325 } 3326 // log_debug("sco rx %u", conn->sco_rx_ms); 3327 sco_schedule_tx(conn); 3328 } 3329 } 3330 } 3331 #endif 3332 3333 // deliver to app 3334 if (hci_stack->sco_packet_handler) { 3335 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3336 } 3337 3338 #ifdef HAVE_SCO_TRANSPORT 3339 // We can send one packet for each received packet 3340 conn->sco_tx_ready++; 3341 hci_notify_if_sco_can_send_now(); 3342 #endif 3343 3344 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3345 conn->num_packets_completed++; 3346 hci_stack->host_completed_packets = 1; 3347 hci_run(); 3348 #endif 3349 } 3350 #endif 3351 3352 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3353 hci_dump_packet(packet_type, 1, packet, size); 3354 switch (packet_type) { 3355 case HCI_EVENT_PACKET: 3356 event_handler(packet, size); 3357 break; 3358 case HCI_ACL_DATA_PACKET: 3359 acl_handler(packet, size); 3360 break; 3361 #ifdef ENABLE_CLASSIC 3362 case HCI_SCO_DATA_PACKET: 3363 sco_handler(packet, size); 3364 break; 3365 #endif 3366 default: 3367 break; 3368 } 3369 } 3370 3371 /** 3372 * @brief Add event packet handler. 3373 */ 3374 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3375 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3376 } 3377 3378 3379 /** Register HCI packet handlers */ 3380 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3381 hci_stack->acl_packet_handler = handler; 3382 } 3383 3384 #ifdef ENABLE_CLASSIC 3385 /** 3386 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3387 */ 3388 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3389 hci_stack->sco_packet_handler = handler; 3390 } 3391 #endif 3392 3393 static void hci_state_reset(void){ 3394 // no connections yet 3395 hci_stack->connections = NULL; 3396 3397 // keep discoverable/connectable as this has been requested by the client(s) 3398 // hci_stack->discoverable = 0; 3399 // hci_stack->connectable = 0; 3400 // hci_stack->bondable = 1; 3401 // hci_stack->own_addr_type = 0; 3402 3403 // buffer is free 3404 hci_stack->hci_packet_buffer_reserved = false; 3405 3406 // no pending cmds 3407 hci_stack->decline_reason = 0; 3408 hci_stack->new_scan_enable_value = 0xff; 3409 3410 hci_stack->secure_connections_active = false; 3411 3412 #ifdef ENABLE_CLASSIC 3413 hci_stack->new_page_scan_interval = 0xffff; 3414 hci_stack->new_page_scan_window = 0xffff; 3415 hci_stack->new_page_scan_type = 0xff; 3416 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3417 hci_stack->gap_tasks = 3418 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3419 GAP_TASK_SET_CLASS_OF_DEVICE | 3420 GAP_TASK_SET_LOCAL_NAME | 3421 GAP_TASK_SET_EIR_DATA; 3422 #endif 3423 3424 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3425 hci_stack->classic_read_local_oob_data = true; 3426 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3427 #endif 3428 3429 // LE 3430 #ifdef ENABLE_BLE 3431 memset(hci_stack->le_random_address, 0, 6); 3432 hci_stack->le_random_address_set = 0; 3433 #endif 3434 #ifdef ENABLE_LE_CENTRAL 3435 hci_stack->le_scanning_active = false; 3436 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3437 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3438 hci_stack->le_whitelist_capacity = 0; 3439 #endif 3440 #ifdef ENABLE_LE_PERIPHERAL 3441 hci_stack->le_advertisements_active = false; 3442 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3443 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3444 } 3445 if (hci_stack->le_advertisements_data != NULL){ 3446 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3447 } 3448 #endif 3449 } 3450 3451 #ifdef ENABLE_CLASSIC 3452 /** 3453 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3454 */ 3455 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3456 // store and open remote device db 3457 hci_stack->link_key_db = link_key_db; 3458 if (hci_stack->link_key_db) { 3459 hci_stack->link_key_db->open(); 3460 } 3461 } 3462 #endif 3463 3464 void hci_init(const hci_transport_t *transport, const void *config){ 3465 3466 #ifdef HAVE_MALLOC 3467 if (!hci_stack) { 3468 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3469 } 3470 #else 3471 hci_stack = &hci_stack_static; 3472 #endif 3473 memset(hci_stack, 0, sizeof(hci_stack_t)); 3474 3475 // reference to use transport layer implementation 3476 hci_stack->hci_transport = transport; 3477 3478 // reference to used config 3479 hci_stack->config = config; 3480 3481 // setup pointer for outgoing packet buffer 3482 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3483 3484 // max acl payload size defined in config.h 3485 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3486 3487 // register packet handlers with transport 3488 transport->register_packet_handler(&packet_handler); 3489 3490 hci_stack->state = HCI_STATE_OFF; 3491 3492 // class of device 3493 hci_stack->class_of_device = 0x007a020c; // Smartphone 3494 3495 // bondable by default 3496 hci_stack->bondable = 1; 3497 3498 #ifdef ENABLE_CLASSIC 3499 // classic name 3500 hci_stack->local_name = default_classic_name; 3501 3502 // Master slave policy 3503 hci_stack->master_slave_policy = 1; 3504 3505 // Allow Role Switch 3506 hci_stack->allow_role_switch = 1; 3507 3508 // Default / minimum security level = 2 3509 hci_stack->gap_security_level = LEVEL_2; 3510 3511 // Default Security Mode 4 3512 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3513 3514 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3515 hci_stack->gap_required_encyrption_key_size = 7; 3516 3517 // Link Supervision Timeout 3518 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3519 3520 #endif 3521 3522 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3523 hci_stack->ssp_enable = 1; 3524 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3525 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3526 hci_stack->ssp_auto_accept = 1; 3527 3528 // Secure Connections: enable (requires support from Controller) 3529 hci_stack->secure_connections_enable = true; 3530 3531 // voice setting - signed 16 bit pcm data with CVSD over the air 3532 hci_stack->sco_voice_setting = 0x60; 3533 3534 #ifdef ENABLE_LE_CENTRAL 3535 // connection parameter to use for outgoing connections 3536 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3537 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3538 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3539 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3540 hci_stack->le_connection_latency = 4; // 4 3541 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3542 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3543 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3544 3545 // default LE Scanning 3546 hci_stack->le_scan_type = 0x1; // active 3547 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3548 hci_stack->le_scan_window = 0x30; // 30 ms 3549 #endif 3550 3551 #ifdef ENABLE_LE_PERIPHERAL 3552 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3553 #endif 3554 3555 // connection parameter range used to answer connection parameter update requests in l2cap 3556 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3557 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3558 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3559 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3560 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3561 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3562 3563 hci_state_reset(); 3564 } 3565 3566 void hci_deinit(void){ 3567 #ifdef HAVE_MALLOC 3568 if (hci_stack) { 3569 free(hci_stack); 3570 } 3571 #endif 3572 hci_stack = NULL; 3573 3574 #ifdef ENABLE_CLASSIC 3575 disable_l2cap_timeouts = 0; 3576 #endif 3577 } 3578 3579 /** 3580 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3581 */ 3582 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3583 hci_stack->chipset = chipset_driver; 3584 3585 // reset chipset driver - init is also called on power_up 3586 if (hci_stack->chipset && hci_stack->chipset->init){ 3587 hci_stack->chipset->init(hci_stack->config); 3588 } 3589 } 3590 3591 /** 3592 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3593 */ 3594 void hci_set_control(const btstack_control_t *hardware_control){ 3595 // references to used control implementation 3596 hci_stack->control = hardware_control; 3597 // init with transport config 3598 hardware_control->init(hci_stack->config); 3599 } 3600 3601 void hci_close(void){ 3602 3603 #ifdef ENABLE_CLASSIC 3604 // close remote device db 3605 if (hci_stack->link_key_db) { 3606 hci_stack->link_key_db->close(); 3607 } 3608 #endif 3609 3610 btstack_linked_list_iterator_t lit; 3611 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3612 while (btstack_linked_list_iterator_has_next(&lit)){ 3613 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3614 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3615 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3616 hci_shutdown_connection(connection); 3617 } 3618 3619 hci_power_control(HCI_POWER_OFF); 3620 3621 #ifdef HAVE_MALLOC 3622 free(hci_stack); 3623 #endif 3624 hci_stack = NULL; 3625 } 3626 3627 #ifdef HAVE_SCO_TRANSPORT 3628 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3629 hci_stack->sco_transport = sco_transport; 3630 sco_transport->register_packet_handler(&packet_handler); 3631 } 3632 #endif 3633 3634 #ifdef ENABLE_CLASSIC 3635 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3636 // validate ranage and set 3637 if (encryption_key_size < 7) return; 3638 if (encryption_key_size > 16) return; 3639 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3640 } 3641 3642 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3643 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3644 hci_stack->gap_security_mode = security_mode; 3645 return ERROR_CODE_SUCCESS; 3646 } else { 3647 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3648 } 3649 } 3650 3651 gap_security_mode_t gap_get_security_mode(void){ 3652 return hci_stack->gap_security_mode; 3653 } 3654 3655 void gap_set_security_level(gap_security_level_t security_level){ 3656 hci_stack->gap_security_level = security_level; 3657 } 3658 3659 gap_security_level_t gap_get_security_level(void){ 3660 if (hci_stack->gap_secure_connections_only_mode){ 3661 return LEVEL_4; 3662 } 3663 return hci_stack->gap_security_level; 3664 } 3665 3666 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3667 hci_stack->gap_minimal_service_security_level = security_level; 3668 } 3669 3670 void gap_set_secure_connections_only_mode(bool enable){ 3671 hci_stack->gap_secure_connections_only_mode = enable; 3672 } 3673 3674 bool gap_get_secure_connections_only_mode(void){ 3675 return hci_stack->gap_secure_connections_only_mode; 3676 } 3677 #endif 3678 3679 #ifdef ENABLE_CLASSIC 3680 void gap_set_class_of_device(uint32_t class_of_device){ 3681 hci_stack->class_of_device = class_of_device; 3682 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3683 hci_run(); 3684 } 3685 3686 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3687 hci_stack->default_link_policy_settings = default_link_policy_settings; 3688 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3689 hci_run(); 3690 } 3691 3692 void gap_set_allow_role_switch(bool allow_role_switch){ 3693 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3694 } 3695 3696 uint8_t hci_get_allow_role_switch(void){ 3697 return hci_stack->allow_role_switch; 3698 } 3699 3700 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3701 hci_stack->link_supervision_timeout = link_supervision_timeout; 3702 } 3703 3704 void hci_disable_l2cap_timeout_check(void){ 3705 disable_l2cap_timeouts = 1; 3706 } 3707 #endif 3708 3709 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3710 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3711 void hci_set_bd_addr(bd_addr_t addr){ 3712 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3713 hci_stack->custom_bd_addr_set = 1; 3714 } 3715 #endif 3716 3717 // State-Module-Driver overview 3718 // state module low-level 3719 // HCI_STATE_OFF off close 3720 // HCI_STATE_INITIALIZING, on open 3721 // HCI_STATE_WORKING, on open 3722 // HCI_STATE_HALTING, on open 3723 // HCI_STATE_SLEEPING, off/sleep close 3724 // HCI_STATE_FALLING_ASLEEP on open 3725 3726 static int hci_power_control_on(void){ 3727 3728 // power on 3729 int err = 0; 3730 if (hci_stack->control && hci_stack->control->on){ 3731 err = (*hci_stack->control->on)(); 3732 } 3733 if (err){ 3734 log_error( "POWER_ON failed"); 3735 hci_emit_hci_open_failed(); 3736 return err; 3737 } 3738 3739 // int chipset driver 3740 if (hci_stack->chipset && hci_stack->chipset->init){ 3741 hci_stack->chipset->init(hci_stack->config); 3742 } 3743 3744 // init transport 3745 if (hci_stack->hci_transport->init){ 3746 hci_stack->hci_transport->init(hci_stack->config); 3747 } 3748 3749 // open transport 3750 err = hci_stack->hci_transport->open(); 3751 if (err){ 3752 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3753 if (hci_stack->control && hci_stack->control->off){ 3754 (*hci_stack->control->off)(); 3755 } 3756 hci_emit_hci_open_failed(); 3757 return err; 3758 } 3759 return 0; 3760 } 3761 3762 static void hci_power_control_off(void){ 3763 3764 log_info("hci_power_control_off"); 3765 3766 // close low-level device 3767 hci_stack->hci_transport->close(); 3768 3769 log_info("hci_power_control_off - hci_transport closed"); 3770 3771 // power off 3772 if (hci_stack->control && hci_stack->control->off){ 3773 (*hci_stack->control->off)(); 3774 } 3775 3776 log_info("hci_power_control_off - control closed"); 3777 3778 hci_stack->state = HCI_STATE_OFF; 3779 } 3780 3781 static void hci_power_control_sleep(void){ 3782 3783 log_info("hci_power_control_sleep"); 3784 3785 #if 0 3786 // don't close serial port during sleep 3787 3788 // close low-level device 3789 hci_stack->hci_transport->close(hci_stack->config); 3790 #endif 3791 3792 // sleep mode 3793 if (hci_stack->control && hci_stack->control->sleep){ 3794 (*hci_stack->control->sleep)(); 3795 } 3796 3797 hci_stack->state = HCI_STATE_SLEEPING; 3798 } 3799 3800 static int hci_power_control_wake(void){ 3801 3802 log_info("hci_power_control_wake"); 3803 3804 // wake on 3805 if (hci_stack->control && hci_stack->control->wake){ 3806 (*hci_stack->control->wake)(); 3807 } 3808 3809 #if 0 3810 // open low-level device 3811 int err = hci_stack->hci_transport->open(hci_stack->config); 3812 if (err){ 3813 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3814 if (hci_stack->control && hci_stack->control->off){ 3815 (*hci_stack->control->off)(); 3816 } 3817 hci_emit_hci_open_failed(); 3818 return err; 3819 } 3820 #endif 3821 3822 return 0; 3823 } 3824 3825 static void hci_power_transition_to_initializing(void){ 3826 // set up state machine 3827 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3828 hci_stack->hci_packet_buffer_reserved = false; 3829 hci_stack->state = HCI_STATE_INITIALIZING; 3830 hci_stack->substate = HCI_INIT_SEND_RESET; 3831 } 3832 3833 // returns error 3834 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3835 int err; 3836 switch (power_mode){ 3837 case HCI_POWER_ON: 3838 err = hci_power_control_on(); 3839 if (err != 0) { 3840 log_error("hci_power_control_on() error %d", err); 3841 return err; 3842 } 3843 hci_power_transition_to_initializing(); 3844 break; 3845 case HCI_POWER_OFF: 3846 // do nothing 3847 break; 3848 case HCI_POWER_SLEEP: 3849 // do nothing (with SLEEP == OFF) 3850 break; 3851 default: 3852 btstack_assert(false); 3853 break; 3854 } 3855 return ERROR_CODE_SUCCESS; 3856 } 3857 3858 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3859 switch (power_mode){ 3860 case HCI_POWER_ON: 3861 // do nothing 3862 break; 3863 case HCI_POWER_OFF: 3864 // no connections yet, just turn it off 3865 hci_power_control_off(); 3866 break; 3867 case HCI_POWER_SLEEP: 3868 // no connections yet, just turn it off 3869 hci_power_control_sleep(); 3870 break; 3871 default: 3872 btstack_assert(false); 3873 break; 3874 } 3875 return ERROR_CODE_SUCCESS; 3876 } 3877 3878 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3879 switch (power_mode){ 3880 case HCI_POWER_ON: 3881 // do nothing 3882 break; 3883 case HCI_POWER_OFF: 3884 // see hci_run 3885 hci_stack->state = HCI_STATE_HALTING; 3886 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3887 break; 3888 case HCI_POWER_SLEEP: 3889 // see hci_run 3890 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3891 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3892 break; 3893 default: 3894 btstack_assert(false); 3895 break; 3896 } 3897 return ERROR_CODE_SUCCESS; 3898 } 3899 3900 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3901 switch (power_mode){ 3902 case HCI_POWER_ON: 3903 hci_power_transition_to_initializing(); 3904 break; 3905 case HCI_POWER_OFF: 3906 // do nothing 3907 break; 3908 case HCI_POWER_SLEEP: 3909 // see hci_run 3910 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3911 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3912 break; 3913 default: 3914 btstack_assert(false); 3915 break; 3916 } 3917 return ERROR_CODE_SUCCESS; 3918 } 3919 3920 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3921 switch (power_mode){ 3922 case HCI_POWER_ON: 3923 3924 #ifdef HAVE_PLATFORM_IPHONE_OS 3925 // nothing to do, if H4 supports power management 3926 if (btstack_control_iphone_power_management_enabled()){ 3927 hci_stack->state = HCI_STATE_INITIALIZING; 3928 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3929 break; 3930 } 3931 #endif 3932 hci_power_transition_to_initializing(); 3933 break; 3934 case HCI_POWER_OFF: 3935 // see hci_run 3936 hci_stack->state = HCI_STATE_HALTING; 3937 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3938 break; 3939 case HCI_POWER_SLEEP: 3940 // do nothing 3941 break; 3942 default: 3943 btstack_assert(false); 3944 break; 3945 } 3946 return ERROR_CODE_SUCCESS; 3947 } 3948 3949 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3950 int err; 3951 switch (power_mode){ 3952 case HCI_POWER_ON: 3953 #ifdef HAVE_PLATFORM_IPHONE_OS 3954 // nothing to do, if H4 supports power management 3955 if (btstack_control_iphone_power_management_enabled()){ 3956 hci_stack->state = HCI_STATE_INITIALIZING; 3957 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3958 hci_update_scan_enable(); 3959 break; 3960 } 3961 #endif 3962 err = hci_power_control_wake(); 3963 if (err) return err; 3964 hci_power_transition_to_initializing(); 3965 break; 3966 case HCI_POWER_OFF: 3967 hci_stack->state = HCI_STATE_HALTING; 3968 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3969 break; 3970 case HCI_POWER_SLEEP: 3971 // do nothing 3972 break; 3973 default: 3974 btstack_assert(false); 3975 break; 3976 } 3977 return ERROR_CODE_SUCCESS; 3978 } 3979 3980 int hci_power_control(HCI_POWER_MODE power_mode){ 3981 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3982 int err = 0; 3983 switch (hci_stack->state){ 3984 case HCI_STATE_OFF: 3985 err = hci_power_control_state_off(power_mode); 3986 break; 3987 case HCI_STATE_INITIALIZING: 3988 err = hci_power_control_state_initializing(power_mode); 3989 break; 3990 case HCI_STATE_WORKING: 3991 err = hci_power_control_state_working(power_mode); 3992 break; 3993 case HCI_STATE_HALTING: 3994 err = hci_power_control_state_halting(power_mode); 3995 break; 3996 case HCI_STATE_FALLING_ASLEEP: 3997 err = hci_power_control_state_falling_asleep(power_mode); 3998 break; 3999 case HCI_STATE_SLEEPING: 4000 err = hci_power_control_state_sleeping(power_mode); 4001 break; 4002 default: 4003 btstack_assert(false); 4004 break; 4005 } 4006 if (err != 0){ 4007 return err; 4008 } 4009 4010 // create internal event 4011 hci_emit_state(); 4012 4013 // trigger next/first action 4014 hci_run(); 4015 4016 return 0; 4017 } 4018 4019 4020 #ifdef ENABLE_CLASSIC 4021 4022 static void hci_update_scan_enable(void){ 4023 // 2 = page scan, 1 = inq scan 4024 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4025 hci_run(); 4026 } 4027 4028 void gap_discoverable_control(uint8_t enable){ 4029 if (enable) enable = 1; // normalize argument 4030 4031 if (hci_stack->discoverable == enable){ 4032 hci_emit_discoverable_enabled(hci_stack->discoverable); 4033 return; 4034 } 4035 4036 hci_stack->discoverable = enable; 4037 hci_update_scan_enable(); 4038 } 4039 4040 void gap_connectable_control(uint8_t enable){ 4041 if (enable) enable = 1; // normalize argument 4042 4043 // don't emit event 4044 if (hci_stack->connectable == enable) return; 4045 4046 hci_stack->connectable = enable; 4047 hci_update_scan_enable(); 4048 } 4049 #endif 4050 4051 void gap_local_bd_addr(bd_addr_t address_buffer){ 4052 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4053 } 4054 4055 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4056 static void hci_host_num_completed_packets(void){ 4057 4058 // create packet manually as arrays are not supported and num_commands should not get reduced 4059 hci_reserve_packet_buffer(); 4060 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4061 4062 uint16_t size = 0; 4063 uint16_t num_handles = 0; 4064 packet[size++] = 0x35; 4065 packet[size++] = 0x0c; 4066 size++; // skip param len 4067 size++; // skip num handles 4068 4069 // add { handle, packets } entries 4070 btstack_linked_item_t * it; 4071 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4072 hci_connection_t * connection = (hci_connection_t *) it; 4073 if (connection->num_packets_completed){ 4074 little_endian_store_16(packet, size, connection->con_handle); 4075 size += 2; 4076 little_endian_store_16(packet, size, connection->num_packets_completed); 4077 size += 2; 4078 // 4079 num_handles++; 4080 connection->num_packets_completed = 0; 4081 } 4082 } 4083 4084 packet[2] = size - 3; 4085 packet[3] = num_handles; 4086 4087 hci_stack->host_completed_packets = 0; 4088 4089 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4090 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4091 4092 // release packet buffer for synchronous transport implementations 4093 if (hci_transport_synchronous()){ 4094 hci_release_packet_buffer(); 4095 hci_emit_transport_packet_sent(); 4096 } 4097 } 4098 #endif 4099 4100 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4101 UNUSED(ds); 4102 hci_stack->substate = HCI_HALTING_CLOSE; 4103 // allow packet handlers to defer final shutdown 4104 hci_emit_state(); 4105 hci_run(); 4106 } 4107 4108 static bool hci_run_acl_fragments(void){ 4109 if (hci_stack->acl_fragmentation_total_size > 0u) { 4110 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4111 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4112 if (connection) { 4113 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4114 hci_send_acl_packet_fragments(connection); 4115 return true; 4116 } 4117 } else { 4118 // connection gone -> discard further fragments 4119 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4120 hci_stack->acl_fragmentation_total_size = 0; 4121 hci_stack->acl_fragmentation_pos = 0; 4122 } 4123 } 4124 return false; 4125 } 4126 4127 #ifdef ENABLE_CLASSIC 4128 static bool hci_run_general_gap_classic(void){ 4129 4130 // assert stack is working and classic is active 4131 if (hci_classic_supported() == false) return false; 4132 if (hci_stack->state != HCI_STATE_WORKING) return false; 4133 4134 // decline incoming connections 4135 if (hci_stack->decline_reason){ 4136 uint8_t reason = hci_stack->decline_reason; 4137 hci_stack->decline_reason = 0; 4138 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4139 return true; 4140 } 4141 4142 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4143 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4144 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4145 return true; 4146 } 4147 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4148 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4149 gap_run_set_local_name(); 4150 return true; 4151 } 4152 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4153 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4154 gap_run_set_eir_data(); 4155 return true; 4156 } 4157 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4158 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4159 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4160 return true; 4161 } 4162 // write page scan activity 4163 if (hci_stack->new_page_scan_interval != 0xffff) { 4164 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4165 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4166 hci_stack->new_page_scan_interval = 0xffff; 4167 hci_stack->new_page_scan_window = 0xffff; 4168 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4169 return true; 4170 } 4171 // write page scan type 4172 if (hci_stack->new_page_scan_type != 0xff) { 4173 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4174 hci_stack->new_page_scan_type = 0xff; 4175 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4176 return true; 4177 } 4178 // send scan enable 4179 if (hci_stack->new_scan_enable_value != 0xff) { 4180 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4181 hci_stack->new_scan_enable_value = 0xff; 4182 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4183 return true; 4184 } 4185 4186 // start/stop inquiry 4187 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4188 uint8_t duration = hci_stack->inquiry_state; 4189 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4190 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4191 return true; 4192 } 4193 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4194 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4195 hci_send_cmd(&hci_inquiry_cancel); 4196 return true; 4197 } 4198 // remote name request 4199 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4200 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4201 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4202 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4203 return true; 4204 } 4205 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4206 // Local OOB data 4207 if (hci_stack->classic_read_local_oob_data){ 4208 hci_stack->classic_read_local_oob_data = false; 4209 if (hci_stack->local_supported_commands[1] & 0x10u){ 4210 hci_send_cmd(&hci_read_local_extended_oob_data); 4211 } else { 4212 hci_send_cmd(&hci_read_local_oob_data); 4213 } 4214 } 4215 #endif 4216 // pairing 4217 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4218 uint8_t state = hci_stack->gap_pairing_state; 4219 uint8_t pin_code[16]; 4220 switch (state){ 4221 case GAP_PAIRING_STATE_SEND_PIN: 4222 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4223 memset(pin_code, 0, 16); 4224 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4225 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4226 break; 4227 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4228 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4229 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4230 break; 4231 case GAP_PAIRING_STATE_SEND_PASSKEY: 4232 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4233 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4234 break; 4235 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4236 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4237 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4238 break; 4239 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4240 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4241 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4242 break; 4243 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4244 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4245 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4246 break; 4247 default: 4248 break; 4249 } 4250 return true; 4251 } 4252 return false; 4253 } 4254 #endif 4255 4256 #ifdef ENABLE_BLE 4257 static bool hci_run_general_gap_le(void){ 4258 4259 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4260 4261 if (hci_stack->state != HCI_STATE_WORKING) return false; 4262 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4263 4264 4265 // Phase 1: collect what to stop 4266 4267 bool scanning_stop = false; 4268 bool connecting_stop = false; 4269 bool advertising_stop = false; 4270 4271 #ifndef ENABLE_LE_CENTRAL 4272 UNUSED(scanning_stop); 4273 UNUSED(connecting_stop); 4274 #endif 4275 #ifndef ENABLE_LE_PERIPHERAL 4276 UNUSED(advertising_stop); 4277 #endif 4278 4279 // check if whitelist needs modification 4280 bool whitelist_modification_pending = false; 4281 btstack_linked_list_iterator_t lit; 4282 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4283 while (btstack_linked_list_iterator_has_next(&lit)){ 4284 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4285 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4286 whitelist_modification_pending = true; 4287 break; 4288 } 4289 } 4290 // check if resolving list needs modification 4291 bool resolving_list_modification_pending = false; 4292 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4293 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4294 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4295 resolving_list_modification_pending = true; 4296 } 4297 #endif 4298 4299 #ifdef ENABLE_LE_CENTRAL 4300 // scanning control 4301 if (hci_stack->le_scanning_active) { 4302 // stop if: 4303 // - parameter change required 4304 // - it's disabled 4305 // - whitelist change required but used for scanning 4306 // - resolving list modified 4307 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4308 if ((hci_stack->le_scanning_param_update) || 4309 !hci_stack->le_scanning_enabled || 4310 scanning_uses_whitelist || 4311 resolving_list_modification_pending){ 4312 4313 scanning_stop = true; 4314 } 4315 } 4316 #endif 4317 4318 #ifdef ENABLE_LE_CENTRAL 4319 // connecting control 4320 bool connecting_with_whitelist; 4321 switch (hci_stack->le_connecting_state){ 4322 case LE_CONNECTING_DIRECT: 4323 case LE_CONNECTING_WHITELIST: 4324 // stop connecting if: 4325 // - connecting uses white and whitelist modification pending 4326 // - if it got disabled 4327 // - resolving list modified 4328 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4329 if ((connecting_with_whitelist && whitelist_modification_pending) || 4330 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4331 resolving_list_modification_pending) { 4332 4333 connecting_stop = true; 4334 } 4335 break; 4336 default: 4337 break; 4338 } 4339 #endif 4340 4341 #ifdef ENABLE_LE_PERIPHERAL 4342 // le advertisement control 4343 if (hci_stack->le_advertisements_active){ 4344 // stop if: 4345 // - parameter change required 4346 // - it's disabled 4347 // - whitelist change required but used for advertisement filter policy 4348 // - resolving list modified 4349 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4350 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4351 if (advertising_change || 4352 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4353 (advertising_uses_whitelist & whitelist_modification_pending) || 4354 resolving_list_modification_pending) { 4355 4356 advertising_stop = true; 4357 } 4358 } 4359 #endif 4360 4361 4362 // Phase 2: stop everything that should be off during modifications 4363 4364 #ifdef ENABLE_LE_CENTRAL 4365 if (scanning_stop){ 4366 hci_stack->le_scanning_active = false; 4367 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4368 return true; 4369 } 4370 #endif 4371 4372 #ifdef ENABLE_LE_CENTRAL 4373 if (connecting_stop){ 4374 hci_send_cmd(&hci_le_create_connection_cancel); 4375 return true; 4376 } 4377 #endif 4378 4379 #ifdef ENABLE_LE_PERIPHERAL 4380 if (advertising_stop){ 4381 hci_stack->le_advertisements_active = false; 4382 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4383 return true; 4384 } 4385 #endif 4386 4387 // Phase 3: modify 4388 4389 #ifdef ENABLE_LE_CENTRAL 4390 if (hci_stack->le_scanning_param_update){ 4391 hci_stack->le_scanning_param_update = false; 4392 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4393 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4394 return true; 4395 } 4396 #endif 4397 4398 #ifdef ENABLE_LE_PERIPHERAL 4399 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4400 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4401 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4402 hci_send_cmd(&hci_le_set_advertising_parameters, 4403 hci_stack->le_advertisements_interval_min, 4404 hci_stack->le_advertisements_interval_max, 4405 hci_stack->le_advertisements_type, 4406 hci_stack->le_advertisements_own_addr_type, 4407 hci_stack->le_advertisements_direct_address_type, 4408 hci_stack->le_advertisements_direct_address, 4409 hci_stack->le_advertisements_channel_map, 4410 hci_stack->le_advertisements_filter_policy); 4411 return true; 4412 } 4413 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4414 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4415 uint8_t adv_data_clean[31]; 4416 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4417 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4418 hci_stack->le_advertisements_data_len); 4419 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4420 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4421 return true; 4422 } 4423 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4424 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4425 uint8_t scan_data_clean[31]; 4426 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4427 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4428 hci_stack->le_scan_response_data_len); 4429 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4430 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4431 return true; 4432 } 4433 #endif 4434 4435 4436 #ifdef ENABLE_LE_CENTRAL 4437 // if connect with whitelist was active and is not cancelled yet, wait until next time 4438 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4439 #endif 4440 4441 // LE Whitelist Management 4442 if (whitelist_modification_pending){ 4443 // add/remove entries 4444 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4445 while (btstack_linked_list_iterator_has_next(&lit)){ 4446 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4447 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4448 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4449 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4450 return true; 4451 } 4452 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4453 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4454 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4455 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4456 return true; 4457 } 4458 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4459 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4460 btstack_memory_whitelist_entry_free(entry); 4461 } 4462 } 4463 } 4464 4465 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4466 // LE Resolving List Management 4467 if (resolving_list_supported) { 4468 uint16_t i; 4469 switch (hci_stack->le_resolving_list_state) { 4470 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4471 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4472 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4473 return true; 4474 case LE_RESOLVING_LIST_READ_SIZE: 4475 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4476 hci_send_cmd(&hci_le_read_resolving_list_size); 4477 return true; 4478 case LE_RESOLVING_LIST_SEND_CLEAR: 4479 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4480 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4481 sizeof(hci_stack->le_resolving_list_add_entries)); 4482 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4483 sizeof(hci_stack->le_resolving_list_remove_entries)); 4484 hci_send_cmd(&hci_le_clear_resolving_list); 4485 return true; 4486 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4487 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4488 uint8_t offset = i >> 3; 4489 uint8_t mask = 1 << (i & 7); 4490 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4491 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4492 bd_addr_t peer_identity_addreses; 4493 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4494 sm_key_t peer_irk; 4495 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4496 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4497 4498 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4499 // trigger whitelist entry 'update' (work around for controller bug) 4500 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4501 while (btstack_linked_list_iterator_has_next(&lit)) { 4502 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4503 if (entry->address_type != peer_identity_addr_type) continue; 4504 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4505 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4506 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4507 } 4508 #endif 4509 4510 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4511 peer_identity_addreses); 4512 return true; 4513 } 4514 4515 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4516 4517 /* fall through */ 4518 4519 case LE_RESOLVING_LIST_ADD_ENTRIES: 4520 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4521 uint8_t offset = i >> 3; 4522 uint8_t mask = 1 << (i & 7); 4523 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4524 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4525 bd_addr_t peer_identity_addreses; 4526 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4527 sm_key_t peer_irk; 4528 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4529 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4530 const uint8_t *local_irk = gap_get_persistent_irk(); 4531 // command uses format specifier 'P' that stores 16-byte value without flip 4532 uint8_t local_irk_flipped[16]; 4533 uint8_t peer_irk_flipped[16]; 4534 reverse_128(local_irk, local_irk_flipped); 4535 reverse_128(peer_irk, peer_irk_flipped); 4536 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4537 peer_irk_flipped, local_irk_flipped); 4538 return true; 4539 } 4540 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4541 break; 4542 4543 default: 4544 break; 4545 } 4546 } 4547 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4548 #endif 4549 4550 // Phase 4: restore state 4551 4552 #ifdef ENABLE_LE_CENTRAL 4553 // re-start scanning 4554 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4555 hci_stack->le_scanning_active = true; 4556 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4557 return true; 4558 } 4559 #endif 4560 4561 #ifdef ENABLE_LE_CENTRAL 4562 // re-start connecting 4563 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4564 bd_addr_t null_addr; 4565 memset(null_addr, 0, 6); 4566 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4567 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4568 hci_send_cmd(&hci_le_create_connection, 4569 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4570 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4571 1, // use whitelist 4572 0, // peer address type 4573 null_addr, // peer bd addr 4574 hci_stack->le_connection_own_addr_type, // our addr type: 4575 hci_stack->le_connection_interval_min, // conn interval min 4576 hci_stack->le_connection_interval_max, // conn interval max 4577 hci_stack->le_connection_latency, // conn latency 4578 hci_stack->le_supervision_timeout, // conn latency 4579 hci_stack->le_minimum_ce_length, // min ce length 4580 hci_stack->le_maximum_ce_length // max ce length 4581 ); 4582 return true; 4583 } 4584 #endif 4585 4586 #ifdef ENABLE_LE_PERIPHERAL 4587 // re-start advertising 4588 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4589 // check if advertisements should be enabled given 4590 hci_stack->le_advertisements_active = true; 4591 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4592 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4593 return true; 4594 } 4595 #endif 4596 4597 return false; 4598 } 4599 #endif 4600 4601 static bool hci_run_general_pending_commands(void){ 4602 btstack_linked_item_t * it; 4603 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4604 hci_connection_t * connection = (hci_connection_t *) it; 4605 4606 switch(connection->state){ 4607 case SEND_CREATE_CONNECTION: 4608 switch(connection->address_type){ 4609 #ifdef ENABLE_CLASSIC 4610 case BD_ADDR_TYPE_ACL: 4611 log_info("sending hci_create_connection"); 4612 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4613 break; 4614 #endif 4615 default: 4616 #ifdef ENABLE_BLE 4617 #ifdef ENABLE_LE_CENTRAL 4618 log_info("sending hci_le_create_connection"); 4619 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4620 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4621 hci_send_cmd(&hci_le_create_connection, 4622 hci_stack->le_connection_scan_interval, // conn scan interval 4623 hci_stack->le_connection_scan_window, // conn scan windows 4624 0, // don't use whitelist 4625 connection->address_type, // peer address type 4626 connection->address, // peer bd addr 4627 hci_stack->le_connection_own_addr_type, // our addr type: 4628 hci_stack->le_connection_interval_min, // conn interval min 4629 hci_stack->le_connection_interval_max, // conn interval max 4630 hci_stack->le_connection_latency, // conn latency 4631 hci_stack->le_supervision_timeout, // conn latency 4632 hci_stack->le_minimum_ce_length, // min ce length 4633 hci_stack->le_maximum_ce_length // max ce length 4634 ); 4635 connection->state = SENT_CREATE_CONNECTION; 4636 #endif 4637 #endif 4638 break; 4639 } 4640 return true; 4641 4642 #ifdef ENABLE_CLASSIC 4643 case RECEIVED_CONNECTION_REQUEST: 4644 connection->role = HCI_ROLE_SLAVE; 4645 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4646 log_info("sending hci_accept_connection_request"); 4647 connection->state = ACCEPTED_CONNECTION_REQUEST; 4648 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4649 } 4650 return true; 4651 #endif 4652 4653 #ifdef ENABLE_BLE 4654 #ifdef ENABLE_LE_CENTRAL 4655 case SEND_CANCEL_CONNECTION: 4656 connection->state = SENT_CANCEL_CONNECTION; 4657 hci_send_cmd(&hci_le_create_connection_cancel); 4658 return true; 4659 #endif 4660 #endif 4661 case SEND_DISCONNECT: 4662 connection->state = SENT_DISCONNECT; 4663 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4664 return true; 4665 4666 default: 4667 break; 4668 } 4669 4670 // no further commands if connection is about to get shut down 4671 if (connection->state == SENT_DISCONNECT) continue; 4672 4673 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4674 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4675 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4676 return true; 4677 } 4678 4679 #ifdef ENABLE_CLASSIC 4680 4681 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4682 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4683 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4684 return true; 4685 } 4686 4687 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4688 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4689 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4690 return true; 4691 } 4692 4693 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4694 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4695 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4696 return true; 4697 } 4698 4699 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4700 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4701 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4702 return true; 4703 } 4704 4705 // Handling link key request requires remote supported features 4706 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4707 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4708 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4709 4710 // lookup link key using cached key first 4711 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4712 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4713 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4714 } 4715 4716 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4717 if (have_link_key && security_level_sufficient){ 4718 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4719 } else { 4720 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4721 } 4722 return true; 4723 } 4724 4725 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4726 log_info("denying to pin request"); 4727 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4728 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4729 return true; 4730 } 4731 4732 // security assessment requires remote features 4733 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4734 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4735 hci_ssp_assess_security_on_io_cap_request(connection); 4736 // 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 4737 } 4738 4739 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4740 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4741 // set authentication requirements: 4742 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4743 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4744 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4745 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4746 authreq |= 1; 4747 } 4748 bool bonding = hci_stack->bondable; 4749 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4750 // if we have received IO Cap Response, we're in responder role 4751 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4752 if (bonding && !remote_bonding){ 4753 log_info("Remote not bonding, dropping local flag"); 4754 bonding = false; 4755 } 4756 } 4757 if (bonding){ 4758 if (connection->bonding_flags & BONDING_DEDICATED){ 4759 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4760 } else { 4761 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4762 } 4763 } 4764 uint8_t have_oob_data = 0; 4765 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4766 if (connection->classic_oob_c_192 != NULL){ 4767 have_oob_data |= 1; 4768 } 4769 if (connection->classic_oob_c_256 != NULL){ 4770 have_oob_data |= 2; 4771 } 4772 #endif 4773 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4774 return true; 4775 } 4776 4777 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4778 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4779 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4780 return true; 4781 } 4782 4783 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4784 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4785 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4786 const uint8_t zero[16] = { 0 }; 4787 const uint8_t * r_192 = zero; 4788 const uint8_t * c_192 = zero; 4789 const uint8_t * r_256 = zero; 4790 const uint8_t * c_256 = zero; 4791 // verify P-256 OOB 4792 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4793 c_256 = connection->classic_oob_c_256; 4794 if (connection->classic_oob_r_256 != NULL) { 4795 r_256 = connection->classic_oob_r_256; 4796 } 4797 } 4798 // verify P-192 OOB 4799 if ((connection->classic_oob_c_192 != NULL)) { 4800 c_192 = connection->classic_oob_c_192; 4801 if (connection->classic_oob_r_192 != NULL) { 4802 r_192 = connection->classic_oob_r_192; 4803 } 4804 } 4805 4806 // assess security 4807 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4808 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4809 if (need_level_4 && !can_reach_level_4){ 4810 log_info("Level 4 required, but not possible -> abort"); 4811 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4812 // send oob negative reply 4813 c_256 = NULL; 4814 c_192 = NULL; 4815 } 4816 4817 // Reply 4818 if (c_256 != zero) { 4819 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4820 } else if (c_192 != zero){ 4821 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4822 } else { 4823 hci_stack->classic_oob_con_handle = connection->con_handle; 4824 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4825 } 4826 return true; 4827 } 4828 #endif 4829 4830 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4831 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4832 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4833 return true; 4834 } 4835 4836 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4837 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4838 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4839 return true; 4840 } 4841 4842 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4843 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4844 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4845 return true; 4846 } 4847 4848 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4849 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4850 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4851 connection->state = SENT_DISCONNECT; 4852 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4853 return true; 4854 } 4855 4856 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4857 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4858 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4859 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4860 return true; 4861 } 4862 4863 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4864 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4865 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4866 return true; 4867 } 4868 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4869 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4870 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4871 return true; 4872 } 4873 #endif 4874 4875 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4876 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4877 #ifdef ENABLE_CLASSIC 4878 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4879 #endif 4880 if (connection->state != SENT_DISCONNECT){ 4881 connection->state = SENT_DISCONNECT; 4882 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4883 return true; 4884 } 4885 } 4886 4887 #ifdef ENABLE_CLASSIC 4888 uint16_t sniff_min_interval; 4889 switch (connection->sniff_min_interval){ 4890 case 0: 4891 break; 4892 case 0xffff: 4893 connection->sniff_min_interval = 0; 4894 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4895 return true; 4896 default: 4897 sniff_min_interval = connection->sniff_min_interval; 4898 connection->sniff_min_interval = 0; 4899 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4900 return true; 4901 } 4902 4903 if (connection->sniff_subrating_max_latency != 0xffff){ 4904 uint16_t max_latency = connection->sniff_subrating_max_latency; 4905 connection->sniff_subrating_max_latency = 0; 4906 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4907 return true; 4908 } 4909 4910 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4911 uint8_t service_type = (uint8_t) connection->qos_service_type; 4912 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4913 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); 4914 return true; 4915 } 4916 4917 if (connection->request_role != HCI_ROLE_INVALID){ 4918 hci_role_t role = connection->request_role; 4919 connection->request_role = HCI_ROLE_INVALID; 4920 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4921 return true; 4922 } 4923 #endif 4924 4925 #ifdef ENABLE_BLE 4926 switch (connection->le_con_parameter_update_state){ 4927 // response to L2CAP CON PARAMETER UPDATE REQUEST 4928 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4929 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4930 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4931 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4932 0x0000, 0xffff); 4933 return true; 4934 case CON_PARAMETER_UPDATE_REPLY: 4935 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4936 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4937 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4938 0x0000, 0xffff); 4939 return true; 4940 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4941 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4942 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4943 return true; 4944 default: 4945 break; 4946 } 4947 if (connection->le_phy_update_all_phys != 0xffu){ 4948 uint8_t all_phys = connection->le_phy_update_all_phys; 4949 connection->le_phy_update_all_phys = 0xff; 4950 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); 4951 return true; 4952 } 4953 #endif 4954 } 4955 return false; 4956 } 4957 4958 static void hci_run(void){ 4959 4960 bool done; 4961 4962 // send continuation fragments first, as they block the prepared packet buffer 4963 done = hci_run_acl_fragments(); 4964 if (done) return; 4965 4966 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4967 // send host num completed packets next as they don't require num_cmd_packets > 0 4968 if (!hci_can_send_comand_packet_transport()) return; 4969 if (hci_stack->host_completed_packets){ 4970 hci_host_num_completed_packets(); 4971 return; 4972 } 4973 #endif 4974 4975 if (!hci_can_send_command_packet_now()) return; 4976 4977 // global/non-connection oriented commands 4978 4979 4980 #ifdef ENABLE_CLASSIC 4981 // general gap classic 4982 done = hci_run_general_gap_classic(); 4983 if (done) return; 4984 #endif 4985 4986 #ifdef ENABLE_BLE 4987 // general gap le 4988 done = hci_run_general_gap_le(); 4989 if (done) return; 4990 #endif 4991 4992 // send pending HCI commands 4993 done = hci_run_general_pending_commands(); 4994 if (done) return; 4995 4996 // stack state sub statemachines 4997 hci_connection_t * connection; 4998 switch (hci_stack->state){ 4999 case HCI_STATE_INITIALIZING: 5000 hci_initializing_run(); 5001 break; 5002 5003 case HCI_STATE_HALTING: 5004 5005 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5006 switch (hci_stack->substate){ 5007 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5008 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5009 5010 #ifdef ENABLE_BLE 5011 #ifdef ENABLE_LE_CENTRAL 5012 // free whitelist entries 5013 { 5014 btstack_linked_list_iterator_t lit; 5015 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5016 while (btstack_linked_list_iterator_has_next(&lit)){ 5017 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5018 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5019 btstack_memory_whitelist_entry_free(entry); 5020 } 5021 } 5022 #endif 5023 #endif 5024 // close all open connections 5025 connection = (hci_connection_t *) hci_stack->connections; 5026 if (connection){ 5027 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5028 if (!hci_can_send_command_packet_now()) return; 5029 5030 // check state 5031 if (connection->state == SENT_DISCONNECT) return; 5032 connection->state = SENT_DISCONNECT; 5033 5034 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5035 5036 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5037 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5038 5039 // ... which would be ignored anyway as we shutdown (free) the connection now 5040 hci_shutdown_connection(connection); 5041 5042 // finally, send the disconnect command 5043 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5044 return; 5045 } 5046 5047 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5048 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5049 log_info("HCI_STATE_HALTING: wait 50 ms"); 5050 hci_stack->substate = HCI_HALTING_W4_TIMER; 5051 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5052 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5053 btstack_run_loop_add_timer(&hci_stack->timeout); 5054 break; 5055 } 5056 5057 /* fall through */ 5058 5059 case HCI_HALTING_CLOSE: 5060 log_info("HCI_STATE_HALTING, calling off"); 5061 5062 // switch mode 5063 hci_power_control_off(); 5064 5065 log_info("HCI_STATE_HALTING, emitting state"); 5066 hci_emit_state(); 5067 log_info("HCI_STATE_HALTING, done"); 5068 break; 5069 5070 case HCI_HALTING_W4_TIMER: 5071 // keep waiting 5072 5073 break; 5074 default: 5075 break; 5076 } 5077 5078 break; 5079 5080 case HCI_STATE_FALLING_ASLEEP: 5081 switch(hci_stack->substate) { 5082 case HCI_FALLING_ASLEEP_DISCONNECT: 5083 log_info("HCI_STATE_FALLING_ASLEEP"); 5084 // close all open connections 5085 connection = (hci_connection_t *) hci_stack->connections; 5086 5087 #ifdef HAVE_PLATFORM_IPHONE_OS 5088 // don't close connections, if H4 supports power management 5089 if (btstack_control_iphone_power_management_enabled()){ 5090 connection = NULL; 5091 } 5092 #endif 5093 if (connection){ 5094 5095 // send disconnect 5096 if (!hci_can_send_command_packet_now()) return; 5097 5098 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5099 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5100 5101 // send disconnected event right away - causes higher layer connections to get closed, too. 5102 hci_shutdown_connection(connection); 5103 return; 5104 } 5105 5106 if (hci_classic_supported()){ 5107 // disable page and inquiry scan 5108 if (!hci_can_send_command_packet_now()) return; 5109 5110 log_info("HCI_STATE_HALTING, disabling inq scans"); 5111 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5112 5113 // continue in next sub state 5114 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5115 break; 5116 } 5117 5118 /* fall through */ 5119 5120 case HCI_FALLING_ASLEEP_COMPLETE: 5121 log_info("HCI_STATE_HALTING, calling sleep"); 5122 #ifdef HAVE_PLATFORM_IPHONE_OS 5123 // don't actually go to sleep, if H4 supports power management 5124 if (btstack_control_iphone_power_management_enabled()){ 5125 // SLEEP MODE reached 5126 hci_stack->state = HCI_STATE_SLEEPING; 5127 hci_emit_state(); 5128 break; 5129 } 5130 #endif 5131 // switch mode 5132 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5133 hci_emit_state(); 5134 break; 5135 5136 default: 5137 break; 5138 } 5139 break; 5140 5141 default: 5142 break; 5143 } 5144 } 5145 5146 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5147 // house-keeping 5148 5149 #ifdef ENABLE_CLASSIC 5150 bd_addr_t addr; 5151 hci_connection_t * conn; 5152 #endif 5153 #ifdef ENABLE_LE_CENTRAL 5154 uint8_t initiator_filter_policy; 5155 #endif 5156 5157 uint16_t opcode = little_endian_read_16(packet, 0); 5158 switch (opcode) { 5159 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5160 hci_stack->loopback_mode = packet[3]; 5161 break; 5162 5163 #ifdef ENABLE_CLASSIC 5164 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5165 reverse_bd_addr(&packet[3], addr); 5166 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5167 5168 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5169 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5170 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5171 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5172 } 5173 5174 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5175 if (!conn) { 5176 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5177 if (!conn) { 5178 // notify client that alloc failed 5179 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5180 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5181 } 5182 conn->state = SEND_CREATE_CONNECTION; 5183 conn->role = HCI_ROLE_MASTER; 5184 } 5185 5186 conn->con_handle = HCI_CON_HANDLE_INVALID; 5187 conn->role = HCI_ROLE_INVALID; 5188 5189 log_info("conn state %u", conn->state); 5190 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5191 switch (conn->state) { 5192 // if connection active exists 5193 case OPEN: 5194 // and OPEN, emit connection complete command 5195 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5196 // packet not sent to controller 5197 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5198 case RECEIVED_DISCONNECTION_COMPLETE: 5199 // create connection triggered in disconnect complete event, let's do it now 5200 break; 5201 case SEND_CREATE_CONNECTION: 5202 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5203 break; 5204 default: 5205 // otherwise, just ignore as it is already in the open process 5206 // packet not sent to controller 5207 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5208 } 5209 conn->state = SENT_CREATE_CONNECTION; 5210 5211 // track outgoing connection 5212 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5213 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5214 break; 5215 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5216 if (hci_stack->link_key_db) { 5217 reverse_bd_addr(&packet[3], addr); 5218 hci_stack->link_key_db->delete_link_key(addr); 5219 } 5220 break; 5221 5222 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5223 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5224 // setup_synchronous_connection? Voice setting at offset 22 5225 // TODO: compare to current setting if sco connection already active 5226 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5227 break; 5228 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5229 // accept_synchronus_connection? Voice setting at offset 18 5230 // TODO: compare to current setting if sco connection already active 5231 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5232 break; 5233 #endif 5234 #endif 5235 5236 #ifdef ENABLE_BLE 5237 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5238 hci_stack->le_random_address_set = 1; 5239 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5240 break; 5241 #ifdef ENABLE_LE_PERIPHERAL 5242 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5243 hci_stack->le_advertisements_active = packet[3] != 0; 5244 break; 5245 #endif 5246 #ifdef ENABLE_LE_CENTRAL 5247 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5248 // white list used? 5249 initiator_filter_policy = packet[7]; 5250 switch (initiator_filter_policy) { 5251 case 0: 5252 // whitelist not used 5253 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5254 break; 5255 case 1: 5256 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5257 break; 5258 default: 5259 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5260 break; 5261 } 5262 // track outgoing connection 5263 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5264 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5265 break; 5266 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5267 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5268 break; 5269 #endif 5270 #endif 5271 default: 5272 break; 5273 } 5274 5275 hci_stack->num_cmd_packets--; 5276 5277 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5278 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5279 if (err != 0){ 5280 return ERROR_CODE_HARDWARE_FAILURE; 5281 } 5282 return ERROR_CODE_SUCCESS; 5283 } 5284 5285 // disconnect because of security block 5286 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5287 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5288 if (!connection) return; 5289 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5290 } 5291 5292 5293 // Configure Secure Simple Pairing 5294 5295 #ifdef ENABLE_CLASSIC 5296 5297 // enable will enable SSP during init 5298 void gap_ssp_set_enable(int enable){ 5299 hci_stack->ssp_enable = enable; 5300 } 5301 5302 static int hci_local_ssp_activated(void){ 5303 return gap_ssp_supported() && hci_stack->ssp_enable; 5304 } 5305 5306 // if set, BTstack will respond to io capability request using authentication requirement 5307 void gap_ssp_set_io_capability(int io_capability){ 5308 hci_stack->ssp_io_capability = io_capability; 5309 } 5310 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5311 hci_stack->ssp_authentication_requirement = authentication_requirement; 5312 } 5313 5314 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5315 void gap_ssp_set_auto_accept(int auto_accept){ 5316 hci_stack->ssp_auto_accept = auto_accept; 5317 } 5318 5319 void gap_secure_connections_enable(bool enable){ 5320 hci_stack->secure_connections_enable = enable; 5321 } 5322 5323 #endif 5324 5325 // va_list part of hci_send_cmd 5326 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5327 if (!hci_can_send_command_packet_now()){ 5328 log_error("hci_send_cmd called but cannot send packet now"); 5329 return ERROR_CODE_COMMAND_DISALLOWED; 5330 } 5331 5332 // for HCI INITIALIZATION 5333 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5334 hci_stack->last_cmd_opcode = cmd->opcode; 5335 5336 hci_reserve_packet_buffer(); 5337 uint8_t * packet = hci_stack->hci_packet_buffer; 5338 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5339 uint8_t status = hci_send_cmd_packet(packet, size); 5340 5341 // release packet buffer on error or for synchronous transport implementations 5342 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5343 hci_release_packet_buffer(); 5344 hci_emit_transport_packet_sent(); 5345 } 5346 5347 return status; 5348 } 5349 5350 /** 5351 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5352 */ 5353 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5354 va_list argptr; 5355 va_start(argptr, cmd); 5356 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5357 va_end(argptr); 5358 return status; 5359 } 5360 5361 // Create various non-HCI events. 5362 // TODO: generalize, use table similar to hci_create_command 5363 5364 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5365 // dump packet 5366 if (dump) { 5367 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5368 } 5369 5370 // dispatch to all event handlers 5371 btstack_linked_list_iterator_t it; 5372 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5373 while (btstack_linked_list_iterator_has_next(&it)){ 5374 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5375 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5376 } 5377 } 5378 5379 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5380 if (!hci_stack->acl_packet_handler) return; 5381 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5382 } 5383 5384 #ifdef ENABLE_CLASSIC 5385 static void hci_notify_if_sco_can_send_now(void){ 5386 // notify SCO sender if waiting 5387 if (!hci_stack->sco_waiting_for_can_send_now) return; 5388 if (hci_can_send_sco_packet_now()){ 5389 hci_stack->sco_waiting_for_can_send_now = 0; 5390 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5391 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5392 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5393 } 5394 } 5395 5396 // parsing end emitting has been merged to reduce code size 5397 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5398 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5399 5400 uint8_t * eir_data; 5401 ad_context_t context; 5402 const uint8_t * name; 5403 uint8_t name_len; 5404 5405 if (size < 3) return; 5406 5407 int event_type = hci_event_packet_get_type(packet); 5408 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5409 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5410 5411 switch (event_type){ 5412 case HCI_EVENT_INQUIRY_RESULT: 5413 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5414 if (size != (3 + (num_responses * 14))) return; 5415 break; 5416 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5417 if (size != 257) return; 5418 if (num_responses != 1) return; 5419 break; 5420 default: 5421 return; 5422 } 5423 5424 // event[1] is set at the end 5425 int i; 5426 for (i=0; i<num_responses;i++){ 5427 memset(event, 0, sizeof(event)); 5428 event[0] = GAP_EVENT_INQUIRY_RESULT; 5429 uint8_t event_size = 27; // if name is not set by EIR 5430 5431 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5432 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5433 (void)memcpy(&event[9], 5434 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5435 3); // class of device 5436 (void)memcpy(&event[12], 5437 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5438 2); // clock offset 5439 5440 switch (event_type){ 5441 case HCI_EVENT_INQUIRY_RESULT: 5442 // 14,15,16,17 = 0, size 18 5443 break; 5444 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5445 event[14] = 1; 5446 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5447 // 16,17 = 0, size 18 5448 break; 5449 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5450 event[14] = 1; 5451 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5452 // EIR packets only contain a single inquiry response 5453 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5454 name = NULL; 5455 // Iterate over EIR data 5456 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5457 uint8_t data_type = ad_iterator_get_data_type(&context); 5458 uint8_t data_size = ad_iterator_get_data_len(&context); 5459 const uint8_t * data = ad_iterator_get_data(&context); 5460 // Prefer Complete Local Name over Shortened Local Name 5461 switch (data_type){ 5462 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5463 if (name) continue; 5464 /* fall through */ 5465 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5466 name = data; 5467 name_len = data_size; 5468 break; 5469 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5470 if (data_size != 8) break; 5471 event[16] = 1; 5472 memcpy(&event[17], data, 8); 5473 break; 5474 default: 5475 break; 5476 } 5477 } 5478 if (name){ 5479 event[25] = 1; 5480 // truncate name if needed 5481 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5482 event[26] = len; 5483 (void)memcpy(&event[27], name, len); 5484 event_size += len; 5485 } 5486 break; 5487 default: 5488 return; 5489 } 5490 event[1] = event_size - 2; 5491 hci_emit_event(event, event_size, 1); 5492 } 5493 } 5494 #endif 5495 5496 void hci_emit_state(void){ 5497 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5498 uint8_t event[3]; 5499 event[0] = BTSTACK_EVENT_STATE; 5500 event[1] = sizeof(event) - 2u; 5501 event[2] = hci_stack->state; 5502 hci_emit_event(event, sizeof(event), 1); 5503 } 5504 5505 #ifdef ENABLE_CLASSIC 5506 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5507 uint8_t event[13]; 5508 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5509 event[1] = sizeof(event) - 2; 5510 event[2] = status; 5511 little_endian_store_16(event, 3, con_handle); 5512 reverse_bd_addr(address, &event[5]); 5513 event[11] = 1; // ACL connection 5514 event[12] = 0; // encryption disabled 5515 hci_emit_event(event, sizeof(event), 1); 5516 } 5517 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5518 if (disable_l2cap_timeouts) return; 5519 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5520 uint8_t event[4]; 5521 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5522 event[1] = sizeof(event) - 2; 5523 little_endian_store_16(event, 2, conn->con_handle); 5524 hci_emit_event(event, sizeof(event), 1); 5525 } 5526 #endif 5527 5528 #ifdef ENABLE_BLE 5529 #ifdef ENABLE_LE_CENTRAL 5530 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){ 5531 uint8_t event[21]; 5532 event[0] = HCI_EVENT_LE_META; 5533 event[1] = sizeof(event) - 2u; 5534 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5535 event[3] = status; 5536 little_endian_store_16(event, 4, con_handle); 5537 event[6] = 0; // TODO: role 5538 event[7] = address_type; 5539 reverse_bd_addr(address, &event[8]); 5540 little_endian_store_16(event, 14, 0); // interval 5541 little_endian_store_16(event, 16, 0); // latency 5542 little_endian_store_16(event, 18, 0); // supervision timeout 5543 event[20] = 0; // master clock accuracy 5544 hci_emit_event(event, sizeof(event), 1); 5545 } 5546 #endif 5547 #endif 5548 5549 static void hci_emit_transport_packet_sent(void){ 5550 // notify upper stack that it might be possible to send again 5551 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5552 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5553 } 5554 5555 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5556 uint8_t event[6]; 5557 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5558 event[1] = sizeof(event) - 2u; 5559 event[2] = 0; // status = OK 5560 little_endian_store_16(event, 3, con_handle); 5561 event[5] = reason; 5562 hci_emit_event(event, sizeof(event), 1); 5563 } 5564 5565 static void hci_emit_nr_connections_changed(void){ 5566 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5567 uint8_t event[3]; 5568 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5569 event[1] = sizeof(event) - 2u; 5570 event[2] = nr_hci_connections(); 5571 hci_emit_event(event, sizeof(event), 1); 5572 } 5573 5574 static void hci_emit_hci_open_failed(void){ 5575 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5576 uint8_t event[2]; 5577 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5578 event[1] = sizeof(event) - 2u; 5579 hci_emit_event(event, sizeof(event), 1); 5580 } 5581 5582 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5583 log_info("hci_emit_dedicated_bonding_result %u ", status); 5584 uint8_t event[9]; 5585 int pos = 0; 5586 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5587 event[pos++] = sizeof(event) - 2u; 5588 event[pos++] = status; 5589 reverse_bd_addr(address, &event[pos]); 5590 hci_emit_event(event, sizeof(event), 1); 5591 } 5592 5593 5594 #ifdef ENABLE_CLASSIC 5595 5596 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5597 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5598 uint8_t event[5]; 5599 int pos = 0; 5600 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5601 event[pos++] = sizeof(event) - 2; 5602 little_endian_store_16(event, 2, con_handle); 5603 pos += 2; 5604 event[pos++] = level; 5605 hci_emit_event(event, sizeof(event), 1); 5606 } 5607 5608 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5609 if (!connection) return LEVEL_0; 5610 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5611 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5612 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5613 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5614 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5615 // LEVEL 4 always requires 128 bit encrytion key size 5616 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5617 security_level = LEVEL_3; 5618 } 5619 return security_level; 5620 } 5621 5622 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5623 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5624 uint8_t event[3]; 5625 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5626 event[1] = sizeof(event) - 2; 5627 event[2] = enabled; 5628 hci_emit_event(event, sizeof(event), 1); 5629 } 5630 5631 // query if remote side supports eSCO 5632 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5633 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5634 if (!connection) return false; 5635 return (connection->remote_supported_features[0] & 1) != 0; 5636 } 5637 5638 static bool hci_ssp_supported(hci_connection_t * connection){ 5639 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5640 return (connection->bonding_flags & mask) == mask; 5641 } 5642 5643 // query if remote side supports SSP 5644 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5646 if (!connection) return false; 5647 return hci_ssp_supported(connection) ? 1 : 0; 5648 } 5649 5650 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5651 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5652 } 5653 5654 // GAP API 5655 /** 5656 * @bbrief enable/disable bonding. default is enabled 5657 * @praram enabled 5658 */ 5659 void gap_set_bondable_mode(int enable){ 5660 hci_stack->bondable = enable ? 1 : 0; 5661 } 5662 /** 5663 * @brief Get bondable mode. 5664 * @return 1 if bondable 5665 */ 5666 int gap_get_bondable_mode(void){ 5667 return hci_stack->bondable; 5668 } 5669 5670 /** 5671 * @brief map link keys to security levels 5672 */ 5673 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5674 switch (link_key_type){ 5675 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5676 return LEVEL_4; 5677 case COMBINATION_KEY: 5678 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5679 return LEVEL_3; 5680 default: 5681 return LEVEL_2; 5682 } 5683 } 5684 5685 /** 5686 * @brief map link keys to secure connection yes/no 5687 */ 5688 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5689 switch (link_key_type){ 5690 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5691 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5692 return 1; 5693 default: 5694 return 0; 5695 } 5696 } 5697 5698 /** 5699 * @brief map link keys to authenticated 5700 */ 5701 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5702 switch (link_key_type){ 5703 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5704 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5705 return 1; 5706 default: 5707 return 0; 5708 } 5709 } 5710 5711 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5712 log_info("gap_mitm_protection_required_for_security_level %u", level); 5713 return level > LEVEL_2; 5714 } 5715 5716 /** 5717 * @brief get current security level 5718 */ 5719 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5720 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5721 if (!connection) return LEVEL_0; 5722 return gap_security_level_for_connection(connection); 5723 } 5724 5725 /** 5726 * @brief request connection to device to 5727 * @result GAP_AUTHENTICATION_RESULT 5728 */ 5729 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5730 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5731 if (!connection){ 5732 hci_emit_security_level(con_handle, LEVEL_0); 5733 return; 5734 } 5735 5736 btstack_assert(hci_is_le_connection(connection) == false); 5737 5738 // 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) 5739 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5740 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5741 requested_level = LEVEL_4; 5742 } 5743 5744 gap_security_level_t current_level = gap_security_level(con_handle); 5745 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5746 requested_level, connection->requested_security_level, current_level); 5747 5748 // authentication active if authentication request was sent or planned level > 0 5749 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5750 if (authentication_active){ 5751 // authentication already active 5752 if (connection->requested_security_level < requested_level){ 5753 // increase requested level as new level is higher 5754 // TODO: handle re-authentication when done 5755 connection->requested_security_level = requested_level; 5756 } 5757 } else { 5758 // no request active, notify if security sufficient 5759 if (requested_level <= current_level){ 5760 hci_emit_security_level(con_handle, current_level); 5761 return; 5762 } 5763 5764 // store request 5765 connection->requested_security_level = requested_level; 5766 5767 // start to authenticate connection 5768 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5769 hci_run(); 5770 } 5771 } 5772 5773 /** 5774 * @brief start dedicated bonding with device. disconnect after bonding 5775 * @param device 5776 * @param request MITM protection 5777 * @result GAP_DEDICATED_BONDING_COMPLETE 5778 */ 5779 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5780 5781 // create connection state machine 5782 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5783 5784 if (!connection){ 5785 return BTSTACK_MEMORY_ALLOC_FAILED; 5786 } 5787 5788 // delete linkn key 5789 gap_drop_link_key_for_bd_addr(device); 5790 5791 // configure LEVEL_2/3, dedicated bonding 5792 connection->state = SEND_CREATE_CONNECTION; 5793 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5794 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5795 connection->bonding_flags = BONDING_DEDICATED; 5796 5797 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5798 5799 // handle: connnection failure (connection complete != ok) 5800 // handle: authentication failure 5801 // handle: disconnect on done 5802 5803 hci_run(); 5804 5805 return 0; 5806 } 5807 5808 void gap_set_local_name(const char * local_name){ 5809 hci_stack->local_name = local_name; 5810 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5811 // also update EIR if not set by user 5812 if (hci_stack->eir_data == NULL){ 5813 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5814 } 5815 hci_run(); 5816 } 5817 #endif 5818 5819 5820 #ifdef ENABLE_BLE 5821 5822 #ifdef ENABLE_LE_CENTRAL 5823 void gap_start_scan(void){ 5824 hci_stack->le_scanning_enabled = true; 5825 hci_run(); 5826 } 5827 5828 void gap_stop_scan(void){ 5829 hci_stack->le_scanning_enabled = false; 5830 hci_run(); 5831 } 5832 5833 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5834 hci_stack->le_scan_type = scan_type; 5835 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5836 hci_stack->le_scan_interval = scan_interval; 5837 hci_stack->le_scan_window = scan_window; 5838 hci_stack->le_scanning_param_update = true; 5839 hci_run(); 5840 } 5841 5842 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5843 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5844 } 5845 5846 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5847 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5848 if (!conn){ 5849 // disallow if le connection is already outgoing 5850 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5851 log_error("le connection already active"); 5852 return ERROR_CODE_COMMAND_DISALLOWED; 5853 } 5854 5855 log_info("gap_connect: no connection exists yet, creating context"); 5856 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5857 if (!conn){ 5858 // notify client that alloc failed 5859 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5860 log_info("gap_connect: failed to alloc hci_connection_t"); 5861 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5862 } 5863 5864 // set le connecting state 5865 if (hci_is_le_connection_type(addr_type)){ 5866 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5867 } 5868 5869 conn->state = SEND_CREATE_CONNECTION; 5870 log_info("gap_connect: send create connection next"); 5871 hci_run(); 5872 return ERROR_CODE_SUCCESS; 5873 } 5874 5875 if (!hci_is_le_connection(conn) || 5876 (conn->state == SEND_CREATE_CONNECTION) || 5877 (conn->state == SENT_CREATE_CONNECTION)) { 5878 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5879 log_error("gap_connect: classic connection or connect is already being created"); 5880 return GATT_CLIENT_IN_WRONG_STATE; 5881 } 5882 5883 // check if connection was just disconnected 5884 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5885 log_info("gap_connect: send create connection (again)"); 5886 conn->state = SEND_CREATE_CONNECTION; 5887 hci_run(); 5888 return ERROR_CODE_SUCCESS; 5889 } 5890 5891 log_info("gap_connect: context exists with state %u", conn->state); 5892 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5893 hci_run(); 5894 return ERROR_CODE_SUCCESS; 5895 } 5896 5897 // @assumption: only a single outgoing LE Connection exists 5898 static hci_connection_t * gap_get_outgoing_connection(void){ 5899 btstack_linked_item_t *it; 5900 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5901 hci_connection_t * conn = (hci_connection_t *) it; 5902 if (!hci_is_le_connection(conn)) continue; 5903 switch (conn->state){ 5904 case SEND_CREATE_CONNECTION: 5905 case SENT_CREATE_CONNECTION: 5906 case SENT_CANCEL_CONNECTION: 5907 return conn; 5908 default: 5909 break; 5910 }; 5911 } 5912 return NULL; 5913 } 5914 5915 uint8_t gap_connect_cancel(void){ 5916 hci_connection_t * conn = gap_get_outgoing_connection(); 5917 if (!conn) return 0; 5918 switch (conn->state){ 5919 case SEND_CREATE_CONNECTION: 5920 // skip sending create connection and emit event instead 5921 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5922 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5923 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5924 btstack_memory_hci_connection_free( conn ); 5925 break; 5926 case SENT_CREATE_CONNECTION: 5927 // request to send cancel connection 5928 conn->state = SEND_CANCEL_CONNECTION; 5929 hci_run(); 5930 break; 5931 default: 5932 break; 5933 } 5934 return 0; 5935 } 5936 #endif 5937 5938 #ifdef ENABLE_LE_CENTRAL 5939 /** 5940 * @brief Set connection parameters for outgoing connections 5941 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5942 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5943 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5944 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5945 * @param conn_latency, default: 4 5946 * @param supervision_timeout (unit: 10ms), default: 720 ms 5947 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5948 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5949 */ 5950 5951 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5952 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5953 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5954 hci_stack->le_connection_scan_interval = conn_scan_interval; 5955 hci_stack->le_connection_scan_window = conn_scan_window; 5956 hci_stack->le_connection_interval_min = conn_interval_min; 5957 hci_stack->le_connection_interval_max = conn_interval_max; 5958 hci_stack->le_connection_latency = conn_latency; 5959 hci_stack->le_supervision_timeout = supervision_timeout; 5960 hci_stack->le_minimum_ce_length = min_ce_length; 5961 hci_stack->le_maximum_ce_length = max_ce_length; 5962 } 5963 #endif 5964 5965 /** 5966 * @brief Updates the connection parameters for a given LE connection 5967 * @param handle 5968 * @param conn_interval_min (unit: 1.25ms) 5969 * @param conn_interval_max (unit: 1.25ms) 5970 * @param conn_latency 5971 * @param supervision_timeout (unit: 10ms) 5972 * @returns 0 if ok 5973 */ 5974 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5975 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5976 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5977 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5978 connection->le_conn_interval_min = conn_interval_min; 5979 connection->le_conn_interval_max = conn_interval_max; 5980 connection->le_conn_latency = conn_latency; 5981 connection->le_supervision_timeout = supervision_timeout; 5982 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5983 hci_run(); 5984 return 0; 5985 } 5986 5987 /** 5988 * @brief Request an update of the connection parameter for a given LE connection 5989 * @param handle 5990 * @param conn_interval_min (unit: 1.25ms) 5991 * @param conn_interval_max (unit: 1.25ms) 5992 * @param conn_latency 5993 * @param supervision_timeout (unit: 10ms) 5994 * @returns 0 if ok 5995 */ 5996 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5997 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5998 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5999 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6000 connection->le_conn_interval_min = conn_interval_min; 6001 connection->le_conn_interval_max = conn_interval_max; 6002 connection->le_conn_latency = conn_latency; 6003 connection->le_supervision_timeout = supervision_timeout; 6004 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6005 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6006 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6007 return 0; 6008 } 6009 6010 #ifdef ENABLE_LE_PERIPHERAL 6011 6012 /** 6013 * @brief Set Advertisement Data 6014 * @param advertising_data_length 6015 * @param advertising_data (max 31 octets) 6016 * @note data is not copied, pointer has to stay valid 6017 */ 6018 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6019 hci_stack->le_advertisements_data_len = advertising_data_length; 6020 hci_stack->le_advertisements_data = advertising_data; 6021 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6022 hci_run(); 6023 } 6024 6025 /** 6026 * @brief Set Scan Response Data 6027 * @param advertising_data_length 6028 * @param advertising_data (max 31 octets) 6029 * @note data is not copied, pointer has to stay valid 6030 */ 6031 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6032 hci_stack->le_scan_response_data_len = scan_response_data_length; 6033 hci_stack->le_scan_response_data = scan_response_data; 6034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6035 hci_run(); 6036 } 6037 6038 /** 6039 * @brief Set Advertisement Parameters 6040 * @param adv_int_min 6041 * @param adv_int_max 6042 * @param adv_type 6043 * @param direct_address_type 6044 * @param direct_address 6045 * @param channel_map 6046 * @param filter_policy 6047 * 6048 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6049 */ 6050 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6051 uint8_t direct_address_typ, bd_addr_t direct_address, 6052 uint8_t channel_map, uint8_t filter_policy) { 6053 6054 hci_stack->le_advertisements_interval_min = adv_int_min; 6055 hci_stack->le_advertisements_interval_max = adv_int_max; 6056 hci_stack->le_advertisements_type = adv_type; 6057 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6058 hci_stack->le_advertisements_channel_map = channel_map; 6059 hci_stack->le_advertisements_filter_policy = filter_policy; 6060 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6061 6); 6062 6063 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6064 hci_run(); 6065 } 6066 6067 /** 6068 * @brief Enable/Disable Advertisements 6069 * @param enabled 6070 */ 6071 void gap_advertisements_enable(int enabled){ 6072 hci_stack->le_advertisements_enabled = enabled != 0; 6073 hci_update_advertisements_enabled_for_current_roles(); 6074 hci_run(); 6075 } 6076 6077 #endif 6078 6079 void hci_le_set_own_address_type(uint8_t own_address_type){ 6080 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6081 if (own_address_type == hci_stack->le_own_addr_type) return; 6082 hci_stack->le_own_addr_type = own_address_type; 6083 6084 #ifdef ENABLE_LE_PERIPHERAL 6085 // update advertisement parameters, too 6086 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6087 hci_run(); 6088 #endif 6089 #ifdef ENABLE_LE_CENTRAL 6090 // note: we don't update scan parameters or modify ongoing connection attempts 6091 #endif 6092 } 6093 6094 #endif 6095 6096 uint8_t gap_disconnect(hci_con_handle_t handle){ 6097 hci_connection_t * conn = hci_connection_for_handle(handle); 6098 if (!conn){ 6099 hci_emit_disconnection_complete(handle, 0); 6100 return 0; 6101 } 6102 // ignore if already disconnected 6103 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6104 return 0; 6105 } 6106 conn->state = SEND_DISCONNECT; 6107 hci_run(); 6108 return 0; 6109 } 6110 6111 int gap_read_rssi(hci_con_handle_t con_handle){ 6112 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6113 if (hci_connection == NULL) return 0; 6114 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6115 hci_run(); 6116 return 1; 6117 } 6118 6119 /** 6120 * @brief Get connection type 6121 * @param con_handle 6122 * @result connection_type 6123 */ 6124 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6125 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6126 if (!conn) return GAP_CONNECTION_INVALID; 6127 switch (conn->address_type){ 6128 case BD_ADDR_TYPE_LE_PUBLIC: 6129 case BD_ADDR_TYPE_LE_RANDOM: 6130 return GAP_CONNECTION_LE; 6131 case BD_ADDR_TYPE_SCO: 6132 return GAP_CONNECTION_SCO; 6133 case BD_ADDR_TYPE_ACL: 6134 return GAP_CONNECTION_ACL; 6135 default: 6136 return GAP_CONNECTION_INVALID; 6137 } 6138 } 6139 6140 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6141 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6142 if (!conn) return HCI_ROLE_INVALID; 6143 return (hci_role_t) conn->role; 6144 } 6145 6146 6147 #ifdef ENABLE_CLASSIC 6148 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6149 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6150 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6151 conn->request_role = role; 6152 hci_run(); 6153 return ERROR_CODE_SUCCESS; 6154 } 6155 #endif 6156 6157 #ifdef ENABLE_BLE 6158 6159 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){ 6160 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6161 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6162 6163 conn->le_phy_update_all_phys = all_phys; 6164 conn->le_phy_update_tx_phys = tx_phys; 6165 conn->le_phy_update_rx_phys = rx_phys; 6166 conn->le_phy_update_phy_options = phy_options; 6167 6168 hci_run(); 6169 6170 return 0; 6171 } 6172 6173 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6174 // check if already in list 6175 btstack_linked_list_iterator_t it; 6176 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6177 while (btstack_linked_list_iterator_has_next(&it)) { 6178 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6179 if (entry->address_type != address_type) { 6180 continue; 6181 } 6182 if (memcmp(entry->address, address, 6) != 0) { 6183 continue; 6184 } 6185 // disallow if already scheduled to add 6186 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6187 return ERROR_CODE_COMMAND_DISALLOWED; 6188 } 6189 // still on controller, but scheduled to remove -> re-add 6190 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6191 return ERROR_CODE_SUCCESS; 6192 } 6193 // alloc and add to list 6194 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6195 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6196 entry->address_type = address_type; 6197 (void)memcpy(entry->address, address, 6); 6198 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6199 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6200 return ERROR_CODE_SUCCESS; 6201 } 6202 6203 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6204 btstack_linked_list_iterator_t it; 6205 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6206 while (btstack_linked_list_iterator_has_next(&it)){ 6207 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6208 if (entry->address_type != address_type) { 6209 continue; 6210 } 6211 if (memcmp(entry->address, address, 6) != 0) { 6212 continue; 6213 } 6214 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6215 // remove from controller if already present 6216 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6217 } else { 6218 // directly remove entry from whitelist 6219 btstack_linked_list_iterator_remove(&it); 6220 btstack_memory_whitelist_entry_free(entry); 6221 } 6222 return ERROR_CODE_SUCCESS; 6223 } 6224 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6225 } 6226 6227 static void hci_whitelist_clear(void){ 6228 btstack_linked_list_iterator_t it; 6229 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6230 while (btstack_linked_list_iterator_has_next(&it)){ 6231 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6232 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6233 // remove from controller if already present 6234 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6235 continue; 6236 } 6237 // directly remove entry from whitelist 6238 btstack_linked_list_iterator_remove(&it); 6239 btstack_memory_whitelist_entry_free(entry); 6240 } 6241 } 6242 6243 /** 6244 * @brief Clear Whitelist 6245 * @returns 0 if ok 6246 */ 6247 uint8_t gap_whitelist_clear(void){ 6248 hci_whitelist_clear(); 6249 hci_run(); 6250 return ERROR_CODE_SUCCESS; 6251 } 6252 6253 /** 6254 * @brief Add Device to Whitelist 6255 * @param address_typ 6256 * @param address 6257 * @returns 0 if ok 6258 */ 6259 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6260 uint8_t status = hci_whitelist_add(address_type, address); 6261 if (status){ 6262 return status; 6263 } 6264 hci_run(); 6265 return ERROR_CODE_SUCCESS; 6266 } 6267 6268 /** 6269 * @brief Remove Device from Whitelist 6270 * @param address_typ 6271 * @param address 6272 * @returns 0 if ok 6273 */ 6274 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6275 uint8_t status = hci_whitelist_remove(address_type, address); 6276 if (status){ 6277 return status; 6278 } 6279 hci_run(); 6280 return ERROR_CODE_SUCCESS; 6281 } 6282 6283 #ifdef ENABLE_LE_CENTRAL 6284 /** 6285 * @brief Connect with Whitelist 6286 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6287 * @returns - if ok 6288 */ 6289 uint8_t gap_connect_with_whitelist(void){ 6290 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6291 return ERROR_CODE_COMMAND_DISALLOWED; 6292 } 6293 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6294 hci_run(); 6295 return ERROR_CODE_SUCCESS; 6296 } 6297 6298 /** 6299 * @brief Auto Connection Establishment - Start Connecting to device 6300 * @param address_typ 6301 * @param address 6302 * @returns 0 if ok 6303 */ 6304 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6305 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6306 return ERROR_CODE_COMMAND_DISALLOWED; 6307 } 6308 6309 uint8_t status = hci_whitelist_add(address_type, address); 6310 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6311 return status; 6312 } 6313 6314 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6315 6316 hci_run(); 6317 return ERROR_CODE_SUCCESS; 6318 } 6319 6320 /** 6321 * @brief Auto Connection Establishment - Stop Connecting to device 6322 * @param address_typ 6323 * @param address 6324 * @returns 0 if ok 6325 */ 6326 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6327 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6328 return ERROR_CODE_COMMAND_DISALLOWED; 6329 } 6330 6331 hci_whitelist_remove(address_type, address); 6332 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6333 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6334 } 6335 hci_run(); 6336 return 0; 6337 } 6338 6339 /** 6340 * @brief Auto Connection Establishment - Stop everything 6341 * @note Convenience function to stop all active auto connection attempts 6342 */ 6343 uint8_t gap_auto_connection_stop_all(void){ 6344 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6345 return ERROR_CODE_COMMAND_DISALLOWED; 6346 } 6347 hci_whitelist_clear(); 6348 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6349 hci_run(); 6350 return ERROR_CODE_SUCCESS; 6351 } 6352 6353 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6354 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6355 if (!conn) return 0; 6356 return conn->le_connection_interval; 6357 } 6358 #endif 6359 #endif 6360 6361 #ifdef ENABLE_CLASSIC 6362 /** 6363 * @brief Set Extended Inquiry Response data 6364 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6365 * @note has to be done before stack starts up 6366 */ 6367 void gap_set_extended_inquiry_response(const uint8_t * data){ 6368 hci_stack->eir_data = data; 6369 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6370 hci_run(); 6371 } 6372 6373 /** 6374 * @brief Start GAP Classic Inquiry 6375 * @param duration in 1.28s units 6376 * @return 0 if ok 6377 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6378 */ 6379 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6380 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6381 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6382 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6383 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6384 } 6385 hci_stack->inquiry_state = duration_in_1280ms_units; 6386 hci_run(); 6387 return 0; 6388 } 6389 6390 /** 6391 * @brief Stop GAP Classic Inquiry 6392 * @returns 0 if ok 6393 */ 6394 int gap_inquiry_stop(void){ 6395 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6396 // emit inquiry complete event, before it even started 6397 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6398 hci_emit_event(event, sizeof(event), 1); 6399 return 0; 6400 } 6401 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6402 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6403 hci_run(); 6404 return 0; 6405 } 6406 6407 void gap_inquiry_set_lap(uint32_t lap){ 6408 hci_stack->inquiry_lap = lap; 6409 } 6410 6411 6412 /** 6413 * @brief Remote Name Request 6414 * @param addr 6415 * @param page_scan_repetition_mode 6416 * @param clock_offset only used when bit 15 is set 6417 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6418 */ 6419 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6420 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6421 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6422 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6423 hci_stack->remote_name_clock_offset = clock_offset; 6424 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6425 hci_run(); 6426 return 0; 6427 } 6428 6429 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6430 hci_stack->gap_pairing_state = state; 6431 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6432 hci_run(); 6433 return 0; 6434 } 6435 6436 /** 6437 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6438 * @param addr 6439 * @param pin_data 6440 * @param pin_len 6441 * @return 0 if ok 6442 */ 6443 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6444 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6445 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6446 hci_stack->gap_pairing_pin_len = pin_len; 6447 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6448 } 6449 6450 /** 6451 * @brief Legacy Pairing Pin Code Response 6452 * @param addr 6453 * @param pin 6454 * @return 0 if ok 6455 */ 6456 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6457 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6458 } 6459 6460 /** 6461 * @brief Abort Legacy Pairing 6462 * @param addr 6463 * @param pin 6464 * @return 0 if ok 6465 */ 6466 int gap_pin_code_negative(bd_addr_t addr){ 6467 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6468 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6469 } 6470 6471 /** 6472 * @brief SSP Passkey Response 6473 * @param addr 6474 * @param passkey 6475 * @return 0 if ok 6476 */ 6477 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6478 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6479 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6480 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6481 } 6482 6483 /** 6484 * @brief Abort SSP Passkey Entry/Pairing 6485 * @param addr 6486 * @param pin 6487 * @return 0 if ok 6488 */ 6489 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6490 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6491 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6492 } 6493 6494 /** 6495 * @brief Accept SSP Numeric Comparison 6496 * @param addr 6497 * @param passkey 6498 * @return 0 if ok 6499 */ 6500 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6501 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6502 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6503 } 6504 6505 /** 6506 * @brief Abort SSP Numeric Comparison/Pairing 6507 * @param addr 6508 * @param pin 6509 * @return 0 if ok 6510 */ 6511 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6512 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6513 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6514 } 6515 6516 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6517 6518 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6519 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6520 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6521 connectionSetAuthenticationFlags(conn, flag); 6522 hci_run(); 6523 return ERROR_CODE_SUCCESS; 6524 } 6525 6526 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6527 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6528 } 6529 6530 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6531 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6532 } 6533 #endif 6534 6535 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6536 /** 6537 * @brief Report Remote OOB Data 6538 * @param bd_addr 6539 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6540 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6541 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6542 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6543 */ 6544 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){ 6545 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6546 if (connection == NULL) { 6547 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6548 } 6549 connection->classic_oob_c_192 = c_192; 6550 connection->classic_oob_r_192 = r_192; 6551 6552 // ignore P-256 if not supported by us 6553 if (hci_stack->secure_connections_active){ 6554 connection->classic_oob_c_256 = c_256; 6555 connection->classic_oob_r_256 = r_256; 6556 } 6557 6558 return ERROR_CODE_SUCCESS; 6559 } 6560 /** 6561 * @brief Generate new OOB data 6562 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6563 */ 6564 void gap_ssp_generate_oob_data(void){ 6565 hci_stack->classic_read_local_oob_data = true; 6566 hci_run(); 6567 } 6568 6569 #endif 6570 6571 /** 6572 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6573 * @param inquiry_mode see bluetooth_defines.h 6574 */ 6575 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6576 hci_stack->inquiry_mode = inquiry_mode; 6577 } 6578 6579 /** 6580 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6581 */ 6582 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6583 hci_stack->sco_voice_setting = voice_setting; 6584 } 6585 6586 /** 6587 * @brief Get SCO Voice Setting 6588 * @return current voice setting 6589 */ 6590 uint16_t hci_get_sco_voice_setting(void){ 6591 return hci_stack->sco_voice_setting; 6592 } 6593 6594 static int hci_have_usb_transport(void){ 6595 if (!hci_stack->hci_transport) return 0; 6596 const char * transport_name = hci_stack->hci_transport->name; 6597 if (!transport_name) return 0; 6598 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6599 } 6600 6601 /** @brief Get SCO packet length for current SCO Voice setting 6602 * @note Using SCO packets of the exact length is required for USB transfer 6603 * @return Length of SCO packets in bytes (not audio frames) 6604 */ 6605 uint16_t hci_get_sco_packet_length(void){ 6606 uint16_t sco_packet_length = 0; 6607 6608 #ifdef ENABLE_SCO_OVER_HCI 6609 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6610 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6611 6612 if (hci_have_usb_transport()){ 6613 // see Core Spec for H2 USB Transfer. 6614 // 3 byte SCO header + 24 bytes per connection 6615 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6616 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6617 } else { 6618 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6619 sco_packet_length = 3 + 60 * multiplier; 6620 // assert that it still fits inside an SCO buffer 6621 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6622 sco_packet_length = 3 + 60; 6623 } 6624 } 6625 #endif 6626 6627 #ifdef HAVE_SCO_TRANSPORT 6628 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6629 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6630 sco_packet_length = 3 + 60 * multiplier; 6631 #endif 6632 return sco_packet_length; 6633 } 6634 6635 /** 6636 * @brief Sets the master/slave policy 6637 * @param policy (0: attempt to become master, 1: let connecting device decide) 6638 */ 6639 void hci_set_master_slave_policy(uint8_t policy){ 6640 hci_stack->master_slave_policy = policy; 6641 } 6642 6643 #endif 6644 6645 HCI_STATE hci_get_state(void){ 6646 return hci_stack->state; 6647 } 6648 6649 #ifdef ENABLE_CLASSIC 6650 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6651 hci_stack->gap_classic_accept_callback = accept_callback; 6652 } 6653 #endif 6654 6655 /** 6656 * @brief Set callback for Bluetooth Hardware Error 6657 */ 6658 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6659 hci_stack->hardware_error_callback = fn; 6660 } 6661 6662 void hci_disconnect_all(void){ 6663 btstack_linked_list_iterator_t it; 6664 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6665 while (btstack_linked_list_iterator_has_next(&it)){ 6666 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6667 if (con->state == SENT_DISCONNECT) continue; 6668 con->state = SEND_DISCONNECT; 6669 } 6670 hci_run(); 6671 } 6672 6673 uint16_t hci_get_manufacturer(void){ 6674 return hci_stack->manufacturer; 6675 } 6676 6677 #ifdef ENABLE_BLE 6678 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6679 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6680 if (!hci_con) return NULL; 6681 return &hci_con->sm_connection; 6682 } 6683 6684 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6685 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6686 #endif 6687 6688 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6689 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6690 if (hci_connection == NULL) return 0; 6691 if (hci_is_le_connection(hci_connection)){ 6692 #ifdef ENABLE_BLE 6693 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6694 if (sm_conn->sm_connection_encrypted) { 6695 return sm_conn->sm_actual_encryption_key_size; 6696 } 6697 #endif 6698 } else { 6699 #ifdef ENABLE_CLASSIC 6700 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6701 return hci_connection->encryption_key_size; 6702 } 6703 #endif 6704 } 6705 return 0; 6706 } 6707 6708 int gap_authenticated(hci_con_handle_t con_handle){ 6709 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6710 if (hci_connection == NULL) return 0; 6711 6712 switch (hci_connection->address_type){ 6713 #ifdef ENABLE_BLE 6714 case BD_ADDR_TYPE_LE_PUBLIC: 6715 case BD_ADDR_TYPE_LE_RANDOM: 6716 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6717 return hci_connection->sm_connection.sm_connection_authenticated; 6718 #endif 6719 #ifdef ENABLE_CLASSIC 6720 case BD_ADDR_TYPE_SCO: 6721 case BD_ADDR_TYPE_ACL: 6722 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6723 #endif 6724 default: 6725 return 0; 6726 } 6727 } 6728 6729 int gap_secure_connection(hci_con_handle_t con_handle){ 6730 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6731 if (hci_connection == NULL) return 0; 6732 6733 switch (hci_connection->address_type){ 6734 #ifdef ENABLE_BLE 6735 case BD_ADDR_TYPE_LE_PUBLIC: 6736 case BD_ADDR_TYPE_LE_RANDOM: 6737 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6738 return hci_connection->sm_connection.sm_connection_sc; 6739 #endif 6740 #ifdef ENABLE_CLASSIC 6741 case BD_ADDR_TYPE_SCO: 6742 case BD_ADDR_TYPE_ACL: 6743 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6744 #endif 6745 default: 6746 return 0; 6747 } 6748 } 6749 6750 bool gap_bonded(hci_con_handle_t con_handle){ 6751 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6752 if (hci_connection == NULL) return 0; 6753 6754 #ifdef ENABLE_CLASSIC 6755 link_key_t link_key; 6756 link_key_type_t link_key_type; 6757 #endif 6758 switch (hci_connection->address_type){ 6759 #ifdef ENABLE_BLE 6760 case BD_ADDR_TYPE_LE_PUBLIC: 6761 case BD_ADDR_TYPE_LE_RANDOM: 6762 return hci_connection->sm_connection.sm_le_db_index >= 0; 6763 #endif 6764 #ifdef ENABLE_CLASSIC 6765 case BD_ADDR_TYPE_SCO: 6766 case BD_ADDR_TYPE_ACL: 6767 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6768 #endif 6769 default: 6770 return false; 6771 } 6772 } 6773 6774 #ifdef ENABLE_BLE 6775 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6776 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6777 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6778 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6779 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6780 return sm_conn->sm_connection_authorization_state; 6781 } 6782 #endif 6783 6784 #ifdef ENABLE_CLASSIC 6785 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){ 6786 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6787 if (!conn) return GAP_CONNECTION_INVALID; 6788 conn->sniff_min_interval = sniff_min_interval; 6789 conn->sniff_max_interval = sniff_max_interval; 6790 conn->sniff_attempt = sniff_attempt; 6791 conn->sniff_timeout = sniff_timeout; 6792 hci_run(); 6793 return 0; 6794 } 6795 6796 /** 6797 * @brief Exit Sniff mode 6798 * @param con_handle 6799 @ @return 0 if ok 6800 */ 6801 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6802 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6803 if (!conn) return GAP_CONNECTION_INVALID; 6804 conn->sniff_min_interval = 0xffff; 6805 hci_run(); 6806 return 0; 6807 } 6808 6809 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){ 6810 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6811 if (!conn) return GAP_CONNECTION_INVALID; 6812 conn->sniff_subrating_max_latency = max_latency; 6813 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6814 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6815 hci_run(); 6816 return ERROR_CODE_SUCCESS; 6817 } 6818 6819 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){ 6820 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6821 if (!conn) return GAP_CONNECTION_INVALID; 6822 conn->qos_service_type = service_type; 6823 conn->qos_token_rate = token_rate; 6824 conn->qos_peak_bandwidth = peak_bandwidth; 6825 conn->qos_latency = latency; 6826 conn->qos_delay_variation = delay_variation; 6827 hci_run(); 6828 return ERROR_CODE_SUCCESS; 6829 } 6830 6831 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6832 hci_stack->new_page_scan_interval = page_scan_interval; 6833 hci_stack->new_page_scan_window = page_scan_window; 6834 hci_run(); 6835 } 6836 6837 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6838 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6839 hci_run(); 6840 } 6841 6842 #endif 6843 6844 void hci_halting_defer(void){ 6845 if (hci_stack->state != HCI_STATE_HALTING) return; 6846 switch (hci_stack->substate){ 6847 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6848 case HCI_HALTING_CLOSE: 6849 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6850 break; 6851 default: 6852 break; 6853 } 6854 } 6855 6856 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6857 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6858 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6859 if (le_device_db_index >= le_device_db_max_count()) return; 6860 uint8_t offset = le_device_db_index >> 3; 6861 uint8_t mask = 1 << (le_device_db_index & 7); 6862 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6863 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6864 // note: go back to remove entries, otherwise, a remove + add will skip the add 6865 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6866 } 6867 } 6868 6869 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6870 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6871 if (le_device_db_index >= le_device_db_max_count()) return; 6872 uint8_t offset = le_device_db_index >> 3; 6873 uint8_t mask = 1 << (le_device_db_index & 7); 6874 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6875 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6876 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6877 } 6878 } 6879 6880 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6881 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6882 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6883 } 6884 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6885 // restart le resolving list update 6886 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6887 } 6888 return ERROR_CODE_SUCCESS; 6889 } 6890 #endif 6891 6892 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6893 void hci_setup_test_connections_fuzz(void){ 6894 hci_connection_t * conn; 6895 6896 // default address: 66:55:44:33:00:01 6897 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6898 6899 // setup Controller info 6900 hci_stack->num_cmd_packets = 255; 6901 hci_stack->acl_packets_total_num = 255; 6902 6903 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6904 addr[5] = 0x01; 6905 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6906 conn->con_handle = addr[5]; 6907 conn->role = HCI_ROLE_SLAVE; 6908 conn->state = RECEIVED_CONNECTION_REQUEST; 6909 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6910 6911 // setup incoming Classic SCO connection with con handle 0x0002 6912 addr[5] = 0x02; 6913 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6914 conn->con_handle = addr[5]; 6915 conn->role = HCI_ROLE_SLAVE; 6916 conn->state = RECEIVED_CONNECTION_REQUEST; 6917 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6918 6919 // setup ready Classic ACL connection with con handle 0x0003 6920 addr[5] = 0x03; 6921 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6922 conn->con_handle = addr[5]; 6923 conn->role = HCI_ROLE_SLAVE; 6924 conn->state = OPEN; 6925 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6926 6927 // setup ready Classic SCO connection with con handle 0x0004 6928 addr[5] = 0x04; 6929 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6930 conn->con_handle = addr[5]; 6931 conn->role = HCI_ROLE_SLAVE; 6932 conn->state = OPEN; 6933 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6934 6935 // setup ready LE ACL connection with con handle 0x005 and public address 6936 addr[5] = 0x05; 6937 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6938 conn->con_handle = addr[5]; 6939 conn->role = HCI_ROLE_SLAVE; 6940 conn->state = OPEN; 6941 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6942 conn->sm_connection.sm_connection_encrypted = 1; 6943 } 6944 6945 void hci_free_connections_fuzz(void){ 6946 btstack_linked_list_iterator_t it; 6947 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6948 while (btstack_linked_list_iterator_has_next(&it)){ 6949 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6950 btstack_linked_list_iterator_remove(&it); 6951 btstack_memory_hci_connection_free(con); 6952 } 6953 } 6954 void hci_simulate_working_fuzz(void){ 6955 hci_init_done(); 6956 hci_stack->num_cmd_packets = 255; 6957 } 6958 #endif 6959