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 BLUEKITCHEN 24 * GMBH 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_halting_timeout_handler(btstack_timer_source_t * ds); 156 static void hci_emit_transport_packet_sent(void); 157 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 158 static void hci_emit_nr_connections_changed(void); 159 static void hci_emit_hci_open_failed(void); 160 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 161 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 162 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 163 static void hci_run(void); 164 static int hci_is_le_connection(hci_connection_t * connection); 165 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 166 167 #ifdef ENABLE_CLASSIC 168 static int hci_have_usb_transport(void); 169 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 170 #endif 171 172 #ifdef ENABLE_BLE 173 #ifdef ENABLE_LE_CENTRAL 174 // called from test/ble_client/advertising_data_parser.c 175 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 176 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 177 static void hci_whitelist_free(void); 178 static hci_connection_t * gap_get_outgoing_connection(void); 179 #endif 180 #endif 181 182 // the STACK is here 183 #ifndef HAVE_MALLOC 184 static hci_stack_t hci_stack_static; 185 #endif 186 static hci_stack_t * hci_stack = NULL; 187 188 #ifdef ENABLE_CLASSIC 189 // default name 190 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 191 192 // test helper 193 static uint8_t disable_l2cap_timeouts = 0; 194 #endif 195 196 // reset connection state on create and on reconnect 197 // don't overwrite addr, con handle, role 198 static void hci_connection_init(hci_connection_t * conn){ 199 conn->authentication_flags = AUTH_FLAG_NONE; 200 conn->bonding_flags = 0; 201 conn->requested_security_level = LEVEL_0; 202 #ifdef ENABLE_CLASSIC 203 conn->request_role = HCI_ROLE_INVALID; 204 conn->sniff_subrating_max_latency = 0xffff; 205 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 206 conn->link_key_type = INVALID_LINK_KEY; 207 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 208 btstack_run_loop_set_timer_context(&conn->timeout, conn); 209 hci_connection_timestamp(conn); 210 #endif 211 conn->acl_recombination_length = 0; 212 conn->acl_recombination_pos = 0; 213 conn->num_packets_sent = 0; 214 215 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 216 #ifdef ENABLE_BLE 217 conn->le_phy_update_all_phys = 0xff; 218 #endif 219 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 220 conn->le_max_tx_octets = 27; 221 #endif 222 #ifdef ENABLE_CLASSIC_PAIRING_OOB 223 conn->classic_oob_c_192 = NULL; 224 conn->classic_oob_r_192 = NULL; 225 conn->classic_oob_c_256 = NULL; 226 conn->classic_oob_r_256 = NULL; 227 #endif 228 } 229 230 /** 231 * create connection for given address 232 * 233 * @return connection OR NULL, if no memory left 234 */ 235 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 236 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 237 238 hci_connection_t * conn = btstack_memory_hci_connection_get(); 239 if (!conn) return NULL; 240 hci_connection_init(conn); 241 242 bd_addr_copy(conn->address, addr); 243 conn->address_type = addr_type; 244 conn->con_handle = HCI_CON_HANDLE_INVALID; 245 conn->role = HCI_ROLE_INVALID; 246 247 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 248 249 return conn; 250 } 251 252 253 /** 254 * get le connection parameter range 255 * 256 * @return le connection parameter range struct 257 */ 258 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 259 *range = hci_stack->le_connection_parameter_range; 260 } 261 262 /** 263 * set le connection parameter range 264 * 265 */ 266 267 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 268 hci_stack->le_connection_parameter_range = *range; 269 } 270 271 /** 272 * @brief Test if connection parameters are inside in existing rage 273 * @param conn_interval_min (unit: 1.25ms) 274 * @param conn_interval_max (unit: 1.25ms) 275 * @param conn_latency 276 * @param supervision_timeout (unit: 10ms) 277 * @return 1 if included 278 */ 279 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){ 280 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 281 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 282 283 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 284 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 285 286 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 287 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 288 289 return 1; 290 } 291 292 /** 293 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 294 * @note: default: 1 295 * @param max_peripheral_connections 296 */ 297 #ifdef ENABLE_LE_PERIPHERAL 298 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 299 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 300 } 301 #endif 302 303 /** 304 * get hci connections iterator 305 * 306 * @return hci connections iterator 307 */ 308 309 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 310 btstack_linked_list_iterator_init(it, &hci_stack->connections); 311 } 312 313 /** 314 * get connection for a given handle 315 * 316 * @return connection OR NULL, if not found 317 */ 318 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 319 btstack_linked_list_iterator_t it; 320 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 321 while (btstack_linked_list_iterator_has_next(&it)){ 322 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 323 if ( item->con_handle == con_handle ) { 324 return item; 325 } 326 } 327 return NULL; 328 } 329 330 /** 331 * get connection for given address 332 * 333 * @return connection OR NULL, if not found 334 */ 335 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 336 btstack_linked_list_iterator_t it; 337 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 338 while (btstack_linked_list_iterator_has_next(&it)){ 339 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 340 if (connection->address_type != addr_type) continue; 341 if (memcmp(addr, connection->address, 6) != 0) continue; 342 return connection; 343 } 344 return NULL; 345 } 346 347 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 348 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 349 } 350 351 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 352 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 353 } 354 355 #ifdef ENABLE_CLASSIC 356 357 #ifdef ENABLE_SCO_OVER_HCI 358 static int hci_number_sco_connections(void){ 359 int connections = 0; 360 btstack_linked_list_iterator_t it; 361 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 362 while (btstack_linked_list_iterator_has_next(&it)){ 363 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 364 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 365 connections++; 366 } 367 return connections; 368 } 369 #endif 370 371 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 372 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 373 #ifdef HAVE_EMBEDDED_TICK 374 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 375 // connections might be timed out 376 hci_emit_l2cap_check_timeout(connection); 377 } 378 #else 379 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 380 // connections might be timed out 381 hci_emit_l2cap_check_timeout(connection); 382 } 383 #endif 384 } 385 386 static void hci_connection_timestamp(hci_connection_t *connection){ 387 #ifdef HAVE_EMBEDDED_TICK 388 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 389 #else 390 connection->timestamp = btstack_run_loop_get_time_ms(); 391 #endif 392 } 393 394 /** 395 * add authentication flags and reset timer 396 * @note: assumes classic connection 397 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 398 */ 399 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 400 bd_addr_t addr; 401 reverse_bd_addr(bd_addr, addr); 402 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 403 if (conn) { 404 connectionSetAuthenticationFlags(conn, flags); 405 hci_connection_timestamp(conn); 406 } 407 } 408 409 static bool hci_pairing_active(hci_connection_t * hci_connection){ 410 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 411 } 412 413 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 414 if (hci_pairing_active(hci_connection)) return; 415 if (ssp){ 416 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 417 } else { 418 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 419 } 420 // if we are initiator, we have sent an HCI Authenticate Request 421 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 422 423 // if we are responder, use minimal service security level as required level 424 if (!initiator){ 425 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); 426 } 427 428 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 429 430 uint8_t event[12]; 431 event[0] = GAP_EVENT_PAIRING_STARTED; 432 event[1] = 10; 433 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 434 reverse_bd_addr(hci_connection->address, &event[4]); 435 event[10] = (uint8_t) ssp; 436 event[11] = (uint8_t) initiator; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 441 hci_connection->requested_security_level = LEVEL_0; 442 if (!hci_pairing_active(hci_connection)) return; 443 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 444 #ifdef ENABLE_CLASSIC_PAIRING_OOB 445 hci_connection->classic_oob_c_192 = NULL; 446 hci_connection->classic_oob_r_192 = NULL; 447 hci_connection->classic_oob_c_256 = NULL; 448 hci_connection->classic_oob_r_256 = NULL; 449 #endif 450 log_info("pairing complete, status %02x", status); 451 452 uint8_t event[11]; 453 event[0] = GAP_EVENT_PAIRING_COMPLETE; 454 event[1] = 9; 455 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 456 reverse_bd_addr(hci_connection->address, &event[4]); 457 event[10] = status; 458 hci_emit_event(event, sizeof(event), 1); 459 } 460 461 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 462 hci_connection_t * conn = hci_connection_for_handle(handle); 463 if (!conn) return false; 464 return hci_pairing_active(conn); 465 } 466 467 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 468 if (!hci_stack->link_key_db) return; 469 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 470 hci_stack->link_key_db->delete_link_key(addr); 471 } 472 473 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 474 if (!hci_stack->link_key_db) return; 475 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 476 hci_stack->link_key_db->put_link_key(addr, link_key, type); 477 } 478 479 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 480 if (!hci_stack->link_key_db) return false; 481 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 482 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 483 return result; 484 } 485 486 void gap_delete_all_link_keys(void){ 487 bd_addr_t addr; 488 link_key_t link_key; 489 link_key_type_t type; 490 btstack_link_key_iterator_t it; 491 int ok = gap_link_key_iterator_init(&it); 492 if (!ok) { 493 log_error("could not initialize iterator"); 494 return; 495 } 496 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 497 gap_drop_link_key_for_bd_addr(addr); 498 } 499 gap_link_key_iterator_done(&it); 500 } 501 502 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 503 if (!hci_stack->link_key_db) return 0; 504 if (!hci_stack->link_key_db->iterator_init) return 0; 505 return hci_stack->link_key_db->iterator_init(it); 506 } 507 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){ 508 if (!hci_stack->link_key_db) return 0; 509 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 510 } 511 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 512 if (!hci_stack->link_key_db) return; 513 hci_stack->link_key_db->iterator_done(it); 514 } 515 #endif 516 517 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 518 switch (address_type){ 519 case BD_ADDR_TYPE_LE_PUBLIC: 520 case BD_ADDR_TYPE_LE_RANDOM: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 522 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 523 return true; 524 default: 525 return false; 526 } 527 } 528 529 static int hci_is_le_connection(hci_connection_t * connection){ 530 return hci_is_le_connection_type(connection->address_type); 531 } 532 533 /** 534 * count connections 535 */ 536 static int nr_hci_connections(void){ 537 int count = 0; 538 btstack_linked_item_t *it; 539 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 540 count++; 541 } 542 return count; 543 } 544 545 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 546 547 unsigned int num_packets_sent_classic = 0; 548 unsigned int num_packets_sent_le = 0; 549 550 btstack_linked_item_t *it; 551 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 552 hci_connection_t * connection = (hci_connection_t *) it; 553 if (hci_is_le_connection(connection)){ 554 num_packets_sent_le += connection->num_packets_sent; 555 } 556 if (connection->address_type == BD_ADDR_TYPE_ACL){ 557 num_packets_sent_classic += connection->num_packets_sent; 558 } 559 } 560 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 561 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 562 int free_slots_le = 0; 563 564 if (free_slots_classic < 0){ 565 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); 566 return 0; 567 } 568 569 if (hci_stack->le_acl_packets_total_num){ 570 // if we have LE slots, they are used 571 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 572 if (free_slots_le < 0){ 573 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); 574 return 0; 575 } 576 } else { 577 // otherwise, classic slots are used for LE, too 578 free_slots_classic -= num_packets_sent_le; 579 if (free_slots_classic < 0){ 580 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); 581 return 0; 582 } 583 } 584 585 switch (address_type){ 586 case BD_ADDR_TYPE_UNKNOWN: 587 log_error("hci_number_free_acl_slots: unknown address type"); 588 return 0; 589 590 case BD_ADDR_TYPE_ACL: 591 return free_slots_classic; 592 593 default: 594 if (hci_stack->le_acl_packets_total_num){ 595 return free_slots_le; 596 } 597 return free_slots_classic; 598 } 599 } 600 601 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 602 // get connection type 603 hci_connection_t * connection = hci_connection_for_handle(con_handle); 604 if (!connection){ 605 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 606 return 0; 607 } 608 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 609 } 610 611 #ifdef ENABLE_CLASSIC 612 static int hci_number_free_sco_slots(void){ 613 unsigned int num_sco_packets_sent = 0; 614 btstack_linked_item_t *it; 615 if (hci_stack->synchronous_flow_control_enabled){ 616 // explicit flow control 617 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 618 hci_connection_t * connection = (hci_connection_t *) it; 619 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 620 num_sco_packets_sent += connection->num_packets_sent; 621 } 622 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 623 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 624 return 0; 625 } 626 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 627 } else { 628 // implicit flow control -- TODO 629 int num_ready = 0; 630 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 631 hci_connection_t * connection = (hci_connection_t *) it; 632 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 633 if (connection->sco_tx_ready == 0) continue; 634 num_ready++; 635 } 636 return num_ready; 637 } 638 } 639 #endif 640 641 // only used to send HCI Host Number Completed Packets 642 static int hci_can_send_comand_packet_transport(void){ 643 if (hci_stack->hci_packet_buffer_reserved) return 0; 644 645 // check for async hci transport implementations 646 if (hci_stack->hci_transport->can_send_packet_now){ 647 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 648 return 0; 649 } 650 } 651 return 1; 652 } 653 654 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 655 bool hci_can_send_command_packet_now(void){ 656 if (hci_can_send_comand_packet_transport() == 0) return false; 657 return hci_stack->num_cmd_packets > 0u; 658 } 659 660 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 661 // check for async hci transport implementations 662 if (!hci_stack->hci_transport->can_send_packet_now) return true; 663 return hci_stack->hci_transport->can_send_packet_now(packet_type); 664 } 665 666 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 667 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 668 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 669 } 670 671 bool hci_can_send_acl_le_packet_now(void){ 672 if (hci_stack->hci_packet_buffer_reserved) return false; 673 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 674 } 675 676 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 677 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 678 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 679 } 680 681 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 682 if (hci_stack->hci_packet_buffer_reserved) return false; 683 return hci_can_send_prepared_acl_packet_now(con_handle); 684 } 685 686 #ifdef ENABLE_CLASSIC 687 bool hci_can_send_acl_classic_packet_now(void){ 688 if (hci_stack->hci_packet_buffer_reserved) return false; 689 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 690 } 691 692 bool hci_can_send_prepared_sco_packet_now(void){ 693 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 694 if (hci_have_usb_transport()){ 695 return hci_stack->sco_can_send_now; 696 } else { 697 return hci_number_free_sco_slots() > 0; 698 } 699 } 700 701 bool hci_can_send_sco_packet_now(void){ 702 if (hci_stack->hci_packet_buffer_reserved) return false; 703 return hci_can_send_prepared_sco_packet_now(); 704 } 705 706 void hci_request_sco_can_send_now_event(void){ 707 hci_stack->sco_waiting_for_can_send_now = 1; 708 hci_notify_if_sco_can_send_now(); 709 } 710 #endif 711 712 // used for internal checks in l2cap.c 713 bool hci_is_packet_buffer_reserved(void){ 714 return hci_stack->hci_packet_buffer_reserved; 715 } 716 717 // reserves outgoing packet buffer. 718 // @return 1 if successful 719 bool hci_reserve_packet_buffer(void){ 720 if (hci_stack->hci_packet_buffer_reserved) { 721 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 722 return false; 723 } 724 hci_stack->hci_packet_buffer_reserved = true; 725 return true; 726 } 727 728 void hci_release_packet_buffer(void){ 729 hci_stack->hci_packet_buffer_reserved = false; 730 } 731 732 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 733 static int hci_transport_synchronous(void){ 734 return hci_stack->hci_transport->can_send_packet_now == NULL; 735 } 736 737 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 738 739 // 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); 740 741 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 742 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 743 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 744 max_acl_data_packet_length = hci_stack->le_data_packets_length; 745 } 746 747 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 748 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 749 max_acl_data_packet_length = connection->le_max_tx_octets; 750 } 751 #endif 752 753 log_debug("hci_send_acl_packet_fragments entered"); 754 755 uint8_t status = ERROR_CODE_SUCCESS; 756 // multiple packets could be send on a synchronous HCI transport 757 while (true){ 758 759 log_debug("hci_send_acl_packet_fragments loop entered"); 760 761 // get current data 762 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 763 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 764 bool more_fragments = false; 765 766 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 767 if (current_acl_data_packet_length > max_acl_data_packet_length){ 768 more_fragments = true; 769 current_acl_data_packet_length = max_acl_data_packet_length; 770 } 771 772 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 773 if (acl_header_pos > 0u){ 774 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 775 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 776 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 777 } 778 779 // update header len 780 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 781 782 // count packet 783 connection->num_packets_sent++; 784 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 785 786 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 787 if (more_fragments){ 788 // update start of next fragment to send 789 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 790 } else { 791 // done 792 hci_stack->acl_fragmentation_pos = 0; 793 hci_stack->acl_fragmentation_total_size = 0; 794 } 795 796 // send packet 797 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 798 const int size = current_acl_data_packet_length + 4; 799 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 800 hci_stack->acl_fragmentation_tx_active = 1; 801 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 802 if (err != 0){ 803 // no error from HCI Transport expected 804 status = ERROR_CODE_HARDWARE_FAILURE; 805 } 806 807 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 808 809 // done yet? 810 if (!more_fragments) break; 811 812 // can send more? 813 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 814 } 815 816 log_debug("hci_send_acl_packet_fragments loop over"); 817 818 // release buffer now for synchronous transport 819 if (hci_transport_synchronous()){ 820 hci_stack->acl_fragmentation_tx_active = 0; 821 hci_release_packet_buffer(); 822 hci_emit_transport_packet_sent(); 823 } 824 825 return status; 826 } 827 828 // pre: caller has reserved the packet buffer 829 uint8_t hci_send_acl_packet_buffer(int size){ 830 btstack_assert(hci_stack->hci_packet_buffer_reserved); 831 832 uint8_t * packet = hci_stack->hci_packet_buffer; 833 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 834 835 // check for free places on Bluetooth module 836 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 837 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 return BTSTACK_ACL_BUFFERS_FULL; 841 } 842 843 hci_connection_t *connection = hci_connection_for_handle( con_handle); 844 if (!connection) { 845 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 846 hci_release_packet_buffer(); 847 hci_emit_transport_packet_sent(); 848 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 849 } 850 851 #ifdef ENABLE_CLASSIC 852 hci_connection_timestamp(connection); 853 #endif 854 855 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 856 857 // setup data 858 hci_stack->acl_fragmentation_total_size = size; 859 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 860 861 return hci_send_acl_packet_fragments(connection); 862 } 863 864 #ifdef ENABLE_CLASSIC 865 // pre: caller has reserved the packet buffer 866 uint8_t hci_send_sco_packet_buffer(int size){ 867 btstack_assert(hci_stack->hci_packet_buffer_reserved); 868 869 uint8_t * packet = hci_stack->hci_packet_buffer; 870 871 // skip checks in loopback mode 872 if (!hci_stack->loopback_mode){ 873 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 874 875 // check for free places on Bluetooth module 876 if (!hci_can_send_prepared_sco_packet_now()) { 877 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 878 hci_release_packet_buffer(); 879 hci_emit_transport_packet_sent(); 880 return BTSTACK_ACL_BUFFERS_FULL; 881 } 882 883 // track send packet in connection struct 884 hci_connection_t *connection = hci_connection_for_handle( con_handle); 885 if (!connection) { 886 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 887 hci_release_packet_buffer(); 888 hci_emit_transport_packet_sent(); 889 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 890 } 891 892 if (hci_have_usb_transport()){ 893 // token used 894 hci_stack->sco_can_send_now = false; 895 } else { 896 if (hci_stack->synchronous_flow_control_enabled){ 897 connection->num_packets_sent++; 898 } else { 899 connection->sco_tx_ready--; 900 } 901 } 902 } 903 904 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 905 906 #ifdef HAVE_SCO_TRANSPORT 907 hci_stack->sco_transport->send_packet(packet, size); 908 hci_release_packet_buffer(); 909 hci_emit_transport_packet_sent(); 910 911 return 0; 912 #else 913 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 914 if (hci_transport_synchronous()){ 915 hci_release_packet_buffer(); 916 hci_emit_transport_packet_sent(); 917 } 918 919 if (err != 0){ 920 return ERROR_CODE_HARDWARE_FAILURE; 921 } 922 return ERROR_CODE_SUCCESS; 923 #endif 924 } 925 #endif 926 927 static void acl_handler(uint8_t *packet, uint16_t size){ 928 929 // get info 930 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 931 hci_connection_t *conn = hci_connection_for_handle(con_handle); 932 uint8_t acl_flags = READ_ACL_FLAGS(packet); 933 uint16_t acl_length = READ_ACL_LENGTH(packet); 934 935 // ignore non-registered handle 936 if (!conn){ 937 log_error("acl_handler called with non-registered handle %u!" , con_handle); 938 return; 939 } 940 941 // assert packet is complete 942 if ((acl_length + 4u) != size){ 943 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 944 return; 945 } 946 947 #ifdef ENABLE_CLASSIC 948 // update idle timestamp 949 hci_connection_timestamp(conn); 950 #endif 951 952 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 953 hci_stack->host_completed_packets = 1; 954 conn->num_packets_completed++; 955 #endif 956 957 // handle different packet types 958 switch (acl_flags & 0x03u) { 959 960 case 0x01: // continuation fragment 961 962 // sanity checks 963 if (conn->acl_recombination_pos == 0u) { 964 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 965 return; 966 } 967 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 968 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 969 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 970 conn->acl_recombination_pos = 0; 971 return; 972 } 973 974 // append fragment payload (header already stored) 975 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 976 &packet[4], acl_length); 977 conn->acl_recombination_pos += acl_length; 978 979 // forward complete L2CAP packet if complete. 980 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 981 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 982 // reset recombination buffer 983 conn->acl_recombination_length = 0; 984 conn->acl_recombination_pos = 0; 985 } 986 break; 987 988 case 0x02: { // first fragment 989 990 // sanity check 991 if (conn->acl_recombination_pos) { 992 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 993 conn->acl_recombination_pos = 0; 994 } 995 996 // peek into L2CAP packet! 997 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 998 999 // compare fragment size to L2CAP packet size 1000 if (acl_length >= (l2cap_length + 4u)){ 1001 // forward fragment as L2CAP packet 1002 hci_emit_acl_packet(packet, acl_length + 4u); 1003 } else { 1004 1005 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1006 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1007 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1008 return; 1009 } 1010 1011 // store first fragment and tweak acl length for complete package 1012 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1013 packet, acl_length + 4u); 1014 conn->acl_recombination_pos = acl_length + 4u; 1015 conn->acl_recombination_length = l2cap_length; 1016 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1017 } 1018 break; 1019 1020 } 1021 default: 1022 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1023 return; 1024 } 1025 1026 // execute main loop 1027 hci_run(); 1028 } 1029 1030 static void hci_connection_stop_timer(hci_connection_t * conn){ 1031 btstack_run_loop_remove_timer(&conn->timeout); 1032 #ifdef ENABLE_CLASSIC 1033 btstack_run_loop_remove_timer(&conn->timeout_sco); 1034 #endif 1035 } 1036 1037 static void hci_shutdown_connection(hci_connection_t *conn){ 1038 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1039 1040 #ifdef ENABLE_CLASSIC 1041 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1042 bd_addr_type_t addr_type = conn->address_type; 1043 #endif 1044 #ifdef HAVE_SCO_TRANSPORT 1045 hci_con_handle_t con_handle = conn->con_handle; 1046 #endif 1047 #endif 1048 1049 hci_connection_stop_timer(conn); 1050 1051 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1052 btstack_memory_hci_connection_free( conn ); 1053 1054 // now it's gone 1055 hci_emit_nr_connections_changed(); 1056 1057 #ifdef ENABLE_CLASSIC 1058 #ifdef ENABLE_SCO_OVER_HCI 1059 // update SCO 1060 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1061 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1062 } 1063 #endif 1064 #ifdef HAVE_SCO_TRANSPORT 1065 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1066 hci_stack->sco_transport->close(con_handle); 1067 } 1068 #endif 1069 #endif 1070 } 1071 1072 #ifdef ENABLE_CLASSIC 1073 1074 static const uint16_t packet_type_sizes[] = { 1075 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1076 HCI_ACL_DH1_SIZE, 0, 0, 0, 1077 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1078 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1079 }; 1080 static const uint8_t packet_type_feature_requirement_bit[] = { 1081 0, // 3 slot packets 1082 1, // 5 slot packets 1083 25, // EDR 2 mpbs 1084 26, // EDR 3 mbps 1085 39, // 3 slot EDR packts 1086 40, // 5 slot EDR packet 1087 }; 1088 static const uint16_t packet_type_feature_packet_mask[] = { 1089 0x0f00, // 3 slot packets 1090 0xf000, // 5 slot packets 1091 0x1102, // EDR 2 mpbs 1092 0x2204, // EDR 3 mbps 1093 0x0300, // 3 slot EDR packts 1094 0x3000, // 5 slot EDR packet 1095 }; 1096 1097 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1098 // enable packet types based on size 1099 uint16_t packet_types = 0; 1100 unsigned int i; 1101 for (i=0;i<16;i++){ 1102 if (packet_type_sizes[i] == 0) continue; 1103 if (packet_type_sizes[i] <= buffer_size){ 1104 packet_types |= 1 << i; 1105 } 1106 } 1107 // disable packet types due to missing local supported features 1108 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1109 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1110 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1111 if (feature_set) continue; 1112 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1113 packet_types &= ~packet_type_feature_packet_mask[i]; 1114 } 1115 // flip bits for "may not be used" 1116 packet_types ^= 0x3306; 1117 return packet_types; 1118 } 1119 1120 uint16_t hci_usable_acl_packet_types(void){ 1121 return hci_stack->packet_types; 1122 } 1123 #endif 1124 1125 uint8_t* hci_get_outgoing_packet_buffer(void){ 1126 // hci packet buffer is >= acl data packet length 1127 return hci_stack->hci_packet_buffer; 1128 } 1129 1130 uint16_t hci_max_acl_data_packet_length(void){ 1131 return hci_stack->acl_data_packet_length; 1132 } 1133 1134 #ifdef ENABLE_CLASSIC 1135 bool hci_extended_sco_link_supported(void){ 1136 // No. 31, byte 3, bit 7 1137 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1138 } 1139 #endif 1140 1141 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1142 // No. 54, byte 6, bit 6 1143 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1144 } 1145 1146 static int gap_ssp_supported(void){ 1147 // No. 51, byte 6, bit 3 1148 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1149 } 1150 1151 static int hci_classic_supported(void){ 1152 #ifdef ENABLE_CLASSIC 1153 // No. 37, byte 4, bit 5, = No BR/EDR Support 1154 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1155 #else 1156 return 0; 1157 #endif 1158 } 1159 1160 static int hci_le_supported(void){ 1161 #ifdef ENABLE_BLE 1162 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1163 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1164 #else 1165 return 0; 1166 #endif 1167 } 1168 1169 #ifdef ENABLE_BLE 1170 1171 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1172 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1173 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1174 } else { 1175 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1176 } 1177 } 1178 1179 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1180 *addr_type = hci_stack->le_own_addr_type; 1181 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1182 } 1183 1184 #ifdef ENABLE_LE_PERIPHERAL 1185 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1186 *addr_type = hci_stack->le_advertisements_own_addr_type; 1187 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1188 }; 1189 #endif 1190 1191 #ifdef ENABLE_LE_CENTRAL 1192 1193 /** 1194 * @brief Get own addr type and address used for LE connections (Central) 1195 */ 1196 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1197 *addr_type = hci_stack->le_connection_own_addr_type; 1198 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1199 } 1200 1201 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1202 1203 int offset = 3; 1204 int num_reports = packet[offset]; 1205 offset += 1; 1206 1207 int i; 1208 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1209 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1210 for (i=0; (i<num_reports) && (offset < size);i++){ 1211 // sanity checks on data_length: 1212 uint8_t data_length = packet[offset + 8]; 1213 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1214 if ((offset + 9u + data_length + 1u) > size) return; 1215 // setup event 1216 uint8_t event_size = 10u + data_length; 1217 int pos = 0; 1218 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1219 event[pos++] = event_size; 1220 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1221 offset += 8; 1222 pos += 8; 1223 event[pos++] = packet[offset + 1 + data_length]; // rssi 1224 event[pos++] = data_length; 1225 offset++; 1226 (void)memcpy(&event[pos], &packet[offset], data_length); 1227 pos += data_length; 1228 offset += data_length + 1u; // rssi 1229 hci_emit_event(event, pos, 1); 1230 } 1231 } 1232 #endif 1233 #endif 1234 1235 #ifdef ENABLE_BLE 1236 #ifdef ENABLE_LE_PERIPHERAL 1237 static void hci_update_advertisements_enabled_for_current_roles(void){ 1238 if (hci_stack->le_advertisements_enabled){ 1239 // get number of active le slave connections 1240 int num_slave_connections = 0; 1241 btstack_linked_list_iterator_t it; 1242 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1243 while (btstack_linked_list_iterator_has_next(&it)){ 1244 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1245 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1246 if (con->state != OPEN) continue; 1247 if (con->role != HCI_ROLE_SLAVE) continue; 1248 if (!hci_is_le_connection(con)) continue; 1249 num_slave_connections++; 1250 } 1251 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1252 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1253 } else { 1254 hci_stack->le_advertisements_enabled_for_current_roles = false; 1255 } 1256 } 1257 #endif 1258 #endif 1259 1260 #ifdef ENABLE_CLASSIC 1261 static void gap_run_set_local_name(void){ 1262 hci_reserve_packet_buffer(); 1263 uint8_t * packet = hci_stack->hci_packet_buffer; 1264 // construct HCI Command and send 1265 uint16_t opcode = hci_write_local_name.opcode; 1266 hci_stack->last_cmd_opcode = opcode; 1267 packet[0] = opcode & 0xff; 1268 packet[1] = opcode >> 8; 1269 packet[2] = DEVICE_NAME_LEN; 1270 memset(&packet[3], 0, DEVICE_NAME_LEN); 1271 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1272 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1273 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1274 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1275 // expand '00:00:00:00:00:00' in name with bd_addr 1276 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1277 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1278 } 1279 1280 static void gap_run_set_eir_data(void){ 1281 hci_reserve_packet_buffer(); 1282 uint8_t * packet = hci_stack->hci_packet_buffer; 1283 // construct HCI Command in-place and send 1284 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1285 hci_stack->last_cmd_opcode = opcode; 1286 uint16_t offset = 0; 1287 packet[offset++] = opcode & 0xff; 1288 packet[offset++] = opcode >> 8; 1289 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1290 packet[offset++] = 0; // FEC not required 1291 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1292 if (hci_stack->eir_data){ 1293 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1294 ad_context_t context; 1295 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1296 uint8_t data_type = ad_iterator_get_data_type(&context); 1297 uint8_t size = ad_iterator_get_data_len(&context); 1298 const uint8_t *data = ad_iterator_get_data(&context); 1299 // copy item 1300 packet[offset++] = size + 1; 1301 packet[offset++] = data_type; 1302 memcpy(&packet[offset], data, size); 1303 // update name item 1304 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1305 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1306 } 1307 offset += size; 1308 } 1309 } else { 1310 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1311 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1312 packet[offset++] = bytes_to_copy + 1; 1313 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1314 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1315 // expand '00:00:00:00:00:00' in name with bd_addr 1316 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1317 } 1318 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1319 } 1320 1321 static void hci_run_gap_tasks_classic(void){ 1322 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1323 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1324 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1325 return; 1326 } 1327 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1328 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1329 gap_run_set_local_name(); 1330 return; 1331 } 1332 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1333 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1334 gap_run_set_eir_data(); 1335 return; 1336 } 1337 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1338 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1339 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1340 return; 1341 } 1342 // write page scan activity 1343 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1344 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1345 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1346 return; 1347 } 1348 // write page scan type 1349 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1350 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1351 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1352 return; 1353 } 1354 // write page timeout 1355 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1356 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1357 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1358 return; 1359 } 1360 // send scan enable 1361 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1362 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1363 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1364 return; 1365 } 1366 // send write scan activity 1367 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1368 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1369 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1370 return; 1371 } 1372 } 1373 #endif 1374 1375 #ifndef HAVE_HOST_CONTROLLER_API 1376 1377 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1378 if (!hci_stack->config) return 0; 1379 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1380 // Limit baud rate for Broadcom chipsets to 3 mbps 1381 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1382 baud_rate = 3000000; 1383 } 1384 return baud_rate; 1385 } 1386 1387 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1388 UNUSED(ds); 1389 1390 switch (hci_stack->substate){ 1391 case HCI_INIT_W4_SEND_RESET: 1392 log_info("Resend HCI Reset"); 1393 hci_stack->substate = HCI_INIT_SEND_RESET; 1394 hci_stack->num_cmd_packets = 1; 1395 hci_run(); 1396 break; 1397 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1398 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1399 if (hci_stack->hci_transport->reset_link){ 1400 hci_stack->hci_transport->reset_link(); 1401 } 1402 1403 /* fall through */ 1404 1405 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1406 log_info("Resend HCI Reset - CSR Warm Boot"); 1407 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1408 hci_stack->num_cmd_packets = 1; 1409 hci_run(); 1410 break; 1411 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1412 if (hci_stack->hci_transport->set_baudrate){ 1413 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1414 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1415 hci_stack->hci_transport->set_baudrate(baud_rate); 1416 } 1417 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1418 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1419 if (hci_stack->hci_transport->reset_link){ 1420 log_info("Link Reset"); 1421 hci_stack->hci_transport->reset_link(); 1422 } 1423 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1424 hci_run(); 1425 } 1426 break; 1427 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1428 // otherwise continue 1429 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1430 hci_send_cmd(&hci_read_local_supported_commands); 1431 break; 1432 default: 1433 break; 1434 } 1435 } 1436 #endif 1437 1438 static void hci_initializing_next_state(void){ 1439 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1440 } 1441 1442 static void hci_init_done(void){ 1443 // done. tell the app 1444 log_info("hci_init_done -> HCI_STATE_WORKING"); 1445 hci_stack->state = HCI_STATE_WORKING; 1446 hci_emit_state(); 1447 } 1448 1449 // assumption: hci_can_send_command_packet_now() == true 1450 static void hci_initializing_run(void){ 1451 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1452 1453 #ifndef HAVE_HOST_CONTROLLER_API 1454 bool need_baud_change = hci_stack->config 1455 && hci_stack->chipset 1456 && hci_stack->chipset->set_baudrate_command 1457 && hci_stack->hci_transport->set_baudrate 1458 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1459 #endif 1460 1461 switch (hci_stack->substate){ 1462 case HCI_INIT_SEND_RESET: 1463 hci_state_reset(); 1464 1465 #ifndef HAVE_HOST_CONTROLLER_API 1466 // prepare reset if command complete not received in 100ms 1467 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1468 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1469 btstack_run_loop_add_timer(&hci_stack->timeout); 1470 #endif 1471 // send command 1472 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1473 hci_send_cmd(&hci_reset); 1474 break; 1475 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1476 hci_send_cmd(&hci_read_local_version_information); 1477 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1478 break; 1479 1480 #ifndef HAVE_HOST_CONTROLLER_API 1481 case HCI_INIT_SEND_READ_LOCAL_NAME: 1482 hci_send_cmd(&hci_read_local_name); 1483 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1484 break; 1485 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1486 hci_state_reset(); 1487 // prepare reset if command complete not received in 100ms 1488 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1489 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1490 btstack_run_loop_add_timer(&hci_stack->timeout); 1491 // send command 1492 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1493 hci_send_cmd(&hci_reset); 1494 break; 1495 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1496 hci_state_reset(); 1497 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1498 hci_send_cmd(&hci_reset); 1499 break; 1500 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1501 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1502 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1503 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1504 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1505 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1506 break; 1507 } 1508 case HCI_INIT_SET_BD_ADDR: 1509 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1510 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1511 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1512 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1513 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1514 break; 1515 case HCI_INIT_SEND_BAUD_CHANGE: 1516 if (need_baud_change) { 1517 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1518 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1519 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1520 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1521 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1522 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1523 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1524 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1525 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1526 btstack_run_loop_add_timer(&hci_stack->timeout); 1527 } 1528 break; 1529 } 1530 1531 /* fall through */ 1532 1533 case HCI_INIT_CUSTOM_INIT: 1534 // Custom initialization 1535 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1536 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1537 bool send_cmd = false; 1538 switch (hci_stack->chipset_result){ 1539 case BTSTACK_CHIPSET_VALID_COMMAND: 1540 send_cmd = true; 1541 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1542 break; 1543 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1544 send_cmd = true; 1545 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1546 log_info("CSR Warm Boot"); 1547 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1548 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1549 btstack_run_loop_add_timer(&hci_stack->timeout); 1550 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1551 && hci_stack->config 1552 && hci_stack->chipset 1553 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1554 && hci_stack->hci_transport->set_baudrate 1555 && hci_transport_uart_get_main_baud_rate()){ 1556 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1557 } else { 1558 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1559 } 1560 break; 1561 default: 1562 break; 1563 } 1564 1565 if (send_cmd){ 1566 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1567 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1568 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1569 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1570 break; 1571 } 1572 log_info("Init script done"); 1573 1574 // Init script download on Broadcom chipsets causes: 1575 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1576 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1577 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1578 1579 // - baud rate to reset, restore UART baud rate if needed 1580 if (need_baud_change) { 1581 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1582 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1583 hci_stack->hci_transport->set_baudrate(baud_rate); 1584 } 1585 1586 uint16_t bcm_delay_ms = 300; 1587 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1588 // -> Work around: wait here. 1589 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1590 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1591 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1592 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1593 btstack_run_loop_add_timer(&hci_stack->timeout); 1594 break; 1595 } 1596 } 1597 #endif 1598 /* fall through */ 1599 1600 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1601 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1602 hci_send_cmd(&hci_read_local_supported_commands); 1603 break; 1604 case HCI_INIT_READ_BD_ADDR: 1605 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1606 hci_send_cmd(&hci_read_bd_addr); 1607 break; 1608 case HCI_INIT_READ_BUFFER_SIZE: 1609 // only read buffer size if supported 1610 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1611 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1612 hci_send_cmd(&hci_read_buffer_size); 1613 break; 1614 } 1615 1616 /* fall through */ 1617 1618 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1619 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1620 hci_send_cmd(&hci_read_local_supported_features); 1621 break; 1622 1623 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1624 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1625 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1626 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1627 break; 1628 case HCI_INIT_HOST_BUFFER_SIZE: 1629 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1630 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1631 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1632 break; 1633 #endif 1634 1635 case HCI_INIT_SET_EVENT_MASK: 1636 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1637 if (hci_le_supported()){ 1638 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1639 } else { 1640 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1641 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1642 } 1643 break; 1644 1645 #ifdef ENABLE_CLASSIC 1646 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1647 if (hci_classic_supported() && gap_ssp_supported()){ 1648 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1649 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1650 break; 1651 } 1652 1653 /* fall through */ 1654 1655 case HCI_INIT_WRITE_INQUIRY_MODE: 1656 if (hci_classic_supported()){ 1657 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1658 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1659 break; 1660 } 1661 1662 /* fall through */ 1663 1664 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1665 // skip write secure connections host support if not supported or disabled 1666 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1667 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1668 hci_stack->secure_connections_active = true; 1669 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1670 break; 1671 } 1672 1673 #ifdef ENABLE_SCO_OVER_HCI 1674 /* fall through */ 1675 1676 // only sent if ENABLE_SCO_OVER_HCI is defined 1677 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1678 // skip write synchronous flow control if not supported 1679 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1680 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1681 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1682 break; 1683 } 1684 /* fall through */ 1685 1686 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1687 // skip write default erroneous data reporting if not supported 1688 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1689 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1690 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1691 break; 1692 } 1693 #endif 1694 1695 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1696 /* fall through */ 1697 1698 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1699 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1700 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1701 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1702 #ifdef ENABLE_SCO_OVER_HCI 1703 log_info("BCM: Route SCO data via HCI transport"); 1704 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1705 #endif 1706 #ifdef ENABLE_SCO_OVER_PCM 1707 log_info("BCM: Route SCO data via PCM interface"); 1708 #ifdef ENABLE_BCM_PCM_WBS 1709 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1710 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1711 #else 1712 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1713 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1714 #endif 1715 #endif 1716 break; 1717 } 1718 #endif 1719 1720 #ifdef ENABLE_SCO_OVER_PCM 1721 /* fall through */ 1722 1723 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1724 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1725 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1726 log_info("BCM: Config PCM interface for I2S"); 1727 #ifdef ENABLE_BCM_PCM_WBS 1728 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1729 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1730 #else 1731 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1732 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1733 #endif 1734 break; 1735 } 1736 #endif 1737 #endif 1738 1739 #ifdef ENABLE_BLE 1740 /* fall through */ 1741 1742 // LE INIT 1743 case HCI_INIT_LE_READ_BUFFER_SIZE: 1744 if (hci_le_supported()){ 1745 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1746 hci_send_cmd(&hci_le_read_buffer_size); 1747 break; 1748 } 1749 1750 /* fall through */ 1751 1752 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1753 // skip write le host if not supported (e.g. on LE only EM9301) 1754 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1755 // LE Supported Host = 1, Simultaneous Host = 0 1756 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1757 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1758 break; 1759 } 1760 1761 /* fall through */ 1762 1763 case HCI_INIT_LE_SET_EVENT_MASK: 1764 if (hci_le_supported()){ 1765 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1766 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1767 break; 1768 } 1769 #endif 1770 1771 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1772 /* fall through */ 1773 1774 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1775 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1776 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1777 hci_send_cmd(&hci_le_read_maximum_data_length); 1778 break; 1779 } 1780 1781 /* fall through */ 1782 1783 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1784 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1785 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1786 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1787 break; 1788 } 1789 #endif 1790 1791 #ifdef ENABLE_LE_CENTRAL 1792 /* fall through */ 1793 1794 case HCI_INIT_READ_WHITE_LIST_SIZE: 1795 if (hci_le_supported()){ 1796 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1797 hci_send_cmd(&hci_le_read_white_list_size); 1798 break; 1799 } 1800 1801 /* fall through */ 1802 1803 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1804 if (hci_le_supported()){ 1805 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1806 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); 1807 break; 1808 } 1809 #endif 1810 1811 /* fall through */ 1812 1813 case HCI_INIT_DONE: 1814 hci_stack->substate = HCI_INIT_DONE; 1815 #ifdef ENABLE_CLASSIC 1816 // init sequence complete, check if GAP Tasks are completed 1817 if (hci_stack->gap_tasks != 0) { 1818 hci_run_gap_tasks_classic(); 1819 break; 1820 } 1821 #endif 1822 hci_init_done(); 1823 break; 1824 1825 default: 1826 return; 1827 } 1828 } 1829 1830 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1831 bool command_completed = false; 1832 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1833 uint16_t opcode = little_endian_read_16(packet,3); 1834 if (opcode == hci_stack->last_cmd_opcode){ 1835 command_completed = true; 1836 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1837 } else { 1838 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1839 } 1840 } 1841 1842 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1843 uint8_t status = packet[2]; 1844 uint16_t opcode = little_endian_read_16(packet,4); 1845 if (opcode == hci_stack->last_cmd_opcode){ 1846 if (status){ 1847 command_completed = true; 1848 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1849 } else { 1850 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1851 } 1852 } else { 1853 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1854 } 1855 } 1856 #ifndef HAVE_HOST_CONTROLLER_API 1857 // Vendor == CSR 1858 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1859 // TODO: track actual command 1860 command_completed = true; 1861 } 1862 1863 // Vendor == Toshiba 1864 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1865 // TODO: track actual command 1866 command_completed = true; 1867 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1868 hci_stack->num_cmd_packets = 1; 1869 } 1870 #endif 1871 1872 return command_completed; 1873 } 1874 1875 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1876 1877 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1878 1879 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1880 1881 #ifndef HAVE_HOST_CONTROLLER_API 1882 1883 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1884 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1885 // 1886 // HCI Reset 1887 // Timeout 100 ms 1888 // HCI Reset 1889 // Command Complete Reset 1890 // HCI Read Local Version Information 1891 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1892 // hang... 1893 // 1894 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1895 if (!command_completed 1896 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1897 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1898 1899 uint16_t opcode = little_endian_read_16(packet,3); 1900 if (opcode == hci_reset.opcode){ 1901 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1902 return; 1903 } 1904 } 1905 1906 // CSR & H5 1907 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1908 if (!command_completed 1909 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1910 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1911 1912 uint16_t opcode = little_endian_read_16(packet,3); 1913 if (opcode == hci_reset.opcode){ 1914 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1915 return; 1916 } 1917 } 1918 1919 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1920 // fix: Correct substate and behave as command below 1921 if (command_completed){ 1922 switch (hci_stack->substate){ 1923 case HCI_INIT_SEND_RESET: 1924 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1925 break; 1926 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1927 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1928 break; 1929 default: 1930 break; 1931 } 1932 } 1933 1934 #endif 1935 1936 if (!command_completed) return; 1937 1938 bool need_baud_change = false; 1939 bool need_addr_change = false; 1940 1941 #ifndef HAVE_HOST_CONTROLLER_API 1942 need_baud_change = hci_stack->config 1943 && hci_stack->chipset 1944 && hci_stack->chipset->set_baudrate_command 1945 && hci_stack->hci_transport->set_baudrate 1946 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1947 1948 need_addr_change = hci_stack->custom_bd_addr_set 1949 && hci_stack->chipset 1950 && hci_stack->chipset->set_bd_addr_command; 1951 #endif 1952 1953 switch(hci_stack->substate){ 1954 1955 #ifndef HAVE_HOST_CONTROLLER_API 1956 case HCI_INIT_SEND_RESET: 1957 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1958 // fix: just correct substate and behave as command below 1959 1960 /* fall through */ 1961 #endif 1962 1963 case HCI_INIT_W4_SEND_RESET: 1964 btstack_run_loop_remove_timer(&hci_stack->timeout); 1965 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1966 return; 1967 1968 #ifndef HAVE_HOST_CONTROLLER_API 1969 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1970 // for STLC2500D, baud rate change already happened. 1971 // for others, baud rate gets changed now 1972 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1973 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1974 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1975 hci_stack->hci_transport->set_baudrate(baud_rate); 1976 } 1977 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1978 return; 1979 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1980 btstack_run_loop_remove_timer(&hci_stack->timeout); 1981 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1982 return; 1983 case HCI_INIT_W4_CUSTOM_INIT: 1984 // repeat custom init 1985 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1986 return; 1987 #endif 1988 1989 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1990 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1991 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1992 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1993 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1994 return; 1995 } 1996 if (need_addr_change){ 1997 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1998 return; 1999 } 2000 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2001 return; 2002 #ifndef HAVE_HOST_CONTROLLER_API 2003 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2004 if (need_baud_change){ 2005 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2006 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2007 hci_stack->hci_transport->set_baudrate(baud_rate); 2008 } 2009 if (need_addr_change){ 2010 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2011 return; 2012 } 2013 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2014 return; 2015 case HCI_INIT_W4_SET_BD_ADDR: 2016 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2017 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2018 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2019 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2020 return; 2021 } 2022 // skipping st warm boot 2023 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2024 return; 2025 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2026 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2027 return; 2028 #endif 2029 2030 case HCI_INIT_DONE: 2031 // set state if we came here by fall through 2032 hci_stack->substate = HCI_INIT_DONE; 2033 return; 2034 2035 default: 2036 break; 2037 } 2038 hci_initializing_next_state(); 2039 } 2040 2041 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2042 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2043 bd_addr_t bd_address; 2044 (void)memcpy(&bd_address, conn->address, 6); 2045 2046 #ifdef ENABLE_CLASSIC 2047 // cache needed data 2048 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2049 #endif 2050 2051 // connection failed, remove entry 2052 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2053 btstack_memory_hci_connection_free( conn ); 2054 2055 #ifdef ENABLE_CLASSIC 2056 // notify client if dedicated bonding 2057 if (notify_dedicated_bonding_failed){ 2058 log_info("hci notify_dedicated_bonding_failed"); 2059 hci_emit_dedicated_bonding_result(bd_address, status); 2060 } 2061 2062 // if authentication error, also delete link key 2063 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2064 gap_drop_link_key_for_bd_addr(bd_address); 2065 } 2066 #else 2067 UNUSED(status); 2068 #endif 2069 } 2070 2071 #ifdef ENABLE_CLASSIC 2072 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2073 // SSP Controller 2074 if (features[6] & (1 << 3)){ 2075 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2076 } 2077 // eSCO 2078 if (features[3] & (1<<7)){ 2079 conn->remote_supported_features[0] |= 1; 2080 } 2081 // Extended features 2082 if (features[7] & (1<<7)){ 2083 conn->remote_supported_features[0] |= 2; 2084 } 2085 } 2086 2087 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2088 // SSP Host 2089 if (features[0] & (1 << 0)){ 2090 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2091 } 2092 // SC Host 2093 if (features[0] & (1 << 3)){ 2094 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2095 } 2096 } 2097 2098 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2099 // SC Controller 2100 if (features[1] & (1 << 0)){ 2101 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2102 } 2103 } 2104 2105 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2106 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2107 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2108 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2109 if (conn->bonding_flags & BONDING_DEDICATED){ 2110 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2111 } 2112 } 2113 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2114 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2115 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2116 } 2117 2118 #endif 2119 2120 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2121 // handle BT initialization 2122 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2123 hci_initializing_event_handler(packet, size); 2124 } 2125 2126 // help with BT sleep 2127 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2128 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2129 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2130 hci_initializing_next_state(); 2131 } 2132 } 2133 2134 #ifdef ENABLE_CLASSIC 2135 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2136 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2137 conn->encryption_key_size = encryption_key_size; 2138 2139 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2140 conn->requested_security_level = LEVEL_0; 2141 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2142 return; 2143 } 2144 2145 // Request remote features if not already done 2146 hci_trigger_remote_features_for_connection(conn); 2147 2148 // Request Authentication if not already done 2149 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2150 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2151 } 2152 #endif 2153 2154 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2155 UNUSED(size); 2156 2157 uint16_t manufacturer; 2158 #ifdef ENABLE_CLASSIC 2159 hci_con_handle_t handle; 2160 hci_connection_t * conn; 2161 uint8_t status; 2162 #endif 2163 // get num cmd packets - limit to 1 to reduce complexity 2164 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2165 2166 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2167 switch (opcode){ 2168 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2169 if (packet[5]) break; 2170 // terminate, name 248 chars 2171 packet[6+248] = 0; 2172 log_info("local name: %s", &packet[6]); 2173 break; 2174 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2175 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2176 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2177 uint16_t acl_len = little_endian_read_16(packet, 6); 2178 uint16_t sco_len = packet[8]; 2179 2180 // determine usable ACL/SCO payload size 2181 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2182 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2183 2184 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2185 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2186 2187 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2188 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2189 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2190 } 2191 break; 2192 case HCI_OPCODE_HCI_READ_RSSI: 2193 if (packet[5] == ERROR_CODE_SUCCESS){ 2194 uint8_t event[5]; 2195 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2196 event[1] = 3; 2197 (void)memcpy(&event[2], &packet[6], 3); 2198 hci_emit_event(event, sizeof(event), 1); 2199 } 2200 break; 2201 #ifdef ENABLE_BLE 2202 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2203 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2204 hci_stack->le_acl_packets_total_num = packet[8]; 2205 // determine usable ACL payload size 2206 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2207 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2208 } 2209 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2210 break; 2211 #endif 2212 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2213 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2214 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2215 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2216 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); 2217 break; 2218 #endif 2219 #ifdef ENABLE_LE_CENTRAL 2220 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2221 hci_stack->le_whitelist_capacity = packet[6]; 2222 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2223 break; 2224 #endif 2225 case HCI_OPCODE_HCI_READ_BD_ADDR: 2226 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2227 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)); 2228 #ifdef ENABLE_CLASSIC 2229 if (hci_stack->link_key_db){ 2230 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2231 } 2232 #endif 2233 break; 2234 #ifdef ENABLE_CLASSIC 2235 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2236 hci_emit_discoverable_enabled(hci_stack->discoverable); 2237 break; 2238 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2239 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2240 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2241 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2242 hci_emit_event(event, sizeof(event), 1); 2243 } 2244 break; 2245 #endif 2246 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2247 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2248 2249 #ifdef ENABLE_CLASSIC 2250 // determine usable ACL packet types based on host buffer size and supported features 2251 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2252 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2253 #endif 2254 // Classic/LE 2255 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2256 break; 2257 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2258 manufacturer = little_endian_read_16(packet, 10); 2259 // map Cypress to Broadcom 2260 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2261 log_info("Treat Cypress as Broadcom"); 2262 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2263 little_endian_store_16(packet, 10, manufacturer); 2264 } 2265 hci_stack->manufacturer = manufacturer; 2266 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2267 break; 2268 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2269 hci_stack->local_supported_commands[0] = 2270 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2271 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2272 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2273 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2274 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2275 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2276 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2277 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2278 hci_stack->local_supported_commands[1] = 2279 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2280 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2281 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2282 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2283 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2284 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2285 break; 2286 #ifdef ENABLE_CLASSIC 2287 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2288 if (packet[5]) return; 2289 hci_stack->synchronous_flow_control_enabled = 1; 2290 break; 2291 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2292 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2293 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2294 conn = hci_connection_for_handle(handle); 2295 if (conn != NULL) { 2296 uint8_t key_size = 0; 2297 if (status == 0){ 2298 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2299 log_info("Handle %04x key Size: %u", handle, key_size); 2300 } else { 2301 key_size = 1; 2302 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2303 } 2304 hci_handle_read_encryption_key_size_complete(conn, key_size); 2305 } 2306 break; 2307 // assert pairing complete event is emitted. 2308 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2309 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2310 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2311 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2312 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2313 // lookup connection by gap pairing addr 2314 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2315 if (conn == NULL) break; 2316 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2317 break; 2318 2319 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2320 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2321 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2322 uint8_t event[67]; 2323 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2324 event[1] = 65; 2325 (void)memset(&event[2], 0, 65); 2326 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2327 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2328 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2329 event[2] = 3; 2330 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2331 } else { 2332 event[2] = 1; 2333 } 2334 } 2335 hci_emit_event(event, sizeof(event), 0); 2336 break; 2337 } 2338 2339 // note: only needed if user does not provide OOB data 2340 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2341 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2342 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2343 if (conn == NULL) break; 2344 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2345 break; 2346 #endif 2347 #endif 2348 default: 2349 break; 2350 } 2351 } 2352 2353 #ifdef ENABLE_BLE 2354 static void event_handle_le_connection_complete(const uint8_t * packet){ 2355 bd_addr_t addr; 2356 bd_addr_type_t addr_type; 2357 hci_connection_t * conn; 2358 2359 // Connection management 2360 reverse_bd_addr(&packet[8], addr); 2361 addr_type = (bd_addr_type_t)packet[7]; 2362 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2363 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2364 2365 #ifdef ENABLE_LE_CENTRAL 2366 // handle error: error is reported only to the initiator -> outgoing connection 2367 if (packet[3]){ 2368 2369 // handle cancelled outgoing connection 2370 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2371 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2372 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2373 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2374 // reset state 2375 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2376 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2377 // get outgoing connection conn struct for direct connect 2378 conn = gap_get_outgoing_connection(); 2379 } 2380 2381 // outgoing le connection establishment is done 2382 if (conn){ 2383 // remove entry 2384 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2385 btstack_memory_hci_connection_free( conn ); 2386 } 2387 return; 2388 } 2389 #endif 2390 2391 // on success, both hosts receive connection complete event 2392 if (packet[6] == HCI_ROLE_MASTER){ 2393 #ifdef ENABLE_LE_CENTRAL 2394 // if we're master on an le connection, it was an outgoing connection and we're done with it 2395 // note: no hci_connection_t object exists yet for connect with whitelist 2396 if (hci_is_le_connection_type(addr_type)){ 2397 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2398 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2399 } 2400 #endif 2401 } else { 2402 #ifdef ENABLE_LE_PERIPHERAL 2403 // if we're slave, it was an incoming connection, advertisements have stopped 2404 hci_stack->le_advertisements_active = false; 2405 #endif 2406 } 2407 2408 // LE connections are auto-accepted, so just create a connection if there isn't one already 2409 if (!conn){ 2410 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2411 } 2412 2413 // no memory, sorry. 2414 if (!conn){ 2415 return; 2416 } 2417 2418 conn->state = OPEN; 2419 conn->role = packet[6]; 2420 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2421 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2422 2423 #ifdef ENABLE_LE_PERIPHERAL 2424 if (packet[6] == HCI_ROLE_SLAVE){ 2425 hci_update_advertisements_enabled_for_current_roles(); 2426 } 2427 #endif 2428 2429 // init unenhanced att bearer mtu 2430 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2431 conn->att_connection.mtu_exchanged = false; 2432 2433 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2434 2435 // restart timer 2436 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2437 // btstack_run_loop_add_timer(&conn->timeout); 2438 2439 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2440 2441 hci_emit_nr_connections_changed(); 2442 } 2443 #endif 2444 2445 #ifdef ENABLE_CLASSIC 2446 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){ 2447 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2448 // LEVEL_4 is tested by l2cap 2449 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2450 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2451 if (level >= LEVEL_3){ 2452 // MITM not possible without keyboard or display 2453 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2454 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2455 2456 // MITM possible if one side has keyboard and the other has keyboard or display 2457 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2458 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2459 2460 // MITM not possible if one side has only display and other side has no keyboard 2461 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2462 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2463 } 2464 // LEVEL 2 requires SSP, which is a given 2465 return true; 2466 } 2467 2468 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2469 uint16_t i; 2470 for (i=0; i < size ; i++){ 2471 if (data[i] != 0) { 2472 return false; 2473 } 2474 } 2475 return true; 2476 } 2477 2478 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2479 // get requested security level 2480 gap_security_level_t requested_security_level = conn->requested_security_level; 2481 if (hci_stack->gap_secure_connections_only_mode){ 2482 requested_security_level = LEVEL_4; 2483 } 2484 2485 // assess security: LEVEL 4 requires SC 2486 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2487 if ((requested_security_level == LEVEL_4) && 2488 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2489 !hci_remote_sc_enabled(conn)){ 2490 log_info("Level 4 required, but SC not supported -> abort"); 2491 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2492 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2493 return; 2494 } 2495 2496 // assess security based on io capabilities 2497 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2498 // responder: fully validate io caps of both sides as well as OOB data 2499 bool security_possible = false; 2500 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2501 2502 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2503 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2504 // so we merge the OOB data availability 2505 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2506 if (conn->classic_oob_c_192 != NULL){ 2507 have_oob_data |= 1; 2508 } 2509 if (conn->classic_oob_c_256 != NULL){ 2510 have_oob_data |= 2; 2511 } 2512 // for up to Level 3, either P-192 as well as P-256 will do 2513 // 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 2514 // if remote does not SC, we should not receive P-256 data either 2515 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2516 security_possible = true; 2517 } 2518 // for Level 4, P-256 is needed 2519 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2520 security_possible = true; 2521 } 2522 #endif 2523 2524 if (security_possible == false){ 2525 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2526 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2527 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2528 return; 2529 } 2530 } else { 2531 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2532 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2533 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2534 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2535 log_info("Level 3+ required, but no input/output -> abort"); 2536 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2537 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2538 return; 2539 } 2540 #endif 2541 #endif 2542 } 2543 2544 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2545 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2546 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2547 } else { 2548 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2549 } 2550 #endif 2551 } 2552 2553 #endif 2554 2555 static void event_handler(uint8_t *packet, uint16_t size){ 2556 2557 uint16_t event_length = packet[1]; 2558 2559 // assert packet is complete 2560 if (size != (event_length + 2u)){ 2561 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2562 return; 2563 } 2564 2565 bd_addr_type_t addr_type; 2566 hci_con_handle_t handle; 2567 hci_connection_t * conn; 2568 int i; 2569 int create_connection_cmd; 2570 2571 #ifdef ENABLE_CLASSIC 2572 hci_link_type_t link_type; 2573 bd_addr_t addr; 2574 #endif 2575 2576 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2577 2578 switch (hci_event_packet_get_type(packet)) { 2579 2580 case HCI_EVENT_COMMAND_COMPLETE: 2581 handle_command_complete_event(packet, size); 2582 break; 2583 2584 case HCI_EVENT_COMMAND_STATUS: 2585 // get num cmd packets - limit to 1 to reduce complexity 2586 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2587 2588 // check command status to detected failed outgoing connections 2589 create_connection_cmd = 0; 2590 #ifdef ENABLE_CLASSIC 2591 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2592 create_connection_cmd = 1; 2593 } 2594 #endif 2595 #ifdef ENABLE_LE_CENTRAL 2596 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2597 create_connection_cmd = 1; 2598 } 2599 #endif 2600 if (create_connection_cmd) { 2601 uint8_t status = hci_event_command_status_get_status(packet); 2602 addr_type = hci_stack->outgoing_addr_type; 2603 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2604 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); 2605 2606 // reset outgoing address info 2607 memset(hci_stack->outgoing_addr, 0, 6); 2608 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2609 2610 // on error 2611 if (status != ERROR_CODE_SUCCESS){ 2612 #ifdef ENABLE_LE_CENTRAL 2613 if (hci_is_le_connection_type(addr_type)){ 2614 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2615 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2616 } 2617 #endif 2618 // error => outgoing connection failed 2619 if (conn != NULL){ 2620 hci_handle_connection_failed(conn, status); 2621 } 2622 } 2623 } 2624 2625 #ifdef ENABLE_CLASSIC 2626 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2627 uint8_t status = hci_event_command_status_get_status(packet); 2628 log_info("command status (inquiry), status %x", status); 2629 if (status == ERROR_CODE_SUCCESS) { 2630 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2631 } else { 2632 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2633 } 2634 } 2635 #endif 2636 break; 2637 2638 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2639 if (size < 3) return; 2640 uint16_t num_handles = packet[2]; 2641 if (size != (3u + num_handles * 4u)) return; 2642 uint16_t offset = 3; 2643 for (i=0; i<num_handles;i++){ 2644 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2645 offset += 2u; 2646 uint16_t num_packets = little_endian_read_16(packet, offset); 2647 offset += 2u; 2648 2649 conn = hci_connection_for_handle(handle); 2650 if (!conn){ 2651 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2652 continue; 2653 } 2654 2655 if (conn->num_packets_sent >= num_packets){ 2656 conn->num_packets_sent -= num_packets; 2657 } else { 2658 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2659 conn->num_packets_sent = 0; 2660 } 2661 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2662 2663 #ifdef ENABLE_CLASSIC 2664 // For SCO, we do the can_send_now_check here 2665 hci_notify_if_sco_can_send_now(); 2666 #endif 2667 } 2668 break; 2669 } 2670 2671 #ifdef ENABLE_CLASSIC 2672 case HCI_EVENT_INQUIRY_COMPLETE: 2673 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2674 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2675 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2676 hci_emit_event(event, sizeof(event), 1); 2677 } 2678 break; 2679 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2680 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2681 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2682 } 2683 break; 2684 case HCI_EVENT_CONNECTION_REQUEST: 2685 reverse_bd_addr(&packet[2], addr); 2686 link_type = (hci_link_type_t) packet[11]; 2687 2688 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2689 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2690 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2691 bd_addr_copy(hci_stack->decline_addr, addr); 2692 break; 2693 } 2694 2695 if (hci_stack->gap_classic_accept_callback != NULL){ 2696 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2697 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2698 bd_addr_copy(hci_stack->decline_addr, addr); 2699 break; 2700 } 2701 } 2702 2703 // TODO: eval COD 8-10 2704 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2705 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2706 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2707 if (!conn) { 2708 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2709 } 2710 if (!conn) { 2711 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2712 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2713 bd_addr_copy(hci_stack->decline_addr, addr); 2714 break; 2715 } 2716 conn->role = HCI_ROLE_SLAVE; 2717 conn->state = RECEIVED_CONNECTION_REQUEST; 2718 // store info about eSCO 2719 if (link_type == HCI_LINK_TYPE_ESCO){ 2720 conn->remote_supported_features[0] |= 1; 2721 } 2722 hci_run(); 2723 break; 2724 2725 case HCI_EVENT_CONNECTION_COMPLETE: 2726 // Connection management 2727 reverse_bd_addr(&packet[5], addr); 2728 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2729 addr_type = BD_ADDR_TYPE_ACL; 2730 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2731 if (conn) { 2732 if (!packet[2]){ 2733 conn->state = OPEN; 2734 conn->con_handle = little_endian_read_16(packet, 3); 2735 2736 // queue set supervision timeout if we're master 2737 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2738 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2739 } 2740 2741 // restart timer 2742 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2743 btstack_run_loop_add_timer(&conn->timeout); 2744 2745 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2746 2747 hci_emit_nr_connections_changed(); 2748 } else { 2749 // connection failed 2750 hci_handle_connection_failed(conn, packet[2]); 2751 } 2752 } 2753 break; 2754 2755 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2756 reverse_bd_addr(&packet[5], addr); 2757 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2758 if (packet[2]){ 2759 // connection failed 2760 break; 2761 } 2762 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2763 if (!conn) { 2764 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2765 } 2766 if (!conn) { 2767 break; 2768 } 2769 conn->state = OPEN; 2770 conn->con_handle = little_endian_read_16(packet, 3); 2771 2772 #ifdef ENABLE_SCO_OVER_HCI 2773 // update SCO 2774 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2775 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2776 } 2777 // trigger can send now 2778 if (hci_have_usb_transport()){ 2779 hci_stack->sco_can_send_now = true; 2780 } 2781 #endif 2782 #ifdef HAVE_SCO_TRANSPORT 2783 // configure sco transport 2784 if (hci_stack->sco_transport != NULL){ 2785 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2786 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2787 } 2788 #endif 2789 break; 2790 2791 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2792 handle = little_endian_read_16(packet, 3); 2793 conn = hci_connection_for_handle(handle); 2794 if (!conn) break; 2795 if (!packet[2]){ 2796 const uint8_t * features = &packet[5]; 2797 hci_handle_remote_features_page_0(conn, features); 2798 2799 // read extended features if possible 2800 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2801 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2802 break; 2803 } 2804 } 2805 hci_handle_remote_features_received(conn); 2806 break; 2807 2808 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2809 handle = little_endian_read_16(packet, 3); 2810 conn = hci_connection_for_handle(handle); 2811 if (!conn) break; 2812 // status = ok, page = 1 2813 if (!packet[2]) { 2814 uint8_t page_number = packet[5]; 2815 uint8_t maximum_page_number = packet[6]; 2816 const uint8_t * features = &packet[7]; 2817 bool done = false; 2818 switch (page_number){ 2819 case 1: 2820 hci_handle_remote_features_page_1(conn, features); 2821 if (maximum_page_number >= 2){ 2822 // get Secure Connections (Controller) from Page 2 if available 2823 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2824 } else { 2825 // otherwise, assume SC (Controller) == SC (Host) 2826 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2827 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2828 } 2829 done = true; 2830 } 2831 break; 2832 case 2: 2833 hci_handle_remote_features_page_2(conn, features); 2834 done = true; 2835 break; 2836 default: 2837 break; 2838 } 2839 if (!done) break; 2840 } 2841 hci_handle_remote_features_received(conn); 2842 break; 2843 2844 case HCI_EVENT_LINK_KEY_REQUEST: 2845 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2846 hci_event_link_key_request_get_bd_addr(packet, addr); 2847 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2848 if (!conn) break; 2849 2850 // lookup link key in db if not cached 2851 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2852 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2853 } 2854 2855 // response sent by hci_run() 2856 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2857 #endif 2858 break; 2859 2860 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2861 hci_event_link_key_request_get_bd_addr(packet, addr); 2862 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2863 if (!conn) break; 2864 2865 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2866 2867 // CVE-2020-26555: ignore NULL link key 2868 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2869 if (btstack_is_null(&packet[8], 16)) break; 2870 2871 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2872 // Change Connection Encryption keeps link key type 2873 if (link_key_type != CHANGED_COMBINATION_KEY){ 2874 conn->link_key_type = link_key_type; 2875 } 2876 2877 // cache link key. link keys stored in little-endian format for legacy reasons 2878 memcpy(&conn->link_key, &packet[8], 16); 2879 2880 // only store link key: 2881 // - if bondable enabled 2882 if (hci_stack->bondable == false) break; 2883 // - if security level sufficient 2884 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2885 // - for SSP, also check if remote side requested bonding as well 2886 if (conn->link_key_type != COMBINATION_KEY){ 2887 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2888 if (!remote_bonding){ 2889 break; 2890 } 2891 } 2892 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2893 break; 2894 } 2895 2896 case HCI_EVENT_PIN_CODE_REQUEST: 2897 hci_event_pin_code_request_get_bd_addr(packet, addr); 2898 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2899 if (!conn) break; 2900 2901 hci_pairing_started(conn, false); 2902 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2903 if (!hci_stack->bondable ){ 2904 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2905 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2906 hci_run(); 2907 return; 2908 } 2909 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2910 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2911 log_info("Level 4 required, but SC not supported -> abort"); 2912 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2913 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2914 hci_run(); 2915 return; 2916 } 2917 break; 2918 2919 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2920 hci_event_io_capability_response_get_bd_addr(packet, addr); 2921 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2922 if (!conn) break; 2923 2924 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2925 hci_pairing_started(conn, true); 2926 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2927 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2928 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2929 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2930 #endif 2931 break; 2932 2933 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2934 hci_event_io_capability_response_get_bd_addr(packet, addr); 2935 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2936 if (!conn) break; 2937 2938 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2939 hci_connection_timestamp(conn); 2940 hci_pairing_started(conn, true); 2941 break; 2942 2943 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2944 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2945 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2946 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2947 if (!conn) break; 2948 2949 hci_connection_timestamp(conn); 2950 2951 hci_pairing_started(conn, true); 2952 2953 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2954 break; 2955 #endif 2956 2957 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2958 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2959 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2960 if (!conn) break; 2961 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2962 if (hci_stack->ssp_auto_accept){ 2963 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2964 }; 2965 } else { 2966 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2967 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2968 // don't forward event to app 2969 hci_run(); 2970 return; 2971 } 2972 break; 2973 2974 case HCI_EVENT_USER_PASSKEY_REQUEST: 2975 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2976 if (hci_stack->ssp_auto_accept){ 2977 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2978 }; 2979 break; 2980 2981 case HCI_EVENT_MODE_CHANGE: 2982 handle = hci_event_mode_change_get_handle(packet); 2983 conn = hci_connection_for_handle(handle); 2984 if (!conn) break; 2985 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2986 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2987 break; 2988 #endif 2989 2990 case HCI_EVENT_ENCRYPTION_CHANGE: 2991 handle = hci_event_encryption_change_get_connection_handle(packet); 2992 conn = hci_connection_for_handle(handle); 2993 if (!conn) break; 2994 if (hci_event_encryption_change_get_status(packet) == 0u) { 2995 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2996 if (encryption_enabled){ 2997 if (hci_is_le_connection(conn)){ 2998 // For LE, we accept connection as encrypted 2999 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3000 } 3001 #ifdef ENABLE_CLASSIC 3002 else { 3003 3004 // dedicated bonding: send result and disconnect 3005 if (conn->bonding_flags & BONDING_DEDICATED){ 3006 conn->bonding_flags &= ~BONDING_DEDICATED; 3007 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3008 conn->bonding_status = packet[2]; 3009 break; 3010 } 3011 3012 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3013 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3014 bool connected_uses_aes_ccm = encryption_enabled == 2; 3015 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3016 log_info("SC during pairing, but only E0 now -> abort"); 3017 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3018 break; 3019 } 3020 3021 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3022 if (connected_uses_aes_ccm){ 3023 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3024 } 3025 3026 #ifdef ENABLE_TESTING_SUPPORT 3027 // work around for issue with PTS dongle 3028 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3029 #endif 3030 3031 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3032 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3033 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3034 } else { 3035 // if not, pretend everything is perfect 3036 hci_handle_read_encryption_key_size_complete(conn, 16); 3037 } 3038 } 3039 #endif 3040 } else { 3041 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3042 } 3043 } 3044 3045 break; 3046 3047 #ifdef ENABLE_CLASSIC 3048 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3049 handle = hci_event_authentication_complete_get_connection_handle(packet); 3050 conn = hci_connection_for_handle(handle); 3051 if (!conn) break; 3052 3053 // clear authentication active flag 3054 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3055 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3056 3057 // authenticated only if auth status == 0 3058 if (hci_event_authentication_complete_get_status(packet) == 0){ 3059 // authenticated 3060 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3061 3062 // If not already encrypted, start encryption 3063 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3064 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3065 break; 3066 } 3067 } 3068 3069 // emit updated security level 3070 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3071 break; 3072 3073 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3074 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3075 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3076 if (!conn) break; 3077 3078 // treat successfully paired connection as authenticated 3079 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3080 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3081 } 3082 3083 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3084 break; 3085 #endif 3086 3087 // HCI_EVENT_DISCONNECTION_COMPLETE 3088 // has been split, to first notify stack before shutting connection down 3089 // see end of function, too. 3090 case HCI_EVENT_DISCONNECTION_COMPLETE: 3091 if (packet[2]) break; // status != 0 3092 handle = little_endian_read_16(packet, 3); 3093 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3094 if (hci_stack->acl_fragmentation_total_size > 0u) { 3095 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3096 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3097 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3098 hci_stack->acl_fragmentation_total_size = 0; 3099 hci_stack->acl_fragmentation_pos = 0; 3100 if (release_buffer){ 3101 hci_release_packet_buffer(); 3102 } 3103 } 3104 } 3105 3106 conn = hci_connection_for_handle(handle); 3107 if (!conn) break; 3108 #ifdef ENABLE_CLASSIC 3109 // pairing failed if it was ongoing 3110 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3111 #endif 3112 3113 // emit dedicatd bonding event 3114 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3115 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3116 } 3117 3118 // mark connection for shutdown, stop timers, reset state 3119 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3120 hci_connection_stop_timer(conn); 3121 hci_connection_init(conn); 3122 3123 #ifdef ENABLE_BLE 3124 #ifdef ENABLE_LE_PERIPHERAL 3125 // re-enable advertisements for le connections if active 3126 if (hci_is_le_connection(conn)){ 3127 hci_update_advertisements_enabled_for_current_roles(); 3128 } 3129 #endif 3130 #endif 3131 break; 3132 3133 case HCI_EVENT_HARDWARE_ERROR: 3134 log_error("Hardware Error: 0x%02x", packet[2]); 3135 if (hci_stack->hardware_error_callback){ 3136 (*hci_stack->hardware_error_callback)(packet[2]); 3137 } else { 3138 // if no special requests, just reboot stack 3139 hci_power_control_off(); 3140 hci_power_control_on(); 3141 } 3142 break; 3143 3144 #ifdef ENABLE_CLASSIC 3145 case HCI_EVENT_ROLE_CHANGE: 3146 if (packet[2]) break; // status != 0 3147 reverse_bd_addr(&packet[3], addr); 3148 addr_type = BD_ADDR_TYPE_ACL; 3149 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3150 if (!conn) break; 3151 conn->role = packet[9]; 3152 break; 3153 #endif 3154 3155 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3156 // release packet buffer only for asynchronous transport and if there are not further fragements 3157 if (hci_transport_synchronous()) { 3158 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3159 return; // instead of break: to avoid re-entering hci_run() 3160 } 3161 hci_stack->acl_fragmentation_tx_active = 0; 3162 if (hci_stack->acl_fragmentation_total_size) break; 3163 hci_release_packet_buffer(); 3164 3165 // L2CAP receives this event via the hci_emit_event below 3166 3167 #ifdef ENABLE_CLASSIC 3168 // For SCO, we do the can_send_now_check here 3169 hci_notify_if_sco_can_send_now(); 3170 #endif 3171 break; 3172 3173 #ifdef ENABLE_CLASSIC 3174 case HCI_EVENT_SCO_CAN_SEND_NOW: 3175 // For SCO, we do the can_send_now_check here 3176 hci_stack->sco_can_send_now = true; 3177 hci_notify_if_sco_can_send_now(); 3178 return; 3179 3180 // explode inquriy results for easier consumption 3181 case HCI_EVENT_INQUIRY_RESULT: 3182 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3183 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3184 gap_inquiry_explode(packet, size); 3185 break; 3186 #endif 3187 3188 #ifdef ENABLE_BLE 3189 case HCI_EVENT_LE_META: 3190 switch (packet[2]){ 3191 #ifdef ENABLE_LE_CENTRAL 3192 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3193 // log_info("advertising report received"); 3194 if (!hci_stack->le_scanning_enabled) break; 3195 le_handle_advertisement_report(packet, size); 3196 break; 3197 #endif 3198 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3199 event_handle_le_connection_complete(packet); 3200 break; 3201 3202 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3203 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3204 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3205 conn = hci_connection_for_handle(handle); 3206 if (!conn) break; 3207 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3208 break; 3209 3210 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3211 // connection 3212 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3213 conn = hci_connection_for_handle(handle); 3214 if (conn) { 3215 // read arguments 3216 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3217 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3218 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3219 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3220 3221 // validate against current connection parameter range 3222 le_connection_parameter_range_t existing_range; 3223 gap_get_connection_parameter_range(&existing_range); 3224 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3225 if (update_parameter){ 3226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3227 conn->le_conn_interval_min = le_conn_interval_min; 3228 conn->le_conn_interval_max = le_conn_interval_max; 3229 conn->le_conn_latency = le_conn_latency; 3230 conn->le_supervision_timeout = le_supervision_timeout; 3231 } else { 3232 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3233 } 3234 } 3235 break; 3236 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3237 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3238 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3239 conn = hci_connection_for_handle(handle); 3240 if (conn) { 3241 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3242 } 3243 break; 3244 #endif 3245 default: 3246 break; 3247 } 3248 break; 3249 #endif 3250 case HCI_EVENT_VENDOR_SPECIFIC: 3251 // Vendor specific commands often create vendor specific event instead of num completed packets 3252 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3253 switch (hci_stack->manufacturer){ 3254 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3255 hci_stack->num_cmd_packets = 1; 3256 break; 3257 default: 3258 break; 3259 } 3260 break; 3261 default: 3262 break; 3263 } 3264 3265 handle_event_for_current_stack_state(packet, size); 3266 3267 // notify upper stack 3268 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3269 3270 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3271 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3272 handle = little_endian_read_16(packet, 3); 3273 hci_connection_t * aConn = hci_connection_for_handle(handle); 3274 // discard connection if app did not trigger a reconnect in the event handler 3275 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3276 hci_shutdown_connection(aConn); 3277 } 3278 } 3279 3280 // execute main loop 3281 hci_run(); 3282 } 3283 3284 #ifdef ENABLE_CLASSIC 3285 3286 #ifdef ENABLE_SCO_OVER_HCI 3287 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3288 static void sco_schedule_tx(hci_connection_t * conn); 3289 3290 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3291 log_debug("SCO TX Timeout"); 3292 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3293 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3294 if (!conn) return; 3295 3296 // trigger send 3297 conn->sco_tx_ready = 1; 3298 // extra packet if CVSD but SCO buffer is too short 3299 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3300 conn->sco_tx_ready++; 3301 } 3302 hci_notify_if_sco_can_send_now(); 3303 } 3304 3305 3306 #define SCO_TX_AFTER_RX_MS (6) 3307 3308 static void sco_schedule_tx(hci_connection_t * conn){ 3309 3310 uint32_t now = btstack_run_loop_get_time_ms(); 3311 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3312 int time_delta_ms = sco_tx_ms - now; 3313 3314 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3315 3316 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3317 btstack_run_loop_remove_timer(timer); 3318 btstack_run_loop_set_timer(timer, time_delta_ms); 3319 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3320 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3321 btstack_run_loop_add_timer(timer); 3322 } 3323 #endif 3324 3325 static void sco_handler(uint8_t * packet, uint16_t size){ 3326 // lookup connection struct 3327 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3328 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3329 if (!conn) return; 3330 3331 #ifdef ENABLE_SCO_OVER_HCI 3332 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3333 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3334 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3335 packet[2] = 0x3c; 3336 memmove(&packet[3], &packet[23], 63); 3337 size = 63; 3338 } 3339 } 3340 3341 if (hci_have_usb_transport()){ 3342 // Nothing to do 3343 } else { 3344 // 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); 3345 if (hci_stack->synchronous_flow_control_enabled == 0){ 3346 uint32_t now = btstack_run_loop_get_time_ms(); 3347 3348 if (!conn->sco_rx_valid){ 3349 // ignore first 10 packets 3350 conn->sco_rx_count++; 3351 // log_debug("sco rx count %u", conn->sco_rx_count); 3352 if (conn->sco_rx_count == 10) { 3353 // use first timestamp as is and pretent it just started 3354 conn->sco_rx_ms = now; 3355 conn->sco_rx_valid = 1; 3356 conn->sco_rx_count = 0; 3357 sco_schedule_tx(conn); 3358 } 3359 } else { 3360 // track expected arrival timme 3361 conn->sco_rx_count++; 3362 conn->sco_rx_ms += 7; 3363 int delta = (int32_t) (now - conn->sco_rx_ms); 3364 if (delta > 0){ 3365 conn->sco_rx_ms++; 3366 } 3367 // log_debug("sco rx %u", conn->sco_rx_ms); 3368 sco_schedule_tx(conn); 3369 } 3370 } 3371 } 3372 #endif 3373 3374 // deliver to app 3375 if (hci_stack->sco_packet_handler) { 3376 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3377 } 3378 3379 #ifdef HAVE_SCO_TRANSPORT 3380 // We can send one packet for each received packet 3381 conn->sco_tx_ready++; 3382 hci_notify_if_sco_can_send_now(); 3383 #endif 3384 3385 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3386 conn->num_packets_completed++; 3387 hci_stack->host_completed_packets = 1; 3388 hci_run(); 3389 #endif 3390 } 3391 #endif 3392 3393 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3394 hci_dump_packet(packet_type, 1, packet, size); 3395 switch (packet_type) { 3396 case HCI_EVENT_PACKET: 3397 event_handler(packet, size); 3398 break; 3399 case HCI_ACL_DATA_PACKET: 3400 acl_handler(packet, size); 3401 break; 3402 #ifdef ENABLE_CLASSIC 3403 case HCI_SCO_DATA_PACKET: 3404 sco_handler(packet, size); 3405 break; 3406 #endif 3407 default: 3408 break; 3409 } 3410 } 3411 3412 /** 3413 * @brief Add event packet handler. 3414 */ 3415 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3416 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3417 } 3418 3419 /** 3420 * @brief Remove event packet handler. 3421 */ 3422 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3423 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3424 } 3425 3426 /** Register HCI packet handlers */ 3427 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3428 hci_stack->acl_packet_handler = handler; 3429 } 3430 3431 #ifdef ENABLE_CLASSIC 3432 /** 3433 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3434 */ 3435 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3436 hci_stack->sco_packet_handler = handler; 3437 } 3438 #endif 3439 3440 static void hci_state_reset(void){ 3441 // no connections yet 3442 hci_stack->connections = NULL; 3443 3444 // keep discoverable/connectable as this has been requested by the client(s) 3445 // hci_stack->discoverable = 0; 3446 // hci_stack->connectable = 0; 3447 // hci_stack->bondable = 1; 3448 // hci_stack->own_addr_type = 0; 3449 3450 // buffer is free 3451 hci_stack->hci_packet_buffer_reserved = false; 3452 3453 // no pending cmds 3454 hci_stack->decline_reason = 0; 3455 3456 hci_stack->secure_connections_active = false; 3457 3458 #ifdef ENABLE_CLASSIC 3459 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3460 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3461 3462 hci_stack->gap_tasks = 3463 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3464 GAP_TASK_SET_CLASS_OF_DEVICE | 3465 GAP_TASK_SET_LOCAL_NAME | 3466 GAP_TASK_SET_EIR_DATA | 3467 GAP_TASK_WRITE_SCAN_ENABLE | 3468 GAP_TASK_WRITE_PAGE_TIMEOUT; 3469 #endif 3470 3471 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3472 hci_stack->classic_read_local_oob_data = false; 3473 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3474 #endif 3475 3476 // LE 3477 #ifdef ENABLE_BLE 3478 memset(hci_stack->le_random_address, 0, 6); 3479 hci_stack->le_random_address_set = 0; 3480 #endif 3481 #ifdef ENABLE_LE_CENTRAL 3482 hci_stack->le_scanning_active = false; 3483 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3484 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3485 hci_stack->le_whitelist_capacity = 0; 3486 #endif 3487 #ifdef ENABLE_LE_PERIPHERAL 3488 hci_stack->le_advertisements_active = false; 3489 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3490 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3491 } 3492 if (hci_stack->le_advertisements_data != NULL){ 3493 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3494 } 3495 #endif 3496 } 3497 3498 #ifdef ENABLE_CLASSIC 3499 /** 3500 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3501 */ 3502 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3503 // store and open remote device db 3504 hci_stack->link_key_db = link_key_db; 3505 if (hci_stack->link_key_db) { 3506 hci_stack->link_key_db->open(); 3507 } 3508 } 3509 #endif 3510 3511 void hci_init(const hci_transport_t *transport, const void *config){ 3512 3513 #ifdef HAVE_MALLOC 3514 if (!hci_stack) { 3515 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3516 } 3517 #else 3518 hci_stack = &hci_stack_static; 3519 #endif 3520 memset(hci_stack, 0, sizeof(hci_stack_t)); 3521 3522 // reference to use transport layer implementation 3523 hci_stack->hci_transport = transport; 3524 3525 // reference to used config 3526 hci_stack->config = config; 3527 3528 // setup pointer for outgoing packet buffer 3529 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3530 3531 // max acl payload size defined in config.h 3532 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3533 3534 // register packet handlers with transport 3535 transport->register_packet_handler(&packet_handler); 3536 3537 hci_stack->state = HCI_STATE_OFF; 3538 3539 // class of device 3540 hci_stack->class_of_device = 0x007a020c; // Smartphone 3541 3542 // bondable by default 3543 hci_stack->bondable = 1; 3544 3545 #ifdef ENABLE_CLASSIC 3546 // classic name 3547 hci_stack->local_name = default_classic_name; 3548 3549 // Master slave policy 3550 hci_stack->master_slave_policy = 1; 3551 3552 // Allow Role Switch 3553 hci_stack->allow_role_switch = 1; 3554 3555 // Default / minimum security level = 2 3556 hci_stack->gap_security_level = LEVEL_2; 3557 3558 // Default Security Mode 4 3559 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3560 3561 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3562 hci_stack->gap_required_encyrption_key_size = 7; 3563 3564 // Link Supervision Timeout 3565 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3566 3567 #endif 3568 3569 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3570 hci_stack->ssp_enable = 1; 3571 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3572 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3573 hci_stack->ssp_auto_accept = 1; 3574 3575 // Secure Connections: enable (requires support from Controller) 3576 hci_stack->secure_connections_enable = true; 3577 3578 // voice setting - signed 16 bit pcm data with CVSD over the air 3579 hci_stack->sco_voice_setting = 0x60; 3580 3581 #ifdef ENABLE_LE_CENTRAL 3582 // connection parameter to use for outgoing connections 3583 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3584 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3585 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3586 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3587 hci_stack->le_connection_latency = 4; // 4 3588 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3589 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3590 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3591 3592 // default LE Scanning 3593 hci_stack->le_scan_type = 0x1; // active 3594 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3595 hci_stack->le_scan_window = 0x30; // 30 ms 3596 #endif 3597 3598 #ifdef ENABLE_LE_PERIPHERAL 3599 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3600 #endif 3601 3602 // connection parameter range used to answer connection parameter update requests in l2cap 3603 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3604 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3605 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3606 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3607 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3608 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3609 3610 hci_state_reset(); 3611 } 3612 3613 void hci_deinit(void){ 3614 #ifdef HAVE_MALLOC 3615 if (hci_stack) { 3616 free(hci_stack); 3617 } 3618 #endif 3619 hci_stack = NULL; 3620 3621 #ifdef ENABLE_CLASSIC 3622 disable_l2cap_timeouts = 0; 3623 #endif 3624 } 3625 3626 /** 3627 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3628 */ 3629 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3630 hci_stack->chipset = chipset_driver; 3631 3632 // reset chipset driver - init is also called on power_up 3633 if (hci_stack->chipset && hci_stack->chipset->init){ 3634 hci_stack->chipset->init(hci_stack->config); 3635 } 3636 } 3637 3638 /** 3639 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3640 */ 3641 void hci_set_control(const btstack_control_t *hardware_control){ 3642 // references to used control implementation 3643 hci_stack->control = hardware_control; 3644 // init with transport config 3645 hardware_control->init(hci_stack->config); 3646 } 3647 3648 static void hci_discard_connections(void){ 3649 btstack_linked_list_iterator_t lit; 3650 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3651 while (btstack_linked_list_iterator_has_next(&lit)){ 3652 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3653 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3654 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3655 hci_shutdown_connection(connection); 3656 } 3657 } 3658 3659 void hci_close(void){ 3660 3661 #ifdef ENABLE_CLASSIC 3662 // close remote device db 3663 if (hci_stack->link_key_db) { 3664 hci_stack->link_key_db->close(); 3665 } 3666 #endif 3667 3668 hci_discard_connections(); 3669 3670 hci_power_control(HCI_POWER_OFF); 3671 3672 #ifdef HAVE_MALLOC 3673 free(hci_stack); 3674 #endif 3675 hci_stack = NULL; 3676 } 3677 3678 #ifdef HAVE_SCO_TRANSPORT 3679 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3680 hci_stack->sco_transport = sco_transport; 3681 sco_transport->register_packet_handler(&packet_handler); 3682 } 3683 #endif 3684 3685 #ifdef ENABLE_CLASSIC 3686 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3687 // validate ranage and set 3688 if (encryption_key_size < 7) return; 3689 if (encryption_key_size > 16) return; 3690 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3691 } 3692 3693 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3694 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3695 hci_stack->gap_security_mode = security_mode; 3696 return ERROR_CODE_SUCCESS; 3697 } else { 3698 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3699 } 3700 } 3701 3702 gap_security_mode_t gap_get_security_mode(void){ 3703 return hci_stack->gap_security_mode; 3704 } 3705 3706 void gap_set_security_level(gap_security_level_t security_level){ 3707 hci_stack->gap_security_level = security_level; 3708 } 3709 3710 gap_security_level_t gap_get_security_level(void){ 3711 if (hci_stack->gap_secure_connections_only_mode){ 3712 return LEVEL_4; 3713 } 3714 return hci_stack->gap_security_level; 3715 } 3716 3717 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3718 hci_stack->gap_minimal_service_security_level = security_level; 3719 } 3720 3721 void gap_set_secure_connections_only_mode(bool enable){ 3722 hci_stack->gap_secure_connections_only_mode = enable; 3723 } 3724 3725 bool gap_get_secure_connections_only_mode(void){ 3726 return hci_stack->gap_secure_connections_only_mode; 3727 } 3728 #endif 3729 3730 #ifdef ENABLE_CLASSIC 3731 void gap_set_class_of_device(uint32_t class_of_device){ 3732 hci_stack->class_of_device = class_of_device; 3733 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3734 hci_run(); 3735 } 3736 3737 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3738 hci_stack->default_link_policy_settings = default_link_policy_settings; 3739 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3740 hci_run(); 3741 } 3742 3743 void gap_set_allow_role_switch(bool allow_role_switch){ 3744 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3745 } 3746 3747 uint8_t hci_get_allow_role_switch(void){ 3748 return hci_stack->allow_role_switch; 3749 } 3750 3751 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3752 hci_stack->link_supervision_timeout = link_supervision_timeout; 3753 } 3754 3755 void hci_disable_l2cap_timeout_check(void){ 3756 disable_l2cap_timeouts = 1; 3757 } 3758 #endif 3759 3760 #ifndef HAVE_HOST_CONTROLLER_API 3761 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3762 void hci_set_bd_addr(bd_addr_t addr){ 3763 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3764 hci_stack->custom_bd_addr_set = 1; 3765 } 3766 #endif 3767 3768 // State-Module-Driver overview 3769 // state module low-level 3770 // HCI_STATE_OFF off close 3771 // HCI_STATE_INITIALIZING, on open 3772 // HCI_STATE_WORKING, on open 3773 // HCI_STATE_HALTING, on open 3774 // HCI_STATE_SLEEPING, off/sleep close 3775 // HCI_STATE_FALLING_ASLEEP on open 3776 3777 static int hci_power_control_on(void){ 3778 3779 // power on 3780 int err = 0; 3781 if (hci_stack->control && hci_stack->control->on){ 3782 err = (*hci_stack->control->on)(); 3783 } 3784 if (err){ 3785 log_error( "POWER_ON failed"); 3786 hci_emit_hci_open_failed(); 3787 return err; 3788 } 3789 3790 // int chipset driver 3791 if (hci_stack->chipset && hci_stack->chipset->init){ 3792 hci_stack->chipset->init(hci_stack->config); 3793 } 3794 3795 // init transport 3796 if (hci_stack->hci_transport->init){ 3797 hci_stack->hci_transport->init(hci_stack->config); 3798 } 3799 3800 // open transport 3801 err = hci_stack->hci_transport->open(); 3802 if (err){ 3803 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3804 if (hci_stack->control && hci_stack->control->off){ 3805 (*hci_stack->control->off)(); 3806 } 3807 hci_emit_hci_open_failed(); 3808 return err; 3809 } 3810 return 0; 3811 } 3812 3813 static void hci_power_control_off(void){ 3814 3815 log_info("hci_power_control_off"); 3816 3817 // close low-level device 3818 hci_stack->hci_transport->close(); 3819 3820 log_info("hci_power_control_off - hci_transport closed"); 3821 3822 // power off 3823 if (hci_stack->control && hci_stack->control->off){ 3824 (*hci_stack->control->off)(); 3825 } 3826 3827 log_info("hci_power_control_off - control closed"); 3828 3829 hci_stack->state = HCI_STATE_OFF; 3830 } 3831 3832 static void hci_power_control_sleep(void){ 3833 3834 log_info("hci_power_control_sleep"); 3835 3836 #if 0 3837 // don't close serial port during sleep 3838 3839 // close low-level device 3840 hci_stack->hci_transport->close(hci_stack->config); 3841 #endif 3842 3843 // sleep mode 3844 if (hci_stack->control && hci_stack->control->sleep){ 3845 (*hci_stack->control->sleep)(); 3846 } 3847 3848 hci_stack->state = HCI_STATE_SLEEPING; 3849 } 3850 3851 static int hci_power_control_wake(void){ 3852 3853 log_info("hci_power_control_wake"); 3854 3855 // wake on 3856 if (hci_stack->control && hci_stack->control->wake){ 3857 (*hci_stack->control->wake)(); 3858 } 3859 3860 #if 0 3861 // open low-level device 3862 int err = hci_stack->hci_transport->open(hci_stack->config); 3863 if (err){ 3864 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3865 if (hci_stack->control && hci_stack->control->off){ 3866 (*hci_stack->control->off)(); 3867 } 3868 hci_emit_hci_open_failed(); 3869 return err; 3870 } 3871 #endif 3872 3873 return 0; 3874 } 3875 3876 static void hci_power_transition_to_initializing(void){ 3877 // set up state machine 3878 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3879 hci_stack->hci_packet_buffer_reserved = false; 3880 hci_stack->state = HCI_STATE_INITIALIZING; 3881 hci_stack->substate = HCI_INIT_SEND_RESET; 3882 } 3883 3884 // returns error 3885 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3886 int err; 3887 switch (power_mode){ 3888 case HCI_POWER_ON: 3889 err = hci_power_control_on(); 3890 if (err != 0) { 3891 log_error("hci_power_control_on() error %d", err); 3892 return err; 3893 } 3894 hci_power_transition_to_initializing(); 3895 break; 3896 case HCI_POWER_OFF: 3897 // do nothing 3898 break; 3899 case HCI_POWER_SLEEP: 3900 // do nothing (with SLEEP == OFF) 3901 break; 3902 default: 3903 btstack_assert(false); 3904 break; 3905 } 3906 return ERROR_CODE_SUCCESS; 3907 } 3908 3909 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3910 switch (power_mode){ 3911 case HCI_POWER_ON: 3912 // do nothing 3913 break; 3914 case HCI_POWER_OFF: 3915 // no connections yet, just turn it off 3916 hci_power_control_off(); 3917 break; 3918 case HCI_POWER_SLEEP: 3919 // no connections yet, just turn it off 3920 hci_power_control_sleep(); 3921 break; 3922 default: 3923 btstack_assert(false); 3924 break; 3925 } 3926 return ERROR_CODE_SUCCESS; 3927 } 3928 3929 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3930 switch (power_mode){ 3931 case HCI_POWER_ON: 3932 // do nothing 3933 break; 3934 case HCI_POWER_OFF: 3935 // see hci_run 3936 hci_stack->state = HCI_STATE_HALTING; 3937 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3938 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3939 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3940 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3941 btstack_run_loop_add_timer(&hci_stack->timeout); 3942 break; 3943 case HCI_POWER_SLEEP: 3944 // see hci_run 3945 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3946 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3947 break; 3948 default: 3949 btstack_assert(false); 3950 break; 3951 } 3952 return ERROR_CODE_SUCCESS; 3953 } 3954 3955 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3956 switch (power_mode){ 3957 case HCI_POWER_ON: 3958 hci_power_transition_to_initializing(); 3959 break; 3960 case HCI_POWER_OFF: 3961 // do nothing 3962 break; 3963 case HCI_POWER_SLEEP: 3964 // see hci_run 3965 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3966 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3967 break; 3968 default: 3969 btstack_assert(false); 3970 break; 3971 } 3972 return ERROR_CODE_SUCCESS; 3973 } 3974 3975 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3976 switch (power_mode){ 3977 case HCI_POWER_ON: 3978 hci_power_transition_to_initializing(); 3979 break; 3980 case HCI_POWER_OFF: 3981 // see hci_run 3982 hci_stack->state = HCI_STATE_HALTING; 3983 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3984 break; 3985 case HCI_POWER_SLEEP: 3986 // do nothing 3987 break; 3988 default: 3989 btstack_assert(false); 3990 break; 3991 } 3992 return ERROR_CODE_SUCCESS; 3993 } 3994 3995 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3996 int err; 3997 switch (power_mode){ 3998 case HCI_POWER_ON: 3999 err = hci_power_control_wake(); 4000 if (err) return err; 4001 hci_power_transition_to_initializing(); 4002 break; 4003 case HCI_POWER_OFF: 4004 hci_stack->state = HCI_STATE_HALTING; 4005 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4006 break; 4007 case HCI_POWER_SLEEP: 4008 // do nothing 4009 break; 4010 default: 4011 btstack_assert(false); 4012 break; 4013 } 4014 return ERROR_CODE_SUCCESS; 4015 } 4016 4017 int hci_power_control(HCI_POWER_MODE power_mode){ 4018 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4019 int err = 0; 4020 switch (hci_stack->state){ 4021 case HCI_STATE_OFF: 4022 err = hci_power_control_state_off(power_mode); 4023 break; 4024 case HCI_STATE_INITIALIZING: 4025 err = hci_power_control_state_initializing(power_mode); 4026 break; 4027 case HCI_STATE_WORKING: 4028 err = hci_power_control_state_working(power_mode); 4029 break; 4030 case HCI_STATE_HALTING: 4031 err = hci_power_control_state_halting(power_mode); 4032 break; 4033 case HCI_STATE_FALLING_ASLEEP: 4034 err = hci_power_control_state_falling_asleep(power_mode); 4035 break; 4036 case HCI_STATE_SLEEPING: 4037 err = hci_power_control_state_sleeping(power_mode); 4038 break; 4039 default: 4040 btstack_assert(false); 4041 break; 4042 } 4043 if (err != 0){ 4044 return err; 4045 } 4046 4047 // create internal event 4048 hci_emit_state(); 4049 4050 // trigger next/first action 4051 hci_run(); 4052 4053 return 0; 4054 } 4055 4056 4057 #ifdef ENABLE_CLASSIC 4058 4059 static void hci_update_scan_enable(void){ 4060 // 2 = page scan, 1 = inq scan 4061 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4062 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4063 hci_run(); 4064 } 4065 4066 void gap_discoverable_control(uint8_t enable){ 4067 if (enable) enable = 1; // normalize argument 4068 4069 if (hci_stack->discoverable == enable){ 4070 hci_emit_discoverable_enabled(hci_stack->discoverable); 4071 return; 4072 } 4073 4074 hci_stack->discoverable = enable; 4075 hci_update_scan_enable(); 4076 } 4077 4078 void gap_connectable_control(uint8_t enable){ 4079 if (enable) enable = 1; // normalize argument 4080 4081 // don't emit event 4082 if (hci_stack->connectable == enable) return; 4083 4084 hci_stack->connectable = enable; 4085 hci_update_scan_enable(); 4086 } 4087 #endif 4088 4089 void gap_local_bd_addr(bd_addr_t address_buffer){ 4090 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4091 } 4092 4093 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4094 static void hci_host_num_completed_packets(void){ 4095 4096 // create packet manually as arrays are not supported and num_commands should not get reduced 4097 hci_reserve_packet_buffer(); 4098 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4099 4100 uint16_t size = 0; 4101 uint16_t num_handles = 0; 4102 packet[size++] = 0x35; 4103 packet[size++] = 0x0c; 4104 size++; // skip param len 4105 size++; // skip num handles 4106 4107 // add { handle, packets } entries 4108 btstack_linked_item_t * it; 4109 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4110 hci_connection_t * connection = (hci_connection_t *) it; 4111 if (connection->num_packets_completed){ 4112 little_endian_store_16(packet, size, connection->con_handle); 4113 size += 2; 4114 little_endian_store_16(packet, size, connection->num_packets_completed); 4115 size += 2; 4116 // 4117 num_handles++; 4118 connection->num_packets_completed = 0; 4119 } 4120 } 4121 4122 packet[2] = size - 3; 4123 packet[3] = num_handles; 4124 4125 hci_stack->host_completed_packets = 0; 4126 4127 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4128 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4129 4130 // release packet buffer for synchronous transport implementations 4131 if (hci_transport_synchronous()){ 4132 hci_release_packet_buffer(); 4133 hci_emit_transport_packet_sent(); 4134 } 4135 } 4136 #endif 4137 4138 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4139 UNUSED(ds); 4140 hci_stack->substate = HCI_HALTING_CLOSE; 4141 // allow packet handlers to defer final shutdown 4142 hci_emit_state(); 4143 hci_run(); 4144 } 4145 4146 static bool hci_run_acl_fragments(void){ 4147 if (hci_stack->acl_fragmentation_total_size > 0u) { 4148 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4149 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4150 if (connection) { 4151 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4152 hci_send_acl_packet_fragments(connection); 4153 return true; 4154 } 4155 } else { 4156 // connection gone -> discard further fragments 4157 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4158 hci_stack->acl_fragmentation_total_size = 0; 4159 hci_stack->acl_fragmentation_pos = 0; 4160 } 4161 } 4162 return false; 4163 } 4164 4165 #ifdef ENABLE_CLASSIC 4166 static bool hci_run_general_gap_classic(void){ 4167 4168 // assert stack is working and classic is active 4169 if (hci_classic_supported() == false) return false; 4170 if (hci_stack->state != HCI_STATE_WORKING) return false; 4171 4172 // decline incoming connections 4173 if (hci_stack->decline_reason){ 4174 uint8_t reason = hci_stack->decline_reason; 4175 hci_stack->decline_reason = 0; 4176 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4177 return true; 4178 } 4179 4180 if (hci_stack->gap_tasks != 0){ 4181 hci_run_gap_tasks_classic(); 4182 return true; 4183 } 4184 4185 // start/stop inquiry 4186 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4187 uint8_t duration = hci_stack->inquiry_state; 4188 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4189 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4190 return true; 4191 } 4192 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4193 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4194 hci_send_cmd(&hci_inquiry_cancel); 4195 return true; 4196 } 4197 // remote name request 4198 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4199 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4200 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4201 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4202 return true; 4203 } 4204 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4205 // Local OOB data 4206 if (hci_stack->classic_read_local_oob_data){ 4207 hci_stack->classic_read_local_oob_data = false; 4208 if (hci_stack->local_supported_commands[1] & 0x10u){ 4209 hci_send_cmd(&hci_read_local_extended_oob_data); 4210 } else { 4211 hci_send_cmd(&hci_read_local_oob_data); 4212 } 4213 } 4214 #endif 4215 // pairing 4216 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4217 uint8_t state = hci_stack->gap_pairing_state; 4218 uint8_t pin_code[16]; 4219 switch (state){ 4220 case GAP_PAIRING_STATE_SEND_PIN: 4221 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4222 memset(pin_code, 0, 16); 4223 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4224 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4225 break; 4226 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4227 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4228 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4229 break; 4230 case GAP_PAIRING_STATE_SEND_PASSKEY: 4231 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4232 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4233 break; 4234 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4235 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4236 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4237 break; 4238 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4239 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4240 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4241 break; 4242 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4243 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4244 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4245 break; 4246 default: 4247 break; 4248 } 4249 return true; 4250 } 4251 return false; 4252 } 4253 #endif 4254 4255 #ifdef ENABLE_BLE 4256 static bool hci_run_general_gap_le(void){ 4257 4258 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4259 4260 if (hci_stack->state != HCI_STATE_WORKING) return false; 4261 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4262 4263 4264 // Phase 1: collect what to stop 4265 4266 bool scanning_stop = false; 4267 bool connecting_stop = false; 4268 bool advertising_stop = false; 4269 4270 #ifndef ENABLE_LE_CENTRAL 4271 UNUSED(scanning_stop); 4272 UNUSED(connecting_stop); 4273 #endif 4274 #ifndef ENABLE_LE_PERIPHERAL 4275 UNUSED(advertising_stop); 4276 #endif 4277 4278 // check if own address changes 4279 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4280 4281 // check if whitelist needs modification 4282 bool whitelist_modification_pending = false; 4283 btstack_linked_list_iterator_t lit; 4284 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4285 while (btstack_linked_list_iterator_has_next(&lit)){ 4286 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4287 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4288 whitelist_modification_pending = true; 4289 break; 4290 } 4291 } 4292 // check if resolving list needs modification 4293 bool resolving_list_modification_pending = false; 4294 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4295 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4296 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4297 resolving_list_modification_pending = true; 4298 } 4299 #endif 4300 4301 #ifdef ENABLE_LE_CENTRAL 4302 // scanning control 4303 if (hci_stack->le_scanning_active) { 4304 // stop if: 4305 // - parameter change required 4306 // - it's disabled 4307 // - whitelist change required but used for scanning 4308 // - resolving list modified 4309 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4310 if ((hci_stack->le_scanning_param_update) || 4311 !hci_stack->le_scanning_enabled || 4312 scanning_uses_whitelist || 4313 resolving_list_modification_pending){ 4314 4315 scanning_stop = true; 4316 } 4317 } 4318 #endif 4319 4320 #ifdef ENABLE_LE_CENTRAL 4321 // connecting control 4322 bool connecting_with_whitelist; 4323 switch (hci_stack->le_connecting_state){ 4324 case LE_CONNECTING_DIRECT: 4325 case LE_CONNECTING_WHITELIST: 4326 // stop connecting if: 4327 // - connecting uses white and whitelist modification pending 4328 // - if it got disabled 4329 // - resolving list modified 4330 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4331 if ((connecting_with_whitelist && whitelist_modification_pending) || 4332 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4333 resolving_list_modification_pending) { 4334 4335 connecting_stop = true; 4336 } 4337 break; 4338 default: 4339 break; 4340 } 4341 #endif 4342 4343 #ifdef ENABLE_LE_PERIPHERAL 4344 // le advertisement control 4345 if (hci_stack->le_advertisements_active){ 4346 // stop if: 4347 // - parameter change required 4348 // - random address used in advertising and changes 4349 // - it's disabled 4350 // - whitelist change required but used for advertisement filter policy 4351 // - resolving list modified 4352 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4353 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4354 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4355 if (advertising_change || 4356 (advertising_uses_random_address && random_address_change) || 4357 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4358 (advertising_uses_whitelist && whitelist_modification_pending) || 4359 resolving_list_modification_pending) { 4360 4361 advertising_stop = true; 4362 } 4363 } 4364 #endif 4365 4366 4367 // Phase 2: stop everything that should be off during modifications 4368 4369 #ifdef ENABLE_LE_CENTRAL 4370 if (scanning_stop){ 4371 hci_stack->le_scanning_active = false; 4372 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4373 return true; 4374 } 4375 #endif 4376 4377 #ifdef ENABLE_LE_CENTRAL 4378 if (connecting_stop){ 4379 hci_send_cmd(&hci_le_create_connection_cancel); 4380 return true; 4381 } 4382 #endif 4383 4384 #ifdef ENABLE_LE_PERIPHERAL 4385 if (advertising_stop){ 4386 hci_stack->le_advertisements_active = false; 4387 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4388 return true; 4389 } 4390 #endif 4391 4392 // Phase 3: modify 4393 4394 if (random_address_change){ 4395 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4396 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4397 return true; 4398 } 4399 4400 #ifdef ENABLE_LE_CENTRAL 4401 if (hci_stack->le_scanning_param_update){ 4402 hci_stack->le_scanning_param_update = false; 4403 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4404 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4405 return true; 4406 } 4407 #endif 4408 4409 #ifdef ENABLE_LE_PERIPHERAL 4410 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4411 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4412 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4413 hci_send_cmd(&hci_le_set_advertising_parameters, 4414 hci_stack->le_advertisements_interval_min, 4415 hci_stack->le_advertisements_interval_max, 4416 hci_stack->le_advertisements_type, 4417 hci_stack->le_advertisements_own_addr_type, 4418 hci_stack->le_advertisements_direct_address_type, 4419 hci_stack->le_advertisements_direct_address, 4420 hci_stack->le_advertisements_channel_map, 4421 hci_stack->le_advertisements_filter_policy); 4422 return true; 4423 } 4424 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4425 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4426 uint8_t adv_data_clean[31]; 4427 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4428 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4429 hci_stack->le_advertisements_data_len); 4430 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4431 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4432 return true; 4433 } 4434 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4435 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4436 uint8_t scan_data_clean[31]; 4437 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4438 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4439 hci_stack->le_scan_response_data_len); 4440 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4441 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4442 return true; 4443 } 4444 #endif 4445 4446 4447 #ifdef ENABLE_LE_CENTRAL 4448 // if connect with whitelist was active and is not cancelled yet, wait until next time 4449 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4450 #endif 4451 4452 // LE Whitelist Management 4453 if (whitelist_modification_pending){ 4454 // add/remove entries 4455 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4456 while (btstack_linked_list_iterator_has_next(&lit)){ 4457 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4458 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4459 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4460 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4461 return true; 4462 } 4463 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4464 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4465 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4466 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4467 return true; 4468 } 4469 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4470 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4471 btstack_memory_whitelist_entry_free(entry); 4472 } 4473 } 4474 } 4475 4476 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4477 // LE Resolving List Management 4478 if (resolving_list_supported) { 4479 uint16_t i; 4480 switch (hci_stack->le_resolving_list_state) { 4481 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4482 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4483 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4484 return true; 4485 case LE_RESOLVING_LIST_READ_SIZE: 4486 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4487 hci_send_cmd(&hci_le_read_resolving_list_size); 4488 return true; 4489 case LE_RESOLVING_LIST_SEND_CLEAR: 4490 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4491 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4492 sizeof(hci_stack->le_resolving_list_add_entries)); 4493 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4494 sizeof(hci_stack->le_resolving_list_remove_entries)); 4495 hci_send_cmd(&hci_le_clear_resolving_list); 4496 return true; 4497 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4498 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4499 uint8_t offset = i >> 3; 4500 uint8_t mask = 1 << (i & 7); 4501 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4502 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4503 bd_addr_t peer_identity_addreses; 4504 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4505 sm_key_t peer_irk; 4506 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4507 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4508 4509 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4510 // trigger whitelist entry 'update' (work around for controller bug) 4511 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4512 while (btstack_linked_list_iterator_has_next(&lit)) { 4513 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4514 if (entry->address_type != peer_identity_addr_type) continue; 4515 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4516 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4517 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4518 } 4519 #endif 4520 4521 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4522 peer_identity_addreses); 4523 return true; 4524 } 4525 4526 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4527 4528 /* fall through */ 4529 4530 case LE_RESOLVING_LIST_ADD_ENTRIES: 4531 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4532 uint8_t offset = i >> 3; 4533 uint8_t mask = 1 << (i & 7); 4534 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4535 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4536 bd_addr_t peer_identity_addreses; 4537 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4538 sm_key_t peer_irk; 4539 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4540 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4541 const uint8_t *local_irk = gap_get_persistent_irk(); 4542 // command uses format specifier 'P' that stores 16-byte value without flip 4543 uint8_t local_irk_flipped[16]; 4544 uint8_t peer_irk_flipped[16]; 4545 reverse_128(local_irk, local_irk_flipped); 4546 reverse_128(peer_irk, peer_irk_flipped); 4547 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4548 peer_irk_flipped, local_irk_flipped); 4549 return true; 4550 } 4551 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4552 break; 4553 4554 default: 4555 break; 4556 } 4557 } 4558 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4559 #endif 4560 4561 // Phase 4: restore state 4562 4563 #ifdef ENABLE_LE_CENTRAL 4564 // re-start scanning 4565 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4566 hci_stack->le_scanning_active = true; 4567 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4568 return true; 4569 } 4570 #endif 4571 4572 #ifdef ENABLE_LE_CENTRAL 4573 // re-start connecting 4574 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4575 bd_addr_t null_addr; 4576 memset(null_addr, 0, 6); 4577 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4578 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4579 hci_send_cmd(&hci_le_create_connection, 4580 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4581 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4582 1, // use whitelist 4583 0, // peer address type 4584 null_addr, // peer bd addr 4585 hci_stack->le_connection_own_addr_type, // our addr type: 4586 hci_stack->le_connection_interval_min, // conn interval min 4587 hci_stack->le_connection_interval_max, // conn interval max 4588 hci_stack->le_connection_latency, // conn latency 4589 hci_stack->le_supervision_timeout, // conn latency 4590 hci_stack->le_minimum_ce_length, // min ce length 4591 hci_stack->le_maximum_ce_length // max ce length 4592 ); 4593 return true; 4594 } 4595 #endif 4596 4597 #ifdef ENABLE_LE_PERIPHERAL 4598 // re-start advertising 4599 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4600 // check if advertisements should be enabled given 4601 hci_stack->le_advertisements_active = true; 4602 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4603 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4604 return true; 4605 } 4606 #endif 4607 4608 return false; 4609 } 4610 #endif 4611 4612 static bool hci_run_general_pending_commands(void){ 4613 btstack_linked_item_t * it; 4614 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4615 hci_connection_t * connection = (hci_connection_t *) it; 4616 4617 switch(connection->state){ 4618 case SEND_CREATE_CONNECTION: 4619 switch(connection->address_type){ 4620 #ifdef ENABLE_CLASSIC 4621 case BD_ADDR_TYPE_ACL: 4622 log_info("sending hci_create_connection"); 4623 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4624 break; 4625 #endif 4626 default: 4627 #ifdef ENABLE_BLE 4628 #ifdef ENABLE_LE_CENTRAL 4629 log_info("sending hci_le_create_connection"); 4630 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4631 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4632 hci_send_cmd(&hci_le_create_connection, 4633 hci_stack->le_connection_scan_interval, // conn scan interval 4634 hci_stack->le_connection_scan_window, // conn scan windows 4635 0, // don't use whitelist 4636 connection->address_type, // peer address type 4637 connection->address, // peer bd addr 4638 hci_stack->le_connection_own_addr_type, // our addr type: 4639 hci_stack->le_connection_interval_min, // conn interval min 4640 hci_stack->le_connection_interval_max, // conn interval max 4641 hci_stack->le_connection_latency, // conn latency 4642 hci_stack->le_supervision_timeout, // conn latency 4643 hci_stack->le_minimum_ce_length, // min ce length 4644 hci_stack->le_maximum_ce_length // max ce length 4645 ); 4646 connection->state = SENT_CREATE_CONNECTION; 4647 #endif 4648 #endif 4649 break; 4650 } 4651 return true; 4652 4653 #ifdef ENABLE_CLASSIC 4654 case RECEIVED_CONNECTION_REQUEST: 4655 connection->role = HCI_ROLE_SLAVE; 4656 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4657 log_info("sending hci_accept_connection_request"); 4658 connection->state = ACCEPTED_CONNECTION_REQUEST; 4659 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4660 } 4661 return true; 4662 #endif 4663 4664 #ifdef ENABLE_BLE 4665 #ifdef ENABLE_LE_CENTRAL 4666 case SEND_CANCEL_CONNECTION: 4667 connection->state = SENT_CANCEL_CONNECTION; 4668 hci_send_cmd(&hci_le_create_connection_cancel); 4669 return true; 4670 #endif 4671 #endif 4672 case SEND_DISCONNECT: 4673 connection->state = SENT_DISCONNECT; 4674 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4675 return true; 4676 4677 default: 4678 break; 4679 } 4680 4681 // no further commands if connection is about to get shut down 4682 if (connection->state == SENT_DISCONNECT) continue; 4683 4684 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4685 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4686 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4687 return true; 4688 } 4689 4690 #ifdef ENABLE_CLASSIC 4691 4692 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4693 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4694 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4695 return true; 4696 } 4697 4698 // Handling link key request requires remote supported features 4699 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4700 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4701 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4702 4703 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4704 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4705 if (have_link_key && security_level_sufficient){ 4706 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4707 } else { 4708 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4709 } 4710 return true; 4711 } 4712 4713 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4714 log_info("denying to pin request"); 4715 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4716 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4717 return true; 4718 } 4719 4720 // security assessment requires remote features 4721 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4722 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4723 hci_ssp_assess_security_on_io_cap_request(connection); 4724 // 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 4725 } 4726 4727 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4728 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4729 // set authentication requirements: 4730 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4731 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4732 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4733 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4734 authreq |= 1; 4735 } 4736 bool bonding = hci_stack->bondable; 4737 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4738 // if we have received IO Cap Response, we're in responder role 4739 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4740 if (bonding && !remote_bonding){ 4741 log_info("Remote not bonding, dropping local flag"); 4742 bonding = false; 4743 } 4744 } 4745 if (bonding){ 4746 if (connection->bonding_flags & BONDING_DEDICATED){ 4747 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4748 } else { 4749 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4750 } 4751 } 4752 uint8_t have_oob_data = 0; 4753 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4754 if (connection->classic_oob_c_192 != NULL){ 4755 have_oob_data |= 1; 4756 } 4757 if (connection->classic_oob_c_256 != NULL){ 4758 have_oob_data |= 2; 4759 } 4760 #endif 4761 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4762 return true; 4763 } 4764 4765 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4766 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4767 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4768 return true; 4769 } 4770 4771 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4772 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4773 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4774 const uint8_t zero[16] = { 0 }; 4775 const uint8_t * r_192 = zero; 4776 const uint8_t * c_192 = zero; 4777 const uint8_t * r_256 = zero; 4778 const uint8_t * c_256 = zero; 4779 // verify P-256 OOB 4780 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4781 c_256 = connection->classic_oob_c_256; 4782 if (connection->classic_oob_r_256 != NULL) { 4783 r_256 = connection->classic_oob_r_256; 4784 } 4785 } 4786 // verify P-192 OOB 4787 if ((connection->classic_oob_c_192 != NULL)) { 4788 c_192 = connection->classic_oob_c_192; 4789 if (connection->classic_oob_r_192 != NULL) { 4790 r_192 = connection->classic_oob_r_192; 4791 } 4792 } 4793 4794 // assess security 4795 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4796 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4797 if (need_level_4 && !can_reach_level_4){ 4798 log_info("Level 4 required, but not possible -> abort"); 4799 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4800 // send oob negative reply 4801 c_256 = NULL; 4802 c_192 = NULL; 4803 } 4804 4805 // Reply 4806 if (c_256 != zero) { 4807 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4808 } else if (c_192 != zero){ 4809 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4810 } else { 4811 hci_stack->classic_oob_con_handle = connection->con_handle; 4812 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4813 } 4814 return true; 4815 } 4816 #endif 4817 4818 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4819 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4820 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4821 return true; 4822 } 4823 4824 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4825 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4826 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4827 return true; 4828 } 4829 4830 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4831 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4832 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4833 return true; 4834 } 4835 4836 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4837 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4838 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4839 connection->state = SENT_DISCONNECT; 4840 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4841 return true; 4842 } 4843 4844 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4845 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4846 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4847 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4848 return true; 4849 } 4850 4851 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4852 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4853 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4854 return true; 4855 } 4856 4857 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4858 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4859 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4860 return true; 4861 } 4862 4863 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4864 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4865 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4866 return true; 4867 } 4868 4869 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4870 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4871 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4872 return true; 4873 } 4874 4875 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4876 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4877 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4878 return true; 4879 } 4880 #endif 4881 4882 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4883 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4884 #ifdef ENABLE_CLASSIC 4885 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4886 #endif 4887 if (connection->state != SENT_DISCONNECT){ 4888 connection->state = SENT_DISCONNECT; 4889 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4890 return true; 4891 } 4892 } 4893 4894 #ifdef ENABLE_CLASSIC 4895 uint16_t sniff_min_interval; 4896 switch (connection->sniff_min_interval){ 4897 case 0: 4898 break; 4899 case 0xffff: 4900 connection->sniff_min_interval = 0; 4901 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4902 return true; 4903 default: 4904 sniff_min_interval = connection->sniff_min_interval; 4905 connection->sniff_min_interval = 0; 4906 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4907 return true; 4908 } 4909 4910 if (connection->sniff_subrating_max_latency != 0xffff){ 4911 uint16_t max_latency = connection->sniff_subrating_max_latency; 4912 connection->sniff_subrating_max_latency = 0; 4913 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4914 return true; 4915 } 4916 4917 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4918 uint8_t service_type = (uint8_t) connection->qos_service_type; 4919 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4920 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); 4921 return true; 4922 } 4923 4924 if (connection->request_role != HCI_ROLE_INVALID){ 4925 hci_role_t role = connection->request_role; 4926 connection->request_role = HCI_ROLE_INVALID; 4927 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4928 return true; 4929 } 4930 #endif 4931 4932 #ifdef ENABLE_BLE 4933 switch (connection->le_con_parameter_update_state){ 4934 // response to L2CAP CON PARAMETER UPDATE REQUEST 4935 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4936 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4937 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4938 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4939 0x0000, 0xffff); 4940 return true; 4941 case CON_PARAMETER_UPDATE_REPLY: 4942 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4943 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4944 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4945 0x0000, 0xffff); 4946 return true; 4947 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4948 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4949 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4950 return true; 4951 default: 4952 break; 4953 } 4954 if (connection->le_phy_update_all_phys != 0xffu){ 4955 uint8_t all_phys = connection->le_phy_update_all_phys; 4956 connection->le_phy_update_all_phys = 0xff; 4957 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); 4958 return true; 4959 } 4960 #endif 4961 } 4962 return false; 4963 } 4964 4965 static void hci_run(void){ 4966 4967 bool done; 4968 4969 // send continuation fragments first, as they block the prepared packet buffer 4970 done = hci_run_acl_fragments(); 4971 if (done) return; 4972 4973 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4974 // send host num completed packets next as they don't require num_cmd_packets > 0 4975 if (!hci_can_send_comand_packet_transport()) return; 4976 if (hci_stack->host_completed_packets){ 4977 hci_host_num_completed_packets(); 4978 return; 4979 } 4980 #endif 4981 4982 if (!hci_can_send_command_packet_now()) return; 4983 4984 // global/non-connection oriented commands 4985 4986 4987 #ifdef ENABLE_CLASSIC 4988 // general gap classic 4989 done = hci_run_general_gap_classic(); 4990 if (done) return; 4991 #endif 4992 4993 #ifdef ENABLE_BLE 4994 // general gap le 4995 done = hci_run_general_gap_le(); 4996 if (done) return; 4997 #endif 4998 4999 // send pending HCI commands 5000 done = hci_run_general_pending_commands(); 5001 if (done) return; 5002 5003 // stack state sub statemachines 5004 hci_connection_t * connection; 5005 switch (hci_stack->state){ 5006 case HCI_STATE_INITIALIZING: 5007 hci_initializing_run(); 5008 break; 5009 5010 case HCI_STATE_HALTING: 5011 5012 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 5013 switch (hci_stack->substate){ 5014 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 5015 case HCI_HALTING_DISCONNECT_ALL_TIMER: 5016 5017 #ifdef ENABLE_BLE 5018 #ifdef ENABLE_LE_CENTRAL 5019 hci_whitelist_free(); 5020 #endif 5021 #endif 5022 // close all open connections 5023 connection = (hci_connection_t *) hci_stack->connections; 5024 if (connection){ 5025 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5026 if (!hci_can_send_command_packet_now()) return; 5027 5028 // check state 5029 if (connection->state == SENT_DISCONNECT) return; 5030 connection->state = SENT_DISCONNECT; 5031 5032 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5033 5034 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5035 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5036 5037 // ... which would be ignored anyway as we shutdown (free) the connection now 5038 hci_shutdown_connection(connection); 5039 5040 // finally, send the disconnect command 5041 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5042 return; 5043 } 5044 5045 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5046 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5047 log_info("HCI_STATE_HALTING: wait 50 ms"); 5048 hci_stack->substate = HCI_HALTING_W4_TIMER; 5049 btstack_run_loop_remove_timer(&hci_stack->timeout); 5050 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5051 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5052 btstack_run_loop_add_timer(&hci_stack->timeout); 5053 break; 5054 } 5055 5056 /* fall through */ 5057 5058 case HCI_HALTING_CLOSE: 5059 // close left over connections (that had not been properly closed before) 5060 hci_discard_connections(); 5061 5062 log_info("HCI_STATE_HALTING, calling off"); 5063 5064 // switch mode 5065 hci_power_control_off(); 5066 5067 log_info("HCI_STATE_HALTING, emitting state"); 5068 hci_emit_state(); 5069 log_info("HCI_STATE_HALTING, done"); 5070 break; 5071 5072 case HCI_HALTING_W4_TIMER: 5073 // keep waiting 5074 5075 break; 5076 default: 5077 break; 5078 } 5079 5080 break; 5081 5082 case HCI_STATE_FALLING_ASLEEP: 5083 switch(hci_stack->substate) { 5084 case HCI_FALLING_ASLEEP_DISCONNECT: 5085 log_info("HCI_STATE_FALLING_ASLEEP"); 5086 // close all open connections 5087 connection = (hci_connection_t *) hci_stack->connections; 5088 if (connection){ 5089 5090 // send disconnect 5091 if (!hci_can_send_command_packet_now()) return; 5092 5093 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5094 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5095 5096 // send disconnected event right away - causes higher layer connections to get closed, too. 5097 hci_shutdown_connection(connection); 5098 return; 5099 } 5100 5101 if (hci_classic_supported()){ 5102 // disable page and inquiry scan 5103 if (!hci_can_send_command_packet_now()) return; 5104 5105 log_info("HCI_STATE_HALTING, disabling inq scans"); 5106 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5107 5108 // continue in next sub state 5109 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5110 break; 5111 } 5112 5113 /* fall through */ 5114 5115 case HCI_FALLING_ASLEEP_COMPLETE: 5116 log_info("HCI_STATE_HALTING, calling sleep"); 5117 // switch mode 5118 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5119 hci_emit_state(); 5120 break; 5121 5122 default: 5123 break; 5124 } 5125 break; 5126 5127 default: 5128 break; 5129 } 5130 } 5131 5132 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5133 // house-keeping 5134 5135 #ifdef ENABLE_CLASSIC 5136 bd_addr_t addr; 5137 hci_connection_t * conn; 5138 #endif 5139 #ifdef ENABLE_LE_CENTRAL 5140 uint8_t initiator_filter_policy; 5141 #endif 5142 5143 uint16_t opcode = little_endian_read_16(packet, 0); 5144 switch (opcode) { 5145 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5146 hci_stack->loopback_mode = packet[3]; 5147 break; 5148 5149 #ifdef ENABLE_CLASSIC 5150 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5151 reverse_bd_addr(&packet[3], addr); 5152 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5153 5154 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5155 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5156 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5157 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5158 } 5159 5160 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5161 if (!conn) { 5162 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5163 if (!conn) { 5164 // notify client that alloc failed 5165 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5166 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5167 } 5168 conn->state = SEND_CREATE_CONNECTION; 5169 conn->role = HCI_ROLE_MASTER; 5170 } 5171 5172 conn->con_handle = HCI_CON_HANDLE_INVALID; 5173 conn->role = HCI_ROLE_INVALID; 5174 5175 log_info("conn state %u", conn->state); 5176 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5177 switch (conn->state) { 5178 // if connection active exists 5179 case OPEN: 5180 // and OPEN, emit connection complete command 5181 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5182 // packet not sent to controller 5183 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5184 case RECEIVED_DISCONNECTION_COMPLETE: 5185 // create connection triggered in disconnect complete event, let's do it now 5186 break; 5187 case SEND_CREATE_CONNECTION: 5188 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5189 break; 5190 default: 5191 // otherwise, just ignore as it is already in the open process 5192 // packet not sent to controller 5193 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5194 } 5195 conn->state = SENT_CREATE_CONNECTION; 5196 5197 // track outgoing connection 5198 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5199 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5200 break; 5201 5202 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5203 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5204 // setup_synchronous_connection? Voice setting at offset 22 5205 // TODO: compare to current setting if sco connection already active 5206 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5207 break; 5208 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5209 // accept_synchronous_connection? Voice setting at offset 18 5210 // TODO: compare to current setting if sco connection already active 5211 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5212 break; 5213 #endif 5214 #endif 5215 5216 #ifdef ENABLE_BLE 5217 #ifdef ENABLE_LE_CENTRAL 5218 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5219 // white list used? 5220 initiator_filter_policy = packet[7]; 5221 switch (initiator_filter_policy) { 5222 case 0: 5223 // whitelist not used 5224 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5225 break; 5226 case 1: 5227 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5228 break; 5229 default: 5230 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5231 break; 5232 } 5233 // track outgoing connection 5234 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5235 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5236 break; 5237 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5238 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5239 break; 5240 #endif 5241 #endif 5242 default: 5243 break; 5244 } 5245 5246 hci_stack->num_cmd_packets--; 5247 5248 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5249 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5250 if (err != 0){ 5251 return ERROR_CODE_HARDWARE_FAILURE; 5252 } 5253 return ERROR_CODE_SUCCESS; 5254 } 5255 5256 // disconnect because of security block 5257 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5258 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5259 if (!connection) return; 5260 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5261 } 5262 5263 5264 // Configure Secure Simple Pairing 5265 5266 #ifdef ENABLE_CLASSIC 5267 5268 // enable will enable SSP during init 5269 void gap_ssp_set_enable(int enable){ 5270 hci_stack->ssp_enable = enable; 5271 } 5272 5273 static int hci_local_ssp_activated(void){ 5274 return gap_ssp_supported() && hci_stack->ssp_enable; 5275 } 5276 5277 // if set, BTstack will respond to io capability request using authentication requirement 5278 void gap_ssp_set_io_capability(int io_capability){ 5279 hci_stack->ssp_io_capability = io_capability; 5280 } 5281 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5282 hci_stack->ssp_authentication_requirement = authentication_requirement; 5283 } 5284 5285 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5286 void gap_ssp_set_auto_accept(int auto_accept){ 5287 hci_stack->ssp_auto_accept = auto_accept; 5288 } 5289 5290 void gap_secure_connections_enable(bool enable){ 5291 hci_stack->secure_connections_enable = enable; 5292 } 5293 5294 #endif 5295 5296 // va_list part of hci_send_cmd 5297 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5298 if (!hci_can_send_command_packet_now()){ 5299 log_error("hci_send_cmd called but cannot send packet now"); 5300 return ERROR_CODE_COMMAND_DISALLOWED; 5301 } 5302 5303 // for HCI INITIALIZATION 5304 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5305 hci_stack->last_cmd_opcode = cmd->opcode; 5306 5307 hci_reserve_packet_buffer(); 5308 uint8_t * packet = hci_stack->hci_packet_buffer; 5309 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5310 uint8_t status = hci_send_cmd_packet(packet, size); 5311 5312 // release packet buffer on error or for synchronous transport implementations 5313 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5314 hci_release_packet_buffer(); 5315 hci_emit_transport_packet_sent(); 5316 } 5317 5318 return status; 5319 } 5320 5321 /** 5322 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5323 */ 5324 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5325 va_list argptr; 5326 va_start(argptr, cmd); 5327 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5328 va_end(argptr); 5329 return status; 5330 } 5331 5332 // Create various non-HCI events. 5333 // TODO: generalize, use table similar to hci_create_command 5334 5335 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5336 // dump packet 5337 if (dump) { 5338 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5339 } 5340 5341 // dispatch to all event handlers 5342 btstack_linked_list_iterator_t it; 5343 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5344 while (btstack_linked_list_iterator_has_next(&it)){ 5345 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5346 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5347 } 5348 } 5349 5350 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5351 if (!hci_stack->acl_packet_handler) return; 5352 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5353 } 5354 5355 #ifdef ENABLE_CLASSIC 5356 static void hci_notify_if_sco_can_send_now(void){ 5357 // notify SCO sender if waiting 5358 if (!hci_stack->sco_waiting_for_can_send_now) return; 5359 if (hci_can_send_sco_packet_now()){ 5360 hci_stack->sco_waiting_for_can_send_now = 0; 5361 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5362 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5363 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5364 } 5365 } 5366 5367 // parsing end emitting has been merged to reduce code size 5368 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5369 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5370 5371 uint8_t * eir_data; 5372 ad_context_t context; 5373 const uint8_t * name; 5374 uint8_t name_len; 5375 5376 if (size < 3) return; 5377 5378 int event_type = hci_event_packet_get_type(packet); 5379 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5380 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5381 5382 switch (event_type){ 5383 case HCI_EVENT_INQUIRY_RESULT: 5384 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5385 if (size != (3 + (num_responses * 14))) return; 5386 break; 5387 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5388 if (size != 257) return; 5389 if (num_responses != 1) return; 5390 break; 5391 default: 5392 return; 5393 } 5394 5395 // event[1] is set at the end 5396 int i; 5397 for (i=0; i<num_responses;i++){ 5398 memset(event, 0, sizeof(event)); 5399 event[0] = GAP_EVENT_INQUIRY_RESULT; 5400 uint8_t event_size = 27; // if name is not set by EIR 5401 5402 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5403 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5404 (void)memcpy(&event[9], 5405 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5406 3); // class of device 5407 (void)memcpy(&event[12], 5408 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5409 2); // clock offset 5410 5411 switch (event_type){ 5412 case HCI_EVENT_INQUIRY_RESULT: 5413 // 14,15,16,17 = 0, size 18 5414 break; 5415 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5416 event[14] = 1; 5417 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5418 // 16,17 = 0, size 18 5419 break; 5420 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5421 event[14] = 1; 5422 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5423 // EIR packets only contain a single inquiry response 5424 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5425 name = NULL; 5426 // Iterate over EIR data 5427 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5428 uint8_t data_type = ad_iterator_get_data_type(&context); 5429 uint8_t data_size = ad_iterator_get_data_len(&context); 5430 const uint8_t * data = ad_iterator_get_data(&context); 5431 // Prefer Complete Local Name over Shortened Local Name 5432 switch (data_type){ 5433 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5434 if (name) continue; 5435 /* fall through */ 5436 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5437 name = data; 5438 name_len = data_size; 5439 break; 5440 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5441 if (data_size != 8) break; 5442 event[16] = 1; 5443 memcpy(&event[17], data, 8); 5444 break; 5445 default: 5446 break; 5447 } 5448 } 5449 if (name){ 5450 event[25] = 1; 5451 // truncate name if needed 5452 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5453 event[26] = len; 5454 (void)memcpy(&event[27], name, len); 5455 event_size += len; 5456 } 5457 break; 5458 default: 5459 return; 5460 } 5461 event[1] = event_size - 2; 5462 hci_emit_event(event, event_size, 1); 5463 } 5464 } 5465 #endif 5466 5467 void hci_emit_state(void){ 5468 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5469 uint8_t event[3]; 5470 event[0] = BTSTACK_EVENT_STATE; 5471 event[1] = sizeof(event) - 2u; 5472 event[2] = hci_stack->state; 5473 hci_emit_event(event, sizeof(event), 1); 5474 } 5475 5476 #ifdef ENABLE_CLASSIC 5477 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5478 uint8_t event[13]; 5479 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5480 event[1] = sizeof(event) - 2; 5481 event[2] = status; 5482 little_endian_store_16(event, 3, con_handle); 5483 reverse_bd_addr(address, &event[5]); 5484 event[11] = 1; // ACL connection 5485 event[12] = 0; // encryption disabled 5486 hci_emit_event(event, sizeof(event), 1); 5487 } 5488 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5489 if (disable_l2cap_timeouts) return; 5490 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5491 uint8_t event[4]; 5492 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5493 event[1] = sizeof(event) - 2; 5494 little_endian_store_16(event, 2, conn->con_handle); 5495 hci_emit_event(event, sizeof(event), 1); 5496 } 5497 #endif 5498 5499 #ifdef ENABLE_BLE 5500 #ifdef ENABLE_LE_CENTRAL 5501 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){ 5502 uint8_t event[21]; 5503 event[0] = HCI_EVENT_LE_META; 5504 event[1] = sizeof(event) - 2u; 5505 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5506 event[3] = status; 5507 little_endian_store_16(event, 4, con_handle); 5508 event[6] = 0; // TODO: role 5509 event[7] = address_type; 5510 reverse_bd_addr(address, &event[8]); 5511 little_endian_store_16(event, 14, 0); // interval 5512 little_endian_store_16(event, 16, 0); // latency 5513 little_endian_store_16(event, 18, 0); // supervision timeout 5514 event[20] = 0; // master clock accuracy 5515 hci_emit_event(event, sizeof(event), 1); 5516 } 5517 #endif 5518 #endif 5519 5520 static void hci_emit_transport_packet_sent(void){ 5521 // notify upper stack that it might be possible to send again 5522 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5523 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5524 } 5525 5526 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5527 uint8_t event[6]; 5528 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5529 event[1] = sizeof(event) - 2u; 5530 event[2] = 0; // status = OK 5531 little_endian_store_16(event, 3, con_handle); 5532 event[5] = reason; 5533 hci_emit_event(event, sizeof(event), 1); 5534 } 5535 5536 static void hci_emit_nr_connections_changed(void){ 5537 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5538 uint8_t event[3]; 5539 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5540 event[1] = sizeof(event) - 2u; 5541 event[2] = nr_hci_connections(); 5542 hci_emit_event(event, sizeof(event), 1); 5543 } 5544 5545 static void hci_emit_hci_open_failed(void){ 5546 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5547 uint8_t event[2]; 5548 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5549 event[1] = sizeof(event) - 2u; 5550 hci_emit_event(event, sizeof(event), 1); 5551 } 5552 5553 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5554 log_info("hci_emit_dedicated_bonding_result %u ", status); 5555 uint8_t event[9]; 5556 int pos = 0; 5557 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5558 event[pos++] = sizeof(event) - 2u; 5559 event[pos++] = status; 5560 reverse_bd_addr(address, &event[pos]); 5561 hci_emit_event(event, sizeof(event), 1); 5562 } 5563 5564 5565 #ifdef ENABLE_CLASSIC 5566 5567 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5568 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5569 uint8_t event[5]; 5570 int pos = 0; 5571 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5572 event[pos++] = sizeof(event) - 2; 5573 little_endian_store_16(event, 2, con_handle); 5574 pos += 2; 5575 event[pos++] = level; 5576 hci_emit_event(event, sizeof(event), 1); 5577 } 5578 5579 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5580 if (!connection) return LEVEL_0; 5581 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5582 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5583 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5584 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5585 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5586 // LEVEL 4 always requires 128 bit encrytion key size 5587 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5588 security_level = LEVEL_3; 5589 } 5590 return security_level; 5591 } 5592 5593 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5594 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5595 uint8_t event[3]; 5596 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5597 event[1] = sizeof(event) - 2; 5598 event[2] = enabled; 5599 hci_emit_event(event, sizeof(event), 1); 5600 } 5601 5602 // query if remote side supports eSCO 5603 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5604 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5605 if (!connection) return false; 5606 return (connection->remote_supported_features[0] & 1) != 0; 5607 } 5608 5609 static bool hci_ssp_supported(hci_connection_t * connection){ 5610 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5611 return (connection->bonding_flags & mask) == mask; 5612 } 5613 5614 // query if remote side supports SSP 5615 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5616 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5617 if (!connection) return false; 5618 return hci_ssp_supported(connection) ? 1 : 0; 5619 } 5620 5621 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5622 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5623 } 5624 5625 /** 5626 * Check if remote supported features query has completed 5627 */ 5628 bool hci_remote_features_available(hci_con_handle_t handle){ 5629 hci_connection_t * connection = hci_connection_for_handle(handle); 5630 if (!connection) return false; 5631 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5632 } 5633 5634 /** 5635 * Trigger remote supported features query 5636 */ 5637 5638 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5639 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5640 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5641 } 5642 } 5643 5644 void hci_remote_features_query(hci_con_handle_t con_handle){ 5645 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5646 if (!connection) return; 5647 hci_trigger_remote_features_for_connection(connection); 5648 hci_run(); 5649 } 5650 5651 // GAP API 5652 /** 5653 * @bbrief enable/disable bonding. default is enabled 5654 * @praram enabled 5655 */ 5656 void gap_set_bondable_mode(int enable){ 5657 hci_stack->bondable = enable ? 1 : 0; 5658 } 5659 /** 5660 * @brief Get bondable mode. 5661 * @return 1 if bondable 5662 */ 5663 int gap_get_bondable_mode(void){ 5664 return hci_stack->bondable; 5665 } 5666 5667 /** 5668 * @brief map link keys to security levels 5669 */ 5670 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5671 switch (link_key_type){ 5672 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5673 return LEVEL_4; 5674 case COMBINATION_KEY: 5675 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5676 return LEVEL_3; 5677 default: 5678 return LEVEL_2; 5679 } 5680 } 5681 5682 /** 5683 * @brief map link keys to secure connection yes/no 5684 */ 5685 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5686 switch (link_key_type){ 5687 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5688 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5689 return 1; 5690 default: 5691 return 0; 5692 } 5693 } 5694 5695 /** 5696 * @brief map link keys to authenticated 5697 */ 5698 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5699 switch (link_key_type){ 5700 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5701 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5702 return 1; 5703 default: 5704 return 0; 5705 } 5706 } 5707 5708 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5709 log_info("gap_mitm_protection_required_for_security_level %u", level); 5710 return level > LEVEL_2; 5711 } 5712 5713 /** 5714 * @brief get current security level 5715 */ 5716 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5717 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5718 if (!connection) return LEVEL_0; 5719 return gap_security_level_for_connection(connection); 5720 } 5721 5722 /** 5723 * @brief request connection to device to 5724 * @result GAP_AUTHENTICATION_RESULT 5725 */ 5726 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5727 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5728 if (!connection){ 5729 hci_emit_security_level(con_handle, LEVEL_0); 5730 return; 5731 } 5732 5733 btstack_assert(hci_is_le_connection(connection) == false); 5734 5735 // 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) 5736 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5737 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5738 requested_level = LEVEL_4; 5739 } 5740 5741 gap_security_level_t current_level = gap_security_level(con_handle); 5742 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5743 requested_level, connection->requested_security_level, current_level); 5744 5745 // authentication active if authentication request was sent or planned level > 0 5746 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5747 if (authentication_active){ 5748 // authentication already active 5749 if (connection->requested_security_level < requested_level){ 5750 // increase requested level as new level is higher 5751 // TODO: handle re-authentication when done 5752 connection->requested_security_level = requested_level; 5753 } 5754 } else { 5755 // no request active, notify if security sufficient 5756 if (requested_level <= current_level){ 5757 hci_emit_security_level(con_handle, current_level); 5758 return; 5759 } 5760 5761 // store request 5762 connection->requested_security_level = requested_level; 5763 5764 // request remote features if not already active 5765 hci_remote_features_query(con_handle); 5766 5767 // start to authenticate connection 5768 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5769 hci_run(); 5770 } 5771 } 5772 5773 /** 5774 * @brief start dedicated bonding with device. disconnect after bonding 5775 * @param device 5776 * @param request MITM protection 5777 * @result GAP_DEDICATED_BONDING_COMPLETE 5778 */ 5779 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5780 5781 // create connection state machine 5782 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5783 5784 if (!connection){ 5785 return BTSTACK_MEMORY_ALLOC_FAILED; 5786 } 5787 5788 // delete linkn key 5789 gap_drop_link_key_for_bd_addr(device); 5790 5791 // configure LEVEL_2/3, dedicated bonding 5792 connection->state = SEND_CREATE_CONNECTION; 5793 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5794 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5795 connection->bonding_flags = BONDING_DEDICATED; 5796 5797 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5798 5799 // handle: connnection failure (connection complete != ok) 5800 // handle: authentication failure 5801 // handle: disconnect on done 5802 5803 hci_run(); 5804 5805 return 0; 5806 } 5807 5808 void gap_set_local_name(const char * local_name){ 5809 hci_stack->local_name = local_name; 5810 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5811 // also update EIR if not set by user 5812 if (hci_stack->eir_data == NULL){ 5813 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5814 } 5815 hci_run(); 5816 } 5817 #endif 5818 5819 5820 #ifdef ENABLE_BLE 5821 5822 #ifdef ENABLE_LE_CENTRAL 5823 void gap_start_scan(void){ 5824 hci_stack->le_scanning_enabled = true; 5825 hci_run(); 5826 } 5827 5828 void gap_stop_scan(void){ 5829 hci_stack->le_scanning_enabled = false; 5830 hci_run(); 5831 } 5832 5833 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5834 hci_stack->le_scan_type = scan_type; 5835 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5836 hci_stack->le_scan_interval = scan_interval; 5837 hci_stack->le_scan_window = scan_window; 5838 hci_stack->le_scanning_param_update = true; 5839 hci_run(); 5840 } 5841 5842 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5843 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5844 } 5845 5846 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5847 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5848 if (!conn){ 5849 // disallow if le connection is already outgoing 5850 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5851 log_error("le connection already active"); 5852 return ERROR_CODE_COMMAND_DISALLOWED; 5853 } 5854 5855 log_info("gap_connect: no connection exists yet, creating context"); 5856 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5857 if (!conn){ 5858 // notify client that alloc failed 5859 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5860 log_info("gap_connect: failed to alloc hci_connection_t"); 5861 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5862 } 5863 5864 // set le connecting state 5865 if (hci_is_le_connection_type(addr_type)){ 5866 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5867 } 5868 5869 conn->state = SEND_CREATE_CONNECTION; 5870 log_info("gap_connect: send create connection next"); 5871 hci_run(); 5872 return ERROR_CODE_SUCCESS; 5873 } 5874 5875 if (!hci_is_le_connection(conn) || 5876 (conn->state == SEND_CREATE_CONNECTION) || 5877 (conn->state == SENT_CREATE_CONNECTION)) { 5878 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5879 log_error("gap_connect: classic connection or connect is already being created"); 5880 return GATT_CLIENT_IN_WRONG_STATE; 5881 } 5882 5883 // check if connection was just disconnected 5884 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5885 log_info("gap_connect: send create connection (again)"); 5886 conn->state = SEND_CREATE_CONNECTION; 5887 hci_run(); 5888 return ERROR_CODE_SUCCESS; 5889 } 5890 5891 log_info("gap_connect: context exists with state %u", conn->state); 5892 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5893 hci_run(); 5894 return ERROR_CODE_SUCCESS; 5895 } 5896 5897 // @assumption: only a single outgoing LE Connection exists 5898 static hci_connection_t * gap_get_outgoing_connection(void){ 5899 btstack_linked_item_t *it; 5900 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5901 hci_connection_t * conn = (hci_connection_t *) it; 5902 if (!hci_is_le_connection(conn)) continue; 5903 switch (conn->state){ 5904 case SEND_CREATE_CONNECTION: 5905 case SENT_CREATE_CONNECTION: 5906 case SENT_CANCEL_CONNECTION: 5907 return conn; 5908 default: 5909 break; 5910 }; 5911 } 5912 return NULL; 5913 } 5914 5915 uint8_t gap_connect_cancel(void){ 5916 hci_connection_t * conn = gap_get_outgoing_connection(); 5917 if (!conn) return 0; 5918 switch (conn->state){ 5919 case SEND_CREATE_CONNECTION: 5920 // skip sending create connection and emit event instead 5921 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5922 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5923 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5924 btstack_memory_hci_connection_free( conn ); 5925 break; 5926 case SENT_CREATE_CONNECTION: 5927 // request to send cancel connection 5928 conn->state = SEND_CANCEL_CONNECTION; 5929 hci_run(); 5930 break; 5931 default: 5932 break; 5933 } 5934 return 0; 5935 } 5936 #endif 5937 5938 #ifdef ENABLE_LE_CENTRAL 5939 /** 5940 * @brief Set connection parameters for outgoing connections 5941 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5942 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5943 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5944 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5945 * @param conn_latency, default: 4 5946 * @param supervision_timeout (unit: 10ms), default: 720 ms 5947 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5948 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5949 */ 5950 5951 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5952 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5953 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5954 hci_stack->le_connection_scan_interval = conn_scan_interval; 5955 hci_stack->le_connection_scan_window = conn_scan_window; 5956 hci_stack->le_connection_interval_min = conn_interval_min; 5957 hci_stack->le_connection_interval_max = conn_interval_max; 5958 hci_stack->le_connection_latency = conn_latency; 5959 hci_stack->le_supervision_timeout = supervision_timeout; 5960 hci_stack->le_minimum_ce_length = min_ce_length; 5961 hci_stack->le_maximum_ce_length = max_ce_length; 5962 } 5963 #endif 5964 5965 /** 5966 * @brief Updates the connection parameters for a given LE connection 5967 * @param handle 5968 * @param conn_interval_min (unit: 1.25ms) 5969 * @param conn_interval_max (unit: 1.25ms) 5970 * @param conn_latency 5971 * @param supervision_timeout (unit: 10ms) 5972 * @return 0 if ok 5973 */ 5974 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5975 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5976 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5977 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5978 connection->le_conn_interval_min = conn_interval_min; 5979 connection->le_conn_interval_max = conn_interval_max; 5980 connection->le_conn_latency = conn_latency; 5981 connection->le_supervision_timeout = supervision_timeout; 5982 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5983 hci_run(); 5984 return 0; 5985 } 5986 5987 /** 5988 * @brief Request an update of the connection parameter for a given LE connection 5989 * @param handle 5990 * @param conn_interval_min (unit: 1.25ms) 5991 * @param conn_interval_max (unit: 1.25ms) 5992 * @param conn_latency 5993 * @param supervision_timeout (unit: 10ms) 5994 * @return 0 if ok 5995 */ 5996 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5997 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5998 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5999 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6000 connection->le_conn_interval_min = conn_interval_min; 6001 connection->le_conn_interval_max = conn_interval_max; 6002 connection->le_conn_latency = conn_latency; 6003 connection->le_supervision_timeout = supervision_timeout; 6004 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6005 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6006 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6007 return 0; 6008 } 6009 6010 #ifdef ENABLE_LE_PERIPHERAL 6011 6012 /** 6013 * @brief Set Advertisement Data 6014 * @param advertising_data_length 6015 * @param advertising_data (max 31 octets) 6016 * @note data is not copied, pointer has to stay valid 6017 */ 6018 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6019 hci_stack->le_advertisements_data_len = advertising_data_length; 6020 hci_stack->le_advertisements_data = advertising_data; 6021 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6022 hci_run(); 6023 } 6024 6025 /** 6026 * @brief Set Scan Response Data 6027 * @param advertising_data_length 6028 * @param advertising_data (max 31 octets) 6029 * @note data is not copied, pointer has to stay valid 6030 */ 6031 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6032 hci_stack->le_scan_response_data_len = scan_response_data_length; 6033 hci_stack->le_scan_response_data = scan_response_data; 6034 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6035 hci_run(); 6036 } 6037 6038 /** 6039 * @brief Set Advertisement Parameters 6040 * @param adv_int_min 6041 * @param adv_int_max 6042 * @param adv_type 6043 * @param direct_address_type 6044 * @param direct_address 6045 * @param channel_map 6046 * @param filter_policy 6047 * 6048 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6049 */ 6050 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6051 uint8_t direct_address_typ, bd_addr_t direct_address, 6052 uint8_t channel_map, uint8_t filter_policy) { 6053 6054 hci_stack->le_advertisements_interval_min = adv_int_min; 6055 hci_stack->le_advertisements_interval_max = adv_int_max; 6056 hci_stack->le_advertisements_type = adv_type; 6057 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6058 hci_stack->le_advertisements_channel_map = channel_map; 6059 hci_stack->le_advertisements_filter_policy = filter_policy; 6060 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6061 6); 6062 6063 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6064 hci_run(); 6065 } 6066 6067 /** 6068 * @brief Enable/Disable Advertisements 6069 * @param enabled 6070 */ 6071 void gap_advertisements_enable(int enabled){ 6072 hci_stack->le_advertisements_enabled = enabled != 0; 6073 hci_update_advertisements_enabled_for_current_roles(); 6074 hci_run(); 6075 } 6076 6077 #endif 6078 6079 void hci_le_set_own_address_type(uint8_t own_address_type){ 6080 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6081 if (own_address_type == hci_stack->le_own_addr_type) return; 6082 hci_stack->le_own_addr_type = own_address_type; 6083 6084 #ifdef ENABLE_LE_PERIPHERAL 6085 // update advertisement parameters, too 6086 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6087 hci_run(); 6088 #endif 6089 #ifdef ENABLE_LE_CENTRAL 6090 // note: we don't update scan parameters or modify ongoing connection attempts 6091 #endif 6092 } 6093 6094 void hci_le_random_address_set(const bd_addr_t random_address){ 6095 memcpy(hci_stack->le_random_address, random_address, 6); 6096 hci_stack->le_random_address_set = true; 6097 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6098 hci_run(); 6099 } 6100 6101 #endif 6102 6103 uint8_t gap_disconnect(hci_con_handle_t handle){ 6104 hci_connection_t * conn = hci_connection_for_handle(handle); 6105 if (!conn){ 6106 hci_emit_disconnection_complete(handle, 0); 6107 return 0; 6108 } 6109 // ignore if already disconnected 6110 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6111 return 0; 6112 } 6113 conn->state = SEND_DISCONNECT; 6114 hci_run(); 6115 return 0; 6116 } 6117 6118 int gap_read_rssi(hci_con_handle_t con_handle){ 6119 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6120 if (hci_connection == NULL) return 0; 6121 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6122 hci_run(); 6123 return 1; 6124 } 6125 6126 /** 6127 * @brief Get connection type 6128 * @param con_handle 6129 * @result connection_type 6130 */ 6131 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6132 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6133 if (!conn) return GAP_CONNECTION_INVALID; 6134 switch (conn->address_type){ 6135 case BD_ADDR_TYPE_LE_PUBLIC: 6136 case BD_ADDR_TYPE_LE_RANDOM: 6137 return GAP_CONNECTION_LE; 6138 case BD_ADDR_TYPE_SCO: 6139 return GAP_CONNECTION_SCO; 6140 case BD_ADDR_TYPE_ACL: 6141 return GAP_CONNECTION_ACL; 6142 default: 6143 return GAP_CONNECTION_INVALID; 6144 } 6145 } 6146 6147 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6148 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6149 if (!conn) return HCI_ROLE_INVALID; 6150 return (hci_role_t) conn->role; 6151 } 6152 6153 6154 #ifdef ENABLE_CLASSIC 6155 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6156 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6157 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6158 conn->request_role = role; 6159 hci_run(); 6160 return ERROR_CODE_SUCCESS; 6161 } 6162 #endif 6163 6164 #ifdef ENABLE_BLE 6165 6166 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){ 6167 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6168 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6169 6170 conn->le_phy_update_all_phys = all_phys; 6171 conn->le_phy_update_tx_phys = tx_phys; 6172 conn->le_phy_update_rx_phys = rx_phys; 6173 conn->le_phy_update_phy_options = phy_options; 6174 6175 hci_run(); 6176 6177 return 0; 6178 } 6179 6180 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6181 // check if already in list 6182 btstack_linked_list_iterator_t it; 6183 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6184 while (btstack_linked_list_iterator_has_next(&it)) { 6185 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6186 if (entry->address_type != address_type) { 6187 continue; 6188 } 6189 if (memcmp(entry->address, address, 6) != 0) { 6190 continue; 6191 } 6192 // disallow if already scheduled to add 6193 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6194 return ERROR_CODE_COMMAND_DISALLOWED; 6195 } 6196 // still on controller, but scheduled to remove -> re-add 6197 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6198 return ERROR_CODE_SUCCESS; 6199 } 6200 // alloc and add to list 6201 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6202 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6203 entry->address_type = address_type; 6204 (void)memcpy(entry->address, address, 6); 6205 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6206 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6207 return ERROR_CODE_SUCCESS; 6208 } 6209 6210 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6211 btstack_linked_list_iterator_t it; 6212 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6213 while (btstack_linked_list_iterator_has_next(&it)){ 6214 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6215 if (entry->address_type != address_type) { 6216 continue; 6217 } 6218 if (memcmp(entry->address, address, 6) != 0) { 6219 continue; 6220 } 6221 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6222 // remove from controller if already present 6223 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6224 } else { 6225 // directly remove entry from whitelist 6226 btstack_linked_list_iterator_remove(&it); 6227 btstack_memory_whitelist_entry_free(entry); 6228 } 6229 return ERROR_CODE_SUCCESS; 6230 } 6231 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6232 } 6233 6234 static void hci_whitelist_clear(void){ 6235 btstack_linked_list_iterator_t it; 6236 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6237 while (btstack_linked_list_iterator_has_next(&it)){ 6238 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6239 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6240 // remove from controller if already present 6241 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6242 continue; 6243 } 6244 // directly remove entry from whitelist 6245 btstack_linked_list_iterator_remove(&it); 6246 btstack_memory_whitelist_entry_free(entry); 6247 } 6248 } 6249 6250 // free all entries unconditionally 6251 static void hci_whitelist_free(void){ 6252 btstack_linked_list_iterator_t lit; 6253 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6254 while (btstack_linked_list_iterator_has_next(&lit)){ 6255 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6256 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6257 btstack_memory_whitelist_entry_free(entry); 6258 } 6259 } 6260 6261 /** 6262 * @brief Clear Whitelist 6263 * @return 0 if ok 6264 */ 6265 uint8_t gap_whitelist_clear(void){ 6266 hci_whitelist_clear(); 6267 hci_run(); 6268 return ERROR_CODE_SUCCESS; 6269 } 6270 6271 /** 6272 * @brief Add Device to Whitelist 6273 * @param address_typ 6274 * @param address 6275 * @return 0 if ok 6276 */ 6277 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6278 uint8_t status = hci_whitelist_add(address_type, address); 6279 if (status){ 6280 return status; 6281 } 6282 hci_run(); 6283 return ERROR_CODE_SUCCESS; 6284 } 6285 6286 /** 6287 * @brief Remove Device from Whitelist 6288 * @param address_typ 6289 * @param address 6290 * @return 0 if ok 6291 */ 6292 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6293 uint8_t status = hci_whitelist_remove(address_type, address); 6294 if (status){ 6295 return status; 6296 } 6297 hci_run(); 6298 return ERROR_CODE_SUCCESS; 6299 } 6300 6301 #ifdef ENABLE_LE_CENTRAL 6302 /** 6303 * @brief Connect with Whitelist 6304 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6305 * @return - if ok 6306 */ 6307 uint8_t gap_connect_with_whitelist(void){ 6308 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6309 return ERROR_CODE_COMMAND_DISALLOWED; 6310 } 6311 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6312 hci_run(); 6313 return ERROR_CODE_SUCCESS; 6314 } 6315 6316 /** 6317 * @brief Auto Connection Establishment - Start Connecting to device 6318 * @param address_typ 6319 * @param address 6320 * @return 0 if ok 6321 */ 6322 uint8_t gap_auto_connection_start(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 uint8_t status = hci_whitelist_add(address_type, address); 6328 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6329 return status; 6330 } 6331 6332 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6333 6334 hci_run(); 6335 return ERROR_CODE_SUCCESS; 6336 } 6337 6338 /** 6339 * @brief Auto Connection Establishment - Stop Connecting to device 6340 * @param address_typ 6341 * @param address 6342 * @return 0 if ok 6343 */ 6344 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6345 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6346 return ERROR_CODE_COMMAND_DISALLOWED; 6347 } 6348 6349 hci_whitelist_remove(address_type, address); 6350 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6351 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6352 } 6353 hci_run(); 6354 return 0; 6355 } 6356 6357 /** 6358 * @brief Auto Connection Establishment - Stop everything 6359 * @note Convenience function to stop all active auto connection attempts 6360 */ 6361 uint8_t gap_auto_connection_stop_all(void){ 6362 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6363 return ERROR_CODE_COMMAND_DISALLOWED; 6364 } 6365 hci_whitelist_clear(); 6366 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6367 hci_run(); 6368 return ERROR_CODE_SUCCESS; 6369 } 6370 6371 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6372 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6373 if (!conn) return 0; 6374 return conn->le_connection_interval; 6375 } 6376 #endif 6377 #endif 6378 6379 #ifdef ENABLE_CLASSIC 6380 /** 6381 * @brief Set Extended Inquiry Response data 6382 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6383 * @note has to be done before stack starts up 6384 */ 6385 void gap_set_extended_inquiry_response(const uint8_t * data){ 6386 hci_stack->eir_data = data; 6387 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6388 hci_run(); 6389 } 6390 6391 /** 6392 * @brief Start GAP Classic Inquiry 6393 * @param duration in 1.28s units 6394 * @return 0 if ok 6395 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6396 */ 6397 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6398 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6399 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6400 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6401 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6402 } 6403 hci_stack->inquiry_state = duration_in_1280ms_units; 6404 hci_run(); 6405 return 0; 6406 } 6407 6408 /** 6409 * @brief Stop GAP Classic Inquiry 6410 * @return 0 if ok 6411 */ 6412 int gap_inquiry_stop(void){ 6413 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6414 // emit inquiry complete event, before it even started 6415 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6416 hci_emit_event(event, sizeof(event), 1); 6417 return 0; 6418 } 6419 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6420 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6421 hci_run(); 6422 return 0; 6423 } 6424 6425 void gap_inquiry_set_lap(uint32_t lap){ 6426 hci_stack->inquiry_lap = lap; 6427 } 6428 6429 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6430 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6431 hci_stack->inquiry_scan_window = inquiry_scan_window; 6432 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6433 hci_run(); 6434 } 6435 6436 6437 /** 6438 * @brief Remote Name Request 6439 * @param addr 6440 * @param page_scan_repetition_mode 6441 * @param clock_offset only used when bit 15 is set 6442 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6443 */ 6444 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6445 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6446 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6447 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6448 hci_stack->remote_name_clock_offset = clock_offset; 6449 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6450 hci_run(); 6451 return 0; 6452 } 6453 6454 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6455 hci_stack->gap_pairing_state = state; 6456 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6457 hci_run(); 6458 return 0; 6459 } 6460 6461 /** 6462 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6463 * @param addr 6464 * @param pin_data 6465 * @param pin_len 6466 * @return 0 if ok 6467 */ 6468 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6469 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6470 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6471 hci_stack->gap_pairing_pin_len = pin_len; 6472 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6473 } 6474 6475 /** 6476 * @brief Legacy Pairing Pin Code Response 6477 * @param addr 6478 * @param pin 6479 * @return 0 if ok 6480 */ 6481 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6482 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6483 } 6484 6485 /** 6486 * @brief Abort Legacy Pairing 6487 * @param addr 6488 * @param pin 6489 * @return 0 if ok 6490 */ 6491 int gap_pin_code_negative(bd_addr_t addr){ 6492 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6493 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6494 } 6495 6496 /** 6497 * @brief SSP Passkey Response 6498 * @param addr 6499 * @param passkey 6500 * @return 0 if ok 6501 */ 6502 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6503 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6504 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6505 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6506 } 6507 6508 /** 6509 * @brief Abort SSP Passkey Entry/Pairing 6510 * @param addr 6511 * @param pin 6512 * @return 0 if ok 6513 */ 6514 int gap_ssp_passkey_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_PASSKEY_NEGATIVE); 6517 } 6518 6519 /** 6520 * @brief Accept SSP Numeric Comparison 6521 * @param addr 6522 * @param passkey 6523 * @return 0 if ok 6524 */ 6525 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6526 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6527 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6528 } 6529 6530 /** 6531 * @brief Abort SSP Numeric Comparison/Pairing 6532 * @param addr 6533 * @param pin 6534 * @return 0 if ok 6535 */ 6536 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6537 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6538 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6539 } 6540 6541 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6542 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6543 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6544 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6545 connectionSetAuthenticationFlags(conn, flag); 6546 hci_run(); 6547 return ERROR_CODE_SUCCESS; 6548 } 6549 #endif 6550 6551 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6552 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6553 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6554 } 6555 6556 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6557 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6558 } 6559 #endif 6560 6561 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6562 /** 6563 * @brief Report Remote OOB Data 6564 * @param bd_addr 6565 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6566 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6567 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6568 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6569 */ 6570 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){ 6571 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6572 if (connection == NULL) { 6573 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6574 } 6575 connection->classic_oob_c_192 = c_192; 6576 connection->classic_oob_r_192 = r_192; 6577 6578 // ignore P-256 if not supported by us 6579 if (hci_stack->secure_connections_active){ 6580 connection->classic_oob_c_256 = c_256; 6581 connection->classic_oob_r_256 = r_256; 6582 } 6583 6584 return ERROR_CODE_SUCCESS; 6585 } 6586 /** 6587 * @brief Generate new OOB data 6588 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6589 */ 6590 void gap_ssp_generate_oob_data(void){ 6591 hci_stack->classic_read_local_oob_data = true; 6592 hci_run(); 6593 } 6594 6595 #endif 6596 6597 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6598 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6599 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6600 if (connection == NULL) { 6601 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6602 } 6603 6604 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6605 connection->link_key_type = type; 6606 6607 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6608 } 6609 6610 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6611 /** 6612 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6613 * @param inquiry_mode see bluetooth_defines.h 6614 */ 6615 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6616 hci_stack->inquiry_mode = inquiry_mode; 6617 } 6618 6619 /** 6620 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6621 */ 6622 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6623 hci_stack->sco_voice_setting = voice_setting; 6624 } 6625 6626 /** 6627 * @brief Get SCO Voice Setting 6628 * @return current voice setting 6629 */ 6630 uint16_t hci_get_sco_voice_setting(void){ 6631 return hci_stack->sco_voice_setting; 6632 } 6633 6634 static int hci_have_usb_transport(void){ 6635 if (!hci_stack->hci_transport) return 0; 6636 const char * transport_name = hci_stack->hci_transport->name; 6637 if (!transport_name) return 0; 6638 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6639 } 6640 6641 /** @brief Get SCO packet length for current SCO Voice setting 6642 * @note Using SCO packets of the exact length is required for USB transfer 6643 * @return Length of SCO packets in bytes (not audio frames) 6644 */ 6645 uint16_t hci_get_sco_packet_length(void){ 6646 uint16_t sco_packet_length = 0; 6647 6648 #ifdef ENABLE_SCO_OVER_HCI 6649 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6650 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6651 6652 if (hci_have_usb_transport()){ 6653 // see Core Spec for H2 USB Transfer. 6654 // 3 byte SCO header + 24 bytes per connection 6655 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6656 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6657 } else { 6658 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6659 sco_packet_length = 3 + 60 * multiplier; 6660 // assert that it still fits inside an SCO buffer 6661 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6662 sco_packet_length = 3 + 60; 6663 } 6664 } 6665 #endif 6666 6667 #ifdef HAVE_SCO_TRANSPORT 6668 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6669 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6670 sco_packet_length = 3 + 60 * multiplier; 6671 #endif 6672 return sco_packet_length; 6673 } 6674 6675 /** 6676 * @brief Sets the master/slave policy 6677 * @param policy (0: attempt to become master, 1: let connecting device decide) 6678 */ 6679 void hci_set_master_slave_policy(uint8_t policy){ 6680 hci_stack->master_slave_policy = policy; 6681 } 6682 6683 #endif 6684 6685 HCI_STATE hci_get_state(void){ 6686 return hci_stack->state; 6687 } 6688 6689 #ifdef ENABLE_CLASSIC 6690 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6691 hci_stack->gap_classic_accept_callback = accept_callback; 6692 } 6693 #endif 6694 6695 /** 6696 * @brief Set callback for Bluetooth Hardware Error 6697 */ 6698 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6699 hci_stack->hardware_error_callback = fn; 6700 } 6701 6702 void hci_disconnect_all(void){ 6703 btstack_linked_list_iterator_t it; 6704 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6705 while (btstack_linked_list_iterator_has_next(&it)){ 6706 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6707 if (con->state == SENT_DISCONNECT) continue; 6708 con->state = SEND_DISCONNECT; 6709 } 6710 hci_run(); 6711 } 6712 6713 uint16_t hci_get_manufacturer(void){ 6714 return hci_stack->manufacturer; 6715 } 6716 6717 #ifdef ENABLE_BLE 6718 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6719 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6720 if (!hci_con) return NULL; 6721 return &hci_con->sm_connection; 6722 } 6723 6724 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6725 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6726 #endif 6727 6728 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6730 if (hci_connection == NULL) return 0; 6731 if (hci_is_le_connection(hci_connection)){ 6732 #ifdef ENABLE_BLE 6733 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6734 if (sm_conn->sm_connection_encrypted) { 6735 return sm_conn->sm_actual_encryption_key_size; 6736 } 6737 #endif 6738 } else { 6739 #ifdef ENABLE_CLASSIC 6740 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6741 return hci_connection->encryption_key_size; 6742 } 6743 #endif 6744 } 6745 return 0; 6746 } 6747 6748 int gap_authenticated(hci_con_handle_t con_handle){ 6749 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6750 if (hci_connection == NULL) return 0; 6751 6752 switch (hci_connection->address_type){ 6753 #ifdef ENABLE_BLE 6754 case BD_ADDR_TYPE_LE_PUBLIC: 6755 case BD_ADDR_TYPE_LE_RANDOM: 6756 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6757 return hci_connection->sm_connection.sm_connection_authenticated; 6758 #endif 6759 #ifdef ENABLE_CLASSIC 6760 case BD_ADDR_TYPE_SCO: 6761 case BD_ADDR_TYPE_ACL: 6762 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6763 #endif 6764 default: 6765 return 0; 6766 } 6767 } 6768 6769 int gap_secure_connection(hci_con_handle_t con_handle){ 6770 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6771 if (hci_connection == NULL) return 0; 6772 6773 switch (hci_connection->address_type){ 6774 #ifdef ENABLE_BLE 6775 case BD_ADDR_TYPE_LE_PUBLIC: 6776 case BD_ADDR_TYPE_LE_RANDOM: 6777 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6778 return hci_connection->sm_connection.sm_connection_sc; 6779 #endif 6780 #ifdef ENABLE_CLASSIC 6781 case BD_ADDR_TYPE_SCO: 6782 case BD_ADDR_TYPE_ACL: 6783 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6784 #endif 6785 default: 6786 return 0; 6787 } 6788 } 6789 6790 bool gap_bonded(hci_con_handle_t con_handle){ 6791 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6792 if (hci_connection == NULL) return 0; 6793 6794 #ifdef ENABLE_CLASSIC 6795 link_key_t link_key; 6796 link_key_type_t link_key_type; 6797 #endif 6798 switch (hci_connection->address_type){ 6799 #ifdef ENABLE_BLE 6800 case BD_ADDR_TYPE_LE_PUBLIC: 6801 case BD_ADDR_TYPE_LE_RANDOM: 6802 return hci_connection->sm_connection.sm_le_db_index >= 0; 6803 #endif 6804 #ifdef ENABLE_CLASSIC 6805 case BD_ADDR_TYPE_SCO: 6806 case BD_ADDR_TYPE_ACL: 6807 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6808 #endif 6809 default: 6810 return false; 6811 } 6812 } 6813 6814 #ifdef ENABLE_BLE 6815 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6816 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6817 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6818 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6819 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6820 return sm_conn->sm_connection_authorization_state; 6821 } 6822 #endif 6823 6824 #ifdef ENABLE_CLASSIC 6825 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){ 6826 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6827 if (!conn) return GAP_CONNECTION_INVALID; 6828 conn->sniff_min_interval = sniff_min_interval; 6829 conn->sniff_max_interval = sniff_max_interval; 6830 conn->sniff_attempt = sniff_attempt; 6831 conn->sniff_timeout = sniff_timeout; 6832 hci_run(); 6833 return 0; 6834 } 6835 6836 /** 6837 * @brief Exit Sniff mode 6838 * @param con_handle 6839 @ @return 0 if ok 6840 */ 6841 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6842 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6843 if (!conn) return GAP_CONNECTION_INVALID; 6844 conn->sniff_min_interval = 0xffff; 6845 hci_run(); 6846 return 0; 6847 } 6848 6849 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){ 6850 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6851 if (!conn) return GAP_CONNECTION_INVALID; 6852 conn->sniff_subrating_max_latency = max_latency; 6853 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6854 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6855 hci_run(); 6856 return ERROR_CODE_SUCCESS; 6857 } 6858 6859 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){ 6860 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6861 if (!conn) return GAP_CONNECTION_INVALID; 6862 conn->qos_service_type = service_type; 6863 conn->qos_token_rate = token_rate; 6864 conn->qos_peak_bandwidth = peak_bandwidth; 6865 conn->qos_latency = latency; 6866 conn->qos_delay_variation = delay_variation; 6867 hci_run(); 6868 return ERROR_CODE_SUCCESS; 6869 } 6870 6871 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6872 hci_stack->new_page_scan_interval = page_scan_interval; 6873 hci_stack->new_page_scan_window = page_scan_window; 6874 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6875 hci_run(); 6876 } 6877 6878 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6879 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6880 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6881 hci_run(); 6882 } 6883 6884 void gap_set_page_timeout(uint16_t page_timeout){ 6885 hci_stack->page_timeout = page_timeout; 6886 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6887 hci_run(); 6888 } 6889 6890 #endif 6891 6892 void hci_halting_defer(void){ 6893 if (hci_stack->state != HCI_STATE_HALTING) return; 6894 switch (hci_stack->substate){ 6895 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6896 case HCI_HALTING_CLOSE: 6897 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6898 break; 6899 default: 6900 break; 6901 } 6902 } 6903 6904 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6905 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6906 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6907 if (le_device_db_index >= le_device_db_max_count()) return; 6908 uint8_t offset = le_device_db_index >> 3; 6909 uint8_t mask = 1 << (le_device_db_index & 7); 6910 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6911 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6912 // note: go back to remove entries, otherwise, a remove + add will skip the add 6913 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6914 } 6915 } 6916 6917 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6918 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6919 if (le_device_db_index >= le_device_db_max_count()) return; 6920 uint8_t offset = le_device_db_index >> 3; 6921 uint8_t mask = 1 << (le_device_db_index & 7); 6922 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6923 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6924 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6925 } 6926 } 6927 6928 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6929 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6930 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6931 } 6932 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6933 // restart le resolving list update 6934 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6935 } 6936 return ERROR_CODE_SUCCESS; 6937 } 6938 #endif 6939 6940 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6941 void hci_setup_test_connections_fuzz(void){ 6942 hci_connection_t * conn; 6943 6944 // default address: 66:55:44:33:00:01 6945 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6946 6947 // setup Controller info 6948 hci_stack->num_cmd_packets = 255; 6949 hci_stack->acl_packets_total_num = 255; 6950 6951 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6952 addr[5] = 0x01; 6953 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6954 conn->con_handle = addr[5]; 6955 conn->role = HCI_ROLE_SLAVE; 6956 conn->state = RECEIVED_CONNECTION_REQUEST; 6957 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6958 6959 // setup incoming Classic SCO connection with con handle 0x0002 6960 addr[5] = 0x02; 6961 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6962 conn->con_handle = addr[5]; 6963 conn->role = HCI_ROLE_SLAVE; 6964 conn->state = RECEIVED_CONNECTION_REQUEST; 6965 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6966 6967 // setup ready Classic ACL connection with con handle 0x0003 6968 addr[5] = 0x03; 6969 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6970 conn->con_handle = addr[5]; 6971 conn->role = HCI_ROLE_SLAVE; 6972 conn->state = OPEN; 6973 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6974 6975 // setup ready Classic SCO connection with con handle 0x0004 6976 addr[5] = 0x04; 6977 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6978 conn->con_handle = addr[5]; 6979 conn->role = HCI_ROLE_SLAVE; 6980 conn->state = OPEN; 6981 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6982 6983 // setup ready LE ACL connection with con handle 0x005 and public address 6984 addr[5] = 0x05; 6985 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6986 conn->con_handle = addr[5]; 6987 conn->role = HCI_ROLE_SLAVE; 6988 conn->state = OPEN; 6989 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6990 conn->sm_connection.sm_connection_encrypted = 1; 6991 } 6992 6993 void hci_free_connections_fuzz(void){ 6994 btstack_linked_list_iterator_t it; 6995 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6996 while (btstack_linked_list_iterator_has_next(&it)){ 6997 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6998 btstack_linked_list_iterator_remove(&it); 6999 btstack_memory_hci_connection_free(con); 7000 } 7001 } 7002 void hci_simulate_working_fuzz(void){ 7003 hci_init_done(); 7004 hci_stack->num_cmd_packets = 255; 7005 } 7006 #endif 7007