1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 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 ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #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." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static bool hci_remote_ssp_supported(hci_con_handle_t con_handle); 145 static bool hci_ssp_supported(hci_connection_t * connection); 146 static void hci_notify_if_sco_can_send_now(void); 147 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 148 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 149 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 150 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 151 static void hci_connection_timestamp(hci_connection_t *connection); 152 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 153 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 154 #endif 155 156 static int hci_power_control_on(void); 157 static void hci_power_control_off(void); 158 static void hci_state_reset(void); 159 static void hci_emit_transport_packet_sent(void); 160 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 161 static void hci_emit_nr_connections_changed(void); 162 static void hci_emit_hci_open_failed(void); 163 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 164 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 165 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 166 static void hci_run(void); 167 static int hci_is_le_connection(hci_connection_t * connection); 168 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 169 170 #ifdef ENABLE_CLASSIC 171 static int hci_have_usb_transport(void); 172 #endif 173 174 #ifdef ENABLE_BLE 175 #ifdef ENABLE_LE_CENTRAL 176 // called from test/ble_client/advertising_data_parser.c 177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 178 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 179 static hci_connection_t * gap_get_outgoing_connection(void); 180 #endif 181 #endif 182 183 // the STACK is here 184 #ifndef HAVE_MALLOC 185 static hci_stack_t hci_stack_static; 186 #endif 187 static hci_stack_t * hci_stack = NULL; 188 189 #ifdef ENABLE_CLASSIC 190 // default name 191 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 192 193 // test helper 194 static uint8_t disable_l2cap_timeouts = 0; 195 #endif 196 197 /** 198 * create connection for given address 199 * 200 * @return connection OR NULL, if no memory left 201 */ 202 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 203 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 204 hci_connection_t * conn = btstack_memory_hci_connection_get(); 205 if (!conn) return NULL; 206 bd_addr_copy(conn->address, addr); 207 conn->role = HCI_ROLE_INVALID; 208 conn->address_type = addr_type; 209 conn->con_handle = 0xffff; 210 conn->authentication_flags = AUTH_FLAG_NONE; 211 conn->bonding_flags = 0; 212 conn->requested_security_level = LEVEL_0; 213 #ifdef ENABLE_CLASSIC 214 conn->request_role = HCI_ROLE_INVALID; 215 conn->sniff_subrating_max_latency = 0xffff; 216 conn->qos_service_type = HCI_SERVICE_TYPE_INVALID; 217 conn->link_key_type = INVALID_LINK_KEY; 218 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 219 btstack_run_loop_set_timer_context(&conn->timeout, conn); 220 hci_connection_timestamp(conn); 221 #endif 222 conn->acl_recombination_length = 0; 223 conn->acl_recombination_pos = 0; 224 conn->num_packets_sent = 0; 225 226 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 227 #ifdef ENABLE_BLE 228 conn->le_phy_update_all_phys = 0xff; 229 #endif 230 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 231 conn->le_max_tx_octets = 27; 232 #endif 233 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 234 return conn; 235 } 236 237 238 /** 239 * get le connection parameter range 240 * 241 * @return le connection parameter range struct 242 */ 243 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 244 *range = hci_stack->le_connection_parameter_range; 245 } 246 247 /** 248 * set le connection parameter range 249 * 250 */ 251 252 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 253 hci_stack->le_connection_parameter_range = *range; 254 } 255 256 /** 257 * @brief Test if connection parameters are inside in existing rage 258 * @param conn_interval_min (unit: 1.25ms) 259 * @param conn_interval_max (unit: 1.25ms) 260 * @param conn_latency 261 * @param supervision_timeout (unit: 10ms) 262 * @returns 1 if included 263 */ 264 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){ 265 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 266 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 267 268 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 269 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 270 271 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 272 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 273 274 return 1; 275 } 276 277 /** 278 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 279 * @note: default: 1 280 * @param max_peripheral_connections 281 */ 282 #ifdef ENABLE_LE_PERIPHERAL 283 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 284 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 285 } 286 #endif 287 288 /** 289 * get hci connections iterator 290 * 291 * @return hci connections iterator 292 */ 293 294 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 295 btstack_linked_list_iterator_init(it, &hci_stack->connections); 296 } 297 298 /** 299 * get connection for a given handle 300 * 301 * @return connection OR NULL, if not found 302 */ 303 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 304 btstack_linked_list_iterator_t it; 305 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 306 while (btstack_linked_list_iterator_has_next(&it)){ 307 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 308 if ( item->con_handle == con_handle ) { 309 return item; 310 } 311 } 312 return NULL; 313 } 314 315 /** 316 * get connection for given address 317 * 318 * @return connection OR NULL, if not found 319 */ 320 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 321 btstack_linked_list_iterator_t it; 322 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 323 while (btstack_linked_list_iterator_has_next(&it)){ 324 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 325 if (connection->address_type != addr_type) continue; 326 if (memcmp(addr, connection->address, 6) != 0) continue; 327 return connection; 328 } 329 return NULL; 330 } 331 332 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 333 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 334 } 335 336 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 337 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 338 } 339 340 #ifdef ENABLE_CLASSIC 341 342 #ifdef ENABLE_SCO_OVER_HCI 343 static int hci_number_sco_connections(void){ 344 int connections = 0; 345 btstack_linked_list_iterator_t it; 346 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 347 while (btstack_linked_list_iterator_has_next(&it)){ 348 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 349 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 350 connections++; 351 } 352 return connections; 353 } 354 #endif 355 356 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 357 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 358 #ifdef HAVE_EMBEDDED_TICK 359 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 360 // connections might be timed out 361 hci_emit_l2cap_check_timeout(connection); 362 } 363 #else 364 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 365 // connections might be timed out 366 hci_emit_l2cap_check_timeout(connection); 367 } 368 #endif 369 } 370 371 static void hci_connection_timestamp(hci_connection_t *connection){ 372 #ifdef HAVE_EMBEDDED_TICK 373 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 374 #else 375 connection->timestamp = btstack_run_loop_get_time_ms(); 376 #endif 377 } 378 379 /** 380 * add authentication flags and reset timer 381 * @note: assumes classic connection 382 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 383 */ 384 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 385 bd_addr_t addr; 386 reverse_bd_addr(bd_addr, addr); 387 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 388 if (conn) { 389 connectionSetAuthenticationFlags(conn, flags); 390 hci_connection_timestamp(conn); 391 } 392 } 393 394 static bool hci_pairing_active(hci_connection_t * hci_connection){ 395 return (hci_connection->authentication_flags & AUTH_FLAG_PAIRING_ACTIVE_MASK) != 0; 396 } 397 398 static void hci_pairing_started(hci_connection_t * hci_connection, bool ssp){ 399 if (hci_pairing_active(hci_connection)) return; 400 if (ssp){ 401 hci_connection->authentication_flags |= AUTH_FLAG_SSP_PAIRING_ACTIVE; 402 } else { 403 hci_connection->authentication_flags |= AUTH_FLAG_LEGACY_PAIRING_ACTIVE; 404 } 405 // if we are initiator, we have sent an HCI Authenticate Request 406 bool initiator = (hci_connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0; 407 408 // if we are responder, use minimal service security level as required level 409 if (!initiator){ 410 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); 411 } 412 413 log_info("pairing started, ssp %u, initiator %u, requested level %u", (int) ssp, (int) initiator, hci_connection->requested_security_level); 414 415 uint8_t event[12]; 416 event[0] = GAP_EVENT_PAIRING_STARTED; 417 event[1] = 10; 418 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 bool hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return false; 443 return hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 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){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 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); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 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); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 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); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 bool hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return false; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return true; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static bool hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 bool hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return false; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 bool hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return false; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 bool hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return false; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 bool hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return false; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 bool hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return false; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 bool hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return false; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 bool hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 bool hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return false; 701 } 702 hci_stack->hci_packet_buffer_reserved = true; 703 return true; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = false; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static uint8_t hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // 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); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 uint8_t status = ERROR_CODE_SUCCESS; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 int err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 if (err != 0){ 781 // no error from HCI Transport expected 782 status = ERROR_CODE_HARDWARE_FAILURE; 783 } 784 785 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 786 787 // done yet? 788 if (!more_fragments) break; 789 790 // can send more? 791 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return status; 792 } 793 794 log_debug("hci_send_acl_packet_fragments loop over"); 795 796 // release buffer now for synchronous transport 797 if (hci_transport_synchronous()){ 798 hci_stack->acl_fragmentation_tx_active = 0; 799 hci_release_packet_buffer(); 800 hci_emit_transport_packet_sent(); 801 } 802 803 return status; 804 } 805 806 // pre: caller has reserved the packet buffer 807 uint8_t hci_send_acl_packet_buffer(int size){ 808 btstack_assert(hci_stack->hci_packet_buffer_reserved); 809 810 uint8_t * packet = hci_stack->hci_packet_buffer; 811 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 812 813 // check for free places on Bluetooth module 814 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 815 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 816 hci_release_packet_buffer(); 817 hci_emit_transport_packet_sent(); 818 return BTSTACK_ACL_BUFFERS_FULL; 819 } 820 821 hci_connection_t *connection = hci_connection_for_handle( con_handle); 822 if (!connection) { 823 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 824 hci_release_packet_buffer(); 825 hci_emit_transport_packet_sent(); 826 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 827 } 828 829 #ifdef ENABLE_CLASSIC 830 hci_connection_timestamp(connection); 831 #endif 832 833 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 834 835 // setup data 836 hci_stack->acl_fragmentation_total_size = size; 837 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 838 839 return hci_send_acl_packet_fragments(connection); 840 } 841 842 #ifdef ENABLE_CLASSIC 843 // pre: caller has reserved the packet buffer 844 uint8_t hci_send_sco_packet_buffer(int size){ 845 btstack_assert(hci_stack->hci_packet_buffer_reserved); 846 847 uint8_t * packet = hci_stack->hci_packet_buffer; 848 849 // skip checks in loopback mode 850 if (!hci_stack->loopback_mode){ 851 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 852 853 // check for free places on Bluetooth module 854 if (!hci_can_send_prepared_sco_packet_now()) { 855 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 856 hci_release_packet_buffer(); 857 hci_emit_transport_packet_sent(); 858 return BTSTACK_ACL_BUFFERS_FULL; 859 } 860 861 // track send packet in connection struct 862 hci_connection_t *connection = hci_connection_for_handle( con_handle); 863 if (!connection) { 864 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 865 hci_release_packet_buffer(); 866 hci_emit_transport_packet_sent(); 867 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 868 } 869 870 if (hci_have_usb_transport()){ 871 // token used 872 hci_stack->sco_can_send_now = false; 873 } else { 874 if (hci_stack->synchronous_flow_control_enabled){ 875 connection->num_packets_sent++; 876 } else { 877 connection->sco_tx_ready--; 878 } 879 } 880 } 881 882 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 883 884 #ifdef HAVE_SCO_TRANSPORT 885 hci_stack->sco_transport->send_packet(packet, size); 886 hci_release_packet_buffer(); 887 hci_emit_transport_packet_sent(); 888 889 return 0; 890 #else 891 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 892 if (hci_transport_synchronous()){ 893 hci_release_packet_buffer(); 894 hci_emit_transport_packet_sent(); 895 } 896 897 if (err != 0){ 898 return ERROR_CODE_HARDWARE_FAILURE; 899 } 900 return ERROR_CODE_SUCCESS; 901 #endif 902 } 903 #endif 904 905 static void acl_handler(uint8_t *packet, uint16_t size){ 906 907 // get info 908 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 909 hci_connection_t *conn = hci_connection_for_handle(con_handle); 910 uint8_t acl_flags = READ_ACL_FLAGS(packet); 911 uint16_t acl_length = READ_ACL_LENGTH(packet); 912 913 // ignore non-registered handle 914 if (!conn){ 915 log_error("acl_handler called with non-registered handle %u!" , con_handle); 916 return; 917 } 918 919 // assert packet is complete 920 if ((acl_length + 4u) != size){ 921 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 922 return; 923 } 924 925 #ifdef ENABLE_CLASSIC 926 // update idle timestamp 927 hci_connection_timestamp(conn); 928 #endif 929 930 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 931 hci_stack->host_completed_packets = 1; 932 conn->num_packets_completed++; 933 #endif 934 935 // handle different packet types 936 switch (acl_flags & 0x03u) { 937 938 case 0x01: // continuation fragment 939 940 // sanity checks 941 if (conn->acl_recombination_pos == 0u) { 942 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 943 return; 944 } 945 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 946 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 947 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 948 conn->acl_recombination_pos = 0; 949 return; 950 } 951 952 // append fragment payload (header already stored) 953 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 954 &packet[4], acl_length); 955 conn->acl_recombination_pos += acl_length; 956 957 // forward complete L2CAP packet if complete. 958 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 959 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 960 // reset recombination buffer 961 conn->acl_recombination_length = 0; 962 conn->acl_recombination_pos = 0; 963 } 964 break; 965 966 case 0x02: { // first fragment 967 968 // sanity check 969 if (conn->acl_recombination_pos) { 970 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 971 conn->acl_recombination_pos = 0; 972 } 973 974 // peek into L2CAP packet! 975 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 976 977 // compare fragment size to L2CAP packet size 978 if (acl_length >= (l2cap_length + 4u)){ 979 // forward fragment as L2CAP packet 980 hci_emit_acl_packet(packet, acl_length + 4u); 981 } else { 982 983 if (acl_length > HCI_ACL_BUFFER_SIZE){ 984 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 985 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 986 return; 987 } 988 989 // store first fragment and tweak acl length for complete package 990 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 991 packet, acl_length + 4u); 992 conn->acl_recombination_pos = acl_length + 4u; 993 conn->acl_recombination_length = l2cap_length; 994 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 995 } 996 break; 997 998 } 999 default: 1000 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1001 return; 1002 } 1003 1004 // execute main loop 1005 hci_run(); 1006 } 1007 1008 static void hci_shutdown_connection(hci_connection_t *conn){ 1009 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1010 1011 #ifdef ENABLE_CLASSIC 1012 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1013 bd_addr_type_t addr_type = conn->address_type; 1014 #endif 1015 #ifdef HAVE_SCO_TRANSPORT 1016 hci_con_handle_t con_handle = conn->con_handle; 1017 #endif 1018 #endif 1019 1020 btstack_run_loop_remove_timer(&conn->timeout); 1021 1022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1023 btstack_memory_hci_connection_free( conn ); 1024 1025 // now it's gone 1026 hci_emit_nr_connections_changed(); 1027 1028 #ifdef ENABLE_CLASSIC 1029 #ifdef ENABLE_SCO_OVER_HCI 1030 // update SCO 1031 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1032 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1033 } 1034 #endif 1035 #ifdef HAVE_SCO_TRANSPORT 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1037 hci_stack->sco_transport->close(con_handle); 1038 } 1039 #endif 1040 #endif 1041 } 1042 1043 #ifdef ENABLE_CLASSIC 1044 1045 static const uint16_t packet_type_sizes[] = { 1046 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1047 HCI_ACL_DH1_SIZE, 0, 0, 0, 1048 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1049 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1050 }; 1051 static const uint8_t packet_type_feature_requirement_bit[] = { 1052 0, // 3 slot packets 1053 1, // 5 slot packets 1054 25, // EDR 2 mpbs 1055 26, // EDR 3 mbps 1056 39, // 3 slot EDR packts 1057 40, // 5 slot EDR packet 1058 }; 1059 static const uint16_t packet_type_feature_packet_mask[] = { 1060 0x0f00, // 3 slot packets 1061 0xf000, // 5 slot packets 1062 0x1102, // EDR 2 mpbs 1063 0x2204, // EDR 3 mbps 1064 0x0300, // 3 slot EDR packts 1065 0x3000, // 5 slot EDR packet 1066 }; 1067 1068 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1069 // enable packet types based on size 1070 uint16_t packet_types = 0; 1071 unsigned int i; 1072 for (i=0;i<16;i++){ 1073 if (packet_type_sizes[i] == 0) continue; 1074 if (packet_type_sizes[i] <= buffer_size){ 1075 packet_types |= 1 << i; 1076 } 1077 } 1078 // disable packet types due to missing local supported features 1079 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1080 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1081 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1082 if (feature_set) continue; 1083 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1084 packet_types &= ~packet_type_feature_packet_mask[i]; 1085 } 1086 // flip bits for "may not be used" 1087 packet_types ^= 0x3306; 1088 return packet_types; 1089 } 1090 1091 uint16_t hci_usable_acl_packet_types(void){ 1092 return hci_stack->packet_types; 1093 } 1094 #endif 1095 1096 uint8_t* hci_get_outgoing_packet_buffer(void){ 1097 // hci packet buffer is >= acl data packet length 1098 return hci_stack->hci_packet_buffer; 1099 } 1100 1101 uint16_t hci_max_acl_data_packet_length(void){ 1102 return hci_stack->acl_data_packet_length; 1103 } 1104 1105 #ifdef ENABLE_CLASSIC 1106 bool hci_extended_sco_link_supported(void){ 1107 // No. 31, byte 3, bit 7 1108 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1109 } 1110 #endif 1111 1112 bool hci_non_flushable_packet_boundary_flag_supported(void){ 1113 // No. 54, byte 6, bit 6 1114 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1115 } 1116 1117 static int gap_ssp_supported(void){ 1118 // No. 51, byte 6, bit 3 1119 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1120 } 1121 1122 static int hci_classic_supported(void){ 1123 #ifdef ENABLE_CLASSIC 1124 // No. 37, byte 4, bit 5, = No BR/EDR Support 1125 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1126 #else 1127 return 0; 1128 #endif 1129 } 1130 1131 static int hci_le_supported(void){ 1132 #ifdef ENABLE_BLE 1133 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1134 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1135 #else 1136 return 0; 1137 #endif 1138 } 1139 1140 #ifdef ENABLE_BLE 1141 1142 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1143 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1144 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1145 } else { 1146 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1147 } 1148 } 1149 1150 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1151 *addr_type = hci_stack->le_own_addr_type; 1152 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1153 } 1154 1155 #ifdef ENABLE_LE_PERIPHERAL 1156 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1157 *addr_type = hci_stack->le_advertisements_own_addr_type; 1158 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1159 }; 1160 #endif 1161 1162 #ifdef ENABLE_LE_CENTRAL 1163 1164 /** 1165 * @brief Get own addr type and address used for LE connections (Central) 1166 */ 1167 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1168 *addr_type = hci_stack->le_connection_own_addr_type; 1169 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1170 } 1171 1172 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1173 1174 int offset = 3; 1175 int num_reports = packet[offset]; 1176 offset += 1; 1177 1178 int i; 1179 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1180 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1181 for (i=0; (i<num_reports) && (offset < size);i++){ 1182 // sanity checks on data_length: 1183 uint8_t data_length = packet[offset + 8]; 1184 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1185 if ((offset + 9u + data_length + 1u) > size) return; 1186 // setup event 1187 uint8_t event_size = 10u + data_length; 1188 int pos = 0; 1189 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1190 event[pos++] = event_size; 1191 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1192 offset += 8; 1193 pos += 8; 1194 event[pos++] = packet[offset + 1 + data_length]; // rssi 1195 event[pos++] = data_length; 1196 offset++; 1197 (void)memcpy(&event[pos], &packet[offset], data_length); 1198 pos += data_length; 1199 offset += data_length + 1u; // rssi 1200 hci_emit_event(event, pos, 1); 1201 } 1202 } 1203 #endif 1204 #endif 1205 1206 #ifdef ENABLE_BLE 1207 #ifdef ENABLE_LE_PERIPHERAL 1208 static void hci_update_advertisements_enabled_for_current_roles(void){ 1209 if (hci_stack->le_advertisements_enabled){ 1210 // get number of active le slave connections 1211 int num_slave_connections = 0; 1212 btstack_linked_list_iterator_t it; 1213 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1214 while (btstack_linked_list_iterator_has_next(&it)){ 1215 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1216 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1217 if (con->state != OPEN) continue; 1218 if (con->role != HCI_ROLE_SLAVE) continue; 1219 if (!hci_is_le_connection(con)) continue; 1220 num_slave_connections++; 1221 } 1222 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1223 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1224 } else { 1225 hci_stack->le_advertisements_enabled_for_current_roles = false; 1226 } 1227 } 1228 #endif 1229 #endif 1230 1231 #ifdef ENABLE_CLASSIC 1232 static void gap_run_set_local_name(void){ 1233 hci_reserve_packet_buffer(); 1234 uint8_t * packet = hci_stack->hci_packet_buffer; 1235 // construct HCI Command and send 1236 uint16_t opcode = hci_write_local_name.opcode; 1237 hci_stack->last_cmd_opcode = opcode; 1238 packet[0] = opcode & 0xff; 1239 packet[1] = opcode >> 8; 1240 packet[2] = DEVICE_NAME_LEN; 1241 memset(&packet[3], 0, DEVICE_NAME_LEN); 1242 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1243 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1244 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1245 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1246 // expand '00:00:00:00:00:00' in name with bd_addr 1247 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1248 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1249 } 1250 1251 static void gap_run_set_eir_data(void){ 1252 hci_reserve_packet_buffer(); 1253 uint8_t * packet = hci_stack->hci_packet_buffer; 1254 // construct HCI Command in-place and send 1255 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1256 hci_stack->last_cmd_opcode = opcode; 1257 uint16_t offset = 0; 1258 packet[offset++] = opcode & 0xff; 1259 packet[offset++] = opcode >> 8; 1260 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1261 packet[offset++] = 0; // FEC not required 1262 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1263 if (hci_stack->eir_data){ 1264 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1265 ad_context_t context; 1266 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1267 uint8_t data_type = ad_iterator_get_data_type(&context); 1268 uint8_t size = ad_iterator_get_data_len(&context); 1269 const uint8_t *data = ad_iterator_get_data(&context); 1270 // copy item 1271 packet[offset++] = size + 1; 1272 packet[offset++] = data_type; 1273 memcpy(&packet[offset], data, size); 1274 // update name item 1275 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1276 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1277 } 1278 offset += size; 1279 } 1280 } else { 1281 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1282 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1283 packet[offset++] = bytes_to_copy + 1; 1284 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1285 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1286 // expand '00:00:00:00:00:00' in name with bd_addr 1287 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1288 } 1289 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1290 } 1291 #endif 1292 1293 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1294 1295 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1296 if (!hci_stack->config) return 0; 1297 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1298 // Limit baud rate for Broadcom chipsets to 3 mbps 1299 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1300 baud_rate = 3000000; 1301 } 1302 return baud_rate; 1303 } 1304 1305 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1306 UNUSED(ds); 1307 1308 switch (hci_stack->substate){ 1309 case HCI_INIT_W4_SEND_RESET: 1310 log_info("Resend HCI Reset"); 1311 hci_stack->substate = HCI_INIT_SEND_RESET; 1312 hci_stack->num_cmd_packets = 1; 1313 hci_run(); 1314 break; 1315 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1316 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1317 if (hci_stack->hci_transport->reset_link){ 1318 hci_stack->hci_transport->reset_link(); 1319 } 1320 1321 /* fall through */ 1322 1323 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1324 log_info("Resend HCI Reset - CSR Warm Boot"); 1325 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1326 hci_stack->num_cmd_packets = 1; 1327 hci_run(); 1328 break; 1329 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1330 if (hci_stack->hci_transport->set_baudrate){ 1331 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1332 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1336 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1337 if (hci_stack->hci_transport->reset_link){ 1338 log_info("Link Reset"); 1339 hci_stack->hci_transport->reset_link(); 1340 } 1341 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1342 hci_run(); 1343 } 1344 break; 1345 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1346 // otherwise continue 1347 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1348 hci_send_cmd(&hci_read_local_supported_commands); 1349 break; 1350 default: 1351 break; 1352 } 1353 } 1354 #endif 1355 1356 static void hci_initializing_next_state(void){ 1357 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1358 } 1359 1360 // assumption: hci_can_send_command_packet_now() == true 1361 static void hci_initializing_run(void){ 1362 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1363 switch (hci_stack->substate){ 1364 case HCI_INIT_SEND_RESET: 1365 hci_state_reset(); 1366 1367 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1368 // prepare reset if command complete not received in 100ms 1369 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1370 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1371 btstack_run_loop_add_timer(&hci_stack->timeout); 1372 #endif 1373 // send command 1374 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1375 hci_send_cmd(&hci_reset); 1376 break; 1377 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1378 hci_send_cmd(&hci_read_local_version_information); 1379 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1380 break; 1381 case HCI_INIT_SEND_READ_LOCAL_NAME: 1382 hci_send_cmd(&hci_read_local_name); 1383 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1384 break; 1385 1386 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1387 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1388 hci_state_reset(); 1389 // prepare reset if command complete not received in 100ms 1390 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1391 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1392 btstack_run_loop_add_timer(&hci_stack->timeout); 1393 // send command 1394 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1395 hci_send_cmd(&hci_reset); 1396 break; 1397 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1398 hci_state_reset(); 1399 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1400 hci_send_cmd(&hci_reset); 1401 break; 1402 case HCI_INIT_SEND_BAUD_CHANGE: { 1403 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1404 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1405 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1406 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1407 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1408 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1409 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1410 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1411 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1412 btstack_run_loop_add_timer(&hci_stack->timeout); 1413 } 1414 break; 1415 } 1416 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1417 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1418 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1419 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1420 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1421 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1422 break; 1423 } 1424 case HCI_INIT_CUSTOM_INIT: 1425 // Custom initialization 1426 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1427 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1428 bool send_cmd = false; 1429 switch (hci_stack->chipset_result){ 1430 case BTSTACK_CHIPSET_VALID_COMMAND: 1431 send_cmd = true; 1432 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1433 break; 1434 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1435 send_cmd = true; 1436 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1437 log_info("CSR Warm Boot"); 1438 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1439 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1440 btstack_run_loop_add_timer(&hci_stack->timeout); 1441 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1442 && hci_stack->config 1443 && hci_stack->chipset 1444 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1445 && hci_stack->hci_transport->set_baudrate 1446 && hci_transport_uart_get_main_baud_rate()){ 1447 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1448 } else { 1449 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1450 } 1451 break; 1452 default: 1453 break; 1454 } 1455 1456 if (send_cmd){ 1457 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1458 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1459 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1460 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1461 break; 1462 } 1463 log_info("Init script done"); 1464 1465 // Init script download on Broadcom chipsets causes: 1466 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1467 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1468 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1469 1470 // - baud rate to reset, restore UART baud rate if needed 1471 int need_baud_change = hci_stack->config 1472 && hci_stack->chipset 1473 && hci_stack->chipset->set_baudrate_command 1474 && hci_stack->hci_transport->set_baudrate 1475 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1476 if (need_baud_change) { 1477 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1478 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1479 hci_stack->hci_transport->set_baudrate(baud_rate); 1480 } 1481 1482 uint16_t bcm_delay_ms = 300; 1483 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1484 // -> Work around: wait here. 1485 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1486 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1487 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1488 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1489 btstack_run_loop_add_timer(&hci_stack->timeout); 1490 break; 1491 } 1492 } 1493 // otherwise continue 1494 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1495 hci_send_cmd(&hci_read_local_supported_commands); 1496 break; 1497 case HCI_INIT_SET_BD_ADDR: 1498 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1499 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1500 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1501 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1502 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1503 break; 1504 #endif 1505 1506 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1507 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1508 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1509 hci_send_cmd(&hci_read_local_supported_commands); 1510 break; 1511 case HCI_INIT_READ_BD_ADDR: 1512 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1513 hci_send_cmd(&hci_read_bd_addr); 1514 break; 1515 case HCI_INIT_READ_BUFFER_SIZE: 1516 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1517 hci_send_cmd(&hci_read_buffer_size); 1518 break; 1519 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1520 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1521 hci_send_cmd(&hci_read_local_supported_features); 1522 break; 1523 1524 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1525 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1526 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1527 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1528 break; 1529 case HCI_INIT_HOST_BUFFER_SIZE: 1530 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1531 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1532 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1533 break; 1534 #endif 1535 1536 case HCI_INIT_SET_EVENT_MASK: 1537 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1538 if (hci_le_supported()){ 1539 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1540 } else { 1541 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1542 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1543 } 1544 break; 1545 1546 #ifdef ENABLE_CLASSIC 1547 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1548 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1549 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1550 break; 1551 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1552 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1553 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1554 break; 1555 case HCI_INIT_WRITE_INQUIRY_MODE: 1556 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1557 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1558 break; 1559 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1560 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1561 hci_stack->secure_connections_active = true; 1562 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1563 break; 1564 case HCI_INIT_WRITE_SCAN_ENABLE: 1565 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1566 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1567 break; 1568 // only sent if ENABLE_SCO_OVER_HCI is defined 1569 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1570 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1571 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1572 break; 1573 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1574 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1575 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1576 break; 1577 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1578 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1579 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1580 #ifdef ENABLE_SCO_OVER_HCI 1581 log_info("BCM: Route SCO data via HCI transport"); 1582 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1583 #endif 1584 #ifdef ENABLE_SCO_OVER_PCM 1585 log_info("BCM: Route SCO data via PCM interface"); 1586 #ifdef ENABLE_BCM_PCM_WBS 1587 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1588 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1589 #else 1590 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1591 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1592 #endif 1593 #endif 1594 break; 1595 #ifdef ENABLE_SCO_OVER_PCM 1596 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1597 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1598 log_info("BCM: Config PCM interface for I2S"); 1599 #ifdef ENABLE_BCM_PCM_WBS 1600 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1601 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1602 #else 1603 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1604 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1605 #endif 1606 break; 1607 #endif 1608 #endif 1609 1610 #ifdef ENABLE_BLE 1611 // LE INIT 1612 case HCI_INIT_LE_READ_BUFFER_SIZE: 1613 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1614 hci_send_cmd(&hci_le_read_buffer_size); 1615 break; 1616 case HCI_INIT_LE_SET_EVENT_MASK: 1617 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1618 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1619 break; 1620 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1621 // LE Supported Host = 1, Simultaneous Host = 0 1622 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1623 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1624 break; 1625 #endif 1626 1627 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1628 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1629 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1630 hci_send_cmd(&hci_le_read_maximum_data_length); 1631 break; 1632 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1633 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1634 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1635 break; 1636 #endif 1637 1638 #ifdef ENABLE_LE_CENTRAL 1639 case HCI_INIT_READ_WHITE_LIST_SIZE: 1640 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1641 hci_send_cmd(&hci_le_read_white_list_size); 1642 break; 1643 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1644 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1645 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); 1646 break; 1647 #endif 1648 default: 1649 return; 1650 } 1651 } 1652 1653 static void hci_init_done(void){ 1654 // done. tell the app 1655 log_info("hci_init_done -> HCI_STATE_WORKING"); 1656 hci_stack->state = HCI_STATE_WORKING; 1657 hci_emit_state(); 1658 hci_run(); 1659 } 1660 1661 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1662 bool command_completed = false; 1663 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1664 uint16_t opcode = little_endian_read_16(packet,3); 1665 if (opcode == hci_stack->last_cmd_opcode){ 1666 command_completed = true; 1667 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1668 } else { 1669 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1670 } 1671 } 1672 1673 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1674 uint8_t status = packet[2]; 1675 uint16_t opcode = little_endian_read_16(packet,4); 1676 if (opcode == hci_stack->last_cmd_opcode){ 1677 if (status){ 1678 command_completed = true; 1679 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1680 } else { 1681 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1682 } 1683 } else { 1684 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1685 } 1686 } 1687 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1688 // Vendor == CSR 1689 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1690 // TODO: track actual command 1691 command_completed = true; 1692 } 1693 1694 // Vendor == Toshiba 1695 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1696 // TODO: track actual command 1697 command_completed = true; 1698 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1699 hci_stack->num_cmd_packets = 1; 1700 } 1701 #endif 1702 1703 return command_completed; 1704 } 1705 1706 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1707 1708 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1709 1710 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1711 1712 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1713 1714 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1715 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1716 // 1717 // HCI Reset 1718 // Timeout 100 ms 1719 // HCI Reset 1720 // Command Complete Reset 1721 // HCI Read Local Version Information 1722 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1723 // hang... 1724 // 1725 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1726 if (!command_completed 1727 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1728 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1729 1730 uint16_t opcode = little_endian_read_16(packet,3); 1731 if (opcode == hci_reset.opcode){ 1732 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1733 return; 1734 } 1735 } 1736 1737 // CSR & H5 1738 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1739 if (!command_completed 1740 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1741 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1742 1743 uint16_t opcode = little_endian_read_16(packet,3); 1744 if (opcode == hci_reset.opcode){ 1745 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1746 return; 1747 } 1748 } 1749 1750 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1751 // fix: Correct substate and behave as command below 1752 if (command_completed){ 1753 switch (hci_stack->substate){ 1754 case HCI_INIT_SEND_RESET: 1755 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1756 break; 1757 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1758 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1759 break; 1760 default: 1761 break; 1762 } 1763 } 1764 1765 #endif 1766 1767 if (!command_completed) return; 1768 1769 bool need_baud_change = false; 1770 bool need_addr_change = false; 1771 1772 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1773 need_baud_change = hci_stack->config 1774 && hci_stack->chipset 1775 && hci_stack->chipset->set_baudrate_command 1776 && hci_stack->hci_transport->set_baudrate 1777 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1778 1779 need_addr_change = hci_stack->custom_bd_addr_set 1780 && hci_stack->chipset 1781 && hci_stack->chipset->set_bd_addr_command; 1782 #endif 1783 1784 switch(hci_stack->substate){ 1785 1786 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1787 case HCI_INIT_SEND_RESET: 1788 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1789 // fix: just correct substate and behave as command below 1790 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1791 btstack_run_loop_remove_timer(&hci_stack->timeout); 1792 break; 1793 case HCI_INIT_W4_SEND_RESET: 1794 btstack_run_loop_remove_timer(&hci_stack->timeout); 1795 break; 1796 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1797 log_info("Received local name, need baud change %d", (int) need_baud_change); 1798 if (need_baud_change){ 1799 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1800 return; 1801 } 1802 // skip baud change 1803 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1804 return; 1805 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1806 // for STLC2500D, baud rate change already happened. 1807 // for others, baud rate gets changed now 1808 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1809 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1810 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1811 hci_stack->hci_transport->set_baudrate(baud_rate); 1812 } 1813 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1814 return; 1815 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1816 btstack_run_loop_remove_timer(&hci_stack->timeout); 1817 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1818 return; 1819 case HCI_INIT_W4_CUSTOM_INIT: 1820 // repeat custom init 1821 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1822 return; 1823 #else 1824 case HCI_INIT_W4_SEND_RESET: 1825 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1826 return ; 1827 #endif 1828 1829 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1830 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1831 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1832 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1833 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1834 return; 1835 } 1836 if (need_addr_change){ 1837 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1838 return; 1839 } 1840 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1841 return; 1842 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1843 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1844 if (need_baud_change){ 1845 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1846 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1847 hci_stack->hci_transport->set_baudrate(baud_rate); 1848 } 1849 if (need_addr_change){ 1850 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1851 return; 1852 } 1853 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1854 return; 1855 case HCI_INIT_W4_SET_BD_ADDR: 1856 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1857 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1858 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1859 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1860 return; 1861 } 1862 // skipping st warm boot 1863 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1864 return; 1865 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1866 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1867 return; 1868 #endif 1869 case HCI_INIT_W4_READ_BD_ADDR: 1870 // only read buffer size if supported 1871 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1872 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1873 return; 1874 } 1875 // skipping read buffer size 1876 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1877 return; 1878 case HCI_INIT_W4_SET_EVENT_MASK: 1879 // skip Classic init commands for LE only chipsets 1880 if (!hci_classic_supported()){ 1881 #ifdef ENABLE_BLE 1882 if (hci_le_supported()){ 1883 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1884 return; 1885 } 1886 #endif 1887 log_error("Neither BR/EDR nor LE supported"); 1888 hci_init_done(); 1889 return; 1890 } 1891 if (!gap_ssp_supported()){ 1892 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1893 return; 1894 } 1895 break; 1896 #ifdef ENABLE_BLE 1897 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1898 // skip write le host if not supported (e.g. on LE only EM9301) 1899 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1900 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1901 return; 1902 1903 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1904 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1905 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1906 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1907 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1908 return; 1909 } 1910 // explicit fall through to reduce repetitions 1911 1912 #ifdef ENABLE_LE_CENTRAL 1913 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1914 #else 1915 hci_init_done(); 1916 #endif 1917 return; 1918 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1919 1920 #endif /* ENABLE_BLE */ 1921 1922 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1923 // skip write secure connections host support if not supported or disabled 1924 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1925 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1926 return; 1927 } 1928 break; 1929 1930 #ifdef ENABLE_SCO_OVER_HCI 1931 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1932 // skip write synchronous flow control if not supported 1933 if (hci_stack->local_supported_commands[0] & 0x04) break; 1934 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1935 1936 /* fall through */ 1937 1938 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1939 // skip write default erroneous data reporting if not supported 1940 if (hci_stack->local_supported_commands[0] & 0x08) break; 1941 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1942 1943 /* fall through */ 1944 1945 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1946 // skip bcm set sco pcm config on non-Broadcom chipsets 1947 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1948 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1949 1950 /* fall through */ 1951 1952 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1953 if (!hci_le_supported()){ 1954 // SKIP LE init for Classic only configuration 1955 hci_init_done(); 1956 return; 1957 } 1958 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1959 break; 1960 1961 #else /* !ENABLE_SCO_OVER_HCI */ 1962 1963 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1964 #ifdef ENABLE_SCO_OVER_PCM 1965 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1966 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1967 return; 1968 } 1969 #endif 1970 /* fall through */ 1971 1972 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1973 #ifdef ENABLE_BLE 1974 if (hci_le_supported()){ 1975 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1976 return; 1977 } 1978 #endif 1979 // SKIP LE init for Classic only configuration 1980 hci_init_done(); 1981 return; 1982 #endif /* ENABLE_SCO_OVER_HCI */ 1983 1984 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1985 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1986 // Response to command before init done state -> init done 1987 case (HCI_INIT_DONE-1): 1988 hci_init_done(); 1989 return; 1990 #endif 1991 1992 default: 1993 break; 1994 } 1995 hci_initializing_next_state(); 1996 } 1997 1998 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1999 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2000 bd_addr_t bd_address; 2001 (void)memcpy(&bd_address, conn->address, 6); 2002 2003 #ifdef ENABLE_CLASSIC 2004 // cache needed data 2005 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2006 #endif 2007 2008 // connection failed, remove entry 2009 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2010 btstack_memory_hci_connection_free( conn ); 2011 2012 #ifdef ENABLE_CLASSIC 2013 // notify client if dedicated bonding 2014 if (notify_dedicated_bonding_failed){ 2015 log_info("hci notify_dedicated_bonding_failed"); 2016 hci_emit_dedicated_bonding_result(bd_address, status); 2017 } 2018 2019 // if authentication error, also delete link key 2020 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2021 gap_drop_link_key_for_bd_addr(bd_address); 2022 } 2023 #else 2024 UNUSED(status); 2025 #endif 2026 } 2027 2028 #ifdef ENABLE_CLASSIC 2029 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2030 // SSP Controller 2031 if (features[6] & (1 << 3)){ 2032 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2033 } 2034 // eSCO 2035 if (features[3] & (1<<7)){ 2036 conn->remote_supported_features[0] |= 1; 2037 } 2038 // Extended features 2039 if (features[7] & (1<<7)){ 2040 conn->remote_supported_features[0] |= 2; 2041 } 2042 } 2043 2044 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2045 // SSP Host 2046 if (features[0] & (1 << 0)){ 2047 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2048 } 2049 // SC Host 2050 if (features[0] & (1 << 3)){ 2051 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2052 } 2053 } 2054 2055 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2056 // SC Controller 2057 if (features[1] & (1 << 0)){ 2058 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2059 } 2060 } 2061 2062 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2063 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2064 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2065 if (conn->bonding_flags & BONDING_DEDICATED){ 2066 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2067 } 2068 } 2069 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2070 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2071 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2072 } 2073 2074 #endif 2075 2076 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2077 // handle BT initialization 2078 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2079 hci_initializing_event_handler(packet, size); 2080 } 2081 2082 // help with BT sleep 2083 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2084 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2085 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2086 hci_initializing_next_state(); 2087 } 2088 } 2089 2090 #ifdef ENABLE_CLASSIC 2091 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2092 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2093 conn->encryption_key_size = encryption_key_size; 2094 2095 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2096 conn->requested_security_level = LEVEL_0; 2097 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2098 return; 2099 } 2100 2101 // Request Authentication if not already done 2102 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2103 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2104 } 2105 #endif 2106 2107 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2108 UNUSED(size); 2109 2110 uint16_t manufacturer; 2111 #ifdef ENABLE_CLASSIC 2112 hci_con_handle_t handle; 2113 hci_connection_t * conn; 2114 uint8_t status; 2115 #endif 2116 // get num cmd packets - limit to 1 to reduce complexity 2117 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2118 2119 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2120 switch (opcode){ 2121 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2122 if (packet[5]) break; 2123 // terminate, name 248 chars 2124 packet[6+248] = 0; 2125 log_info("local name: %s", &packet[6]); 2126 break; 2127 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2128 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2129 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2130 uint16_t acl_len = little_endian_read_16(packet, 6); 2131 uint16_t sco_len = packet[8]; 2132 2133 // determine usable ACL/SCO payload size 2134 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2135 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2136 2137 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2138 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2139 2140 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2141 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2142 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2143 } 2144 break; 2145 case HCI_OPCODE_HCI_READ_RSSI: 2146 if (packet[5] == ERROR_CODE_SUCCESS){ 2147 uint8_t event[5]; 2148 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2149 event[1] = 3; 2150 (void)memcpy(&event[2], &packet[6], 3); 2151 hci_emit_event(event, sizeof(event), 1); 2152 } 2153 break; 2154 #ifdef ENABLE_BLE 2155 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2156 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2157 hci_stack->le_acl_packets_total_num = packet[8]; 2158 // determine usable ACL payload size 2159 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2160 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2161 } 2162 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2163 break; 2164 #endif 2165 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2166 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2167 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2168 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2169 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); 2170 break; 2171 #endif 2172 #ifdef ENABLE_LE_CENTRAL 2173 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2174 hci_stack->le_whitelist_capacity = packet[6]; 2175 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2176 break; 2177 #endif 2178 case HCI_OPCODE_HCI_READ_BD_ADDR: 2179 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2180 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)); 2181 #ifdef ENABLE_CLASSIC 2182 if (hci_stack->link_key_db){ 2183 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2184 } 2185 #endif 2186 break; 2187 #ifdef ENABLE_CLASSIC 2188 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2189 hci_emit_discoverable_enabled(hci_stack->discoverable); 2190 break; 2191 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2192 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2193 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2194 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2195 hci_emit_event(event, sizeof(event), 1); 2196 } 2197 break; 2198 #endif 2199 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2200 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2201 2202 #ifdef ENABLE_CLASSIC 2203 // determine usable ACL packet types based on host buffer size and supported features 2204 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2205 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2206 #endif 2207 // Classic/LE 2208 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2209 break; 2210 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2211 manufacturer = little_endian_read_16(packet, 10); 2212 // map Cypress to Broadcom 2213 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2214 log_info("Treat Cypress as Broadcom"); 2215 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2216 little_endian_store_16(packet, 10, manufacturer); 2217 } 2218 hci_stack->manufacturer = manufacturer; 2219 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2220 break; 2221 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2222 hci_stack->local_supported_commands[0] = 2223 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2224 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2225 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2226 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2227 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2228 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2229 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2230 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2231 hci_stack->local_supported_commands[1] = 2232 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2233 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2234 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2237 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2238 break; 2239 #ifdef ENABLE_CLASSIC 2240 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2241 if (packet[5]) return; 2242 hci_stack->synchronous_flow_control_enabled = 1; 2243 break; 2244 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2245 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2246 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2247 conn = hci_connection_for_handle(handle); 2248 if (conn != NULL) { 2249 uint8_t key_size = 0; 2250 if (status == 0){ 2251 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2252 log_info("Handle %04x key Size: %u", handle, key_size); 2253 } else { 2254 key_size = 1; 2255 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2256 } 2257 hci_handle_read_encryption_key_size_complete(conn, key_size); 2258 } 2259 break; 2260 // assert pairing complete event is emitted. 2261 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2262 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2263 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2264 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2265 // lookup connection by gap pairing addr 2266 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2267 if (conn == NULL) break; 2268 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2269 break; 2270 2271 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2272 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2273 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2274 uint8_t event[67]; 2275 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2276 event[1] = 65; 2277 (void)memset(&event[2], 0, 65); 2278 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2279 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2280 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2281 event[2] = 3; 2282 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2283 } else { 2284 event[2] = 1; 2285 } 2286 } 2287 hci_emit_event(event, sizeof(event), 0); 2288 break; 2289 } 2290 2291 // note: only needed if user does not provide OOB data 2292 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2293 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2294 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2295 if (conn == NULL) break; 2296 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2297 break; 2298 #endif 2299 #endif 2300 default: 2301 break; 2302 } 2303 } 2304 2305 #ifdef ENABLE_BLE 2306 static void event_handle_le_connection_complete(const uint8_t * packet){ 2307 bd_addr_t addr; 2308 bd_addr_type_t addr_type; 2309 hci_connection_t * conn; 2310 2311 // Connection management 2312 reverse_bd_addr(&packet[8], addr); 2313 addr_type = (bd_addr_type_t)packet[7]; 2314 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2315 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2316 2317 #ifdef ENABLE_LE_CENTRAL 2318 // handle error: error is reported only to the initiator -> outgoing connection 2319 if (packet[3]){ 2320 2321 // handle cancelled outgoing connection 2322 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2323 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2324 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2325 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2326 // reset state 2327 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2328 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2329 // get outgoing connection conn struct for direct connect 2330 conn = gap_get_outgoing_connection(); 2331 } 2332 2333 // outgoing le connection establishment is done 2334 if (conn){ 2335 // remove entry 2336 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2337 btstack_memory_hci_connection_free( conn ); 2338 } 2339 return; 2340 } 2341 #endif 2342 2343 // on success, both hosts receive connection complete event 2344 if (packet[6] == HCI_ROLE_MASTER){ 2345 #ifdef ENABLE_LE_CENTRAL 2346 // if we're master on an le connection, it was an outgoing connection and we're done with it 2347 // note: no hci_connection_t object exists yet for connect with whitelist 2348 if (hci_is_le_connection_type(addr_type)){ 2349 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2350 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2351 } 2352 #endif 2353 } else { 2354 #ifdef ENABLE_LE_PERIPHERAL 2355 // if we're slave, it was an incoming connection, advertisements have stopped 2356 hci_stack->le_advertisements_active = false; 2357 #endif 2358 } 2359 2360 // LE connections are auto-accepted, so just create a connection if there isn't one already 2361 if (!conn){ 2362 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2363 } 2364 2365 // no memory, sorry. 2366 if (!conn){ 2367 return; 2368 } 2369 2370 conn->state = OPEN; 2371 conn->role = packet[6]; 2372 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2373 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2374 2375 #ifdef ENABLE_LE_PERIPHERAL 2376 if (packet[6] == HCI_ROLE_SLAVE){ 2377 hci_update_advertisements_enabled_for_current_roles(); 2378 } 2379 #endif 2380 2381 // init unenhanced att bearer mtu 2382 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2383 conn->att_connection.mtu_exchanged = false; 2384 2385 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2386 2387 // restart timer 2388 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2389 // btstack_run_loop_add_timer(&conn->timeout); 2390 2391 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2392 2393 hci_emit_nr_connections_changed(); 2394 } 2395 #endif 2396 2397 #ifdef ENABLE_CLASSIC 2398 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){ 2399 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2400 // LEVEL_4 is tested by l2cap 2401 // LEVEL 3 requires MITM protection -> check io capabilities if Authenticated is possible 2402 // @see: Core Spec v5.3, Vol 3, Part C, Table 5.7 2403 if (level >= LEVEL_3){ 2404 // MITM not possible without keyboard or display 2405 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2406 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2407 2408 // MITM possible if one side has keyboard and the other has keyboard or display 2409 if (io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2410 if (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY) return true; 2411 2412 // MITM not possible if one side has only display and other side has no keyboard 2413 if (io_cap_remote == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2414 if (io_cap_local == SSP_IO_CAPABILITY_DISPLAY_ONLY) return false; 2415 } 2416 // LEVEL 2 requires SSP, which is a given 2417 return true; 2418 } 2419 2420 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2421 uint16_t i; 2422 for (i=0; i < size ; i++){ 2423 if (data[i] != 0) { 2424 return false; 2425 } 2426 } 2427 return true; 2428 } 2429 2430 static void hci_ssp_assess_security_on_io_cap_request(hci_connection_t * conn){ 2431 // get requested security level 2432 gap_security_level_t requested_security_level = conn->requested_security_level; 2433 if (hci_stack->gap_secure_connections_only_mode){ 2434 requested_security_level = LEVEL_4; 2435 } 2436 2437 // assess security: LEVEL 4 requires SC 2438 // skip this preliminary test if remote features are not available yet to work around potential issue in ESP32 controller 2439 if ((requested_security_level == LEVEL_4) && 2440 ((conn->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0) && 2441 !hci_remote_sc_enabled(conn)){ 2442 log_info("Level 4 required, but SC not supported -> abort"); 2443 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2444 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2445 return; 2446 } 2447 2448 // assess security based on io capabilities 2449 if (conn->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 2450 // responder: fully validate io caps of both sides as well as OOB data 2451 bool security_possible = false; 2452 security_possible = hci_ssp_security_level_possible_for_io_cap(requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io); 2453 2454 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2455 // We assume that both Controller can reach LEVEL 4, if one side has received P-192 and the other has received P-256, 2456 // so we merge the OOB data availability 2457 uint8_t have_oob_data = conn->io_cap_response_oob_data; 2458 if (conn->classic_oob_c_192 != NULL){ 2459 have_oob_data |= 1; 2460 } 2461 if (conn->classic_oob_c_256 != NULL){ 2462 have_oob_data |= 2; 2463 } 2464 // for up to Level 3, either P-192 as well as P-256 will do 2465 // 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 2466 // if remote does not SC, we should not receive P-256 data either 2467 if ((requested_security_level <= LEVEL_3) && (have_oob_data != 0)){ 2468 security_possible = true; 2469 } 2470 // for Level 4, P-256 is needed 2471 if ((requested_security_level == LEVEL_4 && ((have_oob_data & 2) != 0))){ 2472 security_possible = true; 2473 } 2474 #endif 2475 2476 if (security_possible == false){ 2477 log_info("IOCap/OOB insufficient for level %u -> abort", requested_security_level); 2478 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2479 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2480 return; 2481 } 2482 } else { 2483 // initiator: remote io cap not yet, only check if we have ability for MITM protection if requested and OOB is not supported 2484 #ifndef ENABLE_CLASSIC_PAIRING_OOB 2485 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2486 if ((conn->requested_security_level >= LEVEL_3) && (hci_stack->ssp_io_capability >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT)){ 2487 log_info("Level 3+ required, but no input/output -> abort"); 2488 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2489 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2490 return; 2491 } 2492 #endif 2493 #endif 2494 } 2495 2496 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2497 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2498 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2499 } else { 2500 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2501 } 2502 #endif 2503 } 2504 2505 #endif 2506 2507 static void event_handler(uint8_t *packet, uint16_t size){ 2508 2509 uint16_t event_length = packet[1]; 2510 2511 // assert packet is complete 2512 if (size != (event_length + 2u)){ 2513 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2514 return; 2515 } 2516 2517 bd_addr_type_t addr_type; 2518 hci_con_handle_t handle; 2519 hci_connection_t * conn; 2520 int i; 2521 int create_connection_cmd; 2522 2523 #ifdef ENABLE_CLASSIC 2524 hci_link_type_t link_type; 2525 bd_addr_t addr; 2526 #endif 2527 2528 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2529 2530 switch (hci_event_packet_get_type(packet)) { 2531 2532 case HCI_EVENT_COMMAND_COMPLETE: 2533 handle_command_complete_event(packet, size); 2534 break; 2535 2536 case HCI_EVENT_COMMAND_STATUS: 2537 // get num cmd packets - limit to 1 to reduce complexity 2538 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2539 2540 // check command status to detected failed outgoing connections 2541 create_connection_cmd = 0; 2542 #ifdef ENABLE_CLASSIC 2543 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2544 create_connection_cmd = 1; 2545 } 2546 #endif 2547 #ifdef ENABLE_LE_CENTRAL 2548 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2549 create_connection_cmd = 1; 2550 } 2551 #endif 2552 if (create_connection_cmd) { 2553 uint8_t status = hci_event_command_status_get_status(packet); 2554 addr_type = hci_stack->outgoing_addr_type; 2555 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2556 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); 2557 2558 // reset outgoing address info 2559 memset(hci_stack->outgoing_addr, 0, 6); 2560 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2561 2562 // on error 2563 if (status != ERROR_CODE_SUCCESS){ 2564 #ifdef ENABLE_LE_CENTRAL 2565 if (hci_is_le_connection_type(addr_type)){ 2566 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2567 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2568 } 2569 #endif 2570 // error => outgoing connection failed 2571 if (conn != NULL){ 2572 hci_handle_connection_failed(conn, status); 2573 } 2574 } 2575 } 2576 2577 #ifdef ENABLE_CLASSIC 2578 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2579 uint8_t status = hci_event_command_status_get_status(packet); 2580 log_info("command status (inquiry), status %x", status); 2581 if (status == ERROR_CODE_SUCCESS) { 2582 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2583 } else { 2584 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2585 } 2586 } 2587 #endif 2588 break; 2589 2590 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2591 if (size < 3) return; 2592 uint16_t num_handles = packet[2]; 2593 if (size != (3u + num_handles * 4u)) return; 2594 uint16_t offset = 3; 2595 for (i=0; i<num_handles;i++){ 2596 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2597 offset += 2u; 2598 uint16_t num_packets = little_endian_read_16(packet, offset); 2599 offset += 2u; 2600 2601 conn = hci_connection_for_handle(handle); 2602 if (!conn){ 2603 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2604 continue; 2605 } 2606 2607 if (conn->num_packets_sent >= num_packets){ 2608 conn->num_packets_sent -= num_packets; 2609 } else { 2610 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2611 conn->num_packets_sent = 0; 2612 } 2613 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2614 2615 #ifdef ENABLE_CLASSIC 2616 // For SCO, we do the can_send_now_check here 2617 hci_notify_if_sco_can_send_now(); 2618 #endif 2619 } 2620 break; 2621 } 2622 2623 #ifdef ENABLE_CLASSIC 2624 case HCI_EVENT_INQUIRY_COMPLETE: 2625 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2626 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2627 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2628 hci_emit_event(event, sizeof(event), 1); 2629 } 2630 break; 2631 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2632 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2633 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2634 } 2635 break; 2636 case HCI_EVENT_CONNECTION_REQUEST: 2637 reverse_bd_addr(&packet[2], addr); 2638 link_type = (hci_link_type_t) packet[11]; 2639 2640 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2641 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2642 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2643 bd_addr_copy(hci_stack->decline_addr, addr); 2644 break; 2645 } 2646 2647 if (hci_stack->gap_classic_accept_callback != NULL){ 2648 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2649 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2650 bd_addr_copy(hci_stack->decline_addr, addr); 2651 break; 2652 } 2653 } 2654 2655 // TODO: eval COD 8-10 2656 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2657 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2658 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2659 if (!conn) { 2660 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2661 } 2662 if (!conn) { 2663 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2664 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2665 bd_addr_copy(hci_stack->decline_addr, addr); 2666 break; 2667 } 2668 conn->role = HCI_ROLE_SLAVE; 2669 conn->state = RECEIVED_CONNECTION_REQUEST; 2670 // store info about eSCO 2671 if (link_type == HCI_LINK_TYPE_ESCO){ 2672 conn->remote_supported_features[0] |= 1; 2673 } 2674 hci_run(); 2675 break; 2676 2677 case HCI_EVENT_CONNECTION_COMPLETE: 2678 // Connection management 2679 reverse_bd_addr(&packet[5], addr); 2680 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2681 addr_type = BD_ADDR_TYPE_ACL; 2682 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2683 if (conn) { 2684 if (!packet[2]){ 2685 conn->state = OPEN; 2686 conn->con_handle = little_endian_read_16(packet, 3); 2687 2688 // queue get remote feature 2689 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2690 2691 // queue set supervision timeout if we're master 2692 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2693 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2694 } 2695 2696 // restart timer 2697 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2698 btstack_run_loop_add_timer(&conn->timeout); 2699 2700 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2701 2702 hci_emit_nr_connections_changed(); 2703 } else { 2704 // connection failed 2705 hci_handle_connection_failed(conn, packet[2]); 2706 } 2707 } 2708 break; 2709 2710 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2711 reverse_bd_addr(&packet[5], addr); 2712 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2713 if (packet[2]){ 2714 // connection failed 2715 break; 2716 } 2717 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2718 if (!conn) { 2719 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2720 } 2721 if (!conn) { 2722 break; 2723 } 2724 conn->state = OPEN; 2725 conn->con_handle = little_endian_read_16(packet, 3); 2726 2727 #ifdef ENABLE_SCO_OVER_HCI 2728 // update SCO 2729 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2730 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2731 } 2732 // trigger can send now 2733 if (hci_have_usb_transport()){ 2734 hci_stack->sco_can_send_now = true; 2735 } 2736 #endif 2737 #ifdef HAVE_SCO_TRANSPORT 2738 // configure sco transport 2739 if (hci_stack->sco_transport != NULL){ 2740 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2741 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2742 } 2743 #endif 2744 break; 2745 2746 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2747 handle = little_endian_read_16(packet, 3); 2748 conn = hci_connection_for_handle(handle); 2749 if (!conn) break; 2750 if (!packet[2]){ 2751 const uint8_t * features = &packet[5]; 2752 hci_handle_remote_features_page_0(conn, features); 2753 2754 // read extended features if possible 2755 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2756 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2757 break; 2758 } 2759 } 2760 hci_handle_remote_features_received(conn); 2761 break; 2762 2763 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2764 handle = little_endian_read_16(packet, 3); 2765 conn = hci_connection_for_handle(handle); 2766 if (!conn) break; 2767 // status = ok, page = 1 2768 if (!packet[2]) { 2769 uint8_t page_number = packet[5]; 2770 uint8_t maximum_page_number = packet[6]; 2771 const uint8_t * features = &packet[7]; 2772 bool done = false; 2773 switch (page_number){ 2774 case 1: 2775 hci_handle_remote_features_page_1(conn, features); 2776 if (maximum_page_number >= 2){ 2777 // get Secure Connections (Controller) from Page 2 if available 2778 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2779 } else { 2780 // otherwise, assume SC (Controller) == SC (Host) 2781 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2782 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2783 } 2784 done = true; 2785 } 2786 break; 2787 case 2: 2788 hci_handle_remote_features_page_2(conn, features); 2789 done = true; 2790 break; 2791 default: 2792 break; 2793 } 2794 if (!done) break; 2795 } 2796 hci_handle_remote_features_received(conn); 2797 break; 2798 2799 case HCI_EVENT_LINK_KEY_REQUEST: 2800 // request handled by hci_run() 2801 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2802 break; 2803 2804 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2805 hci_event_link_key_request_get_bd_addr(packet, addr); 2806 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2807 if (!conn) break; 2808 2809 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2810 2811 // CVE-2020-26555: ignore NULL link key 2812 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2813 if (btstack_is_null(&packet[8], 16)) break; 2814 2815 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2816 // Change Connection Encryption keeps link key type 2817 if (link_key_type != CHANGED_COMBINATION_KEY){ 2818 conn->link_key_type = link_key_type; 2819 } 2820 2821 // cache link key. link keys stored in little-endian format for legacy reasons 2822 memcpy(&conn->link_key, &packet[8], 16); 2823 2824 // only store link key: 2825 // - if bondable enabled 2826 if (hci_stack->bondable == false) break; 2827 // - if security level sufficient 2828 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2829 // - for SSP, also check if remote side requested bonding as well 2830 if (conn->link_key_type != COMBINATION_KEY){ 2831 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2832 if (!remote_bonding){ 2833 break; 2834 } 2835 } 2836 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2837 break; 2838 } 2839 2840 case HCI_EVENT_PIN_CODE_REQUEST: 2841 hci_event_pin_code_request_get_bd_addr(packet, addr); 2842 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2843 if (!conn) break; 2844 2845 hci_pairing_started(conn, false); 2846 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2847 if (!hci_stack->bondable ){ 2848 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2849 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2850 hci_run(); 2851 return; 2852 } 2853 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2854 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2855 log_info("Level 4 required, but SC not supported -> abort"); 2856 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2857 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2858 hci_run(); 2859 return; 2860 } 2861 break; 2862 2863 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2864 hci_event_io_capability_response_get_bd_addr(packet, addr); 2865 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2866 if (!conn) break; 2867 2868 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2869 hci_pairing_started(conn, true); 2870 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2871 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2872 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2873 conn->io_cap_response_oob_data = hci_event_io_capability_response_get_oob_data_present(packet); 2874 #endif 2875 break; 2876 2877 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2878 hci_event_io_capability_response_get_bd_addr(packet, addr); 2879 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2880 if (!conn) break; 2881 2882 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 2883 hci_connection_timestamp(conn); 2884 hci_pairing_started(conn, true); 2885 break; 2886 2887 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2888 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2889 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2890 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2891 if (!conn) break; 2892 2893 hci_connection_timestamp(conn); 2894 2895 hci_pairing_started(conn, true); 2896 2897 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2898 break; 2899 #endif 2900 2901 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2902 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2903 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2904 if (!conn) break; 2905 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2906 if (hci_stack->ssp_auto_accept){ 2907 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2908 }; 2909 } else { 2910 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2911 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2912 // don't forward event to app 2913 hci_run(); 2914 return; 2915 } 2916 break; 2917 2918 case HCI_EVENT_USER_PASSKEY_REQUEST: 2919 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2920 if (hci_stack->ssp_auto_accept){ 2921 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2922 }; 2923 break; 2924 2925 case HCI_EVENT_MODE_CHANGE: 2926 handle = hci_event_mode_change_get_handle(packet); 2927 conn = hci_connection_for_handle(handle); 2928 if (!conn) break; 2929 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2930 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2931 break; 2932 #endif 2933 2934 case HCI_EVENT_ENCRYPTION_CHANGE: 2935 handle = hci_event_encryption_change_get_connection_handle(packet); 2936 conn = hci_connection_for_handle(handle); 2937 if (!conn) break; 2938 if (hci_event_encryption_change_get_status(packet) == 0u) { 2939 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2940 if (encryption_enabled){ 2941 if (hci_is_le_connection(conn)){ 2942 // For LE, we accept connection as encrypted 2943 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2944 } 2945 #ifdef ENABLE_CLASSIC 2946 else { 2947 2948 // dedicated bonding: send result and disconnect 2949 if (conn->bonding_flags & BONDING_DEDICATED){ 2950 conn->bonding_flags &= ~BONDING_DEDICATED; 2951 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2952 conn->bonding_status = packet[2]; 2953 break; 2954 } 2955 2956 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2957 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2958 bool connected_uses_aes_ccm = encryption_enabled == 2; 2959 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2960 log_info("SC during pairing, but only E0 now -> abort"); 2961 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2962 break; 2963 } 2964 2965 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2966 if (connected_uses_aes_ccm){ 2967 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2968 } 2969 2970 #ifdef ENABLE_TESTING_SUPPORT 2971 // work around for issue with PTS dongle 2972 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2973 #endif 2974 2975 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2976 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2977 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2978 } else { 2979 // if not, pretend everything is perfect 2980 hci_handle_read_encryption_key_size_complete(conn, 16); 2981 } 2982 } 2983 #endif 2984 } else { 2985 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2986 } 2987 } 2988 2989 break; 2990 2991 #ifdef ENABLE_CLASSIC 2992 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2993 handle = hci_event_authentication_complete_get_connection_handle(packet); 2994 conn = hci_connection_for_handle(handle); 2995 if (!conn) break; 2996 2997 // clear authentication active flag 2998 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2999 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 3000 3001 // authenticated only if auth status == 0 3002 if (hci_event_authentication_complete_get_status(packet) == 0){ 3003 // authenticated 3004 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3005 3006 // If not already encrypted, start encryption 3007 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 3008 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 3009 break; 3010 } 3011 } 3012 3013 // emit updated security level 3014 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 3015 break; 3016 3017 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 3018 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 3019 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 3020 if (!conn) break; 3021 3022 // treat successfully paired connection as authenticated 3023 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 3024 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 3025 } 3026 3027 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 3028 break; 3029 #endif 3030 3031 // HCI_EVENT_DISCONNECTION_COMPLETE 3032 // has been split, to first notify stack before shutting connection down 3033 // see end of function, too. 3034 case HCI_EVENT_DISCONNECTION_COMPLETE: 3035 if (packet[2]) break; // status != 0 3036 handle = little_endian_read_16(packet, 3); 3037 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 3038 if (hci_stack->acl_fragmentation_total_size > 0u) { 3039 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 3040 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 3041 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 3042 hci_stack->acl_fragmentation_total_size = 0; 3043 hci_stack->acl_fragmentation_pos = 0; 3044 if (release_buffer){ 3045 hci_release_packet_buffer(); 3046 } 3047 } 3048 } 3049 3050 conn = hci_connection_for_handle(handle); 3051 if (!conn) break; 3052 #ifdef ENABLE_CLASSIC 3053 // pairing failed if it was ongoing 3054 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 3055 #endif 3056 // mark connection for shutdown 3057 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3058 3059 // emit dedicatd bonding event 3060 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3061 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3062 } 3063 3064 #ifdef ENABLE_BLE 3065 #ifdef ENABLE_LE_PERIPHERAL 3066 // re-enable advertisements for le connections if active 3067 if (hci_is_le_connection(conn)){ 3068 hci_update_advertisements_enabled_for_current_roles(); 3069 } 3070 #endif 3071 #endif 3072 break; 3073 3074 case HCI_EVENT_HARDWARE_ERROR: 3075 log_error("Hardware Error: 0x%02x", packet[2]); 3076 if (hci_stack->hardware_error_callback){ 3077 (*hci_stack->hardware_error_callback)(packet[2]); 3078 } else { 3079 // if no special requests, just reboot stack 3080 hci_power_control_off(); 3081 hci_power_control_on(); 3082 } 3083 break; 3084 3085 #ifdef ENABLE_CLASSIC 3086 case HCI_EVENT_ROLE_CHANGE: 3087 if (packet[2]) break; // status != 0 3088 reverse_bd_addr(&packet[3], addr); 3089 addr_type = BD_ADDR_TYPE_ACL; 3090 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3091 if (!conn) break; 3092 conn->role = packet[9]; 3093 break; 3094 #endif 3095 3096 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3097 // release packet buffer only for asynchronous transport and if there are not further fragements 3098 if (hci_transport_synchronous()) { 3099 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3100 return; // instead of break: to avoid re-entering hci_run() 3101 } 3102 hci_stack->acl_fragmentation_tx_active = 0; 3103 if (hci_stack->acl_fragmentation_total_size) break; 3104 hci_release_packet_buffer(); 3105 3106 // L2CAP receives this event via the hci_emit_event below 3107 3108 #ifdef ENABLE_CLASSIC 3109 // For SCO, we do the can_send_now_check here 3110 hci_notify_if_sco_can_send_now(); 3111 #endif 3112 break; 3113 3114 #ifdef ENABLE_CLASSIC 3115 case HCI_EVENT_SCO_CAN_SEND_NOW: 3116 // For SCO, we do the can_send_now_check here 3117 hci_stack->sco_can_send_now = true; 3118 hci_notify_if_sco_can_send_now(); 3119 return; 3120 3121 // explode inquriy results for easier consumption 3122 case HCI_EVENT_INQUIRY_RESULT: 3123 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3124 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3125 gap_inquiry_explode(packet, size); 3126 break; 3127 #endif 3128 3129 #ifdef ENABLE_BLE 3130 case HCI_EVENT_LE_META: 3131 switch (packet[2]){ 3132 #ifdef ENABLE_LE_CENTRAL 3133 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3134 // log_info("advertising report received"); 3135 if (!hci_stack->le_scanning_enabled) break; 3136 le_handle_advertisement_report(packet, size); 3137 break; 3138 #endif 3139 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3140 event_handle_le_connection_complete(packet); 3141 break; 3142 3143 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3144 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3145 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3146 conn = hci_connection_for_handle(handle); 3147 if (!conn) break; 3148 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3149 break; 3150 3151 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3152 // connection 3153 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3154 conn = hci_connection_for_handle(handle); 3155 if (conn) { 3156 // read arguments 3157 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3158 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3159 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3160 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3161 3162 // validate against current connection parameter range 3163 le_connection_parameter_range_t existing_range; 3164 gap_get_connection_parameter_range(&existing_range); 3165 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3166 if (update_parameter){ 3167 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3168 conn->le_conn_interval_min = le_conn_interval_min; 3169 conn->le_conn_interval_max = le_conn_interval_max; 3170 conn->le_conn_latency = le_conn_latency; 3171 conn->le_supervision_timeout = le_supervision_timeout; 3172 } else { 3173 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3174 } 3175 } 3176 break; 3177 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3178 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3179 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3180 conn = hci_connection_for_handle(handle); 3181 if (conn) { 3182 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3183 } 3184 break; 3185 #endif 3186 default: 3187 break; 3188 } 3189 break; 3190 #endif 3191 case HCI_EVENT_VENDOR_SPECIFIC: 3192 // Vendor specific commands often create vendor specific event instead of num completed packets 3193 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3194 switch (hci_stack->manufacturer){ 3195 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3196 hci_stack->num_cmd_packets = 1; 3197 break; 3198 default: 3199 break; 3200 } 3201 break; 3202 default: 3203 break; 3204 } 3205 3206 handle_event_for_current_stack_state(packet, size); 3207 3208 // notify upper stack 3209 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3210 3211 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3212 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3213 handle = little_endian_read_16(packet, 3); 3214 hci_connection_t * aConn = hci_connection_for_handle(handle); 3215 // discard connection if app did not trigger a reconnect in the event handler 3216 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3217 hci_shutdown_connection(aConn); 3218 } 3219 } 3220 3221 // execute main loop 3222 hci_run(); 3223 } 3224 3225 #ifdef ENABLE_CLASSIC 3226 3227 #ifdef ENABLE_SCO_OVER_HCI 3228 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3229 static void sco_schedule_tx(hci_connection_t * conn); 3230 3231 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3232 log_debug("SCO TX Timeout"); 3233 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3234 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3235 if (!conn) return; 3236 3237 // trigger send 3238 conn->sco_tx_ready = 1; 3239 // extra packet if CVSD but SCO buffer is too short 3240 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3241 conn->sco_tx_ready++; 3242 } 3243 hci_notify_if_sco_can_send_now(); 3244 } 3245 3246 3247 #define SCO_TX_AFTER_RX_MS (6) 3248 3249 static void sco_schedule_tx(hci_connection_t * conn){ 3250 3251 uint32_t now = btstack_run_loop_get_time_ms(); 3252 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3253 int time_delta_ms = sco_tx_ms - now; 3254 3255 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3256 3257 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3258 btstack_run_loop_remove_timer(timer); 3259 btstack_run_loop_set_timer(timer, time_delta_ms); 3260 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3261 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3262 btstack_run_loop_add_timer(timer); 3263 } 3264 #endif 3265 3266 static void sco_handler(uint8_t * packet, uint16_t size){ 3267 // lookup connection struct 3268 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3269 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3270 if (!conn) return; 3271 3272 #ifdef ENABLE_SCO_OVER_HCI 3273 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3274 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3275 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3276 packet[2] = 0x3c; 3277 memmove(&packet[3], &packet[23], 63); 3278 size = 63; 3279 } 3280 } 3281 3282 if (hci_have_usb_transport()){ 3283 // Nothing to do 3284 } else { 3285 // 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); 3286 if (hci_stack->synchronous_flow_control_enabled == 0){ 3287 uint32_t now = btstack_run_loop_get_time_ms(); 3288 3289 if (!conn->sco_rx_valid){ 3290 // ignore first 10 packets 3291 conn->sco_rx_count++; 3292 // log_debug("sco rx count %u", conn->sco_rx_count); 3293 if (conn->sco_rx_count == 10) { 3294 // use first timestamp as is and pretent it just started 3295 conn->sco_rx_ms = now; 3296 conn->sco_rx_valid = 1; 3297 conn->sco_rx_count = 0; 3298 sco_schedule_tx(conn); 3299 } 3300 } else { 3301 // track expected arrival timme 3302 conn->sco_rx_count++; 3303 conn->sco_rx_ms += 7; 3304 int delta = (int32_t) (now - conn->sco_rx_ms); 3305 if (delta > 0){ 3306 conn->sco_rx_ms++; 3307 } 3308 // log_debug("sco rx %u", conn->sco_rx_ms); 3309 sco_schedule_tx(conn); 3310 } 3311 } 3312 } 3313 #endif 3314 3315 // deliver to app 3316 if (hci_stack->sco_packet_handler) { 3317 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3318 } 3319 3320 #ifdef HAVE_SCO_TRANSPORT 3321 // We can send one packet for each received packet 3322 conn->sco_tx_ready++; 3323 hci_notify_if_sco_can_send_now(); 3324 #endif 3325 3326 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3327 conn->num_packets_completed++; 3328 hci_stack->host_completed_packets = 1; 3329 hci_run(); 3330 #endif 3331 } 3332 #endif 3333 3334 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3335 hci_dump_packet(packet_type, 1, packet, size); 3336 switch (packet_type) { 3337 case HCI_EVENT_PACKET: 3338 event_handler(packet, size); 3339 break; 3340 case HCI_ACL_DATA_PACKET: 3341 acl_handler(packet, size); 3342 break; 3343 #ifdef ENABLE_CLASSIC 3344 case HCI_SCO_DATA_PACKET: 3345 sco_handler(packet, size); 3346 break; 3347 #endif 3348 default: 3349 break; 3350 } 3351 } 3352 3353 /** 3354 * @brief Add event packet handler. 3355 */ 3356 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3357 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3358 } 3359 3360 3361 /** Register HCI packet handlers */ 3362 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3363 hci_stack->acl_packet_handler = handler; 3364 } 3365 3366 #ifdef ENABLE_CLASSIC 3367 /** 3368 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3369 */ 3370 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3371 hci_stack->sco_packet_handler = handler; 3372 } 3373 #endif 3374 3375 static void hci_state_reset(void){ 3376 // no connections yet 3377 hci_stack->connections = NULL; 3378 3379 // keep discoverable/connectable as this has been requested by the client(s) 3380 // hci_stack->discoverable = 0; 3381 // hci_stack->connectable = 0; 3382 // hci_stack->bondable = 1; 3383 // hci_stack->own_addr_type = 0; 3384 3385 // buffer is free 3386 hci_stack->hci_packet_buffer_reserved = false; 3387 3388 // no pending cmds 3389 hci_stack->decline_reason = 0; 3390 hci_stack->new_scan_enable_value = 0xff; 3391 3392 hci_stack->secure_connections_active = false; 3393 3394 #ifdef ENABLE_CLASSIC 3395 hci_stack->new_page_scan_interval = 0xffff; 3396 hci_stack->new_page_scan_window = 0xffff; 3397 hci_stack->new_page_scan_type = 0xff; 3398 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3399 hci_stack->gap_tasks = 3400 GAP_TASK_SET_DEFAULT_LINK_POLICY | 3401 GAP_TASK_SET_CLASS_OF_DEVICE | 3402 GAP_TASK_SET_LOCAL_NAME | 3403 GAP_TASK_SET_EIR_DATA; 3404 #endif 3405 3406 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3407 hci_stack->classic_read_local_oob_data = true; 3408 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3409 #endif 3410 3411 // LE 3412 #ifdef ENABLE_BLE 3413 memset(hci_stack->le_random_address, 0, 6); 3414 hci_stack->le_random_address_set = 0; 3415 #endif 3416 #ifdef ENABLE_LE_CENTRAL 3417 hci_stack->le_scanning_active = false; 3418 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3419 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3420 hci_stack->le_whitelist_capacity = 0; 3421 #endif 3422 #ifdef ENABLE_LE_PERIPHERAL 3423 hci_stack->le_advertisements_active = false; 3424 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3425 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3426 } 3427 if (hci_stack->le_advertisements_data != NULL){ 3428 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3429 } 3430 #endif 3431 } 3432 3433 #ifdef ENABLE_CLASSIC 3434 /** 3435 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3436 */ 3437 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3438 // store and open remote device db 3439 hci_stack->link_key_db = link_key_db; 3440 if (hci_stack->link_key_db) { 3441 hci_stack->link_key_db->open(); 3442 } 3443 } 3444 #endif 3445 3446 void hci_init(const hci_transport_t *transport, const void *config){ 3447 3448 #ifdef HAVE_MALLOC 3449 if (!hci_stack) { 3450 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3451 } 3452 #else 3453 hci_stack = &hci_stack_static; 3454 #endif 3455 memset(hci_stack, 0, sizeof(hci_stack_t)); 3456 3457 // reference to use transport layer implementation 3458 hci_stack->hci_transport = transport; 3459 3460 // reference to used config 3461 hci_stack->config = config; 3462 3463 // setup pointer for outgoing packet buffer 3464 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3465 3466 // max acl payload size defined in config.h 3467 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3468 3469 // register packet handlers with transport 3470 transport->register_packet_handler(&packet_handler); 3471 3472 hci_stack->state = HCI_STATE_OFF; 3473 3474 // class of device 3475 hci_stack->class_of_device = 0x007a020c; // Smartphone 3476 3477 // bondable by default 3478 hci_stack->bondable = 1; 3479 3480 #ifdef ENABLE_CLASSIC 3481 // classic name 3482 hci_stack->local_name = default_classic_name; 3483 3484 // Master slave policy 3485 hci_stack->master_slave_policy = 1; 3486 3487 // Allow Role Switch 3488 hci_stack->allow_role_switch = 1; 3489 3490 // Default / minimum security level = 2 3491 hci_stack->gap_security_level = LEVEL_2; 3492 3493 // Default Security Mode 4 3494 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3495 3496 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3497 hci_stack->gap_required_encyrption_key_size = 7; 3498 3499 // Link Supervision Timeout 3500 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3501 3502 #endif 3503 3504 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3505 hci_stack->ssp_enable = 1; 3506 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3507 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3508 hci_stack->ssp_auto_accept = 1; 3509 3510 // Secure Connections: enable (requires support from Controller) 3511 hci_stack->secure_connections_enable = true; 3512 3513 // voice setting - signed 16 bit pcm data with CVSD over the air 3514 hci_stack->sco_voice_setting = 0x60; 3515 3516 #ifdef ENABLE_LE_CENTRAL 3517 // connection parameter to use for outgoing connections 3518 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3519 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3520 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3521 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3522 hci_stack->le_connection_latency = 4; // 4 3523 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3524 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3525 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3526 3527 // default LE Scanning 3528 hci_stack->le_scan_type = 0x1; // active 3529 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3530 hci_stack->le_scan_window = 0x30; // 30 ms 3531 #endif 3532 3533 #ifdef ENABLE_LE_PERIPHERAL 3534 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3535 #endif 3536 3537 // connection parameter range used to answer connection parameter update requests in l2cap 3538 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3539 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3540 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3541 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3542 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3543 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3544 3545 hci_state_reset(); 3546 } 3547 3548 void hci_deinit(void){ 3549 #ifdef HAVE_MALLOC 3550 if (hci_stack) { 3551 free(hci_stack); 3552 } 3553 #endif 3554 hci_stack = NULL; 3555 3556 #ifdef ENABLE_CLASSIC 3557 disable_l2cap_timeouts = 0; 3558 #endif 3559 } 3560 3561 /** 3562 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3563 */ 3564 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3565 hci_stack->chipset = chipset_driver; 3566 3567 // reset chipset driver - init is also called on power_up 3568 if (hci_stack->chipset && hci_stack->chipset->init){ 3569 hci_stack->chipset->init(hci_stack->config); 3570 } 3571 } 3572 3573 /** 3574 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3575 */ 3576 void hci_set_control(const btstack_control_t *hardware_control){ 3577 // references to used control implementation 3578 hci_stack->control = hardware_control; 3579 // init with transport config 3580 hardware_control->init(hci_stack->config); 3581 } 3582 3583 void hci_close(void){ 3584 3585 #ifdef ENABLE_CLASSIC 3586 // close remote device db 3587 if (hci_stack->link_key_db) { 3588 hci_stack->link_key_db->close(); 3589 } 3590 #endif 3591 3592 btstack_linked_list_iterator_t lit; 3593 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3594 while (btstack_linked_list_iterator_has_next(&lit)){ 3595 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3596 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3597 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3598 hci_shutdown_connection(connection); 3599 } 3600 3601 hci_power_control(HCI_POWER_OFF); 3602 3603 #ifdef HAVE_MALLOC 3604 free(hci_stack); 3605 #endif 3606 hci_stack = NULL; 3607 } 3608 3609 #ifdef HAVE_SCO_TRANSPORT 3610 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3611 hci_stack->sco_transport = sco_transport; 3612 sco_transport->register_packet_handler(&packet_handler); 3613 } 3614 #endif 3615 3616 #ifdef ENABLE_CLASSIC 3617 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3618 // validate ranage and set 3619 if (encryption_key_size < 7) return; 3620 if (encryption_key_size > 16) return; 3621 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3622 } 3623 3624 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3625 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3626 hci_stack->gap_security_mode = security_mode; 3627 return ERROR_CODE_SUCCESS; 3628 } else { 3629 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3630 } 3631 } 3632 3633 gap_security_mode_t gap_get_security_mode(void){ 3634 return hci_stack->gap_security_mode; 3635 } 3636 3637 void gap_set_security_level(gap_security_level_t security_level){ 3638 hci_stack->gap_security_level = security_level; 3639 } 3640 3641 gap_security_level_t gap_get_security_level(void){ 3642 if (hci_stack->gap_secure_connections_only_mode){ 3643 return LEVEL_4; 3644 } 3645 return hci_stack->gap_security_level; 3646 } 3647 3648 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3649 hci_stack->gap_minimal_service_security_level = security_level; 3650 } 3651 3652 void gap_set_secure_connections_only_mode(bool enable){ 3653 hci_stack->gap_secure_connections_only_mode = enable; 3654 } 3655 3656 bool gap_get_secure_connections_only_mode(void){ 3657 return hci_stack->gap_secure_connections_only_mode; 3658 } 3659 #endif 3660 3661 #ifdef ENABLE_CLASSIC 3662 void gap_set_class_of_device(uint32_t class_of_device){ 3663 hci_stack->class_of_device = class_of_device; 3664 hci_stack->gap_tasks |= GAP_TASK_SET_CLASS_OF_DEVICE; 3665 hci_run(); 3666 } 3667 3668 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3669 hci_stack->default_link_policy_settings = default_link_policy_settings; 3670 hci_stack->gap_tasks |= GAP_TASK_SET_DEFAULT_LINK_POLICY; 3671 hci_run(); 3672 } 3673 3674 void gap_set_allow_role_switch(bool allow_role_switch){ 3675 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3676 } 3677 3678 uint8_t hci_get_allow_role_switch(void){ 3679 return hci_stack->allow_role_switch; 3680 } 3681 3682 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3683 hci_stack->link_supervision_timeout = link_supervision_timeout; 3684 } 3685 3686 void hci_disable_l2cap_timeout_check(void){ 3687 disable_l2cap_timeouts = 1; 3688 } 3689 #endif 3690 3691 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3692 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3693 void hci_set_bd_addr(bd_addr_t addr){ 3694 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3695 hci_stack->custom_bd_addr_set = 1; 3696 } 3697 #endif 3698 3699 // State-Module-Driver overview 3700 // state module low-level 3701 // HCI_STATE_OFF off close 3702 // HCI_STATE_INITIALIZING, on open 3703 // HCI_STATE_WORKING, on open 3704 // HCI_STATE_HALTING, on open 3705 // HCI_STATE_SLEEPING, off/sleep close 3706 // HCI_STATE_FALLING_ASLEEP on open 3707 3708 static int hci_power_control_on(void){ 3709 3710 // power on 3711 int err = 0; 3712 if (hci_stack->control && hci_stack->control->on){ 3713 err = (*hci_stack->control->on)(); 3714 } 3715 if (err){ 3716 log_error( "POWER_ON failed"); 3717 hci_emit_hci_open_failed(); 3718 return err; 3719 } 3720 3721 // int chipset driver 3722 if (hci_stack->chipset && hci_stack->chipset->init){ 3723 hci_stack->chipset->init(hci_stack->config); 3724 } 3725 3726 // init transport 3727 if (hci_stack->hci_transport->init){ 3728 hci_stack->hci_transport->init(hci_stack->config); 3729 } 3730 3731 // open transport 3732 err = hci_stack->hci_transport->open(); 3733 if (err){ 3734 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3735 if (hci_stack->control && hci_stack->control->off){ 3736 (*hci_stack->control->off)(); 3737 } 3738 hci_emit_hci_open_failed(); 3739 return err; 3740 } 3741 return 0; 3742 } 3743 3744 static void hci_power_control_off(void){ 3745 3746 log_info("hci_power_control_off"); 3747 3748 // close low-level device 3749 hci_stack->hci_transport->close(); 3750 3751 log_info("hci_power_control_off - hci_transport closed"); 3752 3753 // power off 3754 if (hci_stack->control && hci_stack->control->off){ 3755 (*hci_stack->control->off)(); 3756 } 3757 3758 log_info("hci_power_control_off - control closed"); 3759 3760 hci_stack->state = HCI_STATE_OFF; 3761 } 3762 3763 static void hci_power_control_sleep(void){ 3764 3765 log_info("hci_power_control_sleep"); 3766 3767 #if 0 3768 // don't close serial port during sleep 3769 3770 // close low-level device 3771 hci_stack->hci_transport->close(hci_stack->config); 3772 #endif 3773 3774 // sleep mode 3775 if (hci_stack->control && hci_stack->control->sleep){ 3776 (*hci_stack->control->sleep)(); 3777 } 3778 3779 hci_stack->state = HCI_STATE_SLEEPING; 3780 } 3781 3782 static int hci_power_control_wake(void){ 3783 3784 log_info("hci_power_control_wake"); 3785 3786 // wake on 3787 if (hci_stack->control && hci_stack->control->wake){ 3788 (*hci_stack->control->wake)(); 3789 } 3790 3791 #if 0 3792 // open low-level device 3793 int err = hci_stack->hci_transport->open(hci_stack->config); 3794 if (err){ 3795 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3796 if (hci_stack->control && hci_stack->control->off){ 3797 (*hci_stack->control->off)(); 3798 } 3799 hci_emit_hci_open_failed(); 3800 return err; 3801 } 3802 #endif 3803 3804 return 0; 3805 } 3806 3807 static void hci_power_transition_to_initializing(void){ 3808 // set up state machine 3809 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3810 hci_stack->hci_packet_buffer_reserved = false; 3811 hci_stack->state = HCI_STATE_INITIALIZING; 3812 hci_stack->substate = HCI_INIT_SEND_RESET; 3813 } 3814 3815 // returns error 3816 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3817 int err; 3818 switch (power_mode){ 3819 case HCI_POWER_ON: 3820 err = hci_power_control_on(); 3821 if (err != 0) { 3822 log_error("hci_power_control_on() error %d", err); 3823 return err; 3824 } 3825 hci_power_transition_to_initializing(); 3826 break; 3827 case HCI_POWER_OFF: 3828 // do nothing 3829 break; 3830 case HCI_POWER_SLEEP: 3831 // do nothing (with SLEEP == OFF) 3832 break; 3833 default: 3834 btstack_assert(false); 3835 break; 3836 } 3837 return ERROR_CODE_SUCCESS; 3838 } 3839 3840 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3841 switch (power_mode){ 3842 case HCI_POWER_ON: 3843 // do nothing 3844 break; 3845 case HCI_POWER_OFF: 3846 // no connections yet, just turn it off 3847 hci_power_control_off(); 3848 break; 3849 case HCI_POWER_SLEEP: 3850 // no connections yet, just turn it off 3851 hci_power_control_sleep(); 3852 break; 3853 default: 3854 btstack_assert(false); 3855 break; 3856 } 3857 return ERROR_CODE_SUCCESS; 3858 } 3859 3860 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3861 switch (power_mode){ 3862 case HCI_POWER_ON: 3863 // do nothing 3864 break; 3865 case HCI_POWER_OFF: 3866 // see hci_run 3867 hci_stack->state = HCI_STATE_HALTING; 3868 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3869 break; 3870 case HCI_POWER_SLEEP: 3871 // see hci_run 3872 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3873 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3874 break; 3875 default: 3876 btstack_assert(false); 3877 break; 3878 } 3879 return ERROR_CODE_SUCCESS; 3880 } 3881 3882 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3883 switch (power_mode){ 3884 case HCI_POWER_ON: 3885 hci_power_transition_to_initializing(); 3886 break; 3887 case HCI_POWER_OFF: 3888 // do nothing 3889 break; 3890 case HCI_POWER_SLEEP: 3891 // see hci_run 3892 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3893 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3894 break; 3895 default: 3896 btstack_assert(false); 3897 break; 3898 } 3899 return ERROR_CODE_SUCCESS; 3900 } 3901 3902 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3903 switch (power_mode){ 3904 case HCI_POWER_ON: 3905 3906 #ifdef HAVE_PLATFORM_IPHONE_OS 3907 // nothing to do, if H4 supports power management 3908 if (btstack_control_iphone_power_management_enabled()){ 3909 hci_stack->state = HCI_STATE_INITIALIZING; 3910 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3911 break; 3912 } 3913 #endif 3914 hci_power_transition_to_initializing(); 3915 break; 3916 case HCI_POWER_OFF: 3917 // see hci_run 3918 hci_stack->state = HCI_STATE_HALTING; 3919 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3920 break; 3921 case HCI_POWER_SLEEP: 3922 // do nothing 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_sleeping(HCI_POWER_MODE power_mode) { 3932 int err; 3933 switch (power_mode){ 3934 case HCI_POWER_ON: 3935 #ifdef HAVE_PLATFORM_IPHONE_OS 3936 // nothing to do, if H4 supports power management 3937 if (btstack_control_iphone_power_management_enabled()){ 3938 hci_stack->state = HCI_STATE_INITIALIZING; 3939 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3940 hci_update_scan_enable(); 3941 break; 3942 } 3943 #endif 3944 err = hci_power_control_wake(); 3945 if (err) return err; 3946 hci_power_transition_to_initializing(); 3947 break; 3948 case HCI_POWER_OFF: 3949 hci_stack->state = HCI_STATE_HALTING; 3950 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3951 break; 3952 case HCI_POWER_SLEEP: 3953 // do nothing 3954 break; 3955 default: 3956 btstack_assert(false); 3957 break; 3958 } 3959 return ERROR_CODE_SUCCESS; 3960 } 3961 3962 int hci_power_control(HCI_POWER_MODE power_mode){ 3963 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3964 int err = 0; 3965 switch (hci_stack->state){ 3966 case HCI_STATE_OFF: 3967 err = hci_power_control_state_off(power_mode); 3968 break; 3969 case HCI_STATE_INITIALIZING: 3970 err = hci_power_control_state_initializing(power_mode); 3971 break; 3972 case HCI_STATE_WORKING: 3973 err = hci_power_control_state_working(power_mode); 3974 break; 3975 case HCI_STATE_HALTING: 3976 err = hci_power_control_state_halting(power_mode); 3977 break; 3978 case HCI_STATE_FALLING_ASLEEP: 3979 err = hci_power_control_state_falling_asleep(power_mode); 3980 break; 3981 case HCI_STATE_SLEEPING: 3982 err = hci_power_control_state_sleeping(power_mode); 3983 break; 3984 default: 3985 btstack_assert(false); 3986 break; 3987 } 3988 if (err != 0){ 3989 return err; 3990 } 3991 3992 // create internal event 3993 hci_emit_state(); 3994 3995 // trigger next/first action 3996 hci_run(); 3997 3998 return 0; 3999 } 4000 4001 4002 #ifdef ENABLE_CLASSIC 4003 4004 static void hci_update_scan_enable(void){ 4005 // 2 = page scan, 1 = inq scan 4006 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 4007 hci_run(); 4008 } 4009 4010 void gap_discoverable_control(uint8_t enable){ 4011 if (enable) enable = 1; // normalize argument 4012 4013 if (hci_stack->discoverable == enable){ 4014 hci_emit_discoverable_enabled(hci_stack->discoverable); 4015 return; 4016 } 4017 4018 hci_stack->discoverable = enable; 4019 hci_update_scan_enable(); 4020 } 4021 4022 void gap_connectable_control(uint8_t enable){ 4023 if (enable) enable = 1; // normalize argument 4024 4025 // don't emit event 4026 if (hci_stack->connectable == enable) return; 4027 4028 hci_stack->connectable = enable; 4029 hci_update_scan_enable(); 4030 } 4031 #endif 4032 4033 void gap_local_bd_addr(bd_addr_t address_buffer){ 4034 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 4035 } 4036 4037 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4038 static void hci_host_num_completed_packets(void){ 4039 4040 // create packet manually as arrays are not supported and num_commands should not get reduced 4041 hci_reserve_packet_buffer(); 4042 uint8_t * packet = hci_get_outgoing_packet_buffer(); 4043 4044 uint16_t size = 0; 4045 uint16_t num_handles = 0; 4046 packet[size++] = 0x35; 4047 packet[size++] = 0x0c; 4048 size++; // skip param len 4049 size++; // skip num handles 4050 4051 // add { handle, packets } entries 4052 btstack_linked_item_t * it; 4053 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 4054 hci_connection_t * connection = (hci_connection_t *) it; 4055 if (connection->num_packets_completed){ 4056 little_endian_store_16(packet, size, connection->con_handle); 4057 size += 2; 4058 little_endian_store_16(packet, size, connection->num_packets_completed); 4059 size += 2; 4060 // 4061 num_handles++; 4062 connection->num_packets_completed = 0; 4063 } 4064 } 4065 4066 packet[2] = size - 3; 4067 packet[3] = num_handles; 4068 4069 hci_stack->host_completed_packets = 0; 4070 4071 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4072 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4073 4074 // release packet buffer for synchronous transport implementations 4075 if (hci_transport_synchronous()){ 4076 hci_release_packet_buffer(); 4077 hci_emit_transport_packet_sent(); 4078 } 4079 } 4080 #endif 4081 4082 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4083 UNUSED(ds); 4084 hci_stack->substate = HCI_HALTING_CLOSE; 4085 // allow packet handlers to defer final shutdown 4086 hci_emit_state(); 4087 hci_run(); 4088 } 4089 4090 static bool hci_run_acl_fragments(void){ 4091 if (hci_stack->acl_fragmentation_total_size > 0u) { 4092 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4093 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4094 if (connection) { 4095 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4096 hci_send_acl_packet_fragments(connection); 4097 return true; 4098 } 4099 } else { 4100 // connection gone -> discard further fragments 4101 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4102 hci_stack->acl_fragmentation_total_size = 0; 4103 hci_stack->acl_fragmentation_pos = 0; 4104 } 4105 } 4106 return false; 4107 } 4108 4109 #ifdef ENABLE_CLASSIC 4110 static bool hci_run_general_gap_classic(void){ 4111 4112 // assert stack is working and classic is active 4113 if (hci_classic_supported() == false) return false; 4114 if (hci_stack->state != HCI_STATE_WORKING) return false; 4115 4116 // decline incoming connections 4117 if (hci_stack->decline_reason){ 4118 uint8_t reason = hci_stack->decline_reason; 4119 hci_stack->decline_reason = 0; 4120 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4121 return true; 4122 } 4123 4124 if ((hci_stack->gap_tasks & GAP_TASK_SET_CLASS_OF_DEVICE) != 0) { 4125 hci_stack->gap_tasks &= ~GAP_TASK_SET_CLASS_OF_DEVICE; 4126 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 4127 return true; 4128 } 4129 if ((hci_stack->gap_tasks & GAP_TASK_SET_LOCAL_NAME) != 0) { 4130 hci_stack->gap_tasks &= ~GAP_TASK_SET_LOCAL_NAME; 4131 gap_run_set_local_name(); 4132 return true; 4133 } 4134 if ((hci_stack->gap_tasks & GAP_TASK_SET_EIR_DATA) != 0) { 4135 hci_stack->gap_tasks &= ~GAP_TASK_SET_EIR_DATA; 4136 gap_run_set_eir_data(); 4137 return true; 4138 } 4139 if ((hci_stack->gap_tasks & GAP_TASK_SET_DEFAULT_LINK_POLICY) != 0) { 4140 hci_stack->gap_tasks &= ~GAP_TASK_SET_DEFAULT_LINK_POLICY; 4141 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 4142 return true; 4143 } 4144 // write page scan activity 4145 if (hci_stack->new_page_scan_interval != 0xffff) { 4146 uint16_t new_page_scan_interval = hci_stack->new_page_scan_interval; 4147 uint16_t new_page_scan_window = hci_stack->new_page_scan_window; 4148 hci_stack->new_page_scan_interval = 0xffff; 4149 hci_stack->new_page_scan_window = 0xffff; 4150 hci_send_cmd(&hci_write_page_scan_activity, new_page_scan_interval, new_page_scan_window); 4151 return true; 4152 } 4153 // write page scan type 4154 if (hci_stack->new_page_scan_type != 0xff) { 4155 uint8_t new_page_scan_type = hci_stack->new_page_scan_type; 4156 hci_stack->new_page_scan_type = 0xff; 4157 hci_send_cmd(&hci_write_page_scan_type, new_page_scan_type); 4158 return true; 4159 } 4160 // send scan enable 4161 if (hci_stack->new_scan_enable_value != 0xff) { 4162 uint8_t new_scan_enable_value = hci_stack->new_scan_enable_value; 4163 hci_stack->new_scan_enable_value = 0xff; 4164 hci_send_cmd(&hci_write_scan_enable, new_scan_enable_value); 4165 return true; 4166 } 4167 4168 // start/stop inquiry 4169 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4170 uint8_t duration = hci_stack->inquiry_state; 4171 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4172 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4173 return true; 4174 } 4175 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4176 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4177 hci_send_cmd(&hci_inquiry_cancel); 4178 return true; 4179 } 4180 // remote name request 4181 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4182 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4183 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4184 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4185 return true; 4186 } 4187 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4188 // Local OOB data 4189 if (hci_stack->classic_read_local_oob_data){ 4190 hci_stack->classic_read_local_oob_data = false; 4191 if (hci_stack->local_supported_commands[1] & 0x10u){ 4192 hci_send_cmd(&hci_read_local_extended_oob_data); 4193 } else { 4194 hci_send_cmd(&hci_read_local_oob_data); 4195 } 4196 } 4197 #endif 4198 // pairing 4199 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4200 uint8_t state = hci_stack->gap_pairing_state; 4201 uint8_t pin_code[16]; 4202 switch (state){ 4203 case GAP_PAIRING_STATE_SEND_PIN: 4204 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4205 memset(pin_code, 0, 16); 4206 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4207 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4208 break; 4209 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4210 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4211 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4212 break; 4213 case GAP_PAIRING_STATE_SEND_PASSKEY: 4214 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4215 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4216 break; 4217 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4218 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4219 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4220 break; 4221 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4222 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4223 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4224 break; 4225 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4226 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4227 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4228 break; 4229 default: 4230 break; 4231 } 4232 return true; 4233 } 4234 return false; 4235 } 4236 #endif 4237 4238 #ifdef ENABLE_BLE 4239 static bool hci_run_general_gap_le(void){ 4240 4241 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4242 4243 if (hci_stack->state != HCI_STATE_WORKING) return false; 4244 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4245 4246 4247 // Phase 1: collect what to stop 4248 4249 bool scanning_stop = false; 4250 bool connecting_stop = false; 4251 bool advertising_stop = false; 4252 4253 #ifndef ENABLE_LE_CENTRAL 4254 UNUSED(scanning_stop); 4255 UNUSED(connecting_stop); 4256 #endif 4257 #ifndef ENABLE_LE_PERIPHERAL 4258 UNUSED(advertising_stop); 4259 #endif 4260 4261 // check if whitelist needs modification 4262 bool whitelist_modification_pending = false; 4263 btstack_linked_list_iterator_t lit; 4264 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4265 while (btstack_linked_list_iterator_has_next(&lit)){ 4266 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4267 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4268 whitelist_modification_pending = true; 4269 break; 4270 } 4271 } 4272 // check if resolving list needs modification 4273 bool resolving_list_modification_pending = false; 4274 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4275 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4276 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4277 resolving_list_modification_pending = true; 4278 } 4279 #endif 4280 4281 #ifdef ENABLE_LE_CENTRAL 4282 // scanning control 4283 if (hci_stack->le_scanning_active) { 4284 // stop if: 4285 // - parameter change required 4286 // - it's disabled 4287 // - whitelist change required but used for scanning 4288 // - resolving list modified 4289 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4290 if ((hci_stack->le_scanning_param_update) || 4291 !hci_stack->le_scanning_enabled || 4292 scanning_uses_whitelist || 4293 resolving_list_modification_pending){ 4294 4295 scanning_stop = true; 4296 } 4297 } 4298 #endif 4299 4300 #ifdef ENABLE_LE_CENTRAL 4301 // connecting control 4302 bool connecting_with_whitelist; 4303 switch (hci_stack->le_connecting_state){ 4304 case LE_CONNECTING_DIRECT: 4305 case LE_CONNECTING_WHITELIST: 4306 // stop connecting if: 4307 // - connecting uses white and whitelist modification pending 4308 // - if it got disabled 4309 // - resolving list modified 4310 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4311 if ((connecting_with_whitelist && whitelist_modification_pending) || 4312 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4313 resolving_list_modification_pending) { 4314 4315 connecting_stop = true; 4316 } 4317 break; 4318 default: 4319 break; 4320 } 4321 #endif 4322 4323 #ifdef ENABLE_LE_PERIPHERAL 4324 // le advertisement control 4325 if (hci_stack->le_advertisements_active){ 4326 // stop if: 4327 // - parameter change required 4328 // - it's disabled 4329 // - whitelist change required but used for advertisement filter policy 4330 // - resolving list modified 4331 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4332 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4333 if (advertising_change || 4334 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4335 (advertising_uses_whitelist & whitelist_modification_pending) || 4336 resolving_list_modification_pending) { 4337 4338 advertising_stop = true; 4339 } 4340 } 4341 #endif 4342 4343 4344 // Phase 2: stop everything that should be off during modifications 4345 4346 #ifdef ENABLE_LE_CENTRAL 4347 if (scanning_stop){ 4348 hci_stack->le_scanning_active = false; 4349 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4350 return true; 4351 } 4352 #endif 4353 4354 #ifdef ENABLE_LE_CENTRAL 4355 if (connecting_stop){ 4356 hci_send_cmd(&hci_le_create_connection_cancel); 4357 return true; 4358 } 4359 #endif 4360 4361 #ifdef ENABLE_LE_PERIPHERAL 4362 if (advertising_stop){ 4363 hci_stack->le_advertisements_active = false; 4364 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4365 return true; 4366 } 4367 #endif 4368 4369 // Phase 3: modify 4370 4371 #ifdef ENABLE_LE_CENTRAL 4372 if (hci_stack->le_scanning_param_update){ 4373 hci_stack->le_scanning_param_update = false; 4374 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4375 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4376 return true; 4377 } 4378 #endif 4379 4380 #ifdef ENABLE_LE_PERIPHERAL 4381 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4382 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4383 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4384 hci_send_cmd(&hci_le_set_advertising_parameters, 4385 hci_stack->le_advertisements_interval_min, 4386 hci_stack->le_advertisements_interval_max, 4387 hci_stack->le_advertisements_type, 4388 hci_stack->le_advertisements_own_addr_type, 4389 hci_stack->le_advertisements_direct_address_type, 4390 hci_stack->le_advertisements_direct_address, 4391 hci_stack->le_advertisements_channel_map, 4392 hci_stack->le_advertisements_filter_policy); 4393 return true; 4394 } 4395 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4396 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4397 uint8_t adv_data_clean[31]; 4398 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4399 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4400 hci_stack->le_advertisements_data_len); 4401 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4402 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4403 return true; 4404 } 4405 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4406 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4407 uint8_t scan_data_clean[31]; 4408 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4409 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4410 hci_stack->le_scan_response_data_len); 4411 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4412 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4413 return true; 4414 } 4415 #endif 4416 4417 4418 #ifdef ENABLE_LE_CENTRAL 4419 // if connect with whitelist was active and is not cancelled yet, wait until next time 4420 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4421 #endif 4422 4423 // LE Whitelist Management 4424 if (whitelist_modification_pending){ 4425 // add/remove entries 4426 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4427 while (btstack_linked_list_iterator_has_next(&lit)){ 4428 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4429 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4430 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4431 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4432 return true; 4433 } 4434 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4435 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4436 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4437 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4438 return true; 4439 } 4440 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4441 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4442 btstack_memory_whitelist_entry_free(entry); 4443 } 4444 } 4445 } 4446 4447 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4448 // LE Resolving List Management 4449 if (resolving_list_supported) { 4450 uint16_t i; 4451 switch (hci_stack->le_resolving_list_state) { 4452 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4453 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4454 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4455 return true; 4456 case LE_RESOLVING_LIST_READ_SIZE: 4457 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4458 hci_send_cmd(&hci_le_read_resolving_list_size); 4459 return true; 4460 case LE_RESOLVING_LIST_SEND_CLEAR: 4461 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4462 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4463 sizeof(hci_stack->le_resolving_list_add_entries)); 4464 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4465 sizeof(hci_stack->le_resolving_list_remove_entries)); 4466 hci_send_cmd(&hci_le_clear_resolving_list); 4467 return true; 4468 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4469 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4470 uint8_t offset = i >> 3; 4471 uint8_t mask = 1 << (i & 7); 4472 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4473 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4474 bd_addr_t peer_identity_addreses; 4475 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4476 sm_key_t peer_irk; 4477 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4478 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4479 4480 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4481 // trigger whitelist entry 'update' (work around for controller bug) 4482 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4483 while (btstack_linked_list_iterator_has_next(&lit)) { 4484 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4485 if (entry->address_type != peer_identity_addr_type) continue; 4486 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4487 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4488 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4489 } 4490 #endif 4491 4492 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4493 peer_identity_addreses); 4494 return true; 4495 } 4496 4497 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4498 4499 /* fall through */ 4500 4501 case LE_RESOLVING_LIST_ADD_ENTRIES: 4502 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4503 uint8_t offset = i >> 3; 4504 uint8_t mask = 1 << (i & 7); 4505 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4506 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4507 bd_addr_t peer_identity_addreses; 4508 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4509 sm_key_t peer_irk; 4510 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4511 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4512 const uint8_t *local_irk = gap_get_persistent_irk(); 4513 // command uses format specifier 'P' that stores 16-byte value without flip 4514 uint8_t local_irk_flipped[16]; 4515 uint8_t peer_irk_flipped[16]; 4516 reverse_128(local_irk, local_irk_flipped); 4517 reverse_128(peer_irk, peer_irk_flipped); 4518 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4519 peer_irk_flipped, local_irk_flipped); 4520 return true; 4521 } 4522 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4523 break; 4524 4525 default: 4526 break; 4527 } 4528 } 4529 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4530 #endif 4531 4532 // Phase 4: restore state 4533 4534 #ifdef ENABLE_LE_CENTRAL 4535 // re-start scanning 4536 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4537 hci_stack->le_scanning_active = true; 4538 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4539 return true; 4540 } 4541 #endif 4542 4543 #ifdef ENABLE_LE_CENTRAL 4544 // re-start connecting 4545 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4546 bd_addr_t null_addr; 4547 memset(null_addr, 0, 6); 4548 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4549 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4550 hci_send_cmd(&hci_le_create_connection, 4551 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4552 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4553 1, // use whitelist 4554 0, // peer address type 4555 null_addr, // peer bd addr 4556 hci_stack->le_connection_own_addr_type, // our addr type: 4557 hci_stack->le_connection_interval_min, // conn interval min 4558 hci_stack->le_connection_interval_max, // conn interval max 4559 hci_stack->le_connection_latency, // conn latency 4560 hci_stack->le_supervision_timeout, // conn latency 4561 hci_stack->le_minimum_ce_length, // min ce length 4562 hci_stack->le_maximum_ce_length // max ce length 4563 ); 4564 return true; 4565 } 4566 #endif 4567 4568 #ifdef ENABLE_LE_PERIPHERAL 4569 // re-start advertising 4570 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4571 // check if advertisements should be enabled given 4572 hci_stack->le_advertisements_active = true; 4573 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4574 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4575 return true; 4576 } 4577 #endif 4578 4579 return false; 4580 } 4581 #endif 4582 4583 static bool hci_run_general_pending_commands(void){ 4584 btstack_linked_item_t * it; 4585 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4586 hci_connection_t * connection = (hci_connection_t *) it; 4587 4588 switch(connection->state){ 4589 case SEND_CREATE_CONNECTION: 4590 switch(connection->address_type){ 4591 #ifdef ENABLE_CLASSIC 4592 case BD_ADDR_TYPE_ACL: 4593 log_info("sending hci_create_connection"); 4594 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4595 break; 4596 #endif 4597 default: 4598 #ifdef ENABLE_BLE 4599 #ifdef ENABLE_LE_CENTRAL 4600 log_info("sending hci_le_create_connection"); 4601 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4602 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4603 hci_send_cmd(&hci_le_create_connection, 4604 hci_stack->le_connection_scan_interval, // conn scan interval 4605 hci_stack->le_connection_scan_window, // conn scan windows 4606 0, // don't use whitelist 4607 connection->address_type, // peer address type 4608 connection->address, // peer bd addr 4609 hci_stack->le_connection_own_addr_type, // our addr type: 4610 hci_stack->le_connection_interval_min, // conn interval min 4611 hci_stack->le_connection_interval_max, // conn interval max 4612 hci_stack->le_connection_latency, // conn latency 4613 hci_stack->le_supervision_timeout, // conn latency 4614 hci_stack->le_minimum_ce_length, // min ce length 4615 hci_stack->le_maximum_ce_length // max ce length 4616 ); 4617 connection->state = SENT_CREATE_CONNECTION; 4618 #endif 4619 #endif 4620 break; 4621 } 4622 return true; 4623 4624 #ifdef ENABLE_CLASSIC 4625 case RECEIVED_CONNECTION_REQUEST: 4626 connection->role = HCI_ROLE_SLAVE; 4627 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4628 log_info("sending hci_accept_connection_request"); 4629 connection->state = ACCEPTED_CONNECTION_REQUEST; 4630 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4631 } 4632 return true; 4633 #endif 4634 4635 #ifdef ENABLE_BLE 4636 #ifdef ENABLE_LE_CENTRAL 4637 case SEND_CANCEL_CONNECTION: 4638 connection->state = SENT_CANCEL_CONNECTION; 4639 hci_send_cmd(&hci_le_create_connection_cancel); 4640 return true; 4641 #endif 4642 #endif 4643 case SEND_DISCONNECT: 4644 connection->state = SENT_DISCONNECT; 4645 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4646 return true; 4647 4648 default: 4649 break; 4650 } 4651 4652 // no further commands if connection is about to get shut down 4653 if (connection->state == SENT_DISCONNECT) continue; 4654 4655 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4656 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4657 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4658 return true; 4659 } 4660 4661 #ifdef ENABLE_CLASSIC 4662 4663 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4664 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4665 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4666 return true; 4667 } 4668 4669 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4670 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4671 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4672 return true; 4673 } 4674 4675 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4676 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4677 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4678 return true; 4679 } 4680 4681 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4682 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4683 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4684 return true; 4685 } 4686 4687 // Handling link key request requires remote supported features 4688 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4689 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4690 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4691 4692 // lookup link key using cached key first 4693 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4694 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4695 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4696 } 4697 4698 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4699 if (have_link_key && security_level_sufficient){ 4700 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4701 } else { 4702 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4703 } 4704 return true; 4705 } 4706 4707 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4708 log_info("denying to pin request"); 4709 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4710 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4711 return true; 4712 } 4713 4714 // security assessment requires remote features 4715 if ((connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST) != 0){ 4716 connectionClearAuthenticationFlags(connection, AUTH_FLAG_RECV_IO_CAPABILITIES_REQUEST); 4717 hci_ssp_assess_security_on_io_cap_request(connection); 4718 // 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 4719 } 4720 4721 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4722 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4723 // set authentication requirements: 4724 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4725 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4726 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4727 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4728 authreq |= 1; 4729 } 4730 bool bonding = hci_stack->bondable; 4731 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4732 // if we have received IO Cap Response, we're in responder role 4733 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4734 if (bonding && !remote_bonding){ 4735 log_info("Remote not bonding, dropping local flag"); 4736 bonding = false; 4737 } 4738 } 4739 if (bonding){ 4740 if (connection->bonding_flags & BONDING_DEDICATED){ 4741 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4742 } else { 4743 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4744 } 4745 } 4746 uint8_t have_oob_data = 0; 4747 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4748 if (connection->classic_oob_c_192 != NULL){ 4749 have_oob_data |= 1; 4750 } 4751 if (connection->classic_oob_c_256 != NULL){ 4752 have_oob_data |= 2; 4753 } 4754 #endif 4755 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4756 return true; 4757 } 4758 4759 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4760 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4761 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4762 return true; 4763 } 4764 4765 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4766 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4767 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4768 const uint8_t zero[16] = { 0 }; 4769 const uint8_t * r_192 = zero; 4770 const uint8_t * c_192 = zero; 4771 const uint8_t * r_256 = zero; 4772 const uint8_t * c_256 = zero; 4773 // verify P-256 OOB 4774 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4775 c_256 = connection->classic_oob_c_256; 4776 if (connection->classic_oob_r_256 != NULL) { 4777 r_256 = connection->classic_oob_r_256; 4778 } 4779 } 4780 // verify P-192 OOB 4781 if ((connection->classic_oob_c_192 != NULL)) { 4782 c_192 = connection->classic_oob_c_192; 4783 if (connection->classic_oob_r_192 != NULL) { 4784 r_192 = connection->classic_oob_r_192; 4785 } 4786 } 4787 4788 // assess security 4789 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4790 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4791 if (need_level_4 && !can_reach_level_4){ 4792 log_info("Level 4 required, but not possible -> abort"); 4793 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4794 // send oob negative reply 4795 c_256 = NULL; 4796 c_192 = NULL; 4797 } 4798 4799 // Reply 4800 if (c_256 != zero) { 4801 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4802 } else if (c_192 != zero){ 4803 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4804 } else { 4805 hci_stack->classic_oob_con_handle = connection->con_handle; 4806 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4807 } 4808 return true; 4809 } 4810 #endif 4811 4812 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4813 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4814 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4815 return true; 4816 } 4817 4818 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4819 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4820 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4821 return true; 4822 } 4823 4824 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4825 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4826 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4827 return true; 4828 } 4829 4830 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4831 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4832 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4833 connection->state = SENT_DISCONNECT; 4834 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4835 return true; 4836 } 4837 4838 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4839 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4840 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4841 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4842 return true; 4843 } 4844 4845 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4846 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4847 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4848 return true; 4849 } 4850 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4851 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4852 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4853 return true; 4854 } 4855 #endif 4856 4857 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4858 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4859 #ifdef ENABLE_CLASSIC 4860 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4861 #endif 4862 if (connection->state != SENT_DISCONNECT){ 4863 connection->state = SENT_DISCONNECT; 4864 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4865 return true; 4866 } 4867 } 4868 4869 #ifdef ENABLE_CLASSIC 4870 uint16_t sniff_min_interval; 4871 switch (connection->sniff_min_interval){ 4872 case 0: 4873 break; 4874 case 0xffff: 4875 connection->sniff_min_interval = 0; 4876 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4877 return true; 4878 default: 4879 sniff_min_interval = connection->sniff_min_interval; 4880 connection->sniff_min_interval = 0; 4881 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4882 return true; 4883 } 4884 4885 if (connection->sniff_subrating_max_latency != 0xffff){ 4886 uint16_t max_latency = connection->sniff_subrating_max_latency; 4887 connection->sniff_subrating_max_latency = 0; 4888 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4889 return true; 4890 } 4891 4892 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4893 uint8_t service_type = (uint8_t) connection->qos_service_type; 4894 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4895 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); 4896 return true; 4897 } 4898 4899 if (connection->request_role != HCI_ROLE_INVALID){ 4900 hci_role_t role = connection->request_role; 4901 connection->request_role = HCI_ROLE_INVALID; 4902 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4903 return true; 4904 } 4905 #endif 4906 4907 #ifdef ENABLE_BLE 4908 switch (connection->le_con_parameter_update_state){ 4909 // response to L2CAP CON PARAMETER UPDATE REQUEST 4910 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4911 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4912 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4913 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4914 0x0000, 0xffff); 4915 return true; 4916 case CON_PARAMETER_UPDATE_REPLY: 4917 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4918 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4919 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4920 0x0000, 0xffff); 4921 return true; 4922 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4923 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4924 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4925 return true; 4926 default: 4927 break; 4928 } 4929 if (connection->le_phy_update_all_phys != 0xffu){ 4930 uint8_t all_phys = connection->le_phy_update_all_phys; 4931 connection->le_phy_update_all_phys = 0xff; 4932 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); 4933 return true; 4934 } 4935 #endif 4936 } 4937 return false; 4938 } 4939 4940 static void hci_run(void){ 4941 4942 bool done; 4943 4944 // send continuation fragments first, as they block the prepared packet buffer 4945 done = hci_run_acl_fragments(); 4946 if (done) return; 4947 4948 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4949 // send host num completed packets next as they don't require num_cmd_packets > 0 4950 if (!hci_can_send_comand_packet_transport()) return; 4951 if (hci_stack->host_completed_packets){ 4952 hci_host_num_completed_packets(); 4953 return; 4954 } 4955 #endif 4956 4957 if (!hci_can_send_command_packet_now()) return; 4958 4959 // global/non-connection oriented commands 4960 4961 4962 #ifdef ENABLE_CLASSIC 4963 // general gap classic 4964 done = hci_run_general_gap_classic(); 4965 if (done) return; 4966 #endif 4967 4968 #ifdef ENABLE_BLE 4969 // general gap le 4970 done = hci_run_general_gap_le(); 4971 if (done) return; 4972 #endif 4973 4974 // send pending HCI commands 4975 done = hci_run_general_pending_commands(); 4976 if (done) return; 4977 4978 // stack state sub statemachines 4979 hci_connection_t * connection; 4980 switch (hci_stack->state){ 4981 case HCI_STATE_INITIALIZING: 4982 hci_initializing_run(); 4983 break; 4984 4985 case HCI_STATE_HALTING: 4986 4987 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4988 switch (hci_stack->substate){ 4989 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4990 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4991 4992 #ifdef ENABLE_BLE 4993 #ifdef ENABLE_LE_CENTRAL 4994 // free whitelist entries 4995 { 4996 btstack_linked_list_iterator_t lit; 4997 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4998 while (btstack_linked_list_iterator_has_next(&lit)){ 4999 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 5000 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 5001 btstack_memory_whitelist_entry_free(entry); 5002 } 5003 } 5004 #endif 5005 #endif 5006 // close all open connections 5007 connection = (hci_connection_t *) hci_stack->connections; 5008 if (connection){ 5009 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 5010 if (!hci_can_send_command_packet_now()) return; 5011 5012 // check state 5013 if (connection->state == SENT_DISCONNECT) return; 5014 connection->state = SENT_DISCONNECT; 5015 5016 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 5017 5018 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 5019 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 5020 5021 // ... which would be ignored anyway as we shutdown (free) the connection now 5022 hci_shutdown_connection(connection); 5023 5024 // finally, send the disconnect command 5025 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5026 return; 5027 } 5028 5029 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 5030 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 5031 log_info("HCI_STATE_HALTING: wait 50 ms"); 5032 hci_stack->substate = HCI_HALTING_W4_TIMER; 5033 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 5034 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 5035 btstack_run_loop_add_timer(&hci_stack->timeout); 5036 break; 5037 } 5038 5039 /* fall through */ 5040 5041 case HCI_HALTING_CLOSE: 5042 log_info("HCI_STATE_HALTING, calling off"); 5043 5044 // switch mode 5045 hci_power_control_off(); 5046 5047 log_info("HCI_STATE_HALTING, emitting state"); 5048 hci_emit_state(); 5049 log_info("HCI_STATE_HALTING, done"); 5050 break; 5051 5052 case HCI_HALTING_W4_TIMER: 5053 // keep waiting 5054 5055 break; 5056 default: 5057 break; 5058 } 5059 5060 break; 5061 5062 case HCI_STATE_FALLING_ASLEEP: 5063 switch(hci_stack->substate) { 5064 case HCI_FALLING_ASLEEP_DISCONNECT: 5065 log_info("HCI_STATE_FALLING_ASLEEP"); 5066 // close all open connections 5067 connection = (hci_connection_t *) hci_stack->connections; 5068 5069 #ifdef HAVE_PLATFORM_IPHONE_OS 5070 // don't close connections, if H4 supports power management 5071 if (btstack_control_iphone_power_management_enabled()){ 5072 connection = NULL; 5073 } 5074 #endif 5075 if (connection){ 5076 5077 // send disconnect 5078 if (!hci_can_send_command_packet_now()) return; 5079 5080 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 5081 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 5082 5083 // send disconnected event right away - causes higher layer connections to get closed, too. 5084 hci_shutdown_connection(connection); 5085 return; 5086 } 5087 5088 if (hci_classic_supported()){ 5089 // disable page and inquiry scan 5090 if (!hci_can_send_command_packet_now()) return; 5091 5092 log_info("HCI_STATE_HALTING, disabling inq scans"); 5093 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 5094 5095 // continue in next sub state 5096 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 5097 break; 5098 } 5099 5100 /* fall through */ 5101 5102 case HCI_FALLING_ASLEEP_COMPLETE: 5103 log_info("HCI_STATE_HALTING, calling sleep"); 5104 #ifdef HAVE_PLATFORM_IPHONE_OS 5105 // don't actually go to sleep, if H4 supports power management 5106 if (btstack_control_iphone_power_management_enabled()){ 5107 // SLEEP MODE reached 5108 hci_stack->state = HCI_STATE_SLEEPING; 5109 hci_emit_state(); 5110 break; 5111 } 5112 #endif 5113 // switch mode 5114 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5115 hci_emit_state(); 5116 break; 5117 5118 default: 5119 break; 5120 } 5121 break; 5122 5123 default: 5124 break; 5125 } 5126 } 5127 5128 uint8_t hci_send_cmd_packet(uint8_t *packet, int size){ 5129 // house-keeping 5130 5131 #ifdef ENABLE_CLASSIC 5132 bd_addr_t addr; 5133 hci_connection_t * conn; 5134 #endif 5135 #ifdef ENABLE_LE_CENTRAL 5136 uint8_t initiator_filter_policy; 5137 #endif 5138 5139 uint16_t opcode = little_endian_read_16(packet, 0); 5140 switch (opcode) { 5141 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5142 hci_stack->loopback_mode = packet[3]; 5143 break; 5144 5145 #ifdef ENABLE_CLASSIC 5146 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5147 reverse_bd_addr(&packet[3], addr); 5148 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5149 5150 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5151 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5152 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5153 return ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 5154 } 5155 5156 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5157 if (!conn) { 5158 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5159 if (!conn) { 5160 // notify client that alloc failed 5161 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5162 return BTSTACK_MEMORY_ALLOC_FAILED; // packet not sent to controller 5163 } 5164 conn->state = SEND_CREATE_CONNECTION; 5165 conn->role = HCI_ROLE_MASTER; 5166 } 5167 log_info("conn state %u", conn->state); 5168 // TODO: L2CAP should not send create connection command, instead a (new) gap function should be used 5169 switch (conn->state) { 5170 // if connection active exists 5171 case OPEN: 5172 // and OPEN, emit connection complete command 5173 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5174 // packet not sent to controller 5175 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5176 case RECEIVED_DISCONNECTION_COMPLETE: 5177 // create connection triggered in disconnect complete event, let's do it now 5178 break; 5179 case SEND_CREATE_CONNECTION: 5180 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5181 break; 5182 default: 5183 // otherwise, just ignore as it is already in the open process 5184 // packet not sent to controller 5185 return ERROR_CODE_ACL_CONNECTION_ALREADY_EXISTS; 5186 } 5187 conn->state = SENT_CREATE_CONNECTION; 5188 5189 // track outgoing connection 5190 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5191 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5192 break; 5193 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5194 if (hci_stack->link_key_db) { 5195 reverse_bd_addr(&packet[3], addr); 5196 hci_stack->link_key_db->delete_link_key(addr); 5197 } 5198 break; 5199 5200 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5201 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5202 // setup_synchronous_connection? Voice setting at offset 22 5203 // TODO: compare to current setting if sco connection already active 5204 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5205 break; 5206 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5207 // accept_synchronus_connection? Voice setting at offset 18 5208 // TODO: compare to current setting if sco connection already active 5209 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5210 break; 5211 #endif 5212 #endif 5213 5214 #ifdef ENABLE_BLE 5215 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5216 hci_stack->le_random_address_set = 1; 5217 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5218 break; 5219 #ifdef ENABLE_LE_PERIPHERAL 5220 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5221 hci_stack->le_advertisements_active = packet[3] != 0; 5222 break; 5223 #endif 5224 #ifdef ENABLE_LE_CENTRAL 5225 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5226 // white list used? 5227 initiator_filter_policy = packet[7]; 5228 switch (initiator_filter_policy) { 5229 case 0: 5230 // whitelist not used 5231 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5232 break; 5233 case 1: 5234 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5235 break; 5236 default: 5237 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5238 break; 5239 } 5240 // track outgoing connection 5241 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5242 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5243 break; 5244 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5245 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5246 break; 5247 #endif 5248 #endif 5249 default: 5250 break; 5251 } 5252 5253 hci_stack->num_cmd_packets--; 5254 5255 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5256 int err = hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5257 if (err != 0){ 5258 return ERROR_CODE_HARDWARE_FAILURE; 5259 } 5260 return ERROR_CODE_SUCCESS; 5261 } 5262 5263 // disconnect because of security block 5264 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5265 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5266 if (!connection) return; 5267 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5268 } 5269 5270 5271 // Configure Secure Simple Pairing 5272 5273 #ifdef ENABLE_CLASSIC 5274 5275 // enable will enable SSP during init 5276 void gap_ssp_set_enable(int enable){ 5277 hci_stack->ssp_enable = enable; 5278 } 5279 5280 static int hci_local_ssp_activated(void){ 5281 return gap_ssp_supported() && hci_stack->ssp_enable; 5282 } 5283 5284 // if set, BTstack will respond to io capability request using authentication requirement 5285 void gap_ssp_set_io_capability(int io_capability){ 5286 hci_stack->ssp_io_capability = io_capability; 5287 } 5288 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5289 hci_stack->ssp_authentication_requirement = authentication_requirement; 5290 } 5291 5292 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5293 void gap_ssp_set_auto_accept(int auto_accept){ 5294 hci_stack->ssp_auto_accept = auto_accept; 5295 } 5296 5297 void gap_secure_connections_enable(bool enable){ 5298 hci_stack->secure_connections_enable = enable; 5299 } 5300 5301 #endif 5302 5303 // va_list part of hci_send_cmd 5304 uint8_t hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5305 if (!hci_can_send_command_packet_now()){ 5306 log_error("hci_send_cmd called but cannot send packet now"); 5307 return ERROR_CODE_COMMAND_DISALLOWED; 5308 } 5309 5310 // for HCI INITIALIZATION 5311 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5312 hci_stack->last_cmd_opcode = cmd->opcode; 5313 5314 hci_reserve_packet_buffer(); 5315 uint8_t * packet = hci_stack->hci_packet_buffer; 5316 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5317 uint8_t status = hci_send_cmd_packet(packet, size); 5318 5319 // release packet buffer on error or for synchronous transport implementations 5320 if ((status != ERROR_CODE_SUCCESS) || hci_transport_synchronous()){ 5321 hci_release_packet_buffer(); 5322 hci_emit_transport_packet_sent(); 5323 } 5324 5325 return status; 5326 } 5327 5328 /** 5329 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5330 */ 5331 uint8_t hci_send_cmd(const hci_cmd_t * cmd, ...){ 5332 va_list argptr; 5333 va_start(argptr, cmd); 5334 uint8_t status = hci_send_cmd_va_arg(cmd, argptr); 5335 va_end(argptr); 5336 return status; 5337 } 5338 5339 // Create various non-HCI events. 5340 // TODO: generalize, use table similar to hci_create_command 5341 5342 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5343 // dump packet 5344 if (dump) { 5345 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5346 } 5347 5348 // dispatch to all event handlers 5349 btstack_linked_list_iterator_t it; 5350 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5351 while (btstack_linked_list_iterator_has_next(&it)){ 5352 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5353 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5354 } 5355 } 5356 5357 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5358 if (!hci_stack->acl_packet_handler) return; 5359 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5360 } 5361 5362 #ifdef ENABLE_CLASSIC 5363 static void hci_notify_if_sco_can_send_now(void){ 5364 // notify SCO sender if waiting 5365 if (!hci_stack->sco_waiting_for_can_send_now) return; 5366 if (hci_can_send_sco_packet_now()){ 5367 hci_stack->sco_waiting_for_can_send_now = 0; 5368 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5369 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5370 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5371 } 5372 } 5373 5374 // parsing end emitting has been merged to reduce code size 5375 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5376 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5377 5378 uint8_t * eir_data; 5379 ad_context_t context; 5380 const uint8_t * name; 5381 uint8_t name_len; 5382 5383 if (size < 3) return; 5384 5385 int event_type = hci_event_packet_get_type(packet); 5386 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5387 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5388 5389 switch (event_type){ 5390 case HCI_EVENT_INQUIRY_RESULT: 5391 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5392 if (size != (3 + (num_responses * 14))) return; 5393 break; 5394 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5395 if (size != 257) return; 5396 if (num_responses != 1) return; 5397 break; 5398 default: 5399 return; 5400 } 5401 5402 // event[1] is set at the end 5403 int i; 5404 for (i=0; i<num_responses;i++){ 5405 memset(event, 0, sizeof(event)); 5406 event[0] = GAP_EVENT_INQUIRY_RESULT; 5407 uint8_t event_size = 27; // if name is not set by EIR 5408 5409 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5410 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5411 (void)memcpy(&event[9], 5412 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5413 3); // class of device 5414 (void)memcpy(&event[12], 5415 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5416 2); // clock offset 5417 5418 switch (event_type){ 5419 case HCI_EVENT_INQUIRY_RESULT: 5420 // 14,15,16,17 = 0, size 18 5421 break; 5422 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5423 event[14] = 1; 5424 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5425 // 16,17 = 0, size 18 5426 break; 5427 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5428 event[14] = 1; 5429 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5430 // EIR packets only contain a single inquiry response 5431 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5432 name = NULL; 5433 // Iterate over EIR data 5434 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5435 uint8_t data_type = ad_iterator_get_data_type(&context); 5436 uint8_t data_size = ad_iterator_get_data_len(&context); 5437 const uint8_t * data = ad_iterator_get_data(&context); 5438 // Prefer Complete Local Name over Shortened Local Name 5439 switch (data_type){ 5440 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5441 if (name) continue; 5442 /* fall through */ 5443 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5444 name = data; 5445 name_len = data_size; 5446 break; 5447 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5448 if (data_size != 8) break; 5449 event[16] = 1; 5450 memcpy(&event[17], data, 8); 5451 break; 5452 default: 5453 break; 5454 } 5455 } 5456 if (name){ 5457 event[25] = 1; 5458 // truncate name if needed 5459 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5460 event[26] = len; 5461 (void)memcpy(&event[27], name, len); 5462 event_size += len; 5463 } 5464 break; 5465 default: 5466 return; 5467 } 5468 event[1] = event_size - 2; 5469 hci_emit_event(event, event_size, 1); 5470 } 5471 } 5472 #endif 5473 5474 void hci_emit_state(void){ 5475 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5476 uint8_t event[3]; 5477 event[0] = BTSTACK_EVENT_STATE; 5478 event[1] = sizeof(event) - 2u; 5479 event[2] = hci_stack->state; 5480 hci_emit_event(event, sizeof(event), 1); 5481 } 5482 5483 #ifdef ENABLE_CLASSIC 5484 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5485 uint8_t event[13]; 5486 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5487 event[1] = sizeof(event) - 2; 5488 event[2] = status; 5489 little_endian_store_16(event, 3, con_handle); 5490 reverse_bd_addr(address, &event[5]); 5491 event[11] = 1; // ACL connection 5492 event[12] = 0; // encryption disabled 5493 hci_emit_event(event, sizeof(event), 1); 5494 } 5495 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5496 if (disable_l2cap_timeouts) return; 5497 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5498 uint8_t event[4]; 5499 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5500 event[1] = sizeof(event) - 2; 5501 little_endian_store_16(event, 2, conn->con_handle); 5502 hci_emit_event(event, sizeof(event), 1); 5503 } 5504 #endif 5505 5506 #ifdef ENABLE_BLE 5507 #ifdef ENABLE_LE_CENTRAL 5508 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){ 5509 uint8_t event[21]; 5510 event[0] = HCI_EVENT_LE_META; 5511 event[1] = sizeof(event) - 2u; 5512 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5513 event[3] = status; 5514 little_endian_store_16(event, 4, con_handle); 5515 event[6] = 0; // TODO: role 5516 event[7] = address_type; 5517 reverse_bd_addr(address, &event[8]); 5518 little_endian_store_16(event, 14, 0); // interval 5519 little_endian_store_16(event, 16, 0); // latency 5520 little_endian_store_16(event, 18, 0); // supervision timeout 5521 event[20] = 0; // master clock accuracy 5522 hci_emit_event(event, sizeof(event), 1); 5523 } 5524 #endif 5525 #endif 5526 5527 static void hci_emit_transport_packet_sent(void){ 5528 // notify upper stack that it might be possible to send again 5529 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5530 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5531 } 5532 5533 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5534 uint8_t event[6]; 5535 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5536 event[1] = sizeof(event) - 2u; 5537 event[2] = 0; // status = OK 5538 little_endian_store_16(event, 3, con_handle); 5539 event[5] = reason; 5540 hci_emit_event(event, sizeof(event), 1); 5541 } 5542 5543 static void hci_emit_nr_connections_changed(void){ 5544 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5545 uint8_t event[3]; 5546 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5547 event[1] = sizeof(event) - 2u; 5548 event[2] = nr_hci_connections(); 5549 hci_emit_event(event, sizeof(event), 1); 5550 } 5551 5552 static void hci_emit_hci_open_failed(void){ 5553 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5554 uint8_t event[2]; 5555 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5556 event[1] = sizeof(event) - 2u; 5557 hci_emit_event(event, sizeof(event), 1); 5558 } 5559 5560 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5561 log_info("hci_emit_dedicated_bonding_result %u ", status); 5562 uint8_t event[9]; 5563 int pos = 0; 5564 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5565 event[pos++] = sizeof(event) - 2u; 5566 event[pos++] = status; 5567 reverse_bd_addr(address, &event[pos]); 5568 hci_emit_event(event, sizeof(event), 1); 5569 } 5570 5571 5572 #ifdef ENABLE_CLASSIC 5573 5574 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5575 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5576 uint8_t event[5]; 5577 int pos = 0; 5578 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5579 event[pos++] = sizeof(event) - 2; 5580 little_endian_store_16(event, 2, con_handle); 5581 pos += 2; 5582 event[pos++] = level; 5583 hci_emit_event(event, sizeof(event), 1); 5584 } 5585 5586 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5587 if (!connection) return LEVEL_0; 5588 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5589 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5590 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5591 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5592 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5593 // LEVEL 4 always requires 128 bit encrytion key size 5594 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5595 security_level = LEVEL_3; 5596 } 5597 return security_level; 5598 } 5599 5600 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5601 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5602 uint8_t event[3]; 5603 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5604 event[1] = sizeof(event) - 2; 5605 event[2] = enabled; 5606 hci_emit_event(event, sizeof(event), 1); 5607 } 5608 5609 // query if remote side supports eSCO 5610 bool hci_remote_esco_supported(hci_con_handle_t con_handle){ 5611 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5612 if (!connection) return false; 5613 return (connection->remote_supported_features[0] & 1) != 0; 5614 } 5615 5616 static bool hci_ssp_supported(hci_connection_t * connection){ 5617 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5618 return (connection->bonding_flags & mask) == mask; 5619 } 5620 5621 // query if remote side supports SSP 5622 bool hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5623 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5624 if (!connection) return false; 5625 return hci_ssp_supported(connection) ? 1 : 0; 5626 } 5627 5628 bool gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5629 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5630 } 5631 5632 // GAP API 5633 /** 5634 * @bbrief enable/disable bonding. default is enabled 5635 * @praram enabled 5636 */ 5637 void gap_set_bondable_mode(int enable){ 5638 hci_stack->bondable = enable ? 1 : 0; 5639 } 5640 /** 5641 * @brief Get bondable mode. 5642 * @return 1 if bondable 5643 */ 5644 int gap_get_bondable_mode(void){ 5645 return hci_stack->bondable; 5646 } 5647 5648 /** 5649 * @brief map link keys to security levels 5650 */ 5651 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5652 switch (link_key_type){ 5653 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5654 return LEVEL_4; 5655 case COMBINATION_KEY: 5656 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5657 return LEVEL_3; 5658 default: 5659 return LEVEL_2; 5660 } 5661 } 5662 5663 /** 5664 * @brief map link keys to secure connection yes/no 5665 */ 5666 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5667 switch (link_key_type){ 5668 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5669 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5670 return 1; 5671 default: 5672 return 0; 5673 } 5674 } 5675 5676 /** 5677 * @brief map link keys to authenticated 5678 */ 5679 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5680 switch (link_key_type){ 5681 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5682 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5683 return 1; 5684 default: 5685 return 0; 5686 } 5687 } 5688 5689 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5690 log_info("gap_mitm_protection_required_for_security_level %u", level); 5691 return level > LEVEL_2; 5692 } 5693 5694 /** 5695 * @brief get current security level 5696 */ 5697 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5698 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5699 if (!connection) return LEVEL_0; 5700 return gap_security_level_for_connection(connection); 5701 } 5702 5703 /** 5704 * @brief request connection to device to 5705 * @result GAP_AUTHENTICATION_RESULT 5706 */ 5707 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5708 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5709 if (!connection){ 5710 hci_emit_security_level(con_handle, LEVEL_0); 5711 return; 5712 } 5713 5714 btstack_assert(hci_is_le_connection(connection) == false); 5715 5716 // 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) 5717 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5718 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5719 requested_level = LEVEL_4; 5720 } 5721 5722 gap_security_level_t current_level = gap_security_level(con_handle); 5723 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5724 requested_level, connection->requested_security_level, current_level); 5725 5726 // authentication active if authentication request was sent or planned level > 0 5727 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5728 if (authentication_active){ 5729 // authentication already active 5730 if (connection->requested_security_level < requested_level){ 5731 // increase requested level as new level is higher 5732 // TODO: handle re-authentication when done 5733 connection->requested_security_level = requested_level; 5734 } 5735 } else { 5736 // no request active, notify if security sufficient 5737 if (requested_level <= current_level){ 5738 hci_emit_security_level(con_handle, current_level); 5739 return; 5740 } 5741 5742 // store request 5743 connection->requested_security_level = requested_level; 5744 5745 // start to authenticate connection 5746 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5747 hci_run(); 5748 } 5749 } 5750 5751 /** 5752 * @brief start dedicated bonding with device. disconnect after bonding 5753 * @param device 5754 * @param request MITM protection 5755 * @result GAP_DEDICATED_BONDING_COMPLETE 5756 */ 5757 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5758 5759 // create connection state machine 5760 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5761 5762 if (!connection){ 5763 return BTSTACK_MEMORY_ALLOC_FAILED; 5764 } 5765 5766 // delete linkn key 5767 gap_drop_link_key_for_bd_addr(device); 5768 5769 // configure LEVEL_2/3, dedicated bonding 5770 connection->state = SEND_CREATE_CONNECTION; 5771 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5772 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5773 connection->bonding_flags = BONDING_DEDICATED; 5774 5775 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5776 5777 // handle: connnection failure (connection complete != ok) 5778 // handle: authentication failure 5779 // handle: disconnect on done 5780 5781 hci_run(); 5782 5783 return 0; 5784 } 5785 5786 void gap_set_local_name(const char * local_name){ 5787 hci_stack->local_name = local_name; 5788 hci_stack->gap_tasks |= GAP_TASK_SET_LOCAL_NAME; 5789 // also update EIR if not set by user 5790 if (hci_stack->eir_data == NULL){ 5791 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 5792 } 5793 hci_run(); 5794 } 5795 #endif 5796 5797 5798 #ifdef ENABLE_BLE 5799 5800 #ifdef ENABLE_LE_CENTRAL 5801 void gap_start_scan(void){ 5802 hci_stack->le_scanning_enabled = true; 5803 hci_run(); 5804 } 5805 5806 void gap_stop_scan(void){ 5807 hci_stack->le_scanning_enabled = false; 5808 hci_run(); 5809 } 5810 5811 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5812 hci_stack->le_scan_type = scan_type; 5813 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5814 hci_stack->le_scan_interval = scan_interval; 5815 hci_stack->le_scan_window = scan_window; 5816 hci_stack->le_scanning_param_update = true; 5817 hci_run(); 5818 } 5819 5820 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5821 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5822 } 5823 5824 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5825 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5826 if (!conn){ 5827 // disallow if le connection is already outgoing 5828 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5829 log_error("le connection already active"); 5830 return ERROR_CODE_COMMAND_DISALLOWED; 5831 } 5832 5833 log_info("gap_connect: no connection exists yet, creating context"); 5834 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5835 if (!conn){ 5836 // notify client that alloc failed 5837 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5838 log_info("gap_connect: failed to alloc hci_connection_t"); 5839 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5840 } 5841 5842 // set le connecting state 5843 if (hci_is_le_connection_type(addr_type)){ 5844 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5845 } 5846 5847 conn->state = SEND_CREATE_CONNECTION; 5848 log_info("gap_connect: send create connection next"); 5849 hci_run(); 5850 return ERROR_CODE_SUCCESS; 5851 } 5852 5853 if (!hci_is_le_connection(conn) || 5854 (conn->state == SEND_CREATE_CONNECTION) || 5855 (conn->state == SENT_CREATE_CONNECTION)) { 5856 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5857 log_error("gap_connect: classic connection or connect is already being created"); 5858 return GATT_CLIENT_IN_WRONG_STATE; 5859 } 5860 5861 // check if connection was just disconnected 5862 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5863 log_info("gap_connect: send create connection (again)"); 5864 conn->state = SEND_CREATE_CONNECTION; 5865 hci_run(); 5866 return ERROR_CODE_SUCCESS; 5867 } 5868 5869 log_info("gap_connect: context exists with state %u", conn->state); 5870 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5871 hci_run(); 5872 return ERROR_CODE_SUCCESS; 5873 } 5874 5875 // @assumption: only a single outgoing LE Connection exists 5876 static hci_connection_t * gap_get_outgoing_connection(void){ 5877 btstack_linked_item_t *it; 5878 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5879 hci_connection_t * conn = (hci_connection_t *) it; 5880 if (!hci_is_le_connection(conn)) continue; 5881 switch (conn->state){ 5882 case SEND_CREATE_CONNECTION: 5883 case SENT_CREATE_CONNECTION: 5884 case SENT_CANCEL_CONNECTION: 5885 return conn; 5886 default: 5887 break; 5888 }; 5889 } 5890 return NULL; 5891 } 5892 5893 uint8_t gap_connect_cancel(void){ 5894 hci_connection_t * conn = gap_get_outgoing_connection(); 5895 if (!conn) return 0; 5896 switch (conn->state){ 5897 case SEND_CREATE_CONNECTION: 5898 // skip sending create connection and emit event instead 5899 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5900 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5901 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5902 btstack_memory_hci_connection_free( conn ); 5903 break; 5904 case SENT_CREATE_CONNECTION: 5905 // request to send cancel connection 5906 conn->state = SEND_CANCEL_CONNECTION; 5907 hci_run(); 5908 break; 5909 default: 5910 break; 5911 } 5912 return 0; 5913 } 5914 #endif 5915 5916 #ifdef ENABLE_LE_CENTRAL 5917 /** 5918 * @brief Set connection parameters for outgoing connections 5919 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5920 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5921 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5922 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5923 * @param conn_latency, default: 4 5924 * @param supervision_timeout (unit: 10ms), default: 720 ms 5925 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5926 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5927 */ 5928 5929 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5930 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5931 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5932 hci_stack->le_connection_scan_interval = conn_scan_interval; 5933 hci_stack->le_connection_scan_window = conn_scan_window; 5934 hci_stack->le_connection_interval_min = conn_interval_min; 5935 hci_stack->le_connection_interval_max = conn_interval_max; 5936 hci_stack->le_connection_latency = conn_latency; 5937 hci_stack->le_supervision_timeout = supervision_timeout; 5938 hci_stack->le_minimum_ce_length = min_ce_length; 5939 hci_stack->le_maximum_ce_length = max_ce_length; 5940 } 5941 #endif 5942 5943 /** 5944 * @brief Updates the connection parameters for a given LE connection 5945 * @param handle 5946 * @param conn_interval_min (unit: 1.25ms) 5947 * @param conn_interval_max (unit: 1.25ms) 5948 * @param conn_latency 5949 * @param supervision_timeout (unit: 10ms) 5950 * @returns 0 if ok 5951 */ 5952 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5953 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5954 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5955 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5956 connection->le_conn_interval_min = conn_interval_min; 5957 connection->le_conn_interval_max = conn_interval_max; 5958 connection->le_conn_latency = conn_latency; 5959 connection->le_supervision_timeout = supervision_timeout; 5960 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5961 hci_run(); 5962 return 0; 5963 } 5964 5965 /** 5966 * @brief Request an update of the connection parameter for a given LE connection 5967 * @param handle 5968 * @param conn_interval_min (unit: 1.25ms) 5969 * @param conn_interval_max (unit: 1.25ms) 5970 * @param conn_latency 5971 * @param supervision_timeout (unit: 10ms) 5972 * @returns 0 if ok 5973 */ 5974 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5975 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5976 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5977 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5978 connection->le_conn_interval_min = conn_interval_min; 5979 connection->le_conn_interval_max = conn_interval_max; 5980 connection->le_conn_latency = conn_latency; 5981 connection->le_supervision_timeout = supervision_timeout; 5982 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5983 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5984 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5985 return 0; 5986 } 5987 5988 #ifdef ENABLE_LE_PERIPHERAL 5989 5990 /** 5991 * @brief Set Advertisement Data 5992 * @param advertising_data_length 5993 * @param advertising_data (max 31 octets) 5994 * @note data is not copied, pointer has to stay valid 5995 */ 5996 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5997 hci_stack->le_advertisements_data_len = advertising_data_length; 5998 hci_stack->le_advertisements_data = advertising_data; 5999 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 6000 hci_run(); 6001 } 6002 6003 /** 6004 * @brief Set Scan Response Data 6005 * @param advertising_data_length 6006 * @param advertising_data (max 31 octets) 6007 * @note data is not copied, pointer has to stay valid 6008 */ 6009 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 6010 hci_stack->le_scan_response_data_len = scan_response_data_length; 6011 hci_stack->le_scan_response_data = scan_response_data; 6012 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 6013 hci_run(); 6014 } 6015 6016 /** 6017 * @brief Set Advertisement Parameters 6018 * @param adv_int_min 6019 * @param adv_int_max 6020 * @param adv_type 6021 * @param direct_address_type 6022 * @param direct_address 6023 * @param channel_map 6024 * @param filter_policy 6025 * 6026 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 6027 */ 6028 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 6029 uint8_t direct_address_typ, bd_addr_t direct_address, 6030 uint8_t channel_map, uint8_t filter_policy) { 6031 6032 hci_stack->le_advertisements_interval_min = adv_int_min; 6033 hci_stack->le_advertisements_interval_max = adv_int_max; 6034 hci_stack->le_advertisements_type = adv_type; 6035 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 6036 hci_stack->le_advertisements_channel_map = channel_map; 6037 hci_stack->le_advertisements_filter_policy = filter_policy; 6038 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 6039 6); 6040 6041 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 6042 hci_run(); 6043 } 6044 6045 /** 6046 * @brief Enable/Disable Advertisements 6047 * @param enabled 6048 */ 6049 void gap_advertisements_enable(int enabled){ 6050 hci_stack->le_advertisements_enabled = enabled != 0; 6051 hci_update_advertisements_enabled_for_current_roles(); 6052 hci_run(); 6053 } 6054 6055 #endif 6056 6057 void hci_le_set_own_address_type(uint8_t own_address_type){ 6058 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 6059 if (own_address_type == hci_stack->le_own_addr_type) return; 6060 hci_stack->le_own_addr_type = own_address_type; 6061 6062 #ifdef ENABLE_LE_PERIPHERAL 6063 // update advertisement parameters, too 6064 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 6065 hci_run(); 6066 #endif 6067 #ifdef ENABLE_LE_CENTRAL 6068 // note: we don't update scan parameters or modify ongoing connection attempts 6069 #endif 6070 } 6071 6072 #endif 6073 6074 uint8_t gap_disconnect(hci_con_handle_t handle){ 6075 hci_connection_t * conn = hci_connection_for_handle(handle); 6076 if (!conn){ 6077 hci_emit_disconnection_complete(handle, 0); 6078 return 0; 6079 } 6080 // ignore if already disconnected 6081 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 6082 return 0; 6083 } 6084 conn->state = SEND_DISCONNECT; 6085 hci_run(); 6086 return 0; 6087 } 6088 6089 int gap_read_rssi(hci_con_handle_t con_handle){ 6090 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6091 if (hci_connection == NULL) return 0; 6092 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 6093 hci_run(); 6094 return 1; 6095 } 6096 6097 /** 6098 * @brief Get connection type 6099 * @param con_handle 6100 * @result connection_type 6101 */ 6102 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 6103 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6104 if (!conn) return GAP_CONNECTION_INVALID; 6105 switch (conn->address_type){ 6106 case BD_ADDR_TYPE_LE_PUBLIC: 6107 case BD_ADDR_TYPE_LE_RANDOM: 6108 return GAP_CONNECTION_LE; 6109 case BD_ADDR_TYPE_SCO: 6110 return GAP_CONNECTION_SCO; 6111 case BD_ADDR_TYPE_ACL: 6112 return GAP_CONNECTION_ACL; 6113 default: 6114 return GAP_CONNECTION_INVALID; 6115 } 6116 } 6117 6118 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6119 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6120 if (!conn) return HCI_ROLE_INVALID; 6121 return (hci_role_t) conn->role; 6122 } 6123 6124 6125 #ifdef ENABLE_CLASSIC 6126 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6127 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6128 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6129 conn->request_role = role; 6130 hci_run(); 6131 return ERROR_CODE_SUCCESS; 6132 } 6133 #endif 6134 6135 #ifdef ENABLE_BLE 6136 6137 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){ 6138 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6139 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6140 6141 conn->le_phy_update_all_phys = all_phys; 6142 conn->le_phy_update_tx_phys = tx_phys; 6143 conn->le_phy_update_rx_phys = rx_phys; 6144 conn->le_phy_update_phy_options = phy_options; 6145 6146 hci_run(); 6147 6148 return 0; 6149 } 6150 6151 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6152 // check if already in list 6153 btstack_linked_list_iterator_t it; 6154 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6155 while (btstack_linked_list_iterator_has_next(&it)) { 6156 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6157 if (entry->address_type != address_type) { 6158 continue; 6159 } 6160 if (memcmp(entry->address, address, 6) != 0) { 6161 continue; 6162 } 6163 // disallow if already scheduled to add 6164 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6165 return ERROR_CODE_COMMAND_DISALLOWED; 6166 } 6167 // still on controller, but scheduled to remove -> re-add 6168 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6169 return ERROR_CODE_SUCCESS; 6170 } 6171 // alloc and add to list 6172 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6173 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6174 entry->address_type = address_type; 6175 (void)memcpy(entry->address, address, 6); 6176 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6177 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6178 return ERROR_CODE_SUCCESS; 6179 } 6180 6181 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6182 btstack_linked_list_iterator_t it; 6183 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6184 while (btstack_linked_list_iterator_has_next(&it)){ 6185 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6186 if (entry->address_type != address_type) { 6187 continue; 6188 } 6189 if (memcmp(entry->address, address, 6) != 0) { 6190 continue; 6191 } 6192 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6193 // remove from controller if already present 6194 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6195 } else { 6196 // directly remove entry from whitelist 6197 btstack_linked_list_iterator_remove(&it); 6198 btstack_memory_whitelist_entry_free(entry); 6199 } 6200 return ERROR_CODE_SUCCESS; 6201 } 6202 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6203 } 6204 6205 static void hci_whitelist_clear(void){ 6206 btstack_linked_list_iterator_t it; 6207 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6208 while (btstack_linked_list_iterator_has_next(&it)){ 6209 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6210 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6211 // remove from controller if already present 6212 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6213 continue; 6214 } 6215 // directly remove entry from whitelist 6216 btstack_linked_list_iterator_remove(&it); 6217 btstack_memory_whitelist_entry_free(entry); 6218 } 6219 } 6220 6221 /** 6222 * @brief Clear Whitelist 6223 * @returns 0 if ok 6224 */ 6225 uint8_t gap_whitelist_clear(void){ 6226 hci_whitelist_clear(); 6227 hci_run(); 6228 return ERROR_CODE_SUCCESS; 6229 } 6230 6231 /** 6232 * @brief Add Device to Whitelist 6233 * @param address_typ 6234 * @param address 6235 * @returns 0 if ok 6236 */ 6237 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6238 uint8_t status = hci_whitelist_add(address_type, address); 6239 if (status){ 6240 return status; 6241 } 6242 hci_run(); 6243 return ERROR_CODE_SUCCESS; 6244 } 6245 6246 /** 6247 * @brief Remove Device from Whitelist 6248 * @param address_typ 6249 * @param address 6250 * @returns 0 if ok 6251 */ 6252 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6253 uint8_t status = hci_whitelist_remove(address_type, address); 6254 if (status){ 6255 return status; 6256 } 6257 hci_run(); 6258 return ERROR_CODE_SUCCESS; 6259 } 6260 6261 #ifdef ENABLE_LE_CENTRAL 6262 /** 6263 * @brief Connect with Whitelist 6264 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6265 * @returns - if ok 6266 */ 6267 uint8_t gap_connect_with_whitelist(void){ 6268 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6269 return ERROR_CODE_COMMAND_DISALLOWED; 6270 } 6271 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6272 hci_run(); 6273 return ERROR_CODE_SUCCESS; 6274 } 6275 6276 /** 6277 * @brief Auto Connection Establishment - Start Connecting to device 6278 * @param address_typ 6279 * @param address 6280 * @returns 0 if ok 6281 */ 6282 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6283 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6284 return ERROR_CODE_COMMAND_DISALLOWED; 6285 } 6286 6287 uint8_t status = hci_whitelist_add(address_type, address); 6288 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6289 return status; 6290 } 6291 6292 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6293 6294 hci_run(); 6295 return ERROR_CODE_SUCCESS; 6296 } 6297 6298 /** 6299 * @brief Auto Connection Establishment - Stop Connecting to device 6300 * @param address_typ 6301 * @param address 6302 * @returns 0 if ok 6303 */ 6304 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6305 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6306 return ERROR_CODE_COMMAND_DISALLOWED; 6307 } 6308 6309 hci_whitelist_remove(address_type, address); 6310 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6311 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6312 } 6313 hci_run(); 6314 return 0; 6315 } 6316 6317 /** 6318 * @brief Auto Connection Establishment - Stop everything 6319 * @note Convenience function to stop all active auto connection attempts 6320 */ 6321 uint8_t gap_auto_connection_stop_all(void){ 6322 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6323 return ERROR_CODE_COMMAND_DISALLOWED; 6324 } 6325 hci_whitelist_clear(); 6326 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6327 hci_run(); 6328 return ERROR_CODE_SUCCESS; 6329 } 6330 6331 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6332 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6333 if (!conn) return 0; 6334 return conn->le_connection_interval; 6335 } 6336 #endif 6337 #endif 6338 6339 #ifdef ENABLE_CLASSIC 6340 /** 6341 * @brief Set Extended Inquiry Response data 6342 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6343 * @note has to be done before stack starts up 6344 */ 6345 void gap_set_extended_inquiry_response(const uint8_t * data){ 6346 hci_stack->eir_data = data; 6347 hci_stack->gap_tasks |= GAP_TASK_SET_EIR_DATA; 6348 hci_run(); 6349 } 6350 6351 /** 6352 * @brief Start GAP Classic Inquiry 6353 * @param duration in 1.28s units 6354 * @return 0 if ok 6355 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6356 */ 6357 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6358 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6359 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6360 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6361 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6362 } 6363 hci_stack->inquiry_state = duration_in_1280ms_units; 6364 hci_run(); 6365 return 0; 6366 } 6367 6368 /** 6369 * @brief Stop GAP Classic Inquiry 6370 * @returns 0 if ok 6371 */ 6372 int gap_inquiry_stop(void){ 6373 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6374 // emit inquiry complete event, before it even started 6375 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6376 hci_emit_event(event, sizeof(event), 1); 6377 return 0; 6378 } 6379 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6380 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6381 hci_run(); 6382 return 0; 6383 } 6384 6385 void gap_inquiry_set_lap(uint32_t lap){ 6386 hci_stack->inquiry_lap = lap; 6387 } 6388 6389 6390 /** 6391 * @brief Remote Name Request 6392 * @param addr 6393 * @param page_scan_repetition_mode 6394 * @param clock_offset only used when bit 15 is set 6395 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6396 */ 6397 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6398 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6399 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6400 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6401 hci_stack->remote_name_clock_offset = clock_offset; 6402 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6403 hci_run(); 6404 return 0; 6405 } 6406 6407 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6408 hci_stack->gap_pairing_state = state; 6409 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6410 hci_run(); 6411 return 0; 6412 } 6413 6414 /** 6415 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6416 * @param addr 6417 * @param pin_data 6418 * @param pin_len 6419 * @return 0 if ok 6420 */ 6421 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6422 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6423 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6424 hci_stack->gap_pairing_pin_len = pin_len; 6425 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6426 } 6427 6428 /** 6429 * @brief Legacy Pairing Pin Code Response 6430 * @param addr 6431 * @param pin 6432 * @return 0 if ok 6433 */ 6434 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6435 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6436 } 6437 6438 /** 6439 * @brief Abort Legacy Pairing 6440 * @param addr 6441 * @param pin 6442 * @return 0 if ok 6443 */ 6444 int gap_pin_code_negative(bd_addr_t addr){ 6445 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6446 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6447 } 6448 6449 /** 6450 * @brief SSP Passkey Response 6451 * @param addr 6452 * @param passkey 6453 * @return 0 if ok 6454 */ 6455 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6456 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6457 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6458 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6459 } 6460 6461 /** 6462 * @brief Abort SSP Passkey Entry/Pairing 6463 * @param addr 6464 * @param pin 6465 * @return 0 if ok 6466 */ 6467 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6468 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6469 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6470 } 6471 6472 /** 6473 * @brief Accept SSP Numeric Comparison 6474 * @param addr 6475 * @param passkey 6476 * @return 0 if ok 6477 */ 6478 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6479 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6480 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6481 } 6482 6483 /** 6484 * @brief Abort SSP Numeric Comparison/Pairing 6485 * @param addr 6486 * @param pin 6487 * @return 0 if ok 6488 */ 6489 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6490 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6491 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6492 } 6493 6494 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6495 6496 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6497 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6498 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6499 connectionSetAuthenticationFlags(conn, flag); 6500 hci_run(); 6501 return ERROR_CODE_SUCCESS; 6502 } 6503 6504 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6505 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6506 } 6507 6508 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6509 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6510 } 6511 #endif 6512 6513 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6514 /** 6515 * @brief Report Remote OOB Data 6516 * @param bd_addr 6517 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6518 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6519 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6520 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6521 */ 6522 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){ 6523 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6524 if (connection == NULL) { 6525 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6526 } 6527 connection->classic_oob_c_192 = c_192; 6528 connection->classic_oob_r_192 = r_192; 6529 6530 // ignore P-256 if not supported by us 6531 if (hci_stack->secure_connections_active){ 6532 connection->classic_oob_c_256 = c_256; 6533 connection->classic_oob_r_256 = r_256; 6534 } 6535 6536 return ERROR_CODE_SUCCESS; 6537 } 6538 /** 6539 * @brief Generate new OOB data 6540 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6541 */ 6542 void gap_ssp_generate_oob_data(void){ 6543 hci_stack->classic_read_local_oob_data = true; 6544 hci_run(); 6545 } 6546 6547 #endif 6548 6549 /** 6550 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6551 * @param inquiry_mode see bluetooth_defines.h 6552 */ 6553 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6554 hci_stack->inquiry_mode = inquiry_mode; 6555 } 6556 6557 /** 6558 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6559 */ 6560 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6561 hci_stack->sco_voice_setting = voice_setting; 6562 } 6563 6564 /** 6565 * @brief Get SCO Voice Setting 6566 * @return current voice setting 6567 */ 6568 uint16_t hci_get_sco_voice_setting(void){ 6569 return hci_stack->sco_voice_setting; 6570 } 6571 6572 static int hci_have_usb_transport(void){ 6573 if (!hci_stack->hci_transport) return 0; 6574 const char * transport_name = hci_stack->hci_transport->name; 6575 if (!transport_name) return 0; 6576 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6577 } 6578 6579 /** @brief Get SCO packet length for current SCO Voice setting 6580 * @note Using SCO packets of the exact length is required for USB transfer 6581 * @return Length of SCO packets in bytes (not audio frames) 6582 */ 6583 uint16_t hci_get_sco_packet_length(void){ 6584 uint16_t sco_packet_length = 0; 6585 6586 #ifdef ENABLE_SCO_OVER_HCI 6587 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6588 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6589 6590 if (hci_have_usb_transport()){ 6591 // see Core Spec for H2 USB Transfer. 6592 // 3 byte SCO header + 24 bytes per connection 6593 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6594 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6595 } else { 6596 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6597 sco_packet_length = 3 + 60 * multiplier; 6598 // assert that it still fits inside an SCO buffer 6599 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6600 sco_packet_length = 3 + 60; 6601 } 6602 } 6603 #endif 6604 6605 #ifdef HAVE_SCO_TRANSPORT 6606 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6607 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6608 sco_packet_length = 3 + 60 * multiplier; 6609 #endif 6610 return sco_packet_length; 6611 } 6612 6613 /** 6614 * @brief Sets the master/slave policy 6615 * @param policy (0: attempt to become master, 1: let connecting device decide) 6616 */ 6617 void hci_set_master_slave_policy(uint8_t policy){ 6618 hci_stack->master_slave_policy = policy; 6619 } 6620 6621 #endif 6622 6623 HCI_STATE hci_get_state(void){ 6624 return hci_stack->state; 6625 } 6626 6627 #ifdef ENABLE_CLASSIC 6628 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6629 hci_stack->gap_classic_accept_callback = accept_callback; 6630 } 6631 #endif 6632 6633 /** 6634 * @brief Set callback for Bluetooth Hardware Error 6635 */ 6636 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6637 hci_stack->hardware_error_callback = fn; 6638 } 6639 6640 void hci_disconnect_all(void){ 6641 btstack_linked_list_iterator_t it; 6642 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6643 while (btstack_linked_list_iterator_has_next(&it)){ 6644 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6645 if (con->state == SENT_DISCONNECT) continue; 6646 con->state = SEND_DISCONNECT; 6647 } 6648 hci_run(); 6649 } 6650 6651 uint16_t hci_get_manufacturer(void){ 6652 return hci_stack->manufacturer; 6653 } 6654 6655 #ifdef ENABLE_BLE 6656 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6657 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6658 if (!hci_con) return NULL; 6659 return &hci_con->sm_connection; 6660 } 6661 6662 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6663 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6664 #endif 6665 6666 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6667 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6668 if (hci_connection == NULL) return 0; 6669 if (hci_is_le_connection(hci_connection)){ 6670 #ifdef ENABLE_BLE 6671 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6672 if (sm_conn->sm_connection_encrypted) { 6673 return sm_conn->sm_actual_encryption_key_size; 6674 } 6675 #endif 6676 } else { 6677 #ifdef ENABLE_CLASSIC 6678 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6679 return hci_connection->encryption_key_size; 6680 } 6681 #endif 6682 } 6683 return 0; 6684 } 6685 6686 int gap_authenticated(hci_con_handle_t con_handle){ 6687 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6688 if (hci_connection == NULL) return 0; 6689 6690 switch (hci_connection->address_type){ 6691 #ifdef ENABLE_BLE 6692 case BD_ADDR_TYPE_LE_PUBLIC: 6693 case BD_ADDR_TYPE_LE_RANDOM: 6694 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6695 return hci_connection->sm_connection.sm_connection_authenticated; 6696 #endif 6697 #ifdef ENABLE_CLASSIC 6698 case BD_ADDR_TYPE_SCO: 6699 case BD_ADDR_TYPE_ACL: 6700 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6701 #endif 6702 default: 6703 return 0; 6704 } 6705 } 6706 6707 int gap_secure_connection(hci_con_handle_t con_handle){ 6708 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6709 if (hci_connection == NULL) return 0; 6710 6711 switch (hci_connection->address_type){ 6712 #ifdef ENABLE_BLE 6713 case BD_ADDR_TYPE_LE_PUBLIC: 6714 case BD_ADDR_TYPE_LE_RANDOM: 6715 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6716 return hci_connection->sm_connection.sm_connection_sc; 6717 #endif 6718 #ifdef ENABLE_CLASSIC 6719 case BD_ADDR_TYPE_SCO: 6720 case BD_ADDR_TYPE_ACL: 6721 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6722 #endif 6723 default: 6724 return 0; 6725 } 6726 } 6727 6728 bool gap_bonded(hci_con_handle_t con_handle){ 6729 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6730 if (hci_connection == NULL) return 0; 6731 6732 #ifdef ENABLE_CLASSIC 6733 link_key_t link_key; 6734 link_key_type_t link_key_type; 6735 #endif 6736 switch (hci_connection->address_type){ 6737 #ifdef ENABLE_BLE 6738 case BD_ADDR_TYPE_LE_PUBLIC: 6739 case BD_ADDR_TYPE_LE_RANDOM: 6740 return hci_connection->sm_connection.sm_le_db_index >= 0; 6741 #endif 6742 #ifdef ENABLE_CLASSIC 6743 case BD_ADDR_TYPE_SCO: 6744 case BD_ADDR_TYPE_ACL: 6745 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6746 #endif 6747 default: 6748 return false; 6749 } 6750 } 6751 6752 #ifdef ENABLE_BLE 6753 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6754 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6755 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6756 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6757 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6758 return sm_conn->sm_connection_authorization_state; 6759 } 6760 #endif 6761 6762 #ifdef ENABLE_CLASSIC 6763 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){ 6764 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6765 if (!conn) return GAP_CONNECTION_INVALID; 6766 conn->sniff_min_interval = sniff_min_interval; 6767 conn->sniff_max_interval = sniff_max_interval; 6768 conn->sniff_attempt = sniff_attempt; 6769 conn->sniff_timeout = sniff_timeout; 6770 hci_run(); 6771 return 0; 6772 } 6773 6774 /** 6775 * @brief Exit Sniff mode 6776 * @param con_handle 6777 @ @return 0 if ok 6778 */ 6779 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6780 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6781 if (!conn) return GAP_CONNECTION_INVALID; 6782 conn->sniff_min_interval = 0xffff; 6783 hci_run(); 6784 return 0; 6785 } 6786 6787 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){ 6788 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6789 if (!conn) return GAP_CONNECTION_INVALID; 6790 conn->sniff_subrating_max_latency = max_latency; 6791 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6792 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6793 hci_run(); 6794 return ERROR_CODE_SUCCESS; 6795 } 6796 6797 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){ 6798 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6799 if (!conn) return GAP_CONNECTION_INVALID; 6800 conn->qos_service_type = service_type; 6801 conn->qos_token_rate = token_rate; 6802 conn->qos_peak_bandwidth = peak_bandwidth; 6803 conn->qos_latency = latency; 6804 conn->qos_delay_variation = delay_variation; 6805 hci_run(); 6806 return ERROR_CODE_SUCCESS; 6807 } 6808 6809 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6810 hci_stack->new_page_scan_interval = page_scan_interval; 6811 hci_stack->new_page_scan_window = page_scan_window; 6812 hci_run(); 6813 } 6814 6815 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6816 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6817 hci_run(); 6818 } 6819 6820 #endif 6821 6822 void hci_halting_defer(void){ 6823 if (hci_stack->state != HCI_STATE_HALTING) return; 6824 switch (hci_stack->substate){ 6825 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6826 case HCI_HALTING_CLOSE: 6827 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6828 break; 6829 default: 6830 break; 6831 } 6832 } 6833 6834 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6835 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6836 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6837 if (le_device_db_index >= le_device_db_max_count()) return; 6838 uint8_t offset = le_device_db_index >> 3; 6839 uint8_t mask = 1 << (le_device_db_index & 7); 6840 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6841 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6842 // note: go back to remove entries, otherwise, a remove + add will skip the add 6843 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6844 } 6845 } 6846 6847 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6848 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6849 if (le_device_db_index >= le_device_db_max_count()) return; 6850 uint8_t offset = le_device_db_index >> 3; 6851 uint8_t mask = 1 << (le_device_db_index & 7); 6852 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6853 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6854 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6855 } 6856 } 6857 6858 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6859 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6860 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6861 } 6862 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6863 // restart le resolving list update 6864 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6865 } 6866 return ERROR_CODE_SUCCESS; 6867 } 6868 #endif 6869 6870 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6871 void hci_setup_test_connections_fuzz(void){ 6872 hci_connection_t * conn; 6873 6874 // default address: 66:55:44:33:00:01 6875 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6876 6877 // setup Controller info 6878 hci_stack->num_cmd_packets = 255; 6879 hci_stack->acl_packets_total_num = 255; 6880 6881 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6882 addr[5] = 0x01; 6883 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6884 conn->con_handle = addr[5]; 6885 conn->role = HCI_ROLE_SLAVE; 6886 conn->state = RECEIVED_CONNECTION_REQUEST; 6887 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6888 6889 // setup incoming Classic SCO connection with con handle 0x0002 6890 addr[5] = 0x02; 6891 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6892 conn->con_handle = addr[5]; 6893 conn->role = HCI_ROLE_SLAVE; 6894 conn->state = RECEIVED_CONNECTION_REQUEST; 6895 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6896 6897 // setup ready Classic ACL connection with con handle 0x0003 6898 addr[5] = 0x03; 6899 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6900 conn->con_handle = addr[5]; 6901 conn->role = HCI_ROLE_SLAVE; 6902 conn->state = OPEN; 6903 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6904 6905 // setup ready Classic SCO connection with con handle 0x0004 6906 addr[5] = 0x04; 6907 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6908 conn->con_handle = addr[5]; 6909 conn->role = HCI_ROLE_SLAVE; 6910 conn->state = OPEN; 6911 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6912 6913 // setup ready LE ACL connection with con handle 0x005 and public address 6914 addr[5] = 0x05; 6915 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6916 conn->con_handle = addr[5]; 6917 conn->role = HCI_ROLE_SLAVE; 6918 conn->state = OPEN; 6919 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6920 conn->sm_connection.sm_connection_encrypted = 1; 6921 } 6922 6923 void hci_free_connections_fuzz(void){ 6924 btstack_linked_list_iterator_t it; 6925 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6926 while (btstack_linked_list_iterator_has_next(&it)){ 6927 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6928 btstack_linked_list_iterator_remove(&it); 6929 btstack_memory_hci_connection_free(con); 6930 } 6931 } 6932 void hci_simulate_working_fuzz(void){ 6933 hci_init_done(); 6934 hci_stack->num_cmd_packets = 255; 6935 } 6936 #endif 6937