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 #endif 2404 2405 static void event_handler(uint8_t *packet, uint16_t size){ 2406 2407 uint16_t event_length = packet[1]; 2408 2409 // assert packet is complete 2410 if (size != (event_length + 2u)){ 2411 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2412 return; 2413 } 2414 2415 bd_addr_type_t addr_type; 2416 hci_con_handle_t handle; 2417 hci_connection_t * conn; 2418 int i; 2419 int create_connection_cmd; 2420 2421 #ifdef ENABLE_CLASSIC 2422 hci_link_type_t link_type; 2423 bd_addr_t addr; 2424 #endif 2425 2426 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2427 2428 switch (hci_event_packet_get_type(packet)) { 2429 2430 case HCI_EVENT_COMMAND_COMPLETE: 2431 handle_command_complete_event(packet, size); 2432 break; 2433 2434 case HCI_EVENT_COMMAND_STATUS: 2435 // get num cmd packets - limit to 1 to reduce complexity 2436 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2437 2438 // check command status to detected failed outgoing connections 2439 create_connection_cmd = 0; 2440 #ifdef ENABLE_CLASSIC 2441 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2442 create_connection_cmd = 1; 2443 } 2444 #endif 2445 #ifdef ENABLE_LE_CENTRAL 2446 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2447 create_connection_cmd = 1; 2448 } 2449 #endif 2450 if (create_connection_cmd) { 2451 uint8_t status = hci_event_command_status_get_status(packet); 2452 addr_type = hci_stack->outgoing_addr_type; 2453 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2454 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); 2455 2456 // reset outgoing address info 2457 memset(hci_stack->outgoing_addr, 0, 6); 2458 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2459 2460 // on error 2461 if (status != ERROR_CODE_SUCCESS){ 2462 #ifdef ENABLE_LE_CENTRAL 2463 if (hci_is_le_connection_type(addr_type)){ 2464 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2465 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2466 } 2467 #endif 2468 // error => outgoing connection failed 2469 if (conn != NULL){ 2470 hci_handle_connection_failed(conn, status); 2471 } 2472 } 2473 } 2474 2475 #ifdef ENABLE_CLASSIC 2476 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2477 uint8_t status = hci_event_command_status_get_status(packet); 2478 log_info("command status (inquiry), status %x", status); 2479 if (status == ERROR_CODE_SUCCESS) { 2480 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2481 } else { 2482 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2483 } 2484 } 2485 #endif 2486 break; 2487 2488 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2489 if (size < 3) return; 2490 uint16_t num_handles = packet[2]; 2491 if (size != (3u + num_handles * 4u)) return; 2492 uint16_t offset = 3; 2493 for (i=0; i<num_handles;i++){ 2494 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2495 offset += 2u; 2496 uint16_t num_packets = little_endian_read_16(packet, offset); 2497 offset += 2u; 2498 2499 conn = hci_connection_for_handle(handle); 2500 if (!conn){ 2501 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2502 continue; 2503 } 2504 2505 if (conn->num_packets_sent >= num_packets){ 2506 conn->num_packets_sent -= num_packets; 2507 } else { 2508 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2509 conn->num_packets_sent = 0; 2510 } 2511 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2512 2513 #ifdef ENABLE_CLASSIC 2514 // For SCO, we do the can_send_now_check here 2515 hci_notify_if_sco_can_send_now(); 2516 #endif 2517 } 2518 break; 2519 } 2520 2521 #ifdef ENABLE_CLASSIC 2522 case HCI_EVENT_INQUIRY_COMPLETE: 2523 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2524 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2525 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2526 hci_emit_event(event, sizeof(event), 1); 2527 } 2528 break; 2529 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2530 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2531 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2532 } 2533 break; 2534 case HCI_EVENT_CONNECTION_REQUEST: 2535 reverse_bd_addr(&packet[2], addr); 2536 link_type = (hci_link_type_t) packet[11]; 2537 2538 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2539 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2540 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2541 bd_addr_copy(hci_stack->decline_addr, addr); 2542 break; 2543 } 2544 2545 if (hci_stack->gap_classic_accept_callback != NULL){ 2546 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2547 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2548 bd_addr_copy(hci_stack->decline_addr, addr); 2549 break; 2550 } 2551 } 2552 2553 // TODO: eval COD 8-10 2554 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2555 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2556 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2557 if (!conn) { 2558 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2559 } 2560 if (!conn) { 2561 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2562 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2563 bd_addr_copy(hci_stack->decline_addr, addr); 2564 break; 2565 } 2566 conn->role = HCI_ROLE_SLAVE; 2567 conn->state = RECEIVED_CONNECTION_REQUEST; 2568 // store info about eSCO 2569 if (link_type == HCI_LINK_TYPE_ESCO){ 2570 conn->remote_supported_features[0] |= 1; 2571 } 2572 hci_run(); 2573 break; 2574 2575 case HCI_EVENT_CONNECTION_COMPLETE: 2576 // Connection management 2577 reverse_bd_addr(&packet[5], addr); 2578 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2579 addr_type = BD_ADDR_TYPE_ACL; 2580 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2581 if (conn) { 2582 if (!packet[2]){ 2583 conn->state = OPEN; 2584 conn->con_handle = little_endian_read_16(packet, 3); 2585 2586 // queue get remote feature 2587 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2588 2589 // queue set supervision timeout if we're master 2590 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2591 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2592 } 2593 2594 // restart timer 2595 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2596 btstack_run_loop_add_timer(&conn->timeout); 2597 2598 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2599 2600 hci_emit_nr_connections_changed(); 2601 } else { 2602 // connection failed 2603 hci_handle_connection_failed(conn, packet[2]); 2604 } 2605 } 2606 break; 2607 2608 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2609 reverse_bd_addr(&packet[5], addr); 2610 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2611 if (packet[2]){ 2612 // connection failed 2613 break; 2614 } 2615 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2616 if (!conn) { 2617 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2618 } 2619 if (!conn) { 2620 break; 2621 } 2622 conn->state = OPEN; 2623 conn->con_handle = little_endian_read_16(packet, 3); 2624 2625 #ifdef ENABLE_SCO_OVER_HCI 2626 // update SCO 2627 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2628 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2629 } 2630 // trigger can send now 2631 if (hci_have_usb_transport()){ 2632 hci_stack->sco_can_send_now = 1; 2633 } 2634 #endif 2635 #ifdef HAVE_SCO_TRANSPORT 2636 // configure sco transport 2637 if (hci_stack->sco_transport != NULL){ 2638 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2639 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2640 } 2641 #endif 2642 break; 2643 2644 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2645 handle = little_endian_read_16(packet, 3); 2646 conn = hci_connection_for_handle(handle); 2647 if (!conn) break; 2648 if (!packet[2]){ 2649 const uint8_t * features = &packet[5]; 2650 hci_handle_remote_features_page_0(conn, features); 2651 2652 // read extended features if possible 2653 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2654 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2655 break; 2656 } 2657 } 2658 hci_handle_remote_features_received(conn); 2659 break; 2660 2661 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2662 handle = little_endian_read_16(packet, 3); 2663 conn = hci_connection_for_handle(handle); 2664 if (!conn) break; 2665 // status = ok, page = 1 2666 if (!packet[2]) { 2667 uint8_t page_number = packet[5]; 2668 uint8_t maximum_page_number = packet[6]; 2669 const uint8_t * features = &packet[7]; 2670 bool done = false; 2671 switch (page_number){ 2672 case 1: 2673 hci_handle_remote_features_page_1(conn, features); 2674 if (maximum_page_number >= 2){ 2675 // get Secure Connections (Controller) from Page 2 if available 2676 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2677 } else { 2678 // otherwise, assume SC (Controller) == SC (Host) 2679 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2680 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2681 } 2682 done = true; 2683 } 2684 break; 2685 case 2: 2686 hci_handle_remote_features_page_2(conn, features); 2687 done = true; 2688 break; 2689 default: 2690 break; 2691 } 2692 if (!done) break; 2693 } 2694 hci_handle_remote_features_received(conn); 2695 break; 2696 2697 case HCI_EVENT_LINK_KEY_REQUEST: 2698 // request handled by hci_run() 2699 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2700 break; 2701 2702 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2703 hci_event_link_key_request_get_bd_addr(packet, addr); 2704 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2705 if (!conn) break; 2706 2707 hci_pairing_complete(conn, ERROR_CODE_SUCCESS); 2708 2709 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2710 // Change Connection Encryption keeps link key type 2711 if (link_key_type != CHANGED_COMBINATION_KEY){ 2712 conn->link_key_type = link_key_type; 2713 } 2714 // cache link key. link keys stored in little-endian format for legacy reasons 2715 memcpy(&conn->link_key, &packet[8], 16); 2716 2717 // only store link key: 2718 // - if bondable enabled 2719 if (hci_stack->bondable == false) break; 2720 // - if security level sufficient 2721 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2722 // - for SSP, also check if remote side requested bonding as well 2723 if (conn->link_key_type != COMBINATION_KEY){ 2724 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2725 if (!remote_bonding){ 2726 break; 2727 } 2728 } 2729 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2730 break; 2731 } 2732 2733 case HCI_EVENT_PIN_CODE_REQUEST: 2734 hci_event_pin_code_request_get_bd_addr(packet, addr); 2735 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2736 if (!conn) break; 2737 2738 hci_pairing_started(conn, false); 2739 // abort pairing if: non-bondable mode (event is not forwarded to app) 2740 if (!hci_stack->bondable ){ 2741 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2742 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2743 hci_run(); 2744 return; 2745 } 2746 // abort pairing if: Secure Connections Only mode (event is not forwarded to app) 2747 if (hci_stack->gap_secure_connections_only_mode){ 2748 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2749 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2750 hci_run(); 2751 return; 2752 } 2753 break; 2754 2755 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2756 hci_event_io_capability_response_get_bd_addr(packet, addr); 2757 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2758 if (!conn) break; 2759 2760 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2761 hci_pairing_started(conn, true); 2762 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2763 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2764 break; 2765 2766 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2767 hci_event_io_capability_response_get_bd_addr(packet, addr); 2768 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2769 if (!conn) break; 2770 2771 hci_connection_timestamp(conn); 2772 2773 hci_pairing_started(conn, true); 2774 2775 // assess security 2776 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2777 log_info("Level 4 required, but SC not supported -> abort"); 2778 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2779 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2780 break; 2781 } 2782 2783 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2784 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2785 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2786 } else { 2787 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2788 } 2789 #endif 2790 break; 2791 2792 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2793 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2794 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2795 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2796 break; 2797 #endif 2798 2799 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2800 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2801 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2802 if (!conn) break; 2803 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2804 if (hci_stack->ssp_auto_accept){ 2805 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2806 }; 2807 } else { 2808 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2809 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2810 // don't forward event to app 2811 hci_run(); 2812 return; 2813 } 2814 break; 2815 2816 case HCI_EVENT_USER_PASSKEY_REQUEST: 2817 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2818 if (hci_stack->ssp_auto_accept){ 2819 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2820 }; 2821 break; 2822 2823 case HCI_EVENT_MODE_CHANGE: 2824 handle = hci_event_mode_change_get_handle(packet); 2825 conn = hci_connection_for_handle(handle); 2826 if (!conn) break; 2827 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2828 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2829 break; 2830 #endif 2831 2832 case HCI_EVENT_ENCRYPTION_CHANGE: 2833 handle = hci_event_encryption_change_get_connection_handle(packet); 2834 conn = hci_connection_for_handle(handle); 2835 if (!conn) break; 2836 if (hci_event_encryption_change_get_status(packet) == 0u) { 2837 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2838 if (encryption_enabled){ 2839 if (hci_is_le_connection(conn)){ 2840 // For LE, we accept connection as encrypted 2841 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2842 } 2843 #ifdef ENABLE_CLASSIC 2844 else { 2845 2846 // dedicated bonding: send result and disconnect 2847 if (conn->bonding_flags & BONDING_DEDICATED){ 2848 conn->bonding_flags &= ~BONDING_DEDICATED; 2849 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2850 conn->bonding_status = packet[2]; 2851 break; 2852 } 2853 2854 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2855 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2856 bool connected_uses_aes_ccm = encryption_enabled == 2; 2857 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2858 log_info("SC during pairing, but only E0 now -> abort"); 2859 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2860 break; 2861 } 2862 2863 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2864 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2865 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2866 } else { 2867 // if not, pretend everything is perfect 2868 hci_handle_read_encryption_key_size_complete(conn, 16); 2869 } 2870 } 2871 #endif 2872 } else { 2873 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2874 } 2875 } 2876 2877 break; 2878 2879 #ifdef ENABLE_CLASSIC 2880 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2881 handle = hci_event_authentication_complete_get_connection_handle(packet); 2882 conn = hci_connection_for_handle(handle); 2883 if (!conn) break; 2884 2885 // clear authentication active flag 2886 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2887 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2888 2889 // authenticated only if auth status == 0 2890 if (hci_event_authentication_complete_get_status(packet) == 0){ 2891 // authenticated 2892 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2893 2894 // If not already encrypted, start encryption 2895 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2896 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2897 break; 2898 } 2899 } 2900 2901 // emit updated security level 2902 conn->requested_security_level = LEVEL_0; 2903 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2904 break; 2905 2906 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2907 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2908 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2909 if (!conn) break; 2910 2911 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2912 break; 2913 #endif 2914 2915 // HCI_EVENT_DISCONNECTION_COMPLETE 2916 // has been split, to first notify stack before shutting connection down 2917 // see end of function, too. 2918 case HCI_EVENT_DISCONNECTION_COMPLETE: 2919 if (packet[2]) break; // status != 0 2920 handle = little_endian_read_16(packet, 3); 2921 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2922 if (hci_stack->acl_fragmentation_total_size > 0u) { 2923 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2924 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2925 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2926 hci_stack->acl_fragmentation_total_size = 0; 2927 hci_stack->acl_fragmentation_pos = 0; 2928 if (release_buffer){ 2929 hci_release_packet_buffer(); 2930 } 2931 } 2932 } 2933 2934 conn = hci_connection_for_handle(handle); 2935 if (!conn) break; 2936 #ifdef ENABLE_CLASSIC 2937 // pairing failed if it was ongoing 2938 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2939 #endif 2940 // mark connection for shutdown 2941 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2942 2943 // emit dedicatd bonding event 2944 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2945 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2946 } 2947 2948 #ifdef ENABLE_BLE 2949 #ifdef ENABLE_LE_PERIPHERAL 2950 // re-enable advertisements for le connections if active 2951 if (hci_is_le_connection(conn)){ 2952 hci_update_advertisements_enabled_for_current_roles(); 2953 } 2954 #endif 2955 #endif 2956 break; 2957 2958 case HCI_EVENT_HARDWARE_ERROR: 2959 log_error("Hardware Error: 0x%02x", packet[2]); 2960 if (hci_stack->hardware_error_callback){ 2961 (*hci_stack->hardware_error_callback)(packet[2]); 2962 } else { 2963 // if no special requests, just reboot stack 2964 hci_power_control_off(); 2965 hci_power_control_on(); 2966 } 2967 break; 2968 2969 #ifdef ENABLE_CLASSIC 2970 case HCI_EVENT_ROLE_CHANGE: 2971 if (packet[2]) break; // status != 0 2972 reverse_bd_addr(&packet[3], addr); 2973 addr_type = BD_ADDR_TYPE_ACL; 2974 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2975 if (!conn) break; 2976 conn->role = packet[9]; 2977 break; 2978 #endif 2979 2980 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2981 // release packet buffer only for asynchronous transport and if there are not further fragements 2982 if (hci_transport_synchronous()) { 2983 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2984 return; // instead of break: to avoid re-entering hci_run() 2985 } 2986 hci_stack->acl_fragmentation_tx_active = 0; 2987 if (hci_stack->acl_fragmentation_total_size) break; 2988 hci_release_packet_buffer(); 2989 2990 // L2CAP receives this event via the hci_emit_event below 2991 2992 #ifdef ENABLE_CLASSIC 2993 // For SCO, we do the can_send_now_check here 2994 hci_notify_if_sco_can_send_now(); 2995 #endif 2996 break; 2997 2998 #ifdef ENABLE_CLASSIC 2999 case HCI_EVENT_SCO_CAN_SEND_NOW: 3000 // For SCO, we do the can_send_now_check here 3001 hci_stack->sco_can_send_now = 1; 3002 hci_notify_if_sco_can_send_now(); 3003 return; 3004 3005 // explode inquriy results for easier consumption 3006 case HCI_EVENT_INQUIRY_RESULT: 3007 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3008 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3009 gap_inquiry_explode(packet, size); 3010 break; 3011 #endif 3012 3013 #ifdef ENABLE_BLE 3014 case HCI_EVENT_LE_META: 3015 switch (packet[2]){ 3016 #ifdef ENABLE_LE_CENTRAL 3017 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3018 // log_info("advertising report received"); 3019 if (!hci_stack->le_scanning_enabled) break; 3020 le_handle_advertisement_report(packet, size); 3021 break; 3022 #endif 3023 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3024 event_handle_le_connection_complete(packet); 3025 break; 3026 3027 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3028 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3029 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3030 conn = hci_connection_for_handle(handle); 3031 if (!conn) break; 3032 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3033 break; 3034 3035 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3036 // connection 3037 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3038 conn = hci_connection_for_handle(handle); 3039 if (conn) { 3040 // read arguments 3041 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3042 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3043 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3044 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3045 3046 // validate against current connection parameter range 3047 le_connection_parameter_range_t existing_range; 3048 gap_get_connection_parameter_range(&existing_range); 3049 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3050 if (update_parameter){ 3051 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3052 conn->le_conn_interval_min = le_conn_interval_min; 3053 conn->le_conn_interval_max = le_conn_interval_max; 3054 conn->le_conn_latency = le_conn_latency; 3055 conn->le_supervision_timeout = le_supervision_timeout; 3056 } else { 3057 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3058 } 3059 } 3060 break; 3061 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3062 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3063 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3064 conn = hci_connection_for_handle(handle); 3065 if (conn) { 3066 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3067 } 3068 break; 3069 #endif 3070 default: 3071 break; 3072 } 3073 break; 3074 #endif 3075 case HCI_EVENT_VENDOR_SPECIFIC: 3076 // Vendor specific commands often create vendor specific event instead of num completed packets 3077 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3078 switch (hci_stack->manufacturer){ 3079 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3080 hci_stack->num_cmd_packets = 1; 3081 break; 3082 default: 3083 break; 3084 } 3085 break; 3086 default: 3087 break; 3088 } 3089 3090 handle_event_for_current_stack_state(packet, size); 3091 3092 // notify upper stack 3093 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3094 3095 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3096 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3097 handle = little_endian_read_16(packet, 3); 3098 hci_connection_t * aConn = hci_connection_for_handle(handle); 3099 // discard connection if app did not trigger a reconnect in the event handler 3100 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3101 hci_shutdown_connection(aConn); 3102 } 3103 } 3104 3105 // execute main loop 3106 hci_run(); 3107 } 3108 3109 #ifdef ENABLE_CLASSIC 3110 3111 #ifdef ENABLE_SCO_OVER_HCI 3112 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3113 static void sco_schedule_tx(hci_connection_t * conn); 3114 3115 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3116 log_debug("SCO TX Timeout"); 3117 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3118 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3119 if (!conn) return; 3120 3121 // trigger send 3122 conn->sco_tx_ready = 1; 3123 // extra packet if CVSD but SCO buffer is too short 3124 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3125 conn->sco_tx_ready++; 3126 } 3127 hci_notify_if_sco_can_send_now(); 3128 } 3129 3130 3131 #define SCO_TX_AFTER_RX_MS (6) 3132 3133 static void sco_schedule_tx(hci_connection_t * conn){ 3134 3135 uint32_t now = btstack_run_loop_get_time_ms(); 3136 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3137 int time_delta_ms = sco_tx_ms - now; 3138 3139 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3140 3141 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3142 btstack_run_loop_set_timer(timer, time_delta_ms); 3143 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3144 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3145 btstack_run_loop_add_timer(timer); 3146 } 3147 #endif 3148 3149 static void sco_handler(uint8_t * packet, uint16_t size){ 3150 // lookup connection struct 3151 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3152 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3153 if (!conn) return; 3154 3155 #ifdef ENABLE_SCO_OVER_HCI 3156 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3157 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3158 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3159 packet[2] = 0x3c; 3160 memmove(&packet[3], &packet[23], 63); 3161 size = 63; 3162 } 3163 } 3164 3165 if (hci_have_usb_transport()){ 3166 // Nothing to do 3167 } else { 3168 // 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); 3169 if (hci_stack->synchronous_flow_control_enabled == 0){ 3170 uint32_t now = btstack_run_loop_get_time_ms(); 3171 3172 if (!conn->sco_rx_valid){ 3173 // ignore first 10 packets 3174 conn->sco_rx_count++; 3175 // log_debug("sco rx count %u", conn->sco_rx_count); 3176 if (conn->sco_rx_count == 10) { 3177 // use first timestamp as is and pretent it just started 3178 conn->sco_rx_ms = now; 3179 conn->sco_rx_valid = 1; 3180 conn->sco_rx_count = 0; 3181 sco_schedule_tx(conn); 3182 } 3183 } else { 3184 // track expected arrival timme 3185 conn->sco_rx_count++; 3186 conn->sco_rx_ms += 7; 3187 int delta = (int32_t) (now - conn->sco_rx_ms); 3188 if (delta > 0){ 3189 conn->sco_rx_ms++; 3190 } 3191 // log_debug("sco rx %u", conn->sco_rx_ms); 3192 sco_schedule_tx(conn); 3193 } 3194 } 3195 } 3196 #endif 3197 3198 // deliver to app 3199 if (hci_stack->sco_packet_handler) { 3200 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3201 } 3202 3203 #ifdef HAVE_SCO_TRANSPORT 3204 // We can send one packet for each received packet 3205 conn->sco_tx_ready++; 3206 hci_notify_if_sco_can_send_now(); 3207 #endif 3208 3209 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3210 conn->num_packets_completed++; 3211 hci_stack->host_completed_packets = 1; 3212 hci_run(); 3213 #endif 3214 } 3215 #endif 3216 3217 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3218 hci_dump_packet(packet_type, 1, packet, size); 3219 switch (packet_type) { 3220 case HCI_EVENT_PACKET: 3221 event_handler(packet, size); 3222 break; 3223 case HCI_ACL_DATA_PACKET: 3224 acl_handler(packet, size); 3225 break; 3226 #ifdef ENABLE_CLASSIC 3227 case HCI_SCO_DATA_PACKET: 3228 sco_handler(packet, size); 3229 break; 3230 #endif 3231 default: 3232 break; 3233 } 3234 } 3235 3236 /** 3237 * @brief Add event packet handler. 3238 */ 3239 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3240 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3241 } 3242 3243 3244 /** Register HCI packet handlers */ 3245 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3246 hci_stack->acl_packet_handler = handler; 3247 } 3248 3249 #ifdef ENABLE_CLASSIC 3250 /** 3251 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3252 */ 3253 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3254 hci_stack->sco_packet_handler = handler; 3255 } 3256 #endif 3257 3258 static void hci_state_reset(void){ 3259 // no connections yet 3260 hci_stack->connections = NULL; 3261 3262 // keep discoverable/connectable as this has been requested by the client(s) 3263 // hci_stack->discoverable = 0; 3264 // hci_stack->connectable = 0; 3265 // hci_stack->bondable = 1; 3266 // hci_stack->own_addr_type = 0; 3267 3268 // buffer is free 3269 hci_stack->hci_packet_buffer_reserved = 0; 3270 3271 // no pending cmds 3272 hci_stack->decline_reason = 0; 3273 hci_stack->new_scan_enable_value = 0xff; 3274 3275 hci_stack->secure_connections_active = false; 3276 3277 #ifdef ENABLE_CLASSIC 3278 hci_stack->new_page_scan_interval = 0xffff; 3279 hci_stack->new_page_scan_window = 0xffff; 3280 hci_stack->new_page_scan_type = 0xff; 3281 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3282 #endif 3283 3284 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3285 hci_stack->classic_read_local_oob_data = true; 3286 #endif 3287 3288 // LE 3289 #ifdef ENABLE_BLE 3290 memset(hci_stack->le_random_address, 0, 6); 3291 hci_stack->le_random_address_set = 0; 3292 #endif 3293 #ifdef ENABLE_LE_CENTRAL 3294 hci_stack->le_scanning_active = false; 3295 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3296 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3297 hci_stack->le_whitelist_capacity = 0; 3298 #endif 3299 #ifdef ENABLE_LE_PERIPHERAL 3300 hci_stack->le_advertisements_active = false; 3301 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3302 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3303 } 3304 if (hci_stack->le_advertisements_data != NULL){ 3305 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3306 } 3307 #endif 3308 } 3309 3310 #ifdef ENABLE_CLASSIC 3311 /** 3312 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3313 */ 3314 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3315 // store and open remote device db 3316 hci_stack->link_key_db = link_key_db; 3317 if (hci_stack->link_key_db) { 3318 hci_stack->link_key_db->open(); 3319 } 3320 } 3321 #endif 3322 3323 void hci_init(const hci_transport_t *transport, const void *config){ 3324 3325 #ifdef HAVE_MALLOC 3326 if (!hci_stack) { 3327 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3328 } 3329 #else 3330 hci_stack = &hci_stack_static; 3331 #endif 3332 memset(hci_stack, 0, sizeof(hci_stack_t)); 3333 3334 // reference to use transport layer implementation 3335 hci_stack->hci_transport = transport; 3336 3337 // reference to used config 3338 hci_stack->config = config; 3339 3340 // setup pointer for outgoing packet buffer 3341 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3342 3343 // max acl payload size defined in config.h 3344 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3345 3346 // register packet handlers with transport 3347 transport->register_packet_handler(&packet_handler); 3348 3349 hci_stack->state = HCI_STATE_OFF; 3350 3351 // class of device 3352 hci_stack->class_of_device = 0x007a020c; // Smartphone 3353 3354 // bondable by default 3355 hci_stack->bondable = 1; 3356 3357 #ifdef ENABLE_CLASSIC 3358 // classic name 3359 hci_stack->local_name = default_classic_name; 3360 3361 // Master slave policy 3362 hci_stack->master_slave_policy = 1; 3363 3364 // Allow Role Switch 3365 hci_stack->allow_role_switch = 1; 3366 3367 // Default / minimum security level = 2 3368 hci_stack->gap_security_level = LEVEL_2; 3369 3370 // Default Security Mode 4 3371 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3372 3373 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3374 hci_stack->gap_required_encyrption_key_size = 7; 3375 3376 // Link Supervision Timeout 3377 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3378 3379 #endif 3380 3381 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3382 hci_stack->ssp_enable = 1; 3383 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3384 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3385 hci_stack->ssp_auto_accept = 1; 3386 3387 // Secure Connections: enable (requires support from Controller) 3388 hci_stack->secure_connections_enable = true; 3389 3390 // voice setting - signed 16 bit pcm data with CVSD over the air 3391 hci_stack->sco_voice_setting = 0x60; 3392 3393 #ifdef ENABLE_LE_CENTRAL 3394 // connection parameter to use for outgoing connections 3395 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3396 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3397 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3398 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3399 hci_stack->le_connection_latency = 4; // 4 3400 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3401 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3402 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3403 3404 // default LE Scanning 3405 hci_stack->le_scan_type = 0x1; // active 3406 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3407 hci_stack->le_scan_window = 0x30; // 30 ms 3408 #endif 3409 3410 #ifdef ENABLE_LE_PERIPHERAL 3411 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3412 #endif 3413 3414 // connection parameter range used to answer connection parameter update requests in l2cap 3415 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3416 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3417 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3418 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3419 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3420 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3421 3422 hci_state_reset(); 3423 } 3424 3425 void hci_deinit(void){ 3426 #ifdef HAVE_MALLOC 3427 if (hci_stack) { 3428 free(hci_stack); 3429 } 3430 #endif 3431 hci_stack = NULL; 3432 3433 #ifdef ENABLE_CLASSIC 3434 disable_l2cap_timeouts = 0; 3435 #endif 3436 } 3437 3438 /** 3439 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3440 */ 3441 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3442 hci_stack->chipset = chipset_driver; 3443 3444 // reset chipset driver - init is also called on power_up 3445 if (hci_stack->chipset && hci_stack->chipset->init){ 3446 hci_stack->chipset->init(hci_stack->config); 3447 } 3448 } 3449 3450 /** 3451 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3452 */ 3453 void hci_set_control(const btstack_control_t *hardware_control){ 3454 // references to used control implementation 3455 hci_stack->control = hardware_control; 3456 // init with transport config 3457 hardware_control->init(hci_stack->config); 3458 } 3459 3460 void hci_close(void){ 3461 3462 #ifdef ENABLE_CLASSIC 3463 // close remote device db 3464 if (hci_stack->link_key_db) { 3465 hci_stack->link_key_db->close(); 3466 } 3467 #endif 3468 3469 btstack_linked_list_iterator_t lit; 3470 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3471 while (btstack_linked_list_iterator_has_next(&lit)){ 3472 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3473 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3474 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3475 hci_shutdown_connection(connection); 3476 } 3477 3478 hci_power_control(HCI_POWER_OFF); 3479 3480 #ifdef HAVE_MALLOC 3481 free(hci_stack); 3482 #endif 3483 hci_stack = NULL; 3484 } 3485 3486 #ifdef HAVE_SCO_TRANSPORT 3487 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3488 hci_stack->sco_transport = sco_transport; 3489 sco_transport->register_packet_handler(&packet_handler); 3490 } 3491 #endif 3492 3493 #ifdef ENABLE_CLASSIC 3494 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3495 // validate ranage and set 3496 if (encryption_key_size < 7) return; 3497 if (encryption_key_size > 16) return; 3498 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3499 } 3500 3501 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3502 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3503 hci_stack->gap_security_mode = security_mode; 3504 return ERROR_CODE_SUCCESS; 3505 } else { 3506 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3507 } 3508 } 3509 3510 gap_security_mode_t gap_get_security_mode(void){ 3511 return hci_stack->gap_security_mode; 3512 } 3513 3514 void gap_set_security_level(gap_security_level_t security_level){ 3515 hci_stack->gap_security_level = security_level; 3516 } 3517 3518 gap_security_level_t gap_get_security_level(void){ 3519 if (hci_stack->gap_secure_connections_only_mode){ 3520 return LEVEL_4; 3521 } 3522 return hci_stack->gap_security_level; 3523 } 3524 3525 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3526 hci_stack->gap_minimal_service_security_level = security_level; 3527 } 3528 3529 void gap_set_secure_connections_only_mode(bool enable){ 3530 hci_stack->gap_secure_connections_only_mode = enable; 3531 } 3532 3533 bool gap_get_secure_connections_only_mode(void){ 3534 return hci_stack->gap_secure_connections_only_mode; 3535 } 3536 #endif 3537 3538 #ifdef ENABLE_CLASSIC 3539 void gap_set_class_of_device(uint32_t class_of_device){ 3540 hci_stack->class_of_device = class_of_device; 3541 } 3542 3543 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3544 hci_stack->default_link_policy_settings = default_link_policy_settings; 3545 } 3546 3547 void gap_set_allow_role_switch(bool allow_role_switch){ 3548 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3549 } 3550 3551 uint8_t hci_get_allow_role_switch(void){ 3552 return hci_stack->allow_role_switch; 3553 } 3554 3555 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3556 hci_stack->link_supervision_timeout = link_supervision_timeout; 3557 } 3558 3559 void hci_disable_l2cap_timeout_check(void){ 3560 disable_l2cap_timeouts = 1; 3561 } 3562 #endif 3563 3564 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3565 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3566 void hci_set_bd_addr(bd_addr_t addr){ 3567 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3568 hci_stack->custom_bd_addr_set = 1; 3569 } 3570 #endif 3571 3572 // State-Module-Driver overview 3573 // state module low-level 3574 // HCI_STATE_OFF off close 3575 // HCI_STATE_INITIALIZING, on open 3576 // HCI_STATE_WORKING, on open 3577 // HCI_STATE_HALTING, on open 3578 // HCI_STATE_SLEEPING, off/sleep close 3579 // HCI_STATE_FALLING_ASLEEP on open 3580 3581 static int hci_power_control_on(void){ 3582 3583 // power on 3584 int err = 0; 3585 if (hci_stack->control && hci_stack->control->on){ 3586 err = (*hci_stack->control->on)(); 3587 } 3588 if (err){ 3589 log_error( "POWER_ON failed"); 3590 hci_emit_hci_open_failed(); 3591 return err; 3592 } 3593 3594 // int chipset driver 3595 if (hci_stack->chipset && hci_stack->chipset->init){ 3596 hci_stack->chipset->init(hci_stack->config); 3597 } 3598 3599 // init transport 3600 if (hci_stack->hci_transport->init){ 3601 hci_stack->hci_transport->init(hci_stack->config); 3602 } 3603 3604 // open transport 3605 err = hci_stack->hci_transport->open(); 3606 if (err){ 3607 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3608 if (hci_stack->control && hci_stack->control->off){ 3609 (*hci_stack->control->off)(); 3610 } 3611 hci_emit_hci_open_failed(); 3612 return err; 3613 } 3614 return 0; 3615 } 3616 3617 static void hci_power_control_off(void){ 3618 3619 log_info("hci_power_control_off"); 3620 3621 // close low-level device 3622 hci_stack->hci_transport->close(); 3623 3624 log_info("hci_power_control_off - hci_transport closed"); 3625 3626 // power off 3627 if (hci_stack->control && hci_stack->control->off){ 3628 (*hci_stack->control->off)(); 3629 } 3630 3631 log_info("hci_power_control_off - control closed"); 3632 3633 hci_stack->state = HCI_STATE_OFF; 3634 } 3635 3636 static void hci_power_control_sleep(void){ 3637 3638 log_info("hci_power_control_sleep"); 3639 3640 #if 0 3641 // don't close serial port during sleep 3642 3643 // close low-level device 3644 hci_stack->hci_transport->close(hci_stack->config); 3645 #endif 3646 3647 // sleep mode 3648 if (hci_stack->control && hci_stack->control->sleep){ 3649 (*hci_stack->control->sleep)(); 3650 } 3651 3652 hci_stack->state = HCI_STATE_SLEEPING; 3653 } 3654 3655 static int hci_power_control_wake(void){ 3656 3657 log_info("hci_power_control_wake"); 3658 3659 // wake on 3660 if (hci_stack->control && hci_stack->control->wake){ 3661 (*hci_stack->control->wake)(); 3662 } 3663 3664 #if 0 3665 // open low-level device 3666 int err = hci_stack->hci_transport->open(hci_stack->config); 3667 if (err){ 3668 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3669 if (hci_stack->control && hci_stack->control->off){ 3670 (*hci_stack->control->off)(); 3671 } 3672 hci_emit_hci_open_failed(); 3673 return err; 3674 } 3675 #endif 3676 3677 return 0; 3678 } 3679 3680 static void hci_power_transition_to_initializing(void){ 3681 // set up state machine 3682 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3683 hci_stack->hci_packet_buffer_reserved = 0; 3684 hci_stack->state = HCI_STATE_INITIALIZING; 3685 hci_stack->substate = HCI_INIT_SEND_RESET; 3686 } 3687 3688 // returns error 3689 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3690 int err; 3691 switch (power_mode){ 3692 case HCI_POWER_ON: 3693 err = hci_power_control_on(); 3694 if (err != 0) { 3695 log_error("hci_power_control_on() error %d", err); 3696 return err; 3697 } 3698 hci_power_transition_to_initializing(); 3699 break; 3700 case HCI_POWER_OFF: 3701 // do nothing 3702 break; 3703 case HCI_POWER_SLEEP: 3704 // do nothing (with SLEEP == OFF) 3705 break; 3706 default: 3707 btstack_assert(false); 3708 break; 3709 } 3710 return ERROR_CODE_SUCCESS; 3711 } 3712 3713 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3714 switch (power_mode){ 3715 case HCI_POWER_ON: 3716 // do nothing 3717 break; 3718 case HCI_POWER_OFF: 3719 // no connections yet, just turn it off 3720 hci_power_control_off(); 3721 break; 3722 case HCI_POWER_SLEEP: 3723 // no connections yet, just turn it off 3724 hci_power_control_sleep(); 3725 break; 3726 default: 3727 btstack_assert(false); 3728 break; 3729 } 3730 return ERROR_CODE_SUCCESS; 3731 } 3732 3733 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3734 switch (power_mode){ 3735 case HCI_POWER_ON: 3736 // do nothing 3737 break; 3738 case HCI_POWER_OFF: 3739 // see hci_run 3740 hci_stack->state = HCI_STATE_HALTING; 3741 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3742 break; 3743 case HCI_POWER_SLEEP: 3744 // see hci_run 3745 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3746 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3747 break; 3748 default: 3749 btstack_assert(false); 3750 break; 3751 } 3752 return ERROR_CODE_SUCCESS; 3753 } 3754 3755 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3756 switch (power_mode){ 3757 case HCI_POWER_ON: 3758 hci_power_transition_to_initializing(); 3759 break; 3760 case HCI_POWER_OFF: 3761 // do nothing 3762 break; 3763 case HCI_POWER_SLEEP: 3764 // see hci_run 3765 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3766 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3767 break; 3768 default: 3769 btstack_assert(false); 3770 break; 3771 } 3772 return ERROR_CODE_SUCCESS; 3773 } 3774 3775 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3776 switch (power_mode){ 3777 case HCI_POWER_ON: 3778 3779 #ifdef HAVE_PLATFORM_IPHONE_OS 3780 // nothing to do, if H4 supports power management 3781 if (btstack_control_iphone_power_management_enabled()){ 3782 hci_stack->state = HCI_STATE_INITIALIZING; 3783 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3784 break; 3785 } 3786 #endif 3787 hci_power_transition_to_initializing(); 3788 break; 3789 case HCI_POWER_OFF: 3790 // see hci_run 3791 hci_stack->state = HCI_STATE_HALTING; 3792 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3793 break; 3794 case HCI_POWER_SLEEP: 3795 // do nothing 3796 break; 3797 default: 3798 btstack_assert(false); 3799 break; 3800 } 3801 return ERROR_CODE_SUCCESS; 3802 } 3803 3804 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3805 int err; 3806 switch (power_mode){ 3807 case HCI_POWER_ON: 3808 #ifdef HAVE_PLATFORM_IPHONE_OS 3809 // nothing to do, if H4 supports power management 3810 if (btstack_control_iphone_power_management_enabled()){ 3811 hci_stack->state = HCI_STATE_INITIALIZING; 3812 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3813 hci_update_scan_enable(); 3814 break; 3815 } 3816 #endif 3817 err = hci_power_control_wake(); 3818 if (err) return err; 3819 hci_power_transition_to_initializing(); 3820 break; 3821 case HCI_POWER_OFF: 3822 hci_stack->state = HCI_STATE_HALTING; 3823 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3824 break; 3825 case HCI_POWER_SLEEP: 3826 // do nothing 3827 break; 3828 default: 3829 btstack_assert(false); 3830 break; 3831 } 3832 return ERROR_CODE_SUCCESS; 3833 } 3834 3835 int hci_power_control(HCI_POWER_MODE power_mode){ 3836 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3837 int err = 0; 3838 switch (hci_stack->state){ 3839 case HCI_STATE_OFF: 3840 err = hci_power_control_state_off(power_mode); 3841 break; 3842 case HCI_STATE_INITIALIZING: 3843 err = hci_power_control_state_initializing(power_mode); 3844 break; 3845 case HCI_STATE_WORKING: 3846 err = hci_power_control_state_working(power_mode); 3847 break; 3848 case HCI_STATE_HALTING: 3849 err = hci_power_control_state_halting(power_mode); 3850 break; 3851 case HCI_STATE_FALLING_ASLEEP: 3852 err = hci_power_control_state_falling_asleep(power_mode); 3853 break; 3854 case HCI_STATE_SLEEPING: 3855 err = hci_power_control_state_sleeping(power_mode); 3856 break; 3857 default: 3858 btstack_assert(false); 3859 break; 3860 } 3861 if (err != 0){ 3862 return err; 3863 } 3864 3865 // create internal event 3866 hci_emit_state(); 3867 3868 // trigger next/first action 3869 hci_run(); 3870 3871 return 0; 3872 } 3873 3874 3875 #ifdef ENABLE_CLASSIC 3876 3877 static void hci_update_scan_enable(void){ 3878 // 2 = page scan, 1 = inq scan 3879 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3880 hci_run(); 3881 } 3882 3883 void gap_discoverable_control(uint8_t enable){ 3884 if (enable) enable = 1; // normalize argument 3885 3886 if (hci_stack->discoverable == enable){ 3887 hci_emit_discoverable_enabled(hci_stack->discoverable); 3888 return; 3889 } 3890 3891 hci_stack->discoverable = enable; 3892 hci_update_scan_enable(); 3893 } 3894 3895 void gap_connectable_control(uint8_t enable){ 3896 if (enable) enable = 1; // normalize argument 3897 3898 // don't emit event 3899 if (hci_stack->connectable == enable) return; 3900 3901 hci_stack->connectable = enable; 3902 hci_update_scan_enable(); 3903 } 3904 #endif 3905 3906 void gap_local_bd_addr(bd_addr_t address_buffer){ 3907 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3908 } 3909 3910 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3911 static void hci_host_num_completed_packets(void){ 3912 3913 // create packet manually as arrays are not supported and num_commands should not get reduced 3914 hci_reserve_packet_buffer(); 3915 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3916 3917 uint16_t size = 0; 3918 uint16_t num_handles = 0; 3919 packet[size++] = 0x35; 3920 packet[size++] = 0x0c; 3921 size++; // skip param len 3922 size++; // skip num handles 3923 3924 // add { handle, packets } entries 3925 btstack_linked_item_t * it; 3926 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3927 hci_connection_t * connection = (hci_connection_t *) it; 3928 if (connection->num_packets_completed){ 3929 little_endian_store_16(packet, size, connection->con_handle); 3930 size += 2; 3931 little_endian_store_16(packet, size, connection->num_packets_completed); 3932 size += 2; 3933 // 3934 num_handles++; 3935 connection->num_packets_completed = 0; 3936 } 3937 } 3938 3939 packet[2] = size - 3; 3940 packet[3] = num_handles; 3941 3942 hci_stack->host_completed_packets = 0; 3943 3944 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3945 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3946 3947 // release packet buffer for synchronous transport implementations 3948 if (hci_transport_synchronous()){ 3949 hci_release_packet_buffer(); 3950 hci_emit_transport_packet_sent(); 3951 } 3952 } 3953 #endif 3954 3955 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3956 UNUSED(ds); 3957 hci_stack->substate = HCI_HALTING_CLOSE; 3958 // allow packet handlers to defer final shutdown 3959 hci_emit_state(); 3960 hci_run(); 3961 } 3962 3963 static bool hci_run_acl_fragments(void){ 3964 if (hci_stack->acl_fragmentation_total_size > 0u) { 3965 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3966 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3967 if (connection) { 3968 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3969 hci_send_acl_packet_fragments(connection); 3970 return true; 3971 } 3972 } else { 3973 // connection gone -> discard further fragments 3974 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3975 hci_stack->acl_fragmentation_total_size = 0; 3976 hci_stack->acl_fragmentation_pos = 0; 3977 } 3978 } 3979 return false; 3980 } 3981 3982 #ifdef ENABLE_CLASSIC 3983 static bool hci_run_general_gap_classic(void){ 3984 3985 // decline incoming connections 3986 if (hci_stack->decline_reason){ 3987 uint8_t reason = hci_stack->decline_reason; 3988 hci_stack->decline_reason = 0; 3989 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3990 return true; 3991 } 3992 // write page scan activity 3993 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 3994 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 3995 hci_stack->new_page_scan_interval = 0xffff; 3996 hci_stack->new_page_scan_window = 0xffff; 3997 return true; 3998 } 3999 // write page scan type 4000 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4001 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4002 hci_stack->new_page_scan_type = 0xff; 4003 return true; 4004 } 4005 // send scan enable 4006 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4007 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4008 hci_stack->new_scan_enable_value = 0xff; 4009 return true; 4010 } 4011 // start/stop inquiry 4012 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4013 uint8_t duration = hci_stack->inquiry_state; 4014 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4015 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4016 return true; 4017 } 4018 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4019 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4020 hci_send_cmd(&hci_inquiry_cancel); 4021 return true; 4022 } 4023 // remote name request 4024 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4025 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4026 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4027 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4028 return true; 4029 } 4030 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4031 // Local OOB data 4032 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4033 hci_stack->classic_read_local_oob_data = false; 4034 if (hci_stack->local_supported_commands[1] & 0x10u){ 4035 hci_send_cmd(&hci_read_local_extended_oob_data); 4036 } else { 4037 hci_send_cmd(&hci_read_local_oob_data); 4038 } 4039 } 4040 #endif 4041 // pairing 4042 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4043 uint8_t state = hci_stack->gap_pairing_state; 4044 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4045 uint8_t pin_code[16]; 4046 switch (state){ 4047 case GAP_PAIRING_STATE_SEND_PIN: 4048 memset(pin_code, 0, 16); 4049 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4050 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4051 break; 4052 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4053 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4054 break; 4055 case GAP_PAIRING_STATE_SEND_PASSKEY: 4056 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4057 break; 4058 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4059 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4060 break; 4061 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4062 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4063 break; 4064 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4065 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4066 break; 4067 default: 4068 break; 4069 } 4070 return true; 4071 } 4072 return false; 4073 } 4074 #endif 4075 4076 #ifdef ENABLE_BLE 4077 static bool hci_run_general_gap_le(void){ 4078 4079 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4080 4081 if (hci_stack->state != HCI_STATE_WORKING) return false; 4082 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4083 4084 4085 // Phase 1: collect what to stop 4086 4087 bool scanning_stop = false; 4088 bool connecting_stop = false; 4089 bool advertising_stop = false; 4090 4091 #ifndef ENABLE_LE_CENTRAL 4092 UNUSED(scanning_stop); 4093 UNUSED(connecting_stop); 4094 #endif 4095 #ifndef ENABLE_LE_PERIPHERAL 4096 UNUSED(advertising_stop); 4097 #endif 4098 4099 // check if whitelist needs modification 4100 bool whitelist_modification_pending = false; 4101 btstack_linked_list_iterator_t lit; 4102 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4103 while (btstack_linked_list_iterator_has_next(&lit)){ 4104 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4105 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4106 whitelist_modification_pending = true; 4107 break; 4108 } 4109 } 4110 // check if resolving list needs modification 4111 bool resolving_list_modification_pending = false; 4112 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4113 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4114 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4115 resolving_list_modification_pending = true; 4116 } 4117 #endif 4118 4119 #ifdef ENABLE_LE_CENTRAL 4120 // scanning control 4121 if (hci_stack->le_scanning_active) { 4122 // stop if: 4123 // - parameter change required 4124 // - it's disabled 4125 // - whitelist change required but used for scanning 4126 // - resolving list modified 4127 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4128 if ((hci_stack->le_scanning_param_update) || 4129 !hci_stack->le_scanning_enabled || 4130 scanning_uses_whitelist || 4131 resolving_list_modification_pending){ 4132 4133 scanning_stop = true; 4134 } 4135 } 4136 #endif 4137 4138 #ifdef ENABLE_LE_CENTRAL 4139 // connecting control 4140 bool connecting_with_whitelist; 4141 switch (hci_stack->le_connecting_state){ 4142 case LE_CONNECTING_DIRECT: 4143 case LE_CONNECTING_WHITELIST: 4144 // stop connecting if: 4145 // - connecting uses white and whitelist modification pending 4146 // - if it got disabled 4147 // - resolving list modified 4148 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4149 if ((connecting_with_whitelist && whitelist_modification_pending) || 4150 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4151 resolving_list_modification_pending) { 4152 4153 connecting_stop = true; 4154 } 4155 break; 4156 default: 4157 break; 4158 } 4159 #endif 4160 4161 #ifdef ENABLE_LE_PERIPHERAL 4162 // le advertisement control 4163 if (hci_stack->le_advertisements_active){ 4164 // stop if: 4165 // - parameter change required 4166 // - it's disabled 4167 // - whitelist change required but used for advertisement filter policy 4168 // - resolving list modified 4169 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4170 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4171 if (advertising_change || 4172 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4173 (advertising_uses_whitelist & whitelist_modification_pending) || 4174 resolving_list_modification_pending) { 4175 4176 advertising_stop = true; 4177 } 4178 } 4179 #endif 4180 4181 4182 // Phase 2: stop everything that should be off during modifications 4183 4184 #ifdef ENABLE_LE_CENTRAL 4185 if (scanning_stop){ 4186 hci_stack->le_scanning_active = false; 4187 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4188 return true; 4189 } 4190 #endif 4191 4192 #ifdef ENABLE_LE_CENTRAL 4193 if (connecting_stop){ 4194 hci_send_cmd(&hci_le_create_connection_cancel); 4195 return true; 4196 } 4197 #endif 4198 4199 #ifdef ENABLE_LE_PERIPHERAL 4200 if (advertising_stop){ 4201 hci_stack->le_advertisements_active = false; 4202 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4203 return true; 4204 } 4205 #endif 4206 4207 // Phase 3: modify 4208 4209 #ifdef ENABLE_LE_CENTRAL 4210 if (hci_stack->le_scanning_param_update){ 4211 hci_stack->le_scanning_param_update = false; 4212 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4213 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4214 return true; 4215 } 4216 #endif 4217 4218 #ifdef ENABLE_LE_PERIPHERAL 4219 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4220 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4221 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4222 hci_send_cmd(&hci_le_set_advertising_parameters, 4223 hci_stack->le_advertisements_interval_min, 4224 hci_stack->le_advertisements_interval_max, 4225 hci_stack->le_advertisements_type, 4226 hci_stack->le_advertisements_own_addr_type, 4227 hci_stack->le_advertisements_direct_address_type, 4228 hci_stack->le_advertisements_direct_address, 4229 hci_stack->le_advertisements_channel_map, 4230 hci_stack->le_advertisements_filter_policy); 4231 return true; 4232 } 4233 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4234 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4235 uint8_t adv_data_clean[31]; 4236 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4237 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4238 hci_stack->le_advertisements_data_len); 4239 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4240 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4241 return true; 4242 } 4243 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4244 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4245 uint8_t scan_data_clean[31]; 4246 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4247 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4248 hci_stack->le_scan_response_data_len); 4249 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4250 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4251 return true; 4252 } 4253 #endif 4254 4255 4256 #ifdef ENABLE_LE_CENTRAL 4257 // if connect with whitelist was active and is not cancelled yet, wait until next time 4258 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4259 #endif 4260 4261 // LE Whitelist Management 4262 if (whitelist_modification_pending){ 4263 // add/remove entries 4264 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4265 while (btstack_linked_list_iterator_has_next(&lit)){ 4266 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4267 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4268 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4269 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4270 return true; 4271 } 4272 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4273 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4274 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4275 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4276 return true; 4277 } 4278 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4279 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4280 btstack_memory_whitelist_entry_free(entry); 4281 } 4282 } 4283 } 4284 4285 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4286 // LE Resolving List Management 4287 if (resolving_list_supported) { 4288 uint16_t i; 4289 switch (hci_stack->le_resolving_list_state) { 4290 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4291 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4292 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4293 return true; 4294 case LE_RESOLVING_LIST_READ_SIZE: 4295 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4296 hci_send_cmd(&hci_le_read_resolving_list_size); 4297 return true; 4298 case LE_RESOLVING_LIST_SEND_CLEAR: 4299 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4300 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4301 sizeof(hci_stack->le_resolving_list_add_entries)); 4302 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4303 sizeof(hci_stack->le_resolving_list_remove_entries)); 4304 hci_send_cmd(&hci_le_clear_resolving_list); 4305 return true; 4306 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4307 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4308 uint8_t offset = i >> 3; 4309 uint8_t mask = 1 << (i & 7); 4310 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4311 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4312 bd_addr_t peer_identity_addreses; 4313 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4314 sm_key_t peer_irk; 4315 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4316 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4317 4318 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4319 // trigger whitelist entry 'update' (work around for controller bug) 4320 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4321 while (btstack_linked_list_iterator_has_next(&lit)) { 4322 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4323 if (entry->address_type != peer_identity_addr_type) continue; 4324 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4325 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4326 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4327 } 4328 #endif 4329 4330 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4331 peer_identity_addreses); 4332 return true; 4333 } 4334 4335 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4336 4337 /* fall through */ 4338 4339 case LE_RESOLVING_LIST_ADD_ENTRIES: 4340 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4341 uint8_t offset = i >> 3; 4342 uint8_t mask = 1 << (i & 7); 4343 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4344 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4345 bd_addr_t peer_identity_addreses; 4346 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4347 sm_key_t peer_irk; 4348 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4349 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4350 const uint8_t *local_irk = gap_get_persistent_irk(); 4351 // command uses format specifier 'P' that stores 16-byte value without flip 4352 uint8_t local_irk_flipped[16]; 4353 uint8_t peer_irk_flipped[16]; 4354 reverse_128(local_irk, local_irk_flipped); 4355 reverse_128(peer_irk, peer_irk_flipped); 4356 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4357 peer_irk_flipped, local_irk_flipped); 4358 return true; 4359 } 4360 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4361 break; 4362 4363 default: 4364 break; 4365 } 4366 } 4367 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4368 #endif 4369 4370 // Phase 4: restore state 4371 4372 #ifdef ENABLE_LE_CENTRAL 4373 // re-start scanning 4374 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4375 hci_stack->le_scanning_active = true; 4376 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4377 return true; 4378 } 4379 #endif 4380 4381 #ifdef ENABLE_LE_CENTRAL 4382 // re-start connecting 4383 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4384 bd_addr_t null_addr; 4385 memset(null_addr, 0, 6); 4386 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4387 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4388 hci_send_cmd(&hci_le_create_connection, 4389 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4390 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4391 1, // use whitelist 4392 0, // peer address type 4393 null_addr, // peer bd addr 4394 hci_stack->le_connection_own_addr_type, // our addr type: 4395 hci_stack->le_connection_interval_min, // conn interval min 4396 hci_stack->le_connection_interval_max, // conn interval max 4397 hci_stack->le_connection_latency, // conn latency 4398 hci_stack->le_supervision_timeout, // conn latency 4399 hci_stack->le_minimum_ce_length, // min ce length 4400 hci_stack->le_maximum_ce_length // max ce length 4401 ); 4402 return true; 4403 } 4404 #endif 4405 4406 #ifdef ENABLE_LE_PERIPHERAL 4407 // re-start advertising 4408 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4409 // check if advertisements should be enabled given 4410 hci_stack->le_advertisements_active = true; 4411 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4412 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4413 return true; 4414 } 4415 #endif 4416 4417 return false; 4418 } 4419 #endif 4420 4421 static bool hci_run_general_pending_commands(void){ 4422 btstack_linked_item_t * it; 4423 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4424 hci_connection_t * connection = (hci_connection_t *) it; 4425 4426 switch(connection->state){ 4427 case SEND_CREATE_CONNECTION: 4428 switch(connection->address_type){ 4429 #ifdef ENABLE_CLASSIC 4430 case BD_ADDR_TYPE_ACL: 4431 log_info("sending hci_create_connection"); 4432 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4433 break; 4434 #endif 4435 default: 4436 #ifdef ENABLE_BLE 4437 #ifdef ENABLE_LE_CENTRAL 4438 log_info("sending hci_le_create_connection"); 4439 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4440 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4441 hci_send_cmd(&hci_le_create_connection, 4442 hci_stack->le_connection_scan_interval, // conn scan interval 4443 hci_stack->le_connection_scan_window, // conn scan windows 4444 0, // don't use whitelist 4445 connection->address_type, // peer address type 4446 connection->address, // peer bd addr 4447 hci_stack->le_connection_own_addr_type, // our addr type: 4448 hci_stack->le_connection_interval_min, // conn interval min 4449 hci_stack->le_connection_interval_max, // conn interval max 4450 hci_stack->le_connection_latency, // conn latency 4451 hci_stack->le_supervision_timeout, // conn latency 4452 hci_stack->le_minimum_ce_length, // min ce length 4453 hci_stack->le_maximum_ce_length // max ce length 4454 ); 4455 connection->state = SENT_CREATE_CONNECTION; 4456 #endif 4457 #endif 4458 break; 4459 } 4460 return true; 4461 4462 #ifdef ENABLE_CLASSIC 4463 case RECEIVED_CONNECTION_REQUEST: 4464 connection->role = HCI_ROLE_SLAVE; 4465 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4466 log_info("sending hci_accept_connection_request"); 4467 connection->state = ACCEPTED_CONNECTION_REQUEST; 4468 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4469 } 4470 return true; 4471 #endif 4472 4473 #ifdef ENABLE_BLE 4474 #ifdef ENABLE_LE_CENTRAL 4475 case SEND_CANCEL_CONNECTION: 4476 connection->state = SENT_CANCEL_CONNECTION; 4477 hci_send_cmd(&hci_le_create_connection_cancel); 4478 return true; 4479 #endif 4480 #endif 4481 case SEND_DISCONNECT: 4482 connection->state = SENT_DISCONNECT; 4483 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4484 return true; 4485 4486 default: 4487 break; 4488 } 4489 4490 // no further commands if connection is about to get shut down 4491 if (connection->state == SENT_DISCONNECT) continue; 4492 4493 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4494 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4495 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4496 return true; 4497 } 4498 4499 #ifdef ENABLE_CLASSIC 4500 4501 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4502 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4503 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4504 return true; 4505 } 4506 4507 // Handling link key request requires remote supported features 4508 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4509 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4510 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4511 4512 // lookup link key using cached key first 4513 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4514 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4515 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4516 } 4517 4518 bool sc_enabled_remote = hci_remote_sc_enabled(connection); 4519 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(connection->link_key_type) == 1) && !sc_enabled_remote; 4520 if (sc_downgrade){ 4521 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4522 connection->state = SENT_DISCONNECT; 4523 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4524 return true; 4525 } 4526 4527 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4528 if (have_link_key && security_level_sufficient){ 4529 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4530 } else { 4531 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4532 } 4533 return true; 4534 } 4535 4536 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4537 log_info("denying to pin request"); 4538 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4539 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4540 return true; 4541 } 4542 4543 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4544 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4545 // set authentication requirements: 4546 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4547 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4548 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4549 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4550 authreq |= 1; 4551 } 4552 bool bonding = hci_stack->bondable; 4553 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4554 // if we have received IO Cap Response, we're in responder role 4555 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4556 if (bonding && !remote_bonding){ 4557 log_info("Remote not bonding, dropping local flag"); 4558 bonding = false; 4559 } 4560 } 4561 if (bonding){ 4562 if (connection->bonding_flags & BONDING_DEDICATED){ 4563 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4564 } else { 4565 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4566 } 4567 } 4568 uint8_t have_oob_data = 0; 4569 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4570 if (connection->classic_oob_c_192 != NULL){ 4571 have_oob_data |= 1; 4572 } 4573 if (connection->classic_oob_c_256 != NULL){ 4574 have_oob_data |= 2; 4575 } 4576 #endif 4577 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4578 return true; 4579 } 4580 4581 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4582 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4583 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4584 return true; 4585 } 4586 4587 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4588 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4589 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4590 const uint8_t zero[16] = { 0 }; 4591 const uint8_t * r_192 = zero; 4592 const uint8_t * c_192 = zero; 4593 const uint8_t * r_256 = zero; 4594 const uint8_t * c_256 = zero; 4595 // verify P-256 OOB 4596 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4597 c_256 = connection->classic_oob_c_256; 4598 if (connection->classic_oob_r_256 != NULL) { 4599 r_256 = connection->classic_oob_r_256; 4600 } 4601 } 4602 // verify P-192 OOB 4603 if ((connection->classic_oob_c_192 != NULL)) { 4604 c_192 = connection->classic_oob_c_192; 4605 if (connection->classic_oob_r_192 != NULL) { 4606 r_192 = connection->classic_oob_r_192; 4607 } 4608 } 4609 // Reply 4610 if (c_256 != zero) { 4611 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4612 } else if (c_192 != zero){ 4613 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4614 } else { 4615 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4616 } 4617 return true; 4618 } 4619 #endif 4620 4621 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4622 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4623 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4624 return true; 4625 } 4626 4627 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4628 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4629 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4630 return true; 4631 } 4632 4633 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4634 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4635 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4636 return true; 4637 } 4638 4639 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4640 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4641 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4642 return true; 4643 } 4644 4645 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4646 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4647 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4648 return true; 4649 } 4650 4651 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4652 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4653 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4654 return true; 4655 } 4656 4657 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4658 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4659 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4660 connection->state = SENT_DISCONNECT; 4661 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4662 return true; 4663 } 4664 4665 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4666 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4667 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4668 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4669 return true; 4670 } 4671 4672 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4673 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4674 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4675 return true; 4676 } 4677 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4678 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4679 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4680 return true; 4681 } 4682 #endif 4683 4684 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4685 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4686 #ifdef ENABLE_CLASSIC 4687 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4688 #endif 4689 if (connection->state != SENT_DISCONNECT){ 4690 connection->state = SENT_DISCONNECT; 4691 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4692 return true; 4693 } 4694 } 4695 4696 #ifdef ENABLE_CLASSIC 4697 uint16_t sniff_min_interval; 4698 switch (connection->sniff_min_interval){ 4699 case 0: 4700 break; 4701 case 0xffff: 4702 connection->sniff_min_interval = 0; 4703 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4704 return true; 4705 default: 4706 sniff_min_interval = connection->sniff_min_interval; 4707 connection->sniff_min_interval = 0; 4708 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4709 return true; 4710 } 4711 4712 if (connection->sniff_subrating_max_latency != 0xffff){ 4713 uint16_t max_latency = connection->sniff_subrating_max_latency; 4714 connection->sniff_subrating_max_latency = 0; 4715 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4716 return true; 4717 } 4718 4719 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4720 uint8_t service_type = (uint8_t) connection->qos_service_type; 4721 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4722 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); 4723 return true; 4724 } 4725 4726 if (connection->request_role != HCI_ROLE_INVALID){ 4727 hci_role_t role = connection->request_role; 4728 connection->request_role = HCI_ROLE_INVALID; 4729 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4730 return true; 4731 } 4732 #endif 4733 4734 #ifdef ENABLE_BLE 4735 switch (connection->le_con_parameter_update_state){ 4736 // response to L2CAP CON PARAMETER UPDATE REQUEST 4737 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4738 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4739 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4740 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4741 0x0000, 0xffff); 4742 return true; 4743 case CON_PARAMETER_UPDATE_REPLY: 4744 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4745 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4746 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4747 0x0000, 0xffff); 4748 return true; 4749 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4750 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4751 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4752 return true; 4753 default: 4754 break; 4755 } 4756 if (connection->le_phy_update_all_phys != 0xffu){ 4757 uint8_t all_phys = connection->le_phy_update_all_phys; 4758 connection->le_phy_update_all_phys = 0xff; 4759 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); 4760 return true; 4761 } 4762 #endif 4763 } 4764 return false; 4765 } 4766 4767 static void hci_run(void){ 4768 4769 bool done; 4770 4771 // send continuation fragments first, as they block the prepared packet buffer 4772 done = hci_run_acl_fragments(); 4773 if (done) return; 4774 4775 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4776 // send host num completed packets next as they don't require num_cmd_packets > 0 4777 if (!hci_can_send_comand_packet_transport()) return; 4778 if (hci_stack->host_completed_packets){ 4779 hci_host_num_completed_packets(); 4780 return; 4781 } 4782 #endif 4783 4784 if (!hci_can_send_command_packet_now()) return; 4785 4786 // global/non-connection oriented commands 4787 4788 4789 #ifdef ENABLE_CLASSIC 4790 // general gap classic 4791 done = hci_run_general_gap_classic(); 4792 if (done) return; 4793 #endif 4794 4795 #ifdef ENABLE_BLE 4796 // general gap le 4797 done = hci_run_general_gap_le(); 4798 if (done) return; 4799 #endif 4800 4801 // send pending HCI commands 4802 done = hci_run_general_pending_commands(); 4803 if (done) return; 4804 4805 // stack state sub statemachines 4806 hci_connection_t * connection; 4807 switch (hci_stack->state){ 4808 case HCI_STATE_INITIALIZING: 4809 hci_initializing_run(); 4810 break; 4811 4812 case HCI_STATE_HALTING: 4813 4814 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4815 switch (hci_stack->substate){ 4816 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4817 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4818 4819 #ifdef ENABLE_BLE 4820 #ifdef ENABLE_LE_CENTRAL 4821 // free whitelist entries 4822 { 4823 btstack_linked_list_iterator_t lit; 4824 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4825 while (btstack_linked_list_iterator_has_next(&lit)){ 4826 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4827 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4828 btstack_memory_whitelist_entry_free(entry); 4829 } 4830 } 4831 #endif 4832 #endif 4833 // close all open connections 4834 connection = (hci_connection_t *) hci_stack->connections; 4835 if (connection){ 4836 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4837 if (!hci_can_send_command_packet_now()) return; 4838 4839 // check state 4840 if (connection->state == SENT_DISCONNECT) return; 4841 connection->state = SENT_DISCONNECT; 4842 4843 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4844 4845 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4846 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4847 4848 // ... which would be ignored anyway as we shutdown (free) the connection now 4849 hci_shutdown_connection(connection); 4850 4851 // finally, send the disconnect command 4852 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4853 return; 4854 } 4855 4856 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4857 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4858 log_info("HCI_STATE_HALTING: wait 50 ms"); 4859 hci_stack->substate = HCI_HALTING_W4_TIMER; 4860 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4861 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4862 btstack_run_loop_add_timer(&hci_stack->timeout); 4863 break; 4864 } 4865 4866 /* fall through */ 4867 4868 case HCI_HALTING_CLOSE: 4869 log_info("HCI_STATE_HALTING, calling off"); 4870 4871 // switch mode 4872 hci_power_control_off(); 4873 4874 log_info("HCI_STATE_HALTING, emitting state"); 4875 hci_emit_state(); 4876 log_info("HCI_STATE_HALTING, done"); 4877 break; 4878 4879 case HCI_HALTING_W4_TIMER: 4880 // keep waiting 4881 4882 break; 4883 default: 4884 break; 4885 } 4886 4887 break; 4888 4889 case HCI_STATE_FALLING_ASLEEP: 4890 switch(hci_stack->substate) { 4891 case HCI_FALLING_ASLEEP_DISCONNECT: 4892 log_info("HCI_STATE_FALLING_ASLEEP"); 4893 // close all open connections 4894 connection = (hci_connection_t *) hci_stack->connections; 4895 4896 #ifdef HAVE_PLATFORM_IPHONE_OS 4897 // don't close connections, if H4 supports power management 4898 if (btstack_control_iphone_power_management_enabled()){ 4899 connection = NULL; 4900 } 4901 #endif 4902 if (connection){ 4903 4904 // send disconnect 4905 if (!hci_can_send_command_packet_now()) return; 4906 4907 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4908 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4909 4910 // send disconnected event right away - causes higher layer connections to get closed, too. 4911 hci_shutdown_connection(connection); 4912 return; 4913 } 4914 4915 if (hci_classic_supported()){ 4916 // disable page and inquiry scan 4917 if (!hci_can_send_command_packet_now()) return; 4918 4919 log_info("HCI_STATE_HALTING, disabling inq scans"); 4920 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4921 4922 // continue in next sub state 4923 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4924 break; 4925 } 4926 4927 /* fall through */ 4928 4929 case HCI_FALLING_ASLEEP_COMPLETE: 4930 log_info("HCI_STATE_HALTING, calling sleep"); 4931 #ifdef HAVE_PLATFORM_IPHONE_OS 4932 // don't actually go to sleep, if H4 supports power management 4933 if (btstack_control_iphone_power_management_enabled()){ 4934 // SLEEP MODE reached 4935 hci_stack->state = HCI_STATE_SLEEPING; 4936 hci_emit_state(); 4937 break; 4938 } 4939 #endif 4940 // switch mode 4941 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4942 hci_emit_state(); 4943 break; 4944 4945 default: 4946 break; 4947 } 4948 break; 4949 4950 default: 4951 break; 4952 } 4953 } 4954 4955 int hci_send_cmd_packet(uint8_t *packet, int size){ 4956 // house-keeping 4957 4958 #ifdef ENABLE_CLASSIC 4959 bd_addr_t addr; 4960 hci_connection_t * conn; 4961 #endif 4962 #ifdef ENABLE_LE_CENTRAL 4963 uint8_t initiator_filter_policy; 4964 #endif 4965 4966 uint16_t opcode = little_endian_read_16(packet, 0); 4967 switch (opcode) { 4968 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4969 hci_stack->loopback_mode = packet[3]; 4970 break; 4971 4972 #ifdef ENABLE_CLASSIC 4973 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4974 reverse_bd_addr(&packet[3], addr); 4975 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4976 4977 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 4978 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 4979 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 4980 return -1; 4981 } 4982 4983 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4984 if (!conn) { 4985 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4986 if (!conn) { 4987 // notify client that alloc failed 4988 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4989 return -1; // packet not sent to controller 4990 } 4991 conn->state = SEND_CREATE_CONNECTION; 4992 conn->role = HCI_ROLE_MASTER; 4993 } 4994 log_info("conn state %u", conn->state); 4995 switch (conn->state) { 4996 // if connection active exists 4997 case OPEN: 4998 // and OPEN, emit connection complete command 4999 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5000 return -1; // packet not sent to controller 5001 case RECEIVED_DISCONNECTION_COMPLETE: 5002 // create connection triggered in disconnect complete event, let's do it now 5003 break; 5004 case SEND_CREATE_CONNECTION: 5005 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5006 break; 5007 default: 5008 // otherwise, just ignore as it is already in the open process 5009 return -1; // packet not sent to controller 5010 } 5011 conn->state = SENT_CREATE_CONNECTION; 5012 5013 // track outgoing connection 5014 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5015 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5016 break; 5017 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5018 if (hci_stack->link_key_db) { 5019 reverse_bd_addr(&packet[3], addr); 5020 hci_stack->link_key_db->delete_link_key(addr); 5021 } 5022 break; 5023 5024 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5025 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5026 // setup_synchronous_connection? Voice setting at offset 22 5027 // TODO: compare to current setting if sco connection already active 5028 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5029 break; 5030 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5031 // accept_synchronus_connection? Voice setting at offset 18 5032 // TODO: compare to current setting if sco connection already active 5033 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5034 break; 5035 #endif 5036 #endif 5037 5038 #ifdef ENABLE_BLE 5039 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5040 hci_stack->le_random_address_set = 1; 5041 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5042 break; 5043 #ifdef ENABLE_LE_PERIPHERAL 5044 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5045 hci_stack->le_advertisements_active = packet[3] != 0; 5046 break; 5047 #endif 5048 #ifdef ENABLE_LE_CENTRAL 5049 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5050 // white list used? 5051 initiator_filter_policy = packet[7]; 5052 switch (initiator_filter_policy) { 5053 case 0: 5054 // whitelist not used 5055 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5056 break; 5057 case 1: 5058 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5059 break; 5060 default: 5061 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5062 break; 5063 } 5064 // track outgoing connection 5065 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5066 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5067 break; 5068 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5069 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5070 break; 5071 #endif 5072 #endif 5073 default: 5074 break; 5075 } 5076 5077 hci_stack->num_cmd_packets--; 5078 5079 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5080 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5081 } 5082 5083 // disconnect because of security block 5084 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5085 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5086 if (!connection) return; 5087 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5088 } 5089 5090 5091 // Configure Secure Simple Pairing 5092 5093 #ifdef ENABLE_CLASSIC 5094 5095 // enable will enable SSP during init 5096 void gap_ssp_set_enable(int enable){ 5097 hci_stack->ssp_enable = enable; 5098 } 5099 5100 static int hci_local_ssp_activated(void){ 5101 return gap_ssp_supported() && hci_stack->ssp_enable; 5102 } 5103 5104 // if set, BTstack will respond to io capability request using authentication requirement 5105 void gap_ssp_set_io_capability(int io_capability){ 5106 hci_stack->ssp_io_capability = io_capability; 5107 } 5108 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5109 hci_stack->ssp_authentication_requirement = authentication_requirement; 5110 } 5111 5112 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5113 void gap_ssp_set_auto_accept(int auto_accept){ 5114 hci_stack->ssp_auto_accept = auto_accept; 5115 } 5116 5117 void gap_secure_connections_enable(bool enable){ 5118 hci_stack->secure_connections_enable = enable; 5119 } 5120 5121 #endif 5122 5123 // va_list part of hci_send_cmd 5124 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5125 if (!hci_can_send_command_packet_now()){ 5126 log_error("hci_send_cmd called but cannot send packet now"); 5127 return 0; 5128 } 5129 5130 // for HCI INITIALIZATION 5131 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5132 hci_stack->last_cmd_opcode = cmd->opcode; 5133 5134 hci_reserve_packet_buffer(); 5135 uint8_t * packet = hci_stack->hci_packet_buffer; 5136 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5137 int err = hci_send_cmd_packet(packet, size); 5138 5139 // release packet buffer on error or for synchronous transport implementations 5140 if ((err < 0) || hci_transport_synchronous()){ 5141 hci_release_packet_buffer(); 5142 hci_emit_transport_packet_sent(); 5143 } 5144 5145 return err; 5146 } 5147 5148 /** 5149 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5150 */ 5151 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5152 va_list argptr; 5153 va_start(argptr, cmd); 5154 int res = hci_send_cmd_va_arg(cmd, argptr); 5155 va_end(argptr); 5156 return res; 5157 } 5158 5159 // Create various non-HCI events. 5160 // TODO: generalize, use table similar to hci_create_command 5161 5162 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5163 // dump packet 5164 if (dump) { 5165 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5166 } 5167 5168 // dispatch to all event handlers 5169 btstack_linked_list_iterator_t it; 5170 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5171 while (btstack_linked_list_iterator_has_next(&it)){ 5172 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5173 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5174 } 5175 } 5176 5177 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5178 if (!hci_stack->acl_packet_handler) return; 5179 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5180 } 5181 5182 #ifdef ENABLE_CLASSIC 5183 static void hci_notify_if_sco_can_send_now(void){ 5184 // notify SCO sender if waiting 5185 if (!hci_stack->sco_waiting_for_can_send_now) return; 5186 if (hci_can_send_sco_packet_now()){ 5187 hci_stack->sco_waiting_for_can_send_now = 0; 5188 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5189 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5190 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5191 } 5192 } 5193 5194 // parsing end emitting has been merged to reduce code size 5195 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5196 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5197 5198 uint8_t * eir_data; 5199 ad_context_t context; 5200 const uint8_t * name; 5201 uint8_t name_len; 5202 5203 if (size < 3) return; 5204 5205 int event_type = hci_event_packet_get_type(packet); 5206 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5207 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5208 5209 switch (event_type){ 5210 case HCI_EVENT_INQUIRY_RESULT: 5211 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5212 if (size != (3 + (num_responses * 14))) return; 5213 break; 5214 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5215 if (size != 257) return; 5216 if (num_responses != 1) return; 5217 break; 5218 default: 5219 return; 5220 } 5221 5222 // event[1] is set at the end 5223 int i; 5224 for (i=0; i<num_responses;i++){ 5225 memset(event, 0, sizeof(event)); 5226 event[0] = GAP_EVENT_INQUIRY_RESULT; 5227 uint8_t event_size = 18; // if name is not set by EIR 5228 5229 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5230 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5231 (void)memcpy(&event[9], 5232 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5233 3); // class of device 5234 (void)memcpy(&event[12], 5235 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5236 2); // clock offset 5237 5238 switch (event_type){ 5239 case HCI_EVENT_INQUIRY_RESULT: 5240 // 14,15,16,17 = 0, size 18 5241 break; 5242 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5243 event[14] = 1; 5244 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5245 // 16,17 = 0, size 18 5246 break; 5247 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5248 event[14] = 1; 5249 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5250 // EIR packets only contain a single inquiry response 5251 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5252 name = NULL; 5253 // Iterate over EIR data 5254 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5255 uint8_t data_type = ad_iterator_get_data_type(&context); 5256 uint8_t data_size = ad_iterator_get_data_len(&context); 5257 const uint8_t * data = ad_iterator_get_data(&context); 5258 // Prefer Complete Local Name over Shortened Local Name 5259 switch (data_type){ 5260 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5261 if (name) continue; 5262 /* fall through */ 5263 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5264 name = data; 5265 name_len = data_size; 5266 break; 5267 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5268 if (data_size != 8) break; 5269 event[16] = 1; 5270 memcpy(&event[17], data, 8); 5271 break; 5272 default: 5273 break; 5274 } 5275 } 5276 if (name){ 5277 event[25] = 1; 5278 // truncate name if needed 5279 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5280 event[26] = len; 5281 (void)memcpy(&event[27], name, len); 5282 event_size += len; 5283 } 5284 break; 5285 default: 5286 return; 5287 } 5288 event[1] = event_size - 2; 5289 hci_emit_event(event, event_size, 1); 5290 } 5291 } 5292 #endif 5293 5294 void hci_emit_state(void){ 5295 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5296 uint8_t event[3]; 5297 event[0] = BTSTACK_EVENT_STATE; 5298 event[1] = sizeof(event) - 2u; 5299 event[2] = hci_stack->state; 5300 hci_emit_event(event, sizeof(event), 1); 5301 } 5302 5303 #ifdef ENABLE_CLASSIC 5304 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5305 uint8_t event[13]; 5306 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5307 event[1] = sizeof(event) - 2; 5308 event[2] = status; 5309 little_endian_store_16(event, 3, con_handle); 5310 reverse_bd_addr(address, &event[5]); 5311 event[11] = 1; // ACL connection 5312 event[12] = 0; // encryption disabled 5313 hci_emit_event(event, sizeof(event), 1); 5314 } 5315 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5316 if (disable_l2cap_timeouts) return; 5317 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5318 uint8_t event[4]; 5319 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5320 event[1] = sizeof(event) - 2; 5321 little_endian_store_16(event, 2, conn->con_handle); 5322 hci_emit_event(event, sizeof(event), 1); 5323 } 5324 #endif 5325 5326 #ifdef ENABLE_BLE 5327 #ifdef ENABLE_LE_CENTRAL 5328 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){ 5329 uint8_t event[21]; 5330 event[0] = HCI_EVENT_LE_META; 5331 event[1] = sizeof(event) - 2u; 5332 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5333 event[3] = status; 5334 little_endian_store_16(event, 4, con_handle); 5335 event[6] = 0; // TODO: role 5336 event[7] = address_type; 5337 reverse_bd_addr(address, &event[8]); 5338 little_endian_store_16(event, 14, 0); // interval 5339 little_endian_store_16(event, 16, 0); // latency 5340 little_endian_store_16(event, 18, 0); // supervision timeout 5341 event[20] = 0; // master clock accuracy 5342 hci_emit_event(event, sizeof(event), 1); 5343 } 5344 #endif 5345 #endif 5346 5347 static void hci_emit_transport_packet_sent(void){ 5348 // notify upper stack that it might be possible to send again 5349 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5350 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5351 } 5352 5353 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5354 uint8_t event[6]; 5355 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5356 event[1] = sizeof(event) - 2u; 5357 event[2] = 0; // status = OK 5358 little_endian_store_16(event, 3, con_handle); 5359 event[5] = reason; 5360 hci_emit_event(event, sizeof(event), 1); 5361 } 5362 5363 static void hci_emit_nr_connections_changed(void){ 5364 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5365 uint8_t event[3]; 5366 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5367 event[1] = sizeof(event) - 2u; 5368 event[2] = nr_hci_connections(); 5369 hci_emit_event(event, sizeof(event), 1); 5370 } 5371 5372 static void hci_emit_hci_open_failed(void){ 5373 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5374 uint8_t event[2]; 5375 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5376 event[1] = sizeof(event) - 2u; 5377 hci_emit_event(event, sizeof(event), 1); 5378 } 5379 5380 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5381 log_info("hci_emit_dedicated_bonding_result %u ", status); 5382 uint8_t event[9]; 5383 int pos = 0; 5384 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5385 event[pos++] = sizeof(event) - 2u; 5386 event[pos++] = status; 5387 reverse_bd_addr(address, &event[pos]); 5388 hci_emit_event(event, sizeof(event), 1); 5389 } 5390 5391 5392 #ifdef ENABLE_CLASSIC 5393 5394 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5395 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5396 uint8_t event[5]; 5397 int pos = 0; 5398 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5399 event[pos++] = sizeof(event) - 2; 5400 little_endian_store_16(event, 2, con_handle); 5401 pos += 2; 5402 event[pos++] = level; 5403 hci_emit_event(event, sizeof(event), 1); 5404 } 5405 5406 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5407 if (!connection) return LEVEL_0; 5408 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5409 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5410 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5411 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5412 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5413 // LEVEL 4 always requires 128 bit encrytion key size 5414 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5415 security_level = LEVEL_3; 5416 } 5417 return security_level; 5418 } 5419 5420 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5421 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5422 uint8_t event[3]; 5423 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5424 event[1] = sizeof(event) - 2; 5425 event[2] = enabled; 5426 hci_emit_event(event, sizeof(event), 1); 5427 } 5428 5429 // query if remote side supports eSCO 5430 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5431 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5432 if (!connection) return 0; 5433 return (connection->remote_supported_features[0] & 1) != 0; 5434 } 5435 5436 static bool hci_ssp_supported(hci_connection_t * connection){ 5437 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5438 return (connection->bonding_flags & mask) == mask; 5439 } 5440 5441 // query if remote side supports SSP 5442 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5443 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5444 if (!connection) return 0; 5445 return hci_ssp_supported(connection) ? 1 : 0; 5446 } 5447 5448 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5449 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5450 } 5451 5452 // GAP API 5453 /** 5454 * @bbrief enable/disable bonding. default is enabled 5455 * @praram enabled 5456 */ 5457 void gap_set_bondable_mode(int enable){ 5458 hci_stack->bondable = enable ? 1 : 0; 5459 } 5460 /** 5461 * @brief Get bondable mode. 5462 * @return 1 if bondable 5463 */ 5464 int gap_get_bondable_mode(void){ 5465 return hci_stack->bondable; 5466 } 5467 5468 /** 5469 * @brief map link keys to security levels 5470 */ 5471 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5472 switch (link_key_type){ 5473 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5474 return LEVEL_4; 5475 case COMBINATION_KEY: 5476 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5477 return LEVEL_3; 5478 default: 5479 return LEVEL_2; 5480 } 5481 } 5482 5483 /** 5484 * @brief map link keys to secure connection yes/no 5485 */ 5486 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5487 switch (link_key_type){ 5488 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5489 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5490 return 1; 5491 default: 5492 return 0; 5493 } 5494 } 5495 5496 /** 5497 * @brief map link keys to authenticated 5498 */ 5499 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5500 switch (link_key_type){ 5501 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5502 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5503 return 1; 5504 default: 5505 return 0; 5506 } 5507 } 5508 5509 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5510 log_info("gap_mitm_protection_required_for_security_level %u", level); 5511 return level > LEVEL_2; 5512 } 5513 5514 /** 5515 * @brief get current security level 5516 */ 5517 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5518 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5519 if (!connection) return LEVEL_0; 5520 return gap_security_level_for_connection(connection); 5521 } 5522 5523 /** 5524 * @brief request connection to device to 5525 * @result GAP_AUTHENTICATION_RESULT 5526 */ 5527 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5528 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5529 if (!connection){ 5530 hci_emit_security_level(con_handle, LEVEL_0); 5531 return; 5532 } 5533 5534 btstack_assert(hci_is_le_connection(connection) == false); 5535 5536 // 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) 5537 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5538 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5539 requested_level = LEVEL_4; 5540 } 5541 5542 gap_security_level_t current_level = gap_security_level(con_handle); 5543 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5544 requested_level, connection->requested_security_level, current_level); 5545 5546 // authentication active if authentication request was sent or planned level > 0 5547 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5548 if (authentication_active){ 5549 // authentication already active 5550 if (connection->requested_security_level < requested_level){ 5551 // increase requested level as new level is higher 5552 // TODO: handle re-authentication when done 5553 connection->requested_security_level = requested_level; 5554 } 5555 } else { 5556 // no request active, notify if security sufficient 5557 if (requested_level <= current_level){ 5558 hci_emit_security_level(con_handle, current_level); 5559 return; 5560 } 5561 5562 // store request 5563 connection->requested_security_level = requested_level; 5564 5565 // start to authenticate connection 5566 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5567 hci_run(); 5568 } 5569 } 5570 5571 /** 5572 * @brief start dedicated bonding with device. disconnect after bonding 5573 * @param device 5574 * @param request MITM protection 5575 * @result GAP_DEDICATED_BONDING_COMPLETE 5576 */ 5577 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5578 5579 // create connection state machine 5580 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5581 5582 if (!connection){ 5583 return BTSTACK_MEMORY_ALLOC_FAILED; 5584 } 5585 5586 // delete linkn key 5587 gap_drop_link_key_for_bd_addr(device); 5588 5589 // configure LEVEL_2/3, dedicated bonding 5590 connection->state = SEND_CREATE_CONNECTION; 5591 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5592 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5593 connection->bonding_flags = BONDING_DEDICATED; 5594 5595 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5596 5597 // handle: connnection failure (connection complete != ok) 5598 // handle: authentication failure 5599 // handle: disconnect on done 5600 5601 hci_run(); 5602 5603 return 0; 5604 } 5605 #endif 5606 5607 void gap_set_local_name(const char * local_name){ 5608 hci_stack->local_name = local_name; 5609 } 5610 5611 5612 #ifdef ENABLE_BLE 5613 5614 #ifdef ENABLE_LE_CENTRAL 5615 void gap_start_scan(void){ 5616 hci_stack->le_scanning_enabled = true; 5617 hci_run(); 5618 } 5619 5620 void gap_stop_scan(void){ 5621 hci_stack->le_scanning_enabled = false; 5622 hci_run(); 5623 } 5624 5625 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5626 hci_stack->le_scan_type = scan_type; 5627 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5628 hci_stack->le_scan_interval = scan_interval; 5629 hci_stack->le_scan_window = scan_window; 5630 hci_stack->le_scanning_param_update = true; 5631 hci_run(); 5632 } 5633 5634 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5635 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5636 } 5637 5638 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5639 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5640 if (!conn){ 5641 // disallow if le connection is already outgoing 5642 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5643 log_error("le connection already active"); 5644 return ERROR_CODE_COMMAND_DISALLOWED; 5645 } 5646 5647 log_info("gap_connect: no connection exists yet, creating context"); 5648 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5649 if (!conn){ 5650 // notify client that alloc failed 5651 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5652 log_info("gap_connect: failed to alloc hci_connection_t"); 5653 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5654 } 5655 5656 // set le connecting state 5657 if (hci_is_le_connection_type(addr_type)){ 5658 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5659 } 5660 5661 conn->state = SEND_CREATE_CONNECTION; 5662 log_info("gap_connect: send create connection next"); 5663 hci_run(); 5664 return ERROR_CODE_SUCCESS; 5665 } 5666 5667 if (!hci_is_le_connection(conn) || 5668 (conn->state == SEND_CREATE_CONNECTION) || 5669 (conn->state == SENT_CREATE_CONNECTION)) { 5670 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5671 log_error("gap_connect: classic connection or connect is already being created"); 5672 return GATT_CLIENT_IN_WRONG_STATE; 5673 } 5674 5675 // check if connection was just disconnected 5676 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5677 log_info("gap_connect: send create connection (again)"); 5678 conn->state = SEND_CREATE_CONNECTION; 5679 hci_run(); 5680 return ERROR_CODE_SUCCESS; 5681 } 5682 5683 log_info("gap_connect: context exists with state %u", conn->state); 5684 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5685 hci_run(); 5686 return ERROR_CODE_SUCCESS; 5687 } 5688 5689 // @assumption: only a single outgoing LE Connection exists 5690 static hci_connection_t * gap_get_outgoing_connection(void){ 5691 btstack_linked_item_t *it; 5692 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5693 hci_connection_t * conn = (hci_connection_t *) it; 5694 if (!hci_is_le_connection(conn)) continue; 5695 switch (conn->state){ 5696 case SEND_CREATE_CONNECTION: 5697 case SENT_CREATE_CONNECTION: 5698 case SENT_CANCEL_CONNECTION: 5699 return conn; 5700 default: 5701 break; 5702 }; 5703 } 5704 return NULL; 5705 } 5706 5707 uint8_t gap_connect_cancel(void){ 5708 hci_connection_t * conn = gap_get_outgoing_connection(); 5709 if (!conn) return 0; 5710 switch (conn->state){ 5711 case SEND_CREATE_CONNECTION: 5712 // skip sending create connection and emit event instead 5713 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5714 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5715 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5716 btstack_memory_hci_connection_free( conn ); 5717 break; 5718 case SENT_CREATE_CONNECTION: 5719 // request to send cancel connection 5720 conn->state = SEND_CANCEL_CONNECTION; 5721 hci_run(); 5722 break; 5723 default: 5724 break; 5725 } 5726 return 0; 5727 } 5728 #endif 5729 5730 #ifdef ENABLE_LE_CENTRAL 5731 /** 5732 * @brief Set connection parameters for outgoing connections 5733 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5734 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5735 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5736 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5737 * @param conn_latency, default: 4 5738 * @param supervision_timeout (unit: 10ms), default: 720 ms 5739 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5740 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5741 */ 5742 5743 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5744 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5745 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5746 hci_stack->le_connection_scan_interval = conn_scan_interval; 5747 hci_stack->le_connection_scan_window = conn_scan_window; 5748 hci_stack->le_connection_interval_min = conn_interval_min; 5749 hci_stack->le_connection_interval_max = conn_interval_max; 5750 hci_stack->le_connection_latency = conn_latency; 5751 hci_stack->le_supervision_timeout = supervision_timeout; 5752 hci_stack->le_minimum_ce_length = min_ce_length; 5753 hci_stack->le_maximum_ce_length = max_ce_length; 5754 } 5755 #endif 5756 5757 /** 5758 * @brief Updates the connection parameters for a given LE connection 5759 * @param handle 5760 * @param conn_interval_min (unit: 1.25ms) 5761 * @param conn_interval_max (unit: 1.25ms) 5762 * @param conn_latency 5763 * @param supervision_timeout (unit: 10ms) 5764 * @returns 0 if ok 5765 */ 5766 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5767 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5768 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5769 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5770 connection->le_conn_interval_min = conn_interval_min; 5771 connection->le_conn_interval_max = conn_interval_max; 5772 connection->le_conn_latency = conn_latency; 5773 connection->le_supervision_timeout = supervision_timeout; 5774 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5775 hci_run(); 5776 return 0; 5777 } 5778 5779 /** 5780 * @brief Request an update of the connection parameter for a given LE connection 5781 * @param handle 5782 * @param conn_interval_min (unit: 1.25ms) 5783 * @param conn_interval_max (unit: 1.25ms) 5784 * @param conn_latency 5785 * @param supervision_timeout (unit: 10ms) 5786 * @returns 0 if ok 5787 */ 5788 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5789 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5790 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5791 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5792 connection->le_conn_interval_min = conn_interval_min; 5793 connection->le_conn_interval_max = conn_interval_max; 5794 connection->le_conn_latency = conn_latency; 5795 connection->le_supervision_timeout = supervision_timeout; 5796 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5797 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5798 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5799 return 0; 5800 } 5801 5802 #ifdef ENABLE_LE_PERIPHERAL 5803 5804 /** 5805 * @brief Set Advertisement Data 5806 * @param advertising_data_length 5807 * @param advertising_data (max 31 octets) 5808 * @note data is not copied, pointer has to stay valid 5809 */ 5810 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5811 hci_stack->le_advertisements_data_len = advertising_data_length; 5812 hci_stack->le_advertisements_data = advertising_data; 5813 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5814 hci_run(); 5815 } 5816 5817 /** 5818 * @brief Set Scan Response Data 5819 * @param advertising_data_length 5820 * @param advertising_data (max 31 octets) 5821 * @note data is not copied, pointer has to stay valid 5822 */ 5823 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5824 hci_stack->le_scan_response_data_len = scan_response_data_length; 5825 hci_stack->le_scan_response_data = scan_response_data; 5826 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5827 hci_run(); 5828 } 5829 5830 /** 5831 * @brief Set Advertisement Parameters 5832 * @param adv_int_min 5833 * @param adv_int_max 5834 * @param adv_type 5835 * @param direct_address_type 5836 * @param direct_address 5837 * @param channel_map 5838 * @param filter_policy 5839 * 5840 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5841 */ 5842 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5843 uint8_t direct_address_typ, bd_addr_t direct_address, 5844 uint8_t channel_map, uint8_t filter_policy) { 5845 5846 hci_stack->le_advertisements_interval_min = adv_int_min; 5847 hci_stack->le_advertisements_interval_max = adv_int_max; 5848 hci_stack->le_advertisements_type = adv_type; 5849 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5850 hci_stack->le_advertisements_channel_map = channel_map; 5851 hci_stack->le_advertisements_filter_policy = filter_policy; 5852 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5853 6); 5854 5855 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5856 hci_run(); 5857 } 5858 5859 /** 5860 * @brief Enable/Disable Advertisements 5861 * @param enabled 5862 */ 5863 void gap_advertisements_enable(int enabled){ 5864 hci_stack->le_advertisements_enabled = enabled != 0; 5865 hci_update_advertisements_enabled_for_current_roles(); 5866 hci_run(); 5867 } 5868 5869 #endif 5870 5871 void hci_le_set_own_address_type(uint8_t own_address_type){ 5872 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5873 if (own_address_type == hci_stack->le_own_addr_type) return; 5874 hci_stack->le_own_addr_type = own_address_type; 5875 5876 #ifdef ENABLE_LE_PERIPHERAL 5877 // update advertisement parameters, too 5878 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5879 hci_run(); 5880 #endif 5881 #ifdef ENABLE_LE_CENTRAL 5882 // note: we don't update scan parameters or modify ongoing connection attempts 5883 #endif 5884 } 5885 5886 #endif 5887 5888 uint8_t gap_disconnect(hci_con_handle_t handle){ 5889 hci_connection_t * conn = hci_connection_for_handle(handle); 5890 if (!conn){ 5891 hci_emit_disconnection_complete(handle, 0); 5892 return 0; 5893 } 5894 // ignore if already disconnected 5895 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5896 return 0; 5897 } 5898 conn->state = SEND_DISCONNECT; 5899 hci_run(); 5900 return 0; 5901 } 5902 5903 int gap_read_rssi(hci_con_handle_t con_handle){ 5904 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5905 if (hci_connection == NULL) return 0; 5906 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5907 hci_run(); 5908 return 1; 5909 } 5910 5911 /** 5912 * @brief Get connection type 5913 * @param con_handle 5914 * @result connection_type 5915 */ 5916 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5917 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5918 if (!conn) return GAP_CONNECTION_INVALID; 5919 switch (conn->address_type){ 5920 case BD_ADDR_TYPE_LE_PUBLIC: 5921 case BD_ADDR_TYPE_LE_RANDOM: 5922 return GAP_CONNECTION_LE; 5923 case BD_ADDR_TYPE_SCO: 5924 return GAP_CONNECTION_SCO; 5925 case BD_ADDR_TYPE_ACL: 5926 return GAP_CONNECTION_ACL; 5927 default: 5928 return GAP_CONNECTION_INVALID; 5929 } 5930 } 5931 5932 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5933 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5934 if (!conn) return HCI_ROLE_INVALID; 5935 return (hci_role_t) conn->role; 5936 } 5937 5938 5939 #ifdef ENABLE_CLASSIC 5940 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5941 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5942 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5943 conn->request_role = role; 5944 hci_run(); 5945 return ERROR_CODE_SUCCESS; 5946 } 5947 #endif 5948 5949 #ifdef ENABLE_BLE 5950 5951 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){ 5952 hci_connection_t * conn = hci_connection_for_handle(con_handle); 5953 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5954 5955 conn->le_phy_update_all_phys = all_phys; 5956 conn->le_phy_update_tx_phys = tx_phys; 5957 conn->le_phy_update_rx_phys = rx_phys; 5958 conn->le_phy_update_phy_options = phy_options; 5959 5960 hci_run(); 5961 5962 return 0; 5963 } 5964 5965 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5966 // check if already in list 5967 btstack_linked_list_iterator_t it; 5968 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5969 while (btstack_linked_list_iterator_has_next(&it)) { 5970 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5971 if (entry->address_type != address_type) { 5972 continue; 5973 } 5974 if (memcmp(entry->address, address, 6) != 0) { 5975 continue; 5976 } 5977 // disallow if already scheduled to add 5978 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5979 return ERROR_CODE_COMMAND_DISALLOWED; 5980 } 5981 // still on controller, but scheduled to remove -> re-add 5982 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5983 return ERROR_CODE_SUCCESS; 5984 } 5985 // alloc and add to list 5986 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5987 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5988 entry->address_type = address_type; 5989 (void)memcpy(entry->address, address, 6); 5990 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5991 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5992 return ERROR_CODE_SUCCESS; 5993 } 5994 5995 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5996 btstack_linked_list_iterator_t it; 5997 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5998 while (btstack_linked_list_iterator_has_next(&it)){ 5999 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6000 if (entry->address_type != address_type) { 6001 continue; 6002 } 6003 if (memcmp(entry->address, address, 6) != 0) { 6004 continue; 6005 } 6006 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6007 // remove from controller if already present 6008 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6009 } else { 6010 // directly remove entry from whitelist 6011 btstack_linked_list_iterator_remove(&it); 6012 btstack_memory_whitelist_entry_free(entry); 6013 } 6014 return ERROR_CODE_SUCCESS; 6015 } 6016 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6017 } 6018 6019 static void hci_whitelist_clear(void){ 6020 btstack_linked_list_iterator_t it; 6021 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6022 while (btstack_linked_list_iterator_has_next(&it)){ 6023 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6024 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6025 // remove from controller if already present 6026 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6027 continue; 6028 } 6029 // directly remove entry from whitelist 6030 btstack_linked_list_iterator_remove(&it); 6031 btstack_memory_whitelist_entry_free(entry); 6032 } 6033 } 6034 6035 /** 6036 * @brief Clear Whitelist 6037 * @returns 0 if ok 6038 */ 6039 uint8_t gap_whitelist_clear(void){ 6040 hci_whitelist_clear(); 6041 hci_run(); 6042 return ERROR_CODE_SUCCESS; 6043 } 6044 6045 /** 6046 * @brief Add Device to Whitelist 6047 * @param address_typ 6048 * @param address 6049 * @returns 0 if ok 6050 */ 6051 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6052 uint8_t status = hci_whitelist_add(address_type, address); 6053 if (status){ 6054 return status; 6055 } 6056 hci_run(); 6057 return ERROR_CODE_SUCCESS; 6058 } 6059 6060 /** 6061 * @brief Remove Device from Whitelist 6062 * @param address_typ 6063 * @param address 6064 * @returns 0 if ok 6065 */ 6066 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6067 uint8_t status = hci_whitelist_remove(address_type, address); 6068 if (status){ 6069 return status; 6070 } 6071 hci_run(); 6072 return ERROR_CODE_SUCCESS; 6073 } 6074 6075 #ifdef ENABLE_LE_CENTRAL 6076 /** 6077 * @brief Connect with Whitelist 6078 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6079 * @returns - if ok 6080 */ 6081 uint8_t gap_connect_with_whitelist(void){ 6082 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6083 return ERROR_CODE_COMMAND_DISALLOWED; 6084 } 6085 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6086 hci_run(); 6087 return ERROR_CODE_SUCCESS; 6088 } 6089 6090 /** 6091 * @brief Auto Connection Establishment - Start Connecting to device 6092 * @param address_typ 6093 * @param address 6094 * @returns 0 if ok 6095 */ 6096 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6097 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6098 return ERROR_CODE_COMMAND_DISALLOWED; 6099 } 6100 6101 uint8_t status = hci_whitelist_add(address_type, address); 6102 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6103 return status; 6104 } 6105 6106 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6107 6108 hci_run(); 6109 return ERROR_CODE_SUCCESS; 6110 } 6111 6112 /** 6113 * @brief Auto Connection Establishment - Stop Connecting to device 6114 * @param address_typ 6115 * @param address 6116 * @returns 0 if ok 6117 */ 6118 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6119 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6120 return ERROR_CODE_COMMAND_DISALLOWED; 6121 } 6122 6123 hci_whitelist_remove(address_type, address); 6124 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6125 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6126 } 6127 hci_run(); 6128 return 0; 6129 } 6130 6131 /** 6132 * @brief Auto Connection Establishment - Stop everything 6133 * @note Convenience function to stop all active auto connection attempts 6134 */ 6135 uint8_t gap_auto_connection_stop_all(void){ 6136 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6137 return ERROR_CODE_COMMAND_DISALLOWED; 6138 } 6139 hci_whitelist_clear(); 6140 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6141 hci_run(); 6142 return ERROR_CODE_SUCCESS; 6143 } 6144 6145 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6146 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6147 if (!conn) return 0; 6148 return conn->le_connection_interval; 6149 } 6150 #endif 6151 #endif 6152 6153 #ifdef ENABLE_CLASSIC 6154 /** 6155 * @brief Set Extended Inquiry Response data 6156 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6157 * @note has to be done before stack starts up 6158 */ 6159 void gap_set_extended_inquiry_response(const uint8_t * data){ 6160 hci_stack->eir_data = data; 6161 } 6162 6163 /** 6164 * @brief Start GAP Classic Inquiry 6165 * @param duration in 1.28s units 6166 * @return 0 if ok 6167 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6168 */ 6169 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6170 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6171 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6172 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6173 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6174 } 6175 hci_stack->inquiry_state = duration_in_1280ms_units; 6176 hci_run(); 6177 return 0; 6178 } 6179 6180 /** 6181 * @brief Stop GAP Classic Inquiry 6182 * @returns 0 if ok 6183 */ 6184 int gap_inquiry_stop(void){ 6185 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6186 // emit inquiry complete event, before it even started 6187 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6188 hci_emit_event(event, sizeof(event), 1); 6189 return 0; 6190 } 6191 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6192 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6193 hci_run(); 6194 return 0; 6195 } 6196 6197 void gap_inquiry_set_lap(uint32_t lap){ 6198 hci_stack->inquiry_lap = lap; 6199 } 6200 6201 6202 /** 6203 * @brief Remote Name Request 6204 * @param addr 6205 * @param page_scan_repetition_mode 6206 * @param clock_offset only used when bit 15 is set 6207 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6208 */ 6209 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6210 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6211 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6212 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6213 hci_stack->remote_name_clock_offset = clock_offset; 6214 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6215 hci_run(); 6216 return 0; 6217 } 6218 6219 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6220 hci_stack->gap_pairing_state = state; 6221 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6222 hci_run(); 6223 return 0; 6224 } 6225 6226 /** 6227 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6228 * @param addr 6229 * @param pin_data 6230 * @param pin_len 6231 * @return 0 if ok 6232 */ 6233 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6234 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6235 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6236 hci_stack->gap_pairing_pin_len = pin_len; 6237 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6238 } 6239 6240 /** 6241 * @brief Legacy Pairing Pin Code Response 6242 * @param addr 6243 * @param pin 6244 * @return 0 if ok 6245 */ 6246 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6247 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6248 } 6249 6250 /** 6251 * @brief Abort Legacy Pairing 6252 * @param addr 6253 * @param pin 6254 * @return 0 if ok 6255 */ 6256 int gap_pin_code_negative(bd_addr_t addr){ 6257 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6258 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6259 } 6260 6261 /** 6262 * @brief SSP Passkey Response 6263 * @param addr 6264 * @param passkey 6265 * @return 0 if ok 6266 */ 6267 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6268 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6269 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6270 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6271 } 6272 6273 /** 6274 * @brief Abort SSP Passkey Entry/Pairing 6275 * @param addr 6276 * @param pin 6277 * @return 0 if ok 6278 */ 6279 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6280 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6281 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6282 } 6283 6284 /** 6285 * @brief Accept SSP Numeric Comparison 6286 * @param addr 6287 * @param passkey 6288 * @return 0 if ok 6289 */ 6290 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6291 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6292 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6293 } 6294 6295 /** 6296 * @brief Abort SSP Numeric Comparison/Pairing 6297 * @param addr 6298 * @param pin 6299 * @return 0 if ok 6300 */ 6301 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6302 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6303 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6304 } 6305 6306 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6307 6308 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6309 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6310 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6311 connectionSetAuthenticationFlags(conn, flag); 6312 hci_run(); 6313 return ERROR_CODE_SUCCESS; 6314 } 6315 6316 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6317 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_REPLY); 6318 } 6319 6320 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6321 return gap_set_auth_flag_and_run(addr, SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6322 } 6323 #endif 6324 6325 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6326 /** 6327 * @brief Report Remote OOB Data 6328 * @param bd_addr 6329 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6330 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6331 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6332 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6333 */ 6334 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){ 6335 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6336 if (connection == NULL) { 6337 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6338 } 6339 connection->classic_oob_c_192 = c_192; 6340 connection->classic_oob_r_192 = r_192; 6341 connection->classic_oob_c_256 = c_256; 6342 connection->classic_oob_r_256 = r_256; 6343 return ERROR_CODE_SUCCESS; 6344 } 6345 /** 6346 * @brief Generate new OOB data 6347 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6348 */ 6349 void gap_ssp_generate_oob_data(void){ 6350 hci_stack->classic_read_local_oob_data = true; 6351 hci_run(); 6352 } 6353 6354 #endif 6355 6356 /** 6357 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6358 * @param inquiry_mode see bluetooth_defines.h 6359 */ 6360 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6361 hci_stack->inquiry_mode = inquiry_mode; 6362 } 6363 6364 /** 6365 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6366 */ 6367 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6368 hci_stack->sco_voice_setting = voice_setting; 6369 } 6370 6371 /** 6372 * @brief Get SCO Voice Setting 6373 * @return current voice setting 6374 */ 6375 uint16_t hci_get_sco_voice_setting(void){ 6376 return hci_stack->sco_voice_setting; 6377 } 6378 6379 static int hci_have_usb_transport(void){ 6380 if (!hci_stack->hci_transport) return 0; 6381 const char * transport_name = hci_stack->hci_transport->name; 6382 if (!transport_name) return 0; 6383 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6384 } 6385 6386 /** @brief Get SCO packet length for current SCO Voice setting 6387 * @note Using SCO packets of the exact length is required for USB transfer 6388 * @return Length of SCO packets in bytes (not audio frames) 6389 */ 6390 int hci_get_sco_packet_length(void){ 6391 int sco_packet_length = 0; 6392 6393 #ifdef ENABLE_SCO_OVER_HCI 6394 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6395 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6396 6397 if (hci_have_usb_transport()){ 6398 // see Core Spec for H2 USB Transfer. 6399 // 3 byte SCO header + 24 bytes per connection 6400 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6401 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6402 } else { 6403 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6404 sco_packet_length = 3 + 60 * multiplier; 6405 // assert that it still fits inside an SCO buffer 6406 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6407 sco_packet_length = 3 + 60; 6408 } 6409 } 6410 #endif 6411 6412 #ifdef HAVE_SCO_TRANSPORT 6413 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6414 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6415 sco_packet_length = 3 + 60 * multiplier; 6416 #endif 6417 return sco_packet_length; 6418 } 6419 6420 /** 6421 * @brief Sets the master/slave policy 6422 * @param policy (0: attempt to become master, 1: let connecting device decide) 6423 */ 6424 void hci_set_master_slave_policy(uint8_t policy){ 6425 hci_stack->master_slave_policy = policy; 6426 } 6427 6428 #endif 6429 6430 HCI_STATE hci_get_state(void){ 6431 return hci_stack->state; 6432 } 6433 6434 #ifdef ENABLE_CLASSIC 6435 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6436 hci_stack->gap_classic_accept_callback = accept_callback; 6437 } 6438 #endif 6439 6440 /** 6441 * @brief Set callback for Bluetooth Hardware Error 6442 */ 6443 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6444 hci_stack->hardware_error_callback = fn; 6445 } 6446 6447 void hci_disconnect_all(void){ 6448 btstack_linked_list_iterator_t it; 6449 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6450 while (btstack_linked_list_iterator_has_next(&it)){ 6451 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6452 if (con->state == SENT_DISCONNECT) continue; 6453 con->state = SEND_DISCONNECT; 6454 } 6455 hci_run(); 6456 } 6457 6458 uint16_t hci_get_manufacturer(void){ 6459 return hci_stack->manufacturer; 6460 } 6461 6462 #ifdef ENABLE_BLE 6463 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6464 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6465 if (!hci_con) return NULL; 6466 return &hci_con->sm_connection; 6467 } 6468 6469 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6470 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6471 #endif 6472 6473 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6474 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6475 if (hci_connection == NULL) return 0; 6476 if (hci_is_le_connection(hci_connection)){ 6477 #ifdef ENABLE_BLE 6478 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6479 if (sm_conn->sm_connection_encrypted) { 6480 return sm_conn->sm_actual_encryption_key_size; 6481 } 6482 #endif 6483 } else { 6484 #ifdef ENABLE_CLASSIC 6485 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6486 return hci_connection->encryption_key_size; 6487 } 6488 #endif 6489 } 6490 return 0; 6491 } 6492 6493 int gap_authenticated(hci_con_handle_t con_handle){ 6494 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6495 if (hci_connection == NULL) return 0; 6496 6497 switch (hci_connection->address_type){ 6498 #ifdef ENABLE_BLE 6499 case BD_ADDR_TYPE_LE_PUBLIC: 6500 case BD_ADDR_TYPE_LE_RANDOM: 6501 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6502 return hci_connection->sm_connection.sm_connection_authenticated; 6503 #endif 6504 #ifdef ENABLE_CLASSIC 6505 case BD_ADDR_TYPE_SCO: 6506 case BD_ADDR_TYPE_ACL: 6507 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6508 #endif 6509 default: 6510 return 0; 6511 } 6512 } 6513 6514 int gap_secure_connection(hci_con_handle_t con_handle){ 6515 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6516 if (hci_connection == NULL) return 0; 6517 6518 switch (hci_connection->address_type){ 6519 #ifdef ENABLE_BLE 6520 case BD_ADDR_TYPE_LE_PUBLIC: 6521 case BD_ADDR_TYPE_LE_RANDOM: 6522 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6523 return hci_connection->sm_connection.sm_connection_sc; 6524 #endif 6525 #ifdef ENABLE_CLASSIC 6526 case BD_ADDR_TYPE_SCO: 6527 case BD_ADDR_TYPE_ACL: 6528 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6529 #endif 6530 default: 6531 return 0; 6532 } 6533 } 6534 6535 bool gap_bonded(hci_con_handle_t con_handle){ 6536 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6537 if (hci_connection == NULL) return 0; 6538 6539 #ifdef ENABLE_CLASSIC 6540 link_key_t link_key; 6541 link_key_type_t link_key_type; 6542 #endif 6543 switch (hci_connection->address_type){ 6544 #ifdef ENABLE_BLE 6545 case BD_ADDR_TYPE_LE_PUBLIC: 6546 case BD_ADDR_TYPE_LE_RANDOM: 6547 return hci_connection->sm_connection.sm_le_db_index >= 0; 6548 #endif 6549 #ifdef ENABLE_CLASSIC 6550 case BD_ADDR_TYPE_SCO: 6551 case BD_ADDR_TYPE_ACL: 6552 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6553 #endif 6554 default: 6555 return false; 6556 } 6557 } 6558 6559 #ifdef ENABLE_BLE 6560 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6561 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6562 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6563 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6564 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6565 return sm_conn->sm_connection_authorization_state; 6566 } 6567 #endif 6568 6569 #ifdef ENABLE_CLASSIC 6570 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){ 6571 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6572 if (!conn) return GAP_CONNECTION_INVALID; 6573 conn->sniff_min_interval = sniff_min_interval; 6574 conn->sniff_max_interval = sniff_max_interval; 6575 conn->sniff_attempt = sniff_attempt; 6576 conn->sniff_timeout = sniff_timeout; 6577 hci_run(); 6578 return 0; 6579 } 6580 6581 /** 6582 * @brief Exit Sniff mode 6583 * @param con_handle 6584 @ @return 0 if ok 6585 */ 6586 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6587 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6588 if (!conn) return GAP_CONNECTION_INVALID; 6589 conn->sniff_min_interval = 0xffff; 6590 hci_run(); 6591 return 0; 6592 } 6593 6594 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){ 6595 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6596 if (!conn) return GAP_CONNECTION_INVALID; 6597 conn->sniff_subrating_max_latency = max_latency; 6598 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6599 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6600 hci_run(); 6601 return ERROR_CODE_SUCCESS; 6602 } 6603 6604 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){ 6605 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6606 if (!conn) return GAP_CONNECTION_INVALID; 6607 conn->qos_service_type = service_type; 6608 conn->qos_token_rate = token_rate; 6609 conn->qos_peak_bandwidth = peak_bandwidth; 6610 conn->qos_latency = latency; 6611 conn->qos_delay_variation = delay_variation; 6612 hci_run(); 6613 return ERROR_CODE_SUCCESS; 6614 } 6615 6616 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6617 hci_stack->new_page_scan_interval = page_scan_interval; 6618 hci_stack->new_page_scan_window = page_scan_window; 6619 hci_run(); 6620 } 6621 6622 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6623 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6624 hci_run(); 6625 } 6626 6627 #endif 6628 6629 void hci_halting_defer(void){ 6630 if (hci_stack->state != HCI_STATE_HALTING) return; 6631 switch (hci_stack->substate){ 6632 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6633 case HCI_HALTING_CLOSE: 6634 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6635 break; 6636 default: 6637 break; 6638 } 6639 } 6640 6641 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6642 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6643 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6644 if (le_device_db_index >= le_device_db_max_count()) return; 6645 uint8_t offset = le_device_db_index >> 3; 6646 uint8_t mask = 1 << (le_device_db_index & 7); 6647 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6648 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6649 // note: go back to remove entries, otherwise, a remove + add will skip the add 6650 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6651 } 6652 } 6653 6654 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6655 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6656 if (le_device_db_index >= le_device_db_max_count()) return; 6657 uint8_t offset = le_device_db_index >> 3; 6658 uint8_t mask = 1 << (le_device_db_index & 7); 6659 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6660 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6661 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6662 } 6663 } 6664 6665 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6666 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6667 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6668 } 6669 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6670 // restart le resolving list update 6671 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6672 } 6673 return ERROR_CODE_SUCCESS; 6674 } 6675 #endif 6676 6677 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6678 void hci_setup_test_connections_fuzz(void){ 6679 hci_connection_t * conn; 6680 6681 // default address: 66:55:44:33:00:01 6682 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6683 6684 // setup Controller info 6685 hci_stack->num_cmd_packets = 255; 6686 hci_stack->acl_packets_total_num = 255; 6687 6688 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6689 addr[5] = 0x01; 6690 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6691 conn->con_handle = addr[5]; 6692 conn->role = HCI_ROLE_SLAVE; 6693 conn->state = RECEIVED_CONNECTION_REQUEST; 6694 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6695 6696 // setup incoming Classic SCO connection with con handle 0x0002 6697 addr[5] = 0x02; 6698 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6699 conn->con_handle = addr[5]; 6700 conn->role = HCI_ROLE_SLAVE; 6701 conn->state = RECEIVED_CONNECTION_REQUEST; 6702 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6703 6704 // setup ready Classic ACL connection with con handle 0x0003 6705 addr[5] = 0x03; 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 = OPEN; 6710 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6711 6712 // setup ready Classic SCO connection with con handle 0x0004 6713 addr[5] = 0x04; 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 = OPEN; 6718 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6719 6720 // setup ready LE ACL connection with con handle 0x005 and public address 6721 addr[5] = 0x05; 6722 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 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 conn->sm_connection.sm_connection_encrypted = 1; 6728 } 6729 6730 void hci_free_connections_fuzz(void){ 6731 btstack_linked_list_iterator_t it; 6732 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6733 while (btstack_linked_list_iterator_has_next(&it)){ 6734 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6735 btstack_linked_list_iterator_remove(&it); 6736 btstack_memory_hci_connection_free(con); 6737 } 6738 } 6739 void hci_simulate_working_fuzz(void){ 6740 hci_init_done(); 6741 hci_stack->num_cmd_packets = 255; 6742 } 6743 #endif 6744