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