1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 // reset connection state on create and on reconnect 198 // don't overwrite addr, con handle, role 199 static void hci_connection_init(hci_connection_t * conn){ 200 conn->authentication_flags = AUTH_FLAG_NONE; 201 conn->bonding_flags = 0; 202 conn->requested_security_level = LEVEL_0; 203 #ifdef ENABLE_CLASSIC 204 conn->request_role = HCI_ROLE_INVALID; 205 conn->sniff_subrating_max_latency = 0xffff; 206 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 207 conn->link_key_type = INVALID_LINK_KEY; 208 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 209 btstack_run_loop_set_timer_context(&conn->timeout, conn); 210 hci_connection_timestamp(conn); 211 #endif 212 conn->acl_recombination_length = 0; 213 conn->acl_recombination_pos = 0; 214 conn->num_packets_sent = 0; 215 216 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 217 #ifdef ENABLE_BLE 218 conn->le_phy_update_all_phys = 0xff; 219 #endif 220 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 221 conn->le_max_tx_octets = 27; 222 #endif 223 } 224 225 /** 226 * create connection for given address 227 * 228 * @return connection OR NULL, if no memory left 229 */ 230 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 231 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 232 233 hci_connection_t * conn = btstack_memory_hci_connection_get(); 234 if (!conn) return NULL; 235 hci_connection_init(conn); 236 237 bd_addr_copy(conn->address, addr); 238 conn->address_type = addr_type; 239 conn->con_handle = HCI_CON_HANDLE_INVALID; 240 conn->role = HCI_ROLE_INVALID; 241 242 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 243 244 return conn; 245 } 246 247 248 /** 249 * get le connection parameter range 250 * 251 * @return le connection parameter range struct 252 */ 253 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 254 *range = hci_stack->le_connection_parameter_range; 255 } 256 257 /** 258 * set le connection parameter range 259 * 260 */ 261 262 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 263 hci_stack->le_connection_parameter_range = *range; 264 } 265 266 /** 267 * @brief Test if connection parameters are inside in existing rage 268 * @param conn_interval_min (unit: 1.25ms) 269 * @param conn_interval_max (unit: 1.25ms) 270 * @param conn_latency 271 * @param supervision_timeout (unit: 10ms) 272 * @returns 1 if included 273 */ 274 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 275 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 276 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 277 278 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 279 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 280 281 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 282 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 283 284 return 1; 285 } 286 287 /** 288 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 289 * @note: default: 1 290 * @param max_peripheral_connections 291 */ 292 #ifdef ENABLE_LE_PERIPHERAL 293 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 294 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 295 } 296 #endif 297 298 /** 299 * get hci connections iterator 300 * 301 * @return hci connections iterator 302 */ 303 304 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 305 btstack_linked_list_iterator_init(it, &hci_stack->connections); 306 } 307 308 /** 309 * get connection for a given handle 310 * 311 * @return connection OR NULL, if not found 312 */ 313 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 314 btstack_linked_list_iterator_t it; 315 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 316 while (btstack_linked_list_iterator_has_next(&it)){ 317 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 318 if ( item->con_handle == con_handle ) { 319 return item; 320 } 321 } 322 return NULL; 323 } 324 325 /** 326 * get connection for given address 327 * 328 * @return connection OR NULL, if not found 329 */ 330 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 331 btstack_linked_list_iterator_t it; 332 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 333 while (btstack_linked_list_iterator_has_next(&it)){ 334 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 335 if (connection->address_type != addr_type) continue; 336 if (memcmp(addr, connection->address, 6) != 0) continue; 337 return connection; 338 } 339 return NULL; 340 } 341 342 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 343 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 344 } 345 346 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 348 } 349 350 #ifdef ENABLE_CLASSIC 351 352 #ifdef ENABLE_SCO_OVER_HCI 353 static int hci_number_sco_connections(void){ 354 int connections = 0; 355 btstack_linked_list_iterator_t it; 356 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 357 while (btstack_linked_list_iterator_has_next(&it)){ 358 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 359 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 360 connections++; 361 } 362 return connections; 363 } 364 #endif 365 366 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 367 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 368 #ifdef HAVE_EMBEDDED_TICK 369 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 370 // connections might be timed out 371 hci_emit_l2cap_check_timeout(connection); 372 } 373 #else 374 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 375 // connections might be timed out 376 hci_emit_l2cap_check_timeout(connection); 377 } 378 #endif 379 } 380 381 static void hci_connection_timestamp(hci_connection_t *connection){ 382 #ifdef HAVE_EMBEDDED_TICK 383 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 384 #else 385 connection->timestamp = btstack_run_loop_get_time_ms(); 386 #endif 387 } 388 389 /** 390 * add authentication flags and reset timer 391 * @note: assumes classic connection 392 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 393 */ 394 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 395 bd_addr_t addr; 396 reverse_bd_addr(bd_addr, addr); 397 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 398 if (conn) { 399 connectionSetAuthenticationFlags(conn, flags); 400 hci_connection_timestamp(conn); 401 } 402 } 403 404 static bool hci_pairing_active(hci_connection_t * hci_connection){ 405 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 406 } 407 408 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 409 if (hci_pairing_active(hci_connection)) return; 410 if (ssp){ 411 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 412 } else { 413 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 414 } 415 // if we are initiator, we have sent an HCI Authenticate Request 416 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 417 418 // if we are responder, use minimal service security level as required level 419 if (!initiator){ 420 hci_connection->requested_security_level = (gap_security_level_t) btstack_max((uint32_t) hci_connection->requested_security_level, (uint32_t) hci_stack->gap_minimal_service_security_level); 421 } 422 423 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 424 425 uint8_t event[12]; 426 event[0] = GAP_EVENT_PAIRING_STARTED; 427 event[1] = 10; 428 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 429 reverse_bd_addr(hci_connection->address, &event[4]); 430 event[10] = (uint8_t) ssp; 431 event[11] = (uint8_t) initiator; 432 hci_emit_event(event, sizeof(event), 1); 433 } 434 435 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 436 hci_connection->requested_security_level = LEVEL_0; 437 if (!hci_pairing_active(hci_connection)) return; 438 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 439 log_info("pairing complete, status %02x", status); 440 441 uint8_t event[12]; 442 event[0] = GAP_EVENT_PAIRING_COMPLETE; 443 event[1] = 9; 444 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 445 reverse_bd_addr(hci_connection->address, &event[4]); 446 event[10] = status; 447 hci_emit_event(event, sizeof(event), 1); 448 } 449 450 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 451 hci_connection_t * conn = hci_connection_for_handle(handle); 452 if (!conn) return false; 453 return hci_pairing_active(conn); 454 } 455 456 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 457 if (!hci_stack->link_key_db) return; 458 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 459 hci_stack->link_key_db->delete_link_key(addr); 460 } 461 462 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 463 if (!hci_stack->link_key_db) return; 464 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 465 hci_stack->link_key_db->put_link_key(addr, link_key, type); 466 } 467 468 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 469 if (!hci_stack->link_key_db) return false; 470 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 471 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 472 return result; 473 } 474 475 void gap_delete_all_link_keys(void){ 476 bd_addr_t addr; 477 link_key_t link_key; 478 link_key_type_t type; 479 btstack_link_key_iterator_t it; 480 int ok = gap_link_key_iterator_init(&it); 481 if (!ok) { 482 log_error("could not initialize iterator"); 483 return; 484 } 485 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 486 gap_drop_link_key_for_bd_addr(addr); 487 } 488 gap_link_key_iterator_done(&it); 489 } 490 491 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 492 if (!hci_stack->link_key_db) return 0; 493 if (!hci_stack->link_key_db->iterator_init) return 0; 494 return hci_stack->link_key_db->iterator_init(it); 495 } 496 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 497 if (!hci_stack->link_key_db) return 0; 498 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 499 } 500 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 501 if (!hci_stack->link_key_db) return; 502 hci_stack->link_key_db->iterator_done(it); 503 } 504 #endif 505 506 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 507 switch (address_type){ 508 case BD_ADDR_TYPE_LE_PUBLIC: 509 case BD_ADDR_TYPE_LE_RANDOM: 510 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 511 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 512 return true; 513 default: 514 return false; 515 } 516 } 517 518 static int hci_is_le_connection(hci_connection_t * connection){ 519 return hci_is_le_connection_type(connection->address_type); 520 } 521 522 /** 523 * count connections 524 */ 525 static int nr_hci_connections(void){ 526 int count = 0; 527 btstack_linked_item_t *it; 528 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 529 count++; 530 } 531 return count; 532 } 533 534 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 535 536 unsigned int num_packets_sent_classic = 0; 537 unsigned int num_packets_sent_le = 0; 538 539 btstack_linked_item_t *it; 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (hci_is_le_connection(connection)){ 543 num_packets_sent_le += connection->num_packets_sent; 544 } 545 if (connection->address_type == BD_ADDR_TYPE_ACL){ 546 num_packets_sent_classic += connection->num_packets_sent; 547 } 548 } 549 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 550 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 551 int free_slots_le = 0; 552 553 if (free_slots_classic < 0){ 554 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 555 return 0; 556 } 557 558 if (hci_stack->le_acl_packets_total_num){ 559 // if we have LE slots, they are used 560 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 561 if (free_slots_le < 0){ 562 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 563 return 0; 564 } 565 } else { 566 // otherwise, classic slots are used for LE, too 567 free_slots_classic -= num_packets_sent_le; 568 if (free_slots_classic < 0){ 569 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 570 return 0; 571 } 572 } 573 574 switch (address_type){ 575 case BD_ADDR_TYPE_UNKNOWN: 576 log_error("hci_number_free_acl_slots: unknown address type"); 577 return 0; 578 579 case BD_ADDR_TYPE_ACL: 580 return free_slots_classic; 581 582 default: 583 if (hci_stack->le_acl_packets_total_num){ 584 return free_slots_le; 585 } 586 return free_slots_classic; 587 } 588 } 589 590 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 591 // get connection type 592 hci_connection_t * connection = hci_connection_for_handle(con_handle); 593 if (!connection){ 594 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 595 return 0; 596 } 597 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 598 } 599 600 #ifdef ENABLE_CLASSIC 601 static int hci_number_free_sco_slots(void){ 602 unsigned int num_sco_packets_sent = 0; 603 btstack_linked_item_t *it; 604 if (hci_stack->synchronous_flow_control_enabled){ 605 // explicit flow control 606 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 607 hci_connection_t * connection = (hci_connection_t *) it; 608 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 609 num_sco_packets_sent += connection->num_packets_sent; 610 } 611 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 612 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 613 return 0; 614 } 615 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 616 } else { 617 // implicit flow control -- TODO 618 int num_ready = 0; 619 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 620 hci_connection_t * connection = (hci_connection_t *) it; 621 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 622 if (connection->sco_tx_ready == 0) continue; 623 num_ready++; 624 } 625 return num_ready; 626 } 627 } 628 #endif 629 630 // only used to send HCI Host Number Completed Packets 631 static int hci_can_send_comand_packet_transport(void){ 632 if (hci_stack->hci_packet_buffer_reserved) return 0; 633 634 // check for async hci transport implementations 635 if (hci_stack->hci_transport->can_send_packet_now){ 636 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 637 return 0; 638 } 639 } 640 return 1; 641 } 642 643 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 644 bool hci_can_send_command_packet_now(void){ 645 if (hci_can_send_comand_packet_transport() == 0) return false; 646 return hci_stack->num_cmd_packets > 0u; 647 } 648 649 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 650 // check for async hci transport implementations 651 if (!hci_stack->hci_transport->can_send_packet_now) return true; 652 return hci_stack->hci_transport->can_send_packet_now(packet_type); 653 } 654 655 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 657 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 658 } 659 660 bool hci_can_send_acl_le_packet_now(void){ 661 if (hci_stack->hci_packet_buffer_reserved) return false; 662 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 663 } 664 665 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 668 } 669 670 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_now(con_handle); 673 } 674 675 #ifdef ENABLE_CLASSIC 676 bool hci_can_send_acl_classic_packet_now(void){ 677 if (hci_stack->hci_packet_buffer_reserved) return false; 678 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 679 } 680 681 bool hci_can_send_prepared_sco_packet_now(void){ 682 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 683 if (hci_have_usb_transport()){ 684 return hci_stack->sco_can_send_now; 685 } else { 686 return hci_number_free_sco_slots() > 0; 687 } 688 } 689 690 bool hci_can_send_sco_packet_now(void){ 691 if (hci_stack->hci_packet_buffer_reserved) return false; 692 return hci_can_send_prepared_sco_packet_now(); 693 } 694 695 void hci_request_sco_can_send_now_event(void){ 696 hci_stack->sco_waiting_for_can_send_now = 1; 697 hci_notify_if_sco_can_send_now(); 698 } 699 #endif 700 701 // used for internal checks in l2cap.c 702 bool hci_is_packet_buffer_reserved(void){ 703 return hci_stack->hci_packet_buffer_reserved; 704 } 705 706 // reserves outgoing packet buffer. @returns 1 if successful 707 bool hci_reserve_packet_buffer(void){ 708 if (hci_stack->hci_packet_buffer_reserved) { 709 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 710 return false; 711 } 712 hci_stack->hci_packet_buffer_reserved = true; 713 return true; 714 } 715 716 void hci_release_packet_buffer(void){ 717 hci_stack->hci_packet_buffer_reserved = false; 718 } 719 720 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 721 static int hci_transport_synchronous(void){ 722 return hci_stack->hci_transport->can_send_packet_now == NULL; 723 } 724 725 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 726 727 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 728 729 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 730 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 731 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 732 max_acl_data_packet_length = hci_stack->le_data_packets_length; 733 } 734 735 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 736 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 737 max_acl_data_packet_length = connection->le_max_tx_octets; 738 } 739 #endif 740 741 log_debug("hci_send_acl_packet_fragments entered"); 742 743 uint8_t status = ERROR_CODE_SUCCESS; 744 // multiple packets could be send on a synchronous HCI transport 745 while (true){ 746 747 log_debug("hci_send_acl_packet_fragments loop entered"); 748 749 // get current data 750 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 751 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 752 bool more_fragments = false; 753 754 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 755 if (current_acl_data_packet_length > max_acl_data_packet_length){ 756 more_fragments = true; 757 current_acl_data_packet_length = max_acl_data_packet_length; 758 } 759 760 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 761 if (acl_header_pos > 0u){ 762 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 763 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 764 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 765 } 766 767 // update header len 768 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 769 770 // count packet 771 connection->num_packets_sent++; 772 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 773 774 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 775 if (more_fragments){ 776 // update start of next fragment to send 777 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 778 } else { 779 // done 780 hci_stack->acl_fragmentation_pos = 0; 781 hci_stack->acl_fragmentation_total_size = 0; 782 } 783 784 // send packet 785 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 786 const int size = current_acl_data_packet_length + 4; 787 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 788 hci_stack->acl_fragmentation_tx_active = 1; 789 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 790 if (err != 0){ 791 // no error from HCI Transport expected 792 status = ERROR_CODE_HARDWARE_FAILURE; 793 } 794 795 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 796 797 // done yet? 798 if (!more_fragments) break; 799 800 // can send more? 801 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 802 } 803 804 log_debug("hci_send_acl_packet_fragments loop over"); 805 806 // release buffer now for synchronous transport 807 if (hci_transport_synchronous()){ 808 hci_stack->acl_fragmentation_tx_active = 0; 809 hci_release_packet_buffer(); 810 hci_emit_transport_packet_sent(); 811 } 812 813 return status; 814 } 815 816 // pre: caller has reserved the packet buffer 817 uint8_t hci_send_acl_packet_buffer(int size){ 818 btstack_assert(hci_stack->hci_packet_buffer_reserved); 819 820 uint8_t * packet = hci_stack->hci_packet_buffer; 821 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 822 823 // check for free places on Bluetooth module 824 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 825 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return BTSTACK_ACL_BUFFERS_FULL; 829 } 830 831 hci_connection_t *connection = hci_connection_for_handle( con_handle); 832 if (!connection) { 833 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 834 hci_release_packet_buffer(); 835 hci_emit_transport_packet_sent(); 836 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 837 } 838 839 #ifdef ENABLE_CLASSIC 840 hci_connection_timestamp(connection); 841 #endif 842 843 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 844 845 // setup data 846 hci_stack->acl_fragmentation_total_size = size; 847 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 848 849 return hci_send_acl_packet_fragments(connection); 850 } 851 852 #ifdef ENABLE_CLASSIC 853 // pre: caller has reserved the packet buffer 854 uint8_t hci_send_sco_packet_buffer(int size){ 855 btstack_assert(hci_stack->hci_packet_buffer_reserved); 856 857 uint8_t * packet = hci_stack->hci_packet_buffer; 858 859 // skip checks in loopback mode 860 if (!hci_stack->loopback_mode){ 861 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 862 863 // check for free places on Bluetooth module 864 if (!hci_can_send_prepared_sco_packet_now()) { 865 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 866 hci_release_packet_buffer(); 867 hci_emit_transport_packet_sent(); 868 return BTSTACK_ACL_BUFFERS_FULL; 869 } 870 871 // track send packet in connection struct 872 hci_connection_t *connection = hci_connection_for_handle( con_handle); 873 if (!connection) { 874 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 875 hci_release_packet_buffer(); 876 hci_emit_transport_packet_sent(); 877 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 878 } 879 880 if (hci_have_usb_transport()){ 881 // token used 882 hci_stack->sco_can_send_now = false; 883 } else { 884 if (hci_stack->synchronous_flow_control_enabled){ 885 connection->num_packets_sent++; 886 } else { 887 connection->sco_tx_ready--; 888 } 889 } 890 } 891 892 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 893 894 #ifdef HAVE_SCO_TRANSPORT 895 hci_stack->sco_transport->send_packet(packet, size); 896 hci_release_packet_buffer(); 897 hci_emit_transport_packet_sent(); 898 899 return 0; 900 #else 901 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 902 if (hci_transport_synchronous()){ 903 hci_release_packet_buffer(); 904 hci_emit_transport_packet_sent(); 905 } 906 907 if (err != 0){ 908 return ERROR_CODE_HARDWARE_FAILURE; 909 } 910 return ERROR_CODE_SUCCESS; 911 #endif 912 } 913 #endif 914 915 static void acl_handler(uint8_t *packet, uint16_t size){ 916 917 // get info 918 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 919 hci_connection_t *conn = hci_connection_for_handle(con_handle); 920 uint8_t acl_flags = READ_ACL_FLAGS(packet); 921 uint16_t acl_length = READ_ACL_LENGTH(packet); 922 923 // ignore non-registered handle 924 if (!conn){ 925 log_error("acl_handler called with non-registered handle %u!" , con_handle); 926 return; 927 } 928 929 // assert packet is complete 930 if ((acl_length + 4u) != size){ 931 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 932 return; 933 } 934 935 #ifdef ENABLE_CLASSIC 936 // update idle timestamp 937 hci_connection_timestamp(conn); 938 #endif 939 940 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 941 hci_stack->host_completed_packets = 1; 942 conn->num_packets_completed++; 943 #endif 944 945 // handle different packet types 946 switch (acl_flags & 0x03u) { 947 948 case 0x01: // continuation fragment 949 950 // sanity checks 951 if (conn->acl_recombination_pos == 0u) { 952 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 953 return; 954 } 955 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 956 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 957 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 958 conn->acl_recombination_pos = 0; 959 return; 960 } 961 962 // append fragment payload (header already stored) 963 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 964 &packet[4], acl_length); 965 conn->acl_recombination_pos += acl_length; 966 967 // forward complete L2CAP packet if complete. 968 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 969 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 970 // reset recombination buffer 971 conn->acl_recombination_length = 0; 972 conn->acl_recombination_pos = 0; 973 } 974 break; 975 976 case 0x02: { // first fragment 977 978 // sanity check 979 if (conn->acl_recombination_pos) { 980 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 981 conn->acl_recombination_pos = 0; 982 } 983 984 // peek into L2CAP packet! 985 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 986 987 // compare fragment size to L2CAP packet size 988 if (acl_length >= (l2cap_length + 4u)){ 989 // forward fragment as L2CAP packet 990 hci_emit_acl_packet(packet, acl_length + 4u); 991 } else { 992 993 if (acl_length > HCI_ACL_BUFFER_SIZE){ 994 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 995 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 996 return; 997 } 998 999 // store first fragment and tweak acl length for complete package 1000 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1001 packet, acl_length + 4u); 1002 conn->acl_recombination_pos = acl_length + 4u; 1003 conn->acl_recombination_length = l2cap_length; 1004 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1005 } 1006 break; 1007 1008 } 1009 default: 1010 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1011 return; 1012 } 1013 1014 // execute main loop 1015 hci_run(); 1016 } 1017 1018 static void hci_connection_stop_timer(hci_connection_t * conn){ 1019 btstack_run_loop_remove_timer(&conn->timeout); 1020 #ifdef ENABLE_CLASSIC 1021 btstack_run_loop_remove_timer(&conn->timeout_sco); 1022 #endif 1023 } 1024 1025 static void hci_shutdown_connection(hci_connection_t *conn){ 1026 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1027 1028 #ifdef ENABLE_CLASSIC 1029 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1030 bd_addr_type_t addr_type = conn->address_type; 1031 #endif 1032 #ifdef HAVE_SCO_TRANSPORT 1033 hci_con_handle_t con_handle = conn->con_handle; 1034 #endif 1035 #endif 1036 1037 hci_connection_stop_timer(conn); 1038 1039 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1040 btstack_memory_hci_connection_free( conn ); 1041 1042 // now it's gone 1043 hci_emit_nr_connections_changed(); 1044 1045 #ifdef ENABLE_CLASSIC 1046 #ifdef ENABLE_SCO_OVER_HCI 1047 // update SCO 1048 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1049 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1050 } 1051 #endif 1052 #ifdef HAVE_SCO_TRANSPORT 1053 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1054 hci_stack->sco_transport->close(con_handle); 1055 } 1056 #endif 1057 #endif 1058 } 1059 1060 #ifdef ENABLE_CLASSIC 1061 1062 static const uint16_t packet_type_sizes[] = { 1063 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1064 HCI_ACL_DH1_SIZE, 0, 0, 0, 1065 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1066 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1067 }; 1068 static const uint8_t packet_type_feature_requirement_bit[] = { 1069 0, // 3 slot packets 1070 1, // 5 slot packets 1071 25, // EDR 2 mpbs 1072 26, // EDR 3 mbps 1073 39, // 3 slot EDR packts 1074 40, // 5 slot EDR packet 1075 }; 1076 static const uint16_t packet_type_feature_packet_mask[] = { 1077 0x0f00, // 3 slot packets 1078 0xf000, // 5 slot packets 1079 0x1102, // EDR 2 mpbs 1080 0x2204, // EDR 3 mbps 1081 0x0300, // 3 slot EDR packts 1082 0x3000, // 5 slot EDR packet 1083 }; 1084 1085 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1086 // enable packet types based on size 1087 uint16_t packet_types = 0; 1088 unsigned int i; 1089 for (i=0;i<16;i++){ 1090 if (packet_type_sizes[i] == 0) continue; 1091 if (packet_type_sizes[i] <= buffer_size){ 1092 packet_types |= 1 << i; 1093 } 1094 } 1095 // disable packet types due to missing local supported features 1096 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1097 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1098 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1099 if (feature_set) continue; 1100 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1101 packet_types &= ~packet_type_feature_packet_mask[i]; 1102 } 1103 // flip bits for "may not be used" 1104 packet_types ^= 0x3306; 1105 return packet_types; 1106 } 1107 1108 uint16_t hci_usable_acl_packet_types(void){ 1109 return hci_stack->packet_types; 1110 } 1111 #endif 1112 1113 uint8_t* hci_get_outgoing_packet_buffer(void){ 1114 // hci packet buffer is >= acl data packet length 1115 return hci_stack->hci_packet_buffer; 1116 } 1117 1118 uint16_t hci_max_acl_data_packet_length(void){ 1119 return hci_stack->acl_data_packet_length; 1120 } 1121 1122 #ifdef ENABLE_CLASSIC 1123 bool hci_extended_sco_link_supported(void){ 1124 // No. 31, byte 3, bit 7 1125 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1126 } 1127 #endif 1128 1129 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1130 // No. 54, byte 6, bit 6 1131 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1132 } 1133 1134 static int gap_ssp_supported(void){ 1135 // No. 51, byte 6, bit 3 1136 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1137 } 1138 1139 static int hci_classic_supported(void){ 1140 #ifdef ENABLE_CLASSIC 1141 // No. 37, byte 4, bit 5, = No BR/EDR Support 1142 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1143 #else 1144 return 0; 1145 #endif 1146 } 1147 1148 static int hci_le_supported(void){ 1149 #ifdef ENABLE_BLE 1150 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1151 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1152 #else 1153 return 0; 1154 #endif 1155 } 1156 1157 #ifdef ENABLE_BLE 1158 1159 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1160 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1161 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1162 } else { 1163 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1164 } 1165 } 1166 1167 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1168 *addr_type = hci_stack->le_own_addr_type; 1169 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1170 } 1171 1172 #ifdef ENABLE_LE_PERIPHERAL 1173 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1174 *addr_type = hci_stack->le_advertisements_own_addr_type; 1175 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1176 }; 1177 #endif 1178 1179 #ifdef ENABLE_LE_CENTRAL 1180 1181 /** 1182 * @brief Get own addr type and address used for LE connections (Central) 1183 */ 1184 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1185 *addr_type = hci_stack->le_connection_own_addr_type; 1186 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1187 } 1188 1189 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1190 1191 int offset = 3; 1192 int num_reports = packet[offset]; 1193 offset += 1; 1194 1195 int i; 1196 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1197 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1198 for (i=0; (i<num_reports) && (offset < size);i++){ 1199 // sanity checks on data_length: 1200 uint8_t data_length = packet[offset + 8]; 1201 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1202 if ((offset + 9u + data_length + 1u) > size) return; 1203 // setup event 1204 uint8_t event_size = 10u + data_length; 1205 int pos = 0; 1206 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1207 event[pos++] = event_size; 1208 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1209 offset += 8; 1210 pos += 8; 1211 event[pos++] = packet[offset + 1 + data_length]; // rssi 1212 event[pos++] = data_length; 1213 offset++; 1214 (void)memcpy(&event[pos], &packet[offset], data_length); 1215 pos += data_length; 1216 offset += data_length + 1u; // rssi 1217 hci_emit_event(event, pos, 1); 1218 } 1219 } 1220 #endif 1221 #endif 1222 1223 #ifdef ENABLE_BLE 1224 #ifdef ENABLE_LE_PERIPHERAL 1225 static void hci_update_advertisements_enabled_for_current_roles(void){ 1226 if (hci_stack->le_advertisements_enabled){ 1227 // get number of active le slave connections 1228 int num_slave_connections = 0; 1229 btstack_linked_list_iterator_t it; 1230 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1231 while (btstack_linked_list_iterator_has_next(&it)){ 1232 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1233 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1234 if (con->state != OPEN) continue; 1235 if (con->role != HCI_ROLE_SLAVE) continue; 1236 if (!hci_is_le_connection(con)) continue; 1237 num_slave_connections++; 1238 } 1239 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1240 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1241 } else { 1242 hci_stack->le_advertisements_enabled_for_current_roles = false; 1243 } 1244 } 1245 #endif 1246 #endif 1247 1248 #ifdef ENABLE_CLASSIC 1249 static void gap_run_set_local_name(void){ 1250 hci_reserve_packet_buffer(); 1251 uint8_t * packet = hci_stack->hci_packet_buffer; 1252 // construct HCI Command and send 1253 uint16_t opcode = hci_write_local_name.opcode; 1254 hci_stack->last_cmd_opcode = opcode; 1255 packet[0] = opcode & 0xff; 1256 packet[1] = opcode >> 8; 1257 packet[2] = DEVICE_NAME_LEN; 1258 memset(&packet[3], 0, DEVICE_NAME_LEN); 1259 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1260 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1261 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1262 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1263 // expand '00:00:00:00:00:00' in name with bd_addr 1264 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1265 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1266 } 1267 1268 static void gap_run_set_eir_data(void){ 1269 hci_reserve_packet_buffer(); 1270 uint8_t * packet = hci_stack->hci_packet_buffer; 1271 // construct HCI Command in-place and send 1272 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1273 hci_stack->last_cmd_opcode = opcode; 1274 uint16_t offset = 0; 1275 packet[offset++] = opcode & 0xff; 1276 packet[offset++] = opcode >> 8; 1277 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1278 packet[offset++] = 0; // FEC not required 1279 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1280 if (hci_stack->eir_data){ 1281 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1282 ad_context_t context; 1283 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1284 uint8_t data_type = ad_iterator_get_data_type(&context); 1285 uint8_t size = ad_iterator_get_data_len(&context); 1286 const uint8_t *data = ad_iterator_get_data(&context); 1287 // copy item 1288 packet[offset++] = size + 1; 1289 packet[offset++] = data_type; 1290 memcpy(&packet[offset], data, size); 1291 // update name item 1292 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1293 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1294 } 1295 offset += size; 1296 } 1297 } else { 1298 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1299 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1300 packet[offset++] = bytes_to_copy + 1; 1301 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1302 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1303 // expand '00:00:00:00:00:00' in name with bd_addr 1304 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1305 } 1306 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1307 } 1308 #endif 1309 1310 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1311 1312 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1313 if (!hci_stack->config) return 0; 1314 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1315 // Limit baud rate for Broadcom chipsets to 3 mbps 1316 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1317 baud_rate = 3000000; 1318 } 1319 return baud_rate; 1320 } 1321 1322 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1323 UNUSED(ds); 1324 1325 switch (hci_stack->substate){ 1326 case HCI_INIT_W4_SEND_RESET: 1327 log_info("Resend HCI Reset"); 1328 hci_stack->substate = HCI_INIT_SEND_RESET; 1329 hci_stack->num_cmd_packets = 1; 1330 hci_run(); 1331 break; 1332 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1333 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1334 if (hci_stack->hci_transport->reset_link){ 1335 hci_stack->hci_transport->reset_link(); 1336 } 1337 1338 /* fall through */ 1339 1340 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1341 log_info("Resend HCI Reset - CSR Warm Boot"); 1342 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1343 hci_stack->num_cmd_packets = 1; 1344 hci_run(); 1345 break; 1346 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1347 if (hci_stack->hci_transport->set_baudrate){ 1348 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1349 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1350 hci_stack->hci_transport->set_baudrate(baud_rate); 1351 } 1352 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1353 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1354 if (hci_stack->hci_transport->reset_link){ 1355 log_info("Link Reset"); 1356 hci_stack->hci_transport->reset_link(); 1357 } 1358 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1359 hci_run(); 1360 } 1361 break; 1362 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1363 // otherwise continue 1364 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1365 hci_send_cmd(&hci_read_local_supported_commands); 1366 break; 1367 default: 1368 break; 1369 } 1370 } 1371 #endif 1372 1373 static void hci_initializing_next_state(void){ 1374 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1375 } 1376 1377 // assumption: hci_can_send_command_packet_now() == true 1378 static void hci_initializing_run(void){ 1379 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1380 switch (hci_stack->substate){ 1381 case HCI_INIT_SEND_RESET: 1382 hci_state_reset(); 1383 1384 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1385 // prepare reset if command complete not received in 100ms 1386 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1387 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1388 btstack_run_loop_add_timer(&hci_stack->timeout); 1389 #endif 1390 // send command 1391 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1392 hci_send_cmd(&hci_reset); 1393 break; 1394 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1395 hci_send_cmd(&hci_read_local_version_information); 1396 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1397 break; 1398 case HCI_INIT_SEND_READ_LOCAL_NAME: 1399 hci_send_cmd(&hci_read_local_name); 1400 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1401 break; 1402 1403 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1404 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1405 hci_state_reset(); 1406 // prepare reset if command complete not received in 100ms 1407 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1408 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1409 btstack_run_loop_add_timer(&hci_stack->timeout); 1410 // send command 1411 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1412 hci_send_cmd(&hci_reset); 1413 break; 1414 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1415 hci_state_reset(); 1416 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1417 hci_send_cmd(&hci_reset); 1418 break; 1419 case HCI_INIT_SEND_BAUD_CHANGE: { 1420 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1421 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1422 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1423 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1424 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1425 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1426 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1427 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1428 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1429 btstack_run_loop_add_timer(&hci_stack->timeout); 1430 } 1431 break; 1432 } 1433 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1434 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1435 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1436 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1437 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1438 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1439 break; 1440 } 1441 case HCI_INIT_CUSTOM_INIT: 1442 // Custom initialization 1443 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1444 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1445 bool send_cmd = false; 1446 switch (hci_stack->chipset_result){ 1447 case BTSTACK_CHIPSET_VALID_COMMAND: 1448 send_cmd = true; 1449 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1450 break; 1451 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1452 send_cmd = true; 1453 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1454 log_info("CSR Warm Boot"); 1455 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1456 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1457 btstack_run_loop_add_timer(&hci_stack->timeout); 1458 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1459 && hci_stack->config 1460 && hci_stack->chipset 1461 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1462 && hci_stack->hci_transport->set_baudrate 1463 && hci_transport_uart_get_main_baud_rate()){ 1464 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1465 } else { 1466 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1467 } 1468 break; 1469 default: 1470 break; 1471 } 1472 1473 if (send_cmd){ 1474 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1475 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1476 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1477 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1478 break; 1479 } 1480 log_info("Init script done"); 1481 1482 // Init script download on Broadcom chipsets causes: 1483 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1484 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1485 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1486 1487 // - baud rate to reset, restore UART baud rate if needed 1488 int need_baud_change = hci_stack->config 1489 && hci_stack->chipset 1490 && hci_stack->chipset->set_baudrate_command 1491 && hci_stack->hci_transport->set_baudrate 1492 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1493 if (need_baud_change) { 1494 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1495 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1496 hci_stack->hci_transport->set_baudrate(baud_rate); 1497 } 1498 1499 uint16_t bcm_delay_ms = 300; 1500 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1501 // -> Work around: wait here. 1502 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1503 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1504 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1505 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1506 btstack_run_loop_add_timer(&hci_stack->timeout); 1507 break; 1508 } 1509 } 1510 // otherwise continue 1511 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1512 hci_send_cmd(&hci_read_local_supported_commands); 1513 break; 1514 case HCI_INIT_SET_BD_ADDR: 1515 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1516 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1517 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1518 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1519 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1520 break; 1521 #endif 1522 1523 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1524 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1525 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1526 hci_send_cmd(&hci_read_local_supported_commands); 1527 break; 1528 case HCI_INIT_READ_BD_ADDR: 1529 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1530 hci_send_cmd(&hci_read_bd_addr); 1531 break; 1532 case HCI_INIT_READ_BUFFER_SIZE: 1533 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1534 hci_send_cmd(&hci_read_buffer_size); 1535 break; 1536 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1537 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1538 hci_send_cmd(&hci_read_local_supported_features); 1539 break; 1540 1541 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1542 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1543 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1544 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1545 break; 1546 case HCI_INIT_HOST_BUFFER_SIZE: 1547 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1548 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1549 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1550 break; 1551 #endif 1552 1553 case HCI_INIT_SET_EVENT_MASK: 1554 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1555 if (hci_le_supported()){ 1556 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1557 } else { 1558 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1559 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1560 } 1561 break; 1562 1563 #ifdef ENABLE_CLASSIC 1564 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1565 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1566 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1567 break; 1568 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1569 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1570 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1571 break; 1572 case HCI_INIT_WRITE_INQUIRY_MODE: 1573 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1574 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1575 break; 1576 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1577 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1578 hci_stack->secure_connections_active = true; 1579 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1580 break; 1581 case HCI_INIT_WRITE_SCAN_ENABLE: 1582 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1583 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1584 break; 1585 // only sent if ENABLE_SCO_OVER_HCI is defined 1586 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1587 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1588 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1589 break; 1590 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1591 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1592 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1593 break; 1594 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1595 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1596 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1597 #ifdef ENABLE_SCO_OVER_HCI 1598 log_info("BCM: Route SCO data via HCI transport"); 1599 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1600 #endif 1601 #ifdef ENABLE_SCO_OVER_PCM 1602 log_info("BCM: Route SCO data via PCM interface"); 1603 #ifdef ENABLE_BCM_PCM_WBS 1604 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1605 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1606 #else 1607 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1608 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1609 #endif 1610 #endif 1611 break; 1612 #ifdef ENABLE_SCO_OVER_PCM 1613 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1614 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1615 log_info("BCM: Config PCM interface for I2S"); 1616 #ifdef ENABLE_BCM_PCM_WBS 1617 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1618 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1619 #else 1620 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1621 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1622 #endif 1623 break; 1624 #endif 1625 #endif 1626 1627 #ifdef ENABLE_BLE 1628 // LE INIT 1629 case HCI_INIT_LE_READ_BUFFER_SIZE: 1630 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1631 hci_send_cmd(&hci_le_read_buffer_size); 1632 break; 1633 case HCI_INIT_LE_SET_EVENT_MASK: 1634 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1635 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1636 break; 1637 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1638 // LE Supported Host = 1, Simultaneous Host = 0 1639 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1640 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1641 break; 1642 #endif 1643 1644 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1645 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1646 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1647 hci_send_cmd(&hci_le_read_maximum_data_length); 1648 break; 1649 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1650 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1651 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1652 break; 1653 #endif 1654 1655 #ifdef ENABLE_LE_CENTRAL 1656 case HCI_INIT_READ_WHITE_LIST_SIZE: 1657 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1658 hci_send_cmd(&hci_le_read_white_list_size); 1659 break; 1660 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1661 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1662 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1663 break; 1664 #endif 1665 default: 1666 return; 1667 } 1668 } 1669 1670 static void hci_init_done(void){ 1671 // done. tell the app 1672 log_info("hci_init_done -> HCI_STATE_WORKING"); 1673 hci_stack->state = HCI_STATE_WORKING; 1674 hci_emit_state(); 1675 hci_run(); 1676 } 1677 1678 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1679 bool command_completed = false; 1680 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1681 uint16_t opcode = little_endian_read_16(packet,3); 1682 if (opcode == hci_stack->last_cmd_opcode){ 1683 command_completed = true; 1684 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1685 } else { 1686 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1687 } 1688 } 1689 1690 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1691 uint8_t status = packet[2]; 1692 uint16_t opcode = little_endian_read_16(packet,4); 1693 if (opcode == hci_stack->last_cmd_opcode){ 1694 if (status){ 1695 command_completed = true; 1696 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1697 } else { 1698 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1699 } 1700 } else { 1701 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1702 } 1703 } 1704 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1705 // Vendor == CSR 1706 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1707 // TODO: track actual command 1708 command_completed = true; 1709 } 1710 1711 // Vendor == Toshiba 1712 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1713 // TODO: track actual command 1714 command_completed = true; 1715 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1716 hci_stack->num_cmd_packets = 1; 1717 } 1718 #endif 1719 1720 return command_completed; 1721 } 1722 1723 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1724 1725 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1726 1727 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1728 1729 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1730 1731 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1732 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1733 // 1734 // HCI Reset 1735 // Timeout 100 ms 1736 // HCI Reset 1737 // Command Complete Reset 1738 // HCI Read Local Version Information 1739 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1740 // hang... 1741 // 1742 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1743 if (!command_completed 1744 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1745 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1746 1747 uint16_t opcode = little_endian_read_16(packet,3); 1748 if (opcode == hci_reset.opcode){ 1749 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1750 return; 1751 } 1752 } 1753 1754 // CSR & H5 1755 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1756 if (!command_completed 1757 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1758 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1759 1760 uint16_t opcode = little_endian_read_16(packet,3); 1761 if (opcode == hci_reset.opcode){ 1762 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1763 return; 1764 } 1765 } 1766 1767 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1768 // fix: Correct substate and behave as command below 1769 if (command_completed){ 1770 switch (hci_stack->substate){ 1771 case HCI_INIT_SEND_RESET: 1772 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1773 break; 1774 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1775 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1776 break; 1777 default: 1778 break; 1779 } 1780 } 1781 1782 #endif 1783 1784 if (!command_completed) return; 1785 1786 bool need_baud_change = false; 1787 bool need_addr_change = false; 1788 1789 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1790 need_baud_change = hci_stack->config 1791 && hci_stack->chipset 1792 && hci_stack->chipset->set_baudrate_command 1793 && hci_stack->hci_transport->set_baudrate 1794 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1795 1796 need_addr_change = hci_stack->custom_bd_addr_set 1797 && hci_stack->chipset 1798 && hci_stack->chipset->set_bd_addr_command; 1799 #endif 1800 1801 switch(hci_stack->substate){ 1802 1803 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1804 case HCI_INIT_SEND_RESET: 1805 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1806 // fix: just correct substate and behave as command below 1807 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1808 btstack_run_loop_remove_timer(&hci_stack->timeout); 1809 break; 1810 case HCI_INIT_W4_SEND_RESET: 1811 btstack_run_loop_remove_timer(&hci_stack->timeout); 1812 break; 1813 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1814 log_info("Received local name, need baud change %d", (int) need_baud_change); 1815 if (need_baud_change){ 1816 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1817 return; 1818 } 1819 // skip baud change 1820 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1821 return; 1822 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1823 // for STLC2500D, baud rate change already happened. 1824 // for others, baud rate gets changed now 1825 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1826 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1827 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1828 hci_stack->hci_transport->set_baudrate(baud_rate); 1829 } 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1833 btstack_run_loop_remove_timer(&hci_stack->timeout); 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 case HCI_INIT_W4_CUSTOM_INIT: 1837 // repeat custom init 1838 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1839 return; 1840 #else 1841 case HCI_INIT_W4_SEND_RESET: 1842 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1843 return ; 1844 #endif 1845 1846 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1847 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1848 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1849 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1850 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1851 return; 1852 } 1853 if (need_addr_change){ 1854 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1855 return; 1856 } 1857 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1858 return; 1859 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1860 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1861 if (need_baud_change){ 1862 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1863 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1864 hci_stack->hci_transport->set_baudrate(baud_rate); 1865 } 1866 if (need_addr_change){ 1867 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1868 return; 1869 } 1870 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1871 return; 1872 case HCI_INIT_W4_SET_BD_ADDR: 1873 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1874 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1875 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1876 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1877 return; 1878 } 1879 // skipping st warm boot 1880 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1881 return; 1882 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1883 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1884 return; 1885 #endif 1886 case HCI_INIT_W4_READ_BD_ADDR: 1887 // only read buffer size if supported 1888 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1889 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1890 return; 1891 } 1892 // skipping read buffer size 1893 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1894 return; 1895 case HCI_INIT_W4_SET_EVENT_MASK: 1896 // skip Classic init commands for LE only chipsets 1897 if (!hci_classic_supported()){ 1898 #ifdef ENABLE_BLE 1899 if (hci_le_supported()){ 1900 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1901 return; 1902 } 1903 #endif 1904 log_error("Neither BR/EDR nor LE supported"); 1905 hci_init_done(); 1906 return; 1907 } 1908 if (!gap_ssp_supported()){ 1909 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1910 return; 1911 } 1912 break; 1913 #ifdef ENABLE_BLE 1914 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1915 // skip write le host if not supported (e.g. on LE only EM9301) 1916 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1917 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1918 return; 1919 1920 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1921 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1922 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1923 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1924 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1925 return; 1926 } 1927 // explicit fall through to reduce repetitions 1928 1929 #ifdef ENABLE_LE_CENTRAL 1930 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1931 #else 1932 hci_init_done(); 1933 #endif 1934 return; 1935 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1936 1937 #endif /* ENABLE_BLE */ 1938 1939 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1940 // skip write secure connections host support if not supported or disabled 1941 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1942 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1943 return; 1944 } 1945 break; 1946 1947 #ifdef ENABLE_SCO_OVER_HCI 1948 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1949 // skip write synchronous flow control if not supported 1950 if (hci_stack->local_supported_commands[0] & 0x04) break; 1951 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1952 1953 /* fall through */ 1954 1955 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1956 // skip write default erroneous data reporting if not supported 1957 if (hci_stack->local_supported_commands[0] & 0x08) break; 1958 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1959 1960 /* fall through */ 1961 1962 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1963 // skip bcm set sco pcm config on non-Broadcom chipsets 1964 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1965 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1966 1967 /* fall through */ 1968 1969 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1970 if (!hci_le_supported()){ 1971 // SKIP LE init for Classic only configuration 1972 hci_init_done(); 1973 return; 1974 } 1975 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1976 break; 1977 1978 #else /* !ENABLE_SCO_OVER_HCI */ 1979 1980 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1981 #ifdef ENABLE_SCO_OVER_PCM 1982 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1983 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1984 return; 1985 } 1986 #endif 1987 /* fall through */ 1988 1989 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1990 #ifdef ENABLE_BLE 1991 if (hci_le_supported()){ 1992 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1993 return; 1994 } 1995 #endif 1996 // SKIP LE init for Classic only configuration 1997 hci_init_done(); 1998 return; 1999 #endif /* ENABLE_SCO_OVER_HCI */ 2000 2001 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 2002 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 2003 // Response to command before init done state -> init done 2004 case (HCI_INIT_DONE-1): 2005 hci_init_done(); 2006 return; 2007 #endif 2008 2009 default: 2010 break; 2011 } 2012 hci_initializing_next_state(); 2013 } 2014 2015 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2016 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2017 bd_addr_t bd_address; 2018 (void)memcpy(&bd_address, conn->address, 6); 2019 2020 #ifdef ENABLE_CLASSIC 2021 // cache needed data 2022 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2023 #endif 2024 2025 // connection failed, remove entry 2026 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2027 btstack_memory_hci_connection_free( conn ); 2028 2029 #ifdef ENABLE_CLASSIC 2030 // notify client if dedicated bonding 2031 if (notify_dedicated_bonding_failed){ 2032 log_info("hci notify_dedicated_bonding_failed"); 2033 hci_emit_dedicated_bonding_result(bd_address, status); 2034 } 2035 2036 // if authentication error, also delete link key 2037 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2038 gap_drop_link_key_for_bd_addr(bd_address); 2039 } 2040 #else 2041 UNUSED(status); 2042 #endif 2043 } 2044 2045 #ifdef ENABLE_CLASSIC 2046 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2047 // SSP Controller 2048 if (features[6] & (1 << 3)){ 2049 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2050 } 2051 // eSCO 2052 if (features[3] & (1<<7)){ 2053 conn->remote_supported_features[0] |= 1; 2054 } 2055 // Extended features 2056 if (features[7] & (1<<7)){ 2057 conn->remote_supported_features[0] |= 2; 2058 } 2059 } 2060 2061 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2062 // SSP Host 2063 if (features[0] & (1 << 0)){ 2064 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2065 } 2066 // SC Host 2067 if (features[0] & (1 << 3)){ 2068 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2069 } 2070 } 2071 2072 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2073 // SC Controller 2074 if (features[1] & (1 << 0)){ 2075 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2076 } 2077 } 2078 2079 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2080 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2081 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2082 if (conn->bonding_flags & BONDING_DEDICATED){ 2083 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2084 } 2085 } 2086 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2087 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2088 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2089 } 2090 2091 #endif 2092 2093 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2094 // handle BT initialization 2095 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2096 hci_initializing_event_handler(packet, size); 2097 } 2098 2099 // help with BT sleep 2100 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2101 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2102 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2103 hci_initializing_next_state(); 2104 } 2105 } 2106 2107 #ifdef ENABLE_CLASSIC 2108 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2109 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2110 conn->encryption_key_size = encryption_key_size; 2111 2112 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2113 conn->requested_security_level = LEVEL_0; 2114 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2115 return; 2116 } 2117 2118 // Request Authentication if not already done 2119 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2120 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2121 } 2122 #endif 2123 2124 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2125 UNUSED(size); 2126 2127 uint16_t manufacturer; 2128 #ifdef ENABLE_CLASSIC 2129 hci_con_handle_t handle; 2130 hci_connection_t * conn; 2131 uint8_t status; 2132 #endif 2133 // get num cmd packets - limit to 1 to reduce complexity 2134 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2135 2136 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2137 switch (opcode){ 2138 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2139 if (packet[5]) break; 2140 // terminate, name 248 chars 2141 packet[6+248] = 0; 2142 log_info("local name: %s", &packet[6]); 2143 break; 2144 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2145 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2146 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2147 uint16_t acl_len = little_endian_read_16(packet, 6); 2148 uint16_t sco_len = packet[8]; 2149 2150 // determine usable ACL/SCO payload size 2151 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2152 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2153 2154 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2155 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2156 2157 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2158 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2159 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2160 } 2161 break; 2162 case HCI_OPCODE_HCI_READ_RSSI: 2163 if (packet[5] == ERROR_CODE_SUCCESS){ 2164 uint8_t event[5]; 2165 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2166 event[1] = 3; 2167 (void)memcpy(&event[2], &packet[6], 3); 2168 hci_emit_event(event, sizeof(event), 1); 2169 } 2170 break; 2171 #ifdef ENABLE_BLE 2172 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2173 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2174 hci_stack->le_acl_packets_total_num = packet[8]; 2175 // determine usable ACL payload size 2176 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2177 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2178 } 2179 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2180 break; 2181 #endif 2182 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2183 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2184 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2185 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2186 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2187 break; 2188 #endif 2189 #ifdef ENABLE_LE_CENTRAL 2190 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2191 hci_stack->le_whitelist_capacity = packet[6]; 2192 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2193 break; 2194 #endif 2195 case HCI_OPCODE_HCI_READ_BD_ADDR: 2196 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2197 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2198 #ifdef ENABLE_CLASSIC 2199 if (hci_stack->link_key_db){ 2200 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2201 } 2202 #endif 2203 break; 2204 #ifdef ENABLE_CLASSIC 2205 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2206 hci_emit_discoverable_enabled(hci_stack->discoverable); 2207 break; 2208 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2209 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2210 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2211 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2212 hci_emit_event(event, sizeof(event), 1); 2213 } 2214 break; 2215 #endif 2216 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2217 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2218 2219 #ifdef ENABLE_CLASSIC 2220 // determine usable ACL packet types based on host buffer size and supported features 2221 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2222 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2223 #endif 2224 // Classic/LE 2225 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2226 break; 2227 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2228 manufacturer = little_endian_read_16(packet, 10); 2229 // map Cypress to Broadcom 2230 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2231 log_info("Treat Cypress as Broadcom"); 2232 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2233 little_endian_store_16(packet, 10, manufacturer); 2234 } 2235 hci_stack->manufacturer = manufacturer; 2236 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2237 break; 2238 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2239 hci_stack->local_supported_commands[0] = 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2244 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2248 hci_stack->local_supported_commands[1] = 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2250 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2251 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2252 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2253 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2254 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2255 break; 2256 #ifdef ENABLE_CLASSIC 2257 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2258 if (packet[5]) return; 2259 hci_stack->synchronous_flow_control_enabled = 1; 2260 break; 2261 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2262 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2263 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2264 conn = hci_connection_for_handle(handle); 2265 if (conn != NULL) { 2266 uint8_t key_size = 0; 2267 if (status == 0){ 2268 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2269 log_info("Handle %04x key Size: %u", handle, key_size); 2270 } else { 2271 key_size = 1; 2272 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2273 } 2274 hci_handle_read_encryption_key_size_complete(conn, key_size); 2275 } 2276 break; 2277 // assert pairing complete event is emitted. 2278 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2279 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2280 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2281 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2282 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2283 // lookup connection by gap pairing addr 2284 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2285 if (conn == NULL) break; 2286 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2287 break; 2288 2289 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2290 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2291 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2292 uint8_t event[67]; 2293 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2294 event[1] = 65; 2295 (void)memset(&event[2], 0, 65); 2296 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2297 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2298 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2299 event[2] = 3; 2300 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2301 } else { 2302 event[2] = 1; 2303 } 2304 } 2305 hci_emit_event(event, sizeof(event), 0); 2306 break; 2307 } 2308 2309 // note: only needed if user does not provide OOB data 2310 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2311 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2312 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2313 if (conn == NULL) break; 2314 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2315 break; 2316 #endif 2317 #endif 2318 default: 2319 break; 2320 } 2321 } 2322 2323 #ifdef ENABLE_BLE 2324 static void event_handle_le_connection_complete(const uint8_t * packet){ 2325 bd_addr_t addr; 2326 bd_addr_type_t addr_type; 2327 hci_connection_t * conn; 2328 2329 // Connection management 2330 reverse_bd_addr(&packet[8], addr); 2331 addr_type = (bd_addr_type_t)packet[7]; 2332 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2333 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2334 2335 #ifdef ENABLE_LE_CENTRAL 2336 // handle error: error is reported only to the initiator -> outgoing connection 2337 if (packet[3]){ 2338 2339 // handle cancelled outgoing connection 2340 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2341 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2342 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2343 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2344 // reset state 2345 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2346 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2347 // get outgoing connection conn struct for direct connect 2348 conn = gap_get_outgoing_connection(); 2349 } 2350 2351 // outgoing le connection establishment is done 2352 if (conn){ 2353 // remove entry 2354 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2355 btstack_memory_hci_connection_free( conn ); 2356 } 2357 return; 2358 } 2359 #endif 2360 2361 // on success, both hosts receive connection complete event 2362 if (packet[6] == HCI_ROLE_MASTER){ 2363 #ifdef ENABLE_LE_CENTRAL 2364 // if we're master on an le connection, it was an outgoing connection and we're done with it 2365 // note: no hci_connection_t object exists yet for connect with whitelist 2366 if (hci_is_le_connection_type(addr_type)){ 2367 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2368 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2369 } 2370 #endif 2371 } else { 2372 #ifdef ENABLE_LE_PERIPHERAL 2373 // if we're slave, it was an incoming connection, advertisements have stopped 2374 hci_stack->le_advertisements_active = false; 2375 #endif 2376 } 2377 2378 // LE connections are auto-accepted, so just create a connection if there isn't one already 2379 if (!conn){ 2380 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2381 } 2382 2383 // no memory, sorry. 2384 if (!conn){ 2385 return; 2386 } 2387 2388 conn->state = OPEN; 2389 conn->role = packet[6]; 2390 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2391 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2392 2393 #ifdef ENABLE_LE_PERIPHERAL 2394 if (packet[6] == HCI_ROLE_SLAVE){ 2395 hci_update_advertisements_enabled_for_current_roles(); 2396 } 2397 #endif 2398 2399 // init unenhanced att bearer mtu 2400 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2401 conn->att_connection.mtu_exchanged = false; 2402 2403 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2404 2405 // restart timer 2406 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2407 // btstack_run_loop_add_timer(&conn->timeout); 2408 2409 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2410 2411 hci_emit_nr_connections_changed(); 2412 } 2413 #endif 2414 2415 #ifdef ENABLE_CLASSIC 2416 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){ 2417 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2418 // LEVEL_4 is tested by l2cap 2419 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2420 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2421 if (level >= LEVEL_3){ 2422 // MITM not possible without keyboard or display 2423 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2424 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2425 2426 // MITM possible if one side has keyboard and the other has keyboard or display 2427 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2428 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2429 2430 // MITM not possible if one side has only display and other side has no keyboard 2431 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2432 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2433 } 2434 // LEVEL 2 requires SSP, which is a given 2435 return true; 2436 } 2437 2438 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2439 uint16_t i; 2440 for (i=0; i < size ; i++){ 2441 if (data[i] != 0) { 2442 return false; 2443 } 2444 } 2445 return true; 2446 } 2447 2448 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2449 // get requested security level 2450 gap_security_level_t requested_security_level = conn->requested_security_level; 2451 if (hci_stack->gap_secure_connections_only_mode){ 2452 requested_security_level = LEVEL_4; 2453 } 2454 2455 // assess security: LEVEL 4 requires SC 2456 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2457 if ((requested_security_level == LEVEL_4) && 2458 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2459 !hci_remote_sc_enabled(conn)){ 2460 log_info("Level 4 required, but SC not supported -> abort"); 2461 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2462 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2463 return; 2464 } 2465 2466 // assess security based on io capabilities 2467 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2468 // responder: fully validate io caps of both sides as well as OOB data 2469 bool security_possible = false; 2470 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2471 2472 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2473 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2474 // so we merge the OOB data availability 2475 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2476 if (conn->classic_oob_c_192 != NULL){ 2477 have_oob_data |= 1; 2478 } 2479 if (conn->classic_oob_c_256 != NULL){ 2480 have_oob_data |= 2; 2481 } 2482 // for up to Level 3, either P-192 as well as P-256 will do 2483 // if we don't support SC, then a) conn->classic_oob_c_256 will be NULL and b) remote should not report P-256 available 2484 // if remote does not SC, we should not receive P-256 data either 2485 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2486 security_possible = true; 2487 } 2488 // for Level 4, P-256 is needed 2489 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2490 security_possible = true; 2491 } 2492 #endif 2493 2494 if (security_possible == false){ 2495 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2496 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2497 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2498 return; 2499 } 2500 } else { 2501 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2502 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2503 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2504 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2505 log_info("Level 3+ required, but no input/output -> abort"); 2506 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2507 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2508 return; 2509 } 2510 #endif 2511 #endif 2512 } 2513 2514 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2515 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2516 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2517 } else { 2518 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2519 } 2520 #endif 2521 } 2522 2523 #endif 2524 2525 static void event_handler(uint8_t *packet, uint16_t size){ 2526 2527 uint16_t event_length = packet[1]; 2528 2529 // assert packet is complete 2530 if (size != (event_length + 2u)){ 2531 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2532 return; 2533 } 2534 2535 bd_addr_type_t addr_type; 2536 hci_con_handle_t handle; 2537 hci_connection_t * conn; 2538 int i; 2539 int create_connection_cmd; 2540 2541 #ifdef ENABLE_CLASSIC 2542 hci_link_type_t link_type; 2543 bd_addr_t addr; 2544 #endif 2545 2546 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2547 2548 switch (hci_event_packet_get_type(packet)) { 2549 2550 case HCI_EVENT_COMMAND_COMPLETE: 2551 handle_command_complete_event(packet, size); 2552 break; 2553 2554 case HCI_EVENT_COMMAND_STATUS: 2555 // get num cmd packets - limit to 1 to reduce complexity 2556 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2557 2558 // check command status to detected failed outgoing connections 2559 create_connection_cmd = 0; 2560 #ifdef ENABLE_CLASSIC 2561 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2562 create_connection_cmd = 1; 2563 } 2564 #endif 2565 #ifdef ENABLE_LE_CENTRAL 2566 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2567 create_connection_cmd = 1; 2568 } 2569 #endif 2570 if (create_connection_cmd) { 2571 uint8_t status = hci_event_command_status_get_status(packet); 2572 addr_type = hci_stack->outgoing_addr_type; 2573 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2574 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); 2575 2576 // reset outgoing address info 2577 memset(hci_stack->outgoing_addr, 0, 6); 2578 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2579 2580 // on error 2581 if (status != ERROR_CODE_SUCCESS){ 2582 #ifdef ENABLE_LE_CENTRAL 2583 if (hci_is_le_connection_type(addr_type)){ 2584 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2585 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2586 } 2587 #endif 2588 // error => outgoing connection failed 2589 if (conn != NULL){ 2590 hci_handle_connection_failed(conn, status); 2591 } 2592 } 2593 } 2594 2595 #ifdef ENABLE_CLASSIC 2596 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2597 uint8_t status = hci_event_command_status_get_status(packet); 2598 log_info("command status (inquiry), status %x", status); 2599 if (status == ERROR_CODE_SUCCESS) { 2600 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2601 } else { 2602 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2603 } 2604 } 2605 #endif 2606 break; 2607 2608 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2609 if (size < 3) return; 2610 uint16_t num_handles = packet[2]; 2611 if (size != (3u + num_handles * 4u)) return; 2612 uint16_t offset = 3; 2613 for (i=0; i<num_handles;i++){ 2614 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2615 offset += 2u; 2616 uint16_t num_packets = little_endian_read_16(packet, offset); 2617 offset += 2u; 2618 2619 conn = hci_connection_for_handle(handle); 2620 if (!conn){ 2621 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2622 continue; 2623 } 2624 2625 if (conn->num_packets_sent >= num_packets){ 2626 conn->num_packets_sent -= num_packets; 2627 } else { 2628 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2629 conn->num_packets_sent = 0; 2630 } 2631 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2632 2633 #ifdef ENABLE_CLASSIC 2634 // For SCO, we do the can_send_now_check here 2635 hci_notify_if_sco_can_send_now(); 2636 #endif 2637 } 2638 break; 2639 } 2640 2641 #ifdef ENABLE_CLASSIC 2642 case HCI_EVENT_INQUIRY_COMPLETE: 2643 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2644 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2645 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2646 hci_emit_event(event, sizeof(event), 1); 2647 } 2648 break; 2649 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2650 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2651 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2652 } 2653 break; 2654 case HCI_EVENT_CONNECTION_REQUEST: 2655 reverse_bd_addr(&packet[2], addr); 2656 link_type = (hci_link_type_t) packet[11]; 2657 2658 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2659 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2660 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2661 bd_addr_copy(hci_stack->decline_addr, addr); 2662 break; 2663 } 2664 2665 if (hci_stack->gap_classic_accept_callback != NULL){ 2666 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2667 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2668 bd_addr_copy(hci_stack->decline_addr, addr); 2669 break; 2670 } 2671 } 2672 2673 // TODO: eval COD 8-10 2674 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2675 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2676 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2677 if (!conn) { 2678 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2679 } 2680 if (!conn) { 2681 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2682 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2683 bd_addr_copy(hci_stack->decline_addr, addr); 2684 break; 2685 } 2686 conn->role = HCI_ROLE_SLAVE; 2687 conn->state = RECEIVED_CONNECTION_REQUEST; 2688 // store info about eSCO 2689 if (link_type == HCI_LINK_TYPE_ESCO){ 2690 conn->remote_supported_features[0] |= 1; 2691 } 2692 hci_run(); 2693 break; 2694 2695 case HCI_EVENT_CONNECTION_COMPLETE: 2696 // Connection management 2697 reverse_bd_addr(&packet[5], addr); 2698 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2699 addr_type = BD_ADDR_TYPE_ACL; 2700 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2701 if (conn) { 2702 if (!packet[2]){ 2703 conn->state = OPEN; 2704 conn->con_handle = little_endian_read_16(packet, 3); 2705 2706 // queue get remote feature 2707 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2708 2709 // queue set supervision timeout if we're master 2710 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2711 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2712 } 2713 2714 // restart timer 2715 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2716 btstack_run_loop_add_timer(&conn->timeout); 2717 2718 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2719 2720 hci_emit_nr_connections_changed(); 2721 } else { 2722 // connection failed 2723 hci_handle_connection_failed(conn, packet[2]); 2724 } 2725 } 2726 break; 2727 2728 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2729 reverse_bd_addr(&packet[5], addr); 2730 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2731 if (packet[2]){ 2732 // connection failed 2733 break; 2734 } 2735 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2736 if (!conn) { 2737 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2738 } 2739 if (!conn) { 2740 break; 2741 } 2742 conn->state = OPEN; 2743 conn->con_handle = little_endian_read_16(packet, 3); 2744 2745 #ifdef ENABLE_SCO_OVER_HCI 2746 // update SCO 2747 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2748 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2749 } 2750 // trigger can send now 2751 if (hci_have_usb_transport()){ 2752 hci_stack->sco_can_send_now = true; 2753 } 2754 #endif 2755 #ifdef HAVE_SCO_TRANSPORT 2756 // configure sco transport 2757 if (hci_stack->sco_transport != NULL){ 2758 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2759 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2760 } 2761 #endif 2762 break; 2763 2764 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2765 handle = little_endian_read_16(packet, 3); 2766 conn = hci_connection_for_handle(handle); 2767 if (!conn) break; 2768 if (!packet[2]){ 2769 const uint8_t * features = &packet[5]; 2770 hci_handle_remote_features_page_0(conn, features); 2771 2772 // read extended features if possible 2773 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2774 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2775 break; 2776 } 2777 } 2778 hci_handle_remote_features_received(conn); 2779 break; 2780 2781 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2782 handle = little_endian_read_16(packet, 3); 2783 conn = hci_connection_for_handle(handle); 2784 if (!conn) break; 2785 // status = ok, page = 1 2786 if (!packet[2]) { 2787 uint8_t page_number = packet[5]; 2788 uint8_t maximum_page_number = packet[6]; 2789 const uint8_t * features = &packet[7]; 2790 bool done = false; 2791 switch (page_number){ 2792 case 1: 2793 hci_handle_remote_features_page_1(conn, features); 2794 if (maximum_page_number >= 2){ 2795 // get Secure Connections (Controller) from Page 2 if available 2796 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2797 } else { 2798 // otherwise, assume SC (Controller) == SC (Host) 2799 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2800 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2801 } 2802 done = true; 2803 } 2804 break; 2805 case 2: 2806 hci_handle_remote_features_page_2(conn, features); 2807 done = true; 2808 break; 2809 default: 2810 break; 2811 } 2812 if (!done) break; 2813 } 2814 hci_handle_remote_features_received(conn); 2815 break; 2816 2817 case HCI_EVENT_LINK_KEY_REQUEST: 2818 // request handled by hci_run() 2819 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2820 break; 2821 2822 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2823 hci_event_link_key_request_get_bd_addr(packet, addr); 2824 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2825 if (!conn) break; 2826 2827 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2828 2829 // CVE-2020-26555: ignore NULL link key 2830 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2831 if (btstack_is_null(&packet[8], 16)) break; 2832 2833 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2834 // Change Connection Encryption keeps link key type 2835 if (link_key_type != CHANGED_COMBINATION_KEY){ 2836 conn->link_key_type = link_key_type; 2837 } 2838 2839 // cache link key. link keys stored in little-endian format for legacy reasons 2840 memcpy(&conn->link_key, &packet[8], 16); 2841 2842 // only store link key: 2843 // - if bondable enabled 2844 if (hci_stack->bondable == false) break; 2845 // - if security level sufficient 2846 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2847 // - for SSP, also check if remote side requested bonding as well 2848 if (conn->link_key_type != COMBINATION_KEY){ 2849 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2850 if (!remote_bonding){ 2851 break; 2852 } 2853 } 2854 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2855 break; 2856 } 2857 2858 case HCI_EVENT_PIN_CODE_REQUEST: 2859 hci_event_pin_code_request_get_bd_addr(packet, addr); 2860 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2861 if (!conn) break; 2862 2863 hci_pairing_started(conn, false); 2864 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2865 if (!hci_stack->bondable ){ 2866 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2867 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2868 hci_run(); 2869 return; 2870 } 2871 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2872 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2873 log_info("Level 4 required, but SC not supported -> abort"); 2874 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2875 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2876 hci_run(); 2877 return; 2878 } 2879 break; 2880 2881 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2882 hci_event_io_capability_response_get_bd_addr(packet, addr); 2883 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2884 if (!conn) break; 2885 2886 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2887 hci_pairing_started(conn, true); 2888 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2889 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2890 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2891 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2892 #endif 2893 break; 2894 2895 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2896 hci_event_io_capability_response_get_bd_addr(packet, addr); 2897 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2898 if (!conn) break; 2899 2900 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2901 hci_connection_timestamp(conn); 2902 hci_pairing_started(conn, true); 2903 break; 2904 2905 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2906 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2907 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2908 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2909 if (!conn) break; 2910 2911 hci_connection_timestamp(conn); 2912 2913 hci_pairing_started(conn, true); 2914 2915 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2916 break; 2917 #endif 2918 2919 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2920 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2921 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2922 if (!conn) break; 2923 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2924 if (hci_stack->ssp_auto_accept){ 2925 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2926 }; 2927 } else { 2928 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2929 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2930 // don't forward event to app 2931 hci_run(); 2932 return; 2933 } 2934 break; 2935 2936 case HCI_EVENT_USER_PASSKEY_REQUEST: 2937 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2938 if (hci_stack->ssp_auto_accept){ 2939 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2940 }; 2941 break; 2942 2943 case HCI_EVENT_MODE_CHANGE: 2944 handle = hci_event_mode_change_get_handle(packet); 2945 conn = hci_connection_for_handle(handle); 2946 if (!conn) break; 2947 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2948 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2949 break; 2950 #endif 2951 2952 case HCI_EVENT_ENCRYPTION_CHANGE: 2953 handle = hci_event_encryption_change_get_connection_handle(packet); 2954 conn = hci_connection_for_handle(handle); 2955 if (!conn) break; 2956 if (hci_event_encryption_change_get_status(packet) == 0u) { 2957 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2958 if (encryption_enabled){ 2959 if (hci_is_le_connection(conn)){ 2960 // For LE, we accept connection as encrypted 2961 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2962 } 2963 #ifdef ENABLE_CLASSIC 2964 else { 2965 2966 // dedicated bonding: send result and disconnect 2967 if (conn->bonding_flags & BONDING_DEDICATED){ 2968 conn->bonding_flags &= ~BONDING_DEDICATED; 2969 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2970 conn->bonding_status = packet[2]; 2971 break; 2972 } 2973 2974 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2975 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2976 bool connected_uses_aes_ccm = encryption_enabled == 2; 2977 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2978 log_info("SC during pairing, but only E0 now -> abort"); 2979 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2980 break; 2981 } 2982 2983 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2984 if (connected_uses_aes_ccm){ 2985 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2986 } 2987 2988 #ifdef ENABLE_TESTING_SUPPORT 2989 // work around for issue with PTS dongle 2990 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2991 #endif 2992 2993 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2994 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2995 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2996 } else { 2997 // if not, pretend everything is perfect 2998 hci_handle_read_encryption_key_size_complete(conn, 16); 2999 } 3000 } 3001 #endif 3002 } else { 3003 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3004 } 3005 } 3006 3007 break; 3008 3009 #ifdef ENABLE_CLASSIC 3010 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3011 handle = hci_event_authentication_complete_get_connection_handle(packet); 3012 conn = hci_connection_for_handle(handle); 3013 if (!conn) break; 3014 3015 // clear authentication active flag 3016 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3017 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3018 3019 // authenticated only if auth status == 0 3020 if (hci_event_authentication_complete_get_status(packet) == 0){ 3021 // authenticated 3022 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3023 3024 // If not already encrypted, start encryption 3025 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3026 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3027 break; 3028 } 3029 } 3030 3031 // emit updated security level 3032 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3033 break; 3034 3035 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3036 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3037 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3038 if (!conn) break; 3039 3040 // treat successfully paired connection as authenticated 3041 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3042 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3043 } 3044 3045 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3046 break; 3047 #endif 3048 3049 // HCI_EVENT_DISCONNECTION_COMPLETE 3050 // has been split, to first notify stack before shutting connection down 3051 // see end of function, too. 3052 case HCI_EVENT_DISCONNECTION_COMPLETE: 3053 if (packet[2]) break; // status != 0 3054 handle = little_endian_read_16(packet, 3); 3055 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3056 if (hci_stack->acl_fragmentation_total_size > 0u) { 3057 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3058 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3059 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3060 hci_stack->acl_fragmentation_total_size = 0; 3061 hci_stack->acl_fragmentation_pos = 0; 3062 if (release_buffer){ 3063 hci_release_packet_buffer(); 3064 } 3065 } 3066 } 3067 3068 conn = hci_connection_for_handle(handle); 3069 if (!conn) break; 3070 #ifdef ENABLE_CLASSIC 3071 // pairing failed if it was ongoing 3072 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3073 #endif 3074 3075 // emit dedicatd bonding event 3076 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3077 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3078 } 3079 3080 // mark connection for shutdown, stop timers, reset state 3081 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3082 hci_connection_stop_timer(conn); 3083 hci_connection_init(conn); 3084 3085 #ifdef ENABLE_BLE 3086 #ifdef ENABLE_LE_PERIPHERAL 3087 // re-enable advertisements for le connections if active 3088 if (hci_is_le_connection(conn)){ 3089 hci_update_advertisements_enabled_for_current_roles(); 3090 } 3091 #endif 3092 #endif 3093 break; 3094 3095 case HCI_EVENT_HARDWARE_ERROR: 3096 log_error("Hardware Error: 0x%02x", packet[2]); 3097 if (hci_stack->hardware_error_callback){ 3098 (*hci_stack->hardware_error_callback)(packet[2]); 3099 } else { 3100 // if no special requests, just reboot stack 3101 hci_power_control_off(); 3102 hci_power_control_on(); 3103 } 3104 break; 3105 3106 #ifdef ENABLE_CLASSIC 3107 case HCI_EVENT_ROLE_CHANGE: 3108 if (packet[2]) break; // status != 0 3109 reverse_bd_addr(&packet[3], addr); 3110 addr_type = BD_ADDR_TYPE_ACL; 3111 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3112 if (!conn) break; 3113 conn->role = packet[9]; 3114 break; 3115 #endif 3116 3117 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3118 // release packet buffer only for asynchronous transport and if there are not further fragements 3119 if (hci_transport_synchronous()) { 3120 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3121 return; // instead of break: to avoid re-entering hci_run() 3122 } 3123 hci_stack->acl_fragmentation_tx_active = 0; 3124 if (hci_stack->acl_fragmentation_total_size) break; 3125 hci_release_packet_buffer(); 3126 3127 // L2CAP receives this event via the hci_emit_event below 3128 3129 #ifdef ENABLE_CLASSIC 3130 // For SCO, we do the can_send_now_check here 3131 hci_notify_if_sco_can_send_now(); 3132 #endif 3133 break; 3134 3135 #ifdef ENABLE_CLASSIC 3136 case HCI_EVENT_SCO_CAN_SEND_NOW: 3137 // For SCO, we do the can_send_now_check here 3138 hci_stack->sco_can_send_now = true; 3139 hci_notify_if_sco_can_send_now(); 3140 return; 3141 3142 // explode inquriy results for easier consumption 3143 case HCI_EVENT_INQUIRY_RESULT: 3144 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3145 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3146 gap_inquiry_explode(packet, size); 3147 break; 3148 #endif 3149 3150 #ifdef ENABLE_BLE 3151 case HCI_EVENT_LE_META: 3152 switch (packet[2]){ 3153 #ifdef ENABLE_LE_CENTRAL 3154 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3155 // log_info("advertising report received"); 3156 if (!hci_stack->le_scanning_enabled) break; 3157 le_handle_advertisement_report(packet, size); 3158 break; 3159 #endif 3160 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3161 event_handle_le_connection_complete(packet); 3162 break; 3163 3164 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3165 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3166 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3167 conn = hci_connection_for_handle(handle); 3168 if (!conn) break; 3169 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3170 break; 3171 3172 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3173 // connection 3174 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3175 conn = hci_connection_for_handle(handle); 3176 if (conn) { 3177 // read arguments 3178 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3179 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3180 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3181 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3182 3183 // validate against current connection parameter range 3184 le_connection_parameter_range_t existing_range; 3185 gap_get_connection_parameter_range(&existing_range); 3186 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3187 if (update_parameter){ 3188 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3189 conn->le_conn_interval_min = le_conn_interval_min; 3190 conn->le_conn_interval_max = le_conn_interval_max; 3191 conn->le_conn_latency = le_conn_latency; 3192 conn->le_supervision_timeout = le_supervision_timeout; 3193 } else { 3194 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3195 } 3196 } 3197 break; 3198 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3199 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3200 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3201 conn = hci_connection_for_handle(handle); 3202 if (conn) { 3203 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3204 } 3205 break; 3206 #endif 3207 default: 3208 break; 3209 } 3210 break; 3211 #endif 3212 case HCI_EVENT_VENDOR_SPECIFIC: 3213 // Vendor specific commands often create vendor specific event instead of num completed packets 3214 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3215 switch (hci_stack->manufacturer){ 3216 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3217 hci_stack->num_cmd_packets = 1; 3218 break; 3219 default: 3220 break; 3221 } 3222 break; 3223 default: 3224 break; 3225 } 3226 3227 handle_event_for_current_stack_state(packet, size); 3228 3229 // notify upper stack 3230 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3231 3232 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3233 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3234 handle = little_endian_read_16(packet, 3); 3235 hci_connection_t * aConn = hci_connection_for_handle(handle); 3236 // discard connection if app did not trigger a reconnect in the event handler 3237 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3238 hci_shutdown_connection(aConn); 3239 } 3240 } 3241 3242 // execute main loop 3243 hci_run(); 3244 } 3245 3246 #ifdef ENABLE_CLASSIC 3247 3248 #ifdef ENABLE_SCO_OVER_HCI 3249 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3250 static void sco_schedule_tx(hci_connection_t * conn); 3251 3252 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3253 log_debug("SCO TX Timeout"); 3254 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3255 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3256 if (!conn) return; 3257 3258 // trigger send 3259 conn->sco_tx_ready = 1; 3260 // extra packet if CVSD but SCO buffer is too short 3261 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3262 conn->sco_tx_ready++; 3263 } 3264 hci_notify_if_sco_can_send_now(); 3265 } 3266 3267 3268 #define SCO_TX_AFTER_RX_MS (6) 3269 3270 static void sco_schedule_tx(hci_connection_t * conn){ 3271 3272 uint32_t now = btstack_run_loop_get_time_ms(); 3273 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3274 int time_delta_ms = sco_tx_ms - now; 3275 3276 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3277 3278 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3279 btstack_run_loop_remove_timer(timer); 3280 btstack_run_loop_set_timer(timer, time_delta_ms); 3281 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3282 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3283 btstack_run_loop_add_timer(timer); 3284 } 3285 #endif 3286 3287 static void sco_handler(uint8_t * packet, uint16_t size){ 3288 // lookup connection struct 3289 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3290 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3291 if (!conn) return; 3292 3293 #ifdef ENABLE_SCO_OVER_HCI 3294 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3295 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3296 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3297 packet[2] = 0x3c; 3298 memmove(&packet[3], &packet[23], 63); 3299 size = 63; 3300 } 3301 } 3302 3303 if (hci_have_usb_transport()){ 3304 // Nothing to do 3305 } else { 3306 // 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); 3307 if (hci_stack->synchronous_flow_control_enabled == 0){ 3308 uint32_t now = btstack_run_loop_get_time_ms(); 3309 3310 if (!conn->sco_rx_valid){ 3311 // ignore first 10 packets 3312 conn->sco_rx_count++; 3313 // log_debug("sco rx count %u", conn->sco_rx_count); 3314 if (conn->sco_rx_count == 10) { 3315 // use first timestamp as is and pretent it just started 3316 conn->sco_rx_ms = now; 3317 conn->sco_rx_valid = 1; 3318 conn->sco_rx_count = 0; 3319 sco_schedule_tx(conn); 3320 } 3321 } else { 3322 // track expected arrival timme 3323 conn->sco_rx_count++; 3324 conn->sco_rx_ms += 7; 3325 int delta = (int32_t) (now - conn->sco_rx_ms); 3326 if (delta > 0){ 3327 conn->sco_rx_ms++; 3328 } 3329 // log_debug("sco rx %u", conn->sco_rx_ms); 3330 sco_schedule_tx(conn); 3331 } 3332 } 3333 } 3334 #endif 3335 3336 // deliver to app 3337 if (hci_stack->sco_packet_handler) { 3338 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3339 } 3340 3341 #ifdef HAVE_SCO_TRANSPORT 3342 // We can send one packet for each received packet 3343 conn->sco_tx_ready++; 3344 hci_notify_if_sco_can_send_now(); 3345 #endif 3346 3347 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3348 conn->num_packets_completed++; 3349 hci_stack->host_completed_packets = 1; 3350 hci_run(); 3351 #endif 3352 } 3353 #endif 3354 3355 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3356 hci_dump_packet(packet_type, 1, packet, size); 3357 switch (packet_type) { 3358 case HCI_EVENT_PACKET: 3359 event_handler(packet, size); 3360 break; 3361 case HCI_ACL_DATA_PACKET: 3362 acl_handler(packet, size); 3363 break; 3364 #ifdef ENABLE_CLASSIC 3365 case HCI_SCO_DATA_PACKET: 3366 sco_handler(packet, size); 3367 break; 3368 #endif 3369 default: 3370 break; 3371 } 3372 } 3373 3374 /** 3375 * @brief Add event packet handler. 3376 */ 3377 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3378 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3379 } 3380 3381 3382 /** Register HCI packet handlers */ 3383 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3384 hci_stack->acl_packet_handler = handler; 3385 } 3386 3387 #ifdef ENABLE_CLASSIC 3388 /** 3389 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3390 */ 3391 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3392 hci_stack->sco_packet_handler = handler; 3393 } 3394 #endif 3395 3396 static void hci_state_reset(void){ 3397 // no connections yet 3398 hci_stack->connections = NULL; 3399 3400 // keep discoverable/connectable as this has been requested by the client(s) 3401 // hci_stack->discoverable = 0; 3402 // hci_stack->connectable = 0; 3403 // hci_stack->bondable = 1; 3404 // hci_stack->own_addr_type = 0; 3405 3406 // buffer is free 3407 hci_stack->hci_packet_buffer_reserved = false; 3408 3409 // no pending cmds 3410 hci_stack->decline_reason = 0; 3411 hci_stack->new_scan_enable_value = 0xff; 3412 3413 hci_stack->secure_connections_active = false; 3414 3415 #ifdef ENABLE_CLASSIC 3416 hci_stack->new_page_scan_interval = 0xffff; 3417 hci_stack->new_page_scan_window = 0xffff; 3418 hci_stack->new_page_scan_type = 0xff; 3419 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3420 hci_stack->gap_tasks = 3421 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3422 GAP_TASK_SET_CLASS_OF_DEVICE | 3423 GAP_TASK_SET_LOCAL_NAME | 3424 GAP_TASK_SET_EIR_DATA; 3425 #endif 3426 3427 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3428 hci_stack->classic_read_local_oob_data = true; 3429 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3430 #endif 3431 3432 // LE 3433 #ifdef ENABLE_BLE 3434 memset(hci_stack->le_random_address, 0, 6); 3435 hci_stack->le_random_address_set = 0; 3436 #endif 3437 #ifdef ENABLE_LE_CENTRAL 3438 hci_stack->le_scanning_active = false; 3439 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3440 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3441 hci_stack->le_whitelist_capacity = 0; 3442 #endif 3443 #ifdef ENABLE_LE_PERIPHERAL 3444 hci_stack->le_advertisements_active = false; 3445 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3446 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3447 } 3448 if (hci_stack->le_advertisements_data != NULL){ 3449 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3450 } 3451 #endif 3452 } 3453 3454 #ifdef ENABLE_CLASSIC 3455 /** 3456 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3457 */ 3458 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3459 // store and open remote device db 3460 hci_stack->link_key_db = link_key_db; 3461 if (hci_stack->link_key_db) { 3462 hci_stack->link_key_db->open(); 3463 } 3464 } 3465 #endif 3466 3467 void hci_init(const hci_transport_t *transport, const void *config){ 3468 3469 #ifdef HAVE_MALLOC 3470 if (!hci_stack) { 3471 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3472 } 3473 #else 3474 hci_stack = &hci_stack_static; 3475 #endif 3476 memset(hci_stack, 0, sizeof(hci_stack_t)); 3477 3478 // reference to use transport layer implementation 3479 hci_stack->hci_transport = transport; 3480 3481 // reference to used config 3482 hci_stack->config = config; 3483 3484 // setup pointer for outgoing packet buffer 3485 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3486 3487 // max acl payload size defined in config.h 3488 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3489 3490 // register packet handlers with transport 3491 transport->register_packet_handler(&packet_handler); 3492 3493 hci_stack->state = HCI_STATE_OFF; 3494 3495 // class of device 3496 hci_stack->class_of_device = 0x007a020c; // Smartphone 3497 3498 // bondable by default 3499 hci_stack->bondable = 1; 3500 3501 #ifdef ENABLE_CLASSIC 3502 // classic name 3503 hci_stack->local_name = default_classic_name; 3504 3505 // Master slave policy 3506 hci_stack->master_slave_policy = 1; 3507 3508 // Allow Role Switch 3509 hci_stack->allow_role_switch = 1; 3510 3511 // Default / minimum security level = 2 3512 hci_stack->gap_security_level = LEVEL_2; 3513 3514 // Default Security Mode 4 3515 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3516 3517 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3518 hci_stack->gap_required_encyrption_key_size = 7; 3519 3520 // Link Supervision Timeout 3521 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3522 3523 #endif 3524 3525 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3526 hci_stack->ssp_enable = 1; 3527 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3528 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3529 hci_stack->ssp_auto_accept = 1; 3530 3531 // Secure Connections: enable (requires support from Controller) 3532 hci_stack->secure_connections_enable = true; 3533 3534 // voice setting - signed 16 bit pcm data with CVSD over the air 3535 hci_stack->sco_voice_setting = 0x60; 3536 3537 #ifdef ENABLE_LE_CENTRAL 3538 // connection parameter to use for outgoing connections 3539 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3540 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3541 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3542 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3543 hci_stack->le_connection_latency = 4; // 4 3544 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3545 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3546 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3547 3548 // default LE Scanning 3549 hci_stack->le_scan_type = 0x1; // active 3550 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3551 hci_stack->le_scan_window = 0x30; // 30 ms 3552 #endif 3553 3554 #ifdef ENABLE_LE_PERIPHERAL 3555 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3556 #endif 3557 3558 // connection parameter range used to answer connection parameter update requests in l2cap 3559 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3560 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3561 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3562 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3563 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3564 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3565 3566 hci_state_reset(); 3567 } 3568 3569 void hci_deinit(void){ 3570 #ifdef HAVE_MALLOC 3571 if (hci_stack) { 3572 free(hci_stack); 3573 } 3574 #endif 3575 hci_stack = NULL; 3576 3577 #ifdef ENABLE_CLASSIC 3578 disable_l2cap_timeouts = 0; 3579 #endif 3580 } 3581 3582 /** 3583 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3584 */ 3585 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3586 hci_stack->chipset = chipset_driver; 3587 3588 // reset chipset driver - init is also called on power_up 3589 if (hci_stack->chipset && hci_stack->chipset->init){ 3590 hci_stack->chipset->init(hci_stack->config); 3591 } 3592 } 3593 3594 /** 3595 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3596 */ 3597 void hci_set_control(const btstack_control_t *hardware_control){ 3598 // references to used control implementation 3599 hci_stack->control = hardware_control; 3600 // init with transport config 3601 hardware_control->init(hci_stack->config); 3602 } 3603 3604 void hci_close(void){ 3605 3606 #ifdef ENABLE_CLASSIC 3607 // close remote device db 3608 if (hci_stack->link_key_db) { 3609 hci_stack->link_key_db->close(); 3610 } 3611 #endif 3612 3613 btstack_linked_list_iterator_t lit; 3614 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3615 while (btstack_linked_list_iterator_has_next(&lit)){ 3616 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3617 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3618 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3619 hci_shutdown_connection(connection); 3620 } 3621 3622 hci_power_control(HCI_POWER_OFF); 3623 3624 #ifdef HAVE_MALLOC 3625 free(hci_stack); 3626 #endif 3627 hci_stack = NULL; 3628 } 3629 3630 #ifdef HAVE_SCO_TRANSPORT 3631 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3632 hci_stack->sco_transport = sco_transport; 3633 sco_transport->register_packet_handler(&packet_handler); 3634 } 3635 #endif 3636 3637 #ifdef ENABLE_CLASSIC 3638 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3639 // validate ranage and set 3640 if (encryption_key_size < 7) return; 3641 if (encryption_key_size > 16) return; 3642 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3643 } 3644 3645 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3646 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3647 hci_stack->gap_security_mode = security_mode; 3648 return ERROR_CODE_SUCCESS; 3649 } else { 3650 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3651 } 3652 } 3653 3654 gap_security_mode_t gap_get_security_mode(void){ 3655 return hci_stack->gap_security_mode; 3656 } 3657 3658 void gap_set_security_level(gap_security_level_t security_level){ 3659 hci_stack->gap_security_level = security_level; 3660 } 3661 3662 gap_security_level_t gap_get_security_level(void){ 3663 if (hci_stack->gap_secure_connections_only_mode){ 3664 return LEVEL_4; 3665 } 3666 return hci_stack->gap_security_level; 3667 } 3668 3669 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3670 hci_stack->gap_minimal_service_security_level = security_level; 3671 } 3672 3673 void gap_set_secure_connections_only_mode(bool enable){ 3674 hci_stack->gap_secure_connections_only_mode = enable; 3675 } 3676 3677 bool gap_get_secure_connections_only_mode(void){ 3678 return hci_stack->gap_secure_connections_only_mode; 3679 } 3680 #endif 3681 3682 #ifdef ENABLE_CLASSIC 3683 void gap_set_class_of_device(uint32_t class_of_device){ 3684 hci_stack->class_of_device = class_of_device; 3685 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3686 hci_run(); 3687 } 3688 3689 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3690 hci_stack->default_link_policy_settings = default_link_policy_settings; 3691 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3692 hci_run(); 3693 } 3694 3695 void gap_set_allow_role_switch(bool allow_role_switch){ 3696 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3697 } 3698 3699 uint8_t hci_get_allow_role_switch(void){ 3700 return hci_stack->allow_role_switch; 3701 } 3702 3703 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3704 hci_stack->link_supervision_timeout = link_supervision_timeout; 3705 } 3706 3707 void hci_disable_l2cap_timeout_check(void){ 3708 disable_l2cap_timeouts = 1; 3709 } 3710 #endif 3711 3712 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3713 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3714 void hci_set_bd_addr(bd_addr_t addr){ 3715 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3716 hci_stack->custom_bd_addr_set = 1; 3717 } 3718 #endif 3719 3720 // State-Module-Driver overview 3721 // state module low-level 3722 // HCI_STATE_OFF off close 3723 // HCI_STATE_INITIALIZING, on open 3724 // HCI_STATE_WORKING, on open 3725 // HCI_STATE_HALTING, on open 3726 // HCI_STATE_SLEEPING, off/sleep close 3727 // HCI_STATE_FALLING_ASLEEP on open 3728 3729 static int hci_power_control_on(void){ 3730 3731 // power on 3732 int err = 0; 3733 if (hci_stack->control && hci_stack->control->on){ 3734 err = (*hci_stack->control->on)(); 3735 } 3736 if (err){ 3737 log_error( "POWER_ON failed"); 3738 hci_emit_hci_open_failed(); 3739 return err; 3740 } 3741 3742 // int chipset driver 3743 if (hci_stack->chipset && hci_stack->chipset->init){ 3744 hci_stack->chipset->init(hci_stack->config); 3745 } 3746 3747 // init transport 3748 if (hci_stack->hci_transport->init){ 3749 hci_stack->hci_transport->init(hci_stack->config); 3750 } 3751 3752 // open transport 3753 err = hci_stack->hci_transport->open(); 3754 if (err){ 3755 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3756 if (hci_stack->control && hci_stack->control->off){ 3757 (*hci_stack->control->off)(); 3758 } 3759 hci_emit_hci_open_failed(); 3760 return err; 3761 } 3762 return 0; 3763 } 3764 3765 static void hci_power_control_off(void){ 3766 3767 log_info("hci_power_control_off"); 3768 3769 // close low-level device 3770 hci_stack->hci_transport->close(); 3771 3772 log_info("hci_power_control_off - hci_transport closed"); 3773 3774 // power off 3775 if (hci_stack->control && hci_stack->control->off){ 3776 (*hci_stack->control->off)(); 3777 } 3778 3779 log_info("hci_power_control_off - control closed"); 3780 3781 hci_stack->state = HCI_STATE_OFF; 3782 } 3783 3784 static void hci_power_control_sleep(void){ 3785 3786 log_info("hci_power_control_sleep"); 3787 3788 #if 0 3789 // don't close serial port during sleep 3790 3791 // close low-level device 3792 hci_stack->hci_transport->close(hci_stack->config); 3793 #endif 3794 3795 // sleep mode 3796 if (hci_stack->control && hci_stack->control->sleep){ 3797 (*hci_stack->control->sleep)(); 3798 } 3799 3800 hci_stack->state = HCI_STATE_SLEEPING; 3801 } 3802 3803 static int hci_power_control_wake(void){ 3804 3805 log_info("hci_power_control_wake"); 3806 3807 // wake on 3808 if (hci_stack->control && hci_stack->control->wake){ 3809 (*hci_stack->control->wake)(); 3810 } 3811 3812 #if 0 3813 // open low-level device 3814 int err = hci_stack->hci_transport->open(hci_stack->config); 3815 if (err){ 3816 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3817 if (hci_stack->control && hci_stack->control->off){ 3818 (*hci_stack->control->off)(); 3819 } 3820 hci_emit_hci_open_failed(); 3821 return err; 3822 } 3823 #endif 3824 3825 return 0; 3826 } 3827 3828 static void hci_power_transition_to_initializing(void){ 3829 // set up state machine 3830 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3831 hci_stack->hci_packet_buffer_reserved = false; 3832 hci_stack->state = HCI_STATE_INITIALIZING; 3833 hci_stack->substate = HCI_INIT_SEND_RESET; 3834 } 3835 3836 // returns error 3837 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3838 int err; 3839 switch (power_mode){ 3840 case HCI_POWER_ON: 3841 err = hci_power_control_on(); 3842 if (err != 0) { 3843 log_error("hci_power_control_on() error %d", err); 3844 return err; 3845 } 3846 hci_power_transition_to_initializing(); 3847 break; 3848 case HCI_POWER_OFF: 3849 // do nothing 3850 break; 3851 case HCI_POWER_SLEEP: 3852 // do nothing (with SLEEP == OFF) 3853 break; 3854 default: 3855 btstack_assert(false); 3856 break; 3857 } 3858 return ERROR_CODE_SUCCESS; 3859 } 3860 3861 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3862 switch (power_mode){ 3863 case HCI_POWER_ON: 3864 // do nothing 3865 break; 3866 case HCI_POWER_OFF: 3867 // no connections yet, just turn it off 3868 hci_power_control_off(); 3869 break; 3870 case HCI_POWER_SLEEP: 3871 // no connections yet, just turn it off 3872 hci_power_control_sleep(); 3873 break; 3874 default: 3875 btstack_assert(false); 3876 break; 3877 } 3878 return ERROR_CODE_SUCCESS; 3879 } 3880 3881 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3882 switch (power_mode){ 3883 case HCI_POWER_ON: 3884 // do nothing 3885 break; 3886 case HCI_POWER_OFF: 3887 // see hci_run 3888 hci_stack->state = HCI_STATE_HALTING; 3889 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3890 break; 3891 case HCI_POWER_SLEEP: 3892 // see hci_run 3893 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3894 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3895 break; 3896 default: 3897 btstack_assert(false); 3898 break; 3899 } 3900 return ERROR_CODE_SUCCESS; 3901 } 3902 3903 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3904 switch (power_mode){ 3905 case HCI_POWER_ON: 3906 hci_power_transition_to_initializing(); 3907 break; 3908 case HCI_POWER_OFF: 3909 // do nothing 3910 break; 3911 case HCI_POWER_SLEEP: 3912 // see hci_run 3913 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3914 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3915 break; 3916 default: 3917 btstack_assert(false); 3918 break; 3919 } 3920 return ERROR_CODE_SUCCESS; 3921 } 3922 3923 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3924 switch (power_mode){ 3925 case HCI_POWER_ON: 3926 3927 #ifdef HAVE_PLATFORM_IPHONE_OS 3928 // nothing to do, if H4 supports power management 3929 if (btstack_control_iphone_power_management_enabled()){ 3930 hci_stack->state = HCI_STATE_INITIALIZING; 3931 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3932 break; 3933 } 3934 #endif 3935 hci_power_transition_to_initializing(); 3936 break; 3937 case HCI_POWER_OFF: 3938 // see hci_run 3939 hci_stack->state = HCI_STATE_HALTING; 3940 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3941 break; 3942 case HCI_POWER_SLEEP: 3943 // do nothing 3944 break; 3945 default: 3946 btstack_assert(false); 3947 break; 3948 } 3949 return ERROR_CODE_SUCCESS; 3950 } 3951 3952 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3953 int err; 3954 switch (power_mode){ 3955 case HCI_POWER_ON: 3956 #ifdef HAVE_PLATFORM_IPHONE_OS 3957 // nothing to do, if H4 supports power management 3958 if (btstack_control_iphone_power_management_enabled()){ 3959 hci_stack->state = HCI_STATE_INITIALIZING; 3960 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3961 hci_update_scan_enable(); 3962 break; 3963 } 3964 #endif 3965 err = hci_power_control_wake(); 3966 if (err) return err; 3967 hci_power_transition_to_initializing(); 3968 break; 3969 case HCI_POWER_OFF: 3970 hci_stack->state = HCI_STATE_HALTING; 3971 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3972 break; 3973 case HCI_POWER_SLEEP: 3974 // do nothing 3975 break; 3976 default: 3977 btstack_assert(false); 3978 break; 3979 } 3980 return ERROR_CODE_SUCCESS; 3981 } 3982 3983 int hci_power_control(HCI_POWER_MODE power_mode){ 3984 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3985 int err = 0; 3986 switch (hci_stack->state){ 3987 case HCI_STATE_OFF: 3988 err = hci_power_control_state_off(power_mode); 3989 break; 3990 case HCI_STATE_INITIALIZING: 3991 err = hci_power_control_state_initializing(power_mode); 3992 break; 3993 case HCI_STATE_WORKING: 3994 err = hci_power_control_state_working(power_mode); 3995 break; 3996 case HCI_STATE_HALTING: 3997 err = hci_power_control_state_halting(power_mode); 3998 break; 3999 case HCI_STATE_FALLING_ASLEEP: 4000 err = hci_power_control_state_falling_asleep(power_mode); 4001 break; 4002 case HCI_STATE_SLEEPING: 4003 err = hci_power_control_state_sleeping(power_mode); 4004 break; 4005 default: 4006 btstack_assert(false); 4007 break; 4008 } 4009 if (err != 0){ 4010 return err; 4011 } 4012 4013 // create internal event 4014 hci_emit_state(); 4015 4016 // trigger next/first action 4017 hci_run(); 4018 4019 return 0; 4020 } 4021 4022 4023 #ifdef ENABLE_CLASSIC 4024 4025 static void hci_update_scan_enable(void){ 4026 // 2 = page scan, 1 = inq scan 4027 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4028 hci_run(); 4029 } 4030 4031 void gap_discoverable_control(uint8_t enable){ 4032 if (enable) enable = 1; // normalize argument 4033 4034 if (hci_stack->discoverable == enable){ 4035 hci_emit_discoverable_enabled(hci_stack->discoverable); 4036 return; 4037 } 4038 4039 hci_stack->discoverable = enable; 4040 hci_update_scan_enable(); 4041 } 4042 4043 void gap_connectable_control(uint8_t enable){ 4044 if (enable) enable = 1; // normalize argument 4045 4046 // don't emit event 4047 if (hci_stack->connectable == enable) return; 4048 4049 hci_stack->connectable = enable; 4050 hci_update_scan_enable(); 4051 } 4052 #endif 4053 4054 void gap_local_bd_addr(bd_addr_t address_buffer){ 4055 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4056 } 4057 4058 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4059 static void hci_host_num_completed_packets(void){ 4060 4061 // create packet manually as arrays are not supported and num_commands should not get reduced 4062 hci_reserve_packet_buffer(); 4063 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4064 4065 uint16_t size = 0; 4066 uint16_t num_handles = 0; 4067 packet[size++] = 0x35; 4068 packet[size++] = 0x0c; 4069 size++; // skip param len 4070 size++; // skip num handles 4071 4072 // add { handle, packets } entries 4073 btstack_linked_item_t * it; 4074 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4075 hci_connection_t * connection = (hci_connection_t *) it; 4076 if (connection->num_packets_completed){ 4077 little_endian_store_16(packet, size, connection->con_handle); 4078 size += 2; 4079 little_endian_store_16(packet, size, connection->num_packets_completed); 4080 size += 2; 4081 // 4082 num_handles++; 4083 connection->num_packets_completed = 0; 4084 } 4085 } 4086 4087 packet[2] = size - 3; 4088 packet[3] = num_handles; 4089 4090 hci_stack->host_completed_packets = 0; 4091 4092 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4093 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4094 4095 // release packet buffer for synchronous transport implementations 4096 if (hci_transport_synchronous()){ 4097 hci_release_packet_buffer(); 4098 hci_emit_transport_packet_sent(); 4099 } 4100 } 4101 #endif 4102 4103 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4104 UNUSED(ds); 4105 hci_stack->substate = HCI_HALTING_CLOSE; 4106 // allow packet handlers to defer final shutdown 4107 hci_emit_state(); 4108 hci_run(); 4109 } 4110 4111 static bool hci_run_acl_fragments(void){ 4112 if (hci_stack->acl_fragmentation_total_size > 0u) { 4113 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4114 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4115 if (connection) { 4116 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4117 hci_send_acl_packet_fragments(connection); 4118 return true; 4119 } 4120 } else { 4121 // connection gone -> discard further fragments 4122 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4123 hci_stack->acl_fragmentation_total_size = 0; 4124 hci_stack->acl_fragmentation_pos = 0; 4125 } 4126 } 4127 return false; 4128 } 4129 4130 #ifdef ENABLE_CLASSIC 4131 static bool hci_run_general_gap_classic(void){ 4132 4133 // assert stack is working and classic is active 4134 if (hci_classic_supported() == false) return false; 4135 if (hci_stack->state != HCI_STATE_WORKING) return false; 4136 4137 // decline incoming connections 4138 if (hci_stack->decline_reason){ 4139 uint8_t reason = hci_stack->decline_reason; 4140 hci_stack->decline_reason = 0; 4141 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4142 return true; 4143 } 4144 4145 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4146 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4147 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4148 return true; 4149 } 4150 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4151 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4152 gap_run_set_local_name(); 4153 return true; 4154 } 4155 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4156 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4157 gap_run_set_eir_data(); 4158 return true; 4159 } 4160 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4161 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4162 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4163 return true; 4164 } 4165 // write page scan activity 4166 if (hci_stack->new_page_scan_interval != 0xffff) { 4167 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4168 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4169 hci_stack->new_page_scan_interval = 0xffff; 4170 hci_stack->new_page_scan_window = 0xffff; 4171 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4172 return true; 4173 } 4174 // write page scan type 4175 if (hci_stack->new_page_scan_type != 0xff) { 4176 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4177 hci_stack->new_page_scan_type = 0xff; 4178 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4179 return true; 4180 } 4181 // send scan enable 4182 if (hci_stack->new_scan_enable_value != 0xff) { 4183 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4184 hci_stack->new_scan_enable_value = 0xff; 4185 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4186 return true; 4187 } 4188 4189 // start/stop inquiry 4190 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4191 uint8_t duration = hci_stack->inquiry_state; 4192 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4193 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4194 return true; 4195 } 4196 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4197 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4198 hci_send_cmd(&hci_inquiry_cancel); 4199 return true; 4200 } 4201 // remote name request 4202 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4203 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4204 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4205 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4206 return true; 4207 } 4208 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4209 // Local OOB data 4210 if (hci_stack->classic_read_local_oob_data){ 4211 hci_stack->classic_read_local_oob_data = false; 4212 if (hci_stack->local_supported_commands[1] & 0x10u){ 4213 hci_send_cmd(&hci_read_local_extended_oob_data); 4214 } else { 4215 hci_send_cmd(&hci_read_local_oob_data); 4216 } 4217 } 4218 #endif 4219 // pairing 4220 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4221 uint8_t state = hci_stack->gap_pairing_state; 4222 uint8_t pin_code[16]; 4223 switch (state){ 4224 case GAP_PAIRING_STATE_SEND_PIN: 4225 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4226 memset(pin_code, 0, 16); 4227 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4228 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4229 break; 4230 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4231 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4232 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4233 break; 4234 case GAP_PAIRING_STATE_SEND_PASSKEY: 4235 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4236 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4237 break; 4238 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4239 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4240 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4241 break; 4242 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4243 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4244 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4245 break; 4246 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4247 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4248 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4249 break; 4250 default: 4251 break; 4252 } 4253 return true; 4254 } 4255 return false; 4256 } 4257 #endif 4258 4259 #ifdef ENABLE_BLE 4260 static bool hci_run_general_gap_le(void){ 4261 4262 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4263 4264 if (hci_stack->state != HCI_STATE_WORKING) return false; 4265 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4266 4267 4268 // Phase 1: collect what to stop 4269 4270 bool scanning_stop = false; 4271 bool connecting_stop = false; 4272 bool advertising_stop = false; 4273 4274 #ifndef ENABLE_LE_CENTRAL 4275 UNUSED(scanning_stop); 4276 UNUSED(connecting_stop); 4277 #endif 4278 #ifndef ENABLE_LE_PERIPHERAL 4279 UNUSED(advertising_stop); 4280 #endif 4281 4282 // check if whitelist needs modification 4283 bool whitelist_modification_pending = false; 4284 btstack_linked_list_iterator_t lit; 4285 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4286 while (btstack_linked_list_iterator_has_next(&lit)){ 4287 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4288 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4289 whitelist_modification_pending = true; 4290 break; 4291 } 4292 } 4293 // check if resolving list needs modification 4294 bool resolving_list_modification_pending = false; 4295 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4296 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4297 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4298 resolving_list_modification_pending = true; 4299 } 4300 #endif 4301 4302 #ifdef ENABLE_LE_CENTRAL 4303 // scanning control 4304 if (hci_stack->le_scanning_active) { 4305 // stop if: 4306 // - parameter change required 4307 // - it's disabled 4308 // - whitelist change required but used for scanning 4309 // - resolving list modified 4310 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4311 if ((hci_stack->le_scanning_param_update) || 4312 !hci_stack->le_scanning_enabled || 4313 scanning_uses_whitelist || 4314 resolving_list_modification_pending){ 4315 4316 scanning_stop = true; 4317 } 4318 } 4319 #endif 4320 4321 #ifdef ENABLE_LE_CENTRAL 4322 // connecting control 4323 bool connecting_with_whitelist; 4324 switch (hci_stack->le_connecting_state){ 4325 case LE_CONNECTING_DIRECT: 4326 case LE_CONNECTING_WHITELIST: 4327 // stop connecting if: 4328 // - connecting uses white and whitelist modification pending 4329 // - if it got disabled 4330 // - resolving list modified 4331 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4332 if ((connecting_with_whitelist && whitelist_modification_pending) || 4333 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4334 resolving_list_modification_pending) { 4335 4336 connecting_stop = true; 4337 } 4338 break; 4339 default: 4340 break; 4341 } 4342 #endif 4343 4344 #ifdef ENABLE_LE_PERIPHERAL 4345 // le advertisement control 4346 if (hci_stack->le_advertisements_active){ 4347 // stop if: 4348 // - parameter change required 4349 // - it's disabled 4350 // - whitelist change required but used for advertisement filter policy 4351 // - resolving list modified 4352 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4353 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4354 if (advertising_change || 4355 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4356 (advertising_uses_whitelist & whitelist_modification_pending) || 4357 resolving_list_modification_pending) { 4358 4359 advertising_stop = true; 4360 } 4361 } 4362 #endif 4363 4364 4365 // Phase 2: stop everything that should be off during modifications 4366 4367 #ifdef ENABLE_LE_CENTRAL 4368 if (scanning_stop){ 4369 hci_stack->le_scanning_active = false; 4370 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4371 return true; 4372 } 4373 #endif 4374 4375 #ifdef ENABLE_LE_CENTRAL 4376 if (connecting_stop){ 4377 hci_send_cmd(&hci_le_create_connection_cancel); 4378 return true; 4379 } 4380 #endif 4381 4382 #ifdef ENABLE_LE_PERIPHERAL 4383 if (advertising_stop){ 4384 hci_stack->le_advertisements_active = false; 4385 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4386 return true; 4387 } 4388 #endif 4389 4390 // Phase 3: modify 4391 4392 #ifdef ENABLE_LE_CENTRAL 4393 if (hci_stack->le_scanning_param_update){ 4394 hci_stack->le_scanning_param_update = false; 4395 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4396 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4397 return true; 4398 } 4399 #endif 4400 4401 #ifdef ENABLE_LE_PERIPHERAL 4402 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4403 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4404 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4405 hci_send_cmd(&hci_le_set_advertising_parameters, 4406 hci_stack->le_advertisements_interval_min, 4407 hci_stack->le_advertisements_interval_max, 4408 hci_stack->le_advertisements_type, 4409 hci_stack->le_advertisements_own_addr_type, 4410 hci_stack->le_advertisements_direct_address_type, 4411 hci_stack->le_advertisements_direct_address, 4412 hci_stack->le_advertisements_channel_map, 4413 hci_stack->le_advertisements_filter_policy); 4414 return true; 4415 } 4416 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4417 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4418 uint8_t adv_data_clean[31]; 4419 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4420 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4421 hci_stack->le_advertisements_data_len); 4422 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4423 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4424 return true; 4425 } 4426 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4427 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4428 uint8_t scan_data_clean[31]; 4429 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4430 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4431 hci_stack->le_scan_response_data_len); 4432 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4433 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4434 return true; 4435 } 4436 #endif 4437 4438 4439 #ifdef ENABLE_LE_CENTRAL 4440 // if connect with whitelist was active and is not cancelled yet, wait until next time 4441 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4442 #endif 4443 4444 // LE Whitelist Management 4445 if (whitelist_modification_pending){ 4446 // add/remove entries 4447 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4448 while (btstack_linked_list_iterator_has_next(&lit)){ 4449 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4450 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4451 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4452 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4453 return true; 4454 } 4455 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4456 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4457 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4458 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4459 return true; 4460 } 4461 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4462 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4463 btstack_memory_whitelist_entry_free(entry); 4464 } 4465 } 4466 } 4467 4468 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4469 // LE Resolving List Management 4470 if (resolving_list_supported) { 4471 uint16_t i; 4472 switch (hci_stack->le_resolving_list_state) { 4473 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4474 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4475 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4476 return true; 4477 case LE_RESOLVING_LIST_READ_SIZE: 4478 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4479 hci_send_cmd(&hci_le_read_resolving_list_size); 4480 return true; 4481 case LE_RESOLVING_LIST_SEND_CLEAR: 4482 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4483 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4484 sizeof(hci_stack->le_resolving_list_add_entries)); 4485 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4486 sizeof(hci_stack->le_resolving_list_remove_entries)); 4487 hci_send_cmd(&hci_le_clear_resolving_list); 4488 return true; 4489 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4490 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4491 uint8_t offset = i >> 3; 4492 uint8_t mask = 1 << (i & 7); 4493 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4494 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4495 bd_addr_t peer_identity_addreses; 4496 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4497 sm_key_t peer_irk; 4498 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4499 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4500 4501 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4502 // trigger whitelist entry 'update' (work around for controller bug) 4503 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4504 while (btstack_linked_list_iterator_has_next(&lit)) { 4505 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4506 if (entry->address_type != peer_identity_addr_type) continue; 4507 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4508 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4509 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4510 } 4511 #endif 4512 4513 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4514 peer_identity_addreses); 4515 return true; 4516 } 4517 4518 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4519 4520 /* fall through */ 4521 4522 case LE_RESOLVING_LIST_ADD_ENTRIES: 4523 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4524 uint8_t offset = i >> 3; 4525 uint8_t mask = 1 << (i & 7); 4526 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4527 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4528 bd_addr_t peer_identity_addreses; 4529 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4530 sm_key_t peer_irk; 4531 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4532 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4533 const uint8_t *local_irk = gap_get_persistent_irk(); 4534 // command uses format specifier 'P' that stores 16-byte value without flip 4535 uint8_t local_irk_flipped[16]; 4536 uint8_t peer_irk_flipped[16]; 4537 reverse_128(local_irk, local_irk_flipped); 4538 reverse_128(peer_irk, peer_irk_flipped); 4539 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4540 peer_irk_flipped, local_irk_flipped); 4541 return true; 4542 } 4543 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4544 break; 4545 4546 default: 4547 break; 4548 } 4549 } 4550 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4551 #endif 4552 4553 // Phase 4: restore state 4554 4555 #ifdef ENABLE_LE_CENTRAL 4556 // re-start scanning 4557 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4558 hci_stack->le_scanning_active = true; 4559 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4560 return true; 4561 } 4562 #endif 4563 4564 #ifdef ENABLE_LE_CENTRAL 4565 // re-start connecting 4566 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4567 bd_addr_t null_addr; 4568 memset(null_addr, 0, 6); 4569 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4570 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4571 hci_send_cmd(&hci_le_create_connection, 4572 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4573 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4574 1, // use whitelist 4575 0, // peer address type 4576 null_addr, // peer bd addr 4577 hci_stack->le_connection_own_addr_type, // our addr type: 4578 hci_stack->le_connection_interval_min, // conn interval min 4579 hci_stack->le_connection_interval_max, // conn interval max 4580 hci_stack->le_connection_latency, // conn latency 4581 hci_stack->le_supervision_timeout, // conn latency 4582 hci_stack->le_minimum_ce_length, // min ce length 4583 hci_stack->le_maximum_ce_length // max ce length 4584 ); 4585 return true; 4586 } 4587 #endif 4588 4589 #ifdef ENABLE_LE_PERIPHERAL 4590 // re-start advertising 4591 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4592 // check if advertisements should be enabled given 4593 hci_stack->le_advertisements_active = true; 4594 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4595 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4596 return true; 4597 } 4598 #endif 4599 4600 return false; 4601 } 4602 #endif 4603 4604 static bool hci_run_general_pending_commands(void){ 4605 btstack_linked_item_t * it; 4606 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4607 hci_connection_t * connection = (hci_connection_t *) it; 4608 4609 switch(connection->state){ 4610 case SEND_CREATE_CONNECTION: 4611 switch(connection->address_type){ 4612 #ifdef ENABLE_CLASSIC 4613 case BD_ADDR_TYPE_ACL: 4614 log_info("sending hci_create_connection"); 4615 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4616 break; 4617 #endif 4618 default: 4619 #ifdef ENABLE_BLE 4620 #ifdef ENABLE_LE_CENTRAL 4621 log_info("sending hci_le_create_connection"); 4622 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4623 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4624 hci_send_cmd(&hci_le_create_connection, 4625 hci_stack->le_connection_scan_interval, // conn scan interval 4626 hci_stack->le_connection_scan_window, // conn scan windows 4627 0, // don't use whitelist 4628 connection->address_type, // peer address type 4629 connection->address, // peer bd addr 4630 hci_stack->le_connection_own_addr_type, // our addr type: 4631 hci_stack->le_connection_interval_min, // conn interval min 4632 hci_stack->le_connection_interval_max, // conn interval max 4633 hci_stack->le_connection_latency, // conn latency 4634 hci_stack->le_supervision_timeout, // conn latency 4635 hci_stack->le_minimum_ce_length, // min ce length 4636 hci_stack->le_maximum_ce_length // max ce length 4637 ); 4638 connection->state = SENT_CREATE_CONNECTION; 4639 #endif 4640 #endif 4641 break; 4642 } 4643 return true; 4644 4645 #ifdef ENABLE_CLASSIC 4646 case RECEIVED_CONNECTION_REQUEST: 4647 connection->role = HCI_ROLE_SLAVE; 4648 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4649 log_info("sending hci_accept_connection_request"); 4650 connection->state = ACCEPTED_CONNECTION_REQUEST; 4651 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4652 } 4653 return true; 4654 #endif 4655 4656 #ifdef ENABLE_BLE 4657 #ifdef ENABLE_LE_CENTRAL 4658 case SEND_CANCEL_CONNECTION: 4659 connection->state = SENT_CANCEL_CONNECTION; 4660 hci_send_cmd(&hci_le_create_connection_cancel); 4661 return true; 4662 #endif 4663 #endif 4664 case SEND_DISCONNECT: 4665 connection->state = SENT_DISCONNECT; 4666 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4667 return true; 4668 4669 default: 4670 break; 4671 } 4672 4673 // no further commands if connection is about to get shut down 4674 if (connection->state == SENT_DISCONNECT) continue; 4675 4676 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4677 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4678 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4679 return true; 4680 } 4681 4682 #ifdef ENABLE_CLASSIC 4683 4684 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4686 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4687 return true; 4688 } 4689 4690 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4691 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4692 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4693 return true; 4694 } 4695 4696 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4697 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4698 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4699 return true; 4700 } 4701 4702 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4703 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4704 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4705 return true; 4706 } 4707 4708 // Handling link key request requires remote supported features 4709 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4710 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4711 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4712 4713 // lookup link key using cached key first 4714 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4715 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4716 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4717 } 4718 4719 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4720 if (have_link_key && security_level_sufficient){ 4721 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4722 } else { 4723 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4724 } 4725 return true; 4726 } 4727 4728 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4729 log_info("denying to pin request"); 4730 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4731 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4732 return true; 4733 } 4734 4735 // security assessment requires remote features 4736 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4737 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4738 hci_ssp_assess_security_on_io_cap_request(connection); 4739 // no return here as hci_ssp_assess_security_on_io_cap_request only sets AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY or AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY 4740 } 4741 4742 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4743 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4744 // set authentication requirements: 4745 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4746 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4747 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4748 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4749 authreq |= 1; 4750 } 4751 bool bonding = hci_stack->bondable; 4752 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4753 // if we have received IO Cap Response, we're in responder role 4754 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4755 if (bonding && !remote_bonding){ 4756 log_info("Remote not bonding, dropping local flag"); 4757 bonding = false; 4758 } 4759 } 4760 if (bonding){ 4761 if (connection->bonding_flags & BONDING_DEDICATED){ 4762 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4763 } else { 4764 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4765 } 4766 } 4767 uint8_t have_oob_data = 0; 4768 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4769 if (connection->classic_oob_c_192 != NULL){ 4770 have_oob_data |= 1; 4771 } 4772 if (connection->classic_oob_c_256 != NULL){ 4773 have_oob_data |= 2; 4774 } 4775 #endif 4776 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4777 return true; 4778 } 4779 4780 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4781 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4782 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4783 return true; 4784 } 4785 4786 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4787 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4788 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4789 const uint8_t zero[16] = { 0 }; 4790 const uint8_t * r_192 = zero; 4791 const uint8_t * c_192 = zero; 4792 const uint8_t * r_256 = zero; 4793 const uint8_t * c_256 = zero; 4794 // verify P-256 OOB 4795 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4796 c_256 = connection->classic_oob_c_256; 4797 if (connection->classic_oob_r_256 != NULL) { 4798 r_256 = connection->classic_oob_r_256; 4799 } 4800 } 4801 // verify P-192 OOB 4802 if ((connection->classic_oob_c_192 != NULL)) { 4803 c_192 = connection->classic_oob_c_192; 4804 if (connection->classic_oob_r_192 != NULL) { 4805 r_192 = connection->classic_oob_r_192; 4806 } 4807 } 4808 4809 // assess security 4810 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4811 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4812 if (need_level_4 && !can_reach_level_4){ 4813 log_info("Level 4 required, but not possible -> abort"); 4814 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4815 // send oob negative reply 4816 c_256 = NULL; 4817 c_192 = NULL; 4818 } 4819 4820 // Reply 4821 if (c_256 != zero) { 4822 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4823 } else if (c_192 != zero){ 4824 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4825 } else { 4826 hci_stack->classic_oob_con_handle = connection->con_handle; 4827 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4828 } 4829 return true; 4830 } 4831 #endif 4832 4833 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4834 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4835 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4836 return true; 4837 } 4838 4839 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4840 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4841 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4842 return true; 4843 } 4844 4845 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4846 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4847 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4848 return true; 4849 } 4850 4851 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4852 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4853 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4854 connection->state = SENT_DISCONNECT; 4855 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4856 return true; 4857 } 4858 4859 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4860 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4861 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4862 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4863 return true; 4864 } 4865 4866 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4867 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4868 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4869 return true; 4870 } 4871 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4872 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4873 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4874 return true; 4875 } 4876 #endif 4877 4878 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4879 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4880 #ifdef ENABLE_CLASSIC 4881 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4882 #endif 4883 if (connection->state != SENT_DISCONNECT){ 4884 connection->state = SENT_DISCONNECT; 4885 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4886 return true; 4887 } 4888 } 4889 4890 #ifdef ENABLE_CLASSIC 4891 uint16_t sniff_min_interval; 4892 switch (connection->sniff_min_interval){ 4893 case 0: 4894 break; 4895 case 0xffff: 4896 connection->sniff_min_interval = 0; 4897 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4898 return true; 4899 default: 4900 sniff_min_interval = connection->sniff_min_interval; 4901 connection->sniff_min_interval = 0; 4902 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4903 return true; 4904 } 4905 4906 if (connection->sniff_subrating_max_latency != 0xffff){ 4907 uint16_t max_latency = connection->sniff_subrating_max_latency; 4908 connection->sniff_subrating_max_latency = 0; 4909 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4910 return true; 4911 } 4912 4913 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4914 uint8_t service_type = (uint8_t) connection->qos_service_type; 4915 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4916 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); 4917 return true; 4918 } 4919 4920 if (connection->request_role != HCI_ROLE_INVALID){ 4921 hci_role_t role = connection->request_role; 4922 connection->request_role = HCI_ROLE_INVALID; 4923 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4924 return true; 4925 } 4926 #endif 4927 4928 #ifdef ENABLE_BLE 4929 switch (connection->le_con_parameter_update_state){ 4930 // response to L2CAP CON PARAMETER UPDATE REQUEST 4931 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4932 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4933 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4934 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4935 0x0000, 0xffff); 4936 return true; 4937 case CON_PARAMETER_UPDATE_REPLY: 4938 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4939 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4940 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4941 0x0000, 0xffff); 4942 return true; 4943 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4944 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4945 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4946 return true; 4947 default: 4948 break; 4949 } 4950 if (connection->le_phy_update_all_phys != 0xffu){ 4951 uint8_t all_phys = connection->le_phy_update_all_phys; 4952 connection->le_phy_update_all_phys = 0xff; 4953 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); 4954 return true; 4955 } 4956 #endif 4957 } 4958 return false; 4959 } 4960 4961 static void hci_run(void){ 4962 4963 bool done; 4964 4965 // send continuation fragments first, as they block the prepared packet buffer 4966 done = hci_run_acl_fragments(); 4967 if (done) return; 4968 4969 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4970 // send host num completed packets next as they don't require num_cmd_packets > 0 4971 if (!hci_can_send_comand_packet_transport()) return; 4972 if (hci_stack->host_completed_packets){ 4973 hci_host_num_completed_packets(); 4974 return; 4975 } 4976 #endif 4977 4978 if (!hci_can_send_command_packet_now()) return; 4979 4980 // global/non-connection oriented commands 4981 4982 4983 #ifdef ENABLE_CLASSIC 4984 // general gap classic 4985 done = hci_run_general_gap_classic(); 4986 if (done) return; 4987 #endif 4988 4989 #ifdef ENABLE_BLE 4990 // general gap le 4991 done = hci_run_general_gap_le(); 4992 if (done) return; 4993 #endif 4994 4995 // send pending HCI commands 4996 done = hci_run_general_pending_commands(); 4997 if (done) return; 4998 4999 // stack state sub statemachines 5000 hci_connection_t * connection; 5001 switch (hci_stack->state){ 5002 case HCI_STATE_INITIALIZING: 5003 hci_initializing_run(); 5004 break; 5005 5006 case HCI_STATE_HALTING: 5007 5008 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5009 switch (hci_stack->substate){ 5010 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5011 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5012 5013 #ifdef ENABLE_BLE 5014 #ifdef ENABLE_LE_CENTRAL 5015 // free whitelist entries 5016 { 5017 btstack_linked_list_iterator_t lit; 5018 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5019 while (btstack_linked_list_iterator_has_next(&lit)){ 5020 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5021 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5022 btstack_memory_whitelist_entry_free(entry); 5023 } 5024 } 5025 #endif 5026 #endif 5027 // close all open connections 5028 connection = (hci_connection_t *) hci_stack->connections; 5029 if (connection){ 5030 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5031 if (!hci_can_send_command_packet_now()) return; 5032 5033 // check state 5034 if (connection->state == SENT_DISCONNECT) return; 5035 connection->state = SENT_DISCONNECT; 5036 5037 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5038 5039 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5040 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5041 5042 // ... which would be ignored anyway as we shutdown (free) the connection now 5043 hci_shutdown_connection(connection); 5044 5045 // finally, send the disconnect command 5046 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5047 return; 5048 } 5049 5050 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5051 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5052 log_info("HCI_STATE_HALTING: wait 50 ms"); 5053 hci_stack->substate = HCI_HALTING_W4_TIMER; 5054 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5055 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5056 btstack_run_loop_add_timer(&hci_stack->timeout); 5057 break; 5058 } 5059 5060 /* fall through */ 5061 5062 case HCI_HALTING_CLOSE: 5063 log_info("HCI_STATE_HALTING, calling off"); 5064 5065 // switch mode 5066 hci_power_control_off(); 5067 5068 log_info("HCI_STATE_HALTING, emitting state"); 5069 hci_emit_state(); 5070 log_info("HCI_STATE_HALTING, done"); 5071 break; 5072 5073 case HCI_HALTING_W4_TIMER: 5074 // keep waiting 5075 5076 break; 5077 default: 5078 break; 5079 } 5080 5081 break; 5082 5083 case HCI_STATE_FALLING_ASLEEP: 5084 switch(hci_stack->substate) { 5085 case HCI_FALLING_ASLEEP_DISCONNECT: 5086 log_info("HCI_STATE_FALLING_ASLEEP"); 5087 // close all open connections 5088 connection = (hci_connection_t *) hci_stack->connections; 5089 5090 #ifdef HAVE_PLATFORM_IPHONE_OS 5091 // don't close connections, if H4 supports power management 5092 if (btstack_control_iphone_power_management_enabled()){ 5093 connection = NULL; 5094 } 5095 #endif 5096 if (connection){ 5097 5098 // send disconnect 5099 if (!hci_can_send_command_packet_now()) return; 5100 5101 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5102 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5103 5104 // send disconnected event right away - causes higher layer connections to get closed, too. 5105 hci_shutdown_connection(connection); 5106 return; 5107 } 5108 5109 if (hci_classic_supported()){ 5110 // disable page and inquiry scan 5111 if (!hci_can_send_command_packet_now()) return; 5112 5113 log_info("HCI_STATE_HALTING, disabling inq scans"); 5114 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5115 5116 // continue in next sub state 5117 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5118 break; 5119 } 5120 5121 /* fall through */ 5122 5123 case HCI_FALLING_ASLEEP_COMPLETE: 5124 log_info("HCI_STATE_HALTING, calling sleep"); 5125 #ifdef HAVE_PLATFORM_IPHONE_OS 5126 // don't actually go to sleep, if H4 supports power management 5127 if (btstack_control_iphone_power_management_enabled()){ 5128 // SLEEP MODE reached 5129 hci_stack->state = HCI_STATE_SLEEPING; 5130 hci_emit_state(); 5131 break; 5132 } 5133 #endif 5134 // switch mode 5135 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5136 hci_emit_state(); 5137 break; 5138 5139 default: 5140 break; 5141 } 5142 break; 5143 5144 default: 5145 break; 5146 } 5147 } 5148 5149 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5150 // house-keeping 5151 5152 #ifdef ENABLE_CLASSIC 5153 bd_addr_t addr; 5154 hci_connection_t * conn; 5155 #endif 5156 #ifdef ENABLE_LE_CENTRAL 5157 uint8_t initiator_filter_policy; 5158 #endif 5159 5160 uint16_t opcode = little_endian_read_16(packet, 0); 5161 switch (opcode) { 5162 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5163 hci_stack->loopback_mode = packet[3]; 5164 break; 5165 5166 #ifdef ENABLE_CLASSIC 5167 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5168 reverse_bd_addr(&packet[3], addr); 5169 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5170 5171 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5172 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5173 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5174 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5175 } 5176 5177 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5178 if (!conn) { 5179 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5180 if (!conn) { 5181 // notify client that alloc failed 5182 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5183 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5184 } 5185 conn->state = SEND_CREATE_CONNECTION; 5186 conn->role = HCI_ROLE_MASTER; 5187 } 5188 5189 conn->con_handle = HCI_CON_HANDLE_INVALID; 5190 conn->role = HCI_ROLE_INVALID; 5191 5192 log_info("conn state %u", conn->state); 5193 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5194 switch (conn->state) { 5195 // if connection active exists 5196 case OPEN: 5197 // and OPEN, emit connection complete command 5198 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5199 // packet not sent to controller 5200 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5201 case RECEIVED_DISCONNECTION_COMPLETE: 5202 // create connection triggered in disconnect complete event, let's do it now 5203 break; 5204 case SEND_CREATE_CONNECTION: 5205 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5206 break; 5207 default: 5208 // otherwise, just ignore as it is already in the open process 5209 // packet not sent to controller 5210 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5211 } 5212 conn->state = SENT_CREATE_CONNECTION; 5213 5214 // track outgoing connection 5215 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5216 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5217 break; 5218 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5219 if (hci_stack->link_key_db) { 5220 reverse_bd_addr(&packet[3], addr); 5221 hci_stack->link_key_db->delete_link_key(addr); 5222 } 5223 break; 5224 5225 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5226 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5227 // setup_synchronous_connection? Voice setting at offset 22 5228 // TODO: compare to current setting if sco connection already active 5229 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5230 break; 5231 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5232 // accept_synchronus_connection? Voice setting at offset 18 5233 // TODO: compare to current setting if sco connection already active 5234 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5235 break; 5236 #endif 5237 #endif 5238 5239 #ifdef ENABLE_BLE 5240 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5241 hci_stack->le_random_address_set = 1; 5242 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5243 break; 5244 #ifdef ENABLE_LE_PERIPHERAL 5245 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5246 hci_stack->le_advertisements_active = packet[3] != 0; 5247 break; 5248 #endif 5249 #ifdef ENABLE_LE_CENTRAL 5250 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5251 // white list used? 5252 initiator_filter_policy = packet[7]; 5253 switch (initiator_filter_policy) { 5254 case 0: 5255 // whitelist not used 5256 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5257 break; 5258 case 1: 5259 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5260 break; 5261 default: 5262 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5263 break; 5264 } 5265 // track outgoing connection 5266 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5267 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5268 break; 5269 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5270 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5271 break; 5272 #endif 5273 #endif 5274 default: 5275 break; 5276 } 5277 5278 hci_stack->num_cmd_packets--; 5279 5280 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5281 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5282 if (err != 0){ 5283 return ERROR_CODE_HARDWARE_FAILURE; 5284 } 5285 return ERROR_CODE_SUCCESS; 5286 } 5287 5288 // disconnect because of security block 5289 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5290 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5291 if (!connection) return; 5292 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5293 } 5294 5295 5296 // Configure Secure Simple Pairing 5297 5298 #ifdef ENABLE_CLASSIC 5299 5300 // enable will enable SSP during init 5301 void gap_ssp_set_enable(int enable){ 5302 hci_stack->ssp_enable = enable; 5303 } 5304 5305 static int hci_local_ssp_activated(void){ 5306 return gap_ssp_supported() && hci_stack->ssp_enable; 5307 } 5308 5309 // if set, BTstack will respond to io capability request using authentication requirement 5310 void gap_ssp_set_io_capability(int io_capability){ 5311 hci_stack->ssp_io_capability = io_capability; 5312 } 5313 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5314 hci_stack->ssp_authentication_requirement = authentication_requirement; 5315 } 5316 5317 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5318 void gap_ssp_set_auto_accept(int auto_accept){ 5319 hci_stack->ssp_auto_accept = auto_accept; 5320 } 5321 5322 void gap_secure_connections_enable(bool enable){ 5323 hci_stack->secure_connections_enable = enable; 5324 } 5325 5326 #endif 5327 5328 // va_list part of hci_send_cmd 5329 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5330 if (!hci_can_send_command_packet_now()){ 5331 log_error("hci_send_cmd called but cannot send packet now"); 5332 return ERROR_CODE_COMMAND_DISALLOWED; 5333 } 5334 5335 // for HCI INITIALIZATION 5336 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5337 hci_stack->last_cmd_opcode = cmd->opcode; 5338 5339 hci_reserve_packet_buffer(); 5340 uint8_t * packet = hci_stack->hci_packet_buffer; 5341 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5342 uint8_t status = hci_send_cmd_packet(packet, size); 5343 5344 // release packet buffer on error or for synchronous transport implementations 5345 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5346 hci_release_packet_buffer(); 5347 hci_emit_transport_packet_sent(); 5348 } 5349 5350 return status; 5351 } 5352 5353 /** 5354 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5355 */ 5356 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5357 va_list argptr; 5358 va_start(argptr, cmd); 5359 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5360 va_end(argptr); 5361 return status; 5362 } 5363 5364 // Create various non-HCI events. 5365 // TODO: generalize, use table similar to hci_create_command 5366 5367 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5368 // dump packet 5369 if (dump) { 5370 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5371 } 5372 5373 // dispatch to all event handlers 5374 btstack_linked_list_iterator_t it; 5375 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5376 while (btstack_linked_list_iterator_has_next(&it)){ 5377 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5378 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5379 } 5380 } 5381 5382 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5383 if (!hci_stack->acl_packet_handler) return; 5384 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5385 } 5386 5387 #ifdef ENABLE_CLASSIC 5388 static void hci_notify_if_sco_can_send_now(void){ 5389 // notify SCO sender if waiting 5390 if (!hci_stack->sco_waiting_for_can_send_now) return; 5391 if (hci_can_send_sco_packet_now()){ 5392 hci_stack->sco_waiting_for_can_send_now = 0; 5393 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5394 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5395 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5396 } 5397 } 5398 5399 // parsing end emitting has been merged to reduce code size 5400 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5401 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5402 5403 uint8_t * eir_data; 5404 ad_context_t context; 5405 const uint8_t * name; 5406 uint8_t name_len; 5407 5408 if (size < 3) return; 5409 5410 int event_type = hci_event_packet_get_type(packet); 5411 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5412 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5413 5414 switch (event_type){ 5415 case HCI_EVENT_INQUIRY_RESULT: 5416 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5417 if (size != (3 + (num_responses * 14))) return; 5418 break; 5419 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5420 if (size != 257) return; 5421 if (num_responses != 1) return; 5422 break; 5423 default: 5424 return; 5425 } 5426 5427 // event[1] is set at the end 5428 int i; 5429 for (i=0; i<num_responses;i++){ 5430 memset(event, 0, sizeof(event)); 5431 event[0] = GAP_EVENT_INQUIRY_RESULT; 5432 uint8_t event_size = 27; // if name is not set by EIR 5433 5434 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5435 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5436 (void)memcpy(&event[9], 5437 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5438 3); // class of device 5439 (void)memcpy(&event[12], 5440 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5441 2); // clock offset 5442 5443 switch (event_type){ 5444 case HCI_EVENT_INQUIRY_RESULT: 5445 // 14,15,16,17 = 0, size 18 5446 break; 5447 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5448 event[14] = 1; 5449 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5450 // 16,17 = 0, size 18 5451 break; 5452 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5453 event[14] = 1; 5454 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5455 // EIR packets only contain a single inquiry response 5456 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5457 name = NULL; 5458 // Iterate over EIR data 5459 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5460 uint8_t data_type = ad_iterator_get_data_type(&context); 5461 uint8_t data_size = ad_iterator_get_data_len(&context); 5462 const uint8_t * data = ad_iterator_get_data(&context); 5463 // Prefer Complete Local Name over Shortened Local Name 5464 switch (data_type){ 5465 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5466 if (name) continue; 5467 /* fall through */ 5468 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5469 name = data; 5470 name_len = data_size; 5471 break; 5472 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5473 if (data_size != 8) break; 5474 event[16] = 1; 5475 memcpy(&event[17], data, 8); 5476 break; 5477 default: 5478 break; 5479 } 5480 } 5481 if (name){ 5482 event[25] = 1; 5483 // truncate name if needed 5484 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5485 event[26] = len; 5486 (void)memcpy(&event[27], name, len); 5487 event_size += len; 5488 } 5489 break; 5490 default: 5491 return; 5492 } 5493 event[1] = event_size - 2; 5494 hci_emit_event(event, event_size, 1); 5495 } 5496 } 5497 #endif 5498 5499 void hci_emit_state(void){ 5500 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5501 uint8_t event[3]; 5502 event[0] = BTSTACK_EVENT_STATE; 5503 event[1] = sizeof(event) - 2u; 5504 event[2] = hci_stack->state; 5505 hci_emit_event(event, sizeof(event), 1); 5506 } 5507 5508 #ifdef ENABLE_CLASSIC 5509 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5510 uint8_t event[13]; 5511 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5512 event[1] = sizeof(event) - 2; 5513 event[2] = status; 5514 little_endian_store_16(event, 3, con_handle); 5515 reverse_bd_addr(address, &event[5]); 5516 event[11] = 1; // ACL connection 5517 event[12] = 0; // encryption disabled 5518 hci_emit_event(event, sizeof(event), 1); 5519 } 5520 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5521 if (disable_l2cap_timeouts) return; 5522 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5523 uint8_t event[4]; 5524 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5525 event[1] = sizeof(event) - 2; 5526 little_endian_store_16(event, 2, conn->con_handle); 5527 hci_emit_event(event, sizeof(event), 1); 5528 } 5529 #endif 5530 5531 #ifdef ENABLE_BLE 5532 #ifdef ENABLE_LE_CENTRAL 5533 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){ 5534 uint8_t event[21]; 5535 event[0] = HCI_EVENT_LE_META; 5536 event[1] = sizeof(event) - 2u; 5537 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5538 event[3] = status; 5539 little_endian_store_16(event, 4, con_handle); 5540 event[6] = 0; // TODO: role 5541 event[7] = address_type; 5542 reverse_bd_addr(address, &event[8]); 5543 little_endian_store_16(event, 14, 0); // interval 5544 little_endian_store_16(event, 16, 0); // latency 5545 little_endian_store_16(event, 18, 0); // supervision timeout 5546 event[20] = 0; // master clock accuracy 5547 hci_emit_event(event, sizeof(event), 1); 5548 } 5549 #endif 5550 #endif 5551 5552 static void hci_emit_transport_packet_sent(void){ 5553 // notify upper stack that it might be possible to send again 5554 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5555 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5556 } 5557 5558 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5559 uint8_t event[6]; 5560 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5561 event[1] = sizeof(event) - 2u; 5562 event[2] = 0; // status = OK 5563 little_endian_store_16(event, 3, con_handle); 5564 event[5] = reason; 5565 hci_emit_event(event, sizeof(event), 1); 5566 } 5567 5568 static void hci_emit_nr_connections_changed(void){ 5569 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5570 uint8_t event[3]; 5571 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5572 event[1] = sizeof(event) - 2u; 5573 event[2] = nr_hci_connections(); 5574 hci_emit_event(event, sizeof(event), 1); 5575 } 5576 5577 static void hci_emit_hci_open_failed(void){ 5578 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5579 uint8_t event[2]; 5580 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5581 event[1] = sizeof(event) - 2u; 5582 hci_emit_event(event, sizeof(event), 1); 5583 } 5584 5585 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5586 log_info("hci_emit_dedicated_bonding_result %u ", status); 5587 uint8_t event[9]; 5588 int pos = 0; 5589 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5590 event[pos++] = sizeof(event) - 2u; 5591 event[pos++] = status; 5592 reverse_bd_addr(address, &event[pos]); 5593 hci_emit_event(event, sizeof(event), 1); 5594 } 5595 5596 5597 #ifdef ENABLE_CLASSIC 5598 5599 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5600 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5601 uint8_t event[5]; 5602 int pos = 0; 5603 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5604 event[pos++] = sizeof(event) - 2; 5605 little_endian_store_16(event, 2, con_handle); 5606 pos += 2; 5607 event[pos++] = level; 5608 hci_emit_event(event, sizeof(event), 1); 5609 } 5610 5611 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5612 if (!connection) return LEVEL_0; 5613 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5614 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5615 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5616 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5617 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5618 // LEVEL 4 always requires 128 bit encrytion key size 5619 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5620 security_level = LEVEL_3; 5621 } 5622 return security_level; 5623 } 5624 5625 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5626 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5627 uint8_t event[3]; 5628 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5629 event[1] = sizeof(event) - 2; 5630 event[2] = enabled; 5631 hci_emit_event(event, sizeof(event), 1); 5632 } 5633 5634 // query if remote side supports eSCO 5635 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5636 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5637 if (!connection) return false; 5638 return (connection->remote_supported_features[0] & 1) != 0; 5639 } 5640 5641 static bool hci_ssp_supported(hci_connection_t * connection){ 5642 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5643 return (connection->bonding_flags & mask) == mask; 5644 } 5645 5646 // query if remote side supports SSP 5647 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5648 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5649 if (!connection) return false; 5650 return hci_ssp_supported(connection) ? 1 : 0; 5651 } 5652 5653 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5654 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5655 } 5656 5657 // GAP API 5658 /** 5659 * @bbrief enable/disable bonding. default is enabled 5660 * @praram enabled 5661 */ 5662 void gap_set_bondable_mode(int enable){ 5663 hci_stack->bondable = enable ? 1 : 0; 5664 } 5665 /** 5666 * @brief Get bondable mode. 5667 * @return 1 if bondable 5668 */ 5669 int gap_get_bondable_mode(void){ 5670 return hci_stack->bondable; 5671 } 5672 5673 /** 5674 * @brief map link keys to security levels 5675 */ 5676 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5677 switch (link_key_type){ 5678 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5679 return LEVEL_4; 5680 case COMBINATION_KEY: 5681 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5682 return LEVEL_3; 5683 default: 5684 return LEVEL_2; 5685 } 5686 } 5687 5688 /** 5689 * @brief map link keys to secure connection yes/no 5690 */ 5691 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5692 switch (link_key_type){ 5693 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5694 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5695 return 1; 5696 default: 5697 return 0; 5698 } 5699 } 5700 5701 /** 5702 * @brief map link keys to authenticated 5703 */ 5704 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5705 switch (link_key_type){ 5706 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5707 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5708 return 1; 5709 default: 5710 return 0; 5711 } 5712 } 5713 5714 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5715 log_info("gap_mitm_protection_required_for_security_level %u", level); 5716 return level > LEVEL_2; 5717 } 5718 5719 /** 5720 * @brief get current security level 5721 */ 5722 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5723 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5724 if (!connection) return LEVEL_0; 5725 return gap_security_level_for_connection(connection); 5726 } 5727 5728 /** 5729 * @brief request connection to device to 5730 * @result GAP_AUTHENTICATION_RESULT 5731 */ 5732 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5733 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5734 if (!connection){ 5735 hci_emit_security_level(con_handle, LEVEL_0); 5736 return; 5737 } 5738 5739 btstack_assert(hci_is_le_connection(connection) == false); 5740 5741 // 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) 5742 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5743 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5744 requested_level = LEVEL_4; 5745 } 5746 5747 gap_security_level_t current_level = gap_security_level(con_handle); 5748 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5749 requested_level, connection->requested_security_level, current_level); 5750 5751 // authentication active if authentication request was sent or planned level > 0 5752 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5753 if (authentication_active){ 5754 // authentication already active 5755 if (connection->requested_security_level < requested_level){ 5756 // increase requested level as new level is higher 5757 // TODO: handle re-authentication when done 5758 connection->requested_security_level = requested_level; 5759 } 5760 } else { 5761 // no request active, notify if security sufficient 5762 if (requested_level <= current_level){ 5763 hci_emit_security_level(con_handle, current_level); 5764 return; 5765 } 5766 5767 // store request 5768 connection->requested_security_level = requested_level; 5769 5770 // start to authenticate connection 5771 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5772 hci_run(); 5773 } 5774 } 5775 5776 /** 5777 * @brief start dedicated bonding with device. disconnect after bonding 5778 * @param device 5779 * @param request MITM protection 5780 * @result GAP_DEDICATED_BONDING_COMPLETE 5781 */ 5782 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5783 5784 // create connection state machine 5785 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5786 5787 if (!connection){ 5788 return BTSTACK_MEMORY_ALLOC_FAILED; 5789 } 5790 5791 // delete linkn key 5792 gap_drop_link_key_for_bd_addr(device); 5793 5794 // configure LEVEL_2/3, dedicated bonding 5795 connection->state = SEND_CREATE_CONNECTION; 5796 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5797 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5798 connection->bonding_flags = BONDING_DEDICATED; 5799 5800 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5801 5802 // handle: connnection failure (connection complete != ok) 5803 // handle: authentication failure 5804 // handle: disconnect on done 5805 5806 hci_run(); 5807 5808 return 0; 5809 } 5810 5811 void gap_set_local_name(const char * local_name){ 5812 hci_stack->local_name = local_name; 5813 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5814 // also update EIR if not set by user 5815 if (hci_stack->eir_data == NULL){ 5816 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5817 } 5818 hci_run(); 5819 } 5820 #endif 5821 5822 5823 #ifdef ENABLE_BLE 5824 5825 #ifdef ENABLE_LE_CENTRAL 5826 void gap_start_scan(void){ 5827 hci_stack->le_scanning_enabled = true; 5828 hci_run(); 5829 } 5830 5831 void gap_stop_scan(void){ 5832 hci_stack->le_scanning_enabled = false; 5833 hci_run(); 5834 } 5835 5836 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5837 hci_stack->le_scan_type = scan_type; 5838 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5839 hci_stack->le_scan_interval = scan_interval; 5840 hci_stack->le_scan_window = scan_window; 5841 hci_stack->le_scanning_param_update = true; 5842 hci_run(); 5843 } 5844 5845 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5846 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5847 } 5848 5849 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5850 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5851 if (!conn){ 5852 // disallow if le connection is already outgoing 5853 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5854 log_error("le connection already active"); 5855 return ERROR_CODE_COMMAND_DISALLOWED; 5856 } 5857 5858 log_info("gap_connect: no connection exists yet, creating context"); 5859 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5860 if (!conn){ 5861 // notify client that alloc failed 5862 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5863 log_info("gap_connect: failed to alloc hci_connection_t"); 5864 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5865 } 5866 5867 // set le connecting state 5868 if (hci_is_le_connection_type(addr_type)){ 5869 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5870 } 5871 5872 conn->state = SEND_CREATE_CONNECTION; 5873 log_info("gap_connect: send create connection next"); 5874 hci_run(); 5875 return ERROR_CODE_SUCCESS; 5876 } 5877 5878 if (!hci_is_le_connection(conn) || 5879 (conn->state == SEND_CREATE_CONNECTION) || 5880 (conn->state == SENT_CREATE_CONNECTION)) { 5881 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5882 log_error("gap_connect: classic connection or connect is already being created"); 5883 return GATT_CLIENT_IN_WRONG_STATE; 5884 } 5885 5886 // check if connection was just disconnected 5887 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5888 log_info("gap_connect: send create connection (again)"); 5889 conn->state = SEND_CREATE_CONNECTION; 5890 hci_run(); 5891 return ERROR_CODE_SUCCESS; 5892 } 5893 5894 log_info("gap_connect: context exists with state %u", conn->state); 5895 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5896 hci_run(); 5897 return ERROR_CODE_SUCCESS; 5898 } 5899 5900 // @assumption: only a single outgoing LE Connection exists 5901 static hci_connection_t * gap_get_outgoing_connection(void){ 5902 btstack_linked_item_t *it; 5903 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5904 hci_connection_t * conn = (hci_connection_t *) it; 5905 if (!hci_is_le_connection(conn)) continue; 5906 switch (conn->state){ 5907 case SEND_CREATE_CONNECTION: 5908 case SENT_CREATE_CONNECTION: 5909 case SENT_CANCEL_CONNECTION: 5910 return conn; 5911 default: 5912 break; 5913 }; 5914 } 5915 return NULL; 5916 } 5917 5918 uint8_t gap_connect_cancel(void){ 5919 hci_connection_t * conn = gap_get_outgoing_connection(); 5920 if (!conn) return 0; 5921 switch (conn->state){ 5922 case SEND_CREATE_CONNECTION: 5923 // skip sending create connection and emit event instead 5924 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5925 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5926 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5927 btstack_memory_hci_connection_free( conn ); 5928 break; 5929 case SENT_CREATE_CONNECTION: 5930 // request to send cancel connection 5931 conn->state = SEND_CANCEL_CONNECTION; 5932 hci_run(); 5933 break; 5934 default: 5935 break; 5936 } 5937 return 0; 5938 } 5939 #endif 5940 5941 #ifdef ENABLE_LE_CENTRAL 5942 /** 5943 * @brief Set connection parameters for outgoing connections 5944 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5945 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5946 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5947 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5948 * @param conn_latency, default: 4 5949 * @param supervision_timeout (unit: 10ms), default: 720 ms 5950 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5951 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5952 */ 5953 5954 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5955 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5956 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5957 hci_stack->le_connection_scan_interval = conn_scan_interval; 5958 hci_stack->le_connection_scan_window = conn_scan_window; 5959 hci_stack->le_connection_interval_min = conn_interval_min; 5960 hci_stack->le_connection_interval_max = conn_interval_max; 5961 hci_stack->le_connection_latency = conn_latency; 5962 hci_stack->le_supervision_timeout = supervision_timeout; 5963 hci_stack->le_minimum_ce_length = min_ce_length; 5964 hci_stack->le_maximum_ce_length = max_ce_length; 5965 } 5966 #endif 5967 5968 /** 5969 * @brief Updates the connection parameters for a given LE connection 5970 * @param handle 5971 * @param conn_interval_min (unit: 1.25ms) 5972 * @param conn_interval_max (unit: 1.25ms) 5973 * @param conn_latency 5974 * @param supervision_timeout (unit: 10ms) 5975 * @returns 0 if ok 5976 */ 5977 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5978 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5979 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5980 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5981 connection->le_conn_interval_min = conn_interval_min; 5982 connection->le_conn_interval_max = conn_interval_max; 5983 connection->le_conn_latency = conn_latency; 5984 connection->le_supervision_timeout = supervision_timeout; 5985 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5986 hci_run(); 5987 return 0; 5988 } 5989 5990 /** 5991 * @brief Request an update of the connection parameter for a given LE connection 5992 * @param handle 5993 * @param conn_interval_min (unit: 1.25ms) 5994 * @param conn_interval_max (unit: 1.25ms) 5995 * @param conn_latency 5996 * @param supervision_timeout (unit: 10ms) 5997 * @returns 0 if ok 5998 */ 5999 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6000 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6001 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6002 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6003 connection->le_conn_interval_min = conn_interval_min; 6004 connection->le_conn_interval_max = conn_interval_max; 6005 connection->le_conn_latency = conn_latency; 6006 connection->le_supervision_timeout = supervision_timeout; 6007 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6008 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6009 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6010 return 0; 6011 } 6012 6013 #ifdef ENABLE_LE_PERIPHERAL 6014 6015 /** 6016 * @brief Set Advertisement Data 6017 * @param advertising_data_length 6018 * @param advertising_data (max 31 octets) 6019 * @note data is not copied, pointer has to stay valid 6020 */ 6021 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6022 hci_stack->le_advertisements_data_len = advertising_data_length; 6023 hci_stack->le_advertisements_data = advertising_data; 6024 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6025 hci_run(); 6026 } 6027 6028 /** 6029 * @brief Set Scan Response Data 6030 * @param advertising_data_length 6031 * @param advertising_data (max 31 octets) 6032 * @note data is not copied, pointer has to stay valid 6033 */ 6034 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6035 hci_stack->le_scan_response_data_len = scan_response_data_length; 6036 hci_stack->le_scan_response_data = scan_response_data; 6037 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6038 hci_run(); 6039 } 6040 6041 /** 6042 * @brief Set Advertisement Parameters 6043 * @param adv_int_min 6044 * @param adv_int_max 6045 * @param adv_type 6046 * @param direct_address_type 6047 * @param direct_address 6048 * @param channel_map 6049 * @param filter_policy 6050 * 6051 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6052 */ 6053 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6054 uint8_t direct_address_typ, bd_addr_t direct_address, 6055 uint8_t channel_map, uint8_t filter_policy) { 6056 6057 hci_stack->le_advertisements_interval_min = adv_int_min; 6058 hci_stack->le_advertisements_interval_max = adv_int_max; 6059 hci_stack->le_advertisements_type = adv_type; 6060 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6061 hci_stack->le_advertisements_channel_map = channel_map; 6062 hci_stack->le_advertisements_filter_policy = filter_policy; 6063 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6064 6); 6065 6066 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6067 hci_run(); 6068 } 6069 6070 /** 6071 * @brief Enable/Disable Advertisements 6072 * @param enabled 6073 */ 6074 void gap_advertisements_enable(int enabled){ 6075 hci_stack->le_advertisements_enabled = enabled != 0; 6076 hci_update_advertisements_enabled_for_current_roles(); 6077 hci_run(); 6078 } 6079 6080 #endif 6081 6082 void hci_le_set_own_address_type(uint8_t own_address_type){ 6083 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6084 if (own_address_type == hci_stack->le_own_addr_type) return; 6085 hci_stack->le_own_addr_type = own_address_type; 6086 6087 #ifdef ENABLE_LE_PERIPHERAL 6088 // update advertisement parameters, too 6089 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6090 hci_run(); 6091 #endif 6092 #ifdef ENABLE_LE_CENTRAL 6093 // note: we don't update scan parameters or modify ongoing connection attempts 6094 #endif 6095 } 6096 6097 #endif 6098 6099 uint8_t gap_disconnect(hci_con_handle_t handle){ 6100 hci_connection_t * conn = hci_connection_for_handle(handle); 6101 if (!conn){ 6102 hci_emit_disconnection_complete(handle, 0); 6103 return 0; 6104 } 6105 // ignore if already disconnected 6106 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6107 return 0; 6108 } 6109 conn->state = SEND_DISCONNECT; 6110 hci_run(); 6111 return 0; 6112 } 6113 6114 int gap_read_rssi(hci_con_handle_t con_handle){ 6115 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6116 if (hci_connection == NULL) return 0; 6117 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6118 hci_run(); 6119 return 1; 6120 } 6121 6122 /** 6123 * @brief Get connection type 6124 * @param con_handle 6125 * @result connection_type 6126 */ 6127 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6128 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6129 if (!conn) return GAP_CONNECTION_INVALID; 6130 switch (conn->address_type){ 6131 case BD_ADDR_TYPE_LE_PUBLIC: 6132 case BD_ADDR_TYPE_LE_RANDOM: 6133 return GAP_CONNECTION_LE; 6134 case BD_ADDR_TYPE_SCO: 6135 return GAP_CONNECTION_SCO; 6136 case BD_ADDR_TYPE_ACL: 6137 return GAP_CONNECTION_ACL; 6138 default: 6139 return GAP_CONNECTION_INVALID; 6140 } 6141 } 6142 6143 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6144 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6145 if (!conn) return HCI_ROLE_INVALID; 6146 return (hci_role_t) conn->role; 6147 } 6148 6149 6150 #ifdef ENABLE_CLASSIC 6151 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6152 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6153 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6154 conn->request_role = role; 6155 hci_run(); 6156 return ERROR_CODE_SUCCESS; 6157 } 6158 #endif 6159 6160 #ifdef ENABLE_BLE 6161 6162 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){ 6163 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6164 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6165 6166 conn->le_phy_update_all_phys = all_phys; 6167 conn->le_phy_update_tx_phys = tx_phys; 6168 conn->le_phy_update_rx_phys = rx_phys; 6169 conn->le_phy_update_phy_options = phy_options; 6170 6171 hci_run(); 6172 6173 return 0; 6174 } 6175 6176 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6177 // check if already in list 6178 btstack_linked_list_iterator_t it; 6179 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6180 while (btstack_linked_list_iterator_has_next(&it)) { 6181 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6182 if (entry->address_type != address_type) { 6183 continue; 6184 } 6185 if (memcmp(entry->address, address, 6) != 0) { 6186 continue; 6187 } 6188 // disallow if already scheduled to add 6189 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6190 return ERROR_CODE_COMMAND_DISALLOWED; 6191 } 6192 // still on controller, but scheduled to remove -> re-add 6193 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6194 return ERROR_CODE_SUCCESS; 6195 } 6196 // alloc and add to list 6197 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6198 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6199 entry->address_type = address_type; 6200 (void)memcpy(entry->address, address, 6); 6201 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6202 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6203 return ERROR_CODE_SUCCESS; 6204 } 6205 6206 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6207 btstack_linked_list_iterator_t it; 6208 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6209 while (btstack_linked_list_iterator_has_next(&it)){ 6210 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6211 if (entry->address_type != address_type) { 6212 continue; 6213 } 6214 if (memcmp(entry->address, address, 6) != 0) { 6215 continue; 6216 } 6217 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6218 // remove from controller if already present 6219 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6220 } else { 6221 // directly remove entry from whitelist 6222 btstack_linked_list_iterator_remove(&it); 6223 btstack_memory_whitelist_entry_free(entry); 6224 } 6225 return ERROR_CODE_SUCCESS; 6226 } 6227 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6228 } 6229 6230 static void hci_whitelist_clear(void){ 6231 btstack_linked_list_iterator_t it; 6232 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6233 while (btstack_linked_list_iterator_has_next(&it)){ 6234 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6235 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6236 // remove from controller if already present 6237 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6238 continue; 6239 } 6240 // directly remove entry from whitelist 6241 btstack_linked_list_iterator_remove(&it); 6242 btstack_memory_whitelist_entry_free(entry); 6243 } 6244 } 6245 6246 /** 6247 * @brief Clear Whitelist 6248 * @returns 0 if ok 6249 */ 6250 uint8_t gap_whitelist_clear(void){ 6251 hci_whitelist_clear(); 6252 hci_run(); 6253 return ERROR_CODE_SUCCESS; 6254 } 6255 6256 /** 6257 * @brief Add Device to Whitelist 6258 * @param address_typ 6259 * @param address 6260 * @returns 0 if ok 6261 */ 6262 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6263 uint8_t status = hci_whitelist_add(address_type, address); 6264 if (status){ 6265 return status; 6266 } 6267 hci_run(); 6268 return ERROR_CODE_SUCCESS; 6269 } 6270 6271 /** 6272 * @brief Remove Device from Whitelist 6273 * @param address_typ 6274 * @param address 6275 * @returns 0 if ok 6276 */ 6277 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6278 uint8_t status = hci_whitelist_remove(address_type, address); 6279 if (status){ 6280 return status; 6281 } 6282 hci_run(); 6283 return ERROR_CODE_SUCCESS; 6284 } 6285 6286 #ifdef ENABLE_LE_CENTRAL 6287 /** 6288 * @brief Connect with Whitelist 6289 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6290 * @returns - if ok 6291 */ 6292 uint8_t gap_connect_with_whitelist(void){ 6293 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6294 return ERROR_CODE_COMMAND_DISALLOWED; 6295 } 6296 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6297 hci_run(); 6298 return ERROR_CODE_SUCCESS; 6299 } 6300 6301 /** 6302 * @brief Auto Connection Establishment - Start Connecting to device 6303 * @param address_typ 6304 * @param address 6305 * @returns 0 if ok 6306 */ 6307 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6308 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6309 return ERROR_CODE_COMMAND_DISALLOWED; 6310 } 6311 6312 uint8_t status = hci_whitelist_add(address_type, address); 6313 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6314 return status; 6315 } 6316 6317 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6318 6319 hci_run(); 6320 return ERROR_CODE_SUCCESS; 6321 } 6322 6323 /** 6324 * @brief Auto Connection Establishment - Stop Connecting to device 6325 * @param address_typ 6326 * @param address 6327 * @returns 0 if ok 6328 */ 6329 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6330 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6331 return ERROR_CODE_COMMAND_DISALLOWED; 6332 } 6333 6334 hci_whitelist_remove(address_type, address); 6335 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6336 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6337 } 6338 hci_run(); 6339 return 0; 6340 } 6341 6342 /** 6343 * @brief Auto Connection Establishment - Stop everything 6344 * @note Convenience function to stop all active auto connection attempts 6345 */ 6346 uint8_t gap_auto_connection_stop_all(void){ 6347 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6348 return ERROR_CODE_COMMAND_DISALLOWED; 6349 } 6350 hci_whitelist_clear(); 6351 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6352 hci_run(); 6353 return ERROR_CODE_SUCCESS; 6354 } 6355 6356 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6357 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6358 if (!conn) return 0; 6359 return conn->le_connection_interval; 6360 } 6361 #endif 6362 #endif 6363 6364 #ifdef ENABLE_CLASSIC 6365 /** 6366 * @brief Set Extended Inquiry Response data 6367 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6368 * @note has to be done before stack starts up 6369 */ 6370 void gap_set_extended_inquiry_response(const uint8_t * data){ 6371 hci_stack->eir_data = data; 6372 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6373 hci_run(); 6374 } 6375 6376 /** 6377 * @brief Start GAP Classic Inquiry 6378 * @param duration in 1.28s units 6379 * @return 0 if ok 6380 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6381 */ 6382 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6383 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6384 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6385 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6386 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6387 } 6388 hci_stack->inquiry_state = duration_in_1280ms_units; 6389 hci_run(); 6390 return 0; 6391 } 6392 6393 /** 6394 * @brief Stop GAP Classic Inquiry 6395 * @returns 0 if ok 6396 */ 6397 int gap_inquiry_stop(void){ 6398 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6399 // emit inquiry complete event, before it even started 6400 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6401 hci_emit_event(event, sizeof(event), 1); 6402 return 0; 6403 } 6404 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6405 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6406 hci_run(); 6407 return 0; 6408 } 6409 6410 void gap_inquiry_set_lap(uint32_t lap){ 6411 hci_stack->inquiry_lap = lap; 6412 } 6413 6414 6415 /** 6416 * @brief Remote Name Request 6417 * @param addr 6418 * @param page_scan_repetition_mode 6419 * @param clock_offset only used when bit 15 is set 6420 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6421 */ 6422 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6423 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6424 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6425 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6426 hci_stack->remote_name_clock_offset = clock_offset; 6427 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6428 hci_run(); 6429 return 0; 6430 } 6431 6432 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6433 hci_stack->gap_pairing_state = state; 6434 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6435 hci_run(); 6436 return 0; 6437 } 6438 6439 /** 6440 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6441 * @param addr 6442 * @param pin_data 6443 * @param pin_len 6444 * @return 0 if ok 6445 */ 6446 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6447 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6448 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6449 hci_stack->gap_pairing_pin_len = pin_len; 6450 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6451 } 6452 6453 /** 6454 * @brief Legacy Pairing Pin Code Response 6455 * @param addr 6456 * @param pin 6457 * @return 0 if ok 6458 */ 6459 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6460 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6461 } 6462 6463 /** 6464 * @brief Abort Legacy Pairing 6465 * @param addr 6466 * @param pin 6467 * @return 0 if ok 6468 */ 6469 int gap_pin_code_negative(bd_addr_t addr){ 6470 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6471 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6472 } 6473 6474 /** 6475 * @brief SSP Passkey Response 6476 * @param addr 6477 * @param passkey 6478 * @return 0 if ok 6479 */ 6480 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6481 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6482 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6483 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6484 } 6485 6486 /** 6487 * @brief Abort SSP Passkey Entry/Pairing 6488 * @param addr 6489 * @param pin 6490 * @return 0 if ok 6491 */ 6492 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6493 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6494 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6495 } 6496 6497 /** 6498 * @brief Accept SSP Numeric Comparison 6499 * @param addr 6500 * @param passkey 6501 * @return 0 if ok 6502 */ 6503 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6504 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6505 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6506 } 6507 6508 /** 6509 * @brief Abort SSP Numeric Comparison/Pairing 6510 * @param addr 6511 * @param pin 6512 * @return 0 if ok 6513 */ 6514 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6515 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6516 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6517 } 6518 6519 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6520 6521 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6522 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6523 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6524 connectionSetAuthenticationFlags(conn, flag); 6525 hci_run(); 6526 return ERROR_CODE_SUCCESS; 6527 } 6528 6529 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6530 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6531 } 6532 6533 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6534 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6535 } 6536 #endif 6537 6538 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6539 /** 6540 * @brief Report Remote OOB Data 6541 * @param bd_addr 6542 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6543 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6544 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6545 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6546 */ 6547 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){ 6548 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6549 if (connection == NULL) { 6550 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6551 } 6552 connection->classic_oob_c_192 = c_192; 6553 connection->classic_oob_r_192 = r_192; 6554 6555 // ignore P-256 if not supported by us 6556 if (hci_stack->secure_connections_active){ 6557 connection->classic_oob_c_256 = c_256; 6558 connection->classic_oob_r_256 = r_256; 6559 } 6560 6561 return ERROR_CODE_SUCCESS; 6562 } 6563 /** 6564 * @brief Generate new OOB data 6565 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6566 */ 6567 void gap_ssp_generate_oob_data(void){ 6568 hci_stack->classic_read_local_oob_data = true; 6569 hci_run(); 6570 } 6571 6572 #endif 6573 6574 /** 6575 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6576 * @param inquiry_mode see bluetooth_defines.h 6577 */ 6578 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6579 hci_stack->inquiry_mode = inquiry_mode; 6580 } 6581 6582 /** 6583 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6584 */ 6585 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6586 hci_stack->sco_voice_setting = voice_setting; 6587 } 6588 6589 /** 6590 * @brief Get SCO Voice Setting 6591 * @return current voice setting 6592 */ 6593 uint16_t hci_get_sco_voice_setting(void){ 6594 return hci_stack->sco_voice_setting; 6595 } 6596 6597 static int hci_have_usb_transport(void){ 6598 if (!hci_stack->hci_transport) return 0; 6599 const char * transport_name = hci_stack->hci_transport->name; 6600 if (!transport_name) return 0; 6601 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6602 } 6603 6604 /** @brief Get SCO packet length for current SCO Voice setting 6605 * @note Using SCO packets of the exact length is required for USB transfer 6606 * @return Length of SCO packets in bytes (not audio frames) 6607 */ 6608 uint16_t hci_get_sco_packet_length(void){ 6609 uint16_t sco_packet_length = 0; 6610 6611 #ifdef ENABLE_SCO_OVER_HCI 6612 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6613 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6614 6615 if (hci_have_usb_transport()){ 6616 // see Core Spec for H2 USB Transfer. 6617 // 3 byte SCO header + 24 bytes per connection 6618 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6619 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6620 } else { 6621 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6622 sco_packet_length = 3 + 60 * multiplier; 6623 // assert that it still fits inside an SCO buffer 6624 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6625 sco_packet_length = 3 + 60; 6626 } 6627 } 6628 #endif 6629 6630 #ifdef HAVE_SCO_TRANSPORT 6631 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6632 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6633 sco_packet_length = 3 + 60 * multiplier; 6634 #endif 6635 return sco_packet_length; 6636 } 6637 6638 /** 6639 * @brief Sets the master/slave policy 6640 * @param policy (0: attempt to become master, 1: let connecting device decide) 6641 */ 6642 void hci_set_master_slave_policy(uint8_t policy){ 6643 hci_stack->master_slave_policy = policy; 6644 } 6645 6646 #endif 6647 6648 HCI_STATE hci_get_state(void){ 6649 return hci_stack->state; 6650 } 6651 6652 #ifdef ENABLE_CLASSIC 6653 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6654 hci_stack->gap_classic_accept_callback = accept_callback; 6655 } 6656 #endif 6657 6658 /** 6659 * @brief Set callback for Bluetooth Hardware Error 6660 */ 6661 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6662 hci_stack->hardware_error_callback = fn; 6663 } 6664 6665 void hci_disconnect_all(void){ 6666 btstack_linked_list_iterator_t it; 6667 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6668 while (btstack_linked_list_iterator_has_next(&it)){ 6669 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6670 if (con->state == SENT_DISCONNECT) continue; 6671 con->state = SEND_DISCONNECT; 6672 } 6673 hci_run(); 6674 } 6675 6676 uint16_t hci_get_manufacturer(void){ 6677 return hci_stack->manufacturer; 6678 } 6679 6680 #ifdef ENABLE_BLE 6681 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6682 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6683 if (!hci_con) return NULL; 6684 return &hci_con->sm_connection; 6685 } 6686 6687 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6688 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6689 #endif 6690 6691 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6692 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6693 if (hci_connection == NULL) return 0; 6694 if (hci_is_le_connection(hci_connection)){ 6695 #ifdef ENABLE_BLE 6696 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6697 if (sm_conn->sm_connection_encrypted) { 6698 return sm_conn->sm_actual_encryption_key_size; 6699 } 6700 #endif 6701 } else { 6702 #ifdef ENABLE_CLASSIC 6703 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6704 return hci_connection->encryption_key_size; 6705 } 6706 #endif 6707 } 6708 return 0; 6709 } 6710 6711 int gap_authenticated(hci_con_handle_t con_handle){ 6712 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6713 if (hci_connection == NULL) return 0; 6714 6715 switch (hci_connection->address_type){ 6716 #ifdef ENABLE_BLE 6717 case BD_ADDR_TYPE_LE_PUBLIC: 6718 case BD_ADDR_TYPE_LE_RANDOM: 6719 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6720 return hci_connection->sm_connection.sm_connection_authenticated; 6721 #endif 6722 #ifdef ENABLE_CLASSIC 6723 case BD_ADDR_TYPE_SCO: 6724 case BD_ADDR_TYPE_ACL: 6725 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6726 #endif 6727 default: 6728 return 0; 6729 } 6730 } 6731 6732 int gap_secure_connection(hci_con_handle_t con_handle){ 6733 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6734 if (hci_connection == NULL) return 0; 6735 6736 switch (hci_connection->address_type){ 6737 #ifdef ENABLE_BLE 6738 case BD_ADDR_TYPE_LE_PUBLIC: 6739 case BD_ADDR_TYPE_LE_RANDOM: 6740 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6741 return hci_connection->sm_connection.sm_connection_sc; 6742 #endif 6743 #ifdef ENABLE_CLASSIC 6744 case BD_ADDR_TYPE_SCO: 6745 case BD_ADDR_TYPE_ACL: 6746 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6747 #endif 6748 default: 6749 return 0; 6750 } 6751 } 6752 6753 bool gap_bonded(hci_con_handle_t con_handle){ 6754 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6755 if (hci_connection == NULL) return 0; 6756 6757 #ifdef ENABLE_CLASSIC 6758 link_key_t link_key; 6759 link_key_type_t link_key_type; 6760 #endif 6761 switch (hci_connection->address_type){ 6762 #ifdef ENABLE_BLE 6763 case BD_ADDR_TYPE_LE_PUBLIC: 6764 case BD_ADDR_TYPE_LE_RANDOM: 6765 return hci_connection->sm_connection.sm_le_db_index >= 0; 6766 #endif 6767 #ifdef ENABLE_CLASSIC 6768 case BD_ADDR_TYPE_SCO: 6769 case BD_ADDR_TYPE_ACL: 6770 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6771 #endif 6772 default: 6773 return false; 6774 } 6775 } 6776 6777 #ifdef ENABLE_BLE 6778 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6779 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6780 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6781 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6782 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6783 return sm_conn->sm_connection_authorization_state; 6784 } 6785 #endif 6786 6787 #ifdef ENABLE_CLASSIC 6788 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){ 6789 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6790 if (!conn) return GAP_CONNECTION_INVALID; 6791 conn->sniff_min_interval = sniff_min_interval; 6792 conn->sniff_max_interval = sniff_max_interval; 6793 conn->sniff_attempt = sniff_attempt; 6794 conn->sniff_timeout = sniff_timeout; 6795 hci_run(); 6796 return 0; 6797 } 6798 6799 /** 6800 * @brief Exit Sniff mode 6801 * @param con_handle 6802 @ @return 0 if ok 6803 */ 6804 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6805 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6806 if (!conn) return GAP_CONNECTION_INVALID; 6807 conn->sniff_min_interval = 0xffff; 6808 hci_run(); 6809 return 0; 6810 } 6811 6812 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){ 6813 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6814 if (!conn) return GAP_CONNECTION_INVALID; 6815 conn->sniff_subrating_max_latency = max_latency; 6816 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6817 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6818 hci_run(); 6819 return ERROR_CODE_SUCCESS; 6820 } 6821 6822 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){ 6823 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6824 if (!conn) return GAP_CONNECTION_INVALID; 6825 conn->qos_service_type = service_type; 6826 conn->qos_token_rate = token_rate; 6827 conn->qos_peak_bandwidth = peak_bandwidth; 6828 conn->qos_latency = latency; 6829 conn->qos_delay_variation = delay_variation; 6830 hci_run(); 6831 return ERROR_CODE_SUCCESS; 6832 } 6833 6834 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6835 hci_stack->new_page_scan_interval = page_scan_interval; 6836 hci_stack->new_page_scan_window = page_scan_window; 6837 hci_run(); 6838 } 6839 6840 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6841 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6842 hci_run(); 6843 } 6844 6845 #endif 6846 6847 void hci_halting_defer(void){ 6848 if (hci_stack->state != HCI_STATE_HALTING) return; 6849 switch (hci_stack->substate){ 6850 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6851 case HCI_HALTING_CLOSE: 6852 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6853 break; 6854 default: 6855 break; 6856 } 6857 } 6858 6859 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6860 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6861 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6862 if (le_device_db_index >= le_device_db_max_count()) return; 6863 uint8_t offset = le_device_db_index >> 3; 6864 uint8_t mask = 1 << (le_device_db_index & 7); 6865 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6866 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6867 // note: go back to remove entries, otherwise, a remove + add will skip the add 6868 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6869 } 6870 } 6871 6872 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6873 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6874 if (le_device_db_index >= le_device_db_max_count()) return; 6875 uint8_t offset = le_device_db_index >> 3; 6876 uint8_t mask = 1 << (le_device_db_index & 7); 6877 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6878 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6879 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6880 } 6881 } 6882 6883 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6884 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6885 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6886 } 6887 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6888 // restart le resolving list update 6889 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6890 } 6891 return ERROR_CODE_SUCCESS; 6892 } 6893 #endif 6894 6895 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6896 void hci_setup_test_connections_fuzz(void){ 6897 hci_connection_t * conn; 6898 6899 // default address: 66:55:44:33:00:01 6900 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6901 6902 // setup Controller info 6903 hci_stack->num_cmd_packets = 255; 6904 hci_stack->acl_packets_total_num = 255; 6905 6906 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6907 addr[5] = 0x01; 6908 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6909 conn->con_handle = addr[5]; 6910 conn->role = HCI_ROLE_SLAVE; 6911 conn->state = RECEIVED_CONNECTION_REQUEST; 6912 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6913 6914 // setup incoming Classic SCO connection with con handle 0x0002 6915 addr[5] = 0x02; 6916 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6917 conn->con_handle = addr[5]; 6918 conn->role = HCI_ROLE_SLAVE; 6919 conn->state = RECEIVED_CONNECTION_REQUEST; 6920 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6921 6922 // setup ready Classic ACL connection with con handle 0x0003 6923 addr[5] = 0x03; 6924 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6925 conn->con_handle = addr[5]; 6926 conn->role = HCI_ROLE_SLAVE; 6927 conn->state = OPEN; 6928 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6929 6930 // setup ready Classic SCO connection with con handle 0x0004 6931 addr[5] = 0x04; 6932 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6933 conn->con_handle = addr[5]; 6934 conn->role = HCI_ROLE_SLAVE; 6935 conn->state = OPEN; 6936 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6937 6938 // setup ready LE ACL connection with con handle 0x005 and public address 6939 addr[5] = 0x05; 6940 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6941 conn->con_handle = addr[5]; 6942 conn->role = HCI_ROLE_SLAVE; 6943 conn->state = OPEN; 6944 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6945 conn->sm_connection.sm_connection_encrypted = 1; 6946 } 6947 6948 void hci_free_connections_fuzz(void){ 6949 btstack_linked_list_iterator_t it; 6950 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6951 while (btstack_linked_list_iterator_has_next(&it)){ 6952 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6953 btstack_linked_list_iterator_remove(&it); 6954 btstack_memory_hci_connection_free(con); 6955 } 6956 } 6957 void hci_simulate_working_fuzz(void){ 6958 hci_init_done(); 6959 hci_stack->num_cmd_packets = 255; 6960 } 6961 #endif 6962