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 6 137 138 139 // 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 int 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 reverse_bd_addr(hci_connection->address, &event[2]); 419 little_endian_store_16(event, 8, (uint16_t) hci_connection->con_handle); 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 if (!hci_pairing_active(hci_connection)) return; 427 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 428 log_info("pairing complete, status %02x", status); 429 430 uint8_t event[12]; 431 event[0] = GAP_EVENT_PAIRING_COMPLETE; 432 event[1] = 9; 433 reverse_bd_addr(hci_connection->address, &event[2]); 434 little_endian_store_16(event, 8, (uint16_t) hci_connection->con_handle); 435 event[10] = status; 436 hci_emit_event(event, sizeof(event), 1); 437 } 438 439 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 440 hci_connection_t * conn = hci_connection_for_handle(handle); 441 if (!conn) return 0; 442 return (int) hci_pairing_active(conn); 443 } 444 445 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 446 if (!hci_stack->link_key_db) return; 447 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 448 hci_stack->link_key_db->delete_link_key(addr); 449 } 450 451 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 452 if (!hci_stack->link_key_db) return; 453 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 454 hci_stack->link_key_db->put_link_key(addr, link_key, type); 455 } 456 457 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 458 if (!hci_stack->link_key_db) return false; 459 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 460 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 461 return result; 462 } 463 464 void gap_delete_all_link_keys(void){ 465 bd_addr_t addr; 466 link_key_t link_key; 467 link_key_type_t type; 468 btstack_link_key_iterator_t it; 469 int ok = gap_link_key_iterator_init(&it); 470 if (!ok) { 471 log_error("could not initialize iterator"); 472 return; 473 } 474 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 475 gap_drop_link_key_for_bd_addr(addr); 476 } 477 gap_link_key_iterator_done(&it); 478 } 479 480 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 481 if (!hci_stack->link_key_db) return 0; 482 if (!hci_stack->link_key_db->iterator_init) return 0; 483 return hci_stack->link_key_db->iterator_init(it); 484 } 485 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){ 486 if (!hci_stack->link_key_db) return 0; 487 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 488 } 489 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 490 if (!hci_stack->link_key_db) return; 491 hci_stack->link_key_db->iterator_done(it); 492 } 493 #endif 494 495 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 496 switch (address_type){ 497 case BD_ADDR_TYPE_LE_PUBLIC: 498 case BD_ADDR_TYPE_LE_RANDOM: 499 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 501 return true; 502 default: 503 return false; 504 } 505 } 506 507 static int hci_is_le_connection(hci_connection_t * connection){ 508 return hci_is_le_connection_type(connection->address_type); 509 } 510 511 /** 512 * count connections 513 */ 514 static int nr_hci_connections(void){ 515 int count = 0; 516 btstack_linked_item_t *it; 517 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 518 count++; 519 } 520 return count; 521 } 522 523 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 524 525 unsigned int num_packets_sent_classic = 0; 526 unsigned int num_packets_sent_le = 0; 527 528 btstack_linked_item_t *it; 529 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 530 hci_connection_t * connection = (hci_connection_t *) it; 531 if (hci_is_le_connection(connection)){ 532 num_packets_sent_le += connection->num_packets_sent; 533 } 534 if (connection->address_type == BD_ADDR_TYPE_ACL){ 535 num_packets_sent_classic += connection->num_packets_sent; 536 } 537 } 538 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 539 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 540 int free_slots_le = 0; 541 542 if (free_slots_classic < 0){ 543 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); 544 return 0; 545 } 546 547 if (hci_stack->le_acl_packets_total_num){ 548 // if we have LE slots, they are used 549 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 550 if (free_slots_le < 0){ 551 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); 552 return 0; 553 } 554 } else { 555 // otherwise, classic slots are used for LE, too 556 free_slots_classic -= num_packets_sent_le; 557 if (free_slots_classic < 0){ 558 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); 559 return 0; 560 } 561 } 562 563 switch (address_type){ 564 case BD_ADDR_TYPE_UNKNOWN: 565 log_error("hci_number_free_acl_slots: unknown address type"); 566 return 0; 567 568 case BD_ADDR_TYPE_ACL: 569 return free_slots_classic; 570 571 default: 572 if (hci_stack->le_acl_packets_total_num){ 573 return free_slots_le; 574 } 575 return free_slots_classic; 576 } 577 } 578 579 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 580 // get connection type 581 hci_connection_t * connection = hci_connection_for_handle(con_handle); 582 if (!connection){ 583 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 584 return 0; 585 } 586 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 587 } 588 589 #ifdef ENABLE_CLASSIC 590 static int hci_number_free_sco_slots(void){ 591 unsigned int num_sco_packets_sent = 0; 592 btstack_linked_item_t *it; 593 if (hci_stack->synchronous_flow_control_enabled){ 594 // explicit flow control 595 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 596 hci_connection_t * connection = (hci_connection_t *) it; 597 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 598 num_sco_packets_sent += connection->num_packets_sent; 599 } 600 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 601 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 602 return 0; 603 } 604 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 605 } else { 606 // implicit flow control -- TODO 607 int num_ready = 0; 608 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 609 hci_connection_t * connection = (hci_connection_t *) it; 610 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 611 if (connection->sco_tx_ready == 0) continue; 612 num_ready++; 613 } 614 return num_ready; 615 } 616 } 617 #endif 618 619 // only used to send HCI Host Number Completed Packets 620 static int hci_can_send_comand_packet_transport(void){ 621 if (hci_stack->hci_packet_buffer_reserved) return 0; 622 623 // check for async hci transport implementations 624 if (hci_stack->hci_transport->can_send_packet_now){ 625 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 626 return 0; 627 } 628 } 629 return 1; 630 } 631 632 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 633 int hci_can_send_command_packet_now(void){ 634 if (hci_can_send_comand_packet_transport() == 0) return 0; 635 return hci_stack->num_cmd_packets > 0u; 636 } 637 638 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 639 // check for async hci transport implementations 640 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 641 return hci_stack->hci_transport->can_send_packet_now(packet_type); 642 } 643 644 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 645 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 646 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 647 } 648 649 int hci_can_send_acl_le_packet_now(void){ 650 if (hci_stack->hci_packet_buffer_reserved) return 0; 651 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 652 } 653 654 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 655 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 656 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 657 } 658 659 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 660 if (hci_stack->hci_packet_buffer_reserved) return 0; 661 return hci_can_send_prepared_acl_packet_now(con_handle); 662 } 663 664 #ifdef ENABLE_CLASSIC 665 int hci_can_send_acl_classic_packet_now(void){ 666 if (hci_stack->hci_packet_buffer_reserved) return 0; 667 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 668 } 669 670 int hci_can_send_prepared_sco_packet_now(void){ 671 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 672 if (hci_have_usb_transport()){ 673 return hci_stack->sco_can_send_now; 674 } else { 675 return hci_number_free_sco_slots() > 0; 676 } 677 } 678 679 int hci_can_send_sco_packet_now(void){ 680 if (hci_stack->hci_packet_buffer_reserved) return 0; 681 return hci_can_send_prepared_sco_packet_now(); 682 } 683 684 void hci_request_sco_can_send_now_event(void){ 685 hci_stack->sco_waiting_for_can_send_now = 1; 686 hci_notify_if_sco_can_send_now(); 687 } 688 #endif 689 690 // used for internal checks in l2cap.c 691 int hci_is_packet_buffer_reserved(void){ 692 return hci_stack->hci_packet_buffer_reserved; 693 } 694 695 // reserves outgoing packet buffer. @returns 1 if successful 696 int hci_reserve_packet_buffer(void){ 697 if (hci_stack->hci_packet_buffer_reserved) { 698 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 699 return 0; 700 } 701 hci_stack->hci_packet_buffer_reserved = 1; 702 return 1; 703 } 704 705 void hci_release_packet_buffer(void){ 706 hci_stack->hci_packet_buffer_reserved = 0; 707 } 708 709 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 710 static int hci_transport_synchronous(void){ 711 return hci_stack->hci_transport->can_send_packet_now == NULL; 712 } 713 714 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 715 716 // 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); 717 718 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 719 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 720 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 721 max_acl_data_packet_length = hci_stack->le_data_packets_length; 722 } 723 724 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 725 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 726 max_acl_data_packet_length = connection->le_max_tx_octets; 727 } 728 #endif 729 730 log_debug("hci_send_acl_packet_fragments entered"); 731 732 int err; 733 // multiple packets could be send on a synchronous HCI transport 734 while (true){ 735 736 log_debug("hci_send_acl_packet_fragments loop entered"); 737 738 // get current data 739 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 740 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 741 bool more_fragments = false; 742 743 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 744 if (current_acl_data_packet_length > max_acl_data_packet_length){ 745 more_fragments = true; 746 current_acl_data_packet_length = max_acl_data_packet_length; 747 } 748 749 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 750 if (acl_header_pos > 0u){ 751 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 752 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 753 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 754 } 755 756 // update header len 757 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 758 759 // count packet 760 connection->num_packets_sent++; 761 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 762 763 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 764 if (more_fragments){ 765 // update start of next fragment to send 766 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 767 } else { 768 // done 769 hci_stack->acl_fragmentation_pos = 0; 770 hci_stack->acl_fragmentation_total_size = 0; 771 } 772 773 // send packet 774 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 775 const int size = current_acl_data_packet_length + 4; 776 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 777 hci_stack->acl_fragmentation_tx_active = 1; 778 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 779 780 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 781 782 // done yet? 783 if (!more_fragments) break; 784 785 // can send more? 786 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 787 } 788 789 log_debug("hci_send_acl_packet_fragments loop over"); 790 791 // release buffer now for synchronous transport 792 if (hci_transport_synchronous()){ 793 hci_stack->acl_fragmentation_tx_active = 0; 794 hci_release_packet_buffer(); 795 hci_emit_transport_packet_sent(); 796 } 797 798 return err; 799 } 800 801 // pre: caller has reserved the packet buffer 802 int hci_send_acl_packet_buffer(int size){ 803 804 // log_info("hci_send_acl_packet_buffer size %u", size); 805 806 if (!hci_stack->hci_packet_buffer_reserved) { 807 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 808 return 0; 809 } 810 811 uint8_t * packet = hci_stack->hci_packet_buffer; 812 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 813 814 // check for free places on Bluetooth module 815 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 816 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return BTSTACK_ACL_BUFFERS_FULL; 820 } 821 822 hci_connection_t *connection = hci_connection_for_handle( con_handle); 823 if (!connection) { 824 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 825 hci_release_packet_buffer(); 826 hci_emit_transport_packet_sent(); 827 return 0; 828 } 829 830 #ifdef ENABLE_CLASSIC 831 hci_connection_timestamp(connection); 832 #endif 833 834 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 835 836 // setup data 837 hci_stack->acl_fragmentation_total_size = size; 838 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 839 840 return hci_send_acl_packet_fragments(connection); 841 } 842 843 #ifdef ENABLE_CLASSIC 844 // pre: caller has reserved the packet buffer 845 int hci_send_sco_packet_buffer(int size){ 846 847 // log_info("hci_send_acl_packet_buffer size %u", size); 848 849 if (!hci_stack->hci_packet_buffer_reserved) { 850 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 851 return 0; 852 } 853 854 uint8_t * packet = hci_stack->hci_packet_buffer; 855 856 // skip checks in loopback mode 857 if (!hci_stack->loopback_mode){ 858 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 859 860 // check for free places on Bluetooth module 861 if (!hci_can_send_prepared_sco_packet_now()) { 862 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 863 hci_release_packet_buffer(); 864 hci_emit_transport_packet_sent(); 865 return BTSTACK_ACL_BUFFERS_FULL; 866 } 867 868 // track send packet in connection struct 869 hci_connection_t *connection = hci_connection_for_handle( con_handle); 870 if (!connection) { 871 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 872 hci_release_packet_buffer(); 873 hci_emit_transport_packet_sent(); 874 return 0; 875 } 876 877 if (hci_have_usb_transport()){ 878 // token used 879 hci_stack->sco_can_send_now = 0; 880 } else { 881 if (hci_stack->synchronous_flow_control_enabled){ 882 connection->num_packets_sent++; 883 } else { 884 connection->sco_tx_ready--; 885 } 886 } 887 } 888 889 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 890 891 #ifdef HAVE_SCO_TRANSPORT 892 hci_stack->sco_transport->send_packet(packet, size); 893 hci_release_packet_buffer(); 894 hci_emit_transport_packet_sent(); 895 896 return 0; 897 #else 898 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 899 if (hci_transport_synchronous()){ 900 hci_release_packet_buffer(); 901 hci_emit_transport_packet_sent(); 902 } 903 904 return err; 905 #endif 906 } 907 #endif 908 909 static void acl_handler(uint8_t *packet, uint16_t size){ 910 911 // get info 912 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 913 hci_connection_t *conn = hci_connection_for_handle(con_handle); 914 uint8_t acl_flags = READ_ACL_FLAGS(packet); 915 uint16_t acl_length = READ_ACL_LENGTH(packet); 916 917 // ignore non-registered handle 918 if (!conn){ 919 log_error("acl_handler called with non-registered handle %u!" , con_handle); 920 return; 921 } 922 923 // assert packet is complete 924 if ((acl_length + 4u) != size){ 925 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 926 return; 927 } 928 929 #ifdef ENABLE_CLASSIC 930 // update idle timestamp 931 hci_connection_timestamp(conn); 932 #endif 933 934 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 935 hci_stack->host_completed_packets = 1; 936 conn->num_packets_completed++; 937 #endif 938 939 // handle different packet types 940 switch (acl_flags & 0x03u) { 941 942 case 0x01: // continuation fragment 943 944 // sanity checks 945 if (conn->acl_recombination_pos == 0u) { 946 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 947 return; 948 } 949 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 950 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 951 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 952 conn->acl_recombination_pos = 0; 953 return; 954 } 955 956 // append fragment payload (header already stored) 957 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 958 &packet[4], acl_length); 959 conn->acl_recombination_pos += acl_length; 960 961 // forward complete L2CAP packet if complete. 962 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 963 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 964 // reset recombination buffer 965 conn->acl_recombination_length = 0; 966 conn->acl_recombination_pos = 0; 967 } 968 break; 969 970 case 0x02: { // first fragment 971 972 // sanity check 973 if (conn->acl_recombination_pos) { 974 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 975 conn->acl_recombination_pos = 0; 976 } 977 978 // peek into L2CAP packet! 979 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 980 981 // compare fragment size to L2CAP packet size 982 if (acl_length >= (l2cap_length + 4u)){ 983 // forward fragment as L2CAP packet 984 hci_emit_acl_packet(packet, acl_length + 4u); 985 } else { 986 987 if (acl_length > HCI_ACL_BUFFER_SIZE){ 988 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 989 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 990 return; 991 } 992 993 // store first fragment and tweak acl length for complete package 994 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 995 packet, acl_length + 4u); 996 conn->acl_recombination_pos = acl_length + 4u; 997 conn->acl_recombination_length = l2cap_length; 998 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 999 } 1000 break; 1001 1002 } 1003 default: 1004 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1005 return; 1006 } 1007 1008 // execute main loop 1009 hci_run(); 1010 } 1011 1012 static void hci_shutdown_connection(hci_connection_t *conn){ 1013 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1014 1015 #ifdef ENABLE_CLASSIC 1016 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1017 bd_addr_type_t addr_type = conn->address_type; 1018 #endif 1019 #ifdef HAVE_SCO_TRANSPORT 1020 hci_con_handle_t con_handle = conn->con_handle; 1021 #endif 1022 #endif 1023 1024 btstack_run_loop_remove_timer(&conn->timeout); 1025 1026 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1027 btstack_memory_hci_connection_free( conn ); 1028 1029 // now it's gone 1030 hci_emit_nr_connections_changed(); 1031 1032 #ifdef ENABLE_CLASSIC 1033 #ifdef ENABLE_SCO_OVER_HCI 1034 // update SCO 1035 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1036 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1037 } 1038 #endif 1039 #ifdef HAVE_SCO_TRANSPORT 1040 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1041 hci_stack->sco_transport->close(con_handle); 1042 } 1043 #endif 1044 #endif 1045 } 1046 1047 #ifdef ENABLE_CLASSIC 1048 1049 static const uint16_t packet_type_sizes[] = { 1050 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1051 HCI_ACL_DH1_SIZE, 0, 0, 0, 1052 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1053 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1054 }; 1055 static const uint8_t packet_type_feature_requirement_bit[] = { 1056 0, // 3 slot packets 1057 1, // 5 slot packets 1058 25, // EDR 2 mpbs 1059 26, // EDR 3 mbps 1060 39, // 3 slot EDR packts 1061 40, // 5 slot EDR packet 1062 }; 1063 static const uint16_t packet_type_feature_packet_mask[] = { 1064 0x0f00, // 3 slot packets 1065 0xf000, // 5 slot packets 1066 0x1102, // EDR 2 mpbs 1067 0x2204, // EDR 3 mbps 1068 0x0300, // 3 slot EDR packts 1069 0x3000, // 5 slot EDR packet 1070 }; 1071 1072 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1073 // enable packet types based on size 1074 uint16_t packet_types = 0; 1075 unsigned int i; 1076 for (i=0;i<16;i++){ 1077 if (packet_type_sizes[i] == 0) continue; 1078 if (packet_type_sizes[i] <= buffer_size){ 1079 packet_types |= 1 << i; 1080 } 1081 } 1082 // disable packet types due to missing local supported features 1083 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1084 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1085 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1086 if (feature_set) continue; 1087 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1088 packet_types &= ~packet_type_feature_packet_mask[i]; 1089 } 1090 // flip bits for "may not be used" 1091 packet_types ^= 0x3306; 1092 return packet_types; 1093 } 1094 1095 uint16_t hci_usable_acl_packet_types(void){ 1096 return hci_stack->packet_types; 1097 } 1098 #endif 1099 1100 uint8_t* hci_get_outgoing_packet_buffer(void){ 1101 // hci packet buffer is >= acl data packet length 1102 return hci_stack->hci_packet_buffer; 1103 } 1104 1105 uint16_t hci_max_acl_data_packet_length(void){ 1106 return hci_stack->acl_data_packet_length; 1107 } 1108 1109 #ifdef ENABLE_CLASSIC 1110 int hci_extended_sco_link_supported(void){ 1111 // No. 31, byte 3, bit 7 1112 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1113 } 1114 #endif 1115 1116 int hci_non_flushable_packet_boundary_flag_supported(void){ 1117 // No. 54, byte 6, bit 6 1118 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1119 } 1120 1121 static int gap_ssp_supported(void){ 1122 // No. 51, byte 6, bit 3 1123 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1124 } 1125 1126 static int hci_classic_supported(void){ 1127 #ifdef ENABLE_CLASSIC 1128 // No. 37, byte 4, bit 5, = No BR/EDR Support 1129 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1130 #else 1131 return 0; 1132 #endif 1133 } 1134 1135 static int hci_le_supported(void){ 1136 #ifdef ENABLE_BLE 1137 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1138 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1139 #else 1140 return 0; 1141 #endif 1142 } 1143 1144 #ifdef ENABLE_BLE 1145 1146 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1147 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1148 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1149 } else { 1150 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1151 } 1152 } 1153 1154 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1155 *addr_type = hci_stack->le_own_addr_type; 1156 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1157 } 1158 1159 #ifdef ENABLE_LE_PERIPHERAL 1160 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1161 *addr_type = hci_stack->le_advertisements_own_addr_type; 1162 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1163 }; 1164 #endif 1165 1166 #ifdef ENABLE_LE_CENTRAL 1167 1168 /** 1169 * @brief Get own addr type and address used for LE connections (Central) 1170 */ 1171 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1172 *addr_type = hci_stack->le_connection_own_addr_type; 1173 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1174 } 1175 1176 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1177 1178 int offset = 3; 1179 int num_reports = packet[offset]; 1180 offset += 1; 1181 1182 int i; 1183 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1184 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1185 for (i=0; (i<num_reports) && (offset < size);i++){ 1186 // sanity checks on data_length: 1187 uint8_t data_length = packet[offset + 8]; 1188 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1189 if ((offset + 9u + data_length + 1u) > size) return; 1190 // setup event 1191 uint8_t event_size = 10u + data_length; 1192 int pos = 0; 1193 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1194 event[pos++] = event_size; 1195 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1196 offset += 8; 1197 pos += 8; 1198 event[pos++] = packet[offset + 1 + data_length]; // rssi 1199 event[pos++] = data_length; 1200 offset++; 1201 (void)memcpy(&event[pos], &packet[offset], data_length); 1202 pos += data_length; 1203 offset += data_length + 1u; // rssi 1204 hci_emit_event(event, pos, 1); 1205 } 1206 } 1207 #endif 1208 #endif 1209 1210 #ifdef ENABLE_BLE 1211 #ifdef ENABLE_LE_PERIPHERAL 1212 static void hci_update_advertisements_enabled_for_current_roles(void){ 1213 if (hci_stack->le_advertisements_enabled){ 1214 // get number of active le slave connections 1215 int num_slave_connections = 0; 1216 btstack_linked_list_iterator_t it; 1217 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1218 while (btstack_linked_list_iterator_has_next(&it)){ 1219 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1220 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1221 if (con->state != OPEN) continue; 1222 if (con->role != HCI_ROLE_SLAVE) continue; 1223 if (!hci_is_le_connection(con)) continue; 1224 num_slave_connections++; 1225 } 1226 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1227 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1228 } else { 1229 hci_stack->le_advertisements_enabled_for_current_roles = false; 1230 } 1231 } 1232 #endif 1233 #endif 1234 1235 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1236 1237 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1238 if (!hci_stack->config) return 0; 1239 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1240 // Limit baud rate for Broadcom chipsets to 3 mbps 1241 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1242 baud_rate = 3000000; 1243 } 1244 return baud_rate; 1245 } 1246 1247 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1248 UNUSED(ds); 1249 1250 switch (hci_stack->substate){ 1251 case HCI_INIT_W4_SEND_RESET: 1252 log_info("Resend HCI Reset"); 1253 hci_stack->substate = HCI_INIT_SEND_RESET; 1254 hci_stack->num_cmd_packets = 1; 1255 hci_run(); 1256 break; 1257 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1258 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1259 if (hci_stack->hci_transport->reset_link){ 1260 hci_stack->hci_transport->reset_link(); 1261 } 1262 1263 /* fall through */ 1264 1265 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1266 log_info("Resend HCI Reset - CSR Warm Boot"); 1267 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1268 hci_stack->num_cmd_packets = 1; 1269 hci_run(); 1270 break; 1271 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1272 if (hci_stack->hci_transport->set_baudrate){ 1273 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1274 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1275 hci_stack->hci_transport->set_baudrate(baud_rate); 1276 } 1277 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1278 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1279 if (hci_stack->hci_transport->reset_link){ 1280 log_info("Link Reset"); 1281 hci_stack->hci_transport->reset_link(); 1282 } 1283 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1284 hci_run(); 1285 } 1286 break; 1287 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1288 // otherwise continue 1289 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1290 hci_send_cmd(&hci_read_local_supported_commands); 1291 break; 1292 default: 1293 break; 1294 } 1295 } 1296 #endif 1297 1298 static void hci_initializing_next_state(void){ 1299 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1300 } 1301 1302 // assumption: hci_can_send_command_packet_now() == true 1303 static void hci_initializing_run(void){ 1304 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1305 switch (hci_stack->substate){ 1306 case HCI_INIT_SEND_RESET: 1307 hci_state_reset(); 1308 1309 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1310 // prepare reset if command complete not received in 100ms 1311 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1312 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1313 btstack_run_loop_add_timer(&hci_stack->timeout); 1314 #endif 1315 // send command 1316 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1317 hci_send_cmd(&hci_reset); 1318 break; 1319 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1320 hci_send_cmd(&hci_read_local_version_information); 1321 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1322 break; 1323 case HCI_INIT_SEND_READ_LOCAL_NAME: 1324 hci_send_cmd(&hci_read_local_name); 1325 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1326 break; 1327 1328 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1329 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1330 hci_state_reset(); 1331 // prepare reset if command complete not received in 100ms 1332 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1333 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1334 btstack_run_loop_add_timer(&hci_stack->timeout); 1335 // send command 1336 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1337 hci_send_cmd(&hci_reset); 1338 break; 1339 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1340 hci_state_reset(); 1341 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1342 hci_send_cmd(&hci_reset); 1343 break; 1344 case HCI_INIT_SEND_BAUD_CHANGE: { 1345 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1346 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1347 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1348 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1349 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1350 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1351 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1352 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1353 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1354 btstack_run_loop_add_timer(&hci_stack->timeout); 1355 } 1356 break; 1357 } 1358 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1359 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1360 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1361 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1362 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1363 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1364 break; 1365 } 1366 case HCI_INIT_CUSTOM_INIT: 1367 // Custom initialization 1368 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1369 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1370 bool send_cmd = false; 1371 switch (hci_stack->chipset_result){ 1372 case BTSTACK_CHIPSET_VALID_COMMAND: 1373 send_cmd = true; 1374 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1375 break; 1376 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1377 send_cmd = true; 1378 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1379 log_info("CSR Warm Boot"); 1380 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1381 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1382 btstack_run_loop_add_timer(&hci_stack->timeout); 1383 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1384 && hci_stack->config 1385 && hci_stack->chipset 1386 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1387 && hci_stack->hci_transport->set_baudrate 1388 && hci_transport_uart_get_main_baud_rate()){ 1389 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1390 } else { 1391 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1392 } 1393 break; 1394 default: 1395 break; 1396 } 1397 1398 if (send_cmd){ 1399 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1400 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1401 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1402 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1403 break; 1404 } 1405 log_info("Init script done"); 1406 1407 // Init script download on Broadcom chipsets causes: 1408 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1409 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1410 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1411 1412 // - baud rate to reset, restore UART baud rate if needed 1413 int need_baud_change = hci_stack->config 1414 && hci_stack->chipset 1415 && hci_stack->chipset->set_baudrate_command 1416 && hci_stack->hci_transport->set_baudrate 1417 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1418 if (need_baud_change) { 1419 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1420 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1421 hci_stack->hci_transport->set_baudrate(baud_rate); 1422 } 1423 1424 uint16_t bcm_delay_ms = 300; 1425 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1426 // -> Work around: wait here. 1427 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1428 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1429 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1430 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1431 btstack_run_loop_add_timer(&hci_stack->timeout); 1432 break; 1433 } 1434 } 1435 // otherwise continue 1436 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1437 hci_send_cmd(&hci_read_local_supported_commands); 1438 break; 1439 case HCI_INIT_SET_BD_ADDR: 1440 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1441 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1442 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1443 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1444 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1445 break; 1446 #endif 1447 1448 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1449 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1450 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1451 hci_send_cmd(&hci_read_local_supported_commands); 1452 break; 1453 case HCI_INIT_READ_BD_ADDR: 1454 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1455 hci_send_cmd(&hci_read_bd_addr); 1456 break; 1457 case HCI_INIT_READ_BUFFER_SIZE: 1458 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1459 hci_send_cmd(&hci_read_buffer_size); 1460 break; 1461 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1462 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1463 hci_send_cmd(&hci_read_local_supported_features); 1464 break; 1465 1466 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1467 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1468 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1469 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1470 break; 1471 case HCI_INIT_HOST_BUFFER_SIZE: 1472 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1473 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1474 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1475 break; 1476 #endif 1477 1478 case HCI_INIT_SET_EVENT_MASK: 1479 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1480 if (hci_le_supported()){ 1481 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1482 } else { 1483 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1484 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1485 } 1486 break; 1487 1488 #ifdef ENABLE_CLASSIC 1489 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1490 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1491 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1492 break; 1493 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1494 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1495 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1496 break; 1497 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1498 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1499 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1500 break; 1501 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1502 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1503 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1504 break; 1505 case HCI_INIT_WRITE_LOCAL_NAME: { 1506 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1507 hci_reserve_packet_buffer(); 1508 uint8_t * packet = hci_stack->hci_packet_buffer; 1509 // construct HCI Command and send 1510 uint16_t opcode = hci_write_local_name.opcode; 1511 hci_stack->last_cmd_opcode = opcode; 1512 packet[0] = opcode & 0xff; 1513 packet[1] = opcode >> 8; 1514 packet[2] = DEVICE_NAME_LEN; 1515 memset(&packet[3], 0, DEVICE_NAME_LEN); 1516 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1517 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1518 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1519 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1520 // expand '00:00:00:00:00:00' in name with bd_addr 1521 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1522 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1523 break; 1524 } 1525 case HCI_INIT_WRITE_EIR_DATA: { 1526 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1527 hci_reserve_packet_buffer(); 1528 uint8_t * packet = hci_stack->hci_packet_buffer; 1529 // construct HCI Command in-place and send 1530 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1531 hci_stack->last_cmd_opcode = opcode; 1532 uint16_t offset = 0; 1533 packet[offset++] = opcode & 0xff; 1534 packet[offset++] = opcode >> 8; 1535 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1536 packet[offset++] = 0; // FEC not required 1537 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1538 if (hci_stack->eir_data){ 1539 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1540 ad_context_t context; 1541 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1542 uint8_t data_type = ad_iterator_get_data_type(&context); 1543 uint8_t size = ad_iterator_get_data_len(&context); 1544 const uint8_t *data = ad_iterator_get_data(&context); 1545 // copy item 1546 packet[offset++] = size + 1; 1547 packet[offset++] = data_type; 1548 memcpy(&packet[offset], data, size); 1549 // update name item 1550 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1551 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1552 } 1553 offset += size; 1554 } 1555 } else { 1556 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1557 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1558 packet[offset++] = bytes_to_copy + 1; 1559 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1560 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1561 // expand '00:00:00:00:00:00' in name with bd_addr 1562 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1563 } 1564 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1565 break; 1566 } 1567 case HCI_INIT_WRITE_INQUIRY_MODE: 1568 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1569 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1570 break; 1571 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1572 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1573 hci_stack->secure_connections_active = true; 1574 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1575 break; 1576 case HCI_INIT_WRITE_SCAN_ENABLE: 1577 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1578 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1579 break; 1580 // only sent if ENABLE_SCO_OVER_HCI is defined 1581 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1582 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1583 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1584 break; 1585 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1586 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1587 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1588 break; 1589 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1590 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1591 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1592 #ifdef ENABLE_SCO_OVER_HCI 1593 log_info("BCM: Route SCO data via HCI transport"); 1594 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1595 #endif 1596 #ifdef ENABLE_SCO_OVER_PCM 1597 log_info("BCM: Route SCO data via PCM interface"); 1598 #ifdef ENABLE_BCM_PCM_WBS 1599 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1600 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1601 #else 1602 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1603 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1604 #endif 1605 #endif 1606 break; 1607 #ifdef ENABLE_SCO_OVER_PCM 1608 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1609 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1610 log_info("BCM: Config PCM interface for I2S"); 1611 #ifdef ENABLE_BCM_PCM_WBS 1612 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1613 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1614 #else 1615 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1616 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1617 #endif 1618 break; 1619 #endif 1620 #endif 1621 1622 #ifdef ENABLE_BLE 1623 // LE INIT 1624 case HCI_INIT_LE_READ_BUFFER_SIZE: 1625 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1626 hci_send_cmd(&hci_le_read_buffer_size); 1627 break; 1628 case HCI_INIT_LE_SET_EVENT_MASK: 1629 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1630 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1631 break; 1632 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1633 // LE Supported Host = 1, Simultaneous Host = 0 1634 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1635 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1636 break; 1637 #endif 1638 1639 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1640 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1641 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1642 hci_send_cmd(&hci_le_read_maximum_data_length); 1643 break; 1644 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1645 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1646 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1647 break; 1648 #endif 1649 1650 #ifdef ENABLE_LE_CENTRAL 1651 case HCI_INIT_READ_WHITE_LIST_SIZE: 1652 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1653 hci_send_cmd(&hci_le_read_white_list_size); 1654 break; 1655 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1656 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1657 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); 1658 break; 1659 #endif 1660 default: 1661 return; 1662 } 1663 } 1664 1665 static void hci_init_done(void){ 1666 // done. tell the app 1667 log_info("hci_init_done -> HCI_STATE_WORKING"); 1668 hci_stack->state = HCI_STATE_WORKING; 1669 hci_emit_state(); 1670 hci_run(); 1671 } 1672 1673 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1674 bool command_completed = false; 1675 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1676 uint16_t opcode = little_endian_read_16(packet,3); 1677 if (opcode == hci_stack->last_cmd_opcode){ 1678 command_completed = true; 1679 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1680 } else { 1681 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1682 } 1683 } 1684 1685 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1686 uint8_t status = packet[2]; 1687 uint16_t opcode = little_endian_read_16(packet,4); 1688 if (opcode == hci_stack->last_cmd_opcode){ 1689 if (status){ 1690 command_completed = true; 1691 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1692 } else { 1693 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1694 } 1695 } else { 1696 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1697 } 1698 } 1699 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1700 // Vendor == CSR 1701 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1702 // TODO: track actual command 1703 command_completed = true; 1704 } 1705 1706 // Vendor == Toshiba 1707 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1708 // TODO: track actual command 1709 command_completed = true; 1710 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1711 hci_stack->num_cmd_packets = 1; 1712 } 1713 #endif 1714 1715 return command_completed; 1716 } 1717 1718 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1719 1720 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1721 1722 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1723 1724 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1725 1726 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1727 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1728 // 1729 // HCI Reset 1730 // Timeout 100 ms 1731 // HCI Reset 1732 // Command Complete Reset 1733 // HCI Read Local Version Information 1734 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1735 // hang... 1736 // 1737 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1738 if (!command_completed 1739 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1740 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1741 1742 uint16_t opcode = little_endian_read_16(packet,3); 1743 if (opcode == hci_reset.opcode){ 1744 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1745 return; 1746 } 1747 } 1748 1749 // CSR & H5 1750 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1751 if (!command_completed 1752 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1753 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1754 1755 uint16_t opcode = little_endian_read_16(packet,3); 1756 if (opcode == hci_reset.opcode){ 1757 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1758 return; 1759 } 1760 } 1761 1762 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1763 // fix: Correct substate and behave as command below 1764 if (command_completed){ 1765 switch (hci_stack->substate){ 1766 case HCI_INIT_SEND_RESET: 1767 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1768 break; 1769 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1770 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1771 break; 1772 default: 1773 break; 1774 } 1775 } 1776 1777 #endif 1778 1779 if (!command_completed) return; 1780 1781 bool need_baud_change = false; 1782 bool need_addr_change = false; 1783 1784 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1785 need_baud_change = hci_stack->config 1786 && hci_stack->chipset 1787 && hci_stack->chipset->set_baudrate_command 1788 && hci_stack->hci_transport->set_baudrate 1789 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1790 1791 need_addr_change = hci_stack->custom_bd_addr_set 1792 && hci_stack->chipset 1793 && hci_stack->chipset->set_bd_addr_command; 1794 #endif 1795 1796 switch(hci_stack->substate){ 1797 1798 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1799 case HCI_INIT_SEND_RESET: 1800 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1801 // fix: just correct substate and behave as command below 1802 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1803 btstack_run_loop_remove_timer(&hci_stack->timeout); 1804 break; 1805 case HCI_INIT_W4_SEND_RESET: 1806 btstack_run_loop_remove_timer(&hci_stack->timeout); 1807 break; 1808 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1809 log_info("Received local name, need baud change %d", (int) need_baud_change); 1810 if (need_baud_change){ 1811 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1812 return; 1813 } 1814 // skip baud change 1815 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1816 return; 1817 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1818 // for STLC2500D, baud rate change already happened. 1819 // for others, baud rate gets changed now 1820 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1821 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1822 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1823 hci_stack->hci_transport->set_baudrate(baud_rate); 1824 } 1825 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1826 return; 1827 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1828 btstack_run_loop_remove_timer(&hci_stack->timeout); 1829 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1830 return; 1831 case HCI_INIT_W4_CUSTOM_INIT: 1832 // repeat custom init 1833 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1834 return; 1835 #else 1836 case HCI_INIT_W4_SEND_RESET: 1837 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1838 return ; 1839 #endif 1840 1841 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1842 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1843 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1844 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1845 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1846 return; 1847 } 1848 if (need_addr_change){ 1849 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1850 return; 1851 } 1852 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1853 return; 1854 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1855 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1856 if (need_baud_change){ 1857 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1858 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1859 hci_stack->hci_transport->set_baudrate(baud_rate); 1860 } 1861 if (need_addr_change){ 1862 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1863 return; 1864 } 1865 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1866 return; 1867 case HCI_INIT_W4_SET_BD_ADDR: 1868 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1869 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1870 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1871 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1872 return; 1873 } 1874 // skipping st warm boot 1875 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1876 return; 1877 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1878 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1879 return; 1880 #endif 1881 case HCI_INIT_W4_READ_BD_ADDR: 1882 // only read buffer size if supported 1883 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1884 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1885 return; 1886 } 1887 // skipping read buffer size 1888 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1889 return; 1890 case HCI_INIT_W4_SET_EVENT_MASK: 1891 // skip Classic init commands for LE only chipsets 1892 if (!hci_classic_supported()){ 1893 #ifdef ENABLE_BLE 1894 if (hci_le_supported()){ 1895 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1896 return; 1897 } 1898 #endif 1899 log_error("Neither BR/EDR nor LE supported"); 1900 hci_init_done(); 1901 return; 1902 } 1903 if (!gap_ssp_supported()){ 1904 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1905 return; 1906 } 1907 break; 1908 #ifdef ENABLE_BLE 1909 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1910 // skip write le host if not supported (e.g. on LE only EM9301) 1911 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1912 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1913 return; 1914 1915 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1916 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1917 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1918 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1919 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1920 return; 1921 } 1922 // explicit fall through to reduce repetitions 1923 1924 #ifdef ENABLE_LE_CENTRAL 1925 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1926 #else 1927 hci_init_done(); 1928 #endif 1929 return; 1930 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1931 1932 #endif /* ENABLE_BLE */ 1933 1934 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1935 // skip write secure connections host support if not supported or disabled 1936 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1937 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1938 return; 1939 } 1940 break; 1941 1942 #ifdef ENABLE_SCO_OVER_HCI 1943 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1944 // skip write synchronous flow control if not supported 1945 if (hci_stack->local_supported_commands[0] & 0x04) break; 1946 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1947 1948 /* fall through */ 1949 1950 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1951 // skip write default erroneous data reporting if not supported 1952 if (hci_stack->local_supported_commands[0] & 0x08) break; 1953 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1954 1955 /* fall through */ 1956 1957 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1958 // skip bcm set sco pcm config on non-Broadcom chipsets 1959 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1960 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1961 1962 /* fall through */ 1963 1964 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1965 if (!hci_le_supported()){ 1966 // SKIP LE init for Classic only configuration 1967 hci_init_done(); 1968 return; 1969 } 1970 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1971 break; 1972 1973 #else /* !ENABLE_SCO_OVER_HCI */ 1974 1975 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1976 #ifdef ENABLE_SCO_OVER_PCM 1977 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1978 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1979 return; 1980 } 1981 #endif 1982 /* fall through */ 1983 1984 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1985 #ifdef ENABLE_BLE 1986 if (hci_le_supported()){ 1987 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1988 return; 1989 } 1990 #endif 1991 // SKIP LE init for Classic only configuration 1992 hci_init_done(); 1993 return; 1994 #endif /* ENABLE_SCO_OVER_HCI */ 1995 1996 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1997 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1998 // Response to command before init done state -> init done 1999 case (HCI_INIT_DONE-1): 2000 hci_init_done(); 2001 return; 2002 #endif 2003 2004 default: 2005 break; 2006 } 2007 hci_initializing_next_state(); 2008 } 2009 2010 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2011 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2012 bd_addr_t bd_address; 2013 (void)memcpy(&bd_address, conn->address, 6); 2014 2015 #ifdef ENABLE_CLASSIC 2016 // cache needed data 2017 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2018 #endif 2019 2020 // connection failed, remove entry 2021 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2022 btstack_memory_hci_connection_free( conn ); 2023 2024 #ifdef ENABLE_CLASSIC 2025 // notify client if dedicated bonding 2026 if (notify_dedicated_bonding_failed){ 2027 log_info("hci notify_dedicated_bonding_failed"); 2028 hci_emit_dedicated_bonding_result(bd_address, status); 2029 } 2030 2031 // if authentication error, also delete link key 2032 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2033 gap_drop_link_key_for_bd_addr(bd_address); 2034 } 2035 #else 2036 UNUSED(status); 2037 #endif 2038 } 2039 2040 #ifdef ENABLE_CLASSIC 2041 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2042 // SSP Controller 2043 if (features[6] & (1 << 3)){ 2044 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2045 } 2046 // eSCO 2047 if (features[3] & (1<<7)){ 2048 conn->remote_supported_features[0] |= 1; 2049 } 2050 // Extended features 2051 if (features[7] & (1<<7)){ 2052 conn->remote_supported_features[0] |= 2; 2053 } 2054 } 2055 2056 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2057 // SSP Host 2058 if (features[0] & (1 << 0)){ 2059 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2060 } 2061 // SC Host 2062 if (features[0] & (1 << 3)){ 2063 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2064 } 2065 } 2066 2067 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2068 // SC Controller 2069 if (features[1] & (1 << 0)){ 2070 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2071 } 2072 } 2073 2074 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2075 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2076 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2077 if (conn->bonding_flags & BONDING_DEDICATED){ 2078 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2079 } 2080 } 2081 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2082 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2083 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2084 } 2085 2086 #endif 2087 2088 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2089 // handle BT initialization 2090 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2091 hci_initializing_event_handler(packet, size); 2092 } 2093 2094 // help with BT sleep 2095 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2096 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2097 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2098 hci_initializing_next_state(); 2099 } 2100 } 2101 2102 #ifdef ENABLE_CLASSIC 2103 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2104 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2105 conn->encryption_key_size = encryption_key_size; 2106 2107 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2108 conn->requested_security_level = LEVEL_0; 2109 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2110 return; 2111 } 2112 2113 // Request Authentication if not already done 2114 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2115 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2116 } 2117 #endif 2118 2119 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2120 UNUSED(size); 2121 2122 uint16_t manufacturer; 2123 #ifdef ENABLE_CLASSIC 2124 hci_con_handle_t handle; 2125 hci_connection_t * conn; 2126 uint8_t status; 2127 #endif 2128 // get num cmd packets - limit to 1 to reduce complexity 2129 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2130 2131 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2132 switch (opcode){ 2133 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2134 if (packet[5]) break; 2135 // terminate, name 248 chars 2136 packet[6+248] = 0; 2137 log_info("local name: %s", &packet[6]); 2138 break; 2139 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2140 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2141 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2142 uint16_t acl_len = little_endian_read_16(packet, 6); 2143 uint16_t sco_len = packet[8]; 2144 2145 // determine usable ACL/SCO payload size 2146 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2147 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2148 2149 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2150 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2151 2152 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2153 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2154 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2155 } 2156 break; 2157 case HCI_OPCODE_HCI_READ_RSSI: 2158 if (packet[5] == ERROR_CODE_SUCCESS){ 2159 uint8_t event[5]; 2160 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2161 event[1] = 3; 2162 (void)memcpy(&event[2], &packet[6], 3); 2163 hci_emit_event(event, sizeof(event), 1); 2164 } 2165 break; 2166 #ifdef ENABLE_BLE 2167 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2168 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2169 hci_stack->le_acl_packets_total_num = packet[8]; 2170 // determine usable ACL payload size 2171 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2172 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2173 } 2174 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2175 break; 2176 #endif 2177 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2178 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2179 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2180 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2181 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); 2182 break; 2183 #endif 2184 #ifdef ENABLE_LE_CENTRAL 2185 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2186 hci_stack->le_whitelist_capacity = packet[6]; 2187 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2188 break; 2189 #endif 2190 case HCI_OPCODE_HCI_READ_BD_ADDR: 2191 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2192 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)); 2193 #ifdef ENABLE_CLASSIC 2194 if (hci_stack->link_key_db){ 2195 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2196 } 2197 #endif 2198 break; 2199 #ifdef ENABLE_CLASSIC 2200 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2201 hci_emit_discoverable_enabled(hci_stack->discoverable); 2202 break; 2203 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2204 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2205 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2206 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2207 hci_emit_event(event, sizeof(event), 1); 2208 } 2209 break; 2210 #endif 2211 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2212 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2213 2214 #ifdef ENABLE_CLASSIC 2215 // determine usable ACL packet types based on host buffer size and supported features 2216 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2217 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2218 #endif 2219 // Classic/LE 2220 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2221 break; 2222 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2223 manufacturer = little_endian_read_16(packet, 10); 2224 // map Cypress to Broadcom 2225 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2226 log_info("Treat Cypress as Broadcom"); 2227 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2228 little_endian_store_16(packet, 10, manufacturer); 2229 } 2230 hci_stack->manufacturer = manufacturer; 2231 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2232 break; 2233 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2234 hci_stack->local_supported_commands[0] = 2235 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2243 hci_stack->local_supported_commands[1] = 2244 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2249 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2250 break; 2251 #ifdef ENABLE_CLASSIC 2252 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2253 if (packet[5]) return; 2254 hci_stack->synchronous_flow_control_enabled = 1; 2255 break; 2256 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2257 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2258 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2259 conn = hci_connection_for_handle(handle); 2260 if (conn != NULL) { 2261 uint8_t key_size = 0; 2262 if (status == 0){ 2263 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2264 log_info("Handle %04x key Size: %u", handle, key_size); 2265 } else { 2266 key_size = 1; 2267 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2268 } 2269 hci_handle_read_encryption_key_size_complete(conn, key_size); 2270 } 2271 break; 2272 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2273 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2274 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2275 uint8_t event[67]; 2276 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2277 event[1] = 65; 2278 (void)memset(&event[2], 0, 65); 2279 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2280 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2281 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2282 event[2] = 3; 2283 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2284 } else { 2285 event[2] = 1; 2286 } 2287 } 2288 hci_emit_event(event, sizeof(event), 0); 2289 break; 2290 } 2291 #endif 2292 #endif 2293 default: 2294 break; 2295 } 2296 } 2297 2298 #ifdef ENABLE_BLE 2299 static void event_handle_le_connection_complete(const uint8_t * packet){ 2300 bd_addr_t addr; 2301 bd_addr_type_t addr_type; 2302 hci_connection_t * conn; 2303 2304 // Connection management 2305 reverse_bd_addr(&packet[8], addr); 2306 addr_type = (bd_addr_type_t)packet[7]; 2307 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2308 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2309 2310 #ifdef ENABLE_LE_CENTRAL 2311 // handle error: error is reported only to the initiator -> outgoing connection 2312 if (packet[3]){ 2313 2314 // handle cancelled outgoing connection 2315 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2316 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2317 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2318 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2319 // reset state 2320 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2321 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2322 // get outgoing connection conn struct for direct connect 2323 conn = gap_get_outgoing_connection(); 2324 } 2325 2326 // outgoing le connection establishment is done 2327 if (conn){ 2328 // remove entry 2329 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2330 btstack_memory_hci_connection_free( conn ); 2331 } 2332 return; 2333 } 2334 #endif 2335 2336 // on success, both hosts receive connection complete event 2337 if (packet[6] == HCI_ROLE_MASTER){ 2338 #ifdef ENABLE_LE_CENTRAL 2339 // if we're master on an le connection, it was an outgoing connection and we're done with it 2340 // note: no hci_connection_t object exists yet for connect with whitelist 2341 if (hci_is_le_connection_type(addr_type)){ 2342 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2343 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2344 } 2345 #endif 2346 } else { 2347 #ifdef ENABLE_LE_PERIPHERAL 2348 // if we're slave, it was an incoming connection, advertisements have stopped 2349 hci_stack->le_advertisements_active = false; 2350 #endif 2351 } 2352 2353 // LE connections are auto-accepted, so just create a connection if there isn't one already 2354 if (!conn){ 2355 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2356 } 2357 2358 // no memory, sorry. 2359 if (!conn){ 2360 return; 2361 } 2362 2363 conn->state = OPEN; 2364 conn->role = packet[6]; 2365 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2366 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2367 2368 #ifdef ENABLE_LE_PERIPHERAL 2369 if (packet[6] == HCI_ROLE_SLAVE){ 2370 hci_update_advertisements_enabled_for_current_roles(); 2371 } 2372 #endif 2373 2374 // init unenhanced att bearer mtu 2375 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2376 conn->att_connection.mtu_exchanged = false; 2377 2378 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2379 2380 // restart timer 2381 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2382 // btstack_run_loop_add_timer(&conn->timeout); 2383 2384 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2385 2386 hci_emit_nr_connections_changed(); 2387 } 2388 #endif 2389 2390 #ifdef ENABLE_CLASSIC 2391 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){ 2392 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2393 // LEVEL_4 is tested by l2cap 2394 // LEVEL 3 requires MITM protection -> check io capabilities 2395 if (level >= LEVEL_3){ 2396 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2397 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2398 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2399 } 2400 // LEVEL 2 requires SSP, which is a given 2401 return true; 2402 } 2403 2404 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2405 uint16_t i; 2406 for (i=0; i < size ; i++){ 2407 if (data[i] != 0) { 2408 return false; 2409 } 2410 } 2411 return true; 2412 } 2413 2414 #endif 2415 2416 static void event_handler(uint8_t *packet, uint16_t size){ 2417 2418 uint16_t event_length = packet[1]; 2419 2420 // assert packet is complete 2421 if (size != (event_length + 2u)){ 2422 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2423 return; 2424 } 2425 2426 bd_addr_type_t addr_type; 2427 hci_con_handle_t handle; 2428 hci_connection_t * conn; 2429 int i; 2430 int create_connection_cmd; 2431 2432 #ifdef ENABLE_CLASSIC 2433 hci_link_type_t link_type; 2434 bd_addr_t addr; 2435 #endif 2436 2437 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2438 2439 switch (hci_event_packet_get_type(packet)) { 2440 2441 case HCI_EVENT_COMMAND_COMPLETE: 2442 handle_command_complete_event(packet, size); 2443 break; 2444 2445 case HCI_EVENT_COMMAND_STATUS: 2446 // get num cmd packets - limit to 1 to reduce complexity 2447 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2448 2449 // check command status to detected failed outgoing connections 2450 create_connection_cmd = 0; 2451 #ifdef ENABLE_CLASSIC 2452 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2453 create_connection_cmd = 1; 2454 } 2455 #endif 2456 #ifdef ENABLE_LE_CENTRAL 2457 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2458 create_connection_cmd = 1; 2459 } 2460 #endif 2461 if (create_connection_cmd) { 2462 uint8_t status = hci_event_command_status_get_status(packet); 2463 addr_type = hci_stack->outgoing_addr_type; 2464 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2465 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); 2466 2467 // reset outgoing address info 2468 memset(hci_stack->outgoing_addr, 0, 6); 2469 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2470 2471 // on error 2472 if (status != ERROR_CODE_SUCCESS){ 2473 #ifdef ENABLE_LE_CENTRAL 2474 if (hci_is_le_connection_type(addr_type)){ 2475 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2476 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2477 } 2478 #endif 2479 // error => outgoing connection failed 2480 if (conn != NULL){ 2481 hci_handle_connection_failed(conn, status); 2482 } 2483 } 2484 } 2485 2486 #ifdef ENABLE_CLASSIC 2487 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2488 uint8_t status = hci_event_command_status_get_status(packet); 2489 log_info("command status (inquiry), status %x", status); 2490 if (status == ERROR_CODE_SUCCESS) { 2491 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2492 } else { 2493 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2494 } 2495 } 2496 #endif 2497 break; 2498 2499 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2500 if (size < 3) return; 2501 uint16_t num_handles = packet[2]; 2502 if (size != (3u + num_handles * 4u)) return; 2503 uint16_t offset = 3; 2504 for (i=0; i<num_handles;i++){ 2505 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2506 offset += 2u; 2507 uint16_t num_packets = little_endian_read_16(packet, offset); 2508 offset += 2u; 2509 2510 conn = hci_connection_for_handle(handle); 2511 if (!conn){ 2512 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2513 continue; 2514 } 2515 2516 if (conn->num_packets_sent >= num_packets){ 2517 conn->num_packets_sent -= num_packets; 2518 } else { 2519 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2520 conn->num_packets_sent = 0; 2521 } 2522 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2523 2524 #ifdef ENABLE_CLASSIC 2525 // For SCO, we do the can_send_now_check here 2526 hci_notify_if_sco_can_send_now(); 2527 #endif 2528 } 2529 break; 2530 } 2531 2532 #ifdef ENABLE_CLASSIC 2533 case HCI_EVENT_INQUIRY_COMPLETE: 2534 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2535 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2536 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2537 hci_emit_event(event, sizeof(event), 1); 2538 } 2539 break; 2540 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2541 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2542 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2543 } 2544 break; 2545 case HCI_EVENT_CONNECTION_REQUEST: 2546 reverse_bd_addr(&packet[2], addr); 2547 link_type = (hci_link_type_t) packet[11]; 2548 2549 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2550 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2551 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2552 bd_addr_copy(hci_stack->decline_addr, addr); 2553 break; 2554 } 2555 2556 if (hci_stack->gap_classic_accept_callback != NULL){ 2557 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2558 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2559 bd_addr_copy(hci_stack->decline_addr, addr); 2560 break; 2561 } 2562 } 2563 2564 // TODO: eval COD 8-10 2565 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2566 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2567 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2568 if (!conn) { 2569 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2570 } 2571 if (!conn) { 2572 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2573 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2574 bd_addr_copy(hci_stack->decline_addr, addr); 2575 break; 2576 } 2577 conn->role = HCI_ROLE_SLAVE; 2578 conn->state = RECEIVED_CONNECTION_REQUEST; 2579 // store info about eSCO 2580 if (link_type == HCI_LINK_TYPE_ESCO){ 2581 conn->remote_supported_features[0] |= 1; 2582 } 2583 hci_run(); 2584 break; 2585 2586 case HCI_EVENT_CONNECTION_COMPLETE: 2587 // Connection management 2588 reverse_bd_addr(&packet[5], addr); 2589 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2590 addr_type = BD_ADDR_TYPE_ACL; 2591 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2592 if (conn) { 2593 if (!packet[2]){ 2594 conn->state = OPEN; 2595 conn->con_handle = little_endian_read_16(packet, 3); 2596 2597 // queue get remote feature 2598 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2599 2600 // queue set supervision timeout if we're master 2601 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2602 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2603 } 2604 2605 // restart timer 2606 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2607 btstack_run_loop_add_timer(&conn->timeout); 2608 2609 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2610 2611 hci_emit_nr_connections_changed(); 2612 } else { 2613 // connection failed 2614 hci_handle_connection_failed(conn, packet[2]); 2615 } 2616 } 2617 break; 2618 2619 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2620 reverse_bd_addr(&packet[5], addr); 2621 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2622 if (packet[2]){ 2623 // connection failed 2624 break; 2625 } 2626 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2627 if (!conn) { 2628 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2629 } 2630 if (!conn) { 2631 break; 2632 } 2633 conn->state = OPEN; 2634 conn->con_handle = little_endian_read_16(packet, 3); 2635 2636 #ifdef ENABLE_SCO_OVER_HCI 2637 // update SCO 2638 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2639 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2640 } 2641 // trigger can send now 2642 if (hci_have_usb_transport()){ 2643 hci_stack->sco_can_send_now = 1; 2644 } 2645 #endif 2646 #ifdef HAVE_SCO_TRANSPORT 2647 // configure sco transport 2648 if (hci_stack->sco_transport != NULL){ 2649 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2650 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2651 } 2652 #endif 2653 break; 2654 2655 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2656 handle = little_endian_read_16(packet, 3); 2657 conn = hci_connection_for_handle(handle); 2658 if (!conn) break; 2659 if (!packet[2]){ 2660 const uint8_t * features = &packet[5]; 2661 hci_handle_remote_features_page_0(conn, features); 2662 2663 // read extended features if possible 2664 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2665 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2666 break; 2667 } 2668 } 2669 hci_handle_remote_features_received(conn); 2670 break; 2671 2672 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2673 handle = little_endian_read_16(packet, 3); 2674 conn = hci_connection_for_handle(handle); 2675 if (!conn) break; 2676 // status = ok, page = 1 2677 if (!packet[2]) { 2678 uint8_t page_number = packet[5]; 2679 uint8_t maximum_page_number = packet[6]; 2680 const uint8_t * features = &packet[7]; 2681 bool done = false; 2682 switch (page_number){ 2683 case 1: 2684 hci_handle_remote_features_page_1(conn, features); 2685 if (maximum_page_number >= 2){ 2686 // get Secure Connections (Controller) from Page 2 if available 2687 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2688 } else { 2689 // otherwise, assume SC (Controller) == SC (Host) 2690 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2691 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2692 } 2693 done = true; 2694 } 2695 break; 2696 case 2: 2697 hci_handle_remote_features_page_2(conn, features); 2698 done = true; 2699 break; 2700 default: 2701 break; 2702 } 2703 if (!done) break; 2704 } 2705 hci_handle_remote_features_received(conn); 2706 break; 2707 2708 case HCI_EVENT_LINK_KEY_REQUEST: 2709 // request handled by hci_run() 2710 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2711 break; 2712 2713 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2714 hci_event_link_key_request_get_bd_addr(packet, addr); 2715 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2716 if (!conn) break; 2717 2718 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2719 2720 // CVE-2020-26555: ignore NULL link key 2721 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2722 if (btstack_is_null(&packet[8], 16)) break; 2723 2724 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2725 // Change Connection Encryption keeps link key type 2726 if (link_key_type != CHANGED_COMBINATION_KEY){ 2727 conn->link_key_type = link_key_type; 2728 } 2729 2730 // cache link key. link keys stored in little-endian format for legacy reasons 2731 memcpy(&conn->link_key, &packet[8], 16); 2732 2733 // only store link key: 2734 // - if bondable enabled 2735 if (hci_stack->bondable == false) break; 2736 // - if security level sufficient 2737 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2738 // - for SSP, also check if remote side requested bonding as well 2739 if (conn->link_key_type != COMBINATION_KEY){ 2740 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2741 if (!remote_bonding){ 2742 break; 2743 } 2744 } 2745 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2746 break; 2747 } 2748 2749 case HCI_EVENT_PIN_CODE_REQUEST: 2750 hci_event_pin_code_request_get_bd_addr(packet, addr); 2751 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2752 if (!conn) break; 2753 2754 hci_pairing_started(conn, false); 2755 // abort pairing if: non-bondable mode (event is not forwarded to app) 2756 if (!hci_stack->bondable ){ 2757 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2758 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2759 hci_run(); 2760 return; 2761 } 2762 // abort pairing if: Secure Connections Only mode (event is not forwarded to app) 2763 if (hci_stack->gap_secure_connections_only_mode){ 2764 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2765 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2766 hci_run(); 2767 return; 2768 } 2769 break; 2770 2771 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2772 hci_event_io_capability_response_get_bd_addr(packet, addr); 2773 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2774 if (!conn) break; 2775 2776 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2777 hci_pairing_started(conn, true); 2778 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2779 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2780 break; 2781 2782 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2783 hci_event_io_capability_response_get_bd_addr(packet, addr); 2784 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2785 if (!conn) break; 2786 2787 hci_connection_timestamp(conn); 2788 2789 hci_pairing_started(conn, true); 2790 2791 // assess security 2792 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2793 log_info("Level 4 required, but SC not supported -> abort"); 2794 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2795 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2796 break; 2797 } 2798 2799 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2800 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2801 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2802 } else { 2803 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2804 } 2805 #endif 2806 break; 2807 2808 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2809 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2810 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2811 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2812 break; 2813 #endif 2814 2815 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2816 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2817 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2818 if (!conn) break; 2819 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2820 if (hci_stack->ssp_auto_accept){ 2821 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2822 }; 2823 } else { 2824 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2825 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2826 // don't forward event to app 2827 hci_run(); 2828 return; 2829 } 2830 break; 2831 2832 case HCI_EVENT_USER_PASSKEY_REQUEST: 2833 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2834 if (hci_stack->ssp_auto_accept){ 2835 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2836 }; 2837 break; 2838 2839 case HCI_EVENT_MODE_CHANGE: 2840 handle = hci_event_mode_change_get_handle(packet); 2841 conn = hci_connection_for_handle(handle); 2842 if (!conn) break; 2843 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2844 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2845 break; 2846 #endif 2847 2848 case HCI_EVENT_ENCRYPTION_CHANGE: 2849 handle = hci_event_encryption_change_get_connection_handle(packet); 2850 conn = hci_connection_for_handle(handle); 2851 if (!conn) break; 2852 if (hci_event_encryption_change_get_status(packet) == 0u) { 2853 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2854 if (encryption_enabled){ 2855 if (hci_is_le_connection(conn)){ 2856 // For LE, we accept connection as encrypted 2857 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2858 } 2859 #ifdef ENABLE_CLASSIC 2860 else { 2861 2862 // dedicated bonding: send result and disconnect 2863 if (conn->bonding_flags & BONDING_DEDICATED){ 2864 conn->bonding_flags &= ~BONDING_DEDICATED; 2865 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2866 conn->bonding_status = packet[2]; 2867 break; 2868 } 2869 2870 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2871 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2872 bool connected_uses_aes_ccm = encryption_enabled == 2; 2873 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2874 log_info("SC during pairing, but only E0 now -> abort"); 2875 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2876 break; 2877 } 2878 2879 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2880 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2881 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2882 } else { 2883 // if not, pretend everything is perfect 2884 hci_handle_read_encryption_key_size_complete(conn, 16); 2885 } 2886 } 2887 #endif 2888 } else { 2889 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2890 } 2891 } 2892 2893 break; 2894 2895 #ifdef ENABLE_CLASSIC 2896 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2897 handle = hci_event_authentication_complete_get_connection_handle(packet); 2898 conn = hci_connection_for_handle(handle); 2899 if (!conn) break; 2900 2901 // clear authentication active flag 2902 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2903 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2904 2905 // authenticated only if auth status == 0 2906 if (hci_event_authentication_complete_get_status(packet) == 0){ 2907 // authenticated 2908 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2909 2910 // If not already encrypted, start encryption 2911 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2912 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2913 break; 2914 } 2915 } 2916 2917 // emit updated security level 2918 conn->requested_security_level = LEVEL_0; 2919 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2920 break; 2921 2922 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2923 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2924 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2925 if (!conn) break; 2926 2927 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2928 break; 2929 #endif 2930 2931 // HCI_EVENT_DISCONNECTION_COMPLETE 2932 // has been split, to first notify stack before shutting connection down 2933 // see end of function, too. 2934 case HCI_EVENT_DISCONNECTION_COMPLETE: 2935 if (packet[2]) break; // status != 0 2936 handle = little_endian_read_16(packet, 3); 2937 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2938 if (hci_stack->acl_fragmentation_total_size > 0u) { 2939 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2940 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2941 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2942 hci_stack->acl_fragmentation_total_size = 0; 2943 hci_stack->acl_fragmentation_pos = 0; 2944 if (release_buffer){ 2945 hci_release_packet_buffer(); 2946 } 2947 } 2948 } 2949 2950 conn = hci_connection_for_handle(handle); 2951 if (!conn) break; 2952 #ifdef ENABLE_CLASSIC 2953 // pairing failed if it was ongoing 2954 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2955 #endif 2956 // mark connection for shutdown 2957 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2958 2959 // emit dedicatd bonding event 2960 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2961 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2962 } 2963 2964 #ifdef ENABLE_BLE 2965 #ifdef ENABLE_LE_PERIPHERAL 2966 // re-enable advertisements for le connections if active 2967 if (hci_is_le_connection(conn)){ 2968 hci_update_advertisements_enabled_for_current_roles(); 2969 } 2970 #endif 2971 #endif 2972 break; 2973 2974 case HCI_EVENT_HARDWARE_ERROR: 2975 log_error("Hardware Error: 0x%02x", packet[2]); 2976 if (hci_stack->hardware_error_callback){ 2977 (*hci_stack->hardware_error_callback)(packet[2]); 2978 } else { 2979 // if no special requests, just reboot stack 2980 hci_power_control_off(); 2981 hci_power_control_on(); 2982 } 2983 break; 2984 2985 #ifdef ENABLE_CLASSIC 2986 case HCI_EVENT_ROLE_CHANGE: 2987 if (packet[2]) break; // status != 0 2988 reverse_bd_addr(&packet[3], addr); 2989 addr_type = BD_ADDR_TYPE_ACL; 2990 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2991 if (!conn) break; 2992 conn->role = packet[9]; 2993 break; 2994 #endif 2995 2996 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2997 // release packet buffer only for asynchronous transport and if there are not further fragements 2998 if (hci_transport_synchronous()) { 2999 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3000 return; // instead of break: to avoid re-entering hci_run() 3001 } 3002 hci_stack->acl_fragmentation_tx_active = 0; 3003 if (hci_stack->acl_fragmentation_total_size) break; 3004 hci_release_packet_buffer(); 3005 3006 // L2CAP receives this event via the hci_emit_event below 3007 3008 #ifdef ENABLE_CLASSIC 3009 // For SCO, we do the can_send_now_check here 3010 hci_notify_if_sco_can_send_now(); 3011 #endif 3012 break; 3013 3014 #ifdef ENABLE_CLASSIC 3015 case HCI_EVENT_SCO_CAN_SEND_NOW: 3016 // For SCO, we do the can_send_now_check here 3017 hci_stack->sco_can_send_now = 1; 3018 hci_notify_if_sco_can_send_now(); 3019 return; 3020 3021 // explode inquriy results for easier consumption 3022 case HCI_EVENT_INQUIRY_RESULT: 3023 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3024 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3025 gap_inquiry_explode(packet, size); 3026 break; 3027 #endif 3028 3029 #ifdef ENABLE_BLE 3030 case HCI_EVENT_LE_META: 3031 switch (packet[2]){ 3032 #ifdef ENABLE_LE_CENTRAL 3033 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3034 // log_info("advertising report received"); 3035 if (!hci_stack->le_scanning_enabled) break; 3036 le_handle_advertisement_report(packet, size); 3037 break; 3038 #endif 3039 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3040 event_handle_le_connection_complete(packet); 3041 break; 3042 3043 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3044 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3045 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3046 conn = hci_connection_for_handle(handle); 3047 if (!conn) break; 3048 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3049 break; 3050 3051 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3052 // connection 3053 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3054 conn = hci_connection_for_handle(handle); 3055 if (conn) { 3056 // read arguments 3057 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3058 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3059 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3060 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3061 3062 // validate against current connection parameter range 3063 le_connection_parameter_range_t existing_range; 3064 gap_get_connection_parameter_range(&existing_range); 3065 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3066 if (update_parameter){ 3067 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3068 conn->le_conn_interval_min = le_conn_interval_min; 3069 conn->le_conn_interval_max = le_conn_interval_max; 3070 conn->le_conn_latency = le_conn_latency; 3071 conn->le_supervision_timeout = le_supervision_timeout; 3072 } else { 3073 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3074 } 3075 } 3076 break; 3077 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3078 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3079 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3080 conn = hci_connection_for_handle(handle); 3081 if (conn) { 3082 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3083 } 3084 break; 3085 #endif 3086 default: 3087 break; 3088 } 3089 break; 3090 #endif 3091 case HCI_EVENT_VENDOR_SPECIFIC: 3092 // Vendor specific commands often create vendor specific event instead of num completed packets 3093 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3094 switch (hci_stack->manufacturer){ 3095 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3096 hci_stack->num_cmd_packets = 1; 3097 break; 3098 default: 3099 break; 3100 } 3101 break; 3102 default: 3103 break; 3104 } 3105 3106 handle_event_for_current_stack_state(packet, size); 3107 3108 // notify upper stack 3109 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3110 3111 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3112 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3113 handle = little_endian_read_16(packet, 3); 3114 hci_connection_t * aConn = hci_connection_for_handle(handle); 3115 // discard connection if app did not trigger a reconnect in the event handler 3116 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3117 hci_shutdown_connection(aConn); 3118 } 3119 } 3120 3121 // execute main loop 3122 hci_run(); 3123 } 3124 3125 #ifdef ENABLE_CLASSIC 3126 3127 #ifdef ENABLE_SCO_OVER_HCI 3128 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3129 static void sco_schedule_tx(hci_connection_t * conn); 3130 3131 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3132 log_debug("SCO TX Timeout"); 3133 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3134 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3135 if (!conn) return; 3136 3137 // trigger send 3138 conn->sco_tx_ready = 1; 3139 // extra packet if CVSD but SCO buffer is too short 3140 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3141 conn->sco_tx_ready++; 3142 } 3143 hci_notify_if_sco_can_send_now(); 3144 } 3145 3146 3147 #define SCO_TX_AFTER_RX_MS (6) 3148 3149 static void sco_schedule_tx(hci_connection_t * conn){ 3150 3151 uint32_t now = btstack_run_loop_get_time_ms(); 3152 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3153 int time_delta_ms = sco_tx_ms - now; 3154 3155 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3156 3157 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3158 btstack_run_loop_set_timer(timer, time_delta_ms); 3159 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3160 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3161 btstack_run_loop_add_timer(timer); 3162 } 3163 #endif 3164 3165 static void sco_handler(uint8_t * packet, uint16_t size){ 3166 // lookup connection struct 3167 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3168 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3169 if (!conn) return; 3170 3171 #ifdef ENABLE_SCO_OVER_HCI 3172 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3173 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3174 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3175 packet[2] = 0x3c; 3176 memmove(&packet[3], &packet[23], 63); 3177 size = 63; 3178 } 3179 } 3180 3181 if (hci_have_usb_transport()){ 3182 // Nothing to do 3183 } else { 3184 // 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); 3185 if (hci_stack->synchronous_flow_control_enabled == 0){ 3186 uint32_t now = btstack_run_loop_get_time_ms(); 3187 3188 if (!conn->sco_rx_valid){ 3189 // ignore first 10 packets 3190 conn->sco_rx_count++; 3191 // log_debug("sco rx count %u", conn->sco_rx_count); 3192 if (conn->sco_rx_count == 10) { 3193 // use first timestamp as is and pretent it just started 3194 conn->sco_rx_ms = now; 3195 conn->sco_rx_valid = 1; 3196 conn->sco_rx_count = 0; 3197 sco_schedule_tx(conn); 3198 } 3199 } else { 3200 // track expected arrival timme 3201 conn->sco_rx_count++; 3202 conn->sco_rx_ms += 7; 3203 int delta = (int32_t) (now - conn->sco_rx_ms); 3204 if (delta > 0){ 3205 conn->sco_rx_ms++; 3206 } 3207 // log_debug("sco rx %u", conn->sco_rx_ms); 3208 sco_schedule_tx(conn); 3209 } 3210 } 3211 } 3212 #endif 3213 3214 // deliver to app 3215 if (hci_stack->sco_packet_handler) { 3216 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3217 } 3218 3219 #ifdef HAVE_SCO_TRANSPORT 3220 // We can send one packet for each received packet 3221 conn->sco_tx_ready++; 3222 hci_notify_if_sco_can_send_now(); 3223 #endif 3224 3225 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3226 conn->num_packets_completed++; 3227 hci_stack->host_completed_packets = 1; 3228 hci_run(); 3229 #endif 3230 } 3231 #endif 3232 3233 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3234 hci_dump_packet(packet_type, 1, packet, size); 3235 switch (packet_type) { 3236 case HCI_EVENT_PACKET: 3237 event_handler(packet, size); 3238 break; 3239 case HCI_ACL_DATA_PACKET: 3240 acl_handler(packet, size); 3241 break; 3242 #ifdef ENABLE_CLASSIC 3243 case HCI_SCO_DATA_PACKET: 3244 sco_handler(packet, size); 3245 break; 3246 #endif 3247 default: 3248 break; 3249 } 3250 } 3251 3252 /** 3253 * @brief Add event packet handler. 3254 */ 3255 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3256 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3257 } 3258 3259 3260 /** Register HCI packet handlers */ 3261 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3262 hci_stack->acl_packet_handler = handler; 3263 } 3264 3265 #ifdef ENABLE_CLASSIC 3266 /** 3267 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3268 */ 3269 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3270 hci_stack->sco_packet_handler = handler; 3271 } 3272 #endif 3273 3274 static void hci_state_reset(void){ 3275 // no connections yet 3276 hci_stack->connections = NULL; 3277 3278 // keep discoverable/connectable as this has been requested by the client(s) 3279 // hci_stack->discoverable = 0; 3280 // hci_stack->connectable = 0; 3281 // hci_stack->bondable = 1; 3282 // hci_stack->own_addr_type = 0; 3283 3284 // buffer is free 3285 hci_stack->hci_packet_buffer_reserved = 0; 3286 3287 // no pending cmds 3288 hci_stack->decline_reason = 0; 3289 hci_stack->new_scan_enable_value = 0xff; 3290 3291 hci_stack->secure_connections_active = false; 3292 3293 #ifdef ENABLE_CLASSIC 3294 hci_stack->new_page_scan_interval = 0xffff; 3295 hci_stack->new_page_scan_window = 0xffff; 3296 hci_stack->new_page_scan_type = 0xff; 3297 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3298 #endif 3299 3300 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3301 hci_stack->classic_read_local_oob_data = true; 3302 #endif 3303 3304 // LE 3305 #ifdef ENABLE_BLE 3306 memset(hci_stack->le_random_address, 0, 6); 3307 hci_stack->le_random_address_set = 0; 3308 #endif 3309 #ifdef ENABLE_LE_CENTRAL 3310 hci_stack->le_scanning_active = false; 3311 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3312 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3313 hci_stack->le_whitelist_capacity = 0; 3314 #endif 3315 #ifdef ENABLE_LE_PERIPHERAL 3316 hci_stack->le_advertisements_active = false; 3317 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3318 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3319 } 3320 if (hci_stack->le_advertisements_data != NULL){ 3321 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3322 } 3323 #endif 3324 } 3325 3326 #ifdef ENABLE_CLASSIC 3327 /** 3328 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3329 */ 3330 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3331 // store and open remote device db 3332 hci_stack->link_key_db = link_key_db; 3333 if (hci_stack->link_key_db) { 3334 hci_stack->link_key_db->open(); 3335 } 3336 } 3337 #endif 3338 3339 void hci_init(const hci_transport_t *transport, const void *config){ 3340 3341 #ifdef HAVE_MALLOC 3342 if (!hci_stack) { 3343 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3344 } 3345 #else 3346 hci_stack = &hci_stack_static; 3347 #endif 3348 memset(hci_stack, 0, sizeof(hci_stack_t)); 3349 3350 // reference to use transport layer implementation 3351 hci_stack->hci_transport = transport; 3352 3353 // reference to used config 3354 hci_stack->config = config; 3355 3356 // setup pointer for outgoing packet buffer 3357 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3358 3359 // max acl payload size defined in config.h 3360 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3361 3362 // register packet handlers with transport 3363 transport->register_packet_handler(&packet_handler); 3364 3365 hci_stack->state = HCI_STATE_OFF; 3366 3367 // class of device 3368 hci_stack->class_of_device = 0x007a020c; // Smartphone 3369 3370 // bondable by default 3371 hci_stack->bondable = 1; 3372 3373 #ifdef ENABLE_CLASSIC 3374 // classic name 3375 hci_stack->local_name = default_classic_name; 3376 3377 // Master slave policy 3378 hci_stack->master_slave_policy = 1; 3379 3380 // Allow Role Switch 3381 hci_stack->allow_role_switch = 1; 3382 3383 // Default / minimum security level = 2 3384 hci_stack->gap_security_level = LEVEL_2; 3385 3386 // Default Security Mode 4 3387 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3388 3389 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3390 hci_stack->gap_required_encyrption_key_size = 7; 3391 3392 // Link Supervision Timeout 3393 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3394 3395 #endif 3396 3397 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3398 hci_stack->ssp_enable = 1; 3399 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3400 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3401 hci_stack->ssp_auto_accept = 1; 3402 3403 // Secure Connections: enable (requires support from Controller) 3404 hci_stack->secure_connections_enable = true; 3405 3406 // voice setting - signed 16 bit pcm data with CVSD over the air 3407 hci_stack->sco_voice_setting = 0x60; 3408 3409 #ifdef ENABLE_LE_CENTRAL 3410 // connection parameter to use for outgoing connections 3411 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3412 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3413 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3414 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3415 hci_stack->le_connection_latency = 4; // 4 3416 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3417 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3418 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3419 3420 // default LE Scanning 3421 hci_stack->le_scan_type = 0x1; // active 3422 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3423 hci_stack->le_scan_window = 0x30; // 30 ms 3424 #endif 3425 3426 #ifdef ENABLE_LE_PERIPHERAL 3427 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3428 #endif 3429 3430 // connection parameter range used to answer connection parameter update requests in l2cap 3431 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3432 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3433 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3434 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3435 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3436 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3437 3438 hci_state_reset(); 3439 } 3440 3441 void hci_deinit(void){ 3442 #ifdef HAVE_MALLOC 3443 if (hci_stack) { 3444 free(hci_stack); 3445 } 3446 #endif 3447 hci_stack = NULL; 3448 3449 #ifdef ENABLE_CLASSIC 3450 disable_l2cap_timeouts = 0; 3451 #endif 3452 } 3453 3454 /** 3455 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3456 */ 3457 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3458 hci_stack->chipset = chipset_driver; 3459 3460 // reset chipset driver - init is also called on power_up 3461 if (hci_stack->chipset && hci_stack->chipset->init){ 3462 hci_stack->chipset->init(hci_stack->config); 3463 } 3464 } 3465 3466 /** 3467 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3468 */ 3469 void hci_set_control(const btstack_control_t *hardware_control){ 3470 // references to used control implementation 3471 hci_stack->control = hardware_control; 3472 // init with transport config 3473 hardware_control->init(hci_stack->config); 3474 } 3475 3476 void hci_close(void){ 3477 3478 #ifdef ENABLE_CLASSIC 3479 // close remote device db 3480 if (hci_stack->link_key_db) { 3481 hci_stack->link_key_db->close(); 3482 } 3483 #endif 3484 3485 btstack_linked_list_iterator_t lit; 3486 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3487 while (btstack_linked_list_iterator_has_next(&lit)){ 3488 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3489 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3490 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3491 hci_shutdown_connection(connection); 3492 } 3493 3494 hci_power_control(HCI_POWER_OFF); 3495 3496 #ifdef HAVE_MALLOC 3497 free(hci_stack); 3498 #endif 3499 hci_stack = NULL; 3500 } 3501 3502 #ifdef HAVE_SCO_TRANSPORT 3503 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3504 hci_stack->sco_transport = sco_transport; 3505 sco_transport->register_packet_handler(&packet_handler); 3506 } 3507 #endif 3508 3509 #ifdef ENABLE_CLASSIC 3510 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3511 // validate ranage and set 3512 if (encryption_key_size < 7) return; 3513 if (encryption_key_size > 16) return; 3514 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3515 } 3516 3517 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3518 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3519 hci_stack->gap_security_mode = security_mode; 3520 return ERROR_CODE_SUCCESS; 3521 } else { 3522 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3523 } 3524 } 3525 3526 gap_security_mode_t gap_get_security_mode(void){ 3527 return hci_stack->gap_security_mode; 3528 } 3529 3530 void gap_set_security_level(gap_security_level_t security_level){ 3531 hci_stack->gap_security_level = security_level; 3532 } 3533 3534 gap_security_level_t gap_get_security_level(void){ 3535 if (hci_stack->gap_secure_connections_only_mode){ 3536 return LEVEL_4; 3537 } 3538 return hci_stack->gap_security_level; 3539 } 3540 3541 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3542 hci_stack->gap_minimal_service_security_level = security_level; 3543 } 3544 3545 void gap_set_secure_connections_only_mode(bool enable){ 3546 hci_stack->gap_secure_connections_only_mode = enable; 3547 } 3548 3549 bool gap_get_secure_connections_only_mode(void){ 3550 return hci_stack->gap_secure_connections_only_mode; 3551 } 3552 #endif 3553 3554 #ifdef ENABLE_CLASSIC 3555 void gap_set_class_of_device(uint32_t class_of_device){ 3556 hci_stack->class_of_device = class_of_device; 3557 } 3558 3559 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3560 hci_stack->default_link_policy_settings = default_link_policy_settings; 3561 } 3562 3563 void gap_set_allow_role_switch(bool allow_role_switch){ 3564 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3565 } 3566 3567 uint8_t hci_get_allow_role_switch(void){ 3568 return hci_stack->allow_role_switch; 3569 } 3570 3571 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3572 hci_stack->link_supervision_timeout = link_supervision_timeout; 3573 } 3574 3575 void hci_disable_l2cap_timeout_check(void){ 3576 disable_l2cap_timeouts = 1; 3577 } 3578 #endif 3579 3580 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3581 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3582 void hci_set_bd_addr(bd_addr_t addr){ 3583 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3584 hci_stack->custom_bd_addr_set = 1; 3585 } 3586 #endif 3587 3588 // State-Module-Driver overview 3589 // state module low-level 3590 // HCI_STATE_OFF off close 3591 // HCI_STATE_INITIALIZING, on open 3592 // HCI_STATE_WORKING, on open 3593 // HCI_STATE_HALTING, on open 3594 // HCI_STATE_SLEEPING, off/sleep close 3595 // HCI_STATE_FALLING_ASLEEP on open 3596 3597 static int hci_power_control_on(void){ 3598 3599 // power on 3600 int err = 0; 3601 if (hci_stack->control && hci_stack->control->on){ 3602 err = (*hci_stack->control->on)(); 3603 } 3604 if (err){ 3605 log_error( "POWER_ON failed"); 3606 hci_emit_hci_open_failed(); 3607 return err; 3608 } 3609 3610 // int chipset driver 3611 if (hci_stack->chipset && hci_stack->chipset->init){ 3612 hci_stack->chipset->init(hci_stack->config); 3613 } 3614 3615 // init transport 3616 if (hci_stack->hci_transport->init){ 3617 hci_stack->hci_transport->init(hci_stack->config); 3618 } 3619 3620 // open transport 3621 err = hci_stack->hci_transport->open(); 3622 if (err){ 3623 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3624 if (hci_stack->control && hci_stack->control->off){ 3625 (*hci_stack->control->off)(); 3626 } 3627 hci_emit_hci_open_failed(); 3628 return err; 3629 } 3630 return 0; 3631 } 3632 3633 static void hci_power_control_off(void){ 3634 3635 log_info("hci_power_control_off"); 3636 3637 // close low-level device 3638 hci_stack->hci_transport->close(); 3639 3640 log_info("hci_power_control_off - hci_transport closed"); 3641 3642 // power off 3643 if (hci_stack->control && hci_stack->control->off){ 3644 (*hci_stack->control->off)(); 3645 } 3646 3647 log_info("hci_power_control_off - control closed"); 3648 3649 hci_stack->state = HCI_STATE_OFF; 3650 } 3651 3652 static void hci_power_control_sleep(void){ 3653 3654 log_info("hci_power_control_sleep"); 3655 3656 #if 0 3657 // don't close serial port during sleep 3658 3659 // close low-level device 3660 hci_stack->hci_transport->close(hci_stack->config); 3661 #endif 3662 3663 // sleep mode 3664 if (hci_stack->control && hci_stack->control->sleep){ 3665 (*hci_stack->control->sleep)(); 3666 } 3667 3668 hci_stack->state = HCI_STATE_SLEEPING; 3669 } 3670 3671 static int hci_power_control_wake(void){ 3672 3673 log_info("hci_power_control_wake"); 3674 3675 // wake on 3676 if (hci_stack->control && hci_stack->control->wake){ 3677 (*hci_stack->control->wake)(); 3678 } 3679 3680 #if 0 3681 // open low-level device 3682 int err = hci_stack->hci_transport->open(hci_stack->config); 3683 if (err){ 3684 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3685 if (hci_stack->control && hci_stack->control->off){ 3686 (*hci_stack->control->off)(); 3687 } 3688 hci_emit_hci_open_failed(); 3689 return err; 3690 } 3691 #endif 3692 3693 return 0; 3694 } 3695 3696 static void hci_power_transition_to_initializing(void){ 3697 // set up state machine 3698 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3699 hci_stack->hci_packet_buffer_reserved = 0; 3700 hci_stack->state = HCI_STATE_INITIALIZING; 3701 hci_stack->substate = HCI_INIT_SEND_RESET; 3702 } 3703 3704 // returns error 3705 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3706 int err; 3707 switch (power_mode){ 3708 case HCI_POWER_ON: 3709 err = hci_power_control_on(); 3710 if (err != 0) { 3711 log_error("hci_power_control_on() error %d", err); 3712 return err; 3713 } 3714 hci_power_transition_to_initializing(); 3715 break; 3716 case HCI_POWER_OFF: 3717 // do nothing 3718 break; 3719 case HCI_POWER_SLEEP: 3720 // do nothing (with SLEEP == OFF) 3721 break; 3722 default: 3723 btstack_assert(false); 3724 break; 3725 } 3726 return ERROR_CODE_SUCCESS; 3727 } 3728 3729 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3730 switch (power_mode){ 3731 case HCI_POWER_ON: 3732 // do nothing 3733 break; 3734 case HCI_POWER_OFF: 3735 // no connections yet, just turn it off 3736 hci_power_control_off(); 3737 break; 3738 case HCI_POWER_SLEEP: 3739 // no connections yet, just turn it off 3740 hci_power_control_sleep(); 3741 break; 3742 default: 3743 btstack_assert(false); 3744 break; 3745 } 3746 return ERROR_CODE_SUCCESS; 3747 } 3748 3749 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3750 switch (power_mode){ 3751 case HCI_POWER_ON: 3752 // do nothing 3753 break; 3754 case HCI_POWER_OFF: 3755 // see hci_run 3756 hci_stack->state = HCI_STATE_HALTING; 3757 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3758 break; 3759 case HCI_POWER_SLEEP: 3760 // see hci_run 3761 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3762 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3763 break; 3764 default: 3765 btstack_assert(false); 3766 break; 3767 } 3768 return ERROR_CODE_SUCCESS; 3769 } 3770 3771 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3772 switch (power_mode){ 3773 case HCI_POWER_ON: 3774 hci_power_transition_to_initializing(); 3775 break; 3776 case HCI_POWER_OFF: 3777 // do nothing 3778 break; 3779 case HCI_POWER_SLEEP: 3780 // see hci_run 3781 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3782 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3783 break; 3784 default: 3785 btstack_assert(false); 3786 break; 3787 } 3788 return ERROR_CODE_SUCCESS; 3789 } 3790 3791 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3792 switch (power_mode){ 3793 case HCI_POWER_ON: 3794 3795 #ifdef HAVE_PLATFORM_IPHONE_OS 3796 // nothing to do, if H4 supports power management 3797 if (btstack_control_iphone_power_management_enabled()){ 3798 hci_stack->state = HCI_STATE_INITIALIZING; 3799 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3800 break; 3801 } 3802 #endif 3803 hci_power_transition_to_initializing(); 3804 break; 3805 case HCI_POWER_OFF: 3806 // see hci_run 3807 hci_stack->state = HCI_STATE_HALTING; 3808 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3809 break; 3810 case HCI_POWER_SLEEP: 3811 // do nothing 3812 break; 3813 default: 3814 btstack_assert(false); 3815 break; 3816 } 3817 return ERROR_CODE_SUCCESS; 3818 } 3819 3820 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3821 int err; 3822 switch (power_mode){ 3823 case HCI_POWER_ON: 3824 #ifdef HAVE_PLATFORM_IPHONE_OS 3825 // nothing to do, if H4 supports power management 3826 if (btstack_control_iphone_power_management_enabled()){ 3827 hci_stack->state = HCI_STATE_INITIALIZING; 3828 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3829 hci_update_scan_enable(); 3830 break; 3831 } 3832 #endif 3833 err = hci_power_control_wake(); 3834 if (err) return err; 3835 hci_power_transition_to_initializing(); 3836 break; 3837 case HCI_POWER_OFF: 3838 hci_stack->state = HCI_STATE_HALTING; 3839 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3840 break; 3841 case HCI_POWER_SLEEP: 3842 // do nothing 3843 break; 3844 default: 3845 btstack_assert(false); 3846 break; 3847 } 3848 return ERROR_CODE_SUCCESS; 3849 } 3850 3851 int hci_power_control(HCI_POWER_MODE power_mode){ 3852 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3853 int err = 0; 3854 switch (hci_stack->state){ 3855 case HCI_STATE_OFF: 3856 err = hci_power_control_state_off(power_mode); 3857 break; 3858 case HCI_STATE_INITIALIZING: 3859 err = hci_power_control_state_initializing(power_mode); 3860 break; 3861 case HCI_STATE_WORKING: 3862 err = hci_power_control_state_working(power_mode); 3863 break; 3864 case HCI_STATE_HALTING: 3865 err = hci_power_control_state_halting(power_mode); 3866 break; 3867 case HCI_STATE_FALLING_ASLEEP: 3868 err = hci_power_control_state_falling_asleep(power_mode); 3869 break; 3870 case HCI_STATE_SLEEPING: 3871 err = hci_power_control_state_sleeping(power_mode); 3872 break; 3873 default: 3874 btstack_assert(false); 3875 break; 3876 } 3877 if (err != 0){ 3878 return err; 3879 } 3880 3881 // create internal event 3882 hci_emit_state(); 3883 3884 // trigger next/first action 3885 hci_run(); 3886 3887 return 0; 3888 } 3889 3890 3891 #ifdef ENABLE_CLASSIC 3892 3893 static void hci_update_scan_enable(void){ 3894 // 2 = page scan, 1 = inq scan 3895 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3896 hci_run(); 3897 } 3898 3899 void gap_discoverable_control(uint8_t enable){ 3900 if (enable) enable = 1; // normalize argument 3901 3902 if (hci_stack->discoverable == enable){ 3903 hci_emit_discoverable_enabled(hci_stack->discoverable); 3904 return; 3905 } 3906 3907 hci_stack->discoverable = enable; 3908 hci_update_scan_enable(); 3909 } 3910 3911 void gap_connectable_control(uint8_t enable){ 3912 if (enable) enable = 1; // normalize argument 3913 3914 // don't emit event 3915 if (hci_stack->connectable == enable) return; 3916 3917 hci_stack->connectable = enable; 3918 hci_update_scan_enable(); 3919 } 3920 #endif 3921 3922 void gap_local_bd_addr(bd_addr_t address_buffer){ 3923 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3924 } 3925 3926 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3927 static void hci_host_num_completed_packets(void){ 3928 3929 // create packet manually as arrays are not supported and num_commands should not get reduced 3930 hci_reserve_packet_buffer(); 3931 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3932 3933 uint16_t size = 0; 3934 uint16_t num_handles = 0; 3935 packet[size++] = 0x35; 3936 packet[size++] = 0x0c; 3937 size++; // skip param len 3938 size++; // skip num handles 3939 3940 // add { handle, packets } entries 3941 btstack_linked_item_t * it; 3942 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3943 hci_connection_t * connection = (hci_connection_t *) it; 3944 if (connection->num_packets_completed){ 3945 little_endian_store_16(packet, size, connection->con_handle); 3946 size += 2; 3947 little_endian_store_16(packet, size, connection->num_packets_completed); 3948 size += 2; 3949 // 3950 num_handles++; 3951 connection->num_packets_completed = 0; 3952 } 3953 } 3954 3955 packet[2] = size - 3; 3956 packet[3] = num_handles; 3957 3958 hci_stack->host_completed_packets = 0; 3959 3960 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3961 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3962 3963 // release packet buffer for synchronous transport implementations 3964 if (hci_transport_synchronous()){ 3965 hci_release_packet_buffer(); 3966 hci_emit_transport_packet_sent(); 3967 } 3968 } 3969 #endif 3970 3971 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3972 UNUSED(ds); 3973 hci_stack->substate = HCI_HALTING_CLOSE; 3974 // allow packet handlers to defer final shutdown 3975 hci_emit_state(); 3976 hci_run(); 3977 } 3978 3979 static bool hci_run_acl_fragments(void){ 3980 if (hci_stack->acl_fragmentation_total_size > 0u) { 3981 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3982 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3983 if (connection) { 3984 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3985 hci_send_acl_packet_fragments(connection); 3986 return true; 3987 } 3988 } else { 3989 // connection gone -> discard further fragments 3990 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3991 hci_stack->acl_fragmentation_total_size = 0; 3992 hci_stack->acl_fragmentation_pos = 0; 3993 } 3994 } 3995 return false; 3996 } 3997 3998 #ifdef ENABLE_CLASSIC 3999 static bool hci_run_general_gap_classic(void){ 4000 4001 // decline incoming connections 4002 if (hci_stack->decline_reason){ 4003 uint8_t reason = hci_stack->decline_reason; 4004 hci_stack->decline_reason = 0; 4005 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4006 return true; 4007 } 4008 // write page scan activity 4009 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4010 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4011 hci_stack->new_page_scan_interval = 0xffff; 4012 hci_stack->new_page_scan_window = 0xffff; 4013 return true; 4014 } 4015 // write page scan type 4016 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4017 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4018 hci_stack->new_page_scan_type = 0xff; 4019 return true; 4020 } 4021 // send scan enable 4022 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4023 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4024 hci_stack->new_scan_enable_value = 0xff; 4025 return true; 4026 } 4027 // start/stop inquiry 4028 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4029 uint8_t duration = hci_stack->inquiry_state; 4030 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4031 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4032 return true; 4033 } 4034 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4035 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4036 hci_send_cmd(&hci_inquiry_cancel); 4037 return true; 4038 } 4039 // remote name request 4040 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4041 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4042 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4043 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4044 return true; 4045 } 4046 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4047 // Local OOB data 4048 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4049 hci_stack->classic_read_local_oob_data = false; 4050 if (hci_stack->local_supported_commands[1] & 0x10u){ 4051 hci_send_cmd(&hci_read_local_extended_oob_data); 4052 } else { 4053 hci_send_cmd(&hci_read_local_oob_data); 4054 } 4055 } 4056 #endif 4057 // pairing 4058 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4059 uint8_t state = hci_stack->gap_pairing_state; 4060 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4061 uint8_t pin_code[16]; 4062 switch (state){ 4063 case GAP_PAIRING_STATE_SEND_PIN: 4064 memset(pin_code, 0, 16); 4065 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4066 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4067 break; 4068 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4069 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4070 break; 4071 case GAP_PAIRING_STATE_SEND_PASSKEY: 4072 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4073 break; 4074 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4075 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4076 break; 4077 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4078 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4079 break; 4080 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4081 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4082 break; 4083 default: 4084 break; 4085 } 4086 return true; 4087 } 4088 return false; 4089 } 4090 #endif 4091 4092 #ifdef ENABLE_BLE 4093 static bool hci_run_general_gap_le(void){ 4094 4095 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4096 4097 if (hci_stack->state != HCI_STATE_WORKING) return false; 4098 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4099 4100 4101 // Phase 1: collect what to stop 4102 4103 bool scanning_stop = false; 4104 bool connecting_stop = false; 4105 bool advertising_stop = false; 4106 4107 #ifndef ENABLE_LE_CENTRAL 4108 UNUSED(scanning_stop); 4109 UNUSED(connecting_stop); 4110 #endif 4111 #ifndef ENABLE_LE_PERIPHERAL 4112 UNUSED(advertising_stop); 4113 #endif 4114 4115 // check if whitelist needs modification 4116 bool whitelist_modification_pending = false; 4117 btstack_linked_list_iterator_t lit; 4118 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4119 while (btstack_linked_list_iterator_has_next(&lit)){ 4120 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4121 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4122 whitelist_modification_pending = true; 4123 break; 4124 } 4125 } 4126 // check if resolving list needs modification 4127 bool resolving_list_modification_pending = false; 4128 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4129 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4130 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4131 resolving_list_modification_pending = true; 4132 } 4133 #endif 4134 4135 #ifdef ENABLE_LE_CENTRAL 4136 // scanning control 4137 if (hci_stack->le_scanning_active) { 4138 // stop if: 4139 // - parameter change required 4140 // - it's disabled 4141 // - whitelist change required but used for scanning 4142 // - resolving list modified 4143 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4144 if ((hci_stack->le_scanning_param_update) || 4145 !hci_stack->le_scanning_enabled || 4146 scanning_uses_whitelist || 4147 resolving_list_modification_pending){ 4148 4149 scanning_stop = true; 4150 } 4151 } 4152 #endif 4153 4154 #ifdef ENABLE_LE_CENTRAL 4155 // connecting control 4156 bool connecting_with_whitelist; 4157 switch (hci_stack->le_connecting_state){ 4158 case LE_CONNECTING_DIRECT: 4159 case LE_CONNECTING_WHITELIST: 4160 // stop connecting if: 4161 // - connecting uses white and whitelist modification pending 4162 // - if it got disabled 4163 // - resolving list modified 4164 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4165 if ((connecting_with_whitelist && whitelist_modification_pending) || 4166 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4167 resolving_list_modification_pending) { 4168 4169 connecting_stop = true; 4170 } 4171 break; 4172 default: 4173 break; 4174 } 4175 #endif 4176 4177 #ifdef ENABLE_LE_PERIPHERAL 4178 // le advertisement control 4179 if (hci_stack->le_advertisements_active){ 4180 // stop if: 4181 // - parameter change required 4182 // - it's disabled 4183 // - whitelist change required but used for advertisement filter policy 4184 // - resolving list modified 4185 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4186 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4187 if (advertising_change || 4188 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4189 (advertising_uses_whitelist & whitelist_modification_pending) || 4190 resolving_list_modification_pending) { 4191 4192 advertising_stop = true; 4193 } 4194 } 4195 #endif 4196 4197 4198 // Phase 2: stop everything that should be off during modifications 4199 4200 #ifdef ENABLE_LE_CENTRAL 4201 if (scanning_stop){ 4202 hci_stack->le_scanning_active = false; 4203 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4204 return true; 4205 } 4206 #endif 4207 4208 #ifdef ENABLE_LE_CENTRAL 4209 if (connecting_stop){ 4210 hci_send_cmd(&hci_le_create_connection_cancel); 4211 return true; 4212 } 4213 #endif 4214 4215 #ifdef ENABLE_LE_PERIPHERAL 4216 if (advertising_stop){ 4217 hci_stack->le_advertisements_active = false; 4218 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4219 return true; 4220 } 4221 #endif 4222 4223 // Phase 3: modify 4224 4225 #ifdef ENABLE_LE_CENTRAL 4226 if (hci_stack->le_scanning_param_update){ 4227 hci_stack->le_scanning_param_update = false; 4228 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4229 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4230 return true; 4231 } 4232 #endif 4233 4234 #ifdef ENABLE_LE_PERIPHERAL 4235 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4236 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4237 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4238 hci_send_cmd(&hci_le_set_advertising_parameters, 4239 hci_stack->le_advertisements_interval_min, 4240 hci_stack->le_advertisements_interval_max, 4241 hci_stack->le_advertisements_type, 4242 hci_stack->le_advertisements_own_addr_type, 4243 hci_stack->le_advertisements_direct_address_type, 4244 hci_stack->le_advertisements_direct_address, 4245 hci_stack->le_advertisements_channel_map, 4246 hci_stack->le_advertisements_filter_policy); 4247 return true; 4248 } 4249 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4250 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4251 uint8_t adv_data_clean[31]; 4252 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4253 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4254 hci_stack->le_advertisements_data_len); 4255 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4256 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4257 return true; 4258 } 4259 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4260 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4261 uint8_t scan_data_clean[31]; 4262 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4263 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4264 hci_stack->le_scan_response_data_len); 4265 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4266 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4267 return true; 4268 } 4269 #endif 4270 4271 4272 #ifdef ENABLE_LE_CENTRAL 4273 // if connect with whitelist was active and is not cancelled yet, wait until next time 4274 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4275 #endif 4276 4277 // LE Whitelist Management 4278 if (whitelist_modification_pending){ 4279 // add/remove entries 4280 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4281 while (btstack_linked_list_iterator_has_next(&lit)){ 4282 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4283 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4284 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4285 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4286 return true; 4287 } 4288 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4289 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4290 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4291 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4292 return true; 4293 } 4294 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4295 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4296 btstack_memory_whitelist_entry_free(entry); 4297 } 4298 } 4299 } 4300 4301 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4302 // LE Resolving List Management 4303 if (resolving_list_supported) { 4304 uint16_t i; 4305 switch (hci_stack->le_resolving_list_state) { 4306 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4307 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4308 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4309 return true; 4310 case LE_RESOLVING_LIST_READ_SIZE: 4311 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4312 hci_send_cmd(&hci_le_read_resolving_list_size); 4313 return true; 4314 case LE_RESOLVING_LIST_SEND_CLEAR: 4315 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4316 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4317 sizeof(hci_stack->le_resolving_list_add_entries)); 4318 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4319 sizeof(hci_stack->le_resolving_list_remove_entries)); 4320 hci_send_cmd(&hci_le_clear_resolving_list); 4321 return true; 4322 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4323 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4324 uint8_t offset = i >> 3; 4325 uint8_t mask = 1 << (i & 7); 4326 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4327 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4328 bd_addr_t peer_identity_addreses; 4329 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4330 sm_key_t peer_irk; 4331 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4332 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4333 4334 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4335 // trigger whitelist entry 'update' (work around for controller bug) 4336 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4337 while (btstack_linked_list_iterator_has_next(&lit)) { 4338 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4339 if (entry->address_type != peer_identity_addr_type) continue; 4340 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4341 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4342 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4343 } 4344 #endif 4345 4346 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4347 peer_identity_addreses); 4348 return true; 4349 } 4350 4351 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4352 4353 /* fall through */ 4354 4355 case LE_RESOLVING_LIST_ADD_ENTRIES: 4356 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4357 uint8_t offset = i >> 3; 4358 uint8_t mask = 1 << (i & 7); 4359 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4360 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4361 bd_addr_t peer_identity_addreses; 4362 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4363 sm_key_t peer_irk; 4364 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4365 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4366 const uint8_t *local_irk = gap_get_persistent_irk(); 4367 // command uses format specifier 'P' that stores 16-byte value without flip 4368 uint8_t local_irk_flipped[16]; 4369 uint8_t peer_irk_flipped[16]; 4370 reverse_128(local_irk, local_irk_flipped); 4371 reverse_128(peer_irk, peer_irk_flipped); 4372 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4373 peer_irk_flipped, local_irk_flipped); 4374 return true; 4375 } 4376 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4377 break; 4378 4379 default: 4380 break; 4381 } 4382 } 4383 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4384 #endif 4385 4386 // Phase 4: restore state 4387 4388 #ifdef ENABLE_LE_CENTRAL 4389 // re-start scanning 4390 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4391 hci_stack->le_scanning_active = true; 4392 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4393 return true; 4394 } 4395 #endif 4396 4397 #ifdef ENABLE_LE_CENTRAL 4398 // re-start connecting 4399 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4400 bd_addr_t null_addr; 4401 memset(null_addr, 0, 6); 4402 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4403 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4404 hci_send_cmd(&hci_le_create_connection, 4405 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4406 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4407 1, // use whitelist 4408 0, // peer address type 4409 null_addr, // peer bd addr 4410 hci_stack->le_connection_own_addr_type, // our addr type: 4411 hci_stack->le_connection_interval_min, // conn interval min 4412 hci_stack->le_connection_interval_max, // conn interval max 4413 hci_stack->le_connection_latency, // conn latency 4414 hci_stack->le_supervision_timeout, // conn latency 4415 hci_stack->le_minimum_ce_length, // min ce length 4416 hci_stack->le_maximum_ce_length // max ce length 4417 ); 4418 return true; 4419 } 4420 #endif 4421 4422 #ifdef ENABLE_LE_PERIPHERAL 4423 // re-start advertising 4424 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4425 // check if advertisements should be enabled given 4426 hci_stack->le_advertisements_active = true; 4427 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4428 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4429 return true; 4430 } 4431 #endif 4432 4433 return false; 4434 } 4435 #endif 4436 4437 static bool hci_run_general_pending_commands(void){ 4438 btstack_linked_item_t * it; 4439 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4440 hci_connection_t * connection = (hci_connection_t *) it; 4441 4442 switch(connection->state){ 4443 case SEND_CREATE_CONNECTION: 4444 switch(connection->address_type){ 4445 #ifdef ENABLE_CLASSIC 4446 case BD_ADDR_TYPE_ACL: 4447 log_info("sending hci_create_connection"); 4448 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4449 break; 4450 #endif 4451 default: 4452 #ifdef ENABLE_BLE 4453 #ifdef ENABLE_LE_CENTRAL 4454 log_info("sending hci_le_create_connection"); 4455 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4456 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4457 hci_send_cmd(&hci_le_create_connection, 4458 hci_stack->le_connection_scan_interval, // conn scan interval 4459 hci_stack->le_connection_scan_window, // conn scan windows 4460 0, // don't use whitelist 4461 connection->address_type, // peer address type 4462 connection->address, // peer bd addr 4463 hci_stack->le_connection_own_addr_type, // our addr type: 4464 hci_stack->le_connection_interval_min, // conn interval min 4465 hci_stack->le_connection_interval_max, // conn interval max 4466 hci_stack->le_connection_latency, // conn latency 4467 hci_stack->le_supervision_timeout, // conn latency 4468 hci_stack->le_minimum_ce_length, // min ce length 4469 hci_stack->le_maximum_ce_length // max ce length 4470 ); 4471 connection->state = SENT_CREATE_CONNECTION; 4472 #endif 4473 #endif 4474 break; 4475 } 4476 return true; 4477 4478 #ifdef ENABLE_CLASSIC 4479 case RECEIVED_CONNECTION_REQUEST: 4480 connection->role = HCI_ROLE_SLAVE; 4481 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4482 log_info("sending hci_accept_connection_request"); 4483 connection->state = ACCEPTED_CONNECTION_REQUEST; 4484 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4485 } 4486 return true; 4487 #endif 4488 4489 #ifdef ENABLE_BLE 4490 #ifdef ENABLE_LE_CENTRAL 4491 case SEND_CANCEL_CONNECTION: 4492 connection->state = SENT_CANCEL_CONNECTION; 4493 hci_send_cmd(&hci_le_create_connection_cancel); 4494 return true; 4495 #endif 4496 #endif 4497 case SEND_DISCONNECT: 4498 connection->state = SENT_DISCONNECT; 4499 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4500 return true; 4501 4502 default: 4503 break; 4504 } 4505 4506 // no further commands if connection is about to get shut down 4507 if (connection->state == SENT_DISCONNECT) continue; 4508 4509 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4510 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4511 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4512 return true; 4513 } 4514 4515 #ifdef ENABLE_CLASSIC 4516 4517 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4518 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4519 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4520 return true; 4521 } 4522 4523 // Handling link key request requires remote supported features 4524 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4525 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4526 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4527 4528 // lookup link key using cached key first 4529 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4530 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4531 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4532 } 4533 4534 bool sc_enabled_remote = hci_remote_sc_enabled(connection); 4535 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4536 if (sc_downgrade){ 4537 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4538 connection->state = SENT_DISCONNECT; 4539 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4540 return true; 4541 } 4542 4543 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4544 if (have_link_key && security_level_sufficient){ 4545 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4546 } else { 4547 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4548 } 4549 return true; 4550 } 4551 4552 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4553 log_info("denying to pin request"); 4554 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4555 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4556 return true; 4557 } 4558 4559 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4560 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4561 // set authentication requirements: 4562 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4563 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4564 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4565 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4566 authreq |= 1; 4567 } 4568 bool bonding = hci_stack->bondable; 4569 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4570 // if we have received IO Cap Response, we're in responder role 4571 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4572 if (bonding && !remote_bonding){ 4573 log_info("Remote not bonding, dropping local flag"); 4574 bonding = false; 4575 } 4576 } 4577 if (bonding){ 4578 if (connection->bonding_flags & BONDING_DEDICATED){ 4579 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4580 } else { 4581 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4582 } 4583 } 4584 uint8_t have_oob_data = 0; 4585 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4586 if (connection->classic_oob_c_192 != NULL){ 4587 have_oob_data |= 1; 4588 } 4589 if (connection->classic_oob_c_256 != NULL){ 4590 have_oob_data |= 2; 4591 } 4592 #endif 4593 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4594 return true; 4595 } 4596 4597 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4598 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4599 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4600 return true; 4601 } 4602 4603 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4604 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4605 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4606 const uint8_t zero[16] = { 0 }; 4607 const uint8_t * r_192 = zero; 4608 const uint8_t * c_192 = zero; 4609 const uint8_t * r_256 = zero; 4610 const uint8_t * c_256 = zero; 4611 // verify P-256 OOB 4612 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4613 c_256 = connection->classic_oob_c_256; 4614 if (connection->classic_oob_r_256 != NULL) { 4615 r_256 = connection->classic_oob_r_256; 4616 } 4617 } 4618 // verify P-192 OOB 4619 if ((connection->classic_oob_c_192 != NULL)) { 4620 c_192 = connection->classic_oob_c_192; 4621 if (connection->classic_oob_r_192 != NULL) { 4622 r_192 = connection->classic_oob_r_192; 4623 } 4624 } 4625 // Reply 4626 if (c_256 != zero) { 4627 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4628 } else if (c_192 != zero){ 4629 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4630 } else { 4631 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4632 } 4633 return true; 4634 } 4635 #endif 4636 4637 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4638 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4639 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4640 return true; 4641 } 4642 4643 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4644 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4645 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4646 return true; 4647 } 4648 4649 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4650 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4651 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4652 return true; 4653 } 4654 4655 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4656 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4657 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4658 return true; 4659 } 4660 4661 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4662 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4663 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4664 return true; 4665 } 4666 4667 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4668 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4669 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4670 return true; 4671 } 4672 4673 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4674 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4675 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4676 connection->state = SENT_DISCONNECT; 4677 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4678 return true; 4679 } 4680 4681 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4682 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4683 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4684 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4685 return true; 4686 } 4687 4688 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4689 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4690 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4691 return true; 4692 } 4693 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4694 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4695 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4696 return true; 4697 } 4698 #endif 4699 4700 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4701 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4702 #ifdef ENABLE_CLASSIC 4703 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4704 #endif 4705 if (connection->state != SENT_DISCONNECT){ 4706 connection->state = SENT_DISCONNECT; 4707 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4708 return true; 4709 } 4710 } 4711 4712 #ifdef ENABLE_CLASSIC 4713 uint16_t sniff_min_interval; 4714 switch (connection->sniff_min_interval){ 4715 case 0: 4716 break; 4717 case 0xffff: 4718 connection->sniff_min_interval = 0; 4719 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4720 return true; 4721 default: 4722 sniff_min_interval = connection->sniff_min_interval; 4723 connection->sniff_min_interval = 0; 4724 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4725 return true; 4726 } 4727 4728 if (connection->sniff_subrating_max_latency != 0xffff){ 4729 uint16_t max_latency = connection->sniff_subrating_max_latency; 4730 connection->sniff_subrating_max_latency = 0; 4731 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4732 return true; 4733 } 4734 4735 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4736 uint8_t service_type = (uint8_t) connection->qos_service_type; 4737 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4738 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); 4739 return true; 4740 } 4741 4742 if (connection->request_role != HCI_ROLE_INVALID){ 4743 hci_role_t role = connection->request_role; 4744 connection->request_role = HCI_ROLE_INVALID; 4745 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4746 return true; 4747 } 4748 #endif 4749 4750 #ifdef ENABLE_BLE 4751 switch (connection->le_con_parameter_update_state){ 4752 // response to L2CAP CON PARAMETER UPDATE REQUEST 4753 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4754 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4755 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4756 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4757 0x0000, 0xffff); 4758 return true; 4759 case CON_PARAMETER_UPDATE_REPLY: 4760 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4761 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4762 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4763 0x0000, 0xffff); 4764 return true; 4765 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4766 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4767 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4768 return true; 4769 default: 4770 break; 4771 } 4772 if (connection->le_phy_update_all_phys != 0xffu){ 4773 uint8_t all_phys = connection->le_phy_update_all_phys; 4774 connection->le_phy_update_all_phys = 0xff; 4775 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); 4776 return true; 4777 } 4778 #endif 4779 } 4780 return false; 4781 } 4782 4783 static void hci_run(void){ 4784 4785 bool done; 4786 4787 // send continuation fragments first, as they block the prepared packet buffer 4788 done = hci_run_acl_fragments(); 4789 if (done) return; 4790 4791 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4792 // send host num completed packets next as they don't require num_cmd_packets > 0 4793 if (!hci_can_send_comand_packet_transport()) return; 4794 if (hci_stack->host_completed_packets){ 4795 hci_host_num_completed_packets(); 4796 return; 4797 } 4798 #endif 4799 4800 if (!hci_can_send_command_packet_now()) return; 4801 4802 // global/non-connection oriented commands 4803 4804 4805 #ifdef ENABLE_CLASSIC 4806 // general gap classic 4807 done = hci_run_general_gap_classic(); 4808 if (done) return; 4809 #endif 4810 4811 #ifdef ENABLE_BLE 4812 // general gap le 4813 done = hci_run_general_gap_le(); 4814 if (done) return; 4815 #endif 4816 4817 // send pending HCI commands 4818 done = hci_run_general_pending_commands(); 4819 if (done) return; 4820 4821 // stack state sub statemachines 4822 hci_connection_t * connection; 4823 switch (hci_stack->state){ 4824 case HCI_STATE_INITIALIZING: 4825 hci_initializing_run(); 4826 break; 4827 4828 case HCI_STATE_HALTING: 4829 4830 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4831 switch (hci_stack->substate){ 4832 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4833 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4834 4835 #ifdef ENABLE_BLE 4836 #ifdef ENABLE_LE_CENTRAL 4837 // free whitelist entries 4838 { 4839 btstack_linked_list_iterator_t lit; 4840 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4841 while (btstack_linked_list_iterator_has_next(&lit)){ 4842 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4843 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4844 btstack_memory_whitelist_entry_free(entry); 4845 } 4846 } 4847 #endif 4848 #endif 4849 // close all open connections 4850 connection = (hci_connection_t *) hci_stack->connections; 4851 if (connection){ 4852 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4853 if (!hci_can_send_command_packet_now()) return; 4854 4855 // check state 4856 if (connection->state == SENT_DISCONNECT) return; 4857 connection->state = SENT_DISCONNECT; 4858 4859 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4860 4861 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4862 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4863 4864 // ... which would be ignored anyway as we shutdown (free) the connection now 4865 hci_shutdown_connection(connection); 4866 4867 // finally, send the disconnect command 4868 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4869 return; 4870 } 4871 4872 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4873 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4874 log_info("HCI_STATE_HALTING: wait 50 ms"); 4875 hci_stack->substate = HCI_HALTING_W4_TIMER; 4876 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4877 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4878 btstack_run_loop_add_timer(&hci_stack->timeout); 4879 break; 4880 } 4881 4882 /* fall through */ 4883 4884 case HCI_HALTING_CLOSE: 4885 log_info("HCI_STATE_HALTING, calling off"); 4886 4887 // switch mode 4888 hci_power_control_off(); 4889 4890 log_info("HCI_STATE_HALTING, emitting state"); 4891 hci_emit_state(); 4892 log_info("HCI_STATE_HALTING, done"); 4893 break; 4894 4895 case HCI_HALTING_W4_TIMER: 4896 // keep waiting 4897 4898 break; 4899 default: 4900 break; 4901 } 4902 4903 break; 4904 4905 case HCI_STATE_FALLING_ASLEEP: 4906 switch(hci_stack->substate) { 4907 case HCI_FALLING_ASLEEP_DISCONNECT: 4908 log_info("HCI_STATE_FALLING_ASLEEP"); 4909 // close all open connections 4910 connection = (hci_connection_t *) hci_stack->connections; 4911 4912 #ifdef HAVE_PLATFORM_IPHONE_OS 4913 // don't close connections, if H4 supports power management 4914 if (btstack_control_iphone_power_management_enabled()){ 4915 connection = NULL; 4916 } 4917 #endif 4918 if (connection){ 4919 4920 // send disconnect 4921 if (!hci_can_send_command_packet_now()) return; 4922 4923 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4924 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4925 4926 // send disconnected event right away - causes higher layer connections to get closed, too. 4927 hci_shutdown_connection(connection); 4928 return; 4929 } 4930 4931 if (hci_classic_supported()){ 4932 // disable page and inquiry scan 4933 if (!hci_can_send_command_packet_now()) return; 4934 4935 log_info("HCI_STATE_HALTING, disabling inq scans"); 4936 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4937 4938 // continue in next sub state 4939 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4940 break; 4941 } 4942 4943 /* fall through */ 4944 4945 case HCI_FALLING_ASLEEP_COMPLETE: 4946 log_info("HCI_STATE_HALTING, calling sleep"); 4947 #ifdef HAVE_PLATFORM_IPHONE_OS 4948 // don't actually go to sleep, if H4 supports power management 4949 if (btstack_control_iphone_power_management_enabled()){ 4950 // SLEEP MODE reached 4951 hci_stack->state = HCI_STATE_SLEEPING; 4952 hci_emit_state(); 4953 break; 4954 } 4955 #endif 4956 // switch mode 4957 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4958 hci_emit_state(); 4959 break; 4960 4961 default: 4962 break; 4963 } 4964 break; 4965 4966 default: 4967 break; 4968 } 4969 } 4970 4971 int hci_send_cmd_packet(uint8_t *packet, int size){ 4972 // house-keeping 4973 4974 #ifdef ENABLE_CLASSIC 4975 bd_addr_t addr; 4976 hci_connection_t * conn; 4977 #endif 4978 #ifdef ENABLE_LE_CENTRAL 4979 uint8_t initiator_filter_policy; 4980 #endif 4981 4982 uint16_t opcode = little_endian_read_16(packet, 0); 4983 switch (opcode) { 4984 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4985 hci_stack->loopback_mode = packet[3]; 4986 break; 4987 4988 #ifdef ENABLE_CLASSIC 4989 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4990 reverse_bd_addr(&packet[3], addr); 4991 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4992 4993 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 4994 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 4995 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 4996 return -1; 4997 } 4998 4999 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5000 if (!conn) { 5001 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5002 if (!conn) { 5003 // notify client that alloc failed 5004 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5005 return -1; // packet not sent to controller 5006 } 5007 conn->state = SEND_CREATE_CONNECTION; 5008 conn->role = HCI_ROLE_MASTER; 5009 } 5010 log_info("conn state %u", conn->state); 5011 switch (conn->state) { 5012 // if connection active exists 5013 case OPEN: 5014 // and OPEN, emit connection complete command 5015 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5016 return -1; // packet not sent to controller 5017 case RECEIVED_DISCONNECTION_COMPLETE: 5018 // create connection triggered in disconnect complete event, let's do it now 5019 break; 5020 case SEND_CREATE_CONNECTION: 5021 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5022 break; 5023 default: 5024 // otherwise, just ignore as it is already in the open process 5025 return -1; // packet not sent to controller 5026 } 5027 conn->state = SENT_CREATE_CONNECTION; 5028 5029 // track outgoing connection 5030 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5031 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5032 break; 5033 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5034 if (hci_stack->link_key_db) { 5035 reverse_bd_addr(&packet[3], addr); 5036 hci_stack->link_key_db->delete_link_key(addr); 5037 } 5038 break; 5039 5040 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5041 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5042 // setup_synchronous_connection? Voice setting at offset 22 5043 // TODO: compare to current setting if sco connection already active 5044 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5045 break; 5046 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5047 // accept_synchronus_connection? Voice setting at offset 18 5048 // TODO: compare to current setting if sco connection already active 5049 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5050 break; 5051 #endif 5052 #endif 5053 5054 #ifdef ENABLE_BLE 5055 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5056 hci_stack->le_random_address_set = 1; 5057 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5058 break; 5059 #ifdef ENABLE_LE_PERIPHERAL 5060 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5061 hci_stack->le_advertisements_active = packet[3] != 0; 5062 break; 5063 #endif 5064 #ifdef ENABLE_LE_CENTRAL 5065 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5066 // white list used? 5067 initiator_filter_policy = packet[7]; 5068 switch (initiator_filter_policy) { 5069 case 0: 5070 // whitelist not used 5071 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5072 break; 5073 case 1: 5074 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5075 break; 5076 default: 5077 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5078 break; 5079 } 5080 // track outgoing connection 5081 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5082 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5083 break; 5084 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5085 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5086 break; 5087 #endif 5088 #endif 5089 default: 5090 break; 5091 } 5092 5093 hci_stack->num_cmd_packets--; 5094 5095 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5096 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5097 } 5098 5099 // disconnect because of security block 5100 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5101 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5102 if (!connection) return; 5103 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5104 } 5105 5106 5107 // Configure Secure Simple Pairing 5108 5109 #ifdef ENABLE_CLASSIC 5110 5111 // enable will enable SSP during init 5112 void gap_ssp_set_enable(int enable){ 5113 hci_stack->ssp_enable = enable; 5114 } 5115 5116 static int hci_local_ssp_activated(void){ 5117 return gap_ssp_supported() && hci_stack->ssp_enable; 5118 } 5119 5120 // if set, BTstack will respond to io capability request using authentication requirement 5121 void gap_ssp_set_io_capability(int io_capability){ 5122 hci_stack->ssp_io_capability = io_capability; 5123 } 5124 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5125 hci_stack->ssp_authentication_requirement = authentication_requirement; 5126 } 5127 5128 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5129 void gap_ssp_set_auto_accept(int auto_accept){ 5130 hci_stack->ssp_auto_accept = auto_accept; 5131 } 5132 5133 void gap_secure_connections_enable(bool enable){ 5134 hci_stack->secure_connections_enable = enable; 5135 } 5136 5137 #endif 5138 5139 // va_list part of hci_send_cmd 5140 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5141 if (!hci_can_send_command_packet_now()){ 5142 log_error("hci_send_cmd called but cannot send packet now"); 5143 return 0; 5144 } 5145 5146 // for HCI INITIALIZATION 5147 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5148 hci_stack->last_cmd_opcode = cmd->opcode; 5149 5150 hci_reserve_packet_buffer(); 5151 uint8_t * packet = hci_stack->hci_packet_buffer; 5152 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5153 int err = hci_send_cmd_packet(packet, size); 5154 5155 // release packet buffer on error or for synchronous transport implementations 5156 if ((err < 0) || hci_transport_synchronous()){ 5157 hci_release_packet_buffer(); 5158 hci_emit_transport_packet_sent(); 5159 } 5160 5161 return err; 5162 } 5163 5164 /** 5165 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5166 */ 5167 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5168 va_list argptr; 5169 va_start(argptr, cmd); 5170 int res = hci_send_cmd_va_arg(cmd, argptr); 5171 va_end(argptr); 5172 return res; 5173 } 5174 5175 // Create various non-HCI events. 5176 // TODO: generalize, use table similar to hci_create_command 5177 5178 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5179 // dump packet 5180 if (dump) { 5181 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5182 } 5183 5184 // dispatch to all event handlers 5185 btstack_linked_list_iterator_t it; 5186 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5187 while (btstack_linked_list_iterator_has_next(&it)){ 5188 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5189 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5190 } 5191 } 5192 5193 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5194 if (!hci_stack->acl_packet_handler) return; 5195 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5196 } 5197 5198 #ifdef ENABLE_CLASSIC 5199 static void hci_notify_if_sco_can_send_now(void){ 5200 // notify SCO sender if waiting 5201 if (!hci_stack->sco_waiting_for_can_send_now) return; 5202 if (hci_can_send_sco_packet_now()){ 5203 hci_stack->sco_waiting_for_can_send_now = 0; 5204 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5205 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5206 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5207 } 5208 } 5209 5210 // parsing end emitting has been merged to reduce code size 5211 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5212 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5213 5214 uint8_t * eir_data; 5215 ad_context_t context; 5216 const uint8_t * name; 5217 uint8_t name_len; 5218 5219 if (size < 3) return; 5220 5221 int event_type = hci_event_packet_get_type(packet); 5222 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5223 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5224 5225 switch (event_type){ 5226 case HCI_EVENT_INQUIRY_RESULT: 5227 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5228 if (size != (3 + (num_responses * 14))) return; 5229 break; 5230 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5231 if (size != 257) return; 5232 if (num_responses != 1) return; 5233 break; 5234 default: 5235 return; 5236 } 5237 5238 // event[1] is set at the end 5239 int i; 5240 for (i=0; i<num_responses;i++){ 5241 memset(event, 0, sizeof(event)); 5242 event[0] = GAP_EVENT_INQUIRY_RESULT; 5243 uint8_t event_size = 18; // if name is not set by EIR 5244 5245 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5246 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5247 (void)memcpy(&event[9], 5248 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5249 3); // class of device 5250 (void)memcpy(&event[12], 5251 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5252 2); // clock offset 5253 5254 switch (event_type){ 5255 case HCI_EVENT_INQUIRY_RESULT: 5256 // 14,15,16,17 = 0, size 18 5257 break; 5258 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5259 event[14] = 1; 5260 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5261 // 16,17 = 0, size 18 5262 break; 5263 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5264 event[14] = 1; 5265 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5266 // EIR packets only contain a single inquiry response 5267 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5268 name = NULL; 5269 // Iterate over EIR data 5270 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5271 uint8_t data_type = ad_iterator_get_data_type(&context); 5272 uint8_t data_size = ad_iterator_get_data_len(&context); 5273 const uint8_t * data = ad_iterator_get_data(&context); 5274 // Prefer Complete Local Name over Shortened Local Name 5275 switch (data_type){ 5276 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5277 if (name) continue; 5278 /* fall through */ 5279 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5280 name = data; 5281 name_len = data_size; 5282 break; 5283 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5284 if (data_size != 8) break; 5285 event[16] = 1; 5286 memcpy(&event[17], data, 8); 5287 break; 5288 default: 5289 break; 5290 } 5291 } 5292 if (name){ 5293 event[25] = 1; 5294 // truncate name if needed 5295 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5296 event[26] = len; 5297 (void)memcpy(&event[27], name, len); 5298 event_size += len; 5299 } 5300 break; 5301 default: 5302 return; 5303 } 5304 event[1] = event_size - 2; 5305 hci_emit_event(event, event_size, 1); 5306 } 5307 } 5308 #endif 5309 5310 void hci_emit_state(void){ 5311 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5312 uint8_t event[3]; 5313 event[0] = BTSTACK_EVENT_STATE; 5314 event[1] = sizeof(event) - 2u; 5315 event[2] = hci_stack->state; 5316 hci_emit_event(event, sizeof(event), 1); 5317 } 5318 5319 #ifdef ENABLE_CLASSIC 5320 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5321 uint8_t event[13]; 5322 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5323 event[1] = sizeof(event) - 2; 5324 event[2] = status; 5325 little_endian_store_16(event, 3, con_handle); 5326 reverse_bd_addr(address, &event[5]); 5327 event[11] = 1; // ACL connection 5328 event[12] = 0; // encryption disabled 5329 hci_emit_event(event, sizeof(event), 1); 5330 } 5331 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5332 if (disable_l2cap_timeouts) return; 5333 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5334 uint8_t event[4]; 5335 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5336 event[1] = sizeof(event) - 2; 5337 little_endian_store_16(event, 2, conn->con_handle); 5338 hci_emit_event(event, sizeof(event), 1); 5339 } 5340 #endif 5341 5342 #ifdef ENABLE_BLE 5343 #ifdef ENABLE_LE_CENTRAL 5344 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){ 5345 uint8_t event[21]; 5346 event[0] = HCI_EVENT_LE_META; 5347 event[1] = sizeof(event) - 2u; 5348 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5349 event[3] = status; 5350 little_endian_store_16(event, 4, con_handle); 5351 event[6] = 0; // TODO: role 5352 event[7] = address_type; 5353 reverse_bd_addr(address, &event[8]); 5354 little_endian_store_16(event, 14, 0); // interval 5355 little_endian_store_16(event, 16, 0); // latency 5356 little_endian_store_16(event, 18, 0); // supervision timeout 5357 event[20] = 0; // master clock accuracy 5358 hci_emit_event(event, sizeof(event), 1); 5359 } 5360 #endif 5361 #endif 5362 5363 static void hci_emit_transport_packet_sent(void){ 5364 // notify upper stack that it might be possible to send again 5365 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5366 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5367 } 5368 5369 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5370 uint8_t event[6]; 5371 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5372 event[1] = sizeof(event) - 2u; 5373 event[2] = 0; // status = OK 5374 little_endian_store_16(event, 3, con_handle); 5375 event[5] = reason; 5376 hci_emit_event(event, sizeof(event), 1); 5377 } 5378 5379 static void hci_emit_nr_connections_changed(void){ 5380 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5381 uint8_t event[3]; 5382 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5383 event[1] = sizeof(event) - 2u; 5384 event[2] = nr_hci_connections(); 5385 hci_emit_event(event, sizeof(event), 1); 5386 } 5387 5388 static void hci_emit_hci_open_failed(void){ 5389 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5390 uint8_t event[2]; 5391 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5392 event[1] = sizeof(event) - 2u; 5393 hci_emit_event(event, sizeof(event), 1); 5394 } 5395 5396 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5397 log_info("hci_emit_dedicated_bonding_result %u ", status); 5398 uint8_t event[9]; 5399 int pos = 0; 5400 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5401 event[pos++] = sizeof(event) - 2u; 5402 event[pos++] = status; 5403 reverse_bd_addr(address, &event[pos]); 5404 hci_emit_event(event, sizeof(event), 1); 5405 } 5406 5407 5408 #ifdef ENABLE_CLASSIC 5409 5410 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5411 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5412 uint8_t event[5]; 5413 int pos = 0; 5414 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5415 event[pos++] = sizeof(event) - 2; 5416 little_endian_store_16(event, 2, con_handle); 5417 pos += 2; 5418 event[pos++] = level; 5419 hci_emit_event(event, sizeof(event), 1); 5420 } 5421 5422 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5423 if (!connection) return LEVEL_0; 5424 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5425 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5426 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5427 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5428 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5429 // LEVEL 4 always requires 128 bit encrytion key size 5430 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5431 security_level = LEVEL_3; 5432 } 5433 return security_level; 5434 } 5435 5436 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5437 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5438 uint8_t event[3]; 5439 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5440 event[1] = sizeof(event) - 2; 5441 event[2] = enabled; 5442 hci_emit_event(event, sizeof(event), 1); 5443 } 5444 5445 // query if remote side supports eSCO 5446 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5447 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5448 if (!connection) return 0; 5449 return (connection->remote_supported_features[0] & 1) != 0; 5450 } 5451 5452 static bool hci_ssp_supported(hci_connection_t * connection){ 5453 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5454 return (connection->bonding_flags & mask) == mask; 5455 } 5456 5457 // query if remote side supports SSP 5458 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5459 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5460 if (!connection) return 0; 5461 return hci_ssp_supported(connection) ? 1 : 0; 5462 } 5463 5464 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5465 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5466 } 5467 5468 // GAP API 5469 /** 5470 * @bbrief enable/disable bonding. default is enabled 5471 * @praram enabled 5472 */ 5473 void gap_set_bondable_mode(int enable){ 5474 hci_stack->bondable = enable ? 1 : 0; 5475 } 5476 /** 5477 * @brief Get bondable mode. 5478 * @return 1 if bondable 5479 */ 5480 int gap_get_bondable_mode(void){ 5481 return hci_stack->bondable; 5482 } 5483 5484 /** 5485 * @brief map link keys to security levels 5486 */ 5487 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5488 switch (link_key_type){ 5489 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5490 return LEVEL_4; 5491 case COMBINATION_KEY: 5492 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5493 return LEVEL_3; 5494 default: 5495 return LEVEL_2; 5496 } 5497 } 5498 5499 /** 5500 * @brief map link keys to secure connection yes/no 5501 */ 5502 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5503 switch (link_key_type){ 5504 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5505 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5506 return 1; 5507 default: 5508 return 0; 5509 } 5510 } 5511 5512 /** 5513 * @brief map link keys to authenticated 5514 */ 5515 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5516 switch (link_key_type){ 5517 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5518 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5519 return 1; 5520 default: 5521 return 0; 5522 } 5523 } 5524 5525 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5526 log_info("gap_mitm_protection_required_for_security_level %u", level); 5527 return level > LEVEL_2; 5528 } 5529 5530 /** 5531 * @brief get current security level 5532 */ 5533 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5534 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5535 if (!connection) return LEVEL_0; 5536 return gap_security_level_for_connection(connection); 5537 } 5538 5539 /** 5540 * @brief request connection to device to 5541 * @result GAP_AUTHENTICATION_RESULT 5542 */ 5543 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5544 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5545 if (!connection){ 5546 hci_emit_security_level(con_handle, LEVEL_0); 5547 return; 5548 } 5549 5550 btstack_assert(hci_is_le_connection(connection) == false); 5551 5552 // 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) 5553 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5554 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5555 requested_level = LEVEL_4; 5556 } 5557 5558 gap_security_level_t current_level = gap_security_level(con_handle); 5559 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5560 requested_level, connection->requested_security_level, current_level); 5561 5562 // authentication active if authentication request was sent or planned level > 0 5563 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5564 if (authentication_active){ 5565 // authentication already active 5566 if (connection->requested_security_level < requested_level){ 5567 // increase requested level as new level is higher 5568 // TODO: handle re-authentication when done 5569 connection->requested_security_level = requested_level; 5570 } 5571 } else { 5572 // no request active, notify if security sufficient 5573 if (requested_level <= current_level){ 5574 hci_emit_security_level(con_handle, current_level); 5575 return; 5576 } 5577 5578 // store request 5579 connection->requested_security_level = requested_level; 5580 5581 // start to authenticate connection 5582 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5583 hci_run(); 5584 } 5585 } 5586 5587 /** 5588 * @brief start dedicated bonding with device. disconnect after bonding 5589 * @param device 5590 * @param request MITM protection 5591 * @result GAP_DEDICATED_BONDING_COMPLETE 5592 */ 5593 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5594 5595 // create connection state machine 5596 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5597 5598 if (!connection){ 5599 return BTSTACK_MEMORY_ALLOC_FAILED; 5600 } 5601 5602 // delete linkn key 5603 gap_drop_link_key_for_bd_addr(device); 5604 5605 // configure LEVEL_2/3, dedicated bonding 5606 connection->state = SEND_CREATE_CONNECTION; 5607 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5608 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5609 connection->bonding_flags = BONDING_DEDICATED; 5610 5611 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5612 5613 // handle: connnection failure (connection complete != ok) 5614 // handle: authentication failure 5615 // handle: disconnect on done 5616 5617 hci_run(); 5618 5619 return 0; 5620 } 5621 #endif 5622 5623 void gap_set_local_name(const char * local_name){ 5624 hci_stack->local_name = local_name; 5625 } 5626 5627 5628 #ifdef ENABLE_BLE 5629 5630 #ifdef ENABLE_LE_CENTRAL 5631 void gap_start_scan(void){ 5632 hci_stack->le_scanning_enabled = true; 5633 hci_run(); 5634 } 5635 5636 void gap_stop_scan(void){ 5637 hci_stack->le_scanning_enabled = false; 5638 hci_run(); 5639 } 5640 5641 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5642 hci_stack->le_scan_type = scan_type; 5643 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5644 hci_stack->le_scan_interval = scan_interval; 5645 hci_stack->le_scan_window = scan_window; 5646 hci_stack->le_scanning_param_update = true; 5647 hci_run(); 5648 } 5649 5650 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5651 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5652 } 5653 5654 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5655 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5656 if (!conn){ 5657 // disallow if le connection is already outgoing 5658 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5659 log_error("le connection already active"); 5660 return ERROR_CODE_COMMAND_DISALLOWED; 5661 } 5662 5663 log_info("gap_connect: no connection exists yet, creating context"); 5664 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5665 if (!conn){ 5666 // notify client that alloc failed 5667 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5668 log_info("gap_connect: failed to alloc hci_connection_t"); 5669 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5670 } 5671 5672 // set le connecting state 5673 if (hci_is_le_connection_type(addr_type)){ 5674 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5675 } 5676 5677 conn->state = SEND_CREATE_CONNECTION; 5678 log_info("gap_connect: send create connection next"); 5679 hci_run(); 5680 return ERROR_CODE_SUCCESS; 5681 } 5682 5683 if (!hci_is_le_connection(conn) || 5684 (conn->state == SEND_CREATE_CONNECTION) || 5685 (conn->state == SENT_CREATE_CONNECTION)) { 5686 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5687 log_error("gap_connect: classic connection or connect is already being created"); 5688 return GATT_CLIENT_IN_WRONG_STATE; 5689 } 5690 5691 // check if connection was just disconnected 5692 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5693 log_info("gap_connect: send create connection (again)"); 5694 conn->state = SEND_CREATE_CONNECTION; 5695 hci_run(); 5696 return ERROR_CODE_SUCCESS; 5697 } 5698 5699 log_info("gap_connect: context exists with state %u", conn->state); 5700 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5701 hci_run(); 5702 return ERROR_CODE_SUCCESS; 5703 } 5704 5705 // @assumption: only a single outgoing LE Connection exists 5706 static hci_connection_t * gap_get_outgoing_connection(void){ 5707 btstack_linked_item_t *it; 5708 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5709 hci_connection_t * conn = (hci_connection_t *) it; 5710 if (!hci_is_le_connection(conn)) continue; 5711 switch (conn->state){ 5712 case SEND_CREATE_CONNECTION: 5713 case SENT_CREATE_CONNECTION: 5714 case SENT_CANCEL_CONNECTION: 5715 return conn; 5716 default: 5717 break; 5718 }; 5719 } 5720 return NULL; 5721 } 5722 5723 uint8_t gap_connect_cancel(void){ 5724 hci_connection_t * conn = gap_get_outgoing_connection(); 5725 if (!conn) return 0; 5726 switch (conn->state){ 5727 case SEND_CREATE_CONNECTION: 5728 // skip sending create connection and emit event instead 5729 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5730 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5731 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5732 btstack_memory_hci_connection_free( conn ); 5733 break; 5734 case SENT_CREATE_CONNECTION: 5735 // request to send cancel connection 5736 conn->state = SEND_CANCEL_CONNECTION; 5737 hci_run(); 5738 break; 5739 default: 5740 break; 5741 } 5742 return 0; 5743 } 5744 #endif 5745 5746 #ifdef ENABLE_LE_CENTRAL 5747 /** 5748 * @brief Set connection parameters for outgoing connections 5749 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5750 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5751 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5752 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5753 * @param conn_latency, default: 4 5754 * @param supervision_timeout (unit: 10ms), default: 720 ms 5755 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5756 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5757 */ 5758 5759 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5760 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5761 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5762 hci_stack->le_connection_scan_interval = conn_scan_interval; 5763 hci_stack->le_connection_scan_window = conn_scan_window; 5764 hci_stack->le_connection_interval_min = conn_interval_min; 5765 hci_stack->le_connection_interval_max = conn_interval_max; 5766 hci_stack->le_connection_latency = conn_latency; 5767 hci_stack->le_supervision_timeout = supervision_timeout; 5768 hci_stack->le_minimum_ce_length = min_ce_length; 5769 hci_stack->le_maximum_ce_length = max_ce_length; 5770 } 5771 #endif 5772 5773 /** 5774 * @brief Updates the connection parameters for a given LE connection 5775 * @param handle 5776 * @param conn_interval_min (unit: 1.25ms) 5777 * @param conn_interval_max (unit: 1.25ms) 5778 * @param conn_latency 5779 * @param supervision_timeout (unit: 10ms) 5780 * @returns 0 if ok 5781 */ 5782 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5783 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5784 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5785 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5786 connection->le_conn_interval_min = conn_interval_min; 5787 connection->le_conn_interval_max = conn_interval_max; 5788 connection->le_conn_latency = conn_latency; 5789 connection->le_supervision_timeout = supervision_timeout; 5790 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5791 hci_run(); 5792 return 0; 5793 } 5794 5795 /** 5796 * @brief Request an update of the connection parameter for a given LE connection 5797 * @param handle 5798 * @param conn_interval_min (unit: 1.25ms) 5799 * @param conn_interval_max (unit: 1.25ms) 5800 * @param conn_latency 5801 * @param supervision_timeout (unit: 10ms) 5802 * @returns 0 if ok 5803 */ 5804 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5805 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5806 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5807 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5808 connection->le_conn_interval_min = conn_interval_min; 5809 connection->le_conn_interval_max = conn_interval_max; 5810 connection->le_conn_latency = conn_latency; 5811 connection->le_supervision_timeout = supervision_timeout; 5812 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5813 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5814 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5815 return 0; 5816 } 5817 5818 #ifdef ENABLE_LE_PERIPHERAL 5819 5820 /** 5821 * @brief Set Advertisement Data 5822 * @param advertising_data_length 5823 * @param advertising_data (max 31 octets) 5824 * @note data is not copied, pointer has to stay valid 5825 */ 5826 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5827 hci_stack->le_advertisements_data_len = advertising_data_length; 5828 hci_stack->le_advertisements_data = advertising_data; 5829 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5830 hci_run(); 5831 } 5832 5833 /** 5834 * @brief Set Scan Response Data 5835 * @param advertising_data_length 5836 * @param advertising_data (max 31 octets) 5837 * @note data is not copied, pointer has to stay valid 5838 */ 5839 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5840 hci_stack->le_scan_response_data_len = scan_response_data_length; 5841 hci_stack->le_scan_response_data = scan_response_data; 5842 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5843 hci_run(); 5844 } 5845 5846 /** 5847 * @brief Set Advertisement Parameters 5848 * @param adv_int_min 5849 * @param adv_int_max 5850 * @param adv_type 5851 * @param direct_address_type 5852 * @param direct_address 5853 * @param channel_map 5854 * @param filter_policy 5855 * 5856 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5857 */ 5858 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5859 uint8_t direct_address_typ, bd_addr_t direct_address, 5860 uint8_t channel_map, uint8_t filter_policy) { 5861 5862 hci_stack->le_advertisements_interval_min = adv_int_min; 5863 hci_stack->le_advertisements_interval_max = adv_int_max; 5864 hci_stack->le_advertisements_type = adv_type; 5865 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5866 hci_stack->le_advertisements_channel_map = channel_map; 5867 hci_stack->le_advertisements_filter_policy = filter_policy; 5868 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5869 6); 5870 5871 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5872 hci_run(); 5873 } 5874 5875 /** 5876 * @brief Enable/Disable Advertisements 5877 * @param enabled 5878 */ 5879 void gap_advertisements_enable(int enabled){ 5880 hci_stack->le_advertisements_enabled = enabled != 0; 5881 hci_update_advertisements_enabled_for_current_roles(); 5882 hci_run(); 5883 } 5884 5885 #endif 5886 5887 void hci_le_set_own_address_type(uint8_t own_address_type){ 5888 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5889 if (own_address_type == hci_stack->le_own_addr_type) return; 5890 hci_stack->le_own_addr_type = own_address_type; 5891 5892 #ifdef ENABLE_LE_PERIPHERAL 5893 // update advertisement parameters, too 5894 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5895 hci_run(); 5896 #endif 5897 #ifdef ENABLE_LE_CENTRAL 5898 // note: we don't update scan parameters or modify ongoing connection attempts 5899 #endif 5900 } 5901 5902 #endif 5903 5904 uint8_t gap_disconnect(hci_con_handle_t handle){ 5905 hci_connection_t * conn = hci_connection_for_handle(handle); 5906 if (!conn){ 5907 hci_emit_disconnection_complete(handle, 0); 5908 return 0; 5909 } 5910 // ignore if already disconnected 5911 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5912 return 0; 5913 } 5914 conn->state = SEND_DISCONNECT; 5915 hci_run(); 5916 return 0; 5917 } 5918 5919 int gap_read_rssi(hci_con_handle_t con_handle){ 5920 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5921 if (hci_connection == NULL) return 0; 5922 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5923 hci_run(); 5924 return 1; 5925 } 5926 5927 /** 5928 * @brief Get connection type 5929 * @param con_handle 5930 * @result connection_type 5931 */ 5932 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5933 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5934 if (!conn) return GAP_CONNECTION_INVALID; 5935 switch (conn->address_type){ 5936 case BD_ADDR_TYPE_LE_PUBLIC: 5937 case BD_ADDR_TYPE_LE_RANDOM: 5938 return GAP_CONNECTION_LE; 5939 case BD_ADDR_TYPE_SCO: 5940 return GAP_CONNECTION_SCO; 5941 case BD_ADDR_TYPE_ACL: 5942 return GAP_CONNECTION_ACL; 5943 default: 5944 return GAP_CONNECTION_INVALID; 5945 } 5946 } 5947 5948 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5949 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5950 if (!conn) return HCI_ROLE_INVALID; 5951 return (hci_role_t) conn->role; 5952 } 5953 5954 5955 #ifdef ENABLE_CLASSIC 5956 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5957 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5958 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5959 conn->request_role = role; 5960 hci_run(); 5961 return ERROR_CODE_SUCCESS; 5962 } 5963 #endif 5964 5965 #ifdef ENABLE_BLE 5966 5967 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){ 5968 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5969 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5970 5971 conn->le_phy_update_all_phys = all_phys; 5972 conn->le_phy_update_tx_phys = tx_phys; 5973 conn->le_phy_update_rx_phys = rx_phys; 5974 conn->le_phy_update_phy_options = phy_options; 5975 5976 hci_run(); 5977 5978 return 0; 5979 } 5980 5981 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5982 // check if already in list 5983 btstack_linked_list_iterator_t it; 5984 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5985 while (btstack_linked_list_iterator_has_next(&it)) { 5986 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5987 if (entry->address_type != address_type) { 5988 continue; 5989 } 5990 if (memcmp(entry->address, address, 6) != 0) { 5991 continue; 5992 } 5993 // disallow if already scheduled to add 5994 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5995 return ERROR_CODE_COMMAND_DISALLOWED; 5996 } 5997 // still on controller, but scheduled to remove -> re-add 5998 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5999 return ERROR_CODE_SUCCESS; 6000 } 6001 // alloc and add to list 6002 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6003 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6004 entry->address_type = address_type; 6005 (void)memcpy(entry->address, address, 6); 6006 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6007 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6008 return ERROR_CODE_SUCCESS; 6009 } 6010 6011 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6012 btstack_linked_list_iterator_t it; 6013 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6014 while (btstack_linked_list_iterator_has_next(&it)){ 6015 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6016 if (entry->address_type != address_type) { 6017 continue; 6018 } 6019 if (memcmp(entry->address, address, 6) != 0) { 6020 continue; 6021 } 6022 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6023 // remove from controller if already present 6024 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6025 } else { 6026 // directly remove entry from whitelist 6027 btstack_linked_list_iterator_remove(&it); 6028 btstack_memory_whitelist_entry_free(entry); 6029 } 6030 return ERROR_CODE_SUCCESS; 6031 } 6032 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6033 } 6034 6035 static void hci_whitelist_clear(void){ 6036 btstack_linked_list_iterator_t it; 6037 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6038 while (btstack_linked_list_iterator_has_next(&it)){ 6039 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6040 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6041 // remove from controller if already present 6042 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6043 continue; 6044 } 6045 // directly remove entry from whitelist 6046 btstack_linked_list_iterator_remove(&it); 6047 btstack_memory_whitelist_entry_free(entry); 6048 } 6049 } 6050 6051 /** 6052 * @brief Clear Whitelist 6053 * @returns 0 if ok 6054 */ 6055 uint8_t gap_whitelist_clear(void){ 6056 hci_whitelist_clear(); 6057 hci_run(); 6058 return ERROR_CODE_SUCCESS; 6059 } 6060 6061 /** 6062 * @brief Add Device to Whitelist 6063 * @param address_typ 6064 * @param address 6065 * @returns 0 if ok 6066 */ 6067 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6068 uint8_t status = hci_whitelist_add(address_type, address); 6069 if (status){ 6070 return status; 6071 } 6072 hci_run(); 6073 return ERROR_CODE_SUCCESS; 6074 } 6075 6076 /** 6077 * @brief Remove Device from Whitelist 6078 * @param address_typ 6079 * @param address 6080 * @returns 0 if ok 6081 */ 6082 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6083 uint8_t status = hci_whitelist_remove(address_type, address); 6084 if (status){ 6085 return status; 6086 } 6087 hci_run(); 6088 return ERROR_CODE_SUCCESS; 6089 } 6090 6091 #ifdef ENABLE_LE_CENTRAL 6092 /** 6093 * @brief Connect with Whitelist 6094 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6095 * @returns - if ok 6096 */ 6097 uint8_t gap_connect_with_whitelist(void){ 6098 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6099 return ERROR_CODE_COMMAND_DISALLOWED; 6100 } 6101 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6102 hci_run(); 6103 return ERROR_CODE_SUCCESS; 6104 } 6105 6106 /** 6107 * @brief Auto Connection Establishment - Start Connecting to device 6108 * @param address_typ 6109 * @param address 6110 * @returns 0 if ok 6111 */ 6112 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6113 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6114 return ERROR_CODE_COMMAND_DISALLOWED; 6115 } 6116 6117 uint8_t status = hci_whitelist_add(address_type, address); 6118 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6119 return status; 6120 } 6121 6122 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6123 6124 hci_run(); 6125 return ERROR_CODE_SUCCESS; 6126 } 6127 6128 /** 6129 * @brief Auto Connection Establishment - Stop Connecting to device 6130 * @param address_typ 6131 * @param address 6132 * @returns 0 if ok 6133 */ 6134 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6135 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6136 return ERROR_CODE_COMMAND_DISALLOWED; 6137 } 6138 6139 hci_whitelist_remove(address_type, address); 6140 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6141 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6142 } 6143 hci_run(); 6144 return 0; 6145 } 6146 6147 /** 6148 * @brief Auto Connection Establishment - Stop everything 6149 * @note Convenience function to stop all active auto connection attempts 6150 */ 6151 uint8_t gap_auto_connection_stop_all(void){ 6152 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6153 return ERROR_CODE_COMMAND_DISALLOWED; 6154 } 6155 hci_whitelist_clear(); 6156 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6157 hci_run(); 6158 return ERROR_CODE_SUCCESS; 6159 } 6160 6161 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6162 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6163 if (!conn) return 0; 6164 return conn->le_connection_interval; 6165 } 6166 #endif 6167 #endif 6168 6169 #ifdef ENABLE_CLASSIC 6170 /** 6171 * @brief Set Extended Inquiry Response data 6172 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6173 * @note has to be done before stack starts up 6174 */ 6175 void gap_set_extended_inquiry_response(const uint8_t * data){ 6176 hci_stack->eir_data = data; 6177 } 6178 6179 /** 6180 * @brief Start GAP Classic Inquiry 6181 * @param duration in 1.28s units 6182 * @return 0 if ok 6183 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6184 */ 6185 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6186 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6187 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6188 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6189 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6190 } 6191 hci_stack->inquiry_state = duration_in_1280ms_units; 6192 hci_run(); 6193 return 0; 6194 } 6195 6196 /** 6197 * @brief Stop GAP Classic Inquiry 6198 * @returns 0 if ok 6199 */ 6200 int gap_inquiry_stop(void){ 6201 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6202 // emit inquiry complete event, before it even started 6203 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6204 hci_emit_event(event, sizeof(event), 1); 6205 return 0; 6206 } 6207 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6208 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6209 hci_run(); 6210 return 0; 6211 } 6212 6213 void gap_inquiry_set_lap(uint32_t lap){ 6214 hci_stack->inquiry_lap = lap; 6215 } 6216 6217 6218 /** 6219 * @brief Remote Name Request 6220 * @param addr 6221 * @param page_scan_repetition_mode 6222 * @param clock_offset only used when bit 15 is set 6223 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6224 */ 6225 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6226 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6227 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6228 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6229 hci_stack->remote_name_clock_offset = clock_offset; 6230 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6231 hci_run(); 6232 return 0; 6233 } 6234 6235 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6236 hci_stack->gap_pairing_state = state; 6237 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6238 hci_run(); 6239 return 0; 6240 } 6241 6242 /** 6243 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6244 * @param addr 6245 * @param pin_data 6246 * @param pin_len 6247 * @return 0 if ok 6248 */ 6249 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6250 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6251 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6252 hci_stack->gap_pairing_pin_len = pin_len; 6253 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6254 } 6255 6256 /** 6257 * @brief Legacy Pairing Pin Code Response 6258 * @param addr 6259 * @param pin 6260 * @return 0 if ok 6261 */ 6262 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6263 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6264 } 6265 6266 /** 6267 * @brief Abort Legacy Pairing 6268 * @param addr 6269 * @param pin 6270 * @return 0 if ok 6271 */ 6272 int gap_pin_code_negative(bd_addr_t addr){ 6273 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6274 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6275 } 6276 6277 /** 6278 * @brief SSP Passkey Response 6279 * @param addr 6280 * @param passkey 6281 * @return 0 if ok 6282 */ 6283 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6284 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6285 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6286 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6287 } 6288 6289 /** 6290 * @brief Abort SSP Passkey Entry/Pairing 6291 * @param addr 6292 * @param pin 6293 * @return 0 if ok 6294 */ 6295 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6296 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6297 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6298 } 6299 6300 /** 6301 * @brief Accept SSP Numeric Comparison 6302 * @param addr 6303 * @param passkey 6304 * @return 0 if ok 6305 */ 6306 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6307 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6308 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6309 } 6310 6311 /** 6312 * @brief Abort SSP Numeric Comparison/Pairing 6313 * @param addr 6314 * @param pin 6315 * @return 0 if ok 6316 */ 6317 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6318 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6319 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6320 } 6321 6322 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6323 6324 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6325 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6326 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6327 connectionSetAuthenticationFlags(conn, flag); 6328 hci_run(); 6329 return ERROR_CODE_SUCCESS; 6330 } 6331 6332 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6333 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6334 } 6335 6336 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6337 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6338 } 6339 #endif 6340 6341 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6342 /** 6343 * @brief Report Remote OOB Data 6344 * @param bd_addr 6345 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6346 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6347 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6348 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6349 */ 6350 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){ 6351 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6352 if (connection == NULL) { 6353 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6354 } 6355 connection->classic_oob_c_192 = c_192; 6356 connection->classic_oob_r_192 = r_192; 6357 connection->classic_oob_c_256 = c_256; 6358 connection->classic_oob_r_256 = r_256; 6359 return ERROR_CODE_SUCCESS; 6360 } 6361 /** 6362 * @brief Generate new OOB data 6363 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6364 */ 6365 void gap_ssp_generate_oob_data(void){ 6366 hci_stack->classic_read_local_oob_data = true; 6367 hci_run(); 6368 } 6369 6370 #endif 6371 6372 /** 6373 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6374 * @param inquiry_mode see bluetooth_defines.h 6375 */ 6376 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6377 hci_stack->inquiry_mode = inquiry_mode; 6378 } 6379 6380 /** 6381 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6382 */ 6383 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6384 hci_stack->sco_voice_setting = voice_setting; 6385 } 6386 6387 /** 6388 * @brief Get SCO Voice Setting 6389 * @return current voice setting 6390 */ 6391 uint16_t hci_get_sco_voice_setting(void){ 6392 return hci_stack->sco_voice_setting; 6393 } 6394 6395 static int hci_have_usb_transport(void){ 6396 if (!hci_stack->hci_transport) return 0; 6397 const char * transport_name = hci_stack->hci_transport->name; 6398 if (!transport_name) return 0; 6399 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6400 } 6401 6402 /** @brief Get SCO packet length for current SCO Voice setting 6403 * @note Using SCO packets of the exact length is required for USB transfer 6404 * @return Length of SCO packets in bytes (not audio frames) 6405 */ 6406 int hci_get_sco_packet_length(void){ 6407 int sco_packet_length = 0; 6408 6409 #ifdef ENABLE_SCO_OVER_HCI 6410 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6411 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6412 6413 if (hci_have_usb_transport()){ 6414 // see Core Spec for H2 USB Transfer. 6415 // 3 byte SCO header + 24 bytes per connection 6416 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6417 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6418 } else { 6419 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6420 sco_packet_length = 3 + 60 * multiplier; 6421 // assert that it still fits inside an SCO buffer 6422 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6423 sco_packet_length = 3 + 60; 6424 } 6425 } 6426 #endif 6427 6428 #ifdef HAVE_SCO_TRANSPORT 6429 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6430 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6431 sco_packet_length = 3 + 60 * multiplier; 6432 #endif 6433 return sco_packet_length; 6434 } 6435 6436 /** 6437 * @brief Sets the master/slave policy 6438 * @param policy (0: attempt to become master, 1: let connecting device decide) 6439 */ 6440 void hci_set_master_slave_policy(uint8_t policy){ 6441 hci_stack->master_slave_policy = policy; 6442 } 6443 6444 #endif 6445 6446 HCI_STATE hci_get_state(void){ 6447 return hci_stack->state; 6448 } 6449 6450 #ifdef ENABLE_CLASSIC 6451 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6452 hci_stack->gap_classic_accept_callback = accept_callback; 6453 } 6454 #endif 6455 6456 /** 6457 * @brief Set callback for Bluetooth Hardware Error 6458 */ 6459 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6460 hci_stack->hardware_error_callback = fn; 6461 } 6462 6463 void hci_disconnect_all(void){ 6464 btstack_linked_list_iterator_t it; 6465 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6466 while (btstack_linked_list_iterator_has_next(&it)){ 6467 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6468 if (con->state == SENT_DISCONNECT) continue; 6469 con->state = SEND_DISCONNECT; 6470 } 6471 hci_run(); 6472 } 6473 6474 uint16_t hci_get_manufacturer(void){ 6475 return hci_stack->manufacturer; 6476 } 6477 6478 #ifdef ENABLE_BLE 6479 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6480 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6481 if (!hci_con) return NULL; 6482 return &hci_con->sm_connection; 6483 } 6484 6485 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6486 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6487 #endif 6488 6489 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6490 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6491 if (hci_connection == NULL) return 0; 6492 if (hci_is_le_connection(hci_connection)){ 6493 #ifdef ENABLE_BLE 6494 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6495 if (sm_conn->sm_connection_encrypted) { 6496 return sm_conn->sm_actual_encryption_key_size; 6497 } 6498 #endif 6499 } else { 6500 #ifdef ENABLE_CLASSIC 6501 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6502 return hci_connection->encryption_key_size; 6503 } 6504 #endif 6505 } 6506 return 0; 6507 } 6508 6509 int gap_authenticated(hci_con_handle_t con_handle){ 6510 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6511 if (hci_connection == NULL) return 0; 6512 6513 switch (hci_connection->address_type){ 6514 #ifdef ENABLE_BLE 6515 case BD_ADDR_TYPE_LE_PUBLIC: 6516 case BD_ADDR_TYPE_LE_RANDOM: 6517 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6518 return hci_connection->sm_connection.sm_connection_authenticated; 6519 #endif 6520 #ifdef ENABLE_CLASSIC 6521 case BD_ADDR_TYPE_SCO: 6522 case BD_ADDR_TYPE_ACL: 6523 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6524 #endif 6525 default: 6526 return 0; 6527 } 6528 } 6529 6530 int gap_secure_connection(hci_con_handle_t con_handle){ 6531 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6532 if (hci_connection == NULL) return 0; 6533 6534 switch (hci_connection->address_type){ 6535 #ifdef ENABLE_BLE 6536 case BD_ADDR_TYPE_LE_PUBLIC: 6537 case BD_ADDR_TYPE_LE_RANDOM: 6538 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6539 return hci_connection->sm_connection.sm_connection_sc; 6540 #endif 6541 #ifdef ENABLE_CLASSIC 6542 case BD_ADDR_TYPE_SCO: 6543 case BD_ADDR_TYPE_ACL: 6544 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6545 #endif 6546 default: 6547 return 0; 6548 } 6549 } 6550 6551 bool gap_bonded(hci_con_handle_t con_handle){ 6552 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6553 if (hci_connection == NULL) return 0; 6554 6555 #ifdef ENABLE_CLASSIC 6556 link_key_t link_key; 6557 link_key_type_t link_key_type; 6558 #endif 6559 switch (hci_connection->address_type){ 6560 #ifdef ENABLE_BLE 6561 case BD_ADDR_TYPE_LE_PUBLIC: 6562 case BD_ADDR_TYPE_LE_RANDOM: 6563 return hci_connection->sm_connection.sm_le_db_index >= 0; 6564 #endif 6565 #ifdef ENABLE_CLASSIC 6566 case BD_ADDR_TYPE_SCO: 6567 case BD_ADDR_TYPE_ACL: 6568 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6569 #endif 6570 default: 6571 return false; 6572 } 6573 } 6574 6575 #ifdef ENABLE_BLE 6576 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6577 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6578 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6579 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6580 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6581 return sm_conn->sm_connection_authorization_state; 6582 } 6583 #endif 6584 6585 #ifdef ENABLE_CLASSIC 6586 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){ 6587 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6588 if (!conn) return GAP_CONNECTION_INVALID; 6589 conn->sniff_min_interval = sniff_min_interval; 6590 conn->sniff_max_interval = sniff_max_interval; 6591 conn->sniff_attempt = sniff_attempt; 6592 conn->sniff_timeout = sniff_timeout; 6593 hci_run(); 6594 return 0; 6595 } 6596 6597 /** 6598 * @brief Exit Sniff mode 6599 * @param con_handle 6600 @ @return 0 if ok 6601 */ 6602 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6603 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6604 if (!conn) return GAP_CONNECTION_INVALID; 6605 conn->sniff_min_interval = 0xffff; 6606 hci_run(); 6607 return 0; 6608 } 6609 6610 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){ 6611 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6612 if (!conn) return GAP_CONNECTION_INVALID; 6613 conn->sniff_subrating_max_latency = max_latency; 6614 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6615 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6616 hci_run(); 6617 return ERROR_CODE_SUCCESS; 6618 } 6619 6620 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){ 6621 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6622 if (!conn) return GAP_CONNECTION_INVALID; 6623 conn->qos_service_type = service_type; 6624 conn->qos_token_rate = token_rate; 6625 conn->qos_peak_bandwidth = peak_bandwidth; 6626 conn->qos_latency = latency; 6627 conn->qos_delay_variation = delay_variation; 6628 hci_run(); 6629 return ERROR_CODE_SUCCESS; 6630 } 6631 6632 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6633 hci_stack->new_page_scan_interval = page_scan_interval; 6634 hci_stack->new_page_scan_window = page_scan_window; 6635 hci_run(); 6636 } 6637 6638 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6639 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6640 hci_run(); 6641 } 6642 6643 #endif 6644 6645 void hci_halting_defer(void){ 6646 if (hci_stack->state != HCI_STATE_HALTING) return; 6647 switch (hci_stack->substate){ 6648 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6649 case HCI_HALTING_CLOSE: 6650 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6651 break; 6652 default: 6653 break; 6654 } 6655 } 6656 6657 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6658 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6659 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6660 if (le_device_db_index >= le_device_db_max_count()) return; 6661 uint8_t offset = le_device_db_index >> 3; 6662 uint8_t mask = 1 << (le_device_db_index & 7); 6663 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6664 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6665 // note: go back to remove entries, otherwise, a remove + add will skip the add 6666 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6667 } 6668 } 6669 6670 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6671 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6672 if (le_device_db_index >= le_device_db_max_count()) return; 6673 uint8_t offset = le_device_db_index >> 3; 6674 uint8_t mask = 1 << (le_device_db_index & 7); 6675 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6676 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6677 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6678 } 6679 } 6680 6681 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6682 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6683 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6684 } 6685 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6686 // restart le resolving list update 6687 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6688 } 6689 return ERROR_CODE_SUCCESS; 6690 } 6691 #endif 6692 6693 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6694 void hci_setup_test_connections_fuzz(void){ 6695 hci_connection_t * conn; 6696 6697 // default address: 66:55:44:33:00:01 6698 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6699 6700 // setup Controller info 6701 hci_stack->num_cmd_packets = 255; 6702 hci_stack->acl_packets_total_num = 255; 6703 6704 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6705 addr[5] = 0x01; 6706 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6707 conn->con_handle = addr[5]; 6708 conn->role = HCI_ROLE_SLAVE; 6709 conn->state = RECEIVED_CONNECTION_REQUEST; 6710 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6711 6712 // setup incoming Classic SCO connection with con handle 0x0002 6713 addr[5] = 0x02; 6714 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6715 conn->con_handle = addr[5]; 6716 conn->role = HCI_ROLE_SLAVE; 6717 conn->state = RECEIVED_CONNECTION_REQUEST; 6718 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6719 6720 // setup ready Classic ACL connection with con handle 0x0003 6721 addr[5] = 0x03; 6722 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6723 conn->con_handle = addr[5]; 6724 conn->role = HCI_ROLE_SLAVE; 6725 conn->state = OPEN; 6726 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6727 6728 // setup ready Classic SCO connection with con handle 0x0004 6729 addr[5] = 0x04; 6730 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6731 conn->con_handle = addr[5]; 6732 conn->role = HCI_ROLE_SLAVE; 6733 conn->state = OPEN; 6734 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6735 6736 // setup ready LE ACL connection with con handle 0x005 and public address 6737 addr[5] = 0x05; 6738 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6739 conn->con_handle = addr[5]; 6740 conn->role = HCI_ROLE_SLAVE; 6741 conn->state = OPEN; 6742 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6743 conn->sm_connection.sm_connection_encrypted = 1; 6744 } 6745 6746 void hci_free_connections_fuzz(void){ 6747 btstack_linked_list_iterator_t it; 6748 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6749 while (btstack_linked_list_iterator_has_next(&it)){ 6750 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6751 btstack_linked_list_iterator_remove(&it); 6752 btstack_memory_hci_connection_free(con); 6753 } 6754 } 6755 void hci_simulate_working_fuzz(void){ 6756 hci_init_done(); 6757 hci_stack->num_cmd_packets = 255; 6758 } 6759 #endif 6760