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[11]; 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 // write page timeout 1351 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1352 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1353 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1354 return; 1355 } 1356 // send scan enable 1357 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1358 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1359 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1360 return; 1361 } 1362 // send write scan activity 1363 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1364 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1365 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1366 return; 1367 } 1368 } 1369 #endif 1370 1371 #ifndef HAVE_HOST_CONTROLLER_API 1372 1373 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1374 if (!hci_stack->config) return 0; 1375 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1376 // Limit baud rate for Broadcom chipsets to 3 mbps 1377 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1378 baud_rate = 3000000; 1379 } 1380 return baud_rate; 1381 } 1382 1383 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1384 UNUSED(ds); 1385 1386 switch (hci_stack->substate){ 1387 case HCI_INIT_W4_SEND_RESET: 1388 log_info("Resend HCI Reset"); 1389 hci_stack->substate = HCI_INIT_SEND_RESET; 1390 hci_stack->num_cmd_packets = 1; 1391 hci_run(); 1392 break; 1393 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1394 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1395 if (hci_stack->hci_transport->reset_link){ 1396 hci_stack->hci_transport->reset_link(); 1397 } 1398 1399 /* fall through */ 1400 1401 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1402 log_info("Resend HCI Reset - CSR Warm Boot"); 1403 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1404 hci_stack->num_cmd_packets = 1; 1405 hci_run(); 1406 break; 1407 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1408 if (hci_stack->hci_transport->set_baudrate){ 1409 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1410 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1411 hci_stack->hci_transport->set_baudrate(baud_rate); 1412 } 1413 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1414 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1415 if (hci_stack->hci_transport->reset_link){ 1416 log_info("Link Reset"); 1417 hci_stack->hci_transport->reset_link(); 1418 } 1419 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1420 hci_run(); 1421 } 1422 break; 1423 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1424 // otherwise continue 1425 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1426 hci_send_cmd(&hci_read_local_supported_commands); 1427 break; 1428 default: 1429 break; 1430 } 1431 } 1432 #endif 1433 1434 static void hci_initializing_next_state(void){ 1435 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1436 } 1437 1438 static void hci_init_done(void){ 1439 // done. tell the app 1440 log_info("hci_init_done -> HCI_STATE_WORKING"); 1441 hci_stack->state = HCI_STATE_WORKING; 1442 hci_emit_state(); 1443 } 1444 1445 // assumption: hci_can_send_command_packet_now() == true 1446 static void hci_initializing_run(void){ 1447 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1448 1449 #ifndef HAVE_HOST_CONTROLLER_API 1450 bool need_baud_change = hci_stack->config 1451 && hci_stack->chipset 1452 && hci_stack->chipset->set_baudrate_command 1453 && hci_stack->hci_transport->set_baudrate 1454 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1455 #endif 1456 1457 switch (hci_stack->substate){ 1458 case HCI_INIT_SEND_RESET: 1459 hci_state_reset(); 1460 1461 #ifndef HAVE_HOST_CONTROLLER_API 1462 // prepare reset if command complete not received in 100ms 1463 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1464 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1465 btstack_run_loop_add_timer(&hci_stack->timeout); 1466 #endif 1467 // send command 1468 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1469 hci_send_cmd(&hci_reset); 1470 break; 1471 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1472 hci_send_cmd(&hci_read_local_version_information); 1473 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1474 break; 1475 1476 #ifndef HAVE_HOST_CONTROLLER_API 1477 case HCI_INIT_SEND_READ_LOCAL_NAME: 1478 hci_send_cmd(&hci_read_local_name); 1479 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1480 break; 1481 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1482 hci_state_reset(); 1483 // prepare reset if command complete not received in 100ms 1484 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1485 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1486 btstack_run_loop_add_timer(&hci_stack->timeout); 1487 // send command 1488 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1489 hci_send_cmd(&hci_reset); 1490 break; 1491 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1492 hci_state_reset(); 1493 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1494 hci_send_cmd(&hci_reset); 1495 break; 1496 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1497 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1498 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1499 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1500 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1501 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1502 break; 1503 } 1504 case HCI_INIT_SET_BD_ADDR: 1505 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1506 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1507 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1508 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1509 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1510 break; 1511 case HCI_INIT_SEND_BAUD_CHANGE: 1512 if (need_baud_change) { 1513 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1514 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1515 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1516 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1517 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1518 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1519 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1520 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1521 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1522 btstack_run_loop_add_timer(&hci_stack->timeout); 1523 } 1524 break; 1525 } 1526 1527 /* fall through */ 1528 1529 case HCI_INIT_CUSTOM_INIT: 1530 // Custom initialization 1531 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1532 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1533 bool send_cmd = false; 1534 switch (hci_stack->chipset_result){ 1535 case BTSTACK_CHIPSET_VALID_COMMAND: 1536 send_cmd = true; 1537 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1538 break; 1539 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1540 send_cmd = true; 1541 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1542 log_info("CSR Warm Boot"); 1543 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1544 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1545 btstack_run_loop_add_timer(&hci_stack->timeout); 1546 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1547 && hci_stack->config 1548 && hci_stack->chipset 1549 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1550 && hci_stack->hci_transport->set_baudrate 1551 && hci_transport_uart_get_main_baud_rate()){ 1552 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1553 } else { 1554 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1555 } 1556 break; 1557 default: 1558 break; 1559 } 1560 1561 if (send_cmd){ 1562 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1563 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1564 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1565 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1566 break; 1567 } 1568 log_info("Init script done"); 1569 1570 // Init script download on Broadcom chipsets causes: 1571 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1572 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1573 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1574 1575 // - baud rate to reset, restore UART baud rate if needed 1576 if (need_baud_change) { 1577 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1578 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1579 hci_stack->hci_transport->set_baudrate(baud_rate); 1580 } 1581 1582 uint16_t bcm_delay_ms = 300; 1583 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1584 // -> Work around: wait here. 1585 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1586 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1587 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1588 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1589 btstack_run_loop_add_timer(&hci_stack->timeout); 1590 break; 1591 } 1592 } 1593 #endif 1594 /* fall through */ 1595 1596 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1597 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1598 hci_send_cmd(&hci_read_local_supported_commands); 1599 break; 1600 case HCI_INIT_READ_BD_ADDR: 1601 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1602 hci_send_cmd(&hci_read_bd_addr); 1603 break; 1604 case HCI_INIT_READ_BUFFER_SIZE: 1605 // only read buffer size if supported 1606 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1607 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1608 hci_send_cmd(&hci_read_buffer_size); 1609 break; 1610 } 1611 1612 /* fall through */ 1613 1614 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1615 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1616 hci_send_cmd(&hci_read_local_supported_features); 1617 break; 1618 1619 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1620 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1621 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1622 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1623 break; 1624 case HCI_INIT_HOST_BUFFER_SIZE: 1625 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1626 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1627 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1628 break; 1629 #endif 1630 1631 case HCI_INIT_SET_EVENT_MASK: 1632 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1633 if (hci_le_supported()){ 1634 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1635 } else { 1636 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1637 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1638 } 1639 break; 1640 1641 #ifdef ENABLE_CLASSIC 1642 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1643 if (hci_classic_supported() && gap_ssp_supported()){ 1644 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1645 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1646 break; 1647 } 1648 1649 /* fall through */ 1650 1651 case HCI_INIT_WRITE_INQUIRY_MODE: 1652 if (hci_classic_supported()){ 1653 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1654 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1655 break; 1656 } 1657 1658 /* fall through */ 1659 1660 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1661 // skip write secure connections host support if not supported or disabled 1662 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1663 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1664 hci_stack->secure_connections_active = true; 1665 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1666 break; 1667 } 1668 1669 #ifdef ENABLE_SCO_OVER_HCI 1670 /* fall through */ 1671 1672 // only sent if ENABLE_SCO_OVER_HCI is defined 1673 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1674 // skip write synchronous flow control if not supported 1675 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1676 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1677 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1678 break; 1679 } 1680 /* fall through */ 1681 1682 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1683 // skip write default erroneous data reporting if not supported 1684 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1685 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1686 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1687 break; 1688 } 1689 #endif 1690 1691 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1692 /* fall through */ 1693 1694 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1695 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1696 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1697 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1698 #ifdef ENABLE_SCO_OVER_HCI 1699 log_info("BCM: Route SCO data via HCI transport"); 1700 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1701 #endif 1702 #ifdef ENABLE_SCO_OVER_PCM 1703 log_info("BCM: Route SCO data via PCM interface"); 1704 #ifdef ENABLE_BCM_PCM_WBS 1705 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1706 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1707 #else 1708 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1709 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1710 #endif 1711 #endif 1712 break; 1713 } 1714 #endif 1715 1716 #ifdef ENABLE_SCO_OVER_PCM 1717 /* fall through */ 1718 1719 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1720 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1721 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1722 log_info("BCM: Config PCM interface for I2S"); 1723 #ifdef ENABLE_BCM_PCM_WBS 1724 // 512 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, 2); 1726 #else 1727 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1728 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1729 #endif 1730 break; 1731 } 1732 #endif 1733 #endif 1734 1735 #ifdef ENABLE_BLE 1736 /* fall through */ 1737 1738 // LE INIT 1739 case HCI_INIT_LE_READ_BUFFER_SIZE: 1740 if (hci_le_supported()){ 1741 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1742 hci_send_cmd(&hci_le_read_buffer_size); 1743 break; 1744 } 1745 1746 /* fall through */ 1747 1748 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1749 // skip write le host if not supported (e.g. on LE only EM9301) 1750 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1751 // LE Supported Host = 1, Simultaneous Host = 0 1752 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1753 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1754 break; 1755 } 1756 1757 /* fall through */ 1758 1759 case HCI_INIT_LE_SET_EVENT_MASK: 1760 if (hci_le_supported()){ 1761 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1762 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1763 break; 1764 } 1765 #endif 1766 1767 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1768 /* fall through */ 1769 1770 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1771 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1772 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1773 hci_send_cmd(&hci_le_read_maximum_data_length); 1774 break; 1775 } 1776 1777 /* fall through */ 1778 1779 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1780 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1781 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1782 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1783 break; 1784 } 1785 #endif 1786 1787 #ifdef ENABLE_LE_CENTRAL 1788 /* fall through */ 1789 1790 case HCI_INIT_READ_WHITE_LIST_SIZE: 1791 if (hci_le_supported()){ 1792 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1793 hci_send_cmd(&hci_le_read_white_list_size); 1794 break; 1795 } 1796 1797 /* fall through */ 1798 1799 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1800 if (hci_le_supported()){ 1801 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1802 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); 1803 break; 1804 } 1805 #endif 1806 1807 /* fall through */ 1808 1809 case HCI_INIT_DONE: 1810 hci_stack->substate = HCI_INIT_DONE; 1811 #ifdef ENABLE_CLASSIC 1812 // init sequence complete, check if GAP Tasks are completed 1813 if (hci_stack->gap_tasks != 0) { 1814 hci_run_gap_tasks_classic(); 1815 break; 1816 } 1817 #endif 1818 hci_init_done(); 1819 break; 1820 1821 default: 1822 return; 1823 } 1824 } 1825 1826 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1827 bool command_completed = false; 1828 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1829 uint16_t opcode = little_endian_read_16(packet,3); 1830 if (opcode == hci_stack->last_cmd_opcode){ 1831 command_completed = true; 1832 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1833 } else { 1834 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1835 } 1836 } 1837 1838 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1839 uint8_t status = packet[2]; 1840 uint16_t opcode = little_endian_read_16(packet,4); 1841 if (opcode == hci_stack->last_cmd_opcode){ 1842 if (status){ 1843 command_completed = true; 1844 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1845 } else { 1846 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1847 } 1848 } else { 1849 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1850 } 1851 } 1852 #ifndef HAVE_HOST_CONTROLLER_API 1853 // Vendor == CSR 1854 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1855 // TODO: track actual command 1856 command_completed = true; 1857 } 1858 1859 // Vendor == Toshiba 1860 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1861 // TODO: track actual command 1862 command_completed = true; 1863 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1864 hci_stack->num_cmd_packets = 1; 1865 } 1866 #endif 1867 1868 return command_completed; 1869 } 1870 1871 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1872 1873 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1874 1875 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1876 1877 #ifndef HAVE_HOST_CONTROLLER_API 1878 1879 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1880 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1881 // 1882 // HCI Reset 1883 // Timeout 100 ms 1884 // HCI Reset 1885 // Command Complete Reset 1886 // HCI Read Local Version Information 1887 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1888 // hang... 1889 // 1890 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1891 if (!command_completed 1892 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1893 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1894 1895 uint16_t opcode = little_endian_read_16(packet,3); 1896 if (opcode == hci_reset.opcode){ 1897 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1898 return; 1899 } 1900 } 1901 1902 // CSR & H5 1903 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1904 if (!command_completed 1905 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1906 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1907 1908 uint16_t opcode = little_endian_read_16(packet,3); 1909 if (opcode == hci_reset.opcode){ 1910 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1911 return; 1912 } 1913 } 1914 1915 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1916 // fix: Correct substate and behave as command below 1917 if (command_completed){ 1918 switch (hci_stack->substate){ 1919 case HCI_INIT_SEND_RESET: 1920 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1921 break; 1922 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1923 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1924 break; 1925 default: 1926 break; 1927 } 1928 } 1929 1930 #endif 1931 1932 if (!command_completed) return; 1933 1934 bool need_baud_change = false; 1935 bool need_addr_change = false; 1936 1937 #ifndef HAVE_HOST_CONTROLLER_API 1938 need_baud_change = hci_stack->config 1939 && hci_stack->chipset 1940 && hci_stack->chipset->set_baudrate_command 1941 && hci_stack->hci_transport->set_baudrate 1942 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1943 1944 need_addr_change = hci_stack->custom_bd_addr_set 1945 && hci_stack->chipset 1946 && hci_stack->chipset->set_bd_addr_command; 1947 #endif 1948 1949 switch(hci_stack->substate){ 1950 1951 #ifndef HAVE_HOST_CONTROLLER_API 1952 case HCI_INIT_SEND_RESET: 1953 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1954 // fix: just correct substate and behave as command below 1955 1956 /* fall through */ 1957 #endif 1958 1959 case HCI_INIT_W4_SEND_RESET: 1960 btstack_run_loop_remove_timer(&hci_stack->timeout); 1961 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1962 return; 1963 1964 #ifndef HAVE_HOST_CONTROLLER_API 1965 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1966 // for STLC2500D, baud rate change already happened. 1967 // for others, baud rate gets changed now 1968 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1969 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1970 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1971 hci_stack->hci_transport->set_baudrate(baud_rate); 1972 } 1973 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1974 return; 1975 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1976 btstack_run_loop_remove_timer(&hci_stack->timeout); 1977 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1978 return; 1979 case HCI_INIT_W4_CUSTOM_INIT: 1980 // repeat custom init 1981 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1982 return; 1983 #endif 1984 1985 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1986 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1987 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1988 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1989 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1990 return; 1991 } 1992 if (need_addr_change){ 1993 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1994 return; 1995 } 1996 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1997 return; 1998 #ifndef HAVE_HOST_CONTROLLER_API 1999 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2000 if (need_baud_change){ 2001 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2002 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2003 hci_stack->hci_transport->set_baudrate(baud_rate); 2004 } 2005 if (need_addr_change){ 2006 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2007 return; 2008 } 2009 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2010 return; 2011 case HCI_INIT_W4_SET_BD_ADDR: 2012 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2013 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2014 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2015 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2016 return; 2017 } 2018 // skipping st warm boot 2019 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2020 return; 2021 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2022 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2023 return; 2024 #endif 2025 2026 case HCI_INIT_DONE: 2027 // set state if we came here by fall through 2028 hci_stack->substate = HCI_INIT_DONE; 2029 return; 2030 2031 default: 2032 break; 2033 } 2034 hci_initializing_next_state(); 2035 } 2036 2037 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2038 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2039 bd_addr_t bd_address; 2040 (void)memcpy(&bd_address, conn->address, 6); 2041 2042 #ifdef ENABLE_CLASSIC 2043 // cache needed data 2044 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2045 #endif 2046 2047 // connection failed, remove entry 2048 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2049 btstack_memory_hci_connection_free( conn ); 2050 2051 #ifdef ENABLE_CLASSIC 2052 // notify client if dedicated bonding 2053 if (notify_dedicated_bonding_failed){ 2054 log_info("hci notify_dedicated_bonding_failed"); 2055 hci_emit_dedicated_bonding_result(bd_address, status); 2056 } 2057 2058 // if authentication error, also delete link key 2059 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2060 gap_drop_link_key_for_bd_addr(bd_address); 2061 } 2062 #else 2063 UNUSED(status); 2064 #endif 2065 } 2066 2067 #ifdef ENABLE_CLASSIC 2068 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2069 // SSP Controller 2070 if (features[6] & (1 << 3)){ 2071 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2072 } 2073 // eSCO 2074 if (features[3] & (1<<7)){ 2075 conn->remote_supported_features[0] |= 1; 2076 } 2077 // Extended features 2078 if (features[7] & (1<<7)){ 2079 conn->remote_supported_features[0] |= 2; 2080 } 2081 } 2082 2083 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2084 // SSP Host 2085 if (features[0] & (1 << 0)){ 2086 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2087 } 2088 // SC Host 2089 if (features[0] & (1 << 3)){ 2090 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2091 } 2092 } 2093 2094 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2095 // SC Controller 2096 if (features[1] & (1 << 0)){ 2097 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2098 } 2099 } 2100 2101 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2102 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2103 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2104 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2105 if (conn->bonding_flags & BONDING_DEDICATED){ 2106 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2107 } 2108 } 2109 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2110 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2111 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2112 } 2113 2114 #endif 2115 2116 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2117 // handle BT initialization 2118 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2119 hci_initializing_event_handler(packet, size); 2120 } 2121 2122 // help with BT sleep 2123 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2124 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2125 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2126 hci_initializing_next_state(); 2127 } 2128 } 2129 2130 #ifdef ENABLE_CLASSIC 2131 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2132 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2133 conn->encryption_key_size = encryption_key_size; 2134 2135 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2136 conn->requested_security_level = LEVEL_0; 2137 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2138 return; 2139 } 2140 2141 // Request remote features if not already done 2142 if ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) == 0) { 2143 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2144 } 2145 2146 // Request Authentication if not already done 2147 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2148 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2149 } 2150 #endif 2151 2152 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2153 UNUSED(size); 2154 2155 uint16_t manufacturer; 2156 #ifdef ENABLE_CLASSIC 2157 hci_con_handle_t handle; 2158 hci_connection_t * conn; 2159 uint8_t status; 2160 #endif 2161 // get num cmd packets - limit to 1 to reduce complexity 2162 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2163 2164 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2165 switch (opcode){ 2166 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2167 if (packet[5]) break; 2168 // terminate, name 248 chars 2169 packet[6+248] = 0; 2170 log_info("local name: %s", &packet[6]); 2171 break; 2172 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2173 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2174 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2175 uint16_t acl_len = little_endian_read_16(packet, 6); 2176 uint16_t sco_len = packet[8]; 2177 2178 // determine usable ACL/SCO payload size 2179 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2180 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2181 2182 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2183 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2184 2185 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2186 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2187 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2188 } 2189 break; 2190 case HCI_OPCODE_HCI_READ_RSSI: 2191 if (packet[5] == ERROR_CODE_SUCCESS){ 2192 uint8_t event[5]; 2193 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2194 event[1] = 3; 2195 (void)memcpy(&event[2], &packet[6], 3); 2196 hci_emit_event(event, sizeof(event), 1); 2197 } 2198 break; 2199 #ifdef ENABLE_BLE 2200 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2201 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2202 hci_stack->le_acl_packets_total_num = packet[8]; 2203 // determine usable ACL payload size 2204 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2205 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2206 } 2207 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2208 break; 2209 #endif 2210 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2211 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2212 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2213 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2214 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); 2215 break; 2216 #endif 2217 #ifdef ENABLE_LE_CENTRAL 2218 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2219 hci_stack->le_whitelist_capacity = packet[6]; 2220 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2221 break; 2222 #endif 2223 case HCI_OPCODE_HCI_READ_BD_ADDR: 2224 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2225 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)); 2226 #ifdef ENABLE_CLASSIC 2227 if (hci_stack->link_key_db){ 2228 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2229 } 2230 #endif 2231 break; 2232 #ifdef ENABLE_CLASSIC 2233 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2234 hci_emit_discoverable_enabled(hci_stack->discoverable); 2235 break; 2236 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2237 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2238 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2239 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2240 hci_emit_event(event, sizeof(event), 1); 2241 } 2242 break; 2243 #endif 2244 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2245 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2246 2247 #ifdef ENABLE_CLASSIC 2248 // determine usable ACL packet types based on host buffer size and supported features 2249 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2250 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2251 #endif 2252 // Classic/LE 2253 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2254 break; 2255 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2256 manufacturer = little_endian_read_16(packet, 10); 2257 // map Cypress to Broadcom 2258 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2259 log_info("Treat Cypress as Broadcom"); 2260 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2261 little_endian_store_16(packet, 10, manufacturer); 2262 } 2263 hci_stack->manufacturer = manufacturer; 2264 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2265 break; 2266 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2267 hci_stack->local_supported_commands[0] = 2268 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2269 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2270 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2271 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2276 hci_stack->local_supported_commands[1] = 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2278 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2282 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2283 break; 2284 #ifdef ENABLE_CLASSIC 2285 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2286 if (packet[5]) return; 2287 hci_stack->synchronous_flow_control_enabled = 1; 2288 break; 2289 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2290 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2291 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2292 conn = hci_connection_for_handle(handle); 2293 if (conn != NULL) { 2294 uint8_t key_size = 0; 2295 if (status == 0){ 2296 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2297 log_info("Handle %04x key Size: %u", handle, key_size); 2298 } else { 2299 key_size = 1; 2300 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2301 } 2302 hci_handle_read_encryption_key_size_complete(conn, key_size); 2303 } 2304 break; 2305 // assert pairing complete event is emitted. 2306 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2307 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2308 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2309 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2310 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2311 // lookup connection by gap pairing addr 2312 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2313 if (conn == NULL) break; 2314 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2315 break; 2316 2317 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2318 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2319 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2320 uint8_t event[67]; 2321 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2322 event[1] = 65; 2323 (void)memset(&event[2], 0, 65); 2324 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2325 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2326 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2327 event[2] = 3; 2328 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2329 } else { 2330 event[2] = 1; 2331 } 2332 } 2333 hci_emit_event(event, sizeof(event), 0); 2334 break; 2335 } 2336 2337 // note: only needed if user does not provide OOB data 2338 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2339 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2340 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2341 if (conn == NULL) break; 2342 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2343 break; 2344 #endif 2345 #endif 2346 default: 2347 break; 2348 } 2349 } 2350 2351 #ifdef ENABLE_BLE 2352 static void event_handle_le_connection_complete(const uint8_t * packet){ 2353 bd_addr_t addr; 2354 bd_addr_type_t addr_type; 2355 hci_connection_t * conn; 2356 2357 // Connection management 2358 reverse_bd_addr(&packet[8], addr); 2359 addr_type = (bd_addr_type_t)packet[7]; 2360 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2361 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2362 2363 #ifdef ENABLE_LE_CENTRAL 2364 // handle error: error is reported only to the initiator -> outgoing connection 2365 if (packet[3]){ 2366 2367 // handle cancelled outgoing connection 2368 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2369 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2370 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2371 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2372 // reset state 2373 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2374 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2375 // get outgoing connection conn struct for direct connect 2376 conn = gap_get_outgoing_connection(); 2377 } 2378 2379 // outgoing le connection establishment is done 2380 if (conn){ 2381 // remove entry 2382 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2383 btstack_memory_hci_connection_free( conn ); 2384 } 2385 return; 2386 } 2387 #endif 2388 2389 // on success, both hosts receive connection complete event 2390 if (packet[6] == HCI_ROLE_MASTER){ 2391 #ifdef ENABLE_LE_CENTRAL 2392 // if we're master on an le connection, it was an outgoing connection and we're done with it 2393 // note: no hci_connection_t object exists yet for connect with whitelist 2394 if (hci_is_le_connection_type(addr_type)){ 2395 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2396 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2397 } 2398 #endif 2399 } else { 2400 #ifdef ENABLE_LE_PERIPHERAL 2401 // if we're slave, it was an incoming connection, advertisements have stopped 2402 hci_stack->le_advertisements_active = false; 2403 #endif 2404 } 2405 2406 // LE connections are auto-accepted, so just create a connection if there isn't one already 2407 if (!conn){ 2408 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2409 } 2410 2411 // no memory, sorry. 2412 if (!conn){ 2413 return; 2414 } 2415 2416 conn->state = OPEN; 2417 conn->role = packet[6]; 2418 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2419 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2420 2421 #ifdef ENABLE_LE_PERIPHERAL 2422 if (packet[6] == HCI_ROLE_SLAVE){ 2423 hci_update_advertisements_enabled_for_current_roles(); 2424 } 2425 #endif 2426 2427 // init unenhanced att bearer mtu 2428 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2429 conn->att_connection.mtu_exchanged = false; 2430 2431 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2432 2433 // restart timer 2434 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2435 // btstack_run_loop_add_timer(&conn->timeout); 2436 2437 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2438 2439 hci_emit_nr_connections_changed(); 2440 } 2441 #endif 2442 2443 #ifdef ENABLE_CLASSIC 2444 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){ 2445 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2446 // LEVEL_4 is tested by l2cap 2447 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2448 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2449 if (level >= LEVEL_3){ 2450 // MITM not possible without keyboard or display 2451 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2452 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2453 2454 // MITM possible if one side has keyboard and the other has keyboard or display 2455 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2456 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2457 2458 // MITM not possible if one side has only display and other side has no keyboard 2459 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2460 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2461 } 2462 // LEVEL 2 requires SSP, which is a given 2463 return true; 2464 } 2465 2466 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2467 uint16_t i; 2468 for (i=0; i < size ; i++){ 2469 if (data[i] != 0) { 2470 return false; 2471 } 2472 } 2473 return true; 2474 } 2475 2476 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2477 // get requested security level 2478 gap_security_level_t requested_security_level = conn->requested_security_level; 2479 if (hci_stack->gap_secure_connections_only_mode){ 2480 requested_security_level = LEVEL_4; 2481 } 2482 2483 // assess security: LEVEL 4 requires SC 2484 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2485 if ((requested_security_level == LEVEL_4) && 2486 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2487 !hci_remote_sc_enabled(conn)){ 2488 log_info("Level 4 required, but SC not supported -> abort"); 2489 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2490 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2491 return; 2492 } 2493 2494 // assess security based on io capabilities 2495 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2496 // responder: fully validate io caps of both sides as well as OOB data 2497 bool security_possible = false; 2498 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2499 2500 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2501 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2502 // so we merge the OOB data availability 2503 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2504 if (conn->classic_oob_c_192 != NULL){ 2505 have_oob_data |= 1; 2506 } 2507 if (conn->classic_oob_c_256 != NULL){ 2508 have_oob_data |= 2; 2509 } 2510 // for up to Level 3, either P-192 as well as P-256 will do 2511 // 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 2512 // if remote does not SC, we should not receive P-256 data either 2513 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2514 security_possible = true; 2515 } 2516 // for Level 4, P-256 is needed 2517 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2518 security_possible = true; 2519 } 2520 #endif 2521 2522 if (security_possible == false){ 2523 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2524 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2525 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2526 return; 2527 } 2528 } else { 2529 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2530 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2531 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2532 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2533 log_info("Level 3+ required, but no input/output -> abort"); 2534 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2535 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2536 return; 2537 } 2538 #endif 2539 #endif 2540 } 2541 2542 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2543 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2544 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2545 } else { 2546 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2547 } 2548 #endif 2549 } 2550 2551 #endif 2552 2553 static void event_handler(uint8_t *packet, uint16_t size){ 2554 2555 uint16_t event_length = packet[1]; 2556 2557 // assert packet is complete 2558 if (size != (event_length + 2u)){ 2559 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2560 return; 2561 } 2562 2563 bd_addr_type_t addr_type; 2564 hci_con_handle_t handle; 2565 hci_connection_t * conn; 2566 int i; 2567 int create_connection_cmd; 2568 2569 #ifdef ENABLE_CLASSIC 2570 hci_link_type_t link_type; 2571 bd_addr_t addr; 2572 #endif 2573 2574 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2575 2576 switch (hci_event_packet_get_type(packet)) { 2577 2578 case HCI_EVENT_COMMAND_COMPLETE: 2579 handle_command_complete_event(packet, size); 2580 break; 2581 2582 case HCI_EVENT_COMMAND_STATUS: 2583 // get num cmd packets - limit to 1 to reduce complexity 2584 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2585 2586 // check command status to detected failed outgoing connections 2587 create_connection_cmd = 0; 2588 #ifdef ENABLE_CLASSIC 2589 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2590 create_connection_cmd = 1; 2591 } 2592 #endif 2593 #ifdef ENABLE_LE_CENTRAL 2594 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2595 create_connection_cmd = 1; 2596 } 2597 #endif 2598 if (create_connection_cmd) { 2599 uint8_t status = hci_event_command_status_get_status(packet); 2600 addr_type = hci_stack->outgoing_addr_type; 2601 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2602 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); 2603 2604 // reset outgoing address info 2605 memset(hci_stack->outgoing_addr, 0, 6); 2606 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2607 2608 // on error 2609 if (status != ERROR_CODE_SUCCESS){ 2610 #ifdef ENABLE_LE_CENTRAL 2611 if (hci_is_le_connection_type(addr_type)){ 2612 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2613 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2614 } 2615 #endif 2616 // error => outgoing connection failed 2617 if (conn != NULL){ 2618 hci_handle_connection_failed(conn, status); 2619 } 2620 } 2621 } 2622 2623 #ifdef ENABLE_CLASSIC 2624 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2625 uint8_t status = hci_event_command_status_get_status(packet); 2626 log_info("command status (inquiry), status %x", status); 2627 if (status == ERROR_CODE_SUCCESS) { 2628 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2629 } else { 2630 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2631 } 2632 } 2633 #endif 2634 break; 2635 2636 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2637 if (size < 3) return; 2638 uint16_t num_handles = packet[2]; 2639 if (size != (3u + num_handles * 4u)) return; 2640 uint16_t offset = 3; 2641 for (i=0; i<num_handles;i++){ 2642 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2643 offset += 2u; 2644 uint16_t num_packets = little_endian_read_16(packet, offset); 2645 offset += 2u; 2646 2647 conn = hci_connection_for_handle(handle); 2648 if (!conn){ 2649 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2650 continue; 2651 } 2652 2653 if (conn->num_packets_sent >= num_packets){ 2654 conn->num_packets_sent -= num_packets; 2655 } else { 2656 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2657 conn->num_packets_sent = 0; 2658 } 2659 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2660 2661 #ifdef ENABLE_CLASSIC 2662 // For SCO, we do the can_send_now_check here 2663 hci_notify_if_sco_can_send_now(); 2664 #endif 2665 } 2666 break; 2667 } 2668 2669 #ifdef ENABLE_CLASSIC 2670 case HCI_EVENT_INQUIRY_COMPLETE: 2671 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2672 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2673 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2674 hci_emit_event(event, sizeof(event), 1); 2675 } 2676 break; 2677 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2678 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2679 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2680 } 2681 break; 2682 case HCI_EVENT_CONNECTION_REQUEST: 2683 reverse_bd_addr(&packet[2], addr); 2684 link_type = (hci_link_type_t) packet[11]; 2685 2686 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2687 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2688 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2689 bd_addr_copy(hci_stack->decline_addr, addr); 2690 break; 2691 } 2692 2693 if (hci_stack->gap_classic_accept_callback != NULL){ 2694 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2695 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2696 bd_addr_copy(hci_stack->decline_addr, addr); 2697 break; 2698 } 2699 } 2700 2701 // TODO: eval COD 8-10 2702 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2703 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2704 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2705 if (!conn) { 2706 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2707 } 2708 if (!conn) { 2709 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2710 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2711 bd_addr_copy(hci_stack->decline_addr, addr); 2712 break; 2713 } 2714 conn->role = HCI_ROLE_SLAVE; 2715 conn->state = RECEIVED_CONNECTION_REQUEST; 2716 // store info about eSCO 2717 if (link_type == HCI_LINK_TYPE_ESCO){ 2718 conn->remote_supported_features[0] |= 1; 2719 } 2720 hci_run(); 2721 break; 2722 2723 case HCI_EVENT_CONNECTION_COMPLETE: 2724 // Connection management 2725 reverse_bd_addr(&packet[5], addr); 2726 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2727 addr_type = BD_ADDR_TYPE_ACL; 2728 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2729 if (conn) { 2730 if (!packet[2]){ 2731 conn->state = OPEN; 2732 conn->con_handle = little_endian_read_16(packet, 3); 2733 2734 // queue set supervision timeout if we're master 2735 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2736 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2737 } 2738 2739 // restart timer 2740 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2741 btstack_run_loop_add_timer(&conn->timeout); 2742 2743 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2744 2745 hci_emit_nr_connections_changed(); 2746 } else { 2747 // connection failed 2748 hci_handle_connection_failed(conn, packet[2]); 2749 } 2750 } 2751 break; 2752 2753 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2754 reverse_bd_addr(&packet[5], addr); 2755 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2756 if (packet[2]){ 2757 // connection failed 2758 break; 2759 } 2760 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2761 if (!conn) { 2762 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2763 } 2764 if (!conn) { 2765 break; 2766 } 2767 conn->state = OPEN; 2768 conn->con_handle = little_endian_read_16(packet, 3); 2769 2770 #ifdef ENABLE_SCO_OVER_HCI 2771 // update SCO 2772 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2773 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2774 } 2775 // trigger can send now 2776 if (hci_have_usb_transport()){ 2777 hci_stack->sco_can_send_now = true; 2778 } 2779 #endif 2780 #ifdef HAVE_SCO_TRANSPORT 2781 // configure sco transport 2782 if (hci_stack->sco_transport != NULL){ 2783 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2784 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2785 } 2786 #endif 2787 break; 2788 2789 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2790 handle = little_endian_read_16(packet, 3); 2791 conn = hci_connection_for_handle(handle); 2792 if (!conn) break; 2793 if (!packet[2]){ 2794 const uint8_t * features = &packet[5]; 2795 hci_handle_remote_features_page_0(conn, features); 2796 2797 // read extended features if possible 2798 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2799 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2800 break; 2801 } 2802 } 2803 hci_handle_remote_features_received(conn); 2804 break; 2805 2806 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2807 handle = little_endian_read_16(packet, 3); 2808 conn = hci_connection_for_handle(handle); 2809 if (!conn) break; 2810 // status = ok, page = 1 2811 if (!packet[2]) { 2812 uint8_t page_number = packet[5]; 2813 uint8_t maximum_page_number = packet[6]; 2814 const uint8_t * features = &packet[7]; 2815 bool done = false; 2816 switch (page_number){ 2817 case 1: 2818 hci_handle_remote_features_page_1(conn, features); 2819 if (maximum_page_number >= 2){ 2820 // get Secure Connections (Controller) from Page 2 if available 2821 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2822 } else { 2823 // otherwise, assume SC (Controller) == SC (Host) 2824 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2825 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2826 } 2827 done = true; 2828 } 2829 break; 2830 case 2: 2831 hci_handle_remote_features_page_2(conn, features); 2832 done = true; 2833 break; 2834 default: 2835 break; 2836 } 2837 if (!done) break; 2838 } 2839 hci_handle_remote_features_received(conn); 2840 break; 2841 2842 case HCI_EVENT_LINK_KEY_REQUEST: 2843 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2844 hci_event_link_key_request_get_bd_addr(packet, addr); 2845 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2846 if (!conn) break; 2847 2848 // lookup link key in db if not cached 2849 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2850 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2851 } 2852 2853 // response sent by hci_run() 2854 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2855 #endif 2856 break; 2857 2858 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2859 hci_event_link_key_request_get_bd_addr(packet, addr); 2860 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2861 if (!conn) break; 2862 2863 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2864 2865 // CVE-2020-26555: ignore NULL link key 2866 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2867 if (btstack_is_null(&packet[8], 16)) break; 2868 2869 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2870 // Change Connection Encryption keeps link key type 2871 if (link_key_type != CHANGED_COMBINATION_KEY){ 2872 conn->link_key_type = link_key_type; 2873 } 2874 2875 // cache link key. link keys stored in little-endian format for legacy reasons 2876 memcpy(&conn->link_key, &packet[8], 16); 2877 2878 // only store link key: 2879 // - if bondable enabled 2880 if (hci_stack->bondable == false) break; 2881 // - if security level sufficient 2882 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2883 // - for SSP, also check if remote side requested bonding as well 2884 if (conn->link_key_type != COMBINATION_KEY){ 2885 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2886 if (!remote_bonding){ 2887 break; 2888 } 2889 } 2890 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2891 break; 2892 } 2893 2894 case HCI_EVENT_PIN_CODE_REQUEST: 2895 hci_event_pin_code_request_get_bd_addr(packet, addr); 2896 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2897 if (!conn) break; 2898 2899 hci_pairing_started(conn, false); 2900 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2901 if (!hci_stack->bondable ){ 2902 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2903 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2904 hci_run(); 2905 return; 2906 } 2907 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2908 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2909 log_info("Level 4 required, but SC not supported -> abort"); 2910 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2911 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2912 hci_run(); 2913 return; 2914 } 2915 break; 2916 2917 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2918 hci_event_io_capability_response_get_bd_addr(packet, addr); 2919 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2920 if (!conn) break; 2921 2922 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2923 hci_pairing_started(conn, true); 2924 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2925 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2926 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2927 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2928 #endif 2929 break; 2930 2931 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2932 hci_event_io_capability_response_get_bd_addr(packet, addr); 2933 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2934 if (!conn) break; 2935 2936 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2937 hci_connection_timestamp(conn); 2938 hci_pairing_started(conn, true); 2939 break; 2940 2941 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2942 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2943 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2944 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2945 if (!conn) break; 2946 2947 hci_connection_timestamp(conn); 2948 2949 hci_pairing_started(conn, true); 2950 2951 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2952 break; 2953 #endif 2954 2955 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2956 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2957 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2958 if (!conn) break; 2959 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2960 if (hci_stack->ssp_auto_accept){ 2961 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2962 }; 2963 } else { 2964 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2965 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2966 // don't forward event to app 2967 hci_run(); 2968 return; 2969 } 2970 break; 2971 2972 case HCI_EVENT_USER_PASSKEY_REQUEST: 2973 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2974 if (hci_stack->ssp_auto_accept){ 2975 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2976 }; 2977 break; 2978 2979 case HCI_EVENT_MODE_CHANGE: 2980 handle = hci_event_mode_change_get_handle(packet); 2981 conn = hci_connection_for_handle(handle); 2982 if (!conn) break; 2983 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2984 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2985 break; 2986 #endif 2987 2988 case HCI_EVENT_ENCRYPTION_CHANGE: 2989 handle = hci_event_encryption_change_get_connection_handle(packet); 2990 conn = hci_connection_for_handle(handle); 2991 if (!conn) break; 2992 if (hci_event_encryption_change_get_status(packet) == 0u) { 2993 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2994 if (encryption_enabled){ 2995 if (hci_is_le_connection(conn)){ 2996 // For LE, we accept connection as encrypted 2997 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2998 } 2999 #ifdef ENABLE_CLASSIC 3000 else { 3001 3002 // dedicated bonding: send result and disconnect 3003 if (conn->bonding_flags & BONDING_DEDICATED){ 3004 conn->bonding_flags &= ~BONDING_DEDICATED; 3005 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3006 conn->bonding_status = packet[2]; 3007 break; 3008 } 3009 3010 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3011 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3012 bool connected_uses_aes_ccm = encryption_enabled == 2; 3013 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3014 log_info("SC during pairing, but only E0 now -> abort"); 3015 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3016 break; 3017 } 3018 3019 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3020 if (connected_uses_aes_ccm){ 3021 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3022 } 3023 3024 #ifdef ENABLE_TESTING_SUPPORT 3025 // work around for issue with PTS dongle 3026 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3027 #endif 3028 3029 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3030 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3031 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3032 } else { 3033 // if not, pretend everything is perfect 3034 hci_handle_read_encryption_key_size_complete(conn, 16); 3035 } 3036 } 3037 #endif 3038 } else { 3039 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3040 } 3041 } 3042 3043 break; 3044 3045 #ifdef ENABLE_CLASSIC 3046 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3047 handle = hci_event_authentication_complete_get_connection_handle(packet); 3048 conn = hci_connection_for_handle(handle); 3049 if (!conn) break; 3050 3051 // clear authentication active flag 3052 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3053 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3054 3055 // authenticated only if auth status == 0 3056 if (hci_event_authentication_complete_get_status(packet) == 0){ 3057 // authenticated 3058 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3059 3060 // If not already encrypted, start encryption 3061 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3062 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3063 break; 3064 } 3065 } 3066 3067 // emit updated security level 3068 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3069 break; 3070 3071 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3072 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3073 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3074 if (!conn) break; 3075 3076 // treat successfully paired connection as authenticated 3077 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3078 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3079 } 3080 3081 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3082 break; 3083 #endif 3084 3085 // HCI_EVENT_DISCONNECTION_COMPLETE 3086 // has been split, to first notify stack before shutting connection down 3087 // see end of function, too. 3088 case HCI_EVENT_DISCONNECTION_COMPLETE: 3089 if (packet[2]) break; // status != 0 3090 handle = little_endian_read_16(packet, 3); 3091 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3092 if (hci_stack->acl_fragmentation_total_size > 0u) { 3093 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3094 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3095 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3096 hci_stack->acl_fragmentation_total_size = 0; 3097 hci_stack->acl_fragmentation_pos = 0; 3098 if (release_buffer){ 3099 hci_release_packet_buffer(); 3100 } 3101 } 3102 } 3103 3104 conn = hci_connection_for_handle(handle); 3105 if (!conn) break; 3106 #ifdef ENABLE_CLASSIC 3107 // pairing failed if it was ongoing 3108 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3109 #endif 3110 3111 // emit dedicatd bonding event 3112 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3113 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3114 } 3115 3116 // mark connection for shutdown, stop timers, reset state 3117 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3118 hci_connection_stop_timer(conn); 3119 hci_connection_init(conn); 3120 3121 #ifdef ENABLE_BLE 3122 #ifdef ENABLE_LE_PERIPHERAL 3123 // re-enable advertisements for le connections if active 3124 if (hci_is_le_connection(conn)){ 3125 hci_update_advertisements_enabled_for_current_roles(); 3126 } 3127 #endif 3128 #endif 3129 break; 3130 3131 case HCI_EVENT_HARDWARE_ERROR: 3132 log_error("Hardware Error: 0x%02x", packet[2]); 3133 if (hci_stack->hardware_error_callback){ 3134 (*hci_stack->hardware_error_callback)(packet[2]); 3135 } else { 3136 // if no special requests, just reboot stack 3137 hci_power_control_off(); 3138 hci_power_control_on(); 3139 } 3140 break; 3141 3142 #ifdef ENABLE_CLASSIC 3143 case HCI_EVENT_ROLE_CHANGE: 3144 if (packet[2]) break; // status != 0 3145 reverse_bd_addr(&packet[3], addr); 3146 addr_type = BD_ADDR_TYPE_ACL; 3147 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3148 if (!conn) break; 3149 conn->role = packet[9]; 3150 break; 3151 #endif 3152 3153 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3154 // release packet buffer only for asynchronous transport and if there are not further fragements 3155 if (hci_transport_synchronous()) { 3156 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3157 return; // instead of break: to avoid re-entering hci_run() 3158 } 3159 hci_stack->acl_fragmentation_tx_active = 0; 3160 if (hci_stack->acl_fragmentation_total_size) break; 3161 hci_release_packet_buffer(); 3162 3163 // L2CAP receives this event via the hci_emit_event below 3164 3165 #ifdef ENABLE_CLASSIC 3166 // For SCO, we do the can_send_now_check here 3167 hci_notify_if_sco_can_send_now(); 3168 #endif 3169 break; 3170 3171 #ifdef ENABLE_CLASSIC 3172 case HCI_EVENT_SCO_CAN_SEND_NOW: 3173 // For SCO, we do the can_send_now_check here 3174 hci_stack->sco_can_send_now = true; 3175 hci_notify_if_sco_can_send_now(); 3176 return; 3177 3178 // explode inquriy results for easier consumption 3179 case HCI_EVENT_INQUIRY_RESULT: 3180 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3181 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3182 gap_inquiry_explode(packet, size); 3183 break; 3184 #endif 3185 3186 #ifdef ENABLE_BLE 3187 case HCI_EVENT_LE_META: 3188 switch (packet[2]){ 3189 #ifdef ENABLE_LE_CENTRAL 3190 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3191 // log_info("advertising report received"); 3192 if (!hci_stack->le_scanning_enabled) break; 3193 le_handle_advertisement_report(packet, size); 3194 break; 3195 #endif 3196 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3197 event_handle_le_connection_complete(packet); 3198 break; 3199 3200 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3201 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3202 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3203 conn = hci_connection_for_handle(handle); 3204 if (!conn) break; 3205 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3206 break; 3207 3208 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3209 // connection 3210 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3211 conn = hci_connection_for_handle(handle); 3212 if (conn) { 3213 // read arguments 3214 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3215 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3216 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3217 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3218 3219 // validate against current connection parameter range 3220 le_connection_parameter_range_t existing_range; 3221 gap_get_connection_parameter_range(&existing_range); 3222 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3223 if (update_parameter){ 3224 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3225 conn->le_conn_interval_min = le_conn_interval_min; 3226 conn->le_conn_interval_max = le_conn_interval_max; 3227 conn->le_conn_latency = le_conn_latency; 3228 conn->le_supervision_timeout = le_supervision_timeout; 3229 } else { 3230 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3231 } 3232 } 3233 break; 3234 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3235 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3236 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3237 conn = hci_connection_for_handle(handle); 3238 if (conn) { 3239 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3240 } 3241 break; 3242 #endif 3243 default: 3244 break; 3245 } 3246 break; 3247 #endif 3248 case HCI_EVENT_VENDOR_SPECIFIC: 3249 // Vendor specific commands often create vendor specific event instead of num completed packets 3250 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3251 switch (hci_stack->manufacturer){ 3252 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3253 hci_stack->num_cmd_packets = 1; 3254 break; 3255 default: 3256 break; 3257 } 3258 break; 3259 default: 3260 break; 3261 } 3262 3263 handle_event_for_current_stack_state(packet, size); 3264 3265 // notify upper stack 3266 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3267 3268 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3269 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3270 handle = little_endian_read_16(packet, 3); 3271 hci_connection_t * aConn = hci_connection_for_handle(handle); 3272 // discard connection if app did not trigger a reconnect in the event handler 3273 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3274 hci_shutdown_connection(aConn); 3275 } 3276 } 3277 3278 // execute main loop 3279 hci_run(); 3280 } 3281 3282 #ifdef ENABLE_CLASSIC 3283 3284 #ifdef ENABLE_SCO_OVER_HCI 3285 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3286 static void sco_schedule_tx(hci_connection_t * conn); 3287 3288 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3289 log_debug("SCO TX Timeout"); 3290 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3291 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3292 if (!conn) return; 3293 3294 // trigger send 3295 conn->sco_tx_ready = 1; 3296 // extra packet if CVSD but SCO buffer is too short 3297 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3298 conn->sco_tx_ready++; 3299 } 3300 hci_notify_if_sco_can_send_now(); 3301 } 3302 3303 3304 #define SCO_TX_AFTER_RX_MS (6) 3305 3306 static void sco_schedule_tx(hci_connection_t * conn){ 3307 3308 uint32_t now = btstack_run_loop_get_time_ms(); 3309 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3310 int time_delta_ms = sco_tx_ms - now; 3311 3312 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3313 3314 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3315 btstack_run_loop_remove_timer(timer); 3316 btstack_run_loop_set_timer(timer, time_delta_ms); 3317 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3318 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3319 btstack_run_loop_add_timer(timer); 3320 } 3321 #endif 3322 3323 static void sco_handler(uint8_t * packet, uint16_t size){ 3324 // lookup connection struct 3325 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3326 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3327 if (!conn) return; 3328 3329 #ifdef ENABLE_SCO_OVER_HCI 3330 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3331 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3332 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3333 packet[2] = 0x3c; 3334 memmove(&packet[3], &packet[23], 63); 3335 size = 63; 3336 } 3337 } 3338 3339 if (hci_have_usb_transport()){ 3340 // Nothing to do 3341 } else { 3342 // 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); 3343 if (hci_stack->synchronous_flow_control_enabled == 0){ 3344 uint32_t now = btstack_run_loop_get_time_ms(); 3345 3346 if (!conn->sco_rx_valid){ 3347 // ignore first 10 packets 3348 conn->sco_rx_count++; 3349 // log_debug("sco rx count %u", conn->sco_rx_count); 3350 if (conn->sco_rx_count == 10) { 3351 // use first timestamp as is and pretent it just started 3352 conn->sco_rx_ms = now; 3353 conn->sco_rx_valid = 1; 3354 conn->sco_rx_count = 0; 3355 sco_schedule_tx(conn); 3356 } 3357 } else { 3358 // track expected arrival timme 3359 conn->sco_rx_count++; 3360 conn->sco_rx_ms += 7; 3361 int delta = (int32_t) (now - conn->sco_rx_ms); 3362 if (delta > 0){ 3363 conn->sco_rx_ms++; 3364 } 3365 // log_debug("sco rx %u", conn->sco_rx_ms); 3366 sco_schedule_tx(conn); 3367 } 3368 } 3369 } 3370 #endif 3371 3372 // deliver to app 3373 if (hci_stack->sco_packet_handler) { 3374 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3375 } 3376 3377 #ifdef HAVE_SCO_TRANSPORT 3378 // We can send one packet for each received packet 3379 conn->sco_tx_ready++; 3380 hci_notify_if_sco_can_send_now(); 3381 #endif 3382 3383 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3384 conn->num_packets_completed++; 3385 hci_stack->host_completed_packets = 1; 3386 hci_run(); 3387 #endif 3388 } 3389 #endif 3390 3391 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3392 hci_dump_packet(packet_type, 1, packet, size); 3393 switch (packet_type) { 3394 case HCI_EVENT_PACKET: 3395 event_handler(packet, size); 3396 break; 3397 case HCI_ACL_DATA_PACKET: 3398 acl_handler(packet, size); 3399 break; 3400 #ifdef ENABLE_CLASSIC 3401 case HCI_SCO_DATA_PACKET: 3402 sco_handler(packet, size); 3403 break; 3404 #endif 3405 default: 3406 break; 3407 } 3408 } 3409 3410 /** 3411 * @brief Add event packet handler. 3412 */ 3413 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3414 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3415 } 3416 3417 /** 3418 * @brief Remove event packet handler. 3419 */ 3420 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3421 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3422 } 3423 3424 /** Register HCI packet handlers */ 3425 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3426 hci_stack->acl_packet_handler = handler; 3427 } 3428 3429 #ifdef ENABLE_CLASSIC 3430 /** 3431 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3432 */ 3433 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3434 hci_stack->sco_packet_handler = handler; 3435 } 3436 #endif 3437 3438 static void hci_state_reset(void){ 3439 // no connections yet 3440 hci_stack->connections = NULL; 3441 3442 // keep discoverable/connectable as this has been requested by the client(s) 3443 // hci_stack->discoverable = 0; 3444 // hci_stack->connectable = 0; 3445 // hci_stack->bondable = 1; 3446 // hci_stack->own_addr_type = 0; 3447 3448 // buffer is free 3449 hci_stack->hci_packet_buffer_reserved = false; 3450 3451 // no pending cmds 3452 hci_stack->decline_reason = 0; 3453 3454 hci_stack->secure_connections_active = false; 3455 3456 #ifdef ENABLE_CLASSIC 3457 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3458 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3459 3460 hci_stack->gap_tasks = 3461 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3462 GAP_TASK_SET_CLASS_OF_DEVICE | 3463 GAP_TASK_SET_LOCAL_NAME | 3464 GAP_TASK_SET_EIR_DATA | 3465 GAP_TASK_WRITE_SCAN_ENABLE | 3466 GAP_TASK_WRITE_PAGE_TIMEOUT; 3467 #endif 3468 3469 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3470 hci_stack->classic_read_local_oob_data = false; 3471 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3472 #endif 3473 3474 // LE 3475 #ifdef ENABLE_BLE 3476 memset(hci_stack->le_random_address, 0, 6); 3477 hci_stack->le_random_address_set = 0; 3478 #endif 3479 #ifdef ENABLE_LE_CENTRAL 3480 hci_stack->le_scanning_active = false; 3481 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3482 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3483 hci_stack->le_whitelist_capacity = 0; 3484 #endif 3485 #ifdef ENABLE_LE_PERIPHERAL 3486 hci_stack->le_advertisements_active = false; 3487 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3488 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3489 } 3490 if (hci_stack->le_advertisements_data != NULL){ 3491 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3492 } 3493 #endif 3494 } 3495 3496 #ifdef ENABLE_CLASSIC 3497 /** 3498 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3499 */ 3500 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3501 // store and open remote device db 3502 hci_stack->link_key_db = link_key_db; 3503 if (hci_stack->link_key_db) { 3504 hci_stack->link_key_db->open(); 3505 } 3506 } 3507 #endif 3508 3509 void hci_init(const hci_transport_t *transport, const void *config){ 3510 3511 #ifdef HAVE_MALLOC 3512 if (!hci_stack) { 3513 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3514 } 3515 #else 3516 hci_stack = &hci_stack_static; 3517 #endif 3518 memset(hci_stack, 0, sizeof(hci_stack_t)); 3519 3520 // reference to use transport layer implementation 3521 hci_stack->hci_transport = transport; 3522 3523 // reference to used config 3524 hci_stack->config = config; 3525 3526 // setup pointer for outgoing packet buffer 3527 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3528 3529 // max acl payload size defined in config.h 3530 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3531 3532 // register packet handlers with transport 3533 transport->register_packet_handler(&packet_handler); 3534 3535 hci_stack->state = HCI_STATE_OFF; 3536 3537 // class of device 3538 hci_stack->class_of_device = 0x007a020c; // Smartphone 3539 3540 // bondable by default 3541 hci_stack->bondable = 1; 3542 3543 #ifdef ENABLE_CLASSIC 3544 // classic name 3545 hci_stack->local_name = default_classic_name; 3546 3547 // Master slave policy 3548 hci_stack->master_slave_policy = 1; 3549 3550 // Allow Role Switch 3551 hci_stack->allow_role_switch = 1; 3552 3553 // Default / minimum security level = 2 3554 hci_stack->gap_security_level = LEVEL_2; 3555 3556 // Default Security Mode 4 3557 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3558 3559 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3560 hci_stack->gap_required_encyrption_key_size = 7; 3561 3562 // Link Supervision Timeout 3563 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3564 3565 #endif 3566 3567 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3568 hci_stack->ssp_enable = 1; 3569 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3570 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3571 hci_stack->ssp_auto_accept = 1; 3572 3573 // Secure Connections: enable (requires support from Controller) 3574 hci_stack->secure_connections_enable = true; 3575 3576 // voice setting - signed 16 bit pcm data with CVSD over the air 3577 hci_stack->sco_voice_setting = 0x60; 3578 3579 #ifdef ENABLE_LE_CENTRAL 3580 // connection parameter to use for outgoing connections 3581 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3582 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3583 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3584 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3585 hci_stack->le_connection_latency = 4; // 4 3586 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3587 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3588 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3589 3590 // default LE Scanning 3591 hci_stack->le_scan_type = 0x1; // active 3592 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3593 hci_stack->le_scan_window = 0x30; // 30 ms 3594 #endif 3595 3596 #ifdef ENABLE_LE_PERIPHERAL 3597 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3598 #endif 3599 3600 // connection parameter range used to answer connection parameter update requests in l2cap 3601 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3602 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3603 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3604 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3605 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3606 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3607 3608 hci_state_reset(); 3609 } 3610 3611 void hci_deinit(void){ 3612 #ifdef HAVE_MALLOC 3613 if (hci_stack) { 3614 free(hci_stack); 3615 } 3616 #endif 3617 hci_stack = NULL; 3618 3619 #ifdef ENABLE_CLASSIC 3620 disable_l2cap_timeouts = 0; 3621 #endif 3622 } 3623 3624 /** 3625 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3626 */ 3627 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3628 hci_stack->chipset = chipset_driver; 3629 3630 // reset chipset driver - init is also called on power_up 3631 if (hci_stack->chipset && hci_stack->chipset->init){ 3632 hci_stack->chipset->init(hci_stack->config); 3633 } 3634 } 3635 3636 /** 3637 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3638 */ 3639 void hci_set_control(const btstack_control_t *hardware_control){ 3640 // references to used control implementation 3641 hci_stack->control = hardware_control; 3642 // init with transport config 3643 hardware_control->init(hci_stack->config); 3644 } 3645 3646 void hci_close(void){ 3647 3648 #ifdef ENABLE_CLASSIC 3649 // close remote device db 3650 if (hci_stack->link_key_db) { 3651 hci_stack->link_key_db->close(); 3652 } 3653 #endif 3654 3655 btstack_linked_list_iterator_t lit; 3656 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3657 while (btstack_linked_list_iterator_has_next(&lit)){ 3658 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3659 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3660 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3661 hci_shutdown_connection(connection); 3662 } 3663 3664 hci_power_control(HCI_POWER_OFF); 3665 3666 #ifdef HAVE_MALLOC 3667 free(hci_stack); 3668 #endif 3669 hci_stack = NULL; 3670 } 3671 3672 #ifdef HAVE_SCO_TRANSPORT 3673 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3674 hci_stack->sco_transport = sco_transport; 3675 sco_transport->register_packet_handler(&packet_handler); 3676 } 3677 #endif 3678 3679 #ifdef ENABLE_CLASSIC 3680 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3681 // validate ranage and set 3682 if (encryption_key_size < 7) return; 3683 if (encryption_key_size > 16) return; 3684 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3685 } 3686 3687 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3688 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3689 hci_stack->gap_security_mode = security_mode; 3690 return ERROR_CODE_SUCCESS; 3691 } else { 3692 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3693 } 3694 } 3695 3696 gap_security_mode_t gap_get_security_mode(void){ 3697 return hci_stack->gap_security_mode; 3698 } 3699 3700 void gap_set_security_level(gap_security_level_t security_level){ 3701 hci_stack->gap_security_level = security_level; 3702 } 3703 3704 gap_security_level_t gap_get_security_level(void){ 3705 if (hci_stack->gap_secure_connections_only_mode){ 3706 return LEVEL_4; 3707 } 3708 return hci_stack->gap_security_level; 3709 } 3710 3711 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3712 hci_stack->gap_minimal_service_security_level = security_level; 3713 } 3714 3715 void gap_set_secure_connections_only_mode(bool enable){ 3716 hci_stack->gap_secure_connections_only_mode = enable; 3717 } 3718 3719 bool gap_get_secure_connections_only_mode(void){ 3720 return hci_stack->gap_secure_connections_only_mode; 3721 } 3722 #endif 3723 3724 #ifdef ENABLE_CLASSIC 3725 void gap_set_class_of_device(uint32_t class_of_device){ 3726 hci_stack->class_of_device = class_of_device; 3727 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3728 hci_run(); 3729 } 3730 3731 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3732 hci_stack->default_link_policy_settings = default_link_policy_settings; 3733 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3734 hci_run(); 3735 } 3736 3737 void gap_set_allow_role_switch(bool allow_role_switch){ 3738 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3739 } 3740 3741 uint8_t hci_get_allow_role_switch(void){ 3742 return hci_stack->allow_role_switch; 3743 } 3744 3745 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3746 hci_stack->link_supervision_timeout = link_supervision_timeout; 3747 } 3748 3749 void hci_disable_l2cap_timeout_check(void){ 3750 disable_l2cap_timeouts = 1; 3751 } 3752 #endif 3753 3754 #ifndef HAVE_HOST_CONTROLLER_API 3755 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3756 void hci_set_bd_addr(bd_addr_t addr){ 3757 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3758 hci_stack->custom_bd_addr_set = 1; 3759 } 3760 #endif 3761 3762 // State-Module-Driver overview 3763 // state module low-level 3764 // HCI_STATE_OFF off close 3765 // HCI_STATE_INITIALIZING, on open 3766 // HCI_STATE_WORKING, on open 3767 // HCI_STATE_HALTING, on open 3768 // HCI_STATE_SLEEPING, off/sleep close 3769 // HCI_STATE_FALLING_ASLEEP on open 3770 3771 static int hci_power_control_on(void){ 3772 3773 // power on 3774 int err = 0; 3775 if (hci_stack->control && hci_stack->control->on){ 3776 err = (*hci_stack->control->on)(); 3777 } 3778 if (err){ 3779 log_error( "POWER_ON failed"); 3780 hci_emit_hci_open_failed(); 3781 return err; 3782 } 3783 3784 // int chipset driver 3785 if (hci_stack->chipset && hci_stack->chipset->init){ 3786 hci_stack->chipset->init(hci_stack->config); 3787 } 3788 3789 // init transport 3790 if (hci_stack->hci_transport->init){ 3791 hci_stack->hci_transport->init(hci_stack->config); 3792 } 3793 3794 // open transport 3795 err = hci_stack->hci_transport->open(); 3796 if (err){ 3797 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3798 if (hci_stack->control && hci_stack->control->off){ 3799 (*hci_stack->control->off)(); 3800 } 3801 hci_emit_hci_open_failed(); 3802 return err; 3803 } 3804 return 0; 3805 } 3806 3807 static void hci_power_control_off(void){ 3808 3809 log_info("hci_power_control_off"); 3810 3811 // close low-level device 3812 hci_stack->hci_transport->close(); 3813 3814 log_info("hci_power_control_off - hci_transport closed"); 3815 3816 // power off 3817 if (hci_stack->control && hci_stack->control->off){ 3818 (*hci_stack->control->off)(); 3819 } 3820 3821 log_info("hci_power_control_off - control closed"); 3822 3823 hci_stack->state = HCI_STATE_OFF; 3824 } 3825 3826 static void hci_power_control_sleep(void){ 3827 3828 log_info("hci_power_control_sleep"); 3829 3830 #if 0 3831 // don't close serial port during sleep 3832 3833 // close low-level device 3834 hci_stack->hci_transport->close(hci_stack->config); 3835 #endif 3836 3837 // sleep mode 3838 if (hci_stack->control && hci_stack->control->sleep){ 3839 (*hci_stack->control->sleep)(); 3840 } 3841 3842 hci_stack->state = HCI_STATE_SLEEPING; 3843 } 3844 3845 static int hci_power_control_wake(void){ 3846 3847 log_info("hci_power_control_wake"); 3848 3849 // wake on 3850 if (hci_stack->control && hci_stack->control->wake){ 3851 (*hci_stack->control->wake)(); 3852 } 3853 3854 #if 0 3855 // open low-level device 3856 int err = hci_stack->hci_transport->open(hci_stack->config); 3857 if (err){ 3858 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3859 if (hci_stack->control && hci_stack->control->off){ 3860 (*hci_stack->control->off)(); 3861 } 3862 hci_emit_hci_open_failed(); 3863 return err; 3864 } 3865 #endif 3866 3867 return 0; 3868 } 3869 3870 static void hci_power_transition_to_initializing(void){ 3871 // set up state machine 3872 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3873 hci_stack->hci_packet_buffer_reserved = false; 3874 hci_stack->state = HCI_STATE_INITIALIZING; 3875 hci_stack->substate = HCI_INIT_SEND_RESET; 3876 } 3877 3878 // returns error 3879 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3880 int err; 3881 switch (power_mode){ 3882 case HCI_POWER_ON: 3883 err = hci_power_control_on(); 3884 if (err != 0) { 3885 log_error("hci_power_control_on() error %d", err); 3886 return err; 3887 } 3888 hci_power_transition_to_initializing(); 3889 break; 3890 case HCI_POWER_OFF: 3891 // do nothing 3892 break; 3893 case HCI_POWER_SLEEP: 3894 // do nothing (with SLEEP == OFF) 3895 break; 3896 default: 3897 btstack_assert(false); 3898 break; 3899 } 3900 return ERROR_CODE_SUCCESS; 3901 } 3902 3903 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3904 switch (power_mode){ 3905 case HCI_POWER_ON: 3906 // do nothing 3907 break; 3908 case HCI_POWER_OFF: 3909 // no connections yet, just turn it off 3910 hci_power_control_off(); 3911 break; 3912 case HCI_POWER_SLEEP: 3913 // no connections yet, just turn it off 3914 hci_power_control_sleep(); 3915 break; 3916 default: 3917 btstack_assert(false); 3918 break; 3919 } 3920 return ERROR_CODE_SUCCESS; 3921 } 3922 3923 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3924 switch (power_mode){ 3925 case HCI_POWER_ON: 3926 // do nothing 3927 break; 3928 case HCI_POWER_OFF: 3929 // see hci_run 3930 hci_stack->state = HCI_STATE_HALTING; 3931 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3932 break; 3933 case HCI_POWER_SLEEP: 3934 // see hci_run 3935 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3936 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3937 break; 3938 default: 3939 btstack_assert(false); 3940 break; 3941 } 3942 return ERROR_CODE_SUCCESS; 3943 } 3944 3945 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3946 switch (power_mode){ 3947 case HCI_POWER_ON: 3948 hci_power_transition_to_initializing(); 3949 break; 3950 case HCI_POWER_OFF: 3951 // do nothing 3952 break; 3953 case HCI_POWER_SLEEP: 3954 // see hci_run 3955 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3956 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3957 break; 3958 default: 3959 btstack_assert(false); 3960 break; 3961 } 3962 return ERROR_CODE_SUCCESS; 3963 } 3964 3965 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3966 switch (power_mode){ 3967 case HCI_POWER_ON: 3968 hci_power_transition_to_initializing(); 3969 break; 3970 case HCI_POWER_OFF: 3971 // see hci_run 3972 hci_stack->state = HCI_STATE_HALTING; 3973 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3974 break; 3975 case HCI_POWER_SLEEP: 3976 // do nothing 3977 break; 3978 default: 3979 btstack_assert(false); 3980 break; 3981 } 3982 return ERROR_CODE_SUCCESS; 3983 } 3984 3985 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3986 int err; 3987 switch (power_mode){ 3988 case HCI_POWER_ON: 3989 err = hci_power_control_wake(); 3990 if (err) return err; 3991 hci_power_transition_to_initializing(); 3992 break; 3993 case HCI_POWER_OFF: 3994 hci_stack->state = HCI_STATE_HALTING; 3995 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3996 break; 3997 case HCI_POWER_SLEEP: 3998 // do nothing 3999 break; 4000 default: 4001 btstack_assert(false); 4002 break; 4003 } 4004 return ERROR_CODE_SUCCESS; 4005 } 4006 4007 int hci_power_control(HCI_POWER_MODE power_mode){ 4008 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4009 int err = 0; 4010 switch (hci_stack->state){ 4011 case HCI_STATE_OFF: 4012 err = hci_power_control_state_off(power_mode); 4013 break; 4014 case HCI_STATE_INITIALIZING: 4015 err = hci_power_control_state_initializing(power_mode); 4016 break; 4017 case HCI_STATE_WORKING: 4018 err = hci_power_control_state_working(power_mode); 4019 break; 4020 case HCI_STATE_HALTING: 4021 err = hci_power_control_state_halting(power_mode); 4022 break; 4023 case HCI_STATE_FALLING_ASLEEP: 4024 err = hci_power_control_state_falling_asleep(power_mode); 4025 break; 4026 case HCI_STATE_SLEEPING: 4027 err = hci_power_control_state_sleeping(power_mode); 4028 break; 4029 default: 4030 btstack_assert(false); 4031 break; 4032 } 4033 if (err != 0){ 4034 return err; 4035 } 4036 4037 // create internal event 4038 hci_emit_state(); 4039 4040 // trigger next/first action 4041 hci_run(); 4042 4043 return 0; 4044 } 4045 4046 4047 #ifdef ENABLE_CLASSIC 4048 4049 static void hci_update_scan_enable(void){ 4050 // 2 = page scan, 1 = inq scan 4051 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4052 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4053 hci_run(); 4054 } 4055 4056 void gap_discoverable_control(uint8_t enable){ 4057 if (enable) enable = 1; // normalize argument 4058 4059 if (hci_stack->discoverable == enable){ 4060 hci_emit_discoverable_enabled(hci_stack->discoverable); 4061 return; 4062 } 4063 4064 hci_stack->discoverable = enable; 4065 hci_update_scan_enable(); 4066 } 4067 4068 void gap_connectable_control(uint8_t enable){ 4069 if (enable) enable = 1; // normalize argument 4070 4071 // don't emit event 4072 if (hci_stack->connectable == enable) return; 4073 4074 hci_stack->connectable = enable; 4075 hci_update_scan_enable(); 4076 } 4077 #endif 4078 4079 void gap_local_bd_addr(bd_addr_t address_buffer){ 4080 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4081 } 4082 4083 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4084 static void hci_host_num_completed_packets(void){ 4085 4086 // create packet manually as arrays are not supported and num_commands should not get reduced 4087 hci_reserve_packet_buffer(); 4088 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4089 4090 uint16_t size = 0; 4091 uint16_t num_handles = 0; 4092 packet[size++] = 0x35; 4093 packet[size++] = 0x0c; 4094 size++; // skip param len 4095 size++; // skip num handles 4096 4097 // add { handle, packets } entries 4098 btstack_linked_item_t * it; 4099 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4100 hci_connection_t * connection = (hci_connection_t *) it; 4101 if (connection->num_packets_completed){ 4102 little_endian_store_16(packet, size, connection->con_handle); 4103 size += 2; 4104 little_endian_store_16(packet, size, connection->num_packets_completed); 4105 size += 2; 4106 // 4107 num_handles++; 4108 connection->num_packets_completed = 0; 4109 } 4110 } 4111 4112 packet[2] = size - 3; 4113 packet[3] = num_handles; 4114 4115 hci_stack->host_completed_packets = 0; 4116 4117 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4118 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4119 4120 // release packet buffer for synchronous transport implementations 4121 if (hci_transport_synchronous()){ 4122 hci_release_packet_buffer(); 4123 hci_emit_transport_packet_sent(); 4124 } 4125 } 4126 #endif 4127 4128 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4129 UNUSED(ds); 4130 hci_stack->substate = HCI_HALTING_CLOSE; 4131 // allow packet handlers to defer final shutdown 4132 hci_emit_state(); 4133 hci_run(); 4134 } 4135 4136 static bool hci_run_acl_fragments(void){ 4137 if (hci_stack->acl_fragmentation_total_size > 0u) { 4138 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4139 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4140 if (connection) { 4141 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4142 hci_send_acl_packet_fragments(connection); 4143 return true; 4144 } 4145 } else { 4146 // connection gone -> discard further fragments 4147 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4148 hci_stack->acl_fragmentation_total_size = 0; 4149 hci_stack->acl_fragmentation_pos = 0; 4150 } 4151 } 4152 return false; 4153 } 4154 4155 #ifdef ENABLE_CLASSIC 4156 static bool hci_run_general_gap_classic(void){ 4157 4158 // assert stack is working and classic is active 4159 if (hci_classic_supported() == false) return false; 4160 if (hci_stack->state != HCI_STATE_WORKING) return false; 4161 4162 // decline incoming connections 4163 if (hci_stack->decline_reason){ 4164 uint8_t reason = hci_stack->decline_reason; 4165 hci_stack->decline_reason = 0; 4166 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4167 return true; 4168 } 4169 4170 if (hci_stack->gap_tasks != 0){ 4171 hci_run_gap_tasks_classic(); 4172 return true; 4173 } 4174 4175 // start/stop inquiry 4176 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4177 uint8_t duration = hci_stack->inquiry_state; 4178 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4179 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4180 return true; 4181 } 4182 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4183 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4184 hci_send_cmd(&hci_inquiry_cancel); 4185 return true; 4186 } 4187 // remote name request 4188 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4189 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4190 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4191 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4192 return true; 4193 } 4194 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4195 // Local OOB data 4196 if (hci_stack->classic_read_local_oob_data){ 4197 hci_stack->classic_read_local_oob_data = false; 4198 if (hci_stack->local_supported_commands[1] & 0x10u){ 4199 hci_send_cmd(&hci_read_local_extended_oob_data); 4200 } else { 4201 hci_send_cmd(&hci_read_local_oob_data); 4202 } 4203 } 4204 #endif 4205 // pairing 4206 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4207 uint8_t state = hci_stack->gap_pairing_state; 4208 uint8_t pin_code[16]; 4209 switch (state){ 4210 case GAP_PAIRING_STATE_SEND_PIN: 4211 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4212 memset(pin_code, 0, 16); 4213 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4214 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4215 break; 4216 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4217 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4218 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4219 break; 4220 case GAP_PAIRING_STATE_SEND_PASSKEY: 4221 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4222 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4223 break; 4224 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4225 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4226 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4227 break; 4228 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4229 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4230 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4231 break; 4232 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4233 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4234 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4235 break; 4236 default: 4237 break; 4238 } 4239 return true; 4240 } 4241 return false; 4242 } 4243 #endif 4244 4245 #ifdef ENABLE_BLE 4246 static bool hci_run_general_gap_le(void){ 4247 4248 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4249 4250 if (hci_stack->state != HCI_STATE_WORKING) return false; 4251 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4252 4253 4254 // Phase 1: collect what to stop 4255 4256 bool scanning_stop = false; 4257 bool connecting_stop = false; 4258 bool advertising_stop = false; 4259 4260 #ifndef ENABLE_LE_CENTRAL 4261 UNUSED(scanning_stop); 4262 UNUSED(connecting_stop); 4263 #endif 4264 #ifndef ENABLE_LE_PERIPHERAL 4265 UNUSED(advertising_stop); 4266 #endif 4267 4268 // check if own address changes 4269 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4270 4271 // check if whitelist needs modification 4272 bool whitelist_modification_pending = false; 4273 btstack_linked_list_iterator_t lit; 4274 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4275 while (btstack_linked_list_iterator_has_next(&lit)){ 4276 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4277 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4278 whitelist_modification_pending = true; 4279 break; 4280 } 4281 } 4282 // check if resolving list needs modification 4283 bool resolving_list_modification_pending = false; 4284 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4285 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4286 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4287 resolving_list_modification_pending = true; 4288 } 4289 #endif 4290 4291 #ifdef ENABLE_LE_CENTRAL 4292 // scanning control 4293 if (hci_stack->le_scanning_active) { 4294 // stop if: 4295 // - parameter change required 4296 // - it's disabled 4297 // - whitelist change required but used for scanning 4298 // - resolving list modified 4299 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4300 if ((hci_stack->le_scanning_param_update) || 4301 !hci_stack->le_scanning_enabled || 4302 scanning_uses_whitelist || 4303 resolving_list_modification_pending){ 4304 4305 scanning_stop = true; 4306 } 4307 } 4308 #endif 4309 4310 #ifdef ENABLE_LE_CENTRAL 4311 // connecting control 4312 bool connecting_with_whitelist; 4313 switch (hci_stack->le_connecting_state){ 4314 case LE_CONNECTING_DIRECT: 4315 case LE_CONNECTING_WHITELIST: 4316 // stop connecting if: 4317 // - connecting uses white and whitelist modification pending 4318 // - if it got disabled 4319 // - resolving list modified 4320 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4321 if ((connecting_with_whitelist && whitelist_modification_pending) || 4322 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4323 resolving_list_modification_pending) { 4324 4325 connecting_stop = true; 4326 } 4327 break; 4328 default: 4329 break; 4330 } 4331 #endif 4332 4333 #ifdef ENABLE_LE_PERIPHERAL 4334 // le advertisement control 4335 if (hci_stack->le_advertisements_active){ 4336 // stop if: 4337 // - parameter change required 4338 // - random address used in advertising and changes 4339 // - it's disabled 4340 // - whitelist change required but used for advertisement filter policy 4341 // - resolving list modified 4342 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4343 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4344 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4345 if (advertising_change || 4346 (advertising_uses_random_address && random_address_change) || 4347 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4348 (advertising_uses_whitelist && whitelist_modification_pending) || 4349 resolving_list_modification_pending) { 4350 4351 advertising_stop = true; 4352 } 4353 } 4354 #endif 4355 4356 4357 // Phase 2: stop everything that should be off during modifications 4358 4359 #ifdef ENABLE_LE_CENTRAL 4360 if (scanning_stop){ 4361 hci_stack->le_scanning_active = false; 4362 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4363 return true; 4364 } 4365 #endif 4366 4367 #ifdef ENABLE_LE_CENTRAL 4368 if (connecting_stop){ 4369 hci_send_cmd(&hci_le_create_connection_cancel); 4370 return true; 4371 } 4372 #endif 4373 4374 #ifdef ENABLE_LE_PERIPHERAL 4375 if (advertising_stop){ 4376 hci_stack->le_advertisements_active = false; 4377 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4378 return true; 4379 } 4380 #endif 4381 4382 // Phase 3: modify 4383 4384 if (random_address_change){ 4385 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4386 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4387 return true; 4388 } 4389 4390 #ifdef ENABLE_LE_CENTRAL 4391 if (hci_stack->le_scanning_param_update){ 4392 hci_stack->le_scanning_param_update = false; 4393 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4394 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4395 return true; 4396 } 4397 #endif 4398 4399 #ifdef ENABLE_LE_PERIPHERAL 4400 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4401 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4402 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4403 hci_send_cmd(&hci_le_set_advertising_parameters, 4404 hci_stack->le_advertisements_interval_min, 4405 hci_stack->le_advertisements_interval_max, 4406 hci_stack->le_advertisements_type, 4407 hci_stack->le_advertisements_own_addr_type, 4408 hci_stack->le_advertisements_direct_address_type, 4409 hci_stack->le_advertisements_direct_address, 4410 hci_stack->le_advertisements_channel_map, 4411 hci_stack->le_advertisements_filter_policy); 4412 return true; 4413 } 4414 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4415 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4416 uint8_t adv_data_clean[31]; 4417 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4418 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4419 hci_stack->le_advertisements_data_len); 4420 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4421 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4422 return true; 4423 } 4424 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4425 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4426 uint8_t scan_data_clean[31]; 4427 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4428 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4429 hci_stack->le_scan_response_data_len); 4430 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4431 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4432 return true; 4433 } 4434 #endif 4435 4436 4437 #ifdef ENABLE_LE_CENTRAL 4438 // if connect with whitelist was active and is not cancelled yet, wait until next time 4439 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4440 #endif 4441 4442 // LE Whitelist Management 4443 if (whitelist_modification_pending){ 4444 // add/remove entries 4445 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4446 while (btstack_linked_list_iterator_has_next(&lit)){ 4447 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4448 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4449 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4450 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4451 return true; 4452 } 4453 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4454 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4455 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4456 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4457 return true; 4458 } 4459 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4460 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4461 btstack_memory_whitelist_entry_free(entry); 4462 } 4463 } 4464 } 4465 4466 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4467 // LE Resolving List Management 4468 if (resolving_list_supported) { 4469 uint16_t i; 4470 switch (hci_stack->le_resolving_list_state) { 4471 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4472 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4473 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4474 return true; 4475 case LE_RESOLVING_LIST_READ_SIZE: 4476 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4477 hci_send_cmd(&hci_le_read_resolving_list_size); 4478 return true; 4479 case LE_RESOLVING_LIST_SEND_CLEAR: 4480 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4481 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4482 sizeof(hci_stack->le_resolving_list_add_entries)); 4483 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4484 sizeof(hci_stack->le_resolving_list_remove_entries)); 4485 hci_send_cmd(&hci_le_clear_resolving_list); 4486 return true; 4487 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4488 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4489 uint8_t offset = i >> 3; 4490 uint8_t mask = 1 << (i & 7); 4491 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4492 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4493 bd_addr_t peer_identity_addreses; 4494 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4495 sm_key_t peer_irk; 4496 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4497 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4498 4499 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4500 // trigger whitelist entry 'update' (work around for controller bug) 4501 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4502 while (btstack_linked_list_iterator_has_next(&lit)) { 4503 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4504 if (entry->address_type != peer_identity_addr_type) continue; 4505 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4506 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4507 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4508 } 4509 #endif 4510 4511 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4512 peer_identity_addreses); 4513 return true; 4514 } 4515 4516 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4517 4518 /* fall through */ 4519 4520 case LE_RESOLVING_LIST_ADD_ENTRIES: 4521 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4522 uint8_t offset = i >> 3; 4523 uint8_t mask = 1 << (i & 7); 4524 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4525 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4526 bd_addr_t peer_identity_addreses; 4527 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4528 sm_key_t peer_irk; 4529 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4530 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4531 const uint8_t *local_irk = gap_get_persistent_irk(); 4532 // command uses format specifier 'P' that stores 16-byte value without flip 4533 uint8_t local_irk_flipped[16]; 4534 uint8_t peer_irk_flipped[16]; 4535 reverse_128(local_irk, local_irk_flipped); 4536 reverse_128(peer_irk, peer_irk_flipped); 4537 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4538 peer_irk_flipped, local_irk_flipped); 4539 return true; 4540 } 4541 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4542 break; 4543 4544 default: 4545 break; 4546 } 4547 } 4548 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4549 #endif 4550 4551 // Phase 4: restore state 4552 4553 #ifdef ENABLE_LE_CENTRAL 4554 // re-start scanning 4555 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4556 hci_stack->le_scanning_active = true; 4557 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4558 return true; 4559 } 4560 #endif 4561 4562 #ifdef ENABLE_LE_CENTRAL 4563 // re-start connecting 4564 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4565 bd_addr_t null_addr; 4566 memset(null_addr, 0, 6); 4567 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4568 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4569 hci_send_cmd(&hci_le_create_connection, 4570 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4571 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4572 1, // use whitelist 4573 0, // peer address type 4574 null_addr, // peer bd addr 4575 hci_stack->le_connection_own_addr_type, // our addr type: 4576 hci_stack->le_connection_interval_min, // conn interval min 4577 hci_stack->le_connection_interval_max, // conn interval max 4578 hci_stack->le_connection_latency, // conn latency 4579 hci_stack->le_supervision_timeout, // conn latency 4580 hci_stack->le_minimum_ce_length, // min ce length 4581 hci_stack->le_maximum_ce_length // max ce length 4582 ); 4583 return true; 4584 } 4585 #endif 4586 4587 #ifdef ENABLE_LE_PERIPHERAL 4588 // re-start advertising 4589 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4590 // check if advertisements should be enabled given 4591 hci_stack->le_advertisements_active = true; 4592 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4593 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4594 return true; 4595 } 4596 #endif 4597 4598 return false; 4599 } 4600 #endif 4601 4602 static bool hci_run_general_pending_commands(void){ 4603 btstack_linked_item_t * it; 4604 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4605 hci_connection_t * connection = (hci_connection_t *) it; 4606 4607 switch(connection->state){ 4608 case SEND_CREATE_CONNECTION: 4609 switch(connection->address_type){ 4610 #ifdef ENABLE_CLASSIC 4611 case BD_ADDR_TYPE_ACL: 4612 log_info("sending hci_create_connection"); 4613 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4614 break; 4615 #endif 4616 default: 4617 #ifdef ENABLE_BLE 4618 #ifdef ENABLE_LE_CENTRAL 4619 log_info("sending hci_le_create_connection"); 4620 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4621 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4622 hci_send_cmd(&hci_le_create_connection, 4623 hci_stack->le_connection_scan_interval, // conn scan interval 4624 hci_stack->le_connection_scan_window, // conn scan windows 4625 0, // don't use whitelist 4626 connection->address_type, // peer address type 4627 connection->address, // peer bd addr 4628 hci_stack->le_connection_own_addr_type, // our addr type: 4629 hci_stack->le_connection_interval_min, // conn interval min 4630 hci_stack->le_connection_interval_max, // conn interval max 4631 hci_stack->le_connection_latency, // conn latency 4632 hci_stack->le_supervision_timeout, // conn latency 4633 hci_stack->le_minimum_ce_length, // min ce length 4634 hci_stack->le_maximum_ce_length // max ce length 4635 ); 4636 connection->state = SENT_CREATE_CONNECTION; 4637 #endif 4638 #endif 4639 break; 4640 } 4641 return true; 4642 4643 #ifdef ENABLE_CLASSIC 4644 case RECEIVED_CONNECTION_REQUEST: 4645 connection->role = HCI_ROLE_SLAVE; 4646 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4647 log_info("sending hci_accept_connection_request"); 4648 connection->state = ACCEPTED_CONNECTION_REQUEST; 4649 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4650 } 4651 return true; 4652 #endif 4653 4654 #ifdef ENABLE_BLE 4655 #ifdef ENABLE_LE_CENTRAL 4656 case SEND_CANCEL_CONNECTION: 4657 connection->state = SENT_CANCEL_CONNECTION; 4658 hci_send_cmd(&hci_le_create_connection_cancel); 4659 return true; 4660 #endif 4661 #endif 4662 case SEND_DISCONNECT: 4663 connection->state = SENT_DISCONNECT; 4664 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4665 return true; 4666 4667 default: 4668 break; 4669 } 4670 4671 // no further commands if connection is about to get shut down 4672 if (connection->state == SENT_DISCONNECT) continue; 4673 4674 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4675 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4676 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4677 return true; 4678 } 4679 4680 #ifdef ENABLE_CLASSIC 4681 4682 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4683 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4684 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4685 return true; 4686 } 4687 4688 // Handling link key request requires remote supported features 4689 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4690 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4691 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4692 4693 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4694 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4695 if (have_link_key && security_level_sufficient){ 4696 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4697 } else { 4698 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4699 } 4700 return true; 4701 } 4702 4703 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4704 log_info("denying to pin request"); 4705 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4706 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4707 return true; 4708 } 4709 4710 // security assessment requires remote features 4711 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4712 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4713 hci_ssp_assess_security_on_io_cap_request(connection); 4714 // 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 4715 } 4716 4717 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4718 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4719 // set authentication requirements: 4720 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4721 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4722 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4723 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4724 authreq |= 1; 4725 } 4726 bool bonding = hci_stack->bondable; 4727 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4728 // if we have received IO Cap Response, we're in responder role 4729 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4730 if (bonding && !remote_bonding){ 4731 log_info("Remote not bonding, dropping local flag"); 4732 bonding = false; 4733 } 4734 } 4735 if (bonding){ 4736 if (connection->bonding_flags & BONDING_DEDICATED){ 4737 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4738 } else { 4739 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4740 } 4741 } 4742 uint8_t have_oob_data = 0; 4743 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4744 if (connection->classic_oob_c_192 != NULL){ 4745 have_oob_data |= 1; 4746 } 4747 if (connection->classic_oob_c_256 != NULL){ 4748 have_oob_data |= 2; 4749 } 4750 #endif 4751 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4752 return true; 4753 } 4754 4755 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4756 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4757 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4758 return true; 4759 } 4760 4761 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4762 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4763 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4764 const uint8_t zero[16] = { 0 }; 4765 const uint8_t * r_192 = zero; 4766 const uint8_t * c_192 = zero; 4767 const uint8_t * r_256 = zero; 4768 const uint8_t * c_256 = zero; 4769 // verify P-256 OOB 4770 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4771 c_256 = connection->classic_oob_c_256; 4772 if (connection->classic_oob_r_256 != NULL) { 4773 r_256 = connection->classic_oob_r_256; 4774 } 4775 } 4776 // verify P-192 OOB 4777 if ((connection->classic_oob_c_192 != NULL)) { 4778 c_192 = connection->classic_oob_c_192; 4779 if (connection->classic_oob_r_192 != NULL) { 4780 r_192 = connection->classic_oob_r_192; 4781 } 4782 } 4783 4784 // assess security 4785 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4786 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4787 if (need_level_4 && !can_reach_level_4){ 4788 log_info("Level 4 required, but not possible -> abort"); 4789 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4790 // send oob negative reply 4791 c_256 = NULL; 4792 c_192 = NULL; 4793 } 4794 4795 // Reply 4796 if (c_256 != zero) { 4797 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4798 } else if (c_192 != zero){ 4799 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4800 } else { 4801 hci_stack->classic_oob_con_handle = connection->con_handle; 4802 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4803 } 4804 return true; 4805 } 4806 #endif 4807 4808 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4809 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4810 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4811 return true; 4812 } 4813 4814 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4815 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4816 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4817 return true; 4818 } 4819 4820 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4821 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4822 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4823 return true; 4824 } 4825 4826 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4827 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4828 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4829 connection->state = SENT_DISCONNECT; 4830 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4831 return true; 4832 } 4833 4834 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4835 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4836 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4837 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4838 return true; 4839 } 4840 4841 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4842 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4843 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4844 return true; 4845 } 4846 4847 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4848 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4849 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4850 return true; 4851 } 4852 4853 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4854 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4855 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4856 return true; 4857 } 4858 4859 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4860 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4861 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4862 return true; 4863 } 4864 4865 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4866 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4867 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4868 return true; 4869 } 4870 #endif 4871 4872 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4873 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4874 #ifdef ENABLE_CLASSIC 4875 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4876 #endif 4877 if (connection->state != SENT_DISCONNECT){ 4878 connection->state = SENT_DISCONNECT; 4879 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4880 return true; 4881 } 4882 } 4883 4884 #ifdef ENABLE_CLASSIC 4885 uint16_t sniff_min_interval; 4886 switch (connection->sniff_min_interval){ 4887 case 0: 4888 break; 4889 case 0xffff: 4890 connection->sniff_min_interval = 0; 4891 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4892 return true; 4893 default: 4894 sniff_min_interval = connection->sniff_min_interval; 4895 connection->sniff_min_interval = 0; 4896 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4897 return true; 4898 } 4899 4900 if (connection->sniff_subrating_max_latency != 0xffff){ 4901 uint16_t max_latency = connection->sniff_subrating_max_latency; 4902 connection->sniff_subrating_max_latency = 0; 4903 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4904 return true; 4905 } 4906 4907 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4908 uint8_t service_type = (uint8_t) connection->qos_service_type; 4909 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4910 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); 4911 return true; 4912 } 4913 4914 if (connection->request_role != HCI_ROLE_INVALID){ 4915 hci_role_t role = connection->request_role; 4916 connection->request_role = HCI_ROLE_INVALID; 4917 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4918 return true; 4919 } 4920 #endif 4921 4922 #ifdef ENABLE_BLE 4923 switch (connection->le_con_parameter_update_state){ 4924 // response to L2CAP CON PARAMETER UPDATE REQUEST 4925 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4926 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4927 hci_send_cmd(&hci_le_connection_update, 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_REPLY: 4932 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4933 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4934 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4935 0x0000, 0xffff); 4936 return true; 4937 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4938 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4939 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4940 return true; 4941 default: 4942 break; 4943 } 4944 if (connection->le_phy_update_all_phys != 0xffu){ 4945 uint8_t all_phys = connection->le_phy_update_all_phys; 4946 connection->le_phy_update_all_phys = 0xff; 4947 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); 4948 return true; 4949 } 4950 #endif 4951 } 4952 return false; 4953 } 4954 4955 static void hci_run(void){ 4956 4957 bool done; 4958 4959 // send continuation fragments first, as they block the prepared packet buffer 4960 done = hci_run_acl_fragments(); 4961 if (done) return; 4962 4963 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4964 // send host num completed packets next as they don't require num_cmd_packets > 0 4965 if (!hci_can_send_comand_packet_transport()) return; 4966 if (hci_stack->host_completed_packets){ 4967 hci_host_num_completed_packets(); 4968 return; 4969 } 4970 #endif 4971 4972 if (!hci_can_send_command_packet_now()) return; 4973 4974 // global/non-connection oriented commands 4975 4976 4977 #ifdef ENABLE_CLASSIC 4978 // general gap classic 4979 done = hci_run_general_gap_classic(); 4980 if (done) return; 4981 #endif 4982 4983 #ifdef ENABLE_BLE 4984 // general gap le 4985 done = hci_run_general_gap_le(); 4986 if (done) return; 4987 #endif 4988 4989 // send pending HCI commands 4990 done = hci_run_general_pending_commands(); 4991 if (done) return; 4992 4993 // stack state sub statemachines 4994 hci_connection_t * connection; 4995 switch (hci_stack->state){ 4996 case HCI_STATE_INITIALIZING: 4997 hci_initializing_run(); 4998 break; 4999 5000 case HCI_STATE_HALTING: 5001 5002 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5003 switch (hci_stack->substate){ 5004 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5005 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5006 5007 #ifdef ENABLE_BLE 5008 #ifdef ENABLE_LE_CENTRAL 5009 // free whitelist entries 5010 { 5011 btstack_linked_list_iterator_t lit; 5012 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 5013 while (btstack_linked_list_iterator_has_next(&lit)){ 5014 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5015 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5016 btstack_memory_whitelist_entry_free(entry); 5017 } 5018 } 5019 #endif 5020 #endif 5021 // close all open connections 5022 connection = (hci_connection_t *) hci_stack->connections; 5023 if (connection){ 5024 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5025 if (!hci_can_send_command_packet_now()) return; 5026 5027 // check state 5028 if (connection->state == SENT_DISCONNECT) return; 5029 connection->state = SENT_DISCONNECT; 5030 5031 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5032 5033 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5034 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5035 5036 // ... which would be ignored anyway as we shutdown (free) the connection now 5037 hci_shutdown_connection(connection); 5038 5039 // finally, send the disconnect command 5040 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5041 return; 5042 } 5043 5044 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5045 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5046 log_info("HCI_STATE_HALTING: wait 50 ms"); 5047 hci_stack->substate = HCI_HALTING_W4_TIMER; 5048 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5049 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5050 btstack_run_loop_add_timer(&hci_stack->timeout); 5051 break; 5052 } 5053 5054 /* fall through */ 5055 5056 case HCI_HALTING_CLOSE: 5057 log_info("HCI_STATE_HALTING, calling off"); 5058 5059 // switch mode 5060 hci_power_control_off(); 5061 5062 log_info("HCI_STATE_HALTING, emitting state"); 5063 hci_emit_state(); 5064 log_info("HCI_STATE_HALTING, done"); 5065 break; 5066 5067 case HCI_HALTING_W4_TIMER: 5068 // keep waiting 5069 5070 break; 5071 default: 5072 break; 5073 } 5074 5075 break; 5076 5077 case HCI_STATE_FALLING_ASLEEP: 5078 switch(hci_stack->substate) { 5079 case HCI_FALLING_ASLEEP_DISCONNECT: 5080 log_info("HCI_STATE_FALLING_ASLEEP"); 5081 // close all open connections 5082 connection = (hci_connection_t *) hci_stack->connections; 5083 if (connection){ 5084 5085 // send disconnect 5086 if (!hci_can_send_command_packet_now()) return; 5087 5088 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5089 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5090 5091 // send disconnected event right away - causes higher layer connections to get closed, too. 5092 hci_shutdown_connection(connection); 5093 return; 5094 } 5095 5096 if (hci_classic_supported()){ 5097 // disable page and inquiry scan 5098 if (!hci_can_send_command_packet_now()) return; 5099 5100 log_info("HCI_STATE_HALTING, disabling inq scans"); 5101 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5102 5103 // continue in next sub state 5104 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5105 break; 5106 } 5107 5108 /* fall through */ 5109 5110 case HCI_FALLING_ASLEEP_COMPLETE: 5111 log_info("HCI_STATE_HALTING, calling sleep"); 5112 // switch mode 5113 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5114 hci_emit_state(); 5115 break; 5116 5117 default: 5118 break; 5119 } 5120 break; 5121 5122 default: 5123 break; 5124 } 5125 } 5126 5127 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5128 // house-keeping 5129 5130 #ifdef ENABLE_CLASSIC 5131 bd_addr_t addr; 5132 hci_connection_t * conn; 5133 #endif 5134 #ifdef ENABLE_LE_CENTRAL 5135 uint8_t initiator_filter_policy; 5136 #endif 5137 5138 uint16_t opcode = little_endian_read_16(packet, 0); 5139 switch (opcode) { 5140 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5141 hci_stack->loopback_mode = packet[3]; 5142 break; 5143 5144 #ifdef ENABLE_CLASSIC 5145 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5146 reverse_bd_addr(&packet[3], addr); 5147 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5148 5149 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5150 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5151 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5152 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5153 } 5154 5155 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5156 if (!conn) { 5157 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5158 if (!conn) { 5159 // notify client that alloc failed 5160 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5161 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5162 } 5163 conn->state = SEND_CREATE_CONNECTION; 5164 conn->role = HCI_ROLE_MASTER; 5165 } 5166 5167 conn->con_handle = HCI_CON_HANDLE_INVALID; 5168 conn->role = HCI_ROLE_INVALID; 5169 5170 log_info("conn state %u", conn->state); 5171 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5172 switch (conn->state) { 5173 // if connection active exists 5174 case OPEN: 5175 // and OPEN, emit connection complete command 5176 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5177 // packet not sent to controller 5178 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5179 case RECEIVED_DISCONNECTION_COMPLETE: 5180 // create connection triggered in disconnect complete event, let's do it now 5181 break; 5182 case SEND_CREATE_CONNECTION: 5183 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5184 break; 5185 default: 5186 // otherwise, just ignore as it is already in the open process 5187 // packet not sent to controller 5188 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5189 } 5190 conn->state = SENT_CREATE_CONNECTION; 5191 5192 // track outgoing connection 5193 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5194 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5195 break; 5196 5197 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5198 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5199 // setup_synchronous_connection? Voice setting at offset 22 5200 // TODO: compare to current setting if sco connection already active 5201 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5202 break; 5203 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5204 // accept_synchronous_connection? Voice setting at offset 18 5205 // TODO: compare to current setting if sco connection already active 5206 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5207 break; 5208 #endif 5209 #endif 5210 5211 #ifdef ENABLE_BLE 5212 #ifdef ENABLE_LE_CENTRAL 5213 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5214 // white list used? 5215 initiator_filter_policy = packet[7]; 5216 switch (initiator_filter_policy) { 5217 case 0: 5218 // whitelist not used 5219 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5220 break; 5221 case 1: 5222 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5223 break; 5224 default: 5225 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5226 break; 5227 } 5228 // track outgoing connection 5229 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5230 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5231 break; 5232 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5233 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5234 break; 5235 #endif 5236 #endif 5237 default: 5238 break; 5239 } 5240 5241 hci_stack->num_cmd_packets--; 5242 5243 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5244 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5245 if (err != 0){ 5246 return ERROR_CODE_HARDWARE_FAILURE; 5247 } 5248 return ERROR_CODE_SUCCESS; 5249 } 5250 5251 // disconnect because of security block 5252 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5253 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5254 if (!connection) return; 5255 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5256 } 5257 5258 5259 // Configure Secure Simple Pairing 5260 5261 #ifdef ENABLE_CLASSIC 5262 5263 // enable will enable SSP during init 5264 void gap_ssp_set_enable(int enable){ 5265 hci_stack->ssp_enable = enable; 5266 } 5267 5268 static int hci_local_ssp_activated(void){ 5269 return gap_ssp_supported() && hci_stack->ssp_enable; 5270 } 5271 5272 // if set, BTstack will respond to io capability request using authentication requirement 5273 void gap_ssp_set_io_capability(int io_capability){ 5274 hci_stack->ssp_io_capability = io_capability; 5275 } 5276 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5277 hci_stack->ssp_authentication_requirement = authentication_requirement; 5278 } 5279 5280 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5281 void gap_ssp_set_auto_accept(int auto_accept){ 5282 hci_stack->ssp_auto_accept = auto_accept; 5283 } 5284 5285 void gap_secure_connections_enable(bool enable){ 5286 hci_stack->secure_connections_enable = enable; 5287 } 5288 5289 #endif 5290 5291 // va_list part of hci_send_cmd 5292 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5293 if (!hci_can_send_command_packet_now()){ 5294 log_error("hci_send_cmd called but cannot send packet now"); 5295 return ERROR_CODE_COMMAND_DISALLOWED; 5296 } 5297 5298 // for HCI INITIALIZATION 5299 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5300 hci_stack->last_cmd_opcode = cmd->opcode; 5301 5302 hci_reserve_packet_buffer(); 5303 uint8_t * packet = hci_stack->hci_packet_buffer; 5304 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5305 uint8_t status = hci_send_cmd_packet(packet, size); 5306 5307 // release packet buffer on error or for synchronous transport implementations 5308 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5309 hci_release_packet_buffer(); 5310 hci_emit_transport_packet_sent(); 5311 } 5312 5313 return status; 5314 } 5315 5316 /** 5317 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5318 */ 5319 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5320 va_list argptr; 5321 va_start(argptr, cmd); 5322 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5323 va_end(argptr); 5324 return status; 5325 } 5326 5327 // Create various non-HCI events. 5328 // TODO: generalize, use table similar to hci_create_command 5329 5330 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5331 // dump packet 5332 if (dump) { 5333 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5334 } 5335 5336 // dispatch to all event handlers 5337 btstack_linked_list_iterator_t it; 5338 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5339 while (btstack_linked_list_iterator_has_next(&it)){ 5340 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5341 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5342 } 5343 } 5344 5345 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5346 if (!hci_stack->acl_packet_handler) return; 5347 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5348 } 5349 5350 #ifdef ENABLE_CLASSIC 5351 static void hci_notify_if_sco_can_send_now(void){ 5352 // notify SCO sender if waiting 5353 if (!hci_stack->sco_waiting_for_can_send_now) return; 5354 if (hci_can_send_sco_packet_now()){ 5355 hci_stack->sco_waiting_for_can_send_now = 0; 5356 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5357 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5358 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5359 } 5360 } 5361 5362 // parsing end emitting has been merged to reduce code size 5363 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5364 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5365 5366 uint8_t * eir_data; 5367 ad_context_t context; 5368 const uint8_t * name; 5369 uint8_t name_len; 5370 5371 if (size < 3) return; 5372 5373 int event_type = hci_event_packet_get_type(packet); 5374 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5375 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5376 5377 switch (event_type){ 5378 case HCI_EVENT_INQUIRY_RESULT: 5379 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5380 if (size != (3 + (num_responses * 14))) return; 5381 break; 5382 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5383 if (size != 257) return; 5384 if (num_responses != 1) return; 5385 break; 5386 default: 5387 return; 5388 } 5389 5390 // event[1] is set at the end 5391 int i; 5392 for (i=0; i<num_responses;i++){ 5393 memset(event, 0, sizeof(event)); 5394 event[0] = GAP_EVENT_INQUIRY_RESULT; 5395 uint8_t event_size = 27; // if name is not set by EIR 5396 5397 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5398 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5399 (void)memcpy(&event[9], 5400 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5401 3); // class of device 5402 (void)memcpy(&event[12], 5403 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5404 2); // clock offset 5405 5406 switch (event_type){ 5407 case HCI_EVENT_INQUIRY_RESULT: 5408 // 14,15,16,17 = 0, size 18 5409 break; 5410 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5411 event[14] = 1; 5412 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5413 // 16,17 = 0, size 18 5414 break; 5415 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5416 event[14] = 1; 5417 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5418 // EIR packets only contain a single inquiry response 5419 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5420 name = NULL; 5421 // Iterate over EIR data 5422 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5423 uint8_t data_type = ad_iterator_get_data_type(&context); 5424 uint8_t data_size = ad_iterator_get_data_len(&context); 5425 const uint8_t * data = ad_iterator_get_data(&context); 5426 // Prefer Complete Local Name over Shortened Local Name 5427 switch (data_type){ 5428 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5429 if (name) continue; 5430 /* fall through */ 5431 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5432 name = data; 5433 name_len = data_size; 5434 break; 5435 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5436 if (data_size != 8) break; 5437 event[16] = 1; 5438 memcpy(&event[17], data, 8); 5439 break; 5440 default: 5441 break; 5442 } 5443 } 5444 if (name){ 5445 event[25] = 1; 5446 // truncate name if needed 5447 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5448 event[26] = len; 5449 (void)memcpy(&event[27], name, len); 5450 event_size += len; 5451 } 5452 break; 5453 default: 5454 return; 5455 } 5456 event[1] = event_size - 2; 5457 hci_emit_event(event, event_size, 1); 5458 } 5459 } 5460 #endif 5461 5462 void hci_emit_state(void){ 5463 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5464 uint8_t event[3]; 5465 event[0] = BTSTACK_EVENT_STATE; 5466 event[1] = sizeof(event) - 2u; 5467 event[2] = hci_stack->state; 5468 hci_emit_event(event, sizeof(event), 1); 5469 } 5470 5471 #ifdef ENABLE_CLASSIC 5472 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5473 uint8_t event[13]; 5474 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5475 event[1] = sizeof(event) - 2; 5476 event[2] = status; 5477 little_endian_store_16(event, 3, con_handle); 5478 reverse_bd_addr(address, &event[5]); 5479 event[11] = 1; // ACL connection 5480 event[12] = 0; // encryption disabled 5481 hci_emit_event(event, sizeof(event), 1); 5482 } 5483 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5484 if (disable_l2cap_timeouts) return; 5485 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5486 uint8_t event[4]; 5487 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5488 event[1] = sizeof(event) - 2; 5489 little_endian_store_16(event, 2, conn->con_handle); 5490 hci_emit_event(event, sizeof(event), 1); 5491 } 5492 #endif 5493 5494 #ifdef ENABLE_BLE 5495 #ifdef ENABLE_LE_CENTRAL 5496 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){ 5497 uint8_t event[21]; 5498 event[0] = HCI_EVENT_LE_META; 5499 event[1] = sizeof(event) - 2u; 5500 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5501 event[3] = status; 5502 little_endian_store_16(event, 4, con_handle); 5503 event[6] = 0; // TODO: role 5504 event[7] = address_type; 5505 reverse_bd_addr(address, &event[8]); 5506 little_endian_store_16(event, 14, 0); // interval 5507 little_endian_store_16(event, 16, 0); // latency 5508 little_endian_store_16(event, 18, 0); // supervision timeout 5509 event[20] = 0; // master clock accuracy 5510 hci_emit_event(event, sizeof(event), 1); 5511 } 5512 #endif 5513 #endif 5514 5515 static void hci_emit_transport_packet_sent(void){ 5516 // notify upper stack that it might be possible to send again 5517 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5518 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5519 } 5520 5521 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5522 uint8_t event[6]; 5523 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5524 event[1] = sizeof(event) - 2u; 5525 event[2] = 0; // status = OK 5526 little_endian_store_16(event, 3, con_handle); 5527 event[5] = reason; 5528 hci_emit_event(event, sizeof(event), 1); 5529 } 5530 5531 static void hci_emit_nr_connections_changed(void){ 5532 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5533 uint8_t event[3]; 5534 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5535 event[1] = sizeof(event) - 2u; 5536 event[2] = nr_hci_connections(); 5537 hci_emit_event(event, sizeof(event), 1); 5538 } 5539 5540 static void hci_emit_hci_open_failed(void){ 5541 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5542 uint8_t event[2]; 5543 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5544 event[1] = sizeof(event) - 2u; 5545 hci_emit_event(event, sizeof(event), 1); 5546 } 5547 5548 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5549 log_info("hci_emit_dedicated_bonding_result %u ", status); 5550 uint8_t event[9]; 5551 int pos = 0; 5552 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5553 event[pos++] = sizeof(event) - 2u; 5554 event[pos++] = status; 5555 reverse_bd_addr(address, &event[pos]); 5556 hci_emit_event(event, sizeof(event), 1); 5557 } 5558 5559 5560 #ifdef ENABLE_CLASSIC 5561 5562 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5563 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5564 uint8_t event[5]; 5565 int pos = 0; 5566 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5567 event[pos++] = sizeof(event) - 2; 5568 little_endian_store_16(event, 2, con_handle); 5569 pos += 2; 5570 event[pos++] = level; 5571 hci_emit_event(event, sizeof(event), 1); 5572 } 5573 5574 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5575 if (!connection) return LEVEL_0; 5576 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5577 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5578 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5579 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5580 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5581 // LEVEL 4 always requires 128 bit encrytion key size 5582 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5583 security_level = LEVEL_3; 5584 } 5585 return security_level; 5586 } 5587 5588 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5589 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5590 uint8_t event[3]; 5591 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5592 event[1] = sizeof(event) - 2; 5593 event[2] = enabled; 5594 hci_emit_event(event, sizeof(event), 1); 5595 } 5596 5597 // query if remote side supports eSCO 5598 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5599 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5600 if (!connection) return false; 5601 return (connection->remote_supported_features[0] & 1) != 0; 5602 } 5603 5604 static bool hci_ssp_supported(hci_connection_t * connection){ 5605 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5606 return (connection->bonding_flags & mask) == mask; 5607 } 5608 5609 // query if remote side supports SSP 5610 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5611 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5612 if (!connection) return false; 5613 return hci_ssp_supported(connection) ? 1 : 0; 5614 } 5615 5616 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5617 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5618 } 5619 5620 /** 5621 * Check if remote supported features query has completed 5622 */ 5623 bool hci_remote_features_available(hci_con_handle_t handle){ 5624 hci_connection_t * connection = hci_connection_for_handle(handle); 5625 if (!connection) return false; 5626 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5627 } 5628 5629 /** 5630 * Trigger remote supported features query 5631 */ 5632 void hci_remote_features_query(hci_con_handle_t con_handle){ 5633 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5634 if (!connection) return; 5635 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) != 0) return; 5636 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5637 hci_run(); 5638 } 5639 5640 // GAP API 5641 /** 5642 * @bbrief enable/disable bonding. default is enabled 5643 * @praram enabled 5644 */ 5645 void gap_set_bondable_mode(int enable){ 5646 hci_stack->bondable = enable ? 1 : 0; 5647 } 5648 /** 5649 * @brief Get bondable mode. 5650 * @return 1 if bondable 5651 */ 5652 int gap_get_bondable_mode(void){ 5653 return hci_stack->bondable; 5654 } 5655 5656 /** 5657 * @brief map link keys to security levels 5658 */ 5659 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5660 switch (link_key_type){ 5661 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5662 return LEVEL_4; 5663 case COMBINATION_KEY: 5664 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5665 return LEVEL_3; 5666 default: 5667 return LEVEL_2; 5668 } 5669 } 5670 5671 /** 5672 * @brief map link keys to secure connection yes/no 5673 */ 5674 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5675 switch (link_key_type){ 5676 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5677 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5678 return 1; 5679 default: 5680 return 0; 5681 } 5682 } 5683 5684 /** 5685 * @brief map link keys to authenticated 5686 */ 5687 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5688 switch (link_key_type){ 5689 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5690 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5691 return 1; 5692 default: 5693 return 0; 5694 } 5695 } 5696 5697 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5698 log_info("gap_mitm_protection_required_for_security_level %u", level); 5699 return level > LEVEL_2; 5700 } 5701 5702 /** 5703 * @brief get current security level 5704 */ 5705 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5706 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5707 if (!connection) return LEVEL_0; 5708 return gap_security_level_for_connection(connection); 5709 } 5710 5711 /** 5712 * @brief request connection to device to 5713 * @result GAP_AUTHENTICATION_RESULT 5714 */ 5715 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5716 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5717 if (!connection){ 5718 hci_emit_security_level(con_handle, LEVEL_0); 5719 return; 5720 } 5721 5722 btstack_assert(hci_is_le_connection(connection) == false); 5723 5724 // 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) 5725 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5726 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5727 requested_level = LEVEL_4; 5728 } 5729 5730 gap_security_level_t current_level = gap_security_level(con_handle); 5731 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5732 requested_level, connection->requested_security_level, current_level); 5733 5734 // authentication active if authentication request was sent or planned level > 0 5735 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5736 if (authentication_active){ 5737 // authentication already active 5738 if (connection->requested_security_level < requested_level){ 5739 // increase requested level as new level is higher 5740 // TODO: handle re-authentication when done 5741 connection->requested_security_level = requested_level; 5742 } 5743 } else { 5744 // no request active, notify if security sufficient 5745 if (requested_level <= current_level){ 5746 hci_emit_security_level(con_handle, current_level); 5747 return; 5748 } 5749 5750 // store request 5751 connection->requested_security_level = requested_level; 5752 5753 // request remote features if not already active 5754 hci_remote_features_query(con_handle); 5755 5756 // start to authenticate connection 5757 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5758 hci_run(); 5759 } 5760 } 5761 5762 /** 5763 * @brief start dedicated bonding with device. disconnect after bonding 5764 * @param device 5765 * @param request MITM protection 5766 * @result GAP_DEDICATED_BONDING_COMPLETE 5767 */ 5768 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5769 5770 // create connection state machine 5771 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5772 5773 if (!connection){ 5774 return BTSTACK_MEMORY_ALLOC_FAILED; 5775 } 5776 5777 // delete linkn key 5778 gap_drop_link_key_for_bd_addr(device); 5779 5780 // configure LEVEL_2/3, dedicated bonding 5781 connection->state = SEND_CREATE_CONNECTION; 5782 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5783 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5784 connection->bonding_flags = BONDING_DEDICATED; 5785 5786 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5787 5788 // handle: connnection failure (connection complete != ok) 5789 // handle: authentication failure 5790 // handle: disconnect on done 5791 5792 hci_run(); 5793 5794 return 0; 5795 } 5796 5797 void gap_set_local_name(const char * local_name){ 5798 hci_stack->local_name = local_name; 5799 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5800 // also update EIR if not set by user 5801 if (hci_stack->eir_data == NULL){ 5802 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5803 } 5804 hci_run(); 5805 } 5806 #endif 5807 5808 5809 #ifdef ENABLE_BLE 5810 5811 #ifdef ENABLE_LE_CENTRAL 5812 void gap_start_scan(void){ 5813 hci_stack->le_scanning_enabled = true; 5814 hci_run(); 5815 } 5816 5817 void gap_stop_scan(void){ 5818 hci_stack->le_scanning_enabled = false; 5819 hci_run(); 5820 } 5821 5822 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5823 hci_stack->le_scan_type = scan_type; 5824 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5825 hci_stack->le_scan_interval = scan_interval; 5826 hci_stack->le_scan_window = scan_window; 5827 hci_stack->le_scanning_param_update = true; 5828 hci_run(); 5829 } 5830 5831 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5832 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5833 } 5834 5835 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5836 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5837 if (!conn){ 5838 // disallow if le connection is already outgoing 5839 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5840 log_error("le connection already active"); 5841 return ERROR_CODE_COMMAND_DISALLOWED; 5842 } 5843 5844 log_info("gap_connect: no connection exists yet, creating context"); 5845 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5846 if (!conn){ 5847 // notify client that alloc failed 5848 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5849 log_info("gap_connect: failed to alloc hci_connection_t"); 5850 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5851 } 5852 5853 // set le connecting state 5854 if (hci_is_le_connection_type(addr_type)){ 5855 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5856 } 5857 5858 conn->state = SEND_CREATE_CONNECTION; 5859 log_info("gap_connect: send create connection next"); 5860 hci_run(); 5861 return ERROR_CODE_SUCCESS; 5862 } 5863 5864 if (!hci_is_le_connection(conn) || 5865 (conn->state == SEND_CREATE_CONNECTION) || 5866 (conn->state == SENT_CREATE_CONNECTION)) { 5867 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5868 log_error("gap_connect: classic connection or connect is already being created"); 5869 return GATT_CLIENT_IN_WRONG_STATE; 5870 } 5871 5872 // check if connection was just disconnected 5873 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5874 log_info("gap_connect: send create connection (again)"); 5875 conn->state = SEND_CREATE_CONNECTION; 5876 hci_run(); 5877 return ERROR_CODE_SUCCESS; 5878 } 5879 5880 log_info("gap_connect: context exists with state %u", conn->state); 5881 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5882 hci_run(); 5883 return ERROR_CODE_SUCCESS; 5884 } 5885 5886 // @assumption: only a single outgoing LE Connection exists 5887 static hci_connection_t * gap_get_outgoing_connection(void){ 5888 btstack_linked_item_t *it; 5889 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5890 hci_connection_t * conn = (hci_connection_t *) it; 5891 if (!hci_is_le_connection(conn)) continue; 5892 switch (conn->state){ 5893 case SEND_CREATE_CONNECTION: 5894 case SENT_CREATE_CONNECTION: 5895 case SENT_CANCEL_CONNECTION: 5896 return conn; 5897 default: 5898 break; 5899 }; 5900 } 5901 return NULL; 5902 } 5903 5904 uint8_t gap_connect_cancel(void){ 5905 hci_connection_t * conn = gap_get_outgoing_connection(); 5906 if (!conn) return 0; 5907 switch (conn->state){ 5908 case SEND_CREATE_CONNECTION: 5909 // skip sending create connection and emit event instead 5910 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5911 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5912 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5913 btstack_memory_hci_connection_free( conn ); 5914 break; 5915 case SENT_CREATE_CONNECTION: 5916 // request to send cancel connection 5917 conn->state = SEND_CANCEL_CONNECTION; 5918 hci_run(); 5919 break; 5920 default: 5921 break; 5922 } 5923 return 0; 5924 } 5925 #endif 5926 5927 #ifdef ENABLE_LE_CENTRAL 5928 /** 5929 * @brief Set connection parameters for outgoing connections 5930 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5931 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5932 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5933 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5934 * @param conn_latency, default: 4 5935 * @param supervision_timeout (unit: 10ms), default: 720 ms 5936 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5937 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5938 */ 5939 5940 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5941 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5942 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5943 hci_stack->le_connection_scan_interval = conn_scan_interval; 5944 hci_stack->le_connection_scan_window = conn_scan_window; 5945 hci_stack->le_connection_interval_min = conn_interval_min; 5946 hci_stack->le_connection_interval_max = conn_interval_max; 5947 hci_stack->le_connection_latency = conn_latency; 5948 hci_stack->le_supervision_timeout = supervision_timeout; 5949 hci_stack->le_minimum_ce_length = min_ce_length; 5950 hci_stack->le_maximum_ce_length = max_ce_length; 5951 } 5952 #endif 5953 5954 /** 5955 * @brief Updates the connection parameters for a given LE connection 5956 * @param handle 5957 * @param conn_interval_min (unit: 1.25ms) 5958 * @param conn_interval_max (unit: 1.25ms) 5959 * @param conn_latency 5960 * @param supervision_timeout (unit: 10ms) 5961 * @returns 0 if ok 5962 */ 5963 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5964 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5965 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5966 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5967 connection->le_conn_interval_min = conn_interval_min; 5968 connection->le_conn_interval_max = conn_interval_max; 5969 connection->le_conn_latency = conn_latency; 5970 connection->le_supervision_timeout = supervision_timeout; 5971 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5972 hci_run(); 5973 return 0; 5974 } 5975 5976 /** 5977 * @brief Request an update of the connection parameter for a given LE connection 5978 * @param handle 5979 * @param conn_interval_min (unit: 1.25ms) 5980 * @param conn_interval_max (unit: 1.25ms) 5981 * @param conn_latency 5982 * @param supervision_timeout (unit: 10ms) 5983 * @returns 0 if ok 5984 */ 5985 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5986 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5987 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5988 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5989 connection->le_conn_interval_min = conn_interval_min; 5990 connection->le_conn_interval_max = conn_interval_max; 5991 connection->le_conn_latency = conn_latency; 5992 connection->le_supervision_timeout = supervision_timeout; 5993 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5994 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5995 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5996 return 0; 5997 } 5998 5999 #ifdef ENABLE_LE_PERIPHERAL 6000 6001 /** 6002 * @brief Set Advertisement Data 6003 * @param advertising_data_length 6004 * @param advertising_data (max 31 octets) 6005 * @note data is not copied, pointer has to stay valid 6006 */ 6007 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6008 hci_stack->le_advertisements_data_len = advertising_data_length; 6009 hci_stack->le_advertisements_data = advertising_data; 6010 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6011 hci_run(); 6012 } 6013 6014 /** 6015 * @brief Set Scan Response Data 6016 * @param advertising_data_length 6017 * @param advertising_data (max 31 octets) 6018 * @note data is not copied, pointer has to stay valid 6019 */ 6020 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6021 hci_stack->le_scan_response_data_len = scan_response_data_length; 6022 hci_stack->le_scan_response_data = scan_response_data; 6023 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6024 hci_run(); 6025 } 6026 6027 /** 6028 * @brief Set Advertisement Parameters 6029 * @param adv_int_min 6030 * @param adv_int_max 6031 * @param adv_type 6032 * @param direct_address_type 6033 * @param direct_address 6034 * @param channel_map 6035 * @param filter_policy 6036 * 6037 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6038 */ 6039 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6040 uint8_t direct_address_typ, bd_addr_t direct_address, 6041 uint8_t channel_map, uint8_t filter_policy) { 6042 6043 hci_stack->le_advertisements_interval_min = adv_int_min; 6044 hci_stack->le_advertisements_interval_max = adv_int_max; 6045 hci_stack->le_advertisements_type = adv_type; 6046 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6047 hci_stack->le_advertisements_channel_map = channel_map; 6048 hci_stack->le_advertisements_filter_policy = filter_policy; 6049 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6050 6); 6051 6052 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6053 hci_run(); 6054 } 6055 6056 /** 6057 * @brief Enable/Disable Advertisements 6058 * @param enabled 6059 */ 6060 void gap_advertisements_enable(int enabled){ 6061 hci_stack->le_advertisements_enabled = enabled != 0; 6062 hci_update_advertisements_enabled_for_current_roles(); 6063 hci_run(); 6064 } 6065 6066 #endif 6067 6068 void hci_le_set_own_address_type(uint8_t own_address_type){ 6069 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6070 if (own_address_type == hci_stack->le_own_addr_type) return; 6071 hci_stack->le_own_addr_type = own_address_type; 6072 6073 #ifdef ENABLE_LE_PERIPHERAL 6074 // update advertisement parameters, too 6075 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6076 hci_run(); 6077 #endif 6078 #ifdef ENABLE_LE_CENTRAL 6079 // note: we don't update scan parameters or modify ongoing connection attempts 6080 #endif 6081 } 6082 6083 void hci_le_random_address_set(const bd_addr_t random_address){ 6084 memcpy(hci_stack->le_random_address, random_address, 6); 6085 hci_stack->le_random_address_set = true; 6086 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6087 hci_run(); 6088 } 6089 6090 #endif 6091 6092 uint8_t gap_disconnect(hci_con_handle_t handle){ 6093 hci_connection_t * conn = hci_connection_for_handle(handle); 6094 if (!conn){ 6095 hci_emit_disconnection_complete(handle, 0); 6096 return 0; 6097 } 6098 // ignore if already disconnected 6099 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6100 return 0; 6101 } 6102 conn->state = SEND_DISCONNECT; 6103 hci_run(); 6104 return 0; 6105 } 6106 6107 int gap_read_rssi(hci_con_handle_t con_handle){ 6108 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6109 if (hci_connection == NULL) return 0; 6110 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6111 hci_run(); 6112 return 1; 6113 } 6114 6115 /** 6116 * @brief Get connection type 6117 * @param con_handle 6118 * @result connection_type 6119 */ 6120 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6121 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6122 if (!conn) return GAP_CONNECTION_INVALID; 6123 switch (conn->address_type){ 6124 case BD_ADDR_TYPE_LE_PUBLIC: 6125 case BD_ADDR_TYPE_LE_RANDOM: 6126 return GAP_CONNECTION_LE; 6127 case BD_ADDR_TYPE_SCO: 6128 return GAP_CONNECTION_SCO; 6129 case BD_ADDR_TYPE_ACL: 6130 return GAP_CONNECTION_ACL; 6131 default: 6132 return GAP_CONNECTION_INVALID; 6133 } 6134 } 6135 6136 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6137 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6138 if (!conn) return HCI_ROLE_INVALID; 6139 return (hci_role_t) conn->role; 6140 } 6141 6142 6143 #ifdef ENABLE_CLASSIC 6144 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6145 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6146 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6147 conn->request_role = role; 6148 hci_run(); 6149 return ERROR_CODE_SUCCESS; 6150 } 6151 #endif 6152 6153 #ifdef ENABLE_BLE 6154 6155 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){ 6156 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6157 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6158 6159 conn->le_phy_update_all_phys = all_phys; 6160 conn->le_phy_update_tx_phys = tx_phys; 6161 conn->le_phy_update_rx_phys = rx_phys; 6162 conn->le_phy_update_phy_options = phy_options; 6163 6164 hci_run(); 6165 6166 return 0; 6167 } 6168 6169 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6170 // check if already in list 6171 btstack_linked_list_iterator_t it; 6172 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6173 while (btstack_linked_list_iterator_has_next(&it)) { 6174 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6175 if (entry->address_type != address_type) { 6176 continue; 6177 } 6178 if (memcmp(entry->address, address, 6) != 0) { 6179 continue; 6180 } 6181 // disallow if already scheduled to add 6182 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6183 return ERROR_CODE_COMMAND_DISALLOWED; 6184 } 6185 // still on controller, but scheduled to remove -> re-add 6186 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6187 return ERROR_CODE_SUCCESS; 6188 } 6189 // alloc and add to list 6190 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6191 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6192 entry->address_type = address_type; 6193 (void)memcpy(entry->address, address, 6); 6194 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6195 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6196 return ERROR_CODE_SUCCESS; 6197 } 6198 6199 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6200 btstack_linked_list_iterator_t it; 6201 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6202 while (btstack_linked_list_iterator_has_next(&it)){ 6203 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6204 if (entry->address_type != address_type) { 6205 continue; 6206 } 6207 if (memcmp(entry->address, address, 6) != 0) { 6208 continue; 6209 } 6210 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6211 // remove from controller if already present 6212 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6213 } else { 6214 // directly remove entry from whitelist 6215 btstack_linked_list_iterator_remove(&it); 6216 btstack_memory_whitelist_entry_free(entry); 6217 } 6218 return ERROR_CODE_SUCCESS; 6219 } 6220 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6221 } 6222 6223 static void hci_whitelist_clear(void){ 6224 btstack_linked_list_iterator_t it; 6225 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6226 while (btstack_linked_list_iterator_has_next(&it)){ 6227 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6228 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6229 // remove from controller if already present 6230 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6231 continue; 6232 } 6233 // directly remove entry from whitelist 6234 btstack_linked_list_iterator_remove(&it); 6235 btstack_memory_whitelist_entry_free(entry); 6236 } 6237 } 6238 6239 /** 6240 * @brief Clear Whitelist 6241 * @returns 0 if ok 6242 */ 6243 uint8_t gap_whitelist_clear(void){ 6244 hci_whitelist_clear(); 6245 hci_run(); 6246 return ERROR_CODE_SUCCESS; 6247 } 6248 6249 /** 6250 * @brief Add Device to Whitelist 6251 * @param address_typ 6252 * @param address 6253 * @returns 0 if ok 6254 */ 6255 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6256 uint8_t status = hci_whitelist_add(address_type, address); 6257 if (status){ 6258 return status; 6259 } 6260 hci_run(); 6261 return ERROR_CODE_SUCCESS; 6262 } 6263 6264 /** 6265 * @brief Remove Device from Whitelist 6266 * @param address_typ 6267 * @param address 6268 * @returns 0 if ok 6269 */ 6270 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6271 uint8_t status = hci_whitelist_remove(address_type, address); 6272 if (status){ 6273 return status; 6274 } 6275 hci_run(); 6276 return ERROR_CODE_SUCCESS; 6277 } 6278 6279 #ifdef ENABLE_LE_CENTRAL 6280 /** 6281 * @brief Connect with Whitelist 6282 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6283 * @returns - if ok 6284 */ 6285 uint8_t gap_connect_with_whitelist(void){ 6286 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6287 return ERROR_CODE_COMMAND_DISALLOWED; 6288 } 6289 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6290 hci_run(); 6291 return ERROR_CODE_SUCCESS; 6292 } 6293 6294 /** 6295 * @brief Auto Connection Establishment - Start Connecting to device 6296 * @param address_typ 6297 * @param address 6298 * @returns 0 if ok 6299 */ 6300 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6301 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6302 return ERROR_CODE_COMMAND_DISALLOWED; 6303 } 6304 6305 uint8_t status = hci_whitelist_add(address_type, address); 6306 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6307 return status; 6308 } 6309 6310 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6311 6312 hci_run(); 6313 return ERROR_CODE_SUCCESS; 6314 } 6315 6316 /** 6317 * @brief Auto Connection Establishment - Stop Connecting to device 6318 * @param address_typ 6319 * @param address 6320 * @returns 0 if ok 6321 */ 6322 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6323 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6324 return ERROR_CODE_COMMAND_DISALLOWED; 6325 } 6326 6327 hci_whitelist_remove(address_type, address); 6328 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6329 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6330 } 6331 hci_run(); 6332 return 0; 6333 } 6334 6335 /** 6336 * @brief Auto Connection Establishment - Stop everything 6337 * @note Convenience function to stop all active auto connection attempts 6338 */ 6339 uint8_t gap_auto_connection_stop_all(void){ 6340 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6341 return ERROR_CODE_COMMAND_DISALLOWED; 6342 } 6343 hci_whitelist_clear(); 6344 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6345 hci_run(); 6346 return ERROR_CODE_SUCCESS; 6347 } 6348 6349 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6350 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6351 if (!conn) return 0; 6352 return conn->le_connection_interval; 6353 } 6354 #endif 6355 #endif 6356 6357 #ifdef ENABLE_CLASSIC 6358 /** 6359 * @brief Set Extended Inquiry Response data 6360 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6361 * @note has to be done before stack starts up 6362 */ 6363 void gap_set_extended_inquiry_response(const uint8_t * data){ 6364 hci_stack->eir_data = data; 6365 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6366 hci_run(); 6367 } 6368 6369 /** 6370 * @brief Start GAP Classic Inquiry 6371 * @param duration in 1.28s units 6372 * @return 0 if ok 6373 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6374 */ 6375 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6376 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6377 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6378 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6379 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6380 } 6381 hci_stack->inquiry_state = duration_in_1280ms_units; 6382 hci_run(); 6383 return 0; 6384 } 6385 6386 /** 6387 * @brief Stop GAP Classic Inquiry 6388 * @returns 0 if ok 6389 */ 6390 int gap_inquiry_stop(void){ 6391 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6392 // emit inquiry complete event, before it even started 6393 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6394 hci_emit_event(event, sizeof(event), 1); 6395 return 0; 6396 } 6397 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6398 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6399 hci_run(); 6400 return 0; 6401 } 6402 6403 void gap_inquiry_set_lap(uint32_t lap){ 6404 hci_stack->inquiry_lap = lap; 6405 } 6406 6407 void gap_inquiry_set_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6408 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6409 hci_stack->inquiry_scan_window = inquiry_scan_window; 6410 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6411 hci_run(); 6412 } 6413 6414 6415 /** 6416 * @brief Remote Name Request 6417 * @param addr 6418 * @param page_scan_repetition_mode 6419 * @param clock_offset only used when bit 15 is set 6420 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6421 */ 6422 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6423 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6424 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6425 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6426 hci_stack->remote_name_clock_offset = clock_offset; 6427 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6428 hci_run(); 6429 return 0; 6430 } 6431 6432 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6433 hci_stack->gap_pairing_state = state; 6434 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6435 hci_run(); 6436 return 0; 6437 } 6438 6439 /** 6440 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6441 * @param addr 6442 * @param pin_data 6443 * @param pin_len 6444 * @return 0 if ok 6445 */ 6446 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6447 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6448 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6449 hci_stack->gap_pairing_pin_len = pin_len; 6450 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6451 } 6452 6453 /** 6454 * @brief Legacy Pairing Pin Code Response 6455 * @param addr 6456 * @param pin 6457 * @return 0 if ok 6458 */ 6459 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6460 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6461 } 6462 6463 /** 6464 * @brief Abort Legacy Pairing 6465 * @param addr 6466 * @param pin 6467 * @return 0 if ok 6468 */ 6469 int gap_pin_code_negative(bd_addr_t addr){ 6470 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6471 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6472 } 6473 6474 /** 6475 * @brief SSP Passkey Response 6476 * @param addr 6477 * @param passkey 6478 * @return 0 if ok 6479 */ 6480 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6481 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6482 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6483 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6484 } 6485 6486 /** 6487 * @brief Abort SSP Passkey Entry/Pairing 6488 * @param addr 6489 * @param pin 6490 * @return 0 if ok 6491 */ 6492 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6493 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6494 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6495 } 6496 6497 /** 6498 * @brief Accept SSP Numeric Comparison 6499 * @param addr 6500 * @param passkey 6501 * @return 0 if ok 6502 */ 6503 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6504 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6505 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6506 } 6507 6508 /** 6509 * @brief Abort SSP Numeric Comparison/Pairing 6510 * @param addr 6511 * @param pin 6512 * @return 0 if ok 6513 */ 6514 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6515 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6516 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6517 } 6518 6519 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6520 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6521 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6522 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6523 connectionSetAuthenticationFlags(conn, flag); 6524 hci_run(); 6525 return ERROR_CODE_SUCCESS; 6526 } 6527 #endif 6528 6529 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6530 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6531 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6532 } 6533 6534 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6535 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6536 } 6537 #endif 6538 6539 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6540 /** 6541 * @brief Report Remote OOB Data 6542 * @param bd_addr 6543 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6544 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6545 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6546 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6547 */ 6548 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){ 6549 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6550 if (connection == NULL) { 6551 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6552 } 6553 connection->classic_oob_c_192 = c_192; 6554 connection->classic_oob_r_192 = r_192; 6555 6556 // ignore P-256 if not supported by us 6557 if (hci_stack->secure_connections_active){ 6558 connection->classic_oob_c_256 = c_256; 6559 connection->classic_oob_r_256 = r_256; 6560 } 6561 6562 return ERROR_CODE_SUCCESS; 6563 } 6564 /** 6565 * @brief Generate new OOB data 6566 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6567 */ 6568 void gap_ssp_generate_oob_data(void){ 6569 hci_stack->classic_read_local_oob_data = true; 6570 hci_run(); 6571 } 6572 6573 #endif 6574 6575 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6576 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6577 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6578 if (connection == NULL) { 6579 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6580 } 6581 6582 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6583 connection->link_key_type = type; 6584 6585 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6586 } 6587 6588 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6589 /** 6590 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6591 * @param inquiry_mode see bluetooth_defines.h 6592 */ 6593 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6594 hci_stack->inquiry_mode = inquiry_mode; 6595 } 6596 6597 /** 6598 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6599 */ 6600 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6601 hci_stack->sco_voice_setting = voice_setting; 6602 } 6603 6604 /** 6605 * @brief Get SCO Voice Setting 6606 * @return current voice setting 6607 */ 6608 uint16_t hci_get_sco_voice_setting(void){ 6609 return hci_stack->sco_voice_setting; 6610 } 6611 6612 static int hci_have_usb_transport(void){ 6613 if (!hci_stack->hci_transport) return 0; 6614 const char * transport_name = hci_stack->hci_transport->name; 6615 if (!transport_name) return 0; 6616 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6617 } 6618 6619 /** @brief Get SCO packet length for current SCO Voice setting 6620 * @note Using SCO packets of the exact length is required for USB transfer 6621 * @return Length of SCO packets in bytes (not audio frames) 6622 */ 6623 uint16_t hci_get_sco_packet_length(void){ 6624 uint16_t sco_packet_length = 0; 6625 6626 #ifdef ENABLE_SCO_OVER_HCI 6627 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6628 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6629 6630 if (hci_have_usb_transport()){ 6631 // see Core Spec for H2 USB Transfer. 6632 // 3 byte SCO header + 24 bytes per connection 6633 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6634 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6635 } else { 6636 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6637 sco_packet_length = 3 + 60 * multiplier; 6638 // assert that it still fits inside an SCO buffer 6639 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6640 sco_packet_length = 3 + 60; 6641 } 6642 } 6643 #endif 6644 6645 #ifdef HAVE_SCO_TRANSPORT 6646 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6647 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6648 sco_packet_length = 3 + 60 * multiplier; 6649 #endif 6650 return sco_packet_length; 6651 } 6652 6653 /** 6654 * @brief Sets the master/slave policy 6655 * @param policy (0: attempt to become master, 1: let connecting device decide) 6656 */ 6657 void hci_set_master_slave_policy(uint8_t policy){ 6658 hci_stack->master_slave_policy = policy; 6659 } 6660 6661 #endif 6662 6663 HCI_STATE hci_get_state(void){ 6664 return hci_stack->state; 6665 } 6666 6667 #ifdef ENABLE_CLASSIC 6668 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6669 hci_stack->gap_classic_accept_callback = accept_callback; 6670 } 6671 #endif 6672 6673 /** 6674 * @brief Set callback for Bluetooth Hardware Error 6675 */ 6676 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6677 hci_stack->hardware_error_callback = fn; 6678 } 6679 6680 void hci_disconnect_all(void){ 6681 btstack_linked_list_iterator_t it; 6682 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6683 while (btstack_linked_list_iterator_has_next(&it)){ 6684 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6685 if (con->state == SENT_DISCONNECT) continue; 6686 con->state = SEND_DISCONNECT; 6687 } 6688 hci_run(); 6689 } 6690 6691 uint16_t hci_get_manufacturer(void){ 6692 return hci_stack->manufacturer; 6693 } 6694 6695 #ifdef ENABLE_BLE 6696 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6697 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6698 if (!hci_con) return NULL; 6699 return &hci_con->sm_connection; 6700 } 6701 6702 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6703 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6704 #endif 6705 6706 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6707 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6708 if (hci_connection == NULL) return 0; 6709 if (hci_is_le_connection(hci_connection)){ 6710 #ifdef ENABLE_BLE 6711 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6712 if (sm_conn->sm_connection_encrypted) { 6713 return sm_conn->sm_actual_encryption_key_size; 6714 } 6715 #endif 6716 } else { 6717 #ifdef ENABLE_CLASSIC 6718 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6719 return hci_connection->encryption_key_size; 6720 } 6721 #endif 6722 } 6723 return 0; 6724 } 6725 6726 int gap_authenticated(hci_con_handle_t con_handle){ 6727 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6728 if (hci_connection == NULL) return 0; 6729 6730 switch (hci_connection->address_type){ 6731 #ifdef ENABLE_BLE 6732 case BD_ADDR_TYPE_LE_PUBLIC: 6733 case BD_ADDR_TYPE_LE_RANDOM: 6734 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6735 return hci_connection->sm_connection.sm_connection_authenticated; 6736 #endif 6737 #ifdef ENABLE_CLASSIC 6738 case BD_ADDR_TYPE_SCO: 6739 case BD_ADDR_TYPE_ACL: 6740 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6741 #endif 6742 default: 6743 return 0; 6744 } 6745 } 6746 6747 int gap_secure_connection(hci_con_handle_t con_handle){ 6748 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6749 if (hci_connection == NULL) return 0; 6750 6751 switch (hci_connection->address_type){ 6752 #ifdef ENABLE_BLE 6753 case BD_ADDR_TYPE_LE_PUBLIC: 6754 case BD_ADDR_TYPE_LE_RANDOM: 6755 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6756 return hci_connection->sm_connection.sm_connection_sc; 6757 #endif 6758 #ifdef ENABLE_CLASSIC 6759 case BD_ADDR_TYPE_SCO: 6760 case BD_ADDR_TYPE_ACL: 6761 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6762 #endif 6763 default: 6764 return 0; 6765 } 6766 } 6767 6768 bool gap_bonded(hci_con_handle_t con_handle){ 6769 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6770 if (hci_connection == NULL) return 0; 6771 6772 #ifdef ENABLE_CLASSIC 6773 link_key_t link_key; 6774 link_key_type_t link_key_type; 6775 #endif 6776 switch (hci_connection->address_type){ 6777 #ifdef ENABLE_BLE 6778 case BD_ADDR_TYPE_LE_PUBLIC: 6779 case BD_ADDR_TYPE_LE_RANDOM: 6780 return hci_connection->sm_connection.sm_le_db_index >= 0; 6781 #endif 6782 #ifdef ENABLE_CLASSIC 6783 case BD_ADDR_TYPE_SCO: 6784 case BD_ADDR_TYPE_ACL: 6785 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6786 #endif 6787 default: 6788 return false; 6789 } 6790 } 6791 6792 #ifdef ENABLE_BLE 6793 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6794 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6795 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6796 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6797 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6798 return sm_conn->sm_connection_authorization_state; 6799 } 6800 #endif 6801 6802 #ifdef ENABLE_CLASSIC 6803 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){ 6804 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6805 if (!conn) return GAP_CONNECTION_INVALID; 6806 conn->sniff_min_interval = sniff_min_interval; 6807 conn->sniff_max_interval = sniff_max_interval; 6808 conn->sniff_attempt = sniff_attempt; 6809 conn->sniff_timeout = sniff_timeout; 6810 hci_run(); 6811 return 0; 6812 } 6813 6814 /** 6815 * @brief Exit Sniff mode 6816 * @param con_handle 6817 @ @return 0 if ok 6818 */ 6819 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6820 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6821 if (!conn) return GAP_CONNECTION_INVALID; 6822 conn->sniff_min_interval = 0xffff; 6823 hci_run(); 6824 return 0; 6825 } 6826 6827 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){ 6828 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6829 if (!conn) return GAP_CONNECTION_INVALID; 6830 conn->sniff_subrating_max_latency = max_latency; 6831 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6832 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6833 hci_run(); 6834 return ERROR_CODE_SUCCESS; 6835 } 6836 6837 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){ 6838 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6839 if (!conn) return GAP_CONNECTION_INVALID; 6840 conn->qos_service_type = service_type; 6841 conn->qos_token_rate = token_rate; 6842 conn->qos_peak_bandwidth = peak_bandwidth; 6843 conn->qos_latency = latency; 6844 conn->qos_delay_variation = delay_variation; 6845 hci_run(); 6846 return ERROR_CODE_SUCCESS; 6847 } 6848 6849 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6850 hci_stack->new_page_scan_interval = page_scan_interval; 6851 hci_stack->new_page_scan_window = page_scan_window; 6852 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6853 hci_run(); 6854 } 6855 6856 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6857 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6858 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6859 hci_run(); 6860 } 6861 6862 void gap_set_page_timeout(uint16_t page_timeout){ 6863 hci_stack->page_timeout = page_timeout; 6864 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6865 hci_run(); 6866 } 6867 6868 #endif 6869 6870 void hci_halting_defer(void){ 6871 if (hci_stack->state != HCI_STATE_HALTING) return; 6872 switch (hci_stack->substate){ 6873 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6874 case HCI_HALTING_CLOSE: 6875 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6876 break; 6877 default: 6878 break; 6879 } 6880 } 6881 6882 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6883 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6884 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6885 if (le_device_db_index >= le_device_db_max_count()) return; 6886 uint8_t offset = le_device_db_index >> 3; 6887 uint8_t mask = 1 << (le_device_db_index & 7); 6888 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6889 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6890 // note: go back to remove entries, otherwise, a remove + add will skip the add 6891 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6892 } 6893 } 6894 6895 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6896 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6897 if (le_device_db_index >= le_device_db_max_count()) return; 6898 uint8_t offset = le_device_db_index >> 3; 6899 uint8_t mask = 1 << (le_device_db_index & 7); 6900 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6901 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6902 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6903 } 6904 } 6905 6906 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6907 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6908 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6909 } 6910 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6911 // restart le resolving list update 6912 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6913 } 6914 return ERROR_CODE_SUCCESS; 6915 } 6916 #endif 6917 6918 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6919 void hci_setup_test_connections_fuzz(void){ 6920 hci_connection_t * conn; 6921 6922 // default address: 66:55:44:33:00:01 6923 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6924 6925 // setup Controller info 6926 hci_stack->num_cmd_packets = 255; 6927 hci_stack->acl_packets_total_num = 255; 6928 6929 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6930 addr[5] = 0x01; 6931 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6932 conn->con_handle = addr[5]; 6933 conn->role = HCI_ROLE_SLAVE; 6934 conn->state = RECEIVED_CONNECTION_REQUEST; 6935 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6936 6937 // setup incoming Classic SCO connection with con handle 0x0002 6938 addr[5] = 0x02; 6939 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6940 conn->con_handle = addr[5]; 6941 conn->role = HCI_ROLE_SLAVE; 6942 conn->state = RECEIVED_CONNECTION_REQUEST; 6943 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6944 6945 // setup ready Classic ACL connection with con handle 0x0003 6946 addr[5] = 0x03; 6947 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6948 conn->con_handle = addr[5]; 6949 conn->role = HCI_ROLE_SLAVE; 6950 conn->state = OPEN; 6951 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6952 6953 // setup ready Classic SCO connection with con handle 0x0004 6954 addr[5] = 0x04; 6955 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6956 conn->con_handle = addr[5]; 6957 conn->role = HCI_ROLE_SLAVE; 6958 conn->state = OPEN; 6959 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6960 6961 // setup ready LE ACL connection with con handle 0x005 and public address 6962 addr[5] = 0x05; 6963 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6964 conn->con_handle = addr[5]; 6965 conn->role = HCI_ROLE_SLAVE; 6966 conn->state = OPEN; 6967 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6968 conn->sm_connection.sm_connection_encrypted = 1; 6969 } 6970 6971 void hci_free_connections_fuzz(void){ 6972 btstack_linked_list_iterator_t it; 6973 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6974 while (btstack_linked_list_iterator_has_next(&it)){ 6975 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6976 btstack_linked_list_iterator_remove(&it); 6977 btstack_memory_hci_connection_free(con); 6978 } 6979 } 6980 void hci_simulate_working_fuzz(void){ 6981 hci_init_done(); 6982 hci_stack->num_cmd_packets = 255; 6983 } 6984 #endif 6985