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 #ifndef HAVE_HOST_CONTROLLER_API 1438 bool need_baud_change = hci_stack->config 1439 && hci_stack->chipset 1440 && hci_stack->chipset->set_baudrate_command 1441 && hci_stack->hci_transport->set_baudrate 1442 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1443 #endif 1444 1445 switch (hci_stack->substate){ 1446 case HCI_INIT_SEND_RESET: 1447 hci_state_reset(); 1448 1449 #ifndef HAVE_HOST_CONTROLLER_API 1450 // prepare reset if command complete not received in 100ms 1451 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1452 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1453 btstack_run_loop_add_timer(&hci_stack->timeout); 1454 #endif 1455 // send command 1456 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1457 hci_send_cmd(&hci_reset); 1458 break; 1459 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1460 hci_send_cmd(&hci_read_local_version_information); 1461 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1462 break; 1463 1464 #ifndef HAVE_HOST_CONTROLLER_API 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 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1470 hci_state_reset(); 1471 // prepare reset if command complete not received in 100ms 1472 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1473 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1474 btstack_run_loop_add_timer(&hci_stack->timeout); 1475 // send command 1476 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1477 hci_send_cmd(&hci_reset); 1478 break; 1479 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1480 hci_state_reset(); 1481 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1482 hci_send_cmd(&hci_reset); 1483 break; 1484 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1485 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1486 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1487 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1488 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1489 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1490 break; 1491 } 1492 case HCI_INIT_SET_BD_ADDR: 1493 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1494 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1495 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1496 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1497 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1498 break; 1499 case HCI_INIT_SEND_BAUD_CHANGE: 1500 if (need_baud_change) { 1501 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1502 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1503 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1504 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1505 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1506 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1507 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1508 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1509 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1510 btstack_run_loop_add_timer(&hci_stack->timeout); 1511 } 1512 break; 1513 } 1514 1515 /* fall through */ 1516 1517 case HCI_INIT_CUSTOM_INIT: 1518 // Custom initialization 1519 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1520 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1521 bool send_cmd = false; 1522 switch (hci_stack->chipset_result){ 1523 case BTSTACK_CHIPSET_VALID_COMMAND: 1524 send_cmd = true; 1525 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1526 break; 1527 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1528 send_cmd = true; 1529 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1530 log_info("CSR Warm Boot"); 1531 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1532 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1533 btstack_run_loop_add_timer(&hci_stack->timeout); 1534 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1535 && hci_stack->config 1536 && hci_stack->chipset 1537 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1538 && hci_stack->hci_transport->set_baudrate 1539 && hci_transport_uart_get_main_baud_rate()){ 1540 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1541 } else { 1542 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1543 } 1544 break; 1545 default: 1546 break; 1547 } 1548 1549 if (send_cmd){ 1550 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1551 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1552 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1553 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1554 break; 1555 } 1556 log_info("Init script done"); 1557 1558 // Init script download on Broadcom chipsets causes: 1559 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1560 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1561 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1562 1563 // - baud rate to reset, restore UART baud rate if needed 1564 if (need_baud_change) { 1565 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1566 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1567 hci_stack->hci_transport->set_baudrate(baud_rate); 1568 } 1569 1570 uint16_t bcm_delay_ms = 300; 1571 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1572 // -> Work around: wait here. 1573 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1574 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1575 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1576 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1577 btstack_run_loop_add_timer(&hci_stack->timeout); 1578 break; 1579 } 1580 } 1581 #endif 1582 /* fall through */ 1583 1584 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1585 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1586 hci_send_cmd(&hci_read_local_supported_commands); 1587 break; 1588 case HCI_INIT_READ_BD_ADDR: 1589 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1590 hci_send_cmd(&hci_read_bd_addr); 1591 break; 1592 case HCI_INIT_READ_BUFFER_SIZE: 1593 // only read buffer size if supported 1594 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1595 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1596 hci_send_cmd(&hci_read_buffer_size); 1597 break; 1598 } 1599 1600 /* fall through */ 1601 1602 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1603 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1604 hci_send_cmd(&hci_read_local_supported_features); 1605 break; 1606 1607 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1608 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1609 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1610 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1611 break; 1612 case HCI_INIT_HOST_BUFFER_SIZE: 1613 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1614 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1615 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1616 break; 1617 #endif 1618 1619 case HCI_INIT_SET_EVENT_MASK: 1620 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1621 if (hci_le_supported()){ 1622 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1623 } else { 1624 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1625 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1626 } 1627 break; 1628 1629 #ifdef ENABLE_CLASSIC 1630 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1631 if (hci_classic_supported() && gap_ssp_supported()){ 1632 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1633 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1634 break; 1635 } 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 1646 /* fall through */ 1647 1648 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1649 // skip write secure connections host support if not supported or disabled 1650 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1651 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1652 hci_stack->secure_connections_active = true; 1653 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1654 break; 1655 } 1656 1657 /* fall through */ 1658 1659 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1660 if (hci_classic_supported()){ 1661 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1662 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1663 break; 1664 } 1665 1666 #ifdef ENABLE_SCO_OVER_HCI 1667 /* fall through */ 1668 1669 // only sent if ENABLE_SCO_OVER_HCI is defined 1670 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1671 // skip write synchronous flow control if not supported 1672 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1673 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1674 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1675 break; 1676 } 1677 /* fall through */ 1678 1679 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1680 // skip write default erroneous data reporting if not supported 1681 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1682 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1683 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1684 break; 1685 } 1686 #endif 1687 1688 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1689 /* fall through */ 1690 1691 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1692 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1693 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1694 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1695 #ifdef ENABLE_SCO_OVER_HCI 1696 log_info("BCM: Route SCO data via HCI transport"); 1697 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1698 #endif 1699 #ifdef ENABLE_SCO_OVER_PCM 1700 log_info("BCM: Route SCO data via PCM interface"); 1701 #ifdef ENABLE_BCM_PCM_WBS 1702 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1703 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1704 #else 1705 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1706 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1707 #endif 1708 #endif 1709 break; 1710 } 1711 #endif 1712 1713 #ifdef ENABLE_SCO_OVER_PCM 1714 /* fall through */ 1715 1716 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1717 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1718 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1719 log_info("BCM: Config PCM interface for I2S"); 1720 #ifdef ENABLE_BCM_PCM_WBS 1721 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1722 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1723 #else 1724 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1725 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1726 #endif 1727 break; 1728 } 1729 #endif 1730 #endif 1731 1732 #ifdef ENABLE_BLE 1733 /* fall through */ 1734 1735 // LE INIT 1736 case HCI_INIT_LE_READ_BUFFER_SIZE: 1737 if (hci_le_supported()){ 1738 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1739 hci_send_cmd(&hci_le_read_buffer_size); 1740 break; 1741 } 1742 1743 /* fall through */ 1744 1745 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1746 // skip write le host if not supported (e.g. on LE only EM9301) 1747 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1748 // LE Supported Host = 1, Simultaneous Host = 0 1749 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1750 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1751 break; 1752 } 1753 1754 /* fall through */ 1755 1756 case HCI_INIT_LE_SET_EVENT_MASK: 1757 if (hci_le_supported()){ 1758 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1759 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1760 break; 1761 } 1762 #endif 1763 1764 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1765 /* fall through */ 1766 1767 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1768 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1769 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1770 hci_send_cmd(&hci_le_read_maximum_data_length); 1771 break; 1772 } 1773 1774 /* fall through */ 1775 1776 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1777 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1778 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1779 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1780 break; 1781 } 1782 #endif 1783 1784 #ifdef ENABLE_LE_CENTRAL 1785 /* fall through */ 1786 1787 case HCI_INIT_READ_WHITE_LIST_SIZE: 1788 if (hci_le_supported()){ 1789 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1790 hci_send_cmd(&hci_le_read_white_list_size); 1791 break; 1792 } 1793 1794 /* fall through */ 1795 1796 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1797 if (hci_le_supported()){ 1798 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1799 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); 1800 break; 1801 } 1802 #endif 1803 1804 /* fall through */ 1805 1806 case HCI_INIT_DONE: 1807 hci_stack->substate = HCI_INIT_DONE; 1808 #ifdef ENABLE_CLASSIC 1809 // init sequence complete, check if GAP Tasks are completed 1810 if (hci_stack->gap_tasks != 0) { 1811 hci_run_gap_tasks_classic(); 1812 break; 1813 } 1814 #endif 1815 hci_init_done(); 1816 break; 1817 1818 default: 1819 return; 1820 } 1821 } 1822 1823 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1824 bool command_completed = false; 1825 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1826 uint16_t opcode = little_endian_read_16(packet,3); 1827 if (opcode == hci_stack->last_cmd_opcode){ 1828 command_completed = true; 1829 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1830 } else { 1831 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1832 } 1833 } 1834 1835 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1836 uint8_t status = packet[2]; 1837 uint16_t opcode = little_endian_read_16(packet,4); 1838 if (opcode == hci_stack->last_cmd_opcode){ 1839 if (status){ 1840 command_completed = true; 1841 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1842 } else { 1843 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1844 } 1845 } else { 1846 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1847 } 1848 } 1849 #ifndef HAVE_HOST_CONTROLLER_API 1850 // Vendor == CSR 1851 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1852 // TODO: track actual command 1853 command_completed = true; 1854 } 1855 1856 // Vendor == Toshiba 1857 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1858 // TODO: track actual command 1859 command_completed = true; 1860 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1861 hci_stack->num_cmd_packets = 1; 1862 } 1863 #endif 1864 1865 return command_completed; 1866 } 1867 1868 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1869 1870 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1871 1872 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1873 1874 #ifndef HAVE_HOST_CONTROLLER_API 1875 1876 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1877 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1878 // 1879 // HCI Reset 1880 // Timeout 100 ms 1881 // HCI Reset 1882 // Command Complete Reset 1883 // HCI Read Local Version Information 1884 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1885 // hang... 1886 // 1887 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1888 if (!command_completed 1889 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1890 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1891 1892 uint16_t opcode = little_endian_read_16(packet,3); 1893 if (opcode == hci_reset.opcode){ 1894 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1895 return; 1896 } 1897 } 1898 1899 // CSR & H5 1900 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1901 if (!command_completed 1902 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1903 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1904 1905 uint16_t opcode = little_endian_read_16(packet,3); 1906 if (opcode == hci_reset.opcode){ 1907 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1908 return; 1909 } 1910 } 1911 1912 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1913 // fix: Correct substate and behave as command below 1914 if (command_completed){ 1915 switch (hci_stack->substate){ 1916 case HCI_INIT_SEND_RESET: 1917 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1918 break; 1919 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1920 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1921 break; 1922 default: 1923 break; 1924 } 1925 } 1926 1927 #endif 1928 1929 if (!command_completed) return; 1930 1931 bool need_baud_change = false; 1932 bool need_addr_change = false; 1933 1934 #ifndef HAVE_HOST_CONTROLLER_API 1935 need_baud_change = hci_stack->config 1936 && hci_stack->chipset 1937 && hci_stack->chipset->set_baudrate_command 1938 && hci_stack->hci_transport->set_baudrate 1939 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1940 1941 need_addr_change = hci_stack->custom_bd_addr_set 1942 && hci_stack->chipset 1943 && hci_stack->chipset->set_bd_addr_command; 1944 #endif 1945 1946 switch(hci_stack->substate){ 1947 1948 #ifndef HAVE_HOST_CONTROLLER_API 1949 case HCI_INIT_SEND_RESET: 1950 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1951 // fix: just correct substate and behave as command below 1952 1953 /* fall through */ 1954 #endif 1955 1956 case HCI_INIT_W4_SEND_RESET: 1957 btstack_run_loop_remove_timer(&hci_stack->timeout); 1958 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1959 return; 1960 1961 #ifndef HAVE_HOST_CONTROLLER_API 1962 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1963 // for STLC2500D, baud rate change already happened. 1964 // for others, baud rate gets changed now 1965 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1966 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1967 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1968 hci_stack->hci_transport->set_baudrate(baud_rate); 1969 } 1970 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1971 return; 1972 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1973 btstack_run_loop_remove_timer(&hci_stack->timeout); 1974 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1975 return; 1976 case HCI_INIT_W4_CUSTOM_INIT: 1977 // repeat custom init 1978 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1979 return; 1980 #endif 1981 1982 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1983 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1984 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1985 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1986 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1987 return; 1988 } 1989 if (need_addr_change){ 1990 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1991 return; 1992 } 1993 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1994 return; 1995 #ifndef HAVE_HOST_CONTROLLER_API 1996 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1997 if (need_baud_change){ 1998 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1999 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2000 hci_stack->hci_transport->set_baudrate(baud_rate); 2001 } 2002 if (need_addr_change){ 2003 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2004 return; 2005 } 2006 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2007 return; 2008 case HCI_INIT_W4_SET_BD_ADDR: 2009 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2010 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2011 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2012 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2013 return; 2014 } 2015 // skipping st warm boot 2016 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2017 return; 2018 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2019 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2020 return; 2021 #endif 2022 2023 case HCI_INIT_DONE: 2024 // set state if we came here by fall through 2025 hci_stack->substate = HCI_INIT_DONE; 2026 return; 2027 2028 default: 2029 break; 2030 } 2031 hci_initializing_next_state(); 2032 } 2033 2034 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2035 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2036 bd_addr_t bd_address; 2037 (void)memcpy(&bd_address, conn->address, 6); 2038 2039 #ifdef ENABLE_CLASSIC 2040 // cache needed data 2041 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2042 #endif 2043 2044 // connection failed, remove entry 2045 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2046 btstack_memory_hci_connection_free( conn ); 2047 2048 #ifdef ENABLE_CLASSIC 2049 // notify client if dedicated bonding 2050 if (notify_dedicated_bonding_failed){ 2051 log_info("hci notify_dedicated_bonding_failed"); 2052 hci_emit_dedicated_bonding_result(bd_address, status); 2053 } 2054 2055 // if authentication error, also delete link key 2056 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2057 gap_drop_link_key_for_bd_addr(bd_address); 2058 } 2059 #else 2060 UNUSED(status); 2061 #endif 2062 } 2063 2064 #ifdef ENABLE_CLASSIC 2065 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2066 // SSP Controller 2067 if (features[6] & (1 << 3)){ 2068 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2069 } 2070 // eSCO 2071 if (features[3] & (1<<7)){ 2072 conn->remote_supported_features[0] |= 1; 2073 } 2074 // Extended features 2075 if (features[7] & (1<<7)){ 2076 conn->remote_supported_features[0] |= 2; 2077 } 2078 } 2079 2080 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2081 // SSP Host 2082 if (features[0] & (1 << 0)){ 2083 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2084 } 2085 // SC Host 2086 if (features[0] & (1 << 3)){ 2087 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2088 } 2089 } 2090 2091 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2092 // SC Controller 2093 if (features[1] & (1 << 0)){ 2094 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2095 } 2096 } 2097 2098 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2099 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2100 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2101 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2102 if (conn->bonding_flags & BONDING_DEDICATED){ 2103 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2104 } 2105 } 2106 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2107 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2108 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2109 } 2110 2111 #endif 2112 2113 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2114 // handle BT initialization 2115 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2116 hci_initializing_event_handler(packet, size); 2117 } 2118 2119 // help with BT sleep 2120 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2121 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2122 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2123 hci_initializing_next_state(); 2124 } 2125 } 2126 2127 #ifdef ENABLE_CLASSIC 2128 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2129 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2130 conn->encryption_key_size = encryption_key_size; 2131 2132 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2133 conn->requested_security_level = LEVEL_0; 2134 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2135 return; 2136 } 2137 2138 // Request remote features if not already done 2139 if ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) == 0) { 2140 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2141 } 2142 2143 // Request Authentication if not already done 2144 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2145 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2146 } 2147 #endif 2148 2149 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2150 UNUSED(size); 2151 2152 uint16_t manufacturer; 2153 #ifdef ENABLE_CLASSIC 2154 hci_con_handle_t handle; 2155 hci_connection_t * conn; 2156 uint8_t status; 2157 #endif 2158 // get num cmd packets - limit to 1 to reduce complexity 2159 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2160 2161 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2162 switch (opcode){ 2163 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2164 if (packet[5]) break; 2165 // terminate, name 248 chars 2166 packet[6+248] = 0; 2167 log_info("local name: %s", &packet[6]); 2168 break; 2169 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2170 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2171 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2172 uint16_t acl_len = little_endian_read_16(packet, 6); 2173 uint16_t sco_len = packet[8]; 2174 2175 // determine usable ACL/SCO payload size 2176 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2177 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2178 2179 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2180 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2181 2182 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2183 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2184 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2185 } 2186 break; 2187 case HCI_OPCODE_HCI_READ_RSSI: 2188 if (packet[5] == ERROR_CODE_SUCCESS){ 2189 uint8_t event[5]; 2190 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2191 event[1] = 3; 2192 (void)memcpy(&event[2], &packet[6], 3); 2193 hci_emit_event(event, sizeof(event), 1); 2194 } 2195 break; 2196 #ifdef ENABLE_BLE 2197 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2198 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2199 hci_stack->le_acl_packets_total_num = packet[8]; 2200 // determine usable ACL payload size 2201 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2202 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2203 } 2204 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2205 break; 2206 #endif 2207 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2208 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2209 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2210 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2211 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); 2212 break; 2213 #endif 2214 #ifdef ENABLE_LE_CENTRAL 2215 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2216 hci_stack->le_whitelist_capacity = packet[6]; 2217 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2218 break; 2219 #endif 2220 case HCI_OPCODE_HCI_READ_BD_ADDR: 2221 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2222 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)); 2223 #ifdef ENABLE_CLASSIC 2224 if (hci_stack->link_key_db){ 2225 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2226 } 2227 #endif 2228 break; 2229 #ifdef ENABLE_CLASSIC 2230 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2231 hci_emit_discoverable_enabled(hci_stack->discoverable); 2232 break; 2233 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2234 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2235 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2236 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2237 hci_emit_event(event, sizeof(event), 1); 2238 } 2239 break; 2240 #endif 2241 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2242 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2243 2244 #ifdef ENABLE_CLASSIC 2245 // determine usable ACL packet types based on host buffer size and supported features 2246 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2247 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2248 #endif 2249 // Classic/LE 2250 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2251 break; 2252 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2253 manufacturer = little_endian_read_16(packet, 10); 2254 // map Cypress to Broadcom 2255 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2256 log_info("Treat Cypress as Broadcom"); 2257 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2258 little_endian_store_16(packet, 10, manufacturer); 2259 } 2260 hci_stack->manufacturer = manufacturer; 2261 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2262 break; 2263 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2264 hci_stack->local_supported_commands[0] = 2265 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2266 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2267 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2268 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2269 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2270 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2271 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2273 hci_stack->local_supported_commands[1] = 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2276 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2279 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2280 break; 2281 #ifdef ENABLE_CLASSIC 2282 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2283 if (packet[5]) return; 2284 hci_stack->synchronous_flow_control_enabled = 1; 2285 break; 2286 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2287 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2288 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2289 conn = hci_connection_for_handle(handle); 2290 if (conn != NULL) { 2291 uint8_t key_size = 0; 2292 if (status == 0){ 2293 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2294 log_info("Handle %04x key Size: %u", handle, key_size); 2295 } else { 2296 key_size = 1; 2297 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2298 } 2299 hci_handle_read_encryption_key_size_complete(conn, key_size); 2300 } 2301 break; 2302 // assert pairing complete event is emitted. 2303 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2304 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2305 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2306 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2307 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2308 // lookup connection by gap pairing addr 2309 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2310 if (conn == NULL) break; 2311 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2312 break; 2313 2314 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2315 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2316 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2317 uint8_t event[67]; 2318 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2319 event[1] = 65; 2320 (void)memset(&event[2], 0, 65); 2321 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2322 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2323 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2324 event[2] = 3; 2325 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2326 } else { 2327 event[2] = 1; 2328 } 2329 } 2330 hci_emit_event(event, sizeof(event), 0); 2331 break; 2332 } 2333 2334 // note: only needed if user does not provide OOB data 2335 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2336 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2337 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2338 if (conn == NULL) break; 2339 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2340 break; 2341 #endif 2342 #endif 2343 default: 2344 break; 2345 } 2346 } 2347 2348 #ifdef ENABLE_BLE 2349 static void event_handle_le_connection_complete(const uint8_t * packet){ 2350 bd_addr_t addr; 2351 bd_addr_type_t addr_type; 2352 hci_connection_t * conn; 2353 2354 // Connection management 2355 reverse_bd_addr(&packet[8], addr); 2356 addr_type = (bd_addr_type_t)packet[7]; 2357 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2358 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2359 2360 #ifdef ENABLE_LE_CENTRAL 2361 // handle error: error is reported only to the initiator -> outgoing connection 2362 if (packet[3]){ 2363 2364 // handle cancelled outgoing connection 2365 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2366 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2367 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2368 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2369 // reset state 2370 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2371 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2372 // get outgoing connection conn struct for direct connect 2373 conn = gap_get_outgoing_connection(); 2374 } 2375 2376 // outgoing le connection establishment is done 2377 if (conn){ 2378 // remove entry 2379 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2380 btstack_memory_hci_connection_free( conn ); 2381 } 2382 return; 2383 } 2384 #endif 2385 2386 // on success, both hosts receive connection complete event 2387 if (packet[6] == HCI_ROLE_MASTER){ 2388 #ifdef ENABLE_LE_CENTRAL 2389 // if we're master on an le connection, it was an outgoing connection and we're done with it 2390 // note: no hci_connection_t object exists yet for connect with whitelist 2391 if (hci_is_le_connection_type(addr_type)){ 2392 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2393 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2394 } 2395 #endif 2396 } else { 2397 #ifdef ENABLE_LE_PERIPHERAL 2398 // if we're slave, it was an incoming connection, advertisements have stopped 2399 hci_stack->le_advertisements_active = false; 2400 #endif 2401 } 2402 2403 // LE connections are auto-accepted, so just create a connection if there isn't one already 2404 if (!conn){ 2405 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2406 } 2407 2408 // no memory, sorry. 2409 if (!conn){ 2410 return; 2411 } 2412 2413 conn->state = OPEN; 2414 conn->role = packet[6]; 2415 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2416 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2417 2418 #ifdef ENABLE_LE_PERIPHERAL 2419 if (packet[6] == HCI_ROLE_SLAVE){ 2420 hci_update_advertisements_enabled_for_current_roles(); 2421 } 2422 #endif 2423 2424 // init unenhanced att bearer mtu 2425 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2426 conn->att_connection.mtu_exchanged = false; 2427 2428 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2429 2430 // restart timer 2431 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2432 // btstack_run_loop_add_timer(&conn->timeout); 2433 2434 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2435 2436 hci_emit_nr_connections_changed(); 2437 } 2438 #endif 2439 2440 #ifdef ENABLE_CLASSIC 2441 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){ 2442 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2443 // LEVEL_4 is tested by l2cap 2444 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2445 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2446 if (level >= LEVEL_3){ 2447 // MITM not possible without keyboard or display 2448 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2449 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2450 2451 // MITM possible if one side has keyboard and the other has keyboard or display 2452 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2453 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2454 2455 // MITM not possible if one side has only display and other side has no keyboard 2456 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2457 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2458 } 2459 // LEVEL 2 requires SSP, which is a given 2460 return true; 2461 } 2462 2463 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2464 uint16_t i; 2465 for (i=0; i < size ; i++){ 2466 if (data[i] != 0) { 2467 return false; 2468 } 2469 } 2470 return true; 2471 } 2472 2473 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2474 // get requested security level 2475 gap_security_level_t requested_security_level = conn->requested_security_level; 2476 if (hci_stack->gap_secure_connections_only_mode){ 2477 requested_security_level = LEVEL_4; 2478 } 2479 2480 // assess security: LEVEL 4 requires SC 2481 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2482 if ((requested_security_level == LEVEL_4) && 2483 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2484 !hci_remote_sc_enabled(conn)){ 2485 log_info("Level 4 required, but SC not supported -> abort"); 2486 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2487 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2488 return; 2489 } 2490 2491 // assess security based on io capabilities 2492 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2493 // responder: fully validate io caps of both sides as well as OOB data 2494 bool security_possible = false; 2495 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2496 2497 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2498 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2499 // so we merge the OOB data availability 2500 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2501 if (conn->classic_oob_c_192 != NULL){ 2502 have_oob_data |= 1; 2503 } 2504 if (conn->classic_oob_c_256 != NULL){ 2505 have_oob_data |= 2; 2506 } 2507 // for up to Level 3, either P-192 as well as P-256 will do 2508 // 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 2509 // if remote does not SC, we should not receive P-256 data either 2510 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2511 security_possible = true; 2512 } 2513 // for Level 4, P-256 is needed 2514 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2515 security_possible = true; 2516 } 2517 #endif 2518 2519 if (security_possible == false){ 2520 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2521 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2522 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2523 return; 2524 } 2525 } else { 2526 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2527 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2528 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2529 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2530 log_info("Level 3+ required, but no input/output -> abort"); 2531 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2532 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2533 return; 2534 } 2535 #endif 2536 #endif 2537 } 2538 2539 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2540 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2541 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2542 } else { 2543 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2544 } 2545 #endif 2546 } 2547 2548 #endif 2549 2550 static void event_handler(uint8_t *packet, uint16_t size){ 2551 2552 uint16_t event_length = packet[1]; 2553 2554 // assert packet is complete 2555 if (size != (event_length + 2u)){ 2556 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2557 return; 2558 } 2559 2560 bd_addr_type_t addr_type; 2561 hci_con_handle_t handle; 2562 hci_connection_t * conn; 2563 int i; 2564 int create_connection_cmd; 2565 2566 #ifdef ENABLE_CLASSIC 2567 hci_link_type_t link_type; 2568 bd_addr_t addr; 2569 #endif 2570 2571 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2572 2573 switch (hci_event_packet_get_type(packet)) { 2574 2575 case HCI_EVENT_COMMAND_COMPLETE: 2576 handle_command_complete_event(packet, size); 2577 break; 2578 2579 case HCI_EVENT_COMMAND_STATUS: 2580 // get num cmd packets - limit to 1 to reduce complexity 2581 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2582 2583 // check command status to detected failed outgoing connections 2584 create_connection_cmd = 0; 2585 #ifdef ENABLE_CLASSIC 2586 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2587 create_connection_cmd = 1; 2588 } 2589 #endif 2590 #ifdef ENABLE_LE_CENTRAL 2591 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2592 create_connection_cmd = 1; 2593 } 2594 #endif 2595 if (create_connection_cmd) { 2596 uint8_t status = hci_event_command_status_get_status(packet); 2597 addr_type = hci_stack->outgoing_addr_type; 2598 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2599 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); 2600 2601 // reset outgoing address info 2602 memset(hci_stack->outgoing_addr, 0, 6); 2603 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2604 2605 // on error 2606 if (status != ERROR_CODE_SUCCESS){ 2607 #ifdef ENABLE_LE_CENTRAL 2608 if (hci_is_le_connection_type(addr_type)){ 2609 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2610 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2611 } 2612 #endif 2613 // error => outgoing connection failed 2614 if (conn != NULL){ 2615 hci_handle_connection_failed(conn, status); 2616 } 2617 } 2618 } 2619 2620 #ifdef ENABLE_CLASSIC 2621 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2622 uint8_t status = hci_event_command_status_get_status(packet); 2623 log_info("command status (inquiry), status %x", status); 2624 if (status == ERROR_CODE_SUCCESS) { 2625 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2626 } else { 2627 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2628 } 2629 } 2630 #endif 2631 break; 2632 2633 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2634 if (size < 3) return; 2635 uint16_t num_handles = packet[2]; 2636 if (size != (3u + num_handles * 4u)) return; 2637 uint16_t offset = 3; 2638 for (i=0; i<num_handles;i++){ 2639 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2640 offset += 2u; 2641 uint16_t num_packets = little_endian_read_16(packet, offset); 2642 offset += 2u; 2643 2644 conn = hci_connection_for_handle(handle); 2645 if (!conn){ 2646 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2647 continue; 2648 } 2649 2650 if (conn->num_packets_sent >= num_packets){ 2651 conn->num_packets_sent -= num_packets; 2652 } else { 2653 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2654 conn->num_packets_sent = 0; 2655 } 2656 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2657 2658 #ifdef ENABLE_CLASSIC 2659 // For SCO, we do the can_send_now_check here 2660 hci_notify_if_sco_can_send_now(); 2661 #endif 2662 } 2663 break; 2664 } 2665 2666 #ifdef ENABLE_CLASSIC 2667 case HCI_EVENT_INQUIRY_COMPLETE: 2668 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2669 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2670 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2671 hci_emit_event(event, sizeof(event), 1); 2672 } 2673 break; 2674 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2675 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2676 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2677 } 2678 break; 2679 case HCI_EVENT_CONNECTION_REQUEST: 2680 reverse_bd_addr(&packet[2], addr); 2681 link_type = (hci_link_type_t) packet[11]; 2682 2683 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2684 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2685 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2686 bd_addr_copy(hci_stack->decline_addr, addr); 2687 break; 2688 } 2689 2690 if (hci_stack->gap_classic_accept_callback != NULL){ 2691 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2692 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2693 bd_addr_copy(hci_stack->decline_addr, addr); 2694 break; 2695 } 2696 } 2697 2698 // TODO: eval COD 8-10 2699 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2700 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2701 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2702 if (!conn) { 2703 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2704 } 2705 if (!conn) { 2706 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2707 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2708 bd_addr_copy(hci_stack->decline_addr, addr); 2709 break; 2710 } 2711 conn->role = HCI_ROLE_SLAVE; 2712 conn->state = RECEIVED_CONNECTION_REQUEST; 2713 // store info about eSCO 2714 if (link_type == HCI_LINK_TYPE_ESCO){ 2715 conn->remote_supported_features[0] |= 1; 2716 } 2717 hci_run(); 2718 break; 2719 2720 case HCI_EVENT_CONNECTION_COMPLETE: 2721 // Connection management 2722 reverse_bd_addr(&packet[5], addr); 2723 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2724 addr_type = BD_ADDR_TYPE_ACL; 2725 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2726 if (conn) { 2727 if (!packet[2]){ 2728 conn->state = OPEN; 2729 conn->con_handle = little_endian_read_16(packet, 3); 2730 2731 // queue set supervision timeout if we're master 2732 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2733 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2734 } 2735 2736 // restart timer 2737 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2738 btstack_run_loop_add_timer(&conn->timeout); 2739 2740 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2741 2742 hci_emit_nr_connections_changed(); 2743 } else { 2744 // connection failed 2745 hci_handle_connection_failed(conn, packet[2]); 2746 } 2747 } 2748 break; 2749 2750 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2751 reverse_bd_addr(&packet[5], addr); 2752 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2753 if (packet[2]){ 2754 // connection failed 2755 break; 2756 } 2757 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2758 if (!conn) { 2759 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2760 } 2761 if (!conn) { 2762 break; 2763 } 2764 conn->state = OPEN; 2765 conn->con_handle = little_endian_read_16(packet, 3); 2766 2767 #ifdef ENABLE_SCO_OVER_HCI 2768 // update SCO 2769 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2770 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2771 } 2772 // trigger can send now 2773 if (hci_have_usb_transport()){ 2774 hci_stack->sco_can_send_now = true; 2775 } 2776 #endif 2777 #ifdef HAVE_SCO_TRANSPORT 2778 // configure sco transport 2779 if (hci_stack->sco_transport != NULL){ 2780 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2781 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2782 } 2783 #endif 2784 break; 2785 2786 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2787 handle = little_endian_read_16(packet, 3); 2788 conn = hci_connection_for_handle(handle); 2789 if (!conn) break; 2790 if (!packet[2]){ 2791 const uint8_t * features = &packet[5]; 2792 hci_handle_remote_features_page_0(conn, features); 2793 2794 // read extended features if possible 2795 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2796 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2797 break; 2798 } 2799 } 2800 hci_handle_remote_features_received(conn); 2801 break; 2802 2803 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2804 handle = little_endian_read_16(packet, 3); 2805 conn = hci_connection_for_handle(handle); 2806 if (!conn) break; 2807 // status = ok, page = 1 2808 if (!packet[2]) { 2809 uint8_t page_number = packet[5]; 2810 uint8_t maximum_page_number = packet[6]; 2811 const uint8_t * features = &packet[7]; 2812 bool done = false; 2813 switch (page_number){ 2814 case 1: 2815 hci_handle_remote_features_page_1(conn, features); 2816 if (maximum_page_number >= 2){ 2817 // get Secure Connections (Controller) from Page 2 if available 2818 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2819 } else { 2820 // otherwise, assume SC (Controller) == SC (Host) 2821 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2822 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2823 } 2824 done = true; 2825 } 2826 break; 2827 case 2: 2828 hci_handle_remote_features_page_2(conn, features); 2829 done = true; 2830 break; 2831 default: 2832 break; 2833 } 2834 if (!done) break; 2835 } 2836 hci_handle_remote_features_received(conn); 2837 break; 2838 2839 case HCI_EVENT_LINK_KEY_REQUEST: 2840 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 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 // lookup link key in db if not cached 2846 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2847 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2848 } 2849 2850 // response sent by hci_run() 2851 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2852 #endif 2853 break; 2854 2855 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2856 hci_event_link_key_request_get_bd_addr(packet, addr); 2857 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2858 if (!conn) break; 2859 2860 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2861 2862 // CVE-2020-26555: ignore NULL link key 2863 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2864 if (btstack_is_null(&packet[8], 16)) break; 2865 2866 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2867 // Change Connection Encryption keeps link key type 2868 if (link_key_type != CHANGED_COMBINATION_KEY){ 2869 conn->link_key_type = link_key_type; 2870 } 2871 2872 // cache link key. link keys stored in little-endian format for legacy reasons 2873 memcpy(&conn->link_key, &packet[8], 16); 2874 2875 // only store link key: 2876 // - if bondable enabled 2877 if (hci_stack->bondable == false) break; 2878 // - if security level sufficient 2879 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2880 // - for SSP, also check if remote side requested bonding as well 2881 if (conn->link_key_type != COMBINATION_KEY){ 2882 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2883 if (!remote_bonding){ 2884 break; 2885 } 2886 } 2887 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2888 break; 2889 } 2890 2891 case HCI_EVENT_PIN_CODE_REQUEST: 2892 hci_event_pin_code_request_get_bd_addr(packet, addr); 2893 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2894 if (!conn) break; 2895 2896 hci_pairing_started(conn, false); 2897 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2898 if (!hci_stack->bondable ){ 2899 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2900 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2901 hci_run(); 2902 return; 2903 } 2904 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2905 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2906 log_info("Level 4 required, but SC not supported -> abort"); 2907 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2908 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2909 hci_run(); 2910 return; 2911 } 2912 break; 2913 2914 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2915 hci_event_io_capability_response_get_bd_addr(packet, addr); 2916 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2917 if (!conn) break; 2918 2919 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2920 hci_pairing_started(conn, true); 2921 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2922 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2923 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2924 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2925 #endif 2926 break; 2927 2928 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2929 hci_event_io_capability_response_get_bd_addr(packet, addr); 2930 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2931 if (!conn) break; 2932 2933 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2934 hci_connection_timestamp(conn); 2935 hci_pairing_started(conn, true); 2936 break; 2937 2938 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2939 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2940 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2941 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2942 if (!conn) break; 2943 2944 hci_connection_timestamp(conn); 2945 2946 hci_pairing_started(conn, true); 2947 2948 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2949 break; 2950 #endif 2951 2952 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2953 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2954 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2955 if (!conn) break; 2956 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2957 if (hci_stack->ssp_auto_accept){ 2958 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2959 }; 2960 } else { 2961 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2962 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2963 // don't forward event to app 2964 hci_run(); 2965 return; 2966 } 2967 break; 2968 2969 case HCI_EVENT_USER_PASSKEY_REQUEST: 2970 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2971 if (hci_stack->ssp_auto_accept){ 2972 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2973 }; 2974 break; 2975 2976 case HCI_EVENT_MODE_CHANGE: 2977 handle = hci_event_mode_change_get_handle(packet); 2978 conn = hci_connection_for_handle(handle); 2979 if (!conn) break; 2980 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2981 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2982 break; 2983 #endif 2984 2985 case HCI_EVENT_ENCRYPTION_CHANGE: 2986 handle = hci_event_encryption_change_get_connection_handle(packet); 2987 conn = hci_connection_for_handle(handle); 2988 if (!conn) break; 2989 if (hci_event_encryption_change_get_status(packet) == 0u) { 2990 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2991 if (encryption_enabled){ 2992 if (hci_is_le_connection(conn)){ 2993 // For LE, we accept connection as encrypted 2994 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2995 } 2996 #ifdef ENABLE_CLASSIC 2997 else { 2998 2999 // dedicated bonding: send result and disconnect 3000 if (conn->bonding_flags & BONDING_DEDICATED){ 3001 conn->bonding_flags &= ~BONDING_DEDICATED; 3002 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3003 conn->bonding_status = packet[2]; 3004 break; 3005 } 3006 3007 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3008 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3009 bool connected_uses_aes_ccm = encryption_enabled == 2; 3010 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3011 log_info("SC during pairing, but only E0 now -> abort"); 3012 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3013 break; 3014 } 3015 3016 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3017 if (connected_uses_aes_ccm){ 3018 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3019 } 3020 3021 #ifdef ENABLE_TESTING_SUPPORT 3022 // work around for issue with PTS dongle 3023 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3024 #endif 3025 3026 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3027 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3028 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3029 } else { 3030 // if not, pretend everything is perfect 3031 hci_handle_read_encryption_key_size_complete(conn, 16); 3032 } 3033 } 3034 #endif 3035 } else { 3036 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3037 } 3038 } 3039 3040 break; 3041 3042 #ifdef ENABLE_CLASSIC 3043 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3044 handle = hci_event_authentication_complete_get_connection_handle(packet); 3045 conn = hci_connection_for_handle(handle); 3046 if (!conn) break; 3047 3048 // clear authentication active flag 3049 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3050 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3051 3052 // authenticated only if auth status == 0 3053 if (hci_event_authentication_complete_get_status(packet) == 0){ 3054 // authenticated 3055 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3056 3057 // If not already encrypted, start encryption 3058 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3059 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3060 break; 3061 } 3062 } 3063 3064 // emit updated security level 3065 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3066 break; 3067 3068 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3069 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3070 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3071 if (!conn) break; 3072 3073 // treat successfully paired connection as authenticated 3074 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3075 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3076 } 3077 3078 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3079 break; 3080 #endif 3081 3082 // HCI_EVENT_DISCONNECTION_COMPLETE 3083 // has been split, to first notify stack before shutting connection down 3084 // see end of function, too. 3085 case HCI_EVENT_DISCONNECTION_COMPLETE: 3086 if (packet[2]) break; // status != 0 3087 handle = little_endian_read_16(packet, 3); 3088 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3089 if (hci_stack->acl_fragmentation_total_size > 0u) { 3090 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3091 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3092 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3093 hci_stack->acl_fragmentation_total_size = 0; 3094 hci_stack->acl_fragmentation_pos = 0; 3095 if (release_buffer){ 3096 hci_release_packet_buffer(); 3097 } 3098 } 3099 } 3100 3101 conn = hci_connection_for_handle(handle); 3102 if (!conn) break; 3103 #ifdef ENABLE_CLASSIC 3104 // pairing failed if it was ongoing 3105 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3106 #endif 3107 3108 // emit dedicatd bonding event 3109 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3110 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3111 } 3112 3113 // mark connection for shutdown, stop timers, reset state 3114 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3115 hci_connection_stop_timer(conn); 3116 hci_connection_init(conn); 3117 3118 #ifdef ENABLE_BLE 3119 #ifdef ENABLE_LE_PERIPHERAL 3120 // re-enable advertisements for le connections if active 3121 if (hci_is_le_connection(conn)){ 3122 hci_update_advertisements_enabled_for_current_roles(); 3123 } 3124 #endif 3125 #endif 3126 break; 3127 3128 case HCI_EVENT_HARDWARE_ERROR: 3129 log_error("Hardware Error: 0x%02x", packet[2]); 3130 if (hci_stack->hardware_error_callback){ 3131 (*hci_stack->hardware_error_callback)(packet[2]); 3132 } else { 3133 // if no special requests, just reboot stack 3134 hci_power_control_off(); 3135 hci_power_control_on(); 3136 } 3137 break; 3138 3139 #ifdef ENABLE_CLASSIC 3140 case HCI_EVENT_ROLE_CHANGE: 3141 if (packet[2]) break; // status != 0 3142 reverse_bd_addr(&packet[3], addr); 3143 addr_type = BD_ADDR_TYPE_ACL; 3144 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3145 if (!conn) break; 3146 conn->role = packet[9]; 3147 break; 3148 #endif 3149 3150 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3151 // release packet buffer only for asynchronous transport and if there are not further fragements 3152 if (hci_transport_synchronous()) { 3153 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3154 return; // instead of break: to avoid re-entering hci_run() 3155 } 3156 hci_stack->acl_fragmentation_tx_active = 0; 3157 if (hci_stack->acl_fragmentation_total_size) break; 3158 hci_release_packet_buffer(); 3159 3160 // L2CAP receives this event via the hci_emit_event below 3161 3162 #ifdef ENABLE_CLASSIC 3163 // For SCO, we do the can_send_now_check here 3164 hci_notify_if_sco_can_send_now(); 3165 #endif 3166 break; 3167 3168 #ifdef ENABLE_CLASSIC 3169 case HCI_EVENT_SCO_CAN_SEND_NOW: 3170 // For SCO, we do the can_send_now_check here 3171 hci_stack->sco_can_send_now = true; 3172 hci_notify_if_sco_can_send_now(); 3173 return; 3174 3175 // explode inquriy results for easier consumption 3176 case HCI_EVENT_INQUIRY_RESULT: 3177 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3178 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3179 gap_inquiry_explode(packet, size); 3180 break; 3181 #endif 3182 3183 #ifdef ENABLE_BLE 3184 case HCI_EVENT_LE_META: 3185 switch (packet[2]){ 3186 #ifdef ENABLE_LE_CENTRAL 3187 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3188 // log_info("advertising report received"); 3189 if (!hci_stack->le_scanning_enabled) break; 3190 le_handle_advertisement_report(packet, size); 3191 break; 3192 #endif 3193 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3194 event_handle_le_connection_complete(packet); 3195 break; 3196 3197 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3198 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3199 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3200 conn = hci_connection_for_handle(handle); 3201 if (!conn) break; 3202 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3203 break; 3204 3205 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3206 // connection 3207 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3208 conn = hci_connection_for_handle(handle); 3209 if (conn) { 3210 // read arguments 3211 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3212 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3213 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3214 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3215 3216 // validate against current connection parameter range 3217 le_connection_parameter_range_t existing_range; 3218 gap_get_connection_parameter_range(&existing_range); 3219 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3220 if (update_parameter){ 3221 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3222 conn->le_conn_interval_min = le_conn_interval_min; 3223 conn->le_conn_interval_max = le_conn_interval_max; 3224 conn->le_conn_latency = le_conn_latency; 3225 conn->le_supervision_timeout = le_supervision_timeout; 3226 } else { 3227 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3228 } 3229 } 3230 break; 3231 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3232 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3233 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3234 conn = hci_connection_for_handle(handle); 3235 if (conn) { 3236 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3237 } 3238 break; 3239 #endif 3240 default: 3241 break; 3242 } 3243 break; 3244 #endif 3245 case HCI_EVENT_VENDOR_SPECIFIC: 3246 // Vendor specific commands often create vendor specific event instead of num completed packets 3247 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3248 switch (hci_stack->manufacturer){ 3249 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3250 hci_stack->num_cmd_packets = 1; 3251 break; 3252 default: 3253 break; 3254 } 3255 break; 3256 default: 3257 break; 3258 } 3259 3260 handle_event_for_current_stack_state(packet, size); 3261 3262 // notify upper stack 3263 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3264 3265 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3266 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3267 handle = little_endian_read_16(packet, 3); 3268 hci_connection_t * aConn = hci_connection_for_handle(handle); 3269 // discard connection if app did not trigger a reconnect in the event handler 3270 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3271 hci_shutdown_connection(aConn); 3272 } 3273 } 3274 3275 // execute main loop 3276 hci_run(); 3277 } 3278 3279 #ifdef ENABLE_CLASSIC 3280 3281 #ifdef ENABLE_SCO_OVER_HCI 3282 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3283 static void sco_schedule_tx(hci_connection_t * conn); 3284 3285 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3286 log_debug("SCO TX Timeout"); 3287 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3288 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3289 if (!conn) return; 3290 3291 // trigger send 3292 conn->sco_tx_ready = 1; 3293 // extra packet if CVSD but SCO buffer is too short 3294 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3295 conn->sco_tx_ready++; 3296 } 3297 hci_notify_if_sco_can_send_now(); 3298 } 3299 3300 3301 #define SCO_TX_AFTER_RX_MS (6) 3302 3303 static void sco_schedule_tx(hci_connection_t * conn){ 3304 3305 uint32_t now = btstack_run_loop_get_time_ms(); 3306 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3307 int time_delta_ms = sco_tx_ms - now; 3308 3309 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3310 3311 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3312 btstack_run_loop_remove_timer(timer); 3313 btstack_run_loop_set_timer(timer, time_delta_ms); 3314 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3315 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3316 btstack_run_loop_add_timer(timer); 3317 } 3318 #endif 3319 3320 static void sco_handler(uint8_t * packet, uint16_t size){ 3321 // lookup connection struct 3322 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3323 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3324 if (!conn) return; 3325 3326 #ifdef ENABLE_SCO_OVER_HCI 3327 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3328 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3329 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3330 packet[2] = 0x3c; 3331 memmove(&packet[3], &packet[23], 63); 3332 size = 63; 3333 } 3334 } 3335 3336 if (hci_have_usb_transport()){ 3337 // Nothing to do 3338 } else { 3339 // 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); 3340 if (hci_stack->synchronous_flow_control_enabled == 0){ 3341 uint32_t now = btstack_run_loop_get_time_ms(); 3342 3343 if (!conn->sco_rx_valid){ 3344 // ignore first 10 packets 3345 conn->sco_rx_count++; 3346 // log_debug("sco rx count %u", conn->sco_rx_count); 3347 if (conn->sco_rx_count == 10) { 3348 // use first timestamp as is and pretent it just started 3349 conn->sco_rx_ms = now; 3350 conn->sco_rx_valid = 1; 3351 conn->sco_rx_count = 0; 3352 sco_schedule_tx(conn); 3353 } 3354 } else { 3355 // track expected arrival timme 3356 conn->sco_rx_count++; 3357 conn->sco_rx_ms += 7; 3358 int delta = (int32_t) (now - conn->sco_rx_ms); 3359 if (delta > 0){ 3360 conn->sco_rx_ms++; 3361 } 3362 // log_debug("sco rx %u", conn->sco_rx_ms); 3363 sco_schedule_tx(conn); 3364 } 3365 } 3366 } 3367 #endif 3368 3369 // deliver to app 3370 if (hci_stack->sco_packet_handler) { 3371 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3372 } 3373 3374 #ifdef HAVE_SCO_TRANSPORT 3375 // We can send one packet for each received packet 3376 conn->sco_tx_ready++; 3377 hci_notify_if_sco_can_send_now(); 3378 #endif 3379 3380 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3381 conn->num_packets_completed++; 3382 hci_stack->host_completed_packets = 1; 3383 hci_run(); 3384 #endif 3385 } 3386 #endif 3387 3388 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3389 hci_dump_packet(packet_type, 1, packet, size); 3390 switch (packet_type) { 3391 case HCI_EVENT_PACKET: 3392 event_handler(packet, size); 3393 break; 3394 case HCI_ACL_DATA_PACKET: 3395 acl_handler(packet, size); 3396 break; 3397 #ifdef ENABLE_CLASSIC 3398 case HCI_SCO_DATA_PACKET: 3399 sco_handler(packet, size); 3400 break; 3401 #endif 3402 default: 3403 break; 3404 } 3405 } 3406 3407 /** 3408 * @brief Add event packet handler. 3409 */ 3410 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3411 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3412 } 3413 3414 /** 3415 * @brief Remove event packet handler. 3416 */ 3417 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3418 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3419 } 3420 3421 /** Register HCI packet handlers */ 3422 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3423 hci_stack->acl_packet_handler = handler; 3424 } 3425 3426 #ifdef ENABLE_CLASSIC 3427 /** 3428 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3429 */ 3430 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3431 hci_stack->sco_packet_handler = handler; 3432 } 3433 #endif 3434 3435 static void hci_state_reset(void){ 3436 // no connections yet 3437 hci_stack->connections = NULL; 3438 3439 // keep discoverable/connectable as this has been requested by the client(s) 3440 // hci_stack->discoverable = 0; 3441 // hci_stack->connectable = 0; 3442 // hci_stack->bondable = 1; 3443 // hci_stack->own_addr_type = 0; 3444 3445 // buffer is free 3446 hci_stack->hci_packet_buffer_reserved = false; 3447 3448 // no pending cmds 3449 hci_stack->decline_reason = 0; 3450 3451 hci_stack->secure_connections_active = false; 3452 3453 #ifdef ENABLE_CLASSIC 3454 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3455 hci_stack->gap_tasks = 3456 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3457 GAP_TASK_SET_CLASS_OF_DEVICE | 3458 GAP_TASK_SET_LOCAL_NAME | 3459 GAP_TASK_SET_EIR_DATA | 3460 GAP_TASK_WRITE_SCAN_ENABLE; 3461 #endif 3462 3463 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3464 hci_stack->classic_read_local_oob_data = false; 3465 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3466 #endif 3467 3468 // LE 3469 #ifdef ENABLE_BLE 3470 memset(hci_stack->le_random_address, 0, 6); 3471 hci_stack->le_random_address_set = 0; 3472 #endif 3473 #ifdef ENABLE_LE_CENTRAL 3474 hci_stack->le_scanning_active = false; 3475 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3476 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3477 hci_stack->le_whitelist_capacity = 0; 3478 #endif 3479 #ifdef ENABLE_LE_PERIPHERAL 3480 hci_stack->le_advertisements_active = false; 3481 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3482 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3483 } 3484 if (hci_stack->le_advertisements_data != NULL){ 3485 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3486 } 3487 #endif 3488 } 3489 3490 #ifdef ENABLE_CLASSIC 3491 /** 3492 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3493 */ 3494 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3495 // store and open remote device db 3496 hci_stack->link_key_db = link_key_db; 3497 if (hci_stack->link_key_db) { 3498 hci_stack->link_key_db->open(); 3499 } 3500 } 3501 #endif 3502 3503 void hci_init(const hci_transport_t *transport, const void *config){ 3504 3505 #ifdef HAVE_MALLOC 3506 if (!hci_stack) { 3507 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3508 } 3509 #else 3510 hci_stack = &hci_stack_static; 3511 #endif 3512 memset(hci_stack, 0, sizeof(hci_stack_t)); 3513 3514 // reference to use transport layer implementation 3515 hci_stack->hci_transport = transport; 3516 3517 // reference to used config 3518 hci_stack->config = config; 3519 3520 // setup pointer for outgoing packet buffer 3521 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3522 3523 // max acl payload size defined in config.h 3524 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3525 3526 // register packet handlers with transport 3527 transport->register_packet_handler(&packet_handler); 3528 3529 hci_stack->state = HCI_STATE_OFF; 3530 3531 // class of device 3532 hci_stack->class_of_device = 0x007a020c; // Smartphone 3533 3534 // bondable by default 3535 hci_stack->bondable = 1; 3536 3537 #ifdef ENABLE_CLASSIC 3538 // classic name 3539 hci_stack->local_name = default_classic_name; 3540 3541 // Master slave policy 3542 hci_stack->master_slave_policy = 1; 3543 3544 // Allow Role Switch 3545 hci_stack->allow_role_switch = 1; 3546 3547 // Default / minimum security level = 2 3548 hci_stack->gap_security_level = LEVEL_2; 3549 3550 // Default Security Mode 4 3551 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3552 3553 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3554 hci_stack->gap_required_encyrption_key_size = 7; 3555 3556 // Link Supervision Timeout 3557 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3558 3559 #endif 3560 3561 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3562 hci_stack->ssp_enable = 1; 3563 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3564 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3565 hci_stack->ssp_auto_accept = 1; 3566 3567 // Secure Connections: enable (requires support from Controller) 3568 hci_stack->secure_connections_enable = true; 3569 3570 // voice setting - signed 16 bit pcm data with CVSD over the air 3571 hci_stack->sco_voice_setting = 0x60; 3572 3573 #ifdef ENABLE_LE_CENTRAL 3574 // connection parameter to use for outgoing connections 3575 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3576 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3577 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3578 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3579 hci_stack->le_connection_latency = 4; // 4 3580 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3581 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3582 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3583 3584 // default LE Scanning 3585 hci_stack->le_scan_type = 0x1; // active 3586 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3587 hci_stack->le_scan_window = 0x30; // 30 ms 3588 #endif 3589 3590 #ifdef ENABLE_LE_PERIPHERAL 3591 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3592 #endif 3593 3594 // connection parameter range used to answer connection parameter update requests in l2cap 3595 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3596 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3597 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3598 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3599 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3600 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3601 3602 hci_state_reset(); 3603 } 3604 3605 void hci_deinit(void){ 3606 #ifdef HAVE_MALLOC 3607 if (hci_stack) { 3608 free(hci_stack); 3609 } 3610 #endif 3611 hci_stack = NULL; 3612 3613 #ifdef ENABLE_CLASSIC 3614 disable_l2cap_timeouts = 0; 3615 #endif 3616 } 3617 3618 /** 3619 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3620 */ 3621 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3622 hci_stack->chipset = chipset_driver; 3623 3624 // reset chipset driver - init is also called on power_up 3625 if (hci_stack->chipset && hci_stack->chipset->init){ 3626 hci_stack->chipset->init(hci_stack->config); 3627 } 3628 } 3629 3630 /** 3631 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3632 */ 3633 void hci_set_control(const btstack_control_t *hardware_control){ 3634 // references to used control implementation 3635 hci_stack->control = hardware_control; 3636 // init with transport config 3637 hardware_control->init(hci_stack->config); 3638 } 3639 3640 void hci_close(void){ 3641 3642 #ifdef ENABLE_CLASSIC 3643 // close remote device db 3644 if (hci_stack->link_key_db) { 3645 hci_stack->link_key_db->close(); 3646 } 3647 #endif 3648 3649 btstack_linked_list_iterator_t lit; 3650 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3651 while (btstack_linked_list_iterator_has_next(&lit)){ 3652 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3653 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3654 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3655 hci_shutdown_connection(connection); 3656 } 3657 3658 hci_power_control(HCI_POWER_OFF); 3659 3660 #ifdef HAVE_MALLOC 3661 free(hci_stack); 3662 #endif 3663 hci_stack = NULL; 3664 } 3665 3666 #ifdef HAVE_SCO_TRANSPORT 3667 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3668 hci_stack->sco_transport = sco_transport; 3669 sco_transport->register_packet_handler(&packet_handler); 3670 } 3671 #endif 3672 3673 #ifdef ENABLE_CLASSIC 3674 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3675 // validate ranage and set 3676 if (encryption_key_size < 7) return; 3677 if (encryption_key_size > 16) return; 3678 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3679 } 3680 3681 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3682 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3683 hci_stack->gap_security_mode = security_mode; 3684 return ERROR_CODE_SUCCESS; 3685 } else { 3686 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3687 } 3688 } 3689 3690 gap_security_mode_t gap_get_security_mode(void){ 3691 return hci_stack->gap_security_mode; 3692 } 3693 3694 void gap_set_security_level(gap_security_level_t security_level){ 3695 hci_stack->gap_security_level = security_level; 3696 } 3697 3698 gap_security_level_t gap_get_security_level(void){ 3699 if (hci_stack->gap_secure_connections_only_mode){ 3700 return LEVEL_4; 3701 } 3702 return hci_stack->gap_security_level; 3703 } 3704 3705 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3706 hci_stack->gap_minimal_service_security_level = security_level; 3707 } 3708 3709 void gap_set_secure_connections_only_mode(bool enable){ 3710 hci_stack->gap_secure_connections_only_mode = enable; 3711 } 3712 3713 bool gap_get_secure_connections_only_mode(void){ 3714 return hci_stack->gap_secure_connections_only_mode; 3715 } 3716 #endif 3717 3718 #ifdef ENABLE_CLASSIC 3719 void gap_set_class_of_device(uint32_t class_of_device){ 3720 hci_stack->class_of_device = class_of_device; 3721 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3722 hci_run(); 3723 } 3724 3725 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3726 hci_stack->default_link_policy_settings = default_link_policy_settings; 3727 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3728 hci_run(); 3729 } 3730 3731 void gap_set_allow_role_switch(bool allow_role_switch){ 3732 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3733 } 3734 3735 uint8_t hci_get_allow_role_switch(void){ 3736 return hci_stack->allow_role_switch; 3737 } 3738 3739 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3740 hci_stack->link_supervision_timeout = link_supervision_timeout; 3741 } 3742 3743 void hci_disable_l2cap_timeout_check(void){ 3744 disable_l2cap_timeouts = 1; 3745 } 3746 #endif 3747 3748 #ifndef HAVE_HOST_CONTROLLER_API 3749 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3750 void hci_set_bd_addr(bd_addr_t addr){ 3751 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3752 hci_stack->custom_bd_addr_set = 1; 3753 } 3754 #endif 3755 3756 // State-Module-Driver overview 3757 // state module low-level 3758 // HCI_STATE_OFF off close 3759 // HCI_STATE_INITIALIZING, on open 3760 // HCI_STATE_WORKING, on open 3761 // HCI_STATE_HALTING, on open 3762 // HCI_STATE_SLEEPING, off/sleep close 3763 // HCI_STATE_FALLING_ASLEEP on open 3764 3765 static int hci_power_control_on(void){ 3766 3767 // power on 3768 int err = 0; 3769 if (hci_stack->control && hci_stack->control->on){ 3770 err = (*hci_stack->control->on)(); 3771 } 3772 if (err){ 3773 log_error( "POWER_ON failed"); 3774 hci_emit_hci_open_failed(); 3775 return err; 3776 } 3777 3778 // int chipset driver 3779 if (hci_stack->chipset && hci_stack->chipset->init){ 3780 hci_stack->chipset->init(hci_stack->config); 3781 } 3782 3783 // init transport 3784 if (hci_stack->hci_transport->init){ 3785 hci_stack->hci_transport->init(hci_stack->config); 3786 } 3787 3788 // open transport 3789 err = hci_stack->hci_transport->open(); 3790 if (err){ 3791 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3792 if (hci_stack->control && hci_stack->control->off){ 3793 (*hci_stack->control->off)(); 3794 } 3795 hci_emit_hci_open_failed(); 3796 return err; 3797 } 3798 return 0; 3799 } 3800 3801 static void hci_power_control_off(void){ 3802 3803 log_info("hci_power_control_off"); 3804 3805 // close low-level device 3806 hci_stack->hci_transport->close(); 3807 3808 log_info("hci_power_control_off - hci_transport closed"); 3809 3810 // power off 3811 if (hci_stack->control && hci_stack->control->off){ 3812 (*hci_stack->control->off)(); 3813 } 3814 3815 log_info("hci_power_control_off - control closed"); 3816 3817 hci_stack->state = HCI_STATE_OFF; 3818 } 3819 3820 static void hci_power_control_sleep(void){ 3821 3822 log_info("hci_power_control_sleep"); 3823 3824 #if 0 3825 // don't close serial port during sleep 3826 3827 // close low-level device 3828 hci_stack->hci_transport->close(hci_stack->config); 3829 #endif 3830 3831 // sleep mode 3832 if (hci_stack->control && hci_stack->control->sleep){ 3833 (*hci_stack->control->sleep)(); 3834 } 3835 3836 hci_stack->state = HCI_STATE_SLEEPING; 3837 } 3838 3839 static int hci_power_control_wake(void){ 3840 3841 log_info("hci_power_control_wake"); 3842 3843 // wake on 3844 if (hci_stack->control && hci_stack->control->wake){ 3845 (*hci_stack->control->wake)(); 3846 } 3847 3848 #if 0 3849 // open low-level device 3850 int err = hci_stack->hci_transport->open(hci_stack->config); 3851 if (err){ 3852 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3853 if (hci_stack->control && hci_stack->control->off){ 3854 (*hci_stack->control->off)(); 3855 } 3856 hci_emit_hci_open_failed(); 3857 return err; 3858 } 3859 #endif 3860 3861 return 0; 3862 } 3863 3864 static void hci_power_transition_to_initializing(void){ 3865 // set up state machine 3866 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3867 hci_stack->hci_packet_buffer_reserved = false; 3868 hci_stack->state = HCI_STATE_INITIALIZING; 3869 hci_stack->substate = HCI_INIT_SEND_RESET; 3870 } 3871 3872 // returns error 3873 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3874 int err; 3875 switch (power_mode){ 3876 case HCI_POWER_ON: 3877 err = hci_power_control_on(); 3878 if (err != 0) { 3879 log_error("hci_power_control_on() error %d", err); 3880 return err; 3881 } 3882 hci_power_transition_to_initializing(); 3883 break; 3884 case HCI_POWER_OFF: 3885 // do nothing 3886 break; 3887 case HCI_POWER_SLEEP: 3888 // do nothing (with SLEEP == OFF) 3889 break; 3890 default: 3891 btstack_assert(false); 3892 break; 3893 } 3894 return ERROR_CODE_SUCCESS; 3895 } 3896 3897 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3898 switch (power_mode){ 3899 case HCI_POWER_ON: 3900 // do nothing 3901 break; 3902 case HCI_POWER_OFF: 3903 // no connections yet, just turn it off 3904 hci_power_control_off(); 3905 break; 3906 case HCI_POWER_SLEEP: 3907 // no connections yet, just turn it off 3908 hci_power_control_sleep(); 3909 break; 3910 default: 3911 btstack_assert(false); 3912 break; 3913 } 3914 return ERROR_CODE_SUCCESS; 3915 } 3916 3917 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3918 switch (power_mode){ 3919 case HCI_POWER_ON: 3920 // do nothing 3921 break; 3922 case HCI_POWER_OFF: 3923 // see hci_run 3924 hci_stack->state = HCI_STATE_HALTING; 3925 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3926 break; 3927 case HCI_POWER_SLEEP: 3928 // see hci_run 3929 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3930 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3931 break; 3932 default: 3933 btstack_assert(false); 3934 break; 3935 } 3936 return ERROR_CODE_SUCCESS; 3937 } 3938 3939 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3940 switch (power_mode){ 3941 case HCI_POWER_ON: 3942 hci_power_transition_to_initializing(); 3943 break; 3944 case HCI_POWER_OFF: 3945 // do nothing 3946 break; 3947 case HCI_POWER_SLEEP: 3948 // see hci_run 3949 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3950 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3951 break; 3952 default: 3953 btstack_assert(false); 3954 break; 3955 } 3956 return ERROR_CODE_SUCCESS; 3957 } 3958 3959 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3960 switch (power_mode){ 3961 case HCI_POWER_ON: 3962 hci_power_transition_to_initializing(); 3963 break; 3964 case HCI_POWER_OFF: 3965 // see hci_run 3966 hci_stack->state = HCI_STATE_HALTING; 3967 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3968 break; 3969 case HCI_POWER_SLEEP: 3970 // do nothing 3971 break; 3972 default: 3973 btstack_assert(false); 3974 break; 3975 } 3976 return ERROR_CODE_SUCCESS; 3977 } 3978 3979 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3980 int err; 3981 switch (power_mode){ 3982 case HCI_POWER_ON: 3983 err = hci_power_control_wake(); 3984 if (err) return err; 3985 hci_power_transition_to_initializing(); 3986 break; 3987 case HCI_POWER_OFF: 3988 hci_stack->state = HCI_STATE_HALTING; 3989 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3990 break; 3991 case HCI_POWER_SLEEP: 3992 // do nothing 3993 break; 3994 default: 3995 btstack_assert(false); 3996 break; 3997 } 3998 return ERROR_CODE_SUCCESS; 3999 } 4000 4001 int hci_power_control(HCI_POWER_MODE power_mode){ 4002 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4003 int err = 0; 4004 switch (hci_stack->state){ 4005 case HCI_STATE_OFF: 4006 err = hci_power_control_state_off(power_mode); 4007 break; 4008 case HCI_STATE_INITIALIZING: 4009 err = hci_power_control_state_initializing(power_mode); 4010 break; 4011 case HCI_STATE_WORKING: 4012 err = hci_power_control_state_working(power_mode); 4013 break; 4014 case HCI_STATE_HALTING: 4015 err = hci_power_control_state_halting(power_mode); 4016 break; 4017 case HCI_STATE_FALLING_ASLEEP: 4018 err = hci_power_control_state_falling_asleep(power_mode); 4019 break; 4020 case HCI_STATE_SLEEPING: 4021 err = hci_power_control_state_sleeping(power_mode); 4022 break; 4023 default: 4024 btstack_assert(false); 4025 break; 4026 } 4027 if (err != 0){ 4028 return err; 4029 } 4030 4031 // create internal event 4032 hci_emit_state(); 4033 4034 // trigger next/first action 4035 hci_run(); 4036 4037 return 0; 4038 } 4039 4040 4041 #ifdef ENABLE_CLASSIC 4042 4043 static void hci_update_scan_enable(void){ 4044 // 2 = page scan, 1 = inq scan 4045 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4046 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4047 hci_run(); 4048 } 4049 4050 void gap_discoverable_control(uint8_t enable){ 4051 if (enable) enable = 1; // normalize argument 4052 4053 if (hci_stack->discoverable == enable){ 4054 hci_emit_discoverable_enabled(hci_stack->discoverable); 4055 return; 4056 } 4057 4058 hci_stack->discoverable = enable; 4059 hci_update_scan_enable(); 4060 } 4061 4062 void gap_connectable_control(uint8_t enable){ 4063 if (enable) enable = 1; // normalize argument 4064 4065 // don't emit event 4066 if (hci_stack->connectable == enable) return; 4067 4068 hci_stack->connectable = enable; 4069 hci_update_scan_enable(); 4070 } 4071 #endif 4072 4073 void gap_local_bd_addr(bd_addr_t address_buffer){ 4074 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4075 } 4076 4077 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4078 static void hci_host_num_completed_packets(void){ 4079 4080 // create packet manually as arrays are not supported and num_commands should not get reduced 4081 hci_reserve_packet_buffer(); 4082 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4083 4084 uint16_t size = 0; 4085 uint16_t num_handles = 0; 4086 packet[size++] = 0x35; 4087 packet[size++] = 0x0c; 4088 size++; // skip param len 4089 size++; // skip num handles 4090 4091 // add { handle, packets } entries 4092 btstack_linked_item_t * it; 4093 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4094 hci_connection_t * connection = (hci_connection_t *) it; 4095 if (connection->num_packets_completed){ 4096 little_endian_store_16(packet, size, connection->con_handle); 4097 size += 2; 4098 little_endian_store_16(packet, size, connection->num_packets_completed); 4099 size += 2; 4100 // 4101 num_handles++; 4102 connection->num_packets_completed = 0; 4103 } 4104 } 4105 4106 packet[2] = size - 3; 4107 packet[3] = num_handles; 4108 4109 hci_stack->host_completed_packets = 0; 4110 4111 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4112 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4113 4114 // release packet buffer for synchronous transport implementations 4115 if (hci_transport_synchronous()){ 4116 hci_release_packet_buffer(); 4117 hci_emit_transport_packet_sent(); 4118 } 4119 } 4120 #endif 4121 4122 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4123 UNUSED(ds); 4124 hci_stack->substate = HCI_HALTING_CLOSE; 4125 // allow packet handlers to defer final shutdown 4126 hci_emit_state(); 4127 hci_run(); 4128 } 4129 4130 static bool hci_run_acl_fragments(void){ 4131 if (hci_stack->acl_fragmentation_total_size > 0u) { 4132 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4133 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4134 if (connection) { 4135 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4136 hci_send_acl_packet_fragments(connection); 4137 return true; 4138 } 4139 } else { 4140 // connection gone -> discard further fragments 4141 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4142 hci_stack->acl_fragmentation_total_size = 0; 4143 hci_stack->acl_fragmentation_pos = 0; 4144 } 4145 } 4146 return false; 4147 } 4148 4149 #ifdef ENABLE_CLASSIC 4150 static bool hci_run_general_gap_classic(void){ 4151 4152 // assert stack is working and classic is active 4153 if (hci_classic_supported() == false) return false; 4154 if (hci_stack->state != HCI_STATE_WORKING) return false; 4155 4156 // decline incoming connections 4157 if (hci_stack->decline_reason){ 4158 uint8_t reason = hci_stack->decline_reason; 4159 hci_stack->decline_reason = 0; 4160 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4161 return true; 4162 } 4163 4164 if (hci_stack->gap_tasks != 0){ 4165 hci_run_gap_tasks_classic(); 4166 return true; 4167 } 4168 4169 // start/stop inquiry 4170 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4171 uint8_t duration = hci_stack->inquiry_state; 4172 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4173 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4174 return true; 4175 } 4176 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4177 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4178 hci_send_cmd(&hci_inquiry_cancel); 4179 return true; 4180 } 4181 // remote name request 4182 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4183 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4184 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4185 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4186 return true; 4187 } 4188 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4189 // Local OOB data 4190 if (hci_stack->classic_read_local_oob_data){ 4191 hci_stack->classic_read_local_oob_data = false; 4192 if (hci_stack->local_supported_commands[1] & 0x10u){ 4193 hci_send_cmd(&hci_read_local_extended_oob_data); 4194 } else { 4195 hci_send_cmd(&hci_read_local_oob_data); 4196 } 4197 } 4198 #endif 4199 // pairing 4200 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4201 uint8_t state = hci_stack->gap_pairing_state; 4202 uint8_t pin_code[16]; 4203 switch (state){ 4204 case GAP_PAIRING_STATE_SEND_PIN: 4205 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4206 memset(pin_code, 0, 16); 4207 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4208 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4209 break; 4210 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4211 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4212 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4213 break; 4214 case GAP_PAIRING_STATE_SEND_PASSKEY: 4215 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4216 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4217 break; 4218 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4219 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4220 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4221 break; 4222 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4223 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4224 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4225 break; 4226 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4227 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4228 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4229 break; 4230 default: 4231 break; 4232 } 4233 return true; 4234 } 4235 return false; 4236 } 4237 #endif 4238 4239 #ifdef ENABLE_BLE 4240 static bool hci_run_general_gap_le(void){ 4241 4242 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4243 4244 if (hci_stack->state != HCI_STATE_WORKING) return false; 4245 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4246 4247 4248 // Phase 1: collect what to stop 4249 4250 bool scanning_stop = false; 4251 bool connecting_stop = false; 4252 bool advertising_stop = false; 4253 4254 #ifndef ENABLE_LE_CENTRAL 4255 UNUSED(scanning_stop); 4256 UNUSED(connecting_stop); 4257 #endif 4258 #ifndef ENABLE_LE_PERIPHERAL 4259 UNUSED(advertising_stop); 4260 #endif 4261 4262 // check if own address changes 4263 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4264 4265 // check if whitelist needs modification 4266 bool whitelist_modification_pending = false; 4267 btstack_linked_list_iterator_t lit; 4268 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4269 while (btstack_linked_list_iterator_has_next(&lit)){ 4270 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4271 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4272 whitelist_modification_pending = true; 4273 break; 4274 } 4275 } 4276 // check if resolving list needs modification 4277 bool resolving_list_modification_pending = false; 4278 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4279 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4280 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4281 resolving_list_modification_pending = true; 4282 } 4283 #endif 4284 4285 #ifdef ENABLE_LE_CENTRAL 4286 // scanning control 4287 if (hci_stack->le_scanning_active) { 4288 // stop if: 4289 // - parameter change required 4290 // - it's disabled 4291 // - whitelist change required but used for scanning 4292 // - resolving list modified 4293 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4294 if ((hci_stack->le_scanning_param_update) || 4295 !hci_stack->le_scanning_enabled || 4296 scanning_uses_whitelist || 4297 resolving_list_modification_pending){ 4298 4299 scanning_stop = true; 4300 } 4301 } 4302 #endif 4303 4304 #ifdef ENABLE_LE_CENTRAL 4305 // connecting control 4306 bool connecting_with_whitelist; 4307 switch (hci_stack->le_connecting_state){ 4308 case LE_CONNECTING_DIRECT: 4309 case LE_CONNECTING_WHITELIST: 4310 // stop connecting if: 4311 // - connecting uses white and whitelist modification pending 4312 // - if it got disabled 4313 // - resolving list modified 4314 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4315 if ((connecting_with_whitelist && whitelist_modification_pending) || 4316 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4317 resolving_list_modification_pending) { 4318 4319 connecting_stop = true; 4320 } 4321 break; 4322 default: 4323 break; 4324 } 4325 #endif 4326 4327 #ifdef ENABLE_LE_PERIPHERAL 4328 // le advertisement control 4329 if (hci_stack->le_advertisements_active){ 4330 // stop if: 4331 // - parameter change required 4332 // - random address used in advertising and changes 4333 // - it's disabled 4334 // - whitelist change required but used for advertisement filter policy 4335 // - resolving list modified 4336 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4337 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4338 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4339 if (advertising_change || 4340 (advertising_uses_random_address && random_address_change) || 4341 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4342 (advertising_uses_whitelist && whitelist_modification_pending) || 4343 resolving_list_modification_pending) { 4344 4345 advertising_stop = true; 4346 } 4347 } 4348 #endif 4349 4350 4351 // Phase 2: stop everything that should be off during modifications 4352 4353 #ifdef ENABLE_LE_CENTRAL 4354 if (scanning_stop){ 4355 hci_stack->le_scanning_active = false; 4356 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4357 return true; 4358 } 4359 #endif 4360 4361 #ifdef ENABLE_LE_CENTRAL 4362 if (connecting_stop){ 4363 hci_send_cmd(&hci_le_create_connection_cancel); 4364 return true; 4365 } 4366 #endif 4367 4368 #ifdef ENABLE_LE_PERIPHERAL 4369 if (advertising_stop){ 4370 hci_stack->le_advertisements_active = false; 4371 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4372 return true; 4373 } 4374 #endif 4375 4376 // Phase 3: modify 4377 4378 if (random_address_change){ 4379 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4380 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4381 return true; 4382 } 4383 4384 #ifdef ENABLE_LE_CENTRAL 4385 if (hci_stack->le_scanning_param_update){ 4386 hci_stack->le_scanning_param_update = false; 4387 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4388 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4389 return true; 4390 } 4391 #endif 4392 4393 #ifdef ENABLE_LE_PERIPHERAL 4394 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4395 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4396 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4397 hci_send_cmd(&hci_le_set_advertising_parameters, 4398 hci_stack->le_advertisements_interval_min, 4399 hci_stack->le_advertisements_interval_max, 4400 hci_stack->le_advertisements_type, 4401 hci_stack->le_advertisements_own_addr_type, 4402 hci_stack->le_advertisements_direct_address_type, 4403 hci_stack->le_advertisements_direct_address, 4404 hci_stack->le_advertisements_channel_map, 4405 hci_stack->le_advertisements_filter_policy); 4406 return true; 4407 } 4408 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4409 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4410 uint8_t adv_data_clean[31]; 4411 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4412 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4413 hci_stack->le_advertisements_data_len); 4414 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4415 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4416 return true; 4417 } 4418 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4419 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4420 uint8_t scan_data_clean[31]; 4421 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4422 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4423 hci_stack->le_scan_response_data_len); 4424 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4425 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4426 return true; 4427 } 4428 #endif 4429 4430 4431 #ifdef ENABLE_LE_CENTRAL 4432 // if connect with whitelist was active and is not cancelled yet, wait until next time 4433 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4434 #endif 4435 4436 // LE Whitelist Management 4437 if (whitelist_modification_pending){ 4438 // add/remove entries 4439 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4440 while (btstack_linked_list_iterator_has_next(&lit)){ 4441 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4442 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4443 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4444 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4445 return true; 4446 } 4447 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4448 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4449 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4450 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4451 return true; 4452 } 4453 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4454 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4455 btstack_memory_whitelist_entry_free(entry); 4456 } 4457 } 4458 } 4459 4460 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4461 // LE Resolving List Management 4462 if (resolving_list_supported) { 4463 uint16_t i; 4464 switch (hci_stack->le_resolving_list_state) { 4465 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4466 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4467 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4468 return true; 4469 case LE_RESOLVING_LIST_READ_SIZE: 4470 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4471 hci_send_cmd(&hci_le_read_resolving_list_size); 4472 return true; 4473 case LE_RESOLVING_LIST_SEND_CLEAR: 4474 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4475 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4476 sizeof(hci_stack->le_resolving_list_add_entries)); 4477 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4478 sizeof(hci_stack->le_resolving_list_remove_entries)); 4479 hci_send_cmd(&hci_le_clear_resolving_list); 4480 return true; 4481 case LE_RESOLVING_LIST_REMOVE_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_remove_entries[offset] & mask) == 0) continue; 4486 hci_stack->le_resolving_list_remove_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 4493 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4494 // trigger whitelist entry 'update' (work around for controller bug) 4495 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4496 while (btstack_linked_list_iterator_has_next(&lit)) { 4497 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4498 if (entry->address_type != peer_identity_addr_type) continue; 4499 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4500 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4501 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4502 } 4503 #endif 4504 4505 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4506 peer_identity_addreses); 4507 return true; 4508 } 4509 4510 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4511 4512 /* fall through */ 4513 4514 case LE_RESOLVING_LIST_ADD_ENTRIES: 4515 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4516 uint8_t offset = i >> 3; 4517 uint8_t mask = 1 << (i & 7); 4518 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4519 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4520 bd_addr_t peer_identity_addreses; 4521 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4522 sm_key_t peer_irk; 4523 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4524 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4525 const uint8_t *local_irk = gap_get_persistent_irk(); 4526 // command uses format specifier 'P' that stores 16-byte value without flip 4527 uint8_t local_irk_flipped[16]; 4528 uint8_t peer_irk_flipped[16]; 4529 reverse_128(local_irk, local_irk_flipped); 4530 reverse_128(peer_irk, peer_irk_flipped); 4531 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4532 peer_irk_flipped, local_irk_flipped); 4533 return true; 4534 } 4535 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4536 break; 4537 4538 default: 4539 break; 4540 } 4541 } 4542 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4543 #endif 4544 4545 // Phase 4: restore state 4546 4547 #ifdef ENABLE_LE_CENTRAL 4548 // re-start scanning 4549 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4550 hci_stack->le_scanning_active = true; 4551 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4552 return true; 4553 } 4554 #endif 4555 4556 #ifdef ENABLE_LE_CENTRAL 4557 // re-start connecting 4558 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4559 bd_addr_t null_addr; 4560 memset(null_addr, 0, 6); 4561 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4562 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4563 hci_send_cmd(&hci_le_create_connection, 4564 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4565 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4566 1, // use whitelist 4567 0, // peer address type 4568 null_addr, // peer bd addr 4569 hci_stack->le_connection_own_addr_type, // our addr type: 4570 hci_stack->le_connection_interval_min, // conn interval min 4571 hci_stack->le_connection_interval_max, // conn interval max 4572 hci_stack->le_connection_latency, // conn latency 4573 hci_stack->le_supervision_timeout, // conn latency 4574 hci_stack->le_minimum_ce_length, // min ce length 4575 hci_stack->le_maximum_ce_length // max ce length 4576 ); 4577 return true; 4578 } 4579 #endif 4580 4581 #ifdef ENABLE_LE_PERIPHERAL 4582 // re-start advertising 4583 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4584 // check if advertisements should be enabled given 4585 hci_stack->le_advertisements_active = true; 4586 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4587 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4588 return true; 4589 } 4590 #endif 4591 4592 return false; 4593 } 4594 #endif 4595 4596 static bool hci_run_general_pending_commands(void){ 4597 btstack_linked_item_t * it; 4598 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4599 hci_connection_t * connection = (hci_connection_t *) it; 4600 4601 switch(connection->state){ 4602 case SEND_CREATE_CONNECTION: 4603 switch(connection->address_type){ 4604 #ifdef ENABLE_CLASSIC 4605 case BD_ADDR_TYPE_ACL: 4606 log_info("sending hci_create_connection"); 4607 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4608 break; 4609 #endif 4610 default: 4611 #ifdef ENABLE_BLE 4612 #ifdef ENABLE_LE_CENTRAL 4613 log_info("sending hci_le_create_connection"); 4614 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4615 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4616 hci_send_cmd(&hci_le_create_connection, 4617 hci_stack->le_connection_scan_interval, // conn scan interval 4618 hci_stack->le_connection_scan_window, // conn scan windows 4619 0, // don't use whitelist 4620 connection->address_type, // peer address type 4621 connection->address, // peer bd addr 4622 hci_stack->le_connection_own_addr_type, // our addr type: 4623 hci_stack->le_connection_interval_min, // conn interval min 4624 hci_stack->le_connection_interval_max, // conn interval max 4625 hci_stack->le_connection_latency, // conn latency 4626 hci_stack->le_supervision_timeout, // conn latency 4627 hci_stack->le_minimum_ce_length, // min ce length 4628 hci_stack->le_maximum_ce_length // max ce length 4629 ); 4630 connection->state = SENT_CREATE_CONNECTION; 4631 #endif 4632 #endif 4633 break; 4634 } 4635 return true; 4636 4637 #ifdef ENABLE_CLASSIC 4638 case RECEIVED_CONNECTION_REQUEST: 4639 connection->role = HCI_ROLE_SLAVE; 4640 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4641 log_info("sending hci_accept_connection_request"); 4642 connection->state = ACCEPTED_CONNECTION_REQUEST; 4643 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4644 } 4645 return true; 4646 #endif 4647 4648 #ifdef ENABLE_BLE 4649 #ifdef ENABLE_LE_CENTRAL 4650 case SEND_CANCEL_CONNECTION: 4651 connection->state = SENT_CANCEL_CONNECTION; 4652 hci_send_cmd(&hci_le_create_connection_cancel); 4653 return true; 4654 #endif 4655 #endif 4656 case SEND_DISCONNECT: 4657 connection->state = SENT_DISCONNECT; 4658 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4659 return true; 4660 4661 default: 4662 break; 4663 } 4664 4665 // no further commands if connection is about to get shut down 4666 if (connection->state == SENT_DISCONNECT) continue; 4667 4668 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4669 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4670 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4671 return true; 4672 } 4673 4674 #ifdef ENABLE_CLASSIC 4675 4676 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4677 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4678 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4679 return true; 4680 } 4681 4682 // Handling link key request requires remote supported features 4683 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4684 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4686 4687 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4688 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4689 if (have_link_key && security_level_sufficient){ 4690 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4691 } else { 4692 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4693 } 4694 return true; 4695 } 4696 4697 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4698 log_info("denying to pin request"); 4699 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4700 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4701 return true; 4702 } 4703 4704 // security assessment requires remote features 4705 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4706 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4707 hci_ssp_assess_security_on_io_cap_request(connection); 4708 // 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 4709 } 4710 4711 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4712 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4713 // set authentication requirements: 4714 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4715 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4716 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4717 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4718 authreq |= 1; 4719 } 4720 bool bonding = hci_stack->bondable; 4721 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4722 // if we have received IO Cap Response, we're in responder role 4723 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4724 if (bonding && !remote_bonding){ 4725 log_info("Remote not bonding, dropping local flag"); 4726 bonding = false; 4727 } 4728 } 4729 if (bonding){ 4730 if (connection->bonding_flags & BONDING_DEDICATED){ 4731 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4732 } else { 4733 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4734 } 4735 } 4736 uint8_t have_oob_data = 0; 4737 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4738 if (connection->classic_oob_c_192 != NULL){ 4739 have_oob_data |= 1; 4740 } 4741 if (connection->classic_oob_c_256 != NULL){ 4742 have_oob_data |= 2; 4743 } 4744 #endif 4745 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4746 return true; 4747 } 4748 4749 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4750 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4751 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4752 return true; 4753 } 4754 4755 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4756 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4757 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4758 const uint8_t zero[16] = { 0 }; 4759 const uint8_t * r_192 = zero; 4760 const uint8_t * c_192 = zero; 4761 const uint8_t * r_256 = zero; 4762 const uint8_t * c_256 = zero; 4763 // verify P-256 OOB 4764 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4765 c_256 = connection->classic_oob_c_256; 4766 if (connection->classic_oob_r_256 != NULL) { 4767 r_256 = connection->classic_oob_r_256; 4768 } 4769 } 4770 // verify P-192 OOB 4771 if ((connection->classic_oob_c_192 != NULL)) { 4772 c_192 = connection->classic_oob_c_192; 4773 if (connection->classic_oob_r_192 != NULL) { 4774 r_192 = connection->classic_oob_r_192; 4775 } 4776 } 4777 4778 // assess security 4779 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4780 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4781 if (need_level_4 && !can_reach_level_4){ 4782 log_info("Level 4 required, but not possible -> abort"); 4783 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4784 // send oob negative reply 4785 c_256 = NULL; 4786 c_192 = NULL; 4787 } 4788 4789 // Reply 4790 if (c_256 != zero) { 4791 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4792 } else if (c_192 != zero){ 4793 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4794 } else { 4795 hci_stack->classic_oob_con_handle = connection->con_handle; 4796 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4797 } 4798 return true; 4799 } 4800 #endif 4801 4802 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4803 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4804 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4805 return true; 4806 } 4807 4808 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4809 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4810 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4811 return true; 4812 } 4813 4814 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4815 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4816 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4817 return true; 4818 } 4819 4820 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4821 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4822 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4823 connection->state = SENT_DISCONNECT; 4824 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4825 return true; 4826 } 4827 4828 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4829 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4830 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4831 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4832 return true; 4833 } 4834 4835 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4836 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4837 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4838 return true; 4839 } 4840 4841 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4842 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4843 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4844 return true; 4845 } 4846 4847 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4848 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4849 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4850 return true; 4851 } 4852 4853 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4854 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4855 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4856 return true; 4857 } 4858 4859 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4860 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4861 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4862 return true; 4863 } 4864 #endif 4865 4866 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4867 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4868 #ifdef ENABLE_CLASSIC 4869 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4870 #endif 4871 if (connection->state != SENT_DISCONNECT){ 4872 connection->state = SENT_DISCONNECT; 4873 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4874 return true; 4875 } 4876 } 4877 4878 #ifdef ENABLE_CLASSIC 4879 uint16_t sniff_min_interval; 4880 switch (connection->sniff_min_interval){ 4881 case 0: 4882 break; 4883 case 0xffff: 4884 connection->sniff_min_interval = 0; 4885 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4886 return true; 4887 default: 4888 sniff_min_interval = connection->sniff_min_interval; 4889 connection->sniff_min_interval = 0; 4890 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4891 return true; 4892 } 4893 4894 if (connection->sniff_subrating_max_latency != 0xffff){ 4895 uint16_t max_latency = connection->sniff_subrating_max_latency; 4896 connection->sniff_subrating_max_latency = 0; 4897 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4898 return true; 4899 } 4900 4901 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4902 uint8_t service_type = (uint8_t) connection->qos_service_type; 4903 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4904 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); 4905 return true; 4906 } 4907 4908 if (connection->request_role != HCI_ROLE_INVALID){ 4909 hci_role_t role = connection->request_role; 4910 connection->request_role = HCI_ROLE_INVALID; 4911 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4912 return true; 4913 } 4914 #endif 4915 4916 #ifdef ENABLE_BLE 4917 switch (connection->le_con_parameter_update_state){ 4918 // response to L2CAP CON PARAMETER UPDATE REQUEST 4919 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4920 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4921 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4922 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4923 0x0000, 0xffff); 4924 return true; 4925 case CON_PARAMETER_UPDATE_REPLY: 4926 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4927 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4928 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4929 0x0000, 0xffff); 4930 return true; 4931 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4932 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4933 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4934 return true; 4935 default: 4936 break; 4937 } 4938 if (connection->le_phy_update_all_phys != 0xffu){ 4939 uint8_t all_phys = connection->le_phy_update_all_phys; 4940 connection->le_phy_update_all_phys = 0xff; 4941 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); 4942 return true; 4943 } 4944 #endif 4945 } 4946 return false; 4947 } 4948 4949 static void hci_run(void){ 4950 4951 bool done; 4952 4953 // send continuation fragments first, as they block the prepared packet buffer 4954 done = hci_run_acl_fragments(); 4955 if (done) return; 4956 4957 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4958 // send host num completed packets next as they don't require num_cmd_packets > 0 4959 if (!hci_can_send_comand_packet_transport()) return; 4960 if (hci_stack->host_completed_packets){ 4961 hci_host_num_completed_packets(); 4962 return; 4963 } 4964 #endif 4965 4966 if (!hci_can_send_command_packet_now()) return; 4967 4968 // global/non-connection oriented commands 4969 4970 4971 #ifdef ENABLE_CLASSIC 4972 // general gap classic 4973 done = hci_run_general_gap_classic(); 4974 if (done) return; 4975 #endif 4976 4977 #ifdef ENABLE_BLE 4978 // general gap le 4979 done = hci_run_general_gap_le(); 4980 if (done) return; 4981 #endif 4982 4983 // send pending HCI commands 4984 done = hci_run_general_pending_commands(); 4985 if (done) return; 4986 4987 // stack state sub statemachines 4988 hci_connection_t * connection; 4989 switch (hci_stack->state){ 4990 case HCI_STATE_INITIALIZING: 4991 hci_initializing_run(); 4992 break; 4993 4994 case HCI_STATE_HALTING: 4995 4996 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4997 switch (hci_stack->substate){ 4998 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4999 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5000 5001 #ifdef ENABLE_BLE 5002 #ifdef ENABLE_LE_CENTRAL 5003 // free whitelist entries 5004 { 5005 btstack_linked_list_iterator_t lit; 5006 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5007 while (btstack_linked_list_iterator_has_next(&lit)){ 5008 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5009 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5010 btstack_memory_whitelist_entry_free(entry); 5011 } 5012 } 5013 #endif 5014 #endif 5015 // close all open connections 5016 connection = (hci_connection_t *) hci_stack->connections; 5017 if (connection){ 5018 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5019 if (!hci_can_send_command_packet_now()) return; 5020 5021 // check state 5022 if (connection->state == SENT_DISCONNECT) return; 5023 connection->state = SENT_DISCONNECT; 5024 5025 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5026 5027 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5028 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5029 5030 // ... which would be ignored anyway as we shutdown (free) the connection now 5031 hci_shutdown_connection(connection); 5032 5033 // finally, send the disconnect command 5034 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5035 return; 5036 } 5037 5038 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5039 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5040 log_info("HCI_STATE_HALTING: wait 50 ms"); 5041 hci_stack->substate = HCI_HALTING_W4_TIMER; 5042 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5043 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5044 btstack_run_loop_add_timer(&hci_stack->timeout); 5045 break; 5046 } 5047 5048 /* fall through */ 5049 5050 case HCI_HALTING_CLOSE: 5051 log_info("HCI_STATE_HALTING, calling off"); 5052 5053 // switch mode 5054 hci_power_control_off(); 5055 5056 log_info("HCI_STATE_HALTING, emitting state"); 5057 hci_emit_state(); 5058 log_info("HCI_STATE_HALTING, done"); 5059 break; 5060 5061 case HCI_HALTING_W4_TIMER: 5062 // keep waiting 5063 5064 break; 5065 default: 5066 break; 5067 } 5068 5069 break; 5070 5071 case HCI_STATE_FALLING_ASLEEP: 5072 switch(hci_stack->substate) { 5073 case HCI_FALLING_ASLEEP_DISCONNECT: 5074 log_info("HCI_STATE_FALLING_ASLEEP"); 5075 // close all open connections 5076 connection = (hci_connection_t *) hci_stack->connections; 5077 if (connection){ 5078 5079 // send disconnect 5080 if (!hci_can_send_command_packet_now()) return; 5081 5082 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5083 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5084 5085 // send disconnected event right away - causes higher layer connections to get closed, too. 5086 hci_shutdown_connection(connection); 5087 return; 5088 } 5089 5090 if (hci_classic_supported()){ 5091 // disable page and inquiry scan 5092 if (!hci_can_send_command_packet_now()) return; 5093 5094 log_info("HCI_STATE_HALTING, disabling inq scans"); 5095 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5096 5097 // continue in next sub state 5098 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5099 break; 5100 } 5101 5102 /* fall through */ 5103 5104 case HCI_FALLING_ASLEEP_COMPLETE: 5105 log_info("HCI_STATE_HALTING, calling sleep"); 5106 // switch mode 5107 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5108 hci_emit_state(); 5109 break; 5110 5111 default: 5112 break; 5113 } 5114 break; 5115 5116 default: 5117 break; 5118 } 5119 } 5120 5121 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5122 // house-keeping 5123 5124 #ifdef ENABLE_CLASSIC 5125 bd_addr_t addr; 5126 hci_connection_t * conn; 5127 #endif 5128 #ifdef ENABLE_LE_CENTRAL 5129 uint8_t initiator_filter_policy; 5130 #endif 5131 5132 uint16_t opcode = little_endian_read_16(packet, 0); 5133 switch (opcode) { 5134 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5135 hci_stack->loopback_mode = packet[3]; 5136 break; 5137 5138 #ifdef ENABLE_CLASSIC 5139 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5140 reverse_bd_addr(&packet[3], addr); 5141 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5142 5143 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5144 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5145 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5146 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5147 } 5148 5149 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5150 if (!conn) { 5151 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5152 if (!conn) { 5153 // notify client that alloc failed 5154 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5155 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5156 } 5157 conn->state = SEND_CREATE_CONNECTION; 5158 conn->role = HCI_ROLE_MASTER; 5159 } 5160 5161 conn->con_handle = HCI_CON_HANDLE_INVALID; 5162 conn->role = HCI_ROLE_INVALID; 5163 5164 log_info("conn state %u", conn->state); 5165 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5166 switch (conn->state) { 5167 // if connection active exists 5168 case OPEN: 5169 // and OPEN, emit connection complete command 5170 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5171 // packet not sent to controller 5172 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5173 case RECEIVED_DISCONNECTION_COMPLETE: 5174 // create connection triggered in disconnect complete event, let's do it now 5175 break; 5176 case SEND_CREATE_CONNECTION: 5177 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5178 break; 5179 default: 5180 // otherwise, just ignore as it is already in the open process 5181 // packet not sent to controller 5182 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5183 } 5184 conn->state = SENT_CREATE_CONNECTION; 5185 5186 // track outgoing connection 5187 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5188 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5189 break; 5190 5191 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5192 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5193 // setup_synchronous_connection? Voice setting at offset 22 5194 // TODO: compare to current setting if sco connection already active 5195 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5196 break; 5197 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5198 // accept_synchronous_connection? Voice setting at offset 18 5199 // TODO: compare to current setting if sco connection already active 5200 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5201 break; 5202 #endif 5203 #endif 5204 5205 #ifdef ENABLE_BLE 5206 #ifdef ENABLE_LE_CENTRAL 5207 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5208 // white list used? 5209 initiator_filter_policy = packet[7]; 5210 switch (initiator_filter_policy) { 5211 case 0: 5212 // whitelist not used 5213 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5214 break; 5215 case 1: 5216 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5217 break; 5218 default: 5219 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5220 break; 5221 } 5222 // track outgoing connection 5223 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5224 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5225 break; 5226 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5227 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5228 break; 5229 #endif 5230 #endif 5231 default: 5232 break; 5233 } 5234 5235 hci_stack->num_cmd_packets--; 5236 5237 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5238 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5239 if (err != 0){ 5240 return ERROR_CODE_HARDWARE_FAILURE; 5241 } 5242 return ERROR_CODE_SUCCESS; 5243 } 5244 5245 // disconnect because of security block 5246 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5247 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5248 if (!connection) return; 5249 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5250 } 5251 5252 5253 // Configure Secure Simple Pairing 5254 5255 #ifdef ENABLE_CLASSIC 5256 5257 // enable will enable SSP during init 5258 void gap_ssp_set_enable(int enable){ 5259 hci_stack->ssp_enable = enable; 5260 } 5261 5262 static int hci_local_ssp_activated(void){ 5263 return gap_ssp_supported() && hci_stack->ssp_enable; 5264 } 5265 5266 // if set, BTstack will respond to io capability request using authentication requirement 5267 void gap_ssp_set_io_capability(int io_capability){ 5268 hci_stack->ssp_io_capability = io_capability; 5269 } 5270 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5271 hci_stack->ssp_authentication_requirement = authentication_requirement; 5272 } 5273 5274 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5275 void gap_ssp_set_auto_accept(int auto_accept){ 5276 hci_stack->ssp_auto_accept = auto_accept; 5277 } 5278 5279 void gap_secure_connections_enable(bool enable){ 5280 hci_stack->secure_connections_enable = enable; 5281 } 5282 5283 #endif 5284 5285 // va_list part of hci_send_cmd 5286 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5287 if (!hci_can_send_command_packet_now()){ 5288 log_error("hci_send_cmd called but cannot send packet now"); 5289 return ERROR_CODE_COMMAND_DISALLOWED; 5290 } 5291 5292 // for HCI INITIALIZATION 5293 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5294 hci_stack->last_cmd_opcode = cmd->opcode; 5295 5296 hci_reserve_packet_buffer(); 5297 uint8_t * packet = hci_stack->hci_packet_buffer; 5298 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5299 uint8_t status = hci_send_cmd_packet(packet, size); 5300 5301 // release packet buffer on error or for synchronous transport implementations 5302 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5303 hci_release_packet_buffer(); 5304 hci_emit_transport_packet_sent(); 5305 } 5306 5307 return status; 5308 } 5309 5310 /** 5311 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5312 */ 5313 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5314 va_list argptr; 5315 va_start(argptr, cmd); 5316 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5317 va_end(argptr); 5318 return status; 5319 } 5320 5321 // Create various non-HCI events. 5322 // TODO: generalize, use table similar to hci_create_command 5323 5324 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5325 // dump packet 5326 if (dump) { 5327 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5328 } 5329 5330 // dispatch to all event handlers 5331 btstack_linked_list_iterator_t it; 5332 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5333 while (btstack_linked_list_iterator_has_next(&it)){ 5334 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5335 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5336 } 5337 } 5338 5339 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5340 if (!hci_stack->acl_packet_handler) return; 5341 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5342 } 5343 5344 #ifdef ENABLE_CLASSIC 5345 static void hci_notify_if_sco_can_send_now(void){ 5346 // notify SCO sender if waiting 5347 if (!hci_stack->sco_waiting_for_can_send_now) return; 5348 if (hci_can_send_sco_packet_now()){ 5349 hci_stack->sco_waiting_for_can_send_now = 0; 5350 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5351 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5352 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5353 } 5354 } 5355 5356 // parsing end emitting has been merged to reduce code size 5357 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5358 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5359 5360 uint8_t * eir_data; 5361 ad_context_t context; 5362 const uint8_t * name; 5363 uint8_t name_len; 5364 5365 if (size < 3) return; 5366 5367 int event_type = hci_event_packet_get_type(packet); 5368 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5369 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5370 5371 switch (event_type){ 5372 case HCI_EVENT_INQUIRY_RESULT: 5373 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5374 if (size != (3 + (num_responses * 14))) return; 5375 break; 5376 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5377 if (size != 257) return; 5378 if (num_responses != 1) return; 5379 break; 5380 default: 5381 return; 5382 } 5383 5384 // event[1] is set at the end 5385 int i; 5386 for (i=0; i<num_responses;i++){ 5387 memset(event, 0, sizeof(event)); 5388 event[0] = GAP_EVENT_INQUIRY_RESULT; 5389 uint8_t event_size = 27; // if name is not set by EIR 5390 5391 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5392 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5393 (void)memcpy(&event[9], 5394 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5395 3); // class of device 5396 (void)memcpy(&event[12], 5397 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5398 2); // clock offset 5399 5400 switch (event_type){ 5401 case HCI_EVENT_INQUIRY_RESULT: 5402 // 14,15,16,17 = 0, size 18 5403 break; 5404 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5405 event[14] = 1; 5406 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5407 // 16,17 = 0, size 18 5408 break; 5409 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5410 event[14] = 1; 5411 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5412 // EIR packets only contain a single inquiry response 5413 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5414 name = NULL; 5415 // Iterate over EIR data 5416 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5417 uint8_t data_type = ad_iterator_get_data_type(&context); 5418 uint8_t data_size = ad_iterator_get_data_len(&context); 5419 const uint8_t * data = ad_iterator_get_data(&context); 5420 // Prefer Complete Local Name over Shortened Local Name 5421 switch (data_type){ 5422 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5423 if (name) continue; 5424 /* fall through */ 5425 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5426 name = data; 5427 name_len = data_size; 5428 break; 5429 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5430 if (data_size != 8) break; 5431 event[16] = 1; 5432 memcpy(&event[17], data, 8); 5433 break; 5434 default: 5435 break; 5436 } 5437 } 5438 if (name){ 5439 event[25] = 1; 5440 // truncate name if needed 5441 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5442 event[26] = len; 5443 (void)memcpy(&event[27], name, len); 5444 event_size += len; 5445 } 5446 break; 5447 default: 5448 return; 5449 } 5450 event[1] = event_size - 2; 5451 hci_emit_event(event, event_size, 1); 5452 } 5453 } 5454 #endif 5455 5456 void hci_emit_state(void){ 5457 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5458 uint8_t event[3]; 5459 event[0] = BTSTACK_EVENT_STATE; 5460 event[1] = sizeof(event) - 2u; 5461 event[2] = hci_stack->state; 5462 hci_emit_event(event, sizeof(event), 1); 5463 } 5464 5465 #ifdef ENABLE_CLASSIC 5466 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5467 uint8_t event[13]; 5468 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5469 event[1] = sizeof(event) - 2; 5470 event[2] = status; 5471 little_endian_store_16(event, 3, con_handle); 5472 reverse_bd_addr(address, &event[5]); 5473 event[11] = 1; // ACL connection 5474 event[12] = 0; // encryption disabled 5475 hci_emit_event(event, sizeof(event), 1); 5476 } 5477 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5478 if (disable_l2cap_timeouts) return; 5479 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5480 uint8_t event[4]; 5481 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5482 event[1] = sizeof(event) - 2; 5483 little_endian_store_16(event, 2, conn->con_handle); 5484 hci_emit_event(event, sizeof(event), 1); 5485 } 5486 #endif 5487 5488 #ifdef ENABLE_BLE 5489 #ifdef ENABLE_LE_CENTRAL 5490 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){ 5491 uint8_t event[21]; 5492 event[0] = HCI_EVENT_LE_META; 5493 event[1] = sizeof(event) - 2u; 5494 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5495 event[3] = status; 5496 little_endian_store_16(event, 4, con_handle); 5497 event[6] = 0; // TODO: role 5498 event[7] = address_type; 5499 reverse_bd_addr(address, &event[8]); 5500 little_endian_store_16(event, 14, 0); // interval 5501 little_endian_store_16(event, 16, 0); // latency 5502 little_endian_store_16(event, 18, 0); // supervision timeout 5503 event[20] = 0; // master clock accuracy 5504 hci_emit_event(event, sizeof(event), 1); 5505 } 5506 #endif 5507 #endif 5508 5509 static void hci_emit_transport_packet_sent(void){ 5510 // notify upper stack that it might be possible to send again 5511 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5512 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5513 } 5514 5515 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5516 uint8_t event[6]; 5517 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5518 event[1] = sizeof(event) - 2u; 5519 event[2] = 0; // status = OK 5520 little_endian_store_16(event, 3, con_handle); 5521 event[5] = reason; 5522 hci_emit_event(event, sizeof(event), 1); 5523 } 5524 5525 static void hci_emit_nr_connections_changed(void){ 5526 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5527 uint8_t event[3]; 5528 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5529 event[1] = sizeof(event) - 2u; 5530 event[2] = nr_hci_connections(); 5531 hci_emit_event(event, sizeof(event), 1); 5532 } 5533 5534 static void hci_emit_hci_open_failed(void){ 5535 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5536 uint8_t event[2]; 5537 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5538 event[1] = sizeof(event) - 2u; 5539 hci_emit_event(event, sizeof(event), 1); 5540 } 5541 5542 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5543 log_info("hci_emit_dedicated_bonding_result %u ", status); 5544 uint8_t event[9]; 5545 int pos = 0; 5546 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5547 event[pos++] = sizeof(event) - 2u; 5548 event[pos++] = status; 5549 reverse_bd_addr(address, &event[pos]); 5550 hci_emit_event(event, sizeof(event), 1); 5551 } 5552 5553 5554 #ifdef ENABLE_CLASSIC 5555 5556 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5557 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5558 uint8_t event[5]; 5559 int pos = 0; 5560 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5561 event[pos++] = sizeof(event) - 2; 5562 little_endian_store_16(event, 2, con_handle); 5563 pos += 2; 5564 event[pos++] = level; 5565 hci_emit_event(event, sizeof(event), 1); 5566 } 5567 5568 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5569 if (!connection) return LEVEL_0; 5570 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5571 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5572 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5573 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5574 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5575 // LEVEL 4 always requires 128 bit encrytion key size 5576 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5577 security_level = LEVEL_3; 5578 } 5579 return security_level; 5580 } 5581 5582 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5583 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5584 uint8_t event[3]; 5585 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5586 event[1] = sizeof(event) - 2; 5587 event[2] = enabled; 5588 hci_emit_event(event, sizeof(event), 1); 5589 } 5590 5591 // query if remote side supports eSCO 5592 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5593 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5594 if (!connection) return false; 5595 return (connection->remote_supported_features[0] & 1) != 0; 5596 } 5597 5598 static bool hci_ssp_supported(hci_connection_t * connection){ 5599 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5600 return (connection->bonding_flags & mask) == mask; 5601 } 5602 5603 // query if remote side supports SSP 5604 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5605 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5606 if (!connection) return false; 5607 return hci_ssp_supported(connection) ? 1 : 0; 5608 } 5609 5610 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5611 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5612 } 5613 5614 /** 5615 * Check if remote supported features query has completed 5616 */ 5617 bool hci_remote_features_available(hci_con_handle_t handle){ 5618 hci_connection_t * connection = hci_connection_for_handle(handle); 5619 if (!connection) return false; 5620 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5621 } 5622 5623 /** 5624 * Trigger remote supported features query 5625 */ 5626 void hci_remote_features_query(hci_con_handle_t con_handle){ 5627 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5628 if (!connection) return; 5629 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) != 0) return; 5630 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5631 hci_run(); 5632 } 5633 5634 // GAP API 5635 /** 5636 * @bbrief enable/disable bonding. default is enabled 5637 * @praram enabled 5638 */ 5639 void gap_set_bondable_mode(int enable){ 5640 hci_stack->bondable = enable ? 1 : 0; 5641 } 5642 /** 5643 * @brief Get bondable mode. 5644 * @return 1 if bondable 5645 */ 5646 int gap_get_bondable_mode(void){ 5647 return hci_stack->bondable; 5648 } 5649 5650 /** 5651 * @brief map link keys to security levels 5652 */ 5653 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5654 switch (link_key_type){ 5655 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5656 return LEVEL_4; 5657 case COMBINATION_KEY: 5658 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5659 return LEVEL_3; 5660 default: 5661 return LEVEL_2; 5662 } 5663 } 5664 5665 /** 5666 * @brief map link keys to secure connection yes/no 5667 */ 5668 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5669 switch (link_key_type){ 5670 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5671 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5672 return 1; 5673 default: 5674 return 0; 5675 } 5676 } 5677 5678 /** 5679 * @brief map link keys to authenticated 5680 */ 5681 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5682 switch (link_key_type){ 5683 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5684 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5685 return 1; 5686 default: 5687 return 0; 5688 } 5689 } 5690 5691 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5692 log_info("gap_mitm_protection_required_for_security_level %u", level); 5693 return level > LEVEL_2; 5694 } 5695 5696 /** 5697 * @brief get current security level 5698 */ 5699 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5700 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5701 if (!connection) return LEVEL_0; 5702 return gap_security_level_for_connection(connection); 5703 } 5704 5705 /** 5706 * @brief request connection to device to 5707 * @result GAP_AUTHENTICATION_RESULT 5708 */ 5709 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5710 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5711 if (!connection){ 5712 hci_emit_security_level(con_handle, LEVEL_0); 5713 return; 5714 } 5715 5716 btstack_assert(hci_is_le_connection(connection) == false); 5717 5718 // 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) 5719 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5720 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5721 requested_level = LEVEL_4; 5722 } 5723 5724 gap_security_level_t current_level = gap_security_level(con_handle); 5725 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5726 requested_level, connection->requested_security_level, current_level); 5727 5728 // authentication active if authentication request was sent or planned level > 0 5729 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5730 if (authentication_active){ 5731 // authentication already active 5732 if (connection->requested_security_level < requested_level){ 5733 // increase requested level as new level is higher 5734 // TODO: handle re-authentication when done 5735 connection->requested_security_level = requested_level; 5736 } 5737 } else { 5738 // no request active, notify if security sufficient 5739 if (requested_level <= current_level){ 5740 hci_emit_security_level(con_handle, current_level); 5741 return; 5742 } 5743 5744 // store request 5745 connection->requested_security_level = requested_level; 5746 5747 // request remote features if not already active 5748 hci_remote_features_query(con_handle); 5749 5750 // start to authenticate connection 5751 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5752 hci_run(); 5753 } 5754 } 5755 5756 /** 5757 * @brief start dedicated bonding with device. disconnect after bonding 5758 * @param device 5759 * @param request MITM protection 5760 * @result GAP_DEDICATED_BONDING_COMPLETE 5761 */ 5762 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5763 5764 // create connection state machine 5765 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5766 5767 if (!connection){ 5768 return BTSTACK_MEMORY_ALLOC_FAILED; 5769 } 5770 5771 // delete linkn key 5772 gap_drop_link_key_for_bd_addr(device); 5773 5774 // configure LEVEL_2/3, dedicated bonding 5775 connection->state = SEND_CREATE_CONNECTION; 5776 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5777 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5778 connection->bonding_flags = BONDING_DEDICATED; 5779 5780 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5781 5782 // handle: connnection failure (connection complete != ok) 5783 // handle: authentication failure 5784 // handle: disconnect on done 5785 5786 hci_run(); 5787 5788 return 0; 5789 } 5790 5791 void gap_set_local_name(const char * local_name){ 5792 hci_stack->local_name = local_name; 5793 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5794 // also update EIR if not set by user 5795 if (hci_stack->eir_data == NULL){ 5796 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5797 } 5798 hci_run(); 5799 } 5800 #endif 5801 5802 5803 #ifdef ENABLE_BLE 5804 5805 #ifdef ENABLE_LE_CENTRAL 5806 void gap_start_scan(void){ 5807 hci_stack->le_scanning_enabled = true; 5808 hci_run(); 5809 } 5810 5811 void gap_stop_scan(void){ 5812 hci_stack->le_scanning_enabled = false; 5813 hci_run(); 5814 } 5815 5816 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5817 hci_stack->le_scan_type = scan_type; 5818 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5819 hci_stack->le_scan_interval = scan_interval; 5820 hci_stack->le_scan_window = scan_window; 5821 hci_stack->le_scanning_param_update = true; 5822 hci_run(); 5823 } 5824 5825 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5826 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5827 } 5828 5829 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5830 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5831 if (!conn){ 5832 // disallow if le connection is already outgoing 5833 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5834 log_error("le connection already active"); 5835 return ERROR_CODE_COMMAND_DISALLOWED; 5836 } 5837 5838 log_info("gap_connect: no connection exists yet, creating context"); 5839 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5840 if (!conn){ 5841 // notify client that alloc failed 5842 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5843 log_info("gap_connect: failed to alloc hci_connection_t"); 5844 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5845 } 5846 5847 // set le connecting state 5848 if (hci_is_le_connection_type(addr_type)){ 5849 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5850 } 5851 5852 conn->state = SEND_CREATE_CONNECTION; 5853 log_info("gap_connect: send create connection next"); 5854 hci_run(); 5855 return ERROR_CODE_SUCCESS; 5856 } 5857 5858 if (!hci_is_le_connection(conn) || 5859 (conn->state == SEND_CREATE_CONNECTION) || 5860 (conn->state == SENT_CREATE_CONNECTION)) { 5861 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5862 log_error("gap_connect: classic connection or connect is already being created"); 5863 return GATT_CLIENT_IN_WRONG_STATE; 5864 } 5865 5866 // check if connection was just disconnected 5867 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5868 log_info("gap_connect: send create connection (again)"); 5869 conn->state = SEND_CREATE_CONNECTION; 5870 hci_run(); 5871 return ERROR_CODE_SUCCESS; 5872 } 5873 5874 log_info("gap_connect: context exists with state %u", conn->state); 5875 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5876 hci_run(); 5877 return ERROR_CODE_SUCCESS; 5878 } 5879 5880 // @assumption: only a single outgoing LE Connection exists 5881 static hci_connection_t * gap_get_outgoing_connection(void){ 5882 btstack_linked_item_t *it; 5883 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5884 hci_connection_t * conn = (hci_connection_t *) it; 5885 if (!hci_is_le_connection(conn)) continue; 5886 switch (conn->state){ 5887 case SEND_CREATE_CONNECTION: 5888 case SENT_CREATE_CONNECTION: 5889 case SENT_CANCEL_CONNECTION: 5890 return conn; 5891 default: 5892 break; 5893 }; 5894 } 5895 return NULL; 5896 } 5897 5898 uint8_t gap_connect_cancel(void){ 5899 hci_connection_t * conn = gap_get_outgoing_connection(); 5900 if (!conn) return 0; 5901 switch (conn->state){ 5902 case SEND_CREATE_CONNECTION: 5903 // skip sending create connection and emit event instead 5904 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5905 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5906 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5907 btstack_memory_hci_connection_free( conn ); 5908 break; 5909 case SENT_CREATE_CONNECTION: 5910 // request to send cancel connection 5911 conn->state = SEND_CANCEL_CONNECTION; 5912 hci_run(); 5913 break; 5914 default: 5915 break; 5916 } 5917 return 0; 5918 } 5919 #endif 5920 5921 #ifdef ENABLE_LE_CENTRAL 5922 /** 5923 * @brief Set connection parameters for outgoing connections 5924 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5925 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5926 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5927 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5928 * @param conn_latency, default: 4 5929 * @param supervision_timeout (unit: 10ms), default: 720 ms 5930 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5931 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5932 */ 5933 5934 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5935 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5936 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5937 hci_stack->le_connection_scan_interval = conn_scan_interval; 5938 hci_stack->le_connection_scan_window = conn_scan_window; 5939 hci_stack->le_connection_interval_min = conn_interval_min; 5940 hci_stack->le_connection_interval_max = conn_interval_max; 5941 hci_stack->le_connection_latency = conn_latency; 5942 hci_stack->le_supervision_timeout = supervision_timeout; 5943 hci_stack->le_minimum_ce_length = min_ce_length; 5944 hci_stack->le_maximum_ce_length = max_ce_length; 5945 } 5946 #endif 5947 5948 /** 5949 * @brief Updates the connection parameters for a given LE connection 5950 * @param handle 5951 * @param conn_interval_min (unit: 1.25ms) 5952 * @param conn_interval_max (unit: 1.25ms) 5953 * @param conn_latency 5954 * @param supervision_timeout (unit: 10ms) 5955 * @returns 0 if ok 5956 */ 5957 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5958 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5959 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5960 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5961 connection->le_conn_interval_min = conn_interval_min; 5962 connection->le_conn_interval_max = conn_interval_max; 5963 connection->le_conn_latency = conn_latency; 5964 connection->le_supervision_timeout = supervision_timeout; 5965 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5966 hci_run(); 5967 return 0; 5968 } 5969 5970 /** 5971 * @brief Request an update of the connection parameter for a given LE connection 5972 * @param handle 5973 * @param conn_interval_min (unit: 1.25ms) 5974 * @param conn_interval_max (unit: 1.25ms) 5975 * @param conn_latency 5976 * @param supervision_timeout (unit: 10ms) 5977 * @returns 0 if ok 5978 */ 5979 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5980 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5981 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5982 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5983 connection->le_conn_interval_min = conn_interval_min; 5984 connection->le_conn_interval_max = conn_interval_max; 5985 connection->le_conn_latency = conn_latency; 5986 connection->le_supervision_timeout = supervision_timeout; 5987 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5988 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5989 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5990 return 0; 5991 } 5992 5993 #ifdef ENABLE_LE_PERIPHERAL 5994 5995 /** 5996 * @brief Set Advertisement Data 5997 * @param advertising_data_length 5998 * @param advertising_data (max 31 octets) 5999 * @note data is not copied, pointer has to stay valid 6000 */ 6001 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6002 hci_stack->le_advertisements_data_len = advertising_data_length; 6003 hci_stack->le_advertisements_data = advertising_data; 6004 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6005 hci_run(); 6006 } 6007 6008 /** 6009 * @brief Set Scan Response Data 6010 * @param advertising_data_length 6011 * @param advertising_data (max 31 octets) 6012 * @note data is not copied, pointer has to stay valid 6013 */ 6014 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6015 hci_stack->le_scan_response_data_len = scan_response_data_length; 6016 hci_stack->le_scan_response_data = scan_response_data; 6017 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6018 hci_run(); 6019 } 6020 6021 /** 6022 * @brief Set Advertisement Parameters 6023 * @param adv_int_min 6024 * @param adv_int_max 6025 * @param adv_type 6026 * @param direct_address_type 6027 * @param direct_address 6028 * @param channel_map 6029 * @param filter_policy 6030 * 6031 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6032 */ 6033 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6034 uint8_t direct_address_typ, bd_addr_t direct_address, 6035 uint8_t channel_map, uint8_t filter_policy) { 6036 6037 hci_stack->le_advertisements_interval_min = adv_int_min; 6038 hci_stack->le_advertisements_interval_max = adv_int_max; 6039 hci_stack->le_advertisements_type = adv_type; 6040 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6041 hci_stack->le_advertisements_channel_map = channel_map; 6042 hci_stack->le_advertisements_filter_policy = filter_policy; 6043 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6044 6); 6045 6046 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6047 hci_run(); 6048 } 6049 6050 /** 6051 * @brief Enable/Disable Advertisements 6052 * @param enabled 6053 */ 6054 void gap_advertisements_enable(int enabled){ 6055 hci_stack->le_advertisements_enabled = enabled != 0; 6056 hci_update_advertisements_enabled_for_current_roles(); 6057 hci_run(); 6058 } 6059 6060 #endif 6061 6062 void hci_le_set_own_address_type(uint8_t own_address_type){ 6063 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6064 if (own_address_type == hci_stack->le_own_addr_type) return; 6065 hci_stack->le_own_addr_type = own_address_type; 6066 6067 #ifdef ENABLE_LE_PERIPHERAL 6068 // update advertisement parameters, too 6069 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6070 hci_run(); 6071 #endif 6072 #ifdef ENABLE_LE_CENTRAL 6073 // note: we don't update scan parameters or modify ongoing connection attempts 6074 #endif 6075 } 6076 6077 void hci_le_random_address_set(const bd_addr_t random_address){ 6078 memcpy(hci_stack->le_random_address, random_address, 6); 6079 hci_stack->le_random_address_set = true; 6080 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6081 hci_run(); 6082 } 6083 6084 #endif 6085 6086 uint8_t gap_disconnect(hci_con_handle_t handle){ 6087 hci_connection_t * conn = hci_connection_for_handle(handle); 6088 if (!conn){ 6089 hci_emit_disconnection_complete(handle, 0); 6090 return 0; 6091 } 6092 // ignore if already disconnected 6093 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6094 return 0; 6095 } 6096 conn->state = SEND_DISCONNECT; 6097 hci_run(); 6098 return 0; 6099 } 6100 6101 int gap_read_rssi(hci_con_handle_t con_handle){ 6102 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6103 if (hci_connection == NULL) return 0; 6104 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6105 hci_run(); 6106 return 1; 6107 } 6108 6109 /** 6110 * @brief Get connection type 6111 * @param con_handle 6112 * @result connection_type 6113 */ 6114 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6115 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6116 if (!conn) return GAP_CONNECTION_INVALID; 6117 switch (conn->address_type){ 6118 case BD_ADDR_TYPE_LE_PUBLIC: 6119 case BD_ADDR_TYPE_LE_RANDOM: 6120 return GAP_CONNECTION_LE; 6121 case BD_ADDR_TYPE_SCO: 6122 return GAP_CONNECTION_SCO; 6123 case BD_ADDR_TYPE_ACL: 6124 return GAP_CONNECTION_ACL; 6125 default: 6126 return GAP_CONNECTION_INVALID; 6127 } 6128 } 6129 6130 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6131 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6132 if (!conn) return HCI_ROLE_INVALID; 6133 return (hci_role_t) conn->role; 6134 } 6135 6136 6137 #ifdef ENABLE_CLASSIC 6138 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6139 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6140 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6141 conn->request_role = role; 6142 hci_run(); 6143 return ERROR_CODE_SUCCESS; 6144 } 6145 #endif 6146 6147 #ifdef ENABLE_BLE 6148 6149 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){ 6150 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6151 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6152 6153 conn->le_phy_update_all_phys = all_phys; 6154 conn->le_phy_update_tx_phys = tx_phys; 6155 conn->le_phy_update_rx_phys = rx_phys; 6156 conn->le_phy_update_phy_options = phy_options; 6157 6158 hci_run(); 6159 6160 return 0; 6161 } 6162 6163 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6164 // check if already in list 6165 btstack_linked_list_iterator_t it; 6166 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6167 while (btstack_linked_list_iterator_has_next(&it)) { 6168 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6169 if (entry->address_type != address_type) { 6170 continue; 6171 } 6172 if (memcmp(entry->address, address, 6) != 0) { 6173 continue; 6174 } 6175 // disallow if already scheduled to add 6176 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6177 return ERROR_CODE_COMMAND_DISALLOWED; 6178 } 6179 // still on controller, but scheduled to remove -> re-add 6180 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6181 return ERROR_CODE_SUCCESS; 6182 } 6183 // alloc and add to list 6184 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6185 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6186 entry->address_type = address_type; 6187 (void)memcpy(entry->address, address, 6); 6188 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6189 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6190 return ERROR_CODE_SUCCESS; 6191 } 6192 6193 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6194 btstack_linked_list_iterator_t it; 6195 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6196 while (btstack_linked_list_iterator_has_next(&it)){ 6197 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6198 if (entry->address_type != address_type) { 6199 continue; 6200 } 6201 if (memcmp(entry->address, address, 6) != 0) { 6202 continue; 6203 } 6204 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6205 // remove from controller if already present 6206 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6207 } else { 6208 // directly remove entry from whitelist 6209 btstack_linked_list_iterator_remove(&it); 6210 btstack_memory_whitelist_entry_free(entry); 6211 } 6212 return ERROR_CODE_SUCCESS; 6213 } 6214 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6215 } 6216 6217 static void hci_whitelist_clear(void){ 6218 btstack_linked_list_iterator_t it; 6219 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6220 while (btstack_linked_list_iterator_has_next(&it)){ 6221 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6222 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6223 // remove from controller if already present 6224 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6225 continue; 6226 } 6227 // directly remove entry from whitelist 6228 btstack_linked_list_iterator_remove(&it); 6229 btstack_memory_whitelist_entry_free(entry); 6230 } 6231 } 6232 6233 /** 6234 * @brief Clear Whitelist 6235 * @returns 0 if ok 6236 */ 6237 uint8_t gap_whitelist_clear(void){ 6238 hci_whitelist_clear(); 6239 hci_run(); 6240 return ERROR_CODE_SUCCESS; 6241 } 6242 6243 /** 6244 * @brief Add Device to Whitelist 6245 * @param address_typ 6246 * @param address 6247 * @returns 0 if ok 6248 */ 6249 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6250 uint8_t status = hci_whitelist_add(address_type, address); 6251 if (status){ 6252 return status; 6253 } 6254 hci_run(); 6255 return ERROR_CODE_SUCCESS; 6256 } 6257 6258 /** 6259 * @brief Remove Device from Whitelist 6260 * @param address_typ 6261 * @param address 6262 * @returns 0 if ok 6263 */ 6264 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6265 uint8_t status = hci_whitelist_remove(address_type, address); 6266 if (status){ 6267 return status; 6268 } 6269 hci_run(); 6270 return ERROR_CODE_SUCCESS; 6271 } 6272 6273 #ifdef ENABLE_LE_CENTRAL 6274 /** 6275 * @brief Connect with Whitelist 6276 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6277 * @returns - if ok 6278 */ 6279 uint8_t gap_connect_with_whitelist(void){ 6280 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6281 return ERROR_CODE_COMMAND_DISALLOWED; 6282 } 6283 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6284 hci_run(); 6285 return ERROR_CODE_SUCCESS; 6286 } 6287 6288 /** 6289 * @brief Auto Connection Establishment - Start Connecting to device 6290 * @param address_typ 6291 * @param address 6292 * @returns 0 if ok 6293 */ 6294 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6295 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6296 return ERROR_CODE_COMMAND_DISALLOWED; 6297 } 6298 6299 uint8_t status = hci_whitelist_add(address_type, address); 6300 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6301 return status; 6302 } 6303 6304 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6305 6306 hci_run(); 6307 return ERROR_CODE_SUCCESS; 6308 } 6309 6310 /** 6311 * @brief Auto Connection Establishment - Stop Connecting to device 6312 * @param address_typ 6313 * @param address 6314 * @returns 0 if ok 6315 */ 6316 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6317 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6318 return ERROR_CODE_COMMAND_DISALLOWED; 6319 } 6320 6321 hci_whitelist_remove(address_type, address); 6322 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6323 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6324 } 6325 hci_run(); 6326 return 0; 6327 } 6328 6329 /** 6330 * @brief Auto Connection Establishment - Stop everything 6331 * @note Convenience function to stop all active auto connection attempts 6332 */ 6333 uint8_t gap_auto_connection_stop_all(void){ 6334 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6335 return ERROR_CODE_COMMAND_DISALLOWED; 6336 } 6337 hci_whitelist_clear(); 6338 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6339 hci_run(); 6340 return ERROR_CODE_SUCCESS; 6341 } 6342 6343 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6344 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6345 if (!conn) return 0; 6346 return conn->le_connection_interval; 6347 } 6348 #endif 6349 #endif 6350 6351 #ifdef ENABLE_CLASSIC 6352 /** 6353 * @brief Set Extended Inquiry Response data 6354 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6355 * @note has to be done before stack starts up 6356 */ 6357 void gap_set_extended_inquiry_response(const uint8_t * data){ 6358 hci_stack->eir_data = data; 6359 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6360 hci_run(); 6361 } 6362 6363 /** 6364 * @brief Start GAP Classic Inquiry 6365 * @param duration in 1.28s units 6366 * @return 0 if ok 6367 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6368 */ 6369 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6370 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6371 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6372 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6373 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6374 } 6375 hci_stack->inquiry_state = duration_in_1280ms_units; 6376 hci_run(); 6377 return 0; 6378 } 6379 6380 /** 6381 * @brief Stop GAP Classic Inquiry 6382 * @returns 0 if ok 6383 */ 6384 int gap_inquiry_stop(void){ 6385 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6386 // emit inquiry complete event, before it even started 6387 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6388 hci_emit_event(event, sizeof(event), 1); 6389 return 0; 6390 } 6391 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6392 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6393 hci_run(); 6394 return 0; 6395 } 6396 6397 void gap_inquiry_set_lap(uint32_t lap){ 6398 hci_stack->inquiry_lap = lap; 6399 } 6400 6401 6402 /** 6403 * @brief Remote Name Request 6404 * @param addr 6405 * @param page_scan_repetition_mode 6406 * @param clock_offset only used when bit 15 is set 6407 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6408 */ 6409 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6410 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6411 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6412 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6413 hci_stack->remote_name_clock_offset = clock_offset; 6414 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6415 hci_run(); 6416 return 0; 6417 } 6418 6419 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6420 hci_stack->gap_pairing_state = state; 6421 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6422 hci_run(); 6423 return 0; 6424 } 6425 6426 /** 6427 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6428 * @param addr 6429 * @param pin_data 6430 * @param pin_len 6431 * @return 0 if ok 6432 */ 6433 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6434 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6435 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6436 hci_stack->gap_pairing_pin_len = pin_len; 6437 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6438 } 6439 6440 /** 6441 * @brief Legacy Pairing Pin Code Response 6442 * @param addr 6443 * @param pin 6444 * @return 0 if ok 6445 */ 6446 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6447 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6448 } 6449 6450 /** 6451 * @brief Abort Legacy Pairing 6452 * @param addr 6453 * @param pin 6454 * @return 0 if ok 6455 */ 6456 int gap_pin_code_negative(bd_addr_t addr){ 6457 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6458 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6459 } 6460 6461 /** 6462 * @brief SSP Passkey Response 6463 * @param addr 6464 * @param passkey 6465 * @return 0 if ok 6466 */ 6467 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6468 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6469 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6470 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6471 } 6472 6473 /** 6474 * @brief Abort SSP Passkey Entry/Pairing 6475 * @param addr 6476 * @param pin 6477 * @return 0 if ok 6478 */ 6479 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6480 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6481 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6482 } 6483 6484 /** 6485 * @brief Accept SSP Numeric Comparison 6486 * @param addr 6487 * @param passkey 6488 * @return 0 if ok 6489 */ 6490 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6491 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6492 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6493 } 6494 6495 /** 6496 * @brief Abort SSP Numeric Comparison/Pairing 6497 * @param addr 6498 * @param pin 6499 * @return 0 if ok 6500 */ 6501 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6502 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6503 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6504 } 6505 6506 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6507 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6508 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6509 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6510 connectionSetAuthenticationFlags(conn, flag); 6511 hci_run(); 6512 return ERROR_CODE_SUCCESS; 6513 } 6514 #endif 6515 6516 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6517 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6518 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6519 } 6520 6521 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6522 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6523 } 6524 #endif 6525 6526 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6527 /** 6528 * @brief Report Remote OOB Data 6529 * @param bd_addr 6530 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6531 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6532 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6533 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6534 */ 6535 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){ 6536 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6537 if (connection == NULL) { 6538 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6539 } 6540 connection->classic_oob_c_192 = c_192; 6541 connection->classic_oob_r_192 = r_192; 6542 6543 // ignore P-256 if not supported by us 6544 if (hci_stack->secure_connections_active){ 6545 connection->classic_oob_c_256 = c_256; 6546 connection->classic_oob_r_256 = r_256; 6547 } 6548 6549 return ERROR_CODE_SUCCESS; 6550 } 6551 /** 6552 * @brief Generate new OOB data 6553 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6554 */ 6555 void gap_ssp_generate_oob_data(void){ 6556 hci_stack->classic_read_local_oob_data = true; 6557 hci_run(); 6558 } 6559 6560 #endif 6561 6562 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6563 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6564 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6565 if (connection == NULL) { 6566 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6567 } 6568 6569 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6570 connection->link_key_type = type; 6571 6572 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6573 } 6574 6575 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6576 /** 6577 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6578 * @param inquiry_mode see bluetooth_defines.h 6579 */ 6580 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6581 hci_stack->inquiry_mode = inquiry_mode; 6582 } 6583 6584 /** 6585 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6586 */ 6587 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6588 hci_stack->sco_voice_setting = voice_setting; 6589 } 6590 6591 /** 6592 * @brief Get SCO Voice Setting 6593 * @return current voice setting 6594 */ 6595 uint16_t hci_get_sco_voice_setting(void){ 6596 return hci_stack->sco_voice_setting; 6597 } 6598 6599 static int hci_have_usb_transport(void){ 6600 if (!hci_stack->hci_transport) return 0; 6601 const char * transport_name = hci_stack->hci_transport->name; 6602 if (!transport_name) return 0; 6603 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6604 } 6605 6606 /** @brief Get SCO packet length for current SCO Voice setting 6607 * @note Using SCO packets of the exact length is required for USB transfer 6608 * @return Length of SCO packets in bytes (not audio frames) 6609 */ 6610 uint16_t hci_get_sco_packet_length(void){ 6611 uint16_t sco_packet_length = 0; 6612 6613 #ifdef ENABLE_SCO_OVER_HCI 6614 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6615 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6616 6617 if (hci_have_usb_transport()){ 6618 // see Core Spec for H2 USB Transfer. 6619 // 3 byte SCO header + 24 bytes per connection 6620 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6621 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6622 } else { 6623 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6624 sco_packet_length = 3 + 60 * multiplier; 6625 // assert that it still fits inside an SCO buffer 6626 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6627 sco_packet_length = 3 + 60; 6628 } 6629 } 6630 #endif 6631 6632 #ifdef HAVE_SCO_TRANSPORT 6633 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6634 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6635 sco_packet_length = 3 + 60 * multiplier; 6636 #endif 6637 return sco_packet_length; 6638 } 6639 6640 /** 6641 * @brief Sets the master/slave policy 6642 * @param policy (0: attempt to become master, 1: let connecting device decide) 6643 */ 6644 void hci_set_master_slave_policy(uint8_t policy){ 6645 hci_stack->master_slave_policy = policy; 6646 } 6647 6648 #endif 6649 6650 HCI_STATE hci_get_state(void){ 6651 return hci_stack->state; 6652 } 6653 6654 #ifdef ENABLE_CLASSIC 6655 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6656 hci_stack->gap_classic_accept_callback = accept_callback; 6657 } 6658 #endif 6659 6660 /** 6661 * @brief Set callback for Bluetooth Hardware Error 6662 */ 6663 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6664 hci_stack->hardware_error_callback = fn; 6665 } 6666 6667 void hci_disconnect_all(void){ 6668 btstack_linked_list_iterator_t it; 6669 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6670 while (btstack_linked_list_iterator_has_next(&it)){ 6671 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6672 if (con->state == SENT_DISCONNECT) continue; 6673 con->state = SEND_DISCONNECT; 6674 } 6675 hci_run(); 6676 } 6677 6678 uint16_t hci_get_manufacturer(void){ 6679 return hci_stack->manufacturer; 6680 } 6681 6682 #ifdef ENABLE_BLE 6683 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6684 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6685 if (!hci_con) return NULL; 6686 return &hci_con->sm_connection; 6687 } 6688 6689 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6690 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6691 #endif 6692 6693 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6694 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6695 if (hci_connection == NULL) return 0; 6696 if (hci_is_le_connection(hci_connection)){ 6697 #ifdef ENABLE_BLE 6698 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6699 if (sm_conn->sm_connection_encrypted) { 6700 return sm_conn->sm_actual_encryption_key_size; 6701 } 6702 #endif 6703 } else { 6704 #ifdef ENABLE_CLASSIC 6705 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6706 return hci_connection->encryption_key_size; 6707 } 6708 #endif 6709 } 6710 return 0; 6711 } 6712 6713 int gap_authenticated(hci_con_handle_t con_handle){ 6714 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6715 if (hci_connection == NULL) return 0; 6716 6717 switch (hci_connection->address_type){ 6718 #ifdef ENABLE_BLE 6719 case BD_ADDR_TYPE_LE_PUBLIC: 6720 case BD_ADDR_TYPE_LE_RANDOM: 6721 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6722 return hci_connection->sm_connection.sm_connection_authenticated; 6723 #endif 6724 #ifdef ENABLE_CLASSIC 6725 case BD_ADDR_TYPE_SCO: 6726 case BD_ADDR_TYPE_ACL: 6727 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6728 #endif 6729 default: 6730 return 0; 6731 } 6732 } 6733 6734 int gap_secure_connection(hci_con_handle_t con_handle){ 6735 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6736 if (hci_connection == NULL) return 0; 6737 6738 switch (hci_connection->address_type){ 6739 #ifdef ENABLE_BLE 6740 case BD_ADDR_TYPE_LE_PUBLIC: 6741 case BD_ADDR_TYPE_LE_RANDOM: 6742 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6743 return hci_connection->sm_connection.sm_connection_sc; 6744 #endif 6745 #ifdef ENABLE_CLASSIC 6746 case BD_ADDR_TYPE_SCO: 6747 case BD_ADDR_TYPE_ACL: 6748 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6749 #endif 6750 default: 6751 return 0; 6752 } 6753 } 6754 6755 bool gap_bonded(hci_con_handle_t con_handle){ 6756 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6757 if (hci_connection == NULL) return 0; 6758 6759 #ifdef ENABLE_CLASSIC 6760 link_key_t link_key; 6761 link_key_type_t link_key_type; 6762 #endif 6763 switch (hci_connection->address_type){ 6764 #ifdef ENABLE_BLE 6765 case BD_ADDR_TYPE_LE_PUBLIC: 6766 case BD_ADDR_TYPE_LE_RANDOM: 6767 return hci_connection->sm_connection.sm_le_db_index >= 0; 6768 #endif 6769 #ifdef ENABLE_CLASSIC 6770 case BD_ADDR_TYPE_SCO: 6771 case BD_ADDR_TYPE_ACL: 6772 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6773 #endif 6774 default: 6775 return false; 6776 } 6777 } 6778 6779 #ifdef ENABLE_BLE 6780 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6781 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6782 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6783 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6784 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6785 return sm_conn->sm_connection_authorization_state; 6786 } 6787 #endif 6788 6789 #ifdef ENABLE_CLASSIC 6790 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){ 6791 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6792 if (!conn) return GAP_CONNECTION_INVALID; 6793 conn->sniff_min_interval = sniff_min_interval; 6794 conn->sniff_max_interval = sniff_max_interval; 6795 conn->sniff_attempt = sniff_attempt; 6796 conn->sniff_timeout = sniff_timeout; 6797 hci_run(); 6798 return 0; 6799 } 6800 6801 /** 6802 * @brief Exit Sniff mode 6803 * @param con_handle 6804 @ @return 0 if ok 6805 */ 6806 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6807 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6808 if (!conn) return GAP_CONNECTION_INVALID; 6809 conn->sniff_min_interval = 0xffff; 6810 hci_run(); 6811 return 0; 6812 } 6813 6814 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){ 6815 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6816 if (!conn) return GAP_CONNECTION_INVALID; 6817 conn->sniff_subrating_max_latency = max_latency; 6818 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6819 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6820 hci_run(); 6821 return ERROR_CODE_SUCCESS; 6822 } 6823 6824 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){ 6825 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6826 if (!conn) return GAP_CONNECTION_INVALID; 6827 conn->qos_service_type = service_type; 6828 conn->qos_token_rate = token_rate; 6829 conn->qos_peak_bandwidth = peak_bandwidth; 6830 conn->qos_latency = latency; 6831 conn->qos_delay_variation = delay_variation; 6832 hci_run(); 6833 return ERROR_CODE_SUCCESS; 6834 } 6835 6836 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6837 hci_stack->new_page_scan_interval = page_scan_interval; 6838 hci_stack->new_page_scan_window = page_scan_window; 6839 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6840 hci_run(); 6841 } 6842 6843 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6844 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6845 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6846 hci_run(); 6847 } 6848 6849 #endif 6850 6851 void hci_halting_defer(void){ 6852 if (hci_stack->state != HCI_STATE_HALTING) return; 6853 switch (hci_stack->substate){ 6854 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6855 case HCI_HALTING_CLOSE: 6856 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6857 break; 6858 default: 6859 break; 6860 } 6861 } 6862 6863 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6864 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6865 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6866 if (le_device_db_index >= le_device_db_max_count()) return; 6867 uint8_t offset = le_device_db_index >> 3; 6868 uint8_t mask = 1 << (le_device_db_index & 7); 6869 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6870 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6871 // note: go back to remove entries, otherwise, a remove + add will skip the add 6872 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6873 } 6874 } 6875 6876 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6877 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6878 if (le_device_db_index >= le_device_db_max_count()) return; 6879 uint8_t offset = le_device_db_index >> 3; 6880 uint8_t mask = 1 << (le_device_db_index & 7); 6881 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6882 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6883 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6884 } 6885 } 6886 6887 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6888 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6889 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6890 } 6891 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6892 // restart le resolving list update 6893 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6894 } 6895 return ERROR_CODE_SUCCESS; 6896 } 6897 #endif 6898 6899 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6900 void hci_setup_test_connections_fuzz(void){ 6901 hci_connection_t * conn; 6902 6903 // default address: 66:55:44:33:00:01 6904 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6905 6906 // setup Controller info 6907 hci_stack->num_cmd_packets = 255; 6908 hci_stack->acl_packets_total_num = 255; 6909 6910 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6911 addr[5] = 0x01; 6912 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6913 conn->con_handle = addr[5]; 6914 conn->role = HCI_ROLE_SLAVE; 6915 conn->state = RECEIVED_CONNECTION_REQUEST; 6916 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6917 6918 // setup incoming Classic SCO connection with con handle 0x0002 6919 addr[5] = 0x02; 6920 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6921 conn->con_handle = addr[5]; 6922 conn->role = HCI_ROLE_SLAVE; 6923 conn->state = RECEIVED_CONNECTION_REQUEST; 6924 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6925 6926 // setup ready Classic ACL connection with con handle 0x0003 6927 addr[5] = 0x03; 6928 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6929 conn->con_handle = addr[5]; 6930 conn->role = HCI_ROLE_SLAVE; 6931 conn->state = OPEN; 6932 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6933 6934 // setup ready Classic SCO connection with con handle 0x0004 6935 addr[5] = 0x04; 6936 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6937 conn->con_handle = addr[5]; 6938 conn->role = HCI_ROLE_SLAVE; 6939 conn->state = OPEN; 6940 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6941 6942 // setup ready LE ACL connection with con handle 0x005 and public address 6943 addr[5] = 0x05; 6944 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6945 conn->con_handle = addr[5]; 6946 conn->role = HCI_ROLE_SLAVE; 6947 conn->state = OPEN; 6948 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6949 conn->sm_connection.sm_connection_encrypted = 1; 6950 } 6951 6952 void hci_free_connections_fuzz(void){ 6953 btstack_linked_list_iterator_t it; 6954 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6955 while (btstack_linked_list_iterator_has_next(&it)){ 6956 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6957 btstack_linked_list_iterator_remove(&it); 6958 btstack_memory_hci_connection_free(con); 6959 } 6960 } 6961 void hci_simulate_working_fuzz(void){ 6962 hci_init_done(); 6963 hci_stack->num_cmd_packets = 255; 6964 } 6965 #endif 6966