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); 165 166 #ifdef ENABLE_CLASSIC 167 static int hci_have_usb_transport(void); 168 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection); 169 #endif 170 171 #ifdef ENABLE_BLE 172 #ifdef ENABLE_LE_CENTRAL 173 // called from test/ble_client/advertising_data_parser.c 174 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 175 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 176 static void hci_whitelist_free(void); 177 static hci_connection_t * gap_get_outgoing_connection(void); 178 #endif 179 #endif 180 181 // the STACK is here 182 #ifndef HAVE_MALLOC 183 static hci_stack_t hci_stack_static; 184 #endif 185 static hci_stack_t * hci_stack = NULL; 186 187 #ifdef ENABLE_CLASSIC 188 // default name 189 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 190 191 // test helper 192 static uint8_t disable_l2cap_timeouts = 0; 193 #endif 194 195 // reset connection state on create and on reconnect 196 // don't overwrite addr, con handle, role 197 static void hci_connection_init(hci_connection_t * conn){ 198 conn->authentication_flags = AUTH_FLAG_NONE; 199 conn->bonding_flags = 0; 200 conn->requested_security_level = LEVEL_0; 201 #ifdef ENABLE_CLASSIC 202 conn->request_role = HCI_ROLE_INVALID; 203 conn->sniff_subrating_max_latency = 0xffff; 204 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 205 conn->link_key_type = INVALID_LINK_KEY; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 #ifdef ENABLE_CLASSIC_PAIRING_OOB 222 conn->classic_oob_c_192 = NULL; 223 conn->classic_oob_r_192 = NULL; 224 conn->classic_oob_c_256 = NULL; 225 conn->classic_oob_r_256 = NULL; 226 #endif 227 } 228 229 /** 230 * create connection for given address 231 * 232 * @return connection OR NULL, if no memory left 233 */ 234 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 235 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 236 237 hci_connection_t * conn = btstack_memory_hci_connection_get(); 238 if (!conn) return NULL; 239 hci_connection_init(conn); 240 241 bd_addr_copy(conn->address, addr); 242 conn->address_type = addr_type; 243 conn->con_handle = HCI_CON_HANDLE_INVALID; 244 conn->role = HCI_ROLE_INVALID; 245 246 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 247 248 return conn; 249 } 250 251 252 /** 253 * get le connection parameter range 254 * 255 * @return le connection parameter range struct 256 */ 257 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 258 *range = hci_stack->le_connection_parameter_range; 259 } 260 261 /** 262 * set le connection parameter range 263 * 264 */ 265 266 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 267 hci_stack->le_connection_parameter_range = *range; 268 } 269 270 /** 271 * @brief Test if connection parameters are inside in existing rage 272 * @param conn_interval_min (unit: 1.25ms) 273 * @param conn_interval_max (unit: 1.25ms) 274 * @param conn_latency 275 * @param supervision_timeout (unit: 10ms) 276 * @return 1 if included 277 */ 278 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){ 279 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 280 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 281 282 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 283 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 284 285 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 286 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 287 288 return 1; 289 } 290 291 /** 292 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 293 * @note: default: 1 294 * @param max_peripheral_connections 295 */ 296 #ifdef ENABLE_LE_PERIPHERAL 297 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 298 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 299 } 300 #endif 301 302 /** 303 * get hci connections iterator 304 * 305 * @return hci connections iterator 306 */ 307 308 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 309 btstack_linked_list_iterator_init(it, &hci_stack->connections); 310 } 311 312 /** 313 * get connection for a given handle 314 * 315 * @return connection OR NULL, if not found 316 */ 317 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 318 btstack_linked_list_iterator_t it; 319 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 320 while (btstack_linked_list_iterator_has_next(&it)){ 321 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 322 if ( item->con_handle == con_handle ) { 323 return item; 324 } 325 } 326 return NULL; 327 } 328 329 /** 330 * get connection for given address 331 * 332 * @return connection OR NULL, if not found 333 */ 334 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 335 btstack_linked_list_iterator_t it; 336 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 337 while (btstack_linked_list_iterator_has_next(&it)){ 338 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 339 if (connection->address_type != addr_type) continue; 340 if (memcmp(addr, connection->address, 6) != 0) continue; 341 return connection; 342 } 343 return NULL; 344 } 345 346 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 347 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 348 } 349 350 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 351 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 352 } 353 354 #ifdef ENABLE_CLASSIC 355 356 #ifdef ENABLE_SCO_OVER_HCI 357 static int hci_number_sco_connections(void){ 358 int connections = 0; 359 btstack_linked_list_iterator_t it; 360 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 361 while (btstack_linked_list_iterator_has_next(&it)){ 362 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 363 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 364 connections++; 365 } 366 return connections; 367 } 368 #endif 369 370 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 371 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 372 #ifdef HAVE_EMBEDDED_TICK 373 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 374 // connections might be timed out 375 hci_emit_l2cap_check_timeout(connection); 376 } 377 #else 378 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 379 // connections might be timed out 380 hci_emit_l2cap_check_timeout(connection); 381 } 382 #endif 383 } 384 385 static void hci_connection_timestamp(hci_connection_t *connection){ 386 #ifdef HAVE_EMBEDDED_TICK 387 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 388 #else 389 connection->timestamp = btstack_run_loop_get_time_ms(); 390 #endif 391 } 392 393 /** 394 * add authentication flags and reset timer 395 * @note: assumes classic connection 396 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 397 */ 398 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 399 bd_addr_t addr; 400 reverse_bd_addr(bd_addr, addr); 401 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 402 if (conn) { 403 connectionSetAuthenticationFlags(conn, flags); 404 hci_connection_timestamp(conn); 405 } 406 } 407 408 static bool hci_pairing_active(hci_connection_t * hci_connection){ 409 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 410 } 411 412 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 413 if (hci_pairing_active(hci_connection)) return; 414 if (ssp){ 415 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 416 } else { 417 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 418 } 419 // if we are initiator, we have sent an HCI Authenticate Request 420 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 421 422 // if we are responder, use minimal service security level as required level 423 if (!initiator){ 424 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); 425 } 426 427 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 428 429 uint8_t event[12]; 430 event[0] = GAP_EVENT_PAIRING_STARTED; 431 event[1] = 10; 432 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 433 reverse_bd_addr(hci_connection->address, &event[4]); 434 event[10] = (uint8_t) ssp; 435 event[11] = (uint8_t) initiator; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 440 hci_connection->requested_security_level = LEVEL_0; 441 if (!hci_pairing_active(hci_connection)) return; 442 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 443 #ifdef ENABLE_CLASSIC_PAIRING_OOB 444 hci_connection->classic_oob_c_192 = NULL; 445 hci_connection->classic_oob_r_192 = NULL; 446 hci_connection->classic_oob_c_256 = NULL; 447 hci_connection->classic_oob_r_256 = NULL; 448 #endif 449 log_info("pairing complete, status %02x", status); 450 451 uint8_t event[11]; 452 event[0] = GAP_EVENT_PAIRING_COMPLETE; 453 event[1] = 9; 454 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 455 reverse_bd_addr(hci_connection->address, &event[4]); 456 event[10] = status; 457 hci_emit_event(event, sizeof(event), 1); 458 } 459 460 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 461 hci_connection_t * conn = hci_connection_for_handle(handle); 462 if (!conn) return false; 463 return hci_pairing_active(conn); 464 } 465 466 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 467 if (!hci_stack->link_key_db) return; 468 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 469 hci_stack->link_key_db->delete_link_key(addr); 470 } 471 472 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 473 if (!hci_stack->link_key_db) return; 474 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 475 hci_stack->link_key_db->put_link_key(addr, link_key, type); 476 } 477 478 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 479 if (!hci_stack->link_key_db) return false; 480 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 481 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 482 return result; 483 } 484 485 void gap_delete_all_link_keys(void){ 486 bd_addr_t addr; 487 link_key_t link_key; 488 link_key_type_t type; 489 btstack_link_key_iterator_t it; 490 int ok = gap_link_key_iterator_init(&it); 491 if (!ok) { 492 log_error("could not initialize iterator"); 493 return; 494 } 495 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 496 gap_drop_link_key_for_bd_addr(addr); 497 } 498 gap_link_key_iterator_done(&it); 499 } 500 501 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 502 if (!hci_stack->link_key_db) return 0; 503 if (!hci_stack->link_key_db->iterator_init) return 0; 504 return hci_stack->link_key_db->iterator_init(it); 505 } 506 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){ 507 if (!hci_stack->link_key_db) return 0; 508 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 509 } 510 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 511 if (!hci_stack->link_key_db) return; 512 hci_stack->link_key_db->iterator_done(it); 513 } 514 #endif 515 516 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 517 switch (address_type){ 518 case BD_ADDR_TYPE_LE_PUBLIC: 519 case BD_ADDR_TYPE_LE_RANDOM: 520 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 521 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 522 return true; 523 default: 524 return false; 525 } 526 } 527 528 static int hci_is_le_connection(hci_connection_t * connection){ 529 return hci_is_le_connection_type(connection->address_type); 530 } 531 532 /** 533 * count connections 534 */ 535 static int nr_hci_connections(void){ 536 int count = 0; 537 btstack_linked_item_t *it; 538 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 539 count++; 540 } 541 return count; 542 } 543 544 uint16_t hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 545 546 unsigned int num_packets_sent_classic = 0; 547 unsigned int num_packets_sent_le = 0; 548 549 btstack_linked_item_t *it; 550 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 551 hci_connection_t * connection = (hci_connection_t *) it; 552 if (hci_is_le_connection(connection)){ 553 num_packets_sent_le += connection->num_packets_sent; 554 } 555 if (connection->address_type == BD_ADDR_TYPE_ACL){ 556 num_packets_sent_classic += connection->num_packets_sent; 557 } 558 } 559 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 560 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 561 int free_slots_le = 0; 562 563 if (free_slots_classic < 0){ 564 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); 565 return 0; 566 } 567 568 if (hci_stack->le_acl_packets_total_num){ 569 // if we have LE slots, they are used 570 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 571 if (free_slots_le < 0){ 572 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); 573 return 0; 574 } 575 } else { 576 // otherwise, classic slots are used for LE, too 577 free_slots_classic -= num_packets_sent_le; 578 if (free_slots_classic < 0){ 579 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); 580 return 0; 581 } 582 } 583 584 switch (address_type){ 585 case BD_ADDR_TYPE_UNKNOWN: 586 log_error("hci_number_free_acl_slots: unknown address type"); 587 return 0; 588 589 case BD_ADDR_TYPE_ACL: 590 return (uint16_t) free_slots_classic; 591 592 default: 593 if (hci_stack->le_acl_packets_total_num > 0){ 594 return (uint16_t) free_slots_le; 595 } 596 return (uint16_t) free_slots_classic; 597 } 598 } 599 600 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 601 // get connection type 602 hci_connection_t * connection = hci_connection_for_handle(con_handle); 603 if (!connection){ 604 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 605 return 0; 606 } 607 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 608 } 609 610 #ifdef ENABLE_CLASSIC 611 static int hci_number_free_sco_slots(void){ 612 unsigned int num_sco_packets_sent = 0; 613 btstack_linked_item_t *it; 614 if (hci_stack->synchronous_flow_control_enabled){ 615 // explicit flow control 616 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 617 hci_connection_t * connection = (hci_connection_t *) it; 618 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 619 num_sco_packets_sent += connection->num_packets_sent; 620 } 621 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 622 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 623 return 0; 624 } 625 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 626 } else { 627 // implicit flow control -- TODO 628 int num_ready = 0; 629 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 630 hci_connection_t * connection = (hci_connection_t *) it; 631 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 632 if (connection->sco_tx_ready == 0) continue; 633 num_ready++; 634 } 635 return num_ready; 636 } 637 } 638 #endif 639 640 // only used to send HCI Host Number Completed Packets 641 static int hci_can_send_comand_packet_transport(void){ 642 if (hci_stack->hci_packet_buffer_reserved) return 0; 643 644 // check for async hci transport implementations 645 if (hci_stack->hci_transport->can_send_packet_now){ 646 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 647 return 0; 648 } 649 } 650 return 1; 651 } 652 653 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 654 bool hci_can_send_command_packet_now(void){ 655 if (hci_can_send_comand_packet_transport() == 0) return false; 656 return hci_stack->num_cmd_packets > 0u; 657 } 658 659 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 660 // check for async hci transport implementations 661 if (!hci_stack->hci_transport->can_send_packet_now) return true; 662 return hci_stack->hci_transport->can_send_packet_now(packet_type); 663 } 664 665 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 666 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 667 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 668 } 669 670 bool hci_can_send_acl_le_packet_now(void){ 671 if (hci_stack->hci_packet_buffer_reserved) return false; 672 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 673 } 674 675 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 676 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 677 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 678 } 679 680 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_acl_packet_now(con_handle); 683 } 684 685 #ifdef ENABLE_CLASSIC 686 bool hci_can_send_acl_classic_packet_now(void){ 687 if (hci_stack->hci_packet_buffer_reserved) return false; 688 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 689 } 690 691 bool hci_can_send_prepared_sco_packet_now(void){ 692 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 693 if (hci_have_usb_transport()){ 694 return hci_stack->sco_can_send_now; 695 } else { 696 return hci_number_free_sco_slots() > 0; 697 } 698 } 699 700 bool hci_can_send_sco_packet_now(void){ 701 if (hci_stack->hci_packet_buffer_reserved) return false; 702 return hci_can_send_prepared_sco_packet_now(); 703 } 704 705 void hci_request_sco_can_send_now_event(void){ 706 hci_stack->sco_waiting_for_can_send_now = 1; 707 hci_notify_if_sco_can_send_now(); 708 } 709 #endif 710 711 // used for internal checks in l2cap.c 712 bool hci_is_packet_buffer_reserved(void){ 713 return hci_stack->hci_packet_buffer_reserved; 714 } 715 716 // reserves outgoing packet buffer. 717 // @return 1 if successful 718 bool hci_reserve_packet_buffer(void){ 719 if (hci_stack->hci_packet_buffer_reserved) { 720 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 721 return false; 722 } 723 hci_stack->hci_packet_buffer_reserved = true; 724 return true; 725 } 726 727 void hci_release_packet_buffer(void){ 728 hci_stack->hci_packet_buffer_reserved = false; 729 } 730 731 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 732 static int hci_transport_synchronous(void){ 733 return hci_stack->hci_transport->can_send_packet_now == NULL; 734 } 735 736 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 737 738 // 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); 739 740 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 741 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 742 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 743 max_acl_data_packet_length = hci_stack->le_data_packets_length; 744 } 745 746 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 747 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 748 max_acl_data_packet_length = connection->le_max_tx_octets; 749 } 750 #endif 751 752 log_debug("hci_send_acl_packet_fragments entered"); 753 754 uint8_t status = ERROR_CODE_SUCCESS; 755 // multiple packets could be send on a synchronous HCI transport 756 while (true){ 757 758 log_debug("hci_send_acl_packet_fragments loop entered"); 759 760 // get current data 761 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 762 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 763 bool more_fragments = false; 764 765 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 766 if (current_acl_data_packet_length > max_acl_data_packet_length){ 767 more_fragments = true; 768 current_acl_data_packet_length = max_acl_data_packet_length; 769 } 770 771 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 772 if (acl_header_pos > 0u){ 773 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 774 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 775 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 776 } 777 778 // update header len 779 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 780 781 // count packet 782 connection->num_packets_sent++; 783 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 784 785 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 786 if (more_fragments){ 787 // update start of next fragment to send 788 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 789 } else { 790 // done 791 hci_stack->acl_fragmentation_pos = 0; 792 hci_stack->acl_fragmentation_total_size = 0; 793 } 794 795 // send packet 796 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 797 const int size = current_acl_data_packet_length + 4; 798 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 799 hci_stack->acl_fragmentation_tx_active = 1; 800 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 801 if (err != 0){ 802 // no error from HCI Transport expected 803 status = ERROR_CODE_HARDWARE_FAILURE; 804 } 805 806 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 807 808 // done yet? 809 if (!more_fragments) break; 810 811 // can send more? 812 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 813 } 814 815 log_debug("hci_send_acl_packet_fragments loop over"); 816 817 // release buffer now for synchronous transport 818 if (hci_transport_synchronous()){ 819 hci_stack->acl_fragmentation_tx_active = 0; 820 hci_release_packet_buffer(); 821 hci_emit_transport_packet_sent(); 822 } 823 824 return status; 825 } 826 827 // pre: caller has reserved the packet buffer 828 uint8_t hci_send_acl_packet_buffer(int size){ 829 btstack_assert(hci_stack->hci_packet_buffer_reserved); 830 831 uint8_t * packet = hci_stack->hci_packet_buffer; 832 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 833 834 // check for free places on Bluetooth module 835 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 836 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 837 hci_release_packet_buffer(); 838 hci_emit_transport_packet_sent(); 839 return BTSTACK_ACL_BUFFERS_FULL; 840 } 841 842 hci_connection_t *connection = hci_connection_for_handle( con_handle); 843 if (!connection) { 844 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 845 hci_release_packet_buffer(); 846 hci_emit_transport_packet_sent(); 847 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 848 } 849 850 #ifdef ENABLE_CLASSIC 851 hci_connection_timestamp(connection); 852 #endif 853 854 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 855 856 // setup data 857 hci_stack->acl_fragmentation_total_size = size; 858 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 859 860 return hci_send_acl_packet_fragments(connection); 861 } 862 863 #ifdef ENABLE_CLASSIC 864 // pre: caller has reserved the packet buffer 865 uint8_t hci_send_sco_packet_buffer(int size){ 866 btstack_assert(hci_stack->hci_packet_buffer_reserved); 867 868 uint8_t * packet = hci_stack->hci_packet_buffer; 869 870 // skip checks in loopback mode 871 if (!hci_stack->loopback_mode){ 872 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 873 874 // check for free places on Bluetooth module 875 if (!hci_can_send_prepared_sco_packet_now()) { 876 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 877 hci_release_packet_buffer(); 878 hci_emit_transport_packet_sent(); 879 return BTSTACK_ACL_BUFFERS_FULL; 880 } 881 882 // track send packet in connection struct 883 hci_connection_t *connection = hci_connection_for_handle( con_handle); 884 if (!connection) { 885 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 889 } 890 891 if (hci_have_usb_transport()){ 892 // token used 893 hci_stack->sco_can_send_now = false; 894 } else { 895 if (hci_stack->synchronous_flow_control_enabled){ 896 connection->num_packets_sent++; 897 } else { 898 connection->sco_tx_ready--; 899 } 900 } 901 } 902 903 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 904 905 #ifdef HAVE_SCO_TRANSPORT 906 hci_stack->sco_transport->send_packet(packet, size); 907 hci_release_packet_buffer(); 908 hci_emit_transport_packet_sent(); 909 910 return 0; 911 #else 912 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 913 if (hci_transport_synchronous()){ 914 hci_release_packet_buffer(); 915 hci_emit_transport_packet_sent(); 916 } 917 918 if (err != 0){ 919 return ERROR_CODE_HARDWARE_FAILURE; 920 } 921 return ERROR_CODE_SUCCESS; 922 #endif 923 } 924 #endif 925 926 static void acl_handler(uint8_t *packet, uint16_t size){ 927 928 // get info 929 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 930 hci_connection_t *conn = hci_connection_for_handle(con_handle); 931 uint8_t acl_flags = READ_ACL_FLAGS(packet); 932 uint16_t acl_length = READ_ACL_LENGTH(packet); 933 934 // ignore non-registered handle 935 if (!conn){ 936 log_error("acl_handler called with non-registered handle %u!" , con_handle); 937 return; 938 } 939 940 // assert packet is complete 941 if ((acl_length + 4u) != size){ 942 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 943 return; 944 } 945 946 #ifdef ENABLE_CLASSIC 947 // update idle timestamp 948 hci_connection_timestamp(conn); 949 #endif 950 951 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 952 hci_stack->host_completed_packets = 1; 953 conn->num_packets_completed++; 954 #endif 955 956 // handle different packet types 957 switch (acl_flags & 0x03u) { 958 959 case 0x01: // continuation fragment 960 961 // sanity checks 962 if (conn->acl_recombination_pos == 0u) { 963 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 964 return; 965 } 966 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 967 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 968 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 969 conn->acl_recombination_pos = 0; 970 return; 971 } 972 973 // append fragment payload (header already stored) 974 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 975 &packet[4], acl_length); 976 conn->acl_recombination_pos += acl_length; 977 978 // forward complete L2CAP packet if complete. 979 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 980 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 981 // reset recombination buffer 982 conn->acl_recombination_length = 0; 983 conn->acl_recombination_pos = 0; 984 } 985 break; 986 987 case 0x02: { // first fragment 988 989 // sanity check 990 if (conn->acl_recombination_pos) { 991 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 992 conn->acl_recombination_pos = 0; 993 } 994 995 // peek into L2CAP packet! 996 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 997 998 // compare fragment size to L2CAP packet size 999 if (acl_length >= (l2cap_length + 4u)){ 1000 // forward fragment as L2CAP packet 1001 hci_emit_acl_packet(packet, acl_length + 4u); 1002 } else { 1003 1004 if (acl_length > HCI_ACL_BUFFER_SIZE){ 1005 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 1006 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 1007 return; 1008 } 1009 1010 // store first fragment and tweak acl length for complete package 1011 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 1012 packet, acl_length + 4u); 1013 conn->acl_recombination_pos = acl_length + 4u; 1014 conn->acl_recombination_length = l2cap_length; 1015 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1016 } 1017 break; 1018 1019 } 1020 default: 1021 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1022 return; 1023 } 1024 1025 // execute main loop 1026 hci_run(); 1027 } 1028 1029 static void hci_connection_stop_timer(hci_connection_t * conn){ 1030 btstack_run_loop_remove_timer(&conn->timeout); 1031 #ifdef ENABLE_CLASSIC 1032 btstack_run_loop_remove_timer(&conn->timeout_sco); 1033 #endif 1034 } 1035 1036 static void hci_shutdown_connection(hci_connection_t *conn){ 1037 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1038 1039 #ifdef ENABLE_CLASSIC 1040 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1041 bd_addr_type_t addr_type = conn->address_type; 1042 #endif 1043 #ifdef HAVE_SCO_TRANSPORT 1044 hci_con_handle_t con_handle = conn->con_handle; 1045 #endif 1046 #endif 1047 1048 hci_connection_stop_timer(conn); 1049 1050 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1051 btstack_memory_hci_connection_free( conn ); 1052 1053 // now it's gone 1054 hci_emit_nr_connections_changed(); 1055 1056 #ifdef ENABLE_CLASSIC 1057 #ifdef ENABLE_SCO_OVER_HCI 1058 // update SCO 1059 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1060 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1061 } 1062 #endif 1063 #ifdef HAVE_SCO_TRANSPORT 1064 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1065 hci_stack->sco_transport->close(con_handle); 1066 } 1067 #endif 1068 #endif 1069 } 1070 1071 #ifdef ENABLE_CLASSIC 1072 1073 static const uint16_t packet_type_sizes[] = { 1074 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1075 HCI_ACL_DH1_SIZE, 0, 0, 0, 1076 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1077 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1078 }; 1079 static const uint8_t packet_type_feature_requirement_bit[] = { 1080 0, // 3 slot packets 1081 1, // 5 slot packets 1082 25, // EDR 2 mpbs 1083 26, // EDR 3 mbps 1084 39, // 3 slot EDR packts 1085 40, // 5 slot EDR packet 1086 }; 1087 static const uint16_t packet_type_feature_packet_mask[] = { 1088 0x0f00, // 3 slot packets 1089 0xf000, // 5 slot packets 1090 0x1102, // EDR 2 mpbs 1091 0x2204, // EDR 3 mbps 1092 0x0300, // 3 slot EDR packts 1093 0x3000, // 5 slot EDR packet 1094 }; 1095 1096 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1097 // enable packet types based on size 1098 uint16_t packet_types = 0; 1099 unsigned int i; 1100 for (i=0;i<16;i++){ 1101 if (packet_type_sizes[i] == 0) continue; 1102 if (packet_type_sizes[i] <= buffer_size){ 1103 packet_types |= 1 << i; 1104 } 1105 } 1106 // disable packet types due to missing local supported features 1107 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1108 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1109 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1110 if (feature_set) continue; 1111 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1112 packet_types &= ~packet_type_feature_packet_mask[i]; 1113 } 1114 // flip bits for "may not be used" 1115 packet_types ^= 0x3306; 1116 return packet_types; 1117 } 1118 1119 uint16_t hci_usable_acl_packet_types(void){ 1120 return hci_stack->packet_types; 1121 } 1122 #endif 1123 1124 uint8_t* hci_get_outgoing_packet_buffer(void){ 1125 // hci packet buffer is >= acl data packet length 1126 return hci_stack->hci_packet_buffer; 1127 } 1128 1129 uint16_t hci_max_acl_data_packet_length(void){ 1130 return hci_stack->acl_data_packet_length; 1131 } 1132 1133 #ifdef ENABLE_CLASSIC 1134 bool hci_extended_sco_link_supported(void){ 1135 // No. 31, byte 3, bit 7 1136 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1137 } 1138 #endif 1139 1140 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1141 // No. 54, byte 6, bit 6 1142 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1143 } 1144 1145 #ifdef ENABLE_CLASSIC 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 #endif 1151 1152 static int hci_classic_supported(void){ 1153 #ifdef ENABLE_CLASSIC 1154 // No. 37, byte 4, bit 5, = No BR/EDR Support 1155 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1156 #else 1157 return 0; 1158 #endif 1159 } 1160 1161 static int hci_le_supported(void){ 1162 #ifdef ENABLE_BLE 1163 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1164 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1165 #else 1166 return 0; 1167 #endif 1168 } 1169 1170 #ifdef ENABLE_BLE 1171 1172 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1173 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1174 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1175 } else { 1176 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1177 } 1178 } 1179 1180 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1181 *addr_type = hci_stack->le_own_addr_type; 1182 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1183 } 1184 1185 #ifdef ENABLE_LE_PERIPHERAL 1186 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1187 *addr_type = hci_stack->le_advertisements_own_addr_type; 1188 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1189 }; 1190 #endif 1191 1192 #ifdef ENABLE_LE_CENTRAL 1193 1194 /** 1195 * @brief Get own addr type and address used for LE connections (Central) 1196 */ 1197 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1198 *addr_type = hci_stack->le_connection_own_addr_type; 1199 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1200 } 1201 1202 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1203 1204 int offset = 3; 1205 int num_reports = packet[offset]; 1206 offset += 1; 1207 1208 int i; 1209 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1210 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1211 for (i=0; (i<num_reports) && (offset < size);i++){ 1212 // sanity checks on data_length: 1213 uint8_t data_length = packet[offset + 8]; 1214 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1215 if ((offset + 9u + data_length + 1u) > size) return; 1216 // setup event 1217 uint8_t event_size = 10u + data_length; 1218 int pos = 0; 1219 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1220 event[pos++] = event_size; 1221 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1222 offset += 8; 1223 pos += 8; 1224 event[pos++] = packet[offset + 1 + data_length]; // rssi 1225 event[pos++] = data_length; 1226 offset++; 1227 (void)memcpy(&event[pos], &packet[offset], data_length); 1228 pos += data_length; 1229 offset += data_length + 1u; // rssi 1230 hci_emit_event(event, pos, 1); 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #ifdef ENABLE_BLE 1237 #ifdef ENABLE_LE_PERIPHERAL 1238 static void hci_update_advertisements_enabled_for_current_roles(void){ 1239 if (hci_stack->le_advertisements_enabled){ 1240 // get number of active le slave connections 1241 int num_slave_connections = 0; 1242 btstack_linked_list_iterator_t it; 1243 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1244 while (btstack_linked_list_iterator_has_next(&it)){ 1245 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1246 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1247 if (con->state != OPEN) continue; 1248 if (con->role != HCI_ROLE_SLAVE) continue; 1249 if (!hci_is_le_connection(con)) continue; 1250 num_slave_connections++; 1251 } 1252 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1253 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1254 } else { 1255 hci_stack->le_advertisements_enabled_for_current_roles = false; 1256 } 1257 } 1258 #endif 1259 #endif 1260 1261 #ifdef ENABLE_CLASSIC 1262 static void gap_run_set_local_name(void){ 1263 hci_reserve_packet_buffer(); 1264 uint8_t * packet = hci_stack->hci_packet_buffer; 1265 // construct HCI Command and send 1266 uint16_t opcode = hci_write_local_name.opcode; 1267 hci_stack->last_cmd_opcode = opcode; 1268 packet[0] = opcode & 0xff; 1269 packet[1] = opcode >> 8; 1270 packet[2] = DEVICE_NAME_LEN; 1271 memset(&packet[3], 0, DEVICE_NAME_LEN); 1272 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1273 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1274 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1275 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1276 // expand '00:00:00:00:00:00' in name with bd_addr 1277 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1278 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1279 } 1280 1281 static void gap_run_set_eir_data(void){ 1282 hci_reserve_packet_buffer(); 1283 uint8_t * packet = hci_stack->hci_packet_buffer; 1284 // construct HCI Command in-place and send 1285 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1286 hci_stack->last_cmd_opcode = opcode; 1287 uint16_t offset = 0; 1288 packet[offset++] = opcode & 0xff; 1289 packet[offset++] = opcode >> 8; 1290 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1291 packet[offset++] = 0; // FEC not required 1292 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1293 if (hci_stack->eir_data){ 1294 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1295 ad_context_t context; 1296 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1297 uint8_t data_type = ad_iterator_get_data_type(&context); 1298 uint8_t size = ad_iterator_get_data_len(&context); 1299 const uint8_t *data = ad_iterator_get_data(&context); 1300 // copy item 1301 packet[offset++] = size + 1; 1302 packet[offset++] = data_type; 1303 memcpy(&packet[offset], data, size); 1304 // update name item 1305 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1306 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1307 } 1308 offset += size; 1309 } 1310 } else { 1311 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1312 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1313 packet[offset++] = bytes_to_copy + 1; 1314 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1315 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1316 // expand '00:00:00:00:00:00' in name with bd_addr 1317 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1318 } 1319 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1320 } 1321 1322 static void hci_run_gap_tasks_classic(void){ 1323 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 1324 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 1325 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1326 return; 1327 } 1328 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 1329 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 1330 gap_run_set_local_name(); 1331 return; 1332 } 1333 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 1334 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 1335 gap_run_set_eir_data(); 1336 return; 1337 } 1338 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 1339 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 1340 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1341 return; 1342 } 1343 // write page scan activity 1344 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY) != 0) { 1345 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 1346 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 1347 return; 1348 } 1349 // write page scan type 1350 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_SCAN_TYPE) != 0) { 1351 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_SCAN_TYPE; 1352 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 1353 return; 1354 } 1355 // write page timeout 1356 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_PAGE_TIMEOUT) != 0) { 1357 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_PAGE_TIMEOUT; 1358 hci_send_cmd(&hci_write_page_timeout, hci_stack->page_timeout); 1359 return; 1360 } 1361 // send scan enable 1362 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_SCAN_ENABLE) != 0) { 1363 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_SCAN_ENABLE; 1364 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 1365 return; 1366 } 1367 // send write scan activity 1368 if ((hci_stack->gap_tasks & GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY) != 0) { 1369 hci_stack->gap_tasks &= ~GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 1370 hci_send_cmd(&hci_write_inquiry_scan_activity, hci_stack->inquiry_scan_interval, hci_stack->inquiry_scan_window); 1371 return; 1372 } 1373 } 1374 #endif 1375 1376 #ifndef HAVE_HOST_CONTROLLER_API 1377 1378 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1379 if (!hci_stack->config) return 0; 1380 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1381 // Limit baud rate for Broadcom chipsets to 3 mbps 1382 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1383 baud_rate = 3000000; 1384 } 1385 return baud_rate; 1386 } 1387 1388 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1389 UNUSED(ds); 1390 1391 switch (hci_stack->substate){ 1392 case HCI_INIT_W4_SEND_RESET: 1393 log_info("Resend HCI Reset"); 1394 hci_stack->substate = HCI_INIT_SEND_RESET; 1395 hci_stack->num_cmd_packets = 1; 1396 hci_run(); 1397 break; 1398 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1399 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1400 if (hci_stack->hci_transport->reset_link){ 1401 hci_stack->hci_transport->reset_link(); 1402 } 1403 1404 /* fall through */ 1405 1406 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1407 log_info("Resend HCI Reset - CSR Warm Boot"); 1408 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1409 hci_stack->num_cmd_packets = 1; 1410 hci_run(); 1411 break; 1412 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1413 if (hci_stack->hci_transport->set_baudrate){ 1414 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1415 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1416 hci_stack->hci_transport->set_baudrate(baud_rate); 1417 } 1418 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1419 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1420 if (hci_stack->hci_transport->reset_link){ 1421 log_info("Link Reset"); 1422 hci_stack->hci_transport->reset_link(); 1423 } 1424 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1425 hci_run(); 1426 } 1427 break; 1428 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1429 // otherwise continue 1430 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1431 hci_send_cmd(&hci_read_local_supported_commands); 1432 break; 1433 default: 1434 break; 1435 } 1436 } 1437 #endif 1438 1439 static void hci_initializing_next_state(void){ 1440 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1441 } 1442 1443 static void hci_init_done(void){ 1444 // done. tell the app 1445 log_info("hci_init_done -> HCI_STATE_WORKING"); 1446 hci_stack->state = HCI_STATE_WORKING; 1447 hci_emit_state(); 1448 } 1449 1450 // assumption: hci_can_send_command_packet_now() == true 1451 static void hci_initializing_run(void){ 1452 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1453 1454 if (!hci_can_send_command_packet_now()) return; 1455 1456 #ifndef HAVE_HOST_CONTROLLER_API 1457 bool need_baud_change = hci_stack->config 1458 && hci_stack->chipset 1459 && hci_stack->chipset->set_baudrate_command 1460 && hci_stack->hci_transport->set_baudrate 1461 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1462 #endif 1463 1464 switch (hci_stack->substate){ 1465 case HCI_INIT_SEND_RESET: 1466 hci_state_reset(); 1467 1468 #ifndef HAVE_HOST_CONTROLLER_API 1469 // prepare reset if command complete not received in 100ms 1470 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1471 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1472 btstack_run_loop_add_timer(&hci_stack->timeout); 1473 #endif 1474 // send command 1475 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1476 hci_send_cmd(&hci_reset); 1477 break; 1478 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1479 hci_send_cmd(&hci_read_local_version_information); 1480 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1481 break; 1482 1483 #ifndef HAVE_HOST_CONTROLLER_API 1484 case HCI_INIT_SEND_READ_LOCAL_NAME: 1485 hci_send_cmd(&hci_read_local_name); 1486 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1487 break; 1488 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1489 hci_state_reset(); 1490 // prepare reset if command complete not received in 100ms 1491 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1492 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1493 btstack_run_loop_add_timer(&hci_stack->timeout); 1494 // send command 1495 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1496 hci_send_cmd(&hci_reset); 1497 break; 1498 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1499 hci_state_reset(); 1500 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1501 hci_send_cmd(&hci_reset); 1502 break; 1503 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1504 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1505 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1506 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1507 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1508 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1509 break; 1510 } 1511 case HCI_INIT_SET_BD_ADDR: 1512 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1513 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1514 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1515 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1516 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1517 break; 1518 case HCI_INIT_SEND_BAUD_CHANGE: 1519 if (need_baud_change) { 1520 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1521 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1522 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1523 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1524 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1525 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1526 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1527 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1528 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1529 btstack_run_loop_add_timer(&hci_stack->timeout); 1530 } 1531 break; 1532 } 1533 1534 /* fall through */ 1535 1536 case HCI_INIT_CUSTOM_INIT: 1537 // Custom initialization 1538 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1539 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1540 bool send_cmd = false; 1541 switch (hci_stack->chipset_result){ 1542 case BTSTACK_CHIPSET_VALID_COMMAND: 1543 send_cmd = true; 1544 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1545 break; 1546 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1547 send_cmd = true; 1548 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1549 log_info("CSR Warm Boot"); 1550 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1551 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1552 btstack_run_loop_add_timer(&hci_stack->timeout); 1553 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1554 && hci_stack->config 1555 && hci_stack->chipset 1556 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1557 && hci_stack->hci_transport->set_baudrate 1558 && hci_transport_uart_get_main_baud_rate()){ 1559 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1560 } else { 1561 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1562 } 1563 break; 1564 default: 1565 break; 1566 } 1567 1568 if (send_cmd){ 1569 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1570 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1571 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1572 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1573 break; 1574 } 1575 log_info("Init script done"); 1576 1577 // Init script download on Broadcom chipsets causes: 1578 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1579 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1580 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1581 1582 // - baud rate to reset, restore UART baud rate if needed 1583 if (need_baud_change) { 1584 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1585 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1586 hci_stack->hci_transport->set_baudrate(baud_rate); 1587 } 1588 1589 uint16_t bcm_delay_ms = 300; 1590 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1591 // -> Work around: wait here. 1592 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1593 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1594 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1595 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1596 btstack_run_loop_add_timer(&hci_stack->timeout); 1597 break; 1598 } 1599 } 1600 #endif 1601 /* fall through */ 1602 1603 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1604 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1605 hci_send_cmd(&hci_read_local_supported_commands); 1606 break; 1607 case HCI_INIT_READ_BD_ADDR: 1608 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1609 hci_send_cmd(&hci_read_bd_addr); 1610 break; 1611 case HCI_INIT_READ_BUFFER_SIZE: 1612 // only read buffer size if supported 1613 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1614 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1615 hci_send_cmd(&hci_read_buffer_size); 1616 break; 1617 } 1618 1619 /* fall through */ 1620 1621 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1622 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1623 hci_send_cmd(&hci_read_local_supported_features); 1624 break; 1625 1626 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1627 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1628 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1629 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1630 break; 1631 case HCI_INIT_HOST_BUFFER_SIZE: 1632 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1633 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1634 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1635 break; 1636 #endif 1637 1638 case HCI_INIT_SET_EVENT_MASK: 1639 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1640 if (hci_le_supported()){ 1641 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1642 } else { 1643 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1644 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1645 } 1646 break; 1647 1648 #ifdef ENABLE_CLASSIC 1649 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1650 if (hci_classic_supported() && gap_ssp_supported()){ 1651 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1652 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1653 break; 1654 } 1655 1656 /* fall through */ 1657 1658 case HCI_INIT_WRITE_INQUIRY_MODE: 1659 if (hci_classic_supported()){ 1660 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1661 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1662 break; 1663 } 1664 1665 /* fall through */ 1666 1667 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1668 // skip write secure connections host support if not supported or disabled 1669 if (hci_classic_supported() && hci_stack->secure_connections_enable && (hci_stack->local_supported_commands[1u] & 0x02u) != 0u) { 1670 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1671 hci_stack->secure_connections_active = true; 1672 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1673 break; 1674 } 1675 1676 #ifdef ENABLE_SCO_OVER_HCI 1677 /* fall through */ 1678 1679 // only sent if ENABLE_SCO_OVER_HCI is defined 1680 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1681 // skip write synchronous flow control if not supported 1682 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x04) != 0)){ 1683 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1684 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1685 break; 1686 } 1687 /* fall through */ 1688 1689 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1690 // skip write default erroneous data reporting if not supported 1691 if (hci_classic_supported() && ((hci_stack->local_supported_commands[0] & 0x08) != 0)){ 1692 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1693 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1694 break; 1695 } 1696 #endif 1697 1698 #if defined(ENABLE_SCO_OVER_HCI) || defined(ENABLE_SCO_OVER_PCM) 1699 /* fall through */ 1700 1701 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1702 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1703 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1704 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1705 #ifdef ENABLE_SCO_OVER_HCI 1706 log_info("BCM: Route SCO data via HCI transport"); 1707 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1708 #endif 1709 #ifdef ENABLE_SCO_OVER_PCM 1710 log_info("BCM: Route SCO data via PCM interface"); 1711 #ifdef ENABLE_BCM_PCM_WBS 1712 // 512 kHz bit clock for 2 channels x 16 bit x 16 kHz 1713 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1714 #else 1715 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1716 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1717 #endif 1718 #endif 1719 break; 1720 } 1721 #endif 1722 1723 #ifdef ENABLE_SCO_OVER_PCM 1724 /* fall through */ 1725 1726 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1727 if (hci_classic_supported() && (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION)){ 1728 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1729 log_info("BCM: Config PCM interface for I2S"); 1730 #ifdef ENABLE_BCM_PCM_WBS 1731 // 512 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, 2); 1733 #else 1734 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1735 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1736 #endif 1737 break; 1738 } 1739 #endif 1740 #endif 1741 1742 #ifdef ENABLE_BLE 1743 /* fall through */ 1744 1745 // LE INIT 1746 case HCI_INIT_LE_READ_BUFFER_SIZE: 1747 if (hci_le_supported()){ 1748 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1749 hci_send_cmd(&hci_le_read_buffer_size); 1750 break; 1751 } 1752 1753 /* fall through */ 1754 1755 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1756 // skip write le host if not supported (e.g. on LE only EM9301) 1757 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x02u) != 0)){ 1758 // LE Supported Host = 1, Simultaneous Host = 0 1759 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1760 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1761 break; 1762 } 1763 1764 /* fall through */ 1765 1766 case HCI_INIT_LE_SET_EVENT_MASK: 1767 if (hci_le_supported()){ 1768 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1769 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1770 break; 1771 } 1772 #endif 1773 1774 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1775 /* fall through */ 1776 1777 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1778 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1779 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1780 hci_send_cmd(&hci_le_read_maximum_data_length); 1781 break; 1782 } 1783 1784 /* fall through */ 1785 1786 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1787 if (hci_le_supported() && ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u)){ 1788 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1789 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1790 break; 1791 } 1792 #endif 1793 1794 #ifdef ENABLE_LE_CENTRAL 1795 /* fall through */ 1796 1797 case HCI_INIT_READ_WHITE_LIST_SIZE: 1798 if (hci_le_supported()){ 1799 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1800 hci_send_cmd(&hci_le_read_white_list_size); 1801 break; 1802 } 1803 1804 /* fall through */ 1805 1806 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1807 if (hci_le_supported()){ 1808 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1809 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); 1810 break; 1811 } 1812 #endif 1813 1814 /* fall through */ 1815 1816 case HCI_INIT_DONE: 1817 hci_stack->substate = HCI_INIT_DONE; 1818 #ifdef ENABLE_CLASSIC 1819 // init sequence complete, check if GAP Tasks are completed 1820 if (hci_stack->gap_tasks != 0) { 1821 hci_run_gap_tasks_classic(); 1822 break; 1823 } 1824 #endif 1825 hci_init_done(); 1826 break; 1827 1828 default: 1829 return; 1830 } 1831 } 1832 1833 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1834 bool command_completed = false; 1835 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1836 uint16_t opcode = little_endian_read_16(packet,3); 1837 if (opcode == hci_stack->last_cmd_opcode){ 1838 command_completed = true; 1839 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1840 } else { 1841 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1842 } 1843 } 1844 1845 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1846 uint8_t status = packet[2]; 1847 uint16_t opcode = little_endian_read_16(packet,4); 1848 if (opcode == hci_stack->last_cmd_opcode){ 1849 if (status){ 1850 command_completed = true; 1851 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1852 } else { 1853 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1854 } 1855 } else { 1856 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1857 } 1858 } 1859 #ifndef HAVE_HOST_CONTROLLER_API 1860 // Vendor == CSR 1861 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1862 // TODO: track actual command 1863 command_completed = true; 1864 } 1865 1866 // Vendor == Toshiba 1867 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1868 // TODO: track actual command 1869 command_completed = true; 1870 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1871 hci_stack->num_cmd_packets = 1; 1872 } 1873 #endif 1874 1875 return command_completed; 1876 } 1877 1878 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1879 1880 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1881 1882 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1883 1884 #ifndef HAVE_HOST_CONTROLLER_API 1885 1886 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1887 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1888 // 1889 // HCI Reset 1890 // Timeout 100 ms 1891 // HCI Reset 1892 // Command Complete Reset 1893 // HCI Read Local Version Information 1894 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1895 // hang... 1896 // 1897 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1898 if (!command_completed 1899 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1900 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1901 1902 uint16_t opcode = little_endian_read_16(packet,3); 1903 if (opcode == hci_reset.opcode){ 1904 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1905 return; 1906 } 1907 } 1908 1909 // CSR & H5 1910 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1911 if (!command_completed 1912 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1913 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1914 1915 uint16_t opcode = little_endian_read_16(packet,3); 1916 if (opcode == hci_reset.opcode){ 1917 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1918 return; 1919 } 1920 } 1921 1922 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1923 // fix: Correct substate and behave as command below 1924 if (command_completed){ 1925 switch (hci_stack->substate){ 1926 case HCI_INIT_SEND_RESET: 1927 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1928 break; 1929 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1930 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1931 break; 1932 default: 1933 break; 1934 } 1935 } 1936 1937 #endif 1938 1939 if (!command_completed) return; 1940 1941 bool need_baud_change = false; 1942 bool need_addr_change = false; 1943 1944 #ifndef HAVE_HOST_CONTROLLER_API 1945 need_baud_change = hci_stack->config 1946 && hci_stack->chipset 1947 && hci_stack->chipset->set_baudrate_command 1948 && hci_stack->hci_transport->set_baudrate 1949 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1950 1951 need_addr_change = hci_stack->custom_bd_addr_set 1952 && hci_stack->chipset 1953 && hci_stack->chipset->set_bd_addr_command; 1954 #endif 1955 1956 switch(hci_stack->substate){ 1957 1958 #ifndef HAVE_HOST_CONTROLLER_API 1959 case HCI_INIT_SEND_RESET: 1960 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1961 // fix: just correct substate and behave as command below 1962 1963 /* fall through */ 1964 #endif 1965 1966 case HCI_INIT_W4_SEND_RESET: 1967 btstack_run_loop_remove_timer(&hci_stack->timeout); 1968 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1969 return; 1970 1971 #ifndef HAVE_HOST_CONTROLLER_API 1972 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1973 // for STLC2500D, baud rate change already happened. 1974 // for others, baud rate gets changed now 1975 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1976 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1977 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1978 hci_stack->hci_transport->set_baudrate(baud_rate); 1979 } 1980 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1981 return; 1982 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1983 btstack_run_loop_remove_timer(&hci_stack->timeout); 1984 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1985 return; 1986 case HCI_INIT_W4_CUSTOM_INIT: 1987 // repeat custom init 1988 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1989 return; 1990 #endif 1991 1992 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1993 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1994 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1995 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1996 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1997 return; 1998 } 1999 if (need_addr_change){ 2000 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2001 return; 2002 } 2003 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2004 return; 2005 #ifndef HAVE_HOST_CONTROLLER_API 2006 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 2007 if (need_baud_change){ 2008 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 2009 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 2010 hci_stack->hci_transport->set_baudrate(baud_rate); 2011 } 2012 if (need_addr_change){ 2013 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 2014 return; 2015 } 2016 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2017 return; 2018 case HCI_INIT_W4_SET_BD_ADDR: 2019 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 2020 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 2021 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 2022 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 2023 return; 2024 } 2025 // skipping st warm boot 2026 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2027 return; 2028 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 2029 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 2030 return; 2031 #endif 2032 2033 case HCI_INIT_DONE: 2034 // set state if we came here by fall through 2035 hci_stack->substate = HCI_INIT_DONE; 2036 return; 2037 2038 default: 2039 break; 2040 } 2041 hci_initializing_next_state(); 2042 } 2043 2044 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2045 // CC2564C might emit Connection Complete for rejected incoming SCO connection 2046 // To prevent accidentally free'ing the CHI connection for the ACL connection, 2047 // check if the hci connection has been outgoing 2048 switch (conn->state){ 2049 case SEND_CREATE_CONNECTION: 2050 case RECEIVED_CONNECTION_REQUEST: 2051 break; 2052 default: 2053 return; 2054 } 2055 2056 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2057 bd_addr_t bd_address; 2058 (void)memcpy(&bd_address, conn->address, 6); 2059 2060 #ifdef ENABLE_CLASSIC 2061 // cache needed data 2062 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2063 #endif 2064 2065 // connection failed, remove entry 2066 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2067 btstack_memory_hci_connection_free( conn ); 2068 2069 #ifdef ENABLE_CLASSIC 2070 // notify client if dedicated bonding 2071 if (notify_dedicated_bonding_failed){ 2072 log_info("hci notify_dedicated_bonding_failed"); 2073 hci_emit_dedicated_bonding_result(bd_address, status); 2074 } 2075 2076 // if authentication error, also delete link key 2077 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2078 gap_drop_link_key_for_bd_addr(bd_address); 2079 } 2080 #else 2081 UNUSED(status); 2082 #endif 2083 } 2084 2085 #ifdef ENABLE_CLASSIC 2086 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2087 // SSP Controller 2088 if (features[6] & (1 << 3)){ 2089 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2090 } 2091 // eSCO 2092 if (features[3] & (1<<7)){ 2093 conn->remote_supported_features[0] |= 1; 2094 } 2095 // Extended features 2096 if (features[7] & (1<<7)){ 2097 conn->remote_supported_features[0] |= 2; 2098 } 2099 } 2100 2101 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2102 // SSP Host 2103 if (features[0] & (1 << 0)){ 2104 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2105 } 2106 // SC Host 2107 if (features[0] & (1 << 3)){ 2108 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2109 } 2110 } 2111 2112 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2113 // SC Controller 2114 if (features[1] & (1 << 0)){ 2115 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2116 } 2117 } 2118 2119 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2120 conn->bonding_flags &= ~BONDING_REMOTE_FEATURES_QUERY_ACTIVE; 2121 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2122 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2123 if (conn->bonding_flags & BONDING_DEDICATED){ 2124 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2125 } 2126 } 2127 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2128 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2129 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2130 } 2131 2132 #endif 2133 2134 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2135 // handle BT initialization 2136 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2137 hci_initializing_event_handler(packet, size); 2138 } 2139 2140 // help with BT sleep 2141 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2142 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2143 && (HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable))) { 2144 hci_initializing_next_state(); 2145 } 2146 } 2147 2148 #ifdef ENABLE_CLASSIC 2149 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2150 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2151 conn->encryption_key_size = encryption_key_size; 2152 2153 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2154 conn->requested_security_level = LEVEL_0; 2155 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2156 return; 2157 } 2158 2159 // Request remote features if not already done 2160 hci_trigger_remote_features_for_connection(conn); 2161 2162 // Request Authentication if not already done 2163 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2164 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2165 } 2166 #endif 2167 2168 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2169 UNUSED(size); 2170 2171 uint16_t manufacturer; 2172 #ifdef ENABLE_CLASSIC 2173 hci_con_handle_t handle; 2174 hci_connection_t * conn; 2175 uint8_t status; 2176 #endif 2177 // get num cmd packets - limit to 1 to reduce complexity 2178 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2179 2180 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2181 switch (opcode){ 2182 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2183 if (packet[5]) break; 2184 // terminate, name 248 chars 2185 packet[6+248] = 0; 2186 log_info("local name: %s", &packet[6]); 2187 break; 2188 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2189 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2190 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2191 uint16_t acl_len = little_endian_read_16(packet, 6); 2192 uint16_t sco_len = packet[8]; 2193 2194 // determine usable ACL/SCO payload size 2195 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2196 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2197 2198 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2199 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2200 2201 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2202 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2203 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2204 } 2205 break; 2206 case HCI_OPCODE_HCI_READ_RSSI: 2207 if (packet[5] == ERROR_CODE_SUCCESS){ 2208 uint8_t event[5]; 2209 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2210 event[1] = 3; 2211 (void)memcpy(&event[2], &packet[6], 3); 2212 hci_emit_event(event, sizeof(event), 1); 2213 } 2214 break; 2215 #ifdef ENABLE_BLE 2216 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2217 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2218 hci_stack->le_acl_packets_total_num = packet[8]; 2219 // determine usable ACL payload size 2220 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2221 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2222 } 2223 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2224 break; 2225 #endif 2226 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2227 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2228 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2229 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2230 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); 2231 break; 2232 #endif 2233 #ifdef ENABLE_LE_CENTRAL 2234 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2235 hci_stack->le_whitelist_capacity = packet[6]; 2236 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2237 break; 2238 #endif 2239 case HCI_OPCODE_HCI_READ_BD_ADDR: 2240 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2241 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)); 2242 #ifdef ENABLE_CLASSIC 2243 if (hci_stack->link_key_db){ 2244 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2245 } 2246 #endif 2247 break; 2248 #ifdef ENABLE_CLASSIC 2249 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2250 hci_emit_discoverable_enabled(hci_stack->discoverable); 2251 break; 2252 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2253 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2254 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2255 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2256 hci_emit_event(event, sizeof(event), 1); 2257 } 2258 break; 2259 #endif 2260 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2261 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2262 2263 #ifdef ENABLE_CLASSIC 2264 // determine usable ACL packet types based on host buffer size and supported features 2265 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2266 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2267 #endif 2268 // Classic/LE 2269 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2270 break; 2271 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2272 manufacturer = little_endian_read_16(packet, 10); 2273 // map Cypress to Broadcom 2274 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2275 log_info("Treat Cypress as Broadcom"); 2276 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2277 little_endian_store_16(packet, 10, manufacturer); 2278 } 2279 hci_stack->manufacturer = manufacturer; 2280 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2281 break; 2282 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2283 hci_stack->local_supported_commands[0] = 2284 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2285 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2286 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2287 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2288 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2289 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2290 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2291 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2292 hci_stack->local_supported_commands[1] = 2293 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2294 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2295 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2296 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2297 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2298 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2299 break; 2300 #ifdef ENABLE_CLASSIC 2301 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2302 if (packet[5]) return; 2303 hci_stack->synchronous_flow_control_enabled = 1; 2304 break; 2305 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2306 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2307 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2308 conn = hci_connection_for_handle(handle); 2309 if (conn != NULL) { 2310 uint8_t key_size = 0; 2311 if (status == 0){ 2312 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2313 log_info("Handle %04x key Size: %u", handle, key_size); 2314 } else { 2315 key_size = 1; 2316 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2317 } 2318 hci_handle_read_encryption_key_size_complete(conn, key_size); 2319 } 2320 break; 2321 // assert pairing complete event is emitted. 2322 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2323 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2324 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2325 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2326 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 2327 // lookup connection by gap pairing addr 2328 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2329 if (conn == NULL) break; 2330 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2331 break; 2332 2333 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2334 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2335 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2336 uint8_t event[67]; 2337 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2338 event[1] = 65; 2339 (void)memset(&event[2], 0, 65); 2340 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2341 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2342 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2343 event[2] = 3; 2344 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2345 } else { 2346 event[2] = 1; 2347 } 2348 } 2349 hci_emit_event(event, sizeof(event), 0); 2350 break; 2351 } 2352 2353 // note: only needed if user does not provide OOB data 2354 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2355 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2356 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2357 if (conn == NULL) break; 2358 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2359 break; 2360 #endif 2361 #endif 2362 default: 2363 break; 2364 } 2365 } 2366 2367 #ifdef ENABLE_BLE 2368 static void event_handle_le_connection_complete(const uint8_t * packet){ 2369 bd_addr_t addr; 2370 bd_addr_type_t addr_type; 2371 hci_connection_t * conn; 2372 2373 // Connection management 2374 reverse_bd_addr(&packet[8], addr); 2375 addr_type = (bd_addr_type_t)packet[7]; 2376 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2377 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2378 2379 #ifdef ENABLE_LE_CENTRAL 2380 // handle error: error is reported only to the initiator -> outgoing connection 2381 if (packet[3]){ 2382 2383 // handle cancelled outgoing connection 2384 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2385 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2386 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2387 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2388 // reset state 2389 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2390 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2391 // get outgoing connection conn struct for direct connect 2392 conn = gap_get_outgoing_connection(); 2393 } 2394 2395 // outgoing le connection establishment is done 2396 if (conn){ 2397 // remove entry 2398 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2399 btstack_memory_hci_connection_free( conn ); 2400 } 2401 return; 2402 } 2403 #endif 2404 2405 // on success, both hosts receive connection complete event 2406 if (packet[6] == HCI_ROLE_MASTER){ 2407 #ifdef ENABLE_LE_CENTRAL 2408 // if we're master on an le connection, it was an outgoing connection and we're done with it 2409 // note: no hci_connection_t object exists yet for connect with whitelist 2410 if (hci_is_le_connection_type(addr_type)){ 2411 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2412 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2413 } 2414 #endif 2415 } else { 2416 #ifdef ENABLE_LE_PERIPHERAL 2417 // if we're slave, it was an incoming connection, advertisements have stopped 2418 hci_stack->le_advertisements_active = false; 2419 #endif 2420 } 2421 2422 // LE connections are auto-accepted, so just create a connection if there isn't one already 2423 if (!conn){ 2424 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2425 } 2426 2427 // no memory, sorry. 2428 if (!conn){ 2429 return; 2430 } 2431 2432 conn->state = OPEN; 2433 conn->role = packet[6]; 2434 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2435 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2436 2437 #ifdef ENABLE_LE_PERIPHERAL 2438 if (packet[6] == HCI_ROLE_SLAVE){ 2439 hci_update_advertisements_enabled_for_current_roles(); 2440 } 2441 #endif 2442 2443 // init unenhanced att bearer mtu 2444 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2445 conn->att_connection.mtu_exchanged = false; 2446 2447 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2448 2449 // restart timer 2450 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2451 // btstack_run_loop_add_timer(&conn->timeout); 2452 2453 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2454 2455 hci_emit_nr_connections_changed(); 2456 } 2457 #endif 2458 2459 #ifdef ENABLE_CLASSIC 2460 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){ 2461 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2462 // LEVEL_4 is tested by l2cap 2463 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2464 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2465 if (level >= LEVEL_3){ 2466 // MITM not possible without keyboard or display 2467 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2468 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2469 2470 // MITM possible if one side has keyboard and the other has keyboard or display 2471 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2472 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2473 2474 // MITM not possible if one side has only display and other side has no keyboard 2475 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2476 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2477 } 2478 // LEVEL 2 requires SSP, which is a given 2479 return true; 2480 } 2481 2482 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2483 uint16_t i; 2484 for (i=0; i < size ; i++){ 2485 if (data[i] != 0) { 2486 return false; 2487 } 2488 } 2489 return true; 2490 } 2491 2492 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2493 // get requested security level 2494 gap_security_level_t requested_security_level = conn->requested_security_level; 2495 if (hci_stack->gap_secure_connections_only_mode){ 2496 requested_security_level = LEVEL_4; 2497 } 2498 2499 // assess security: LEVEL 4 requires SC 2500 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2501 if ((requested_security_level == LEVEL_4) && 2502 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2503 !hci_remote_sc_enabled(conn)){ 2504 log_info("Level 4 required, but SC not supported -> abort"); 2505 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2506 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2507 return; 2508 } 2509 2510 // assess security based on io capabilities 2511 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2512 // responder: fully validate io caps of both sides as well as OOB data 2513 bool security_possible = false; 2514 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2515 2516 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2517 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2518 // so we merge the OOB data availability 2519 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2520 if (conn->classic_oob_c_192 != NULL){ 2521 have_oob_data |= 1; 2522 } 2523 if (conn->classic_oob_c_256 != NULL){ 2524 have_oob_data |= 2; 2525 } 2526 // for up to Level 3, either P-192 as well as P-256 will do 2527 // 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 2528 // if remote does not SC, we should not receive P-256 data either 2529 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2530 security_possible = true; 2531 } 2532 // for Level 4, P-256 is needed 2533 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2534 security_possible = true; 2535 } 2536 #endif 2537 2538 if (security_possible == false){ 2539 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2540 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2541 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2542 return; 2543 } 2544 } else { 2545 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2546 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2547 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2548 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2549 log_info("Level 3+ required, but no input/output -> abort"); 2550 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2551 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2552 return; 2553 } 2554 #endif 2555 #endif 2556 } 2557 2558 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2559 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2560 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2561 } else { 2562 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2563 } 2564 #endif 2565 } 2566 2567 #endif 2568 2569 static void event_handler(uint8_t *packet, uint16_t size){ 2570 2571 uint16_t event_length = packet[1]; 2572 2573 // assert packet is complete 2574 if (size != (event_length + 2u)){ 2575 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2576 return; 2577 } 2578 2579 bd_addr_type_t addr_type; 2580 hci_con_handle_t handle; 2581 hci_connection_t * conn; 2582 int i; 2583 int create_connection_cmd; 2584 2585 #ifdef ENABLE_CLASSIC 2586 hci_link_type_t link_type; 2587 bd_addr_t addr; 2588 #endif 2589 2590 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2591 2592 switch (hci_event_packet_get_type(packet)) { 2593 2594 case HCI_EVENT_COMMAND_COMPLETE: 2595 handle_command_complete_event(packet, size); 2596 break; 2597 2598 case HCI_EVENT_COMMAND_STATUS: 2599 // get num cmd packets - limit to 1 to reduce complexity 2600 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2601 2602 // check command status to detected failed outgoing connections 2603 create_connection_cmd = 0; 2604 #ifdef ENABLE_CLASSIC 2605 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2606 create_connection_cmd = 1; 2607 } 2608 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_accept_synchronous_connection)){ 2609 create_connection_cmd = 1; 2610 } 2611 #endif 2612 #ifdef ENABLE_LE_CENTRAL 2613 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2614 create_connection_cmd = 1; 2615 } 2616 #endif 2617 if (create_connection_cmd) { 2618 uint8_t status = hci_event_command_status_get_status(packet); 2619 addr_type = hci_stack->outgoing_addr_type; 2620 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2621 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); 2622 2623 // reset outgoing address info 2624 memset(hci_stack->outgoing_addr, 0, 6); 2625 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2626 2627 // on error 2628 if (status != ERROR_CODE_SUCCESS){ 2629 #ifdef ENABLE_LE_CENTRAL 2630 if (hci_is_le_connection_type(addr_type)){ 2631 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2632 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2633 } 2634 #endif 2635 // error => outgoing connection failed 2636 if (conn != NULL){ 2637 hci_handle_connection_failed(conn, status); 2638 } 2639 } 2640 } 2641 2642 #ifdef ENABLE_CLASSIC 2643 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2644 uint8_t status = hci_event_command_status_get_status(packet); 2645 log_info("command status (inquiry), status %x", status); 2646 if (status == ERROR_CODE_SUCCESS) { 2647 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2648 } else { 2649 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2650 } 2651 } 2652 #endif 2653 break; 2654 2655 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2656 if (size < 3) return; 2657 uint16_t num_handles = packet[2]; 2658 if (size != (3u + num_handles * 4u)) return; 2659 uint16_t offset = 3; 2660 for (i=0; i<num_handles;i++){ 2661 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2662 offset += 2u; 2663 uint16_t num_packets = little_endian_read_16(packet, offset); 2664 offset += 2u; 2665 2666 conn = hci_connection_for_handle(handle); 2667 if (!conn){ 2668 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2669 continue; 2670 } 2671 2672 if (conn->num_packets_sent >= num_packets){ 2673 conn->num_packets_sent -= num_packets; 2674 } else { 2675 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2676 conn->num_packets_sent = 0; 2677 } 2678 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2679 2680 #ifdef ENABLE_CLASSIC 2681 // For SCO, we do the can_send_now_check here 2682 hci_notify_if_sco_can_send_now(); 2683 #endif 2684 } 2685 break; 2686 } 2687 2688 #ifdef ENABLE_CLASSIC 2689 case HCI_EVENT_INQUIRY_COMPLETE: 2690 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2691 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2692 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2693 hci_emit_event(event, sizeof(event), 1); 2694 } 2695 break; 2696 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2697 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2698 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2699 } 2700 break; 2701 case HCI_EVENT_CONNECTION_REQUEST: 2702 reverse_bd_addr(&packet[2], addr); 2703 link_type = (hci_link_type_t) packet[11]; 2704 2705 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2706 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2707 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2708 bd_addr_copy(hci_stack->decline_addr, addr); 2709 break; 2710 } 2711 2712 if (hci_stack->gap_classic_accept_callback != NULL){ 2713 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2714 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2715 bd_addr_copy(hci_stack->decline_addr, addr); 2716 break; 2717 } 2718 } 2719 2720 // TODO: eval COD 8-10 2721 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2722 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2723 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2724 if (!conn) { 2725 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2726 } 2727 if (!conn) { 2728 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2729 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2730 bd_addr_copy(hci_stack->decline_addr, addr); 2731 hci_run(); 2732 // avoid event to higher layer 2733 return; 2734 } 2735 conn->role = HCI_ROLE_SLAVE; 2736 conn->state = RECEIVED_CONNECTION_REQUEST; 2737 // store info about eSCO 2738 if (link_type == HCI_LINK_TYPE_ESCO){ 2739 conn->remote_supported_features[0] |= 1; 2740 } 2741 hci_run(); 2742 break; 2743 2744 case HCI_EVENT_CONNECTION_COMPLETE: 2745 // Connection management 2746 reverse_bd_addr(&packet[5], addr); 2747 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2748 addr_type = BD_ADDR_TYPE_ACL; 2749 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2750 if (conn) { 2751 if (!packet[2]){ 2752 conn->state = OPEN; 2753 conn->con_handle = little_endian_read_16(packet, 3); 2754 2755 // queue set supervision timeout if we're master 2756 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2757 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2758 } 2759 2760 // restart timer 2761 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2762 btstack_run_loop_add_timer(&conn->timeout); 2763 2764 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2765 2766 hci_emit_nr_connections_changed(); 2767 } else { 2768 // connection failed 2769 hci_handle_connection_failed(conn, packet[2]); 2770 } 2771 } 2772 break; 2773 2774 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2775 reverse_bd_addr(&packet[5], addr); 2776 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2777 log_info("Synchronous Connection Complete for %p (status=%u) %s", conn, packet[2], bd_addr_to_str(addr)); 2778 if (packet[2]){ 2779 // connection failed 2780 if (conn){ 2781 hci_handle_connection_failed(conn, packet[2]); 2782 } 2783 break; 2784 } 2785 if (!conn) { 2786 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2787 } 2788 if (!conn) { 2789 break; 2790 } 2791 conn->state = OPEN; 2792 conn->con_handle = little_endian_read_16(packet, 3); 2793 2794 #ifdef ENABLE_SCO_OVER_HCI 2795 // update SCO 2796 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2797 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2798 } 2799 // trigger can send now 2800 if (hci_have_usb_transport()){ 2801 hci_stack->sco_can_send_now = true; 2802 } 2803 #endif 2804 #ifdef HAVE_SCO_TRANSPORT 2805 // configure sco transport 2806 if (hci_stack->sco_transport != NULL){ 2807 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2808 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2809 } 2810 #endif 2811 break; 2812 2813 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2814 handle = little_endian_read_16(packet, 3); 2815 conn = hci_connection_for_handle(handle); 2816 if (!conn) break; 2817 if (!packet[2]){ 2818 const uint8_t * features = &packet[5]; 2819 hci_handle_remote_features_page_0(conn, features); 2820 2821 // read extended features if possible 2822 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2823 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2824 break; 2825 } 2826 } 2827 hci_handle_remote_features_received(conn); 2828 break; 2829 2830 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2831 handle = little_endian_read_16(packet, 3); 2832 conn = hci_connection_for_handle(handle); 2833 if (!conn) break; 2834 // status = ok, page = 1 2835 if (!packet[2]) { 2836 uint8_t page_number = packet[5]; 2837 uint8_t maximum_page_number = packet[6]; 2838 const uint8_t * features = &packet[7]; 2839 bool done = false; 2840 switch (page_number){ 2841 case 1: 2842 hci_handle_remote_features_page_1(conn, features); 2843 if (maximum_page_number >= 2){ 2844 // get Secure Connections (Controller) from Page 2 if available 2845 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2846 } else { 2847 // otherwise, assume SC (Controller) == SC (Host) 2848 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2849 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2850 } 2851 done = true; 2852 } 2853 break; 2854 case 2: 2855 hci_handle_remote_features_page_2(conn, features); 2856 done = true; 2857 break; 2858 default: 2859 break; 2860 } 2861 if (!done) break; 2862 } 2863 hci_handle_remote_features_received(conn); 2864 break; 2865 2866 case HCI_EVENT_LINK_KEY_REQUEST: 2867 #ifndef ENABLE_EXPLICIT_LINK_KEY_REPLY 2868 hci_event_link_key_request_get_bd_addr(packet, addr); 2869 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2870 if (!conn) break; 2871 2872 // lookup link key in db if not cached 2873 if ((conn->link_key_type == INVALID_LINK_KEY) && (hci_stack->link_key_db != NULL)){ 2874 hci_stack->link_key_db->get_link_key(conn->address, conn->link_key, &conn->link_key_type); 2875 } 2876 2877 // response sent by hci_run() 2878 conn->authentication_flags |= AUTH_FLAG_HANDLE_LINK_KEY_REQUEST; 2879 #endif 2880 break; 2881 2882 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2883 hci_event_link_key_request_get_bd_addr(packet, addr); 2884 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2885 if (!conn) break; 2886 2887 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2888 2889 // CVE-2020-26555: ignore NULL link key 2890 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2891 if (btstack_is_null(&packet[8], 16)) break; 2892 2893 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2894 // Change Connection Encryption keeps link key type 2895 if (link_key_type != CHANGED_COMBINATION_KEY){ 2896 conn->link_key_type = link_key_type; 2897 } 2898 2899 // cache link key. link keys stored in little-endian format for legacy reasons 2900 memcpy(&conn->link_key, &packet[8], 16); 2901 2902 // only store link key: 2903 // - if bondable enabled 2904 if (hci_stack->bondable == false) break; 2905 // - if security level sufficient 2906 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2907 // - for SSP, also check if remote side requested bonding as well 2908 if (conn->link_key_type != COMBINATION_KEY){ 2909 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2910 if (!remote_bonding){ 2911 break; 2912 } 2913 } 2914 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2915 break; 2916 } 2917 2918 case HCI_EVENT_PIN_CODE_REQUEST: 2919 hci_event_pin_code_request_get_bd_addr(packet, addr); 2920 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2921 if (!conn) break; 2922 2923 hci_pairing_started(conn, false); 2924 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2925 if (!hci_stack->bondable ){ 2926 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2927 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2928 hci_run(); 2929 return; 2930 } 2931 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2932 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2933 log_info("Level 4 required, but SC not supported -> abort"); 2934 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2935 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2936 hci_run(); 2937 return; 2938 } 2939 break; 2940 2941 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2942 hci_event_io_capability_response_get_bd_addr(packet, addr); 2943 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2944 if (!conn) break; 2945 2946 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2947 hci_pairing_started(conn, true); 2948 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2949 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2950 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2951 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2952 #endif 2953 break; 2954 2955 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2956 hci_event_io_capability_response_get_bd_addr(packet, addr); 2957 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2958 if (!conn) break; 2959 2960 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2961 hci_connection_timestamp(conn); 2962 hci_pairing_started(conn, true); 2963 break; 2964 2965 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2966 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2967 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2968 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2969 if (!conn) break; 2970 2971 hci_connection_timestamp(conn); 2972 2973 hci_pairing_started(conn, true); 2974 2975 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2976 break; 2977 #endif 2978 2979 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2980 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2981 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2982 if (!conn) break; 2983 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2984 if (hci_stack->ssp_auto_accept){ 2985 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2986 }; 2987 } else { 2988 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2989 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2990 // don't forward event to app 2991 hci_run(); 2992 return; 2993 } 2994 break; 2995 2996 case HCI_EVENT_USER_PASSKEY_REQUEST: 2997 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2998 if (hci_stack->ssp_auto_accept){ 2999 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 3000 }; 3001 break; 3002 3003 case HCI_EVENT_MODE_CHANGE: 3004 handle = hci_event_mode_change_get_handle(packet); 3005 conn = hci_connection_for_handle(handle); 3006 if (!conn) break; 3007 conn->connection_mode = hci_event_mode_change_get_mode(packet); 3008 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 3009 break; 3010 #endif 3011 3012 case HCI_EVENT_ENCRYPTION_CHANGE: 3013 handle = hci_event_encryption_change_get_connection_handle(packet); 3014 conn = hci_connection_for_handle(handle); 3015 if (!conn) break; 3016 if (hci_event_encryption_change_get_status(packet) == 0u) { 3017 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 3018 if (encryption_enabled){ 3019 if (hci_is_le_connection(conn)){ 3020 // For LE, we accept connection as encrypted 3021 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 3022 } 3023 #ifdef ENABLE_CLASSIC 3024 else { 3025 3026 // dedicated bonding: send result and disconnect 3027 if (conn->bonding_flags & BONDING_DEDICATED){ 3028 conn->bonding_flags &= ~BONDING_DEDICATED; 3029 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 3030 conn->bonding_status = packet[2]; 3031 break; 3032 } 3033 3034 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 3035 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 3036 bool connected_uses_aes_ccm = encryption_enabled == 2; 3037 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 3038 log_info("SC during pairing, but only E0 now -> abort"); 3039 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 3040 break; 3041 } 3042 3043 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 3044 if (connected_uses_aes_ccm){ 3045 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3046 } 3047 3048 #ifdef ENABLE_TESTING_SUPPORT 3049 // work around for issue with PTS dongle 3050 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3051 #endif 3052 3053 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 3054 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 3055 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 3056 } else { 3057 // if not, pretend everything is perfect 3058 hci_handle_read_encryption_key_size_complete(conn, 16); 3059 } 3060 } 3061 #endif 3062 } else { 3063 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 3064 } 3065 } 3066 3067 break; 3068 3069 #ifdef ENABLE_CLASSIC 3070 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 3071 handle = hci_event_authentication_complete_get_connection_handle(packet); 3072 conn = hci_connection_for_handle(handle); 3073 if (!conn) break; 3074 3075 // clear authentication active flag 3076 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 3077 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3078 3079 // authenticated only if auth status == 0 3080 if (hci_event_authentication_complete_get_status(packet) == 0){ 3081 // authenticated 3082 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3083 3084 // If not already encrypted, start encryption 3085 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3086 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3087 break; 3088 } 3089 } 3090 3091 // emit updated security level 3092 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3093 break; 3094 3095 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3096 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3097 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3098 if (!conn) break; 3099 3100 // treat successfully paired connection as authenticated 3101 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3102 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3103 } 3104 3105 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3106 break; 3107 #endif 3108 3109 // HCI_EVENT_DISCONNECTION_COMPLETE 3110 // has been split, to first notify stack before shutting connection down 3111 // see end of function, too. 3112 case HCI_EVENT_DISCONNECTION_COMPLETE: 3113 if (packet[2]) break; // status != 0 3114 handle = little_endian_read_16(packet, 3); 3115 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3116 if (hci_stack->acl_fragmentation_total_size > 0u) { 3117 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3118 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3119 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3120 hci_stack->acl_fragmentation_total_size = 0; 3121 hci_stack->acl_fragmentation_pos = 0; 3122 if (release_buffer){ 3123 hci_release_packet_buffer(); 3124 } 3125 } 3126 } 3127 3128 conn = hci_connection_for_handle(handle); 3129 if (!conn) break; 3130 #ifdef ENABLE_CLASSIC 3131 // pairing failed if it was ongoing 3132 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3133 #endif 3134 3135 // emit dedicatd bonding event 3136 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3137 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3138 } 3139 3140 // mark connection for shutdown, stop timers, reset state 3141 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3142 hci_connection_stop_timer(conn); 3143 hci_connection_init(conn); 3144 3145 #ifdef ENABLE_BLE 3146 #ifdef ENABLE_LE_PERIPHERAL 3147 // re-enable advertisements for le connections if active 3148 if (hci_is_le_connection(conn)){ 3149 hci_update_advertisements_enabled_for_current_roles(); 3150 } 3151 #endif 3152 #endif 3153 break; 3154 3155 case HCI_EVENT_HARDWARE_ERROR: 3156 log_error("Hardware Error: 0x%02x", packet[2]); 3157 if (hci_stack->hardware_error_callback){ 3158 (*hci_stack->hardware_error_callback)(packet[2]); 3159 } else { 3160 // if no special requests, just reboot stack 3161 hci_power_control_off(); 3162 hci_power_control_on(); 3163 } 3164 break; 3165 3166 #ifdef ENABLE_CLASSIC 3167 case HCI_EVENT_ROLE_CHANGE: 3168 if (packet[2]) break; // status != 0 3169 reverse_bd_addr(&packet[3], addr); 3170 addr_type = BD_ADDR_TYPE_ACL; 3171 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3172 if (!conn) break; 3173 conn->role = packet[9]; 3174 break; 3175 #endif 3176 3177 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3178 // release packet buffer only for asynchronous transport and if there are not further fragements 3179 if (hci_transport_synchronous()) { 3180 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3181 return; // instead of break: to avoid re-entering hci_run() 3182 } 3183 hci_stack->acl_fragmentation_tx_active = 0; 3184 if (hci_stack->acl_fragmentation_total_size) break; 3185 hci_release_packet_buffer(); 3186 3187 // L2CAP receives this event via the hci_emit_event below 3188 3189 #ifdef ENABLE_CLASSIC 3190 // For SCO, we do the can_send_now_check here 3191 hci_notify_if_sco_can_send_now(); 3192 #endif 3193 break; 3194 3195 #ifdef ENABLE_CLASSIC 3196 case HCI_EVENT_SCO_CAN_SEND_NOW: 3197 // For SCO, we do the can_send_now_check here 3198 hci_stack->sco_can_send_now = true; 3199 hci_notify_if_sco_can_send_now(); 3200 return; 3201 3202 // explode inquriy results for easier consumption 3203 case HCI_EVENT_INQUIRY_RESULT: 3204 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3205 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3206 gap_inquiry_explode(packet, size); 3207 break; 3208 #endif 3209 3210 #ifdef ENABLE_BLE 3211 case HCI_EVENT_LE_META: 3212 switch (packet[2]){ 3213 #ifdef ENABLE_LE_CENTRAL 3214 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3215 // log_info("advertising report received"); 3216 if (!hci_stack->le_scanning_enabled) break; 3217 le_handle_advertisement_report(packet, size); 3218 break; 3219 #endif 3220 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3221 event_handle_le_connection_complete(packet); 3222 break; 3223 3224 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3225 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3226 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3227 conn = hci_connection_for_handle(handle); 3228 if (!conn) break; 3229 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3230 break; 3231 3232 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3233 // connection 3234 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3235 conn = hci_connection_for_handle(handle); 3236 if (conn) { 3237 // read arguments 3238 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3239 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3240 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3241 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3242 3243 // validate against current connection parameter range 3244 le_connection_parameter_range_t existing_range; 3245 gap_get_connection_parameter_range(&existing_range); 3246 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3247 if (update_parameter){ 3248 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3249 conn->le_conn_interval_min = le_conn_interval_min; 3250 conn->le_conn_interval_max = le_conn_interval_max; 3251 conn->le_conn_latency = le_conn_latency; 3252 conn->le_supervision_timeout = le_supervision_timeout; 3253 } else { 3254 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3255 } 3256 } 3257 break; 3258 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3259 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3260 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3261 conn = hci_connection_for_handle(handle); 3262 if (conn) { 3263 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3264 } 3265 break; 3266 #endif 3267 default: 3268 break; 3269 } 3270 break; 3271 #endif 3272 case HCI_EVENT_VENDOR_SPECIFIC: 3273 // Vendor specific commands often create vendor specific event instead of num completed packets 3274 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3275 switch (hci_stack->manufacturer){ 3276 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3277 hci_stack->num_cmd_packets = 1; 3278 break; 3279 default: 3280 break; 3281 } 3282 break; 3283 default: 3284 break; 3285 } 3286 3287 handle_event_for_current_stack_state(packet, size); 3288 3289 // notify upper stack 3290 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3291 3292 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3293 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3294 handle = little_endian_read_16(packet, 3); 3295 hci_connection_t * aConn = hci_connection_for_handle(handle); 3296 // discard connection if app did not trigger a reconnect in the event handler 3297 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3298 hci_shutdown_connection(aConn); 3299 } 3300 } 3301 3302 // execute main loop 3303 hci_run(); 3304 } 3305 3306 #ifdef ENABLE_CLASSIC 3307 3308 #ifdef ENABLE_SCO_OVER_HCI 3309 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3310 static void sco_schedule_tx(hci_connection_t * conn); 3311 3312 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3313 log_debug("SCO TX Timeout"); 3314 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3315 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3316 if (!conn) return; 3317 3318 // trigger send 3319 conn->sco_tx_ready = 1; 3320 // extra packet if CVSD but SCO buffer is too short 3321 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3322 conn->sco_tx_ready++; 3323 } 3324 hci_notify_if_sco_can_send_now(); 3325 } 3326 3327 3328 #define SCO_TX_AFTER_RX_MS (6) 3329 3330 static void sco_schedule_tx(hci_connection_t * conn){ 3331 3332 uint32_t now = btstack_run_loop_get_time_ms(); 3333 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3334 int time_delta_ms = sco_tx_ms - now; 3335 3336 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3337 3338 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3339 btstack_run_loop_remove_timer(timer); 3340 btstack_run_loop_set_timer(timer, time_delta_ms); 3341 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3342 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3343 btstack_run_loop_add_timer(timer); 3344 } 3345 #endif 3346 3347 static void sco_handler(uint8_t * packet, uint16_t size){ 3348 // lookup connection struct 3349 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3350 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3351 if (!conn) return; 3352 3353 #ifdef ENABLE_SCO_OVER_HCI 3354 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3355 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3356 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3357 packet[2] = 0x3c; 3358 memmove(&packet[3], &packet[23], 63); 3359 size = 63; 3360 } 3361 } 3362 3363 if (hci_have_usb_transport()){ 3364 // Nothing to do 3365 } else { 3366 // 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); 3367 if (hci_stack->synchronous_flow_control_enabled == 0){ 3368 uint32_t now = btstack_run_loop_get_time_ms(); 3369 3370 if (!conn->sco_rx_valid){ 3371 // ignore first 10 packets 3372 conn->sco_rx_count++; 3373 // log_debug("sco rx count %u", conn->sco_rx_count); 3374 if (conn->sco_rx_count == 10) { 3375 // use first timestamp as is and pretent it just started 3376 conn->sco_rx_ms = now; 3377 conn->sco_rx_valid = 1; 3378 conn->sco_rx_count = 0; 3379 sco_schedule_tx(conn); 3380 } 3381 } else { 3382 // track expected arrival timme 3383 conn->sco_rx_count++; 3384 conn->sco_rx_ms += 7; 3385 int delta = (int32_t) (now - conn->sco_rx_ms); 3386 if (delta > 0){ 3387 conn->sco_rx_ms++; 3388 } 3389 // log_debug("sco rx %u", conn->sco_rx_ms); 3390 sco_schedule_tx(conn); 3391 } 3392 } 3393 } 3394 #endif 3395 3396 // deliver to app 3397 if (hci_stack->sco_packet_handler) { 3398 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3399 } 3400 3401 #ifdef HAVE_SCO_TRANSPORT 3402 // We can send one packet for each received packet 3403 conn->sco_tx_ready++; 3404 hci_notify_if_sco_can_send_now(); 3405 #endif 3406 3407 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3408 conn->num_packets_completed++; 3409 hci_stack->host_completed_packets = 1; 3410 hci_run(); 3411 #endif 3412 } 3413 #endif 3414 3415 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3416 hci_dump_packet(packet_type, 1, packet, size); 3417 switch (packet_type) { 3418 case HCI_EVENT_PACKET: 3419 event_handler(packet, size); 3420 break; 3421 case HCI_ACL_DATA_PACKET: 3422 acl_handler(packet, size); 3423 break; 3424 #ifdef ENABLE_CLASSIC 3425 case HCI_SCO_DATA_PACKET: 3426 sco_handler(packet, size); 3427 break; 3428 #endif 3429 default: 3430 break; 3431 } 3432 } 3433 3434 /** 3435 * @brief Add event packet handler. 3436 */ 3437 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3438 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3439 } 3440 3441 /** 3442 * @brief Remove event packet handler. 3443 */ 3444 void hci_remove_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3445 btstack_linked_list_remove(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3446 } 3447 3448 /** Register HCI packet handlers */ 3449 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3450 hci_stack->acl_packet_handler = handler; 3451 } 3452 3453 #ifdef ENABLE_CLASSIC 3454 /** 3455 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3456 */ 3457 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3458 hci_stack->sco_packet_handler = handler; 3459 } 3460 #endif 3461 3462 static void hci_state_reset(void){ 3463 // no connections yet 3464 hci_stack->connections = NULL; 3465 3466 // keep discoverable/connectable as this has been requested by the client(s) 3467 // hci_stack->discoverable = 0; 3468 // hci_stack->connectable = 0; 3469 // hci_stack->bondable = 1; 3470 // hci_stack->own_addr_type = 0; 3471 3472 // buffer is free 3473 hci_stack->hci_packet_buffer_reserved = false; 3474 3475 // no pending cmds 3476 hci_stack->decline_reason = 0; 3477 3478 hci_stack->secure_connections_active = false; 3479 3480 #ifdef ENABLE_CLASSIC 3481 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3482 hci_stack->page_timeout = 0x6000; // ca. 15 sec 3483 3484 hci_stack->gap_tasks = 3485 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3486 GAP_TASK_SET_CLASS_OF_DEVICE | 3487 GAP_TASK_SET_LOCAL_NAME | 3488 GAP_TASK_SET_EIR_DATA | 3489 GAP_TASK_WRITE_SCAN_ENABLE | 3490 GAP_TASK_WRITE_PAGE_TIMEOUT; 3491 #endif 3492 3493 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3494 hci_stack->classic_read_local_oob_data = false; 3495 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3496 #endif 3497 3498 // LE 3499 #ifdef ENABLE_BLE 3500 memset(hci_stack->le_random_address, 0, 6); 3501 hci_stack->le_random_address_set = 0; 3502 #endif 3503 #ifdef ENABLE_LE_CENTRAL 3504 hci_stack->le_scanning_active = false; 3505 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3506 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3507 hci_stack->le_whitelist_capacity = 0; 3508 #endif 3509 #ifdef ENABLE_LE_PERIPHERAL 3510 hci_stack->le_advertisements_active = false; 3511 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3512 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3513 } 3514 if (hci_stack->le_advertisements_data != NULL){ 3515 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3516 } 3517 #endif 3518 } 3519 3520 #ifdef ENABLE_CLASSIC 3521 /** 3522 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3523 */ 3524 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3525 // store and open remote device db 3526 hci_stack->link_key_db = link_key_db; 3527 if (hci_stack->link_key_db) { 3528 hci_stack->link_key_db->open(); 3529 } 3530 } 3531 #endif 3532 3533 void hci_init(const hci_transport_t *transport, const void *config){ 3534 3535 #ifdef HAVE_MALLOC 3536 if (!hci_stack) { 3537 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3538 } 3539 #else 3540 hci_stack = &hci_stack_static; 3541 #endif 3542 memset(hci_stack, 0, sizeof(hci_stack_t)); 3543 3544 // reference to use transport layer implementation 3545 hci_stack->hci_transport = transport; 3546 3547 // reference to used config 3548 hci_stack->config = config; 3549 3550 // setup pointer for outgoing packet buffer 3551 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3552 3553 // max acl payload size defined in config.h 3554 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3555 3556 // register packet handlers with transport 3557 transport->register_packet_handler(&packet_handler); 3558 3559 hci_stack->state = HCI_STATE_OFF; 3560 3561 // class of device 3562 hci_stack->class_of_device = 0x007a020c; // Smartphone 3563 3564 // bondable by default 3565 hci_stack->bondable = 1; 3566 3567 #ifdef ENABLE_CLASSIC 3568 // classic name 3569 hci_stack->local_name = default_classic_name; 3570 3571 // Master slave policy 3572 hci_stack->master_slave_policy = 1; 3573 3574 // Allow Role Switch 3575 hci_stack->allow_role_switch = 1; 3576 3577 // Default / minimum security level = 2 3578 hci_stack->gap_security_level = LEVEL_2; 3579 3580 // Default Security Mode 4 3581 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3582 3583 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3584 hci_stack->gap_required_encyrption_key_size = 7; 3585 3586 // Link Supervision Timeout 3587 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3588 3589 #endif 3590 3591 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3592 hci_stack->ssp_enable = 1; 3593 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3594 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3595 hci_stack->ssp_auto_accept = 1; 3596 3597 // Secure Connections: enable (requires support from Controller) 3598 hci_stack->secure_connections_enable = true; 3599 3600 // voice setting - signed 16 bit pcm data with CVSD over the air 3601 hci_stack->sco_voice_setting = 0x60; 3602 3603 #ifdef ENABLE_LE_CENTRAL 3604 // connection parameter to use for outgoing connections 3605 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3606 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3607 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3608 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3609 hci_stack->le_connection_latency = 4; // 4 3610 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3611 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3612 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3613 3614 // default LE Scanning 3615 hci_stack->le_scan_type = 0x1; // active 3616 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3617 hci_stack->le_scan_window = 0x30; // 30 ms 3618 #endif 3619 3620 #ifdef ENABLE_LE_PERIPHERAL 3621 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3622 #endif 3623 3624 // connection parameter range used to answer connection parameter update requests in l2cap 3625 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3626 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3627 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3628 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3629 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3630 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3631 3632 hci_state_reset(); 3633 } 3634 3635 void hci_deinit(void){ 3636 #ifdef HAVE_MALLOC 3637 if (hci_stack) { 3638 free(hci_stack); 3639 } 3640 #endif 3641 hci_stack = NULL; 3642 3643 #ifdef ENABLE_CLASSIC 3644 disable_l2cap_timeouts = 0; 3645 #endif 3646 } 3647 3648 /** 3649 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3650 */ 3651 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3652 hci_stack->chipset = chipset_driver; 3653 3654 // reset chipset driver - init is also called on power_up 3655 if (hci_stack->chipset && hci_stack->chipset->init){ 3656 hci_stack->chipset->init(hci_stack->config); 3657 } 3658 } 3659 3660 /** 3661 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3662 */ 3663 void hci_set_control(const btstack_control_t *hardware_control){ 3664 // references to used control implementation 3665 hci_stack->control = hardware_control; 3666 // init with transport config 3667 hardware_control->init(hci_stack->config); 3668 } 3669 3670 static void hci_discard_connections(void){ 3671 btstack_linked_list_iterator_t lit; 3672 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3673 while (btstack_linked_list_iterator_has_next(&lit)){ 3674 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3675 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3676 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3677 hci_shutdown_connection(connection); 3678 } 3679 } 3680 3681 void hci_close(void){ 3682 3683 #ifdef ENABLE_CLASSIC 3684 // close remote device db 3685 if (hci_stack->link_key_db) { 3686 hci_stack->link_key_db->close(); 3687 } 3688 #endif 3689 3690 hci_discard_connections(); 3691 3692 hci_power_control(HCI_POWER_OFF); 3693 3694 #ifdef HAVE_MALLOC 3695 free(hci_stack); 3696 #endif 3697 hci_stack = NULL; 3698 } 3699 3700 #ifdef HAVE_SCO_TRANSPORT 3701 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3702 hci_stack->sco_transport = sco_transport; 3703 sco_transport->register_packet_handler(&packet_handler); 3704 } 3705 #endif 3706 3707 #ifdef ENABLE_CLASSIC 3708 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3709 // validate ranage and set 3710 if (encryption_key_size < 7) return; 3711 if (encryption_key_size > 16) return; 3712 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3713 } 3714 3715 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3716 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3717 hci_stack->gap_security_mode = security_mode; 3718 return ERROR_CODE_SUCCESS; 3719 } else { 3720 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3721 } 3722 } 3723 3724 gap_security_mode_t gap_get_security_mode(void){ 3725 return hci_stack->gap_security_mode; 3726 } 3727 3728 void gap_set_security_level(gap_security_level_t security_level){ 3729 hci_stack->gap_security_level = security_level; 3730 } 3731 3732 gap_security_level_t gap_get_security_level(void){ 3733 if (hci_stack->gap_secure_connections_only_mode){ 3734 return LEVEL_4; 3735 } 3736 return hci_stack->gap_security_level; 3737 } 3738 3739 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3740 hci_stack->gap_minimal_service_security_level = security_level; 3741 } 3742 3743 void gap_set_secure_connections_only_mode(bool enable){ 3744 hci_stack->gap_secure_connections_only_mode = enable; 3745 } 3746 3747 bool gap_get_secure_connections_only_mode(void){ 3748 return hci_stack->gap_secure_connections_only_mode; 3749 } 3750 #endif 3751 3752 #ifdef ENABLE_CLASSIC 3753 void gap_set_class_of_device(uint32_t class_of_device){ 3754 hci_stack->class_of_device = class_of_device; 3755 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3756 hci_run(); 3757 } 3758 3759 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3760 hci_stack->default_link_policy_settings = default_link_policy_settings; 3761 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3762 hci_run(); 3763 } 3764 3765 void gap_set_allow_role_switch(bool allow_role_switch){ 3766 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3767 } 3768 3769 uint8_t hci_get_allow_role_switch(void){ 3770 return hci_stack->allow_role_switch; 3771 } 3772 3773 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3774 hci_stack->link_supervision_timeout = link_supervision_timeout; 3775 } 3776 3777 void hci_disable_l2cap_timeout_check(void){ 3778 disable_l2cap_timeouts = 1; 3779 } 3780 #endif 3781 3782 #ifndef HAVE_HOST_CONTROLLER_API 3783 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3784 void hci_set_bd_addr(bd_addr_t addr){ 3785 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3786 hci_stack->custom_bd_addr_set = 1; 3787 } 3788 #endif 3789 3790 // State-Module-Driver overview 3791 // state module low-level 3792 // HCI_STATE_OFF off close 3793 // HCI_STATE_INITIALIZING, on open 3794 // HCI_STATE_WORKING, on open 3795 // HCI_STATE_HALTING, on open 3796 // HCI_STATE_SLEEPING, off/sleep close 3797 // HCI_STATE_FALLING_ASLEEP on open 3798 3799 static int hci_power_control_on(void){ 3800 3801 // power on 3802 int err = 0; 3803 if (hci_stack->control && hci_stack->control->on){ 3804 err = (*hci_stack->control->on)(); 3805 } 3806 if (err){ 3807 log_error( "POWER_ON failed"); 3808 hci_emit_hci_open_failed(); 3809 return err; 3810 } 3811 3812 // int chipset driver 3813 if (hci_stack->chipset && hci_stack->chipset->init){ 3814 hci_stack->chipset->init(hci_stack->config); 3815 } 3816 3817 // init transport 3818 if (hci_stack->hci_transport->init){ 3819 hci_stack->hci_transport->init(hci_stack->config); 3820 } 3821 3822 // open transport 3823 err = hci_stack->hci_transport->open(); 3824 if (err){ 3825 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3826 if (hci_stack->control && hci_stack->control->off){ 3827 (*hci_stack->control->off)(); 3828 } 3829 hci_emit_hci_open_failed(); 3830 return err; 3831 } 3832 return 0; 3833 } 3834 3835 static void hci_power_control_off(void){ 3836 3837 log_info("hci_power_control_off"); 3838 3839 // close low-level device 3840 hci_stack->hci_transport->close(); 3841 3842 log_info("hci_power_control_off - hci_transport closed"); 3843 3844 // power off 3845 if (hci_stack->control && hci_stack->control->off){ 3846 (*hci_stack->control->off)(); 3847 } 3848 3849 log_info("hci_power_control_off - control closed"); 3850 3851 hci_stack->state = HCI_STATE_OFF; 3852 } 3853 3854 static void hci_power_control_sleep(void){ 3855 3856 log_info("hci_power_control_sleep"); 3857 3858 #if 0 3859 // don't close serial port during sleep 3860 3861 // close low-level device 3862 hci_stack->hci_transport->close(hci_stack->config); 3863 #endif 3864 3865 // sleep mode 3866 if (hci_stack->control && hci_stack->control->sleep){ 3867 (*hci_stack->control->sleep)(); 3868 } 3869 3870 hci_stack->state = HCI_STATE_SLEEPING; 3871 } 3872 3873 static int hci_power_control_wake(void){ 3874 3875 log_info("hci_power_control_wake"); 3876 3877 // wake on 3878 if (hci_stack->control && hci_stack->control->wake){ 3879 (*hci_stack->control->wake)(); 3880 } 3881 3882 #if 0 3883 // open low-level device 3884 int err = hci_stack->hci_transport->open(hci_stack->config); 3885 if (err){ 3886 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3887 if (hci_stack->control && hci_stack->control->off){ 3888 (*hci_stack->control->off)(); 3889 } 3890 hci_emit_hci_open_failed(); 3891 return err; 3892 } 3893 #endif 3894 3895 return 0; 3896 } 3897 3898 static void hci_power_transition_to_initializing(void){ 3899 // set up state machine 3900 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3901 hci_stack->hci_packet_buffer_reserved = false; 3902 hci_stack->state = HCI_STATE_INITIALIZING; 3903 hci_stack->substate = HCI_INIT_SEND_RESET; 3904 } 3905 3906 // returns error 3907 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3908 int err; 3909 switch (power_mode){ 3910 case HCI_POWER_ON: 3911 err = hci_power_control_on(); 3912 if (err != 0) { 3913 log_error("hci_power_control_on() error %d", err); 3914 return err; 3915 } 3916 hci_power_transition_to_initializing(); 3917 break; 3918 case HCI_POWER_OFF: 3919 // do nothing 3920 break; 3921 case HCI_POWER_SLEEP: 3922 // do nothing (with SLEEP == OFF) 3923 break; 3924 default: 3925 btstack_assert(false); 3926 break; 3927 } 3928 return ERROR_CODE_SUCCESS; 3929 } 3930 3931 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3932 switch (power_mode){ 3933 case HCI_POWER_ON: 3934 // do nothing 3935 break; 3936 case HCI_POWER_OFF: 3937 // no connections yet, just turn it off 3938 hci_power_control_off(); 3939 break; 3940 case HCI_POWER_SLEEP: 3941 // no connections yet, just turn it off 3942 hci_power_control_sleep(); 3943 break; 3944 default: 3945 btstack_assert(false); 3946 break; 3947 } 3948 return ERROR_CODE_SUCCESS; 3949 } 3950 3951 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3952 switch (power_mode){ 3953 case HCI_POWER_ON: 3954 // do nothing 3955 break; 3956 case HCI_POWER_OFF: 3957 // see hci_run 3958 hci_stack->state = HCI_STATE_HALTING; 3959 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3960 // setup watchdog timer for disconnect - only triggers if Controller does not respond anymore 3961 btstack_run_loop_set_timer(&hci_stack->timeout, 1000); 3962 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 3963 btstack_run_loop_add_timer(&hci_stack->timeout); 3964 break; 3965 case HCI_POWER_SLEEP: 3966 // see hci_run 3967 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3968 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3969 break; 3970 default: 3971 btstack_assert(false); 3972 break; 3973 } 3974 return ERROR_CODE_SUCCESS; 3975 } 3976 3977 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3978 switch (power_mode){ 3979 case HCI_POWER_ON: 3980 hci_power_transition_to_initializing(); 3981 break; 3982 case HCI_POWER_OFF: 3983 // do nothing 3984 break; 3985 case HCI_POWER_SLEEP: 3986 // see hci_run 3987 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3988 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3989 break; 3990 default: 3991 btstack_assert(false); 3992 break; 3993 } 3994 return ERROR_CODE_SUCCESS; 3995 } 3996 3997 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3998 switch (power_mode){ 3999 case HCI_POWER_ON: 4000 hci_power_transition_to_initializing(); 4001 break; 4002 case HCI_POWER_OFF: 4003 // see hci_run 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 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 4018 int err; 4019 switch (power_mode){ 4020 case HCI_POWER_ON: 4021 err = hci_power_control_wake(); 4022 if (err) return err; 4023 hci_power_transition_to_initializing(); 4024 break; 4025 case HCI_POWER_OFF: 4026 hci_stack->state = HCI_STATE_HALTING; 4027 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 4028 break; 4029 case HCI_POWER_SLEEP: 4030 // do nothing 4031 break; 4032 default: 4033 btstack_assert(false); 4034 break; 4035 } 4036 return ERROR_CODE_SUCCESS; 4037 } 4038 4039 int hci_power_control(HCI_POWER_MODE power_mode){ 4040 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 4041 int err = 0; 4042 switch (hci_stack->state){ 4043 case HCI_STATE_OFF: 4044 err = hci_power_control_state_off(power_mode); 4045 break; 4046 case HCI_STATE_INITIALIZING: 4047 err = hci_power_control_state_initializing(power_mode); 4048 break; 4049 case HCI_STATE_WORKING: 4050 err = hci_power_control_state_working(power_mode); 4051 break; 4052 case HCI_STATE_HALTING: 4053 err = hci_power_control_state_halting(power_mode); 4054 break; 4055 case HCI_STATE_FALLING_ASLEEP: 4056 err = hci_power_control_state_falling_asleep(power_mode); 4057 break; 4058 case HCI_STATE_SLEEPING: 4059 err = hci_power_control_state_sleeping(power_mode); 4060 break; 4061 default: 4062 btstack_assert(false); 4063 break; 4064 } 4065 if (err != 0){ 4066 return err; 4067 } 4068 4069 // create internal event 4070 hci_emit_state(); 4071 4072 // trigger next/first action 4073 hci_run(); 4074 4075 return 0; 4076 } 4077 4078 4079 static void hci_halting_run(void){ 4080 4081 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4082 4083 hci_connection_t * connection; 4084 4085 switch (hci_stack->substate) { 4086 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4087 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4088 4089 #ifdef ENABLE_BLE 4090 #ifdef ENABLE_LE_CENTRAL 4091 hci_whitelist_free(); 4092 #endif 4093 #endif 4094 // close all open connections 4095 connection = (hci_connection_t *) hci_stack->connections; 4096 if (connection) { 4097 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4098 if (!hci_can_send_command_packet_now()) return; 4099 4100 // check state 4101 if (connection->state == SENT_DISCONNECT) return; 4102 connection->state = SENT_DISCONNECT; 4103 4104 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4105 4106 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4107 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4108 4109 // ... which would be ignored anyway as we shutdown (free) the connection now 4110 hci_shutdown_connection(connection); 4111 4112 // finally, send the disconnect command 4113 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4114 return; 4115 } 4116 4117 btstack_run_loop_remove_timer(&hci_stack->timeout); 4118 4119 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER) { 4120 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4121 log_info("HCI_STATE_HALTING: wait 50 ms"); 4122 hci_stack->substate = HCI_HALTING_W4_TIMER; 4123 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4124 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4125 btstack_run_loop_add_timer(&hci_stack->timeout); 4126 break; 4127 } 4128 4129 /* fall through */ 4130 4131 case HCI_HALTING_CLOSE: 4132 // close left over connections (that had not been properly closed before) 4133 hci_discard_connections(); 4134 4135 log_info("HCI_STATE_HALTING, calling off"); 4136 4137 // switch mode 4138 hci_power_control_off(); 4139 4140 log_info("HCI_STATE_HALTING, emitting state"); 4141 hci_emit_state(); 4142 log_info("HCI_STATE_HALTING, done"); 4143 break; 4144 4145 case HCI_HALTING_W4_TIMER: 4146 // keep waiting 4147 4148 break; 4149 default: 4150 break; 4151 } 4152 }; 4153 4154 static void hci_falling_asleep_run(void){ 4155 hci_connection_t * connection; 4156 switch(hci_stack->substate) { 4157 case HCI_FALLING_ASLEEP_DISCONNECT: 4158 log_info("HCI_STATE_FALLING_ASLEEP"); 4159 // close all open connections 4160 connection = (hci_connection_t *) hci_stack->connections; 4161 if (connection){ 4162 4163 // send disconnect 4164 if (!hci_can_send_command_packet_now()) return; 4165 4166 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4167 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4168 4169 // send disconnected event right away - causes higher layer connections to get closed, too. 4170 hci_shutdown_connection(connection); 4171 return; 4172 } 4173 4174 if (hci_classic_supported()){ 4175 // disable page and inquiry scan 4176 if (!hci_can_send_command_packet_now()) return; 4177 4178 log_info("HCI_STATE_HALTING, disabling inq scans"); 4179 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4180 4181 // continue in next sub state 4182 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4183 break; 4184 } 4185 4186 /* fall through */ 4187 4188 case HCI_FALLING_ASLEEP_COMPLETE: 4189 log_info("HCI_STATE_HALTING, calling sleep"); 4190 // switch mode 4191 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4192 hci_emit_state(); 4193 break; 4194 4195 default: 4196 break; 4197 } 4198 } 4199 4200 #ifdef ENABLE_CLASSIC 4201 4202 static void hci_update_scan_enable(void){ 4203 // 2 = page scan, 1 = inq scan 4204 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4205 hci_stack->gap_tasks |= GAP_TASK_WRITE_SCAN_ENABLE; 4206 hci_run(); 4207 } 4208 4209 void gap_discoverable_control(uint8_t enable){ 4210 if (enable) enable = 1; // normalize argument 4211 4212 if (hci_stack->discoverable == enable){ 4213 hci_emit_discoverable_enabled(hci_stack->discoverable); 4214 return; 4215 } 4216 4217 hci_stack->discoverable = enable; 4218 hci_update_scan_enable(); 4219 } 4220 4221 void gap_connectable_control(uint8_t enable){ 4222 if (enable) enable = 1; // normalize argument 4223 4224 // don't emit event 4225 if (hci_stack->connectable == enable) return; 4226 4227 hci_stack->connectable = enable; 4228 hci_update_scan_enable(); 4229 } 4230 #endif 4231 4232 void gap_local_bd_addr(bd_addr_t address_buffer){ 4233 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4234 } 4235 4236 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4237 static void hci_host_num_completed_packets(void){ 4238 4239 // create packet manually as arrays are not supported and num_commands should not get reduced 4240 hci_reserve_packet_buffer(); 4241 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4242 4243 uint16_t size = 0; 4244 uint16_t num_handles = 0; 4245 packet[size++] = 0x35; 4246 packet[size++] = 0x0c; 4247 size++; // skip param len 4248 size++; // skip num handles 4249 4250 // add { handle, packets } entries 4251 btstack_linked_item_t * it; 4252 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4253 hci_connection_t * connection = (hci_connection_t *) it; 4254 if (connection->num_packets_completed){ 4255 little_endian_store_16(packet, size, connection->con_handle); 4256 size += 2; 4257 little_endian_store_16(packet, size, connection->num_packets_completed); 4258 size += 2; 4259 // 4260 num_handles++; 4261 connection->num_packets_completed = 0; 4262 } 4263 } 4264 4265 packet[2] = size - 3; 4266 packet[3] = num_handles; 4267 4268 hci_stack->host_completed_packets = 0; 4269 4270 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4271 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4272 4273 // release packet buffer for synchronous transport implementations 4274 if (hci_transport_synchronous()){ 4275 hci_release_packet_buffer(); 4276 hci_emit_transport_packet_sent(); 4277 } 4278 } 4279 #endif 4280 4281 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4282 UNUSED(ds); 4283 hci_stack->substate = HCI_HALTING_CLOSE; 4284 // allow packet handlers to defer final shutdown 4285 hci_emit_state(); 4286 hci_run(); 4287 } 4288 4289 static bool hci_run_acl_fragments(void){ 4290 if (hci_stack->acl_fragmentation_total_size > 0u) { 4291 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4292 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4293 if (connection) { 4294 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4295 hci_send_acl_packet_fragments(connection); 4296 return true; 4297 } 4298 } else { 4299 // connection gone -> discard further fragments 4300 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4301 hci_stack->acl_fragmentation_total_size = 0; 4302 hci_stack->acl_fragmentation_pos = 0; 4303 } 4304 } 4305 return false; 4306 } 4307 4308 #ifdef ENABLE_CLASSIC 4309 static bool hci_run_general_gap_classic(void){ 4310 4311 // assert stack is working and classic is active 4312 if (hci_classic_supported() == false) return false; 4313 if (hci_stack->state != HCI_STATE_WORKING) return false; 4314 4315 // decline incoming connections 4316 if (hci_stack->decline_reason){ 4317 uint8_t reason = hci_stack->decline_reason; 4318 hci_stack->decline_reason = 0; 4319 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4320 return true; 4321 } 4322 4323 if (hci_stack->gap_tasks != 0){ 4324 hci_run_gap_tasks_classic(); 4325 return true; 4326 } 4327 4328 // start/stop inquiry 4329 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4330 uint8_t duration = hci_stack->inquiry_state; 4331 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4332 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4333 return true; 4334 } 4335 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4336 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4337 hci_send_cmd(&hci_inquiry_cancel); 4338 return true; 4339 } 4340 // remote name request 4341 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4342 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4343 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4344 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4345 return true; 4346 } 4347 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4348 // Local OOB data 4349 if (hci_stack->classic_read_local_oob_data){ 4350 hci_stack->classic_read_local_oob_data = false; 4351 if (hci_stack->local_supported_commands[1] & 0x10u){ 4352 hci_send_cmd(&hci_read_local_extended_oob_data); 4353 } else { 4354 hci_send_cmd(&hci_read_local_oob_data); 4355 } 4356 } 4357 #endif 4358 // pairing 4359 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4360 uint8_t state = hci_stack->gap_pairing_state; 4361 uint8_t pin_code[16]; 4362 switch (state){ 4363 case GAP_PAIRING_STATE_SEND_PIN: 4364 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4365 memset(pin_code, 0, 16); 4366 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4367 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4368 break; 4369 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4370 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4371 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4372 break; 4373 case GAP_PAIRING_STATE_SEND_PASSKEY: 4374 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4375 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4376 break; 4377 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4378 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4379 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4380 break; 4381 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4382 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4383 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4384 break; 4385 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4386 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4387 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4388 break; 4389 default: 4390 break; 4391 } 4392 return true; 4393 } 4394 return false; 4395 } 4396 #endif 4397 4398 #ifdef ENABLE_BLE 4399 static bool hci_run_general_gap_le(void){ 4400 4401 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4402 4403 if (hci_stack->state != HCI_STATE_WORKING) return false; 4404 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4405 4406 4407 // Phase 1: collect what to stop 4408 4409 bool scanning_stop = false; 4410 bool connecting_stop = false; 4411 bool advertising_stop = false; 4412 4413 #ifndef ENABLE_LE_CENTRAL 4414 UNUSED(scanning_stop); 4415 UNUSED(connecting_stop); 4416 #endif 4417 #ifndef ENABLE_LE_PERIPHERAL 4418 UNUSED(advertising_stop); 4419 #endif 4420 4421 // check if own address changes 4422 bool random_address_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADDRESS) != 0; 4423 4424 // check if whitelist needs modification 4425 bool whitelist_modification_pending = false; 4426 btstack_linked_list_iterator_t lit; 4427 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4428 while (btstack_linked_list_iterator_has_next(&lit)){ 4429 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4430 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4431 whitelist_modification_pending = true; 4432 break; 4433 } 4434 } 4435 // check if resolving list needs modification 4436 bool resolving_list_modification_pending = false; 4437 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4438 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4439 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4440 resolving_list_modification_pending = true; 4441 } 4442 #endif 4443 4444 #ifdef ENABLE_LE_CENTRAL 4445 // scanning control 4446 if (hci_stack->le_scanning_active) { 4447 // stop if: 4448 // - parameter change required 4449 // - it's disabled 4450 // - whitelist change required but used for scanning 4451 // - resolving list modified 4452 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4453 if ((hci_stack->le_scanning_param_update) || 4454 !hci_stack->le_scanning_enabled || 4455 scanning_uses_whitelist || 4456 resolving_list_modification_pending){ 4457 4458 scanning_stop = true; 4459 } 4460 } 4461 #endif 4462 4463 #ifdef ENABLE_LE_CENTRAL 4464 // connecting control 4465 bool connecting_with_whitelist; 4466 switch (hci_stack->le_connecting_state){ 4467 case LE_CONNECTING_DIRECT: 4468 case LE_CONNECTING_WHITELIST: 4469 // stop connecting if: 4470 // - connecting uses white and whitelist modification pending 4471 // - if it got disabled 4472 // - resolving list modified 4473 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4474 if ((connecting_with_whitelist && whitelist_modification_pending) || 4475 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4476 resolving_list_modification_pending) { 4477 4478 connecting_stop = true; 4479 } 4480 break; 4481 default: 4482 break; 4483 } 4484 #endif 4485 4486 #ifdef ENABLE_LE_PERIPHERAL 4487 // le advertisement control 4488 if (hci_stack->le_advertisements_active){ 4489 // stop if: 4490 // - parameter change required 4491 // - random address used in advertising and changes 4492 // - it's disabled 4493 // - whitelist change required but used for advertisement filter policy 4494 // - resolving list modified 4495 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4496 bool advertising_uses_random_address = hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC; 4497 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4498 if (advertising_change || 4499 (advertising_uses_random_address && random_address_change) || 4500 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4501 (advertising_uses_whitelist && whitelist_modification_pending) || 4502 resolving_list_modification_pending) { 4503 4504 advertising_stop = true; 4505 } 4506 } 4507 #endif 4508 4509 4510 // Phase 2: stop everything that should be off during modifications 4511 4512 #ifdef ENABLE_LE_CENTRAL 4513 if (scanning_stop){ 4514 hci_stack->le_scanning_active = false; 4515 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4516 return true; 4517 } 4518 #endif 4519 4520 #ifdef ENABLE_LE_CENTRAL 4521 if (connecting_stop){ 4522 hci_send_cmd(&hci_le_create_connection_cancel); 4523 return true; 4524 } 4525 #endif 4526 4527 #ifdef ENABLE_LE_PERIPHERAL 4528 if (advertising_stop){ 4529 hci_stack->le_advertisements_active = false; 4530 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4531 return true; 4532 } 4533 #endif 4534 4535 // Phase 3: modify 4536 4537 if (random_address_change){ 4538 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 4539 hci_send_cmd(&hci_le_set_random_address, hci_stack->le_random_address); 4540 return true; 4541 } 4542 4543 #ifdef ENABLE_LE_CENTRAL 4544 if (hci_stack->le_scanning_param_update){ 4545 hci_stack->le_scanning_param_update = false; 4546 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4547 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4548 return true; 4549 } 4550 #endif 4551 4552 #ifdef ENABLE_LE_PERIPHERAL 4553 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4554 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4555 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4556 hci_send_cmd(&hci_le_set_advertising_parameters, 4557 hci_stack->le_advertisements_interval_min, 4558 hci_stack->le_advertisements_interval_max, 4559 hci_stack->le_advertisements_type, 4560 hci_stack->le_advertisements_own_addr_type, 4561 hci_stack->le_advertisements_direct_address_type, 4562 hci_stack->le_advertisements_direct_address, 4563 hci_stack->le_advertisements_channel_map, 4564 hci_stack->le_advertisements_filter_policy); 4565 return true; 4566 } 4567 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4568 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4569 uint8_t adv_data_clean[31]; 4570 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4571 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4572 hci_stack->le_advertisements_data_len); 4573 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4574 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4575 return true; 4576 } 4577 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4578 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4579 uint8_t scan_data_clean[31]; 4580 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4581 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4582 hci_stack->le_scan_response_data_len); 4583 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4584 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4585 return true; 4586 } 4587 #endif 4588 4589 4590 #ifdef ENABLE_LE_CENTRAL 4591 // if connect with whitelist was active and is not cancelled yet, wait until next time 4592 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4593 #endif 4594 4595 // LE Whitelist Management 4596 if (whitelist_modification_pending){ 4597 // add/remove entries 4598 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4599 while (btstack_linked_list_iterator_has_next(&lit)){ 4600 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4601 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4602 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4603 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4604 return true; 4605 } 4606 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4607 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4608 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4609 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4610 return true; 4611 } 4612 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4613 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4614 btstack_memory_whitelist_entry_free(entry); 4615 } 4616 } 4617 } 4618 4619 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4620 // LE Resolving List Management 4621 if (resolving_list_supported) { 4622 uint16_t i; 4623 switch (hci_stack->le_resolving_list_state) { 4624 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4625 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4626 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4627 return true; 4628 case LE_RESOLVING_LIST_READ_SIZE: 4629 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4630 hci_send_cmd(&hci_le_read_resolving_list_size); 4631 return true; 4632 case LE_RESOLVING_LIST_SEND_CLEAR: 4633 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4634 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4635 sizeof(hci_stack->le_resolving_list_add_entries)); 4636 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4637 sizeof(hci_stack->le_resolving_list_remove_entries)); 4638 hci_send_cmd(&hci_le_clear_resolving_list); 4639 return true; 4640 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4641 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4642 uint8_t offset = i >> 3; 4643 uint8_t mask = 1 << (i & 7); 4644 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4645 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4646 bd_addr_t peer_identity_addreses; 4647 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4648 sm_key_t peer_irk; 4649 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4650 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4651 4652 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4653 // trigger whitelist entry 'update' (work around for controller bug) 4654 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4655 while (btstack_linked_list_iterator_has_next(&lit)) { 4656 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4657 if (entry->address_type != peer_identity_addr_type) continue; 4658 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4659 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4660 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4661 } 4662 #endif 4663 4664 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4665 peer_identity_addreses); 4666 return true; 4667 } 4668 4669 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4670 4671 /* fall through */ 4672 4673 case LE_RESOLVING_LIST_ADD_ENTRIES: 4674 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4675 uint8_t offset = i >> 3; 4676 uint8_t mask = 1 << (i & 7); 4677 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4678 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4679 bd_addr_t peer_identity_addreses; 4680 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4681 sm_key_t peer_irk; 4682 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4683 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4684 const uint8_t *local_irk = gap_get_persistent_irk(); 4685 // command uses format specifier 'P' that stores 16-byte value without flip 4686 uint8_t local_irk_flipped[16]; 4687 uint8_t peer_irk_flipped[16]; 4688 reverse_128(local_irk, local_irk_flipped); 4689 reverse_128(peer_irk, peer_irk_flipped); 4690 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4691 peer_irk_flipped, local_irk_flipped); 4692 return true; 4693 } 4694 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4695 break; 4696 4697 default: 4698 break; 4699 } 4700 } 4701 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4702 #endif 4703 4704 // Phase 4: restore state 4705 4706 #ifdef ENABLE_LE_CENTRAL 4707 // re-start scanning 4708 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4709 hci_stack->le_scanning_active = true; 4710 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4711 return true; 4712 } 4713 #endif 4714 4715 #ifdef ENABLE_LE_CENTRAL 4716 // re-start connecting 4717 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4718 bd_addr_t null_addr; 4719 memset(null_addr, 0, 6); 4720 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4721 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4722 hci_send_cmd(&hci_le_create_connection, 4723 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4724 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4725 1, // use whitelist 4726 0, // peer address type 4727 null_addr, // peer bd addr 4728 hci_stack->le_connection_own_addr_type, // our addr type: 4729 hci_stack->le_connection_interval_min, // conn interval min 4730 hci_stack->le_connection_interval_max, // conn interval max 4731 hci_stack->le_connection_latency, // conn latency 4732 hci_stack->le_supervision_timeout, // conn latency 4733 hci_stack->le_minimum_ce_length, // min ce length 4734 hci_stack->le_maximum_ce_length // max ce length 4735 ); 4736 return true; 4737 } 4738 #endif 4739 4740 #ifdef ENABLE_LE_PERIPHERAL 4741 // re-start advertising 4742 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4743 // check if advertisements should be enabled given 4744 hci_stack->le_advertisements_active = true; 4745 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, hci_stack->le_advertisements_own_address); 4746 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4747 return true; 4748 } 4749 #endif 4750 4751 return false; 4752 } 4753 #endif 4754 4755 static bool hci_run_general_pending_commands(void){ 4756 btstack_linked_item_t * it; 4757 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4758 hci_connection_t * connection = (hci_connection_t *) it; 4759 4760 switch(connection->state){ 4761 case SEND_CREATE_CONNECTION: 4762 switch(connection->address_type){ 4763 #ifdef ENABLE_CLASSIC 4764 case BD_ADDR_TYPE_ACL: 4765 log_info("sending hci_create_connection"); 4766 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4767 break; 4768 #endif 4769 default: 4770 #ifdef ENABLE_BLE 4771 #ifdef ENABLE_LE_CENTRAL 4772 log_info("sending hci_le_create_connection"); 4773 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4774 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4775 hci_send_cmd(&hci_le_create_connection, 4776 hci_stack->le_connection_scan_interval, // conn scan interval 4777 hci_stack->le_connection_scan_window, // conn scan windows 4778 0, // don't use whitelist 4779 connection->address_type, // peer address type 4780 connection->address, // peer bd addr 4781 hci_stack->le_connection_own_addr_type, // our addr type: 4782 hci_stack->le_connection_interval_min, // conn interval min 4783 hci_stack->le_connection_interval_max, // conn interval max 4784 hci_stack->le_connection_latency, // conn latency 4785 hci_stack->le_supervision_timeout, // conn latency 4786 hci_stack->le_minimum_ce_length, // min ce length 4787 hci_stack->le_maximum_ce_length // max ce length 4788 ); 4789 connection->state = SENT_CREATE_CONNECTION; 4790 #endif 4791 #endif 4792 break; 4793 } 4794 return true; 4795 4796 #ifdef ENABLE_CLASSIC 4797 case RECEIVED_CONNECTION_REQUEST: 4798 connection->role = HCI_ROLE_SLAVE; 4799 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4800 log_info("sending hci_accept_connection_request"); 4801 connection->state = ACCEPTED_CONNECTION_REQUEST; 4802 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4803 return true; 4804 } 4805 break; 4806 #endif 4807 4808 #ifdef ENABLE_BLE 4809 #ifdef ENABLE_LE_CENTRAL 4810 case SEND_CANCEL_CONNECTION: 4811 connection->state = SENT_CANCEL_CONNECTION; 4812 hci_send_cmd(&hci_le_create_connection_cancel); 4813 return true; 4814 #endif 4815 #endif 4816 case SEND_DISCONNECT: 4817 connection->state = SENT_DISCONNECT; 4818 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4819 return true; 4820 4821 default: 4822 break; 4823 } 4824 4825 // no further commands if connection is about to get shut down 4826 if (connection->state == SENT_DISCONNECT) continue; 4827 4828 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4829 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4830 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4831 return true; 4832 } 4833 4834 #ifdef ENABLE_CLASSIC 4835 4836 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4837 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4838 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4839 return true; 4840 } 4841 4842 // Handling link key request requires remote supported features 4843 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4844 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4845 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4846 4847 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4848 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4849 if (have_link_key && security_level_sufficient){ 4850 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4851 } else { 4852 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4853 } 4854 return true; 4855 } 4856 4857 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4858 log_info("denying to pin request"); 4859 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4860 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4861 return true; 4862 } 4863 4864 // security assessment requires remote features 4865 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4866 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4867 hci_ssp_assess_security_on_io_cap_request(connection); 4868 // 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 4869 } 4870 4871 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4872 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4873 // set authentication requirements: 4874 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4875 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4876 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4877 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4878 authreq |= 1; 4879 } 4880 bool bonding = hci_stack->bondable; 4881 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4882 // if we have received IO Cap Response, we're in responder role 4883 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4884 if (bonding && !remote_bonding){ 4885 log_info("Remote not bonding, dropping local flag"); 4886 bonding = false; 4887 } 4888 } 4889 if (bonding){ 4890 if (connection->bonding_flags & BONDING_DEDICATED){ 4891 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4892 } else { 4893 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4894 } 4895 } 4896 uint8_t have_oob_data = 0; 4897 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4898 if (connection->classic_oob_c_192 != NULL){ 4899 have_oob_data |= 1; 4900 } 4901 if (connection->classic_oob_c_256 != NULL){ 4902 have_oob_data |= 2; 4903 } 4904 #endif 4905 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4906 return true; 4907 } 4908 4909 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4910 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4911 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4912 return true; 4913 } 4914 4915 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4916 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4917 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4918 const uint8_t zero[16] = { 0 }; 4919 const uint8_t * r_192 = zero; 4920 const uint8_t * c_192 = zero; 4921 const uint8_t * r_256 = zero; 4922 const uint8_t * c_256 = zero; 4923 // verify P-256 OOB 4924 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4925 c_256 = connection->classic_oob_c_256; 4926 if (connection->classic_oob_r_256 != NULL) { 4927 r_256 = connection->classic_oob_r_256; 4928 } 4929 } 4930 // verify P-192 OOB 4931 if ((connection->classic_oob_c_192 != NULL)) { 4932 c_192 = connection->classic_oob_c_192; 4933 if (connection->classic_oob_r_192 != NULL) { 4934 r_192 = connection->classic_oob_r_192; 4935 } 4936 } 4937 4938 // assess security 4939 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4940 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4941 if (need_level_4 && !can_reach_level_4){ 4942 log_info("Level 4 required, but not possible -> abort"); 4943 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4944 // send oob negative reply 4945 c_256 = NULL; 4946 c_192 = NULL; 4947 } 4948 4949 // Reply 4950 if (c_256 != zero) { 4951 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4952 } else if (c_192 != zero){ 4953 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4954 } else { 4955 hci_stack->classic_oob_con_handle = connection->con_handle; 4956 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4957 } 4958 return true; 4959 } 4960 #endif 4961 4962 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4963 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4964 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4965 return true; 4966 } 4967 4968 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4969 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4970 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4971 return true; 4972 } 4973 4974 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4975 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4976 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4977 return true; 4978 } 4979 4980 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4981 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4982 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4983 connection->state = SENT_DISCONNECT; 4984 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4985 return true; 4986 } 4987 4988 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4989 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4990 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4991 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4992 return true; 4993 } 4994 4995 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4996 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4997 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4998 return true; 4999 } 5000 5001 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 5002 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 5003 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 5004 return true; 5005 } 5006 5007 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 5008 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5009 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 5010 return true; 5011 } 5012 5013 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 5014 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 5015 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 5016 return true; 5017 } 5018 5019 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 5020 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 5021 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 5022 return true; 5023 } 5024 #endif 5025 5026 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 5027 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 5028 #ifdef ENABLE_CLASSIC 5029 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 5030 #endif 5031 if (connection->state != SENT_DISCONNECT){ 5032 connection->state = SENT_DISCONNECT; 5033 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 5034 return true; 5035 } 5036 } 5037 5038 #ifdef ENABLE_CLASSIC 5039 uint16_t sniff_min_interval; 5040 switch (connection->sniff_min_interval){ 5041 case 0: 5042 break; 5043 case 0xffff: 5044 connection->sniff_min_interval = 0; 5045 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 5046 return true; 5047 default: 5048 sniff_min_interval = connection->sniff_min_interval; 5049 connection->sniff_min_interval = 0; 5050 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 5051 return true; 5052 } 5053 5054 if (connection->sniff_subrating_max_latency != 0xffff){ 5055 uint16_t max_latency = connection->sniff_subrating_max_latency; 5056 connection->sniff_subrating_max_latency = 0; 5057 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 5058 return true; 5059 } 5060 5061 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 5062 uint8_t service_type = (uint8_t) connection->qos_service_type; 5063 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 5064 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); 5065 return true; 5066 } 5067 5068 if (connection->request_role != HCI_ROLE_INVALID){ 5069 hci_role_t role = connection->request_role; 5070 connection->request_role = HCI_ROLE_INVALID; 5071 hci_send_cmd(&hci_switch_role_command, connection->address, role); 5072 return true; 5073 } 5074 #endif 5075 5076 #ifdef ENABLE_BLE 5077 switch (connection->le_con_parameter_update_state){ 5078 // response to L2CAP CON PARAMETER UPDATE REQUEST 5079 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 5080 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5081 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 5082 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5083 0x0000, 0xffff); 5084 return true; 5085 case CON_PARAMETER_UPDATE_REPLY: 5086 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5087 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 5088 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 5089 0x0000, 0xffff); 5090 return true; 5091 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 5092 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 5093 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 5094 return true; 5095 default: 5096 break; 5097 } 5098 if (connection->le_phy_update_all_phys != 0xffu){ 5099 uint8_t all_phys = connection->le_phy_update_all_phys; 5100 connection->le_phy_update_all_phys = 0xff; 5101 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); 5102 return true; 5103 } 5104 #endif 5105 } 5106 return false; 5107 } 5108 5109 static void hci_run(void){ 5110 5111 // stack state sub statemachines 5112 // halting needs to be called even if we cannot send command packet now 5113 switch (hci_stack->state) { 5114 case HCI_STATE_INITIALIZING: 5115 hci_initializing_run(); 5116 break; 5117 case HCI_STATE_HALTING: 5118 hci_halting_run(); 5119 break; 5120 case HCI_STATE_FALLING_ASLEEP: 5121 hci_falling_asleep_run(); 5122 break; 5123 default: 5124 break; 5125 } 5126 5127 bool done; 5128 5129 // send continuation fragments first, as they block the prepared packet buffer 5130 done = hci_run_acl_fragments(); 5131 if (done) return; 5132 5133 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 5134 // send host num completed packets next as they don't require num_cmd_packets > 0 5135 if (!hci_can_send_comand_packet_transport()) return; 5136 if (hci_stack->host_completed_packets){ 5137 hci_host_num_completed_packets(); 5138 return; 5139 } 5140 #endif 5141 5142 if (!hci_can_send_command_packet_now()) return; 5143 5144 // global/non-connection oriented commands 5145 5146 5147 #ifdef ENABLE_CLASSIC 5148 // general gap classic 5149 done = hci_run_general_gap_classic(); 5150 if (done) return; 5151 #endif 5152 5153 #ifdef ENABLE_BLE 5154 // general gap le 5155 done = hci_run_general_gap_le(); 5156 if (done) return; 5157 #endif 5158 5159 // send pending HCI commands 5160 hci_run_general_pending_commands(); 5161 } 5162 5163 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5164 // house-keeping 5165 5166 #ifdef ENABLE_CLASSIC 5167 bd_addr_t addr; 5168 hci_connection_t * conn; 5169 #endif 5170 #ifdef ENABLE_LE_CENTRAL 5171 uint8_t initiator_filter_policy; 5172 #endif 5173 5174 uint16_t opcode = little_endian_read_16(packet, 0); 5175 switch (opcode) { 5176 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5177 hci_stack->loopback_mode = packet[3]; 5178 break; 5179 5180 #ifdef ENABLE_CLASSIC 5181 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5182 reverse_bd_addr(&packet[3], addr); 5183 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5184 5185 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5186 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5187 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5188 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5189 } 5190 5191 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5192 if (!conn) { 5193 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5194 if (!conn) { 5195 // notify client that alloc failed 5196 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5197 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5198 } 5199 conn->state = SEND_CREATE_CONNECTION; 5200 conn->role = HCI_ROLE_MASTER; 5201 } 5202 5203 conn->con_handle = HCI_CON_HANDLE_INVALID; 5204 conn->role = HCI_ROLE_INVALID; 5205 5206 log_info("conn state %u", conn->state); 5207 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5208 switch (conn->state) { 5209 // if connection active exists 5210 case OPEN: 5211 // and OPEN, emit connection complete command 5212 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5213 // packet not sent to controller 5214 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5215 case RECEIVED_DISCONNECTION_COMPLETE: 5216 // create connection triggered in disconnect complete event, let's do it now 5217 break; 5218 case SEND_CREATE_CONNECTION: 5219 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5220 break; 5221 default: 5222 // otherwise, just ignore as it is already in the open process 5223 // packet not sent to controller 5224 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5225 } 5226 conn->state = SENT_CREATE_CONNECTION; 5227 5228 // track outgoing connection 5229 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5230 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5231 break; 5232 5233 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5234 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5235 // setup_synchronous_connection? Voice setting at offset 22 5236 // TODO: compare to current setting if sco connection already active 5237 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5238 break; 5239 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5240 // accept_synchronous_connection? Voice setting at offset 18 5241 // TODO: compare to current setting if sco connection already active 5242 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5243 // track outgoing connection 5244 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_SCO; 5245 reverse_bd_addr(&packet[3], hci_stack->outgoing_addr); 5246 break; 5247 #endif 5248 #endif 5249 5250 #ifdef ENABLE_BLE 5251 #ifdef ENABLE_LE_CENTRAL 5252 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5253 // white list used? 5254 initiator_filter_policy = packet[7]; 5255 switch (initiator_filter_policy) { 5256 case 0: 5257 // whitelist not used 5258 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5259 break; 5260 case 1: 5261 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5262 break; 5263 default: 5264 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5265 break; 5266 } 5267 // track outgoing connection 5268 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5269 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5270 break; 5271 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5272 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5273 break; 5274 #endif 5275 #endif 5276 default: 5277 break; 5278 } 5279 5280 hci_stack->num_cmd_packets--; 5281 5282 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5283 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5284 if (err != 0){ 5285 return ERROR_CODE_HARDWARE_FAILURE; 5286 } 5287 return ERROR_CODE_SUCCESS; 5288 } 5289 5290 // disconnect because of security block 5291 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5292 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5293 if (!connection) return; 5294 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5295 } 5296 5297 5298 // Configure Secure Simple Pairing 5299 5300 #ifdef ENABLE_CLASSIC 5301 5302 // enable will enable SSP during init 5303 void gap_ssp_set_enable(int enable){ 5304 hci_stack->ssp_enable = enable; 5305 } 5306 5307 static int hci_local_ssp_activated(void){ 5308 return gap_ssp_supported() && hci_stack->ssp_enable; 5309 } 5310 5311 // if set, BTstack will respond to io capability request using authentication requirement 5312 void gap_ssp_set_io_capability(int io_capability){ 5313 hci_stack->ssp_io_capability = io_capability; 5314 } 5315 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5316 hci_stack->ssp_authentication_requirement = authentication_requirement; 5317 } 5318 5319 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5320 void gap_ssp_set_auto_accept(int auto_accept){ 5321 hci_stack->ssp_auto_accept = auto_accept; 5322 } 5323 5324 void gap_secure_connections_enable(bool enable){ 5325 hci_stack->secure_connections_enable = enable; 5326 } 5327 5328 #endif 5329 5330 // va_list part of hci_send_cmd 5331 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5332 if (!hci_can_send_command_packet_now()){ 5333 log_error("hci_send_cmd called but cannot send packet now"); 5334 return ERROR_CODE_COMMAND_DISALLOWED; 5335 } 5336 5337 // for HCI INITIALIZATION 5338 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5339 hci_stack->last_cmd_opcode = cmd->opcode; 5340 5341 hci_reserve_packet_buffer(); 5342 uint8_t * packet = hci_stack->hci_packet_buffer; 5343 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5344 uint8_t status = hci_send_cmd_packet(packet, size); 5345 5346 // release packet buffer on error or for synchronous transport implementations 5347 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5348 hci_release_packet_buffer(); 5349 hci_emit_transport_packet_sent(); 5350 } 5351 5352 return status; 5353 } 5354 5355 /** 5356 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5357 */ 5358 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5359 va_list argptr; 5360 va_start(argptr, cmd); 5361 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5362 va_end(argptr); 5363 return status; 5364 } 5365 5366 // Create various non-HCI events. 5367 // TODO: generalize, use table similar to hci_create_command 5368 5369 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5370 // dump packet 5371 if (dump) { 5372 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5373 } 5374 5375 // dispatch to all event handlers 5376 btstack_linked_list_iterator_t it; 5377 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5378 while (btstack_linked_list_iterator_has_next(&it)){ 5379 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5380 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5381 } 5382 } 5383 5384 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5385 if (!hci_stack->acl_packet_handler) return; 5386 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5387 } 5388 5389 #ifdef ENABLE_CLASSIC 5390 static void hci_notify_if_sco_can_send_now(void){ 5391 // notify SCO sender if waiting 5392 if (!hci_stack->sco_waiting_for_can_send_now) return; 5393 if (hci_can_send_sco_packet_now()){ 5394 hci_stack->sco_waiting_for_can_send_now = 0; 5395 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5396 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5397 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5398 } 5399 } 5400 5401 // parsing end emitting has been merged to reduce code size 5402 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5403 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5404 5405 uint8_t * eir_data; 5406 ad_context_t context; 5407 const uint8_t * name; 5408 uint8_t name_len; 5409 5410 if (size < 3) return; 5411 5412 int event_type = hci_event_packet_get_type(packet); 5413 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5414 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5415 5416 switch (event_type){ 5417 case HCI_EVENT_INQUIRY_RESULT: 5418 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5419 if (size != (3 + (num_responses * 14))) return; 5420 break; 5421 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5422 if (size != 257) return; 5423 if (num_responses != 1) return; 5424 break; 5425 default: 5426 return; 5427 } 5428 5429 // event[1] is set at the end 5430 int i; 5431 for (i=0; i<num_responses;i++){ 5432 memset(event, 0, sizeof(event)); 5433 event[0] = GAP_EVENT_INQUIRY_RESULT; 5434 uint8_t event_size = 27; // if name is not set by EIR 5435 5436 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5437 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5438 (void)memcpy(&event[9], 5439 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5440 3); // class of device 5441 (void)memcpy(&event[12], 5442 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5443 2); // clock offset 5444 5445 switch (event_type){ 5446 case HCI_EVENT_INQUIRY_RESULT: 5447 // 14,15,16,17 = 0, size 18 5448 break; 5449 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5450 event[14] = 1; 5451 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5452 // 16,17 = 0, size 18 5453 break; 5454 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5455 event[14] = 1; 5456 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5457 // EIR packets only contain a single inquiry response 5458 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5459 name = NULL; 5460 // Iterate over EIR data 5461 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5462 uint8_t data_type = ad_iterator_get_data_type(&context); 5463 uint8_t data_size = ad_iterator_get_data_len(&context); 5464 const uint8_t * data = ad_iterator_get_data(&context); 5465 // Prefer Complete Local Name over Shortened Local Name 5466 switch (data_type){ 5467 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5468 if (name) continue; 5469 /* fall through */ 5470 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5471 name = data; 5472 name_len = data_size; 5473 break; 5474 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5475 if (data_size != 8) break; 5476 event[16] = 1; 5477 memcpy(&event[17], data, 8); 5478 break; 5479 default: 5480 break; 5481 } 5482 } 5483 if (name){ 5484 event[25] = 1; 5485 // truncate name if needed 5486 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5487 event[26] = len; 5488 (void)memcpy(&event[27], name, len); 5489 event_size += len; 5490 } 5491 break; 5492 default: 5493 return; 5494 } 5495 event[1] = event_size - 2; 5496 hci_emit_event(event, event_size, 1); 5497 } 5498 } 5499 #endif 5500 5501 void hci_emit_state(void){ 5502 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5503 uint8_t event[3]; 5504 event[0] = BTSTACK_EVENT_STATE; 5505 event[1] = sizeof(event) - 2u; 5506 event[2] = hci_stack->state; 5507 hci_emit_event(event, sizeof(event), 1); 5508 } 5509 5510 #ifdef ENABLE_CLASSIC 5511 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5512 uint8_t event[13]; 5513 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5514 event[1] = sizeof(event) - 2; 5515 event[2] = status; 5516 little_endian_store_16(event, 3, con_handle); 5517 reverse_bd_addr(address, &event[5]); 5518 event[11] = 1; // ACL connection 5519 event[12] = 0; // encryption disabled 5520 hci_emit_event(event, sizeof(event), 1); 5521 } 5522 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5523 if (disable_l2cap_timeouts) return; 5524 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5525 uint8_t event[4]; 5526 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5527 event[1] = sizeof(event) - 2; 5528 little_endian_store_16(event, 2, conn->con_handle); 5529 hci_emit_event(event, sizeof(event), 1); 5530 } 5531 #endif 5532 5533 #ifdef ENABLE_BLE 5534 #ifdef ENABLE_LE_CENTRAL 5535 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){ 5536 uint8_t event[21]; 5537 event[0] = HCI_EVENT_LE_META; 5538 event[1] = sizeof(event) - 2u; 5539 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5540 event[3] = status; 5541 little_endian_store_16(event, 4, con_handle); 5542 event[6] = 0; // TODO: role 5543 event[7] = address_type; 5544 reverse_bd_addr(address, &event[8]); 5545 little_endian_store_16(event, 14, 0); // interval 5546 little_endian_store_16(event, 16, 0); // latency 5547 little_endian_store_16(event, 18, 0); // supervision timeout 5548 event[20] = 0; // master clock accuracy 5549 hci_emit_event(event, sizeof(event), 1); 5550 } 5551 #endif 5552 #endif 5553 5554 static void hci_emit_transport_packet_sent(void){ 5555 // notify upper stack that it might be possible to send again 5556 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5557 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5558 } 5559 5560 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5561 uint8_t event[6]; 5562 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5563 event[1] = sizeof(event) - 2u; 5564 event[2] = 0; // status = OK 5565 little_endian_store_16(event, 3, con_handle); 5566 event[5] = reason; 5567 hci_emit_event(event, sizeof(event), 1); 5568 } 5569 5570 static void hci_emit_nr_connections_changed(void){ 5571 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5572 uint8_t event[3]; 5573 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5574 event[1] = sizeof(event) - 2u; 5575 event[2] = nr_hci_connections(); 5576 hci_emit_event(event, sizeof(event), 1); 5577 } 5578 5579 static void hci_emit_hci_open_failed(void){ 5580 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5581 uint8_t event[2]; 5582 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5583 event[1] = sizeof(event) - 2u; 5584 hci_emit_event(event, sizeof(event), 1); 5585 } 5586 5587 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5588 log_info("hci_emit_dedicated_bonding_result %u ", status); 5589 uint8_t event[9]; 5590 int pos = 0; 5591 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5592 event[pos++] = sizeof(event) - 2u; 5593 event[pos++] = status; 5594 reverse_bd_addr(address, &event[pos]); 5595 hci_emit_event(event, sizeof(event), 1); 5596 } 5597 5598 5599 #ifdef ENABLE_CLASSIC 5600 5601 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5602 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5603 uint8_t event[5]; 5604 int pos = 0; 5605 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5606 event[pos++] = sizeof(event) - 2; 5607 little_endian_store_16(event, 2, con_handle); 5608 pos += 2; 5609 event[pos++] = level; 5610 hci_emit_event(event, sizeof(event), 1); 5611 } 5612 5613 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5614 if (!connection) return LEVEL_0; 5615 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5616 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5617 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5618 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5619 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5620 // LEVEL 4 always requires 128 bit encrytion key size 5621 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5622 security_level = LEVEL_3; 5623 } 5624 return security_level; 5625 } 5626 5627 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5628 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5629 uint8_t event[3]; 5630 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5631 event[1] = sizeof(event) - 2; 5632 event[2] = enabled; 5633 hci_emit_event(event, sizeof(event), 1); 5634 } 5635 5636 // query if remote side supports eSCO 5637 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5638 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5639 if (!connection) return false; 5640 return (connection->remote_supported_features[0] & 1) != 0; 5641 } 5642 5643 static bool hci_ssp_supported(hci_connection_t * connection){ 5644 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5645 return (connection->bonding_flags & mask) == mask; 5646 } 5647 5648 // query if remote side supports SSP 5649 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5650 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5651 if (!connection) return false; 5652 return hci_ssp_supported(connection) ? 1 : 0; 5653 } 5654 5655 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5656 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5657 } 5658 5659 /** 5660 * Check if remote supported features query has completed 5661 */ 5662 bool hci_remote_features_available(hci_con_handle_t handle){ 5663 hci_connection_t * connection = hci_connection_for_handle(handle); 5664 if (!connection) return false; 5665 return (connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0; 5666 } 5667 5668 /** 5669 * Trigger remote supported features query 5670 */ 5671 5672 static void hci_trigger_remote_features_for_connection(hci_connection_t * connection){ 5673 if ((connection->bonding_flags & (BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_RECEIVED_REMOTE_FEATURES)) == 0){ 5674 connection->bonding_flags |= BONDING_REMOTE_FEATURES_QUERY_ACTIVE | BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 5675 } 5676 } 5677 5678 void hci_remote_features_query(hci_con_handle_t con_handle){ 5679 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5680 if (!connection) return; 5681 hci_trigger_remote_features_for_connection(connection); 5682 hci_run(); 5683 } 5684 5685 // GAP API 5686 /** 5687 * @bbrief enable/disable bonding. default is enabled 5688 * @praram enabled 5689 */ 5690 void gap_set_bondable_mode(int enable){ 5691 hci_stack->bondable = enable ? 1 : 0; 5692 } 5693 /** 5694 * @brief Get bondable mode. 5695 * @return 1 if bondable 5696 */ 5697 int gap_get_bondable_mode(void){ 5698 return hci_stack->bondable; 5699 } 5700 5701 /** 5702 * @brief map link keys to security levels 5703 */ 5704 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5705 switch (link_key_type){ 5706 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5707 return LEVEL_4; 5708 case COMBINATION_KEY: 5709 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5710 return LEVEL_3; 5711 default: 5712 return LEVEL_2; 5713 } 5714 } 5715 5716 /** 5717 * @brief map link keys to secure connection yes/no 5718 */ 5719 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5720 switch (link_key_type){ 5721 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5722 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5723 return 1; 5724 default: 5725 return 0; 5726 } 5727 } 5728 5729 /** 5730 * @brief map link keys to authenticated 5731 */ 5732 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5733 switch (link_key_type){ 5734 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5735 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5736 return 1; 5737 default: 5738 return 0; 5739 } 5740 } 5741 5742 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5743 log_info("gap_mitm_protection_required_for_security_level %u", level); 5744 return level > LEVEL_2; 5745 } 5746 5747 /** 5748 * @brief get current security level 5749 */ 5750 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5751 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5752 if (!connection) return LEVEL_0; 5753 return gap_security_level_for_connection(connection); 5754 } 5755 5756 /** 5757 * @brief request connection to device to 5758 * @result GAP_AUTHENTICATION_RESULT 5759 */ 5760 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5761 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5762 if (!connection){ 5763 hci_emit_security_level(con_handle, LEVEL_0); 5764 return; 5765 } 5766 5767 btstack_assert(hci_is_le_connection(connection) == false); 5768 5769 // 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) 5770 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5771 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5772 requested_level = LEVEL_4; 5773 } 5774 5775 gap_security_level_t current_level = gap_security_level(con_handle); 5776 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5777 requested_level, connection->requested_security_level, current_level); 5778 5779 // authentication active if authentication request was sent or planned level > 0 5780 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5781 if (authentication_active){ 5782 // authentication already active 5783 if (connection->requested_security_level < requested_level){ 5784 // increase requested level as new level is higher 5785 // TODO: handle re-authentication when done 5786 connection->requested_security_level = requested_level; 5787 } 5788 } else { 5789 // no request active, notify if security sufficient 5790 if (requested_level <= current_level){ 5791 hci_emit_security_level(con_handle, current_level); 5792 return; 5793 } 5794 5795 // store request 5796 connection->requested_security_level = requested_level; 5797 5798 // request remote features if not already active 5799 hci_remote_features_query(con_handle); 5800 5801 // start to authenticate connection 5802 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5803 hci_run(); 5804 } 5805 } 5806 5807 /** 5808 * @brief start dedicated bonding with device. disconnect after bonding 5809 * @param device 5810 * @param request MITM protection 5811 * @result GAP_DEDICATED_BONDING_COMPLETE 5812 */ 5813 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5814 5815 // create connection state machine 5816 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5817 5818 if (!connection){ 5819 return BTSTACK_MEMORY_ALLOC_FAILED; 5820 } 5821 5822 // delete linkn key 5823 gap_drop_link_key_for_bd_addr(device); 5824 5825 // configure LEVEL_2/3, dedicated bonding 5826 connection->state = SEND_CREATE_CONNECTION; 5827 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5828 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5829 connection->bonding_flags = BONDING_DEDICATED; 5830 5831 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5832 5833 // handle: connnection failure (connection complete != ok) 5834 // handle: authentication failure 5835 // handle: disconnect on done 5836 5837 hci_run(); 5838 5839 return 0; 5840 } 5841 5842 void gap_set_local_name(const char * local_name){ 5843 hci_stack->local_name = local_name; 5844 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5845 // also update EIR if not set by user 5846 if (hci_stack->eir_data == NULL){ 5847 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5848 } 5849 hci_run(); 5850 } 5851 #endif 5852 5853 5854 #ifdef ENABLE_BLE 5855 5856 #ifdef ENABLE_LE_CENTRAL 5857 void gap_start_scan(void){ 5858 hci_stack->le_scanning_enabled = true; 5859 hci_run(); 5860 } 5861 5862 void gap_stop_scan(void){ 5863 hci_stack->le_scanning_enabled = false; 5864 hci_run(); 5865 } 5866 5867 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5868 hci_stack->le_scan_type = scan_type; 5869 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5870 hci_stack->le_scan_interval = scan_interval; 5871 hci_stack->le_scan_window = scan_window; 5872 hci_stack->le_scanning_param_update = true; 5873 hci_run(); 5874 } 5875 5876 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5877 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5878 } 5879 5880 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5881 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5882 if (!conn){ 5883 // disallow if le connection is already outgoing 5884 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5885 log_error("le connection already active"); 5886 return ERROR_CODE_COMMAND_DISALLOWED; 5887 } 5888 5889 log_info("gap_connect: no connection exists yet, creating context"); 5890 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5891 if (!conn){ 5892 // notify client that alloc failed 5893 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5894 log_info("gap_connect: failed to alloc hci_connection_t"); 5895 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5896 } 5897 5898 // set le connecting state 5899 if (hci_is_le_connection_type(addr_type)){ 5900 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5901 } 5902 5903 conn->state = SEND_CREATE_CONNECTION; 5904 log_info("gap_connect: send create connection next"); 5905 hci_run(); 5906 return ERROR_CODE_SUCCESS; 5907 } 5908 5909 if (!hci_is_le_connection(conn) || 5910 (conn->state == SEND_CREATE_CONNECTION) || 5911 (conn->state == SENT_CREATE_CONNECTION)) { 5912 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5913 log_error("gap_connect: classic connection or connect is already being created"); 5914 return GATT_CLIENT_IN_WRONG_STATE; 5915 } 5916 5917 // check if connection was just disconnected 5918 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5919 log_info("gap_connect: send create connection (again)"); 5920 conn->state = SEND_CREATE_CONNECTION; 5921 hci_run(); 5922 return ERROR_CODE_SUCCESS; 5923 } 5924 5925 log_info("gap_connect: context exists with state %u", conn->state); 5926 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5927 hci_run(); 5928 return ERROR_CODE_SUCCESS; 5929 } 5930 5931 // @assumption: only a single outgoing LE Connection exists 5932 static hci_connection_t * gap_get_outgoing_connection(void){ 5933 btstack_linked_item_t *it; 5934 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5935 hci_connection_t * conn = (hci_connection_t *) it; 5936 if (!hci_is_le_connection(conn)) continue; 5937 switch (conn->state){ 5938 case SEND_CREATE_CONNECTION: 5939 case SENT_CREATE_CONNECTION: 5940 case SENT_CANCEL_CONNECTION: 5941 return conn; 5942 default: 5943 break; 5944 }; 5945 } 5946 return NULL; 5947 } 5948 5949 uint8_t gap_connect_cancel(void){ 5950 hci_connection_t * conn = gap_get_outgoing_connection(); 5951 if (!conn) return 0; 5952 switch (conn->state){ 5953 case SEND_CREATE_CONNECTION: 5954 // skip sending create connection and emit event instead 5955 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5956 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5957 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5958 btstack_memory_hci_connection_free( conn ); 5959 break; 5960 case SENT_CREATE_CONNECTION: 5961 // request to send cancel connection 5962 conn->state = SEND_CANCEL_CONNECTION; 5963 hci_run(); 5964 break; 5965 default: 5966 break; 5967 } 5968 return 0; 5969 } 5970 #endif 5971 5972 #ifdef ENABLE_LE_CENTRAL 5973 /** 5974 * @brief Set connection parameters for outgoing connections 5975 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5976 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5977 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5978 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5979 * @param conn_latency, default: 4 5980 * @param supervision_timeout (unit: 10ms), default: 720 ms 5981 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5982 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5983 */ 5984 5985 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5986 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5987 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5988 hci_stack->le_connection_scan_interval = conn_scan_interval; 5989 hci_stack->le_connection_scan_window = conn_scan_window; 5990 hci_stack->le_connection_interval_min = conn_interval_min; 5991 hci_stack->le_connection_interval_max = conn_interval_max; 5992 hci_stack->le_connection_latency = conn_latency; 5993 hci_stack->le_supervision_timeout = supervision_timeout; 5994 hci_stack->le_minimum_ce_length = min_ce_length; 5995 hci_stack->le_maximum_ce_length = max_ce_length; 5996 } 5997 #endif 5998 5999 /** 6000 * @brief Updates the connection parameters for a given LE connection 6001 * @param handle 6002 * @param conn_interval_min (unit: 1.25ms) 6003 * @param conn_interval_max (unit: 1.25ms) 6004 * @param conn_latency 6005 * @param supervision_timeout (unit: 10ms) 6006 * @return 0 if ok 6007 */ 6008 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6009 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6010 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6011 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6012 connection->le_conn_interval_min = conn_interval_min; 6013 connection->le_conn_interval_max = conn_interval_max; 6014 connection->le_conn_latency = conn_latency; 6015 connection->le_supervision_timeout = supervision_timeout; 6016 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 6017 hci_run(); 6018 return 0; 6019 } 6020 6021 /** 6022 * @brief Request an update of the connection parameter for a given LE connection 6023 * @param handle 6024 * @param conn_interval_min (unit: 1.25ms) 6025 * @param conn_interval_max (unit: 1.25ms) 6026 * @param conn_latency 6027 * @param supervision_timeout (unit: 10ms) 6028 * @return 0 if ok 6029 */ 6030 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 6031 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 6032 hci_connection_t * connection = hci_connection_for_handle(con_handle); 6033 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6034 connection->le_conn_interval_min = conn_interval_min; 6035 connection->le_conn_interval_max = conn_interval_max; 6036 connection->le_conn_latency = conn_latency; 6037 connection->le_supervision_timeout = supervision_timeout; 6038 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 6039 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 6040 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 6041 return 0; 6042 } 6043 6044 #ifdef ENABLE_LE_PERIPHERAL 6045 6046 /** 6047 * @brief Set Advertisement Data 6048 * @param advertising_data_length 6049 * @param advertising_data (max 31 octets) 6050 * @note data is not copied, pointer has to stay valid 6051 */ 6052 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 6053 hci_stack->le_advertisements_data_len = advertising_data_length; 6054 hci_stack->le_advertisements_data = advertising_data; 6055 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6056 hci_run(); 6057 } 6058 6059 /** 6060 * @brief Set Scan Response Data 6061 * @param advertising_data_length 6062 * @param advertising_data (max 31 octets) 6063 * @note data is not copied, pointer has to stay valid 6064 */ 6065 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6066 hci_stack->le_scan_response_data_len = scan_response_data_length; 6067 hci_stack->le_scan_response_data = scan_response_data; 6068 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6069 hci_run(); 6070 } 6071 6072 /** 6073 * @brief Set Advertisement Parameters 6074 * @param adv_int_min 6075 * @param adv_int_max 6076 * @param adv_type 6077 * @param direct_address_type 6078 * @param direct_address 6079 * @param channel_map 6080 * @param filter_policy 6081 * 6082 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6083 */ 6084 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6085 uint8_t direct_address_typ, bd_addr_t direct_address, 6086 uint8_t channel_map, uint8_t filter_policy) { 6087 6088 hci_stack->le_advertisements_interval_min = adv_int_min; 6089 hci_stack->le_advertisements_interval_max = adv_int_max; 6090 hci_stack->le_advertisements_type = adv_type; 6091 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6092 hci_stack->le_advertisements_channel_map = channel_map; 6093 hci_stack->le_advertisements_filter_policy = filter_policy; 6094 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6095 6); 6096 6097 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6098 hci_run(); 6099 } 6100 6101 /** 6102 * @brief Enable/Disable Advertisements 6103 * @param enabled 6104 */ 6105 void gap_advertisements_enable(int enabled){ 6106 hci_stack->le_advertisements_enabled = enabled != 0; 6107 hci_update_advertisements_enabled_for_current_roles(); 6108 hci_run(); 6109 } 6110 6111 #endif 6112 6113 void hci_le_set_own_address_type(uint8_t own_address_type){ 6114 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6115 if (own_address_type == hci_stack->le_own_addr_type) return; 6116 hci_stack->le_own_addr_type = own_address_type; 6117 6118 #ifdef ENABLE_LE_PERIPHERAL 6119 // update advertisement parameters, too 6120 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6121 hci_run(); 6122 #endif 6123 #ifdef ENABLE_LE_CENTRAL 6124 // note: we don't update scan parameters or modify ongoing connection attempts 6125 #endif 6126 } 6127 6128 void hci_le_random_address_set(const bd_addr_t random_address){ 6129 memcpy(hci_stack->le_random_address, random_address, 6); 6130 hci_stack->le_random_address_set = true; 6131 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADDRESS; 6132 hci_run(); 6133 } 6134 6135 #endif 6136 6137 uint8_t gap_disconnect(hci_con_handle_t handle){ 6138 hci_connection_t * conn = hci_connection_for_handle(handle); 6139 if (!conn){ 6140 hci_emit_disconnection_complete(handle, 0); 6141 return 0; 6142 } 6143 // ignore if already disconnected 6144 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6145 return 0; 6146 } 6147 conn->state = SEND_DISCONNECT; 6148 hci_run(); 6149 return 0; 6150 } 6151 6152 int gap_read_rssi(hci_con_handle_t con_handle){ 6153 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6154 if (hci_connection == NULL) return 0; 6155 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6156 hci_run(); 6157 return 1; 6158 } 6159 6160 /** 6161 * @brief Get connection type 6162 * @param con_handle 6163 * @result connection_type 6164 */ 6165 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6166 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6167 if (!conn) return GAP_CONNECTION_INVALID; 6168 switch (conn->address_type){ 6169 case BD_ADDR_TYPE_LE_PUBLIC: 6170 case BD_ADDR_TYPE_LE_RANDOM: 6171 return GAP_CONNECTION_LE; 6172 case BD_ADDR_TYPE_SCO: 6173 return GAP_CONNECTION_SCO; 6174 case BD_ADDR_TYPE_ACL: 6175 return GAP_CONNECTION_ACL; 6176 default: 6177 return GAP_CONNECTION_INVALID; 6178 } 6179 } 6180 6181 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6182 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6183 if (!conn) return HCI_ROLE_INVALID; 6184 return (hci_role_t) conn->role; 6185 } 6186 6187 6188 #ifdef ENABLE_CLASSIC 6189 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6190 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6191 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6192 conn->request_role = role; 6193 hci_run(); 6194 return ERROR_CODE_SUCCESS; 6195 } 6196 #endif 6197 6198 #ifdef ENABLE_BLE 6199 6200 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){ 6201 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6202 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6203 6204 conn->le_phy_update_all_phys = all_phys; 6205 conn->le_phy_update_tx_phys = tx_phys; 6206 conn->le_phy_update_rx_phys = rx_phys; 6207 conn->le_phy_update_phy_options = phy_options; 6208 6209 hci_run(); 6210 6211 return 0; 6212 } 6213 6214 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6215 // check if already in list 6216 btstack_linked_list_iterator_t it; 6217 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6218 while (btstack_linked_list_iterator_has_next(&it)) { 6219 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6220 if (entry->address_type != address_type) { 6221 continue; 6222 } 6223 if (memcmp(entry->address, address, 6) != 0) { 6224 continue; 6225 } 6226 // disallow if already scheduled to add 6227 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6228 return ERROR_CODE_COMMAND_DISALLOWED; 6229 } 6230 // still on controller, but scheduled to remove -> re-add 6231 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6232 return ERROR_CODE_SUCCESS; 6233 } 6234 // alloc and add to list 6235 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6236 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6237 entry->address_type = address_type; 6238 (void)memcpy(entry->address, address, 6); 6239 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6240 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6241 return ERROR_CODE_SUCCESS; 6242 } 6243 6244 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6245 btstack_linked_list_iterator_t it; 6246 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6247 while (btstack_linked_list_iterator_has_next(&it)){ 6248 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6249 if (entry->address_type != address_type) { 6250 continue; 6251 } 6252 if (memcmp(entry->address, address, 6) != 0) { 6253 continue; 6254 } 6255 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6256 // remove from controller if already present 6257 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6258 } else { 6259 // directly remove entry from whitelist 6260 btstack_linked_list_iterator_remove(&it); 6261 btstack_memory_whitelist_entry_free(entry); 6262 } 6263 return ERROR_CODE_SUCCESS; 6264 } 6265 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6266 } 6267 6268 static void hci_whitelist_clear(void){ 6269 btstack_linked_list_iterator_t it; 6270 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6271 while (btstack_linked_list_iterator_has_next(&it)){ 6272 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6273 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6274 // remove from controller if already present 6275 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6276 continue; 6277 } 6278 // directly remove entry from whitelist 6279 btstack_linked_list_iterator_remove(&it); 6280 btstack_memory_whitelist_entry_free(entry); 6281 } 6282 } 6283 6284 // free all entries unconditionally 6285 static void hci_whitelist_free(void){ 6286 btstack_linked_list_iterator_t lit; 6287 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 6288 while (btstack_linked_list_iterator_has_next(&lit)){ 6289 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 6290 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 6291 btstack_memory_whitelist_entry_free(entry); 6292 } 6293 } 6294 6295 /** 6296 * @brief Clear Whitelist 6297 * @return 0 if ok 6298 */ 6299 uint8_t gap_whitelist_clear(void){ 6300 hci_whitelist_clear(); 6301 hci_run(); 6302 return ERROR_CODE_SUCCESS; 6303 } 6304 6305 /** 6306 * @brief Add Device to Whitelist 6307 * @param address_typ 6308 * @param address 6309 * @return 0 if ok 6310 */ 6311 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6312 uint8_t status = hci_whitelist_add(address_type, address); 6313 if (status){ 6314 return status; 6315 } 6316 hci_run(); 6317 return ERROR_CODE_SUCCESS; 6318 } 6319 6320 /** 6321 * @brief Remove Device from Whitelist 6322 * @param address_typ 6323 * @param address 6324 * @return 0 if ok 6325 */ 6326 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6327 uint8_t status = hci_whitelist_remove(address_type, address); 6328 if (status){ 6329 return status; 6330 } 6331 hci_run(); 6332 return ERROR_CODE_SUCCESS; 6333 } 6334 6335 #ifdef ENABLE_LE_CENTRAL 6336 /** 6337 * @brief Connect with Whitelist 6338 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6339 * @return - if ok 6340 */ 6341 uint8_t gap_connect_with_whitelist(void){ 6342 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6343 return ERROR_CODE_COMMAND_DISALLOWED; 6344 } 6345 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6346 hci_run(); 6347 return ERROR_CODE_SUCCESS; 6348 } 6349 6350 /** 6351 * @brief Auto Connection Establishment - Start Connecting to device 6352 * @param address_typ 6353 * @param address 6354 * @return 0 if ok 6355 */ 6356 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6357 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6358 return ERROR_CODE_COMMAND_DISALLOWED; 6359 } 6360 6361 uint8_t status = hci_whitelist_add(address_type, address); 6362 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6363 return status; 6364 } 6365 6366 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6367 6368 hci_run(); 6369 return ERROR_CODE_SUCCESS; 6370 } 6371 6372 /** 6373 * @brief Auto Connection Establishment - Stop Connecting to device 6374 * @param address_typ 6375 * @param address 6376 * @return 0 if ok 6377 */ 6378 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6379 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6380 return ERROR_CODE_COMMAND_DISALLOWED; 6381 } 6382 6383 hci_whitelist_remove(address_type, address); 6384 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6385 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6386 } 6387 hci_run(); 6388 return 0; 6389 } 6390 6391 /** 6392 * @brief Auto Connection Establishment - Stop everything 6393 * @note Convenience function to stop all active auto connection attempts 6394 */ 6395 uint8_t gap_auto_connection_stop_all(void){ 6396 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6397 return ERROR_CODE_COMMAND_DISALLOWED; 6398 } 6399 hci_whitelist_clear(); 6400 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6401 hci_run(); 6402 return ERROR_CODE_SUCCESS; 6403 } 6404 6405 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6406 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6407 if (!conn) return 0; 6408 return conn->le_connection_interval; 6409 } 6410 #endif 6411 #endif 6412 6413 #ifdef ENABLE_CLASSIC 6414 /** 6415 * @brief Set Extended Inquiry Response data 6416 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6417 * @note has to be done before stack starts up 6418 */ 6419 void gap_set_extended_inquiry_response(const uint8_t * data){ 6420 hci_stack->eir_data = data; 6421 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6422 hci_run(); 6423 } 6424 6425 /** 6426 * @brief Start GAP Classic Inquiry 6427 * @param duration in 1.28s units 6428 * @return 0 if ok 6429 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6430 */ 6431 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6432 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6433 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6434 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6435 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6436 } 6437 hci_stack->inquiry_state = duration_in_1280ms_units; 6438 hci_run(); 6439 return 0; 6440 } 6441 6442 /** 6443 * @brief Stop GAP Classic Inquiry 6444 * @return 0 if ok 6445 */ 6446 int gap_inquiry_stop(void){ 6447 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6448 // emit inquiry complete event, before it even started 6449 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6450 hci_emit_event(event, sizeof(event), 1); 6451 return 0; 6452 } 6453 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6454 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6455 hci_run(); 6456 return 0; 6457 } 6458 6459 void gap_inquiry_set_lap(uint32_t lap){ 6460 hci_stack->inquiry_lap = lap; 6461 } 6462 6463 void gap_inquiry_set_scan_activity(uint16_t inquiry_scan_interval, uint16_t inquiry_scan_window){ 6464 hci_stack->inquiry_scan_interval = inquiry_scan_interval; 6465 hci_stack->inquiry_scan_window = inquiry_scan_window; 6466 hci_stack->gap_tasks |= GAP_TASK_WRITE_INQUIRY_SCAN_ACTIVITY; 6467 hci_run(); 6468 } 6469 6470 6471 /** 6472 * @brief Remote Name Request 6473 * @param addr 6474 * @param page_scan_repetition_mode 6475 * @param clock_offset only used when bit 15 is set 6476 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6477 */ 6478 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6479 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6480 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6481 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6482 hci_stack->remote_name_clock_offset = clock_offset; 6483 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6484 hci_run(); 6485 return 0; 6486 } 6487 6488 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6489 hci_stack->gap_pairing_state = state; 6490 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6491 hci_run(); 6492 return 0; 6493 } 6494 6495 /** 6496 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6497 * @param addr 6498 * @param pin_data 6499 * @param pin_len 6500 * @return 0 if ok 6501 */ 6502 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6503 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6504 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6505 hci_stack->gap_pairing_pin_len = pin_len; 6506 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6507 } 6508 6509 /** 6510 * @brief Legacy Pairing Pin Code Response 6511 * @param addr 6512 * @param pin 6513 * @return 0 if ok 6514 */ 6515 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6516 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6517 } 6518 6519 /** 6520 * @brief Abort Legacy Pairing 6521 * @param addr 6522 * @param pin 6523 * @return 0 if ok 6524 */ 6525 int gap_pin_code_negative(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_PIN_NEGATIVE); 6528 } 6529 6530 /** 6531 * @brief SSP Passkey Response 6532 * @param addr 6533 * @param passkey 6534 * @return 0 if ok 6535 */ 6536 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6537 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6538 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6539 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6540 } 6541 6542 /** 6543 * @brief Abort SSP Passkey Entry/Pairing 6544 * @param addr 6545 * @param pin 6546 * @return 0 if ok 6547 */ 6548 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6549 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6550 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6551 } 6552 6553 /** 6554 * @brief Accept SSP Numeric Comparison 6555 * @param addr 6556 * @param passkey 6557 * @return 0 if ok 6558 */ 6559 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6560 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6561 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6562 } 6563 6564 /** 6565 * @brief Abort SSP Numeric Comparison/Pairing 6566 * @param addr 6567 * @param pin 6568 * @return 0 if ok 6569 */ 6570 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6571 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6572 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6573 } 6574 6575 #if defined(ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY) || defined(ENABLE_EXPLICIT_LINK_KEY_REPLY) 6576 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6577 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6578 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6579 connectionSetAuthenticationFlags(conn, flag); 6580 hci_run(); 6581 return ERROR_CODE_SUCCESS; 6582 } 6583 #endif 6584 6585 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6586 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6587 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6588 } 6589 6590 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6591 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6592 } 6593 #endif 6594 6595 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6596 /** 6597 * @brief Report Remote OOB Data 6598 * @param bd_addr 6599 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6600 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6601 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6602 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6603 */ 6604 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){ 6605 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6606 if (connection == NULL) { 6607 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6608 } 6609 connection->classic_oob_c_192 = c_192; 6610 connection->classic_oob_r_192 = r_192; 6611 6612 // ignore P-256 if not supported by us 6613 if (hci_stack->secure_connections_active){ 6614 connection->classic_oob_c_256 = c_256; 6615 connection->classic_oob_r_256 = r_256; 6616 } 6617 6618 return ERROR_CODE_SUCCESS; 6619 } 6620 /** 6621 * @brief Generate new OOB data 6622 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6623 */ 6624 void gap_ssp_generate_oob_data(void){ 6625 hci_stack->classic_read_local_oob_data = true; 6626 hci_run(); 6627 } 6628 6629 #endif 6630 6631 #ifdef ENABLE_EXPLICIT_LINK_KEY_REPLY 6632 uint8_t gap_send_link_key_response(const bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 6633 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6634 if (connection == NULL) { 6635 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6636 } 6637 6638 memcpy(connection->link_key, link_key, sizeof(link_key_t)); 6639 connection->link_key_type = type; 6640 6641 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 6642 } 6643 6644 #endif // ENABLE_EXPLICIT_LINK_KEY_REPLY 6645 /** 6646 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6647 * @param inquiry_mode see bluetooth_defines.h 6648 */ 6649 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6650 hci_stack->inquiry_mode = inquiry_mode; 6651 } 6652 6653 /** 6654 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6655 */ 6656 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6657 hci_stack->sco_voice_setting = voice_setting; 6658 } 6659 6660 /** 6661 * @brief Get SCO Voice Setting 6662 * @return current voice setting 6663 */ 6664 uint16_t hci_get_sco_voice_setting(void){ 6665 return hci_stack->sco_voice_setting; 6666 } 6667 6668 static int hci_have_usb_transport(void){ 6669 if (!hci_stack->hci_transport) return 0; 6670 const char * transport_name = hci_stack->hci_transport->name; 6671 if (!transport_name) return 0; 6672 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6673 } 6674 6675 /** @brief Get SCO packet length for current SCO Voice setting 6676 * @note Using SCO packets of the exact length is required for USB transfer 6677 * @return Length of SCO packets in bytes (not audio frames) 6678 */ 6679 uint16_t hci_get_sco_packet_length(void){ 6680 uint16_t sco_packet_length = 0; 6681 6682 #ifdef ENABLE_SCO_OVER_HCI 6683 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6684 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6685 6686 if (hci_have_usb_transport()){ 6687 // see Core Spec for H2 USB Transfer. 6688 // 3 byte SCO header + 24 bytes per connection 6689 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6690 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6691 } else { 6692 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6693 sco_packet_length = 3 + 60 * multiplier; 6694 // assert that it still fits inside an SCO buffer 6695 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6696 sco_packet_length = 3 + 60; 6697 } 6698 } 6699 #endif 6700 6701 #ifdef HAVE_SCO_TRANSPORT 6702 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6703 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6704 sco_packet_length = 3 + 60 * multiplier; 6705 #endif 6706 return sco_packet_length; 6707 } 6708 6709 /** 6710 * @brief Sets the master/slave policy 6711 * @param policy (0: attempt to become master, 1: let connecting device decide) 6712 */ 6713 void hci_set_master_slave_policy(uint8_t policy){ 6714 hci_stack->master_slave_policy = policy; 6715 } 6716 6717 #endif 6718 6719 HCI_STATE hci_get_state(void){ 6720 return hci_stack->state; 6721 } 6722 6723 #ifdef ENABLE_CLASSIC 6724 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6725 hci_stack->gap_classic_accept_callback = accept_callback; 6726 } 6727 #endif 6728 6729 /** 6730 * @brief Set callback for Bluetooth Hardware Error 6731 */ 6732 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6733 hci_stack->hardware_error_callback = fn; 6734 } 6735 6736 void hci_disconnect_all(void){ 6737 btstack_linked_list_iterator_t it; 6738 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6739 while (btstack_linked_list_iterator_has_next(&it)){ 6740 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6741 if (con->state == SENT_DISCONNECT) continue; 6742 con->state = SEND_DISCONNECT; 6743 } 6744 hci_run(); 6745 } 6746 6747 uint16_t hci_get_manufacturer(void){ 6748 return hci_stack->manufacturer; 6749 } 6750 6751 #ifdef ENABLE_BLE 6752 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6753 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6754 if (!hci_con) return NULL; 6755 return &hci_con->sm_connection; 6756 } 6757 6758 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6759 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6760 #endif 6761 6762 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6763 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6764 if (hci_connection == NULL) return 0; 6765 if (hci_is_le_connection(hci_connection)){ 6766 #ifdef ENABLE_BLE 6767 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6768 if (sm_conn->sm_connection_encrypted) { 6769 return sm_conn->sm_actual_encryption_key_size; 6770 } 6771 #endif 6772 } else { 6773 #ifdef ENABLE_CLASSIC 6774 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6775 return hci_connection->encryption_key_size; 6776 } 6777 #endif 6778 } 6779 return 0; 6780 } 6781 6782 int gap_authenticated(hci_con_handle_t con_handle){ 6783 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6784 if (hci_connection == NULL) return 0; 6785 6786 switch (hci_connection->address_type){ 6787 #ifdef ENABLE_BLE 6788 case BD_ADDR_TYPE_LE_PUBLIC: 6789 case BD_ADDR_TYPE_LE_RANDOM: 6790 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6791 return hci_connection->sm_connection.sm_connection_authenticated; 6792 #endif 6793 #ifdef ENABLE_CLASSIC 6794 case BD_ADDR_TYPE_SCO: 6795 case BD_ADDR_TYPE_ACL: 6796 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6797 #endif 6798 default: 6799 return 0; 6800 } 6801 } 6802 6803 int gap_secure_connection(hci_con_handle_t con_handle){ 6804 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6805 if (hci_connection == NULL) return 0; 6806 6807 switch (hci_connection->address_type){ 6808 #ifdef ENABLE_BLE 6809 case BD_ADDR_TYPE_LE_PUBLIC: 6810 case BD_ADDR_TYPE_LE_RANDOM: 6811 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6812 return hci_connection->sm_connection.sm_connection_sc; 6813 #endif 6814 #ifdef ENABLE_CLASSIC 6815 case BD_ADDR_TYPE_SCO: 6816 case BD_ADDR_TYPE_ACL: 6817 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6818 #endif 6819 default: 6820 return 0; 6821 } 6822 } 6823 6824 bool gap_bonded(hci_con_handle_t con_handle){ 6825 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6826 if (hci_connection == NULL) return 0; 6827 6828 #ifdef ENABLE_CLASSIC 6829 link_key_t link_key; 6830 link_key_type_t link_key_type; 6831 #endif 6832 switch (hci_connection->address_type){ 6833 #ifdef ENABLE_BLE 6834 case BD_ADDR_TYPE_LE_PUBLIC: 6835 case BD_ADDR_TYPE_LE_RANDOM: 6836 return hci_connection->sm_connection.sm_le_db_index >= 0; 6837 #endif 6838 #ifdef ENABLE_CLASSIC 6839 case BD_ADDR_TYPE_SCO: 6840 case BD_ADDR_TYPE_ACL: 6841 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6842 #endif 6843 default: 6844 return false; 6845 } 6846 } 6847 6848 #ifdef ENABLE_BLE 6849 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6850 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6851 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6852 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6853 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6854 return sm_conn->sm_connection_authorization_state; 6855 } 6856 #endif 6857 6858 #ifdef ENABLE_CLASSIC 6859 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){ 6860 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6861 if (!conn) return GAP_CONNECTION_INVALID; 6862 conn->sniff_min_interval = sniff_min_interval; 6863 conn->sniff_max_interval = sniff_max_interval; 6864 conn->sniff_attempt = sniff_attempt; 6865 conn->sniff_timeout = sniff_timeout; 6866 hci_run(); 6867 return 0; 6868 } 6869 6870 /** 6871 * @brief Exit Sniff mode 6872 * @param con_handle 6873 @ @return 0 if ok 6874 */ 6875 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6876 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6877 if (!conn) return GAP_CONNECTION_INVALID; 6878 conn->sniff_min_interval = 0xffff; 6879 hci_run(); 6880 return 0; 6881 } 6882 6883 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){ 6884 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6885 if (!conn) return GAP_CONNECTION_INVALID; 6886 conn->sniff_subrating_max_latency = max_latency; 6887 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6888 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6889 hci_run(); 6890 return ERROR_CODE_SUCCESS; 6891 } 6892 6893 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){ 6894 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6895 if (!conn) return GAP_CONNECTION_INVALID; 6896 conn->qos_service_type = service_type; 6897 conn->qos_token_rate = token_rate; 6898 conn->qos_peak_bandwidth = peak_bandwidth; 6899 conn->qos_latency = latency; 6900 conn->qos_delay_variation = delay_variation; 6901 hci_run(); 6902 return ERROR_CODE_SUCCESS; 6903 } 6904 6905 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6906 hci_stack->new_page_scan_interval = page_scan_interval; 6907 hci_stack->new_page_scan_window = page_scan_window; 6908 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_ACTIVITY; 6909 hci_run(); 6910 } 6911 6912 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6913 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6914 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_SCAN_TYPE; 6915 hci_run(); 6916 } 6917 6918 void gap_set_page_timeout(uint16_t page_timeout){ 6919 hci_stack->page_timeout = page_timeout; 6920 hci_stack->gap_tasks |= GAP_TASK_WRITE_PAGE_TIMEOUT; 6921 hci_run(); 6922 } 6923 6924 #endif 6925 6926 void hci_halting_defer(void){ 6927 if (hci_stack->state != HCI_STATE_HALTING) return; 6928 switch (hci_stack->substate){ 6929 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6930 case HCI_HALTING_CLOSE: 6931 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6932 break; 6933 default: 6934 break; 6935 } 6936 } 6937 6938 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6939 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6940 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6941 if (le_device_db_index >= le_device_db_max_count()) return; 6942 uint8_t offset = le_device_db_index >> 3; 6943 uint8_t mask = 1 << (le_device_db_index & 7); 6944 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6945 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6946 // note: go back to remove entries, otherwise, a remove + add will skip the add 6947 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6948 } 6949 } 6950 6951 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6952 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6953 if (le_device_db_index >= le_device_db_max_count()) return; 6954 uint8_t offset = le_device_db_index >> 3; 6955 uint8_t mask = 1 << (le_device_db_index & 7); 6956 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6957 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6958 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6959 } 6960 } 6961 6962 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6963 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6964 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6965 } 6966 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6967 // restart le resolving list update 6968 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6969 } 6970 return ERROR_CODE_SUCCESS; 6971 } 6972 #endif 6973 6974 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6975 void hci_setup_test_connections_fuzz(void){ 6976 hci_connection_t * conn; 6977 6978 // default address: 66:55:44:33:00:01 6979 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6980 6981 // setup Controller info 6982 hci_stack->num_cmd_packets = 255; 6983 hci_stack->acl_packets_total_num = 255; 6984 6985 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6986 addr[5] = 0x01; 6987 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6988 conn->con_handle = addr[5]; 6989 conn->role = HCI_ROLE_SLAVE; 6990 conn->state = RECEIVED_CONNECTION_REQUEST; 6991 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6992 6993 // setup incoming Classic SCO connection with con handle 0x0002 6994 addr[5] = 0x02; 6995 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6996 conn->con_handle = addr[5]; 6997 conn->role = HCI_ROLE_SLAVE; 6998 conn->state = RECEIVED_CONNECTION_REQUEST; 6999 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7000 7001 // setup ready Classic ACL connection with con handle 0x0003 7002 addr[5] = 0x03; 7003 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 7004 conn->con_handle = addr[5]; 7005 conn->role = HCI_ROLE_SLAVE; 7006 conn->state = OPEN; 7007 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7008 7009 // setup ready Classic SCO connection with con handle 0x0004 7010 addr[5] = 0x04; 7011 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 7012 conn->con_handle = addr[5]; 7013 conn->role = HCI_ROLE_SLAVE; 7014 conn->state = OPEN; 7015 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7016 7017 // setup ready LE ACL connection with con handle 0x005 and public address 7018 addr[5] = 0x05; 7019 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 7020 conn->con_handle = addr[5]; 7021 conn->role = HCI_ROLE_SLAVE; 7022 conn->state = OPEN; 7023 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 7024 conn->sm_connection.sm_connection_encrypted = 1; 7025 } 7026 7027 void hci_free_connections_fuzz(void){ 7028 btstack_linked_list_iterator_t it; 7029 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 7030 while (btstack_linked_list_iterator_has_next(&it)){ 7031 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 7032 btstack_linked_list_iterator_remove(&it); 7033 btstack_memory_hci_connection_free(con); 7034 } 7035 } 7036 void hci_simulate_working_fuzz(void){ 7037 hci_init_done(); 7038 hci_stack->num_cmd_packets = 255; 7039 } 7040 #endif 7041