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 3074 // emit dedicatd bonding event 3075 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3076 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3077 } 3078 3079 // mark connection for shutdown, stop timers, reset state 3080 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3081 hci_connection_stop_timer(conn); 3082 hci_connection_init(conn); 3083 3084 #ifdef ENABLE_BLE 3085 #ifdef ENABLE_LE_PERIPHERAL 3086 // re-enable advertisements for le connections if active 3087 if (hci_is_le_connection(conn)){ 3088 hci_update_advertisements_enabled_for_current_roles(); 3089 } 3090 #endif 3091 #endif 3092 break; 3093 3094 case HCI_EVENT_HARDWARE_ERROR: 3095 log_error("Hardware Error: 0x%02x", packet[2]); 3096 if (hci_stack->hardware_error_callback){ 3097 (*hci_stack->hardware_error_callback)(packet[2]); 3098 } else { 3099 // if no special requests, just reboot stack 3100 hci_power_control_off(); 3101 hci_power_control_on(); 3102 } 3103 break; 3104 3105 #ifdef ENABLE_CLASSIC 3106 case HCI_EVENT_ROLE_CHANGE: 3107 if (packet[2]) break; // status != 0 3108 reverse_bd_addr(&packet[3], addr); 3109 addr_type = BD_ADDR_TYPE_ACL; 3110 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3111 if (!conn) break; 3112 conn->role = packet[9]; 3113 break; 3114 #endif 3115 3116 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3117 // release packet buffer only for asynchronous transport and if there are not further fragements 3118 if (hci_transport_synchronous()) { 3119 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3120 return; // instead of break: to avoid re-entering hci_run() 3121 } 3122 hci_stack->acl_fragmentation_tx_active = 0; 3123 if (hci_stack->acl_fragmentation_total_size) break; 3124 hci_release_packet_buffer(); 3125 3126 // L2CAP receives this event via the hci_emit_event below 3127 3128 #ifdef ENABLE_CLASSIC 3129 // For SCO, we do the can_send_now_check here 3130 hci_notify_if_sco_can_send_now(); 3131 #endif 3132 break; 3133 3134 #ifdef ENABLE_CLASSIC 3135 case HCI_EVENT_SCO_CAN_SEND_NOW: 3136 // For SCO, we do the can_send_now_check here 3137 hci_stack->sco_can_send_now = true; 3138 hci_notify_if_sco_can_send_now(); 3139 return; 3140 3141 // explode inquriy results for easier consumption 3142 case HCI_EVENT_INQUIRY_RESULT: 3143 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3144 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3145 gap_inquiry_explode(packet, size); 3146 break; 3147 #endif 3148 3149 #ifdef ENABLE_BLE 3150 case HCI_EVENT_LE_META: 3151 switch (packet[2]){ 3152 #ifdef ENABLE_LE_CENTRAL 3153 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3154 // log_info("advertising report received"); 3155 if (!hci_stack->le_scanning_enabled) break; 3156 le_handle_advertisement_report(packet, size); 3157 break; 3158 #endif 3159 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3160 event_handle_le_connection_complete(packet); 3161 break; 3162 3163 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3164 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3165 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3166 conn = hci_connection_for_handle(handle); 3167 if (!conn) break; 3168 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3169 break; 3170 3171 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3172 // connection 3173 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3174 conn = hci_connection_for_handle(handle); 3175 if (conn) { 3176 // read arguments 3177 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3178 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3179 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3180 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3181 3182 // validate against current connection parameter range 3183 le_connection_parameter_range_t existing_range; 3184 gap_get_connection_parameter_range(&existing_range); 3185 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3186 if (update_parameter){ 3187 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3188 conn->le_conn_interval_min = le_conn_interval_min; 3189 conn->le_conn_interval_max = le_conn_interval_max; 3190 conn->le_conn_latency = le_conn_latency; 3191 conn->le_supervision_timeout = le_supervision_timeout; 3192 } else { 3193 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3194 } 3195 } 3196 break; 3197 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3198 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3199 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3200 conn = hci_connection_for_handle(handle); 3201 if (conn) { 3202 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3203 } 3204 break; 3205 #endif 3206 default: 3207 break; 3208 } 3209 break; 3210 #endif 3211 case HCI_EVENT_VENDOR_SPECIFIC: 3212 // Vendor specific commands often create vendor specific event instead of num completed packets 3213 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3214 switch (hci_stack->manufacturer){ 3215 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3216 hci_stack->num_cmd_packets = 1; 3217 break; 3218 default: 3219 break; 3220 } 3221 break; 3222 default: 3223 break; 3224 } 3225 3226 handle_event_for_current_stack_state(packet, size); 3227 3228 // notify upper stack 3229 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3230 3231 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3232 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3233 handle = little_endian_read_16(packet, 3); 3234 hci_connection_t * aConn = hci_connection_for_handle(handle); 3235 // discard connection if app did not trigger a reconnect in the event handler 3236 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3237 hci_shutdown_connection(aConn); 3238 } 3239 } 3240 3241 // execute main loop 3242 hci_run(); 3243 } 3244 3245 #ifdef ENABLE_CLASSIC 3246 3247 #ifdef ENABLE_SCO_OVER_HCI 3248 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3249 static void sco_schedule_tx(hci_connection_t * conn); 3250 3251 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3252 log_debug("SCO TX Timeout"); 3253 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3254 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3255 if (!conn) return; 3256 3257 // trigger send 3258 conn->sco_tx_ready = 1; 3259 // extra packet if CVSD but SCO buffer is too short 3260 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3261 conn->sco_tx_ready++; 3262 } 3263 hci_notify_if_sco_can_send_now(); 3264 } 3265 3266 3267 #define SCO_TX_AFTER_RX_MS (6) 3268 3269 static void sco_schedule_tx(hci_connection_t * conn){ 3270 3271 uint32_t now = btstack_run_loop_get_time_ms(); 3272 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3273 int time_delta_ms = sco_tx_ms - now; 3274 3275 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3276 3277 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3278 btstack_run_loop_remove_timer(timer); 3279 btstack_run_loop_set_timer(timer, time_delta_ms); 3280 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3281 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3282 btstack_run_loop_add_timer(timer); 3283 } 3284 #endif 3285 3286 static void sco_handler(uint8_t * packet, uint16_t size){ 3287 // lookup connection struct 3288 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3289 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3290 if (!conn) return; 3291 3292 #ifdef ENABLE_SCO_OVER_HCI 3293 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3294 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3295 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3296 packet[2] = 0x3c; 3297 memmove(&packet[3], &packet[23], 63); 3298 size = 63; 3299 } 3300 } 3301 3302 if (hci_have_usb_transport()){ 3303 // Nothing to do 3304 } else { 3305 // 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); 3306 if (hci_stack->synchronous_flow_control_enabled == 0){ 3307 uint32_t now = btstack_run_loop_get_time_ms(); 3308 3309 if (!conn->sco_rx_valid){ 3310 // ignore first 10 packets 3311 conn->sco_rx_count++; 3312 // log_debug("sco rx count %u", conn->sco_rx_count); 3313 if (conn->sco_rx_count == 10) { 3314 // use first timestamp as is and pretent it just started 3315 conn->sco_rx_ms = now; 3316 conn->sco_rx_valid = 1; 3317 conn->sco_rx_count = 0; 3318 sco_schedule_tx(conn); 3319 } 3320 } else { 3321 // track expected arrival timme 3322 conn->sco_rx_count++; 3323 conn->sco_rx_ms += 7; 3324 int delta = (int32_t) (now - conn->sco_rx_ms); 3325 if (delta > 0){ 3326 conn->sco_rx_ms++; 3327 } 3328 // log_debug("sco rx %u", conn->sco_rx_ms); 3329 sco_schedule_tx(conn); 3330 } 3331 } 3332 } 3333 #endif 3334 3335 // deliver to app 3336 if (hci_stack->sco_packet_handler) { 3337 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3338 } 3339 3340 #ifdef HAVE_SCO_TRANSPORT 3341 // We can send one packet for each received packet 3342 conn->sco_tx_ready++; 3343 hci_notify_if_sco_can_send_now(); 3344 #endif 3345 3346 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3347 conn->num_packets_completed++; 3348 hci_stack->host_completed_packets = 1; 3349 hci_run(); 3350 #endif 3351 } 3352 #endif 3353 3354 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3355 hci_dump_packet(packet_type, 1, packet, size); 3356 switch (packet_type) { 3357 case HCI_EVENT_PACKET: 3358 event_handler(packet, size); 3359 break; 3360 case HCI_ACL_DATA_PACKET: 3361 acl_handler(packet, size); 3362 break; 3363 #ifdef ENABLE_CLASSIC 3364 case HCI_SCO_DATA_PACKET: 3365 sco_handler(packet, size); 3366 break; 3367 #endif 3368 default: 3369 break; 3370 } 3371 } 3372 3373 /** 3374 * @brief Add event packet handler. 3375 */ 3376 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3377 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3378 } 3379 3380 3381 /** Register HCI packet handlers */ 3382 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3383 hci_stack->acl_packet_handler = handler; 3384 } 3385 3386 #ifdef ENABLE_CLASSIC 3387 /** 3388 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3389 */ 3390 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3391 hci_stack->sco_packet_handler = handler; 3392 } 3393 #endif 3394 3395 static void hci_state_reset(void){ 3396 // no connections yet 3397 hci_stack->connections = NULL; 3398 3399 // keep discoverable/connectable as this has been requested by the client(s) 3400 // hci_stack->discoverable = 0; 3401 // hci_stack->connectable = 0; 3402 // hci_stack->bondable = 1; 3403 // hci_stack->own_addr_type = 0; 3404 3405 // buffer is free 3406 hci_stack->hci_packet_buffer_reserved = false; 3407 3408 // no pending cmds 3409 hci_stack->decline_reason = 0; 3410 hci_stack->new_scan_enable_value = 0xff; 3411 3412 hci_stack->secure_connections_active = false; 3413 3414 #ifdef ENABLE_CLASSIC 3415 hci_stack->new_page_scan_interval = 0xffff; 3416 hci_stack->new_page_scan_window = 0xffff; 3417 hci_stack->new_page_scan_type = 0xff; 3418 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3419 hci_stack->gap_tasks = 3420 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3421 GAP_TASK_SET_CLASS_OF_DEVICE | 3422 GAP_TASK_SET_LOCAL_NAME | 3423 GAP_TASK_SET_EIR_DATA; 3424 #endif 3425 3426 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3427 hci_stack->classic_read_local_oob_data = true; 3428 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3429 #endif 3430 3431 // LE 3432 #ifdef ENABLE_BLE 3433 memset(hci_stack->le_random_address, 0, 6); 3434 hci_stack->le_random_address_set = 0; 3435 #endif 3436 #ifdef ENABLE_LE_CENTRAL 3437 hci_stack->le_scanning_active = false; 3438 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3439 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3440 hci_stack->le_whitelist_capacity = 0; 3441 #endif 3442 #ifdef ENABLE_LE_PERIPHERAL 3443 hci_stack->le_advertisements_active = false; 3444 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3445 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3446 } 3447 if (hci_stack->le_advertisements_data != NULL){ 3448 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3449 } 3450 #endif 3451 } 3452 3453 #ifdef ENABLE_CLASSIC 3454 /** 3455 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3456 */ 3457 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3458 // store and open remote device db 3459 hci_stack->link_key_db = link_key_db; 3460 if (hci_stack->link_key_db) { 3461 hci_stack->link_key_db->open(); 3462 } 3463 } 3464 #endif 3465 3466 void hci_init(const hci_transport_t *transport, const void *config){ 3467 3468 #ifdef HAVE_MALLOC 3469 if (!hci_stack) { 3470 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3471 } 3472 #else 3473 hci_stack = &hci_stack_static; 3474 #endif 3475 memset(hci_stack, 0, sizeof(hci_stack_t)); 3476 3477 // reference to use transport layer implementation 3478 hci_stack->hci_transport = transport; 3479 3480 // reference to used config 3481 hci_stack->config = config; 3482 3483 // setup pointer for outgoing packet buffer 3484 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3485 3486 // max acl payload size defined in config.h 3487 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3488 3489 // register packet handlers with transport 3490 transport->register_packet_handler(&packet_handler); 3491 3492 hci_stack->state = HCI_STATE_OFF; 3493 3494 // class of device 3495 hci_stack->class_of_device = 0x007a020c; // Smartphone 3496 3497 // bondable by default 3498 hci_stack->bondable = 1; 3499 3500 #ifdef ENABLE_CLASSIC 3501 // classic name 3502 hci_stack->local_name = default_classic_name; 3503 3504 // Master slave policy 3505 hci_stack->master_slave_policy = 1; 3506 3507 // Allow Role Switch 3508 hci_stack->allow_role_switch = 1; 3509 3510 // Default / minimum security level = 2 3511 hci_stack->gap_security_level = LEVEL_2; 3512 3513 // Default Security Mode 4 3514 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3515 3516 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3517 hci_stack->gap_required_encyrption_key_size = 7; 3518 3519 // Link Supervision Timeout 3520 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3521 3522 #endif 3523 3524 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3525 hci_stack->ssp_enable = 1; 3526 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3527 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3528 hci_stack->ssp_auto_accept = 1; 3529 3530 // Secure Connections: enable (requires support from Controller) 3531 hci_stack->secure_connections_enable = true; 3532 3533 // voice setting - signed 16 bit pcm data with CVSD over the air 3534 hci_stack->sco_voice_setting = 0x60; 3535 3536 #ifdef ENABLE_LE_CENTRAL 3537 // connection parameter to use for outgoing connections 3538 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3539 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3540 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3541 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3542 hci_stack->le_connection_latency = 4; // 4 3543 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3544 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3545 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3546 3547 // default LE Scanning 3548 hci_stack->le_scan_type = 0x1; // active 3549 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3550 hci_stack->le_scan_window = 0x30; // 30 ms 3551 #endif 3552 3553 #ifdef ENABLE_LE_PERIPHERAL 3554 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3555 #endif 3556 3557 // connection parameter range used to answer connection parameter update requests in l2cap 3558 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3559 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3560 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3561 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3562 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3563 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3564 3565 hci_state_reset(); 3566 } 3567 3568 void hci_deinit(void){ 3569 #ifdef HAVE_MALLOC 3570 if (hci_stack) { 3571 free(hci_stack); 3572 } 3573 #endif 3574 hci_stack = NULL; 3575 3576 #ifdef ENABLE_CLASSIC 3577 disable_l2cap_timeouts = 0; 3578 #endif 3579 } 3580 3581 /** 3582 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3583 */ 3584 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3585 hci_stack->chipset = chipset_driver; 3586 3587 // reset chipset driver - init is also called on power_up 3588 if (hci_stack->chipset && hci_stack->chipset->init){ 3589 hci_stack->chipset->init(hci_stack->config); 3590 } 3591 } 3592 3593 /** 3594 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3595 */ 3596 void hci_set_control(const btstack_control_t *hardware_control){ 3597 // references to used control implementation 3598 hci_stack->control = hardware_control; 3599 // init with transport config 3600 hardware_control->init(hci_stack->config); 3601 } 3602 3603 void hci_close(void){ 3604 3605 #ifdef ENABLE_CLASSIC 3606 // close remote device db 3607 if (hci_stack->link_key_db) { 3608 hci_stack->link_key_db->close(); 3609 } 3610 #endif 3611 3612 btstack_linked_list_iterator_t lit; 3613 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3614 while (btstack_linked_list_iterator_has_next(&lit)){ 3615 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3616 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3617 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3618 hci_shutdown_connection(connection); 3619 } 3620 3621 hci_power_control(HCI_POWER_OFF); 3622 3623 #ifdef HAVE_MALLOC 3624 free(hci_stack); 3625 #endif 3626 hci_stack = NULL; 3627 } 3628 3629 #ifdef HAVE_SCO_TRANSPORT 3630 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3631 hci_stack->sco_transport = sco_transport; 3632 sco_transport->register_packet_handler(&packet_handler); 3633 } 3634 #endif 3635 3636 #ifdef ENABLE_CLASSIC 3637 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3638 // validate ranage and set 3639 if (encryption_key_size < 7) return; 3640 if (encryption_key_size > 16) return; 3641 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3642 } 3643 3644 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3645 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3646 hci_stack->gap_security_mode = security_mode; 3647 return ERROR_CODE_SUCCESS; 3648 } else { 3649 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3650 } 3651 } 3652 3653 gap_security_mode_t gap_get_security_mode(void){ 3654 return hci_stack->gap_security_mode; 3655 } 3656 3657 void gap_set_security_level(gap_security_level_t security_level){ 3658 hci_stack->gap_security_level = security_level; 3659 } 3660 3661 gap_security_level_t gap_get_security_level(void){ 3662 if (hci_stack->gap_secure_connections_only_mode){ 3663 return LEVEL_4; 3664 } 3665 return hci_stack->gap_security_level; 3666 } 3667 3668 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3669 hci_stack->gap_minimal_service_security_level = security_level; 3670 } 3671 3672 void gap_set_secure_connections_only_mode(bool enable){ 3673 hci_stack->gap_secure_connections_only_mode = enable; 3674 } 3675 3676 bool gap_get_secure_connections_only_mode(void){ 3677 return hci_stack->gap_secure_connections_only_mode; 3678 } 3679 #endif 3680 3681 #ifdef ENABLE_CLASSIC 3682 void gap_set_class_of_device(uint32_t class_of_device){ 3683 hci_stack->class_of_device = class_of_device; 3684 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3685 hci_run(); 3686 } 3687 3688 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3689 hci_stack->default_link_policy_settings = default_link_policy_settings; 3690 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3691 hci_run(); 3692 } 3693 3694 void gap_set_allow_role_switch(bool allow_role_switch){ 3695 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3696 } 3697 3698 uint8_t hci_get_allow_role_switch(void){ 3699 return hci_stack->allow_role_switch; 3700 } 3701 3702 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3703 hci_stack->link_supervision_timeout = link_supervision_timeout; 3704 } 3705 3706 void hci_disable_l2cap_timeout_check(void){ 3707 disable_l2cap_timeouts = 1; 3708 } 3709 #endif 3710 3711 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3712 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3713 void hci_set_bd_addr(bd_addr_t addr){ 3714 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3715 hci_stack->custom_bd_addr_set = 1; 3716 } 3717 #endif 3718 3719 // State-Module-Driver overview 3720 // state module low-level 3721 // HCI_STATE_OFF off close 3722 // HCI_STATE_INITIALIZING, on open 3723 // HCI_STATE_WORKING, on open 3724 // HCI_STATE_HALTING, on open 3725 // HCI_STATE_SLEEPING, off/sleep close 3726 // HCI_STATE_FALLING_ASLEEP on open 3727 3728 static int hci_power_control_on(void){ 3729 3730 // power on 3731 int err = 0; 3732 if (hci_stack->control && hci_stack->control->on){ 3733 err = (*hci_stack->control->on)(); 3734 } 3735 if (err){ 3736 log_error( "POWER_ON failed"); 3737 hci_emit_hci_open_failed(); 3738 return err; 3739 } 3740 3741 // int chipset driver 3742 if (hci_stack->chipset && hci_stack->chipset->init){ 3743 hci_stack->chipset->init(hci_stack->config); 3744 } 3745 3746 // init transport 3747 if (hci_stack->hci_transport->init){ 3748 hci_stack->hci_transport->init(hci_stack->config); 3749 } 3750 3751 // open transport 3752 err = hci_stack->hci_transport->open(); 3753 if (err){ 3754 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3755 if (hci_stack->control && hci_stack->control->off){ 3756 (*hci_stack->control->off)(); 3757 } 3758 hci_emit_hci_open_failed(); 3759 return err; 3760 } 3761 return 0; 3762 } 3763 3764 static void hci_power_control_off(void){ 3765 3766 log_info("hci_power_control_off"); 3767 3768 // close low-level device 3769 hci_stack->hci_transport->close(); 3770 3771 log_info("hci_power_control_off - hci_transport closed"); 3772 3773 // power off 3774 if (hci_stack->control && hci_stack->control->off){ 3775 (*hci_stack->control->off)(); 3776 } 3777 3778 log_info("hci_power_control_off - control closed"); 3779 3780 hci_stack->state = HCI_STATE_OFF; 3781 } 3782 3783 static void hci_power_control_sleep(void){ 3784 3785 log_info("hci_power_control_sleep"); 3786 3787 #if 0 3788 // don't close serial port during sleep 3789 3790 // close low-level device 3791 hci_stack->hci_transport->close(hci_stack->config); 3792 #endif 3793 3794 // sleep mode 3795 if (hci_stack->control && hci_stack->control->sleep){ 3796 (*hci_stack->control->sleep)(); 3797 } 3798 3799 hci_stack->state = HCI_STATE_SLEEPING; 3800 } 3801 3802 static int hci_power_control_wake(void){ 3803 3804 log_info("hci_power_control_wake"); 3805 3806 // wake on 3807 if (hci_stack->control && hci_stack->control->wake){ 3808 (*hci_stack->control->wake)(); 3809 } 3810 3811 #if 0 3812 // open low-level device 3813 int err = hci_stack->hci_transport->open(hci_stack->config); 3814 if (err){ 3815 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3816 if (hci_stack->control && hci_stack->control->off){ 3817 (*hci_stack->control->off)(); 3818 } 3819 hci_emit_hci_open_failed(); 3820 return err; 3821 } 3822 #endif 3823 3824 return 0; 3825 } 3826 3827 static void hci_power_transition_to_initializing(void){ 3828 // set up state machine 3829 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3830 hci_stack->hci_packet_buffer_reserved = false; 3831 hci_stack->state = HCI_STATE_INITIALIZING; 3832 hci_stack->substate = HCI_INIT_SEND_RESET; 3833 } 3834 3835 // returns error 3836 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3837 int err; 3838 switch (power_mode){ 3839 case HCI_POWER_ON: 3840 err = hci_power_control_on(); 3841 if (err != 0) { 3842 log_error("hci_power_control_on() error %d", err); 3843 return err; 3844 } 3845 hci_power_transition_to_initializing(); 3846 break; 3847 case HCI_POWER_OFF: 3848 // do nothing 3849 break; 3850 case HCI_POWER_SLEEP: 3851 // do nothing (with SLEEP == OFF) 3852 break; 3853 default: 3854 btstack_assert(false); 3855 break; 3856 } 3857 return ERROR_CODE_SUCCESS; 3858 } 3859 3860 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3861 switch (power_mode){ 3862 case HCI_POWER_ON: 3863 // do nothing 3864 break; 3865 case HCI_POWER_OFF: 3866 // no connections yet, just turn it off 3867 hci_power_control_off(); 3868 break; 3869 case HCI_POWER_SLEEP: 3870 // no connections yet, just turn it off 3871 hci_power_control_sleep(); 3872 break; 3873 default: 3874 btstack_assert(false); 3875 break; 3876 } 3877 return ERROR_CODE_SUCCESS; 3878 } 3879 3880 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3881 switch (power_mode){ 3882 case HCI_POWER_ON: 3883 // do nothing 3884 break; 3885 case HCI_POWER_OFF: 3886 // see hci_run 3887 hci_stack->state = HCI_STATE_HALTING; 3888 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3889 break; 3890 case HCI_POWER_SLEEP: 3891 // see hci_run 3892 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3893 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3894 break; 3895 default: 3896 btstack_assert(false); 3897 break; 3898 } 3899 return ERROR_CODE_SUCCESS; 3900 } 3901 3902 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3903 switch (power_mode){ 3904 case HCI_POWER_ON: 3905 hci_power_transition_to_initializing(); 3906 break; 3907 case HCI_POWER_OFF: 3908 // do nothing 3909 break; 3910 case HCI_POWER_SLEEP: 3911 // see hci_run 3912 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3913 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3914 break; 3915 default: 3916 btstack_assert(false); 3917 break; 3918 } 3919 return ERROR_CODE_SUCCESS; 3920 } 3921 3922 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3923 switch (power_mode){ 3924 case HCI_POWER_ON: 3925 3926 #ifdef HAVE_PLATFORM_IPHONE_OS 3927 // nothing to do, if H4 supports power management 3928 if (btstack_control_iphone_power_management_enabled()){ 3929 hci_stack->state = HCI_STATE_INITIALIZING; 3930 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3931 break; 3932 } 3933 #endif 3934 hci_power_transition_to_initializing(); 3935 break; 3936 case HCI_POWER_OFF: 3937 // see hci_run 3938 hci_stack->state = HCI_STATE_HALTING; 3939 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3940 break; 3941 case HCI_POWER_SLEEP: 3942 // do nothing 3943 break; 3944 default: 3945 btstack_assert(false); 3946 break; 3947 } 3948 return ERROR_CODE_SUCCESS; 3949 } 3950 3951 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3952 int err; 3953 switch (power_mode){ 3954 case HCI_POWER_ON: 3955 #ifdef HAVE_PLATFORM_IPHONE_OS 3956 // nothing to do, if H4 supports power management 3957 if (btstack_control_iphone_power_management_enabled()){ 3958 hci_stack->state = HCI_STATE_INITIALIZING; 3959 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3960 hci_update_scan_enable(); 3961 break; 3962 } 3963 #endif 3964 err = hci_power_control_wake(); 3965 if (err) return err; 3966 hci_power_transition_to_initializing(); 3967 break; 3968 case HCI_POWER_OFF: 3969 hci_stack->state = HCI_STATE_HALTING; 3970 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3971 break; 3972 case HCI_POWER_SLEEP: 3973 // do nothing 3974 break; 3975 default: 3976 btstack_assert(false); 3977 break; 3978 } 3979 return ERROR_CODE_SUCCESS; 3980 } 3981 3982 int hci_power_control(HCI_POWER_MODE power_mode){ 3983 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3984 int err = 0; 3985 switch (hci_stack->state){ 3986 case HCI_STATE_OFF: 3987 err = hci_power_control_state_off(power_mode); 3988 break; 3989 case HCI_STATE_INITIALIZING: 3990 err = hci_power_control_state_initializing(power_mode); 3991 break; 3992 case HCI_STATE_WORKING: 3993 err = hci_power_control_state_working(power_mode); 3994 break; 3995 case HCI_STATE_HALTING: 3996 err = hci_power_control_state_halting(power_mode); 3997 break; 3998 case HCI_STATE_FALLING_ASLEEP: 3999 err = hci_power_control_state_falling_asleep(power_mode); 4000 break; 4001 case HCI_STATE_SLEEPING: 4002 err = hci_power_control_state_sleeping(power_mode); 4003 break; 4004 default: 4005 btstack_assert(false); 4006 break; 4007 } 4008 if (err != 0){ 4009 return err; 4010 } 4011 4012 // create internal event 4013 hci_emit_state(); 4014 4015 // trigger next/first action 4016 hci_run(); 4017 4018 return 0; 4019 } 4020 4021 4022 #ifdef ENABLE_CLASSIC 4023 4024 static void hci_update_scan_enable(void){ 4025 // 2 = page scan, 1 = inq scan 4026 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4027 hci_run(); 4028 } 4029 4030 void gap_discoverable_control(uint8_t enable){ 4031 if (enable) enable = 1; // normalize argument 4032 4033 if (hci_stack->discoverable == enable){ 4034 hci_emit_discoverable_enabled(hci_stack->discoverable); 4035 return; 4036 } 4037 4038 hci_stack->discoverable = enable; 4039 hci_update_scan_enable(); 4040 } 4041 4042 void gap_connectable_control(uint8_t enable){ 4043 if (enable) enable = 1; // normalize argument 4044 4045 // don't emit event 4046 if (hci_stack->connectable == enable) return; 4047 4048 hci_stack->connectable = enable; 4049 hci_update_scan_enable(); 4050 } 4051 #endif 4052 4053 void gap_local_bd_addr(bd_addr_t address_buffer){ 4054 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4055 } 4056 4057 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4058 static void hci_host_num_completed_packets(void){ 4059 4060 // create packet manually as arrays are not supported and num_commands should not get reduced 4061 hci_reserve_packet_buffer(); 4062 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4063 4064 uint16_t size = 0; 4065 uint16_t num_handles = 0; 4066 packet[size++] = 0x35; 4067 packet[size++] = 0x0c; 4068 size++; // skip param len 4069 size++; // skip num handles 4070 4071 // add { handle, packets } entries 4072 btstack_linked_item_t * it; 4073 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4074 hci_connection_t * connection = (hci_connection_t *) it; 4075 if (connection->num_packets_completed){ 4076 little_endian_store_16(packet, size, connection->con_handle); 4077 size += 2; 4078 little_endian_store_16(packet, size, connection->num_packets_completed); 4079 size += 2; 4080 // 4081 num_handles++; 4082 connection->num_packets_completed = 0; 4083 } 4084 } 4085 4086 packet[2] = size - 3; 4087 packet[3] = num_handles; 4088 4089 hci_stack->host_completed_packets = 0; 4090 4091 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4092 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4093 4094 // release packet buffer for synchronous transport implementations 4095 if (hci_transport_synchronous()){ 4096 hci_release_packet_buffer(); 4097 hci_emit_transport_packet_sent(); 4098 } 4099 } 4100 #endif 4101 4102 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4103 UNUSED(ds); 4104 hci_stack->substate = HCI_HALTING_CLOSE; 4105 // allow packet handlers to defer final shutdown 4106 hci_emit_state(); 4107 hci_run(); 4108 } 4109 4110 static bool hci_run_acl_fragments(void){ 4111 if (hci_stack->acl_fragmentation_total_size > 0u) { 4112 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4113 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4114 if (connection) { 4115 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4116 hci_send_acl_packet_fragments(connection); 4117 return true; 4118 } 4119 } else { 4120 // connection gone -> discard further fragments 4121 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4122 hci_stack->acl_fragmentation_total_size = 0; 4123 hci_stack->acl_fragmentation_pos = 0; 4124 } 4125 } 4126 return false; 4127 } 4128 4129 #ifdef ENABLE_CLASSIC 4130 static bool hci_run_general_gap_classic(void){ 4131 4132 // assert stack is working and classic is active 4133 if (hci_classic_supported() == false) return false; 4134 if (hci_stack->state != HCI_STATE_WORKING) return false; 4135 4136 // decline incoming connections 4137 if (hci_stack->decline_reason){ 4138 uint8_t reason = hci_stack->decline_reason; 4139 hci_stack->decline_reason = 0; 4140 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4141 return true; 4142 } 4143 4144 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4145 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4146 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4147 return true; 4148 } 4149 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4150 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4151 gap_run_set_local_name(); 4152 return true; 4153 } 4154 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4155 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4156 gap_run_set_eir_data(); 4157 return true; 4158 } 4159 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4160 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4161 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4162 return true; 4163 } 4164 // write page scan activity 4165 if (hci_stack->new_page_scan_interval != 0xffff) { 4166 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4167 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4168 hci_stack->new_page_scan_interval = 0xffff; 4169 hci_stack->new_page_scan_window = 0xffff; 4170 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4171 return true; 4172 } 4173 // write page scan type 4174 if (hci_stack->new_page_scan_type != 0xff) { 4175 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4176 hci_stack->new_page_scan_type = 0xff; 4177 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4178 return true; 4179 } 4180 // send scan enable 4181 if (hci_stack->new_scan_enable_value != 0xff) { 4182 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4183 hci_stack->new_scan_enable_value = 0xff; 4184 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4185 return true; 4186 } 4187 4188 // start/stop inquiry 4189 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4190 uint8_t duration = hci_stack->inquiry_state; 4191 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4192 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4193 return true; 4194 } 4195 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4196 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4197 hci_send_cmd(&hci_inquiry_cancel); 4198 return true; 4199 } 4200 // remote name request 4201 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4202 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4203 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4204 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4205 return true; 4206 } 4207 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4208 // Local OOB data 4209 if (hci_stack->classic_read_local_oob_data){ 4210 hci_stack->classic_read_local_oob_data = false; 4211 if (hci_stack->local_supported_commands[1] & 0x10u){ 4212 hci_send_cmd(&hci_read_local_extended_oob_data); 4213 } else { 4214 hci_send_cmd(&hci_read_local_oob_data); 4215 } 4216 } 4217 #endif 4218 // pairing 4219 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4220 uint8_t state = hci_stack->gap_pairing_state; 4221 uint8_t pin_code[16]; 4222 switch (state){ 4223 case GAP_PAIRING_STATE_SEND_PIN: 4224 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4225 memset(pin_code, 0, 16); 4226 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4227 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4228 break; 4229 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4230 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4231 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4232 break; 4233 case GAP_PAIRING_STATE_SEND_PASSKEY: 4234 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4235 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4236 break; 4237 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4238 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4239 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4240 break; 4241 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4242 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4243 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4244 break; 4245 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4246 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4247 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4248 break; 4249 default: 4250 break; 4251 } 4252 return true; 4253 } 4254 return false; 4255 } 4256 #endif 4257 4258 #ifdef ENABLE_BLE 4259 static bool hci_run_general_gap_le(void){ 4260 4261 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4262 4263 if (hci_stack->state != HCI_STATE_WORKING) return false; 4264 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4265 4266 4267 // Phase 1: collect what to stop 4268 4269 bool scanning_stop = false; 4270 bool connecting_stop = false; 4271 bool advertising_stop = false; 4272 4273 #ifndef ENABLE_LE_CENTRAL 4274 UNUSED(scanning_stop); 4275 UNUSED(connecting_stop); 4276 #endif 4277 #ifndef ENABLE_LE_PERIPHERAL 4278 UNUSED(advertising_stop); 4279 #endif 4280 4281 // check if whitelist needs modification 4282 bool whitelist_modification_pending = false; 4283 btstack_linked_list_iterator_t lit; 4284 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4285 while (btstack_linked_list_iterator_has_next(&lit)){ 4286 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4287 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4288 whitelist_modification_pending = true; 4289 break; 4290 } 4291 } 4292 // check if resolving list needs modification 4293 bool resolving_list_modification_pending = false; 4294 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4295 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4296 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4297 resolving_list_modification_pending = true; 4298 } 4299 #endif 4300 4301 #ifdef ENABLE_LE_CENTRAL 4302 // scanning control 4303 if (hci_stack->le_scanning_active) { 4304 // stop if: 4305 // - parameter change required 4306 // - it's disabled 4307 // - whitelist change required but used for scanning 4308 // - resolving list modified 4309 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4310 if ((hci_stack->le_scanning_param_update) || 4311 !hci_stack->le_scanning_enabled || 4312 scanning_uses_whitelist || 4313 resolving_list_modification_pending){ 4314 4315 scanning_stop = true; 4316 } 4317 } 4318 #endif 4319 4320 #ifdef ENABLE_LE_CENTRAL 4321 // connecting control 4322 bool connecting_with_whitelist; 4323 switch (hci_stack->le_connecting_state){ 4324 case LE_CONNECTING_DIRECT: 4325 case LE_CONNECTING_WHITELIST: 4326 // stop connecting if: 4327 // - connecting uses white and whitelist modification pending 4328 // - if it got disabled 4329 // - resolving list modified 4330 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4331 if ((connecting_with_whitelist && whitelist_modification_pending) || 4332 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4333 resolving_list_modification_pending) { 4334 4335 connecting_stop = true; 4336 } 4337 break; 4338 default: 4339 break; 4340 } 4341 #endif 4342 4343 #ifdef ENABLE_LE_PERIPHERAL 4344 // le advertisement control 4345 if (hci_stack->le_advertisements_active){ 4346 // stop if: 4347 // - parameter change required 4348 // - it's disabled 4349 // - whitelist change required but used for advertisement filter policy 4350 // - resolving list modified 4351 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4352 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4353 if (advertising_change || 4354 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4355 (advertising_uses_whitelist & whitelist_modification_pending) || 4356 resolving_list_modification_pending) { 4357 4358 advertising_stop = true; 4359 } 4360 } 4361 #endif 4362 4363 4364 // Phase 2: stop everything that should be off during modifications 4365 4366 #ifdef ENABLE_LE_CENTRAL 4367 if (scanning_stop){ 4368 hci_stack->le_scanning_active = false; 4369 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4370 return true; 4371 } 4372 #endif 4373 4374 #ifdef ENABLE_LE_CENTRAL 4375 if (connecting_stop){ 4376 hci_send_cmd(&hci_le_create_connection_cancel); 4377 return true; 4378 } 4379 #endif 4380 4381 #ifdef ENABLE_LE_PERIPHERAL 4382 if (advertising_stop){ 4383 hci_stack->le_advertisements_active = false; 4384 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4385 return true; 4386 } 4387 #endif 4388 4389 // Phase 3: modify 4390 4391 #ifdef ENABLE_LE_CENTRAL 4392 if (hci_stack->le_scanning_param_update){ 4393 hci_stack->le_scanning_param_update = false; 4394 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4395 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4396 return true; 4397 } 4398 #endif 4399 4400 #ifdef ENABLE_LE_PERIPHERAL 4401 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4402 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4403 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4404 hci_send_cmd(&hci_le_set_advertising_parameters, 4405 hci_stack->le_advertisements_interval_min, 4406 hci_stack->le_advertisements_interval_max, 4407 hci_stack->le_advertisements_type, 4408 hci_stack->le_advertisements_own_addr_type, 4409 hci_stack->le_advertisements_direct_address_type, 4410 hci_stack->le_advertisements_direct_address, 4411 hci_stack->le_advertisements_channel_map, 4412 hci_stack->le_advertisements_filter_policy); 4413 return true; 4414 } 4415 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4416 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4417 uint8_t adv_data_clean[31]; 4418 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4419 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4420 hci_stack->le_advertisements_data_len); 4421 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4422 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4423 return true; 4424 } 4425 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4426 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4427 uint8_t scan_data_clean[31]; 4428 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4429 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4430 hci_stack->le_scan_response_data_len); 4431 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4432 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4433 return true; 4434 } 4435 #endif 4436 4437 4438 #ifdef ENABLE_LE_CENTRAL 4439 // if connect with whitelist was active and is not cancelled yet, wait until next time 4440 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4441 #endif 4442 4443 // LE Whitelist Management 4444 if (whitelist_modification_pending){ 4445 // add/remove entries 4446 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4447 while (btstack_linked_list_iterator_has_next(&lit)){ 4448 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4449 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4450 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4451 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4452 return true; 4453 } 4454 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4455 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4456 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4457 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4458 return true; 4459 } 4460 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4461 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4462 btstack_memory_whitelist_entry_free(entry); 4463 } 4464 } 4465 } 4466 4467 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4468 // LE Resolving List Management 4469 if (resolving_list_supported) { 4470 uint16_t i; 4471 switch (hci_stack->le_resolving_list_state) { 4472 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4473 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4474 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4475 return true; 4476 case LE_RESOLVING_LIST_READ_SIZE: 4477 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4478 hci_send_cmd(&hci_le_read_resolving_list_size); 4479 return true; 4480 case LE_RESOLVING_LIST_SEND_CLEAR: 4481 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4482 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4483 sizeof(hci_stack->le_resolving_list_add_entries)); 4484 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4485 sizeof(hci_stack->le_resolving_list_remove_entries)); 4486 hci_send_cmd(&hci_le_clear_resolving_list); 4487 return true; 4488 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4489 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4490 uint8_t offset = i >> 3; 4491 uint8_t mask = 1 << (i & 7); 4492 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4493 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4494 bd_addr_t peer_identity_addreses; 4495 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4496 sm_key_t peer_irk; 4497 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4498 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4499 4500 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4501 // trigger whitelist entry 'update' (work around for controller bug) 4502 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4503 while (btstack_linked_list_iterator_has_next(&lit)) { 4504 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4505 if (entry->address_type != peer_identity_addr_type) continue; 4506 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4507 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4508 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4509 } 4510 #endif 4511 4512 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4513 peer_identity_addreses); 4514 return true; 4515 } 4516 4517 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4518 4519 /* fall through */ 4520 4521 case LE_RESOLVING_LIST_ADD_ENTRIES: 4522 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4523 uint8_t offset = i >> 3; 4524 uint8_t mask = 1 << (i & 7); 4525 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4526 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4527 bd_addr_t peer_identity_addreses; 4528 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4529 sm_key_t peer_irk; 4530 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4531 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4532 const uint8_t *local_irk = gap_get_persistent_irk(); 4533 // command uses format specifier 'P' that stores 16-byte value without flip 4534 uint8_t local_irk_flipped[16]; 4535 uint8_t peer_irk_flipped[16]; 4536 reverse_128(local_irk, local_irk_flipped); 4537 reverse_128(peer_irk, peer_irk_flipped); 4538 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4539 peer_irk_flipped, local_irk_flipped); 4540 return true; 4541 } 4542 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4543 break; 4544 4545 default: 4546 break; 4547 } 4548 } 4549 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4550 #endif 4551 4552 // Phase 4: restore state 4553 4554 #ifdef ENABLE_LE_CENTRAL 4555 // re-start scanning 4556 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4557 hci_stack->le_scanning_active = true; 4558 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4559 return true; 4560 } 4561 #endif 4562 4563 #ifdef ENABLE_LE_CENTRAL 4564 // re-start connecting 4565 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4566 bd_addr_t null_addr; 4567 memset(null_addr, 0, 6); 4568 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4569 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4570 hci_send_cmd(&hci_le_create_connection, 4571 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4572 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4573 1, // use whitelist 4574 0, // peer address type 4575 null_addr, // peer bd addr 4576 hci_stack->le_connection_own_addr_type, // our addr type: 4577 hci_stack->le_connection_interval_min, // conn interval min 4578 hci_stack->le_connection_interval_max, // conn interval max 4579 hci_stack->le_connection_latency, // conn latency 4580 hci_stack->le_supervision_timeout, // conn latency 4581 hci_stack->le_minimum_ce_length, // min ce length 4582 hci_stack->le_maximum_ce_length // max ce length 4583 ); 4584 return true; 4585 } 4586 #endif 4587 4588 #ifdef ENABLE_LE_PERIPHERAL 4589 // re-start advertising 4590 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4591 // check if advertisements should be enabled given 4592 hci_stack->le_advertisements_active = true; 4593 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4594 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4595 return true; 4596 } 4597 #endif 4598 4599 return false; 4600 } 4601 #endif 4602 4603 static bool hci_run_general_pending_commands(void){ 4604 btstack_linked_item_t * it; 4605 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4606 hci_connection_t * connection = (hci_connection_t *) it; 4607 4608 switch(connection->state){ 4609 case SEND_CREATE_CONNECTION: 4610 switch(connection->address_type){ 4611 #ifdef ENABLE_CLASSIC 4612 case BD_ADDR_TYPE_ACL: 4613 log_info("sending hci_create_connection"); 4614 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4615 break; 4616 #endif 4617 default: 4618 #ifdef ENABLE_BLE 4619 #ifdef ENABLE_LE_CENTRAL 4620 log_info("sending hci_le_create_connection"); 4621 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4622 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4623 hci_send_cmd(&hci_le_create_connection, 4624 hci_stack->le_connection_scan_interval, // conn scan interval 4625 hci_stack->le_connection_scan_window, // conn scan windows 4626 0, // don't use whitelist 4627 connection->address_type, // peer address type 4628 connection->address, // peer bd addr 4629 hci_stack->le_connection_own_addr_type, // our addr type: 4630 hci_stack->le_connection_interval_min, // conn interval min 4631 hci_stack->le_connection_interval_max, // conn interval max 4632 hci_stack->le_connection_latency, // conn latency 4633 hci_stack->le_supervision_timeout, // conn latency 4634 hci_stack->le_minimum_ce_length, // min ce length 4635 hci_stack->le_maximum_ce_length // max ce length 4636 ); 4637 connection->state = SENT_CREATE_CONNECTION; 4638 #endif 4639 #endif 4640 break; 4641 } 4642 return true; 4643 4644 #ifdef ENABLE_CLASSIC 4645 case RECEIVED_CONNECTION_REQUEST: 4646 connection->role = HCI_ROLE_SLAVE; 4647 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4648 log_info("sending hci_accept_connection_request"); 4649 connection->state = ACCEPTED_CONNECTION_REQUEST; 4650 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4651 } 4652 return true; 4653 #endif 4654 4655 #ifdef ENABLE_BLE 4656 #ifdef ENABLE_LE_CENTRAL 4657 case SEND_CANCEL_CONNECTION: 4658 connection->state = SENT_CANCEL_CONNECTION; 4659 hci_send_cmd(&hci_le_create_connection_cancel); 4660 return true; 4661 #endif 4662 #endif 4663 case SEND_DISCONNECT: 4664 connection->state = SENT_DISCONNECT; 4665 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4666 return true; 4667 4668 default: 4669 break; 4670 } 4671 4672 // no further commands if connection is about to get shut down 4673 if (connection->state == SENT_DISCONNECT) continue; 4674 4675 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4676 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4677 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4678 return true; 4679 } 4680 4681 #ifdef ENABLE_CLASSIC 4682 4683 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4684 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4685 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4686 return true; 4687 } 4688 4689 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4690 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4691 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4692 return true; 4693 } 4694 4695 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4696 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4697 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4698 return true; 4699 } 4700 4701 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4702 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4703 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4704 return true; 4705 } 4706 4707 // Handling link key request requires remote supported features 4708 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4709 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4710 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4711 4712 // lookup link key using cached key first 4713 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4714 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4715 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4716 } 4717 4718 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4719 if (have_link_key && security_level_sufficient){ 4720 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4721 } else { 4722 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4723 } 4724 return true; 4725 } 4726 4727 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4728 log_info("denying to pin request"); 4729 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4730 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4731 return true; 4732 } 4733 4734 // security assessment requires remote features 4735 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4736 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4737 hci_ssp_assess_security_on_io_cap_request(connection); 4738 // 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 4739 } 4740 4741 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4742 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4743 // set authentication requirements: 4744 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4745 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4746 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4747 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4748 authreq |= 1; 4749 } 4750 bool bonding = hci_stack->bondable; 4751 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4752 // if we have received IO Cap Response, we're in responder role 4753 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4754 if (bonding && !remote_bonding){ 4755 log_info("Remote not bonding, dropping local flag"); 4756 bonding = false; 4757 } 4758 } 4759 if (bonding){ 4760 if (connection->bonding_flags & BONDING_DEDICATED){ 4761 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4762 } else { 4763 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4764 } 4765 } 4766 uint8_t have_oob_data = 0; 4767 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4768 if (connection->classic_oob_c_192 != NULL){ 4769 have_oob_data |= 1; 4770 } 4771 if (connection->classic_oob_c_256 != NULL){ 4772 have_oob_data |= 2; 4773 } 4774 #endif 4775 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4776 return true; 4777 } 4778 4779 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4780 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4781 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4782 return true; 4783 } 4784 4785 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4786 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4787 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4788 const uint8_t zero[16] = { 0 }; 4789 const uint8_t * r_192 = zero; 4790 const uint8_t * c_192 = zero; 4791 const uint8_t * r_256 = zero; 4792 const uint8_t * c_256 = zero; 4793 // verify P-256 OOB 4794 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4795 c_256 = connection->classic_oob_c_256; 4796 if (connection->classic_oob_r_256 != NULL) { 4797 r_256 = connection->classic_oob_r_256; 4798 } 4799 } 4800 // verify P-192 OOB 4801 if ((connection->classic_oob_c_192 != NULL)) { 4802 c_192 = connection->classic_oob_c_192; 4803 if (connection->classic_oob_r_192 != NULL) { 4804 r_192 = connection->classic_oob_r_192; 4805 } 4806 } 4807 4808 // assess security 4809 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4810 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4811 if (need_level_4 && !can_reach_level_4){ 4812 log_info("Level 4 required, but not possible -> abort"); 4813 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4814 // send oob negative reply 4815 c_256 = NULL; 4816 c_192 = NULL; 4817 } 4818 4819 // Reply 4820 if (c_256 != zero) { 4821 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4822 } else if (c_192 != zero){ 4823 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4824 } else { 4825 hci_stack->classic_oob_con_handle = connection->con_handle; 4826 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4827 } 4828 return true; 4829 } 4830 #endif 4831 4832 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4833 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4834 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4835 return true; 4836 } 4837 4838 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4839 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4840 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4841 return true; 4842 } 4843 4844 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4845 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4846 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4847 return true; 4848 } 4849 4850 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4851 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4852 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4853 connection->state = SENT_DISCONNECT; 4854 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4855 return true; 4856 } 4857 4858 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4859 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4860 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4861 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4862 return true; 4863 } 4864 4865 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4866 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4867 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4868 return true; 4869 } 4870 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4871 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4872 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4873 return true; 4874 } 4875 #endif 4876 4877 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4878 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4879 #ifdef ENABLE_CLASSIC 4880 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4881 #endif 4882 if (connection->state != SENT_DISCONNECT){ 4883 connection->state = SENT_DISCONNECT; 4884 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4885 return true; 4886 } 4887 } 4888 4889 #ifdef ENABLE_CLASSIC 4890 uint16_t sniff_min_interval; 4891 switch (connection->sniff_min_interval){ 4892 case 0: 4893 break; 4894 case 0xffff: 4895 connection->sniff_min_interval = 0; 4896 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4897 return true; 4898 default: 4899 sniff_min_interval = connection->sniff_min_interval; 4900 connection->sniff_min_interval = 0; 4901 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4902 return true; 4903 } 4904 4905 if (connection->sniff_subrating_max_latency != 0xffff){ 4906 uint16_t max_latency = connection->sniff_subrating_max_latency; 4907 connection->sniff_subrating_max_latency = 0; 4908 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4909 return true; 4910 } 4911 4912 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4913 uint8_t service_type = (uint8_t) connection->qos_service_type; 4914 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4915 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); 4916 return true; 4917 } 4918 4919 if (connection->request_role != HCI_ROLE_INVALID){ 4920 hci_role_t role = connection->request_role; 4921 connection->request_role = HCI_ROLE_INVALID; 4922 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4923 return true; 4924 } 4925 #endif 4926 4927 #ifdef ENABLE_BLE 4928 switch (connection->le_con_parameter_update_state){ 4929 // response to L2CAP CON PARAMETER UPDATE REQUEST 4930 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4931 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4932 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4933 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4934 0x0000, 0xffff); 4935 return true; 4936 case CON_PARAMETER_UPDATE_REPLY: 4937 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4938 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4939 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4940 0x0000, 0xffff); 4941 return true; 4942 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4943 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4944 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4945 return true; 4946 default: 4947 break; 4948 } 4949 if (connection->le_phy_update_all_phys != 0xffu){ 4950 uint8_t all_phys = connection->le_phy_update_all_phys; 4951 connection->le_phy_update_all_phys = 0xff; 4952 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); 4953 return true; 4954 } 4955 #endif 4956 } 4957 return false; 4958 } 4959 4960 static void hci_run(void){ 4961 4962 bool done; 4963 4964 // send continuation fragments first, as they block the prepared packet buffer 4965 done = hci_run_acl_fragments(); 4966 if (done) return; 4967 4968 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4969 // send host num completed packets next as they don't require num_cmd_packets > 0 4970 if (!hci_can_send_comand_packet_transport()) return; 4971 if (hci_stack->host_completed_packets){ 4972 hci_host_num_completed_packets(); 4973 return; 4974 } 4975 #endif 4976 4977 if (!hci_can_send_command_packet_now()) return; 4978 4979 // global/non-connection oriented commands 4980 4981 4982 #ifdef ENABLE_CLASSIC 4983 // general gap classic 4984 done = hci_run_general_gap_classic(); 4985 if (done) return; 4986 #endif 4987 4988 #ifdef ENABLE_BLE 4989 // general gap le 4990 done = hci_run_general_gap_le(); 4991 if (done) return; 4992 #endif 4993 4994 // send pending HCI commands 4995 done = hci_run_general_pending_commands(); 4996 if (done) return; 4997 4998 // stack state sub statemachines 4999 hci_connection_t * connection; 5000 switch (hci_stack->state){ 5001 case HCI_STATE_INITIALIZING: 5002 hci_initializing_run(); 5003 break; 5004 5005 case HCI_STATE_HALTING: 5006 5007 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5008 switch (hci_stack->substate){ 5009 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5010 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5011 5012 #ifdef ENABLE_BLE 5013 #ifdef ENABLE_LE_CENTRAL 5014 // free whitelist entries 5015 { 5016 btstack_linked_list_iterator_t lit; 5017 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5018 while (btstack_linked_list_iterator_has_next(&lit)){ 5019 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5020 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5021 btstack_memory_whitelist_entry_free(entry); 5022 } 5023 } 5024 #endif 5025 #endif 5026 // close all open connections 5027 connection = (hci_connection_t *) hci_stack->connections; 5028 if (connection){ 5029 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5030 if (!hci_can_send_command_packet_now()) return; 5031 5032 // check state 5033 if (connection->state == SENT_DISCONNECT) return; 5034 connection->state = SENT_DISCONNECT; 5035 5036 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5037 5038 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5039 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5040 5041 // ... which would be ignored anyway as we shutdown (free) the connection now 5042 hci_shutdown_connection(connection); 5043 5044 // finally, send the disconnect command 5045 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5046 return; 5047 } 5048 5049 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5050 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5051 log_info("HCI_STATE_HALTING: wait 50 ms"); 5052 hci_stack->substate = HCI_HALTING_W4_TIMER; 5053 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5054 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5055 btstack_run_loop_add_timer(&hci_stack->timeout); 5056 break; 5057 } 5058 5059 /* fall through */ 5060 5061 case HCI_HALTING_CLOSE: 5062 log_info("HCI_STATE_HALTING, calling off"); 5063 5064 // switch mode 5065 hci_power_control_off(); 5066 5067 log_info("HCI_STATE_HALTING, emitting state"); 5068 hci_emit_state(); 5069 log_info("HCI_STATE_HALTING, done"); 5070 break; 5071 5072 case HCI_HALTING_W4_TIMER: 5073 // keep waiting 5074 5075 break; 5076 default: 5077 break; 5078 } 5079 5080 break; 5081 5082 case HCI_STATE_FALLING_ASLEEP: 5083 switch(hci_stack->substate) { 5084 case HCI_FALLING_ASLEEP_DISCONNECT: 5085 log_info("HCI_STATE_FALLING_ASLEEP"); 5086 // close all open connections 5087 connection = (hci_connection_t *) hci_stack->connections; 5088 5089 #ifdef HAVE_PLATFORM_IPHONE_OS 5090 // don't close connections, if H4 supports power management 5091 if (btstack_control_iphone_power_management_enabled()){ 5092 connection = NULL; 5093 } 5094 #endif 5095 if (connection){ 5096 5097 // send disconnect 5098 if (!hci_can_send_command_packet_now()) return; 5099 5100 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5101 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5102 5103 // send disconnected event right away - causes higher layer connections to get closed, too. 5104 hci_shutdown_connection(connection); 5105 return; 5106 } 5107 5108 if (hci_classic_supported()){ 5109 // disable page and inquiry scan 5110 if (!hci_can_send_command_packet_now()) return; 5111 5112 log_info("HCI_STATE_HALTING, disabling inq scans"); 5113 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5114 5115 // continue in next sub state 5116 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5117 break; 5118 } 5119 5120 /* fall through */ 5121 5122 case HCI_FALLING_ASLEEP_COMPLETE: 5123 log_info("HCI_STATE_HALTING, calling sleep"); 5124 #ifdef HAVE_PLATFORM_IPHONE_OS 5125 // don't actually go to sleep, if H4 supports power management 5126 if (btstack_control_iphone_power_management_enabled()){ 5127 // SLEEP MODE reached 5128 hci_stack->state = HCI_STATE_SLEEPING; 5129 hci_emit_state(); 5130 break; 5131 } 5132 #endif 5133 // switch mode 5134 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5135 hci_emit_state(); 5136 break; 5137 5138 default: 5139 break; 5140 } 5141 break; 5142 5143 default: 5144 break; 5145 } 5146 } 5147 5148 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5149 // house-keeping 5150 5151 #ifdef ENABLE_CLASSIC 5152 bd_addr_t addr; 5153 hci_connection_t * conn; 5154 #endif 5155 #ifdef ENABLE_LE_CENTRAL 5156 uint8_t initiator_filter_policy; 5157 #endif 5158 5159 uint16_t opcode = little_endian_read_16(packet, 0); 5160 switch (opcode) { 5161 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5162 hci_stack->loopback_mode = packet[3]; 5163 break; 5164 5165 #ifdef ENABLE_CLASSIC 5166 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5167 reverse_bd_addr(&packet[3], addr); 5168 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5169 5170 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5171 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5172 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5173 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5174 } 5175 5176 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5177 if (!conn) { 5178 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5179 if (!conn) { 5180 // notify client that alloc failed 5181 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5182 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5183 } 5184 conn->state = SEND_CREATE_CONNECTION; 5185 conn->role = HCI_ROLE_MASTER; 5186 } 5187 5188 conn->con_handle = HCI_CON_HANDLE_INVALID; 5189 conn->role = HCI_ROLE_INVALID; 5190 5191 log_info("conn state %u", conn->state); 5192 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5193 switch (conn->state) { 5194 // if connection active exists 5195 case OPEN: 5196 // and OPEN, emit connection complete command 5197 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5198 // packet not sent to controller 5199 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5200 case RECEIVED_DISCONNECTION_COMPLETE: 5201 // create connection triggered in disconnect complete event, let's do it now 5202 break; 5203 case SEND_CREATE_CONNECTION: 5204 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5205 break; 5206 default: 5207 // otherwise, just ignore as it is already in the open process 5208 // packet not sent to controller 5209 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5210 } 5211 conn->state = SENT_CREATE_CONNECTION; 5212 5213 // track outgoing connection 5214 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5215 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5216 break; 5217 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5218 if (hci_stack->link_key_db) { 5219 reverse_bd_addr(&packet[3], addr); 5220 hci_stack->link_key_db->delete_link_key(addr); 5221 } 5222 break; 5223 5224 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5225 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5226 // setup_synchronous_connection? Voice setting at offset 22 5227 // TODO: compare to current setting if sco connection already active 5228 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5229 break; 5230 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5231 // accept_synchronus_connection? Voice setting at offset 18 5232 // TODO: compare to current setting if sco connection already active 5233 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5234 break; 5235 #endif 5236 #endif 5237 5238 #ifdef ENABLE_BLE 5239 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5240 hci_stack->le_random_address_set = 1; 5241 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5242 break; 5243 #ifdef ENABLE_LE_PERIPHERAL 5244 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5245 hci_stack->le_advertisements_active = packet[3] != 0; 5246 break; 5247 #endif 5248 #ifdef ENABLE_LE_CENTRAL 5249 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5250 // white list used? 5251 initiator_filter_policy = packet[7]; 5252 switch (initiator_filter_policy) { 5253 case 0: 5254 // whitelist not used 5255 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5256 break; 5257 case 1: 5258 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5259 break; 5260 default: 5261 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5262 break; 5263 } 5264 // track outgoing connection 5265 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5266 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5267 break; 5268 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5269 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5270 break; 5271 #endif 5272 #endif 5273 default: 5274 break; 5275 } 5276 5277 hci_stack->num_cmd_packets--; 5278 5279 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5280 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5281 if (err != 0){ 5282 return ERROR_CODE_HARDWARE_FAILURE; 5283 } 5284 return ERROR_CODE_SUCCESS; 5285 } 5286 5287 // disconnect because of security block 5288 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5289 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5290 if (!connection) return; 5291 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5292 } 5293 5294 5295 // Configure Secure Simple Pairing 5296 5297 #ifdef ENABLE_CLASSIC 5298 5299 // enable will enable SSP during init 5300 void gap_ssp_set_enable(int enable){ 5301 hci_stack->ssp_enable = enable; 5302 } 5303 5304 static int hci_local_ssp_activated(void){ 5305 return gap_ssp_supported() && hci_stack->ssp_enable; 5306 } 5307 5308 // if set, BTstack will respond to io capability request using authentication requirement 5309 void gap_ssp_set_io_capability(int io_capability){ 5310 hci_stack->ssp_io_capability = io_capability; 5311 } 5312 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5313 hci_stack->ssp_authentication_requirement = authentication_requirement; 5314 } 5315 5316 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5317 void gap_ssp_set_auto_accept(int auto_accept){ 5318 hci_stack->ssp_auto_accept = auto_accept; 5319 } 5320 5321 void gap_secure_connections_enable(bool enable){ 5322 hci_stack->secure_connections_enable = enable; 5323 } 5324 5325 #endif 5326 5327 // va_list part of hci_send_cmd 5328 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5329 if (!hci_can_send_command_packet_now()){ 5330 log_error("hci_send_cmd called but cannot send packet now"); 5331 return ERROR_CODE_COMMAND_DISALLOWED; 5332 } 5333 5334 // for HCI INITIALIZATION 5335 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5336 hci_stack->last_cmd_opcode = cmd->opcode; 5337 5338 hci_reserve_packet_buffer(); 5339 uint8_t * packet = hci_stack->hci_packet_buffer; 5340 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5341 uint8_t status = hci_send_cmd_packet(packet, size); 5342 5343 // release packet buffer on error or for synchronous transport implementations 5344 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5345 hci_release_packet_buffer(); 5346 hci_emit_transport_packet_sent(); 5347 } 5348 5349 return status; 5350 } 5351 5352 /** 5353 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5354 */ 5355 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5356 va_list argptr; 5357 va_start(argptr, cmd); 5358 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5359 va_end(argptr); 5360 return status; 5361 } 5362 5363 // Create various non-HCI events. 5364 // TODO: generalize, use table similar to hci_create_command 5365 5366 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5367 // dump packet 5368 if (dump) { 5369 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5370 } 5371 5372 // dispatch to all event handlers 5373 btstack_linked_list_iterator_t it; 5374 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5375 while (btstack_linked_list_iterator_has_next(&it)){ 5376 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5377 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5378 } 5379 } 5380 5381 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5382 if (!hci_stack->acl_packet_handler) return; 5383 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5384 } 5385 5386 #ifdef ENABLE_CLASSIC 5387 static void hci_notify_if_sco_can_send_now(void){ 5388 // notify SCO sender if waiting 5389 if (!hci_stack->sco_waiting_for_can_send_now) return; 5390 if (hci_can_send_sco_packet_now()){ 5391 hci_stack->sco_waiting_for_can_send_now = 0; 5392 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5393 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5394 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5395 } 5396 } 5397 5398 // parsing end emitting has been merged to reduce code size 5399 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5400 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5401 5402 uint8_t * eir_data; 5403 ad_context_t context; 5404 const uint8_t * name; 5405 uint8_t name_len; 5406 5407 if (size < 3) return; 5408 5409 int event_type = hci_event_packet_get_type(packet); 5410 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5411 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5412 5413 switch (event_type){ 5414 case HCI_EVENT_INQUIRY_RESULT: 5415 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5416 if (size != (3 + (num_responses * 14))) return; 5417 break; 5418 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5419 if (size != 257) return; 5420 if (num_responses != 1) return; 5421 break; 5422 default: 5423 return; 5424 } 5425 5426 // event[1] is set at the end 5427 int i; 5428 for (i=0; i<num_responses;i++){ 5429 memset(event, 0, sizeof(event)); 5430 event[0] = GAP_EVENT_INQUIRY_RESULT; 5431 uint8_t event_size = 27; // if name is not set by EIR 5432 5433 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5434 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5435 (void)memcpy(&event[9], 5436 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5437 3); // class of device 5438 (void)memcpy(&event[12], 5439 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5440 2); // clock offset 5441 5442 switch (event_type){ 5443 case HCI_EVENT_INQUIRY_RESULT: 5444 // 14,15,16,17 = 0, size 18 5445 break; 5446 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5447 event[14] = 1; 5448 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5449 // 16,17 = 0, size 18 5450 break; 5451 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5452 event[14] = 1; 5453 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5454 // EIR packets only contain a single inquiry response 5455 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5456 name = NULL; 5457 // Iterate over EIR data 5458 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5459 uint8_t data_type = ad_iterator_get_data_type(&context); 5460 uint8_t data_size = ad_iterator_get_data_len(&context); 5461 const uint8_t * data = ad_iterator_get_data(&context); 5462 // Prefer Complete Local Name over Shortened Local Name 5463 switch (data_type){ 5464 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5465 if (name) continue; 5466 /* fall through */ 5467 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5468 name = data; 5469 name_len = data_size; 5470 break; 5471 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5472 if (data_size != 8) break; 5473 event[16] = 1; 5474 memcpy(&event[17], data, 8); 5475 break; 5476 default: 5477 break; 5478 } 5479 } 5480 if (name){ 5481 event[25] = 1; 5482 // truncate name if needed 5483 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5484 event[26] = len; 5485 (void)memcpy(&event[27], name, len); 5486 event_size += len; 5487 } 5488 break; 5489 default: 5490 return; 5491 } 5492 event[1] = event_size - 2; 5493 hci_emit_event(event, event_size, 1); 5494 } 5495 } 5496 #endif 5497 5498 void hci_emit_state(void){ 5499 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5500 uint8_t event[3]; 5501 event[0] = BTSTACK_EVENT_STATE; 5502 event[1] = sizeof(event) - 2u; 5503 event[2] = hci_stack->state; 5504 hci_emit_event(event, sizeof(event), 1); 5505 } 5506 5507 #ifdef ENABLE_CLASSIC 5508 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5509 uint8_t event[13]; 5510 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5511 event[1] = sizeof(event) - 2; 5512 event[2] = status; 5513 little_endian_store_16(event, 3, con_handle); 5514 reverse_bd_addr(address, &event[5]); 5515 event[11] = 1; // ACL connection 5516 event[12] = 0; // encryption disabled 5517 hci_emit_event(event, sizeof(event), 1); 5518 } 5519 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5520 if (disable_l2cap_timeouts) return; 5521 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5522 uint8_t event[4]; 5523 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5524 event[1] = sizeof(event) - 2; 5525 little_endian_store_16(event, 2, conn->con_handle); 5526 hci_emit_event(event, sizeof(event), 1); 5527 } 5528 #endif 5529 5530 #ifdef ENABLE_BLE 5531 #ifdef ENABLE_LE_CENTRAL 5532 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){ 5533 uint8_t event[21]; 5534 event[0] = HCI_EVENT_LE_META; 5535 event[1] = sizeof(event) - 2u; 5536 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5537 event[3] = status; 5538 little_endian_store_16(event, 4, con_handle); 5539 event[6] = 0; // TODO: role 5540 event[7] = address_type; 5541 reverse_bd_addr(address, &event[8]); 5542 little_endian_store_16(event, 14, 0); // interval 5543 little_endian_store_16(event, 16, 0); // latency 5544 little_endian_store_16(event, 18, 0); // supervision timeout 5545 event[20] = 0; // master clock accuracy 5546 hci_emit_event(event, sizeof(event), 1); 5547 } 5548 #endif 5549 #endif 5550 5551 static void hci_emit_transport_packet_sent(void){ 5552 // notify upper stack that it might be possible to send again 5553 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5554 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5555 } 5556 5557 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5558 uint8_t event[6]; 5559 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5560 event[1] = sizeof(event) - 2u; 5561 event[2] = 0; // status = OK 5562 little_endian_store_16(event, 3, con_handle); 5563 event[5] = reason; 5564 hci_emit_event(event, sizeof(event), 1); 5565 } 5566 5567 static void hci_emit_nr_connections_changed(void){ 5568 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5569 uint8_t event[3]; 5570 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5571 event[1] = sizeof(event) - 2u; 5572 event[2] = nr_hci_connections(); 5573 hci_emit_event(event, sizeof(event), 1); 5574 } 5575 5576 static void hci_emit_hci_open_failed(void){ 5577 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5578 uint8_t event[2]; 5579 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5580 event[1] = sizeof(event) - 2u; 5581 hci_emit_event(event, sizeof(event), 1); 5582 } 5583 5584 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5585 log_info("hci_emit_dedicated_bonding_result %u ", status); 5586 uint8_t event[9]; 5587 int pos = 0; 5588 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5589 event[pos++] = sizeof(event) - 2u; 5590 event[pos++] = status; 5591 reverse_bd_addr(address, &event[pos]); 5592 hci_emit_event(event, sizeof(event), 1); 5593 } 5594 5595 5596 #ifdef ENABLE_CLASSIC 5597 5598 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5599 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5600 uint8_t event[5]; 5601 int pos = 0; 5602 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5603 event[pos++] = sizeof(event) - 2; 5604 little_endian_store_16(event, 2, con_handle); 5605 pos += 2; 5606 event[pos++] = level; 5607 hci_emit_event(event, sizeof(event), 1); 5608 } 5609 5610 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5611 if (!connection) return LEVEL_0; 5612 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5613 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5614 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5615 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5616 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5617 // LEVEL 4 always requires 128 bit encrytion key size 5618 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5619 security_level = LEVEL_3; 5620 } 5621 return security_level; 5622 } 5623 5624 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5625 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5626 uint8_t event[3]; 5627 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5628 event[1] = sizeof(event) - 2; 5629 event[2] = enabled; 5630 hci_emit_event(event, sizeof(event), 1); 5631 } 5632 5633 // query if remote side supports eSCO 5634 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5635 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5636 if (!connection) return false; 5637 return (connection->remote_supported_features[0] & 1) != 0; 5638 } 5639 5640 static bool hci_ssp_supported(hci_connection_t * connection){ 5641 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5642 return (connection->bonding_flags & mask) == mask; 5643 } 5644 5645 // query if remote side supports SSP 5646 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5647 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5648 if (!connection) return false; 5649 return hci_ssp_supported(connection) ? 1 : 0; 5650 } 5651 5652 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5653 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5654 } 5655 5656 // GAP API 5657 /** 5658 * @bbrief enable/disable bonding. default is enabled 5659 * @praram enabled 5660 */ 5661 void gap_set_bondable_mode(int enable){ 5662 hci_stack->bondable = enable ? 1 : 0; 5663 } 5664 /** 5665 * @brief Get bondable mode. 5666 * @return 1 if bondable 5667 */ 5668 int gap_get_bondable_mode(void){ 5669 return hci_stack->bondable; 5670 } 5671 5672 /** 5673 * @brief map link keys to security levels 5674 */ 5675 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5676 switch (link_key_type){ 5677 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5678 return LEVEL_4; 5679 case COMBINATION_KEY: 5680 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5681 return LEVEL_3; 5682 default: 5683 return LEVEL_2; 5684 } 5685 } 5686 5687 /** 5688 * @brief map link keys to secure connection yes/no 5689 */ 5690 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5691 switch (link_key_type){ 5692 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5693 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5694 return 1; 5695 default: 5696 return 0; 5697 } 5698 } 5699 5700 /** 5701 * @brief map link keys to authenticated 5702 */ 5703 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5704 switch (link_key_type){ 5705 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5706 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5707 return 1; 5708 default: 5709 return 0; 5710 } 5711 } 5712 5713 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5714 log_info("gap_mitm_protection_required_for_security_level %u", level); 5715 return level > LEVEL_2; 5716 } 5717 5718 /** 5719 * @brief get current security level 5720 */ 5721 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5722 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5723 if (!connection) return LEVEL_0; 5724 return gap_security_level_for_connection(connection); 5725 } 5726 5727 /** 5728 * @brief request connection to device to 5729 * @result GAP_AUTHENTICATION_RESULT 5730 */ 5731 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5732 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5733 if (!connection){ 5734 hci_emit_security_level(con_handle, LEVEL_0); 5735 return; 5736 } 5737 5738 btstack_assert(hci_is_le_connection(connection) == false); 5739 5740 // 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) 5741 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5742 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5743 requested_level = LEVEL_4; 5744 } 5745 5746 gap_security_level_t current_level = gap_security_level(con_handle); 5747 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5748 requested_level, connection->requested_security_level, current_level); 5749 5750 // authentication active if authentication request was sent or planned level > 0 5751 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5752 if (authentication_active){ 5753 // authentication already active 5754 if (connection->requested_security_level < requested_level){ 5755 // increase requested level as new level is higher 5756 // TODO: handle re-authentication when done 5757 connection->requested_security_level = requested_level; 5758 } 5759 } else { 5760 // no request active, notify if security sufficient 5761 if (requested_level <= current_level){ 5762 hci_emit_security_level(con_handle, current_level); 5763 return; 5764 } 5765 5766 // store request 5767 connection->requested_security_level = requested_level; 5768 5769 // start to authenticate connection 5770 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5771 hci_run(); 5772 } 5773 } 5774 5775 /** 5776 * @brief start dedicated bonding with device. disconnect after bonding 5777 * @param device 5778 * @param request MITM protection 5779 * @result GAP_DEDICATED_BONDING_COMPLETE 5780 */ 5781 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5782 5783 // create connection state machine 5784 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5785 5786 if (!connection){ 5787 return BTSTACK_MEMORY_ALLOC_FAILED; 5788 } 5789 5790 // delete linkn key 5791 gap_drop_link_key_for_bd_addr(device); 5792 5793 // configure LEVEL_2/3, dedicated bonding 5794 connection->state = SEND_CREATE_CONNECTION; 5795 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5796 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5797 connection->bonding_flags = BONDING_DEDICATED; 5798 5799 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5800 5801 // handle: connnection failure (connection complete != ok) 5802 // handle: authentication failure 5803 // handle: disconnect on done 5804 5805 hci_run(); 5806 5807 return 0; 5808 } 5809 5810 void gap_set_local_name(const char * local_name){ 5811 hci_stack->local_name = local_name; 5812 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5813 // also update EIR if not set by user 5814 if (hci_stack->eir_data == NULL){ 5815 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5816 } 5817 hci_run(); 5818 } 5819 #endif 5820 5821 5822 #ifdef ENABLE_BLE 5823 5824 #ifdef ENABLE_LE_CENTRAL 5825 void gap_start_scan(void){ 5826 hci_stack->le_scanning_enabled = true; 5827 hci_run(); 5828 } 5829 5830 void gap_stop_scan(void){ 5831 hci_stack->le_scanning_enabled = false; 5832 hci_run(); 5833 } 5834 5835 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5836 hci_stack->le_scan_type = scan_type; 5837 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5838 hci_stack->le_scan_interval = scan_interval; 5839 hci_stack->le_scan_window = scan_window; 5840 hci_stack->le_scanning_param_update = true; 5841 hci_run(); 5842 } 5843 5844 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5845 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5846 } 5847 5848 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5849 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5850 if (!conn){ 5851 // disallow if le connection is already outgoing 5852 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5853 log_error("le connection already active"); 5854 return ERROR_CODE_COMMAND_DISALLOWED; 5855 } 5856 5857 log_info("gap_connect: no connection exists yet, creating context"); 5858 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5859 if (!conn){ 5860 // notify client that alloc failed 5861 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5862 log_info("gap_connect: failed to alloc hci_connection_t"); 5863 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5864 } 5865 5866 // set le connecting state 5867 if (hci_is_le_connection_type(addr_type)){ 5868 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5869 } 5870 5871 conn->state = SEND_CREATE_CONNECTION; 5872 log_info("gap_connect: send create connection next"); 5873 hci_run(); 5874 return ERROR_CODE_SUCCESS; 5875 } 5876 5877 if (!hci_is_le_connection(conn) || 5878 (conn->state == SEND_CREATE_CONNECTION) || 5879 (conn->state == SENT_CREATE_CONNECTION)) { 5880 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5881 log_error("gap_connect: classic connection or connect is already being created"); 5882 return GATT_CLIENT_IN_WRONG_STATE; 5883 } 5884 5885 // check if connection was just disconnected 5886 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5887 log_info("gap_connect: send create connection (again)"); 5888 conn->state = SEND_CREATE_CONNECTION; 5889 hci_run(); 5890 return ERROR_CODE_SUCCESS; 5891 } 5892 5893 log_info("gap_connect: context exists with state %u", conn->state); 5894 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5895 hci_run(); 5896 return ERROR_CODE_SUCCESS; 5897 } 5898 5899 // @assumption: only a single outgoing LE Connection exists 5900 static hci_connection_t * gap_get_outgoing_connection(void){ 5901 btstack_linked_item_t *it; 5902 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5903 hci_connection_t * conn = (hci_connection_t *) it; 5904 if (!hci_is_le_connection(conn)) continue; 5905 switch (conn->state){ 5906 case SEND_CREATE_CONNECTION: 5907 case SENT_CREATE_CONNECTION: 5908 case SENT_CANCEL_CONNECTION: 5909 return conn; 5910 default: 5911 break; 5912 }; 5913 } 5914 return NULL; 5915 } 5916 5917 uint8_t gap_connect_cancel(void){ 5918 hci_connection_t * conn = gap_get_outgoing_connection(); 5919 if (!conn) return 0; 5920 switch (conn->state){ 5921 case SEND_CREATE_CONNECTION: 5922 // skip sending create connection and emit event instead 5923 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5924 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5925 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5926 btstack_memory_hci_connection_free( conn ); 5927 break; 5928 case SENT_CREATE_CONNECTION: 5929 // request to send cancel connection 5930 conn->state = SEND_CANCEL_CONNECTION; 5931 hci_run(); 5932 break; 5933 default: 5934 break; 5935 } 5936 return 0; 5937 } 5938 #endif 5939 5940 #ifdef ENABLE_LE_CENTRAL 5941 /** 5942 * @brief Set connection parameters for outgoing connections 5943 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5944 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5945 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5946 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5947 * @param conn_latency, default: 4 5948 * @param supervision_timeout (unit: 10ms), default: 720 ms 5949 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5950 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5951 */ 5952 5953 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5954 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5955 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5956 hci_stack->le_connection_scan_interval = conn_scan_interval; 5957 hci_stack->le_connection_scan_window = conn_scan_window; 5958 hci_stack->le_connection_interval_min = conn_interval_min; 5959 hci_stack->le_connection_interval_max = conn_interval_max; 5960 hci_stack->le_connection_latency = conn_latency; 5961 hci_stack->le_supervision_timeout = supervision_timeout; 5962 hci_stack->le_minimum_ce_length = min_ce_length; 5963 hci_stack->le_maximum_ce_length = max_ce_length; 5964 } 5965 #endif 5966 5967 /** 5968 * @brief Updates the connection parameters for a given LE connection 5969 * @param handle 5970 * @param conn_interval_min (unit: 1.25ms) 5971 * @param conn_interval_max (unit: 1.25ms) 5972 * @param conn_latency 5973 * @param supervision_timeout (unit: 10ms) 5974 * @returns 0 if ok 5975 */ 5976 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5977 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5978 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5979 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5980 connection->le_conn_interval_min = conn_interval_min; 5981 connection->le_conn_interval_max = conn_interval_max; 5982 connection->le_conn_latency = conn_latency; 5983 connection->le_supervision_timeout = supervision_timeout; 5984 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5985 hci_run(); 5986 return 0; 5987 } 5988 5989 /** 5990 * @brief Request an update of the connection parameter for a given LE connection 5991 * @param handle 5992 * @param conn_interval_min (unit: 1.25ms) 5993 * @param conn_interval_max (unit: 1.25ms) 5994 * @param conn_latency 5995 * @param supervision_timeout (unit: 10ms) 5996 * @returns 0 if ok 5997 */ 5998 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5999 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6000 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6001 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6002 connection->le_conn_interval_min = conn_interval_min; 6003 connection->le_conn_interval_max = conn_interval_max; 6004 connection->le_conn_latency = conn_latency; 6005 connection->le_supervision_timeout = supervision_timeout; 6006 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6007 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6008 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6009 return 0; 6010 } 6011 6012 #ifdef ENABLE_LE_PERIPHERAL 6013 6014 /** 6015 * @brief Set Advertisement Data 6016 * @param advertising_data_length 6017 * @param advertising_data (max 31 octets) 6018 * @note data is not copied, pointer has to stay valid 6019 */ 6020 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6021 hci_stack->le_advertisements_data_len = advertising_data_length; 6022 hci_stack->le_advertisements_data = advertising_data; 6023 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6024 hci_run(); 6025 } 6026 6027 /** 6028 * @brief Set Scan Response Data 6029 * @param advertising_data_length 6030 * @param advertising_data (max 31 octets) 6031 * @note data is not copied, pointer has to stay valid 6032 */ 6033 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6034 hci_stack->le_scan_response_data_len = scan_response_data_length; 6035 hci_stack->le_scan_response_data = scan_response_data; 6036 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6037 hci_run(); 6038 } 6039 6040 /** 6041 * @brief Set Advertisement Parameters 6042 * @param adv_int_min 6043 * @param adv_int_max 6044 * @param adv_type 6045 * @param direct_address_type 6046 * @param direct_address 6047 * @param channel_map 6048 * @param filter_policy 6049 * 6050 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6051 */ 6052 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6053 uint8_t direct_address_typ, bd_addr_t direct_address, 6054 uint8_t channel_map, uint8_t filter_policy) { 6055 6056 hci_stack->le_advertisements_interval_min = adv_int_min; 6057 hci_stack->le_advertisements_interval_max = adv_int_max; 6058 hci_stack->le_advertisements_type = adv_type; 6059 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6060 hci_stack->le_advertisements_channel_map = channel_map; 6061 hci_stack->le_advertisements_filter_policy = filter_policy; 6062 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6063 6); 6064 6065 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6066 hci_run(); 6067 } 6068 6069 /** 6070 * @brief Enable/Disable Advertisements 6071 * @param enabled 6072 */ 6073 void gap_advertisements_enable(int enabled){ 6074 hci_stack->le_advertisements_enabled = enabled != 0; 6075 hci_update_advertisements_enabled_for_current_roles(); 6076 hci_run(); 6077 } 6078 6079 #endif 6080 6081 void hci_le_set_own_address_type(uint8_t own_address_type){ 6082 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6083 if (own_address_type == hci_stack->le_own_addr_type) return; 6084 hci_stack->le_own_addr_type = own_address_type; 6085 6086 #ifdef ENABLE_LE_PERIPHERAL 6087 // update advertisement parameters, too 6088 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6089 hci_run(); 6090 #endif 6091 #ifdef ENABLE_LE_CENTRAL 6092 // note: we don't update scan parameters or modify ongoing connection attempts 6093 #endif 6094 } 6095 6096 #endif 6097 6098 uint8_t gap_disconnect(hci_con_handle_t handle){ 6099 hci_connection_t * conn = hci_connection_for_handle(handle); 6100 if (!conn){ 6101 hci_emit_disconnection_complete(handle, 0); 6102 return 0; 6103 } 6104 // ignore if already disconnected 6105 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6106 return 0; 6107 } 6108 conn->state = SEND_DISCONNECT; 6109 hci_run(); 6110 return 0; 6111 } 6112 6113 int gap_read_rssi(hci_con_handle_t con_handle){ 6114 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6115 if (hci_connection == NULL) return 0; 6116 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6117 hci_run(); 6118 return 1; 6119 } 6120 6121 /** 6122 * @brief Get connection type 6123 * @param con_handle 6124 * @result connection_type 6125 */ 6126 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6127 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6128 if (!conn) return GAP_CONNECTION_INVALID; 6129 switch (conn->address_type){ 6130 case BD_ADDR_TYPE_LE_PUBLIC: 6131 case BD_ADDR_TYPE_LE_RANDOM: 6132 return GAP_CONNECTION_LE; 6133 case BD_ADDR_TYPE_SCO: 6134 return GAP_CONNECTION_SCO; 6135 case BD_ADDR_TYPE_ACL: 6136 return GAP_CONNECTION_ACL; 6137 default: 6138 return GAP_CONNECTION_INVALID; 6139 } 6140 } 6141 6142 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6143 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6144 if (!conn) return HCI_ROLE_INVALID; 6145 return (hci_role_t) conn->role; 6146 } 6147 6148 6149 #ifdef ENABLE_CLASSIC 6150 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6151 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6152 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6153 conn->request_role = role; 6154 hci_run(); 6155 return ERROR_CODE_SUCCESS; 6156 } 6157 #endif 6158 6159 #ifdef ENABLE_BLE 6160 6161 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){ 6162 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6163 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6164 6165 conn->le_phy_update_all_phys = all_phys; 6166 conn->le_phy_update_tx_phys = tx_phys; 6167 conn->le_phy_update_rx_phys = rx_phys; 6168 conn->le_phy_update_phy_options = phy_options; 6169 6170 hci_run(); 6171 6172 return 0; 6173 } 6174 6175 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6176 // check if already in list 6177 btstack_linked_list_iterator_t it; 6178 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6179 while (btstack_linked_list_iterator_has_next(&it)) { 6180 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6181 if (entry->address_type != address_type) { 6182 continue; 6183 } 6184 if (memcmp(entry->address, address, 6) != 0) { 6185 continue; 6186 } 6187 // disallow if already scheduled to add 6188 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6189 return ERROR_CODE_COMMAND_DISALLOWED; 6190 } 6191 // still on controller, but scheduled to remove -> re-add 6192 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6193 return ERROR_CODE_SUCCESS; 6194 } 6195 // alloc and add to list 6196 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6197 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6198 entry->address_type = address_type; 6199 (void)memcpy(entry->address, address, 6); 6200 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6201 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6202 return ERROR_CODE_SUCCESS; 6203 } 6204 6205 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6206 btstack_linked_list_iterator_t it; 6207 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6208 while (btstack_linked_list_iterator_has_next(&it)){ 6209 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6210 if (entry->address_type != address_type) { 6211 continue; 6212 } 6213 if (memcmp(entry->address, address, 6) != 0) { 6214 continue; 6215 } 6216 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6217 // remove from controller if already present 6218 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6219 } else { 6220 // directly remove entry from whitelist 6221 btstack_linked_list_iterator_remove(&it); 6222 btstack_memory_whitelist_entry_free(entry); 6223 } 6224 return ERROR_CODE_SUCCESS; 6225 } 6226 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6227 } 6228 6229 static void hci_whitelist_clear(void){ 6230 btstack_linked_list_iterator_t it; 6231 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6232 while (btstack_linked_list_iterator_has_next(&it)){ 6233 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6234 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6235 // remove from controller if already present 6236 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6237 continue; 6238 } 6239 // directly remove entry from whitelist 6240 btstack_linked_list_iterator_remove(&it); 6241 btstack_memory_whitelist_entry_free(entry); 6242 } 6243 } 6244 6245 /** 6246 * @brief Clear Whitelist 6247 * @returns 0 if ok 6248 */ 6249 uint8_t gap_whitelist_clear(void){ 6250 hci_whitelist_clear(); 6251 hci_run(); 6252 return ERROR_CODE_SUCCESS; 6253 } 6254 6255 /** 6256 * @brief Add Device to Whitelist 6257 * @param address_typ 6258 * @param address 6259 * @returns 0 if ok 6260 */ 6261 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6262 uint8_t status = hci_whitelist_add(address_type, address); 6263 if (status){ 6264 return status; 6265 } 6266 hci_run(); 6267 return ERROR_CODE_SUCCESS; 6268 } 6269 6270 /** 6271 * @brief Remove Device from Whitelist 6272 * @param address_typ 6273 * @param address 6274 * @returns 0 if ok 6275 */ 6276 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6277 uint8_t status = hci_whitelist_remove(address_type, address); 6278 if (status){ 6279 return status; 6280 } 6281 hci_run(); 6282 return ERROR_CODE_SUCCESS; 6283 } 6284 6285 #ifdef ENABLE_LE_CENTRAL 6286 /** 6287 * @brief Connect with Whitelist 6288 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6289 * @returns - if ok 6290 */ 6291 uint8_t gap_connect_with_whitelist(void){ 6292 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6293 return ERROR_CODE_COMMAND_DISALLOWED; 6294 } 6295 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6296 hci_run(); 6297 return ERROR_CODE_SUCCESS; 6298 } 6299 6300 /** 6301 * @brief Auto Connection Establishment - Start Connecting to device 6302 * @param address_typ 6303 * @param address 6304 * @returns 0 if ok 6305 */ 6306 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6307 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6308 return ERROR_CODE_COMMAND_DISALLOWED; 6309 } 6310 6311 uint8_t status = hci_whitelist_add(address_type, address); 6312 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6313 return status; 6314 } 6315 6316 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6317 6318 hci_run(); 6319 return ERROR_CODE_SUCCESS; 6320 } 6321 6322 /** 6323 * @brief Auto Connection Establishment - Stop Connecting to device 6324 * @param address_typ 6325 * @param address 6326 * @returns 0 if ok 6327 */ 6328 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6329 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6330 return ERROR_CODE_COMMAND_DISALLOWED; 6331 } 6332 6333 hci_whitelist_remove(address_type, address); 6334 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6335 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6336 } 6337 hci_run(); 6338 return 0; 6339 } 6340 6341 /** 6342 * @brief Auto Connection Establishment - Stop everything 6343 * @note Convenience function to stop all active auto connection attempts 6344 */ 6345 uint8_t gap_auto_connection_stop_all(void){ 6346 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6347 return ERROR_CODE_COMMAND_DISALLOWED; 6348 } 6349 hci_whitelist_clear(); 6350 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6351 hci_run(); 6352 return ERROR_CODE_SUCCESS; 6353 } 6354 6355 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6356 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6357 if (!conn) return 0; 6358 return conn->le_connection_interval; 6359 } 6360 #endif 6361 #endif 6362 6363 #ifdef ENABLE_CLASSIC 6364 /** 6365 * @brief Set Extended Inquiry Response data 6366 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6367 * @note has to be done before stack starts up 6368 */ 6369 void gap_set_extended_inquiry_response(const uint8_t * data){ 6370 hci_stack->eir_data = data; 6371 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6372 hci_run(); 6373 } 6374 6375 /** 6376 * @brief Start GAP Classic Inquiry 6377 * @param duration in 1.28s units 6378 * @return 0 if ok 6379 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6380 */ 6381 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6382 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6383 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6384 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6385 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6386 } 6387 hci_stack->inquiry_state = duration_in_1280ms_units; 6388 hci_run(); 6389 return 0; 6390 } 6391 6392 /** 6393 * @brief Stop GAP Classic Inquiry 6394 * @returns 0 if ok 6395 */ 6396 int gap_inquiry_stop(void){ 6397 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6398 // emit inquiry complete event, before it even started 6399 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6400 hci_emit_event(event, sizeof(event), 1); 6401 return 0; 6402 } 6403 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6404 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6405 hci_run(); 6406 return 0; 6407 } 6408 6409 void gap_inquiry_set_lap(uint32_t lap){ 6410 hci_stack->inquiry_lap = lap; 6411 } 6412 6413 6414 /** 6415 * @brief Remote Name Request 6416 * @param addr 6417 * @param page_scan_repetition_mode 6418 * @param clock_offset only used when bit 15 is set 6419 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6420 */ 6421 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6422 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6423 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6424 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6425 hci_stack->remote_name_clock_offset = clock_offset; 6426 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6427 hci_run(); 6428 return 0; 6429 } 6430 6431 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6432 hci_stack->gap_pairing_state = state; 6433 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6434 hci_run(); 6435 return 0; 6436 } 6437 6438 /** 6439 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6440 * @param addr 6441 * @param pin_data 6442 * @param pin_len 6443 * @return 0 if ok 6444 */ 6445 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6446 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6447 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6448 hci_stack->gap_pairing_pin_len = pin_len; 6449 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6450 } 6451 6452 /** 6453 * @brief Legacy Pairing Pin Code Response 6454 * @param addr 6455 * @param pin 6456 * @return 0 if ok 6457 */ 6458 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6459 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6460 } 6461 6462 /** 6463 * @brief Abort Legacy Pairing 6464 * @param addr 6465 * @param pin 6466 * @return 0 if ok 6467 */ 6468 int gap_pin_code_negative(bd_addr_t addr){ 6469 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6470 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6471 } 6472 6473 /** 6474 * @brief SSP Passkey Response 6475 * @param addr 6476 * @param passkey 6477 * @return 0 if ok 6478 */ 6479 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6480 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6481 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6482 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6483 } 6484 6485 /** 6486 * @brief Abort SSP Passkey Entry/Pairing 6487 * @param addr 6488 * @param pin 6489 * @return 0 if ok 6490 */ 6491 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6492 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6493 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6494 } 6495 6496 /** 6497 * @brief Accept SSP Numeric Comparison 6498 * @param addr 6499 * @param passkey 6500 * @return 0 if ok 6501 */ 6502 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6503 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6504 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6505 } 6506 6507 /** 6508 * @brief Abort SSP Numeric Comparison/Pairing 6509 * @param addr 6510 * @param pin 6511 * @return 0 if ok 6512 */ 6513 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6514 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6515 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6516 } 6517 6518 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6519 6520 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6521 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6522 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6523 connectionSetAuthenticationFlags(conn, flag); 6524 hci_run(); 6525 return ERROR_CODE_SUCCESS; 6526 } 6527 6528 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6529 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6530 } 6531 6532 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6533 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6534 } 6535 #endif 6536 6537 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6538 /** 6539 * @brief Report Remote OOB Data 6540 * @param bd_addr 6541 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6542 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6543 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6544 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6545 */ 6546 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){ 6547 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6548 if (connection == NULL) { 6549 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6550 } 6551 connection->classic_oob_c_192 = c_192; 6552 connection->classic_oob_r_192 = r_192; 6553 6554 // ignore P-256 if not supported by us 6555 if (hci_stack->secure_connections_active){ 6556 connection->classic_oob_c_256 = c_256; 6557 connection->classic_oob_r_256 = r_256; 6558 } 6559 6560 return ERROR_CODE_SUCCESS; 6561 } 6562 /** 6563 * @brief Generate new OOB data 6564 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6565 */ 6566 void gap_ssp_generate_oob_data(void){ 6567 hci_stack->classic_read_local_oob_data = true; 6568 hci_run(); 6569 } 6570 6571 #endif 6572 6573 /** 6574 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6575 * @param inquiry_mode see bluetooth_defines.h 6576 */ 6577 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6578 hci_stack->inquiry_mode = inquiry_mode; 6579 } 6580 6581 /** 6582 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6583 */ 6584 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6585 hci_stack->sco_voice_setting = voice_setting; 6586 } 6587 6588 /** 6589 * @brief Get SCO Voice Setting 6590 * @return current voice setting 6591 */ 6592 uint16_t hci_get_sco_voice_setting(void){ 6593 return hci_stack->sco_voice_setting; 6594 } 6595 6596 static int hci_have_usb_transport(void){ 6597 if (!hci_stack->hci_transport) return 0; 6598 const char * transport_name = hci_stack->hci_transport->name; 6599 if (!transport_name) return 0; 6600 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6601 } 6602 6603 /** @brief Get SCO packet length for current SCO Voice setting 6604 * @note Using SCO packets of the exact length is required for USB transfer 6605 * @return Length of SCO packets in bytes (not audio frames) 6606 */ 6607 uint16_t hci_get_sco_packet_length(void){ 6608 uint16_t sco_packet_length = 0; 6609 6610 #ifdef ENABLE_SCO_OVER_HCI 6611 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6612 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6613 6614 if (hci_have_usb_transport()){ 6615 // see Core Spec for H2 USB Transfer. 6616 // 3 byte SCO header + 24 bytes per connection 6617 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6618 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6619 } else { 6620 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6621 sco_packet_length = 3 + 60 * multiplier; 6622 // assert that it still fits inside an SCO buffer 6623 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6624 sco_packet_length = 3 + 60; 6625 } 6626 } 6627 #endif 6628 6629 #ifdef HAVE_SCO_TRANSPORT 6630 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6631 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6632 sco_packet_length = 3 + 60 * multiplier; 6633 #endif 6634 return sco_packet_length; 6635 } 6636 6637 /** 6638 * @brief Sets the master/slave policy 6639 * @param policy (0: attempt to become master, 1: let connecting device decide) 6640 */ 6641 void hci_set_master_slave_policy(uint8_t policy){ 6642 hci_stack->master_slave_policy = policy; 6643 } 6644 6645 #endif 6646 6647 HCI_STATE hci_get_state(void){ 6648 return hci_stack->state; 6649 } 6650 6651 #ifdef ENABLE_CLASSIC 6652 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6653 hci_stack->gap_classic_accept_callback = accept_callback; 6654 } 6655 #endif 6656 6657 /** 6658 * @brief Set callback for Bluetooth Hardware Error 6659 */ 6660 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6661 hci_stack->hardware_error_callback = fn; 6662 } 6663 6664 void hci_disconnect_all(void){ 6665 btstack_linked_list_iterator_t it; 6666 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6667 while (btstack_linked_list_iterator_has_next(&it)){ 6668 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6669 if (con->state == SENT_DISCONNECT) continue; 6670 con->state = SEND_DISCONNECT; 6671 } 6672 hci_run(); 6673 } 6674 6675 uint16_t hci_get_manufacturer(void){ 6676 return hci_stack->manufacturer; 6677 } 6678 6679 #ifdef ENABLE_BLE 6680 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6681 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6682 if (!hci_con) return NULL; 6683 return &hci_con->sm_connection; 6684 } 6685 6686 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6687 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6688 #endif 6689 6690 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6691 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6692 if (hci_connection == NULL) return 0; 6693 if (hci_is_le_connection(hci_connection)){ 6694 #ifdef ENABLE_BLE 6695 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6696 if (sm_conn->sm_connection_encrypted) { 6697 return sm_conn->sm_actual_encryption_key_size; 6698 } 6699 #endif 6700 } else { 6701 #ifdef ENABLE_CLASSIC 6702 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6703 return hci_connection->encryption_key_size; 6704 } 6705 #endif 6706 } 6707 return 0; 6708 } 6709 6710 int gap_authenticated(hci_con_handle_t con_handle){ 6711 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6712 if (hci_connection == NULL) return 0; 6713 6714 switch (hci_connection->address_type){ 6715 #ifdef ENABLE_BLE 6716 case BD_ADDR_TYPE_LE_PUBLIC: 6717 case BD_ADDR_TYPE_LE_RANDOM: 6718 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6719 return hci_connection->sm_connection.sm_connection_authenticated; 6720 #endif 6721 #ifdef ENABLE_CLASSIC 6722 case BD_ADDR_TYPE_SCO: 6723 case BD_ADDR_TYPE_ACL: 6724 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6725 #endif 6726 default: 6727 return 0; 6728 } 6729 } 6730 6731 int gap_secure_connection(hci_con_handle_t con_handle){ 6732 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6733 if (hci_connection == NULL) return 0; 6734 6735 switch (hci_connection->address_type){ 6736 #ifdef ENABLE_BLE 6737 case BD_ADDR_TYPE_LE_PUBLIC: 6738 case BD_ADDR_TYPE_LE_RANDOM: 6739 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6740 return hci_connection->sm_connection.sm_connection_sc; 6741 #endif 6742 #ifdef ENABLE_CLASSIC 6743 case BD_ADDR_TYPE_SCO: 6744 case BD_ADDR_TYPE_ACL: 6745 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6746 #endif 6747 default: 6748 return 0; 6749 } 6750 } 6751 6752 bool gap_bonded(hci_con_handle_t con_handle){ 6753 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6754 if (hci_connection == NULL) return 0; 6755 6756 #ifdef ENABLE_CLASSIC 6757 link_key_t link_key; 6758 link_key_type_t link_key_type; 6759 #endif 6760 switch (hci_connection->address_type){ 6761 #ifdef ENABLE_BLE 6762 case BD_ADDR_TYPE_LE_PUBLIC: 6763 case BD_ADDR_TYPE_LE_RANDOM: 6764 return hci_connection->sm_connection.sm_le_db_index >= 0; 6765 #endif 6766 #ifdef ENABLE_CLASSIC 6767 case BD_ADDR_TYPE_SCO: 6768 case BD_ADDR_TYPE_ACL: 6769 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6770 #endif 6771 default: 6772 return false; 6773 } 6774 } 6775 6776 #ifdef ENABLE_BLE 6777 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6778 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6779 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6780 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6781 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6782 return sm_conn->sm_connection_authorization_state; 6783 } 6784 #endif 6785 6786 #ifdef ENABLE_CLASSIC 6787 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){ 6788 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6789 if (!conn) return GAP_CONNECTION_INVALID; 6790 conn->sniff_min_interval = sniff_min_interval; 6791 conn->sniff_max_interval = sniff_max_interval; 6792 conn->sniff_attempt = sniff_attempt; 6793 conn->sniff_timeout = sniff_timeout; 6794 hci_run(); 6795 return 0; 6796 } 6797 6798 /** 6799 * @brief Exit Sniff mode 6800 * @param con_handle 6801 @ @return 0 if ok 6802 */ 6803 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6805 if (!conn) return GAP_CONNECTION_INVALID; 6806 conn->sniff_min_interval = 0xffff; 6807 hci_run(); 6808 return 0; 6809 } 6810 6811 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){ 6812 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6813 if (!conn) return GAP_CONNECTION_INVALID; 6814 conn->sniff_subrating_max_latency = max_latency; 6815 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6816 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6817 hci_run(); 6818 return ERROR_CODE_SUCCESS; 6819 } 6820 6821 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){ 6822 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6823 if (!conn) return GAP_CONNECTION_INVALID; 6824 conn->qos_service_type = service_type; 6825 conn->qos_token_rate = token_rate; 6826 conn->qos_peak_bandwidth = peak_bandwidth; 6827 conn->qos_latency = latency; 6828 conn->qos_delay_variation = delay_variation; 6829 hci_run(); 6830 return ERROR_CODE_SUCCESS; 6831 } 6832 6833 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6834 hci_stack->new_page_scan_interval = page_scan_interval; 6835 hci_stack->new_page_scan_window = page_scan_window; 6836 hci_run(); 6837 } 6838 6839 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6840 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6841 hci_run(); 6842 } 6843 6844 #endif 6845 6846 void hci_halting_defer(void){ 6847 if (hci_stack->state != HCI_STATE_HALTING) return; 6848 switch (hci_stack->substate){ 6849 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6850 case HCI_HALTING_CLOSE: 6851 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6852 break; 6853 default: 6854 break; 6855 } 6856 } 6857 6858 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6859 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6860 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6861 if (le_device_db_index >= le_device_db_max_count()) return; 6862 uint8_t offset = le_device_db_index >> 3; 6863 uint8_t mask = 1 << (le_device_db_index & 7); 6864 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6865 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6866 // note: go back to remove entries, otherwise, a remove + add will skip the add 6867 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6868 } 6869 } 6870 6871 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6872 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6873 if (le_device_db_index >= le_device_db_max_count()) return; 6874 uint8_t offset = le_device_db_index >> 3; 6875 uint8_t mask = 1 << (le_device_db_index & 7); 6876 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6877 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6878 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6879 } 6880 } 6881 6882 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6883 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6884 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6885 } 6886 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6887 // restart le resolving list update 6888 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6889 } 6890 return ERROR_CODE_SUCCESS; 6891 } 6892 #endif 6893 6894 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6895 void hci_setup_test_connections_fuzz(void){ 6896 hci_connection_t * conn; 6897 6898 // default address: 66:55:44:33:00:01 6899 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6900 6901 // setup Controller info 6902 hci_stack->num_cmd_packets = 255; 6903 hci_stack->acl_packets_total_num = 255; 6904 6905 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6906 addr[5] = 0x01; 6907 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6908 conn->con_handle = addr[5]; 6909 conn->role = HCI_ROLE_SLAVE; 6910 conn->state = RECEIVED_CONNECTION_REQUEST; 6911 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6912 6913 // setup incoming Classic SCO connection with con handle 0x0002 6914 addr[5] = 0x02; 6915 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6916 conn->con_handle = addr[5]; 6917 conn->role = HCI_ROLE_SLAVE; 6918 conn->state = RECEIVED_CONNECTION_REQUEST; 6919 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6920 6921 // setup ready Classic ACL connection with con handle 0x0003 6922 addr[5] = 0x03; 6923 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6924 conn->con_handle = addr[5]; 6925 conn->role = HCI_ROLE_SLAVE; 6926 conn->state = OPEN; 6927 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6928 6929 // setup ready Classic SCO connection with con handle 0x0004 6930 addr[5] = 0x04; 6931 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6932 conn->con_handle = addr[5]; 6933 conn->role = HCI_ROLE_SLAVE; 6934 conn->state = OPEN; 6935 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6936 6937 // setup ready LE ACL connection with con handle 0x005 and public address 6938 addr[5] = 0x05; 6939 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6940 conn->con_handle = addr[5]; 6941 conn->role = HCI_ROLE_SLAVE; 6942 conn->state = OPEN; 6943 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6944 conn->sm_connection.sm_connection_encrypted = 1; 6945 } 6946 6947 void hci_free_connections_fuzz(void){ 6948 btstack_linked_list_iterator_t it; 6949 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6950 while (btstack_linked_list_iterator_has_next(&it)){ 6951 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6952 btstack_linked_list_iterator_remove(&it); 6953 btstack_memory_hci_connection_free(con); 6954 } 6955 } 6956 void hci_simulate_working_fuzz(void){ 6957 hci_init_done(); 6958 hci_stack->num_cmd_packets = 255; 6959 } 6960 #endif 6961