1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #if defined(ENABLE_SCO_OVER_HCI) && defined(ENABLE_SCO_OVER_PCM) 97 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM." 98 #endif 99 100 #if defined(ENABLE_SCO_OVER_HCI) && defined(HAVE_SCO_TRANSPORT) 101 #error "SCO data can either be routed over HCI or over PCM, but not over both. Please only enable ENABLE_SCO_OVER_HCI or HAVE_SCO_TRANSPORT." 102 #endif 103 104 #define HCI_CONNECTION_TIMEOUT_MS 10000 105 106 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 107 #define HCI_RESET_RESEND_TIMEOUT_MS 200 108 #endif 109 110 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 111 #ifndef GAP_INQUIRY_MAX_NAME_LEN 112 #define GAP_INQUIRY_MAX_NAME_LEN 32 113 #endif 114 115 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 116 #define GAP_INQUIRY_DURATION_MIN 0x01 117 #define GAP_INQUIRY_DURATION_MAX 0x30 118 #define GAP_INQUIRY_STATE_IDLE 0x00 119 #define GAP_INQUIRY_STATE_W4_ACTIVE 0x80 120 #define GAP_INQUIRY_STATE_ACTIVE 0x81 121 #define GAP_INQUIRY_STATE_W2_CANCEL 0x82 122 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x83 123 124 // GAP Remote Name Request 125 #define GAP_REMOTE_NAME_STATE_IDLE 0 126 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 127 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 128 129 // GAP Pairing 130 #define GAP_PAIRING_STATE_IDLE 0 131 #define GAP_PAIRING_STATE_SEND_PIN 1 132 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 133 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 134 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 135 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 136 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 137 #define GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE 7 138 139 // prototypes 140 #ifdef ENABLE_CLASSIC 141 static void hci_update_scan_enable(void); 142 static void hci_emit_discoverable_enabled(uint8_t enabled); 143 static int hci_local_ssp_activated(void); 144 static 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 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 419 reverse_bd_addr(hci_connection->address, &event[4]); 420 event[10] = (uint8_t) ssp; 421 event[11] = (uint8_t) initiator; 422 hci_emit_event(event, sizeof(event), 1); 423 } 424 425 static void hci_pairing_complete(hci_connection_t * hci_connection, uint8_t status){ 426 hci_connection->requested_security_level = LEVEL_0; 427 if (!hci_pairing_active(hci_connection)) return; 428 hci_connection->authentication_flags &= ~AUTH_FLAG_PAIRING_ACTIVE_MASK; 429 log_info("pairing complete, status %02x", status); 430 431 uint8_t event[12]; 432 event[0] = GAP_EVENT_PAIRING_COMPLETE; 433 event[1] = 9; 434 little_endian_store_16(event, 2, (uint16_t) hci_connection->con_handle); 435 reverse_bd_addr(hci_connection->address, &event[4]); 436 event[10] = status; 437 hci_emit_event(event, sizeof(event), 1); 438 } 439 440 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 441 hci_connection_t * conn = hci_connection_for_handle(handle); 442 if (!conn) return 0; 443 return (int) hci_pairing_active(conn); 444 } 445 446 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 447 if (!hci_stack->link_key_db) return; 448 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 449 hci_stack->link_key_db->delete_link_key(addr); 450 } 451 452 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 453 if (!hci_stack->link_key_db) return; 454 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 455 hci_stack->link_key_db->put_link_key(addr, link_key, type); 456 } 457 458 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 459 if (!hci_stack->link_key_db) return false; 460 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 461 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 462 return result; 463 } 464 465 void gap_delete_all_link_keys(void){ 466 bd_addr_t addr; 467 link_key_t link_key; 468 link_key_type_t type; 469 btstack_link_key_iterator_t it; 470 int ok = gap_link_key_iterator_init(&it); 471 if (!ok) { 472 log_error("could not initialize iterator"); 473 return; 474 } 475 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 476 gap_drop_link_key_for_bd_addr(addr); 477 } 478 gap_link_key_iterator_done(&it); 479 } 480 481 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 482 if (!hci_stack->link_key_db) return 0; 483 if (!hci_stack->link_key_db->iterator_init) return 0; 484 return hci_stack->link_key_db->iterator_init(it); 485 } 486 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 487 if (!hci_stack->link_key_db) return 0; 488 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 489 } 490 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 491 if (!hci_stack->link_key_db) return; 492 hci_stack->link_key_db->iterator_done(it); 493 } 494 #endif 495 496 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 497 switch (address_type){ 498 case BD_ADDR_TYPE_LE_PUBLIC: 499 case BD_ADDR_TYPE_LE_RANDOM: 500 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 501 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 502 return true; 503 default: 504 return false; 505 } 506 } 507 508 static int hci_is_le_connection(hci_connection_t * connection){ 509 return hci_is_le_connection_type(connection->address_type); 510 } 511 512 /** 513 * count connections 514 */ 515 static int nr_hci_connections(void){ 516 int count = 0; 517 btstack_linked_item_t *it; 518 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 519 count++; 520 } 521 return count; 522 } 523 524 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 525 526 unsigned int num_packets_sent_classic = 0; 527 unsigned int num_packets_sent_le = 0; 528 529 btstack_linked_item_t *it; 530 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 531 hci_connection_t * connection = (hci_connection_t *) it; 532 if (hci_is_le_connection(connection)){ 533 num_packets_sent_le += connection->num_packets_sent; 534 } 535 if (connection->address_type == BD_ADDR_TYPE_ACL){ 536 num_packets_sent_classic += connection->num_packets_sent; 537 } 538 } 539 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 540 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 541 int free_slots_le = 0; 542 543 if (free_slots_classic < 0){ 544 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 545 return 0; 546 } 547 548 if (hci_stack->le_acl_packets_total_num){ 549 // if we have LE slots, they are used 550 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 551 if (free_slots_le < 0){ 552 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 553 return 0; 554 } 555 } else { 556 // otherwise, classic slots are used for LE, too 557 free_slots_classic -= num_packets_sent_le; 558 if (free_slots_classic < 0){ 559 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 560 return 0; 561 } 562 } 563 564 switch (address_type){ 565 case BD_ADDR_TYPE_UNKNOWN: 566 log_error("hci_number_free_acl_slots: unknown address type"); 567 return 0; 568 569 case BD_ADDR_TYPE_ACL: 570 return free_slots_classic; 571 572 default: 573 if (hci_stack->le_acl_packets_total_num){ 574 return free_slots_le; 575 } 576 return free_slots_classic; 577 } 578 } 579 580 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 581 // get connection type 582 hci_connection_t * connection = hci_connection_for_handle(con_handle); 583 if (!connection){ 584 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 585 return 0; 586 } 587 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 588 } 589 590 #ifdef ENABLE_CLASSIC 591 static int hci_number_free_sco_slots(void){ 592 unsigned int num_sco_packets_sent = 0; 593 btstack_linked_item_t *it; 594 if (hci_stack->synchronous_flow_control_enabled){ 595 // explicit flow control 596 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 597 hci_connection_t * connection = (hci_connection_t *) it; 598 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 599 num_sco_packets_sent += connection->num_packets_sent; 600 } 601 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 602 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 603 return 0; 604 } 605 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 606 } else { 607 // implicit flow control -- TODO 608 int num_ready = 0; 609 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 610 hci_connection_t * connection = (hci_connection_t *) it; 611 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 612 if (connection->sco_tx_ready == 0) continue; 613 num_ready++; 614 } 615 return num_ready; 616 } 617 } 618 #endif 619 620 // only used to send HCI Host Number Completed Packets 621 static int hci_can_send_comand_packet_transport(void){ 622 if (hci_stack->hci_packet_buffer_reserved) return 0; 623 624 // check for async hci transport implementations 625 if (hci_stack->hci_transport->can_send_packet_now){ 626 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 627 return 0; 628 } 629 } 630 return 1; 631 } 632 633 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 634 int hci_can_send_command_packet_now(void){ 635 if (hci_can_send_comand_packet_transport() == 0) return 0; 636 return hci_stack->num_cmd_packets > 0u; 637 } 638 639 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 640 // check for async hci transport implementations 641 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 642 return hci_stack->hci_transport->can_send_packet_now(packet_type); 643 } 644 645 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 646 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 647 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 648 } 649 650 int hci_can_send_acl_le_packet_now(void){ 651 if (hci_stack->hci_packet_buffer_reserved) return 0; 652 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 653 } 654 655 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 656 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 657 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 658 } 659 660 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 661 if (hci_stack->hci_packet_buffer_reserved) return 0; 662 return hci_can_send_prepared_acl_packet_now(con_handle); 663 } 664 665 #ifdef ENABLE_CLASSIC 666 int hci_can_send_acl_classic_packet_now(void){ 667 if (hci_stack->hci_packet_buffer_reserved) return 0; 668 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 669 } 670 671 int hci_can_send_prepared_sco_packet_now(void){ 672 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 673 if (hci_have_usb_transport()){ 674 return hci_stack->sco_can_send_now; 675 } else { 676 return hci_number_free_sco_slots() > 0; 677 } 678 } 679 680 int hci_can_send_sco_packet_now(void){ 681 if (hci_stack->hci_packet_buffer_reserved) return 0; 682 return hci_can_send_prepared_sco_packet_now(); 683 } 684 685 void hci_request_sco_can_send_now_event(void){ 686 hci_stack->sco_waiting_for_can_send_now = 1; 687 hci_notify_if_sco_can_send_now(); 688 } 689 #endif 690 691 // used for internal checks in l2cap.c 692 int hci_is_packet_buffer_reserved(void){ 693 return hci_stack->hci_packet_buffer_reserved; 694 } 695 696 // reserves outgoing packet buffer. @returns 1 if successful 697 int hci_reserve_packet_buffer(void){ 698 if (hci_stack->hci_packet_buffer_reserved) { 699 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 700 return 0; 701 } 702 hci_stack->hci_packet_buffer_reserved = 1; 703 return 1; 704 } 705 706 void hci_release_packet_buffer(void){ 707 hci_stack->hci_packet_buffer_reserved = 0; 708 } 709 710 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 711 static int hci_transport_synchronous(void){ 712 return hci_stack->hci_transport->can_send_packet_now == NULL; 713 } 714 715 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 716 717 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 718 719 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 720 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 721 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 722 max_acl_data_packet_length = hci_stack->le_data_packets_length; 723 } 724 725 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 726 if (hci_is_le_connection(connection) && (connection->le_max_tx_octets < max_acl_data_packet_length)){ 727 max_acl_data_packet_length = connection->le_max_tx_octets; 728 } 729 #endif 730 731 log_debug("hci_send_acl_packet_fragments entered"); 732 733 int err; 734 // multiple packets could be send on a synchronous HCI transport 735 while (true){ 736 737 log_debug("hci_send_acl_packet_fragments loop entered"); 738 739 // get current data 740 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 741 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 742 bool more_fragments = false; 743 744 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 745 if (current_acl_data_packet_length > max_acl_data_packet_length){ 746 more_fragments = true; 747 current_acl_data_packet_length = max_acl_data_packet_length; 748 } 749 750 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 751 if (acl_header_pos > 0u){ 752 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 753 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 754 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 755 } 756 757 // update header len 758 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 759 760 // count packet 761 connection->num_packets_sent++; 762 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 763 764 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 765 if (more_fragments){ 766 // update start of next fragment to send 767 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 768 } else { 769 // done 770 hci_stack->acl_fragmentation_pos = 0; 771 hci_stack->acl_fragmentation_total_size = 0; 772 } 773 774 // send packet 775 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 776 const int size = current_acl_data_packet_length + 4; 777 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 778 hci_stack->acl_fragmentation_tx_active = 1; 779 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 780 781 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 782 783 // done yet? 784 if (!more_fragments) break; 785 786 // can send more? 787 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 788 } 789 790 log_debug("hci_send_acl_packet_fragments loop over"); 791 792 // release buffer now for synchronous transport 793 if (hci_transport_synchronous()){ 794 hci_stack->acl_fragmentation_tx_active = 0; 795 hci_release_packet_buffer(); 796 hci_emit_transport_packet_sent(); 797 } 798 799 return err; 800 } 801 802 // pre: caller has reserved the packet buffer 803 int hci_send_acl_packet_buffer(int size){ 804 805 // log_info("hci_send_acl_packet_buffer size %u", size); 806 807 if (!hci_stack->hci_packet_buffer_reserved) { 808 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 809 return 0; 810 } 811 812 uint8_t * packet = hci_stack->hci_packet_buffer; 813 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 814 815 // check for free places on Bluetooth module 816 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 817 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 818 hci_release_packet_buffer(); 819 hci_emit_transport_packet_sent(); 820 return BTSTACK_ACL_BUFFERS_FULL; 821 } 822 823 hci_connection_t *connection = hci_connection_for_handle( con_handle); 824 if (!connection) { 825 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 826 hci_release_packet_buffer(); 827 hci_emit_transport_packet_sent(); 828 return 0; 829 } 830 831 #ifdef ENABLE_CLASSIC 832 hci_connection_timestamp(connection); 833 #endif 834 835 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 836 837 // setup data 838 hci_stack->acl_fragmentation_total_size = size; 839 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 840 841 return hci_send_acl_packet_fragments(connection); 842 } 843 844 #ifdef ENABLE_CLASSIC 845 // pre: caller has reserved the packet buffer 846 int hci_send_sco_packet_buffer(int size){ 847 848 // log_info("hci_send_acl_packet_buffer size %u", size); 849 850 if (!hci_stack->hci_packet_buffer_reserved) { 851 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 852 return 0; 853 } 854 855 uint8_t * packet = hci_stack->hci_packet_buffer; 856 857 // skip checks in loopback mode 858 if (!hci_stack->loopback_mode){ 859 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 860 861 // check for free places on Bluetooth module 862 if (!hci_can_send_prepared_sco_packet_now()) { 863 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 864 hci_release_packet_buffer(); 865 hci_emit_transport_packet_sent(); 866 return BTSTACK_ACL_BUFFERS_FULL; 867 } 868 869 // track send packet in connection struct 870 hci_connection_t *connection = hci_connection_for_handle( con_handle); 871 if (!connection) { 872 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 873 hci_release_packet_buffer(); 874 hci_emit_transport_packet_sent(); 875 return 0; 876 } 877 878 if (hci_have_usb_transport()){ 879 // token used 880 hci_stack->sco_can_send_now = 0; 881 } else { 882 if (hci_stack->synchronous_flow_control_enabled){ 883 connection->num_packets_sent++; 884 } else { 885 connection->sco_tx_ready--; 886 } 887 } 888 } 889 890 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 891 892 #ifdef HAVE_SCO_TRANSPORT 893 hci_stack->sco_transport->send_packet(packet, size); 894 hci_release_packet_buffer(); 895 hci_emit_transport_packet_sent(); 896 897 return 0; 898 #else 899 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 900 if (hci_transport_synchronous()){ 901 hci_release_packet_buffer(); 902 hci_emit_transport_packet_sent(); 903 } 904 905 return err; 906 #endif 907 } 908 #endif 909 910 static void acl_handler(uint8_t *packet, uint16_t size){ 911 912 // get info 913 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 914 hci_connection_t *conn = hci_connection_for_handle(con_handle); 915 uint8_t acl_flags = READ_ACL_FLAGS(packet); 916 uint16_t acl_length = READ_ACL_LENGTH(packet); 917 918 // ignore non-registered handle 919 if (!conn){ 920 log_error("acl_handler called with non-registered handle %u!" , con_handle); 921 return; 922 } 923 924 // assert packet is complete 925 if ((acl_length + 4u) != size){ 926 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 927 return; 928 } 929 930 #ifdef ENABLE_CLASSIC 931 // update idle timestamp 932 hci_connection_timestamp(conn); 933 #endif 934 935 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 936 hci_stack->host_completed_packets = 1; 937 conn->num_packets_completed++; 938 #endif 939 940 // handle different packet types 941 switch (acl_flags & 0x03u) { 942 943 case 0x01: // continuation fragment 944 945 // sanity checks 946 if (conn->acl_recombination_pos == 0u) { 947 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 948 return; 949 } 950 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 951 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 952 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 953 conn->acl_recombination_pos = 0; 954 return; 955 } 956 957 // append fragment payload (header already stored) 958 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 959 &packet[4], acl_length); 960 conn->acl_recombination_pos += acl_length; 961 962 // forward complete L2CAP packet if complete. 963 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 964 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 965 // reset recombination buffer 966 conn->acl_recombination_length = 0; 967 conn->acl_recombination_pos = 0; 968 } 969 break; 970 971 case 0x02: { // first fragment 972 973 // sanity check 974 if (conn->acl_recombination_pos) { 975 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 976 conn->acl_recombination_pos = 0; 977 } 978 979 // peek into L2CAP packet! 980 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 981 982 // compare fragment size to L2CAP packet size 983 if (acl_length >= (l2cap_length + 4u)){ 984 // forward fragment as L2CAP packet 985 hci_emit_acl_packet(packet, acl_length + 4u); 986 } else { 987 988 if (acl_length > HCI_ACL_BUFFER_SIZE){ 989 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 990 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 991 return; 992 } 993 994 // store first fragment and tweak acl length for complete package 995 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 996 packet, acl_length + 4u); 997 conn->acl_recombination_pos = acl_length + 4u; 998 conn->acl_recombination_length = l2cap_length; 999 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 1000 } 1001 break; 1002 1003 } 1004 default: 1005 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 1006 return; 1007 } 1008 1009 // execute main loop 1010 hci_run(); 1011 } 1012 1013 static void hci_shutdown_connection(hci_connection_t *conn){ 1014 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 1015 1016 #ifdef ENABLE_CLASSIC 1017 #if defined(ENABLE_SCO_OVER_HCI) || defined(HAVE_SCO_TRANSPORT) 1018 bd_addr_type_t addr_type = conn->address_type; 1019 #endif 1020 #ifdef HAVE_SCO_TRANSPORT 1021 hci_con_handle_t con_handle = conn->con_handle; 1022 #endif 1023 #endif 1024 1025 btstack_run_loop_remove_timer(&conn->timeout); 1026 1027 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1028 btstack_memory_hci_connection_free( conn ); 1029 1030 // now it's gone 1031 hci_emit_nr_connections_changed(); 1032 1033 #ifdef ENABLE_CLASSIC 1034 #ifdef ENABLE_SCO_OVER_HCI 1035 // update SCO 1036 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->hci_transport != NULL) && (hci_stack->hci_transport->set_sco_config != NULL)){ 1037 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 1038 } 1039 #endif 1040 #ifdef HAVE_SCO_TRANSPORT 1041 if ((addr_type == BD_ADDR_TYPE_SCO) && (hci_stack->sco_transport != NULL)){ 1042 hci_stack->sco_transport->close(con_handle); 1043 } 1044 #endif 1045 #endif 1046 } 1047 1048 #ifdef ENABLE_CLASSIC 1049 1050 static const uint16_t packet_type_sizes[] = { 1051 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 1052 HCI_ACL_DH1_SIZE, 0, 0, 0, 1053 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 1054 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 1055 }; 1056 static const uint8_t packet_type_feature_requirement_bit[] = { 1057 0, // 3 slot packets 1058 1, // 5 slot packets 1059 25, // EDR 2 mpbs 1060 26, // EDR 3 mbps 1061 39, // 3 slot EDR packts 1062 40, // 5 slot EDR packet 1063 }; 1064 static const uint16_t packet_type_feature_packet_mask[] = { 1065 0x0f00, // 3 slot packets 1066 0xf000, // 5 slot packets 1067 0x1102, // EDR 2 mpbs 1068 0x2204, // EDR 3 mbps 1069 0x0300, // 3 slot EDR packts 1070 0x3000, // 5 slot EDR packet 1071 }; 1072 1073 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1074 // enable packet types based on size 1075 uint16_t packet_types = 0; 1076 unsigned int i; 1077 for (i=0;i<16;i++){ 1078 if (packet_type_sizes[i] == 0) continue; 1079 if (packet_type_sizes[i] <= buffer_size){ 1080 packet_types |= 1 << i; 1081 } 1082 } 1083 // disable packet types due to missing local supported features 1084 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1085 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1086 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1087 if (feature_set) continue; 1088 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1089 packet_types &= ~packet_type_feature_packet_mask[i]; 1090 } 1091 // flip bits for "may not be used" 1092 packet_types ^= 0x3306; 1093 return packet_types; 1094 } 1095 1096 uint16_t hci_usable_acl_packet_types(void){ 1097 return hci_stack->packet_types; 1098 } 1099 #endif 1100 1101 uint8_t* hci_get_outgoing_packet_buffer(void){ 1102 // hci packet buffer is >= acl data packet length 1103 return hci_stack->hci_packet_buffer; 1104 } 1105 1106 uint16_t hci_max_acl_data_packet_length(void){ 1107 return hci_stack->acl_data_packet_length; 1108 } 1109 1110 #ifdef ENABLE_CLASSIC 1111 int hci_extended_sco_link_supported(void){ 1112 // No. 31, byte 3, bit 7 1113 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1114 } 1115 #endif 1116 1117 int hci_non_flushable_packet_boundary_flag_supported(void){ 1118 // No. 54, byte 6, bit 6 1119 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1120 } 1121 1122 static int gap_ssp_supported(void){ 1123 // No. 51, byte 6, bit 3 1124 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1125 } 1126 1127 static int hci_classic_supported(void){ 1128 #ifdef ENABLE_CLASSIC 1129 // No. 37, byte 4, bit 5, = No BR/EDR Support 1130 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1131 #else 1132 return 0; 1133 #endif 1134 } 1135 1136 static int hci_le_supported(void){ 1137 #ifdef ENABLE_BLE 1138 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1139 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1140 #else 1141 return 0; 1142 #endif 1143 } 1144 1145 #ifdef ENABLE_BLE 1146 1147 static void hci_get_own_address_for_addr_type(uint8_t own_addr_type, bd_addr_t own_addr){ 1148 if (own_addr_type == BD_ADDR_TYPE_LE_PUBLIC){ 1149 (void)memcpy(own_addr, hci_stack->local_bd_addr, 6); 1150 } else { 1151 (void)memcpy(own_addr, hci_stack->le_random_address, 6); 1152 } 1153 } 1154 1155 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1156 *addr_type = hci_stack->le_own_addr_type; 1157 hci_get_own_address_for_addr_type(hci_stack->le_own_addr_type, addr); 1158 } 1159 1160 #ifdef ENABLE_LE_PERIPHERAL 1161 void gap_le_get_own_advertisements_address(uint8_t * addr_type, bd_addr_t addr){ 1162 *addr_type = hci_stack->le_advertisements_own_addr_type; 1163 hci_get_own_address_for_addr_type(hci_stack->le_advertisements_own_addr_type, addr); 1164 }; 1165 #endif 1166 1167 #ifdef ENABLE_LE_CENTRAL 1168 1169 /** 1170 * @brief Get own addr type and address used for LE connections (Central) 1171 */ 1172 void gap_le_get_own_connection_address(uint8_t * addr_type, bd_addr_t addr){ 1173 *addr_type = hci_stack->le_connection_own_addr_type; 1174 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, addr); 1175 } 1176 1177 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1178 1179 int offset = 3; 1180 int num_reports = packet[offset]; 1181 offset += 1; 1182 1183 int i; 1184 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1185 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1186 for (i=0; (i<num_reports) && (offset < size);i++){ 1187 // sanity checks on data_length: 1188 uint8_t data_length = packet[offset + 8]; 1189 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1190 if ((offset + 9u + data_length + 1u) > size) return; 1191 // setup event 1192 uint8_t event_size = 10u + data_length; 1193 int pos = 0; 1194 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1195 event[pos++] = event_size; 1196 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1197 offset += 8; 1198 pos += 8; 1199 event[pos++] = packet[offset + 1 + data_length]; // rssi 1200 event[pos++] = data_length; 1201 offset++; 1202 (void)memcpy(&event[pos], &packet[offset], data_length); 1203 pos += data_length; 1204 offset += data_length + 1u; // rssi 1205 hci_emit_event(event, pos, 1); 1206 } 1207 } 1208 #endif 1209 #endif 1210 1211 #ifdef ENABLE_BLE 1212 #ifdef ENABLE_LE_PERIPHERAL 1213 static void hci_update_advertisements_enabled_for_current_roles(void){ 1214 if (hci_stack->le_advertisements_enabled){ 1215 // get number of active le slave connections 1216 int num_slave_connections = 0; 1217 btstack_linked_list_iterator_t it; 1218 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1219 while (btstack_linked_list_iterator_has_next(&it)){ 1220 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1221 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1222 if (con->state != OPEN) continue; 1223 if (con->role != HCI_ROLE_SLAVE) continue; 1224 if (!hci_is_le_connection(con)) continue; 1225 num_slave_connections++; 1226 } 1227 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1228 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1229 } else { 1230 hci_stack->le_advertisements_enabled_for_current_roles = false; 1231 } 1232 } 1233 #endif 1234 #endif 1235 1236 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1237 1238 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1239 if (!hci_stack->config) return 0; 1240 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1241 // Limit baud rate for Broadcom chipsets to 3 mbps 1242 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1243 baud_rate = 3000000; 1244 } 1245 return baud_rate; 1246 } 1247 1248 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1249 UNUSED(ds); 1250 1251 switch (hci_stack->substate){ 1252 case HCI_INIT_W4_SEND_RESET: 1253 log_info("Resend HCI Reset"); 1254 hci_stack->substate = HCI_INIT_SEND_RESET; 1255 hci_stack->num_cmd_packets = 1; 1256 hci_run(); 1257 break; 1258 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1259 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1260 if (hci_stack->hci_transport->reset_link){ 1261 hci_stack->hci_transport->reset_link(); 1262 } 1263 1264 /* fall through */ 1265 1266 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1267 log_info("Resend HCI Reset - CSR Warm Boot"); 1268 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1269 hci_stack->num_cmd_packets = 1; 1270 hci_run(); 1271 break; 1272 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1273 if (hci_stack->hci_transport->set_baudrate){ 1274 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1275 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1276 hci_stack->hci_transport->set_baudrate(baud_rate); 1277 } 1278 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1279 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1280 if (hci_stack->hci_transport->reset_link){ 1281 log_info("Link Reset"); 1282 hci_stack->hci_transport->reset_link(); 1283 } 1284 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1285 hci_run(); 1286 } 1287 break; 1288 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1289 // otherwise continue 1290 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1291 hci_send_cmd(&hci_read_local_supported_commands); 1292 break; 1293 default: 1294 break; 1295 } 1296 } 1297 #endif 1298 1299 static void hci_initializing_next_state(void){ 1300 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1301 } 1302 1303 // assumption: hci_can_send_command_packet_now() == true 1304 static void hci_initializing_run(void){ 1305 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1306 switch (hci_stack->substate){ 1307 case HCI_INIT_SEND_RESET: 1308 hci_state_reset(); 1309 1310 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1311 // prepare reset if command complete not received in 100ms 1312 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1313 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1314 btstack_run_loop_add_timer(&hci_stack->timeout); 1315 #endif 1316 // send command 1317 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1318 hci_send_cmd(&hci_reset); 1319 break; 1320 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1321 hci_send_cmd(&hci_read_local_version_information); 1322 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1323 break; 1324 case HCI_INIT_SEND_READ_LOCAL_NAME: 1325 hci_send_cmd(&hci_read_local_name); 1326 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1327 break; 1328 1329 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1330 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1331 hci_state_reset(); 1332 // prepare reset if command complete not received in 100ms 1333 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1334 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1335 btstack_run_loop_add_timer(&hci_stack->timeout); 1336 // send command 1337 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1338 hci_send_cmd(&hci_reset); 1339 break; 1340 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1341 hci_state_reset(); 1342 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1343 hci_send_cmd(&hci_reset); 1344 break; 1345 case HCI_INIT_SEND_BAUD_CHANGE: { 1346 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1347 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1348 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1349 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1350 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1351 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1352 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1353 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1354 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1355 btstack_run_loop_add_timer(&hci_stack->timeout); 1356 } 1357 break; 1358 } 1359 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1360 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1361 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1362 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1363 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1364 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1365 break; 1366 } 1367 case HCI_INIT_CUSTOM_INIT: 1368 // Custom initialization 1369 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1370 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1371 bool send_cmd = false; 1372 switch (hci_stack->chipset_result){ 1373 case BTSTACK_CHIPSET_VALID_COMMAND: 1374 send_cmd = true; 1375 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1376 break; 1377 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1378 send_cmd = true; 1379 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1380 log_info("CSR Warm Boot"); 1381 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1382 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1383 btstack_run_loop_add_timer(&hci_stack->timeout); 1384 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1385 && hci_stack->config 1386 && hci_stack->chipset 1387 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1388 && hci_stack->hci_transport->set_baudrate 1389 && hci_transport_uart_get_main_baud_rate()){ 1390 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1391 } else { 1392 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1393 } 1394 break; 1395 default: 1396 break; 1397 } 1398 1399 if (send_cmd){ 1400 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1401 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1402 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1403 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1404 break; 1405 } 1406 log_info("Init script done"); 1407 1408 // Init script download on Broadcom chipsets causes: 1409 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1410 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1411 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1412 1413 // - baud rate to reset, restore UART baud rate if needed 1414 int need_baud_change = hci_stack->config 1415 && hci_stack->chipset 1416 && hci_stack->chipset->set_baudrate_command 1417 && hci_stack->hci_transport->set_baudrate 1418 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1419 if (need_baud_change) { 1420 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1421 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1422 hci_stack->hci_transport->set_baudrate(baud_rate); 1423 } 1424 1425 uint16_t bcm_delay_ms = 300; 1426 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1427 // -> Work around: wait here. 1428 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1429 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1430 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1431 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1432 btstack_run_loop_add_timer(&hci_stack->timeout); 1433 break; 1434 } 1435 } 1436 // otherwise continue 1437 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1438 hci_send_cmd(&hci_read_local_supported_commands); 1439 break; 1440 case HCI_INIT_SET_BD_ADDR: 1441 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1442 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1443 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1444 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1445 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1446 break; 1447 #endif 1448 1449 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1450 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1451 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1452 hci_send_cmd(&hci_read_local_supported_commands); 1453 break; 1454 case HCI_INIT_READ_BD_ADDR: 1455 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1456 hci_send_cmd(&hci_read_bd_addr); 1457 break; 1458 case HCI_INIT_READ_BUFFER_SIZE: 1459 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1460 hci_send_cmd(&hci_read_buffer_size); 1461 break; 1462 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1463 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1464 hci_send_cmd(&hci_read_local_supported_features); 1465 break; 1466 1467 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1468 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1469 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1470 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1471 break; 1472 case HCI_INIT_HOST_BUFFER_SIZE: 1473 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1474 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1475 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1476 break; 1477 #endif 1478 1479 case HCI_INIT_SET_EVENT_MASK: 1480 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1481 if (hci_le_supported()){ 1482 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x3FFFFFFFU); 1483 } else { 1484 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1485 hci_send_cmd(&hci_set_event_mask,0xFFFFFFFFU, 0x1FFFFFFFU); 1486 } 1487 break; 1488 1489 #ifdef ENABLE_CLASSIC 1490 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1491 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1492 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1493 break; 1494 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1495 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1496 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1497 break; 1498 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1499 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1500 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1501 break; 1502 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1503 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1504 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1505 break; 1506 case HCI_INIT_WRITE_LOCAL_NAME: { 1507 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1508 hci_reserve_packet_buffer(); 1509 uint8_t * packet = hci_stack->hci_packet_buffer; 1510 // construct HCI Command and send 1511 uint16_t opcode = hci_write_local_name.opcode; 1512 hci_stack->last_cmd_opcode = opcode; 1513 packet[0] = opcode & 0xff; 1514 packet[1] = opcode >> 8; 1515 packet[2] = DEVICE_NAME_LEN; 1516 memset(&packet[3], 0, DEVICE_NAME_LEN); 1517 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1518 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1519 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1520 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1521 // expand '00:00:00:00:00:00' in name with bd_addr 1522 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1523 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1524 break; 1525 } 1526 case HCI_INIT_WRITE_EIR_DATA: { 1527 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1528 hci_reserve_packet_buffer(); 1529 uint8_t * packet = hci_stack->hci_packet_buffer; 1530 // construct HCI Command in-place and send 1531 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1532 hci_stack->last_cmd_opcode = opcode; 1533 uint16_t offset = 0; 1534 packet[offset++] = opcode & 0xff; 1535 packet[offset++] = opcode >> 8; 1536 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1537 packet[offset++] = 0; // FEC not required 1538 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1539 if (hci_stack->eir_data){ 1540 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1541 ad_context_t context; 1542 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1543 uint8_t data_type = ad_iterator_get_data_type(&context); 1544 uint8_t size = ad_iterator_get_data_len(&context); 1545 const uint8_t *data = ad_iterator_get_data(&context); 1546 // copy item 1547 packet[offset++] = size + 1; 1548 packet[offset++] = data_type; 1549 memcpy(&packet[offset], data, size); 1550 // update name item 1551 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1552 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1553 } 1554 offset += size; 1555 } 1556 } else { 1557 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1558 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1559 packet[offset++] = bytes_to_copy + 1; 1560 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1561 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1562 // expand '00:00:00:00:00:00' in name with bd_addr 1563 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1564 } 1565 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1566 break; 1567 } 1568 case HCI_INIT_WRITE_INQUIRY_MODE: 1569 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1570 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1571 break; 1572 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1573 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1574 hci_stack->secure_connections_active = true; 1575 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1576 break; 1577 case HCI_INIT_WRITE_SCAN_ENABLE: 1578 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1579 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1580 break; 1581 // only sent if ENABLE_SCO_OVER_HCI is defined 1582 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1583 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1584 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1585 break; 1586 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1587 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1588 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1589 break; 1590 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1591 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1592 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1593 #ifdef ENABLE_SCO_OVER_HCI 1594 log_info("BCM: Route SCO data via HCI transport"); 1595 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1596 #endif 1597 #ifdef ENABLE_SCO_OVER_PCM 1598 log_info("BCM: Route SCO data via PCM interface"); 1599 #ifdef ENABLE_BCM_PCM_WBS 1600 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1601 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 2, 0, 1, 1); 1602 #else 1603 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1604 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 1, 0, 1, 1); 1605 #endif 1606 #endif 1607 break; 1608 #ifdef ENABLE_SCO_OVER_PCM 1609 case HCI_INIT_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1610 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1611 log_info("BCM: Config PCM interface for I2S"); 1612 #ifdef ENABLE_BCM_PCM_WBS 1613 // 512 kHz bit clock for 2 channels x 16 bit x 8 kHz 1614 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 2); 1615 #else 1616 // 256 kHz bit clock for 2 channels x 16 bit x 8 kHz 1617 hci_send_cmd(&hci_bcm_write_i2spcm_interface_param, 1, 1, 0, 1); 1618 #endif 1619 break; 1620 #endif 1621 #endif 1622 1623 #ifdef ENABLE_BLE 1624 // LE INIT 1625 case HCI_INIT_LE_READ_BUFFER_SIZE: 1626 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1627 hci_send_cmd(&hci_le_read_buffer_size); 1628 break; 1629 case HCI_INIT_LE_SET_EVENT_MASK: 1630 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1631 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1632 break; 1633 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1634 // LE Supported Host = 1, Simultaneous Host = 0 1635 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1636 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1637 break; 1638 #endif 1639 1640 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1641 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1642 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1643 hci_send_cmd(&hci_le_read_maximum_data_length); 1644 break; 1645 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1646 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1647 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1648 break; 1649 #endif 1650 1651 #ifdef ENABLE_LE_CENTRAL 1652 case HCI_INIT_READ_WHITE_LIST_SIZE: 1653 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1654 hci_send_cmd(&hci_le_read_white_list_size); 1655 break; 1656 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1657 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1658 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); 1659 break; 1660 #endif 1661 default: 1662 return; 1663 } 1664 } 1665 1666 static void hci_init_done(void){ 1667 // done. tell the app 1668 log_info("hci_init_done -> HCI_STATE_WORKING"); 1669 hci_stack->state = HCI_STATE_WORKING; 1670 hci_emit_state(); 1671 hci_run(); 1672 } 1673 1674 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1675 bool command_completed = false; 1676 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1677 uint16_t opcode = little_endian_read_16(packet,3); 1678 if (opcode == hci_stack->last_cmd_opcode){ 1679 command_completed = true; 1680 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1681 } else { 1682 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1683 } 1684 } 1685 1686 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1687 uint8_t status = packet[2]; 1688 uint16_t opcode = little_endian_read_16(packet,4); 1689 if (opcode == hci_stack->last_cmd_opcode){ 1690 if (status){ 1691 command_completed = true; 1692 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1693 } else { 1694 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1695 } 1696 } else { 1697 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1698 } 1699 } 1700 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1701 // Vendor == CSR 1702 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1703 // TODO: track actual command 1704 command_completed = true; 1705 } 1706 1707 // Vendor == Toshiba 1708 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1709 // TODO: track actual command 1710 command_completed = true; 1711 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1712 hci_stack->num_cmd_packets = 1; 1713 } 1714 #endif 1715 1716 return command_completed; 1717 } 1718 1719 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1720 1721 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1722 1723 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1724 1725 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1726 1727 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1728 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1729 // 1730 // HCI Reset 1731 // Timeout 100 ms 1732 // HCI Reset 1733 // Command Complete Reset 1734 // HCI Read Local Version Information 1735 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1736 // hang... 1737 // 1738 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1739 if (!command_completed 1740 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1741 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1742 1743 uint16_t opcode = little_endian_read_16(packet,3); 1744 if (opcode == hci_reset.opcode){ 1745 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1746 return; 1747 } 1748 } 1749 1750 // CSR & H5 1751 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1752 if (!command_completed 1753 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1754 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1755 1756 uint16_t opcode = little_endian_read_16(packet,3); 1757 if (opcode == hci_reset.opcode){ 1758 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1759 return; 1760 } 1761 } 1762 1763 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1764 // fix: Correct substate and behave as command below 1765 if (command_completed){ 1766 switch (hci_stack->substate){ 1767 case HCI_INIT_SEND_RESET: 1768 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1769 break; 1770 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1772 break; 1773 default: 1774 break; 1775 } 1776 } 1777 1778 #endif 1779 1780 if (!command_completed) return; 1781 1782 bool need_baud_change = false; 1783 bool need_addr_change = false; 1784 1785 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1786 need_baud_change = hci_stack->config 1787 && hci_stack->chipset 1788 && hci_stack->chipset->set_baudrate_command 1789 && hci_stack->hci_transport->set_baudrate 1790 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1791 1792 need_addr_change = hci_stack->custom_bd_addr_set 1793 && hci_stack->chipset 1794 && hci_stack->chipset->set_bd_addr_command; 1795 #endif 1796 1797 switch(hci_stack->substate){ 1798 1799 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1800 case HCI_INIT_SEND_RESET: 1801 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1802 // fix: just correct substate and behave as command below 1803 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1804 btstack_run_loop_remove_timer(&hci_stack->timeout); 1805 break; 1806 case HCI_INIT_W4_SEND_RESET: 1807 btstack_run_loop_remove_timer(&hci_stack->timeout); 1808 break; 1809 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1810 log_info("Received local name, need baud change %d", (int) need_baud_change); 1811 if (need_baud_change){ 1812 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1813 return; 1814 } 1815 // skip baud change 1816 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1817 return; 1818 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1819 // for STLC2500D, baud rate change already happened. 1820 // for others, baud rate gets changed now 1821 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1822 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1823 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1824 hci_stack->hci_transport->set_baudrate(baud_rate); 1825 } 1826 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1827 return; 1828 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1829 btstack_run_loop_remove_timer(&hci_stack->timeout); 1830 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1831 return; 1832 case HCI_INIT_W4_CUSTOM_INIT: 1833 // repeat custom init 1834 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1835 return; 1836 #else 1837 case HCI_INIT_W4_SEND_RESET: 1838 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1839 return ; 1840 #endif 1841 1842 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1843 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1844 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1845 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1846 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1847 return; 1848 } 1849 if (need_addr_change){ 1850 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1851 return; 1852 } 1853 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1854 return; 1855 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1856 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1857 if (need_baud_change){ 1858 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1859 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1860 hci_stack->hci_transport->set_baudrate(baud_rate); 1861 } 1862 if (need_addr_change){ 1863 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1864 return; 1865 } 1866 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1867 return; 1868 case HCI_INIT_W4_SET_BD_ADDR: 1869 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1870 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1871 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1872 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1873 return; 1874 } 1875 // skipping st warm boot 1876 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1877 return; 1878 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1879 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1880 return; 1881 #endif 1882 case HCI_INIT_W4_READ_BD_ADDR: 1883 // only read buffer size if supported 1884 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1885 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1886 return; 1887 } 1888 // skipping read buffer size 1889 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1890 return; 1891 case HCI_INIT_W4_SET_EVENT_MASK: 1892 // skip Classic init commands for LE only chipsets 1893 if (!hci_classic_supported()){ 1894 #ifdef ENABLE_BLE 1895 if (hci_le_supported()){ 1896 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1897 return; 1898 } 1899 #endif 1900 log_error("Neither BR/EDR nor LE supported"); 1901 hci_init_done(); 1902 return; 1903 } 1904 if (!gap_ssp_supported()){ 1905 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1906 return; 1907 } 1908 break; 1909 #ifdef ENABLE_BLE 1910 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1911 // skip write le host if not supported (e.g. on LE only EM9301) 1912 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1913 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1914 return; 1915 1916 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1917 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1918 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1919 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1920 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1921 return; 1922 } 1923 // explicit fall through to reduce repetitions 1924 1925 #ifdef ENABLE_LE_CENTRAL 1926 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1927 #else 1928 hci_init_done(); 1929 #endif 1930 return; 1931 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1932 1933 #endif /* ENABLE_BLE */ 1934 1935 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1936 // skip write secure connections host support if not supported or disabled 1937 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1938 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1939 return; 1940 } 1941 break; 1942 1943 #ifdef ENABLE_SCO_OVER_HCI 1944 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1945 // skip write synchronous flow control if not supported 1946 if (hci_stack->local_supported_commands[0] & 0x04) break; 1947 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1948 1949 /* fall through */ 1950 1951 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1952 // skip write default erroneous data reporting if not supported 1953 if (hci_stack->local_supported_commands[0] & 0x08) break; 1954 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1955 1956 /* fall through */ 1957 1958 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1959 // skip bcm set sco pcm config on non-Broadcom chipsets 1960 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1961 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1962 1963 /* fall through */ 1964 1965 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1966 if (!hci_le_supported()){ 1967 // SKIP LE init for Classic only configuration 1968 hci_init_done(); 1969 return; 1970 } 1971 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM; 1972 break; 1973 1974 #else /* !ENABLE_SCO_OVER_HCI */ 1975 1976 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1977 #ifdef ENABLE_SCO_OVER_PCM 1978 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1979 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1980 return; 1981 } 1982 #endif 1983 /* fall through */ 1984 1985 case HCI_INIT_W4_BCM_WRITE_I2SPCM_INTERFACE_PARAM: 1986 #ifdef ENABLE_BLE 1987 if (hci_le_supported()){ 1988 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1989 return; 1990 } 1991 #endif 1992 // SKIP LE init for Classic only configuration 1993 hci_init_done(); 1994 return; 1995 #endif /* ENABLE_SCO_OVER_HCI */ 1996 1997 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1998 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1999 // Response to command before init done state -> init done 2000 case (HCI_INIT_DONE-1): 2001 hci_init_done(); 2002 return; 2003 #endif 2004 2005 default: 2006 break; 2007 } 2008 hci_initializing_next_state(); 2009 } 2010 2011 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 2012 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 2013 bd_addr_t bd_address; 2014 (void)memcpy(&bd_address, conn->address, 6); 2015 2016 #ifdef ENABLE_CLASSIC 2017 // cache needed data 2018 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 2019 #endif 2020 2021 // connection failed, remove entry 2022 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2023 btstack_memory_hci_connection_free( conn ); 2024 2025 #ifdef ENABLE_CLASSIC 2026 // notify client if dedicated bonding 2027 if (notify_dedicated_bonding_failed){ 2028 log_info("hci notify_dedicated_bonding_failed"); 2029 hci_emit_dedicated_bonding_result(bd_address, status); 2030 } 2031 2032 // if authentication error, also delete link key 2033 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 2034 gap_drop_link_key_for_bd_addr(bd_address); 2035 } 2036 #else 2037 UNUSED(status); 2038 #endif 2039 } 2040 2041 #ifdef ENABLE_CLASSIC 2042 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 2043 // SSP Controller 2044 if (features[6] & (1 << 3)){ 2045 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 2046 } 2047 // eSCO 2048 if (features[3] & (1<<7)){ 2049 conn->remote_supported_features[0] |= 1; 2050 } 2051 // Extended features 2052 if (features[7] & (1<<7)){ 2053 conn->remote_supported_features[0] |= 2; 2054 } 2055 } 2056 2057 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 2058 // SSP Host 2059 if (features[0] & (1 << 0)){ 2060 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 2061 } 2062 // SC Host 2063 if (features[0] & (1 << 3)){ 2064 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 2065 } 2066 } 2067 2068 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 2069 // SC Controller 2070 if (features[1] & (1 << 0)){ 2071 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2072 } 2073 } 2074 2075 static void hci_handle_remote_features_received(hci_connection_t * conn){ 2076 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 2077 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 2078 if (conn->bonding_flags & BONDING_DEDICATED){ 2079 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2080 } 2081 } 2082 static bool hci_remote_sc_enabled(hci_connection_t * connection){ 2083 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2084 return (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 2085 } 2086 2087 #endif 2088 2089 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 2090 // handle BT initialization 2091 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2092 hci_initializing_event_handler(packet, size); 2093 } 2094 2095 // help with BT sleep 2096 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 2097 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 2098 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 2099 hci_initializing_next_state(); 2100 } 2101 } 2102 2103 #ifdef ENABLE_CLASSIC 2104 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 2105 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2106 conn->encryption_key_size = encryption_key_size; 2107 2108 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) != 0) { 2109 conn->requested_security_level = LEVEL_0; 2110 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 2111 return; 2112 } 2113 2114 // Request Authentication if not already done 2115 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2116 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2117 } 2118 #endif 2119 2120 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2121 UNUSED(size); 2122 2123 uint16_t manufacturer; 2124 #ifdef ENABLE_CLASSIC 2125 hci_con_handle_t handle; 2126 hci_connection_t * conn; 2127 uint8_t status; 2128 #endif 2129 // get num cmd packets - limit to 1 to reduce complexity 2130 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2131 2132 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2133 switch (opcode){ 2134 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2135 if (packet[5]) break; 2136 // terminate, name 248 chars 2137 packet[6+248] = 0; 2138 log_info("local name: %s", &packet[6]); 2139 break; 2140 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2141 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2142 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2143 uint16_t acl_len = little_endian_read_16(packet, 6); 2144 uint16_t sco_len = packet[8]; 2145 2146 // determine usable ACL/SCO payload size 2147 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2148 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2149 2150 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2151 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2152 2153 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2154 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2155 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2156 } 2157 break; 2158 case HCI_OPCODE_HCI_READ_RSSI: 2159 if (packet[5] == ERROR_CODE_SUCCESS){ 2160 uint8_t event[5]; 2161 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2162 event[1] = 3; 2163 (void)memcpy(&event[2], &packet[6], 3); 2164 hci_emit_event(event, sizeof(event), 1); 2165 } 2166 break; 2167 #ifdef ENABLE_BLE 2168 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2169 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2170 hci_stack->le_acl_packets_total_num = packet[8]; 2171 // determine usable ACL payload size 2172 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2173 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2174 } 2175 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2176 break; 2177 #endif 2178 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2179 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2180 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2181 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2182 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); 2183 break; 2184 #endif 2185 #ifdef ENABLE_LE_CENTRAL 2186 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2187 hci_stack->le_whitelist_capacity = packet[6]; 2188 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2189 break; 2190 #endif 2191 case HCI_OPCODE_HCI_READ_BD_ADDR: 2192 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2193 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)); 2194 #ifdef ENABLE_CLASSIC 2195 if (hci_stack->link_key_db){ 2196 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2197 } 2198 #endif 2199 break; 2200 #ifdef ENABLE_CLASSIC 2201 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2202 hci_emit_discoverable_enabled(hci_stack->discoverable); 2203 break; 2204 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2205 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2206 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2207 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2208 hci_emit_event(event, sizeof(event), 1); 2209 } 2210 break; 2211 #endif 2212 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2213 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2214 2215 #ifdef ENABLE_CLASSIC 2216 // determine usable ACL packet types based on host buffer size and supported features 2217 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2218 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2219 #endif 2220 // Classic/LE 2221 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2222 break; 2223 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2224 manufacturer = little_endian_read_16(packet, 10); 2225 // map Cypress to Broadcom 2226 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2227 log_info("Treat Cypress as Broadcom"); 2228 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2229 little_endian_store_16(packet, 10, manufacturer); 2230 } 2231 hci_stack->manufacturer = manufacturer; 2232 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2233 break; 2234 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2235 hci_stack->local_supported_commands[0] = 2236 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2237 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2238 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2239 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2240 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2241 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2242 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2243 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2244 hci_stack->local_supported_commands[1] = 2245 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2246 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2247 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2248 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2249 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2250 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2251 break; 2252 #ifdef ENABLE_CLASSIC 2253 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2254 if (packet[5]) return; 2255 hci_stack->synchronous_flow_control_enabled = 1; 2256 break; 2257 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2258 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2259 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2260 conn = hci_connection_for_handle(handle); 2261 if (conn != NULL) { 2262 uint8_t key_size = 0; 2263 if (status == 0){ 2264 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2265 log_info("Handle %04x key Size: %u", handle, key_size); 2266 } else { 2267 key_size = 1; 2268 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2269 } 2270 hci_handle_read_encryption_key_size_complete(conn, key_size); 2271 } 2272 break; 2273 // assert pairing complete event is emitted. 2274 // note: for SSP, Simple Pairing Complete Event is sufficient, but we want to be more robust 2275 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 2276 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 2277 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 2278 // lookup connection by gap pairing addr 2279 conn = hci_connection_for_bd_addr_and_type(hci_stack->gap_pairing_addr, BD_ADDR_TYPE_ACL); 2280 if (conn == NULL) break; 2281 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2282 break; 2283 2284 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2285 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2286 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2287 uint8_t event[67]; 2288 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2289 event[1] = 65; 2290 (void)memset(&event[2], 0, 65); 2291 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2292 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2293 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2294 event[2] = 3; 2295 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2296 } else { 2297 event[2] = 1; 2298 } 2299 } 2300 hci_emit_event(event, sizeof(event), 0); 2301 break; 2302 } 2303 2304 // note: only needed if user does not provide OOB data 2305 case HCI_OPCODE_HCI_REMOTE_OOB_DATA_REQUEST_NEGATIVE_REPLY: 2306 conn = hci_connection_for_handle(hci_stack->classic_oob_con_handle); 2307 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 2308 if (conn == NULL) break; 2309 hci_pairing_complete(conn, ERROR_CODE_AUTHENTICATION_FAILURE); 2310 break; 2311 #endif 2312 #endif 2313 default: 2314 break; 2315 } 2316 } 2317 2318 #ifdef ENABLE_BLE 2319 static void event_handle_le_connection_complete(const uint8_t * packet){ 2320 bd_addr_t addr; 2321 bd_addr_type_t addr_type; 2322 hci_connection_t * conn; 2323 2324 // Connection management 2325 reverse_bd_addr(&packet[8], addr); 2326 addr_type = (bd_addr_type_t)packet[7]; 2327 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2328 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2329 2330 #ifdef ENABLE_LE_CENTRAL 2331 // handle error: error is reported only to the initiator -> outgoing connection 2332 if (packet[3]){ 2333 2334 // handle cancelled outgoing connection 2335 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2336 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2337 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2338 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2339 // reset state 2340 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2341 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2342 // get outgoing connection conn struct for direct connect 2343 conn = gap_get_outgoing_connection(); 2344 } 2345 2346 // outgoing le connection establishment is done 2347 if (conn){ 2348 // remove entry 2349 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2350 btstack_memory_hci_connection_free( conn ); 2351 } 2352 return; 2353 } 2354 #endif 2355 2356 // on success, both hosts receive connection complete event 2357 if (packet[6] == HCI_ROLE_MASTER){ 2358 #ifdef ENABLE_LE_CENTRAL 2359 // if we're master on an le connection, it was an outgoing connection and we're done with it 2360 // note: no hci_connection_t object exists yet for connect with whitelist 2361 if (hci_is_le_connection_type(addr_type)){ 2362 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2363 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2364 } 2365 #endif 2366 } else { 2367 #ifdef ENABLE_LE_PERIPHERAL 2368 // if we're slave, it was an incoming connection, advertisements have stopped 2369 hci_stack->le_advertisements_active = false; 2370 #endif 2371 } 2372 2373 // LE connections are auto-accepted, so just create a connection if there isn't one already 2374 if (!conn){ 2375 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2376 } 2377 2378 // no memory, sorry. 2379 if (!conn){ 2380 return; 2381 } 2382 2383 conn->state = OPEN; 2384 conn->role = packet[6]; 2385 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2386 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2387 2388 #ifdef ENABLE_LE_PERIPHERAL 2389 if (packet[6] == HCI_ROLE_SLAVE){ 2390 hci_update_advertisements_enabled_for_current_roles(); 2391 } 2392 #endif 2393 2394 // init unenhanced att bearer mtu 2395 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2396 conn->att_connection.mtu_exchanged = false; 2397 2398 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2399 2400 // restart timer 2401 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2402 // btstack_run_loop_add_timer(&conn->timeout); 2403 2404 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2405 2406 hci_emit_nr_connections_changed(); 2407 } 2408 #endif 2409 2410 #ifdef ENABLE_CLASSIC 2411 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){ 2412 if (io_cap_local == SSP_IO_CAPABILITY_UNKNOWN) return false; 2413 // LEVEL_4 is tested by l2cap 2414 // LEVEL 3 requires MITM protection -> check io capabilities 2415 if (level >= LEVEL_3){ 2416 if (io_cap_remote >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2417 if (io_cap_local >= SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT) return false; 2418 if ((io_cap_remote == SSP_IO_CAPABILITY_KEYBOARD_ONLY) && (io_cap_local == SSP_IO_CAPABILITY_KEYBOARD_ONLY)) return false; 2419 } 2420 // LEVEL 2 requires SSP, which is a given 2421 return true; 2422 } 2423 2424 static bool btstack_is_null(uint8_t * data, uint16_t size){ 2425 uint16_t i; 2426 for (i=0; i < size ; i++){ 2427 if (data[i] != 0) { 2428 return false; 2429 } 2430 } 2431 return true; 2432 } 2433 2434 #endif 2435 2436 static void event_handler(uint8_t *packet, uint16_t size){ 2437 2438 uint16_t event_length = packet[1]; 2439 2440 // assert packet is complete 2441 if (size != (event_length + 2u)){ 2442 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2443 return; 2444 } 2445 2446 bd_addr_type_t addr_type; 2447 hci_con_handle_t handle; 2448 hci_connection_t * conn; 2449 int i; 2450 int create_connection_cmd; 2451 2452 #ifdef ENABLE_CLASSIC 2453 hci_link_type_t link_type; 2454 bd_addr_t addr; 2455 #endif 2456 2457 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2458 2459 switch (hci_event_packet_get_type(packet)) { 2460 2461 case HCI_EVENT_COMMAND_COMPLETE: 2462 handle_command_complete_event(packet, size); 2463 break; 2464 2465 case HCI_EVENT_COMMAND_STATUS: 2466 // get num cmd packets - limit to 1 to reduce complexity 2467 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2468 2469 // check command status to detected failed outgoing connections 2470 create_connection_cmd = 0; 2471 #ifdef ENABLE_CLASSIC 2472 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2473 create_connection_cmd = 1; 2474 } 2475 #endif 2476 #ifdef ENABLE_LE_CENTRAL 2477 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2478 create_connection_cmd = 1; 2479 } 2480 #endif 2481 if (create_connection_cmd) { 2482 uint8_t status = hci_event_command_status_get_status(packet); 2483 addr_type = hci_stack->outgoing_addr_type; 2484 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2485 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); 2486 2487 // reset outgoing address info 2488 memset(hci_stack->outgoing_addr, 0, 6); 2489 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2490 2491 // on error 2492 if (status != ERROR_CODE_SUCCESS){ 2493 #ifdef ENABLE_LE_CENTRAL 2494 if (hci_is_le_connection_type(addr_type)){ 2495 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2496 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2497 } 2498 #endif 2499 // error => outgoing connection failed 2500 if (conn != NULL){ 2501 hci_handle_connection_failed(conn, status); 2502 } 2503 } 2504 } 2505 2506 #ifdef ENABLE_CLASSIC 2507 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_inquiry)) { 2508 uint8_t status = hci_event_command_status_get_status(packet); 2509 log_info("command status (inquiry), status %x", status); 2510 if (status == ERROR_CODE_SUCCESS) { 2511 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 2512 } else { 2513 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2514 } 2515 } 2516 #endif 2517 break; 2518 2519 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2520 if (size < 3) return; 2521 uint16_t num_handles = packet[2]; 2522 if (size != (3u + num_handles * 4u)) return; 2523 uint16_t offset = 3; 2524 for (i=0; i<num_handles;i++){ 2525 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2526 offset += 2u; 2527 uint16_t num_packets = little_endian_read_16(packet, offset); 2528 offset += 2u; 2529 2530 conn = hci_connection_for_handle(handle); 2531 if (!conn){ 2532 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2533 continue; 2534 } 2535 2536 if (conn->num_packets_sent >= num_packets){ 2537 conn->num_packets_sent -= num_packets; 2538 } else { 2539 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2540 conn->num_packets_sent = 0; 2541 } 2542 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2543 2544 #ifdef ENABLE_CLASSIC 2545 // For SCO, we do the can_send_now_check here 2546 hci_notify_if_sco_can_send_now(); 2547 #endif 2548 } 2549 break; 2550 } 2551 2552 #ifdef ENABLE_CLASSIC 2553 case HCI_EVENT_INQUIRY_COMPLETE: 2554 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2555 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2556 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2557 hci_emit_event(event, sizeof(event), 1); 2558 } 2559 break; 2560 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2561 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2562 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2563 } 2564 break; 2565 case HCI_EVENT_CONNECTION_REQUEST: 2566 reverse_bd_addr(&packet[2], addr); 2567 link_type = (hci_link_type_t) packet[11]; 2568 2569 // CVE-2020-26555: reject incoming connection from device with same BD ADDR 2570 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0){ 2571 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2572 bd_addr_copy(hci_stack->decline_addr, addr); 2573 break; 2574 } 2575 2576 if (hci_stack->gap_classic_accept_callback != NULL){ 2577 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2578 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2579 bd_addr_copy(hci_stack->decline_addr, addr); 2580 break; 2581 } 2582 } 2583 2584 // TODO: eval COD 8-10 2585 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2586 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2587 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2588 if (!conn) { 2589 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2590 } 2591 if (!conn) { 2592 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2593 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2594 bd_addr_copy(hci_stack->decline_addr, addr); 2595 break; 2596 } 2597 conn->role = HCI_ROLE_SLAVE; 2598 conn->state = RECEIVED_CONNECTION_REQUEST; 2599 // store info about eSCO 2600 if (link_type == HCI_LINK_TYPE_ESCO){ 2601 conn->remote_supported_features[0] |= 1; 2602 } 2603 hci_run(); 2604 break; 2605 2606 case HCI_EVENT_CONNECTION_COMPLETE: 2607 // Connection management 2608 reverse_bd_addr(&packet[5], addr); 2609 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2610 addr_type = BD_ADDR_TYPE_ACL; 2611 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2612 if (conn) { 2613 if (!packet[2]){ 2614 conn->state = OPEN; 2615 conn->con_handle = little_endian_read_16(packet, 3); 2616 2617 // queue get remote feature 2618 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2619 2620 // queue set supervision timeout if we're master 2621 if ((hci_stack->link_supervision_timeout != HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT) && (conn->role == HCI_ROLE_MASTER)){ 2622 connectionSetAuthenticationFlags(conn, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 2623 } 2624 2625 // restart timer 2626 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2627 btstack_run_loop_add_timer(&conn->timeout); 2628 2629 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2630 2631 hci_emit_nr_connections_changed(); 2632 } else { 2633 // connection failed 2634 hci_handle_connection_failed(conn, packet[2]); 2635 } 2636 } 2637 break; 2638 2639 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2640 reverse_bd_addr(&packet[5], addr); 2641 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2642 if (packet[2]){ 2643 // connection failed 2644 break; 2645 } 2646 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2647 if (!conn) { 2648 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2649 } 2650 if (!conn) { 2651 break; 2652 } 2653 conn->state = OPEN; 2654 conn->con_handle = little_endian_read_16(packet, 3); 2655 2656 #ifdef ENABLE_SCO_OVER_HCI 2657 // update SCO 2658 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2659 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2660 } 2661 // trigger can send now 2662 if (hci_have_usb_transport()){ 2663 hci_stack->sco_can_send_now = 1; 2664 } 2665 #endif 2666 #ifdef HAVE_SCO_TRANSPORT 2667 // configure sco transport 2668 if (hci_stack->sco_transport != NULL){ 2669 sco_format_t sco_format = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? SCO_FORMAT_8_BIT : SCO_FORMAT_16_BIT; 2670 hci_stack->sco_transport->open(conn->con_handle, sco_format); 2671 } 2672 #endif 2673 break; 2674 2675 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2676 handle = little_endian_read_16(packet, 3); 2677 conn = hci_connection_for_handle(handle); 2678 if (!conn) break; 2679 if (!packet[2]){ 2680 const uint8_t * features = &packet[5]; 2681 hci_handle_remote_features_page_0(conn, features); 2682 2683 // read extended features if possible 2684 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2685 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2686 break; 2687 } 2688 } 2689 hci_handle_remote_features_received(conn); 2690 break; 2691 2692 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2693 handle = little_endian_read_16(packet, 3); 2694 conn = hci_connection_for_handle(handle); 2695 if (!conn) break; 2696 // status = ok, page = 1 2697 if (!packet[2]) { 2698 uint8_t page_number = packet[5]; 2699 uint8_t maximum_page_number = packet[6]; 2700 const uint8_t * features = &packet[7]; 2701 bool done = false; 2702 switch (page_number){ 2703 case 1: 2704 hci_handle_remote_features_page_1(conn, features); 2705 if (maximum_page_number >= 2){ 2706 // get Secure Connections (Controller) from Page 2 if available 2707 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2708 } else { 2709 // otherwise, assume SC (Controller) == SC (Host) 2710 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2711 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2712 } 2713 done = true; 2714 } 2715 break; 2716 case 2: 2717 hci_handle_remote_features_page_2(conn, features); 2718 done = true; 2719 break; 2720 default: 2721 break; 2722 } 2723 if (!done) break; 2724 } 2725 hci_handle_remote_features_received(conn); 2726 break; 2727 2728 case HCI_EVENT_LINK_KEY_REQUEST: 2729 // request handled by hci_run() 2730 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 2731 break; 2732 2733 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2734 hci_event_link_key_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_complete(conn, ERROR_CODE_SUCCESS); 2739 2740 // CVE-2020-26555: ignore NULL link key 2741 // default link_key_type = INVALID_LINK_KEY asserts that NULL key won't be used for encryption 2742 if (btstack_is_null(&packet[8], 16)) break; 2743 2744 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2745 // Change Connection Encryption keeps link key type 2746 if (link_key_type != CHANGED_COMBINATION_KEY){ 2747 conn->link_key_type = link_key_type; 2748 } 2749 2750 // cache link key. link keys stored in little-endian format for legacy reasons 2751 memcpy(&conn->link_key, &packet[8], 16); 2752 2753 // only store link key: 2754 // - if bondable enabled 2755 if (hci_stack->bondable == false) break; 2756 // - if security level sufficient 2757 if (gap_security_level_for_link_key_type(link_key_type) < conn->requested_security_level) break; 2758 // - for SSP, also check if remote side requested bonding as well 2759 if (conn->link_key_type != COMBINATION_KEY){ 2760 bool remote_bonding = conn->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 2761 if (!remote_bonding){ 2762 break; 2763 } 2764 } 2765 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2766 break; 2767 } 2768 2769 case HCI_EVENT_PIN_CODE_REQUEST: 2770 hci_event_pin_code_request_get_bd_addr(packet, addr); 2771 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2772 if (!conn) break; 2773 2774 hci_pairing_started(conn, false); 2775 // abort pairing if: non-bondable mode (pin code request is not forwarded to app) 2776 if (!hci_stack->bondable ){ 2777 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2778 hci_pairing_complete(conn, ERROR_CODE_PAIRING_NOT_ALLOWED); 2779 hci_run(); 2780 return; 2781 } 2782 // abort pairing if: LEVEL_4 required (pin code request is not forwarded to app) 2783 if ((hci_stack->gap_secure_connections_only_mode) || (conn->requested_security_level == LEVEL_4)){ 2784 log_info("Level 4 required, but SC not supported -> abort"); 2785 conn->authentication_flags |= AUTH_FLAG_DENY_PIN_CODE_REQUEST; 2786 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2787 hci_run(); 2788 return; 2789 } 2790 break; 2791 2792 case HCI_EVENT_IO_CAPABILITY_RESPONSE: 2793 hci_event_io_capability_response_get_bd_addr(packet, addr); 2794 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2795 if (!conn) break; 2796 2797 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE); 2798 hci_pairing_started(conn, true); 2799 conn->io_cap_response_auth_req = hci_event_io_capability_response_get_authentication_requirements(packet); 2800 conn->io_cap_response_io = hci_event_io_capability_response_get_io_capability(packet); 2801 break; 2802 2803 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2804 hci_event_io_capability_response_get_bd_addr(packet, addr); 2805 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2806 if (!conn) break; 2807 2808 hci_connection_timestamp(conn); 2809 2810 hci_pairing_started(conn, true); 2811 2812 // assess security 2813 if ((hci_stack->gap_secure_connections_only_mode || (conn->requested_security_level == LEVEL_4)) && !hci_remote_sc_enabled(conn)){ 2814 log_info("Level 4 required, but SC not supported -> abort"); 2815 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2816 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2817 break; 2818 } 2819 2820 #ifndef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 2821 if (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN){ 2822 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 2823 } else { 2824 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 2825 } 2826 #endif 2827 break; 2828 2829 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2830 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2831 hci_event_remote_oob_data_request_get_bd_addr(packet, addr); 2832 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2833 if (!conn) break; 2834 2835 hci_connection_timestamp(conn); 2836 2837 hci_pairing_started(conn, true); 2838 2839 connectionSetAuthenticationFlags(conn, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 2840 break; 2841 #endif 2842 2843 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2844 hci_event_user_confirmation_request_get_bd_addr(packet, addr); 2845 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2846 if (!conn) break; 2847 if (hci_ssp_security_level_possible_for_io_cap(conn->requested_security_level, hci_stack->ssp_io_capability, conn->io_cap_response_io)) { 2848 if (hci_stack->ssp_auto_accept){ 2849 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 2850 }; 2851 } else { 2852 hci_pairing_complete(conn, ERROR_CODE_INSUFFICIENT_SECURITY); 2853 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 2854 // don't forward event to app 2855 hci_run(); 2856 return; 2857 } 2858 break; 2859 2860 case HCI_EVENT_USER_PASSKEY_REQUEST: 2861 // Pairing using Passkey results in MITM protection. If Level 4 is required, support for SC is validated on IO Cap Request 2862 if (hci_stack->ssp_auto_accept){ 2863 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 2864 }; 2865 break; 2866 2867 case HCI_EVENT_MODE_CHANGE: 2868 handle = hci_event_mode_change_get_handle(packet); 2869 conn = hci_connection_for_handle(handle); 2870 if (!conn) break; 2871 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2872 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2873 break; 2874 #endif 2875 2876 case HCI_EVENT_ENCRYPTION_CHANGE: 2877 handle = hci_event_encryption_change_get_connection_handle(packet); 2878 conn = hci_connection_for_handle(handle); 2879 if (!conn) break; 2880 if (hci_event_encryption_change_get_status(packet) == 0u) { 2881 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2882 if (encryption_enabled){ 2883 if (hci_is_le_connection(conn)){ 2884 // For LE, we accept connection as encrypted 2885 conn->authentication_flags |= AUTH_FLAG_CONNECTION_ENCRYPTED; 2886 } 2887 #ifdef ENABLE_CLASSIC 2888 else { 2889 2890 // dedicated bonding: send result and disconnect 2891 if (conn->bonding_flags & BONDING_DEDICATED){ 2892 conn->bonding_flags &= ~BONDING_DEDICATED; 2893 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2894 conn->bonding_status = packet[2]; 2895 break; 2896 } 2897 2898 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2899 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2900 bool connected_uses_aes_ccm = encryption_enabled == 2; 2901 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2902 log_info("SC during pairing, but only E0 now -> abort"); 2903 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2904 break; 2905 } 2906 2907 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2908 if (connected_uses_aes_ccm){ 2909 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2910 } 2911 2912 #ifdef ENABLE_TESTING_SUPPORT 2913 // work around for issue with PTS dongle 2914 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2915 #endif 2916 2917 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2918 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2919 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2920 } else { 2921 // if not, pretend everything is perfect 2922 hci_handle_read_encryption_key_size_complete(conn, 16); 2923 } 2924 } 2925 #endif 2926 } else { 2927 conn->authentication_flags &= ~AUTH_FLAG_CONNECTION_ENCRYPTED; 2928 } 2929 } 2930 2931 break; 2932 2933 #ifdef ENABLE_CLASSIC 2934 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2935 handle = hci_event_authentication_complete_get_connection_handle(packet); 2936 conn = hci_connection_for_handle(handle); 2937 if (!conn) break; 2938 2939 // clear authentication active flag 2940 conn->bonding_flags &= ~BONDING_SENT_AUTHENTICATE_REQUEST; 2941 hci_pairing_complete(conn, hci_event_authentication_complete_get_status(packet)); 2942 2943 // authenticated only if auth status == 0 2944 if (hci_event_authentication_complete_get_status(packet) == 0){ 2945 // authenticated 2946 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2947 2948 // If not already encrypted, start encryption 2949 if ((conn->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0){ 2950 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2951 break; 2952 } 2953 } 2954 2955 // emit updated security level 2956 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2957 break; 2958 2959 case HCI_EVENT_SIMPLE_PAIRING_COMPLETE: 2960 hci_event_simple_pairing_complete_get_bd_addr(packet, addr); 2961 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2962 if (!conn) break; 2963 2964 // treat successfully paired connection as authenticated 2965 if (hci_event_simple_pairing_complete_get_status(packet) == ERROR_CODE_SUCCESS){ 2966 conn->authentication_flags |= AUTH_FLAG_CONNECTION_AUTHENTICATED; 2967 } 2968 2969 hci_pairing_complete(conn, hci_event_simple_pairing_complete_get_status(packet)); 2970 break; 2971 #endif 2972 2973 // HCI_EVENT_DISCONNECTION_COMPLETE 2974 // has been split, to first notify stack before shutting connection down 2975 // see end of function, too. 2976 case HCI_EVENT_DISCONNECTION_COMPLETE: 2977 if (packet[2]) break; // status != 0 2978 handle = little_endian_read_16(packet, 3); 2979 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2980 if (hci_stack->acl_fragmentation_total_size > 0u) { 2981 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2982 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2983 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2984 hci_stack->acl_fragmentation_total_size = 0; 2985 hci_stack->acl_fragmentation_pos = 0; 2986 if (release_buffer){ 2987 hci_release_packet_buffer(); 2988 } 2989 } 2990 } 2991 2992 conn = hci_connection_for_handle(handle); 2993 if (!conn) break; 2994 #ifdef ENABLE_CLASSIC 2995 // pairing failed if it was ongoing 2996 hci_pairing_complete(conn, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 2997 #endif 2998 // mark connection for shutdown 2999 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 3000 3001 // emit dedicatd bonding event 3002 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 3003 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 3004 } 3005 3006 #ifdef ENABLE_BLE 3007 #ifdef ENABLE_LE_PERIPHERAL 3008 // re-enable advertisements for le connections if active 3009 if (hci_is_le_connection(conn)){ 3010 hci_update_advertisements_enabled_for_current_roles(); 3011 } 3012 #endif 3013 #endif 3014 break; 3015 3016 case HCI_EVENT_HARDWARE_ERROR: 3017 log_error("Hardware Error: 0x%02x", packet[2]); 3018 if (hci_stack->hardware_error_callback){ 3019 (*hci_stack->hardware_error_callback)(packet[2]); 3020 } else { 3021 // if no special requests, just reboot stack 3022 hci_power_control_off(); 3023 hci_power_control_on(); 3024 } 3025 break; 3026 3027 #ifdef ENABLE_CLASSIC 3028 case HCI_EVENT_ROLE_CHANGE: 3029 if (packet[2]) break; // status != 0 3030 reverse_bd_addr(&packet[3], addr); 3031 addr_type = BD_ADDR_TYPE_ACL; 3032 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 3033 if (!conn) break; 3034 conn->role = packet[9]; 3035 break; 3036 #endif 3037 3038 case HCI_EVENT_TRANSPORT_PACKET_SENT: 3039 // release packet buffer only for asynchronous transport and if there are not further fragements 3040 if (hci_transport_synchronous()) { 3041 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 3042 return; // instead of break: to avoid re-entering hci_run() 3043 } 3044 hci_stack->acl_fragmentation_tx_active = 0; 3045 if (hci_stack->acl_fragmentation_total_size) break; 3046 hci_release_packet_buffer(); 3047 3048 // L2CAP receives this event via the hci_emit_event below 3049 3050 #ifdef ENABLE_CLASSIC 3051 // For SCO, we do the can_send_now_check here 3052 hci_notify_if_sco_can_send_now(); 3053 #endif 3054 break; 3055 3056 #ifdef ENABLE_CLASSIC 3057 case HCI_EVENT_SCO_CAN_SEND_NOW: 3058 // For SCO, we do the can_send_now_check here 3059 hci_stack->sco_can_send_now = 1; 3060 hci_notify_if_sco_can_send_now(); 3061 return; 3062 3063 // explode inquriy results for easier consumption 3064 case HCI_EVENT_INQUIRY_RESULT: 3065 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 3066 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 3067 gap_inquiry_explode(packet, size); 3068 break; 3069 #endif 3070 3071 #ifdef ENABLE_BLE 3072 case HCI_EVENT_LE_META: 3073 switch (packet[2]){ 3074 #ifdef ENABLE_LE_CENTRAL 3075 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 3076 // log_info("advertising report received"); 3077 if (!hci_stack->le_scanning_enabled) break; 3078 le_handle_advertisement_report(packet, size); 3079 break; 3080 #endif 3081 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 3082 event_handle_le_connection_complete(packet); 3083 break; 3084 3085 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 3086 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 3087 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 3088 conn = hci_connection_for_handle(handle); 3089 if (!conn) break; 3090 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 3091 break; 3092 3093 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 3094 // connection 3095 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 3096 conn = hci_connection_for_handle(handle); 3097 if (conn) { 3098 // read arguments 3099 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 3100 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 3101 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 3102 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 3103 3104 // validate against current connection parameter range 3105 le_connection_parameter_range_t existing_range; 3106 gap_get_connection_parameter_range(&existing_range); 3107 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 3108 if (update_parameter){ 3109 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 3110 conn->le_conn_interval_min = le_conn_interval_min; 3111 conn->le_conn_interval_max = le_conn_interval_max; 3112 conn->le_conn_latency = le_conn_latency; 3113 conn->le_supervision_timeout = le_supervision_timeout; 3114 } else { 3115 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 3116 } 3117 } 3118 break; 3119 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 3120 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 3121 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 3122 conn = hci_connection_for_handle(handle); 3123 if (conn) { 3124 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 3125 } 3126 break; 3127 #endif 3128 default: 3129 break; 3130 } 3131 break; 3132 #endif 3133 case HCI_EVENT_VENDOR_SPECIFIC: 3134 // Vendor specific commands often create vendor specific event instead of num completed packets 3135 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 3136 switch (hci_stack->manufacturer){ 3137 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 3138 hci_stack->num_cmd_packets = 1; 3139 break; 3140 default: 3141 break; 3142 } 3143 break; 3144 default: 3145 break; 3146 } 3147 3148 handle_event_for_current_stack_state(packet, size); 3149 3150 // notify upper stack 3151 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 3152 3153 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 3154 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 3155 handle = little_endian_read_16(packet, 3); 3156 hci_connection_t * aConn = hci_connection_for_handle(handle); 3157 // discard connection if app did not trigger a reconnect in the event handler 3158 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 3159 hci_shutdown_connection(aConn); 3160 } 3161 } 3162 3163 // execute main loop 3164 hci_run(); 3165 } 3166 3167 #ifdef ENABLE_CLASSIC 3168 3169 #ifdef ENABLE_SCO_OVER_HCI 3170 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 3171 static void sco_schedule_tx(hci_connection_t * conn); 3172 3173 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 3174 log_debug("SCO TX Timeout"); 3175 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 3176 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3177 if (!conn) return; 3178 3179 // trigger send 3180 conn->sco_tx_ready = 1; 3181 // extra packet if CVSD but SCO buffer is too short 3182 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 3183 conn->sco_tx_ready++; 3184 } 3185 hci_notify_if_sco_can_send_now(); 3186 } 3187 3188 3189 #define SCO_TX_AFTER_RX_MS (6) 3190 3191 static void sco_schedule_tx(hci_connection_t * conn){ 3192 3193 uint32_t now = btstack_run_loop_get_time_ms(); 3194 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 3195 int time_delta_ms = sco_tx_ms - now; 3196 3197 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 3198 3199 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 3200 btstack_run_loop_remove_timer(timer); 3201 btstack_run_loop_set_timer(timer, time_delta_ms); 3202 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 3203 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 3204 btstack_run_loop_add_timer(timer); 3205 } 3206 #endif 3207 3208 static void sco_handler(uint8_t * packet, uint16_t size){ 3209 // lookup connection struct 3210 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 3211 hci_connection_t * conn = hci_connection_for_handle(con_handle); 3212 if (!conn) return; 3213 3214 #ifdef ENABLE_SCO_OVER_HCI 3215 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 3216 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 3217 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 3218 packet[2] = 0x3c; 3219 memmove(&packet[3], &packet[23], 63); 3220 size = 63; 3221 } 3222 } 3223 3224 if (hci_have_usb_transport()){ 3225 // Nothing to do 3226 } else { 3227 // 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); 3228 if (hci_stack->synchronous_flow_control_enabled == 0){ 3229 uint32_t now = btstack_run_loop_get_time_ms(); 3230 3231 if (!conn->sco_rx_valid){ 3232 // ignore first 10 packets 3233 conn->sco_rx_count++; 3234 // log_debug("sco rx count %u", conn->sco_rx_count); 3235 if (conn->sco_rx_count == 10) { 3236 // use first timestamp as is and pretent it just started 3237 conn->sco_rx_ms = now; 3238 conn->sco_rx_valid = 1; 3239 conn->sco_rx_count = 0; 3240 sco_schedule_tx(conn); 3241 } 3242 } else { 3243 // track expected arrival timme 3244 conn->sco_rx_count++; 3245 conn->sco_rx_ms += 7; 3246 int delta = (int32_t) (now - conn->sco_rx_ms); 3247 if (delta > 0){ 3248 conn->sco_rx_ms++; 3249 } 3250 // log_debug("sco rx %u", conn->sco_rx_ms); 3251 sco_schedule_tx(conn); 3252 } 3253 } 3254 } 3255 #endif 3256 3257 // deliver to app 3258 if (hci_stack->sco_packet_handler) { 3259 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 3260 } 3261 3262 #ifdef HAVE_SCO_TRANSPORT 3263 // We can send one packet for each received packet 3264 conn->sco_tx_ready++; 3265 hci_notify_if_sco_can_send_now(); 3266 #endif 3267 3268 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3269 conn->num_packets_completed++; 3270 hci_stack->host_completed_packets = 1; 3271 hci_run(); 3272 #endif 3273 } 3274 #endif 3275 3276 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 3277 hci_dump_packet(packet_type, 1, packet, size); 3278 switch (packet_type) { 3279 case HCI_EVENT_PACKET: 3280 event_handler(packet, size); 3281 break; 3282 case HCI_ACL_DATA_PACKET: 3283 acl_handler(packet, size); 3284 break; 3285 #ifdef ENABLE_CLASSIC 3286 case HCI_SCO_DATA_PACKET: 3287 sco_handler(packet, size); 3288 break; 3289 #endif 3290 default: 3291 break; 3292 } 3293 } 3294 3295 /** 3296 * @brief Add event packet handler. 3297 */ 3298 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 3299 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 3300 } 3301 3302 3303 /** Register HCI packet handlers */ 3304 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3305 hci_stack->acl_packet_handler = handler; 3306 } 3307 3308 #ifdef ENABLE_CLASSIC 3309 /** 3310 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3311 */ 3312 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3313 hci_stack->sco_packet_handler = handler; 3314 } 3315 #endif 3316 3317 static void hci_state_reset(void){ 3318 // no connections yet 3319 hci_stack->connections = NULL; 3320 3321 // keep discoverable/connectable as this has been requested by the client(s) 3322 // hci_stack->discoverable = 0; 3323 // hci_stack->connectable = 0; 3324 // hci_stack->bondable = 1; 3325 // hci_stack->own_addr_type = 0; 3326 3327 // buffer is free 3328 hci_stack->hci_packet_buffer_reserved = 0; 3329 3330 // no pending cmds 3331 hci_stack->decline_reason = 0; 3332 hci_stack->new_scan_enable_value = 0xff; 3333 3334 hci_stack->secure_connections_active = false; 3335 3336 #ifdef ENABLE_CLASSIC 3337 hci_stack->new_page_scan_interval = 0xffff; 3338 hci_stack->new_page_scan_window = 0xffff; 3339 hci_stack->new_page_scan_type = 0xff; 3340 hci_stack->inquiry_lap = GAP_IAC_GENERAL_INQUIRY; 3341 #endif 3342 3343 #ifdef ENABLE_CLASSIC_PAIRING_OOB 3344 hci_stack->classic_read_local_oob_data = true; 3345 hci_stack->classic_oob_con_handle = HCI_CON_HANDLE_INVALID; 3346 #endif 3347 3348 // LE 3349 #ifdef ENABLE_BLE 3350 memset(hci_stack->le_random_address, 0, 6); 3351 hci_stack->le_random_address_set = 0; 3352 #endif 3353 #ifdef ENABLE_LE_CENTRAL 3354 hci_stack->le_scanning_active = false; 3355 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3356 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3357 hci_stack->le_whitelist_capacity = 0; 3358 #endif 3359 #ifdef ENABLE_LE_PERIPHERAL 3360 hci_stack->le_advertisements_active = false; 3361 if ((hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_PARAMS_SET) != 0){ 3362 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3363 } 3364 if (hci_stack->le_advertisements_data != NULL){ 3365 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3366 } 3367 #endif 3368 } 3369 3370 #ifdef ENABLE_CLASSIC 3371 /** 3372 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3373 */ 3374 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3375 // store and open remote device db 3376 hci_stack->link_key_db = link_key_db; 3377 if (hci_stack->link_key_db) { 3378 hci_stack->link_key_db->open(); 3379 } 3380 } 3381 #endif 3382 3383 void hci_init(const hci_transport_t *transport, const void *config){ 3384 3385 #ifdef HAVE_MALLOC 3386 if (!hci_stack) { 3387 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3388 } 3389 #else 3390 hci_stack = &hci_stack_static; 3391 #endif 3392 memset(hci_stack, 0, sizeof(hci_stack_t)); 3393 3394 // reference to use transport layer implementation 3395 hci_stack->hci_transport = transport; 3396 3397 // reference to used config 3398 hci_stack->config = config; 3399 3400 // setup pointer for outgoing packet buffer 3401 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3402 3403 // max acl payload size defined in config.h 3404 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3405 3406 // register packet handlers with transport 3407 transport->register_packet_handler(&packet_handler); 3408 3409 hci_stack->state = HCI_STATE_OFF; 3410 3411 // class of device 3412 hci_stack->class_of_device = 0x007a020c; // Smartphone 3413 3414 // bondable by default 3415 hci_stack->bondable = 1; 3416 3417 #ifdef ENABLE_CLASSIC 3418 // classic name 3419 hci_stack->local_name = default_classic_name; 3420 3421 // Master slave policy 3422 hci_stack->master_slave_policy = 1; 3423 3424 // Allow Role Switch 3425 hci_stack->allow_role_switch = 1; 3426 3427 // Default / minimum security level = 2 3428 hci_stack->gap_security_level = LEVEL_2; 3429 3430 // Default Security Mode 4 3431 hci_stack->gap_security_mode = GAP_SECURITY_MODE_4; 3432 3433 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3434 hci_stack->gap_required_encyrption_key_size = 7; 3435 3436 // Link Supervision Timeout 3437 hci_stack->link_supervision_timeout = HCI_LINK_SUPERVISION_TIMEOUT_DEFAULT; 3438 3439 #endif 3440 3441 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3442 hci_stack->ssp_enable = 1; 3443 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3444 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3445 hci_stack->ssp_auto_accept = 1; 3446 3447 // Secure Connections: enable (requires support from Controller) 3448 hci_stack->secure_connections_enable = true; 3449 3450 // voice setting - signed 16 bit pcm data with CVSD over the air 3451 hci_stack->sco_voice_setting = 0x60; 3452 3453 #ifdef ENABLE_LE_CENTRAL 3454 // connection parameter to use for outgoing connections 3455 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3456 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3457 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3458 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3459 hci_stack->le_connection_latency = 4; // 4 3460 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3461 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3462 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3463 3464 // default LE Scanning 3465 hci_stack->le_scan_type = 0x1; // active 3466 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3467 hci_stack->le_scan_window = 0x30; // 30 ms 3468 #endif 3469 3470 #ifdef ENABLE_LE_PERIPHERAL 3471 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3472 #endif 3473 3474 // connection parameter range used to answer connection parameter update requests in l2cap 3475 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3476 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3477 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3478 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3479 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3480 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3481 3482 hci_state_reset(); 3483 } 3484 3485 void hci_deinit(void){ 3486 #ifdef HAVE_MALLOC 3487 if (hci_stack) { 3488 free(hci_stack); 3489 } 3490 #endif 3491 hci_stack = NULL; 3492 3493 #ifdef ENABLE_CLASSIC 3494 disable_l2cap_timeouts = 0; 3495 #endif 3496 } 3497 3498 /** 3499 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3500 */ 3501 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3502 hci_stack->chipset = chipset_driver; 3503 3504 // reset chipset driver - init is also called on power_up 3505 if (hci_stack->chipset && hci_stack->chipset->init){ 3506 hci_stack->chipset->init(hci_stack->config); 3507 } 3508 } 3509 3510 /** 3511 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3512 */ 3513 void hci_set_control(const btstack_control_t *hardware_control){ 3514 // references to used control implementation 3515 hci_stack->control = hardware_control; 3516 // init with transport config 3517 hardware_control->init(hci_stack->config); 3518 } 3519 3520 void hci_close(void){ 3521 3522 #ifdef ENABLE_CLASSIC 3523 // close remote device db 3524 if (hci_stack->link_key_db) { 3525 hci_stack->link_key_db->close(); 3526 } 3527 #endif 3528 3529 btstack_linked_list_iterator_t lit; 3530 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3531 while (btstack_linked_list_iterator_has_next(&lit)){ 3532 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3533 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3534 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3535 hci_shutdown_connection(connection); 3536 } 3537 3538 hci_power_control(HCI_POWER_OFF); 3539 3540 #ifdef HAVE_MALLOC 3541 free(hci_stack); 3542 #endif 3543 hci_stack = NULL; 3544 } 3545 3546 #ifdef HAVE_SCO_TRANSPORT 3547 void hci_set_sco_transport(const btstack_sco_transport_t *sco_transport){ 3548 hci_stack->sco_transport = sco_transport; 3549 sco_transport->register_packet_handler(&packet_handler); 3550 } 3551 #endif 3552 3553 #ifdef ENABLE_CLASSIC 3554 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3555 // validate ranage and set 3556 if (encryption_key_size < 7) return; 3557 if (encryption_key_size > 16) return; 3558 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3559 } 3560 3561 uint8_t gap_set_security_mode(gap_security_mode_t security_mode){ 3562 if ((security_mode == GAP_SECURITY_MODE_4) || (security_mode == GAP_SECURITY_MODE_2)){ 3563 hci_stack->gap_security_mode = security_mode; 3564 return ERROR_CODE_SUCCESS; 3565 } else { 3566 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 3567 } 3568 } 3569 3570 gap_security_mode_t gap_get_security_mode(void){ 3571 return hci_stack->gap_security_mode; 3572 } 3573 3574 void gap_set_security_level(gap_security_level_t security_level){ 3575 hci_stack->gap_security_level = security_level; 3576 } 3577 3578 gap_security_level_t gap_get_security_level(void){ 3579 if (hci_stack->gap_secure_connections_only_mode){ 3580 return LEVEL_4; 3581 } 3582 return hci_stack->gap_security_level; 3583 } 3584 3585 void gap_set_minimal_service_security_level(gap_security_level_t security_level){ 3586 hci_stack->gap_minimal_service_security_level = security_level; 3587 } 3588 3589 void gap_set_secure_connections_only_mode(bool enable){ 3590 hci_stack->gap_secure_connections_only_mode = enable; 3591 } 3592 3593 bool gap_get_secure_connections_only_mode(void){ 3594 return hci_stack->gap_secure_connections_only_mode; 3595 } 3596 #endif 3597 3598 #ifdef ENABLE_CLASSIC 3599 void gap_set_class_of_device(uint32_t class_of_device){ 3600 hci_stack->class_of_device = class_of_device; 3601 } 3602 3603 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3604 hci_stack->default_link_policy_settings = default_link_policy_settings; 3605 } 3606 3607 void gap_set_allow_role_switch(bool allow_role_switch){ 3608 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3609 } 3610 3611 uint8_t hci_get_allow_role_switch(void){ 3612 return hci_stack->allow_role_switch; 3613 } 3614 3615 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3616 hci_stack->link_supervision_timeout = link_supervision_timeout; 3617 } 3618 3619 void hci_disable_l2cap_timeout_check(void){ 3620 disable_l2cap_timeouts = 1; 3621 } 3622 #endif 3623 3624 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3625 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3626 void hci_set_bd_addr(bd_addr_t addr){ 3627 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3628 hci_stack->custom_bd_addr_set = 1; 3629 } 3630 #endif 3631 3632 // State-Module-Driver overview 3633 // state module low-level 3634 // HCI_STATE_OFF off close 3635 // HCI_STATE_INITIALIZING, on open 3636 // HCI_STATE_WORKING, on open 3637 // HCI_STATE_HALTING, on open 3638 // HCI_STATE_SLEEPING, off/sleep close 3639 // HCI_STATE_FALLING_ASLEEP on open 3640 3641 static int hci_power_control_on(void){ 3642 3643 // power on 3644 int err = 0; 3645 if (hci_stack->control && hci_stack->control->on){ 3646 err = (*hci_stack->control->on)(); 3647 } 3648 if (err){ 3649 log_error( "POWER_ON failed"); 3650 hci_emit_hci_open_failed(); 3651 return err; 3652 } 3653 3654 // int chipset driver 3655 if (hci_stack->chipset && hci_stack->chipset->init){ 3656 hci_stack->chipset->init(hci_stack->config); 3657 } 3658 3659 // init transport 3660 if (hci_stack->hci_transport->init){ 3661 hci_stack->hci_transport->init(hci_stack->config); 3662 } 3663 3664 // open transport 3665 err = hci_stack->hci_transport->open(); 3666 if (err){ 3667 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3668 if (hci_stack->control && hci_stack->control->off){ 3669 (*hci_stack->control->off)(); 3670 } 3671 hci_emit_hci_open_failed(); 3672 return err; 3673 } 3674 return 0; 3675 } 3676 3677 static void hci_power_control_off(void){ 3678 3679 log_info("hci_power_control_off"); 3680 3681 // close low-level device 3682 hci_stack->hci_transport->close(); 3683 3684 log_info("hci_power_control_off - hci_transport closed"); 3685 3686 // power off 3687 if (hci_stack->control && hci_stack->control->off){ 3688 (*hci_stack->control->off)(); 3689 } 3690 3691 log_info("hci_power_control_off - control closed"); 3692 3693 hci_stack->state = HCI_STATE_OFF; 3694 } 3695 3696 static void hci_power_control_sleep(void){ 3697 3698 log_info("hci_power_control_sleep"); 3699 3700 #if 0 3701 // don't close serial port during sleep 3702 3703 // close low-level device 3704 hci_stack->hci_transport->close(hci_stack->config); 3705 #endif 3706 3707 // sleep mode 3708 if (hci_stack->control && hci_stack->control->sleep){ 3709 (*hci_stack->control->sleep)(); 3710 } 3711 3712 hci_stack->state = HCI_STATE_SLEEPING; 3713 } 3714 3715 static int hci_power_control_wake(void){ 3716 3717 log_info("hci_power_control_wake"); 3718 3719 // wake on 3720 if (hci_stack->control && hci_stack->control->wake){ 3721 (*hci_stack->control->wake)(); 3722 } 3723 3724 #if 0 3725 // open low-level device 3726 int err = hci_stack->hci_transport->open(hci_stack->config); 3727 if (err){ 3728 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3729 if (hci_stack->control && hci_stack->control->off){ 3730 (*hci_stack->control->off)(); 3731 } 3732 hci_emit_hci_open_failed(); 3733 return err; 3734 } 3735 #endif 3736 3737 return 0; 3738 } 3739 3740 static void hci_power_transition_to_initializing(void){ 3741 // set up state machine 3742 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3743 hci_stack->hci_packet_buffer_reserved = 0; 3744 hci_stack->state = HCI_STATE_INITIALIZING; 3745 hci_stack->substate = HCI_INIT_SEND_RESET; 3746 } 3747 3748 // returns error 3749 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3750 int err; 3751 switch (power_mode){ 3752 case HCI_POWER_ON: 3753 err = hci_power_control_on(); 3754 if (err != 0) { 3755 log_error("hci_power_control_on() error %d", err); 3756 return err; 3757 } 3758 hci_power_transition_to_initializing(); 3759 break; 3760 case HCI_POWER_OFF: 3761 // do nothing 3762 break; 3763 case HCI_POWER_SLEEP: 3764 // do nothing (with SLEEP == OFF) 3765 break; 3766 default: 3767 btstack_assert(false); 3768 break; 3769 } 3770 return ERROR_CODE_SUCCESS; 3771 } 3772 3773 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3774 switch (power_mode){ 3775 case HCI_POWER_ON: 3776 // do nothing 3777 break; 3778 case HCI_POWER_OFF: 3779 // no connections yet, just turn it off 3780 hci_power_control_off(); 3781 break; 3782 case HCI_POWER_SLEEP: 3783 // no connections yet, just turn it off 3784 hci_power_control_sleep(); 3785 break; 3786 default: 3787 btstack_assert(false); 3788 break; 3789 } 3790 return ERROR_CODE_SUCCESS; 3791 } 3792 3793 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3794 switch (power_mode){ 3795 case HCI_POWER_ON: 3796 // do nothing 3797 break; 3798 case HCI_POWER_OFF: 3799 // see hci_run 3800 hci_stack->state = HCI_STATE_HALTING; 3801 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3802 break; 3803 case HCI_POWER_SLEEP: 3804 // see hci_run 3805 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3806 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3807 break; 3808 default: 3809 btstack_assert(false); 3810 break; 3811 } 3812 return ERROR_CODE_SUCCESS; 3813 } 3814 3815 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3816 switch (power_mode){ 3817 case HCI_POWER_ON: 3818 hci_power_transition_to_initializing(); 3819 break; 3820 case HCI_POWER_OFF: 3821 // do nothing 3822 break; 3823 case HCI_POWER_SLEEP: 3824 // see hci_run 3825 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3826 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3827 break; 3828 default: 3829 btstack_assert(false); 3830 break; 3831 } 3832 return ERROR_CODE_SUCCESS; 3833 } 3834 3835 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3836 switch (power_mode){ 3837 case HCI_POWER_ON: 3838 3839 #ifdef HAVE_PLATFORM_IPHONE_OS 3840 // nothing to do, if H4 supports power management 3841 if (btstack_control_iphone_power_management_enabled()){ 3842 hci_stack->state = HCI_STATE_INITIALIZING; 3843 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3844 break; 3845 } 3846 #endif 3847 hci_power_transition_to_initializing(); 3848 break; 3849 case HCI_POWER_OFF: 3850 // see hci_run 3851 hci_stack->state = HCI_STATE_HALTING; 3852 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3853 break; 3854 case HCI_POWER_SLEEP: 3855 // do nothing 3856 break; 3857 default: 3858 btstack_assert(false); 3859 break; 3860 } 3861 return ERROR_CODE_SUCCESS; 3862 } 3863 3864 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3865 int err; 3866 switch (power_mode){ 3867 case HCI_POWER_ON: 3868 #ifdef HAVE_PLATFORM_IPHONE_OS 3869 // nothing to do, if H4 supports power management 3870 if (btstack_control_iphone_power_management_enabled()){ 3871 hci_stack->state = HCI_STATE_INITIALIZING; 3872 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3873 hci_update_scan_enable(); 3874 break; 3875 } 3876 #endif 3877 err = hci_power_control_wake(); 3878 if (err) return err; 3879 hci_power_transition_to_initializing(); 3880 break; 3881 case HCI_POWER_OFF: 3882 hci_stack->state = HCI_STATE_HALTING; 3883 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3884 break; 3885 case HCI_POWER_SLEEP: 3886 // do nothing 3887 break; 3888 default: 3889 btstack_assert(false); 3890 break; 3891 } 3892 return ERROR_CODE_SUCCESS; 3893 } 3894 3895 int hci_power_control(HCI_POWER_MODE power_mode){ 3896 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3897 int err = 0; 3898 switch (hci_stack->state){ 3899 case HCI_STATE_OFF: 3900 err = hci_power_control_state_off(power_mode); 3901 break; 3902 case HCI_STATE_INITIALIZING: 3903 err = hci_power_control_state_initializing(power_mode); 3904 break; 3905 case HCI_STATE_WORKING: 3906 err = hci_power_control_state_working(power_mode); 3907 break; 3908 case HCI_STATE_HALTING: 3909 err = hci_power_control_state_halting(power_mode); 3910 break; 3911 case HCI_STATE_FALLING_ASLEEP: 3912 err = hci_power_control_state_falling_asleep(power_mode); 3913 break; 3914 case HCI_STATE_SLEEPING: 3915 err = hci_power_control_state_sleeping(power_mode); 3916 break; 3917 default: 3918 btstack_assert(false); 3919 break; 3920 } 3921 if (err != 0){ 3922 return err; 3923 } 3924 3925 // create internal event 3926 hci_emit_state(); 3927 3928 // trigger next/first action 3929 hci_run(); 3930 3931 return 0; 3932 } 3933 3934 3935 #ifdef ENABLE_CLASSIC 3936 3937 static void hci_update_scan_enable(void){ 3938 // 2 = page scan, 1 = inq scan 3939 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3940 hci_run(); 3941 } 3942 3943 void gap_discoverable_control(uint8_t enable){ 3944 if (enable) enable = 1; // normalize argument 3945 3946 if (hci_stack->discoverable == enable){ 3947 hci_emit_discoverable_enabled(hci_stack->discoverable); 3948 return; 3949 } 3950 3951 hci_stack->discoverable = enable; 3952 hci_update_scan_enable(); 3953 } 3954 3955 void gap_connectable_control(uint8_t enable){ 3956 if (enable) enable = 1; // normalize argument 3957 3958 // don't emit event 3959 if (hci_stack->connectable == enable) return; 3960 3961 hci_stack->connectable = enable; 3962 hci_update_scan_enable(); 3963 } 3964 #endif 3965 3966 void gap_local_bd_addr(bd_addr_t address_buffer){ 3967 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3968 } 3969 3970 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3971 static void hci_host_num_completed_packets(void){ 3972 3973 // create packet manually as arrays are not supported and num_commands should not get reduced 3974 hci_reserve_packet_buffer(); 3975 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3976 3977 uint16_t size = 0; 3978 uint16_t num_handles = 0; 3979 packet[size++] = 0x35; 3980 packet[size++] = 0x0c; 3981 size++; // skip param len 3982 size++; // skip num handles 3983 3984 // add { handle, packets } entries 3985 btstack_linked_item_t * it; 3986 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3987 hci_connection_t * connection = (hci_connection_t *) it; 3988 if (connection->num_packets_completed){ 3989 little_endian_store_16(packet, size, connection->con_handle); 3990 size += 2; 3991 little_endian_store_16(packet, size, connection->num_packets_completed); 3992 size += 2; 3993 // 3994 num_handles++; 3995 connection->num_packets_completed = 0; 3996 } 3997 } 3998 3999 packet[2] = size - 3; 4000 packet[3] = num_handles; 4001 4002 hci_stack->host_completed_packets = 0; 4003 4004 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4005 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4006 4007 // release packet buffer for synchronous transport implementations 4008 if (hci_transport_synchronous()){ 4009 hci_release_packet_buffer(); 4010 hci_emit_transport_packet_sent(); 4011 } 4012 } 4013 #endif 4014 4015 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 4016 UNUSED(ds); 4017 hci_stack->substate = HCI_HALTING_CLOSE; 4018 // allow packet handlers to defer final shutdown 4019 hci_emit_state(); 4020 hci_run(); 4021 } 4022 4023 static bool hci_run_acl_fragments(void){ 4024 if (hci_stack->acl_fragmentation_total_size > 0u) { 4025 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 4026 hci_connection_t *connection = hci_connection_for_handle(con_handle); 4027 if (connection) { 4028 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 4029 hci_send_acl_packet_fragments(connection); 4030 return true; 4031 } 4032 } else { 4033 // connection gone -> discard further fragments 4034 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 4035 hci_stack->acl_fragmentation_total_size = 0; 4036 hci_stack->acl_fragmentation_pos = 0; 4037 } 4038 } 4039 return false; 4040 } 4041 4042 #ifdef ENABLE_CLASSIC 4043 static bool hci_run_general_gap_classic(void){ 4044 4045 // decline incoming connections 4046 if (hci_stack->decline_reason){ 4047 uint8_t reason = hci_stack->decline_reason; 4048 hci_stack->decline_reason = 0; 4049 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 4050 return true; 4051 } 4052 // write page scan activity 4053 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_interval != 0xffff) && hci_classic_supported()){ 4054 hci_send_cmd(&hci_write_page_scan_activity, hci_stack->new_page_scan_interval, hci_stack->new_page_scan_window); 4055 hci_stack->new_page_scan_interval = 0xffff; 4056 hci_stack->new_page_scan_window = 0xffff; 4057 return true; 4058 } 4059 // write page scan type 4060 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_page_scan_type != 0xff) && hci_classic_supported()){ 4061 hci_send_cmd(&hci_write_page_scan_type, hci_stack->new_page_scan_type); 4062 hci_stack->new_page_scan_type = 0xff; 4063 return true; 4064 } 4065 // send scan enable 4066 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 4067 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 4068 hci_stack->new_scan_enable_value = 0xff; 4069 return true; 4070 } 4071 // start/stop inquiry 4072 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 4073 uint8_t duration = hci_stack->inquiry_state; 4074 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_ACTIVE; 4075 hci_send_cmd(&hci_inquiry, hci_stack->inquiry_lap, duration, 0); 4076 return true; 4077 } 4078 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 4079 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 4080 hci_send_cmd(&hci_inquiry_cancel); 4081 return true; 4082 } 4083 // remote name request 4084 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 4085 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 4086 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 4087 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 4088 return true; 4089 } 4090 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4091 // Local OOB data 4092 if ((hci_stack->state == HCI_STATE_WORKING) && hci_stack->classic_read_local_oob_data){ 4093 hci_stack->classic_read_local_oob_data = false; 4094 if (hci_stack->local_supported_commands[1] & 0x10u){ 4095 hci_send_cmd(&hci_read_local_extended_oob_data); 4096 } else { 4097 hci_send_cmd(&hci_read_local_oob_data); 4098 } 4099 } 4100 #endif 4101 // pairing 4102 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 4103 uint8_t state = hci_stack->gap_pairing_state; 4104 uint8_t pin_code[16]; 4105 switch (state){ 4106 case GAP_PAIRING_STATE_SEND_PIN: 4107 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4108 memset(pin_code, 0, 16); 4109 memcpy(pin_code, hci_stack->gap_pairing_input.gap_pairing_pin, hci_stack->gap_pairing_pin_len); 4110 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, pin_code); 4111 break; 4112 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 4113 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4114 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 4115 break; 4116 case GAP_PAIRING_STATE_SEND_PASSKEY: 4117 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4118 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 4119 break; 4120 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 4121 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4122 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 4123 break; 4124 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 4125 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 4126 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 4127 break; 4128 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 4129 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_WAIT_FOR_COMMAND_COMPLETE; 4130 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 4131 break; 4132 default: 4133 break; 4134 } 4135 return true; 4136 } 4137 return false; 4138 } 4139 #endif 4140 4141 #ifdef ENABLE_BLE 4142 static bool hci_run_general_gap_le(void){ 4143 4144 // advertisements, active scanning, and creating connections requires random address to be set if using private address 4145 4146 if (hci_stack->state != HCI_STATE_WORKING) return false; 4147 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 4148 4149 4150 // Phase 1: collect what to stop 4151 4152 bool scanning_stop = false; 4153 bool connecting_stop = false; 4154 bool advertising_stop = false; 4155 4156 #ifndef ENABLE_LE_CENTRAL 4157 UNUSED(scanning_stop); 4158 UNUSED(connecting_stop); 4159 #endif 4160 #ifndef ENABLE_LE_PERIPHERAL 4161 UNUSED(advertising_stop); 4162 #endif 4163 4164 // check if whitelist needs modification 4165 bool whitelist_modification_pending = false; 4166 btstack_linked_list_iterator_t lit; 4167 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4168 while (btstack_linked_list_iterator_has_next(&lit)){ 4169 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4170 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 4171 whitelist_modification_pending = true; 4172 break; 4173 } 4174 } 4175 // check if resolving list needs modification 4176 bool resolving_list_modification_pending = false; 4177 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4178 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 4179 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 4180 resolving_list_modification_pending = true; 4181 } 4182 #endif 4183 4184 #ifdef ENABLE_LE_CENTRAL 4185 // scanning control 4186 if (hci_stack->le_scanning_active) { 4187 // stop if: 4188 // - parameter change required 4189 // - it's disabled 4190 // - whitelist change required but used for scanning 4191 // - resolving list modified 4192 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 4193 if ((hci_stack->le_scanning_param_update) || 4194 !hci_stack->le_scanning_enabled || 4195 scanning_uses_whitelist || 4196 resolving_list_modification_pending){ 4197 4198 scanning_stop = true; 4199 } 4200 } 4201 #endif 4202 4203 #ifdef ENABLE_LE_CENTRAL 4204 // connecting control 4205 bool connecting_with_whitelist; 4206 switch (hci_stack->le_connecting_state){ 4207 case LE_CONNECTING_DIRECT: 4208 case LE_CONNECTING_WHITELIST: 4209 // stop connecting if: 4210 // - connecting uses white and whitelist modification pending 4211 // - if it got disabled 4212 // - resolving list modified 4213 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 4214 if ((connecting_with_whitelist && whitelist_modification_pending) || 4215 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 4216 resolving_list_modification_pending) { 4217 4218 connecting_stop = true; 4219 } 4220 break; 4221 default: 4222 break; 4223 } 4224 #endif 4225 4226 #ifdef ENABLE_LE_PERIPHERAL 4227 // le advertisement control 4228 if (hci_stack->le_advertisements_active){ 4229 // stop if: 4230 // - parameter change required 4231 // - it's disabled 4232 // - whitelist change required but used for advertisement filter policy 4233 // - resolving list modified 4234 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy != 0; 4235 bool advertising_change = (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS) != 0; 4236 if (advertising_change || 4237 (hci_stack->le_advertisements_enabled_for_current_roles == 0) || 4238 (advertising_uses_whitelist & whitelist_modification_pending) || 4239 resolving_list_modification_pending) { 4240 4241 advertising_stop = true; 4242 } 4243 } 4244 #endif 4245 4246 4247 // Phase 2: stop everything that should be off during modifications 4248 4249 #ifdef ENABLE_LE_CENTRAL 4250 if (scanning_stop){ 4251 hci_stack->le_scanning_active = false; 4252 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 4253 return true; 4254 } 4255 #endif 4256 4257 #ifdef ENABLE_LE_CENTRAL 4258 if (connecting_stop){ 4259 hci_send_cmd(&hci_le_create_connection_cancel); 4260 return true; 4261 } 4262 #endif 4263 4264 #ifdef ENABLE_LE_PERIPHERAL 4265 if (advertising_stop){ 4266 hci_stack->le_advertisements_active = false; 4267 hci_send_cmd(&hci_le_set_advertise_enable, 0); 4268 return true; 4269 } 4270 #endif 4271 4272 // Phase 3: modify 4273 4274 #ifdef ENABLE_LE_CENTRAL 4275 if (hci_stack->le_scanning_param_update){ 4276 hci_stack->le_scanning_param_update = false; 4277 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 4278 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 4279 return true; 4280 } 4281 #endif 4282 4283 #ifdef ENABLE_LE_PERIPHERAL 4284 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 4285 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 4286 hci_stack->le_advertisements_own_addr_type = hci_stack->le_own_addr_type; 4287 hci_send_cmd(&hci_le_set_advertising_parameters, 4288 hci_stack->le_advertisements_interval_min, 4289 hci_stack->le_advertisements_interval_max, 4290 hci_stack->le_advertisements_type, 4291 hci_stack->le_advertisements_own_addr_type, 4292 hci_stack->le_advertisements_direct_address_type, 4293 hci_stack->le_advertisements_direct_address, 4294 hci_stack->le_advertisements_channel_map, 4295 hci_stack->le_advertisements_filter_policy); 4296 return true; 4297 } 4298 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 4299 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 4300 uint8_t adv_data_clean[31]; 4301 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 4302 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 4303 hci_stack->le_advertisements_data_len); 4304 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 4305 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 4306 return true; 4307 } 4308 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 4309 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 4310 uint8_t scan_data_clean[31]; 4311 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 4312 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 4313 hci_stack->le_scan_response_data_len); 4314 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 4315 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 4316 return true; 4317 } 4318 #endif 4319 4320 4321 #ifdef ENABLE_LE_CENTRAL 4322 // if connect with whitelist was active and is not cancelled yet, wait until next time 4323 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 4324 #endif 4325 4326 // LE Whitelist Management 4327 if (whitelist_modification_pending){ 4328 // add/remove entries 4329 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4330 while (btstack_linked_list_iterator_has_next(&lit)){ 4331 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4332 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 4333 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 4334 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 4335 return true; 4336 } 4337 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 4338 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 4339 entry->state |= LE_WHITELIST_ON_CONTROLLER; 4340 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 4341 return true; 4342 } 4343 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 4344 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4345 btstack_memory_whitelist_entry_free(entry); 4346 } 4347 } 4348 } 4349 4350 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 4351 // LE Resolving List Management 4352 if (resolving_list_supported) { 4353 uint16_t i; 4354 switch (hci_stack->le_resolving_list_state) { 4355 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 4356 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 4357 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 4358 return true; 4359 case LE_RESOLVING_LIST_READ_SIZE: 4360 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 4361 hci_send_cmd(&hci_le_read_resolving_list_size); 4362 return true; 4363 case LE_RESOLVING_LIST_SEND_CLEAR: 4364 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 4365 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 4366 sizeof(hci_stack->le_resolving_list_add_entries)); 4367 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 4368 sizeof(hci_stack->le_resolving_list_remove_entries)); 4369 hci_send_cmd(&hci_le_clear_resolving_list); 4370 return true; 4371 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 4372 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4373 uint8_t offset = i >> 3; 4374 uint8_t mask = 1 << (i & 7); 4375 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 4376 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 4377 bd_addr_t peer_identity_addreses; 4378 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4379 sm_key_t peer_irk; 4380 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4381 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4382 4383 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 4384 // trigger whitelist entry 'update' (work around for controller bug) 4385 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4386 while (btstack_linked_list_iterator_has_next(&lit)) { 4387 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 4388 if (entry->address_type != peer_identity_addr_type) continue; 4389 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 4390 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 4391 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 4392 } 4393 #endif 4394 4395 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 4396 peer_identity_addreses); 4397 return true; 4398 } 4399 4400 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 4401 4402 /* fall through */ 4403 4404 case LE_RESOLVING_LIST_ADD_ENTRIES: 4405 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4406 uint8_t offset = i >> 3; 4407 uint8_t mask = 1 << (i & 7); 4408 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4409 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4410 bd_addr_t peer_identity_addreses; 4411 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4412 sm_key_t peer_irk; 4413 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4414 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4415 const uint8_t *local_irk = gap_get_persistent_irk(); 4416 // command uses format specifier 'P' that stores 16-byte value without flip 4417 uint8_t local_irk_flipped[16]; 4418 uint8_t peer_irk_flipped[16]; 4419 reverse_128(local_irk, local_irk_flipped); 4420 reverse_128(peer_irk, peer_irk_flipped); 4421 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4422 peer_irk_flipped, local_irk_flipped); 4423 return true; 4424 } 4425 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4426 break; 4427 4428 default: 4429 break; 4430 } 4431 } 4432 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4433 #endif 4434 4435 // Phase 4: restore state 4436 4437 #ifdef ENABLE_LE_CENTRAL 4438 // re-start scanning 4439 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4440 hci_stack->le_scanning_active = true; 4441 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4442 return true; 4443 } 4444 #endif 4445 4446 #ifdef ENABLE_LE_CENTRAL 4447 // re-start connecting 4448 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4449 bd_addr_t null_addr; 4450 memset(null_addr, 0, 6); 4451 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4452 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4453 hci_send_cmd(&hci_le_create_connection, 4454 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4455 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4456 1, // use whitelist 4457 0, // peer address type 4458 null_addr, // peer bd addr 4459 hci_stack->le_connection_own_addr_type, // our addr type: 4460 hci_stack->le_connection_interval_min, // conn interval min 4461 hci_stack->le_connection_interval_max, // conn interval max 4462 hci_stack->le_connection_latency, // conn latency 4463 hci_stack->le_supervision_timeout, // conn latency 4464 hci_stack->le_minimum_ce_length, // min ce length 4465 hci_stack->le_maximum_ce_length // max ce length 4466 ); 4467 return true; 4468 } 4469 #endif 4470 4471 #ifdef ENABLE_LE_PERIPHERAL 4472 // re-start advertising 4473 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4474 // check if advertisements should be enabled given 4475 hci_stack->le_advertisements_active = true; 4476 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_advertisements_own_address); 4477 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4478 return true; 4479 } 4480 #endif 4481 4482 return false; 4483 } 4484 #endif 4485 4486 static bool hci_run_general_pending_commands(void){ 4487 btstack_linked_item_t * it; 4488 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4489 hci_connection_t * connection = (hci_connection_t *) it; 4490 4491 switch(connection->state){ 4492 case SEND_CREATE_CONNECTION: 4493 switch(connection->address_type){ 4494 #ifdef ENABLE_CLASSIC 4495 case BD_ADDR_TYPE_ACL: 4496 log_info("sending hci_create_connection"); 4497 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4498 break; 4499 #endif 4500 default: 4501 #ifdef ENABLE_BLE 4502 #ifdef ENABLE_LE_CENTRAL 4503 log_info("sending hci_le_create_connection"); 4504 hci_stack->le_connection_own_addr_type = hci_stack->le_own_addr_type; 4505 hci_get_own_address_for_addr_type(hci_stack->le_connection_own_addr_type, hci_stack->le_connection_own_address); 4506 hci_send_cmd(&hci_le_create_connection, 4507 hci_stack->le_connection_scan_interval, // conn scan interval 4508 hci_stack->le_connection_scan_window, // conn scan windows 4509 0, // don't use whitelist 4510 connection->address_type, // peer address type 4511 connection->address, // peer bd addr 4512 hci_stack->le_connection_own_addr_type, // our addr type: 4513 hci_stack->le_connection_interval_min, // conn interval min 4514 hci_stack->le_connection_interval_max, // conn interval max 4515 hci_stack->le_connection_latency, // conn latency 4516 hci_stack->le_supervision_timeout, // conn latency 4517 hci_stack->le_minimum_ce_length, // min ce length 4518 hci_stack->le_maximum_ce_length // max ce length 4519 ); 4520 connection->state = SENT_CREATE_CONNECTION; 4521 #endif 4522 #endif 4523 break; 4524 } 4525 return true; 4526 4527 #ifdef ENABLE_CLASSIC 4528 case RECEIVED_CONNECTION_REQUEST: 4529 connection->role = HCI_ROLE_SLAVE; 4530 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4531 log_info("sending hci_accept_connection_request"); 4532 connection->state = ACCEPTED_CONNECTION_REQUEST; 4533 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4534 } 4535 return true; 4536 #endif 4537 4538 #ifdef ENABLE_BLE 4539 #ifdef ENABLE_LE_CENTRAL 4540 case SEND_CANCEL_CONNECTION: 4541 connection->state = SENT_CANCEL_CONNECTION; 4542 hci_send_cmd(&hci_le_create_connection_cancel); 4543 return true; 4544 #endif 4545 #endif 4546 case SEND_DISCONNECT: 4547 connection->state = SENT_DISCONNECT; 4548 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4549 return true; 4550 4551 default: 4552 break; 4553 } 4554 4555 // no further commands if connection is about to get shut down 4556 if (connection->state == SENT_DISCONNECT) continue; 4557 4558 if (connection->authentication_flags & AUTH_FLAG_READ_RSSI){ 4559 connectionClearAuthenticationFlags(connection, AUTH_FLAG_READ_RSSI); 4560 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4561 return true; 4562 } 4563 4564 #ifdef ENABLE_CLASSIC 4565 4566 if (connection->authentication_flags & AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT){ 4567 connectionClearAuthenticationFlags(connection, AUTH_FLAG_WRITE_SUPERVISION_TIMEOUT); 4568 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4569 return true; 4570 } 4571 4572 // Handling link key request requires remote supported features 4573 if (((connection->authentication_flags & AUTH_FLAG_HANDLE_LINK_KEY_REQUEST) != 0)){ 4574 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4575 connectionClearAuthenticationFlags(connection, AUTH_FLAG_HANDLE_LINK_KEY_REQUEST); 4576 4577 // lookup link key using cached key first 4578 bool have_link_key = connection->link_key_type != INVALID_LINK_KEY; 4579 if (!have_link_key && (hci_stack->link_key_db != NULL)){ 4580 have_link_key = hci_stack->link_key_db->get_link_key(connection->address, connection->link_key, &connection->link_key_type); 4581 } 4582 4583 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(connection->link_key_type) >= connection->requested_security_level); 4584 if (have_link_key && security_level_sufficient){ 4585 hci_send_cmd(&hci_link_key_request_reply, connection->address, &connection->link_key); 4586 } else { 4587 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4588 } 4589 return true; 4590 } 4591 4592 if (connection->authentication_flags & AUTH_FLAG_DENY_PIN_CODE_REQUEST){ 4593 log_info("denying to pin request"); 4594 connectionClearAuthenticationFlags(connection, AUTH_FLAG_DENY_PIN_CODE_REQUEST); 4595 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4596 return true; 4597 } 4598 4599 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY){ 4600 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 4601 // set authentication requirements: 4602 // - MITM = ssp_authentication_requirement (USER) | requested_security_level (dynamic) 4603 // - BONDING MODE: dedicated if requested, bondable otherwise. Drop bondable if not set for remote 4604 uint8_t authreq = hci_stack->ssp_authentication_requirement & 1; 4605 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4606 authreq |= 1; 4607 } 4608 bool bonding = hci_stack->bondable; 4609 if (connection->authentication_flags & AUTH_FLAG_RECV_IO_CAPABILITIES_RESPONSE){ 4610 // if we have received IO Cap Response, we're in responder role 4611 bool remote_bonding = connection->io_cap_response_auth_req >= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4612 if (bonding && !remote_bonding){ 4613 log_info("Remote not bonding, dropping local flag"); 4614 bonding = false; 4615 } 4616 } 4617 if (bonding){ 4618 if (connection->bonding_flags & BONDING_DEDICATED){ 4619 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4620 } else { 4621 authreq |= SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 4622 } 4623 } 4624 uint8_t have_oob_data = 0; 4625 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4626 if (connection->classic_oob_c_192 != NULL){ 4627 have_oob_data |= 1; 4628 } 4629 if (connection->classic_oob_c_256 != NULL){ 4630 have_oob_data |= 2; 4631 } 4632 #endif 4633 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4634 return true; 4635 } 4636 4637 if (connection->authentication_flags & AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY) { 4638 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 4639 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4640 return true; 4641 } 4642 4643 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4644 if (connection->authentication_flags & AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY){ 4645 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_REMOTE_OOB_DATA_REPLY); 4646 const uint8_t zero[16] = { 0 }; 4647 const uint8_t * r_192 = zero; 4648 const uint8_t * c_192 = zero; 4649 const uint8_t * r_256 = zero; 4650 const uint8_t * c_256 = zero; 4651 // verify P-256 OOB 4652 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4653 c_256 = connection->classic_oob_c_256; 4654 if (connection->classic_oob_r_256 != NULL) { 4655 r_256 = connection->classic_oob_r_256; 4656 } 4657 } 4658 // verify P-192 OOB 4659 if ((connection->classic_oob_c_192 != NULL)) { 4660 c_192 = connection->classic_oob_c_192; 4661 if (connection->classic_oob_r_192 != NULL) { 4662 r_192 = connection->classic_oob_r_192; 4663 } 4664 } 4665 4666 // assess security 4667 bool need_level_4 = hci_stack->gap_secure_connections_only_mode || (connection->requested_security_level == LEVEL_4); 4668 bool can_reach_level_4 = hci_remote_sc_enabled(connection) && (c_256 != NULL); 4669 if (need_level_4 && !can_reach_level_4){ 4670 log_info("Level 4 required, but not possible -> abort"); 4671 hci_pairing_complete(connection, ERROR_CODE_INSUFFICIENT_SECURITY); 4672 // send oob negative reply 4673 c_256 = NULL; 4674 c_192 = NULL; 4675 } 4676 4677 // Reply 4678 if (c_256 != zero) { 4679 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4680 } else if (c_192 != zero){ 4681 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4682 } else { 4683 hci_stack->classic_oob_con_handle = connection->con_handle; 4684 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4685 } 4686 return true; 4687 } 4688 #endif 4689 4690 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_REPLY){ 4691 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_REPLY); 4692 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4693 return true; 4694 } 4695 4696 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY){ 4697 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_CONFIRM_NEGATIVE_REPLY); 4698 hci_send_cmd(&hci_user_confirmation_request_negative_reply, &connection->address); 4699 return true; 4700 } 4701 4702 if (connection->authentication_flags & AUTH_FLAG_SEND_USER_PASSKEY_REPLY){ 4703 connectionClearAuthenticationFlags(connection, AUTH_FLAG_SEND_USER_PASSKEY_REPLY); 4704 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4705 return true; 4706 } 4707 4708 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4709 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4710 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4711 return true; 4712 } 4713 4714 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4715 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4716 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4717 return true; 4718 } 4719 4720 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4721 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4722 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4723 return true; 4724 } 4725 4726 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4727 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4728 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4729 connection->state = SENT_DISCONNECT; 4730 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4731 return true; 4732 } 4733 4734 if ((connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST) && ((connection->bonding_flags & BONDING_RECEIVED_REMOTE_FEATURES) != 0)){ 4735 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4736 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4737 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4738 return true; 4739 } 4740 4741 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4742 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4743 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4744 return true; 4745 } 4746 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4747 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4748 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4749 return true; 4750 } 4751 #endif 4752 4753 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4754 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4755 #ifdef ENABLE_CLASSIC 4756 hci_pairing_complete(connection, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_SECURITY_REASONS); 4757 #endif 4758 if (connection->state != SENT_DISCONNECT){ 4759 connection->state = SENT_DISCONNECT; 4760 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4761 return true; 4762 } 4763 } 4764 4765 #ifdef ENABLE_CLASSIC 4766 uint16_t sniff_min_interval; 4767 switch (connection->sniff_min_interval){ 4768 case 0: 4769 break; 4770 case 0xffff: 4771 connection->sniff_min_interval = 0; 4772 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4773 return true; 4774 default: 4775 sniff_min_interval = connection->sniff_min_interval; 4776 connection->sniff_min_interval = 0; 4777 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4778 return true; 4779 } 4780 4781 if (connection->sniff_subrating_max_latency != 0xffff){ 4782 uint16_t max_latency = connection->sniff_subrating_max_latency; 4783 connection->sniff_subrating_max_latency = 0; 4784 hci_send_cmd(&hci_sniff_subrating, connection->con_handle, max_latency, connection->sniff_subrating_min_remote_timeout, connection->sniff_subrating_min_local_timeout); 4785 return true; 4786 } 4787 4788 if (connection->qos_service_type != HCI_SERVICE_TYPE_INVALID){ 4789 uint8_t service_type = (uint8_t) connection->qos_service_type; 4790 connection->qos_service_type = HCI_SERVICE_TYPE_INVALID; 4791 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); 4792 return true; 4793 } 4794 4795 if (connection->request_role != HCI_ROLE_INVALID){ 4796 hci_role_t role = connection->request_role; 4797 connection->request_role = HCI_ROLE_INVALID; 4798 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4799 return true; 4800 } 4801 #endif 4802 4803 #ifdef ENABLE_BLE 4804 switch (connection->le_con_parameter_update_state){ 4805 // response to L2CAP CON PARAMETER UPDATE REQUEST 4806 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4807 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4808 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4809 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4810 0x0000, 0xffff); 4811 return true; 4812 case CON_PARAMETER_UPDATE_REPLY: 4813 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4814 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4815 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4816 0x0000, 0xffff); 4817 return true; 4818 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4819 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4820 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4821 return true; 4822 default: 4823 break; 4824 } 4825 if (connection->le_phy_update_all_phys != 0xffu){ 4826 uint8_t all_phys = connection->le_phy_update_all_phys; 4827 connection->le_phy_update_all_phys = 0xff; 4828 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); 4829 return true; 4830 } 4831 #endif 4832 } 4833 return false; 4834 } 4835 4836 static void hci_run(void){ 4837 4838 bool done; 4839 4840 // send continuation fragments first, as they block the prepared packet buffer 4841 done = hci_run_acl_fragments(); 4842 if (done) return; 4843 4844 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4845 // send host num completed packets next as they don't require num_cmd_packets > 0 4846 if (!hci_can_send_comand_packet_transport()) return; 4847 if (hci_stack->host_completed_packets){ 4848 hci_host_num_completed_packets(); 4849 return; 4850 } 4851 #endif 4852 4853 if (!hci_can_send_command_packet_now()) return; 4854 4855 // global/non-connection oriented commands 4856 4857 4858 #ifdef ENABLE_CLASSIC 4859 // general gap classic 4860 done = hci_run_general_gap_classic(); 4861 if (done) return; 4862 #endif 4863 4864 #ifdef ENABLE_BLE 4865 // general gap le 4866 done = hci_run_general_gap_le(); 4867 if (done) return; 4868 #endif 4869 4870 // send pending HCI commands 4871 done = hci_run_general_pending_commands(); 4872 if (done) return; 4873 4874 // stack state sub statemachines 4875 hci_connection_t * connection; 4876 switch (hci_stack->state){ 4877 case HCI_STATE_INITIALIZING: 4878 hci_initializing_run(); 4879 break; 4880 4881 case HCI_STATE_HALTING: 4882 4883 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4884 switch (hci_stack->substate){ 4885 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4886 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4887 4888 #ifdef ENABLE_BLE 4889 #ifdef ENABLE_LE_CENTRAL 4890 // free whitelist entries 4891 { 4892 btstack_linked_list_iterator_t lit; 4893 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4894 while (btstack_linked_list_iterator_has_next(&lit)){ 4895 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4896 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4897 btstack_memory_whitelist_entry_free(entry); 4898 } 4899 } 4900 #endif 4901 #endif 4902 // close all open connections 4903 connection = (hci_connection_t *) hci_stack->connections; 4904 if (connection){ 4905 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4906 if (!hci_can_send_command_packet_now()) return; 4907 4908 // check state 4909 if (connection->state == SENT_DISCONNECT) return; 4910 connection->state = SENT_DISCONNECT; 4911 4912 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4913 4914 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4915 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4916 4917 // ... which would be ignored anyway as we shutdown (free) the connection now 4918 hci_shutdown_connection(connection); 4919 4920 // finally, send the disconnect command 4921 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4922 return; 4923 } 4924 4925 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4926 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4927 log_info("HCI_STATE_HALTING: wait 50 ms"); 4928 hci_stack->substate = HCI_HALTING_W4_TIMER; 4929 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4930 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4931 btstack_run_loop_add_timer(&hci_stack->timeout); 4932 break; 4933 } 4934 4935 /* fall through */ 4936 4937 case HCI_HALTING_CLOSE: 4938 log_info("HCI_STATE_HALTING, calling off"); 4939 4940 // switch mode 4941 hci_power_control_off(); 4942 4943 log_info("HCI_STATE_HALTING, emitting state"); 4944 hci_emit_state(); 4945 log_info("HCI_STATE_HALTING, done"); 4946 break; 4947 4948 case HCI_HALTING_W4_TIMER: 4949 // keep waiting 4950 4951 break; 4952 default: 4953 break; 4954 } 4955 4956 break; 4957 4958 case HCI_STATE_FALLING_ASLEEP: 4959 switch(hci_stack->substate) { 4960 case HCI_FALLING_ASLEEP_DISCONNECT: 4961 log_info("HCI_STATE_FALLING_ASLEEP"); 4962 // close all open connections 4963 connection = (hci_connection_t *) hci_stack->connections; 4964 4965 #ifdef HAVE_PLATFORM_IPHONE_OS 4966 // don't close connections, if H4 supports power management 4967 if (btstack_control_iphone_power_management_enabled()){ 4968 connection = NULL; 4969 } 4970 #endif 4971 if (connection){ 4972 4973 // send disconnect 4974 if (!hci_can_send_command_packet_now()) return; 4975 4976 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4977 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4978 4979 // send disconnected event right away - causes higher layer connections to get closed, too. 4980 hci_shutdown_connection(connection); 4981 return; 4982 } 4983 4984 if (hci_classic_supported()){ 4985 // disable page and inquiry scan 4986 if (!hci_can_send_command_packet_now()) return; 4987 4988 log_info("HCI_STATE_HALTING, disabling inq scans"); 4989 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4990 4991 // continue in next sub state 4992 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4993 break; 4994 } 4995 4996 /* fall through */ 4997 4998 case HCI_FALLING_ASLEEP_COMPLETE: 4999 log_info("HCI_STATE_HALTING, calling sleep"); 5000 #ifdef HAVE_PLATFORM_IPHONE_OS 5001 // don't actually go to sleep, if H4 supports power management 5002 if (btstack_control_iphone_power_management_enabled()){ 5003 // SLEEP MODE reached 5004 hci_stack->state = HCI_STATE_SLEEPING; 5005 hci_emit_state(); 5006 break; 5007 } 5008 #endif 5009 // switch mode 5010 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 5011 hci_emit_state(); 5012 break; 5013 5014 default: 5015 break; 5016 } 5017 break; 5018 5019 default: 5020 break; 5021 } 5022 } 5023 5024 int hci_send_cmd_packet(uint8_t *packet, int size){ 5025 // house-keeping 5026 5027 #ifdef ENABLE_CLASSIC 5028 bd_addr_t addr; 5029 hci_connection_t * conn; 5030 #endif 5031 #ifdef ENABLE_LE_CENTRAL 5032 uint8_t initiator_filter_policy; 5033 #endif 5034 5035 uint16_t opcode = little_endian_read_16(packet, 0); 5036 switch (opcode) { 5037 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 5038 hci_stack->loopback_mode = packet[3]; 5039 break; 5040 5041 #ifdef ENABLE_CLASSIC 5042 case HCI_OPCODE_HCI_CREATE_CONNECTION: 5043 reverse_bd_addr(&packet[3], addr); 5044 log_info("Create_connection to %s", bd_addr_to_str(addr)); 5045 5046 // CVE-2020-26555: reject outgoing connection to device with same BD ADDR 5047 if (memcmp(hci_stack->local_bd_addr, addr, 6) == 0) { 5048 hci_emit_connection_complete(addr, 0, ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR); 5049 return -1; 5050 } 5051 5052 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5053 if (!conn) { 5054 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5055 if (!conn) { 5056 // notify client that alloc failed 5057 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5058 return -1; // packet not sent to controller 5059 } 5060 conn->state = SEND_CREATE_CONNECTION; 5061 conn->role = HCI_ROLE_MASTER; 5062 } 5063 log_info("conn state %u", conn->state); 5064 switch (conn->state) { 5065 // if connection active exists 5066 case OPEN: 5067 // and OPEN, emit connection complete command 5068 hci_emit_connection_complete(addr, conn->con_handle, ERROR_CODE_SUCCESS); 5069 return -1; // packet not sent to controller 5070 case RECEIVED_DISCONNECTION_COMPLETE: 5071 // create connection triggered in disconnect complete event, let's do it now 5072 break; 5073 case SEND_CREATE_CONNECTION: 5074 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 5075 break; 5076 default: 5077 // otherwise, just ignore as it is already in the open process 5078 return -1; // packet not sent to controller 5079 } 5080 conn->state = SENT_CREATE_CONNECTION; 5081 5082 // track outgoing connection 5083 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 5084 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 5085 break; 5086 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 5087 if (hci_stack->link_key_db) { 5088 reverse_bd_addr(&packet[3], addr); 5089 hci_stack->link_key_db->delete_link_key(addr); 5090 } 5091 break; 5092 5093 #if defined (ENABLE_SCO_OVER_HCI) || defined (HAVE_SCO_TRANSPORT) 5094 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 5095 // setup_synchronous_connection? Voice setting at offset 22 5096 // TODO: compare to current setting if sco connection already active 5097 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 5098 break; 5099 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 5100 // accept_synchronus_connection? Voice setting at offset 18 5101 // TODO: compare to current setting if sco connection already active 5102 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 5103 break; 5104 #endif 5105 #endif 5106 5107 #ifdef ENABLE_BLE 5108 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 5109 hci_stack->le_random_address_set = 1; 5110 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 5111 break; 5112 #ifdef ENABLE_LE_PERIPHERAL 5113 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 5114 hci_stack->le_advertisements_active = packet[3] != 0; 5115 break; 5116 #endif 5117 #ifdef ENABLE_LE_CENTRAL 5118 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 5119 // white list used? 5120 initiator_filter_policy = packet[7]; 5121 switch (initiator_filter_policy) { 5122 case 0: 5123 // whitelist not used 5124 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 5125 break; 5126 case 1: 5127 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 5128 break; 5129 default: 5130 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 5131 break; 5132 } 5133 // track outgoing connection 5134 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 5135 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 5136 break; 5137 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 5138 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 5139 break; 5140 #endif 5141 #endif 5142 default: 5143 break; 5144 } 5145 5146 hci_stack->num_cmd_packets--; 5147 5148 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 5149 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 5150 } 5151 5152 // disconnect because of security block 5153 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 5154 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5155 if (!connection) return; 5156 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 5157 } 5158 5159 5160 // Configure Secure Simple Pairing 5161 5162 #ifdef ENABLE_CLASSIC 5163 5164 // enable will enable SSP during init 5165 void gap_ssp_set_enable(int enable){ 5166 hci_stack->ssp_enable = enable; 5167 } 5168 5169 static int hci_local_ssp_activated(void){ 5170 return gap_ssp_supported() && hci_stack->ssp_enable; 5171 } 5172 5173 // if set, BTstack will respond to io capability request using authentication requirement 5174 void gap_ssp_set_io_capability(int io_capability){ 5175 hci_stack->ssp_io_capability = io_capability; 5176 } 5177 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 5178 hci_stack->ssp_authentication_requirement = authentication_requirement; 5179 } 5180 5181 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 5182 void gap_ssp_set_auto_accept(int auto_accept){ 5183 hci_stack->ssp_auto_accept = auto_accept; 5184 } 5185 5186 void gap_secure_connections_enable(bool enable){ 5187 hci_stack->secure_connections_enable = enable; 5188 } 5189 5190 #endif 5191 5192 // va_list part of hci_send_cmd 5193 int hci_send_cmd_va_arg(const hci_cmd_t * cmd, va_list argptr){ 5194 if (!hci_can_send_command_packet_now()){ 5195 log_error("hci_send_cmd called but cannot send packet now"); 5196 return 0; 5197 } 5198 5199 // for HCI INITIALIZATION 5200 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 5201 hci_stack->last_cmd_opcode = cmd->opcode; 5202 5203 hci_reserve_packet_buffer(); 5204 uint8_t * packet = hci_stack->hci_packet_buffer; 5205 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 5206 int err = hci_send_cmd_packet(packet, size); 5207 5208 // release packet buffer on error or for synchronous transport implementations 5209 if ((err < 0) || hci_transport_synchronous()){ 5210 hci_release_packet_buffer(); 5211 hci_emit_transport_packet_sent(); 5212 } 5213 5214 return err; 5215 } 5216 5217 /** 5218 * pre: numcmds >= 0 - it's allowed to send a command to the controller 5219 */ 5220 int hci_send_cmd(const hci_cmd_t * cmd, ...){ 5221 va_list argptr; 5222 va_start(argptr, cmd); 5223 int res = hci_send_cmd_va_arg(cmd, argptr); 5224 va_end(argptr); 5225 return res; 5226 } 5227 5228 // Create various non-HCI events. 5229 // TODO: generalize, use table similar to hci_create_command 5230 5231 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 5232 // dump packet 5233 if (dump) { 5234 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 5235 } 5236 5237 // dispatch to all event handlers 5238 btstack_linked_list_iterator_t it; 5239 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 5240 while (btstack_linked_list_iterator_has_next(&it)){ 5241 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 5242 entry->callback(HCI_EVENT_PACKET, 0, event, size); 5243 } 5244 } 5245 5246 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 5247 if (!hci_stack->acl_packet_handler) return; 5248 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 5249 } 5250 5251 #ifdef ENABLE_CLASSIC 5252 static void hci_notify_if_sco_can_send_now(void){ 5253 // notify SCO sender if waiting 5254 if (!hci_stack->sco_waiting_for_can_send_now) return; 5255 if (hci_can_send_sco_packet_now()){ 5256 hci_stack->sco_waiting_for_can_send_now = 0; 5257 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 5258 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 5259 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 5260 } 5261 } 5262 5263 // parsing end emitting has been merged to reduce code size 5264 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 5265 uint8_t event[28+GAP_INQUIRY_MAX_NAME_LEN]; 5266 5267 uint8_t * eir_data; 5268 ad_context_t context; 5269 const uint8_t * name; 5270 uint8_t name_len; 5271 5272 if (size < 3) return; 5273 5274 int event_type = hci_event_packet_get_type(packet); 5275 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 5276 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 5277 5278 switch (event_type){ 5279 case HCI_EVENT_INQUIRY_RESULT: 5280 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5281 if (size != (3 + (num_responses * 14))) return; 5282 break; 5283 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5284 if (size != 257) return; 5285 if (num_responses != 1) return; 5286 break; 5287 default: 5288 return; 5289 } 5290 5291 // event[1] is set at the end 5292 int i; 5293 for (i=0; i<num_responses;i++){ 5294 memset(event, 0, sizeof(event)); 5295 event[0] = GAP_EVENT_INQUIRY_RESULT; 5296 uint8_t event_size = 27; // if name is not set by EIR 5297 5298 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 5299 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 5300 (void)memcpy(&event[9], 5301 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 5302 3); // class of device 5303 (void)memcpy(&event[12], 5304 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 5305 2); // clock offset 5306 5307 switch (event_type){ 5308 case HCI_EVENT_INQUIRY_RESULT: 5309 // 14,15,16,17 = 0, size 18 5310 break; 5311 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 5312 event[14] = 1; 5313 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5314 // 16,17 = 0, size 18 5315 break; 5316 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 5317 event[14] = 1; 5318 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 5319 // EIR packets only contain a single inquiry response 5320 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 5321 name = NULL; 5322 // Iterate over EIR data 5323 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 5324 uint8_t data_type = ad_iterator_get_data_type(&context); 5325 uint8_t data_size = ad_iterator_get_data_len(&context); 5326 const uint8_t * data = ad_iterator_get_data(&context); 5327 // Prefer Complete Local Name over Shortened Local Name 5328 switch (data_type){ 5329 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 5330 if (name) continue; 5331 /* fall through */ 5332 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 5333 name = data; 5334 name_len = data_size; 5335 break; 5336 case BLUETOOTH_DATA_TYPE_DEVICE_ID: 5337 if (data_size != 8) break; 5338 event[16] = 1; 5339 memcpy(&event[17], data, 8); 5340 break; 5341 default: 5342 break; 5343 } 5344 } 5345 if (name){ 5346 event[25] = 1; 5347 // truncate name if needed 5348 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 5349 event[26] = len; 5350 (void)memcpy(&event[27], name, len); 5351 event_size += len; 5352 } 5353 break; 5354 default: 5355 return; 5356 } 5357 event[1] = event_size - 2; 5358 hci_emit_event(event, event_size, 1); 5359 } 5360 } 5361 #endif 5362 5363 void hci_emit_state(void){ 5364 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 5365 uint8_t event[3]; 5366 event[0] = BTSTACK_EVENT_STATE; 5367 event[1] = sizeof(event) - 2u; 5368 event[2] = hci_stack->state; 5369 hci_emit_event(event, sizeof(event), 1); 5370 } 5371 5372 #ifdef ENABLE_CLASSIC 5373 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 5374 uint8_t event[13]; 5375 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 5376 event[1] = sizeof(event) - 2; 5377 event[2] = status; 5378 little_endian_store_16(event, 3, con_handle); 5379 reverse_bd_addr(address, &event[5]); 5380 event[11] = 1; // ACL connection 5381 event[12] = 0; // encryption disabled 5382 hci_emit_event(event, sizeof(event), 1); 5383 } 5384 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 5385 if (disable_l2cap_timeouts) return; 5386 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 5387 uint8_t event[4]; 5388 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 5389 event[1] = sizeof(event) - 2; 5390 little_endian_store_16(event, 2, conn->con_handle); 5391 hci_emit_event(event, sizeof(event), 1); 5392 } 5393 #endif 5394 5395 #ifdef ENABLE_BLE 5396 #ifdef ENABLE_LE_CENTRAL 5397 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){ 5398 uint8_t event[21]; 5399 event[0] = HCI_EVENT_LE_META; 5400 event[1] = sizeof(event) - 2u; 5401 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 5402 event[3] = status; 5403 little_endian_store_16(event, 4, con_handle); 5404 event[6] = 0; // TODO: role 5405 event[7] = address_type; 5406 reverse_bd_addr(address, &event[8]); 5407 little_endian_store_16(event, 14, 0); // interval 5408 little_endian_store_16(event, 16, 0); // latency 5409 little_endian_store_16(event, 18, 0); // supervision timeout 5410 event[20] = 0; // master clock accuracy 5411 hci_emit_event(event, sizeof(event), 1); 5412 } 5413 #endif 5414 #endif 5415 5416 static void hci_emit_transport_packet_sent(void){ 5417 // notify upper stack that it might be possible to send again 5418 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 5419 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 5420 } 5421 5422 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 5423 uint8_t event[6]; 5424 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 5425 event[1] = sizeof(event) - 2u; 5426 event[2] = 0; // status = OK 5427 little_endian_store_16(event, 3, con_handle); 5428 event[5] = reason; 5429 hci_emit_event(event, sizeof(event), 1); 5430 } 5431 5432 static void hci_emit_nr_connections_changed(void){ 5433 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 5434 uint8_t event[3]; 5435 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 5436 event[1] = sizeof(event) - 2u; 5437 event[2] = nr_hci_connections(); 5438 hci_emit_event(event, sizeof(event), 1); 5439 } 5440 5441 static void hci_emit_hci_open_failed(void){ 5442 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5443 uint8_t event[2]; 5444 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5445 event[1] = sizeof(event) - 2u; 5446 hci_emit_event(event, sizeof(event), 1); 5447 } 5448 5449 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5450 log_info("hci_emit_dedicated_bonding_result %u ", status); 5451 uint8_t event[9]; 5452 int pos = 0; 5453 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5454 event[pos++] = sizeof(event) - 2u; 5455 event[pos++] = status; 5456 reverse_bd_addr(address, &event[pos]); 5457 hci_emit_event(event, sizeof(event), 1); 5458 } 5459 5460 5461 #ifdef ENABLE_CLASSIC 5462 5463 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5464 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5465 uint8_t event[5]; 5466 int pos = 0; 5467 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5468 event[pos++] = sizeof(event) - 2; 5469 little_endian_store_16(event, 2, con_handle); 5470 pos += 2; 5471 event[pos++] = level; 5472 hci_emit_event(event, sizeof(event), 1); 5473 } 5474 5475 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5476 if (!connection) return LEVEL_0; 5477 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5478 // BIAS: we only consider Authenticated if the connection is already encrypted, which requires that both sides have link key 5479 if ((connection->authentication_flags & AUTH_FLAG_CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5480 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5481 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5482 // LEVEL 4 always requires 128 bit encrytion key size 5483 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5484 security_level = LEVEL_3; 5485 } 5486 return security_level; 5487 } 5488 5489 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5490 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5491 uint8_t event[3]; 5492 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5493 event[1] = sizeof(event) - 2; 5494 event[2] = enabled; 5495 hci_emit_event(event, sizeof(event), 1); 5496 } 5497 5498 // query if remote side supports eSCO 5499 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5500 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5501 if (!connection) return 0; 5502 return (connection->remote_supported_features[0] & 1) != 0; 5503 } 5504 5505 static bool hci_ssp_supported(hci_connection_t * connection){ 5506 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5507 return (connection->bonding_flags & mask) == mask; 5508 } 5509 5510 // query if remote side supports SSP 5511 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5512 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5513 if (!connection) return 0; 5514 return hci_ssp_supported(connection) ? 1 : 0; 5515 } 5516 5517 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5518 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5519 } 5520 5521 // GAP API 5522 /** 5523 * @bbrief enable/disable bonding. default is enabled 5524 * @praram enabled 5525 */ 5526 void gap_set_bondable_mode(int enable){ 5527 hci_stack->bondable = enable ? 1 : 0; 5528 } 5529 /** 5530 * @brief Get bondable mode. 5531 * @return 1 if bondable 5532 */ 5533 int gap_get_bondable_mode(void){ 5534 return hci_stack->bondable; 5535 } 5536 5537 /** 5538 * @brief map link keys to security levels 5539 */ 5540 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5541 switch (link_key_type){ 5542 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5543 return LEVEL_4; 5544 case COMBINATION_KEY: 5545 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5546 return LEVEL_3; 5547 default: 5548 return LEVEL_2; 5549 } 5550 } 5551 5552 /** 5553 * @brief map link keys to secure connection yes/no 5554 */ 5555 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5556 switch (link_key_type){ 5557 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5558 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5559 return 1; 5560 default: 5561 return 0; 5562 } 5563 } 5564 5565 /** 5566 * @brief map link keys to authenticated 5567 */ 5568 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5569 switch (link_key_type){ 5570 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5571 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5572 return 1; 5573 default: 5574 return 0; 5575 } 5576 } 5577 5578 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5579 log_info("gap_mitm_protection_required_for_security_level %u", level); 5580 return level > LEVEL_2; 5581 } 5582 5583 /** 5584 * @brief get current security level 5585 */ 5586 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5587 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5588 if (!connection) return LEVEL_0; 5589 return gap_security_level_for_connection(connection); 5590 } 5591 5592 /** 5593 * @brief request connection to device to 5594 * @result GAP_AUTHENTICATION_RESULT 5595 */ 5596 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5597 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5598 if (!connection){ 5599 hci_emit_security_level(con_handle, LEVEL_0); 5600 return; 5601 } 5602 5603 btstack_assert(hci_is_le_connection(connection) == false); 5604 5605 // 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) 5606 // available on the BR/EDR physical transport require Security Mode 4, Level 4 " 5607 if (hci_stack->gap_secure_connections_only_mode && (requested_level != LEVEL_0)){ 5608 requested_level = LEVEL_4; 5609 } 5610 5611 gap_security_level_t current_level = gap_security_level(con_handle); 5612 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5613 requested_level, connection->requested_security_level, current_level); 5614 5615 // authentication active if authentication request was sent or planned level > 0 5616 bool authentication_active = ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) || (connection->requested_security_level > LEVEL_0); 5617 if (authentication_active){ 5618 // authentication already active 5619 if (connection->requested_security_level < requested_level){ 5620 // increase requested level as new level is higher 5621 // TODO: handle re-authentication when done 5622 connection->requested_security_level = requested_level; 5623 } 5624 } else { 5625 // no request active, notify if security sufficient 5626 if (requested_level <= current_level){ 5627 hci_emit_security_level(con_handle, current_level); 5628 return; 5629 } 5630 5631 // store request 5632 connection->requested_security_level = requested_level; 5633 5634 // start to authenticate connection 5635 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5636 hci_run(); 5637 } 5638 } 5639 5640 /** 5641 * @brief start dedicated bonding with device. disconnect after bonding 5642 * @param device 5643 * @param request MITM protection 5644 * @result GAP_DEDICATED_BONDING_COMPLETE 5645 */ 5646 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5647 5648 // create connection state machine 5649 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5650 5651 if (!connection){ 5652 return BTSTACK_MEMORY_ALLOC_FAILED; 5653 } 5654 5655 // delete linkn key 5656 gap_drop_link_key_for_bd_addr(device); 5657 5658 // configure LEVEL_2/3, dedicated bonding 5659 connection->state = SEND_CREATE_CONNECTION; 5660 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5661 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5662 connection->bonding_flags = BONDING_DEDICATED; 5663 5664 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5665 5666 // handle: connnection failure (connection complete != ok) 5667 // handle: authentication failure 5668 // handle: disconnect on done 5669 5670 hci_run(); 5671 5672 return 0; 5673 } 5674 #endif 5675 5676 void gap_set_local_name(const char * local_name){ 5677 hci_stack->local_name = local_name; 5678 } 5679 5680 5681 #ifdef ENABLE_BLE 5682 5683 #ifdef ENABLE_LE_CENTRAL 5684 void gap_start_scan(void){ 5685 hci_stack->le_scanning_enabled = true; 5686 hci_run(); 5687 } 5688 5689 void gap_stop_scan(void){ 5690 hci_stack->le_scanning_enabled = false; 5691 hci_run(); 5692 } 5693 5694 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5695 hci_stack->le_scan_type = scan_type; 5696 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5697 hci_stack->le_scan_interval = scan_interval; 5698 hci_stack->le_scan_window = scan_window; 5699 hci_stack->le_scanning_param_update = true; 5700 hci_run(); 5701 } 5702 5703 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5704 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5705 } 5706 5707 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5708 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5709 if (!conn){ 5710 // disallow if le connection is already outgoing 5711 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5712 log_error("le connection already active"); 5713 return ERROR_CODE_COMMAND_DISALLOWED; 5714 } 5715 5716 log_info("gap_connect: no connection exists yet, creating context"); 5717 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5718 if (!conn){ 5719 // notify client that alloc failed 5720 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5721 log_info("gap_connect: failed to alloc hci_connection_t"); 5722 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5723 } 5724 5725 // set le connecting state 5726 if (hci_is_le_connection_type(addr_type)){ 5727 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5728 } 5729 5730 conn->state = SEND_CREATE_CONNECTION; 5731 log_info("gap_connect: send create connection next"); 5732 hci_run(); 5733 return ERROR_CODE_SUCCESS; 5734 } 5735 5736 if (!hci_is_le_connection(conn) || 5737 (conn->state == SEND_CREATE_CONNECTION) || 5738 (conn->state == SENT_CREATE_CONNECTION)) { 5739 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5740 log_error("gap_connect: classic connection or connect is already being created"); 5741 return GATT_CLIENT_IN_WRONG_STATE; 5742 } 5743 5744 // check if connection was just disconnected 5745 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5746 log_info("gap_connect: send create connection (again)"); 5747 conn->state = SEND_CREATE_CONNECTION; 5748 hci_run(); 5749 return ERROR_CODE_SUCCESS; 5750 } 5751 5752 log_info("gap_connect: context exists with state %u", conn->state); 5753 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5754 hci_run(); 5755 return ERROR_CODE_SUCCESS; 5756 } 5757 5758 // @assumption: only a single outgoing LE Connection exists 5759 static hci_connection_t * gap_get_outgoing_connection(void){ 5760 btstack_linked_item_t *it; 5761 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5762 hci_connection_t * conn = (hci_connection_t *) it; 5763 if (!hci_is_le_connection(conn)) continue; 5764 switch (conn->state){ 5765 case SEND_CREATE_CONNECTION: 5766 case SENT_CREATE_CONNECTION: 5767 case SENT_CANCEL_CONNECTION: 5768 return conn; 5769 default: 5770 break; 5771 }; 5772 } 5773 return NULL; 5774 } 5775 5776 uint8_t gap_connect_cancel(void){ 5777 hci_connection_t * conn = gap_get_outgoing_connection(); 5778 if (!conn) return 0; 5779 switch (conn->state){ 5780 case SEND_CREATE_CONNECTION: 5781 // skip sending create connection and emit event instead 5782 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5783 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5784 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5785 btstack_memory_hci_connection_free( conn ); 5786 break; 5787 case SENT_CREATE_CONNECTION: 5788 // request to send cancel connection 5789 conn->state = SEND_CANCEL_CONNECTION; 5790 hci_run(); 5791 break; 5792 default: 5793 break; 5794 } 5795 return 0; 5796 } 5797 #endif 5798 5799 #ifdef ENABLE_LE_CENTRAL 5800 /** 5801 * @brief Set connection parameters for outgoing connections 5802 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5803 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5804 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5805 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5806 * @param conn_latency, default: 4 5807 * @param supervision_timeout (unit: 10ms), default: 720 ms 5808 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5809 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5810 */ 5811 5812 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5813 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5814 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5815 hci_stack->le_connection_scan_interval = conn_scan_interval; 5816 hci_stack->le_connection_scan_window = conn_scan_window; 5817 hci_stack->le_connection_interval_min = conn_interval_min; 5818 hci_stack->le_connection_interval_max = conn_interval_max; 5819 hci_stack->le_connection_latency = conn_latency; 5820 hci_stack->le_supervision_timeout = supervision_timeout; 5821 hci_stack->le_minimum_ce_length = min_ce_length; 5822 hci_stack->le_maximum_ce_length = max_ce_length; 5823 } 5824 #endif 5825 5826 /** 5827 * @brief Updates the connection parameters for a given LE connection 5828 * @param handle 5829 * @param conn_interval_min (unit: 1.25ms) 5830 * @param conn_interval_max (unit: 1.25ms) 5831 * @param conn_latency 5832 * @param supervision_timeout (unit: 10ms) 5833 * @returns 0 if ok 5834 */ 5835 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5836 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5837 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5838 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5839 connection->le_conn_interval_min = conn_interval_min; 5840 connection->le_conn_interval_max = conn_interval_max; 5841 connection->le_conn_latency = conn_latency; 5842 connection->le_supervision_timeout = supervision_timeout; 5843 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5844 hci_run(); 5845 return 0; 5846 } 5847 5848 /** 5849 * @brief Request an update of the connection parameter for a given LE connection 5850 * @param handle 5851 * @param conn_interval_min (unit: 1.25ms) 5852 * @param conn_interval_max (unit: 1.25ms) 5853 * @param conn_latency 5854 * @param supervision_timeout (unit: 10ms) 5855 * @returns 0 if ok 5856 */ 5857 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5858 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5859 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5860 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5861 connection->le_conn_interval_min = conn_interval_min; 5862 connection->le_conn_interval_max = conn_interval_max; 5863 connection->le_conn_latency = conn_latency; 5864 connection->le_supervision_timeout = supervision_timeout; 5865 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5866 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5867 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5868 return 0; 5869 } 5870 5871 #ifdef ENABLE_LE_PERIPHERAL 5872 5873 /** 5874 * @brief Set Advertisement Data 5875 * @param advertising_data_length 5876 * @param advertising_data (max 31 octets) 5877 * @note data is not copied, pointer has to stay valid 5878 */ 5879 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5880 hci_stack->le_advertisements_data_len = advertising_data_length; 5881 hci_stack->le_advertisements_data = advertising_data; 5882 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5883 hci_run(); 5884 } 5885 5886 /** 5887 * @brief Set Scan Response Data 5888 * @param advertising_data_length 5889 * @param advertising_data (max 31 octets) 5890 * @note data is not copied, pointer has to stay valid 5891 */ 5892 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5893 hci_stack->le_scan_response_data_len = scan_response_data_length; 5894 hci_stack->le_scan_response_data = scan_response_data; 5895 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5896 hci_run(); 5897 } 5898 5899 /** 5900 * @brief Set Advertisement Parameters 5901 * @param adv_int_min 5902 * @param adv_int_max 5903 * @param adv_type 5904 * @param direct_address_type 5905 * @param direct_address 5906 * @param channel_map 5907 * @param filter_policy 5908 * 5909 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5910 */ 5911 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5912 uint8_t direct_address_typ, bd_addr_t direct_address, 5913 uint8_t channel_map, uint8_t filter_policy) { 5914 5915 hci_stack->le_advertisements_interval_min = adv_int_min; 5916 hci_stack->le_advertisements_interval_max = adv_int_max; 5917 hci_stack->le_advertisements_type = adv_type; 5918 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5919 hci_stack->le_advertisements_channel_map = channel_map; 5920 hci_stack->le_advertisements_filter_policy = filter_policy; 5921 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5922 6); 5923 5924 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS | LE_ADVERTISEMENT_TASKS_PARAMS_SET; 5925 hci_run(); 5926 } 5927 5928 /** 5929 * @brief Enable/Disable Advertisements 5930 * @param enabled 5931 */ 5932 void gap_advertisements_enable(int enabled){ 5933 hci_stack->le_advertisements_enabled = enabled != 0; 5934 hci_update_advertisements_enabled_for_current_roles(); 5935 hci_run(); 5936 } 5937 5938 #endif 5939 5940 void hci_le_set_own_address_type(uint8_t own_address_type){ 5941 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5942 if (own_address_type == hci_stack->le_own_addr_type) return; 5943 hci_stack->le_own_addr_type = own_address_type; 5944 5945 #ifdef ENABLE_LE_PERIPHERAL 5946 // update advertisement parameters, too 5947 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5948 hci_run(); 5949 #endif 5950 #ifdef ENABLE_LE_CENTRAL 5951 // note: we don't update scan parameters or modify ongoing connection attempts 5952 #endif 5953 } 5954 5955 #endif 5956 5957 uint8_t gap_disconnect(hci_con_handle_t handle){ 5958 hci_connection_t * conn = hci_connection_for_handle(handle); 5959 if (!conn){ 5960 hci_emit_disconnection_complete(handle, 0); 5961 return 0; 5962 } 5963 // ignore if already disconnected 5964 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5965 return 0; 5966 } 5967 conn->state = SEND_DISCONNECT; 5968 hci_run(); 5969 return 0; 5970 } 5971 5972 int gap_read_rssi(hci_con_handle_t con_handle){ 5973 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5974 if (hci_connection == NULL) return 0; 5975 connectionSetAuthenticationFlags(hci_connection, AUTH_FLAG_READ_RSSI); 5976 hci_run(); 5977 return 1; 5978 } 5979 5980 /** 5981 * @brief Get connection type 5982 * @param con_handle 5983 * @result connection_type 5984 */ 5985 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5986 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5987 if (!conn) return GAP_CONNECTION_INVALID; 5988 switch (conn->address_type){ 5989 case BD_ADDR_TYPE_LE_PUBLIC: 5990 case BD_ADDR_TYPE_LE_RANDOM: 5991 return GAP_CONNECTION_LE; 5992 case BD_ADDR_TYPE_SCO: 5993 return GAP_CONNECTION_SCO; 5994 case BD_ADDR_TYPE_ACL: 5995 return GAP_CONNECTION_ACL; 5996 default: 5997 return GAP_CONNECTION_INVALID; 5998 } 5999 } 6000 6001 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 6002 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 6003 if (!conn) return HCI_ROLE_INVALID; 6004 return (hci_role_t) conn->role; 6005 } 6006 6007 6008 #ifdef ENABLE_CLASSIC 6009 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 6010 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6011 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6012 conn->request_role = role; 6013 hci_run(); 6014 return ERROR_CODE_SUCCESS; 6015 } 6016 #endif 6017 6018 #ifdef ENABLE_BLE 6019 6020 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){ 6021 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6022 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6023 6024 conn->le_phy_update_all_phys = all_phys; 6025 conn->le_phy_update_tx_phys = tx_phys; 6026 conn->le_phy_update_rx_phys = rx_phys; 6027 conn->le_phy_update_phy_options = phy_options; 6028 6029 hci_run(); 6030 6031 return 0; 6032 } 6033 6034 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6035 // check if already in list 6036 btstack_linked_list_iterator_t it; 6037 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6038 while (btstack_linked_list_iterator_has_next(&it)) { 6039 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 6040 if (entry->address_type != address_type) { 6041 continue; 6042 } 6043 if (memcmp(entry->address, address, 6) != 0) { 6044 continue; 6045 } 6046 // disallow if already scheduled to add 6047 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 6048 return ERROR_CODE_COMMAND_DISALLOWED; 6049 } 6050 // still on controller, but scheduled to remove -> re-add 6051 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 6052 return ERROR_CODE_SUCCESS; 6053 } 6054 // alloc and add to list 6055 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 6056 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 6057 entry->address_type = address_type; 6058 (void)memcpy(entry->address, address, 6); 6059 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 6060 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 6061 return ERROR_CODE_SUCCESS; 6062 } 6063 6064 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6065 btstack_linked_list_iterator_t it; 6066 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6067 while (btstack_linked_list_iterator_has_next(&it)){ 6068 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6069 if (entry->address_type != address_type) { 6070 continue; 6071 } 6072 if (memcmp(entry->address, address, 6) != 0) { 6073 continue; 6074 } 6075 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6076 // remove from controller if already present 6077 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6078 } else { 6079 // directly remove entry from whitelist 6080 btstack_linked_list_iterator_remove(&it); 6081 btstack_memory_whitelist_entry_free(entry); 6082 } 6083 return ERROR_CODE_SUCCESS; 6084 } 6085 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6086 } 6087 6088 static void hci_whitelist_clear(void){ 6089 btstack_linked_list_iterator_t it; 6090 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 6091 while (btstack_linked_list_iterator_has_next(&it)){ 6092 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 6093 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 6094 // remove from controller if already present 6095 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 6096 continue; 6097 } 6098 // directly remove entry from whitelist 6099 btstack_linked_list_iterator_remove(&it); 6100 btstack_memory_whitelist_entry_free(entry); 6101 } 6102 } 6103 6104 /** 6105 * @brief Clear Whitelist 6106 * @returns 0 if ok 6107 */ 6108 uint8_t gap_whitelist_clear(void){ 6109 hci_whitelist_clear(); 6110 hci_run(); 6111 return ERROR_CODE_SUCCESS; 6112 } 6113 6114 /** 6115 * @brief Add Device to Whitelist 6116 * @param address_typ 6117 * @param address 6118 * @returns 0 if ok 6119 */ 6120 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 6121 uint8_t status = hci_whitelist_add(address_type, address); 6122 if (status){ 6123 return status; 6124 } 6125 hci_run(); 6126 return ERROR_CODE_SUCCESS; 6127 } 6128 6129 /** 6130 * @brief Remove Device from Whitelist 6131 * @param address_typ 6132 * @param address 6133 * @returns 0 if ok 6134 */ 6135 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 6136 uint8_t status = hci_whitelist_remove(address_type, address); 6137 if (status){ 6138 return status; 6139 } 6140 hci_run(); 6141 return ERROR_CODE_SUCCESS; 6142 } 6143 6144 #ifdef ENABLE_LE_CENTRAL 6145 /** 6146 * @brief Connect with Whitelist 6147 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 6148 * @returns - if ok 6149 */ 6150 uint8_t gap_connect_with_whitelist(void){ 6151 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 6152 return ERROR_CODE_COMMAND_DISALLOWED; 6153 } 6154 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6155 hci_run(); 6156 return ERROR_CODE_SUCCESS; 6157 } 6158 6159 /** 6160 * @brief Auto Connection Establishment - Start Connecting to device 6161 * @param address_typ 6162 * @param address 6163 * @returns 0 if ok 6164 */ 6165 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 6166 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6167 return ERROR_CODE_COMMAND_DISALLOWED; 6168 } 6169 6170 uint8_t status = hci_whitelist_add(address_type, address); 6171 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 6172 return status; 6173 } 6174 6175 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 6176 6177 hci_run(); 6178 return ERROR_CODE_SUCCESS; 6179 } 6180 6181 /** 6182 * @brief Auto Connection Establishment - Stop Connecting to device 6183 * @param address_typ 6184 * @param address 6185 * @returns 0 if ok 6186 */ 6187 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 6188 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 6189 return ERROR_CODE_COMMAND_DISALLOWED; 6190 } 6191 6192 hci_whitelist_remove(address_type, address); 6193 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 6194 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6195 } 6196 hci_run(); 6197 return 0; 6198 } 6199 6200 /** 6201 * @brief Auto Connection Establishment - Stop everything 6202 * @note Convenience function to stop all active auto connection attempts 6203 */ 6204 uint8_t gap_auto_connection_stop_all(void){ 6205 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 6206 return ERROR_CODE_COMMAND_DISALLOWED; 6207 } 6208 hci_whitelist_clear(); 6209 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 6210 hci_run(); 6211 return ERROR_CODE_SUCCESS; 6212 } 6213 6214 uint16_t gap_le_connection_interval(hci_con_handle_t con_handle){ 6215 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6216 if (!conn) return 0; 6217 return conn->le_connection_interval; 6218 } 6219 #endif 6220 #endif 6221 6222 #ifdef ENABLE_CLASSIC 6223 /** 6224 * @brief Set Extended Inquiry Response data 6225 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 6226 * @note has to be done before stack starts up 6227 */ 6228 void gap_set_extended_inquiry_response(const uint8_t * data){ 6229 hci_stack->eir_data = data; 6230 } 6231 6232 /** 6233 * @brief Start GAP Classic Inquiry 6234 * @param duration in 1.28s units 6235 * @return 0 if ok 6236 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 6237 */ 6238 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 6239 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 6240 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6241 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 6242 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 6243 } 6244 hci_stack->inquiry_state = duration_in_1280ms_units; 6245 hci_run(); 6246 return 0; 6247 } 6248 6249 /** 6250 * @brief Stop GAP Classic Inquiry 6251 * @returns 0 if ok 6252 */ 6253 int gap_inquiry_stop(void){ 6254 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 6255 // emit inquiry complete event, before it even started 6256 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 6257 hci_emit_event(event, sizeof(event), 1); 6258 return 0; 6259 } 6260 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 6261 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 6262 hci_run(); 6263 return 0; 6264 } 6265 6266 void gap_inquiry_set_lap(uint32_t lap){ 6267 hci_stack->inquiry_lap = lap; 6268 } 6269 6270 6271 /** 6272 * @brief Remote Name Request 6273 * @param addr 6274 * @param page_scan_repetition_mode 6275 * @param clock_offset only used when bit 15 is set 6276 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 6277 */ 6278 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 6279 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6280 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 6281 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 6282 hci_stack->remote_name_clock_offset = clock_offset; 6283 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 6284 hci_run(); 6285 return 0; 6286 } 6287 6288 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 6289 hci_stack->gap_pairing_state = state; 6290 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 6291 hci_run(); 6292 return 0; 6293 } 6294 6295 /** 6296 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 6297 * @param addr 6298 * @param pin_data 6299 * @param pin_len 6300 * @return 0 if ok 6301 */ 6302 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 6303 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6304 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 6305 hci_stack->gap_pairing_pin_len = pin_len; 6306 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 6307 } 6308 6309 /** 6310 * @brief Legacy Pairing Pin Code Response 6311 * @param addr 6312 * @param pin 6313 * @return 0 if ok 6314 */ 6315 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 6316 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 6317 } 6318 6319 /** 6320 * @brief Abort Legacy Pairing 6321 * @param addr 6322 * @param pin 6323 * @return 0 if ok 6324 */ 6325 int gap_pin_code_negative(bd_addr_t addr){ 6326 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6327 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 6328 } 6329 6330 /** 6331 * @brief SSP Passkey Response 6332 * @param addr 6333 * @param passkey 6334 * @return 0 if ok 6335 */ 6336 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 6337 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6338 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 6339 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 6340 } 6341 6342 /** 6343 * @brief Abort SSP Passkey Entry/Pairing 6344 * @param addr 6345 * @param pin 6346 * @return 0 if ok 6347 */ 6348 int gap_ssp_passkey_negative(const bd_addr_t addr){ 6349 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6350 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 6351 } 6352 6353 /** 6354 * @brief Accept SSP Numeric Comparison 6355 * @param addr 6356 * @param passkey 6357 * @return 0 if ok 6358 */ 6359 int gap_ssp_confirmation_response(const bd_addr_t addr){ 6360 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6361 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 6362 } 6363 6364 /** 6365 * @brief Abort SSP Numeric Comparison/Pairing 6366 * @param addr 6367 * @param pin 6368 * @return 0 if ok 6369 */ 6370 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 6371 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 6372 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 6373 } 6374 6375 #ifdef ENABLE_EXPLICIT_IO_CAPABILITIES_REPLY 6376 6377 static uint8_t gap_set_auth_flag_and_run(const bd_addr_t addr, hci_authentication_flags_t flag){ 6378 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6379 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6380 connectionSetAuthenticationFlags(conn, flag); 6381 hci_run(); 6382 return ERROR_CODE_SUCCESS; 6383 } 6384 6385 uint8_t gap_ssp_io_capabilities_response(const bd_addr_t addr){ 6386 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_REPLY); 6387 } 6388 6389 uint8_t gap_ssp_io_capabilities_negative(const bd_addr_t addr){ 6390 return gap_set_auth_flag_and_run(addr, AUTH_FLAG_SEND_IO_CAPABILITIES_NEGATIVE_REPLY); 6391 } 6392 #endif 6393 6394 #ifdef ENABLE_CLASSIC_PAIRING_OOB 6395 /** 6396 * @brief Report Remote OOB Data 6397 * @param bd_addr 6398 * @param c_192 Simple Pairing Hash C derived from P-192 public key 6399 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 6400 * @param c_256 Simple Pairing Hash C derived from P-256 public key 6401 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 6402 */ 6403 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){ 6404 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6405 if (connection == NULL) { 6406 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 6407 } 6408 connection->classic_oob_c_192 = c_192; 6409 connection->classic_oob_r_192 = r_192; 6410 connection->classic_oob_c_256 = c_256; 6411 connection->classic_oob_r_256 = r_256; 6412 return ERROR_CODE_SUCCESS; 6413 } 6414 /** 6415 * @brief Generate new OOB data 6416 * @note OOB data will be provided in GAP_EVENT_LOCAL_OOB_DATA and be used in future pairing procedures 6417 */ 6418 void gap_ssp_generate_oob_data(void){ 6419 hci_stack->classic_read_local_oob_data = true; 6420 hci_run(); 6421 } 6422 6423 #endif 6424 6425 /** 6426 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 6427 * @param inquiry_mode see bluetooth_defines.h 6428 */ 6429 void hci_set_inquiry_mode(inquiry_mode_t inquiry_mode){ 6430 hci_stack->inquiry_mode = inquiry_mode; 6431 } 6432 6433 /** 6434 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 6435 */ 6436 void hci_set_sco_voice_setting(uint16_t voice_setting){ 6437 hci_stack->sco_voice_setting = voice_setting; 6438 } 6439 6440 /** 6441 * @brief Get SCO Voice Setting 6442 * @return current voice setting 6443 */ 6444 uint16_t hci_get_sco_voice_setting(void){ 6445 return hci_stack->sco_voice_setting; 6446 } 6447 6448 static int hci_have_usb_transport(void){ 6449 if (!hci_stack->hci_transport) return 0; 6450 const char * transport_name = hci_stack->hci_transport->name; 6451 if (!transport_name) return 0; 6452 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 6453 } 6454 6455 /** @brief Get SCO packet length for current SCO Voice setting 6456 * @note Using SCO packets of the exact length is required for USB transfer 6457 * @return Length of SCO packets in bytes (not audio frames) 6458 */ 6459 int hci_get_sco_packet_length(void){ 6460 int sco_packet_length = 0; 6461 6462 #ifdef ENABLE_SCO_OVER_HCI 6463 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6464 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6465 6466 if (hci_have_usb_transport()){ 6467 // see Core Spec for H2 USB Transfer. 6468 // 3 byte SCO header + 24 bytes per connection 6469 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 6470 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 6471 } else { 6472 // 3 byte SCO header + SCO packet size over the air (60 bytes) 6473 sco_packet_length = 3 + 60 * multiplier; 6474 // assert that it still fits inside an SCO buffer 6475 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6476 sco_packet_length = 3 + 60; 6477 } 6478 } 6479 #endif 6480 6481 #ifdef HAVE_SCO_TRANSPORT 6482 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 6483 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 6484 sco_packet_length = 3 + 60 * multiplier; 6485 #endif 6486 return sco_packet_length; 6487 } 6488 6489 /** 6490 * @brief Sets the master/slave policy 6491 * @param policy (0: attempt to become master, 1: let connecting device decide) 6492 */ 6493 void hci_set_master_slave_policy(uint8_t policy){ 6494 hci_stack->master_slave_policy = policy; 6495 } 6496 6497 #endif 6498 6499 HCI_STATE hci_get_state(void){ 6500 return hci_stack->state; 6501 } 6502 6503 #ifdef ENABLE_CLASSIC 6504 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6505 hci_stack->gap_classic_accept_callback = accept_callback; 6506 } 6507 #endif 6508 6509 /** 6510 * @brief Set callback for Bluetooth Hardware Error 6511 */ 6512 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6513 hci_stack->hardware_error_callback = fn; 6514 } 6515 6516 void hci_disconnect_all(void){ 6517 btstack_linked_list_iterator_t it; 6518 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6519 while (btstack_linked_list_iterator_has_next(&it)){ 6520 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6521 if (con->state == SENT_DISCONNECT) continue; 6522 con->state = SEND_DISCONNECT; 6523 } 6524 hci_run(); 6525 } 6526 6527 uint16_t hci_get_manufacturer(void){ 6528 return hci_stack->manufacturer; 6529 } 6530 6531 #ifdef ENABLE_BLE 6532 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6533 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6534 if (!hci_con) return NULL; 6535 return &hci_con->sm_connection; 6536 } 6537 6538 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6539 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6540 #endif 6541 6542 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6543 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6544 if (hci_connection == NULL) return 0; 6545 if (hci_is_le_connection(hci_connection)){ 6546 #ifdef ENABLE_BLE 6547 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6548 if (sm_conn->sm_connection_encrypted) { 6549 return sm_conn->sm_actual_encryption_key_size; 6550 } 6551 #endif 6552 } else { 6553 #ifdef ENABLE_CLASSIC 6554 if ((hci_connection->authentication_flags & AUTH_FLAG_CONNECTION_ENCRYPTED)){ 6555 return hci_connection->encryption_key_size; 6556 } 6557 #endif 6558 } 6559 return 0; 6560 } 6561 6562 int gap_authenticated(hci_con_handle_t con_handle){ 6563 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6564 if (hci_connection == NULL) return 0; 6565 6566 switch (hci_connection->address_type){ 6567 #ifdef ENABLE_BLE 6568 case BD_ADDR_TYPE_LE_PUBLIC: 6569 case BD_ADDR_TYPE_LE_RANDOM: 6570 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6571 return hci_connection->sm_connection.sm_connection_authenticated; 6572 #endif 6573 #ifdef ENABLE_CLASSIC 6574 case BD_ADDR_TYPE_SCO: 6575 case BD_ADDR_TYPE_ACL: 6576 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6577 #endif 6578 default: 6579 return 0; 6580 } 6581 } 6582 6583 int gap_secure_connection(hci_con_handle_t con_handle){ 6584 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6585 if (hci_connection == NULL) return 0; 6586 6587 switch (hci_connection->address_type){ 6588 #ifdef ENABLE_BLE 6589 case BD_ADDR_TYPE_LE_PUBLIC: 6590 case BD_ADDR_TYPE_LE_RANDOM: 6591 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6592 return hci_connection->sm_connection.sm_connection_sc; 6593 #endif 6594 #ifdef ENABLE_CLASSIC 6595 case BD_ADDR_TYPE_SCO: 6596 case BD_ADDR_TYPE_ACL: 6597 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6598 #endif 6599 default: 6600 return 0; 6601 } 6602 } 6603 6604 bool gap_bonded(hci_con_handle_t con_handle){ 6605 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6606 if (hci_connection == NULL) return 0; 6607 6608 #ifdef ENABLE_CLASSIC 6609 link_key_t link_key; 6610 link_key_type_t link_key_type; 6611 #endif 6612 switch (hci_connection->address_type){ 6613 #ifdef ENABLE_BLE 6614 case BD_ADDR_TYPE_LE_PUBLIC: 6615 case BD_ADDR_TYPE_LE_RANDOM: 6616 return hci_connection->sm_connection.sm_le_db_index >= 0; 6617 #endif 6618 #ifdef ENABLE_CLASSIC 6619 case BD_ADDR_TYPE_SCO: 6620 case BD_ADDR_TYPE_ACL: 6621 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6622 #endif 6623 default: 6624 return false; 6625 } 6626 } 6627 6628 #ifdef ENABLE_BLE 6629 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6630 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6631 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6632 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6633 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6634 return sm_conn->sm_connection_authorization_state; 6635 } 6636 #endif 6637 6638 #ifdef ENABLE_CLASSIC 6639 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){ 6640 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6641 if (!conn) return GAP_CONNECTION_INVALID; 6642 conn->sniff_min_interval = sniff_min_interval; 6643 conn->sniff_max_interval = sniff_max_interval; 6644 conn->sniff_attempt = sniff_attempt; 6645 conn->sniff_timeout = sniff_timeout; 6646 hci_run(); 6647 return 0; 6648 } 6649 6650 /** 6651 * @brief Exit Sniff mode 6652 * @param con_handle 6653 @ @return 0 if ok 6654 */ 6655 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6656 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6657 if (!conn) return GAP_CONNECTION_INVALID; 6658 conn->sniff_min_interval = 0xffff; 6659 hci_run(); 6660 return 0; 6661 } 6662 6663 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){ 6664 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6665 if (!conn) return GAP_CONNECTION_INVALID; 6666 conn->sniff_subrating_max_latency = max_latency; 6667 conn->sniff_subrating_min_remote_timeout = min_remote_timeout; 6668 conn->sniff_subrating_min_local_timeout = min_local_timeout; 6669 hci_run(); 6670 return ERROR_CODE_SUCCESS; 6671 } 6672 6673 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){ 6674 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6675 if (!conn) return GAP_CONNECTION_INVALID; 6676 conn->qos_service_type = service_type; 6677 conn->qos_token_rate = token_rate; 6678 conn->qos_peak_bandwidth = peak_bandwidth; 6679 conn->qos_latency = latency; 6680 conn->qos_delay_variation = delay_variation; 6681 hci_run(); 6682 return ERROR_CODE_SUCCESS; 6683 } 6684 6685 void gap_set_page_scan_activity(uint16_t page_scan_interval, uint16_t page_scan_window){ 6686 hci_stack->new_page_scan_interval = page_scan_interval; 6687 hci_stack->new_page_scan_window = page_scan_window; 6688 hci_run(); 6689 } 6690 6691 void gap_set_page_scan_type(page_scan_type_t page_scan_type){ 6692 hci_stack->new_page_scan_type = (uint8_t) page_scan_type; 6693 hci_run(); 6694 } 6695 6696 #endif 6697 6698 void hci_halting_defer(void){ 6699 if (hci_stack->state != HCI_STATE_HALTING) return; 6700 switch (hci_stack->substate){ 6701 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6702 case HCI_HALTING_CLOSE: 6703 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6704 break; 6705 default: 6706 break; 6707 } 6708 } 6709 6710 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6711 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6712 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6713 if (le_device_db_index >= le_device_db_max_count()) return; 6714 uint8_t offset = le_device_db_index >> 3; 6715 uint8_t mask = 1 << (le_device_db_index & 7); 6716 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6717 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6718 // note: go back to remove entries, otherwise, a remove + add will skip the add 6719 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6720 } 6721 } 6722 6723 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6724 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6725 if (le_device_db_index >= le_device_db_max_count()) return; 6726 uint8_t offset = le_device_db_index >> 3; 6727 uint8_t mask = 1 << (le_device_db_index & 7); 6728 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6729 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6730 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6731 } 6732 } 6733 6734 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6735 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6736 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6737 } 6738 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6739 // restart le resolving list update 6740 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6741 } 6742 return ERROR_CODE_SUCCESS; 6743 } 6744 #endif 6745 6746 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6747 void hci_setup_test_connections_fuzz(void){ 6748 hci_connection_t * conn; 6749 6750 // default address: 66:55:44:33:00:01 6751 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6752 6753 // setup Controller info 6754 hci_stack->num_cmd_packets = 255; 6755 hci_stack->acl_packets_total_num = 255; 6756 6757 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6758 addr[5] = 0x01; 6759 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6760 conn->con_handle = addr[5]; 6761 conn->role = HCI_ROLE_SLAVE; 6762 conn->state = RECEIVED_CONNECTION_REQUEST; 6763 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6764 6765 // setup incoming Classic SCO connection with con handle 0x0002 6766 addr[5] = 0x02; 6767 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6768 conn->con_handle = addr[5]; 6769 conn->role = HCI_ROLE_SLAVE; 6770 conn->state = RECEIVED_CONNECTION_REQUEST; 6771 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6772 6773 // setup ready Classic ACL connection with con handle 0x0003 6774 addr[5] = 0x03; 6775 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6776 conn->con_handle = addr[5]; 6777 conn->role = HCI_ROLE_SLAVE; 6778 conn->state = OPEN; 6779 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6780 6781 // setup ready Classic SCO connection with con handle 0x0004 6782 addr[5] = 0x04; 6783 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6784 conn->con_handle = addr[5]; 6785 conn->role = HCI_ROLE_SLAVE; 6786 conn->state = OPEN; 6787 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6788 6789 // setup ready LE ACL connection with con handle 0x005 and public address 6790 addr[5] = 0x05; 6791 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6792 conn->con_handle = addr[5]; 6793 conn->role = HCI_ROLE_SLAVE; 6794 conn->state = OPEN; 6795 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6796 conn->sm_connection.sm_connection_encrypted = 1; 6797 } 6798 6799 void hci_free_connections_fuzz(void){ 6800 btstack_linked_list_iterator_t it; 6801 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6802 while (btstack_linked_list_iterator_has_next(&it)){ 6803 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6804 btstack_linked_list_iterator_remove(&it); 6805 btstack_memory_hci_connection_free(con); 6806 } 6807 } 6808 void hci_simulate_working_fuzz(void){ 6809 hci_init_done(); 6810 hci_stack->num_cmd_packets = 255; 6811 } 6812 #endif 6813