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 int 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 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAG_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 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){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 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); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return 0; 443 return (int) hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 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){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 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); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 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); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 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); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 int hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return 0; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 int hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return 0; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return 0; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 int hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return 0; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 int hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 int hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return 0; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 int hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 int hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return 0; 701 } 702 hci_stack->hci_packet_buffer_reserved = 1; 703 return 1; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = 0; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // 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); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 int err; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 781 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 782 783 // done yet? 784 if (!more_fragments) break; 785 786 // can send more? 787 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 788 } 789 790 log_debug("hci_send_acl_packet_fragments loop over"); 791 792 // release buffer now for synchronous transport 793 if (hci_transport_synchronous()){ 794 hci_stack->acl_fragmentation_tx_active = 0; 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 } 798 799 return err; 800 } 801 802 // pre: caller has reserved the packet buffer 803 int hci_send_acl_packet_buffer(int size){ 804 805 // log_info("hci_send_acl_packet_buffer size %u", size); 806 807 if (!hci_stack->hci_packet_buffer_reserved) { 808 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 809 return 0; 810 } 811 812 uint8_t * packet = hci_stack->hci_packet_buffer; 813 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 814 815 // check for free places on Bluetooth module 816 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 817 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 818 hci_release_packet_buffer(); 819 hci_emit_transport_packet_sent(); 820 return BTSTACK_ACL_BUFFERS_FULL; 821 } 822 823 hci_connection_t *connection = hci_connection_for_handle( con_handle); 824 if (!connection) { 825 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return 0; 829 } 830 831 #ifdef ENABLE_CLASSIC 832 hci_connection_timestamp(connection); 833 #endif 834 835 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 836 837 // setup data 838 hci_stack->acl_fragmentation_total_size = size; 839 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 840 841 return hci_send_acl_packet_fragments(connection); 842 } 843 844 #ifdef ENABLE_CLASSIC 845 // pre: caller has reserved the packet buffer 846 int hci_send_sco_packet_buffer(int size){ 847 848 // log_info("hci_send_acl_packet_buffer size %u", size); 849 850 if (!hci_stack->hci_packet_buffer_reserved) { 851 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 852 return 0; 853 } 854 855 uint8_t * packet = hci_stack->hci_packet_buffer; 856 857 // skip checks in loopback mode 858 if (!hci_stack->loopback_mode){ 859 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 860 861 // check for free places on Bluetooth module 862 if (!hci_can_send_prepared_sco_packet_now()) { 863 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 864 hci_release_packet_buffer(); 865 hci_emit_transport_packet_sent(); 866 return BTSTACK_ACL_BUFFERS_FULL; 867 } 868 869 // track send packet in connection struct 870 hci_connection_t *connection = hci_connection_for_handle( con_handle); 871 if (!connection) { 872 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 873 hci_release_packet_buffer(); 874 hci_emit_transport_packet_sent(); 875 return 0; 876 } 877 878 if (hci_have_usb_transport()){ 879 // token used 880 hci_stack->sco_can_send_now = 0; 881 } else { 882 if (hci_stack->synchronous_flow_control_enabled){ 883 connection->num_packets_sent++; 884 } else { 885 connection->sco_tx_ready--; 886 } 887 } 888 } 889 890 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 891 892 #ifdef HAVE_SCO_TRANSPORT 893 hci_stack->sco_transport->send_packet(packet, size); 894 hci_release_packet_buffer(); 895 hci_emit_transport_packet_sent(); 896 897 return 0; 898 #else 899 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 900 if (hci_transport_synchronous()){ 901 hci_release_packet_buffer(); 902 hci_emit_transport_packet_sent(); 903 } 904 905 return err; 906 #endif 907 } 908 #endif 909 910 static void acl_handler(uint8_t *packet, uint16_t size){ 911 912 // get info 913 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 914 hci_connection_t *conn = hci_connection_for_handle(con_handle); 915 uint8_t acl_flags = READ_ACL_FLAGS(packet); 916 uint16_t acl_length = READ_ACL_LENGTH(packet); 917 918 // ignore non-registered handle 919 if (!conn){ 920 log_error("acl_handler called with non-registered handle %u!" , con_handle); 921 return; 922 } 923 924 // assert packet is complete 925 if ((acl_length + 4u) != size){ 926 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 927 return; 928 } 929 930 #ifdef ENABLE_CLASSIC 931 // update idle timestamp 932 hci_connection_timestamp(conn); 933 #endif 934 935 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 936 hci_stack->host_completed_packets = 1; 937 conn->num_packets_completed++; 938 #endif 939 940 // handle different packet types 941 switch (acl_flags & 0x03u) { 942 943 case 0x01: // continuation fragment 944 945 // sanity checks 946 if (conn->acl_recombination_pos == 0u) { 947 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 948 return; 949 } 950 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 951 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 952 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 953 conn->acl_recombination_pos = 0; 954 return; 955 } 956 957 // append fragment payload (header already stored) 958 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 959 &packet[4], acl_length); 960 conn->acl_recombination_pos += acl_length; 961 962 // forward complete L2CAP packet if complete. 963 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 964 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 965 // reset recombination buffer 966 conn->acl_recombination_length = 0; 967 conn->acl_recombination_pos = 0; 968 } 969 break; 970 971 case 0x02: { // first fragment 972 973 // sanity check 974 if (conn->acl_recombination_pos) { 975 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 976 conn->acl_recombination_pos = 0; 977 } 978 979 // peek into L2CAP packet! 980 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 981 982 // compare fragment size to L2CAP packet size 983 if (acl_length >= (l2cap_length + 4u)){ 984 // forward fragment as L2CAP packet 985 hci_emit_acl_packet(packet, acl_length + 4u); 986 } else { 987 988 if (acl_length > HCI_ACL_BUFFER_SIZE){ 989 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 990 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 991 return; 992 } 993 994 // store first fragment and tweak acl length for complete package 995 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 996 packet, acl_length + 4u); 997 conn->acl_recombination_pos = acl_length + 4u; 998 conn->acl_recombination_length = l2cap_length; 999 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1000 } 1001 break; 1002 1003 } 1004 default: 1005 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1006 return; 1007 } 1008 1009 // execute main loop 1010 hci_run(); 1011 } 1012 1013 static void hci_shutdown_connection(hci_connection_t *conn){ 1014 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1015 1016 #ifdef ENABLE_CLASSIC 1017 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1018 bd_addr_type_t addr_type = conn->address_type; 1019 #endif 1020 #ifdef HAVE_SCO_TRANSPORT 1021 hci_con_handle_t con_handle = conn->con_handle; 1022 #endif 1023 #endif 1024 1025 btstack_run_loop_remove_timer(&conn->timeout); 1026 1027 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1028 btstack_memory_hci_connection_free( conn ); 1029 1030 // now it's gone 1031 hci_emit_nr_connections_changed(); 1032 1033 #ifdef ENABLE_CLASSIC 1034 #ifdef ENABLE_SCO_OVER_HCI 1035 // update SCO 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1037 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1038 } 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1042 hci_stack->sco_transport->close(con_handle); 1043 } 1044 #endif 1045 #endif 1046 } 1047 1048 #ifdef ENABLE_CLASSIC 1049 1050 static const uint16_t packet_type_sizes[] = { 1051 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1052 HCI_ACL_DH1_SIZE, 0, 0, 0, 1053 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1054 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1055 }; 1056 static const uint8_t packet_type_feature_requirement_bit[] = { 1057 0, // 3 slot packets 1058 1, // 5 slot packets 1059 25, // EDR 2 mpbs 1060 26, // EDR 3 mbps 1061 39, // 3 slot EDR packts 1062 40, // 5 slot EDR packet 1063 }; 1064 static const uint16_t packet_type_feature_packet_mask[] = { 1065 0x0f00, // 3 slot packets 1066 0xf000, // 5 slot packets 1067 0x1102, // EDR 2 mpbs 1068 0x2204, // EDR 3 mbps 1069 0x0300, // 3 slot EDR packts 1070 0x3000, // 5 slot EDR packet 1071 }; 1072 1073 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1074 // enable packet types based on size 1075 uint16_t packet_types = 0; 1076 unsigned int i; 1077 for (i=0;i<16;i++){ 1078 if (packet_type_sizes[i] == 0) continue; 1079 if (packet_type_sizes[i] <= buffer_size){ 1080 packet_types |= 1 << i; 1081 } 1082 } 1083 // disable packet types due to missing local supported features 1084 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1085 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1086 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1087 if (feature_set) continue; 1088 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1089 packet_types &= ~packet_type_feature_packet_mask[i]; 1090 } 1091 // flip bits for "may not be used" 1092 packet_types ^= 0x3306; 1093 return packet_types; 1094 } 1095 1096 uint16_t hci_usable_acl_packet_types(void){ 1097 return hci_stack->packet_types; 1098 } 1099 #endif 1100 1101 uint8_t* hci_get_outgoing_packet_buffer(void){ 1102 // hci packet buffer is >= acl data packet length 1103 return hci_stack->hci_packet_buffer; 1104 } 1105 1106 uint16_t hci_max_acl_data_packet_length(void){ 1107 return hci_stack->acl_data_packet_length; 1108 } 1109 1110 #ifdef ENABLE_CLASSIC 1111 int hci_extended_sco_link_supported(void){ 1112 // No. 31, byte 3, bit 7 1113 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1114 } 1115 #endif 1116 1117 int hci_non_flushable_packet_boundary_flag_supported(void){ 1118 // No. 54, byte 6, bit 6 1119 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1120 } 1121 1122 static int gap_ssp_supported(void){ 1123 // No. 51, byte 6, bit 3 1124 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1125 } 1126 1127 static int hci_classic_supported(void){ 1128 #ifdef ENABLE_CLASSIC 1129 // No. 37, byte 4, bit 5, = No BR/EDR Support 1130 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1131 #else 1132 return 0; 1133 #endif 1134 } 1135 1136 static int hci_le_supported(void){ 1137 #ifdef ENABLE_BLE 1138 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1139 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1140 #else 1141 return 0; 1142 #endif 1143 } 1144 1145 #ifdef ENABLE_BLE 1146 1147 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1148 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1149 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1150 } else { 1151 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1152 } 1153 } 1154 1155 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1156 *addr_type = hci_stack->le_own_addr_type; 1157 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1158 } 1159 1160 #ifdef ENABLE_LE_PERIPHERAL 1161 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1162 *addr_type = hci_stack->le_advertisements_own_addr_type; 1163 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1164 }; 1165 #endif 1166 1167 #ifdef ENABLE_LE_CENTRAL 1168 1169 /** 1170 * @brief Get own addr type and address used for LE connections (Central) 1171 */ 1172 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1173 *addr_type = hci_stack->le_connection_own_addr_type; 1174 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1175 } 1176 1177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1178 1179 int offset = 3; 1180 int num_reports = packet[offset]; 1181 offset += 1; 1182 1183 int i; 1184 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1185 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1186 for (i=0; (i<num_reports) && (offset < size);i++){ 1187 // sanity checks on data_length: 1188 uint8_t data_length = packet[offset + 8]; 1189 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1190 if ((offset + 9u + data_length + 1u) > size) return; 1191 // setup event 1192 uint8_t event_size = 10u + data_length; 1193 int pos = 0; 1194 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1195 event[pos++] = event_size; 1196 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1197 offset += 8; 1198 pos += 8; 1199 event[pos++] = packet[offset + 1 + data_length]; // rssi 1200 event[pos++] = data_length; 1201 offset++; 1202 (void)memcpy(&event[pos], &packet[offset], data_length); 1203 pos += data_length; 1204 offset += data_length + 1u; // rssi 1205 hci_emit_event(event, pos, 1); 1206 } 1207 } 1208 #endif 1209 #endif 1210 1211 #ifdef ENABLE_BLE 1212 #ifdef ENABLE_LE_PERIPHERAL 1213 static void hci_update_advertisements_enabled_for_current_roles(void){ 1214 if (hci_stack->le_advertisements_enabled){ 1215 // get number of active le slave connections 1216 int num_slave_connections = 0; 1217 btstack_linked_list_iterator_t it; 1218 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1219 while (btstack_linked_list_iterator_has_next(&it)){ 1220 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1221 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1222 if (con->state != OPEN) continue; 1223 if (con->role != HCI_ROLE_SLAVE) continue; 1224 if (!hci_is_le_connection(con)) continue; 1225 num_slave_connections++; 1226 } 1227 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1228 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1229 } else { 1230 hci_stack->le_advertisements_enabled_for_current_roles = false; 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1237 1238 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1239 if (!hci_stack->config) return 0; 1240 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1241 // Limit baud rate for Broadcom chipsets to 3 mbps 1242 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1243 baud_rate = 3000000; 1244 } 1245 return baud_rate; 1246 } 1247 1248 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1249 UNUSED(ds); 1250 1251 switch (hci_stack->substate){ 1252 case HCI_INIT_W4_SEND_RESET: 1253 log_info("Resend HCI Reset"); 1254 hci_stack->substate = HCI_INIT_SEND_RESET; 1255 hci_stack->num_cmd_packets = 1; 1256 hci_run(); 1257 break; 1258 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1259 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1260 if (hci_stack->hci_transport->reset_link){ 1261 hci_stack->hci_transport->reset_link(); 1262 } 1263 1264 /* fall through */ 1265 1266 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1267 log_info("Resend HCI Reset - CSR Warm Boot"); 1268 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1269 hci_stack->num_cmd_packets = 1; 1270 hci_run(); 1271 break; 1272 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1273 if (hci_stack->hci_transport->set_baudrate){ 1274 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1275 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1276 hci_stack->hci_transport->set_baudrate(baud_rate); 1277 } 1278 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1279 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1280 if (hci_stack->hci_transport->reset_link){ 1281 log_info("Link Reset"); 1282 hci_stack->hci_transport->reset_link(); 1283 } 1284 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1285 hci_run(); 1286 } 1287 break; 1288 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1289 // otherwise continue 1290 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1291 hci_send_cmd(&hci_read_local_supported_commands); 1292 break; 1293 default: 1294 break; 1295 } 1296 } 1297 #endif 1298 1299 static void hci_initializing_next_state(void){ 1300 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1301 } 1302 1303 // assumption: hci_can_send_command_packet_now() == true 1304 static void hci_initializing_run(void){ 1305 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1306 switch (hci_stack->substate){ 1307 case HCI_INIT_SEND_RESET: 1308 hci_state_reset(); 1309 1310 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1311 // prepare reset if command complete not received in 100ms 1312 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1313 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1314 btstack_run_loop_add_timer(&hci_stack->timeout); 1315 #endif 1316 // send command 1317 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1318 hci_send_cmd(&hci_reset); 1319 break; 1320 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1321 hci_send_cmd(&hci_read_local_version_information); 1322 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1323 break; 1324 case HCI_INIT_SEND_READ_LOCAL_NAME: 1325 hci_send_cmd(&hci_read_local_name); 1326 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1327 break; 1328 1329 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1330 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1331 hci_state_reset(); 1332 // prepare reset if command complete not received in 100ms 1333 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1334 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1335 btstack_run_loop_add_timer(&hci_stack->timeout); 1336 // send command 1337 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1338 hci_send_cmd(&hci_reset); 1339 break; 1340 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1341 hci_state_reset(); 1342 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1343 hci_send_cmd(&hci_reset); 1344 break; 1345 case HCI_INIT_SEND_BAUD_CHANGE: { 1346 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1347 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1351 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1352 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1353 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1354 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1355 btstack_run_loop_add_timer(&hci_stack->timeout); 1356 } 1357 break; 1358 } 1359 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1360 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1361 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1362 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1363 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1364 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1365 break; 1366 } 1367 case HCI_INIT_CUSTOM_INIT: 1368 // Custom initialization 1369 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1370 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1371 bool send_cmd = false; 1372 switch (hci_stack->chipset_result){ 1373 case BTSTACK_CHIPSET_VALID_COMMAND: 1374 send_cmd = true; 1375 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1376 break; 1377 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1378 send_cmd = true; 1379 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1380 log_info("CSR Warm Boot"); 1381 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1382 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1383 btstack_run_loop_add_timer(&hci_stack->timeout); 1384 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1385 && hci_stack->config 1386 && hci_stack->chipset 1387 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1388 && hci_stack->hci_transport->set_baudrate 1389 && hci_transport_uart_get_main_baud_rate()){ 1390 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1391 } else { 1392 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1393 } 1394 break; 1395 default: 1396 break; 1397 } 1398 1399 if (send_cmd){ 1400 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1401 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1402 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1403 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1404 break; 1405 } 1406 log_info("Init script done"); 1407 1408 // Init script download on Broadcom chipsets causes: 1409 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1410 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1411 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1412 1413 // - baud rate to reset, restore UART baud rate if needed 1414 int need_baud_change = hci_stack->config 1415 && hci_stack->chipset 1416 && hci_stack->chipset->set_baudrate_command 1417 && hci_stack->hci_transport->set_baudrate 1418 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1419 if (need_baud_change) { 1420 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1421 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1422 hci_stack->hci_transport->set_baudrate(baud_rate); 1423 } 1424 1425 uint16_t bcm_delay_ms = 300; 1426 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1427 // -> Work around: wait here. 1428 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1429 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1430 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1431 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1432 btstack_run_loop_add_timer(&hci_stack->timeout); 1433 break; 1434 } 1435 } 1436 // otherwise continue 1437 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1438 hci_send_cmd(&hci_read_local_supported_commands); 1439 break; 1440 case HCI_INIT_SET_BD_ADDR: 1441 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1442 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1443 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1444 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1445 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1446 break; 1447 #endif 1448 1449 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1450 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1451 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1452 hci_send_cmd(&hci_read_local_supported_commands); 1453 break; 1454 case HCI_INIT_READ_BD_ADDR: 1455 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1456 hci_send_cmd(&hci_read_bd_addr); 1457 break; 1458 case HCI_INIT_READ_BUFFER_SIZE: 1459 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1460 hci_send_cmd(&hci_read_buffer_size); 1461 break; 1462 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1463 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1464 hci_send_cmd(&hci_read_local_supported_features); 1465 break; 1466 1467 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1468 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1469 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1470 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1471 break; 1472 case HCI_INIT_HOST_BUFFER_SIZE: 1473 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1474 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1475 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1476 break; 1477 #endif 1478 1479 case HCI_INIT_SET_EVENT_MASK: 1480 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1481 if (hci_le_supported()){ 1482 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1483 } else { 1484 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1485 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1486 } 1487 break; 1488 1489 #ifdef ENABLE_CLASSIC 1490 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1492 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1493 break; 1494 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1495 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1496 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1497 break; 1498 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1499 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1500 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1501 break; 1502 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1503 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1504 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1505 break; 1506 case HCI_INIT_WRITE_LOCAL_NAME: { 1507 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1508 hci_reserve_packet_buffer(); 1509 uint8_t * packet = hci_stack->hci_packet_buffer; 1510 // construct HCI Command and send 1511 uint16_t opcode = hci_write_local_name.opcode; 1512 hci_stack->last_cmd_opcode = opcode; 1513 packet[0] = opcode & 0xff; 1514 packet[1] = opcode >> 8; 1515 packet[2] = DEVICE_NAME_LEN; 1516 memset(&packet[3], 0, DEVICE_NAME_LEN); 1517 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1518 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1519 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1520 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1521 // expand '00:00:00:00:00:00' in name with bd_addr 1522 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1523 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1524 break; 1525 } 1526 case HCI_INIT_WRITE_EIR_DATA: { 1527 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1528 hci_reserve_packet_buffer(); 1529 uint8_t * packet = hci_stack->hci_packet_buffer; 1530 // construct HCI Command in-place and send 1531 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1532 hci_stack->last_cmd_opcode = opcode; 1533 uint16_t offset = 0; 1534 packet[offset++] = opcode & 0xff; 1535 packet[offset++] = opcode >> 8; 1536 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1537 packet[offset++] = 0; // FEC not required 1538 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1539 if (hci_stack->eir_data){ 1540 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1541 ad_context_t context; 1542 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1543 uint8_t data_type = ad_iterator_get_data_type(&context); 1544 uint8_t size = ad_iterator_get_data_len(&context); 1545 const uint8_t *data = ad_iterator_get_data(&context); 1546 // copy item 1547 packet[offset++] = size + 1; 1548 packet[offset++] = data_type; 1549 memcpy(&packet[offset], data, size); 1550 // update name item 1551 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1552 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1553 } 1554 offset += size; 1555 } 1556 } else { 1557 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1558 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1559 packet[offset++] = bytes_to_copy + 1; 1560 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1561 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1562 // expand '00:00:00:00:00:00' in name with bd_addr 1563 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1564 } 1565 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1566 break; 1567 } 1568 case HCI_INIT_WRITE_INQUIRY_MODE: 1569 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1570 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1571 break; 1572 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1573 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1574 hci_stack->secure_connections_active = true; 1575 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1576 break; 1577 case HCI_INIT_WRITE_SCAN_ENABLE: 1578 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1579 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1580 break; 1581 // only sent if ENABLE_SCO_OVER_HCI is defined 1582 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1583 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1584 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1585 break; 1586 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1587 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1588 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1589 break; 1590 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1591 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1592 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1593 #ifdef ENABLE_SCO_OVER_HCI 1594 log_info("BCM: Route SCO data via HCI transport"); 1595 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1596 #endif 1597 #ifdef ENABLE_SCO_OVER_PCM 1598 log_info("BCM: Route SCO data via PCM interface"); 1599 #ifdef ENABLE_BCM_PCM_WBS 1600 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1601 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1602 #else 1603 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1604 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1605 #endif 1606 #endif 1607 break; 1608 #ifdef ENABLE_SCO_OVER_PCM 1609 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1610 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1611 log_info("BCM: Config PCM interface for I2S"); 1612 #ifdef ENABLE_BCM_PCM_WBS 1613 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1614 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1615 #else 1616 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1617 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1618 #endif 1619 break; 1620 #endif 1621 #endif 1622 1623 #ifdef ENABLE_BLE 1624 // LE INIT 1625 case HCI_INIT_LE_READ_BUFFER_SIZE: 1626 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1627 hci_send_cmd(&hci_le_read_buffer_size); 1628 break; 1629 case HCI_INIT_LE_SET_EVENT_MASK: 1630 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1631 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1632 break; 1633 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1634 // LE Supported Host = 1, Simultaneous Host = 0 1635 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1636 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1637 break; 1638 #endif 1639 1640 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1641 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1642 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1643 hci_send_cmd(&hci_le_read_maximum_data_length); 1644 break; 1645 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1646 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1647 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1648 break; 1649 #endif 1650 1651 #ifdef ENABLE_LE_CENTRAL 1652 case HCI_INIT_READ_WHITE_LIST_SIZE: 1653 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1654 hci_send_cmd(&hci_le_read_white_list_size); 1655 break; 1656 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1657 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1658 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); 1659 break; 1660 #endif 1661 default: 1662 return; 1663 } 1664 } 1665 1666 static void hci_init_done(void){ 1667 // done. tell the app 1668 log_info("hci_init_done -> HCI_STATE_WORKING"); 1669 hci_stack->state = HCI_STATE_WORKING; 1670 hci_emit_state(); 1671 hci_run(); 1672 } 1673 1674 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1675 bool command_completed = false; 1676 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1677 uint16_t opcode = little_endian_read_16(packet,3); 1678 if (opcode == hci_stack->last_cmd_opcode){ 1679 command_completed = true; 1680 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1681 } else { 1682 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1683 } 1684 } 1685 1686 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1687 uint8_t status = packet[2]; 1688 uint16_t opcode = little_endian_read_16(packet,4); 1689 if (opcode == hci_stack->last_cmd_opcode){ 1690 if (status){ 1691 command_completed = true; 1692 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1693 } else { 1694 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1695 } 1696 } else { 1697 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1698 } 1699 } 1700 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1701 // Vendor == CSR 1702 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1703 // TODO: track actual command 1704 command_completed = true; 1705 } 1706 1707 // Vendor == Toshiba 1708 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1709 // TODO: track actual command 1710 command_completed = true; 1711 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1712 hci_stack->num_cmd_packets = 1; 1713 } 1714 #endif 1715 1716 return command_completed; 1717 } 1718 1719 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1720 1721 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1722 1723 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1724 1725 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1726 1727 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1728 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1729 // 1730 // HCI Reset 1731 // Timeout 100 ms 1732 // HCI Reset 1733 // Command Complete Reset 1734 // HCI Read Local Version Information 1735 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1736 // hang... 1737 // 1738 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1739 if (!command_completed 1740 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1741 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1742 1743 uint16_t opcode = little_endian_read_16(packet,3); 1744 if (opcode == hci_reset.opcode){ 1745 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1746 return; 1747 } 1748 } 1749 1750 // CSR & H5 1751 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1752 if (!command_completed 1753 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1754 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1755 1756 uint16_t opcode = little_endian_read_16(packet,3); 1757 if (opcode == hci_reset.opcode){ 1758 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1759 return; 1760 } 1761 } 1762 1763 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1764 // fix: Correct substate and behave as command below 1765 if (command_completed){ 1766 switch (hci_stack->substate){ 1767 case HCI_INIT_SEND_RESET: 1768 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1769 break; 1770 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1772 break; 1773 default: 1774 break; 1775 } 1776 } 1777 1778 #endif 1779 1780 if (!command_completed) return; 1781 1782 bool need_baud_change = false; 1783 bool need_addr_change = false; 1784 1785 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1786 need_baud_change = hci_stack->config 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_baudrate_command 1789 && hci_stack->hci_transport->set_baudrate 1790 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1791 1792 need_addr_change = hci_stack->custom_bd_addr_set 1793 && hci_stack->chipset 1794 && hci_stack->chipset->set_bd_addr_command; 1795 #endif 1796 1797 switch(hci_stack->substate){ 1798 1799 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1800 case HCI_INIT_SEND_RESET: 1801 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1802 // fix: just correct substate and behave as command below 1803 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1804 btstack_run_loop_remove_timer(&hci_stack->timeout); 1805 break; 1806 case HCI_INIT_W4_SEND_RESET: 1807 btstack_run_loop_remove_timer(&hci_stack->timeout); 1808 break; 1809 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1810 log_info("Received local name, need baud change %d", (int) need_baud_change); 1811 if (need_baud_change){ 1812 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1813 return; 1814 } 1815 // skip baud change 1816 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1817 return; 1818 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1819 // for STLC2500D, baud rate change already happened. 1820 // for others, baud rate gets changed now 1821 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1822 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1823 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1824 hci_stack->hci_transport->set_baudrate(baud_rate); 1825 } 1826 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1827 return; 1828 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1829 btstack_run_loop_remove_timer(&hci_stack->timeout); 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_CUSTOM_INIT: 1833 // repeat custom init 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 #else 1837 case HCI_INIT_W4_SEND_RESET: 1838 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1839 return ; 1840 #endif 1841 1842 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1843 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1844 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1845 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1846 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1847 return; 1848 } 1849 if (need_addr_change){ 1850 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1851 return; 1852 } 1853 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1854 return; 1855 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1856 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1857 if (need_baud_change){ 1858 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1859 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1860 hci_stack->hci_transport->set_baudrate(baud_rate); 1861 } 1862 if (need_addr_change){ 1863 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1864 return; 1865 } 1866 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1867 return; 1868 case HCI_INIT_W4_SET_BD_ADDR: 1869 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1870 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1871 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1872 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1873 return; 1874 } 1875 // skipping st warm boot 1876 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1877 return; 1878 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1879 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1880 return; 1881 #endif 1882 case HCI_INIT_W4_READ_BD_ADDR: 1883 // only read buffer size if supported 1884 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1885 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1886 return; 1887 } 1888 // skipping read buffer size 1889 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1890 return; 1891 case HCI_INIT_W4_SET_EVENT_MASK: 1892 // skip Classic init commands for LE only chipsets 1893 if (!hci_classic_supported()){ 1894 #ifdef ENABLE_BLE 1895 if (hci_le_supported()){ 1896 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1897 return; 1898 } 1899 #endif 1900 log_error("Neither BR/EDR nor LE supported"); 1901 hci_init_done(); 1902 return; 1903 } 1904 if (!gap_ssp_supported()){ 1905 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1906 return; 1907 } 1908 break; 1909 #ifdef ENABLE_BLE 1910 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1911 // skip write le host if not supported (e.g. on LE only EM9301) 1912 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1913 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1914 return; 1915 1916 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1917 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1918 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1919 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1920 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1921 return; 1922 } 1923 // explicit fall through to reduce repetitions 1924 1925 #ifdef ENABLE_LE_CENTRAL 1926 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1927 #else 1928 hci_init_done(); 1929 #endif 1930 return; 1931 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1932 1933 #endif /* ENABLE_BLE */ 1934 1935 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1936 // skip write secure connections host support if not supported or disabled 1937 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1938 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1939 return; 1940 } 1941 break; 1942 1943 #ifdef ENABLE_SCO_OVER_HCI 1944 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1945 // skip write synchronous flow control if not supported 1946 if (hci_stack->local_supported_commands[0] & 0x04) break; 1947 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1948 1949 /* fall through */ 1950 1951 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1952 // skip write default erroneous data reporting if not supported 1953 if (hci_stack->local_supported_commands[0] & 0x08) break; 1954 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1955 1956 /* fall through */ 1957 1958 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1959 // skip bcm set sco pcm config on non-Broadcom chipsets 1960 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1961 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1962 1963 /* fall through */ 1964 1965 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1966 if (!hci_le_supported()){ 1967 // SKIP LE init for Classic only configuration 1968 hci_init_done(); 1969 return; 1970 } 1971 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1972 break; 1973 1974 #else /* !ENABLE_SCO_OVER_HCI */ 1975 1976 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1977 #ifdef ENABLE_SCO_OVER_PCM 1978 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1979 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1980 return; 1981 } 1982 #endif 1983 /* fall through */ 1984 1985 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1986 #ifdef ENABLE_BLE 1987 if (hci_le_supported()){ 1988 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1989 return; 1990 } 1991 #endif 1992 // SKIP LE init for Classic only configuration 1993 hci_init_done(); 1994 return; 1995 #endif /* ENABLE_SCO_OVER_HCI */ 1996 1997 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1998 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1999 // Response to command before init done state -> init done 2000 case (HCI_INIT_DONE-1): 2001 hci_init_done(); 2002 return; 2003 #endif 2004 2005 default: 2006 break; 2007 } 2008 hci_initializing_next_state(); 2009 } 2010 2011 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2012 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2013 bd_addr_t bd_address; 2014 (void)memcpy(&bd_address, conn->address, 6); 2015 2016 #ifdef ENABLE_CLASSIC 2017 // cache needed data 2018 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2019 #endif 2020 2021 // connection failed, remove entry 2022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2023 btstack_memory_hci_connection_free( conn ); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // notify client if dedicated bonding 2027 if (notify_dedicated_bonding_failed){ 2028 log_info("hci notify_dedicated_bonding_failed"); 2029 hci_emit_dedicated_bonding_result(bd_address, status); 2030 } 2031 2032 // if authentication error, also delete link key 2033 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2034 gap_drop_link_key_for_bd_addr(bd_address); 2035 } 2036 #else 2037 UNUSED(status); 2038 #endif 2039 } 2040 2041 #ifdef ENABLE_CLASSIC 2042 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2043 // SSP Controller 2044 if (features[6] & (1 << 3)){ 2045 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2046 } 2047 // eSCO 2048 if (features[3] & (1<<7)){ 2049 conn->remote_supported_features[0] |= 1; 2050 } 2051 // Extended features 2052 if (features[7] & (1<<7)){ 2053 conn->remote_supported_features[0] |= 2; 2054 } 2055 } 2056 2057 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2058 // SSP Host 2059 if (features[0] & (1 << 0)){ 2060 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2061 } 2062 // SC Host 2063 if (features[0] & (1 << 3)){ 2064 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2065 } 2066 } 2067 2068 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2069 // SC Controller 2070 if (features[1] & (1 << 0)){ 2071 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2072 } 2073 } 2074 2075 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2076 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2077 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2078 if (conn->bonding_flags & BONDING_DEDICATED){ 2079 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2080 } 2081 } 2082 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2083 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2084 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2085 } 2086 2087 #endif 2088 2089 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2090 // handle BT initialization 2091 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2092 hci_initializing_event_handler(packet, size); 2093 } 2094 2095 // help with BT sleep 2096 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2097 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2098 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2099 hci_initializing_next_state(); 2100 } 2101 } 2102 2103 #ifdef ENABLE_CLASSIC 2104 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2105 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2106 conn->encryption_key_size = encryption_key_size; 2107 2108 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2109 conn->requested_security_level = LEVEL_0; 2110 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2111 return; 2112 } 2113 2114 // Request Authentication if not already done 2115 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2116 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2117 } 2118 #endif 2119 2120 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2121 UNUSED(size); 2122 2123 uint16_t manufacturer; 2124 #ifdef ENABLE_CLASSIC 2125 hci_con_handle_t handle; 2126 hci_connection_t * conn; 2127 uint8_t status; 2128 #endif 2129 // get num cmd packets - limit to 1 to reduce complexity 2130 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2131 2132 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2133 switch (opcode){ 2134 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2135 if (packet[5]) break; 2136 // terminate, name 248 chars 2137 packet[6+248] = 0; 2138 log_info("local name: %s", &packet[6]); 2139 break; 2140 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2141 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2142 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2143 uint16_t acl_len = little_endian_read_16(packet, 6); 2144 uint16_t sco_len = packet[8]; 2145 2146 // determine usable ACL/SCO payload size 2147 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2148 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2149 2150 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2151 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2152 2153 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2154 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2155 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2156 } 2157 break; 2158 case HCI_OPCODE_HCI_READ_RSSI: 2159 if (packet[5] == ERROR_CODE_SUCCESS){ 2160 uint8_t event[5]; 2161 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2162 event[1] = 3; 2163 (void)memcpy(&event[2], &packet[6], 3); 2164 hci_emit_event(event, sizeof(event), 1); 2165 } 2166 break; 2167 #ifdef ENABLE_BLE 2168 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2169 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2170 hci_stack->le_acl_packets_total_num = packet[8]; 2171 // determine usable ACL payload size 2172 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2173 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2174 } 2175 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2176 break; 2177 #endif 2178 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2179 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2180 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2181 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2182 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); 2183 break; 2184 #endif 2185 #ifdef ENABLE_LE_CENTRAL 2186 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2187 hci_stack->le_whitelist_capacity = packet[6]; 2188 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2189 break; 2190 #endif 2191 case HCI_OPCODE_HCI_READ_BD_ADDR: 2192 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2193 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)); 2194 #ifdef ENABLE_CLASSIC 2195 if (hci_stack->link_key_db){ 2196 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2197 } 2198 #endif 2199 break; 2200 #ifdef ENABLE_CLASSIC 2201 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2202 hci_emit_discoverable_enabled(hci_stack->discoverable); 2203 break; 2204 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2205 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2206 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2207 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2208 hci_emit_event(event, sizeof(event), 1); 2209 } 2210 break; 2211 #endif 2212 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2213 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2214 2215 #ifdef ENABLE_CLASSIC 2216 // determine usable ACL packet types based on host buffer size and supported features 2217 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2218 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2219 #endif 2220 // Classic/LE 2221 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2222 break; 2223 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2224 manufacturer = little_endian_read_16(packet, 10); 2225 // map Cypress to Broadcom 2226 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2227 log_info("Treat Cypress as Broadcom"); 2228 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2229 little_endian_store_16(packet, 10, manufacturer); 2230 } 2231 hci_stack->manufacturer = manufacturer; 2232 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2233 break; 2234 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2235 hci_stack->local_supported_commands[0] = 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2244 hci_stack->local_supported_commands[1] = 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2250 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2251 break; 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2254 if (packet[5]) return; 2255 hci_stack->synchronous_flow_control_enabled = 1; 2256 break; 2257 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2258 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2259 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2260 conn = hci_connection_for_handle(handle); 2261 if (conn != NULL) { 2262 uint8_t key_size = 0; 2263 if (status == 0){ 2264 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2265 log_info("Handle %04x key Size: %u", handle, key_size); 2266 } else { 2267 key_size = 1; 2268 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2269 } 2270 hci_handle_read_encryption_key_size_complete(conn, key_size); 2271 } 2272 break; 2273 // assert pairing complete event is emitted. 2274 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2275 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2276 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2277 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2278 // lookup connection by gap pairing addr 2279 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2280 if (conn == NULL) break; 2281 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2282 break; 2283 2284 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2285 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2286 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2287 uint8_t event[67]; 2288 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2289 event[1] = 65; 2290 (void)memset(&event[2], 0, 65); 2291 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2292 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2293 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2294 event[2] = 3; 2295 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2296 } else { 2297 event[2] = 1; 2298 } 2299 } 2300 hci_emit_event(event, sizeof(event), 0); 2301 break; 2302 } 2303 2304 // note: only needed if user does not provide OOB data 2305 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2306 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2307 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2308 if (conn == NULL) break; 2309 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2310 break; 2311 #endif 2312 #endif 2313 default: 2314 break; 2315 } 2316 } 2317 2318 #ifdef ENABLE_BLE 2319 static void event_handle_le_connection_complete(const uint8_t * packet){ 2320 bd_addr_t addr; 2321 bd_addr_type_t addr_type; 2322 hci_connection_t * conn; 2323 2324 // Connection management 2325 reverse_bd_addr(&packet[8], addr); 2326 addr_type = (bd_addr_type_t)packet[7]; 2327 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2328 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2329 2330 #ifdef ENABLE_LE_CENTRAL 2331 // handle error: error is reported only to the initiator -> outgoing connection 2332 if (packet[3]){ 2333 2334 // handle cancelled outgoing connection 2335 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2336 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2337 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2338 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2339 // reset state 2340 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2341 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2342 // get outgoing connection conn struct for direct connect 2343 conn = gap_get_outgoing_connection(); 2344 } 2345 2346 // outgoing le connection establishment is done 2347 if (conn){ 2348 // remove entry 2349 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2350 btstack_memory_hci_connection_free( conn ); 2351 } 2352 return; 2353 } 2354 #endif 2355 2356 // on success, both hosts receive connection complete event 2357 if (packet[6] == HCI_ROLE_MASTER){ 2358 #ifdef ENABLE_LE_CENTRAL 2359 // if we're master on an le connection, it was an outgoing connection and we're done with it 2360 // note: no hci_connection_t object exists yet for connect with whitelist 2361 if (hci_is_le_connection_type(addr_type)){ 2362 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2363 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2364 } 2365 #endif 2366 } else { 2367 #ifdef ENABLE_LE_PERIPHERAL 2368 // if we're slave, it was an incoming connection, advertisements have stopped 2369 hci_stack->le_advertisements_active = false; 2370 #endif 2371 } 2372 2373 // LE connections are auto-accepted, so just create a connection if there isn't one already 2374 if (!conn){ 2375 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2376 } 2377 2378 // no memory, sorry. 2379 if (!conn){ 2380 return; 2381 } 2382 2383 conn->state = OPEN; 2384 conn->role = packet[6]; 2385 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2386 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2387 2388 #ifdef ENABLE_LE_PERIPHERAL 2389 if (packet[6] == HCI_ROLE_SLAVE){ 2390 hci_update_advertisements_enabled_for_current_roles(); 2391 } 2392 #endif 2393 2394 // init unenhanced att bearer mtu 2395 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2396 conn->att_connection.mtu_exchanged = false; 2397 2398 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2399 2400 // restart timer 2401 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2402 // btstack_run_loop_add_timer(&conn->timeout); 2403 2404 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2405 2406 hci_emit_nr_connections_changed(); 2407 } 2408 #endif 2409 2410 #ifdef ENABLE_CLASSIC 2411 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){ 2412 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2413 // LEVEL_4 is tested by l2cap 2414 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2415 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2416 if (level >= LEVEL_3){ 2417 // MITM not possible without keyboard or display 2418 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2419 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2420 2421 // MITM possible if one side has keyboard and the other has keyboard or display 2422 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2423 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2424 2425 // MITM not possible if one side has only display and other side has no keyboard 2426 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2427 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2428 } 2429 // LEVEL 2 requires SSP, which is a given 2430 return true; 2431 } 2432 2433 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2434 uint16_t i; 2435 for (i=0; i < size ; i++){ 2436 if (data[i] != 0) { 2437 return false; 2438 } 2439 } 2440 return true; 2441 } 2442 2443 #endif 2444 2445 static void event_handler(uint8_t *packet, uint16_t size){ 2446 2447 uint16_t event_length = packet[1]; 2448 2449 // assert packet is complete 2450 if (size != (event_length + 2u)){ 2451 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2452 return; 2453 } 2454 2455 bd_addr_type_t addr_type; 2456 hci_con_handle_t handle; 2457 hci_connection_t * conn; 2458 int i; 2459 int create_connection_cmd; 2460 2461 #ifdef ENABLE_CLASSIC 2462 hci_link_type_t link_type; 2463 bd_addr_t addr; 2464 #endif 2465 2466 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2467 2468 switch (hci_event_packet_get_type(packet)) { 2469 2470 case HCI_EVENT_COMMAND_COMPLETE: 2471 handle_command_complete_event(packet, size); 2472 break; 2473 2474 case HCI_EVENT_COMMAND_STATUS: 2475 // get num cmd packets - limit to 1 to reduce complexity 2476 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2477 2478 // check command status to detected failed outgoing connections 2479 create_connection_cmd = 0; 2480 #ifdef ENABLE_CLASSIC 2481 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2482 create_connection_cmd = 1; 2483 } 2484 #endif 2485 #ifdef ENABLE_LE_CENTRAL 2486 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2487 create_connection_cmd = 1; 2488 } 2489 #endif 2490 if (create_connection_cmd) { 2491 uint8_t status = hci_event_command_status_get_status(packet); 2492 addr_type = hci_stack->outgoing_addr_type; 2493 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2494 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); 2495 2496 // reset outgoing address info 2497 memset(hci_stack->outgoing_addr, 0, 6); 2498 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2499 2500 // on error 2501 if (status != ERROR_CODE_SUCCESS){ 2502 #ifdef ENABLE_LE_CENTRAL 2503 if (hci_is_le_connection_type(addr_type)){ 2504 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2505 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2506 } 2507 #endif 2508 // error => outgoing connection failed 2509 if (conn != NULL){ 2510 hci_handle_connection_failed(conn, status); 2511 } 2512 } 2513 } 2514 2515 #ifdef ENABLE_CLASSIC 2516 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2517 uint8_t status = hci_event_command_status_get_status(packet); 2518 log_info("command status (inquiry), status %x", status); 2519 if (status == ERROR_CODE_SUCCESS) { 2520 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2521 } else { 2522 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2523 } 2524 } 2525 #endif 2526 break; 2527 2528 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2529 if (size < 3) return; 2530 uint16_t num_handles = packet[2]; 2531 if (size != (3u + num_handles * 4u)) return; 2532 uint16_t offset = 3; 2533 for (i=0; i<num_handles;i++){ 2534 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2535 offset += 2u; 2536 uint16_t num_packets = little_endian_read_16(packet, offset); 2537 offset += 2u; 2538 2539 conn = hci_connection_for_handle(handle); 2540 if (!conn){ 2541 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2542 continue; 2543 } 2544 2545 if (conn->num_packets_sent >= num_packets){ 2546 conn->num_packets_sent -= num_packets; 2547 } else { 2548 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2549 conn->num_packets_sent = 0; 2550 } 2551 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2552 2553 #ifdef ENABLE_CLASSIC 2554 // For SCO, we do the can_send_now_check here 2555 hci_notify_if_sco_can_send_now(); 2556 #endif 2557 } 2558 break; 2559 } 2560 2561 #ifdef ENABLE_CLASSIC 2562 case HCI_EVENT_INQUIRY_COMPLETE: 2563 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2564 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2565 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2566 hci_emit_event(event, sizeof(event), 1); 2567 } 2568 break; 2569 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2570 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2571 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2572 } 2573 break; 2574 case HCI_EVENT_CONNECTION_REQUEST: 2575 reverse_bd_addr(&packet[2], addr); 2576 link_type = (hci_link_type_t) packet[11]; 2577 2578 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2579 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2580 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2581 bd_addr_copy(hci_stack->decline_addr, addr); 2582 break; 2583 } 2584 2585 if (hci_stack->gap_classic_accept_callback != NULL){ 2586 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2587 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2588 bd_addr_copy(hci_stack->decline_addr, addr); 2589 break; 2590 } 2591 } 2592 2593 // TODO: eval COD 8-10 2594 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2595 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2596 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2597 if (!conn) { 2598 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2599 } 2600 if (!conn) { 2601 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2602 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2603 bd_addr_copy(hci_stack->decline_addr, addr); 2604 break; 2605 } 2606 conn->role = HCI_ROLE_SLAVE; 2607 conn->state = RECEIVED_CONNECTION_REQUEST; 2608 // store info about eSCO 2609 if (link_type == HCI_LINK_TYPE_ESCO){ 2610 conn->remote_supported_features[0] |= 1; 2611 } 2612 hci_run(); 2613 break; 2614 2615 case HCI_EVENT_CONNECTION_COMPLETE: 2616 // Connection management 2617 reverse_bd_addr(&packet[5], addr); 2618 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2619 addr_type = BD_ADDR_TYPE_ACL; 2620 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2621 if (conn) { 2622 if (!packet[2]){ 2623 conn->state = OPEN; 2624 conn->con_handle = little_endian_read_16(packet, 3); 2625 2626 // queue get remote feature 2627 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2628 2629 // queue set supervision timeout if we're master 2630 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2631 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2632 } 2633 2634 // restart timer 2635 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2636 btstack_run_loop_add_timer(&conn->timeout); 2637 2638 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2639 2640 hci_emit_nr_connections_changed(); 2641 } else { 2642 // connection failed 2643 hci_handle_connection_failed(conn, packet[2]); 2644 } 2645 } 2646 break; 2647 2648 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2649 reverse_bd_addr(&packet[5], addr); 2650 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2651 if (packet[2]){ 2652 // connection failed 2653 break; 2654 } 2655 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2656 if (!conn) { 2657 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2658 } 2659 if (!conn) { 2660 break; 2661 } 2662 conn->state = OPEN; 2663 conn->con_handle = little_endian_read_16(packet, 3); 2664 2665 #ifdef ENABLE_SCO_OVER_HCI 2666 // update SCO 2667 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2668 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2669 } 2670 // trigger can send now 2671 if (hci_have_usb_transport()){ 2672 hci_stack->sco_can_send_now = 1; 2673 } 2674 #endif 2675 #ifdef HAVE_SCO_TRANSPORT 2676 // configure sco transport 2677 if (hci_stack->sco_transport != NULL){ 2678 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2679 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2680 } 2681 #endif 2682 break; 2683 2684 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2685 handle = little_endian_read_16(packet, 3); 2686 conn = hci_connection_for_handle(handle); 2687 if (!conn) break; 2688 if (!packet[2]){ 2689 const uint8_t * features = &packet[5]; 2690 hci_handle_remote_features_page_0(conn, features); 2691 2692 // read extended features if possible 2693 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2694 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2695 break; 2696 } 2697 } 2698 hci_handle_remote_features_received(conn); 2699 break; 2700 2701 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2702 handle = little_endian_read_16(packet, 3); 2703 conn = hci_connection_for_handle(handle); 2704 if (!conn) break; 2705 // status = ok, page = 1 2706 if (!packet[2]) { 2707 uint8_t page_number = packet[5]; 2708 uint8_t maximum_page_number = packet[6]; 2709 const uint8_t * features = &packet[7]; 2710 bool done = false; 2711 switch (page_number){ 2712 case 1: 2713 hci_handle_remote_features_page_1(conn, features); 2714 if (maximum_page_number >= 2){ 2715 // get Secure Connections (Controller) from Page 2 if available 2716 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2717 } else { 2718 // otherwise, assume SC (Controller) == SC (Host) 2719 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2720 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2721 } 2722 done = true; 2723 } 2724 break; 2725 case 2: 2726 hci_handle_remote_features_page_2(conn, features); 2727 done = true; 2728 break; 2729 default: 2730 break; 2731 } 2732 if (!done) break; 2733 } 2734 hci_handle_remote_features_received(conn); 2735 break; 2736 2737 case HCI_EVENT_LINK_KEY_REQUEST: 2738 // request handled by hci_run() 2739 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2740 break; 2741 2742 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2743 hci_event_link_key_request_get_bd_addr(packet, addr); 2744 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2745 if (!conn) break; 2746 2747 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2748 2749 // CVE-2020-26555: ignore NULL link key 2750 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2751 if (btstack_is_null(&packet[8], 16)) break; 2752 2753 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2754 // Change Connection Encryption keeps link key type 2755 if (link_key_type != CHANGED_COMBINATION_KEY){ 2756 conn->link_key_type = link_key_type; 2757 } 2758 2759 // cache link key. link keys stored in little-endian format for legacy reasons 2760 memcpy(&conn->link_key, &packet[8], 16); 2761 2762 // only store link key: 2763 // - if bondable enabled 2764 if (hci_stack->bondable == false) break; 2765 // - if security level sufficient 2766 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2767 // - for SSP, also check if remote side requested bonding as well 2768 if (conn->link_key_type != COMBINATION_KEY){ 2769 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2770 if (!remote_bonding){ 2771 break; 2772 } 2773 } 2774 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2775 break; 2776 } 2777 2778 case HCI_EVENT_PIN_CODE_REQUEST: 2779 hci_event_pin_code_request_get_bd_addr(packet, addr); 2780 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2781 if (!conn) break; 2782 2783 hci_pairing_started(conn, false); 2784 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2785 if (!hci_stack->bondable ){ 2786 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2787 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2788 hci_run(); 2789 return; 2790 } 2791 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2792 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2793 log_info("Level 4 required, but SC not supported -> abort"); 2794 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2795 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2796 hci_run(); 2797 return; 2798 } 2799 break; 2800 2801 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2802 hci_event_io_capability_response_get_bd_addr(packet, addr); 2803 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2804 if (!conn) break; 2805 2806 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2807 hci_pairing_started(conn, true); 2808 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2809 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2810 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2811 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2812 #endif 2813 break; 2814 2815 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2816 hci_event_io_capability_response_get_bd_addr(packet, addr); 2817 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2818 if (!conn) break; 2819 2820 hci_connection_timestamp(conn); 2821 2822 hci_pairing_started(conn, true); 2823 2824 // assess security: LEVEL 4 requires SC 2825 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2826 log_info("Level 4 required, but SC not supported -> abort"); 2827 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2828 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2829 break; 2830 } 2831 2832 // assess security based on io capabilities 2833 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2834 // responder: fully validate io caps of both sides 2835 if (!hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)){ 2836 log_info("IOCap insufficient for level %u -> abort", conn->requested_security_level); 2837 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2838 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2839 break; 2840 } 2841 } else { 2842 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2843 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2844 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2845 log_info("Level 3+ required, but no input/output -> abort"); 2846 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2847 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2848 break; 2849 } 2850 #endif 2851 } 2852 2853 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2854 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2855 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2856 } else { 2857 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2858 } 2859 #endif 2860 break; 2861 2862 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2863 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2864 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2865 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2866 if (!conn) break; 2867 2868 hci_connection_timestamp(conn); 2869 2870 hci_pairing_started(conn, true); 2871 2872 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2873 break; 2874 #endif 2875 2876 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2877 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2878 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2879 if (!conn) break; 2880 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2881 if (hci_stack->ssp_auto_accept){ 2882 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2883 }; 2884 } else { 2885 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2886 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2887 // don't forward event to app 2888 hci_run(); 2889 return; 2890 } 2891 break; 2892 2893 case HCI_EVENT_USER_PASSKEY_REQUEST: 2894 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2895 if (hci_stack->ssp_auto_accept){ 2896 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2897 }; 2898 break; 2899 2900 case HCI_EVENT_MODE_CHANGE: 2901 handle = hci_event_mode_change_get_handle(packet); 2902 conn = hci_connection_for_handle(handle); 2903 if (!conn) break; 2904 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2905 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2906 break; 2907 #endif 2908 2909 case HCI_EVENT_ENCRYPTION_CHANGE: 2910 handle = hci_event_encryption_change_get_connection_handle(packet); 2911 conn = hci_connection_for_handle(handle); 2912 if (!conn) break; 2913 if (hci_event_encryption_change_get_status(packet) == 0u) { 2914 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2915 if (encryption_enabled){ 2916 if (hci_is_le_connection(conn)){ 2917 // For LE, we accept connection as encrypted 2918 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2919 } 2920 #ifdef ENABLE_CLASSIC 2921 else { 2922 2923 // dedicated bonding: send result and disconnect 2924 if (conn->bonding_flags & BONDING_DEDICATED){ 2925 conn->bonding_flags &= ~BONDING_DEDICATED; 2926 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2927 conn->bonding_status = packet[2]; 2928 break; 2929 } 2930 2931 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2932 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2933 bool connected_uses_aes_ccm = encryption_enabled == 2; 2934 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2935 log_info("SC during pairing, but only E0 now -> abort"); 2936 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2937 break; 2938 } 2939 2940 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2941 if (connected_uses_aes_ccm){ 2942 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2943 } 2944 2945 #ifdef ENABLE_TESTING_SUPPORT 2946 // work around for issue with PTS dongle 2947 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2948 #endif 2949 2950 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2951 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2952 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2953 } else { 2954 // if not, pretend everything is perfect 2955 hci_handle_read_encryption_key_size_complete(conn, 16); 2956 } 2957 } 2958 #endif 2959 } else { 2960 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2961 } 2962 } 2963 2964 break; 2965 2966 #ifdef ENABLE_CLASSIC 2967 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2968 handle = hci_event_authentication_complete_get_connection_handle(packet); 2969 conn = hci_connection_for_handle(handle); 2970 if (!conn) break; 2971 2972 // clear authentication active flag 2973 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2974 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2975 2976 // authenticated only if auth status == 0 2977 if (hci_event_authentication_complete_get_status(packet) == 0){ 2978 // authenticated 2979 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2980 2981 // If not already encrypted, start encryption 2982 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2983 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2984 break; 2985 } 2986 } 2987 2988 // emit updated security level 2989 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2990 break; 2991 2992 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2993 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2994 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2995 if (!conn) break; 2996 2997 // treat successfully paired connection as authenticated 2998 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 2999 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3000 } 3001 3002 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3003 break; 3004 #endif 3005 3006 // HCI_EVENT_DISCONNECTION_COMPLETE 3007 // has been split, to first notify stack before shutting connection down 3008 // see end of function, too. 3009 case HCI_EVENT_DISCONNECTION_COMPLETE: 3010 if (packet[2]) break; // status != 0 3011 handle = little_endian_read_16(packet, 3); 3012 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3013 if (hci_stack->acl_fragmentation_total_size > 0u) { 3014 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3015 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3016 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3017 hci_stack->acl_fragmentation_total_size = 0; 3018 hci_stack->acl_fragmentation_pos = 0; 3019 if (release_buffer){ 3020 hci_release_packet_buffer(); 3021 } 3022 } 3023 } 3024 3025 conn = hci_connection_for_handle(handle); 3026 if (!conn) break; 3027 #ifdef ENABLE_CLASSIC 3028 // pairing failed if it was ongoing 3029 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3030 #endif 3031 // mark connection for shutdown 3032 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3033 3034 // emit dedicatd bonding event 3035 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3036 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3037 } 3038 3039 #ifdef ENABLE_BLE 3040 #ifdef ENABLE_LE_PERIPHERAL 3041 // re-enable advertisements for le connections if active 3042 if (hci_is_le_connection(conn)){ 3043 hci_update_advertisements_enabled_for_current_roles(); 3044 } 3045 #endif 3046 #endif 3047 break; 3048 3049 case HCI_EVENT_HARDWARE_ERROR: 3050 log_error("Hardware Error: 0x%02x", packet[2]); 3051 if (hci_stack->hardware_error_callback){ 3052 (*hci_stack->hardware_error_callback)(packet[2]); 3053 } else { 3054 // if no special requests, just reboot stack 3055 hci_power_control_off(); 3056 hci_power_control_on(); 3057 } 3058 break; 3059 3060 #ifdef ENABLE_CLASSIC 3061 case HCI_EVENT_ROLE_CHANGE: 3062 if (packet[2]) break; // status != 0 3063 reverse_bd_addr(&packet[3], addr); 3064 addr_type = BD_ADDR_TYPE_ACL; 3065 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3066 if (!conn) break; 3067 conn->role = packet[9]; 3068 break; 3069 #endif 3070 3071 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3072 // release packet buffer only for asynchronous transport and if there are not further fragements 3073 if (hci_transport_synchronous()) { 3074 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3075 return; // instead of break: to avoid re-entering hci_run() 3076 } 3077 hci_stack->acl_fragmentation_tx_active = 0; 3078 if (hci_stack->acl_fragmentation_total_size) break; 3079 hci_release_packet_buffer(); 3080 3081 // L2CAP receives this event via the hci_emit_event below 3082 3083 #ifdef ENABLE_CLASSIC 3084 // For SCO, we do the can_send_now_check here 3085 hci_notify_if_sco_can_send_now(); 3086 #endif 3087 break; 3088 3089 #ifdef ENABLE_CLASSIC 3090 case HCI_EVENT_SCO_CAN_SEND_NOW: 3091 // For SCO, we do the can_send_now_check here 3092 hci_stack->sco_can_send_now = 1; 3093 hci_notify_if_sco_can_send_now(); 3094 return; 3095 3096 // explode inquriy results for easier consumption 3097 case HCI_EVENT_INQUIRY_RESULT: 3098 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3099 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3100 gap_inquiry_explode(packet, size); 3101 break; 3102 #endif 3103 3104 #ifdef ENABLE_BLE 3105 case HCI_EVENT_LE_META: 3106 switch (packet[2]){ 3107 #ifdef ENABLE_LE_CENTRAL 3108 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3109 // log_info("advertising report received"); 3110 if (!hci_stack->le_scanning_enabled) break; 3111 le_handle_advertisement_report(packet, size); 3112 break; 3113 #endif 3114 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3115 event_handle_le_connection_complete(packet); 3116 break; 3117 3118 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3119 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3120 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3121 conn = hci_connection_for_handle(handle); 3122 if (!conn) break; 3123 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3124 break; 3125 3126 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3127 // connection 3128 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3129 conn = hci_connection_for_handle(handle); 3130 if (conn) { 3131 // read arguments 3132 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3133 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3134 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3135 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3136 3137 // validate against current connection parameter range 3138 le_connection_parameter_range_t existing_range; 3139 gap_get_connection_parameter_range(&existing_range); 3140 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3141 if (update_parameter){ 3142 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3143 conn->le_conn_interval_min = le_conn_interval_min; 3144 conn->le_conn_interval_max = le_conn_interval_max; 3145 conn->le_conn_latency = le_conn_latency; 3146 conn->le_supervision_timeout = le_supervision_timeout; 3147 } else { 3148 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3149 } 3150 } 3151 break; 3152 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3153 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3154 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3155 conn = hci_connection_for_handle(handle); 3156 if (conn) { 3157 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3158 } 3159 break; 3160 #endif 3161 default: 3162 break; 3163 } 3164 break; 3165 #endif 3166 case HCI_EVENT_VENDOR_SPECIFIC: 3167 // Vendor specific commands often create vendor specific event instead of num completed packets 3168 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3169 switch (hci_stack->manufacturer){ 3170 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3171 hci_stack->num_cmd_packets = 1; 3172 break; 3173 default: 3174 break; 3175 } 3176 break; 3177 default: 3178 break; 3179 } 3180 3181 handle_event_for_current_stack_state(packet, size); 3182 3183 // notify upper stack 3184 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3185 3186 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3187 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3188 handle = little_endian_read_16(packet, 3); 3189 hci_connection_t * aConn = hci_connection_for_handle(handle); 3190 // discard connection if app did not trigger a reconnect in the event handler 3191 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3192 hci_shutdown_connection(aConn); 3193 } 3194 } 3195 3196 // execute main loop 3197 hci_run(); 3198 } 3199 3200 #ifdef ENABLE_CLASSIC 3201 3202 #ifdef ENABLE_SCO_OVER_HCI 3203 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3204 static void sco_schedule_tx(hci_connection_t * conn); 3205 3206 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3207 log_debug("SCO TX Timeout"); 3208 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3209 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3210 if (!conn) return; 3211 3212 // trigger send 3213 conn->sco_tx_ready = 1; 3214 // extra packet if CVSD but SCO buffer is too short 3215 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3216 conn->sco_tx_ready++; 3217 } 3218 hci_notify_if_sco_can_send_now(); 3219 } 3220 3221 3222 #define SCO_TX_AFTER_RX_MS (6) 3223 3224 static void sco_schedule_tx(hci_connection_t * conn){ 3225 3226 uint32_t now = btstack_run_loop_get_time_ms(); 3227 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3228 int time_delta_ms = sco_tx_ms - now; 3229 3230 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3231 3232 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3233 btstack_run_loop_remove_timer(timer); 3234 btstack_run_loop_set_timer(timer, time_delta_ms); 3235 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3236 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3237 btstack_run_loop_add_timer(timer); 3238 } 3239 #endif 3240 3241 static void sco_handler(uint8_t * packet, uint16_t size){ 3242 // lookup connection struct 3243 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3244 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3245 if (!conn) return; 3246 3247 #ifdef ENABLE_SCO_OVER_HCI 3248 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3249 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3250 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3251 packet[2] = 0x3c; 3252 memmove(&packet[3], &packet[23], 63); 3253 size = 63; 3254 } 3255 } 3256 3257 if (hci_have_usb_transport()){ 3258 // Nothing to do 3259 } else { 3260 // 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); 3261 if (hci_stack->synchronous_flow_control_enabled == 0){ 3262 uint32_t now = btstack_run_loop_get_time_ms(); 3263 3264 if (!conn->sco_rx_valid){ 3265 // ignore first 10 packets 3266 conn->sco_rx_count++; 3267 // log_debug("sco rx count %u", conn->sco_rx_count); 3268 if (conn->sco_rx_count == 10) { 3269 // use first timestamp as is and pretent it just started 3270 conn->sco_rx_ms = now; 3271 conn->sco_rx_valid = 1; 3272 conn->sco_rx_count = 0; 3273 sco_schedule_tx(conn); 3274 } 3275 } else { 3276 // track expected arrival timme 3277 conn->sco_rx_count++; 3278 conn->sco_rx_ms += 7; 3279 int delta = (int32_t) (now - conn->sco_rx_ms); 3280 if (delta > 0){ 3281 conn->sco_rx_ms++; 3282 } 3283 // log_debug("sco rx %u", conn->sco_rx_ms); 3284 sco_schedule_tx(conn); 3285 } 3286 } 3287 } 3288 #endif 3289 3290 // deliver to app 3291 if (hci_stack->sco_packet_handler) { 3292 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3293 } 3294 3295 #ifdef HAVE_SCO_TRANSPORT 3296 // We can send one packet for each received packet 3297 conn->sco_tx_ready++; 3298 hci_notify_if_sco_can_send_now(); 3299 #endif 3300 3301 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3302 conn->num_packets_completed++; 3303 hci_stack->host_completed_packets = 1; 3304 hci_run(); 3305 #endif 3306 } 3307 #endif 3308 3309 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3310 hci_dump_packet(packet_type, 1, packet, size); 3311 switch (packet_type) { 3312 case HCI_EVENT_PACKET: 3313 event_handler(packet, size); 3314 break; 3315 case HCI_ACL_DATA_PACKET: 3316 acl_handler(packet, size); 3317 break; 3318 #ifdef ENABLE_CLASSIC 3319 case HCI_SCO_DATA_PACKET: 3320 sco_handler(packet, size); 3321 break; 3322 #endif 3323 default: 3324 break; 3325 } 3326 } 3327 3328 /** 3329 * @brief Add event packet handler. 3330 */ 3331 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3332 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3333 } 3334 3335 3336 /** Register HCI packet handlers */ 3337 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3338 hci_stack->acl_packet_handler = handler; 3339 } 3340 3341 #ifdef ENABLE_CLASSIC 3342 /** 3343 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3344 */ 3345 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3346 hci_stack->sco_packet_handler = handler; 3347 } 3348 #endif 3349 3350 static void hci_state_reset(void){ 3351 // no connections yet 3352 hci_stack->connections = NULL; 3353 3354 // keep discoverable/connectable as this has been requested by the client(s) 3355 // hci_stack->discoverable = 0; 3356 // hci_stack->connectable = 0; 3357 // hci_stack->bondable = 1; 3358 // hci_stack->own_addr_type = 0; 3359 3360 // buffer is free 3361 hci_stack->hci_packet_buffer_reserved = 0; 3362 3363 // no pending cmds 3364 hci_stack->decline_reason = 0; 3365 hci_stack->new_scan_enable_value = 0xff; 3366 3367 hci_stack->secure_connections_active = false; 3368 3369 #ifdef ENABLE_CLASSIC 3370 hci_stack->new_page_scan_interval = 0xffff; 3371 hci_stack->new_page_scan_window = 0xffff; 3372 hci_stack->new_page_scan_type = 0xff; 3373 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3374 #endif 3375 3376 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3377 hci_stack->classic_read_local_oob_data = true; 3378 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3379 #endif 3380 3381 // LE 3382 #ifdef ENABLE_BLE 3383 memset(hci_stack->le_random_address, 0, 6); 3384 hci_stack->le_random_address_set = 0; 3385 #endif 3386 #ifdef ENABLE_LE_CENTRAL 3387 hci_stack->le_scanning_active = false; 3388 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3389 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3390 hci_stack->le_whitelist_capacity = 0; 3391 #endif 3392 #ifdef ENABLE_LE_PERIPHERAL 3393 hci_stack->le_advertisements_active = false; 3394 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3395 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3396 } 3397 if (hci_stack->le_advertisements_data != NULL){ 3398 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3399 } 3400 #endif 3401 } 3402 3403 #ifdef ENABLE_CLASSIC 3404 /** 3405 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3406 */ 3407 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3408 // store and open remote device db 3409 hci_stack->link_key_db = link_key_db; 3410 if (hci_stack->link_key_db) { 3411 hci_stack->link_key_db->open(); 3412 } 3413 } 3414 #endif 3415 3416 void hci_init(const hci_transport_t *transport, const void *config){ 3417 3418 #ifdef HAVE_MALLOC 3419 if (!hci_stack) { 3420 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3421 } 3422 #else 3423 hci_stack = &hci_stack_static; 3424 #endif 3425 memset(hci_stack, 0, sizeof(hci_stack_t)); 3426 3427 // reference to use transport layer implementation 3428 hci_stack->hci_transport = transport; 3429 3430 // reference to used config 3431 hci_stack->config = config; 3432 3433 // setup pointer for outgoing packet buffer 3434 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3435 3436 // max acl payload size defined in config.h 3437 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3438 3439 // register packet handlers with transport 3440 transport->register_packet_handler(&packet_handler); 3441 3442 hci_stack->state = HCI_STATE_OFF; 3443 3444 // class of device 3445 hci_stack->class_of_device = 0x007a020c; // Smartphone 3446 3447 // bondable by default 3448 hci_stack->bondable = 1; 3449 3450 #ifdef ENABLE_CLASSIC 3451 // classic name 3452 hci_stack->local_name = default_classic_name; 3453 3454 // Master slave policy 3455 hci_stack->master_slave_policy = 1; 3456 3457 // Allow Role Switch 3458 hci_stack->allow_role_switch = 1; 3459 3460 // Default / minimum security level = 2 3461 hci_stack->gap_security_level = LEVEL_2; 3462 3463 // Default Security Mode 4 3464 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3465 3466 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3467 hci_stack->gap_required_encyrption_key_size = 7; 3468 3469 // Link Supervision Timeout 3470 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3471 3472 #endif 3473 3474 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3475 hci_stack->ssp_enable = 1; 3476 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3477 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3478 hci_stack->ssp_auto_accept = 1; 3479 3480 // Secure Connections: enable (requires support from Controller) 3481 hci_stack->secure_connections_enable = true; 3482 3483 // voice setting - signed 16 bit pcm data with CVSD over the air 3484 hci_stack->sco_voice_setting = 0x60; 3485 3486 #ifdef ENABLE_LE_CENTRAL 3487 // connection parameter to use for outgoing connections 3488 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3489 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3490 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3491 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3492 hci_stack->le_connection_latency = 4; // 4 3493 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3494 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3495 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3496 3497 // default LE Scanning 3498 hci_stack->le_scan_type = 0x1; // active 3499 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3500 hci_stack->le_scan_window = 0x30; // 30 ms 3501 #endif 3502 3503 #ifdef ENABLE_LE_PERIPHERAL 3504 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3505 #endif 3506 3507 // connection parameter range used to answer connection parameter update requests in l2cap 3508 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3509 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3510 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3511 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3512 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3513 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3514 3515 hci_state_reset(); 3516 } 3517 3518 void hci_deinit(void){ 3519 #ifdef HAVE_MALLOC 3520 if (hci_stack) { 3521 free(hci_stack); 3522 } 3523 #endif 3524 hci_stack = NULL; 3525 3526 #ifdef ENABLE_CLASSIC 3527 disable_l2cap_timeouts = 0; 3528 #endif 3529 } 3530 3531 /** 3532 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3533 */ 3534 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3535 hci_stack->chipset = chipset_driver; 3536 3537 // reset chipset driver - init is also called on power_up 3538 if (hci_stack->chipset && hci_stack->chipset->init){ 3539 hci_stack->chipset->init(hci_stack->config); 3540 } 3541 } 3542 3543 /** 3544 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3545 */ 3546 void hci_set_control(const btstack_control_t *hardware_control){ 3547 // references to used control implementation 3548 hci_stack->control = hardware_control; 3549 // init with transport config 3550 hardware_control->init(hci_stack->config); 3551 } 3552 3553 void hci_close(void){ 3554 3555 #ifdef ENABLE_CLASSIC 3556 // close remote device db 3557 if (hci_stack->link_key_db) { 3558 hci_stack->link_key_db->close(); 3559 } 3560 #endif 3561 3562 btstack_linked_list_iterator_t lit; 3563 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3564 while (btstack_linked_list_iterator_has_next(&lit)){ 3565 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3566 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3567 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3568 hci_shutdown_connection(connection); 3569 } 3570 3571 hci_power_control(HCI_POWER_OFF); 3572 3573 #ifdef HAVE_MALLOC 3574 free(hci_stack); 3575 #endif 3576 hci_stack = NULL; 3577 } 3578 3579 #ifdef HAVE_SCO_TRANSPORT 3580 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3581 hci_stack->sco_transport = sco_transport; 3582 sco_transport->register_packet_handler(&packet_handler); 3583 } 3584 #endif 3585 3586 #ifdef ENABLE_CLASSIC 3587 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3588 // validate ranage and set 3589 if (encryption_key_size < 7) return; 3590 if (encryption_key_size > 16) return; 3591 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3592 } 3593 3594 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3595 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3596 hci_stack->gap_security_mode = security_mode; 3597 return ERROR_CODE_SUCCESS; 3598 } else { 3599 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3600 } 3601 } 3602 3603 gap_security_mode_t gap_get_security_mode(void){ 3604 return hci_stack->gap_security_mode; 3605 } 3606 3607 void gap_set_security_level(gap_security_level_t security_level){ 3608 hci_stack->gap_security_level = security_level; 3609 } 3610 3611 gap_security_level_t gap_get_security_level(void){ 3612 if (hci_stack->gap_secure_connections_only_mode){ 3613 return LEVEL_4; 3614 } 3615 return hci_stack->gap_security_level; 3616 } 3617 3618 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3619 hci_stack->gap_minimal_service_security_level = security_level; 3620 } 3621 3622 void gap_set_secure_connections_only_mode(bool enable){ 3623 hci_stack->gap_secure_connections_only_mode = enable; 3624 } 3625 3626 bool gap_get_secure_connections_only_mode(void){ 3627 return hci_stack->gap_secure_connections_only_mode; 3628 } 3629 #endif 3630 3631 #ifdef ENABLE_CLASSIC 3632 void gap_set_class_of_device(uint32_t class_of_device){ 3633 hci_stack->class_of_device = class_of_device; 3634 } 3635 3636 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3637 hci_stack->default_link_policy_settings = default_link_policy_settings; 3638 } 3639 3640 void gap_set_allow_role_switch(bool allow_role_switch){ 3641 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3642 } 3643 3644 uint8_t hci_get_allow_role_switch(void){ 3645 return hci_stack->allow_role_switch; 3646 } 3647 3648 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3649 hci_stack->link_supervision_timeout = link_supervision_timeout; 3650 } 3651 3652 void hci_disable_l2cap_timeout_check(void){ 3653 disable_l2cap_timeouts = 1; 3654 } 3655 #endif 3656 3657 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3658 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3659 void hci_set_bd_addr(bd_addr_t addr){ 3660 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3661 hci_stack->custom_bd_addr_set = 1; 3662 } 3663 #endif 3664 3665 // State-Module-Driver overview 3666 // state module low-level 3667 // HCI_STATE_OFF off close 3668 // HCI_STATE_INITIALIZING, on open 3669 // HCI_STATE_WORKING, on open 3670 // HCI_STATE_HALTING, on open 3671 // HCI_STATE_SLEEPING, off/sleep close 3672 // HCI_STATE_FALLING_ASLEEP on open 3673 3674 static int hci_power_control_on(void){ 3675 3676 // power on 3677 int err = 0; 3678 if (hci_stack->control && hci_stack->control->on){ 3679 err = (*hci_stack->control->on)(); 3680 } 3681 if (err){ 3682 log_error( "POWER_ON failed"); 3683 hci_emit_hci_open_failed(); 3684 return err; 3685 } 3686 3687 // int chipset driver 3688 if (hci_stack->chipset && hci_stack->chipset->init){ 3689 hci_stack->chipset->init(hci_stack->config); 3690 } 3691 3692 // init transport 3693 if (hci_stack->hci_transport->init){ 3694 hci_stack->hci_transport->init(hci_stack->config); 3695 } 3696 3697 // open transport 3698 err = hci_stack->hci_transport->open(); 3699 if (err){ 3700 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3701 if (hci_stack->control && hci_stack->control->off){ 3702 (*hci_stack->control->off)(); 3703 } 3704 hci_emit_hci_open_failed(); 3705 return err; 3706 } 3707 return 0; 3708 } 3709 3710 static void hci_power_control_off(void){ 3711 3712 log_info("hci_power_control_off"); 3713 3714 // close low-level device 3715 hci_stack->hci_transport->close(); 3716 3717 log_info("hci_power_control_off - hci_transport closed"); 3718 3719 // power off 3720 if (hci_stack->control && hci_stack->control->off){ 3721 (*hci_stack->control->off)(); 3722 } 3723 3724 log_info("hci_power_control_off - control closed"); 3725 3726 hci_stack->state = HCI_STATE_OFF; 3727 } 3728 3729 static void hci_power_control_sleep(void){ 3730 3731 log_info("hci_power_control_sleep"); 3732 3733 #if 0 3734 // don't close serial port during sleep 3735 3736 // close low-level device 3737 hci_stack->hci_transport->close(hci_stack->config); 3738 #endif 3739 3740 // sleep mode 3741 if (hci_stack->control && hci_stack->control->sleep){ 3742 (*hci_stack->control->sleep)(); 3743 } 3744 3745 hci_stack->state = HCI_STATE_SLEEPING; 3746 } 3747 3748 static int hci_power_control_wake(void){ 3749 3750 log_info("hci_power_control_wake"); 3751 3752 // wake on 3753 if (hci_stack->control && hci_stack->control->wake){ 3754 (*hci_stack->control->wake)(); 3755 } 3756 3757 #if 0 3758 // open low-level device 3759 int err = hci_stack->hci_transport->open(hci_stack->config); 3760 if (err){ 3761 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3762 if (hci_stack->control && hci_stack->control->off){ 3763 (*hci_stack->control->off)(); 3764 } 3765 hci_emit_hci_open_failed(); 3766 return err; 3767 } 3768 #endif 3769 3770 return 0; 3771 } 3772 3773 static void hci_power_transition_to_initializing(void){ 3774 // set up state machine 3775 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3776 hci_stack->hci_packet_buffer_reserved = 0; 3777 hci_stack->state = HCI_STATE_INITIALIZING; 3778 hci_stack->substate = HCI_INIT_SEND_RESET; 3779 } 3780 3781 // returns error 3782 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3783 int err; 3784 switch (power_mode){ 3785 case HCI_POWER_ON: 3786 err = hci_power_control_on(); 3787 if (err != 0) { 3788 log_error("hci_power_control_on() error %d", err); 3789 return err; 3790 } 3791 hci_power_transition_to_initializing(); 3792 break; 3793 case HCI_POWER_OFF: 3794 // do nothing 3795 break; 3796 case HCI_POWER_SLEEP: 3797 // do nothing (with SLEEP == OFF) 3798 break; 3799 default: 3800 btstack_assert(false); 3801 break; 3802 } 3803 return ERROR_CODE_SUCCESS; 3804 } 3805 3806 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3807 switch (power_mode){ 3808 case HCI_POWER_ON: 3809 // do nothing 3810 break; 3811 case HCI_POWER_OFF: 3812 // no connections yet, just turn it off 3813 hci_power_control_off(); 3814 break; 3815 case HCI_POWER_SLEEP: 3816 // no connections yet, just turn it off 3817 hci_power_control_sleep(); 3818 break; 3819 default: 3820 btstack_assert(false); 3821 break; 3822 } 3823 return ERROR_CODE_SUCCESS; 3824 } 3825 3826 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3827 switch (power_mode){ 3828 case HCI_POWER_ON: 3829 // do nothing 3830 break; 3831 case HCI_POWER_OFF: 3832 // see hci_run 3833 hci_stack->state = HCI_STATE_HALTING; 3834 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3835 break; 3836 case HCI_POWER_SLEEP: 3837 // see hci_run 3838 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3839 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3840 break; 3841 default: 3842 btstack_assert(false); 3843 break; 3844 } 3845 return ERROR_CODE_SUCCESS; 3846 } 3847 3848 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3849 switch (power_mode){ 3850 case HCI_POWER_ON: 3851 hci_power_transition_to_initializing(); 3852 break; 3853 case HCI_POWER_OFF: 3854 // do nothing 3855 break; 3856 case HCI_POWER_SLEEP: 3857 // see hci_run 3858 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3859 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3860 break; 3861 default: 3862 btstack_assert(false); 3863 break; 3864 } 3865 return ERROR_CODE_SUCCESS; 3866 } 3867 3868 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3869 switch (power_mode){ 3870 case HCI_POWER_ON: 3871 3872 #ifdef HAVE_PLATFORM_IPHONE_OS 3873 // nothing to do, if H4 supports power management 3874 if (btstack_control_iphone_power_management_enabled()){ 3875 hci_stack->state = HCI_STATE_INITIALIZING; 3876 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3877 break; 3878 } 3879 #endif 3880 hci_power_transition_to_initializing(); 3881 break; 3882 case HCI_POWER_OFF: 3883 // see hci_run 3884 hci_stack->state = HCI_STATE_HALTING; 3885 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3886 break; 3887 case HCI_POWER_SLEEP: 3888 // do nothing 3889 break; 3890 default: 3891 btstack_assert(false); 3892 break; 3893 } 3894 return ERROR_CODE_SUCCESS; 3895 } 3896 3897 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3898 int err; 3899 switch (power_mode){ 3900 case HCI_POWER_ON: 3901 #ifdef HAVE_PLATFORM_IPHONE_OS 3902 // nothing to do, if H4 supports power management 3903 if (btstack_control_iphone_power_management_enabled()){ 3904 hci_stack->state = HCI_STATE_INITIALIZING; 3905 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3906 hci_update_scan_enable(); 3907 break; 3908 } 3909 #endif 3910 err = hci_power_control_wake(); 3911 if (err) return err; 3912 hci_power_transition_to_initializing(); 3913 break; 3914 case HCI_POWER_OFF: 3915 hci_stack->state = HCI_STATE_HALTING; 3916 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3917 break; 3918 case HCI_POWER_SLEEP: 3919 // do nothing 3920 break; 3921 default: 3922 btstack_assert(false); 3923 break; 3924 } 3925 return ERROR_CODE_SUCCESS; 3926 } 3927 3928 int hci_power_control(HCI_POWER_MODE power_mode){ 3929 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3930 int err = 0; 3931 switch (hci_stack->state){ 3932 case HCI_STATE_OFF: 3933 err = hci_power_control_state_off(power_mode); 3934 break; 3935 case HCI_STATE_INITIALIZING: 3936 err = hci_power_control_state_initializing(power_mode); 3937 break; 3938 case HCI_STATE_WORKING: 3939 err = hci_power_control_state_working(power_mode); 3940 break; 3941 case HCI_STATE_HALTING: 3942 err = hci_power_control_state_halting(power_mode); 3943 break; 3944 case HCI_STATE_FALLING_ASLEEP: 3945 err = hci_power_control_state_falling_asleep(power_mode); 3946 break; 3947 case HCI_STATE_SLEEPING: 3948 err = hci_power_control_state_sleeping(power_mode); 3949 break; 3950 default: 3951 btstack_assert(false); 3952 break; 3953 } 3954 if (err != 0){ 3955 return err; 3956 } 3957 3958 // create internal event 3959 hci_emit_state(); 3960 3961 // trigger next/first action 3962 hci_run(); 3963 3964 return 0; 3965 } 3966 3967 3968 #ifdef ENABLE_CLASSIC 3969 3970 static void hci_update_scan_enable(void){ 3971 // 2 = page scan, 1 = inq scan 3972 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3973 hci_run(); 3974 } 3975 3976 void gap_discoverable_control(uint8_t enable){ 3977 if (enable) enable = 1; // normalize argument 3978 3979 if (hci_stack->discoverable == enable){ 3980 hci_emit_discoverable_enabled(hci_stack->discoverable); 3981 return; 3982 } 3983 3984 hci_stack->discoverable = enable; 3985 hci_update_scan_enable(); 3986 } 3987 3988 void gap_connectable_control(uint8_t enable){ 3989 if (enable) enable = 1; // normalize argument 3990 3991 // don't emit event 3992 if (hci_stack->connectable == enable) return; 3993 3994 hci_stack->connectable = enable; 3995 hci_update_scan_enable(); 3996 } 3997 #endif 3998 3999 void gap_local_bd_addr(bd_addr_t address_buffer){ 4000 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4001 } 4002 4003 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4004 static void hci_host_num_completed_packets(void){ 4005 4006 // create packet manually as arrays are not supported and num_commands should not get reduced 4007 hci_reserve_packet_buffer(); 4008 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4009 4010 uint16_t size = 0; 4011 uint16_t num_handles = 0; 4012 packet[size++] = 0x35; 4013 packet[size++] = 0x0c; 4014 size++; // skip param len 4015 size++; // skip num handles 4016 4017 // add { handle, packets } entries 4018 btstack_linked_item_t * it; 4019 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4020 hci_connection_t * connection = (hci_connection_t *) it; 4021 if (connection->num_packets_completed){ 4022 little_endian_store_16(packet, size, connection->con_handle); 4023 size += 2; 4024 little_endian_store_16(packet, size, connection->num_packets_completed); 4025 size += 2; 4026 // 4027 num_handles++; 4028 connection->num_packets_completed = 0; 4029 } 4030 } 4031 4032 packet[2] = size - 3; 4033 packet[3] = num_handles; 4034 4035 hci_stack->host_completed_packets = 0; 4036 4037 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4038 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4039 4040 // release packet buffer for synchronous transport implementations 4041 if (hci_transport_synchronous()){ 4042 hci_release_packet_buffer(); 4043 hci_emit_transport_packet_sent(); 4044 } 4045 } 4046 #endif 4047 4048 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4049 UNUSED(ds); 4050 hci_stack->substate = HCI_HALTING_CLOSE; 4051 // allow packet handlers to defer final shutdown 4052 hci_emit_state(); 4053 hci_run(); 4054 } 4055 4056 static bool hci_run_acl_fragments(void){ 4057 if (hci_stack->acl_fragmentation_total_size > 0u) { 4058 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4059 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4060 if (connection) { 4061 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4062 hci_send_acl_packet_fragments(connection); 4063 return true; 4064 } 4065 } else { 4066 // connection gone -> discard further fragments 4067 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4068 hci_stack->acl_fragmentation_total_size = 0; 4069 hci_stack->acl_fragmentation_pos = 0; 4070 } 4071 } 4072 return false; 4073 } 4074 4075 #ifdef ENABLE_CLASSIC 4076 static bool hci_run_general_gap_classic(void){ 4077 4078 // decline incoming connections 4079 if (hci_stack->decline_reason){ 4080 uint8_t reason = hci_stack->decline_reason; 4081 hci_stack->decline_reason = 0; 4082 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4083 return true; 4084 } 4085 // write page scan activity 4086 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4087 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4088 hci_stack->new_page_scan_interval = 0xffff; 4089 hci_stack->new_page_scan_window = 0xffff; 4090 return true; 4091 } 4092 // write page scan type 4093 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4094 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4095 hci_stack->new_page_scan_type = 0xff; 4096 return true; 4097 } 4098 // send scan enable 4099 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4100 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4101 hci_stack->new_scan_enable_value = 0xff; 4102 return true; 4103 } 4104 // start/stop inquiry 4105 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4106 uint8_t duration = hci_stack->inquiry_state; 4107 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4108 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4109 return true; 4110 } 4111 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4112 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4113 hci_send_cmd(&hci_inquiry_cancel); 4114 return true; 4115 } 4116 // remote name request 4117 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4118 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4119 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4120 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4121 return true; 4122 } 4123 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4124 // Local OOB data 4125 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4126 hci_stack->classic_read_local_oob_data = false; 4127 if (hci_stack->local_supported_commands[1] & 0x10u){ 4128 hci_send_cmd(&hci_read_local_extended_oob_data); 4129 } else { 4130 hci_send_cmd(&hci_read_local_oob_data); 4131 } 4132 } 4133 #endif 4134 // pairing 4135 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4136 uint8_t state = hci_stack->gap_pairing_state; 4137 uint8_t pin_code[16]; 4138 switch (state){ 4139 case GAP_PAIRING_STATE_SEND_PIN: 4140 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4141 memset(pin_code, 0, 16); 4142 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4143 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4144 break; 4145 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4146 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4147 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4148 break; 4149 case GAP_PAIRING_STATE_SEND_PASSKEY: 4150 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4151 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4152 break; 4153 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4154 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4155 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4156 break; 4157 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4158 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4159 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4160 break; 4161 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4162 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4163 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4164 break; 4165 default: 4166 break; 4167 } 4168 return true; 4169 } 4170 return false; 4171 } 4172 #endif 4173 4174 #ifdef ENABLE_BLE 4175 static bool hci_run_general_gap_le(void){ 4176 4177 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4178 4179 if (hci_stack->state != HCI_STATE_WORKING) return false; 4180 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4181 4182 4183 // Phase 1: collect what to stop 4184 4185 bool scanning_stop = false; 4186 bool connecting_stop = false; 4187 bool advertising_stop = false; 4188 4189 #ifndef ENABLE_LE_CENTRAL 4190 UNUSED(scanning_stop); 4191 UNUSED(connecting_stop); 4192 #endif 4193 #ifndef ENABLE_LE_PERIPHERAL 4194 UNUSED(advertising_stop); 4195 #endif 4196 4197 // check if whitelist needs modification 4198 bool whitelist_modification_pending = false; 4199 btstack_linked_list_iterator_t lit; 4200 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4201 while (btstack_linked_list_iterator_has_next(&lit)){ 4202 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4203 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4204 whitelist_modification_pending = true; 4205 break; 4206 } 4207 } 4208 // check if resolving list needs modification 4209 bool resolving_list_modification_pending = false; 4210 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4211 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4212 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4213 resolving_list_modification_pending = true; 4214 } 4215 #endif 4216 4217 #ifdef ENABLE_LE_CENTRAL 4218 // scanning control 4219 if (hci_stack->le_scanning_active) { 4220 // stop if: 4221 // - parameter change required 4222 // - it's disabled 4223 // - whitelist change required but used for scanning 4224 // - resolving list modified 4225 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4226 if ((hci_stack->le_scanning_param_update) || 4227 !hci_stack->le_scanning_enabled || 4228 scanning_uses_whitelist || 4229 resolving_list_modification_pending){ 4230 4231 scanning_stop = true; 4232 } 4233 } 4234 #endif 4235 4236 #ifdef ENABLE_LE_CENTRAL 4237 // connecting control 4238 bool connecting_with_whitelist; 4239 switch (hci_stack->le_connecting_state){ 4240 case LE_CONNECTING_DIRECT: 4241 case LE_CONNECTING_WHITELIST: 4242 // stop connecting if: 4243 // - connecting uses white and whitelist modification pending 4244 // - if it got disabled 4245 // - resolving list modified 4246 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4247 if ((connecting_with_whitelist && whitelist_modification_pending) || 4248 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4249 resolving_list_modification_pending) { 4250 4251 connecting_stop = true; 4252 } 4253 break; 4254 default: 4255 break; 4256 } 4257 #endif 4258 4259 #ifdef ENABLE_LE_PERIPHERAL 4260 // le advertisement control 4261 if (hci_stack->le_advertisements_active){ 4262 // stop if: 4263 // - parameter change required 4264 // - it's disabled 4265 // - whitelist change required but used for advertisement filter policy 4266 // - resolving list modified 4267 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4268 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4269 if (advertising_change || 4270 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4271 (advertising_uses_whitelist & whitelist_modification_pending) || 4272 resolving_list_modification_pending) { 4273 4274 advertising_stop = true; 4275 } 4276 } 4277 #endif 4278 4279 4280 // Phase 2: stop everything that should be off during modifications 4281 4282 #ifdef ENABLE_LE_CENTRAL 4283 if (scanning_stop){ 4284 hci_stack->le_scanning_active = false; 4285 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4286 return true; 4287 } 4288 #endif 4289 4290 #ifdef ENABLE_LE_CENTRAL 4291 if (connecting_stop){ 4292 hci_send_cmd(&hci_le_create_connection_cancel); 4293 return true; 4294 } 4295 #endif 4296 4297 #ifdef ENABLE_LE_PERIPHERAL 4298 if (advertising_stop){ 4299 hci_stack->le_advertisements_active = false; 4300 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4301 return true; 4302 } 4303 #endif 4304 4305 // Phase 3: modify 4306 4307 #ifdef ENABLE_LE_CENTRAL 4308 if (hci_stack->le_scanning_param_update){ 4309 hci_stack->le_scanning_param_update = false; 4310 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4311 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4312 return true; 4313 } 4314 #endif 4315 4316 #ifdef ENABLE_LE_PERIPHERAL 4317 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4318 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4319 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4320 hci_send_cmd(&hci_le_set_advertising_parameters, 4321 hci_stack->le_advertisements_interval_min, 4322 hci_stack->le_advertisements_interval_max, 4323 hci_stack->le_advertisements_type, 4324 hci_stack->le_advertisements_own_addr_type, 4325 hci_stack->le_advertisements_direct_address_type, 4326 hci_stack->le_advertisements_direct_address, 4327 hci_stack->le_advertisements_channel_map, 4328 hci_stack->le_advertisements_filter_policy); 4329 return true; 4330 } 4331 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4332 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4333 uint8_t adv_data_clean[31]; 4334 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4335 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4336 hci_stack->le_advertisements_data_len); 4337 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4338 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4339 return true; 4340 } 4341 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4342 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4343 uint8_t scan_data_clean[31]; 4344 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4345 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4346 hci_stack->le_scan_response_data_len); 4347 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4348 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4349 return true; 4350 } 4351 #endif 4352 4353 4354 #ifdef ENABLE_LE_CENTRAL 4355 // if connect with whitelist was active and is not cancelled yet, wait until next time 4356 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4357 #endif 4358 4359 // LE Whitelist Management 4360 if (whitelist_modification_pending){ 4361 // add/remove entries 4362 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4363 while (btstack_linked_list_iterator_has_next(&lit)){ 4364 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4365 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4366 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4367 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4368 return true; 4369 } 4370 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4371 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4372 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4373 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4374 return true; 4375 } 4376 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4377 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4378 btstack_memory_whitelist_entry_free(entry); 4379 } 4380 } 4381 } 4382 4383 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4384 // LE Resolving List Management 4385 if (resolving_list_supported) { 4386 uint16_t i; 4387 switch (hci_stack->le_resolving_list_state) { 4388 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4389 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4390 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4391 return true; 4392 case LE_RESOLVING_LIST_READ_SIZE: 4393 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4394 hci_send_cmd(&hci_le_read_resolving_list_size); 4395 return true; 4396 case LE_RESOLVING_LIST_SEND_CLEAR: 4397 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4398 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4399 sizeof(hci_stack->le_resolving_list_add_entries)); 4400 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4401 sizeof(hci_stack->le_resolving_list_remove_entries)); 4402 hci_send_cmd(&hci_le_clear_resolving_list); 4403 return true; 4404 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4405 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4406 uint8_t offset = i >> 3; 4407 uint8_t mask = 1 << (i & 7); 4408 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4409 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4410 bd_addr_t peer_identity_addreses; 4411 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4412 sm_key_t peer_irk; 4413 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4414 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4415 4416 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4417 // trigger whitelist entry 'update' (work around for controller bug) 4418 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4419 while (btstack_linked_list_iterator_has_next(&lit)) { 4420 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4421 if (entry->address_type != peer_identity_addr_type) continue; 4422 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4423 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4424 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4425 } 4426 #endif 4427 4428 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4429 peer_identity_addreses); 4430 return true; 4431 } 4432 4433 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4434 4435 /* fall through */ 4436 4437 case LE_RESOLVING_LIST_ADD_ENTRIES: 4438 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4439 uint8_t offset = i >> 3; 4440 uint8_t mask = 1 << (i & 7); 4441 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4442 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4443 bd_addr_t peer_identity_addreses; 4444 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4445 sm_key_t peer_irk; 4446 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4447 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4448 const uint8_t *local_irk = gap_get_persistent_irk(); 4449 // command uses format specifier 'P' that stores 16-byte value without flip 4450 uint8_t local_irk_flipped[16]; 4451 uint8_t peer_irk_flipped[16]; 4452 reverse_128(local_irk, local_irk_flipped); 4453 reverse_128(peer_irk, peer_irk_flipped); 4454 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4455 peer_irk_flipped, local_irk_flipped); 4456 return true; 4457 } 4458 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4459 break; 4460 4461 default: 4462 break; 4463 } 4464 } 4465 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4466 #endif 4467 4468 // Phase 4: restore state 4469 4470 #ifdef ENABLE_LE_CENTRAL 4471 // re-start scanning 4472 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4473 hci_stack->le_scanning_active = true; 4474 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4475 return true; 4476 } 4477 #endif 4478 4479 #ifdef ENABLE_LE_CENTRAL 4480 // re-start connecting 4481 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4482 bd_addr_t null_addr; 4483 memset(null_addr, 0, 6); 4484 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4485 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4486 hci_send_cmd(&hci_le_create_connection, 4487 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4488 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4489 1, // use whitelist 4490 0, // peer address type 4491 null_addr, // peer bd addr 4492 hci_stack->le_connection_own_addr_type, // our addr type: 4493 hci_stack->le_connection_interval_min, // conn interval min 4494 hci_stack->le_connection_interval_max, // conn interval max 4495 hci_stack->le_connection_latency, // conn latency 4496 hci_stack->le_supervision_timeout, // conn latency 4497 hci_stack->le_minimum_ce_length, // min ce length 4498 hci_stack->le_maximum_ce_length // max ce length 4499 ); 4500 return true; 4501 } 4502 #endif 4503 4504 #ifdef ENABLE_LE_PERIPHERAL 4505 // re-start advertising 4506 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4507 // check if advertisements should be enabled given 4508 hci_stack->le_advertisements_active = true; 4509 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4510 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4511 return true; 4512 } 4513 #endif 4514 4515 return false; 4516 } 4517 #endif 4518 4519 static bool hci_run_general_pending_commands(void){ 4520 btstack_linked_item_t * it; 4521 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4522 hci_connection_t * connection = (hci_connection_t *) it; 4523 4524 switch(connection->state){ 4525 case SEND_CREATE_CONNECTION: 4526 switch(connection->address_type){ 4527 #ifdef ENABLE_CLASSIC 4528 case BD_ADDR_TYPE_ACL: 4529 log_info("sending hci_create_connection"); 4530 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4531 break; 4532 #endif 4533 default: 4534 #ifdef ENABLE_BLE 4535 #ifdef ENABLE_LE_CENTRAL 4536 log_info("sending hci_le_create_connection"); 4537 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4538 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4539 hci_send_cmd(&hci_le_create_connection, 4540 hci_stack->le_connection_scan_interval, // conn scan interval 4541 hci_stack->le_connection_scan_window, // conn scan windows 4542 0, // don't use whitelist 4543 connection->address_type, // peer address type 4544 connection->address, // peer bd addr 4545 hci_stack->le_connection_own_addr_type, // our addr type: 4546 hci_stack->le_connection_interval_min, // conn interval min 4547 hci_stack->le_connection_interval_max, // conn interval max 4548 hci_stack->le_connection_latency, // conn latency 4549 hci_stack->le_supervision_timeout, // conn latency 4550 hci_stack->le_minimum_ce_length, // min ce length 4551 hci_stack->le_maximum_ce_length // max ce length 4552 ); 4553 connection->state = SENT_CREATE_CONNECTION; 4554 #endif 4555 #endif 4556 break; 4557 } 4558 return true; 4559 4560 #ifdef ENABLE_CLASSIC 4561 case RECEIVED_CONNECTION_REQUEST: 4562 connection->role = HCI_ROLE_SLAVE; 4563 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4564 log_info("sending hci_accept_connection_request"); 4565 connection->state = ACCEPTED_CONNECTION_REQUEST; 4566 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4567 } 4568 return true; 4569 #endif 4570 4571 #ifdef ENABLE_BLE 4572 #ifdef ENABLE_LE_CENTRAL 4573 case SEND_CANCEL_CONNECTION: 4574 connection->state = SENT_CANCEL_CONNECTION; 4575 hci_send_cmd(&hci_le_create_connection_cancel); 4576 return true; 4577 #endif 4578 #endif 4579 case SEND_DISCONNECT: 4580 connection->state = SENT_DISCONNECT; 4581 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4582 return true; 4583 4584 default: 4585 break; 4586 } 4587 4588 // no further commands if connection is about to get shut down 4589 if (connection->state == SENT_DISCONNECT) continue; 4590 4591 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4592 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4593 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4594 return true; 4595 } 4596 4597 #ifdef ENABLE_CLASSIC 4598 4599 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4600 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4601 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4602 return true; 4603 } 4604 4605 // Handling link key request requires remote supported features 4606 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4607 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4608 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4609 4610 // lookup link key using cached key first 4611 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4612 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4613 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4614 } 4615 4616 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4617 if (have_link_key && security_level_sufficient){ 4618 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4619 } else { 4620 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4621 } 4622 return true; 4623 } 4624 4625 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4626 log_info("denying to pin request"); 4627 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4628 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4629 return true; 4630 } 4631 4632 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4633 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4634 // set authentication requirements: 4635 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4636 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4637 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4638 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4639 authreq |= 1; 4640 } 4641 bool bonding = hci_stack->bondable; 4642 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4643 // if we have received IO Cap Response, we're in responder role 4644 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4645 if (bonding && !remote_bonding){ 4646 log_info("Remote not bonding, dropping local flag"); 4647 bonding = false; 4648 } 4649 } 4650 if (bonding){ 4651 if (connection->bonding_flags & BONDING_DEDICATED){ 4652 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4653 } else { 4654 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4655 } 4656 } 4657 uint8_t have_oob_data = 0; 4658 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4659 if (connection->classic_oob_c_192 != NULL){ 4660 have_oob_data |= 1; 4661 } 4662 if (connection->classic_oob_c_256 != NULL){ 4663 have_oob_data |= 2; 4664 } 4665 #endif 4666 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4667 return true; 4668 } 4669 4670 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4671 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4672 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4673 return true; 4674 } 4675 4676 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4677 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4678 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4679 const uint8_t zero[16] = { 0 }; 4680 const uint8_t * r_192 = zero; 4681 const uint8_t * c_192 = zero; 4682 const uint8_t * r_256 = zero; 4683 const uint8_t * c_256 = zero; 4684 // verify P-256 OOB 4685 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4686 c_256 = connection->classic_oob_c_256; 4687 if (connection->classic_oob_r_256 != NULL) { 4688 r_256 = connection->classic_oob_r_256; 4689 } 4690 } 4691 // verify P-192 OOB 4692 if ((connection->classic_oob_c_192 != NULL)) { 4693 c_192 = connection->classic_oob_c_192; 4694 if (connection->classic_oob_r_192 != NULL) { 4695 r_192 = connection->classic_oob_r_192; 4696 } 4697 } 4698 4699 // assess security 4700 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4701 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4702 if (need_level_4 && !can_reach_level_4){ 4703 log_info("Level 4 required, but not possible -> abort"); 4704 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4705 // send oob negative reply 4706 c_256 = NULL; 4707 c_192 = NULL; 4708 } 4709 4710 // Reply 4711 if (c_256 != zero) { 4712 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4713 } else if (c_192 != zero){ 4714 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4715 } else { 4716 hci_stack->classic_oob_con_handle = connection->con_handle; 4717 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4718 } 4719 return true; 4720 } 4721 #endif 4722 4723 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4724 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4725 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4726 return true; 4727 } 4728 4729 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4730 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4731 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4732 return true; 4733 } 4734 4735 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4736 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4737 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4738 return true; 4739 } 4740 4741 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4742 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4743 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4744 return true; 4745 } 4746 4747 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4748 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4749 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4750 return true; 4751 } 4752 4753 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4754 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4755 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4756 return true; 4757 } 4758 4759 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4760 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4761 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4762 connection->state = SENT_DISCONNECT; 4763 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4764 return true; 4765 } 4766 4767 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4768 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4769 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4770 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4771 return true; 4772 } 4773 4774 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4775 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4776 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4777 return true; 4778 } 4779 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4780 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4781 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4782 return true; 4783 } 4784 #endif 4785 4786 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4787 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4788 #ifdef ENABLE_CLASSIC 4789 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4790 #endif 4791 if (connection->state != SENT_DISCONNECT){ 4792 connection->state = SENT_DISCONNECT; 4793 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4794 return true; 4795 } 4796 } 4797 4798 #ifdef ENABLE_CLASSIC 4799 uint16_t sniff_min_interval; 4800 switch (connection->sniff_min_interval){ 4801 case 0: 4802 break; 4803 case 0xffff: 4804 connection->sniff_min_interval = 0; 4805 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4806 return true; 4807 default: 4808 sniff_min_interval = connection->sniff_min_interval; 4809 connection->sniff_min_interval = 0; 4810 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4811 return true; 4812 } 4813 4814 if (connection->sniff_subrating_max_latency != 0xffff){ 4815 uint16_t max_latency = connection->sniff_subrating_max_latency; 4816 connection->sniff_subrating_max_latency = 0; 4817 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4818 return true; 4819 } 4820 4821 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4822 uint8_t service_type = (uint8_t) connection->qos_service_type; 4823 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4824 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); 4825 return true; 4826 } 4827 4828 if (connection->request_role != HCI_ROLE_INVALID){ 4829 hci_role_t role = connection->request_role; 4830 connection->request_role = HCI_ROLE_INVALID; 4831 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4832 return true; 4833 } 4834 #endif 4835 4836 #ifdef ENABLE_BLE 4837 switch (connection->le_con_parameter_update_state){ 4838 // response to L2CAP CON PARAMETER UPDATE REQUEST 4839 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4840 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4841 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4842 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4843 0x0000, 0xffff); 4844 return true; 4845 case CON_PARAMETER_UPDATE_REPLY: 4846 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4847 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4848 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4849 0x0000, 0xffff); 4850 return true; 4851 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4852 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4853 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4854 return true; 4855 default: 4856 break; 4857 } 4858 if (connection->le_phy_update_all_phys != 0xffu){ 4859 uint8_t all_phys = connection->le_phy_update_all_phys; 4860 connection->le_phy_update_all_phys = 0xff; 4861 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); 4862 return true; 4863 } 4864 #endif 4865 } 4866 return false; 4867 } 4868 4869 static void hci_run(void){ 4870 4871 bool done; 4872 4873 // send continuation fragments first, as they block the prepared packet buffer 4874 done = hci_run_acl_fragments(); 4875 if (done) return; 4876 4877 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4878 // send host num completed packets next as they don't require num_cmd_packets > 0 4879 if (!hci_can_send_comand_packet_transport()) return; 4880 if (hci_stack->host_completed_packets){ 4881 hci_host_num_completed_packets(); 4882 return; 4883 } 4884 #endif 4885 4886 if (!hci_can_send_command_packet_now()) return; 4887 4888 // global/non-connection oriented commands 4889 4890 4891 #ifdef ENABLE_CLASSIC 4892 // general gap classic 4893 done = hci_run_general_gap_classic(); 4894 if (done) return; 4895 #endif 4896 4897 #ifdef ENABLE_BLE 4898 // general gap le 4899 done = hci_run_general_gap_le(); 4900 if (done) return; 4901 #endif 4902 4903 // send pending HCI commands 4904 done = hci_run_general_pending_commands(); 4905 if (done) return; 4906 4907 // stack state sub statemachines 4908 hci_connection_t * connection; 4909 switch (hci_stack->state){ 4910 case HCI_STATE_INITIALIZING: 4911 hci_initializing_run(); 4912 break; 4913 4914 case HCI_STATE_HALTING: 4915 4916 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4917 switch (hci_stack->substate){ 4918 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4919 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4920 4921 #ifdef ENABLE_BLE 4922 #ifdef ENABLE_LE_CENTRAL 4923 // free whitelist entries 4924 { 4925 btstack_linked_list_iterator_t lit; 4926 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4927 while (btstack_linked_list_iterator_has_next(&lit)){ 4928 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4929 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4930 btstack_memory_whitelist_entry_free(entry); 4931 } 4932 } 4933 #endif 4934 #endif 4935 // close all open connections 4936 connection = (hci_connection_t *) hci_stack->connections; 4937 if (connection){ 4938 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4939 if (!hci_can_send_command_packet_now()) return; 4940 4941 // check state 4942 if (connection->state == SENT_DISCONNECT) return; 4943 connection->state = SENT_DISCONNECT; 4944 4945 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4946 4947 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4948 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4949 4950 // ... which would be ignored anyway as we shutdown (free) the connection now 4951 hci_shutdown_connection(connection); 4952 4953 // finally, send the disconnect command 4954 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4955 return; 4956 } 4957 4958 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4959 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4960 log_info("HCI_STATE_HALTING: wait 50 ms"); 4961 hci_stack->substate = HCI_HALTING_W4_TIMER; 4962 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4963 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4964 btstack_run_loop_add_timer(&hci_stack->timeout); 4965 break; 4966 } 4967 4968 /* fall through */ 4969 4970 case HCI_HALTING_CLOSE: 4971 log_info("HCI_STATE_HALTING, calling off"); 4972 4973 // switch mode 4974 hci_power_control_off(); 4975 4976 log_info("HCI_STATE_HALTING, emitting state"); 4977 hci_emit_state(); 4978 log_info("HCI_STATE_HALTING, done"); 4979 break; 4980 4981 case HCI_HALTING_W4_TIMER: 4982 // keep waiting 4983 4984 break; 4985 default: 4986 break; 4987 } 4988 4989 break; 4990 4991 case HCI_STATE_FALLING_ASLEEP: 4992 switch(hci_stack->substate) { 4993 case HCI_FALLING_ASLEEP_DISCONNECT: 4994 log_info("HCI_STATE_FALLING_ASLEEP"); 4995 // close all open connections 4996 connection = (hci_connection_t *) hci_stack->connections; 4997 4998 #ifdef HAVE_PLATFORM_IPHONE_OS 4999 // don't close connections, if H4 supports power management 5000 if (btstack_control_iphone_power_management_enabled()){ 5001 connection = NULL; 5002 } 5003 #endif 5004 if (connection){ 5005 5006 // send disconnect 5007 if (!hci_can_send_command_packet_now()) return; 5008 5009 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5010 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5011 5012 // send disconnected event right away - causes higher layer connections to get closed, too. 5013 hci_shutdown_connection(connection); 5014 return; 5015 } 5016 5017 if (hci_classic_supported()){ 5018 // disable page and inquiry scan 5019 if (!hci_can_send_command_packet_now()) return; 5020 5021 log_info("HCI_STATE_HALTING, disabling inq scans"); 5022 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5023 5024 // continue in next sub state 5025 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5026 break; 5027 } 5028 5029 /* fall through */ 5030 5031 case HCI_FALLING_ASLEEP_COMPLETE: 5032 log_info("HCI_STATE_HALTING, calling sleep"); 5033 #ifdef HAVE_PLATFORM_IPHONE_OS 5034 // don't actually go to sleep, if H4 supports power management 5035 if (btstack_control_iphone_power_management_enabled()){ 5036 // SLEEP MODE reached 5037 hci_stack->state = HCI_STATE_SLEEPING; 5038 hci_emit_state(); 5039 break; 5040 } 5041 #endif 5042 // switch mode 5043 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5044 hci_emit_state(); 5045 break; 5046 5047 default: 5048 break; 5049 } 5050 break; 5051 5052 default: 5053 break; 5054 } 5055 } 5056 5057 int hci_send_cmd_packet(uint8_t *packet, int size){ 5058 // house-keeping 5059 5060 #ifdef ENABLE_CLASSIC 5061 bd_addr_t addr; 5062 hci_connection_t * conn; 5063 #endif 5064 #ifdef ENABLE_LE_CENTRAL 5065 uint8_t initiator_filter_policy; 5066 #endif 5067 5068 uint16_t opcode = little_endian_read_16(packet, 0); 5069 switch (opcode) { 5070 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5071 hci_stack->loopback_mode = packet[3]; 5072 break; 5073 5074 #ifdef ENABLE_CLASSIC 5075 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5076 reverse_bd_addr(&packet[3], addr); 5077 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5078 5079 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5080 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5081 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5082 return -1; 5083 } 5084 5085 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5086 if (!conn) { 5087 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5088 if (!conn) { 5089 // notify client that alloc failed 5090 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5091 return -1; // packet not sent to controller 5092 } 5093 conn->state = SEND_CREATE_CONNECTION; 5094 conn->role = HCI_ROLE_MASTER; 5095 } 5096 log_info("conn state %u", conn->state); 5097 switch (conn->state) { 5098 // if connection active exists 5099 case OPEN: 5100 // and OPEN, emit connection complete command 5101 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5102 return -1; // packet not sent to controller 5103 case RECEIVED_DISCONNECTION_COMPLETE: 5104 // create connection triggered in disconnect complete event, let's do it now 5105 break; 5106 case SEND_CREATE_CONNECTION: 5107 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5108 break; 5109 default: 5110 // otherwise, just ignore as it is already in the open process 5111 return -1; // packet not sent to controller 5112 } 5113 conn->state = SENT_CREATE_CONNECTION; 5114 5115 // track outgoing connection 5116 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5117 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5118 break; 5119 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5120 if (hci_stack->link_key_db) { 5121 reverse_bd_addr(&packet[3], addr); 5122 hci_stack->link_key_db->delete_link_key(addr); 5123 } 5124 break; 5125 5126 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5127 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5128 // setup_synchronous_connection? Voice setting at offset 22 5129 // TODO: compare to current setting if sco connection already active 5130 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5131 break; 5132 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5133 // accept_synchronus_connection? Voice setting at offset 18 5134 // TODO: compare to current setting if sco connection already active 5135 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5136 break; 5137 #endif 5138 #endif 5139 5140 #ifdef ENABLE_BLE 5141 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5142 hci_stack->le_random_address_set = 1; 5143 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5144 break; 5145 #ifdef ENABLE_LE_PERIPHERAL 5146 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5147 hci_stack->le_advertisements_active = packet[3] != 0; 5148 break; 5149 #endif 5150 #ifdef ENABLE_LE_CENTRAL 5151 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5152 // white list used? 5153 initiator_filter_policy = packet[7]; 5154 switch (initiator_filter_policy) { 5155 case 0: 5156 // whitelist not used 5157 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5158 break; 5159 case 1: 5160 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5161 break; 5162 default: 5163 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5164 break; 5165 } 5166 // track outgoing connection 5167 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5168 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5169 break; 5170 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5171 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5172 break; 5173 #endif 5174 #endif 5175 default: 5176 break; 5177 } 5178 5179 hci_stack->num_cmd_packets--; 5180 5181 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5182 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5183 } 5184 5185 // disconnect because of security block 5186 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5187 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5188 if (!connection) return; 5189 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5190 } 5191 5192 5193 // Configure Secure Simple Pairing 5194 5195 #ifdef ENABLE_CLASSIC 5196 5197 // enable will enable SSP during init 5198 void gap_ssp_set_enable(int enable){ 5199 hci_stack->ssp_enable = enable; 5200 } 5201 5202 static int hci_local_ssp_activated(void){ 5203 return gap_ssp_supported() && hci_stack->ssp_enable; 5204 } 5205 5206 // if set, BTstack will respond to io capability request using authentication requirement 5207 void gap_ssp_set_io_capability(int io_capability){ 5208 hci_stack->ssp_io_capability = io_capability; 5209 } 5210 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5211 hci_stack->ssp_authentication_requirement = authentication_requirement; 5212 } 5213 5214 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5215 void gap_ssp_set_auto_accept(int auto_accept){ 5216 hci_stack->ssp_auto_accept = auto_accept; 5217 } 5218 5219 void gap_secure_connections_enable(bool enable){ 5220 hci_stack->secure_connections_enable = enable; 5221 } 5222 5223 #endif 5224 5225 // va_list part of hci_send_cmd 5226 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5227 if (!hci_can_send_command_packet_now()){ 5228 log_error("hci_send_cmd called but cannot send packet now"); 5229 return 0; 5230 } 5231 5232 // for HCI INITIALIZATION 5233 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5234 hci_stack->last_cmd_opcode = cmd->opcode; 5235 5236 hci_reserve_packet_buffer(); 5237 uint8_t * packet = hci_stack->hci_packet_buffer; 5238 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5239 int err = hci_send_cmd_packet(packet, size); 5240 5241 // release packet buffer on error or for synchronous transport implementations 5242 if ((err < 0) || hci_transport_synchronous()){ 5243 hci_release_packet_buffer(); 5244 hci_emit_transport_packet_sent(); 5245 } 5246 5247 return err; 5248 } 5249 5250 /** 5251 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5252 */ 5253 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5254 va_list argptr; 5255 va_start(argptr, cmd); 5256 int res = hci_send_cmd_va_arg(cmd, argptr); 5257 va_end(argptr); 5258 return res; 5259 } 5260 5261 // Create various non-HCI events. 5262 // TODO: generalize, use table similar to hci_create_command 5263 5264 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5265 // dump packet 5266 if (dump) { 5267 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5268 } 5269 5270 // dispatch to all event handlers 5271 btstack_linked_list_iterator_t it; 5272 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5273 while (btstack_linked_list_iterator_has_next(&it)){ 5274 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5275 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5276 } 5277 } 5278 5279 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5280 if (!hci_stack->acl_packet_handler) return; 5281 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5282 } 5283 5284 #ifdef ENABLE_CLASSIC 5285 static void hci_notify_if_sco_can_send_now(void){ 5286 // notify SCO sender if waiting 5287 if (!hci_stack->sco_waiting_for_can_send_now) return; 5288 if (hci_can_send_sco_packet_now()){ 5289 hci_stack->sco_waiting_for_can_send_now = 0; 5290 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5291 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5292 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5293 } 5294 } 5295 5296 // parsing end emitting has been merged to reduce code size 5297 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5298 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5299 5300 uint8_t * eir_data; 5301 ad_context_t context; 5302 const uint8_t * name; 5303 uint8_t name_len; 5304 5305 if (size < 3) return; 5306 5307 int event_type = hci_event_packet_get_type(packet); 5308 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5309 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5310 5311 switch (event_type){ 5312 case HCI_EVENT_INQUIRY_RESULT: 5313 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5314 if (size != (3 + (num_responses * 14))) return; 5315 break; 5316 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5317 if (size != 257) return; 5318 if (num_responses != 1) return; 5319 break; 5320 default: 5321 return; 5322 } 5323 5324 // event[1] is set at the end 5325 int i; 5326 for (i=0; i<num_responses;i++){ 5327 memset(event, 0, sizeof(event)); 5328 event[0] = GAP_EVENT_INQUIRY_RESULT; 5329 uint8_t event_size = 27; // if name is not set by EIR 5330 5331 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5332 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5333 (void)memcpy(&event[9], 5334 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5335 3); // class of device 5336 (void)memcpy(&event[12], 5337 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5338 2); // clock offset 5339 5340 switch (event_type){ 5341 case HCI_EVENT_INQUIRY_RESULT: 5342 // 14,15,16,17 = 0, size 18 5343 break; 5344 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5345 event[14] = 1; 5346 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5347 // 16,17 = 0, size 18 5348 break; 5349 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5350 event[14] = 1; 5351 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5352 // EIR packets only contain a single inquiry response 5353 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5354 name = NULL; 5355 // Iterate over EIR data 5356 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5357 uint8_t data_type = ad_iterator_get_data_type(&context); 5358 uint8_t data_size = ad_iterator_get_data_len(&context); 5359 const uint8_t * data = ad_iterator_get_data(&context); 5360 // Prefer Complete Local Name over Shortened Local Name 5361 switch (data_type){ 5362 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5363 if (name) continue; 5364 /* fall through */ 5365 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5366 name = data; 5367 name_len = data_size; 5368 break; 5369 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5370 if (data_size != 8) break; 5371 event[16] = 1; 5372 memcpy(&event[17], data, 8); 5373 break; 5374 default: 5375 break; 5376 } 5377 } 5378 if (name){ 5379 event[25] = 1; 5380 // truncate name if needed 5381 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5382 event[26] = len; 5383 (void)memcpy(&event[27], name, len); 5384 event_size += len; 5385 } 5386 break; 5387 default: 5388 return; 5389 } 5390 event[1] = event_size - 2; 5391 hci_emit_event(event, event_size, 1); 5392 } 5393 } 5394 #endif 5395 5396 void hci_emit_state(void){ 5397 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5398 uint8_t event[3]; 5399 event[0] = BTSTACK_EVENT_STATE; 5400 event[1] = sizeof(event) - 2u; 5401 event[2] = hci_stack->state; 5402 hci_emit_event(event, sizeof(event), 1); 5403 } 5404 5405 #ifdef ENABLE_CLASSIC 5406 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5407 uint8_t event[13]; 5408 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5409 event[1] = sizeof(event) - 2; 5410 event[2] = status; 5411 little_endian_store_16(event, 3, con_handle); 5412 reverse_bd_addr(address, &event[5]); 5413 event[11] = 1; // ACL connection 5414 event[12] = 0; // encryption disabled 5415 hci_emit_event(event, sizeof(event), 1); 5416 } 5417 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5418 if (disable_l2cap_timeouts) return; 5419 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5420 uint8_t event[4]; 5421 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5422 event[1] = sizeof(event) - 2; 5423 little_endian_store_16(event, 2, conn->con_handle); 5424 hci_emit_event(event, sizeof(event), 1); 5425 } 5426 #endif 5427 5428 #ifdef ENABLE_BLE 5429 #ifdef ENABLE_LE_CENTRAL 5430 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){ 5431 uint8_t event[21]; 5432 event[0] = HCI_EVENT_LE_META; 5433 event[1] = sizeof(event) - 2u; 5434 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5435 event[3] = status; 5436 little_endian_store_16(event, 4, con_handle); 5437 event[6] = 0; // TODO: role 5438 event[7] = address_type; 5439 reverse_bd_addr(address, &event[8]); 5440 little_endian_store_16(event, 14, 0); // interval 5441 little_endian_store_16(event, 16, 0); // latency 5442 little_endian_store_16(event, 18, 0); // supervision timeout 5443 event[20] = 0; // master clock accuracy 5444 hci_emit_event(event, sizeof(event), 1); 5445 } 5446 #endif 5447 #endif 5448 5449 static void hci_emit_transport_packet_sent(void){ 5450 // notify upper stack that it might be possible to send again 5451 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5452 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5453 } 5454 5455 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5456 uint8_t event[6]; 5457 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5458 event[1] = sizeof(event) - 2u; 5459 event[2] = 0; // status = OK 5460 little_endian_store_16(event, 3, con_handle); 5461 event[5] = reason; 5462 hci_emit_event(event, sizeof(event), 1); 5463 } 5464 5465 static void hci_emit_nr_connections_changed(void){ 5466 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5467 uint8_t event[3]; 5468 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5469 event[1] = sizeof(event) - 2u; 5470 event[2] = nr_hci_connections(); 5471 hci_emit_event(event, sizeof(event), 1); 5472 } 5473 5474 static void hci_emit_hci_open_failed(void){ 5475 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5476 uint8_t event[2]; 5477 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5478 event[1] = sizeof(event) - 2u; 5479 hci_emit_event(event, sizeof(event), 1); 5480 } 5481 5482 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5483 log_info("hci_emit_dedicated_bonding_result %u ", status); 5484 uint8_t event[9]; 5485 int pos = 0; 5486 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5487 event[pos++] = sizeof(event) - 2u; 5488 event[pos++] = status; 5489 reverse_bd_addr(address, &event[pos]); 5490 hci_emit_event(event, sizeof(event), 1); 5491 } 5492 5493 5494 #ifdef ENABLE_CLASSIC 5495 5496 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5497 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5498 uint8_t event[5]; 5499 int pos = 0; 5500 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5501 event[pos++] = sizeof(event) - 2; 5502 little_endian_store_16(event, 2, con_handle); 5503 pos += 2; 5504 event[pos++] = level; 5505 hci_emit_event(event, sizeof(event), 1); 5506 } 5507 5508 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5509 if (!connection) return LEVEL_0; 5510 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5511 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5512 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5513 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5514 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5515 // LEVEL 4 always requires 128 bit encrytion key size 5516 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5517 security_level = LEVEL_3; 5518 } 5519 return security_level; 5520 } 5521 5522 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5523 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5524 uint8_t event[3]; 5525 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5526 event[1] = sizeof(event) - 2; 5527 event[2] = enabled; 5528 hci_emit_event(event, sizeof(event), 1); 5529 } 5530 5531 // query if remote side supports eSCO 5532 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5533 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5534 if (!connection) return 0; 5535 return (connection->remote_supported_features[0] & 1) != 0; 5536 } 5537 5538 static bool hci_ssp_supported(hci_connection_t * connection){ 5539 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5540 return (connection->bonding_flags & mask) == mask; 5541 } 5542 5543 // query if remote side supports SSP 5544 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5545 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5546 if (!connection) return 0; 5547 return hci_ssp_supported(connection) ? 1 : 0; 5548 } 5549 5550 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5551 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5552 } 5553 5554 // GAP API 5555 /** 5556 * @bbrief enable/disable bonding. default is enabled 5557 * @praram enabled 5558 */ 5559 void gap_set_bondable_mode(int enable){ 5560 hci_stack->bondable = enable ? 1 : 0; 5561 } 5562 /** 5563 * @brief Get bondable mode. 5564 * @return 1 if bondable 5565 */ 5566 int gap_get_bondable_mode(void){ 5567 return hci_stack->bondable; 5568 } 5569 5570 /** 5571 * @brief map link keys to security levels 5572 */ 5573 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5574 switch (link_key_type){ 5575 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5576 return LEVEL_4; 5577 case COMBINATION_KEY: 5578 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5579 return LEVEL_3; 5580 default: 5581 return LEVEL_2; 5582 } 5583 } 5584 5585 /** 5586 * @brief map link keys to secure connection yes/no 5587 */ 5588 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5589 switch (link_key_type){ 5590 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5591 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5592 return 1; 5593 default: 5594 return 0; 5595 } 5596 } 5597 5598 /** 5599 * @brief map link keys to authenticated 5600 */ 5601 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5602 switch (link_key_type){ 5603 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5604 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5605 return 1; 5606 default: 5607 return 0; 5608 } 5609 } 5610 5611 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5612 log_info("gap_mitm_protection_required_for_security_level %u", level); 5613 return level > LEVEL_2; 5614 } 5615 5616 /** 5617 * @brief get current security level 5618 */ 5619 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5620 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5621 if (!connection) return LEVEL_0; 5622 return gap_security_level_for_connection(connection); 5623 } 5624 5625 /** 5626 * @brief request connection to device to 5627 * @result GAP_AUTHENTICATION_RESULT 5628 */ 5629 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5630 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5631 if (!connection){ 5632 hci_emit_security_level(con_handle, LEVEL_0); 5633 return; 5634 } 5635 5636 btstack_assert(hci_is_le_connection(connection) == false); 5637 5638 // 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) 5639 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5640 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5641 requested_level = LEVEL_4; 5642 } 5643 5644 gap_security_level_t current_level = gap_security_level(con_handle); 5645 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5646 requested_level, connection->requested_security_level, current_level); 5647 5648 // authentication active if authentication request was sent or planned level > 0 5649 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5650 if (authentication_active){ 5651 // authentication already active 5652 if (connection->requested_security_level < requested_level){ 5653 // increase requested level as new level is higher 5654 // TODO: handle re-authentication when done 5655 connection->requested_security_level = requested_level; 5656 } 5657 } else { 5658 // no request active, notify if security sufficient 5659 if (requested_level <= current_level){ 5660 hci_emit_security_level(con_handle, current_level); 5661 return; 5662 } 5663 5664 // store request 5665 connection->requested_security_level = requested_level; 5666 5667 // start to authenticate connection 5668 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5669 hci_run(); 5670 } 5671 } 5672 5673 /** 5674 * @brief start dedicated bonding with device. disconnect after bonding 5675 * @param device 5676 * @param request MITM protection 5677 * @result GAP_DEDICATED_BONDING_COMPLETE 5678 */ 5679 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5680 5681 // create connection state machine 5682 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5683 5684 if (!connection){ 5685 return BTSTACK_MEMORY_ALLOC_FAILED; 5686 } 5687 5688 // delete linkn key 5689 gap_drop_link_key_for_bd_addr(device); 5690 5691 // configure LEVEL_2/3, dedicated bonding 5692 connection->state = SEND_CREATE_CONNECTION; 5693 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5694 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5695 connection->bonding_flags = BONDING_DEDICATED; 5696 5697 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5698 5699 // handle: connnection failure (connection complete != ok) 5700 // handle: authentication failure 5701 // handle: disconnect on done 5702 5703 hci_run(); 5704 5705 return 0; 5706 } 5707 #endif 5708 5709 void gap_set_local_name(const char * local_name){ 5710 hci_stack->local_name = local_name; 5711 } 5712 5713 5714 #ifdef ENABLE_BLE 5715 5716 #ifdef ENABLE_LE_CENTRAL 5717 void gap_start_scan(void){ 5718 hci_stack->le_scanning_enabled = true; 5719 hci_run(); 5720 } 5721 5722 void gap_stop_scan(void){ 5723 hci_stack->le_scanning_enabled = false; 5724 hci_run(); 5725 } 5726 5727 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5728 hci_stack->le_scan_type = scan_type; 5729 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5730 hci_stack->le_scan_interval = scan_interval; 5731 hci_stack->le_scan_window = scan_window; 5732 hci_stack->le_scanning_param_update = true; 5733 hci_run(); 5734 } 5735 5736 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5737 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5738 } 5739 5740 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5741 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5742 if (!conn){ 5743 // disallow if le connection is already outgoing 5744 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5745 log_error("le connection already active"); 5746 return ERROR_CODE_COMMAND_DISALLOWED; 5747 } 5748 5749 log_info("gap_connect: no connection exists yet, creating context"); 5750 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5751 if (!conn){ 5752 // notify client that alloc failed 5753 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5754 log_info("gap_connect: failed to alloc hci_connection_t"); 5755 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5756 } 5757 5758 // set le connecting state 5759 if (hci_is_le_connection_type(addr_type)){ 5760 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5761 } 5762 5763 conn->state = SEND_CREATE_CONNECTION; 5764 log_info("gap_connect: send create connection next"); 5765 hci_run(); 5766 return ERROR_CODE_SUCCESS; 5767 } 5768 5769 if (!hci_is_le_connection(conn) || 5770 (conn->state == SEND_CREATE_CONNECTION) || 5771 (conn->state == SENT_CREATE_CONNECTION)) { 5772 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5773 log_error("gap_connect: classic connection or connect is already being created"); 5774 return GATT_CLIENT_IN_WRONG_STATE; 5775 } 5776 5777 // check if connection was just disconnected 5778 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5779 log_info("gap_connect: send create connection (again)"); 5780 conn->state = SEND_CREATE_CONNECTION; 5781 hci_run(); 5782 return ERROR_CODE_SUCCESS; 5783 } 5784 5785 log_info("gap_connect: context exists with state %u", conn->state); 5786 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5787 hci_run(); 5788 return ERROR_CODE_SUCCESS; 5789 } 5790 5791 // @assumption: only a single outgoing LE Connection exists 5792 static hci_connection_t * gap_get_outgoing_connection(void){ 5793 btstack_linked_item_t *it; 5794 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5795 hci_connection_t * conn = (hci_connection_t *) it; 5796 if (!hci_is_le_connection(conn)) continue; 5797 switch (conn->state){ 5798 case SEND_CREATE_CONNECTION: 5799 case SENT_CREATE_CONNECTION: 5800 case SENT_CANCEL_CONNECTION: 5801 return conn; 5802 default: 5803 break; 5804 }; 5805 } 5806 return NULL; 5807 } 5808 5809 uint8_t gap_connect_cancel(void){ 5810 hci_connection_t * conn = gap_get_outgoing_connection(); 5811 if (!conn) return 0; 5812 switch (conn->state){ 5813 case SEND_CREATE_CONNECTION: 5814 // skip sending create connection and emit event instead 5815 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5816 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5817 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5818 btstack_memory_hci_connection_free( conn ); 5819 break; 5820 case SENT_CREATE_CONNECTION: 5821 // request to send cancel connection 5822 conn->state = SEND_CANCEL_CONNECTION; 5823 hci_run(); 5824 break; 5825 default: 5826 break; 5827 } 5828 return 0; 5829 } 5830 #endif 5831 5832 #ifdef ENABLE_LE_CENTRAL 5833 /** 5834 * @brief Set connection parameters for outgoing connections 5835 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5836 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5837 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5838 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5839 * @param conn_latency, default: 4 5840 * @param supervision_timeout (unit: 10ms), default: 720 ms 5841 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5842 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5843 */ 5844 5845 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5846 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5847 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5848 hci_stack->le_connection_scan_interval = conn_scan_interval; 5849 hci_stack->le_connection_scan_window = conn_scan_window; 5850 hci_stack->le_connection_interval_min = conn_interval_min; 5851 hci_stack->le_connection_interval_max = conn_interval_max; 5852 hci_stack->le_connection_latency = conn_latency; 5853 hci_stack->le_supervision_timeout = supervision_timeout; 5854 hci_stack->le_minimum_ce_length = min_ce_length; 5855 hci_stack->le_maximum_ce_length = max_ce_length; 5856 } 5857 #endif 5858 5859 /** 5860 * @brief Updates the connection parameters for a given LE connection 5861 * @param handle 5862 * @param conn_interval_min (unit: 1.25ms) 5863 * @param conn_interval_max (unit: 1.25ms) 5864 * @param conn_latency 5865 * @param supervision_timeout (unit: 10ms) 5866 * @returns 0 if ok 5867 */ 5868 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5869 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5870 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5871 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5872 connection->le_conn_interval_min = conn_interval_min; 5873 connection->le_conn_interval_max = conn_interval_max; 5874 connection->le_conn_latency = conn_latency; 5875 connection->le_supervision_timeout = supervision_timeout; 5876 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5877 hci_run(); 5878 return 0; 5879 } 5880 5881 /** 5882 * @brief Request an update of the connection parameter for a given LE connection 5883 * @param handle 5884 * @param conn_interval_min (unit: 1.25ms) 5885 * @param conn_interval_max (unit: 1.25ms) 5886 * @param conn_latency 5887 * @param supervision_timeout (unit: 10ms) 5888 * @returns 0 if ok 5889 */ 5890 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5891 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5892 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5893 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5894 connection->le_conn_interval_min = conn_interval_min; 5895 connection->le_conn_interval_max = conn_interval_max; 5896 connection->le_conn_latency = conn_latency; 5897 connection->le_supervision_timeout = supervision_timeout; 5898 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5899 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5900 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5901 return 0; 5902 } 5903 5904 #ifdef ENABLE_LE_PERIPHERAL 5905 5906 /** 5907 * @brief Set Advertisement Data 5908 * @param advertising_data_length 5909 * @param advertising_data (max 31 octets) 5910 * @note data is not copied, pointer has to stay valid 5911 */ 5912 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5913 hci_stack->le_advertisements_data_len = advertising_data_length; 5914 hci_stack->le_advertisements_data = advertising_data; 5915 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5916 hci_run(); 5917 } 5918 5919 /** 5920 * @brief Set Scan Response Data 5921 * @param advertising_data_length 5922 * @param advertising_data (max 31 octets) 5923 * @note data is not copied, pointer has to stay valid 5924 */ 5925 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5926 hci_stack->le_scan_response_data_len = scan_response_data_length; 5927 hci_stack->le_scan_response_data = scan_response_data; 5928 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5929 hci_run(); 5930 } 5931 5932 /** 5933 * @brief Set Advertisement Parameters 5934 * @param adv_int_min 5935 * @param adv_int_max 5936 * @param adv_type 5937 * @param direct_address_type 5938 * @param direct_address 5939 * @param channel_map 5940 * @param filter_policy 5941 * 5942 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5943 */ 5944 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5945 uint8_t direct_address_typ, bd_addr_t direct_address, 5946 uint8_t channel_map, uint8_t filter_policy) { 5947 5948 hci_stack->le_advertisements_interval_min = adv_int_min; 5949 hci_stack->le_advertisements_interval_max = adv_int_max; 5950 hci_stack->le_advertisements_type = adv_type; 5951 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5952 hci_stack->le_advertisements_channel_map = channel_map; 5953 hci_stack->le_advertisements_filter_policy = filter_policy; 5954 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5955 6); 5956 5957 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5958 hci_run(); 5959 } 5960 5961 /** 5962 * @brief Enable/Disable Advertisements 5963 * @param enabled 5964 */ 5965 void gap_advertisements_enable(int enabled){ 5966 hci_stack->le_advertisements_enabled = enabled != 0; 5967 hci_update_advertisements_enabled_for_current_roles(); 5968 hci_run(); 5969 } 5970 5971 #endif 5972 5973 void hci_le_set_own_address_type(uint8_t own_address_type){ 5974 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5975 if (own_address_type == hci_stack->le_own_addr_type) return; 5976 hci_stack->le_own_addr_type = own_address_type; 5977 5978 #ifdef ENABLE_LE_PERIPHERAL 5979 // update advertisement parameters, too 5980 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5981 hci_run(); 5982 #endif 5983 #ifdef ENABLE_LE_CENTRAL 5984 // note: we don't update scan parameters or modify ongoing connection attempts 5985 #endif 5986 } 5987 5988 #endif 5989 5990 uint8_t gap_disconnect(hci_con_handle_t handle){ 5991 hci_connection_t * conn = hci_connection_for_handle(handle); 5992 if (!conn){ 5993 hci_emit_disconnection_complete(handle, 0); 5994 return 0; 5995 } 5996 // ignore if already disconnected 5997 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5998 return 0; 5999 } 6000 conn->state = SEND_DISCONNECT; 6001 hci_run(); 6002 return 0; 6003 } 6004 6005 int gap_read_rssi(hci_con_handle_t con_handle){ 6006 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6007 if (hci_connection == NULL) return 0; 6008 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6009 hci_run(); 6010 return 1; 6011 } 6012 6013 /** 6014 * @brief Get connection type 6015 * @param con_handle 6016 * @result connection_type 6017 */ 6018 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6019 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6020 if (!conn) return GAP_CONNECTION_INVALID; 6021 switch (conn->address_type){ 6022 case BD_ADDR_TYPE_LE_PUBLIC: 6023 case BD_ADDR_TYPE_LE_RANDOM: 6024 return GAP_CONNECTION_LE; 6025 case BD_ADDR_TYPE_SCO: 6026 return GAP_CONNECTION_SCO; 6027 case BD_ADDR_TYPE_ACL: 6028 return GAP_CONNECTION_ACL; 6029 default: 6030 return GAP_CONNECTION_INVALID; 6031 } 6032 } 6033 6034 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6035 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6036 if (!conn) return HCI_ROLE_INVALID; 6037 return (hci_role_t) conn->role; 6038 } 6039 6040 6041 #ifdef ENABLE_CLASSIC 6042 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6043 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6044 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6045 conn->request_role = role; 6046 hci_run(); 6047 return ERROR_CODE_SUCCESS; 6048 } 6049 #endif 6050 6051 #ifdef ENABLE_BLE 6052 6053 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){ 6054 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6055 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6056 6057 conn->le_phy_update_all_phys = all_phys; 6058 conn->le_phy_update_tx_phys = tx_phys; 6059 conn->le_phy_update_rx_phys = rx_phys; 6060 conn->le_phy_update_phy_options = phy_options; 6061 6062 hci_run(); 6063 6064 return 0; 6065 } 6066 6067 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6068 // check if already in list 6069 btstack_linked_list_iterator_t it; 6070 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6071 while (btstack_linked_list_iterator_has_next(&it)) { 6072 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6073 if (entry->address_type != address_type) { 6074 continue; 6075 } 6076 if (memcmp(entry->address, address, 6) != 0) { 6077 continue; 6078 } 6079 // disallow if already scheduled to add 6080 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6081 return ERROR_CODE_COMMAND_DISALLOWED; 6082 } 6083 // still on controller, but scheduled to remove -> re-add 6084 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6085 return ERROR_CODE_SUCCESS; 6086 } 6087 // alloc and add to list 6088 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6089 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6090 entry->address_type = address_type; 6091 (void)memcpy(entry->address, address, 6); 6092 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6093 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6094 return ERROR_CODE_SUCCESS; 6095 } 6096 6097 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6098 btstack_linked_list_iterator_t it; 6099 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6100 while (btstack_linked_list_iterator_has_next(&it)){ 6101 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6102 if (entry->address_type != address_type) { 6103 continue; 6104 } 6105 if (memcmp(entry->address, address, 6) != 0) { 6106 continue; 6107 } 6108 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6109 // remove from controller if already present 6110 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6111 } else { 6112 // directly remove entry from whitelist 6113 btstack_linked_list_iterator_remove(&it); 6114 btstack_memory_whitelist_entry_free(entry); 6115 } 6116 return ERROR_CODE_SUCCESS; 6117 } 6118 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6119 } 6120 6121 static void hci_whitelist_clear(void){ 6122 btstack_linked_list_iterator_t it; 6123 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6124 while (btstack_linked_list_iterator_has_next(&it)){ 6125 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6126 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6127 // remove from controller if already present 6128 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6129 continue; 6130 } 6131 // directly remove entry from whitelist 6132 btstack_linked_list_iterator_remove(&it); 6133 btstack_memory_whitelist_entry_free(entry); 6134 } 6135 } 6136 6137 /** 6138 * @brief Clear Whitelist 6139 * @returns 0 if ok 6140 */ 6141 uint8_t gap_whitelist_clear(void){ 6142 hci_whitelist_clear(); 6143 hci_run(); 6144 return ERROR_CODE_SUCCESS; 6145 } 6146 6147 /** 6148 * @brief Add Device to Whitelist 6149 * @param address_typ 6150 * @param address 6151 * @returns 0 if ok 6152 */ 6153 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6154 uint8_t status = hci_whitelist_add(address_type, address); 6155 if (status){ 6156 return status; 6157 } 6158 hci_run(); 6159 return ERROR_CODE_SUCCESS; 6160 } 6161 6162 /** 6163 * @brief Remove Device from Whitelist 6164 * @param address_typ 6165 * @param address 6166 * @returns 0 if ok 6167 */ 6168 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6169 uint8_t status = hci_whitelist_remove(address_type, address); 6170 if (status){ 6171 return status; 6172 } 6173 hci_run(); 6174 return ERROR_CODE_SUCCESS; 6175 } 6176 6177 #ifdef ENABLE_LE_CENTRAL 6178 /** 6179 * @brief Connect with Whitelist 6180 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6181 * @returns - if ok 6182 */ 6183 uint8_t gap_connect_with_whitelist(void){ 6184 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6185 return ERROR_CODE_COMMAND_DISALLOWED; 6186 } 6187 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6188 hci_run(); 6189 return ERROR_CODE_SUCCESS; 6190 } 6191 6192 /** 6193 * @brief Auto Connection Establishment - Start Connecting to device 6194 * @param address_typ 6195 * @param address 6196 * @returns 0 if ok 6197 */ 6198 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6199 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6200 return ERROR_CODE_COMMAND_DISALLOWED; 6201 } 6202 6203 uint8_t status = hci_whitelist_add(address_type, address); 6204 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6205 return status; 6206 } 6207 6208 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6209 6210 hci_run(); 6211 return ERROR_CODE_SUCCESS; 6212 } 6213 6214 /** 6215 * @brief Auto Connection Establishment - Stop Connecting to device 6216 * @param address_typ 6217 * @param address 6218 * @returns 0 if ok 6219 */ 6220 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6221 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6222 return ERROR_CODE_COMMAND_DISALLOWED; 6223 } 6224 6225 hci_whitelist_remove(address_type, address); 6226 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6227 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6228 } 6229 hci_run(); 6230 return 0; 6231 } 6232 6233 /** 6234 * @brief Auto Connection Establishment - Stop everything 6235 * @note Convenience function to stop all active auto connection attempts 6236 */ 6237 uint8_t gap_auto_connection_stop_all(void){ 6238 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6239 return ERROR_CODE_COMMAND_DISALLOWED; 6240 } 6241 hci_whitelist_clear(); 6242 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6243 hci_run(); 6244 return ERROR_CODE_SUCCESS; 6245 } 6246 6247 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6248 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6249 if (!conn) return 0; 6250 return conn->le_connection_interval; 6251 } 6252 #endif 6253 #endif 6254 6255 #ifdef ENABLE_CLASSIC 6256 /** 6257 * @brief Set Extended Inquiry Response data 6258 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6259 * @note has to be done before stack starts up 6260 */ 6261 void gap_set_extended_inquiry_response(const uint8_t * data){ 6262 hci_stack->eir_data = data; 6263 } 6264 6265 /** 6266 * @brief Start GAP Classic Inquiry 6267 * @param duration in 1.28s units 6268 * @return 0 if ok 6269 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6270 */ 6271 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6272 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6273 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6274 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6275 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6276 } 6277 hci_stack->inquiry_state = duration_in_1280ms_units; 6278 hci_run(); 6279 return 0; 6280 } 6281 6282 /** 6283 * @brief Stop GAP Classic Inquiry 6284 * @returns 0 if ok 6285 */ 6286 int gap_inquiry_stop(void){ 6287 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6288 // emit inquiry complete event, before it even started 6289 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6290 hci_emit_event(event, sizeof(event), 1); 6291 return 0; 6292 } 6293 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6294 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6295 hci_run(); 6296 return 0; 6297 } 6298 6299 void gap_inquiry_set_lap(uint32_t lap){ 6300 hci_stack->inquiry_lap = lap; 6301 } 6302 6303 6304 /** 6305 * @brief Remote Name Request 6306 * @param addr 6307 * @param page_scan_repetition_mode 6308 * @param clock_offset only used when bit 15 is set 6309 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6310 */ 6311 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6312 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6313 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6314 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6315 hci_stack->remote_name_clock_offset = clock_offset; 6316 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6317 hci_run(); 6318 return 0; 6319 } 6320 6321 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6322 hci_stack->gap_pairing_state = state; 6323 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6324 hci_run(); 6325 return 0; 6326 } 6327 6328 /** 6329 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6330 * @param addr 6331 * @param pin_data 6332 * @param pin_len 6333 * @return 0 if ok 6334 */ 6335 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6336 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6337 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6338 hci_stack->gap_pairing_pin_len = pin_len; 6339 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6340 } 6341 6342 /** 6343 * @brief Legacy Pairing Pin Code Response 6344 * @param addr 6345 * @param pin 6346 * @return 0 if ok 6347 */ 6348 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6349 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6350 } 6351 6352 /** 6353 * @brief Abort Legacy Pairing 6354 * @param addr 6355 * @param pin 6356 * @return 0 if ok 6357 */ 6358 int gap_pin_code_negative(bd_addr_t addr){ 6359 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6360 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6361 } 6362 6363 /** 6364 * @brief SSP Passkey Response 6365 * @param addr 6366 * @param passkey 6367 * @return 0 if ok 6368 */ 6369 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6370 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6371 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6372 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6373 } 6374 6375 /** 6376 * @brief Abort SSP Passkey Entry/Pairing 6377 * @param addr 6378 * @param pin 6379 * @return 0 if ok 6380 */ 6381 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6382 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6383 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6384 } 6385 6386 /** 6387 * @brief Accept SSP Numeric Comparison 6388 * @param addr 6389 * @param passkey 6390 * @return 0 if ok 6391 */ 6392 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6393 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6394 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6395 } 6396 6397 /** 6398 * @brief Abort SSP Numeric Comparison/Pairing 6399 * @param addr 6400 * @param pin 6401 * @return 0 if ok 6402 */ 6403 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6404 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6405 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6406 } 6407 6408 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6409 6410 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6411 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6412 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6413 connectionSetAuthenticationFlags(conn, flag); 6414 hci_run(); 6415 return ERROR_CODE_SUCCESS; 6416 } 6417 6418 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6419 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6420 } 6421 6422 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6423 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6424 } 6425 #endif 6426 6427 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6428 /** 6429 * @brief Report Remote OOB Data 6430 * @param bd_addr 6431 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6432 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6433 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6434 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6435 */ 6436 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){ 6437 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6438 if (connection == NULL) { 6439 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6440 } 6441 connection->classic_oob_c_192 = c_192; 6442 connection->classic_oob_r_192 = r_192; 6443 6444 // ignore P-256 if not supported by us 6445 if (hci_stack->secure_connections_active){ 6446 connection->classic_oob_c_256 = c_256; 6447 connection->classic_oob_r_256 = r_256; 6448 } 6449 6450 return ERROR_CODE_SUCCESS; 6451 } 6452 /** 6453 * @brief Generate new OOB data 6454 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6455 */ 6456 void gap_ssp_generate_oob_data(void){ 6457 hci_stack->classic_read_local_oob_data = true; 6458 hci_run(); 6459 } 6460 6461 #endif 6462 6463 /** 6464 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6465 * @param inquiry_mode see bluetooth_defines.h 6466 */ 6467 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6468 hci_stack->inquiry_mode = inquiry_mode; 6469 } 6470 6471 /** 6472 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6473 */ 6474 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6475 hci_stack->sco_voice_setting = voice_setting; 6476 } 6477 6478 /** 6479 * @brief Get SCO Voice Setting 6480 * @return current voice setting 6481 */ 6482 uint16_t hci_get_sco_voice_setting(void){ 6483 return hci_stack->sco_voice_setting; 6484 } 6485 6486 static int hci_have_usb_transport(void){ 6487 if (!hci_stack->hci_transport) return 0; 6488 const char * transport_name = hci_stack->hci_transport->name; 6489 if (!transport_name) return 0; 6490 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6491 } 6492 6493 /** @brief Get SCO packet length for current SCO Voice setting 6494 * @note Using SCO packets of the exact length is required for USB transfer 6495 * @return Length of SCO packets in bytes (not audio frames) 6496 */ 6497 int hci_get_sco_packet_length(void){ 6498 int sco_packet_length = 0; 6499 6500 #ifdef ENABLE_SCO_OVER_HCI 6501 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6502 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6503 6504 if (hci_have_usb_transport()){ 6505 // see Core Spec for H2 USB Transfer. 6506 // 3 byte SCO header + 24 bytes per connection 6507 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6508 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6509 } else { 6510 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6511 sco_packet_length = 3 + 60 * multiplier; 6512 // assert that it still fits inside an SCO buffer 6513 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6514 sco_packet_length = 3 + 60; 6515 } 6516 } 6517 #endif 6518 6519 #ifdef HAVE_SCO_TRANSPORT 6520 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6521 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6522 sco_packet_length = 3 + 60 * multiplier; 6523 #endif 6524 return sco_packet_length; 6525 } 6526 6527 /** 6528 * @brief Sets the master/slave policy 6529 * @param policy (0: attempt to become master, 1: let connecting device decide) 6530 */ 6531 void hci_set_master_slave_policy(uint8_t policy){ 6532 hci_stack->master_slave_policy = policy; 6533 } 6534 6535 #endif 6536 6537 HCI_STATE hci_get_state(void){ 6538 return hci_stack->state; 6539 } 6540 6541 #ifdef ENABLE_CLASSIC 6542 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6543 hci_stack->gap_classic_accept_callback = accept_callback; 6544 } 6545 #endif 6546 6547 /** 6548 * @brief Set callback for Bluetooth Hardware Error 6549 */ 6550 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6551 hci_stack->hardware_error_callback = fn; 6552 } 6553 6554 void hci_disconnect_all(void){ 6555 btstack_linked_list_iterator_t it; 6556 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6557 while (btstack_linked_list_iterator_has_next(&it)){ 6558 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6559 if (con->state == SENT_DISCONNECT) continue; 6560 con->state = SEND_DISCONNECT; 6561 } 6562 hci_run(); 6563 } 6564 6565 uint16_t hci_get_manufacturer(void){ 6566 return hci_stack->manufacturer; 6567 } 6568 6569 #ifdef ENABLE_BLE 6570 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6571 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6572 if (!hci_con) return NULL; 6573 return &hci_con->sm_connection; 6574 } 6575 6576 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6577 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6578 #endif 6579 6580 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6581 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6582 if (hci_connection == NULL) return 0; 6583 if (hci_is_le_connection(hci_connection)){ 6584 #ifdef ENABLE_BLE 6585 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6586 if (sm_conn->sm_connection_encrypted) { 6587 return sm_conn->sm_actual_encryption_key_size; 6588 } 6589 #endif 6590 } else { 6591 #ifdef ENABLE_CLASSIC 6592 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6593 return hci_connection->encryption_key_size; 6594 } 6595 #endif 6596 } 6597 return 0; 6598 } 6599 6600 int gap_authenticated(hci_con_handle_t con_handle){ 6601 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6602 if (hci_connection == NULL) return 0; 6603 6604 switch (hci_connection->address_type){ 6605 #ifdef ENABLE_BLE 6606 case BD_ADDR_TYPE_LE_PUBLIC: 6607 case BD_ADDR_TYPE_LE_RANDOM: 6608 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6609 return hci_connection->sm_connection.sm_connection_authenticated; 6610 #endif 6611 #ifdef ENABLE_CLASSIC 6612 case BD_ADDR_TYPE_SCO: 6613 case BD_ADDR_TYPE_ACL: 6614 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6615 #endif 6616 default: 6617 return 0; 6618 } 6619 } 6620 6621 int gap_secure_connection(hci_con_handle_t con_handle){ 6622 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6623 if (hci_connection == NULL) return 0; 6624 6625 switch (hci_connection->address_type){ 6626 #ifdef ENABLE_BLE 6627 case BD_ADDR_TYPE_LE_PUBLIC: 6628 case BD_ADDR_TYPE_LE_RANDOM: 6629 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6630 return hci_connection->sm_connection.sm_connection_sc; 6631 #endif 6632 #ifdef ENABLE_CLASSIC 6633 case BD_ADDR_TYPE_SCO: 6634 case BD_ADDR_TYPE_ACL: 6635 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6636 #endif 6637 default: 6638 return 0; 6639 } 6640 } 6641 6642 bool gap_bonded(hci_con_handle_t con_handle){ 6643 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6644 if (hci_connection == NULL) return 0; 6645 6646 #ifdef ENABLE_CLASSIC 6647 link_key_t link_key; 6648 link_key_type_t link_key_type; 6649 #endif 6650 switch (hci_connection->address_type){ 6651 #ifdef ENABLE_BLE 6652 case BD_ADDR_TYPE_LE_PUBLIC: 6653 case BD_ADDR_TYPE_LE_RANDOM: 6654 return hci_connection->sm_connection.sm_le_db_index >= 0; 6655 #endif 6656 #ifdef ENABLE_CLASSIC 6657 case BD_ADDR_TYPE_SCO: 6658 case BD_ADDR_TYPE_ACL: 6659 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6660 #endif 6661 default: 6662 return false; 6663 } 6664 } 6665 6666 #ifdef ENABLE_BLE 6667 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6668 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6669 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6670 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6671 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6672 return sm_conn->sm_connection_authorization_state; 6673 } 6674 #endif 6675 6676 #ifdef ENABLE_CLASSIC 6677 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){ 6678 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6679 if (!conn) return GAP_CONNECTION_INVALID; 6680 conn->sniff_min_interval = sniff_min_interval; 6681 conn->sniff_max_interval = sniff_max_interval; 6682 conn->sniff_attempt = sniff_attempt; 6683 conn->sniff_timeout = sniff_timeout; 6684 hci_run(); 6685 return 0; 6686 } 6687 6688 /** 6689 * @brief Exit Sniff mode 6690 * @param con_handle 6691 @ @return 0 if ok 6692 */ 6693 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6694 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6695 if (!conn) return GAP_CONNECTION_INVALID; 6696 conn->sniff_min_interval = 0xffff; 6697 hci_run(); 6698 return 0; 6699 } 6700 6701 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){ 6702 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6703 if (!conn) return GAP_CONNECTION_INVALID; 6704 conn->sniff_subrating_max_latency = max_latency; 6705 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6706 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6707 hci_run(); 6708 return ERROR_CODE_SUCCESS; 6709 } 6710 6711 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){ 6712 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6713 if (!conn) return GAP_CONNECTION_INVALID; 6714 conn->qos_service_type = service_type; 6715 conn->qos_token_rate = token_rate; 6716 conn->qos_peak_bandwidth = peak_bandwidth; 6717 conn->qos_latency = latency; 6718 conn->qos_delay_variation = delay_variation; 6719 hci_run(); 6720 return ERROR_CODE_SUCCESS; 6721 } 6722 6723 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6724 hci_stack->new_page_scan_interval = page_scan_interval; 6725 hci_stack->new_page_scan_window = page_scan_window; 6726 hci_run(); 6727 } 6728 6729 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6730 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6731 hci_run(); 6732 } 6733 6734 #endif 6735 6736 void hci_halting_defer(void){ 6737 if (hci_stack->state != HCI_STATE_HALTING) return; 6738 switch (hci_stack->substate){ 6739 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6740 case HCI_HALTING_CLOSE: 6741 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6742 break; 6743 default: 6744 break; 6745 } 6746 } 6747 6748 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6749 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6750 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6751 if (le_device_db_index >= le_device_db_max_count()) return; 6752 uint8_t offset = le_device_db_index >> 3; 6753 uint8_t mask = 1 << (le_device_db_index & 7); 6754 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6755 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6756 // note: go back to remove entries, otherwise, a remove + add will skip the add 6757 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6758 } 6759 } 6760 6761 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6762 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6763 if (le_device_db_index >= le_device_db_max_count()) return; 6764 uint8_t offset = le_device_db_index >> 3; 6765 uint8_t mask = 1 << (le_device_db_index & 7); 6766 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6767 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6768 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6769 } 6770 } 6771 6772 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6773 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6774 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6775 } 6776 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6777 // restart le resolving list update 6778 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6779 } 6780 return ERROR_CODE_SUCCESS; 6781 } 6782 #endif 6783 6784 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6785 void hci_setup_test_connections_fuzz(void){ 6786 hci_connection_t * conn; 6787 6788 // default address: 66:55:44:33:00:01 6789 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6790 6791 // setup Controller info 6792 hci_stack->num_cmd_packets = 255; 6793 hci_stack->acl_packets_total_num = 255; 6794 6795 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6796 addr[5] = 0x01; 6797 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6798 conn->con_handle = addr[5]; 6799 conn->role = HCI_ROLE_SLAVE; 6800 conn->state = RECEIVED_CONNECTION_REQUEST; 6801 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6802 6803 // setup incoming Classic SCO connection with con handle 0x0002 6804 addr[5] = 0x02; 6805 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6806 conn->con_handle = addr[5]; 6807 conn->role = HCI_ROLE_SLAVE; 6808 conn->state = RECEIVED_CONNECTION_REQUEST; 6809 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6810 6811 // setup ready Classic ACL connection with con handle 0x0003 6812 addr[5] = 0x03; 6813 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6814 conn->con_handle = addr[5]; 6815 conn->role = HCI_ROLE_SLAVE; 6816 conn->state = OPEN; 6817 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6818 6819 // setup ready Classic SCO connection with con handle 0x0004 6820 addr[5] = 0x04; 6821 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6822 conn->con_handle = addr[5]; 6823 conn->role = HCI_ROLE_SLAVE; 6824 conn->state = OPEN; 6825 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6826 6827 // setup ready LE ACL connection with con handle 0x005 and public address 6828 addr[5] = 0x05; 6829 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6830 conn->con_handle = addr[5]; 6831 conn->role = HCI_ROLE_SLAVE; 6832 conn->state = OPEN; 6833 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6834 conn->sm_connection.sm_connection_encrypted = 1; 6835 } 6836 6837 void hci_free_connections_fuzz(void){ 6838 btstack_linked_list_iterator_t it; 6839 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6840 while (btstack_linked_list_iterator_has_next(&it)){ 6841 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6842 btstack_linked_list_iterator_remove(&it); 6843 btstack_memory_hci_connection_free(con); 6844 } 6845 } 6846 void hci_simulate_working_fuzz(void){ 6847 hci_init_done(); 6848 hci_stack->num_cmd_packets = 255; 6849 } 6850 #endif 6851